Image Aperture card.JPG 400px right An aperturecard is a type of punched card with a cut out window into which a chip of microform microfilm is mounted. Such a card is used for archive archiving or for making multiple inexpensive copies of a document for ease of distribution. The card is typically punched ... paper first Ed last LoTurco title The Engineering ApertureCard Still Active, Still Vital publisher ...&PRODUCT 3C 3Eprd id 845524441761057 Oce ref Aperturecard plotters are machines that use a laser to create the image on the film. ref For example, this aperturecard plotter from http www.wwl.co.uk ... of the card for visual identification. The microfilm chip is most commonly 35mm in height, and contains ... drawing , that is the focus of the archiving process. Aperture cards have several advantages ..., sort, duplicate, create, and digitize cards with a high level of automation. While many aperture ... systems. Usage Aperture cards are used for engineering drawings from all engineering disciplines. The U.S. Department of Defense once made extensive use of aperture cards, and some are still in use, but most ... use of aperture cards ref Information about the drawing, for example the drawing number, could be both punched and printed on the remainder of the card. With the proper machinery, this allows for automated ... and a light source. Advantages Aperture cards have, for archival purposes, some advantages over digital ... mis filing cards after use, particularly in large archives, results in the card being for all intents and purposes lost forever unless it s later found by accident. Aperture cards created from 35mm roll film mounted on to blank cards have to be treated with great care. Bending the card can cause .... Feeding a de laminated card through machinery not only risks destroying the image it also risks ... or other punched data using a IBM 80 series Card Sorters card sorter . Machines are now available that Image scanner scan aperture cards and produce a digital version. ref For example, this aperture ... more details
other uses Image Aperures.jpg thumb A large 1 and a small 2 aperture Image Aperture in Canon 50mm f1.8 II lens.jpg thumb right Aperture mechanism of Canon 50mm f 1.8 II lens Image ApertureDefn1707.png right thumb 244px Definitions of Aperture in the 1707 Glossographia Anglicana Nova ref Thomas Blount .... Gregory, Mr. Lock, Mr. Evelyn, Mr. Dryden, Mr. Blunt, &c. , London, 1707. ref In optics , an aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical ... optics focus in the image plane . The aperture determines how collimated the admitted rays are, which is of great importance for the appearance at the image plane. If an aperture is narrow, then highly collimated rays are admitted, resulting in a sharp focus at the image plane. If an aperture ... focal length. This means that a wide aperture results in an image that is sharp around what the lens is focusing on and blurred otherwise. The aperture also determines how many of the incoming rays are actually admitted and thus how much light reaches the image plane the narrower the aperture, the darker ... , and the aperture stop is the stop that determines the ray cone angle, or equivalently the brightness, at an image point. In some contexts, especially in photography and astronomy , aperture refers to the diameter of the aperture stop rather than the physical stop or the opening itself. For example, in a telescope the aperture stop is typically the edges of the objective lens or mirror or of the mount that holds it . One then speaks of a telescope as having, for example, a 100 centimeter aperture . Note that the aperture stop is not necessarily the smallest stop in the system. Magnification and demagnification by lenses and other elements can cause a relatively large stop to be the aperture stop for the system. Sometimes stops and diaphragms are called apertures, even when they are not the aperture stop of the system. The word aperture is also used in other contexts to indicate a system ... more details
