File Diving cilinder schematic.JPG thumb right A diving cylinder with its various components, with a two stage open circuit regulator attached A diving cylinder , scuba tank or diving tank is a gas cylinder used to store and transport high pressure breathing gas as a component of a scuba set . It provides ... rating from convert 200 to 300 bar psi lk on . The internal cylinder volume is also expressed as water capacity the volume of water which could be contained by the cylinder. When pressurised, a cylinder ... litre cylinder when it is filled to 200 bar. Cylinders also come in smaller sizes, such as 0.2, 1.5 ... cylinders. The term diving cylinder tends to be used by gas equipment engineers, manufacturers ... to drowning. Parts of a cylinder File Steel 15l cylinder with boot and net and Aluminium 12l cylinder PB128188.jpg thumb A steel 15l cylinder with net and boot and a bare 12l aluminium cylinder File Manifolded twin 12l steel cylinder set PB128182.jpg thumb Two 12l steel cylinders connected by an isolation manifold and tank bands The diving cylinder consists of several parts The pressure vessel The pressure ... cylinder available at tropical dive resorts is an aluminium 80 which is an aluminium cylinder with an internal ... date November 2011 The neck of the cylinder is internally threaded to fit a cylinder valve. There are several ..., torqued to 40 ft.lbf on aluminium cylinders ref name Catalina The shoulder of the cylinder carries stamp markings providing required information about the cylinder ref International Standard ISO 13769, Gas cylinders Stamp markings. First edition 2002 ref The cylinder valve the pillar valve or cylinder ... mixtures to reduce the risk of fire. Optional accessories Types of cylinder valve The most commonly used cylinder valve type is the single outlet plain valve, sometimes known as a K valve, ref name ... into the opening. Y and H cylinder valves have two outlets, each with its own valve, allowing two regulators to be connected to the cylinder. If one regulator freeflows , which is a common failure ... more details
Incomplete date January 2010 File Graduated cylinders diagrams.svg upright thumb right A graduated cylinder , measuring cylinder or graduate is a piece of laboratory equipment used to accurately measure the volume of a liquid. Water displacement can be used to find out the volume of a solid. Graduated cylinders are generally more accurate and precise for this purpose than Laboratory flask flasks and beaker glassware beakers . Often, the largest graduated cylinders are made of polypropylene for its excellent chemical resistance or polymethylpentene for its transparency, making them lighter and less fragile than glass. Polypropylene is easy to repeatedly autoclave however, autoclaving in excess of about convert 130 C depending on the chemical formulation typical commercial grade polypropylene melts in excess of convert 160 C ,can warp or damage polypropylene graduated cylinders, affecting accuracy. A traditional cylinder A in the image is usually narrow and high so as to increase the accuracy of volume measurement and has a plastic or glass stem and a spout for easy pouring from the measured liquid. Certain types of cylinders B in the picture have ground glass joint s instead of a spout ...?idproduct 1239 ref With this kind of cylinder, the metered liquid does not pour directly, but is often removed using a cannula . A graduated cylinder is meant to be read with the surface of the liquid ... of the graduated cylinder is 0.05 mL. The measuring cylinder is normally and most commonly used ... cylinder.jpg Graduated cylinder. The ring at top is used to prevent breakage if knocked over File Measuring cylinder.svg Another illustration gallery References Reflist commonscat Graduated cylinder Laboratory equipment DEFAULTSORT Graduated Cylinder Category Laboratory glassware Category Volumetric ... ja no M lesylinder nn M lesylinder pl Cylinder miarowy pt Proveta ro Cilindru gradat ru simple Measuring cylinder sk Odmern valec sr fi Mittalasi sv M tglas tl Ginatlaang ... more details
vibration. This depends on the layout of the crankshaft more than the cylinder banks alone the planes on which the pistons are arranged, thus their timing and vibration, depend on both the cylinder ... W or broad arrow arrangement uses three cylinder banks, usually a W 12 with three banks of four ... VR6 , have such a narrow bank angle that their cylinders are combined into a single cylinder ... as for other engines or more commonly in these cases one cylinder bank. Radial engines In a radial ... more details
