OSI model IPstack In computer networking , the transportlayer or layer 4 provides end to end communication services for applications ref RFC 1122, 1.1.3. The transportlayer provides end to end communication .... The transportlayer provides convenient services such as connection oriented communication connection ... networking. The definitions of the transportlayer are slightly different in these two models. This article ... programming interface to internet hosts, as opposed to the OSI Model Layer 4 TransportLayer OSI model definition of the transportlayer . The most well known transport protocol is the Transmission ... Protocol SCTP . Services There are many services that can be optionally provided by a transportlayer ... of the transportlayer in the TCP IP model , but of the session layer in the OSI model. Analysis The transportlayer is responsible for delivering data to the appropriate application process on the host ... transportlayer data packet. Together with the source and destination IP address, the port numbers constitutes .... In the OSI model, this function is supported by the session layer . Some transportlayer protocols ... data. Finally, some transportlayer protocols, for example TCP, but not UDP, provide end to end ... oriented communication is implemented at network layer or data link layer rather than the transport ... for less reliable networks. Protocols The exact definition of what qualifies as a transportlayer protocol ... of transportlayer protocols class wikitable Feature Name User Datagram Protocol UDP UDP Lite Transmission ... 8 Bytes 20 60 Bytes 12 Bytes 12 or 16 bytes Transportlayer packet entity Datagram Datagram Segment ... No Yes Yes References reflist Category Internet protocols Category Transportlayer protocols Category ... . Transport layers are contained in both the TCP IP model RFC 1122 , ref RFC 1122, Requirements ... underlying message formats. Same order delivery The network layer doesn t generally guarantee ... Reliability Packets may be lost during transport due to network congestion and errors. By means ... more details
notability date September 2011 primary sources date September 2011 Kernel Independent TransportLayer KITL is an interface in Microsoft WinCE designed to provide an easy way for you to support any debugging service ref http msdn2.microsoft.com en us library ms901824.aspx Kernel Independent TransportLayer Bot generated title ref . References reflist Category Windows CE Compu soft stub ... more details
In information technology , the Datagram TransportLayer Security DTLS protocol provides communications privacy for packet information technology datagram protocols. DTLS allows datagram based applications to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery. The DTLS protocol is based on the stream oriented TransportLayer Security TLS protocol and is intended to provide similar security guarantees. The datagram semantics of the underlying transport are preserved by the DTLS protocol the application will not suffer from the delays associated with stream protocols, but will have to deal with packet reordering, loss of datagram and data larger than a datagram packet size. DTLS is defined in RFC 4347 for use with User Datagram Protocol UDP encapsulation and in RFC 5238 for use with DCCP encapsulation. See also OpenSSL a free and popular implementation of TLS added support for DTLS with version 0.9.8. CyaSSL an open source embedded SSL TLS implementation with DTLS support. GnuTLS a free software implementation of TLS with support for DTLS since version 3.0.0. Comparison of TLS Implementations External links http www.ietf.org html.charters tls charter.html The IETF TLS Workgroup http crypto.stanford.edu nagendra papers dtls.pdf The Design and Implementation of Datagram TLS http www.eldos.com sbb desc ssl.php SSLBlackbox components for Windows and .NET software development with support for DTLS http www.cisco.com en US products ps8411 tsd products support series home.html AnyConnect popular VPN Client that uses TLS and DTLS http www.yassl.com yaSSL.com SSL TLS implementation with support for DTLS since version 1.0.3 http libsystools.sourceforge.net ... stub Category Cryptographic protocols Category Internet protocols Category Session layer protocols de Datagram TransportLayer Security es Datagram TransportLayer Security eu Datagram TransportLayer Security fr Datagram TransportLayer Security ... more details