other uses Aperture disambiguation Infobox Software developer Apple Inc. logo Image Aperture Icon.png 64px 64px Apple Aperture screenshot Image Apple Aperture.jpg 270px Aperture caption Aperture 3, demonstrating ... Proprietary website URL http www.apple.com apertureAperture is a photo editing software photo editing ... article 48600 2005 12 aperture.html title Macworld Aperture 1.0.1 Review publisher Macworld.com ... Store . ref cite web url http itunes.apple.com nl app aperture id408981426?mt 12 title Aperture in the Mac ... corrective adjustments, displaying slideshow s, and printing photographs. Features of Aperture include ... popular websites, including Flickr , Facebook , SmugMug , and Apple s MobileMe service. Aperture 3 ... App Store. ref cite web url http itunes.apple.com us app aperture id408981426?mt 12 title Aperture ... http support.apple.com kb HT4176 title Aperture 3 Tips on tethered shooting publisher apple.com date ... into the Aperture library. Raw Fine Tuning, allowing versions of raw decode to be managed over ... USB and IEEE 1394 interface FireWire memory card readers or directly from a camera connected via USB .... Aperture 2.0 Aperture 2.0 was released on February 12, 2008 with a reduced US price of 199. ref ... Macworld Aperture 2 Review publisher Macworld.com date 2008 03 12 accessdate 2011 02 15 ref This can ... iLife and iWork. Support for editing plug ins, including Apple s own dodging and burning tool Aperture 2.1 . ref cite web url http www.apple.com aperture resources plugins.html title Aperture Resources Plug ins publisher Apple.com date accessdate 2011 02 15 ref Aperture 3.0 Aperture 3.0 was released ... news releases apple releases aperture 3 83877837.html title Apple Press Statement location California publisher Prnewswire.com date accessdate 2011 02 15 ref and is the first version of Aperture ... as follows ref cite web url http www.apple.com aperture features title Apple s feature list publisher ... for download. ref cite web url http aperturepresets.tumblr.com title Custom Aperture presets for download ... more details
wiktionarypar aperture The aperture of an optical system is the opening that limits the amount of light that can pass through. Aperture may also refer to TOC right Do not add Aperture Science in this article. It is not ambiguous with aperture . Per WP MOSDAB , it does not belong on this disambiguation page see talk page for details. Science and technology Aperture antenna , a physical parameter of an antenna Aperture mollusc , the main opening in the shell of a gastropod or scaphopod mollusc Aperture botany , a weaker spot in the wall of a pollen grain Numerical aperture is a parameter used to describe optical systems Computers Aperture computer memory , a region of the physical address space that opens access to a particular device or memory unit Aperture software , an image organization and editing program for photographers, sold by Apple Inc. Other Aperture typography , an enclosed loop in a typographical symbol such as the lower part of the letter a Aperture magazine Aperture magazine , a long running art photography magazine See also Lookfrom Aperture Includes links to Aperture Science and Aperture Laboratories Intitle Aperture disambig bg cs Clona rozcestn k de Apertur Begriffskl rung es Apertura desambiguaci n nl Apertura ru uk ... more details
Image Angular aperture.svg right The angular aperture of a thin lens with focal point at F and an aperture of diameter math d math . thumb 250px The angular aperture of a lens optics lens is the apparent angle of the lens aperture as seen from the Focus optics focal point math a 2 arctan left frac D 2 f right math where math f math is the focal length math D math is the diameter of the aperture . Relation to numerical aperture In a medium with an index of refraction close to 1, such as air, the angular aperture is approximately equal to twice the numerical aperture of the lens. ref cite book title Studies in Optics author Albert Abraham Michelson year 1995 publisher Courier Dover pages 32 isbn 0 486 68700 7 url http books.google.com books?id m2tUZ4 8WGMC&pg PA32&dq 22Angular aperture 22&ie ISO 8859 1&output html ref Formally, the numerical aperture in air is math mathrm NA sin a 2 sin arctan left frac D 2 f right math In the paraxial approximation , with a small aperture, math D f math math mathrm NA approx a 2 math References reflist See also f number Numerical aperture Category Optics Category Angle de ffnungswinkel es Apertura angular it Apertura angolare nl Openingshoek zh ... more details
advert date April 2011 Refimprove date January 2010 Image vt 1.jpg thumb Aperture Gallery in Chelsea, 547 W 27th Street The Aperture Foundation was founded in 1952 by Ansel Adams , Minor White , Barbara Morgan photographer Barbara Morgan , Dorothea Lange , Nancy Newhall , Beaumont Newhall , Ernest Louie, Melton Ferris, and Dody Warren. Their vision was to create a forum for fine art photography, a new concept at the time. The first issue of Aperture magazine was published in spring 1952 in San Francisco. Aperture s efforts increased respect for photography and its popularity among contemporary ... 