website Linux Game Publishing Category Networklayer protocols ... Keeps all clients aware of all other clients Network messaging by either a push or a pull ... saving Server security server can disconnect any client Network load reacting data transmission and retransmission Background pinging to monitor network states A fully functional lobby system Server failover Network address translation NAT traversal using STUN Games using Grapple Ballistics computer ... more details
More footnotes date December 2008 The Network Abstraction Layer NAL is a part of the H.264 AVC Video Coding Standard. The main goal of the H.264 AVC NAL is the provision of a network friendly video representation addressing conversational video telephony and non conversational storage, broadcast, or streaming applications. NAL has achieved a significant improvement in rate distortion efficiency relative to existing standards. Introduction An increasing number of services and growing popularity of high definition TV are creating greater needs for higher coding efficiency. Moreover, other transmission media such as Cable Modem , xDSL , or UMTS offer much lower data rates than broadcast channels, and enhanced coding efficiency can enable the transmission of more video channels or higher quality video representations within existing digital transmission capacities. Video coding for telecommunication applications has diversified from ISDN and T carrier T1 E carrier level 1 E1 service to embrace PSTN , mobile wireless networks, and LAN Internet network delivery. Throughout this evolution, continued efforts have been made to maximize coding efficiency while dealing with the diversification of network types and their characteristic formatting and loss error robustness requirements. The H.264 AVC standard is designed for technical solutions including areas like broadcasting over cable , satellite , cable modem , DSL , Terrestrial radio terrestrial , etc. interactive or serial storage on optical and magnetic devices, conversational services, video on demand or multimedia streaming, multimedia messaging services, etc. Moreover, new applications may be deployed over existing and future networks. This raises the question about how to handle this variety of applications and networks. To address ... the Video Coding Layer VCL representation of the video and provides header information in a manner ... in order to provide network friendliness to enable simple and effective customization of the use of VCL ... more details
Layer may refer to wiktionary layer layers 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 tocright Places Layer de la Haye is a village in Essex, England Fiction Mega Man X8 Maverick Hunters Layer , a female Maverick Hunter in the Mega Man X series Science Layer electronics , a single thickness of some material covering a surface F region Appleton Layer , or F Layer telecommunications Computing and technology Abstraction layer , a way of hiding the implementation details of a particular set of functionality OSI model layers Internet protocol suite layers 2D computer graphics Layers , layers in 2D computer graphics Layers digital image editing , used in digital image editing to separate different elements of an image map layer a set of graphical information, especially in geographic information system s layer object oriented design , a group of classes that have the same set of link time module dependencies to other modules 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
Cleanup date January 2008 Refimprove date November 2008 Layer by Layer LbL deposition is a thin film fabrication technique. The films are formed by depositing alternating layers of oppositely charged materials with wash steps in between. A simple representation can be made by defining two oppositely charged polyions as and , and defining the wash step as W. To make an LbL film with 5 bilayers one would deposit W W W W W W W W W W W, which would lead to a film with 5 bilayers, specifically . The bilayers and wash steps can be performed in many different ways including dip coating , spin coating , spray coating and flow based techniques. Characterisation of LbL film deposition is typically done by optical techniques such as dual polarisation interferometry or ellipsometry or mechanical techniques such as QCM or QCMD. LbL offers several advantages over other thin film deposition methods. LbL is extremely simple and cheap. There are a wide variety of materials that can be deposited by LbL including polyions, metals, ceramics, nanoparticles, and biological molecules. Another important quality of LbL is the high degree of control over thickness, which arises due to the linear growth of the films with the number of bilayers. By the fact that each bilayer can be as thin as 1 nm, this method offers easy control over the thickness with 1 nm resolution. LbL has found applications in corrosion control, biomedical applications, and many more. Citation needed date January 2009 See also Atomic layer deposition External links http www.azonano.com news.asp?newsID 2524 Literatur Autor G. Decher Titel Fuzzy Nanoassemblies Toward Layered Polymeric Multicomposites Sammelwerk Science Band 277 Nummer 29 Jahr 1997 Seiten 1232 1237 DOI 10.1126 science.277.5330.1232 Category Thin films de Layer by layer ... more details
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 provides capability servers owned by a telecommunication network service provider, accessed through 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 .... ref The lower layers may also be named control layer and transport layer the transport layer 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 Protocol ... 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 ... Protocol SIP signalling protocol. Elements of the IMS service layer The network elements contained within the service layer are generically referred to as service platforms however the 3GPP ... the same function as a Telephony Application Server in a pre IMS network, however it is specifically tailored to support the SIP signalling protocol for use in an IMS network. OSA Service Capability Server An OSA Service Capability Server acts as a secure gateway between the IMS network and an application ... between the IMS network and application servers using other telecommunication signalling standards such as INAP and Customised Applications for Mobile networks Enhanced Logic CAMEL . Service layer in SOA ... more details