In information technology , the TransportLayer Security TLS protocol provides connection security with mutual authentication, data confidentiality and integrity, key generation and distribution, and security parameters negotiation. However, missing from the protocol is a way to multiplex application data over a single TLS session. Multiplexed TransportLayer Security MTLS protocol is a new TLS sub protocol running over TransportLayer Security TLS or Datagram TransportLayer Security DTLS . The MTLS design provides application multiplexing over a single TLS or DTLS session. Therefore, instead of associating a TLS connection with each application, MTLS allows several applications to protect their exchanges over a single TLS session. MTLS is currently in draft stage http tools.ietf.org html draft badra hajjeh mtls 05 which expired in October 2009. See also OpenSSL a free and popular implementation. GnuTLS a free implementation whose licensing is compatible with the GNU General Public License GPL . External links http www.ietf.org dyn wg charter tls charter.html The IETF TLS Workgroup http tools.ietf.org html draft badra hajjeh mtls 05 MTLS Draft http crypto.stanford.edu nagendra papers dtls.pdf The Design and Implementation of Datagram TLS Category Cryptographic protocols Category Internet protocols crypto stub bg SSL de Datagram TransportLayer Security fi TLS fr Secure socket layer ja Secure Socket Layer pt SSL ... more details
Wireless TransportLayer Security WTLS is a security protocol, part of the Wireless Application Protocol WAP stack. It sits between the Wireless transaction protocol WTP and WAP Datagram Protocol WDP layers in the WAP communications stack. Overview WTLS is derived from TransportLayer Security TLS . WTLS uses similar semantics adapted for a low bandwidth mobile device. The main changes are Compressed data structures Where possible packet sizes are reduced by using bit fields, discarding redundancy and truncating some cryptographic elements. New certificate format WTLS defines a compressed certificate format. This broadly follows the X.509 X.509 v3 certificate structure, but uses smaller data structures. Packet based design TLS is designed for use over a data stream. WTLS adapts that design to be more appropriate on a packet based network. A significant amount of the design is based on a requirement that it be possible to use a packet network such as Short message service SMS as a data transport. WTLS has been superseded in the WAP Wireless Application Protocol 2.0 standard by the End to end TransportLayer Security Specification. Security WTLS uses modern cryptography cryptographic algorithms and in common with TLS allows negotiation of cryptographic suites between client and server. Algorithms An incomplete list Key Exchange and Signature RSA algorithm RSA Elliptic curve cryptography Elliptic Curve Cryptography ECC Symmetric Encryption Data Encryption Standard DES Triple DES RC5 Message Digest MD5 SHA1 Security criticisms Encryption Decryption at the gateway in the WAP architecture the content is typically stored on the server as uncompressed WML an XML DTD . That content is retrieved by the gateway using HTTP and compressed into WBXML , in order to perform that compression ... Category Internet standards Category Transportlayer protocols de Wireless TransportLayer Security es Wireless TransportLayer Security fr Wireless TransportLayer Security sv Wireless TransportLayer ... more details
Cleanup date October 2010 File Client ssl auth.png thumb Client Authentication SSL TransportLayer Security ... The TransportLayer Security TLS Protocol, Version 1.2 date August 2008 author T. Dierks, E. Rescorla ref TLS and SSL encrypt the segments of network connections above the TransportLayer , using Public ... , which in 1993 explored the approach of having a secure transportlayer API closely resembling Berkeley ... 2006. ref cite web author Dierks, T. and E. Rescorla title The TransportLayer Security TLS Protocol ... In applications design, TLS is usually implemented on top of any of the TransportLayer protocols, encapsulating ... Datagram TransportLayer Security DTLS . A prominent use of TLS is for securing World Wide Web ... closure of a secure session before effectively closing its transportlayer is useful to prevent or detect ... server is added. In order to provide the server name, RFC 4366 TransportLayer Security TLS Extensions ... approved version of TLS is version 1.2, which is specified in RFC 5246 The TransportLayer ... considered obsolete RFC 2246 The TLS Protocol Version 1.0 . RFC 4346 The TransportLayer Security ... and ACAP services that allow the server and client to use transportlayer security to provide private ... Cipher Suites to TransportLayer Security TLS . The 40 bit cipher suites defined in this memo appear ... 1.1 to initiate TransportLayer Security TLS over an existing TCP connection. This allows unsecured ... of a different server port . RFC 3207 SMTP Service Extension for Secure SMTP over TransportLayer Security ... symmetric ciphers. RFC 3546 TransportLayer Security TLS Extensions , adds a mechanism for negotiating ... by RFC 4366. RFC 3749 TransportLayer Security Protocol Compression Methods , specifies the framework for compression methods and the DEFLATE compression method. RFC 3943 TransportLayer Security TLS ... Suites to TransportLayer Security TLS . RFC 4162 Addition of SEED Cipher Suites to TransportLayer ... based on pre shared keys. Extensions to TLS 1.1 include RFC 4347 Datagram TransportLayer ... more details
