Thursday, October 31, 2019
Write an exemplification essay on the qualities of an effective
Write an exemplification on the qualities of an effective teacher - Essay Example in class; they have to strengthen these qualities and, finally, work on developing the qualities that they do not have since these qualities may affect the learning process of their students. An effectual instructor has to be exceptionally well prepared. This ensures that the teacherââ¬â¢s work in preparation for class is done on time and in such a way that students will be able to understand what their teacher is discussing. Furthermore, the teacher will have to be able to teach his students in an organized manner, which means that they will get more from him than if he had not been well organized. The teacher will have to be able to anticipate the questions which his students are likely to ask after the discussion and will have to answer these questions effectively. Therefore, it is a fact that a well-organized teacher will be able to cover more with his/her students than a teacher not se well organized. A teacher has to be in every way supportive of his/her students. This leads to the development of trust between the teacher and the students, and due to this, the latter will be more receptive when in class. As stated above, every student has unique abilities and it is up to the teacher to encourage the development of these abilities to ensure that there is more diversity in class. In this way, students with different abilities will be able to share their knowledge with each other, and this will bring about richer learning environment. A teacher has to be persistent with his/her students. There are certain students who require a persistent teacher to develop interest in learning. It is, therefore, important that the teacher maintain his/her persistence in encouraging such students to take an active interest in their education even though such students may be stubborn. If such students need special help, then the teacher should be patient enough to provide such help or, if he/she cannot do this, then he/she should ask a person more suited for the task to do so.
Tuesday, October 29, 2019
Globalization of Production Essay Example | Topics and Well Written Essays - 6250 words
Globalization of Production - Essay Example the skilled labors in US have experienced a steady increase, while that of the less skilled workforce have more or less stagnated or in some case, have been reduced. The inequality in the increasing wage has risen as more trade has been happened with the low wage countries. The effect of the trade on the wages cannot be identified easily as some other intensive shocks have also been occurred to the markets at same time. For an instance, the initiation of the information technology seems to raise the demand for the skilled labor and had allowed the organizations to remove number of jobs performed by less skilled workforce. In absence of clear indication, associating both wages and trade, a number of researchers have attributed the growth in skilled wage gap towards the technological change. In general, a considerable fraction of the increase in the world trade since 1970s has adopted the trade from in the immediate inputs. In particular, the rise in the world trade would take the form of foreign outsourcing. Some instances are also there; the leading shoe manufacturer Nike outsources the production of the footwear to the organizations in Asia. Dell outsources the production of both the peripheral devices as well as the components which make up the personal computers to the suppliers across the globe. Asia Pacific is a region of several contrasts. The entire region has accomplished unparalleled growth as well as development in the recent decades. However, the general scenario seems to hide a great economic diversity, development experiences as well as challenges. Asia is growingly carrying out a role of an international growth pole and is emerging as a hub for the information technology and manufacturing across the world economy and that too in a greater pace. Despite of... This paper says that in the modern times the worldwide markets are integrated in almost every respect. This integration is not just limited to exchange of goods and services rather it has extended to interlinked financial markets like stock market and money market. This process of globalisation has undoubtedly yielded positive results for the overall economy. The integration of the trading activities across the globe has enabled the consumers to use the commodities that may not be indigenously produced. Other than this various multinationals have established their operations in countries other than their base country. By way of this the host country is not just able to make use of the commodities in fact it also opens up a variety of opportunities for the host country such as higher employment opportunities, improved standard of living, improved business outlook, better infrastructural opportunities etc. However, these opportunities have also necessitated establishing a set of global laws for the regulation of the cross-border activities. This report approves that all the countries already have their own set of national laws for regulating the domestic businesses but the concept of globalisation has made it important to devise a set of global standards for the internationally operating businesses. Since the countries are now engaged in overseas businesses it is important that they adhere to a global system. An international framework will promote better relations by minimising the conflicts between two countries and will lead to overall economic prosperity.
Sunday, October 27, 2019
The Disadvantages Of Watching Television Media Essay
The Disadvantages Of Watching Television Media Essay This article talks about the disadvantages of watching television and the reality television shows, in this article the author is trying to say that there are a lot of disadvantages of watching television. There are many of disadvantages they are: it makes the person who is watching to increase heaviness because of always sitting in front of the television not doing anything else. Second it makes you misuse your time, as instead of not making a very useful things and habits or even sports you keep stuck to watching and this makes you devastate a lot of time. Third , it promotes compliance as when teenagers of children are watching these reality television it makes them stay and dont encourage them to have a purpose in their life so it encourages passivity. The author aim in this article is to deliver and focus on the disadvantages of television. He addresses the message to especially teens and children and this source is very useful in the research. In this article the Jillian karger is talking about the effects of the reality television shows on people. She says that it has a lot of effects, some of these effects are that the improbable outlook that people would believe that life is so vivid and that life should be full of performance and that is not in the real life so, this is improbable opportunity. Also, the lack of isolation that the people are in this reality TV has no privacy everyone is watching so there is nothing private everything is shown on television. Also, there is diversion as when the people watch these reality shows they feel that all what they see in these reality shows are reality and after that they dont want to live the real life they are living as it is not like the life they are seeing in these reality shows. It also, makes you wish bad luck others. The purpose of the article is to make the audience know the effects of watching these reality television shows on the teens and all the people watching these reality television shows. The author is addressing the teens and the children because they are the most sectors of people in the society who are watching these reality television shows so the author is trying to make them know that there are a lot of effects of watching reality shows. B. Slocum, Charles. The Real History of Reality TV. Wga. 25 Feb. 2010 In this article the author says when and where and how the first reality television started and who were the people watching it mainly the author in this article is giving a historical background for the reality television as the people who are interested in the issue of reality television, the author is providing them with information to know more about this issue. The author said that when reality television first started it was captured with cameras and it started first people loved it very much and they were enjoying watching these reality television shows and that there were a lot of people who were loving to watch these shows. After that, these shoes were developed until they are seen as today in the television and there are a lot of people who are really very interested in these shows nowadays. The author in this article is delivering the message to all the person the author is trying to make the people who are reading this article get informational background. In this article the author purpose is to make people know more information about this issue. Reality Television Introduction. Enotes. 25 Feb. 2010 The article is talking about introduction to reality television and some of the historical back ground about the reality television. The article is talking about what is reality television and why it started and why is people interested in it. What really makes people very interested and entertained when watching these reality television shows may be they are having fun when they are seeing people in their daily life and how they face challenges and live in their own life and can begin a new life and make challenges and be very successful. This maybe giving them experience in their lives. In the article the purpose is to make the audience just think whether the reality television is good and worth watching or not. Also, to know these shows what is the benefit from watching them and spending a lot of time in front of the television just watching people leading day by day in their life? The author is addressing the message to all the people. The Reality TV Controversies.Case Studies.25 Feb. 2010 In this article the author tries to focus on the advantages and disadvantages of the reality television as to make the audience know what are the pros and cons of reality television. the author says that reality television has lots of disadvantages as first it has no privacy as people who are in these reality shows everyone is watching them and their steps as if they are in public so there is no privacy for them , also it makes people who are in this reality television really ashamed as everyone is watching them and every step they are making. The author didnt forget also to talk about the advantages of reality television he said that may be this reality television gives the audience some experience from the daily life challenges and people they are watching how leading their daily life challenges, I can also makes them gain some entertainment and time of fun as it makes them some how happy from watching these reality shows. the purpose of this article is that the author want to deli ver the message of that there are a lot of pros and cons for reality television. He delivers the message to especially the teens who are addicted to watching these reality shows. Ethics and Reality TV.Atheism. 25 Feb. 2010 in the article the author is trying to ask a very important question , this question is should people watch these reality television shows or not . some people think that watching these reality shows is really important to get entertainment and to get experience from the challenges and live of people they are watching and that will make them better and know how to take right decisions in their lives and to think right. Others think that it is just very bad shows as they make people humiliated and feeling bad and they think that this makes also people watching make bad habits like wishing bad luck to some people. All of these reasons makes the author raise this question to the audience just to make them think of the issue in a very serious way to watch these shows or not and to know the advantages and disadvantages of it , the good and the bad points to be able to know the pros and con of this issue . the author is addressing his article to the teens. Sears, Alan. Whats real about Reality TV?New socialist. 25 Feb. 2010 In this article the author says that Reality TV is a type that combines basics of talk show, game show, vulgar pseudo-anthropology and pro wrestling. It traces the actions of non-actors placed in various situations facing set challenges. The success of Survivor played a big role in initiation the genre in North America. It was popular enough to make voted off the island a part of our everyday language. The success of Reality TV was driven first by commercial considerations. What makes these shows popular to producers is in part the same process of reorganization to force up proceeds that we are considering in all kinds of workplaces. It involves the use of new technology and work restructuring to deskill the workforce and valve into cheaper work sources. Reality TV is very cheap to make, requiring fewer writers and actors than customary indoctrination while making use of incomplete sets and fixed cameras for at least some of the action. It is a big profit centre for the networks, whi ch are facing increased opposition in the digital age. The purpose of the author in this article is that to know the introduction of reality television and he discuss the introduction of reality television. He addresses all the people In the society. Reality TV Gives Contestants a New Reasonà to Smile.Perio. 25 Feb. 2010 In addition to treating the periodontal disease, the patients smile may also get better. This is significant because a smile is often one of the first things people notice about another person. When examination people on television be given a whole change, its clear that the look of the persons smile can greatly influence their self-worth. I see this in my perform everyday. Now that Americans are living longer, superficial operation has become more popular. spoken artificial operation has also felt this trend as it has knowledgeable a important shift toward cosmetic-related surgery to help improve the smile. Excessive gum tissue can create a gummy smile, but the periodontist can perform a crown expansion process to remove excess gum tissue and expose an ideal smile. on the other hand, a persons teeth may appear too long if their gums have receded or shrink. This can often be corrected with soft tissue graft events. Dental implants, an artificial tooth root placed into the jaw to hold a replacement tooth or bridge can be used to replace missing teeth. Wieczorek, mark. Reality TV Faked? So What?Markzilla. 25 Feb. 2010 Apparently talk shows and reality television are some how the same s reality television is that these reality television and talk shows has a lot of advantages and disadvantages as these can make people make smile and make them happy and also it can make them gain money and these reality television shows will be a negative points of views as there will be a lack of privacy as what will be made on the television will not all be real and there will be a lck of privacy.
