In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, cold rolling processes the most tonnage out of all cold working processes. Roll stands holding pairs of rolls are grouped together into rolling mills that can process metal steel, into products such as structural steel, bar stock, rails. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products. There are many types of rolling processes, including ring rolling, roll bending, roll forming, profile rolling, controlled rolling.
The invention of the rolling mill in Europe may be attributed to Leonardo da Vinci in his drawings. The earliest rolling mills in crude form but the same basic principles were found in Middle East and South Asia as early as 600 BCE. Earliest rolling mills were slitting mills, which were introduced from what is now Belgium to England in 1590; these passed flat bars between rolls to form a plate of iron, passed between grooved rolls to produce rods of iron. The first experiments at rolling iron for tinplate took place about 1670. In 1697, Major John Hanbury erected a mill at Pontypool to roll'Pontypool plates'—blackplate; this began to be rerolled and tinned to make tinplate. The earlier production of plate iron in Europe had been in forges, not rolling mills; the slitting mill was adapted to producing hoops and iron with a half-round or other sections by means that were the subject of two patents of c. 1679. Some of the earliest literature on rolling mills can be traced back to Christopher Polhem in 1761 in Patriotista Testamente, where he mentions rolling mills for both plate and bar iron.
He explains how rolling mills can save on time and labor because a rolling mill can produce 10 to 20 or more bars at the same time. A patent was granted to Thomas Blockley of England in 1759 for the rolling of metals. Another patent was granted in 1766 to Richard Ford of England for the first tandem mill. A tandem mill is one. Rolling mills for lead seem to have existed by the late 17th century. Copper and brass were rolled by the late 18th century. Modern rolling practice can be attributed to the pioneering efforts of Henry Cort of Funtley Iron Mills, near Fareham, England. In 1783, a patent was issued to Henry Cort for his use of grooved rolls for rolling iron bars. With this new design, mills were able to produce 15 times more output per day than with a hammer. Although Cort was not the first to use grooved rolls, he was the first to combine the use of many of the best features of various ironmaking and shaping processes known at the time, thus modern writers have called him "father of modern rolling."
The first rail rolling mill was established by John Birkenshaw in 1820, where he produced fish bellied wrought iron rails in lengths of 15 to 18 feet. With the advancement of technology in rolling mills, the size of rolling mills grew along with the size of the products being rolled. One example of this was at The Great Exhibition in 1851, where a plate 20 feet long, 3 ½ feet wide, 7/16 of an inch thick, weighing 1,125 pounds, was exhibited by the Consett Iron Company. Further evolution of the rolling mill came with the introduction of three-high mills in 1853 used for rolling heavy sections. Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening; the starting material is large pieces of metal, like semi-finished casting products, such as slabs and billets. If these products came from a continuous casting operation the products are fed directly into the rolling mills at the proper temperature.
In smaller operations, the material must be heated. This is done in a gas- or oil-fired soaking pit for larger workpieces; as the material is worked, the temperature must be monitored to make sure it remains above the recrystallization temperature. To maintain a safety factor a finishing temperature is defined above the recrystallization temperature. If the temperature does drop below this temperature the material must be re-heated before more hot rolling. Hot-rolled metals have little directionality in their mechanical properties and deformation induced residual stresses. However, in certain instances non-metallic inclusions will impart some directionality and workpieces less than 20 mm thick have some directional properties. Non-uniform cooling will induce a lot of residual stresses, which occurs in shapes that have a non-uniform cross-section, such as I-beams. While the finished product is of good quality, the surface is covered in mill scale, an oxide that forms at high temperatures, it is removed via pickling or the smooth clean surface process, which reveals a smooth surface.