In computer networking , the TransportLayer Interface TLI was the networking Application Programming Interface API provided by AT&T UNIX System V Release 3 SVR3 in 1987 ref harv Goodheart 1994 p 11 ref and continued into Release 4 SVR4 . ref name Goodheart harv Goodheart 1994 p 17 ref TLI was the System V counterpart to the Berkeley Software Distribution BSD Berkeley sockets sockets programming interface, which was also provided in UNIX System V Release 4 SVR4 . ref name Goodheart TLI was later standardized as XTI , the X Open Transport Interface . TLI and Sockets It was originally expected that the Open Systems Interconnection OSI protocols would supersede TCP IP, thus TLI is designed from an OSI model OSI model oriented viewpoint, corresponding to the OSI transportlayer . Otherwise, TLI looks similar, API wise, to sockets. TLI and XTI were widely used and, up to UNIX 98, were preferred over the POSIX Sockets API. ref name Xns harv XNS 5.2 ref TLI and XTI are still supported in SVR4 derived operating systems and operating systems conforming to branded UNIX UNIX 95, UNIX 98 and UNIX 03 Single UNIX Specifications such as Solaris operating system Solaris as well as classic Mac OS , in the form of Open Transport . Under UNIX 95 XPG4 and UNIX 98 XPG5.2 , XTI was the preferred and recommended supported API for new transport protocols. ref harv XNS 5 ref ref name Xns As a result of deliberations by the Austin Group with the goal of bringing flavors of UNIX that do not provide STREAMS , such as BSD and Linux , under the Single UNIX Specification, the UNIX 03 Single UNIX Specification both declares STREAMS as optional, and declares POSIX Sockets as the preferred API for new transport protocols. See also X Open Transport Interface , formally standardized successor to TLI. X Open Portability Guide , the predecessor to POSIX Computer networking , outlining the major networking ... programming interfaces de TransportLayer Interface ja TransportLayer Interface ru ... more details
Layer may refer to wiktionary A layer of archaeological deposits in an Excavation archaeology excavation A layer hen , a hen raised to produce eggs Stratum , a layer of rock or soil with internally consistent characteristics Thermocline , a layer within a body of water where the temperature changes rapidly with depth Layering , a technique for plant propagation Layered hair , a popular hair styling technique Layering clothing , the wearing of multiple layers of clothing for practical or fashion purposes Layering may also refer to the money laundering crimes, that usually occur in 3 stages placement when the dirty money is separated from the former criminal activity , layering the act of giving an appearance of legal to the values and integration when the money is formally incorporated to the economic system . Places Layer de la Haye is a village in Essex, England. In fiction Mega Man X8 Maverick Hunters Layer , a female Maverick Hunter in the Mega Man X series In science Layer electronics , a single thickness of some material covering a surface F region Appleton Layer , or F Layer telecommunications In computing and technology Abstraction layer OSI model layers Internet protocol suite layers 2D computer graphics Layers , layers in 2D computer graphics Layers digital image editing map layer a set of graphical information, especially in geographic information system s layer object oriented design DVD layer, such as in DVD Dual layer recording Layer HTML tag a deprecated < iframe> like tag, unique to Netscape 4 browsers A layer of objects in CAD standards CAD disambiguation de Layer es Capa desambiguaci n eo Tavolo fr Couche ko he ja ru sk Vrstva uk ... more details