Image Einfachwirkender Zylinder funktionsprinziep.gif thumb Operation diagram of a single acting cylinder. The spring red can also be outside the cylinder, attached to the item being moved. Image Doppelwirkender Zylinder Funktionsprinziep.gif thumb Operation diagram of a double acting cylinder Image Pneumatic cylinder animation .gif thumb 3D computer graphics 3D animated pneumatic cylinder Computer Aided Design CAD Image Kolv pneumatisk .PNG thumb Schematic symbol for pneumatic cylinder with spring ... expansion forces a piston to move in the desired direction. The piston is a disc or cylinder ... cylinder will not drip out and contaminate the surroundings, making pneumatics more desirable ... terminology At least in the USA, popular usage sometimes refers to the whole assembly of cylinder ... on how the precision of a pneumatic cylinder can be affected as the load acting on the cylinder tries to further compress the gas used. Under a vertical load, a case where the cylinder takes on the full load, the precision of the cylinder is affected the most. A study at the National Cheng Kung .... 2005 . Design and Control for The Pneumatic Cylinder Precision Positioning Under Vertical Loading ... numerous other types of pneumatic cylinder available, many of which are designed to fulfill specific and specialized functions. Single acting cylinder Single acting cylinders SAC use the pressure imparted ... to the home position. More often than not, this type of cylinder has limited extension due to the space ... by the cylinder is lost as it tries to push against the spring. Because of those factors, single acting ... cylinder. The spring red can also be outside the cylinder, attached to the item being moved. Operation diagram of a double acting cylinder 3D animated pneumatic cylinder CAD Schematic symbol for pneumatic cylinder with spring return Pneumatic cylinders sometimes known as air cylinders are mechanical ... is a disc or cylinder, and the piston rod transfers the force it develops to the object to be moved ... more details
. The cylinder head bolts to the deck surface at top. Many ribs and bosses can be seen on the side of the casting. This block is for a straight six engine . File Cylinder block for V6 Diesel.jpg thumb A V6 engine V6 diesel engine block, with both of the cylinder banks as well as the crankcase formed ..., Modern Engines, Vol III ref A cylinder block is an wikt integrate Verb integrated structure wikt comprise Verb comprising the cylinder engine cylinder s of a reciprocating engine and often some ... ously with cylinder block although technically distinctions can be made between monobloc engine en ... such as cylinder s , cylinder head cylinder head s , coolant passages, intake and exhaust passages ... with fairly highly integrated design, so the words monobloc engine Cylinder block monobloc ... implicit . Thus engine block , cylinder block , or simply block are the terms likely to be heard in the garage ... to manage the making of thousands of parts. Cylinders integrated into one or several cylinder blocks File Wolseley 6 cylinder marine oil engine Rankin Kennedy, Modern Engines, Vol V .jpg thumb Cylinders are cast in three pairs File Six cylinder engine with three cylinder blocks Autocar Handbook ... thumb DB 605 inverted aircraft engine of World War II WW2 , with monobloc cylinder blocks and heads A cylinder block is a unit comprising several cylinders including their cylinder walls, coolant passages, cylinder sleeves if any, and so forth . In the earliest decades of internal combustion engine development, monobloc cylinder construction was rare cylinders were usually cast individually. Combining their castings into pairs or triples was an early win of monobloc design. Each cylinder bank of a V engine that is, each side of the V typically comprised one or several cylinder blocks until the 1930s, when mass production methods were developed that allowed the modern form factor of having Cylinder ... cylinder block features cylinder walls that are entirely removable, which fit into the block by means ... more details
Cylinder 1024 is the first cylinder disk drive cylinder of a hard disk that was inaccessible in the original IBM PC compatible hardware specification, INT 13H interrupt 13h , which uses cylinder head sector addressing. At boot time very old BIOS of many PCs could only access the first 1024 cylinders, numbered 0 to 1023 as CHS addressing only defines 10 bits for the cylinder count 2 10 1024 . This was a problem for operating system s on the x86 platform as the BIOS must be able to load the bootloader and the entire kernel computer science kernel image into memory. Both of these must, therefore, be located on the first 1024 cylinders of the disk. Older versions of Microsoft Windows resolved this by necessitating that the operating system was installed to the first partition. Because of this bug, users of the Linux operating system have traditionally created a tt boot tt partition to reside within the first 1024 cylinders of the disk, containing little more than the Kernel computer science kernel and bootloader. See also Cylinders 0 to 79 of an Amiga Disk File ADF External links cite web url http homepage.ntlworld.com. jonathan.deboynepollard FGA os2 disc and volume size limits.html title Disc and volume size limits work Frequently Given Answers author Jonathan de Boyne Pollard date 1996 &mdash includes a discussion of the cylinder 1024 limitation. http www.tldp.org HOWTO Large Disk HOWTO 4.html Large Disk HOWTO History of BIOS and IDE limits microcompu stub Category IBM PC compatibles Category Rotating disc computer storage media Category Hard disk computer storage ... more details