2010 10 23 chris boot executive director at aperture ref Aperture is a not for profit. The foundation ... have always defined Aperture Foundation, as expressed by the mission statement blockquote The purpose of Aperture Foundation, a non profit organization, is to advance photography in all its forms and to foster the exchange of ideas among audiences worldwide. blockquote Books Aperture is known as publisher ... diane arbus an aperture monograph.html ref Several of Aperture s approximately 20 new titles a year ... two or three new books are the first ever for the artist in question. Aperture also supports .... Exhibitions In 2005, Aperture s three thousand square foot gallery opened in New York s Chelsea art district. ref name aperture http www.aperture.org about ref Many of the shows travel, to a total of more than 25 venues in the U.S. and abroad each year. Aperture s Chelsea gallery regularly ... City. Selection Aperture has exhibited an eclectic and critically acclaimed array of shows, including ... by Josef Koudelka. ref name aperture File Aperture Gallery2.jpg thumb Aperture Gallery in Chelsea, 547 W 27th Street References references External links http www.aperture.org Aperture Foundation Website http thephotobook.wordpress.com 2010 10 23 chris boot executive director at aperture Chris Boot Director Announcement http www.aperture.org diane arbus an aperture monograph.html Diane Arbus Monograph ... more details
Orphan date September 2008 Dynamic aperture is a term in acoustics used very much like aperture in photography. The arrays in side scan sonar can be programmed to transmit just a few elements at a time or all the elements at once. The more elements transmitting, the narrower the beam and the better the Audio bit depth resolution . The ratio of the aperture size to the imaging depth is known as the F number. Dynamic aperture is keeping this number constant by growing the aperture with the imaging depth until the physical aperture cannot be increased. A modern medical ultrasound machine has a typical F number of 0.5. Side Scan Sonar systems produce images by forming angular beams . Beam width is determined by length of the sonar array, narrower beams resolve finer detail. Longer arrays with narrower beams provide finer spatial resolution. Missing image removed Image beam.jpg Category Acoustics physics stub ... more details
Nasal aperture may refer to Posterior nasal apertures Anterior nasal aperture disambig Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ... more details
, which has a large aperture and a pronounced parietal callus . The aperture is an opening in certain ... emerges for locomotion, feeding, etc. The term aperture is used for the main opening in gastropod ... a main anterior aperture and a smaller posterior aperture. As well as the aperture, some gastropod shells ... called orifices. In gastropods In some prosobranch gastropods, the aperture of the shell can be closed, and even completely sealed, with a sort of door or operculum gastropod operculum . The aperture ... roughly to the cross section of the body whorl of the shell. The aperture of a snail shell can have many other forms semicircular, trilobate or auriculate . In some gastropods, the aperture is narrowed ... layers to the aperture margin also called peristome from the mantle border, the principal agent in the secretion of the shell. Terminology The margin of the aperture is sometimes continuous or entire ... side of the aperture being formed only by the body whorl. For convenience of reference, the margin of a gastropod aperture is divided into three areas The parietal wall with the outer lip labrum the area ... at its base. The palatal wall the outer free wall of the final whorl of the shell. The aperture ... . Shape The shape of the aperture can be auriform, ear shaped, as in Auriculella bean for example ... Aperture shape&state Bean Aperture shape Bean . accessed 3 January 2011. ref circular, rotundate, orbicular. claw shaped aperture Some Melongenidae have a claw shaped aperture. crescent examples ... Molluscs&character Aperture shape&state Crescent Aperture shape Crescent . accessed 3 January 2011. ref distorted aperture Personidae has a distorted aperture. linear, narrow. Cypraea , Conus ... Aperture shape&state Half moon Aperture shape Half moon . accessed 3 January 2011. ref . Nerita ... ref http www.discoverlife.org mp 20q?act x show state&guide Molluscs&character Aperture shape&state Oval or teardrop Aperture shape Oval or teardrop . accessed 3 January 2011. ref ovate, egg shaped ... more details
maximum aperture in hopes of getting enough light for a good exposure. In addition, aperture priority ... its aperture range for a given focal length of the lens. Commonly, lenses provide greatest Angular ... DEFAULTSORT Aperture Priority Category Photography equipment Photo stub be x old de Zeitautomatik ru fi Aukkoautomatiikka sv Slutartidsautomatik th Aperture ... more details