An S layer surface layer is a part of the cell envelope commonly found in bacteria , as well as among archaea . ref http www.sciencedirect.com science? ob ArticleURL& udi B6T9N 44M1F9J 4& user 10& origUdi B7CTD 4SH7GMN 7& fmt high& coverDate 01 2F31 2F2002& rdoc 1& orig article& acct C000050221& version 1& urlVersion 0& userid 10&md5 cddfffd5c87e8cc6c0c119e71873cd77 S layers on cell walls of cyanobacteria Micron Volume 33, Issue 3, January 2002, Pages 257 277 doi 10.1016 S0968 4328 01 00031 2 ref It consists of a monomolecular layer composed of identical proteins or glycoproteins . This two dimensional structure is built via self assembly and encloses the whole cell surface. Thus, the S layer protein can represent up to 10 15 of the whole protein content of a cell ref name ref1 cite journal author Messner P, Sleytr U title Crystalline bacterial cell surface layers journal Adv. Microb. Physiol ... name ref2 cite journal author Pum D, Messner P, Sleytr U title Role of the S layer in morphogenesis ... S layer proteins are poorly conserved or not conserved at all, and can differ markedly even between ..., the S layer is composed of one P1 , two P2 , three P3 , four P4 , or six P6 identical protein ... contain surface layer homology SLH domains, the binding occurs to the peptidoglycan and to a secondary ... electrostatic interactions between the positively charged N terminus of the S layer protein and a negatively charged secondary cell wall polymer. In Gram negative archaea , S layer proteins possess a hydrophobic ... , the S layer proteins bind to pseudomurein or to methanochondroitin. Biological functions of the S layer For many bacteria, the S layer represents the outermost interaction zone with their respective environment. Its functions are very diverse and vary from species to species. In Archaea the S layer ... and the cytoplasmic membranes References reflist DEFAULTSORT S Layer Category Cell anatomy Category Membrane biology cs S vrstva de S Layer es Capa S fr Couche S it S Layer ja S tr ... more details
. ref . The lower layers may also be named control layer and transportlayer the transportlayer is also referred to as the access layer in some architectures . Citation needed date February 2009 The concept of service layer is used in contexts such as Intelligent network s IN , Wireless Application ... date April 2009 In intelligent network s IN and cellular networks, service layer is a conceptual layer within a network service provider architecture. It aims at providing middleware that serves third party value added service s and applications at a higher application layer . The service layer ... open and secure Application Programming Interface s APIs by application layer servers owned by third party content provider s. The service layer also provides an interface to core networks at a lower resource layer ref http books.google.com books?id j2 6yEHS0jwC&pg PA16&dq 22service layer 22 telecommunications&lr ..., for example Service oriented architecture , the concept of service layer has a different meaning. Service layer in IMS The service layer of an IP Multimedia Subsystem IMS architecture provides multimedia services to the overall IMS network. This layer contains network elements which connect to the Serving ... Initiation Protocol SIP signalling protocol. Elements of the IMS service layer The network elements contained with in the service layer are generically referred to as service platforms however the 3GPP ... such as INAP and Customised Applications for Mobile networks Enhanced Logic CAMEL . Service layer in SOA In Service oriented architecture SOA , the service layer is the third layer in a five abstraction layer model. The model consists of Object layer, Component layer, Service layer, process layer and Enterprise layer. ref http books.google.com books?id NISyExeJ5mAC&pg PA88&dq 22service layer 22 .... Published by FT Press, 2005. ISBN 0131870025, 9780131870024 ref . The service layer can be considered ... Category Application layer protocols Category Service oriented business computing Category Middleware ... more details
OSIModel The presentation layer is layer 6 of the seven layer OSI model of computer network ing and serves ... us library cc959885.aspx Microsoft TechNet ref It is sometimes called the syntax layer. ref cite book ... encyclopedia v onepage&q&f false ref Description The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display. ref ... layer of concern regarding syntactical differences in data representation within the end User computing ... text computer file to an ASCII coded file. The presentation layer is the lowest layer at which application ... of Network packet datagrams or packets between hosts. This layer deals with issues of string representation ..., e.g. code thisisastring 0 code . The idea is that the application layer should be able to point at the data to be moved, and the presentation layer will deal with the rest. what is