Infobox settlement official name Cylinder, Iowa settlement type City nickname motto Images image skyline imagesize image caption image flag image seal Maps image map Palo Alto County Iowa Incorporated and Unincorporated areas Cylinder Highlighted.svg mapsize 250px map caption Location of Cylinder, Iowa image map1 mapsize1 map caption1 Location coordinates region US IA subdivision type List of countries Country subdivision name USA subdivision type1 Political divisions of the United States State subdivision name1 flag Iowa subdivision type2 List of counties in Iowa County subdivision name2 Palo Alto County, Iowa Palo Alto government footnotes government type leader title leader name leader title1 leader name1 established title established date Area unit pref Imperial area footnotes area magnitude area total km2 0.2 area land km2 0.2 area water km2 0.0 area total sq mi 0.1 area land sq mi 0.1 area water sq mi 0.0 Population population as of United States Census, 2000 2000 population footnotes population total 110 population density km2 627.4 population density sq mi 1625.1 General information timezone North American Central Time Zone Central CST utc offset 6 timezone DST CDT utc offset DST 5 elevation footnotes elevation m 363 elevation ft 1191 coordinates display display inline,title latd 43 latm 5 lats 21 latNS N longd 94 longm 33 longs 0 longEW W Area postal codes & others postal code type ZIP code postal code 50528 area code Area code 712 712 blank name Federal Information Processing ... feature ID blank1 info 0455764 website footnotes Cylinder is a city in Palo Alto County, Iowa Palo ... that the name comes from a vehicle that passed over the creek and dropped a cylinder. There are other stories, but no clear definitive explanation. citation needed date August 2007 Geography Cylinder ... Cylinder Iowa es Cylinder Iowa fr Cylinder Iowa io Cylinder, Iowa kk ht Cylinder, Iowa nl Cylinder Iowa pl Cylinder Iowa pt Cylinder Iowa simple Cylinder, Iowa vo Cylinder ... more details
About the mechanical devices used to impart a force from a pressurized liquid or gas pneumatic cylinder ... of steel . A gas cylinder is a pressure vessel used to store gas es at above atmospheric pressure ... cylinder gas , though bottled gas is sometimes used. The United Kingdom and other parts of Europe more ... See Composite overwrapped pressure vessel for details ref Regulations and cylinder testing The transportation ... authority the DfT implements the regulations and appointment of authorised cylinder ... on the cylinder. This information usually includes the type of cylinder, the working or service ... testing is required either every five years or every ten years, depending on cylinder and its service ... attached to a nitrogen cylinder. From right main valve, cylinder pressure gauge, low pressure ... over the protruding valve to protect it from damage or breaking off in case the cylinder were to fall ... valve assembly. When the gas in the cylinder is ready to be used, the cap is taken off and a pressure ... pressure gauge can be used to estimate how much gas is left in the cylinder according to pressure ... pressure of the gas, and does not fall until the cylinder is nearly exhausted. The regulator could be adjusted to control the flow of gas out of the cylinder according to pressure shown by the downstream ... States, an argon cylinder will have a CGA 580 connection on the valve. High purity gases will sometimes ... at Duke University . Although protective caps covering the valves at the top of each cylinder are used .... If a compressed gas cylinder tips over, causing the valve block to be sheared off, the rapid release of high pressure gas may cause the cylinder to be violently accelerated, potentially causing property ... or transport cart with a strap or chain. In a fire, the pressure in a gas cylinder Boyles Law rises ... of the cylinder and there are no means to safely vent the pressurized gas to the atmosphere, the vessel ... . If the cylinder s contents are liquid, but become a gas at ambient conditions, this is commonly ... more details
Telescopic cylinders are a special design of a hydraulic cylinder or pneumatic cylinder which provide ... of a telescopic cylinder is 20 to 40 of the fully extended length depending on the number of stages ... Ultrametal, Telescopic Hydraulic Cylinders ref Image Double acting telescopic cylinder symbol,ISO1219 .svg thumb 150px Telescopic cylinder ISO 1219 symbol Heavy duty telescopic cylinders are usually ... http www.bimba.com Products TRD TC Telescoping Cylinders Bimba TRD Pneumatic Telescoping Cylinder ... cylinder is very difficult considering that the collapsed length of a single stage rod cylinder ... engineer to fit the single stage cylinder into the chassis of the dump truck with the dump body ... a telescopic style multi stage cylinder. ref http www.hydraulicspneumatics.com 200 Issue Article False ... cylinder, 8 stages, single acting, retracted and extended File 8 stage single acting air cylinder, Ergo Help.jpg thumb left pneumatic telescoping cylinder, 8 stages, single acting, retracted and extended ... of stages. There are exceptions however, with one pneumatic cylinder manufacturer successfully incorporating up to 9 stages in their cylinder designs. ref http www.ergo help.net pneumatic cylinders.html ... are the simplest and most common design. As with a single acting rod style cylinder, the single acting telescopic cylinder is extended using hydraulic or pneumatic pressure but retracts using ... to force the unpressurized hydraulic fluid out of the cylinder and cause it to retract to the fully ... Spider set up outside a building. This aerial platform vehicle uses a telescopic hydraulic cylinder to extend the platform Double Acting File EHTC.5DPL Cylinder, 5 Stage.jpg thumb left pneumatic telescoping cylinder 5 stage, double acting, demonstrating full extension and retraction A double acting cylinder is extended and retracted using hydraulic or pneumatic pressure in both directions. Double ... complexity is due to the requirement of adding retracting piston faces to all of the cylinder ... more details