Dimensional tolerances are us
Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio in the metal. In modern manufacturing, other chemicals may be used on other types of material; as a method of printmaking, it is, along with engraving, the most important technique for old master prints, remains in wide use today. In a number of modern variants such as microfabrication etching and photochemical milling it is a crucial technique in much modern technology, including circuit boards. In traditional pure etching, a metal plate is covered with a waxy ground, resistant to acid; the artist scratches off the ground with a pointed etching needle where he or she wants a line to appear in the finished piece, so exposing the bare metal. The échoppe, a tool with a slanted oval section, is used for "swelling" lines; the plate is dipped in a bath of acid, technically called the mordant or etchant, or has acid washed over it. The acid "bites" into the metal where it is exposed, leaving behind lines sunk into the plate.
The remaining ground is cleaned off the plate. The plate is inked all over, the ink wiped off the surface, leaving only the ink in the etched lines; the plate is put through a high-pressure printing press together with a sheet of paper. The paper picks up the ink from the etched lines; the process can be repeated many times. The work on the plate can be added to by repeating the whole process. Etching has been combined with other intaglio techniques such as engraving or aquatint. Etching by goldsmiths and other metal-workers in order to decorate metal items such as guns, armour and plates has been known in Europe since the Middle Ages at least, may go back to antiquity; the elaborate decoration of armour, in Germany at least, was an art imported from Italy around the end of the 15th century—little earlier than the birth of etching as a printmaking technique. Printmakers from the German-speaking lands and Central Europe perfected the art and transmitted their skills over the Alps and across Europe.
The process as applied to printmaking is believed to have been invented by Daniel Hopfer of Augsburg, Germany. Hopfer was a craftsman who decorated armour in this way, applied the method to printmaking, using iron plates. Apart from his prints, there are two proven examples of his work on armour: a shield from 1536 now in the Real Armeria of Madrid and a sword in the Germanisches Nationalmuseum of Nuremberg. An Augsburg horse armour in the German Historical Museum, dating to between 1512 and 1515, is decorated with motifs from Hopfer's etchings and woodcuts, but this is no evidence that Hopfer himself worked on it, as his decorative prints were produced as patterns for other craftsmen in various media; the oldest dated etching is by Albrecht Dürer in 1515, although he returned to engraving after six etchings instead of developing the craft. The switch to copper plates was made in Italy, thereafter etching soon came to challenge engraving as the most popular medium for artists in printmaking.
Its great advantage was that, unlike engraving where the difficult technique for using the burin requires special skill in metalworking, the basic technique for creating the image on the plate in etching is easy to learn for an artist trained in drawing. On the other hand, the handling of the ground and acid need skill and experience, are not without health and safety risks, as well as the risk of a ruined plate. Prior to 1100 AD, the New World Hohokam independently utilized the technique of acid etching in marine shell designs. Jacques Callot from Nancy in Lorraine made important technical advances in etching technique, he developed the échoppe, a type of etching-needle with a slanting oval section at the end, which enabled etchers to create a swelling line, as engravers were able to do. Callot appears to have been responsible for an improved, recipe for the etching ground, using lute-makers' varnish rather than a wax-based formula; this enabled lines to be more bitten, prolonging the life of the plate in printing, greatly reducing the risk of "foul-biting", where acid gets through the ground to the plate where it is not intended to, producing spots or blotches on the image.
The risk of foul-biting had always been at the back of an etcher's mind, preventing too much time on a single plate that risked being ruined in the biting process. Now etchers could do the detailed work, the monopoly of engravers, Callot made full use of the new possibilities. Callot made more extensive and sophisticated use of multiple "stoppings-out" than previous etchers had done; this is the technique of letting the acid bite over the whole plate stopping-out those parts of the work which the artist wishes to keep light in tone by covering them with ground before bathing the plate in acid again. He achieved unprecedented subtlety in effects of distance and light and shade by careful control of this process. Most of his prints were small—up to about six inches or 15 cm on their longest dimension, but packed with detail. One of his followers, the Parisian Abraham Bosse, spread Callot's innovations all over Europe with the first published manual of etching, translated into Italian, Dutch and English.