Friday, October 25, 2019
Installing Windows :: Essays Papers
Installing Windows Starting an Internet connection and establishing an email account is a long, hard process. It is not as difficult as designing a web page or starting your own web browser, but it is a difficulty within itself. It is specifically difficult with computers equipped with the Windows ââ¬â¢98 software. I will explain the process of logging onto the Internet and establishing an email account. In order to begin the task of a dial-up, you must first establish a configuration. This process is begun by right clicking on the ââ¬Å"Startâ⬠button at the bottom left of your task bar. By selecting the ââ¬Å"Settingsâ⬠option, and then selecting the ââ¬Å"Control Panelâ⬠icon, you are gradually edging towards a dial-up network connection. Next, double-click the ââ¬Å"Add/Remove Programsâ⬠icon in the window. This icon resembles two disks with one red and one green dot on them. Click on the ââ¬Å"Windows Setupâ⬠tab at the top of the window that has opened. This should be followed by a click of the ââ¬Å"Detailâ⬠button. You should then click to add a check in the box next to the ââ¬Å"Dial-up Networkingâ⬠icon, which is in the shape of a telephone. You should then click ââ¬Å"Nextâ⬠for the next two screens. This closes the ââ¬Å"communicationsâ⬠and ââ¬Å"Add /Remove Programsâ⬠windows. At this point, ââ¬Å"Dial -Up Networkingâ⬠has been installed in the computer. You must now restart your computer, by simply clicking onto the ââ¬Å"Startâ⬠button once again, which is located at the bottom left of the screen. After this, you should click onto the ââ¬Å"Shut Downâ⬠button. A window will pop up with the options of: Shut down, Stand-by, Restart, or Restart in MS-DOS mode. You should choose the ââ¬Å"Restartâ⬠option. This will reboot the computer. You are now ready to continue with step 2 of the process. Begin step two by clicking, once again, on the ââ¬Å"Startâ⬠button and follow this up by clicking on ââ¬Å"Programsâ⬠and then ââ¬Å"Accessoriesâ⬠. ââ¬Å"Communicationsâ⬠should then selected and then ââ¬Å"Dial-Up Networking.â⬠You should then click onto the UVic NetLink icon, which resembles a telephone, with two computer screens or monitors attached to it. You should right-click this icon, which leads to the ââ¬Å"Propertiesâ⬠menu. In the ââ¬Å"Propertiesâ⬠menu, click the tab labeled ââ¬Å"Options.â⬠Under the section labeled ââ¬Å"Connection Control,â⬠check to see if the box next to the statement ââ¬Å"Bring up terminal window after dialing,â⬠is checked.
Thursday, October 24, 2019
Maxims and Sayings, Herakleitos Essay
The ââ¬Å"Unity of Oppositesâ⬠is a very interesting piece. The concept of opposites and the balance that lies within all is the main idea. By placing these values and definitions as one in the same Herakleitos goes a step further. Although he only discusses a limited number of things and their opposites, this theory can go beyond and be forever limitless in the categorizing of opposites. It sheds light to the idea of balance and good and bad, heaven and hell, life and death. All things in this universe have an opposite and that which is living is also death and here within lies the harmony of absolute knowledge. In a way I believe Herekleitos is seeking wisdom by defining mans belief in religion and themselves. As so stated in his final verse ââ¬Å"I inquired of myselfâ⬠. One excerpt from the maxim stating, ââ¬Å" War is father of all and king of all; and some he made gods and some men, some slaves and some free.â⬠, shows a strong belief in warfare and accurately depicts the Mycenaean culture of the warrior class. This culture took great pride in their belief of war and strength in pillaging. They lived by the idea that to survive one must attack before being attacked. Just as in the saying by Herakleitos, ââ¬Å"The name of the bow is life, but its work is death.â⬠, a belief for warfare and weaponry is shown. By giving life itself to the object of the bow, the Mycenaean culture can be defined as a war mongering culture. This theory is clearly defined as well in the art piece known as ââ¬Å"The Warrior Vaseâ⬠. By depicting ancient warriors on this vase, the Mycenaean culture shows that even on a home based piece of pottery, one is reminded of the true value of warfare and strength. The men portrayed on this vase also show a high level of weaponry and defense for an ancient culture with minimal contact with Egyptians and well before roman times.
Wednesday, October 23, 2019
Evaluating The Waste Water Treatment Processes Environmental Sciences Essay
Domestic effluent intervention or sewerage intervention, is the procedure of taking contaminations from effluent and family sewerage, both overflow ( wastewaters ) and domestic. It includes physical, chemical, and biological procedures to take physical, chemical and biological contaminations. Its aim is to bring forth an environmentally-safe fluid waste watercourse ( or treated wastewater ) and a solid waste ( or treated sludge ) suitable for disposal or reuse ( normally as farm fertiliser ) . Using advanced engineering it is now possible to re-use sewerage wastewater for imbibing H2O, although Singapore is the lone state to implement such engineering on a production graduated table in its production of NEWater. 1.2 ORIGIN OF WASTE WATER Sewage is created by residential, institutional, and commercial and industrial constitutions and includes family waste liquid from lavatories, baths, showers, kitchens, sinks and so forth that is disposed of via cloacas. In many countries, sewerage besides includes liquid waste from industry and commercialism. The separation and draining of family waste into greywater and blackwater is going more common in the developed universe, with greywater being permitted to be used for irrigating workss or recycled for blushing lavatories. Sewage may include stormwater overflow. Sewage systems capable of managing stormwater are known as combined systems. Combined sewer systems are normally avoided now because precipitation causes widely changing flows cut downing sewerage intervention works efficiency. Combined cloacas require much larger, more expensive, intervention installations than healthful cloacas. Heavy storm overflow may overpower the sewerage intervention system, doing a spill or flood. Sanitary cloacas are typically much smaller than combined cloacas, and they are non designed to transport stormwater. Backups of natural sewerage can happen if inordinate Infiltration/Inflow is allowed into a healthful cloaca system. Modern sewered developments be given to be provided with separate storm drain systems for rainwater. As rainfall travels over roofs and the land, it may pick up assorted contaminations including dirt atoms and other deposit, heavy metals, organic compounds, carnal waste, and oil and lubricating oil. ( See urban overflow. ) Some legal powers require stormwater to have some degree of intervention before being discharged straight into waterways. Examples of intervention procedures used for stormwater include keeping basins, wetlands, buried vaults with assorted sorts of media filters, and vortex centrifuges ( to take harsh solids ) . Chapter TWO 2.1 OVERVIEW OF WASTE WATER TREATMENT PROCESSES Sewage can be treated near to where it is created, a decentralized system, ( in infected armored combat vehicles, biofilters or aerophilic intervention systems ) , or be collected and transported via a web of pipes and pump Stationss to a municipal intervention works, a centralized system, ( see sewage and pipes and substructure ) . Sewage aggregation and intervention is typically capable to local, province and federal ordinances and criterions. Industrial beginnings of effluent frequently require specialised intervention processes as shown in the diagram below: Procedure Flow Diagram for a typical intervention works via Subsurface Flow Constructed Wetlands ( SFCW ) Sewage intervention by and large involves three phases, called primary, secondary and third intervention. Primary intervention consists of temporarily keeping the sewerage in a quiescent basin where heavy solids can settle to the underside while oil, lubricating oil and lighter solids float to the surface. The settled and floating stuffs are removed and the staying liquid may be discharged or subjected to secondary intervention. Secondary intervention removes dissolved and suspended biological affair. Secondary intervention is typically performed by autochthonal, water-borne microorganisms in a managed home ground. Secondary intervention may necessitate a separation procedure to take the microorganisms from the treated H2O prior to dispatch or third intervention. Third intervention is sometimes defined as anything more than primary and secondary intervention in order to let rejection into a extremely sensitive or delicate ecosystem ( estuaries, low-flow rivers, coral reefs etc. ) . Treated H2O is sometimes disinfected chemically or physically ( for illustration, by lagunas and microfiltration ) prior to dispatch into a watercourse, river, bay, laguna or wetland, or it can be used for the irrigation of a golf class, green manner or park. If it is sufficiently clean, it can besides be used for groundwater recharge or agricultural intents. 2.2 PRE-TREATMENT Pre-treatment removes stuffs that can be easy collected from the natural waste H2O before they damage or clog the pumps and skimmers of primary intervention clarifiers ( rubbish, tree limbs, foliages, etc. ) . Screening The inflowing sewerage H2O is screened to take all big objects like tins, shreds, sticks, fictile packages etc. carried in the sewerage watercourse. This is most normally done with an automated automatically raked saloon screen in modern workss functioning big populations, whilst in smaller or less modern workss a manually cleaned screen may be used. The raking action of a mechanical saloon screen is typically paced harmonizing to the accretion on the saloon screens and/or flow rate. The solids are collected and subsequently disposed in a landfill or incinerated. Bar screens or mesh screens of changing sizes may be used to optimise solids remotion. If gross solids are non removed they become entrained in pipes and traveling parts of the intervention works and can do significant harm and inefficiency in the procedure. GRIT REMOVAL Pre-treatment may include a sand or grit channel or chamber where the speed of the entrance effluent is adjusted to let the colony of sand, grit, rocks, and broken glass. These atoms are removed because they may damage pumps and other equipment. For little healthful cloaca systems, the grit Chamberss may non be necessary, but grit remotion is desirable at larger workss. FAT AND GREASE REMOVAL In some larger workss, fat and lubricating oil is removed by go throughing the sewerage through a little armored combat vehicle where skimmers collect the fat natation on the surface. Air blowers in the base of the armored combat vehicle may besides be used to assist retrieve the fat as a foam. In most workss nevertheless, fat and lubricating oil remotion takes topographic point in the primary colony armored combat vehicle utilizing mechanical surface skimmers. 2.3 PRIMARY TREATMENT In the primary deposit phase, sewerage flows through big armored combat vehicles, normally called ââ¬Å" primary clarifiers â⬠or ââ¬Å" primary deposit armored combat vehicles. â⬠The armored combat vehicles are used to settle sludge while lubricating oil and oils rise to the surface and are skimmed off. Primary settling armored combat vehicles are normally equipped with automatically goaded scrapers that continually drive the gathered sludge towards a hopper in the base of the armored combat vehicle where it is pumped to sludge intervention installations. Grease and oil from the drifting stuff can sometimes be recovered for saponification. The dimensions of the armored combat vehicle should be designed to consequence remotion of a high per centum of the floatables and sludge. A typical deposit armored combat vehicle may take from 60 to 65 per centum of suspended solids, and from 30 to 35 per centum of biochemical O demand ( BOD ) from the sewerage. 