Water Pumping System For Rural Applicatio Engineering Essay

Water Pumping System For Rural Applicatio Engineering Essay Water accessibility is more significant in present days .U.N i.e.[united nation ] estimate it will take nearly further than $90 billion in order to meet the current world deficits for clean water alone in 1980s Decade for water moving forward in 1990s it was clear that even with huge amount of money needs of water of tens of millions of citizens will not be meet by the end of Decade . although problems in delivering water has identified for so many years . reasonable and easiest way is to divert rainfall i.e. water due to rain by a gravity flow structure to the required site this process is not available in the world at least not on a regular or request basis . which is not achievable . General process for many years .manual pumping is been used even though this pump need regular maintenance and it should be attended. Their use is crucial to supply water. Throughout the world particularly for human consumption . This process is been selected by the U.N as the primary process in order to improve the supply of water. Pumping water from deep wells or moving water in large volume is not done very effectively by hand pump. It requires the use of mechanical powered pump .which is powered by engines or electric motor .powered engine systems are supplying water to big communities all over the world. Infrastructure of these big communities can supply fuel and maintenance required by the engine. Solar powered system or process is also available in large amount in the world. Which is powered by P.V i.e.[photovoltaic ] array or by wind generators . Photovoltaic system has established high reliability and lesser price as compare to another method in a huge ground of application. This report is about photovoltaic power pumping system in which it includes its installation including its simplicity of procurement and the required maintenance. Which explain about their rising reputation it is useful for intermediate application for agriculture requirement and in small villages. This report gives a methodology in choosing the finest system design for a particular purpose regularly a mixture of techniques can significantly reduce price and advance the dependability of a pumping system or make available of a flexible design in order to face a large range of application. ADVANTAGES AND DISADVANTAGES OF SOLAR POWER Advantages The use of photovoltaic in solar systems accounts for long life expectancy of the system (more than 20 years). Solar facilities operated with little maintenance or intervention after initial setup. Solar power is pollution free. Solar electric generation is economically competitive where grid connection or fuel transportation is difficult, costly or impossible e.g satellites, remote locations, ocean vessels etc. Disadvantages P.V cells produce d.c which must be converted to A.C before using with A.C appliances To get enough energy for applications, a larger number of P.V cells are needed. This increases the cost. Solar cells are expensive, and require a large initial capital when purchasing. Two typical ways of using solar water pump are as follow: Using a battery by charging it with solar photovoltaic panel and with the help of that pump running the pump. Direct connecting between pump and the solar photovoltaic panel. Both this method also have their drawbacks which are as follow: Making use of batteries by charging it by solar pump and than using it to run the pump that mean we have to use two batteries while one is running at that time other one will be charging which makes it more costly. If we are connecting solar panel directly to the pump than the water will be pump only during the sun glowing. Introduction: The aim of this study work is to construct a solar based DC water pump which would be used in rural and isolated zones. There are ample amount of villages and towns who do not have the privilege of possessing electric current supplies in their respective areas. By taking a look at the current scenario of our present economic choric. The solar water pumping system would be a benefited boon to the people. It not only saves the electricity but also in turn saves the wealth i.e. the capital. It is only easily available in the market but can be constructed as well. The development of the human kind has derived n number of methods of developing a water pump. The different sources of power used by people as a form of energy are as follow: Human energy [man power]. Animal power [cows, ox to pull out water]. Hydro power [at water dames and water bund]. Wind power [solar water heater, solar cooker, etc]. Fuels such as diesel for small generator. The most common pumps used in the rural and isolated communities are hand pumps, borehole pump which are driven by fuel such as diesel, electric submersible pumps which are run by diesel generator last but not the least solar pump Following are the different types of pumps with their advantages and disadvantages Advantage Disadvantage Hand pump Can be easily manufactured locally Easy maintenance Less capital cost Fuel cost zero Trouncing of human efficiency Repeated and unproductive use of borehole Flow rates are minimal Animal power Prevailing than humans Subordinate remuneration