italic title Aperture is a quarterly photography magazine and a book publisher based in Chelsea, Manhattan New York , New York . The magazine is published by Aperture Foundation , a non profit organization devoted to fine art photography . Magazine Inspired by the production quality of Alfred Stieglitz s then defunct Camera Work , Aperture magazine was founded by Minor White , Ansel Adams , Dorothea Lange , Barbara Morgan photographer Barbara Morgan , Nancy Newhall and Beaumont Newhall . ref name ap http www.aperture.org Aperture.org official site ref White, himself a photographer, edited the magazine from its first issue in 1952 until 1975. ref name glbtq cite web url http www.glbtq.com arts white m.html title Minor White 1908 1976 last Lockard first Ray Anne work glbtq.com date 2002 accessdate 2010 04 21 ref He died in 1976. The first iteration of the magazine closed in 1964. Hoffman, a close friend and former student of then editor White, later restored the magazine, becoming its publisher ... houses in the United States and Europe. Aperture agreed to publish Arbus catalog and it was released in time for the show as Diane Arbus An Aperture Monograph . Book publisher Aperture s book publication program began in 1965, with Edward Weston The Flame of Recognition , which became one of Aperture s best selling titles. ref name ap In 1984, Aperture also published The Golden Age of British Photography, 1839 1900 , which featured restored, British Victorian era Victorian Era photography. Aperture Foundation As of 2009, Both Aperture magazine and its book publishing arm are run by the nonprofit arts institution the Aperture Foundation. In 2003, the Foundation instituted the first Aperture Michael E. Hoffman Award, in memory of Michael E. Hoffman died 2001 , who was Aperture s publisher for 37 years. The Aperture Foundation sponsors limited edition portfolios, lectures, conferences and touring ... in 1952 Category Magazines published in New York es Aperture revista ... more details
File CRT Phosphors.jpg 180px thumb Aperture grille based CRT in close up File Trinitron computer.JPG thumb right 180px Sony Trinitron aperture grille computer monitor Image Aperture grille closeup teletext.jpg 180px thumb Aperture grille based CRT in close up, showing the letter e from a teletext page An aperture grille tension mask is one of two major technologies used to manufacture color cathode ray tube CRT television s and computer display s the other is shadow mask . Fine vertical wires behind the front glass of the display screen separate the different colors of phosphor s into strips. These wires are positioned such that an electron beam from one of three guns at the rear of the tube is only able to strike phosphors of the appropriate color. That is, the blue electron gun will strike blue phosphors, but will find a wire blocks the path to red and green phosphors. The fine wires allow for a finer dot pitch as they can be spaced much closer together than the perforations of a shadow mask, and there need be no gap between adjacent horizontal pixels. During the display of bright images, a shadow mask warms, and expand outward in all directions sometimes called blooming . Aperture .... The vertical wires of the aperture grille have a resonant frequency and will vibrate in Acoustic ... aperture grille and shadow mask displays at a glance. The stabilized grille can still vibrate but the sounds need to be loud and close to the display. Additionally, aperture grille displays tend to be vertically ... have a spherical curvature . The first patent ed aperture grille televisions were manufactured by Sony .... Cromaclear is an improvement of the aperture grille technology, pioneered by the NEC Corporation one of its advantage is the lack of the damping wires. While many considered aperture grille technology ... links http www.monitorworld.com faq pages q28 page.html Aperture grille details Category Cathode ray tube de Streifenmaske es Rejilla de apertura it Aperture grille ja ru ... more details