2.4 SECONDARY TREATMENT Secondary intervention is designed to well degrade the biological content of the sewerage which are derived from human waste, nutrient waste, soaps and detergent. The bulk of municipal workss handle the settled sewerage spirits utilizing aerophilic biological procedures. To be effectual, the biology necessitate both O and nutrient to populate. The bacterium and Protozoa consume biodegradable soluble organic contaminations ( e.g. sugars, fats, organic short-chain C molecules, etc. ) and adhere much of the less soluble fractions into floc. Secondary intervention systems are classified as fixed-film or suspended-growth systems. Fixed-film or affiliated growing systems include dribbling filters and revolving biological contactors, where the biomass grows on media and the sewerage passes over its surface. Suspended-growth systems include activated sludge, where the biomass is assorted with the sewerage and can be operated in a smaller infinite than fixed-film systems that treat the same sum of H2O. However, fixed-film systems are more able to get by with drastic alterations in the sum of biological stuff and can supply higher remotion rates for organic stuff and suspended solids than suspended growing systems. [ 6 ] :11-13 Rough ining filters are intended to handle peculiarly strong or variable organic tonss, typically industrial, to let them to so be treated by conventional secondary intervention procedures. Features include filters filled with media to which effluent is applied. They are designed to let high hydraulic burden and a high degree of aeration. On larger installings, air is forced through the media utilizing blowers. The attendant effluent is normally within the normal scope for conventional intervention procedures. A generalised, conventional diagram of an activated sludge procedure. A filter removes a little per centum of the suspended organic affair, while the bulk of the organic affair undergoes a alteration of character, merely due to the biological oxidization and nitrification taking topographic point in the filter. With this aerophilic oxidization and nitrification, the organic solids are converted into coagulated suspended mass, which is heavier and bulkier, and can settle to the underside of a armored combat vehicle. The wastewater of the filter is hence passed through a deposit armored combat vehicle, called a secondary clarifier, secondary subsiding armored combat vehicle or humus armored combat vehicle. ACTIVATED SLUDGE In general, activated sludge workss encompass a assortment of mechanisms and procedures that use dissolved O to advance the growing of biological floc that well removes organic stuff. The procedure traps particulate stuff and can, under ideal conditions, convert ammonium hydroxide to nitrite and nitrate and finally to nitrogen gas. SURFACE-AERATED BASINS ( LAGOONS ) Many little municipal sewerage systems in the United States ( 1 million gal./day or less ) usage aerated lagunas. Most biological oxidization processes for handling industrial effluents have in common the usage of O ( or air ) and microbic action. Surface-aerated basins achieve 80 to 90 per centum remotion of BOD with keeping times of 1 to 10 yearss. The basins may run in deepness from 1.5 to 5.0 meters and utilize motor-driven aerators drifting on the surface of the effluent. In an aerated basin system, the aerators provide two maps: they transfer air into the basins required by the biological oxidization reactions, and they provide the commixture required for scattering the air and for reaching the reactants ( that is, O, effluent and bug ) . Typically, the drifting surface aerators are rated to present the sum of air tantamount to 1.8 to 2.7A kilograms O2/kWAà ·h. However, they do non supply as good commixture as is usually achieved in activated sludge systems and hence aerated basins do non accomplish the same public presentation degree as activated sludge units. Biological oxidization procedures are sensitive to temperature and, between 0 Aà °C and 40 Aà °C, the rate of biological reactions increase with temperature. Most surface aerated vass operate at between 4 Aà °C and 32 Aà °C. CONSTRUCTED WETLANDS Constructed wetlands ( can either be surface flow or subsurface flow, horizontal or perpendicular flow ) , include engineered reedbeds and belong to the household of phytorestoration and ecotechnologies ; they provide a high grade of biological betterment and depending on design, act as a primary, secondary and sometimes third intervention, besides see phytoremediation. One illustration is a little reedbed used to clean the drainage from the elephants ââ¬Ë enclosure at Chester Zoo in England ; legion CWs are used to recycle the H2O of the metropolis of Honfleur in France and legion other towns in Europe, the US, Asia and Australia. They are known to be extremely productive systems as they copy natural wetlands, called the ââ¬Å" Kidneys of the Earth â⬠for their cardinal recycling capacity of the hydrological rhythm in the biosphere. Robust and dependable, their intervention capacities improve as clip spell by, at the antonym of conventional intervention workss whose machine ry age with clip. They are being progressively used, although equal and experient design are more cardinal than for other systems and infinite restriction may hinder their usage. FILTER BEDS ( OXIDIZING BEDS ) In older workss and those having variable burdens, dribbling filter beds are used where the settled sewerage spirits is spread onto the surface of a bed made up of coke ( carbonized coal ) , limestone french friess or specially fabricated fictile media. Such media must hold big surface countries to back up the biofilms that form. The spirits is typically distributed through perforated spray weaponries. The distributed spirits drips through the bed and is collected in drains at the base. These drains besides provide a beginning of air which percolates up through the bed, maintaining it aerophilic. Biological movies of bacteriums, Protozoa and fungi signifier on the media ââ¬Ës surfaces and eat or otherwise cut down the organic content. This biofilm is frequently grazed by insect larvae, snails, and worms which help keep an optimum thickness. Overloading of beds increases the thickness of the movie taking to clogging of the filter media and ponding on the surface. SOIL BIO-TECHNOLOGY A new procedure called Soil Bio-Technology ( SBT ) developed at IIT Bombay has shown enormous betterments in procedure efficiency enabling entire H2O reuse, due to highly low runing power demands of less than 50 Js per kilogram of treated H2O. Typically SBT systems can accomplish chemical O demand ( COD ) degrees less than 10A mg/L from sewerage input of COD 400A mg/L. SBT workss exhibit high decreases in COD values and bacterial counts as a consequence of the really high microbic densenesss available in the media. Unlike conventional intervention workss, SBT workss produce undistinguished sums of sludge, preventing the demand for sludge disposal countries that are required by other engineerings. BIOLOGICAL AERATED FILTERS Biological Aerated ( or Anoxic ) Filter ( BAF ) or Biofilters combine filtration with biological C decrease, nitrification or denitrification. BAF normally includes a reactor filled with a filter media. The media is either in suspension or supported by a crushed rock bed at the pes of the filter. The double intent of this media is to back up extremely active biomass that is attached to it and to filtrate suspended solids. Carbon decrease and ammonium hydroxide transition occurs in aerophilic manner and sometime achieved in a individual reactor while nitrate transition occurs in anoxic manner. BAF is operated either in upflow or downflow constellation depending on design specified by maker. Conventional diagram of a typical revolving biological contactor ( RBC ) . The treated wastewater clarifier/settler is non included in the diagram. ROTATING BIOLOGICAL CONTACTORS Revolving biological contactors ( RBCs ) are mechanical secondary intervention systems, which are robust and capable of defying rushs in organic burden. RBCs were foremost installed in Germany in 1960 and have since been developed and refined into a dependable operating unit. The revolving discs back up the growing of bacteriums and micro-organisms nowadays in the sewerage, which break down and brace organic pollutants. To be successful, micro-organisms need both O to populate and nutrient to turn. Oxygen is obtained from the ambiance as the discs rotate. As the micro-organisms grow, they build up on the media until they are sloughed off due to shear forces provided by the revolving phonograph record in the sewerage. Effluent from the RBC is so passed through concluding clarifiers where the microorganisms in suspension settee as a sludge. The sludge is withdrawn from the clarifier for farther intervention. A functionally similar biological filtering system has become popular as portion of place fish tank filtration and purification. The fish tank H2O is drawn up out of the armored combat vehicle and so cascaded over a freely whirling corrugated fiber-mesh wheel before go throughing through a media filter and back into the fish tank. The whirling mesh wheel develops a biofilm coating of micro-organisms that feed on the suspended wastes in the fish tank H2O and are besides exposed to the ambiance as the wheel rotates. This is particularly good at taking waste. MEMBRANE BIOREACTORS Membrane bioreactors ( MBR ) combine activated sludge intervention with a membrane liquid-solid separation procedure. The membrane constituent uses low force per unit area microfiltration or extremist filtration membranes and eliminates the demand for elucidation and third filtration. The membranes are typically immersed in the aeration armored combat vehicle ; nevertheless, some applications utilize a separate membrane armored combat vehicle. One of the cardinal benefits of an MBR system is that it efficaciously overcomes the restrictions associated with hapless subsiding of sludge in conventional activated sludge ( CAS ) processes. The engineering permits bioreactor operation with well higher assorted spirits suspended solids ( MLSS ) concentration than CAS systems, which are limited by sludge subsiding. The procedure is typically operated at MLSS in the scope of 8,000-12,000A mg/L, while CAS are operated in the scope of 2,000-3,000A mg/L. The elevated biomass concentration in the MBR procedure allows for really effectual remotion of both soluble and particulate biodegradable stuffs at higher burden rates. Therefore increased sludge keeping times, normally transcending 15 yearss, guarantee complete nitrification even in highly cold conditions. SECONDARY SEDIMENTATION The concluding measure in the secondary intervention phase is to settle out the biological floc or filter stuff through a secondary clarifier and to bring forth sewage H2O incorporating low degrees of organic stuff and suspended affair. TERTIARY TREATMENT The intent of third intervention is to supply a concluding intervention phase to raise the outflowing quality before it is discharged to the receiving environment ( sea, river, lake, land, etc. ) . More than one third intervention procedure may be used at any intervention works. If disinfection is practiced, it is ever the concluding procedure. It is besides called ââ¬Å" outflowing shining. â⬠Filtration Sand filtration removes much of the residuary suspended affair. Filtration over activated C, besides called C surface assimilation, removes residuary toxins. LAGOONING Lagooning provides colony and farther biological betterment through storage in big semisynthetic pools or lagunas. These lagunas are extremely aerophilic and colonisation by native macrophytes, particularly reeds, is frequently encouraged. Small filter feeding invertebrates such as Daphnia and species of Rotifera greatly assist in intervention by taking all right particulates. NUTRIENT REMOVAL Effluent may incorporate high degrees of the foods N and P. Excessive release to the environment can take to a physique up of foods, called eutrophication, which can in bend encourage the giantism of weeds, algae, and blue-green algaes ( bluish green algae ) . This may do an algal bloom, a rapid growing in the population of algae. The algae Numberss are unsustainable and finally most of them die. The decomposition of the algae by bacteriums uses up so much of O in the H2O that most or all of the animate beings die, which creates more organic affair for the bacteriums to break up. In add-on to doing deoxygenation, some algal species produce toxins that contaminate imbibing H2O supplies. Different intervention procedures are required to take N and P. NITROGEN REMOVAL The remotion of N is effected through the biological oxidization of N from ammonium hydroxide to nitrate ( nitrification ) , followed by denitrification, the decrease of nitrate to nitrogen gas. Nitrogen gas is released to the ambiance and therefore removed from the H2O. Nitrification itself is a two-step aerophilic procedure, each measure facilitated by a different type of bacteriums. The oxidization of ammonium hydroxide ( NH3 ) to nitrite ( NO2a?ââ¬â¢ ) is most frequently facilitated by Nitrosomonas spp. ( nitroso mentioning to the formation of a nitroso functional group ) . Nitrite oxidization to nitrate ( NO3a?