this rest? Serialization ... TLV or XML can be thought of as the key functionality of the presentation layer. Encryption is typically done at this level too, although it can be done on the application layer application , session layer session , iransport layertransport , or network layer s, each having its own advantages and disadvantages. ref name Network Guide to Networks Decryption is also handled at the presentation layer. For example, when logging off bank account sites the presentation layer will decrypt the data as it is received ... strings, more complicated things are standardized in this layer. Two common examples are objects in object .... For example, HyperText Transfer Protocol HTTP , generally regarded as an application layer protocol, has presentation layer aspects such as the ability to identify character encoding for proper conversion, which is then done in the application layer. Within the service layering semantics of the OSI network architecture, the presentation layer responds to service requests from the application layer and issues service requests to the session layer. Services Data conversion ref name Microsoft ... more details
Protocol RTP, Real time Transport Protocol RTPS protocol RTPS , Real Time Publish Subscribe RTSP, RTSP ... External links Commons category application layer protocols http learn networking.com tcp ip how the application layer works How The Application Layer Works refers to the Internet Protocol Suite Category OSI protocols Category Application layer protocols bg ca Capa d aplicaci cs Aplika n ... sv Applikationsskikt tl Patong na aplikasyon te th application layer tr Uygulama tabakas ... more details
the packet to this host by passing it to the appropriate link layer implementation for incoming packets, capture packets and pass the packet payload up to the appropriate transportlayer protocol ... Control Protocol TCP in the transportlayer . Integrity of packets is guaranteed only ...The internet layer or IP layer is a group of internetworking methods in the Internet protocol suite , commonly also called TCP IP, which is the foundation of the Internet . It is the group of methods, protocols, and specifications that are used to transport datagrams packets from the originating host across network boundaries, if necessary, to the destination host specified by a network address IP address which is defined for this purpose by the Internet Protocol IP . The internet layer derives its ... gateways . Internet layer protocols use IP based packets. The internet layer does not include the protocols ... belong to the link layer . A particularly crucial aspect in the internet layer is the robustness principle ... host can deny Internet service to many other users. IPstack Purpose The internet layer has three basic ... layer is not responsible for reliable transmission. It provides only an unreliable service, and best ... in the internet layer are the Internet protocol IP . It is implemented in two versions, IPv4 and IPv6 ... model The internet layer of the TCP IP model is often compared directly with the network layerlayer ... in these layers are different between the models. OSI s network layer is a catch all layer for all protocols that facilitate network functionality. The internet layer, on the other hand, is specifically ... network layer is often Where date July 2011 described to include protocols such as the Address Resolution Protocol ARP which was placed in link layer by the original TCP IP architects RFC ... standards documents the internet layer is still sometimes improperly called network layer ... Internet Layer protocols Category Network layer protocols he TCP IP fa ... more details
for the anatomy anatomical structure Boundary layer of uterus Image Boundarylayer.png 320px thumb right Boundary layer visualization, showing transition from laminar to turbulent condition In physics and fluid mechanics , a boundary layer is that layer of fluid in the immediate vicinity of a bounding ... , the planetary boundary layer is the air layer near the ground affected by diurnal heat, moisture or momentum transfer to or from the surface. On an aircraft wing the boundary layer is the part of the flow close to the wing. The boundary layer effect occurs at the field region in which all changes occur in the flow pattern . The boundary layer distorts surrounding non viscous flow. It is a phenomenon ... under which they are created. The thin shear layer which develops on an oscillating body is an example of a Stokes boundary layer , while the Blasius boundary layer refers to the well known Similitude model similarity solution for the steady boundary