Penny (United States coin)
The United States one-cent coin called the penny, is a unit of currency equaling one one-hundredth of a United States dollar. The cent's symbol is ¢, its obverse has featured the profile of President Abraham Lincoln since 1909, the centennial of his birth. From 1959 to 2008, the reverse featured the Lincoln Memorial. Four different reverse designs in 2009 honored Lincoln's 200th birthday and a new, "permanent" reverse – the Union Shield – was introduced in 2010; the coin is 0.75 inches in diameter and 0.0598 inches in thickness. Its weight has varied, depending upon the composition of metals used in its production; the U. S. Mint's official name for the coin is "cent" and the U. S. Treasury's official name is "one cent piece"; the colloquial term penny derives from the British coin of the same name, the pre-decimal version of which had a similar place in the British system. In American English, pennies is the plural form. In the early 2010s the price of metal used to make pennies rose to a noticeable cost to the mint which peaked at a $0.02 for $0.01 ratio.
This pushed the mint to look for alternative metals again for the coin, brought the penny debate into more focus. There are no firm plans to eliminate the penny as arguments for and against the coin continue to be debated. In honor of Lincoln's 200th anniversary, special 2009 cents were minted for collectors in the same composition as the 1909 coins; the isotope composition of early coins spanning the period 1828 to 1843 reflects the copper from Cornish ores from England, while coins after 1850 reflect the Keweenaw Peninsula, Michigan ores, a finding consistent with historical records. In 1943, at the peak of World War II, zinc-coated steel cents were made for a short time because of war demands for copper. A few copper cents from 1943 were produced from the 1942 planchets remaining in the bins; some 1944 steel cents have been confirmed. From 1944 to 1946, salvaged ammunition shells made their way into the minting process, it was not uncommon to see coins featuring streaks of brass or having a darker finish than other issues.
During the early 1970s, the price of copper rose to the point where the cent contained one cent's worth of copper. This led the Mint to test alternative metals, including aluminum and bronze-clad steel. Aluminum was chosen, over 1.5 million of these pennies were struck and ready for public release before being rejected. The proposed aluminum pennies were rejected for two reasons: vending machine owners complained the coins would cause mechanical problems. One aluminum cent was donated to the Smithsonian Institution; the cent's composition was changed in 1982 because the value of the copper in the coin started to rise above one cent. Some 1982 pennies used the 97.5% zinc composition, while others used the 95% copper composition. With the exception of 2009 bicentennial cents minted for collectors, United States cents minted after 1982 have been zinc with copper plating. In Fiscal Year 2013, the average one-cent piece minted cost the U. S. Mint 1.83 cents, down from 2.41 cents apiece in FY 2011. The bronze and copper cents can be distinguished from the newer zinc cents by dropping the coins on a solid surface.
The predominantly zinc coins make a lower-pitched "clunk", while the copper coins produce a higher-pitched ringing sound. In addition, a full 50-cent roll of pre-1982/3 coins weighs 5.4 oz compared to a post-1982–83 roll which weighs 4.4 oz. Mintage figures for the penny can be found at United States cent mintage figures; the coin has gone through several designs over its two-hundred-year time frame. Until 1857 it was about the size of the current U. S. dollar coins. The following types of cents have been produced: Large cents: Flowing Hair Chain 1793 Flowing Hair Wreath 1793 Liberty Cap 1793–1796 Draped bust 1796–1807 Classic Head 1808–1814 Coronet 1816–1839 Braided Hair 1839–1857, 1868 Small cents: Flying Eagle cent Indian Head cent Lincoln cent Lincoln Wheat Lincoln Memorial Lincoln Bicentennial 4 reverse designs Lincoln Union Shield Throughout its history, the Lincoln cent has featured several typefaces for the date, but most of the digits have been old-style numerals, except with the 4 and 8 neither ascending nor descending.