ââ¬â¢ ) , though traditionally believed to be facilitated by Nitrobacter spp. ( nitro mentioning the formation of a nitro functional group ) , is now known to be facilitated in the environment about entirely by Nitrospira spp. Denitrification requires anoxic conditions to promote the appropriate biological communities to organize. It is facilitated by a broad diverseness of bacteriums. Sand filters, lagooning and reed beds can all be used to cut down N, but the activated sludge procedure ( if designed good ) can make the occupation the most easy. Since denitrification is the decrease of nitrate to dinitrogen gas, an negatron giver is needed. This can be, depending on the effluent, organic affair ( from fecal matters ) , sulfide, or an added giver like methyl alcohol. PHOSPHORUS REMOVAL Phosphorus remotion is of import as it is a confining food for algae growing in many fresh H2O systems. ( For a description of the negative effects of algae, see Nutrient remotion ) . It is besides peculiarly of import for H2O reuse systems where high P concentrations may take to fouling of downstream equipment such as rearward osmosis. Phosphorus can be removed biologically in a procedure called enhanced biological P remotion. In this procedure, specific bacterium, called polyphosphate roll uping beings ( PAOs ) , are selectively enriched and roll up big measures of P within their cells ( up to 20 per centum of their mass ) . When the biomass enriched in these bacteriums is separated from the treated H2O, these biosolids have a high fertiliser value. Phosphorus remotion can besides be achieved by chemical precipitation, normally with salts of Fe ( e.g. ferrous chloride ) , aluminium ( e.g. alum ) , or lime. This may take to inordinate sludge production as hydrated oxides precipitates and the added chemicals can be expensive. Chemical P remotion requires significantly smaller equipment footmark than biological remotion, is easier to run and is frequently more dependable than biological P removalA . Another method for P remotion is to utilize farinaceous laterite. Once removed, P, in the signifier of a phosphate-rich sludge, may be stored in a land fill or resold for usage in fertiliser. Disinfection The intent of disinfection in the intervention of waste H2O is to well cut down the figure of micro-organisms in the H2O to be discharged back into the environment. The effectivity of disinfection depends on the quality of the H2O being treated ( e.g. , cloud cover, pH, etc. ) , the type of disinfection being used, the bactericidal dose ( concentration and clip ) , and other environmental variables. Cloudy H2O will be treated less successfully, since solid affair can screen organisms, particularly from ultraviolet visible radiation or if contact times are low. By and large, short contact times, low doses and high flows all militate against effectual disinfection. Common methods of disinfection include ozone, Cl, ultraviolet visible radiation, or Na hypochlorite. Chloramine, which is used for imbibing H2O, is non used in waste H2O intervention because of its continuity. Chlorination remains the most common signifier of waste H2O disinfection in North America due to its low cost and long-run history of effectivity. One disadvantage is that chlorination of residuary organic stuff can bring forth chlorinated-organic compounds that may be carcinogenic or harmful to the environment. Residual Cl or chloramines may besides be capable of chlorinating organic stuff in the natural aquatic environment. Further, because residuary Cl is toxic to aquatic species, the treated wastewater must besides be chemically dechlorinated, adding to the complexness and cost of intervention. Ultraviolet ( UV ) light can be used alternatively of Cl, I, or other chemicals. Because no chemicals are used, the treated H2O has no inauspicious consequence on beings that subsequently devour it, as may be the instance with other methods. UV radiation causes harm to the familial construction of bacteriums, viruses, and other pathogens, doing them incapable of reproduction. The cardinal disadvantages of UV disinfection are the demand for frequent lamp care and replacing and the demand for a extremely treated wastewater to guarantee that the mark micro-organisms are non shielded from the UV radiation ( i.e. , any solids nowadays in the treated wastewater may protect micro-organisms from the UV visible radiation ) . In the United Kingdom, UV visible radiation is going the most common agencies of disinfection because of the concerns about the impacts of Cl in chlorinating residuary organics in the effluent and in chlorinating organics in the receiving H2O. Some sewerage intervention s ystems in Canada and the US besides use UV visible radiation for their outflowing H2O disinfection. Ozone ( O3 ) is generated by go throughing O ( O2 ) through a high electromotive force possible resulting in a 3rd O atom going attached and organizing O3. Ozone is really unstable and reactive and oxidizes most organic stuff it comes in contact with, thereby destructing many infective micro-organisms. Ozone is considered to be safer than Cl because, unlike Cl which has to be stored on site ( extremely toxicant in the event of an inadvertent release ) , ozone is generated onsite as needed. Ozonation besides produces fewer disinfection byproducts than chlorination. A disadvantage of ozone disinfection is the high cost of the ozone coevals equipment and the demands for particular operators. ODOUR CONTROL Smells emitted by sewerage intervention are typically an indicant of an anaerobic or ââ¬Å" infected â⬠status. Early phases of processing will be given to bring forth fetid gases, with H sulphide being most common in bring forthing ailments. Large procedure workss in urban countries will frequently handle the smells with C reactors, a contact media with bio-slimes, little doses of Cl, or go arounding fluids to biologically capture and metabolise the objectionable gases. Other methods of odour control exist, including add-on of Fe salts, H peroxide, Ca nitrate, etc. to pull off H sulphide degrees. Package Plants AND BATCH REACTORS To utilize less infinite, dainty hard waste and intermittent flows, a figure of designs of intercrossed intervention workss have been produced. Such workss frequently combine at least two phases of the three chief intervention phases into one combined phase. In the UK, where a big figure of effluent intervention workss serve little populations, bundle workss are a feasible option to constructing a big construction for each procedure phase. In the US, bundle workss are typically used in rural countries, main road remainder Michigans and dawdler Parkss. One type of system that combines secondary intervention and colony is the sequencing batch reactor ( SBR ) . Typically, activated sludge is assorted with natural entrance sewerage, and so assorted and aerated. The settled sludge is run away and re-aerated before a proportion is returned to the headworks. SBR workss are now being deployed in many parts of the universe. The disadvantage of the SBR procedure is that it requires a precise control of timing, blending and aeration. This preciseness is typically achieved with computing machine controls linked to detectors. Such a complex, delicate system is unsuited to topographic points where controls may be undependable, ill maintained, or where the power supply may be intermittent. Extended aeration bundle workss use separate basins for aeration and subsiding, and are slightly larger than SBR workss with decreased timing sensitiveness. Package workss may be referred to every bit high charged or low charged. This refers to the manner the biological burden is processed. In high charged systems, the biological phase is presented with a high organic burden and the combined floc and organic stuff is so oxygenated for a few hours before being charged once more with a new burden. In the low charged system the biological phase contains a low organic burden and is combined with flocculate for longer times. SLUDGE TREATMENT AND DISPOSAL The sludges accumulated in a effluent intervention procedure must be treated and disposed of in a safe and effectual mode. The intent of digestion is to cut down the sum of organic affair and the figure of disease-causing micro-organisms present in the solids. The most common intervention options include anaerobiotic digestion, aerophilic digestion, and composting. Incineration is besides used albeit to a much lesser grade. Sludge intervention depends on the sum of solids generated and other site-specific conditions. Composting is most frequently applied to small-scale workss with aerophilic digestion for mid sized operations, and anaerobiotic digestion for the larger-scale operations. ANAEROBIC DIGESTION Anaerobic digestion is a bacterial procedure that is carried out in the absence of O. The procedure can either be thermophilic digestion, in which sludge is fermented in armored combat vehicles at a temperature of 55Aà °C, or mesophilic, at a temperature of around 36Aà °C. Though leting shorter keeping clip ( and therefore smaller armored combat vehicles ) , thermophilic digestion is more expensive in footings of energy ingestion for heating the sludge. Anaerobic digestion is the most common ( mesophilic ) intervention of domestic sewerage in infected armored combat vehicles, which usually retain the sewerage from one twenty-four hours to two yearss, cut downing the BOD by approximately 35 to 40 per centum. This decrease can be increased with a combination of anaerobiotic and aerophilic intervention by put ining Aerobic Treatment Units ( ATUs ) in the infected armored combat vehicle. One major characteristic of anaerobiotic digestion is the production of biogas ( with the most utile constituent being methane ) , which can be used in generators for electricity production and/or in boilers for warming intents. AEROBIC DIGESTION Aerobic digestion is a bacterial procedure happening in the presence of O. Under aerophilic conditions, bacteriums quickly consume organic affair and change over it into C dioxide. The operating costs used to be characteristically much greater for aerophilic digestion because of the energy used by the blowers, pumps and motors needed to add O to the procedure. Aerobic digestion can besides be achieved by utilizing diffuser systems or jet aerators to oxidise the sludge. COMPOSTING Composting is besides an aerophilic procedure that involves blending the sludge with beginnings of C such as sawdust, straw or wood french friess. In the presence of O, bacterium digest both the effluent solids and the added C beginning and, in making so, produce a big sum of heat. Incineration Incineration of sludge is less common because of air emanations concerns and the auxiliary fuel ( typically natural gases or fuel oil ) required to fire the low calorific value sludge and zap residuary H2O. Stepped multiple fireplace incinerators with high abode clip and fluidized bed incinerators are the most common systems used to burn effluent sludge. Co-firing in municipal waste-to-energy workss is on occasion done, this option being less expensive presuming the installations already exist for solid waste and there is no demand for subsidiary fuel. Chapter THREE TERTIARY TREATMENT 3.1 SLUDGE DISPOSAL When a liquid sludge is produced, farther intervention may be required to do it suited for concluding disposal. Typically, sludges are thickened ( dewatered ) to cut down the volumes transported off-site for disposal. There is no procedure which wholly eliminates the demand to dispose of biosolids. There is, nevertheless, an extra measure some metropoliss are taking to superheat sludge and change over it into little pelletized granules that are high in N and other organic stuffs. In New York City, for illustration, several sewerage intervention workss have dewatering installations that use big extractors along with the add-on of chemicals such as polymer to farther take liquid from the sludge. The removed fluid, called centrate, is typically reintroduced into the effluent procedure. The merchandise which is left is called ââ¬Å" bar â⬠and that is picked up by companies which turn it into fertilizer pellets. This merchandise is so sold to local husbandmans and sod farms as a di rt amendment or fertiliser, cut downing the sum of infinite required to dispose of sludge in landfills. Much sludge arising from commercial or industrial countries is contaminated with toxic stuffs that are released into the cloacas from the industrial procedures. Elevated concentrations of such stuffs may do the sludge unsuitable for agricultural usage and it may so hold to be incinerated or disposed of to landfill. 3.2 TREATMENT IN THE RECEIVING ENVIRONMENT Many procedures in a effluent intervention works are designed to mime the natural intervention processes that occur in the environment, whether that environment is a natural H2O organic structure or the land. If non overloaded, bacteriums in the environment will devour organic contaminations, although this will cut down the degrees of O in the H2O and may significantly alter the overall ecology of the receiving H2O. Native bacterial populations feed on the organic contaminations, and the Numberss of disease-causing micro-organisms are reduced by natural environmental conditions such as predation or exposure to ultraviolet radiation. Consequently, in instances where the receiving environment provides a high degree of dilution, a high grade of effluent intervention may non be required. However, recent grounds has demonstrated that really low degrees of specific contaminations in effluent, including endocrines ( from animate being farming and residue from human hormonal contraceptive me thod methods ) and man-made stuffs such as phthalates that mimic endocrines in their action, can hold an unpredictable inauspicious impact on the natural biology and potentially on worlds if the H2O is re-used for imbibing H2O. [ 21 ] In the US and EU, uncontrolled discharges of effluent to the environment are non permitted under jurisprudence, and rigorous H2O quality demands are to be met. ( For demands in the US, see Clean Water Act. ) A important menace in the coming decennaries will be the increasing uncontrolled discharges of effluent within quickly developing states. 3.3 SEWAGE TREATMENT IN DEVELOPING COUNTRIES Few dependable figures on the portion of the effluent collected in cloacas that is being treated in the universe exist. In many developing states the majority of domestic and industrial effluent is discharged without any intervention or after primary intervention merely. In Latin America about 15 % of gathered effluent base on ballss through intervention workss ( with varying degrees of existent intervention ) . In Venezuela, a below mean state in South America with regard to wastewater intervention, 97 per centum of the state ââ¬Ës sewerage is discharged natural into the environment. In a comparatively developed Middle Eastern state such as Iran, Tehran ââ¬Ës bulk of population has wholly untreated sewerage injected to the metropolis ââ¬Ës groundwater. However now the building of major parts of the sewerage system, aggregation and intervention, in Tehran is about complete, and under development, due to be to the full completed by the terminal of 2012. In Israel, approximately 50 per centum of agricultural H2O use ( entire usage was 1 billion three-dimensional meters in 2008 ) is provided through reclaimed cloaca H2O. Future programs call for increased usage of treated cloaca H2O every bit good as more desalinization workss.