layer attached to a flat plate held in an oncoming ... effect , rather than convective inertia, leading to the formation of an Ekman layer . Thermal boundary ... simultaneously. Aerodynamics File Laminar boundary layer scheme.svg thumb 320px Laminar boundary layer velocity profile The Aerodynamics aerodynamic boundary layer was first defined by Ludwig Prandtl ... the flow field into two areas one inside the boundary layer, where viscosity is dominant and the majority ... the boundary layer where viscosity can be neglected without significant effects on the solution. This allows ... a body also takes place within the boundary layer, again allowing the equations to be simplified in the flow field outside the boundary layer. The thickness of the velocity boundary layer is normally .... An alternative definition, the displacement thickness, recognises the fact that the boundary layer ... will then increase rapidly within the boundary layer, governed by the boundary layer equations, below. The thermal boundary layer thickness is similarly the distance from the body at which the temperature ... more details
, sediments et cetera transport ed to or from the interface. The term boundary layer is used in meteorology and in oceanography physical oceanography . The atmospheric surface layer is the lowest part of the atmospheric boundary layer typically the bottom 10 where the log wind profile is valid . The ocean ...Image Surface layer.jpg thumb 400px The surface layer is the layer in a fluid where the scale of turbulent ... to the surface. The surface layer is the layer of a turbulent fluid most affected by interaction with a solid ... ocean marine surface layer, at the air sea Interface chemistry interface . Mathematical Formulation A simple Mathematical model model of the surface layer can be derived by first examining the turbulent ..., MA pages 129 130 chapter Chapter 5 The Planetary Boundary Layer ref Using Reynolds Decomposition ... turbulent transport of horizontal turbulent momentum, math u w math math u 2 left overline ... frac u k ln frac z z o math . So we see that the mean flow in the surface layer has a logarithm ic relationship with depth. The Surface layer in oceanography The surface layer is studied in oceanography ... of a surface layer. Discrepancies with traditional theory The logarithmic flow profile has long ... layer in which turbulent eddies are enhanced by the action of surface waves. ref name craig ... Michael L. Banner title Modeling Wave Enhanced Turbulence in the Ocean Surface Layer journal Journal ... 1994JPO....24.2546C ref It is becoming clear that the surface layer of the ocean is only poorly ... of turbulent kinetic energy within the surface layer. ref name Agrawal Diurnal cycle After nighttime convection over the ocean, the turbulent surface layer is found to completely decay and restratify ... and restratification in the Equatorial Ocean surface layer following nighttime convection journal ... bibcode 1997JPO....27.1120C ref See also mixed layer density salinity References this empty section displays references defined elsewhere reflist DEFAULTSORT Surface Layer Category Boundary layer meteorology ... more details
Image Ekman layer.jpg thumb 350px The Ekman layer is the layer in a fluid where the flow is the result ... of water. The Ekman layer is the layer in a fluid where there is a force balance between pressure ... Walfrid Ekman . History Ekman developed the theory of the Ekman layer after Fridtjof Nansen observed ... Layer isbn 0133533018 ref Mathematical formulation The mathematical formulation of the Ekman layer ... mixing length theory . Boundary conditions There are many regions where an Ekman layer is theoretically ... boundary conditions of the Ekman layer in the upper ocean ref name Vallis cite book last Vallis ... layer at the top of the ocean and math u g math and math v g math are the geostrophic flows in the math ... x partial y right 1 e z d cos z d right . math Note that when vertically integrated the volume transport .... Experimental observations of the Ekman layer There is much difficulty associated with observing the Ekman layer for two main reasons the theory is too simplistic as it assumes a constant eddy viscosity ... shear in the surface layer . Splitting the boundary layer into the surface layer and the Ekman layer generally yields more accurate results. ref name Holton cite book last Holton first James ... Burlington, MA pages 129 130 chapter Chapter 5 The Planetary Boundary Layer isbn 0123540151 ref In the ocean The Ekman layer, with its distinguishing feature the Ekman spiral, is rarely observed in the ocean. The Ekman layer near the surface of the ocean extends only about 10 20 meters deep, ref ... doi 10.1016 0198 0149 92 90091 7 ref Instrumentation Observations of the Ekman layer have only been ... observation of the Ekman spiral came in 1980 during the Mixed Layer Experiment . ref name Davis ... Modelling the mixed layer response journal Deep Sea Res. volume 28 pages 1453 1475 year 1981 accessdate 12 08 2008 doi 10.1016 0198 0149 81 90092 3 ref See also Ekman spiral Ekman transport Tea leaf paradox References reflist physical oceanography Category Boundary layer meteorology Category Oceanography ... more details