The only significant divergence is that the small 3 was non-descending in the early history, before switching to a descending, large 3 for just one year in 1934 and permanently in 1943. The digit 5 was small and non-descending up to 1945 from 1950 and on, it became a large descending 5. From 1959 until 2008, the Lincoln Memorial was shown on the reverse of the United States cent; because the Lincoln Memorial was shown in sufficient detail to discern the statue of Lincoln on the reverse of cent, Abraham Lincoln was at that time the only person to be depicted on both the obverse and reverse of the same United States coin. In 1999, the New Jersey state quarter was released, which depicts George Washington on both sides, crossing the Delaware River on the reverse side and in profile on the obverse. (The state quarter for South Dakota, released in 2006 features Washington on both sides: the typical profile on the obverse, Washington within Mount Rushmore on the re
Leeds is a city in West Yorkshire, England. Leeds has one of the most diverse economies of all the UK's main employment centres and has seen the fastest rate of private-sector jobs growth of any UK city, it has the highest ratio of private to public sector jobs of all the UK's Core Cities, with 77% of its workforce working in the private sector. Leeds has the third-largest jobs total by local authority area, with 480,000 in employment and self-employment at the beginning of 2015. Leeds is ranked as a gamma world city by World Cities Research Network. Leeds is the cultural and commercial heart of the West Yorkshire Urban Area. Leeds is served by four universities, has the fourth largest student population in the country and the country's fourth largest urban economy. Leeds was a small manorial borough in the 13th century, in the 17th and 18th centuries it became a major centre for the production and trading of wool, in the Industrial Revolution a major mill town. From being a market town in the valley of the River Aire in the 16th century, Leeds expanded and absorbed the surrounding villages to become a populous urban centre by the mid-20th century.
It now lies within the West Yorkshire Urban Area, the United Kingdom's fourth-most populous urban area, with a population of 2.6 million. Today, Leeds has become the largest legal and financial centre, outside London with the financial and insurance services industry worth £13 billion to the city's economy; the finance and business service sector account for 38% of total output with more than 30 national and international banks located in the city, including an office of the Bank of England. Leeds is the UK's third-largest manufacturing centre with around 1,800 firms and 39,000 employees, Leeds manufacturing firms account for 8.8% of total employment in the city and is worth over £7 billion to the local economy. The largest sub-sectors are engineering and publishing, food and drink and medical technology. Other key sectors include retail and the visitor economy and the creative and digital industries; the city saw several firsts, including the oldest-surviving film in existence, Roundhay Garden Scene, the 1767 invention of soda water.
Public transport and road communications networks in the region are focused on Leeds, the second phase of High Speed 2 will connect it to London via East Midlands Hub and Sheffield Meadowhall. Leeds has the third busiest railway station and the tenth busiest airport outside London; the name derives from the old Brythonic word Ladenses meaning "people of the fast-flowing river", in reference to the River Aire that flows through the city. This name referred to the forested area covering most of the Brythonic kingdom of Elmet, which existed during the 5th century into the early 7th century. Bede states in the fourteenth chapter of his Ecclesiastical History, in a discussion of an altar surviving from a church erected by Edwin of Northumbria, that it is located in...regione quae vocatur Loidis. An inhabitant of Leeds is locally known as a word of uncertain origin; the term Leodensian is used, from the city's Latin name. The name has been explained as a derivative of Welsh lloed, meaning "a place".
Leeds developed as a market town in the Middle Ages as part of the local agricultural economy. Before the Industrial Revolution, it became a co-ordination centre for the manufacture of woollen cloth, white broadcloth was traded at its White Cloth Hall. Leeds handled one sixth of England's export trade in 1770. Growth in textiles, was accelerated by the building of the Aire and Calder Navigation in 1699 and the Leeds and Liverpool Canal in 1816. In the late Georgian era, William Lupton, Lord of the Manor of Leeds, was one of a number of central Leeds landowners with the mesne lord title, some of whom, like him, were textile manufacturers. At the time of his death in 1828, Lupton's land in Briggate in central Leeds included a mill, manor house and outbuildings; the railway network constructed around Leeds, starting with the Leeds and Selby Railway in 1834, provided improved communications with national markets and for its development, an east-west connection with Manchester and the ports of Liverpool and Hull giving improved access to international markets.