Tuesday, October 22, 2019
Demography - Statistical Study of Human Populations
Demography - Statistical Study of Human Populations Demography is the statistical study of human populations. It includes the study of the size, structure, and distributions of different populations and changes in them in response to birth, migration, aging, and death. It also includes the analysis of the relationships between economic, social, cultural, and biological process influencing a population. The field of sociology draws on huge bodies of data generated by a variety of sources, including the U.S. Census Bureau. Demography is widely used for various purposes and can encompass small, targeted populations or mass populations. Governments use demography for political observations, scientists use demography for research purposes, and businesses use demography for the purpose of advertising. Statistical concepts essential to demography include birth rate, death rate, infant mortality rate, fertility rate, and life expectancy. These concepts can be further broken down into more specific data, such as the ratio of men to women and the life expectancy of each gender. A census helps provide much of this information, in addition to vital statistic records. In some studies, the demography of an area is expanded to include education, income, the structure of the family unit, housing, race or ethnicity, and religion. The information gathered and studied for a demographic overview of a population depends on the party utilizing the information. From the census and vital statistics gathered using a wide variety of sources, sociologists can create a picture of the U.S. population ââ¬â who we are, how we are changing, and even who we will be in the future.
Monday, October 21, 2019
No Other Essays - Stonehenge, Henges, Free Essays, Term Papers
No Other Essays - Stonehenge, Henges, Free Essays, Term Papers No Other Despite the many purposes it seems to serve, Stonehenge is still the embodiment of mystery for most of the world. Some believe that its purpose was to be used as an astronomical observatory. Others think that it was used as a religious meeting center for the Druids. However, no one has been able to prove its true meaning and existence. Stonehenge is believed to have been built in three main periods. The first took place between 3100 and 2700 B. C. This part of the construction consisted of building a huge ditch around the area in which Stonehenge was to be built (Castleden 1). This ditch was 320 ft. in diameter with a broken area in which the entrance is located. Just inside the ditch 56 holes were dug equal distance from each other. These holes were then filled with chalk rubble, but some of the holes were filled with the bones of cremated human beings. These holes were called the Aubrey holes after their discoverer John Aubrey. To the northeast of the ditch a 16ft. tall heel stone was erected (Brown 751). The second phase of the building is non-existent to this day (Warwick and Trump I t can however be inferred by to holes known as the Q and R holes. The two holes form a double circle around the monument. It was originally filled with 38 blue stones. Also during this building phase two ditches were dug parallel to each other. The two ditches go outward from the entrance. This part of the building process is believed to be unfinished. This thought is due to the fact that some holes are missing in the double circles (Brown 751). The third phase in building is the most spectacular of all the phases. This is because of the 100ft. Circle that is filled with 30 sarsen stone columns which weighs 25 tons separately. A continuous circle of lintel stones held in place by mortise and tenon joints tops them off. Inside the circle is the holes known as the X and Y holes. Also inside are a small horseshoe shape of bluestones. The largest bluestone is called the altar stone. This altar stones original location and meaning is unknown. It now lies under two fallen trilithon stone. The builders of this age of Stonehenge are the Wessex culture of the early Bronze Age (Brown 752). Those who constructed Stonehenge may never be known. There are many myths and legends as to who really built the huge monument. On such myth is that the great magician Merlin built Stonehenge. This was claimed in the book History of the Kings of Britains written by Geoffrey of Monmouth. According to Geoffrey the huge stones were taken from Ireland and moved to England where they were marked as a burial ground for slain British princes. This monument was set up by King Ambrosius. He sent for Merlin to give him a monument. Merlin suggested the Dance of the Giants in Ireland. However the Irish were not going to give up their monument without a fight. They had set up an army to defend the giant monument from King Ambrosiuss army of soldiers sent to fetch the monument. The British defeated the Irish but could not budge the giant stones in any way, shape, or form. Merlin, however, could. He came to their rescue and moved the stones with the greatest of ease. This story was a good explanati on to all medieval believers. Outline I. Construction A. Phases 1. Period I 2. Period II 3. Period III B. Builders 1. Celts and Druids 2. Merlin and King Ambrossius II. Purpose A. Solstice Calendar B. Druids Meetings C. Astronomical Events III. Feeling toward Stonehenge A. Peoples Feelings Then B. Peoples Feelings now
Sunday, October 20, 2019
Definition and Examples of Inflectional Morphology
Definition and Examples of Inflectional Morphology Inflectional morphology isà the study of the processes (such as affixation and vowel change) that distinguish the forms of words in certain grammatical categories. In comparison to many other languages, the inflectional system of Modern English is fairly limited.à Inflectionalà morphology is customarily distinguished from derivational morphology (or word formation). As A.Y. Aikhenvald points out, Derivational morphology results in the creation of a new word with a new meaning. In contrast, inflectional morphology involves an obligatory grammatical specification characteristic of a word class (Typological Distinctions in Word-Formation in Language Typology and Syntactic Description, 2007). This distinction, however, is not always clear-cut. Examples and Observations Inflectional Categories and Derivational CatgeoriesThe prototypical inflectional categories include number, tense, person, case, gender, and others, all of which usually produce different forms of the same word rather than different words. Thus leaf and leaves, or write and writes, or run and ran are not given separate headwords in dictionaries. Derivational categories, in contrast, do form separate words, so that leaflet, writer, and rerun will figure as separate words in dictionaries. In addition, inflectional categories do not, in general, alter the basic meaning expressed by a word; they merely add specifications to a word or emphasize certain aspects of its meaning. Leaves, for instance, has the same basic meaning as leaf, but adds to this the specification of multiple exemplars of leaves. Derived words, by contrast, generally denote different concepts from their base: leaflet refers to different things from leaf, and the noun writer calls up a somewhat different concept from th e verb to write.That said, finding a watertight cross-linguistic definition of inflectional which will let us classify every morphological category as either inflectional or derivational is not easy. . . . [W]e define inflection as those categories of morphology that are regularly responsive to the grammatical environment in which they are expressed. Inflection differs from derivation in that derivation is a lexical matter in which choices are independent of the grammatical environment.ââ¬â¹(Balthasar Bickel and Johanna Nichols, Inflectional Morphology. Language Typology and Syntactic Description: Grammatical Categories and the Lexicon, 2nd ed., edited by Timothy Shopen. Cambridge University Press, 2007) Dictionaries and Inflectional Morphology[I]t is not correct to say that dictionaries never have anything to say about inflectional morphology. This is because there are two reasons why a word form such as pianists does not have to be listed, and these reasons are interdependent. The first is that, once we know that an English word is a noun denoting a kind of thing that can be counted (if the noun is pianist or cat, perhaps, but not astonishment or rice), then we can be confident that it will mean simply more than one X, whatever X may be. The second reason is that, unless otherwise specified, we can be confident that the plural form of any countable noun will be formed by adding to the singular form the suffix -s (or rather, the appropriate allomorph of this suffix); in other words, suffixing -s is the regular method of forming plurals.That qualification unless otherwise specified is crucial, however. Any native speaker of English, after a moments thought, should be able to think of at least two or three nouns that form their plural in some other way than by adding -s: for example, child has the plural form children, tooth has the plural teeth, and man has the plural men. The complete list of such nouns in English is not long, but it includes some that are extremely common. What this means for the dictionary entries for child, tooth, man and the others is that, although nothing has to be said about either the fact that these nouns possess a plural form or about what it means, something does have to be said about how the plural is formed.(Andrew Carstairs-McCarthy, An Introduction to English Morphology: Words and Their Structure. Edinburgh University Press, 2002) Eight Regular Morphological InflectionsThere are eight regular morphological inflections, or grammatically marked forms, that English words can take: plural, possessive, third-person singular present tense, past tense, present participle, past participle, comparative degree, and superlative degree. Most have phonologically sensitive realizations. . . .Modern English has relatively few morphological inflections in comparison with Old English or with other European languages. The inflections and word-class clues that do remain help the listener process incoming language.(Marianne Celce-Murcia, Donna M. Brinton, and Janet M. Goodwin, Teaching Pronunciation: A Reference for Teachers of English to Speakers of Other Languages. Cambridge University Press, 1996)Irregular Inflectional MorphologyThe so-called irregular inflectional morphology or morphological processes (such as internal vowel change or ablaut (sing, sang, sung)) today represent limited historical remnants of former grammatical inflectional systems which were probably semantically based and are now acquired lexically for frequently used lexical items rather than as grammatical systems (Tobin 1993:Ch. 12).ââ¬â¹(Yishai Tobin, Phonology as Human Behavior: Inflectional Systems in English. Advances in Functional Linguistics: Columbia School Beyond Its Origins, ed. by Joseph Davis, Radmila J. Gorup, and Nancy Stern. John Benjamins, 2006)
Saturday, October 19, 2019
Westar beverage Statistics Project Example | Topics and Well Written Essays - 250 words
Westar beverage - Statistics Project Example alysis corresponds to the hotelââ¬â¢s monthly sales for both pub and nightclub, sales for the club, sales for the pub, total expenditure for the hotel, expenditure for the nightclub, expenditure for the pub, and room occupancy in the hotel. Using excel, regression analysis generates the following tables with coefficients. From the regression statistics, the high value of adjusted R square indicates that the regression model explains a high percentage of the considered data, more than 95 %. The model can therefore be used to predict beverage sales. The lower significance value from the ANOVA table, 0 relative to 0.05, also indicates that there exist significant relationship between beverage sales and the other variables. Further, the table of coefficients confirms that significant relationship exists between beverage sales and sales for the pub and sales for the nightclub. The hotelââ¬â¢s volume of sales equally depends on its two branches, pub, and club. Research into forecasting should therefore be diversified to investigate factors affecting sales in the two branches of the
Friday, October 18, 2019
Nasa risk management Essay Example | Topics and Well Written Essays - 750 words