Infobox Brain Name Lateral aperture Latin apertura lateralis ventriculi quarti GraySubject 187 GrayPage 798 Image Lateral ventricle.gif Caption Three dimensional space Three dimensional representation of the ventricular system of the human brain. The fourth ventricle is the lower blue mass. The little points sticking out on the left and right are the two parts of the lateral recess, which end in the foramen of Luschka. Image2 Human caudal brainstem posterior view description.JPG Caption2 Human caudal brainstem posterior view Lateral aperture is 18 IsPartOf Components Artery Vein Acronym LA4V BrainInfoType hier BrainInfoNumber 637 MeshName MeshNumber DorlandsPre a 51 DorlandsSuf 12144677 The lateral aperture is a paired structure in human anatomy. It is an opening in each lateral extremity of the lateral recess of the fourth ventricle of the human brain , which also has a single median aperture . The two lateral apertures provide a conduit for cerebrospinal fluid to flow from the brain s ventricular system into the subarachnoid space specifically into the cerebellopontine angle . The structure is also called the lateral aperture of the fourth ventricle or the foramen of Luschka after anatomist Hubert von Luschka . ref http www.whonamedit.com synd.cfm 2391.html Hubert Von Luschka at whonamedit.com ref References reflist Gray s Fourth ventricle Category Nervous system neuroscience stub nl Apertura lateralis ventriculi quarti ro Orificiu Luschka ... more details
unreferenced date April 2011 Aperture synthesis or synthesis imaging is a type of interferometry that mixes ... astronomy observations. Technical issues Aperture synthesis is possible only if both the amplitude ..., a very demanding technology which became possible only in the 1990s. This is why imaging with aperture ... at once, and can give high quality images. Differences Image Earth rotation aperture synthesis.jpg thumb 300px Most aperture synthesis interferometers use the rotation of the Earth to increase the number .... Most aperture synthesis interferometers use the rotation of the Earth to increase the number of different ... array instead of Earth rotation, such as in Aperture Masking Interferometry aperture masking interferometry . History Aperture synthesis imaging was first developed at radio wavelengths ... aperture synthesis to create a One Mile and later a 5 km effective aperture using the One .... Aperture synthesis is also used by a type of radar system known as synthetic aperture radar , and even ... from a conventional telescope with an aperture diameter equal to the maximum baseline, hence the name aperture synthesis . It was rapidly discovered that in many cases useful images could be made ... acknowledges the shift in emphasis from trying to synthesise the complete aperture allowing image reconstruction ..., using powerful but computationally expensive algorithms. Other wavelengths Aperture synthesis imaging has been demonstrated in the optical and infrared, first using aperture masking interferometry and later ... have released aperture synthesis images Cambridge Optical Aperture Synthesis Telescope COAST , Navy ... Interferometer ISI . See also Synthetic array heterodyne detection SAHD Interferometric synthetic aperture radar IfSAR or InSAR Synthetic aperture radar SAR and Inverse synthetic aperture radar ISAR Synthetic aperture sonar Beamforming Synthetic Aperture Magnetometry Synthetic aperture magnetometry Light field External links http www.webcitation.org 5kmnhRe25 Further details of aperture synthesis ... more details
Infobox Brain Name PAGENAME Latin apertura mediana ventriculi quarti GraySubject 187 GrayPage 798 Image Gray708.svg Caption Scheme of roof of fourth ventricle . The arrow is in the foramen of Magendie . Image2 Caption2 IsPartOf Components Artery Vein BrainInfoType hier BrainInfoNumber 638 MeshName MeshNumber DorlandsPre a 51 DorlandsSuf 12144687 The median aperture medial aperture, Foramen of Magendie drains CSF from the fourth ventricle into the cisterna magna . The two lateral aperture s foramina of Luschka , one on the left and one on the right, are the primary routes for drainage of cerebrospinal fluid from the fourth ventricle into the cerebellopontine angle cistern . The foramen on axial images is posterior to the pons and anterior to the Caudal anatomical term caudal cerebellum . Eponym The Foramen of Magendie is named for Fran ois Magendie , who first described it. ref WhoNamedIt synd 2388 ref Addtional images gallery File Slide3qq.JPG Median aperture gallery References reflist Netter, Frank H. 1989 Atlas of Human Anatomy . Summit, NJ Ciba Geigy Corporation. Williams, Peter L. Warwick, Roger Dyson, Mary & Bannister, Lawrence H. 1989 Gray s Anatomy 37th ed. . New York Churchill Livingstone. External links RocheLexicon 13048.000 3 Fourth ventricle Category Central nervous system neuroscience stub it Foro di Magendie nl Apertura mediana ventriculi quarti pt Abertura mediana ro Orificiul Magendie vi L gi a ... more details