Layer 8 is humorous Internet jargon used to refer to a nonexistent user or political layer on top of the OSI ..., Layer 8 Social engineering and security policy journal TechTarget date 2007 05 01 year 2007 url ... 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. According to Bruce Schneier and RSA Layer 8 The individual person. Layer 9 The organisation. Layer 10 Government or legal compliance http blogs.rsa.com curry engineering security solutions at layer 8 and above 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 ... 180 News article on the eighth layer ref Political economic theory ref Citation last Mosco first Vincent ..., Inc year 1996 isbn 0803985606 . ref holds that the 8th layer is important to understanding the OSI Model. Political policies such as network neutrality , spectrum management , and digital inclusion all shape the technologies comprising layers 1 7 of the OSI Model. An 8th layer has also been referenced ... model 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 ... Fools Day 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 ... more details
network 2B guide to networks&src bmrr v onepage&q&f false ref The implementation of this layer is often termed PHY . The physical layer consists of the basic networking hardware transmission technologies of a Computer networknetwork . ref name Fundamentals of Sensor Network Programming cite book last Iyengar first Shisharama title Fundamentals of Sensor Network Programming publisher Wiley year 2010 location pages 136 url http books.google.com books?id UD0h GqgbHgC&printsec frontcover&dq network 2B guide to networks&src bmrr v onepage&q&f false ref It is a fundamental layer underlying the logical data structures of the higher level functions in a network. Due to the plethora of available hardware technologies with widely varying characteristics, this is perhaps the most complex layer in the OSI architecture. The physical layer defines the means of transmitting raw bits rather than logical Network packet data packets over a physical data link link connecting network node s. The bit ... of protocols Telephone network modems V.92 Infrared Data Association IRDA physical layer USB physical ... Video Bus G.hn G.9960 physical layer CAN bus controller area network physical layer Hardware equipment ...refimprove date October 2009 OSIModel The physical layer or layer 1 is the first and lowest layer in the seven layer OSI model of computer network ing. ref name Data and Computer Network Communications cite book last Banzal first Shashi title Data and Computer Network Communication publisher Firewall ... that is transmitted over a hardware transmission medium . The physical layer provides an electrical ... and similar low level parameters, are specified here. Within the semantics of the OSI network architecture, the physical layer translates logical communications requests from the data link layer into hardware ... sublayer In a local area network LAN or a metropolitan area network MAN using open systems interconnection OSI architecture, the physical signaling sublayer is the portion of the physical layer ... more details
In computer network ing, the link layer is the lowest layer in the Internet Protocol Suite commonly known ..., 1982 , aspects of the link layer are referred to by several poorly defined terms, such as network access layer , network access protocol , as well as networklayer , while the next higher layer is called internetwork layer . In some modern text books, network interface layer , host to networklayer and network access layer occur as synonyms either to the link layer or the data link layer, often ... to fit between OSI s data link layer and the networklayer. In general, direct or strict comparisons ... is considered to be harmful RFC 3439 . Another term sometimes encountered, network access layer , tries to suggest the closeness of this layer to the physical network. However, this use is misleading and non standard, since the link layer implies functions that are wider in scope than just network access . Important link layer protocols are used to probe the topology of the local network, discover ... model of networking that relate to the link layerNetworklayer References Reflist External links ... and logical network component used to interconnect Host network hosts or Node networking nodes in the network and a link protocol is a suite of methods and standards that operate only between adjacent network nodes of a Local area networkNetwork segment segment or a wide area network connection. Despite the different semantics of layering in TCP IP and OSI, the link layer is often described as a combination of the data link layerlayer 2 and the physical layerlayer 1 in the Open Systems ... scopes application, host to host, network, link and not detailed prescriptions of operating procedures, data semantics, or networking technologies. RFC 1122 exemplifies that local area network protocols ... to the link layer. IPstack Definition in standards and text books LAN standards such as Ethernet and IEEE 802 specifications use terminology from the seven layer OSI model rather than the TCP IP ... more details