Nasa risk management - Essay Example Understanding the stakeholderââ¬â¢s expectations is primary as they can also opt to implement a constraint that will limit the performance of the organizations. Conducting a performance measurement is also imperative due to the expansion of research of realizing the risks involved, as well as the opportunities involved. The main weaknesses in the RIDM flowchart case study include the imposition of constraints that is not done by the organization directly, but rather by the stakeholders. The stakeholders can induce a very limited space for the organization to spur in its efforts to develop a higher level of success and great performance. Another weakness is in the assessment conducted through the second step whereby preliminary evaluations are conducted. This is because the results accrued are rather solidly understood as grounds for approval or disapproval. When the evaluation is conducted, the conditions may be more favorable then, and provide positive results that may not be achieved should the environmental conditions alter. The use of RIDM (risk- informed decision making) to determine the performance measures can be presented in a qualitative and quantitative format. The quantitative format presents this information in numerical characters and provides a mathematical volume analysis of the performance measures. It is highly differentiated from the qualitative format that rather presents information that does not have numerical values and is rather defined in ranking position terms. Some of the qualitative measures in RIDM include; technology readiness level, and it presents the information required without using any numerical values and constructs a qualitative scale the defines the ranking position of the performance measures. The main challenges that are accrued from utilizing the qualitative measures while defining the
Slavery in 19thcentury America vs. Arabia Research Paper
Slavery in 19thcentury America vs. Arabia - Research Paper Example As slaves begin to populate into countries such as modern day Arabia new lucrative of trading slaves became a common theme. The elite sought this opportunity to trade amongst themselves and business flourished. This become a focal point which facilitated the growth of imperialism. Conquest was crucial not only to supply labor force, but to also extend its boundaries. One of the biggest motivating points for slavery in the Arabian Peninsula was the economy itself that was most intriguing. The Arabian state was in the state of conquer where the influx of wealth enabled labor to thrive. With the ever-growing economy, it only made sense that the agriculture force needed to be amplified. At its peak, this part of the continent was flourishing from East to West as its border dominated the agriculture front. The Arabs needed to a labor force, for properties and landowners, who propagated the cause. This was especially true during the 19th century where the significance of breaking the Ottom an Empire was crucial. The enormous amount of wealth that was accumulated from the wars resulted in wealthy landowners. These landowners in essence also become politicians in the senate and pushed for the cause. Since citizenship was only granted to Arabs and elite status wealthy land owners, the slavers never got the level of citizenship. Hence, it was inevitable that slavery was already part of the lifestyle. Another interesting element about the Arabs slave trade was to execute gender and conquest. This was excruciating considering the fact that men were utilized impregnate conquered women. One of the major differences between slavery in in America was the fact that Americans were not trying to be imperialistic at this stage. Slavery was just another element that was embedded because of globalization that took place. The era of industrialization became a crucial factor that
Thursday, October 17, 2019
State Bank of India Essay Example | Topics and Well Written Essays - 2000 words
State Bank of India - Essay Example In fact, after five years of deliberations, the chairman reflected bankââ¬â¢s achievements on the attribute of positive attitude regained by leadership thought. This opened up avenues through which the chairman shifted the focus to start aiming at being among the top twenty banks in the world. With such deliberations, the concern is on how the bank has been performing, what contributed to its advancements, the challenges it met along the journey, the opportunities available, its current weaknesses, and the potential it has in order to go to higher horizons. In light with this, the following section will evaluate on the current bankââ¬â¢s situation. This will give an insight and overview of the potential that the bank has in terms of advancing or deteriorating (Samuelson 1980). SBI profile: the primary internal and external influences on State Bank of India One theory that can be put into the context of explaining the primary internal and external influences on state bank is the ory of planed behavior. This theory can be applicable in explaining why, for example, people have a perception the SBI is a good bank. It takes several strategic measures for the internal management of the bank to put incentives that change the view of customers in relation to services offered by the bank. In order for employees to be able to perform well in their duties, they need to have a good attitude towards both the organisation and the customers. In essence, theory of planned behavior argues that, the attitude toward a behavior changes individual behavioral intentions (Ajzen 2007). In this regard, due to good employee incentives offered by the bank, employees are able to have a positive attitude towards the bank, something that results in top performance. In addition, organisation and management theory argues that organisations must understand both internal and external factors in order to succeed in their business. This can be analyzed to be the case in SBI. For example, on his reflection of the journey, in 2011, the chairman admitted that the bank has been the largest commercial bank in India. According to the chairman, this has been a journey full of transformations, which focused on changing its hierarchy, transaction orientation, customer focus, government ownership, and change of technological advancement, which has made it to be a universal bank. After Bhatt took over its leadership, he talked of transforming the leadership of SBI in order to propel it further. By 2010, SBI had doubled its profits and regained market share, something that led to the bank being awarded the ââ¬Ëachievement awardââ¬â¢ for the strongest bank in the Asian pacific region. In this regard, it is apparent that the change of leadership exhibited by Bhatt was very instrumental in taking the bank to new levels (Rust and Zahorik 1993). Therefore, analytically, it can be argued that apart from adopting all necessary technology and other strategies in business, leadership plays an indispensable role in development of any organisation (Yeung, Ging and Ennew 2002). By 2011, SBI was 43rd largest bank in the world taking a capitalization of over $ 36.5 billion in. By that time, SBI had more than 267,000 employees and with 18,000 branches and 25,000 ATMs. In this year, it made profits of $ 2.6 billion. However, the journey of SBI has been a long one since its establishment in 1806. Some years down the line, the bank was granted the right to issue currency; something updated it into the status of a presidency bank. At that time, the bank was partly owned by the government and part by private individuals. One of the parties that have had influence on
Web based training management system Essay Example | Topics and Well Written Essays - 750 words
Web based training management system - Essay Example The continuous search for value in the business organizations aided by technological revolution has led to significant investment into the development of the most critical resource of the organizations, the human resource. There have been radical changes in the area of organizational training. LRH Manufacturing Inc. has also decided to use a Web Based Training Management System. The project is aimed at improving the deliverables of the training activity by way use of IT in rigorous planning, deployment, feedback, data compilation, review and improve aspects of training. The traditional classroom training in organizations is increasingly being replaced by web based training because of its user friendliness, low cost and amount of content it can offer to users. At the same time it is a change activity which is to be positioned as change in cultural aspect of the organizations.The key to success of the change is communication with the people who will be affected by the new training proj ect to gain their support. In line with the government regulation which stipulates Web Based Training Management. Key to success is creating awareness and managing project stakeholders' expectations to minimize resistance and gain the necessary support to make implementation of improvement solutions successful.Stakeholders are individuals and groups who have the ability to influence or are impacted by the direction and success of the project. In the project under discussion, the stakeholders in the case of LRH Manufacturing Inc. have been defined as all the managers and executives of all the key departments viz. Sales & Marketing, Customer Service, Finance, Human Resources, Information Technology, Office Management, Product Development Research and Manufacturing Distribution. A stakeholder analysis was carried to differentiate communication needs among the stakeholders. A project stakeholder map (1) was developed which involved steps like listing of stake holders, listing of impact of project, organizational importance and attitudinal response to the project. Accordingly two main distinct groups have emerged i.e. Core Functions and support function. The prevailing regulations are aimed at the requirement that the product which is in the medical care area is reliable, accurate and cost effective since it is used for human life. Accordingly product research and manufacturing distribution are taken as core function. As the project is about web training, human resource and IT have been clubbed with core functions. The support function is sales & marketing; finance and office management. Higher level of acceptance and involvement is a critical success factor especially among the core functions and not so critical for support function, the communication plan will be different for the two categories. The Project Communication Plan Communication is defined as, "The exchange of thoughts, messages, or information, as by speech, signals, or writing." (The American Heritage Dictionary of the English Language, Fourth Edition). This essentially means that communication associated with a project has a single focus - bringing or aligning different minds associated with the event / plan of the organization on to a platform of similar understanding on the issue to achieve collaboration and unidirectional response to the issue involved. The communication plan is divided into following elements: Content / Theme The content type has been developed by reviewing the goal of the project and its value addition to the organization. The information content contains relevant details which include the compelling need to change, impact of change on individuals and organization, the process of change, time schedules. The company vision and policy will be a part of the communication Mode The specific mode of communication for specific identified communication has been selected taking relevant factors in account. It is necessary that the communication target for change management is to be carried out by
Wednesday, October 16, 2019
School leadership. Is transformational leadership really effective in Essay
School leadership. Is transformational leadership really effective in schools - Essay Example While the former is predominantly an ââ¬Å"instructionalâ⬠style of leadership while a transformational approach tends to be more team based. In applying different models of leaders and various approaches to leadership, there has been a general consensus that school leadership differs from organizational leadership, hence a team based approach may be more suitable. School leadership essentially needs to combine leadership and management capabilities. Everard and Morris(1990) have laid out five stages of management, wherein setting goals, planning and organizing resources for the achievement of goals and implementing control and corrective procedures are important in achieving the desired objectives. In the context of transformational leadership styles, Bolman and Deal (1997) are of the view that ââ¬Å"Poorly managed organizations with strong, charismatic leaders may soar temporarily only to crash shortly thereafter.â⬠(Bolman and Deal,1997: xiii-xiv). In the international context, cultural implications may also need to be taken into consideration in determining what kind of leadership style would be relevant. On the basis of the above, the research question examined in this study is whether a transformational leadership style is really effective in schools?