italic title On the Sphere and Cylinder is a work that was published by Archimedes in two volumes c. 225 BC. ref Harvnb Dunham 1990 p 99 ref It most notably details how to find the surface area of a sphere and the volume of the contained ball mathematics ball and the analogous values for a cylinder geometry cylinder , and was the first to do so. ref mathworld urlname Sphere title Sphere Retrieved on 2008 06 22 ref Contents The principal formulae derived in On the Sphere and Cylinder are those mentioned above the surface area of the sphere, the volume of the contained ball, and surface area and volume of the cylinder. In his work, Archimedes showed that the surface area of a cylinder is equal to math A 2 pi r 2 2 pi r h 2 pi r r h . , math and that the volume of the same is math V pi r 2 h. , math ref Harvnb Dunham 1994 p 227 ref On the sphere, he showed that the surface area is four times the area of its great circle . In modern terms, this means that the surface area is equal to math 4 pi r 2. , math The result for the volume of the contained ball stated that it is two thirds the volume of a circumscribe d Cylinder geometry cylinder , meaning that the volume is math frac 4 3 pi r 3. math Archimedes was particularly proud of this latter result, and so he asked for a sketch of a sphere inscribed in a cylinder to be inscribed on his grave he had shown that both the volume and the surface area of the sphere were two thirds that of the cylinder. Later, Ancient Rome Roman philosophy philosopher Cicero Marcus Tullius Cicero discovered the tomb, which had been overgrown by surrounding vegetation. ref citation title Britannica Online contribution Archimedes His Works accessdate 2008 06 23 url http www.britannica.com EBchecked topic 32808 Archimedes 21480 His works ref ref383380&tocpanel sectionId toc214869 2CtocId toc214869 publisher Encyclop dia Britannica ref The argument Archimedes ... On The Sphere And Cylinder Category Ancient Greek mathematical works Category Euclidean geometry ... more details
The cylinder desk is a desk that resembles a Bureau Mazarin or a writing table equipped with small stacked shelves in front of the user s main work surface, and a revolving cylinder part that comes down to hide and lock up the working papers when the desk is not in use. File Cylinder desk David Roentgen M nchner Residenz DSC07473.JPG thumb 300px Like the rolltop desk , which was invented much later, the cylinder desk usually has a fixed work surface the paperwork does not have to be stored before the desk is shut. Some designs, however, have the capacity to slide the desk surface out a few inches to expand the available work area. The cylinder desk is also called bureau Kaunitz , as it was allegedly introduced in France in the first half of the 18th century by Wenzel Anton von Kaunitz , then the ambassador of the Habsburg Habsburg Empire to the French court. Regardless of the authenticity of its origin, the French court adopted this type of desk with great enthusiasm. The difficulty of producing wooden cylinder sections which would not warp over the years ensured that such desks were reserved for the rich and the very rich. A few variants of this form have slats instead of a one piece cylinder section. Image Cylinderdesksideinjpeg20031129.png The most famous cylinder desk, and perhaps the most famous desk of all times is the Bureau du Roi manufactured for the French royalty in the 18th century. Image Cylinderdeskfrontinjpeg20031129.png References Aronson, Joseph. The Encyclopedia of Furniture , 3rd edition. New York Crown Publishers Inc., 1965. Boyce, Charles. Dictionary of Furniture . New York Facts on File Inc., 1985. ISBN 0 8160 1042 0. Brunhammer, Yvonne Monique de Fayet. Meubles et ensembles, poque Louis XVI . Paris, ditions Charles Massin, 1965. Pages 59, 60, 61, 65. De Reyni s, Nicole. Le Mobilier Domestique Vocabulaire Typologique . Paris Imprimerie Nationale, 1987. Forrest, Tim and Paul J. Atterbury consulting editor . The Bulfinch Anatomy of Antique Furniture ... more details