Inversion layer may refer to one of the following Inversion meteorology , a layer within which an atmospheric property is inverted, i.e., its change is deviated from the normal pattern Inversion layer semiconductors , a layer in a semiconductor material where the type of the majority carriers changes to its opposite under certain conditions disambig ... more details
The term granular layer may refer to the granular layer of Tomes, seen in dentin of the teeth. When dry section of the root dentin of teeth are visualized under transmitted light, a granular layer is seen adjacent to cementum.It is believed to be caused by coalescing & looping of terminal portion of dentinal tubules. The Granular layer cerebellum of the cortex of the human cerebellum The Granular layer cerebral cortex of the cerebral cortex The Granular layer of skin disambig ... more details
Double layer may refer to Double layer plasma , a structure in a plasma and consists of two parallel layers with opposite electrical charge Double layer interfacial , a structure that appears on the surface of an object when it is placed into a liquid Double layer biospecific , the surface where two different phases of matter are in contact DVD R DL or Double layer, a DVD format disambig ... more details
Unreferenced date December 2009 Infobox Anatomy Name Sattler& 39 s layer Latin lamina vasculosa GraySubject GrayPage Image Caption Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre l 05 DorlandsSuf 12481039 Sattler s layer is layer of medium diameter blood vessel s of the choroid , a layer of the eye . Eye anatomy DEFAULTSORT Sattler s Layer Category Eye anatomy Circulatory stub Eye stub ... more details
The ozone layer is a layer in Earth s atmosphere which contains relatively high concentrations of ozone O sub 3 sub . This layer absorbs 97 99 of the Sun s high frequency ultraviolet light , which is potentially ... Education Ozone ozonelayer.html title Ozone layer accessdate 2007 09 23 ref It is mainly located ... basics.htm title Science Ozone Basics. accessdate 2007 01 29 ref The ozone layer was discovered ... thumb 350px Ozone oxygen cycle in the ozone layer. The photochemical mechanisms that give rise to the ozone layer were discovered by the British physicist Sydney Chapman mathematician Sidney Chapman ... called the ozone oxygen cycle , thus creating an ozone layer in the stratosphere , the region from ... level with 10 decrease in ozone Although the concentration of the ozone in the ozone layer is very ... . The ozone layer is very effective at screening out UV B for radiation with a wavelength of 290 ... in the stratosphere The thickness of the ozone layer that is, the total amount of ozone in a column ... in the northern hemisphere. During winter, the ozone layer actually increases in depth. This puzzle .... Image Nimbus ozone Brewer Dobson circulation.jpg thumb Brewer Dobson circulation in the ozone layer. The ozone layer is higher in altitude in the tropics, and lower in altitude in the extratropics ... the course of the winter. Again, wind transport of ozone is principally responsible for the seasonal ... Future ozone layer concentrations.gif thumb 400px NASA projections of stratospheric ozone concentrations if chlorofluorocarbons had not been banned. The ozone layer can be depleted by free radical ... spray s that are thought to damage the ozone layer. The European Community rejected an analogous proposal ... title Brief Questions and Answers on Ozone Depletion & 124 Ozone Layer Protection & 124 US EPA ... that the depletion of the ozone layer may be slowing down due to the international ban on CFCs. ref cite news url http www.ecozine.co.uk OzoneLayer.htm title Ozone Layer. accessdate 2010 11 09 author ... more details