Web based training management system Essay Example | Topics and Well Written Essays - 750 words
Web based training management system - Essay Example The continuous search for value in the business organizations aided by technological revolution has led to significant investment into the development of the most critical resource of the organizations, the human resource. There have been radical changes in the area of organizational training. LRH Manufacturing Inc. has also decided to use a Web Based Training Management System. The project is aimed at improving the deliverables of the training activity by way use of IT in rigorous planning, deployment, feedback, data compilation, review and improve aspects of training. The traditional classroom training in organizations is increasingly being replaced by web based training because of its user friendliness, low cost and amount of content it can offer to users. At the same time it is a change activity which is to be positioned as change in cultural aspect of the organizations.The key to success of the change is communication with the people who will be affected by the new training proj ect to gain their support. In line with the government regulation which stipulates Web Based Training Management. Key to success is creating awareness and managing project stakeholders' expectations to minimize resistance and gain the necessary support to make implementation of improvement solutions successful.Stakeholders are individuals and groups who have the ability to influence or are impacted by the direction and success of the project. In the project under discussion, the stakeholders in the case of LRH Manufacturing Inc. have been defined as all the managers and executives of all the key departments viz. Sales & Marketing, Customer Service, Finance, Human Resources, Information Technology, Office Management, Product Development Research and Manufacturing Distribution. A stakeholder analysis was carried to differentiate communication needs among the stakeholders. A project stakeholder map (1) was developed which involved steps like listing of stake holders, listing of impact of project, organizational importance and attitudinal response to the project. Accordingly two main distinct groups have emerged i.e. Core Functions and support function. The prevailing regulations are aimed at the requirement that the product which is in the medical care area is reliable, accurate and cost effective since it is used for human life. Accordingly product research and manufacturing distribution are taken as core function. As the project is about web training, human resource and IT have been clubbed with core functions. The support function is sales & marketing; finance and office management. Higher level of acceptance and involvement is a critical success factor especially among the core functions and not so critical for support function, the communication plan will be different for the two categories. The Project Communication Plan Communication is defined as, "The exchange of thoughts, messages, or information, as by speech, signals, or writing." (The American Heritage Dictionary of the English Language, Fourth Edition). This essentially means that communication associated with a project has a single focus - bringing or aligning different minds associated with the event / plan of the organization on to a platform of similar understanding on the issue to achieve collaboration and unidirectional response to the issue involved. The communication plan is divided into following elements: Content / Theme The content type has been developed by reviewing the goal of the project and its value addition to the organization. The information content contains relevant details which include the compelling need to change, impact of change on individuals and organization, the process of change, time schedules. The company vision and policy will be a part of the communication Mode The specific mode of communication for specific identified communication has been selected taking relevant factors in account. It is necessary that the communication target for change management is to be carried out by
Tuesday, October 15, 2019
Hollywoodââ¬â¢s Dilemma Essay Example for Free
Hollywoodââ¬â¢s Dilemma Essay After two decades of labor peace, Hollywood is now facing a major dilemma as movie and television writers embark on an industrywide strike. The walkout brought the first widespread shutdown of the entertainment industry since the 1988 writersââ¬â¢ strike which lasted five months and cost the industry more than $500 million. The call for strike resulted after more than three months of contentious negotiations between the Alliance of Motion Picture and Television Producers and the 12,000-member Writers Guild of America (WGA) whose contract expired last October 31. The dispute sparked after the writers demanded that they be given a bigger slice of DVD profits and revenue from the distribution of films and TV shows over the Internet. Producers however brushed off the writers requests, arguing that industry economics and still-shifting technology made accommodation impossible. The series of negotiations began as early as July with a demand by the producers that compensation for the new media be postponed until an industry group could study the matter. It also demanded that writers accept a radical restructuring of the residuals system, under which companies would make payments only after they had recouped the cost of movies and programs. Both demands were rejected by the writers. The producers then withdrew their demands but refused to grant the writersââ¬â¢ requests. Failures to come up with a compromise led to writersââ¬â¢ warning that would stage a strike if their demands would not be met. The writersââ¬â¢ guild drew up an aggressive set of strike rules that forbid members from working during the walkout. In response, producers published on their website a road map for writers who might want to invoke their rights under federal labor law to keep working during a strike. Other last-ditch talks occurred but these failed to avert the strike. The strike began after the failed negotiation talk on November 4. Writers in Los Angeles started picketing 14 studio locations in four-hour shifts from 9a. m. to 5p. m. On the other hand, 50 striking writers wore red strike T-shirts at Paramount Studioââ¬â¢s gate. In front of NBC studios at Rockefeller Center in New York, strikers used a giant rat to impersonate network executives and chanted, ââ¬Å"No Contract, No Shows. â⬠Unlike the 1988 writersââ¬â¢ strike which led to flourishing of reality television, cheaper production costs, and decent ratings for broadcast and cable networks, this yearââ¬â¢s strike seems to result to more negative effects to the entertainment industry. The first casualties are the late-night talk shows which depend primarily on current events. Also expected to feel the strikeââ¬â¢s impacts are the daytime television shows and soap operas which usually tape about a week in advance. Production of movies and primetime TV programs shall also be affected though the effects will not be immediate as most of the studios have stockpiled dozens of scripts which could last until early next year. The strike really has great implications not only in the entertainment industry but in the countryââ¬â¢s economy as well. It affects not only the 200,000 workers in the movie and television industry but other industries as well. It also threatens to affect the economy of Southern California. The entertainment industry contributes an estimated $30 billion annually, or about seven percent to the economy of Los Angeles County. The local tourist economy shall likewise be affected as there is a tendency that tourists who observe that the entertainment industry is shut down will conclude that the economy is also weakening. In conclusion, the two parties must give way to each otherââ¬â¢s demands and come into compromise for the sake of the industry itself and the national economy. After all, strikes or its any other forms are useless if none of the parties involved would find way to compromise. Works Cited Cieply, Michael. ââ¬Å"Hollywood Producers Drop a Key Demandâ⬠The New York Times. October 17, 2007 ââ¬Å"Hollywood Writers Strikeâ⬠Ohio. com. November 5, 2007 http://www. ohio. com/news/break_news
Monday, October 14, 2019
Fibonacci And The Golden Ratio Mathematics Essay
Fibonacci And The Golden Ratio Mathematics Essay Some aspects of mathematics can be dull and tedious from start to end, much of it however is intriguing and inspiring, when you truly see the beauty and the relevance. This is why I would like to bring to your attention the magic of the Fibonacci numbers. If you have ever looked at a sheet of paper and wondered Why do we use those dimensions? or looked at the leaf or an attractive plant and wondered Why can I never find a four leaved clover? then this may be of some interest. Many of these things are quite interconnected in a way you would not realise, and most of them are connected by the Fibonacci sequence. If I return to one of my original questions Why can I never find a four leaved clover? it seems reasonable, that if you can find 3 leaved clover and 5 leaved clover, you would be able to find the more symmetrical 4 leaved clover. Why then is it so rare to find one? If we look closely at other examples of nature, we can perhaps find the answer. If you were to search through your average garden, you would find the majority of flowers have 5 petals, many have 3 or 8 or more but if you look closely, you will always find more of certain numbers, compared to others. These numbers just so happen to be part of the Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 Although, why does nature choose these numbers over others? In addition, the connection between the real world and this sequence does not just end there; it can be found almost everywhere we look: spirals on a snail shell, the core of an apple, geometry, art, architecture, the stock market and even the human body. So what makes it so useful? Why is it so special? My project intends to answer these questions and along the way discover new applications and more examples. I will be delving into the mathematical concepts behind the nature we see every day, the regular objects we rely on, the human body and the stock market. I shall also investigate aspects of the golden ratio and how the Fibonacci sequence is related to this. The Fibonacci sequence is found by adding the previous term to the term before that. For example: 0, 1, 1, 2, ? 0 +1=1 1+1=2 1+2=3 and so on.. Overall equation for next term: a_(n+1)= a_n+ a_(n-1) This creates an infinite sequence of numbers and is known as a recursive sequence, as each number is a function of the previous two. Also, as the sequence progresses the ratio between each consecutive term seems to converge upon a single number. 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 2/1=2 3/2=1.5 5/3=1.667 8/5=1.6 13/8=1.625 21/13=1.615 F=1.618034 Eventually, it converges to 1.618034 This number has a specific interest to many mathematicians and is known as the golden ratio. It is also useful when we consider where it is found. If you were to take your hand and bend the index finger as full as possible, measuring the dimensions of the rectangle created, you would find what is known as a golden rectangle. The average height (of the intermediate phalange) would be around 3cm and the average length (of the proximal phalange) would be 5cm. As we can see from left this creates a shape of ratio 5:3 or simply 1.667:1 (the golden ratio). This is only one of the many examples of golden ratio in the body. There are many, many more some of which have been known for hundreds of years (see Da Vinci s Vitruvian man right). Also, the golden ratio is not just confined to the human body. Rather than cutting and apple from pole to pole, if you were to slice in a horizontal fashion, you would find a simple five pointed star. However, it is much more complex than meets the eye. If you were to take the distance AB as 1 unit, the distance AC would be 1.618, the golden ratio. But why does this happen, what make this ratio so efficient and so appealing, and why has nature adopted it? History of the Sequence and Ratio From the start of the Palaeozoic era, 400 million years ago, animals of divine proportions have been roaming the earth. The most notable is the nautilus shell (right) which follows a logarithmic spiral based on the golden ratio in rectangles. The earliest written documentation of a special ratio belongs to the Rhind papyrus. A scroll about 6 metres long and 1/3 of a metre wide, it is one of the first mathematical handbooks. It was discovered by Scottish Egyptologist Henry Rhind in 1858 and is believed to have been written by Egyptian scribe, Ahmes in 1650 BC. He is believed to have copied it, from a document 200 years older, dating the first notation of the sequence to 1850 BC. However, the pyramids, built 1000 years previous, show many examples of the use of golden ratio, although many scholars believe it is merely coincidence created by the need for right angles. Between the 6th and 3rd centuries, Greek philosophers, mathematicians and artists used and analysed the golden ratio. It is visible in pentagons and pentagrams throughout the period and was attributed to Pythagoras and his followers. It was used as part of his symbol (a pentagram with a pentagon within) and it was he, who first suspected the proportion was the basis of the human figure. Plato also studied the ratio naming it most blinding of mathematical relations, the key to the physics of the cosmos. and from his lectures so did Eudoxus, whose work was used by Euclid in his book of elements II. Here he writes one of the first definitions A straight line is said to have been cut in extreme and mean ratio when, as the whole line is to the greater segment, so is the greater to the less. During his work he creates problems based on the ratio in pentagons, equilateral triangles and some of his prepositions show the ratio to be an irrational number. The first person to apply numbers and sequence to construct the golden ratio was Leonardo of Pisa (full name, Leonardo Pisano Bigollo, lived 1180-1250). He was the son of an Italian businessman from the city of Pisa and grew up within a trading colony in North Africa. At the time, Italy and the majority of Europe was using the Roman numeral system of counting, this was quite complex and meant most calculations required an abacus. While growing up in Algeria he learned the Hindu-Arabic system of calculation (the familiar 0, 1, 2). After returning to Pisa as a young man in the thirteenth century, he recognised the superiority of this new structure and began to spread it throughout Europe. He did this through his book the Liber Abaci (book of abacus) published in 1202 under the nickname, Fibonacci (a contraction of filius Bonacci, meaning son of Bonacci). To explain the system he used the Fibonacci sequence in his famous immortal rabbits problem (see next section of more detail). This allowed him to explain addition, subtraction and division using the Hindu- Arabic system and in turn allowed him to popularise it through Western Europe. Due to this he was later known as the founder of western mathematics and the greatest European mathematician of the middle ages. He introduced concepts such as algebra, geometry, the common fraction and even the square root symbol. He also considered the possibility of negative numbers and related it to merchant problems which began with a debt. There was very little significant work done upon the topic until 1509, when Luca Pacioli published De Divina Proportione with the help of illustrations by Leonardo Da Vinci, who later used this within his famous