Image 60163 Tornado cylinder rod.jpg thumb right 300px The motion on the left hand side of 60163 Tornado 60163 Tornado . The black casting to the left houses the cylinder, in which slides the piston the piston rod is immediately above the wheel. The Cylinder engine cylinder s of a steam locomotive are the components that convert the power stored in the steam into motion. Cylinders may be arranged in several different ways. Early locomotives On early locomotives e.g. Puffing Billy locomotive Puffing ... became more common in the UK but many inside cylinder engines continued to be built. Three or four ... V Four Cylinders, LMS Princess Royal Class Crank angles On a two cylinder engine the Crank mechanism ... that there are no dead centre s. On a three cylinder engine, two arrangements are possible cranks set to give six equally spaced impulses per revolution the usual arrangement. If the three cylinder axes are parallel, the cranks will be 120 degrees apart, but if the centre cylinder does not drive the leading driving axle, it will probably be inclined as on most US three cylinder locomotives and on some of Nigel Gresley Gresley s three cylinder locomotives in Great Britain , and the inside crank ... used on three cylinder compound locomotive s which used the outside low pressure cylinders for starting ... are also possible on a four cylinder engine all four cranks set at 90 degrees. With this arrangement the cylinders act in pairs, so there are four impulses per revolution, as with a two cylinder engine ... G Class . Inside cylinders On inside cylinder engines the valve gear is nearly always inside ... locomotive s which may have only one cylinder. The only conventional steam locomotive with one cylinder that is known is the Nielson One Cylinder Locomotive. ref cite web last Self first Douglas title The Nielson One Cylinder Locomotive. publisher date 27 May 2003 url http douglas self.com MUSEUM LOCOLOCO onecylinder onecylinder.htm accessdate 02 December 2010 ref See also Bore engine Cylinder bore ... more details
argue that the purpose of castling is nullified by all files being equivalent, as they are on the cylinder ... on the queen side has the rook on h1 moving to d1, king moves to c1. Some cylinder chess ... to capture the rook. Horizontal cylinder chess and toroidal chess Image Toroidal chessboard.jpg ... position br Torus chess on a standard board In horizontal cylinder chess , first and last rank are connected ... tags reflist External links http www.bcvs.ukf.net cylin.htm Cylinder chess by George Jelliss, Variant ... internet server to play Cylinder chess and many other chess variants http www.chessvariants.org ... more details
italictitle Taxobox name Cylinder image Conus textile archiepiscopus 001.jpg image caption Apertural view of gastropod shell shell of Cylinder textile Linnaeus, 1758 form archiepiscopus , which is equivalent ... familia Conidae subfamilia Coninae genus Cylinder genus authority Montfort, 1810 synonyms ref synonyms Cylinder is a proposed genus of sea snail s, marine ocean marine gastropod mollusk s in the family ... 429035 Cylinder Montfort, 1810 06 23 11 ref This genus currently November 2011 is still treated by some ... & Tenorio 2009 taxonomy distinguishes Cylinder from Conus in the following ways ref name Systematic ... gastropod gastropods including Conidae cones . ref name Systematic Genus Cylinder Montfort, 1810 Shell ... but one species in this genus are found in the Indo Pacific region Cylinder dalli is found in the Eastern ... in the World Register of Marine Species WoRMS list. Species within the genus Cylinder ... in the family ref name WoRMS Cylinder abbas Hwass in Brugui re, 1792 is equivalent to Conus abbas Hwass in Brugui re, 1792 Cylinder aureus Hwass in Brugui re, 1792 is equivalent to Conus aureus Hwass in Brugui re, 1792 Cylinder barbieri G. Raybaudi Massilia, 1995 is equivalent to Conus barbieri G. Raybaudi Massilia, 1995 Cylinder bengalensis Okutani, 1968 is equivalent to Conus bengalensis Okutani, 1968 Cylinder canonicus Hwass in Brugui re, 1792 is equivalent to Conus canonicus Hwass in Brugui re, 1792 Cylinder dalli Stearns, 1873 is equivalent to Conus dalli Stearns, 1873 Cylinder dondani Kosuge, 1981 is equivalent to Conus dondani Kosuge, 1981 Cylinder gloriamaris Chemnitz, 1777 is equivalent to Conus gloriamaris Chemnitz, 1777 Cylinder glorioceanus Poppe & Tagaro, 2009 is equivalent to Conus glorioceanus Poppe & Tagaro, 2009 Cylinder legatus Lamarck, 1810 is equivalent to Conus legatus Lamarck, 1810 Cylinder nodulosus G.B. Sowerby II, 1864 is equivalent to Conus nodulosus G.B. Sowerby II, 1864 Cylinder pacificus Moolenbeek & R ckel, 1996 is equivalent to Conus pacificus Moolenbeek ... more details
A Bubbler cylinder is a component of a unit for the chemical vapor deposition metal organic chemical vapor deposition MOCVD . They are devices that are used for conveying electronic grade organometallic chemistry metalorganic compound s from a liquid or solid precursor into a usable vapor . Apparatus The container of the Bubblers is similar to the construction of a gas washing bottle and used for the protected storage of metalorganic compounds to exclude air oxygen , moisture . The bubbler has a supply pipe and a sampling tube. The inlet tube ends just before the bottom of the tube. In this tube, an inert gas is introduced, which bubbles through the liquid chemical a solid chemical will Sublimation phase transition sublime . The mixture of the controlled inert gas and the vaporized chemical leaves the cylinder into a downstream reaction vessel. The temperature is controlled by a thermostat, so that a defined, constant steam pressure can be achieved. The supply of the often expensive and sensitive chemical is controlled by the regulated flow of inert