Layer Breton is a village and a civil parish in the Colchester borough Colchester borough , in the county of Essex , England . Layer Breton has a church called St Mary the Virgin, Layer Breton. ref http www.achurchnearyou.com layer breton st mary the virgin ref The village was among those which suffered damage from the 1884 Colchester earthquake . References Reflist External links http www.british history.ac.uk report.aspx?compid 51098 http www.britishlistedbuildings.co.uk england essex layer breton coord 51.830 0.821 type city region GB display title Category Villages in Essex Category Colchester Category Civil parishes in Essex Essex geo stub pl Layer Breton ... more details
Unreferenced date December 2009 A slime layer in bacteria is an easily removed, diffuse, unorganized layer of extracellular material that surrounds bacteria cells. Specifically, this consists mostly of exopolysaccharide s, glycoprotein s, and glycolipid s. The slime layer is not to be confused with the S layer , a separate and highly organised glycoprotein layer surrounding many bacterial cells. The function of the slime layer is to protect the bacteria cells from environmental dangers such as antibiotic s and desiccation . The slime layer also allows bacteria to adhere to smooth surfaces such as prosthetic medical devices and catheter s. It may permit bacterial colonies to survive chemical sterilization microbiology sterilization with chlorine , iodine , and other chemicals, leaving autoclaving or flushing with boiling water as the only certain methods of decontamination . A bacterial capsule microbiology capsule is similar, but is a well ordered structure that is resistant to washing off. Bacteria DEFAULTSORT Slime Layer Category Bacteriology Category Microbiology cs Slizov vrstva ... more details
Layer 8 is humorous Internet jargon used to refer to a nonexistent user or political layer on top of the OSI model of computer networking. ref Citation last Gregg first Michael title OSI Securing the Stack, Layer 8 Social engineering and security policy journal TechTarget date 2007 05 01 year 2007 url http searchnetworking.techtarget.com tip 0,289483,sid7 gci1253302,00.html . ref ref http www.ncsu.edu it cmptplans layer8 NCSU Layer 8 Initiative ref The OSI model is a 7 layer abstract model that describes ... other, allowing for abstraction of specific functions in each one. The top 7th layer is the Application Layer describing methods and protocols of software applications. It is then held that the user is the 8th layer. Since the OSI layer numbers are commonly used to discuss networking topics, a troubleshooter may describe an issue caused by a user to be a layer 8 issue, similar to the PEBKAC acronym ... article on the eighth layer ref Political economic theory ref Citation last Mosco first Vincent title ... 1996 isbn 0803985606 . ref holds that the 8th layer is important to understanding the OSI Model. Political ... the technologies comprising layers 1 7 of the OSI Model. An 8th layer has also been referenced to physical ... network. An example of this is ALI in Profibus . A network guru t shirt from the 1980s shows Layer 8 as the financial layer, and Layer 9 as the political layer. ref https www.isc.org store logoware clothing isc 9 layer osi model cotton t shirt ISC 9 layer t shirt ref Similar pseudo layers in the TCP IP model In the TCP IP model , the 4 layer model of the Internet , the 5th layer is analogously sometimes described as the political layer and the 6th as the religious layer . This appears in Request ... RFC published in 1998. Other uses Linux Gazette carries a regular column called Layer 8 Linux Security ref http www.linuxgazette.net 164 kachold.html Layer 8 Linux Security ref . See also Real life Related terminology Meatspace References references Category Network architecture it Layer 8 ... more details
File St Mary the Virgin Church, Layer Marney geograph.org.uk 1142974.jpg thumb 220px St Mary the Virgin Church Layer Marney is a village and civil parish near to Tiptree , in the Colchester borough Colchester borough , in the county of Essex , England. Layer Marney has a Tudor palace called Layer Marney Tower ref http www.britishlistedbuildings.co.uk en 419935 layer marney tower layer marney ref and a church called Church of St Mary the Virgin. ref http www.britishlistedbuildings.co.uk en 419934 church of st mary the virgin layer marne ref In 2001 the population of the civil parish of Layer Marney was 206. ref http www.neighbourhood.statistics.gov.uk dissemination LeadTableView.do?a 3&b 794541&c Layer Marney&d 16&e 15&g 444964&i 1001x1003x1004&m 0&r 1&s 1308749697712&enc 1&dsFamilyId 779 ref References Reflist External links http www.britishlistedbuildings.co.uk england essex layer marney coord 51 49 N 0 48 E display title region GB type city source GNS enwiki Category Villages in Essex Essex geo stub pl Layer Marney ... more details
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