than human power Dung used as cooking fuel Constant food requirement to be met for animal Regularly abstracted to other actions at critical irrigation periods Hydraulic pump No supervision required Fuel cost zero Effortless to preserve Stumpy expenditure Long life Lofty consistency Involve precise location settings Low output Wind pump No fuel required Easily manufactured locally Long life No supervision required Effortless to preserve Water has to be stored due to the scarcity of wind High project planning and system design needed Difficult to install Solar P.V Zero fuel cost Long life [20 years approx] Easily manufacture locally Minimum maintenance Can be easily installed No supervision required Water has to be cloudy stored for cloudy period Often undergoes repairing [skilled technicians required] Diesel gasoline pump Easily installed Minimal capital cost Used worldwide It is portable Fuel is expansive High maintenance Short life Result in noise fume pollution Aim: Is to construct a solar water pump constituting P.V array .which would convert solar energy in to electrical energy as direct current [DC]. Application of solar water pumps: Water supply for rural and isolated areas. Livestock watering. Irrigation. Village and water supply is very dominating. Though there is a very high demand of water storage for the period of low solar radiation during rainy season this demands can be met by rain water harvesting .the main application of solar water pumping are for livestock watering mainly in the U.S and Australia .village water system and livestock watering are used in Africa where as solar water pumping for irrigation are mainly used in countries like India and china where expositor of sun are very good. Technology: P.V pumps constituents of the following components the P.V array converts solar energy directly in to electricity as direct current [DC] .the pump is driven by an electric motor. All the different characteristic of these components ought to be matched to get the efficient result the pump motor unit has its own optimum speed and load depending on the type and the size of the pump. Motor: Two types of motor is being able to use such as DC motor or the AC motor .inverter is required if we are using AC motor .which exist more broadly .inverters have become low cost and are well organized. Electronic controller frequency -variable inverter is used mainly in solar pumping system. By which panel and the pump linking can be optimise in order to maintain and due to the method or the system is fewer proficient batteries are also required for a usual AC motor system . The permanent magnet motor is generally proficient for a DC motor and CD motors might contain carbon brushes .when the brushed DC motor is being made into use than in order to change brushes [roughly around every two years] equipment required to pull out of the well. design without brushes are present in which as a replacement for commentators along with brushes electric circuits is use. The design without brush of DC motors needed electronic commutation which is being well liked in solar pumping system. Pump: Presently are few type of different pump are in the bazaar which include. Piston pump: in this pump before the output piston movement of the pump draw water in a assembly room i.e.[compartment]. Thread screw pump: in this pump water capsule is focused next to the screw in axial way. Starting from the opening to the way out for example [cavity progressive pump, rotor helical pump, and mono pump]. Centrifugal pump: in this pump impeller drive water for the exit with high revolving pace more or less near the border of the pump. In the middle of impeller situates an inlet from where the water is drawn. Following are the system configuration and the pumps option: Positive displacement helical pumps: Similar specs of water relief head as well as volume pressure positive displacement helical pump contains most excellent effectiveness with the least P.V panel. Their rotational speed is short. Inside a rubber covering a metallic helical rotor rotate .which is fit designed for greater head .during cloudy season mono solar pump is time consuming but due to its lowest speed water flow is continues not like centrifugal pump. Submerged pump with motor mounted on the surface: Benefit for this type of pump is Motor maintenance can be easily accessible Power victims ( losses) is shortly effected in shaft bearings Installation prise of the pump is high which is its disadvantage for which it is mostly replaced by submersible pump set as well as the motor Floating pump set motor: Due to its flexibility of floating .it is perfectly used in irrigation purpose of pumping water from canals as well as the well it is easily movable and there is a minor possibility of the pump operating dry. Majority of this pump sets apply solo step submerged centrifugal pump. Majority of this type contain DC motor without brush frequently with solar array hold. Like wheel barrow or handle. Like troll to permit transport SURFACE SUCTION PUMPS: Surface suction pumps set is moreover appropriate in short head application because of its export system. It requires presence of operator for the purpose of its security as well as its maintanence. In order to have additional than 8 suction head is not possible . fever ordinary solar power pumps along with PV motorized reciprocating piston pumps or thermo phones as thermal solar pump are present which are not used commercially. SUBMERSIBLE PUMP: Pump with electronic load controller can be flooded with load controller above the earth or surface. It can be easily installed with lay flat pipe work and motor pump is positioned if flooded away from potential harm. MULTISTAGE CENTRIFUGAL PUMP: It can be switched on at low torque. With no electronic controller can be synchronized with the solar array it is not well organised as positive dislocation pumps with low cost electronic load controllers useful for short heads. Selection of the pump: Photovoltaic pumps contain their influence rate as well as flow rate in order to design a P.V pump structure .following are the most important factors. Current voltage requirement of the pump. Tallness of the storage reservoir i.e.[tank] as well as the deepness of the water resource. Mechanical job completed via the pump. Required flow rate. Price of the structure. The following are the points that are measured for additional complicated design: Tube i.e.[pipe line] force allowness. Temperature of the water. Heat as well as electric loss. Quality of the pump. The above points are not always needed in order to design complicated P.V pumps. It is required to realize the principal of water pumping. Following equation is used in order to verify flow rate conversion. /h= /d Where : p[ /h] = meter cub per hour. [ /d] = meter cub per day. Standard equal hour of solar power i.e.[sun energy] received for each day is equal to the peak sun hours which vary according to the site and the time of year. ( /m), ( /m), (l/m), ( /s) this are the other unite which are used to measure flow rate of pump structure . Where: Usg/m = U.S gallon per minute. Lg/m = imperial gallon per minute. L/m = litre per minute. Kg/s = kilogram per second. Understanding the principle of photovoltaic process: The working principal of photovoltaic irrigation system is quite straight forward. A photovoltaic array is the source of electricity for driving a surface motor pump. Which basically pumps out water from well reservoir into a accumulating basin. The P.V array contain 20 modules and each v trough module [ 50 watt peak] is made up of 36 square single silicon solar cells the pumping subsystem constitute of an MPPT [maximum power point tracker] and a motor pump. The components of motor pump are DC motor [746 watt] unswervingly attached to a surface centrifugal pump. Photovoltaic pumping system efficiencies: Total efficiency of photovoltaic pumping system is defined as the product of efficiencies of the P.V array the pumping sub system . Where = P.V efficiency It is the ratio between operating electrical power and the incident radiation on the tilted surface of a photovoltaic module. Where: = operating electrical power of the system [w] G = global radiance on P.V array [w/ ] M = no of modules is parallel in P.V array = pumping sub system efficiency is defined as the ratio between the output hydraulic power required for lifting a volume of water and the input electrical power of subsystem. Where Q = water flow rate [m] = total dynamic head

Elie Wiesels Night: Reaction Paper :: essays research papers

Night Reaction Paper #1 p. 78 This is the scene where Elie is in the hospital part of the camp because of the operation that he has just had done to his foot. After Elie and his father decide to stay, leave the hospital, and be evacuated with the rest of the camp, he explains how he found out that the Russians liberated the rest of the people in the hospital two days after the evacuation. This part absolutely floored me because I couldn’t imagine first, making that big a decision, and secondly, finding out that the decision changed the course of your life forever was a huge shocker. I couldn’t even imagine finding that out and not being frustrated with myself. #2 p. 87 This is the part of the book where Rabbi Eliahou is looking for his son. He asks Elie if he has seen him, and Elie suddenly remembers that he did see him, and that he was in fact trying to lose his father in the midst of everyone running because he had become too much of a burden. This scene really affected me because I thought that it was horrible the way that a son would give up on his father and completely throw away the relationship that he has with him because of the conditions that they were going through. Since I have such a valued relationship with my mother, I could never imagine leaving her like that, but I guess that everyone changes drastically after being put through the torture that these people went through. #3 p. 94 This is the scene where the S.S. comes into the cattle cars and orders that the Jews throw out all of the dead. After they rob the dead men of their clothes, they see Elie’s father. Some of the men try to throw him outside, even though he isn’t dead yet, but only Elie knows that. After arguing with the men, Elie shows the men that his father is breathing weakly and is still alive. I couldn’t ever imagine having to fight with someone to save my mother when she was still alive. In that situation, I think I would have just broken down a long time ago. I don’t think that I could have lasted as long as Elie did in the camps.