gas and the temperature of the bubbler, resulting in a given vapor pressure of the chemical. The tube between the bubbler and the reactor has to have a higher temperature than the bubble, otherwise the precursor would condensation condense in the tube and therefore uncontrolled droplets would be passed into the reaction vessel. If this happens with a solid precursor, it could plug the line. Application For example, during the production of high brightness light emitting diode s, gallium or other group III V elements are epitaxially deposited onto a single crystal silicon substrate. The gallium is introduced into the MOVPE reactor chamber via a vapor. This vapor is generated by bubbling an inert carrier gas such as nitrogen or argon through a cylinder with a dip tube through a metalorganic precursor such as trimethylgallium ... articles liquid.pdf Liquid injection system based on Mass Flow Controller DEFAULTSORT Bubbler Cylinder ... more details
Refimprove date December 2009 In mathematics , specifically algebraic topology , the mapping cylinder of a function mathematics function math f math between topological space s math X math and math Y math is the quotient space quotient math M f 0,1 times X amalg Y , , sim math where the union is disjoint, and is the equivalence relation math 0,x sim f x quad text for each x in X. math That is, the mapping cylinder math M f math is obtained by gluing one end of math X math × math 0,1 math to math Y math via the map math f math . Notice that the top of the cylinder math 1 times X math is homeomorphic to math X math , while the bottom is the space math Y math . See ref Algebraic Topology by Allen Hatcher. Page 2 ref for more details. Basic properties The bottom Y is a deformation retract of math M f math . The projection math M f to Y math splits via math Y ni y mapsto y in Y subset M f math , and a deformation retraction math R math is given by math R M f times I rightarrow M f math math t,x ,s mapsto s cdot t,x math where points in math Y math stay fixed, which is well defined, because math 0,x s cdot 0,x math for all math s math . Interpretation The mapping cylinder may be viewed as a way to replace an arbitrary map by an equivalent cofibration , in the following sense Given a map math f colon X to Y math , the mapping cylinder is a space math M f math , together with a cofibration math tilde f colon X to M f math and a surjective homotopy equivalence math M f ... One can use the mapping cylinder to construct homotopy limits Citation needed date June 2010 given a diagram, replace the maps by cofibrations using the mapping cylinder and then take the ordinary pointwise ... cylinder is the homotopy pushout of the diagram where math f colon X to Y math and math text ... i Bigr 0,x i sim 1,f x i math References Reflist See also Mapping cylinder homological algebra DEFAULTSORT Mapping Cylinder Category Algebraic topology fr Cylindre d application pl Cylinder przekszta cenia ... more details
of the object in both directions on every particle in the cylinder wall. It can be described ... of the cylinder wall that has the following two lengths as sides t is the radial thickness of the cylinder l is the axial length of the cylinder An alternative to hoop stress in describing circumferential ... vessel math sigma theta dfrac Pr t math for a cylinder math sigma theta dfrac Pr 2t math for a sphere where P is the internal pressure t is the wall thickness r is the inside radius of the cylinder ... on them to develop a force along the axis of the cylinder. This is known as the axial stress and is usually ... walled vessels When the cylinder to be studied has a r t ratio of less than 10 often cited as 20 the thin walled cylinder equations no longer hold since stresses vary significantly between inside .... For example, the simplest case is a solid cylinder if math R i 0 math then math B 0 math and a solid cylinder cannot have an internal pressure so math A P o math Practical effects Engineering ... more details
A Tipler cylinder is a cylinder of dense matter of infinite length, rotating about its longitudinal axis. This hypothetical object is Theory theorized to allow time travel and is also called a Tipler time machine . While references to infinite length cylinders can be found in literature back to 1936 ref name stockum cite journal first Willem Jacob last van Stockum authorlink Willem Jacob van Stockum url http www lorentz.leidenuniv.nl history stockum Proc R Soc Edinb 57 135 1937.jpg title The Gravitational Field of a Distribution of Particles Rotating about an Axis of Symmetry year 1936 journal Proceedings of the Royal Society of Edinburgh ref ref name lanczos cite journal first Kornel last Lanczos authorlink Kornel Lanczos doi 10.1023 A 1010277120072 title On a Stationary Cosmology in the Sense of Einstein s Theory of Gravitation year 1924, republished in 1997 journal General Relativity and Gravitation publisher Springland Netherlands volume 29 issue 3 pages 363 399 ref , it was Frank Tipler in 1974 who recognized it would allow closed timelike curves ref name tipler paper cite journal first Frank last Tipler authorlink Frank J. Tipler url http www.geocities.com theophysics tipler rotating cylinders.pdf title Rotating Cylinders and the Possibility of Global Causality Violation journal Physical Review D volume 9 year 1974 pages 2203 2206 doi 10.1103 PhysRevD.9.2203 archiveurl http www.webcitation.org query?url http www.geocities.com theophysics tipler rotating cylinders.pdf&date 2009 10 25 23 01 39 archivedate 2009 10 26 bibcode 1974PhRvD...9.2203T issue 8 Available in Graphics Interchange Format GIF format here pages http www.vialattea.net curvatura articoli t1.gif 1, http ......9.2203T here. ref and thus allow time travel. Tipler s solution was for a cylinder of infinite length. He suggested that a finite cylinder might produce closed timelike curves if the rotation rate ... comic includes a Tipler cylinder created as a work of art comic 569 . ref http starslip.com 2007 ... more details