Alongside technological advances and industrial expansion, Leeds retained an interest in trading in agricultural commodities, with the Corn Exchange opening in 1864. Marshall's Mill was one of the first of many factories constructed in Leeds from around 1790 when the most significant were woollen finishing and flax mills. Manufacturing diversified by 1914 to printing, engineering and clothing manufacture. Decline in manufacturing during the 1930s was temporarily reversed by a switch to producing military uniforms and munitions during World War II. However, by the 1970s, the clothing industry was in irreversible decline, facing cheap foreign competition; the contemporary economy has been shaped by Leeds City Council's vision of building a'24-hour European city' and'capital of the north'. The city has developed from the decay of the post-industrial era to become a telephone banking centre, connected to the electronic infrastructure of the modern global economy. There has been growth in the corporate and legal sectors, increased local affluence has led to an expanding retail sector, including the luxury goods market.
Leeds City Region Enterprise Zone was launched in April 2012 to promote development in four sites along the A63 East Leeds Link Road. Leeds was a manor and townshi
Rail transport is a means of transferring of passengers and goods on wheeled vehicles running on rails known as tracks. It is commonly referred to as train transport. In contrast to road transport, where vehicles run on a prepared flat surface, rail vehicles are directionally guided by the tracks on which they run. Tracks consist of steel rails, installed on ties and ballast, on which the rolling stock fitted with metal wheels, moves. Other variations are possible, such as slab track, where the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system encounters lower frictional resistance than road vehicles, so passenger and freight cars can be coupled into longer trains; the operation is carried out by a railway company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway electrification system or produce their own power by diesel engines.
Most tracks are accompanied by a signalling system. Railways are a safe land transport system. Railway transport is capable of high levels of passenger and cargo utilization and energy efficiency, but is less flexible and more capital-intensive than road transport, when lower traffic levels are considered; the oldest known, man/animal-hauled railways date back to the 6th century BC in Greece. Rail transport commenced in mid 16th century in Germany in the form of horse-powered funiculars and wagonways. Modern rail transport commenced with the British development of the steam locomotives in the early 19th century, thus the railway system in Great Britain is the oldest in the world. Built by George Stephenson and his son Robert's company Robert Stephenson and Company, the Locomotion No. 1 is the first steam locomotive to carry passengers on a public rail line, the Stockton and Darlington Railway in 1825. George Stephenson built the first public inter-city railway line in the world to use only the steam locomotives all the time, the Liverpool and Manchester Railway which opened in 1830.
With steam engines, one could construct mainline railways, which were a key component of the Industrial Revolution. Railways reduced the costs of shipping, allowed for fewer lost goods, compared with water transport, which faced occasional sinking of ships; the change from canals to railways allowed for "national markets" in which prices varied little from city to city. The spread of the railway network and the use of railway timetables, led to the standardisation of time in Britain based on Greenwich Mean Time. Prior to this, major towns and cities varied their local time relative to GMT; the invention and development of the railway in the United Kingdom was one of the most important technological inventions of the 19th century. The world's first underground railway, the Metropolitan Railway, opened in 1863. In the 1880s, electrified trains were introduced, leading to electrification of tramways and rapid transit systems. Starting during the 1940s, the non-electrified railways in most countries had their steam locomotives replaced by diesel-electric locomotives, with the process being complete by the 2000s.