Puritanism in American Literature

Puritanism in American Literature The Puritans had a large influence in American literature and still influence moral judgment and religious beliefs in the United States to this day. Puritan writing was used to glorify God and to relate God more directly to our world. Puritan literature was commonly a realistic approach to life. â€Å"Puritanism as a historical phenomenon and as a living presence in American life has enriched American literature in ways far too numerous to detail here. † (G. Perkins B. Perkins Phillip Leininger 888) Puritanism is a collection of many different religious and political beliefs. Common styles of Puritan writing are protestant, Calvinist, purposiveness, and the writings also directly reflected the character of the readers who were literate and strongly religious. Pragmaticism and both political and religious Idealism are frequently themes in Puritan literature. Puritanism thus laid the basis for Americanism. It did so on the basis not of philosophical or legal argument, but of Christian belief based on the Bible. Gelernter 25)The Calvinist ideology, which was popular in Puritanism was based off of the Five Points, which are total depravity, unconditional election, limited atonement, irresistible grace, and the perseverance of the â€Å"saints. † Total depravity is the idea that all humans are born sinful. Unconditional election means that God chooses who he wants to save and also contains the concept of predestination, which is an ideology that God damns certain individuals for the salvation of others. This also ties in with limited atonement, the ideology that Jesus only died for a selected group of individuals, not for everyone. The ideology of irresistible grace is that â€Å"the saving and transfiguring power of God,† cannot be either earned or denied. Perseverance of the â€Å"saints† is the ideological belief that elected individuals have the power to interpret the will of God and to live in an upright fashion. The Puritans had secular concerns as well as religious. Puritans believed in working hard, and doing selfless things to help others. Puritans also believed in typology, the belief that God's intentions are present in human action and in natural phenomenon. Failures to understand these intentions are human limitations. (â€Å"American Puritanism: A Brief Introduction†) In 1620, William Bradford formed the Plymouth Plantation with a group of Europeans that came with him to America. In only a year, their number of survivors decreased by half. Bradford kept a journal that chronicled the first 30 years of Plymouth Colony. Plain speech was the high literary value of this society, as expressed by William Bradford, who enjoined â€Å"a plain style, with singular regard to the simple truth in all things. (â€Å"The Influence of Puritanism on American Literature†) In this journal, he exhibited diplomacy and integrity, the ability to assure the colony’s survival, and made a contribution in avoiding potential disasters. His principles established religious freedom and self-government that later shaped American colonial government. John Winthrop wrote A Modell of Christian Charity either before he crossed into America in 1630 or along his journey to the New World. In this book, the struggles that were to be faced in the New World are discussed along with Winthrop’s ideas and plan’s to overcome them. Winthrop was considered to be a contributor to the concept of American exceptionalism, the idea that the New World is unique to other countries by ideology based on laissez-faire and egalitarianism along with liberty. Winthrop has also portrayed that Puritans were neither visionaries nor self-conscious heroes. They were a part of society that believed in solid work such as building homes, trading, farming, and government. Anne Bradstreet was unique to authors of her time because her work had literary creativity and artistic merit and was written for literature. In contrast, works of Winthrop and Bradford were written for historical purposes and to express their positions and political beliefs on certain positions. In England in 1650, some of Bradstreet's poems compiled together by her brother-in-law who named them The Tenth Muse. The first of these poems was the Four Elements, which are fire, water, earth, and air. The Constitutions were the four temperaments of man kind as they were seen by medieval and Renaissance physiology, choleric, melancholic, phlegmatic, and sanguine. The four Ages of Man, which are child, teen, adult, and elder as Seasons of the Year which are Fall, Spring, Summer and Winter were described and explained. Bradstreet was better with her knowledge of literature rather than her own personal opinions directly. In some poems, Bradstreet displays deep affections of the patriarchal Puritan household and a sensuous response to nature. Bradstreet’s literature showed both sides of the spectrum by upholding puritan beliefs as well as