OSIModel The presentation layer is layer 6 of the seven layer OSI model of computer network ing and serves as the data translator for the computer networknetwork . ref name Network Guide to Networks cite book last Dean first Tamara title Network Guide to Networks publisher Delmar year 2010 location pages 44 47 url http books.google.com books?id UD0h GqgbHgC&printsec frontcover&dq network 2B guide ... of Network packet datagrams or packets between hosts. This layer deals with issues of string representation ... network architecture, the presentation layer responds to service requests from the application ... 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 ..., 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 , transport layer transport , or networklayer 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. ref name Network Guide to Networks Another example is representing structure, which ... strings, more complicated things are standardized in this layer. Two common examples are objects in object ... more details
model The internet layer of the TCP IP model is often compared directly with the networklayerlayer ... in these layers are different between the models. OSI s networklayer is a catch all layer for all protocols that facilitate network functionality. The internet layer, on the other hand, is specifically ... networklayer is often Where date July 2011 described to include protocols such as the Address ... standards documents the internet layer is still sometimes improperly called networklayer ... Internet layer protocols Category Networklayer protocols he TCP IP fa ...The internet layer or IP layer is a group of internetworking methods in the Internet protocol suite , commonly ... 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 that define communication between local on link network nodes which fulfill the purpose of maintaining link states between the local nodes, such as the local network topology, and that usually ... 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 ... 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 transport layer protocol ... layer is not responsible for reliable transmission. It provides only an unreliable service, and best effort delivery. This means that the network makes no guarantees about packets proper arrival see ... points of a communication path, i.e., the hosts, rather than on the network. This is one of the reasons ... Control Protocol TCP in the transport layer . Integrity of packets is guaranteed only ... more details
The Internet protocol suite TCP IP and the Open Systems Interconnection model OSI model of computer network ing each specify a group of protocols and methods identified by the name application layer . In TCP IP, the application layer contains all protocols and methods that fall into the realm of process to process communications across an Internet Protocol IP network. Application layer methods use the underlying transport layer protocols to establish host to host connections. In the OSI model, the definition of its application layer is narrower in scope, explicitly distinguishing additional functionality above the transport layer at two additional levels, the session layer and the presentation layer . OSI specifies strict modular separation of functionality at these layers and provides OSI protocols protocol implementations for each layer. IP stack OSI model TCP IP protocols The following protocols are explicitly mentioned in RFC 1123 1989 , describing the application layer of the Internet ... url http tools.ietf.org html rfc1123 publisher Network Working Group of the IETF editor Robert Braden ... System DNS Reverse Address Resolution Protocol RARP Bootstrap Protocol BOOTP Simple Network Management ... eDonkey network eDonkey ENRP, Endpoint Handlespace Redundancy Protocol FastTrack protocol FastTrack ... Mail Extensions and Secure MIME Modbus Netconf NFS, Network File System protocol Network File System NIS, Network Information Service NNTP, Network News Transfer Protocol NTCIP, National Transportation Communications for Intelligent Transportation System Protocol NTP, Network Time Protocol OSCAR protocol ... Network Time Protocol SOCKS, the SOCKS internet protocol SSH, Secure Shell SSMS, Secure SMS Messaging ... Messaging and Presence Protocol References Reflist 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 ... more details
will re release Angelic Layer in omnibus format in 2011. ref citeweb url http www.animenewsnetwork.com news 2011 03 07 dark horse adds angelic layer tokyo babylon omnibuses title Dark Horse Adds Angelic Layer, Tokyo Babylon Omnibuses publisher Anime News Network date 2011 03 07 ref Angelic Layer ...Infobox animanga Header name image File Angelic Layer Volume 1.jpg 230px caption The cover of the first volume of Angelic Layer released in English by Tokyopop on June 25, 2002 featuring Misaki ... list Infobox animanga Video type tv series title Battle Dolls Angelic Layer director Hiroshi Nishikiori ... United States A.D. Vision network TV Tokyo network en flagicon Canada flagicon United States Anime Network br flagicon South Africa Animax first April 1, 2001 last September 23, 2001 episodes 26 episode list List of Angelic Layer episodes Infobox animanga Footer Nihongo Angelic Layer ... series produced by Bones studio Bones titled nihongo Battle Doll Angelic Layer Kid Tenshi Enjerikku Reiy lit. Mobile Angel Angelic Layer which aired on TV Tokyo from April 1, 2001 ... Detail.asp?ID 4260 title Angelic Layer Complete Collection accessdate 2 January 2009 work ADV Films.com ... Blanche. Plot see also List of Angelic Layer characters The primary protagonist of Angelic Layer is List of Angelic Layer characters Misaki Suzuhara Misaki Suzuhara , a seventh grader who just moved ... about Angelic Layer, a highly popular game in which players called Deus buy and custom design dolls ... the layer. Layers are very expensive most users rent them by the hour in establishments resembling cybercafe ... from Clamp s Magic Knight Rayearth a Story within a story manga in Angelic Layer s world , which she ... and watched carefully by Icchan. Later, Icchan s identity is revealed as List of Angelic Layer characters Ichiro Icchan Mihara Ichiro Mihara , the co creator of Angelic Layer. Misaki also begins studying ... high school. There she becomes friends with List of characters in Angelic Layer Main characters Hatoko ... more details