work the Vitruvian man . In 1611, German astronomer Johann Kepler discovered the numbers within his own work on planetary motion saying as 5 is to 8, so is 8 to 13, practically, and as 8 is to 13, so is 13 to 21 almost in relation to the rings around Saturn. It was later found that the ratio of mean distance between planets was in fact the golden ratio. Over the next two centuries many scholars investigated the sequence, deriving formulas and functions. In 1830, A. Braun first applied the sequence to the arrangement of bracts on a pinecone. A decade later and J.P.M. Binet derived a formula for the value of any Fibonacci number without the need for the previous two. nth number= 1/(v5) ((1+v5)/2)^n- 1/(v5) ((1-v5)/2)^n In 1920, Oxford Botanist A.H Church discovered spirals on sunflower heads corresponded to the numbers in Fibonacci s rabbit problem (see next section). This discovery inspired botanists to look for Fibonacci numbers elsewhere, teams then began to realise that many phyllotactic ratio s are golden ratio s (see flower patterns and primorda). In the 1930 s, Joseph Schillinger consciously composed a piece of music using Fibonacci intervals and Ralph Elliot began predicting the stock market in Fibonacci periods. By the 1960 s, a lively interest had been aroused and to this day mathematicians around the world are investigating the uses and problems connected with the sequence. The Immortal Rabbits Problem To explain his mathematical theorems, Fibonacci liked to create problems to allow his audience to use the maths he tried to describe. The immortal rabbits problem is one such challenge. It was first described within his famous Liber abaci and was later adopted as an explanation for the Fibonacci sequence. Imagine if you will a large enclosure and within it a pair of rabbits. The immortal rabbit problem asks if there is one pair to begin with, how many rabbits will there be after a certain length of time if: Each rabbit is immortal They stay within their pairs They breed once per month and produce a pair each time Each new pair takes 1 month to mature, and then breeds to form a new pair the next month January, we start with 2 rabbits, these then take one month to breed.. February, there is now one adult pair and a new born pair of immature rabbits. March, the new born pair have now matured, and the adult pair have reproduced April, the new born pair from March have now developed, the first pair reproduce again and the second pair reproduce for the first time.. The pattern continues until Month Pairs of mature rabbits Pairs of immature rabbits Overall Number of Pairs January 1 0 1 February 1 1 2 March 2 1 3 April 3 2 5 May 5 3 8 June 8 5 13 July 13 8 21 August 21 13 34 September 34 21 55 October 55 34 89 November 89 55 144 December 144 89 233 After a while, we begin to notice a pattern, the total number of rabbits in any given month is a Fibonacci number. This is because the total is formed from the number of immature rabbits (the same as the number of mature rabbits the last month) and the number of mature rabbits (the total from the previous month) i.e. a_(n+1)= a_n+ a_(n-1) Another interesting note is the rate of growth in the population. 2/1 = 2 3/2= 1.5 5/3= 1.666 8/3= 1.625 . this continues until we reach a_(n+1)/a_n =1.618034.. i.e. the Golden Ratio. Flower patterns and primorda As we have seen in the introduction, nature has applied the Fibonacci sequence and golden ratio from the number of petals on a flower, to the core of an apple and the spirals of a sunflower. On the face of it, this seems to be a fortunate and appealing coincidence, but since the 1920 s botanist have searched and found more and more of these coincidences . This leads us to believe that perhaps, they have a much deeper and more interesting meaning for the life of your average plant. Maybe these numbers and ratios were chosen for a reason. Even from Egyptian times it was noted that most flowers had 5 petals, the rest by majority also have Fibonacci numbers of petals. Also, if you examine the many plant stems you will find the regular pattern or 1, 2, 3, 5, 8 stems at standard heights. Another interesting phenomenon, and one which may reveal the mystery of why plants behave so regularly in conjunction with the Fibonacci sequence, are the spirals shown by plants. Look carefully at the picture of the pineapple left. As you move from the top right to the bottom left you may begin to see a set of spirals, curving round the pineapple in a diagonal fashion. Upon closer inspection you may also find a similar on from top left to bottom right and less obvious, from top to bottom. If we count the number of spirals we (fortunately for this topic) seem to find only Fibonacci numbers. In fact in a study of over 2000 pineapples not a single on differed from the pattern. The same principle applies to the pinecone. Upon close inspection, you will find two different spirals, one vertically and another horizontally, all of which come in Fibonacci numbers. A separate study to that of the pineapples showed that this was the case 99% of the time. The sunflower however, has its own unique spiral display. Starting from the centre and continuing in a clockwise fashion to the outside, the number of spirals again adds to a Fibonacci number. Although, if you look in the opposite (anticlockwise) direction you will find yet another spiral and adding the number of these gives the consecutive Fibonacci number. The majority of the time this is the case, however from time to time there are variations; with larger sunflowers the number of spirals can be double Fibonacci numbers (i.e. 2, 4, 6, 10, 16, 26.). These spirals may be interesting and attractive to look at, but hold much more value than just aesthetics; they allow us to show just why Fibonacci numbers are so widely used in nature and give us an insight into how nature uses maths at its very core. To understand the maths behind the growth of plants we must look deep into the way it grows. As the plant grows taller the interesting components (i.e. petals, sepals, stamens, leaves) all grow from small clumps of tissue called primorda. As these begin to grow they aim to have the largest distance between leaves as possible, this means they have the maximum amount of space and light to grow, ultimately making the plant stronger and more likely to survive. This distance has been decided through evolution to allow the maximum about of light to hit the plant and it turns out this maximum point of efficiently is related to the golden ratio. It just so happens that the Golden angle is the angle one golden ratio away from the starting position. 360 1.618.. 582.5 i.e. 582.5 -360 = 222.5 away clockwise (or 137.5 anticlockwise). As they grow at their angles the leaves have enough light and space to grow. However, when the 6th leaf begin to grow the angle means it is only 32.5 from the first, this leaves it in the shade meaning it is less likely to grow and develop; this is the reason many plants use the number 5 in some areas (i.e. in the number of petals) as the 6th would have less room and is less likely to grow. Sometimes called the phyllotactic ratio, the connection between this and efficiency in plants does not just end there. If we take ourselves back to the sunflower and its spirals we can see that this also has connections to the same ratio. As it begins to grown from the centre outwards each primorda (and therefore each seed head) grows on golden angle away from the previous. As the ratios between consecutive Fibonacci numbers are approximations to the golden ratio (and therefore used to create approximations to the golden angle) we begin to see them within the spirals. This is the main reason Fibonacci numbers are present in so many places; they form the best approximations of the golden ratio. Although, the actual number of spirals that arises depends upon the size of the seed head and slight variations in the rate at which the primorda migrate away from the tip of the growing shoot. As we saw from the rotations in plant leaves above, the golden angle is used to give the most space and therefore the most light. In the seed head however this is not a problem so why has evolution adapted to use it? The answer to this was first discovered by Professor H. Vogel in 1979. He noticed that using the golden angle allowed the seed head to pack together with hardly any missing space. This meant it was very efficient as more seeds could fit in a small area and also much stronger. In turn it meant there would be more seeds and better chance of offspring. This was later supported by French physicists Yves Couder and Stephan Douady, who found the choice of angle the natural consequence of the dynamics of growing a plant shoot . They stated that each primorda gets pushed into the largest available space, so they pack more efficiently, making the golden angle the most likely choice. They also discovered that the next best choice for packing an angle created by a second very similar sequence called the anomalous series (4, 7, 11, 18, 29). After inspection of more spirals and more plant this was found to be the 2nd most common choice after the Fibonacci sequence. Overall, nature has evolved and adapted to use Fibonacci numbers and the golden ratio they approximate, as it gives the most efficient method for survival. Over the years this had been pondered by many people and its frequency in nature has been described as many to be proof of intelligent design and higher power . Shapes of the Golden ratio Although undeniably stunning, the sources of the golden ratio and Fibonacci numbers in nature are only half the applications of these phenomena in the real world. As humans, along with the rest of nature, are hotwired to apply the golden proportions, some of the human applications are some of the most remarkable. As a species we are attracted to the shapes they make and therefore adapt it to the structures we built, the way we think and the art we create. One of the most common shapes is that of the golden rectangle. It is formed from a ratio of length to width of 1.168 : 1 (i.e. the golden ratio). This alone is not that interesting, but remove a square with the same width and height as the width of the golden rectangle (a square ratio 1:1) and you are left with another rectangle. If you take the measurements of this you once again find the ratio 1.168 : 1 the golden rectangle. Repeat the process and the same happens again and again and again; removing a square ratio 1:1 leaves a smaller golden rectangle. The pattern continues indefinitely and is known in mathematics as a fractal (a geometric pattern that is repeated at every scale). Look at most regular paper sizes, credit cards and company logo s you will find an abundance of golden rectangles. However its man-made applications are not its only uses, it can be applied to create another, much more stunning shape the logarithmic spiral. Visually, it can be described as a long, slow spiral and is known as a logarithmic or equiangular spiral. It is known as this as each radii from the centre intercepts the curve at exactly the same angle. It is created by constructing an arc from the furthest corner of each square in the golden rectangle to the opposing corner of that square. The pattern continues and repeats the further you zoom toward the centre making this yet another Fibonacci fractal. The most stunning example of this is the chambered nautilus (see the image of its shell right). As it grows it must produce more room within its shell, while keeping its original shape. To do this it adds a chamber larger than its previous, with each radii intercepting the curve at the same angle (remaining equiangular), keeping the original shape. There are also numerous other examples including; a rams horn, a galaxy spiral, a sea horse and many more. Last but not least, the pentagon and pentagram are found to have Fibonacci connections. These shapes have interested humans for many years and have been the insignia of many religious and political groups. The explanation for its popularity however lies with our desire to search for the golden ratio. From the diagram (left), we can see how the ratio 1:F connects the length of the side of the pentagon to the distance between corners of the pentagram. There is however another ratio, the distance between a vertex and the corner of the inscribed pentagon is 1: 1/F. These ratios mean that many pentagons in nature, art and architecture have Fibonacci numbers present in the lengths. Overall, we can see how many of the regular shapes found both in nature and modern life have been dictated by the Fibonacci sequence. There are thousands of examples of these proportions in the real world and more regular shapes than have been divulged here. As interesting as finding them in the real world is, it doesn t come close the intrigue which lies behind the way we can use them to our own advantage. Art and Architecture It is said that renaissance art was inspired by a sense of beauty and proportion . It seems fitting therefore that the dimensions for such art would lie in the ratio s and sequences of the most elaborate and efficient set of numbers known to maths. The use of the series in art has however been known long before this period with Luca Pacioli stating without mathematics there is no art upon the completion of his work with Leonardo Da Vinci on De Divina Proportione (you may recall this from History of the Sequence). Legend also has it that long before this, Greek mathematician Eudoxus studied human affinity to this proportion by asking a group of his followers to divide sticks into the ratios they found most pleasing. This experiment was later adapted by German psychologist, Gustav Fechner in the 1860 s. He took a series of ten rectangles of different proportion and asked subjects to choose which they found to be the most pleasing, 76% of all participants chose the three rectangles closest to the golden rectangle. It is clear from this then that we have known for many years that the golden or divine proportion has visually pleasing qualities and unknown to us, it can be found almost everywhere we look as a direct result. One of the earliest and most obvious sightings of this was in the Great Pyramids of 4700BC. Here F is found extensively in its construction but most scholars now believe that this is more coincidence than design, it is however interesting to note that the exact height of the structure is 5813 inches (numbers of the Fibonacci sequence. 1,400 years later and the Tomb of Ramses IV was built, this was later discovered to have several approximations to the golden rectangle as its centre. It had been constructed with a double square (approximation to the golden rectangle, a golden rectangle and a double golden rectangle. The first people to consciously apply the maths of the golden ratio to their art and architecture were the Greeks. The Parthenon of Greece 440BC is the single finest example of this. The whole structure fits within the golden rectangle proportions as well as each pair of columns and even the sections of sculpture that run above the columns. The designer, Phidias was said to be the greatest and most prolific sculptor of his age. His work was dependent upon extensive use of the golden proportion. Its abundance in his work later meant the ratio was named Phi in his honour. Many artefacts of the era from urns and vases to Afroditas sculpture (right) and temples all extensively used the proportion. It is believed that as Pythagoras linked it to the human body (see next section) it was generally associated with the divine and beautiful, making many associate it with the Gods and good. One of the most interesting instances of the Fibonacci sequence at work is in the operation of the stock market.
Subscribe to:
Posts (Atom)