creating artistic merit. The American writings of the seventeenth century possess as a whole no great artistic merit. They are valuable chiefly as a study in origins and as a complex mirror of early American experience. The world that they reflect is that of the Renaissance and Reformation, of Raleigh and Calvin and Cromwell, modified by its contact with the American wilderness. (â€Å"American Literature Lectures, Part I†) They are valuable in the sense as it is a study in origins of popular religious and political ideology of the early American experience that helped shape present day America. This experience was one that reflected the Renaissance and Reformation of individuals such as Calvin and Bradstreet. The branch of Reformation in Puritan ideology was one of the main topics of early American literature. In this Puritan literature, the mind of the a Puritan is shown through its consciousness of sin, Calvinistic beliefs, superstitions, contradicting beliefs of orthodoxy and nonconformity, and its preference to moral value over aesthetic value. Puritan tradition was a major influence in our nations government through establishments of principles such as the relationship between church and state and government’s popular sovereignty. Puritanism has contributed to the way our day-to-day lives are carried on. It has also contributed the way literature has transformed over the years. Many political and religious ideologies from Puritan literature are still upheld today. Works Cited Gelernter, David. â€Å"Puritanism lives. † The American Enterprise17. 4 (2006): 25+. Student Edition. Web. 18 Dec. 2011. â€Å"Puritans and Puritanism. † Benet's Reader's Encyclopedia of American Literature. George B. Perkins, Barbara Perkins, and Phillip Leininger. Vol. 1. New York: HarperCollins, 1991. 888. Student Edition. Web. 18 Dec. 2011. â€Å"PAL: American Puritanism: A Brief Introduction. † California State University Stanislaus | Home. N. p. , n. d. Web. 18 Dec. 2011. . Renaissance, the, the Reformation. â€Å"American Literature Lectures, Part I. † Texas. Net Lonestar. N. p. , n. d. Web. 18 Dec. 2011. < http://lonestar. texas. net/~mseifert/amlit1. html> Signet, Theodore Dreiser. New York:, and 1964. 815-28.. â€Å"The Influence of Puritanism on American Literature :: The Compulsive Reader :: A Haven for Book Lovers. † Compulsive Reader. N. p. , n. d. Web. 18 Dec. 2011. .

Articles of Association - Free Essay Example

Sample details Pages: 7 Words: 1997 Downloads: 2 Date added: 2017/06/26 Category Law Essay Type Research paper Did you like this example? Task 5: (a) Explain requirements of memorandum of association. A memorandum is a simple document which states that the subscribers wish to form a company and become members of it. The memorandum of association was an extremely important document containing information concerning the relationship between the company before the Companies Act 2006 and the outside world (e.g: its objectives). The purpose of the memorandum is two fold. Don’t waste time! Our writers will create an original "Articles of Association" essay for you Create order 1. The intending share holder who contemplates the investment of his capital shall know within what field it is to be put at risk. 2. Anyone who shall deal with the company shall know without reasonable doubt whether the contractual relation into which he contemplates entering with the company is one relating to a matter within its corporate objects. At least seven persons in the case of public company and at least two in the case of a private company must subscribe to the memorandum. The memorandum shall be printed, divided into consecutively numbered paragraphs, and shall be signed by each subscriber, with his address, description and occupation added, the presence of at least one witness who will attest the same. According to section 13, the memorandum of association of every company must contain the following clauses: 1. The name of the company with à ¢Ã¢â€š ¬Ã‹Å"limitedà ¢Ã¢â€š ¬Ã¢â€ž ¢ as the last word of the name in the case of a public limited company and wit h à ¢Ã¢â€š ¬Ã‹Å"private limitedà ¢Ã¢â€š ¬Ã¢â€ž ¢ as the last word in the case of a private limited company. 2. The state in which the registered office of the company is to be situated. 3. The objects of the company to be classified as: a). The main objects of the company to be pursued by the company on its incorporation and objects incidental to the attainments of the main objects, and b). Other objects not included above 4. In the case of companies with object not confined to one state, the states to whose territories the objects extend. 5. The liability of members is limited if the company is limited by shares or by guarantee. 