Image Nabonidus cylinder sippar bm1.jpg thumb The Nabonidus Cylinder British Museum copy The Nabonidus Cylinder from Sippar is a long text in which king Nabonidus of Babylonia 556 539 BC describes how he repaired three temples the sanctuary of the moon god Sin mythology Sin in Harran , the sanctuary of the warrior goddess Anunitu in Sippar , and the temple of Shamash ama in Sippar. The Nabonidus cylinder from Ur is particularly noteworthy because it mentions a son named Belshezzar , ref name livius.org http www.livius.org na nd nabonidus cylinder.html ref who is mentioned in the Book of Daniel . The cylinder states blockquote As for me, Nabonidus, king of Babylon, save me from sinning against your great godhead and grant me as a present a life long of days, and as for Belshazzar, the eldest son my offspring instill reverence for your great godhead in his heart and may he not commit any cultic mistake, may he be sated with a life of plenitude. ref http www.livius.org na nd nabonidus cylinder ur.html The translation of the Nabonidus Cylinder was made by Paul Alain Beaulieu , who is also ... the Ashurna irpal temple in Nimrud , the cylinder of Ashurbanipal at Kouyunjik , and the unique and historically ... April 4, 2011. ref The cylinder excavated in Babylon , in the royal palace, is now in the Pergamon Museum ... Cyrus the Great , who is mentioned as an instrument of the gods. The Nabonidus Cylinder contains echoes ... Cyrus Cylinder a lengthy titulary, a story about an angry god who has abandoned his shrine, who is reconciled ... the daily offerings. Prayers are also included. Translation The translation of the Nabonidus Cylinder ... highlight objects me c cylinder of nabonidus.aspx Cylinder of Nabonidus at the British Museum . http www.livius.org na nd nabonidus cylinder.html Nabonidus Cylinder from Sippar Translation. http www.livius.org na nd nabonidus cylinder ur.html Nabonidus Cylinder from Ur Translation of a related document ... corpora documents Cylinder Category Ancient Near and Middle East clay objects Category Middle Eastern ... more details
Mesopotamian myth 7 The Barton Cylinder is a Sumerian language Sumerian creation myth , written on a clay cylinder in the mid to late 3rd millennium Anno Domini BC , which is now in the University of Pennsylvania Museum of Archaeology and Anthropology. Joan Goodrick Westenholz suggests it dates to around 2400 BC ref name Borr sBarcelona2000 cite book author1 Miguel ngel Borr s author2 Centre de Cultura Contempor nia de Barcelona title La fundaci n de la ciudad mitos y ritos en el mundo antiguo url http books.google.com books?id 3yPVFGPr0aoC&pg PA46 accessdate 24 May 2011 year 2000 publisher Edicions UPC isbn 9788483013878 pages 46 ref Description The cylinder is inscribed with a Sumerian language Sumerian cuneiform script cuneiform mythological text, found at the site of Nippur in 1889 during excavations conducted by the University of Pennsylvania . The cylinder takes its name from George Aaron Barton George Barton , who was the first to publish a transcription and translation of the text in 1918 in Miscellaneous Babylonian Inscriptions . ref name Barton George Aaron Barton, http books.google.com books?id nn5hAAAAMAAJ&printsec frontcover&dq miscellaneous babylonian inscriptions&source bl&ots f9Tqkb8rHg&sig fNUlMe6MbiOARgsCsZH2pRSs528&hl en&ei ssvVS43MFYSclgfGr7W6CQ&sa X&oi book result&ct result&resnum 1&ved 0CAYQ6AEwAA v onepage&q&f false Miscellaneous Babylonian Inscriptions Yale ... to it as The Nippur Cylinder and suggested it may date as far back as 2500 BC. ref cite book ... 1605060491 page 28 url http books.google.co.uk books?id t16tDOHZLLEC&pg PA28&dq 22Nippur cylinder ... 22Nippur 20cylinder 22&f false ref The cylinder dates to the Old Babylonian period, but Falkenstein ..., The Barton Cylinder, Acta Sumeriologica 16 1994 15 46. http cdl.museum.upenn.edu s x resources barton ... index.php?SearchMode Browse&ResultCount 1&txtID Txt P222183 CDLI The Barton Cylinder http dcsl.orinst.ox.ac.uk catalogue MBI1.PSARG.BAB.xml A Ninurta narrative the Barton cylinder , The Diachronic ... more details