Context date February 2008 Refimprove date July 2007 File Coded aperture mask for gamma camera .jpg thumb Coded aperture mask for gamma camera for SPECT Coded Apertures or Coded Aperture Masks are grids, gratings, or other patterns of materials opaque to various wavelengths of light. The wavelengths are usually high energy radiation such as X rays and gamma rays . By blocking and unblocking light in a known pattern, a coded shadow is cast upon a plane of detectors. Using computer algorithms, properties of the original light source can be deduced from the shadow on the detectors. Coded apertures are used in X and gamma rays because their high energies pass through normal lenses and mirrors. Rationale Image formation, normally done at optical wavelengths by lenses and mirrors, must be done for non focusable wavelengths via image modulation. The pinhole camera is the most basic form of such a modulation imager, but a single aperture mask can contain many holes, in one of several particular patterns, to improve the throughput for hard X ray s and Gamma ray &gamma rays , for example. Multiple masks, at varying distances from a detector, add flexibility to this tool. Specifically the modulation collimator , invented by Minoru Oda , was used to identify the first cosmic X ray source and thereby to launch the new field of X ray astronomy in 1965. Many other applications in other fields, such as tomography , have since appeared. In a coded aperture more complicated than a pinhole camera , images from multiple apertures will overlap at the plate or detector array. It is thus necessary to use a computational algorithm which depends on the precise configuration of the aperture arrays ... can be applied. The coded aperture imaging technique is one of the earliest forms of computational .... URA MURA Levin Veeraraghavan Coded Aperture Space Telescopes Rossi X ray Timing Explorer ASM BeppoSAX ... ray computed tomography External links Coded Aperture Imaging in High Energy Astronomy http astrophysics.gsfc.nasa.gov ... more details
Refimprove date December 2009 In electromagnetics and antenna radio antenna theory, antenna aperture or effective area is a measure of how effective an antenna is at receiving the power of radio wave s. The aperture ... density PFD watts per square metre, the antenna s aperture A sub eff sub in square metres is given ... is equal to the power density of the radio waves in watts per square metre, multiplied by its aperture in square metres. The larger an antenna s aperture is, the more power it can collect from a given ... advantage of its maximum gain. Aperture efficiency In general, the aperture of an antenna is not directly ... antenna horns , have a physical aperture opening which collects the radio waves. In these aperture antennas , the effective aperture A sub eff sub must always be less than the area of the antenna s physical aperture A sub phys sub , as can be seen from the definition above. An antenna s aperture ... The aperture efficiency is a dimensionless parameter between 0 and 1.0 that measures how far the antenna falls short of using all the radio power entering its physical aperture. If the antenna were perfectly efficient, all the radio power falling within its physical aperture would be converted to electrical ... A sub eff sub A sub phys sub and the aperture efficiency would be 1.0. But all antennas have ... by its Antenna feed feed , and radio waves scattered by structural supports and diffraction at the aperture edge, which reduce the power output. Aperture efficiencies of typical antennas vary from 0.35 to 0.70 but can range up to 0.90. Aperture and gain The directivity of an antenna, its ability to direct ... equally well from all directions. It can be shown that the aperture of a lossless isotropic antenna ... of the radio waves. So the gain of any antenna is proportional to its aperture math G frac 4 pi ..., the gain and aperture are understood to refer to the antenna s axis of maximum gain, or boresight ... in watts A sub r sub is the aperture of the receiving antenna in m sup 2 sup A sub t sub is the aperture ... more details