6. In the case of a company having a share capital, the amount of share capital with which the company proposes to be registered and its division into shares of a fixed amount. An unlimited company need not include items 5 and 6 in its memorandum. In the case of a company limited by guarantee, its memorandum of association shall state that each member undertakes to contribute to the assets of the company, in the event of its being wound up while he is a member or within or year after wards for the payment of the debts and liabilities of the company. (b) Draw up a memorandum of association in given scenario 1. James is considering setting up a house building business as a private limited company. He decides to adopt the model article as article of association of his company, so he need to draw up a memorandum of association. The following are certain provisions of the memorandum of association of Jamesà ¢Ã¢â€š ¬Ã¢â€ž ¢s company. The companyà ¢Ã¢â€š ¬Ã¢â€ž ¢s name is à ¢Ã¢â€š ¬Ã‹Å"Great James Co. Ltdà ¢Ã¢â€š ¬Ã¢â€ž ¢. The company is to be a private limited company. The companyà ¢Ã¢â€š ¬Ã¢â€ž ¢s registered office to be situated at No. 50 Main Road of Yangon. The companys objective is setting up a house building business. The liability of the members is limited. The companyà ¢Ã¢â€š ¬Ã¢â€ž ¢s share capital is  £ 30,000 divided into 30,000 shares of  £1 each. Task 6: Draw up certain provisions of article for Mickà ¢Ã¢â€š ¬Ã¢â€ž ¢s company applying the facts given in scenario 2. A companyà ¢Ã¢â€š ¬Ã‹Å"s constitution comprises the Articles of Association and any resolution and agreements it makes which affect the constitution. According to s 17 of the Companies Act 2006, the constitution of a company consists of: The Article of Association Resolutions and agreements that it makes that affects the constitution The Article of Association is a document that specifies the regulations for a companys operations. The articles of association define the companys purpose and lays out how tasks are to be accomplished within the organization, including the process for appointing directors and how financial records will be handled. By applying the facts given in scenario 2, the following are certain clauses of Article of Association of Mickà ¢Ã¢â€š ¬Ã¢â€ž ¢s company. The company issues only ordinary share. But other two types of shares can be issued if it thinks fit for the benefit of the company. The company prohibits from recognizing the interest of a third party in shares registered in the name of member. The company prevents technicians employed from working in or setting up a similar business. The company allows the alteration of article of association if it is approved by three quarters of member by written resolution. The company increases or reduces the number of director by passing ordinary resolution. Task 7: Evaluate the doctrine of ultra vires and its effect. The companyà ¢Ã¢â€š ¬Ã¢â€ž ¢s objects are its aims and purposes. If a company enters into a contract which is outside its objects, that contract is said to be ultra vires. However the rights of third parties to the contract are protected. The object clause of the Memorandum of the company contains the object for which the company is formed. An act of the company must not be beyond the objects clause, otherwise it will be ultra vires and, therefore, void and cannot be ratified even if all the members wish to ratify it. This is called the doctrine of ultra vires, which has been firmly established in the case of Ashtray Railway Carriage and Iron Company Ltd v. Riche. In the case of Ashbury Rainway Carriage Iron Co Ltd v Riche 1875, the company had an objects claue which stated that its objects were to make and sell, or lend on hire, railway carriage and wagons and all kinds of railway plant, fitting, machinery and rolling stock; and to carry on business as mechanical engineers. The company bought a concession to build a railway in Belgium, subcontracting the work to the defendant. Later the company repudiated the contract. It was held that constructing a railway was not within the companys objects so the company did not have capacity to enter into either the concession contract or the sub-contract. The contract was void for ultra vires and so the defendant had no right to damages for breach. The members could not ratify it and the company could neither enforce the contract nor be forced into performing its obligation. The expression ultra vires means an act beyond the powers. Here the expression ultra vires is used to indicate an act of the company which is beyond the powers conferred on the company by the objects clause of its memorandum. An ultra vires act is void and cannot be ratified even if all the directors wish to ratify it. Sometimes the expression ultra vires is used to describ e the situation when the directors of a company have exceeded the powers delegated to them. Where a company exceeds its power as conferred on it by the objects clause of its memorandum, it is not bound by it because it lacks legal capacity to incur responsibility for the action, but when the directors of a company have exceeded the powers delegated to them. This use must be avoided for it is apt to cause confusion