During the 1960s, electrified high-speed railway systems were introduced in Japan and in some other countries. Many countries are in the process of replacing diesel locomotives with electric locomotives due to environmental concerns, a notable example being Switzerland, which has electrified its network. Other forms of guided ground transport outside the traditional railway definitions, such as monorail or maglev, have been tried but have seen limited use. Following a decline after World War II due to competition from cars, rail transport has had a revival in recent decades due to road congestion and rising fuel prices, as well as governments investing in rail as a means of reducing CO2 emissions in the context of concerns about global warming; the history of rail transport began in the 6th century BC in Ancient Greece. It can be divided up into several discrete periods defined by the principal means of track material and motive power used. Evidence indicates that there was 6 to 8.5 km long Diolkos paved trackway, which transported boats across the Isthmus of Corinth in Greece from around 600 BC.
Wheeled vehicles pulled by men and animals ran in grooves in limestone, which provided the track element, preventing the wagons from leaving the intended route. The Diolkos was in use for over 650 years, until at least the 1st century AD; the paved trackways were later built in Roman Egypt. In 1515, Cardinal Matthäus Lang wrote a description of the Reisszug, a funicular railway at the Hohensalzburg Fortress in Austria; the line used wooden rails and a hemp haulage rope and was operated by human or animal power, through a treadwheel. The line still exists and is operational, although in updated form and is the oldest operational railway. Wagonways using wooden rails, hauled by horses, started appearing in the 1550s to facilitate the transport of ore tubs to and from mines, soon became popular in Europe; such an operation was illustrated in Germany in 1556 by Georgius Agricola in his work De re metallica. This line used "Hund" carts with unflanged wheels running on wooden planks and a vertical pin on the truck fitting into the gap between the planks to keep it going the right way.
The miners called the wagons Hunde from the noise. There are many references to their use in central Europe in the 16th century; such a transport system was used by German miners at Cal
OCLC Online Computer Library Center, Incorporated d/b/a OCLC is an American nonprofit cooperative organization "dedicated to the public purposes of furthering access to the world's information and reducing information costs". It was founded in 1967 as the Ohio College Library Center. OCLC and its member libraries cooperatively produce and maintain WorldCat, the largest online public access catalog in the world. OCLC is funded by the fees that libraries have to pay for its services. OCLC maintains the Dewey Decimal Classification system. OCLC began in 1967, as the Ohio College Library Center, through a collaboration of university presidents, vice presidents, library directors who wanted to create a cooperative computerized network for libraries in the state of Ohio; the group first met on July 5, 1967 on the campus of the Ohio State University to sign the articles of incorporation for the nonprofit organization, hired Frederick G. Kilgour, a former Yale University medical school librarian, to design the shared cataloging system.
Kilgour wished to merge the latest information storage and retrieval system of the time, the computer, with the oldest, the library. The plan was to merge the catalogs of Ohio libraries electronically through a computer network and database to streamline operations, control costs, increase efficiency in library management, bringing libraries together to cooperatively keep track of the world's information in order to best serve researchers and scholars; the first library to do online cataloging through OCLC was the Alden Library at Ohio University on August 26, 1971. This was the first online cataloging by any library worldwide. Membership in OCLC is based on use of services and contribution of data. Between 1967 and 1977, OCLC membership was limited to institutions in Ohio, but in 1978, a new governance structure was established that allowed institutions from other states to join. In 2002, the governance structure was again modified to accommodate participation from outside the United States.
As OCLC expanded services in the United States outside Ohio, it relied on establishing strategic partnerships with "networks", organizations that provided training and marketing services. By 2008, there were 15 independent United States regional service providers. OCLC networks played a key role in OCLC governance, with networks electing delegates to serve on the OCLC Members Council. During 2008, OCLC commissioned two studies to look at distribution channels. In early 2009, OCLC negotiated new contracts with the former networks and opened a centralized support center. OCLC provides bibliographic and full-text information to anyone. OCLC and its member libraries cooperatively produce and maintain WorldCat—the OCLC Online Union Catalog, the largest online public access catalog in the world. WorldCat has holding records from private libraries worldwide; the Open WorldCat program, launched in late 2003, exposed a subset of WorldCat records to Web users via popular Internet search and bookselling sites.