Image Numerical aperture.svg right thumb The numerical aperture with respect to a point P depends on the half ... aperture NA of an optical system is a dimensionless number that characterizes the range of angles ... between different areas of optics. Numerical aperture is commonly used in microscopy to describe the acceptance ... In most areas of optics, and especially in microscopy , the numerical aperture of an optical system ... across an interface. In air, the angular aperture of the lens is approximately twice this value within ... 2NA, where is the wavelength of the light. A lens with a larger numerical aperture will be able to visualize finer details than a lens with a smaller numerical aperture. Assuming quality diffraction ... a brighter image, but will provide shallower depth of field . Numerical aperture is used to define ... DVD and Blu ray by Steve Kindig, Crutchfield Advisor . Accessed 2008 01 18. ref Numerical aperture versus f number Image Numerical aperture for a lens.svg thumb 250px right Numerical aperture of a thin lens . Numerical aperture is not typically used in photography . Instead, the angular aperture ... N f D math This ratio is related to the image space numerical aperture when the lens is focused at infinity. ref name Greivenkamp Based on the diagram at the right, the image space numerical aperture ... holds when the numerical aperture is small, but it turns out that for well corrected optical systems ... aperture may be more meaningful. Working or effective f number The f number describes the light ... the light gathering ability of the lens or the image side numerical aperture. In this case, the numerical aperture is related to what is sometimes called the working f number or effective f number ...&pg PA29&dq inauthor greivenkamp numerical aperture p. 29. ref ref cite book title Field Guide ... aperture ref The magnification here is typically negative in photography, the factor is sometimes ..., the object side numerical aperture is related to the f number by way of the magnification tending ... more details
About pollen structure stomatal aperture Stoma Apertures are very small spots on the walls of a pollen , where the wall is thinner and or softer. For germination it is necessary that the pollen tube can reach out from the inner of the pollen and transport the chromosome s to the egg deep down in the Carpel pistil . The apertures are the places where the pollen tube is able to break through the elsewhere very tough pollen wall. The number and configuration of apertures are often very exactly defined for and characteristic for different groups of plants. The biggest class of plant species, Eudicots Eudicotyledonae has three apertures in each pollen. References citation pmid 9735262 year 1998 month Jul author Ressayre, A Godelle, B Mignot, A Gouyon, Ph title A Morphogenetic Model Accounting for Pollen Aperture Pattern in Flowering Plants volume 193 issue 2 pages 321 334 doi 10.1006 jtbi.1998.0704 journal Journal of theoretical biology Further reading citation doi 10.1016 j.revpalbo.2006.06.008 url http www.bio.uu.nl palaeo glossary glos int.htm title Glossary of pollen and spore terminology year 2007 author Punt, W journal Review of Palaeobotany and Palynology volume 143 issue 1 2 pages 1 last2 Hoen first2 P last3 Blackmore first3 S last4 Nilsson first4 S last5 Lethomas first5 A Category Pollination botany stub ... more details
wiktionarypar cardCard from Greek language Greek chart s , paper, papyrus primarily refers to an entire or piece of card stock . Card may refer to Small flat objects col begin col break ATM card Business card Charge card Cigarette card Debit card Computer expansion card Flashcard Gift card col break Greeting card Identity document or card Index card Intertitle or title card in films Keycard lock Library card Magnetic stripe card col break Membership card Memory card Passport card Place card Playing card Proximity card Punched card col break Rebate card Subscriber Identity Module card Smart card Stored value card Telephone card Trading card Visiting card col end As a surname Andrew Card , politician, Secretary of Transportation under George H.W. Bush and White House Chief of Staff under George W. Bush Orson Scott Card , science fiction author David Card , Canadian labour economist and professor at the University of California, Berkeley Michael Card , American Christian singer songwriter, author, and radio host In sports Card sports , the lineup of the matches in an event Arizona ... Baseball team nicknamed the Cards Other math card math , in mathematical notation, a function that returns the cardinality of a set A tool for carding Apple IIe Card , a compatibility card Cards iOS , a card making application on iOS As an acronym Community Assistance for Reconstruction, Development ... Balkans Caspase recruitment domain or CARD domain , an interaction motif found in a wide array of proteins Wolfson Centre for Age Related Diseases Credit CARD Act of 2009 Credit Card Accountability ... Deployment , FBI Team The Card The Card may refer to The Card , Arnold Bennett s 1911 novel The Card 1922 film The Card 1922 film , based on the novel The Card 1952 film The Card 1952 film , based on the novel The Card musical The Card musical , based on the novel The Card , an episode of SpongeBob SquarePants season 6 SpongeBob SquarePants season 6 See also lookfrom intitle Card game Carding disambiguation ... more details