Unreferenced date January 2010 In geometry and topology , trivial cylinders are certain pseudoholomorphic curve s appearing in certain cylindrical manifold s. In Floer homology and its variants, chain complexes or differential graded algebras are generated by certain combinations of closed orbits of vector fields . In symplectic Floer homology, one considers the Hamiltonian vector field of a Hamiltonian function on a symplectic manifold in symplectic field theory , contact homology , and their variants, one considers the Reeb vector field associated to a contact form , or more generally a stable Hamiltonian structure . The differentials all count some flavor of pseudoholomorphic curve s in a manifold with a cylindrical almost complex structure whose ends at negative infinity are the given collection of closed orbits. For instance, in symplectic Floer homology, one considers the product of the mapping torus of a symplectomorphism with the real numbers in symplectic field theory, one considers the symplectization of a contact manifold. The product of a given embedded closed orbit with R is always a pseudoholomorphic curve, and such a curve is called a trivial cylinder . Trivial cylinders do not generally contribute to the aforementioned differentials, but they may appear as components of more complicated curves which do. Category Algebraic geometry Category Complex manifolds Category Symplectic topology ... more details
Editorial date December 2009 crystal date November 2011 Digital preservation is the set of processes ... of digital preservation is to preserve materials resulting from digital reformatting , and particularly ... lifecycle of digital information, preservation is an ongoing process. ref cite web url http eprints.ucl.ac.uk ..., preservation is no longer just the product of a program but an ongoing process. In this regard ... of digital information is assisted by the inclusion of preservation metadata . Digital preservation ... Preservation Concerns Society s heritage has been presented on many different materials, including stone ... and keep it up to date, but at the same time brings many difficulties in the preservation of this content. Margaret Hedstrom points out that ...digital preservation raises challenges of a fundamentally .... ref Hedstrom, M. 1997 . Digital preservation a time bomb for Digital Libraries. Retrieved on December ... already be data loss. This characteristic of digital forms leaves a very short time frame for preservation ... Preservation of Local Born Digital Resources. Arkansas Libraries v. 64 no. 3 Fall 2007 p. 5 7 ref ..., and administration of intellectual property rights and that ...digital preservation remains ..., the Online Computer Library Center developed a four point strategy for the long term preservation ... content objects to determine what type and degree of format conversion or other preservation ... Digital Archive Preservation Policy and Supporting Documentation , p. 5 ref There are several additional ... iris tutorial dpm eng index.html Digital Preservation Management Implementing ... data from an old preservation CD to a new one. This strategy may need to be combined with migration ... Technological Quicksand Finding a Viable Technical Foundation for Digital Preservation url http ... strategy for retaining the functionality of old video game systems, such as with the MAME project ... 2001 title http doi.acm.org 10.1145 379437.379726 Long Term Preservation of Digital Information ... more details
project http www.folkstreams.net . The purpose of the site is to supplement already existing Film Preservation ... of archivists by supporting collaborative preservation, access, digitization, education, and metadata ...image Filmdaase.jpg thumb 300px Stacked containers filled with reels of film stock The film preservation , or film restoration , movement is an ongoing project among film historians, archivists, museum ... which they contain. In the widest sense, preservation nowadays assures that a movie will continue ... ref For many years the term preservation used to be a synonym of duplication only. The preservationist s goal was to create a durable copy without significant loss of quality. Film preservation now ... and share the content with the public. ref The Film Preservation Guide The Basics for Archives, Libraries and Museums. National Film Preservation Foundation. San Francisco, CA, 2004. ref Film preservation ... hearing statement to the National Film Preservation Board of the Library of Congress, Washington ... , proper preservation of film usually involves storing the original negatives when they have survived ... syndrome . Indeed the preservation of color films has now been found to involve a compromise, because ..., while higher normal room temperatures cause color fading. Decay prevention Preservation of film ... and copying the actual film element. Preservation is different from restoration. Restoration is the act ... involves combining various fragments of film elements. In most cases, when a film is chosen for preservation ... master may be either a duplicate negative or a fine grain master positive . Preservation elements ... to future generations. When restoration and preservation budgets are lower the images are transferred ... of 100 years. Today it is universally agreed that the foundation of film preservation is proper protection .... Movies Deemed Peculiarly Worthy of Preservation Will Be Treated to Last Forever. Screen Cornerstones ... was used to copy these images onto safety film stock, a project begun in 1947 and continuing today ... more details
Encyclopedia
top