between two entirely distinct legal principles. Consequently, here we restrict the meaning of ultra vires objects clause of the companyà ¢Ã¢â€š ¬Ã¢â€ž ¢s memorandum. Basic principles included the following: An ultra vires transaction cannot be ratified by all the shareholders, even if they wish it to be ratified. The doctrine of estoppels usually precluded reliance on the defense of ultra vires where the transaction was fully performed by one party A fortiori, a transaction which was fully performed by both parties could not be attacked. If the contract was fully execu tory, the defense of ultra vires might be raised by either party. If the contract was partially performed, and the performance was held to be insufficient to bring the doctrine of estoppels into play, a suit for quasi contract for recovery of benefits conferred was available. If an agent of the corporation committed a tort within the scope of his or her employment, the corporation could not defend on the ground the act was ultra vires. Task 8: Explain the contents of a prospectus and listing particulars. A prospectus is a disclosure document that describes a financial security for potential buyers. A prospectus must be published where certain types of securities either are offered to the public or are requested for admission on a regulated market. A prospectus is an invitation to the public to subscribe for, or to purchase, shares or debentures in a company. A prospectus is required when a company is applying for admission to listing or, if it is already listed, wishes to i ssue additional or a new class of shares or debentures. The transposing British registration puts any person responsible for the prospectus who knows of the change under a duty to notify it to the company or the applicant for admission, if different. It is unclear whether this duty arises if the issuer is unaware of the event and it cannot be said that it should have been. The traditional British prospectus has been a single document containing all the relevant information. Under the Directive it may consist of two documents and incorporate some information by reference. Where there are two documents, the prospectus will consist of a registration statement and a securities note. The registration statement, containing information about the issuer, can be field with the relevant authority and, if approved, be valid for twelve months. The securities note can then be produced later and contain the information about the scurries on offer plus updated information, if any is needed, abo ut the issuer. When a listed company proposes certain types of transaction it may be required by the Listing Rules to issue a circular to its shareholders, to inform them of the proposal and, in some cases, to obtain their approval. The public companies are permitted to offer their shares to the public, but may not in fact have chosen to do so. Even if they have, those shares may or not may not be traded on a public share exchange, such as the London Stock Exchange. Offering shares to the public and arranging for those shares to be traded on a public market are two separate things, though the publics willingness to buy the shares offered is likely to be increased if the shares will be traded on a public market. This is because a public share market makes it much easier for a shareholder subsequently to sell his or her shares to another investor, should he or she wish to do so. Consequently, public offerings of shares and the introduction of those shares to trading on a public mar ket often go together. By and large, the companies legislation makes very few differentiations according to where a public companys shares have actually been offered to the public or are in fact publicly traded. This is that admission to a public market may bring with it obligations for the company of a recognizably company law type, obligations which could have been included in the Act. A company seeking to have its shares traded on the main market of the London Stock Exchange must first have them admitted to the Official List of securities. Such Listing rules relate mainly to the orderly conduct of the public share market, but they also contain rules regulating the internal affairs of companies, which thus supplement the provisions of the Companies Act and the common law of companies. In short, the fact of listing is being used to identify a small group of very important British companies to which additional company law obligations are attached. References: Principle of Modern Company Law, Paul L. Davies, Q.C (Hons), F.B.A, Edition- Eighth Edition, Published in 2008 by Sweet Maxwell Ltd. https://www.preservearticles.com/201104085069/complete-information-on-memorandum-of-association-of-a-company-its-purpose-contents-a-different-clauses.html https://www.investopedia.com/terms/a/articles-of-association.asp https://www.caclubindia.com/forum/notes-doctrine-of-ultra-vires-effects-and-exceptions-129912.asp#.VDtKJHbZOH8