about the novel other uses Card disambiguation Infobox Book See Wikipedia WikiProject Novels or Wikipedia WikiProject Books name The Card title orig translator image Image The Card Cover.jpg 200px image caption author Arnold Bennett illustrator cover artist country United Kingdom language English language English series subject Subject is not relevant for fiction genre Comedy Wikipedia WikiProject Novels Novel categorization publisher E. P. Dutton release date 1911 english release date media type Print Hardcover pages 305 pp isbn NA Released before ISBN system implemented preceded by Preceding novel in series followed by The Regent 1913 The Card is a short comedic novel written by Arnold Bennett in 1911, titled Denry the Audacious in the American edition . It was later made into a The Card 1952 film 1952 movie starring Alec Guinness and Petula Clark . It chronicles the rise of Edward Henry ... through luck, initiative and a fair bit of chutzpah in slang a card is a character , an original a clever, audacious, person ref Oxford English Dictionary . Card n sup 2 sup 1.2.c ref ..., thus earning himself the reputation of a card a character , someone able to set tongues wagging a reputation ... s final exchange blockquote p What a card said one, laughing joyously. He s a rare un, no mistake ... cause of cheering us all up. p blockquote Adaptations A The Card 1952 film black and white film The Card , renamed The Promoter for its United States American audience , adapted by Eric Ambler ... of Tony Hatch and Jackie Trent composed the score for a The Card musical musical stage version of the same ... links gutenberg no 12986 name The Card, a Story of Adventure in the Five Towns http librivox.org the card by arnold bennett The Card , audio book at http librivox.org Librivox http movies2.nytimes.com ...&v id New York Times review DEFAULTSORT Card, The Category 1911 novels Category Comedy novels Category Novels by Arnold Bennett Category Novels set in Staffordshire fr The Card ... more details
In telecommunication , aperture to medium coupling loss is the difference between the theoretical gain of a very large antenna electronics antenna , such as the antennas in beyond the horizon microwave links, and the gain that can be realized in practice. Note 1 Aperture antenna Aperture to Medium optics medium coupling loss is related to the ratio of the scatter angle to the antenna beamwidth . Note 2 The very large antennas are referred to in wavelengths thus, this loss can apply to line of sight systems also. Source from Federal Standard 1037C and from MIL STD 188 Category Antennas ... more details
Notability date October 2008 Unreferenced date May 2008 Synthetic aperture magnetometry SAM is a method for analysis of data obtained from magnetoencephalography MEG and electroencephalography EEG . SAM is a nonlinear beamforming approach which can be thought of as a spatial filter . Fact date October 2008 See also Aperture synthesis Category Magnetoencephalography ... more details
Refimprove date December 2009 Infobox Anatomy Name Inferior thoracic aperture Latin apertura thoracis inferior GraySubject GrayPage Image Gray113.png Caption The posterior aspect of the thorax. Inferior thoracic aperture visible at bottom. Image2 Caption2 Map MapPos MapCaption Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre a 51 DorlandsSuf 12144778 Anatomy The inferior thoracic aperture is much larger than the superior thoracic aperture . In layman s terms, it is the round opening whose edges are the lowest ribs. It is closed by the diaphragm anatomy diaphragm , which separates the thoracic cavity thoracic and abdominal cavity abdominal cavities . The inferior thoracic aperture is bounded by the thoracic vertebrae 12th thoracic vertebra posteriorly , 11th and 12th pairs of ribs laterally , costal cartilage s of ribs 7 through 10 anteriorly , and the xiphisternal joint i.e. the articulation between the xiphoid process and the inferior border of the sternal body anteriorly . Structures passing through the inferior thoracic aperture between the thorax and abdomen include the inferior vena cava and esophagus , both of which pass through the diaphragm, and the abdominal aorta and thoracic duct which pass posterior to the diaphragm through the aortic hiatus . Bones of torso References ref http en.wikipedia.org wiki Thoracic diaphragm ref ref http anatomy.med.umich.edu cardiovascular system thorax wall tables.html ref Reflist DEFAULTSORT Inferior Thoracic Aperture Category Thorax Anatomy stub ... more details
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