In October 2005, the OCLC technical staff began a wiki project, WikiD, allowing readers to add commentary and structured-field information associated with any WorldCat record. WikiD was phased out; the Online Computer Library Center acquired the trademark and copyrights associated with the Dewey Decimal Classification System when it bought Forest Press in 1988. A browser for books with their Dewey Decimal Classifications was available until July 2013; until August 2009, when it was sold to Backstage Library Works, OCLC owned a preservation microfilm and digitization operation called the OCLC Preservation Service Center, with its principal office in Bethlehem, Pennsylvania. The reference management service QuestionPoint provides libraries with tools to communicate with users; this around-the-clock reference service is provided by a cooperative of participating global libraries. Starting in 1971, OCLC produced catalog cards for members alongside its shared online catalog. OCLC commercially sells software, such as CONTENTdm for managing digital collections.
It offers the bibliographic discovery system WorldCat Discovery, which allows for library patrons to use a single search interface to access an institution's catalog, database subscriptions and more. OCLC has been conducting research for the library community for more than 30 years. In accordance with its mission, OCLC makes its research outcomes known through various publications; these publications, including journal articles, reports and presentations, are available through the organization's website. OCLC Publications – Research articles from various journals including Code4Lib Journal, OCLC Research, Reference & User Services Quarterly, College & Research Libraries News, Art Libraries Journal, National Education Association Newsletter; the most recent publications are displayed first, all archived resources, starting in 1970, are available. Membership Reports – A number of significant reports on topics ranging from virtual reference in libraries to perceptions about library funding. Newsletters – Current and archived newsletters for the library and archive community.
Presentations – Presentations from both guest speakers and OCLC research from conferences and other events. The presentations are organized into five categories: Conference presentations, Dewey presentations, Distinguished Seminar Series, Guest presentations, Research staff
A statute is a formal written enactment of a legislative authority that governs a city, state, or country. Statutes command or prohibit something, or declare policy. Statutes are rules made by legislative bodies. In all countries, newly enacted statutes are published in a Government gazette, distributed so that everyone can look up the statutory law. A universal problem encountered by lawmakers throughout human history is how to organize published statutes; such publications have a habit of starting small but growing over time, as new statutes are enacted in response to the exigencies of the moment. Persons trying to find the law are forced to sort through an enormous number of statutes enacted at various points in time to determine which portions are still in effect; the solution adopted in many countries is to organize existing statutory law in topical arrangements within publications called codes ensure that new statutes are drafted so that they add, repeal or move various code sections. In turn, in theory, the code will thenceforth reflect the current cumulative state of the statutory law in that jurisdiction.
In many nations statutory law is subordinate to constitutional law. The term statute is used to refer to an International treaty that establishes an institution, such as the Statute of the European Central Bank, a protocol to the international courts as well, such as the Statute of the International Court of Justice and the Rome Statute of the International Criminal Court. Statute is another word for law; the term was adapted from England in about the 18th century. In the Autonomous Communities of Spain, the autonomy statute is a legal document similar to a state constitution in a federated state; the autonomies statutes in Spain have the rank of "Ley Organica", a category of special laws reserved only for the main institutions and issues and mentioned in the Constitution. Leyes Organicas rank between ordinary laws; the name was chosen, among others. In biblical terminology, statute refers to a law given without any justification; the classic example is the statute regarding the Red Heifer. The opposite of a chok is a mishpat, a law given for a specified reason, e.g. the Sabbath laws, which were given because "God created the world in six days, but on the seventh day He rested".
That which upholds, supports or maintains the regulatory order of the universe meaning the Law or Natural Law. This is a concept of central importance in Indian religion. Constitution Legislation Legislature Organic statute Statutory law Super statute