underlying message formats. Same order delivery The networklayer doesn t generally guarantee ... oriented communication is implemented at networklayer or data link layer rather than the transport layer. In X.25, in telephone network modems and in wireless communication systems, reliable ...OSI model IPstack In computer networking , the transport layer or layer 4 provides end to end communication services for applications ref RFC 1122, 1.1.3. The transport layer provides end to end communication services for applications. ref within a layered architecture of network components and protocols. The transport layer provides convenient services such as connection oriented communication connection ... networking. The definitions of the transport layer are slightly different in these two models. This article ... programming interface to internet hosts, as opposed to the OSI Model Layer 4 transport layer OSI model definition of the transport layer . The most well known transport protocol is the Transmission ... Protocol SCTP . Services There are many services that can be optionally provided by a transport layer ... Reliability Packets may be lost during transport due to network congestion and errors. By means ... network, so as to avoid congestive collapse by attempting to avoid oversubscription ... packets . For example, automatic repeat request s may keep the network in a congested state this situation ... on their own ports, which enables the use of more than one network service at the same time. It is part of the transport layer in the TCP IP model , but of the session layer in the OSI model. Analysis The transport layer is responsible for delivering data to the appropriate application process on the host ... transport layer data packet. Together with the source and destination IP address, the port numbers constitutes a network socket , i.e. an identification address of the process to process communication. In the OSI model, this function is supported by the session layer . Some transport layer protocols ... 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
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
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
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
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 dedicated to St Mary the Virgin, rebuilt in brick in 1923 on a new site nearly a mile to the north of the old one. 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 nl Layer Breton pl Layer Breton sv Layer Breton ... 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 Commonscat 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 nl Layer Marney pl Layer Marney sv Layer Marney ... more details
The ozone layer is a layer in Earth s atmosphere which contains relatively high concentrations of ozone ... s atmosphere being only about 0.6 parts per million. The ozone layer is mainly located in the lower ... title Science Ozone Basics. accessdate 2007 01 29 ref The ozone layer was discovered in 1913 by the French .... Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations, which ... density of ozone overhead, is named in his honor. The ozone layer absorbs 97 99 of the Sun s medium ... title Ozone layer accessdate 2007 09 23 ref Origin of ozone Image Ozone cycle.svg 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 in 1930 ... the ozone oxygen cycle , thus creating an ozone layer in the stratosphere , the region from about ... of the UV C band and the more energetic UV above this band causes the formation of the ozone layer ... dioxygen. The ozone layer also blocks most, but not quite all, of the sunburn producing UV B 280 ... of the ozone in the ozone layer is very small, it is vitally important to life because ... cancer . The ozone layer which absorbs from about 200 nm to 310 nm with a maximal ... of ozone in the stratosphere The thickness of the ozone layer that is, the total amount of ozone ..., not winter in the northern hemisphere. During winter, the ozone layer actually increases in depth ... layer. The ozone layer is higher in altitude in the tropics, and lower in altitude in the extratropics ... File 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 ... aerosol spray s that are thought to damage the ozone layer. The European Community rejected an analogous ... q a.html title Brief Questions and Answers on Ozone Depletion & 124 Ozone Layer Protection & 124 ... more details
provided by a good abstraction layer allows for easy reuse by distilling a useful concept .... The OSI model ISO OSI networking model comprises seven abstraction layers. Each layer of the OSI ... Jersey isbn 0 13 148521 0 ref References references See also layer object oriented design Layer for object ... Layer Category Computer architecture af Abstraksielaag es Capa de abstracci n ko nl ... 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
In the electrochemistry , the diffusion layer contains the material that is analyzed. According to IUPAC , the diffusion layer is defined as the region in the vicinity of an electrode where the concentrations are different from their value in the bulk solution. The definition of the thickness of the diffusion layer is arbitrary because the concentration approaches asymptotically the value in the bulk solution . ref GoldBookRef file D01725 title diffusion layer concentration boundary layer ref The diffusion layer thus depends on the diffusion coefficient D of the analyte and on the scan rate V sec . It is usually considered to be some multiple of Dt sup 1 2 sup where 1 t scan rate . At slow scan rates, the diffusion layer is large, on the order of microns, whereas at fast scan rates the diffusion layer is nanometers in thickness. The relationship is described in part by the Cottrell equation . ref Bard, A. J. Faulkner, L. R. Electrochemical Methods. Fundamentals and Applications 2nd Ed. Wiley, New York. 2001. ISBN 0 471 04372 9 ref Relevant to cyclic voltammetry , the diffusion layer has negligible volume compared the volume of the bulk solution. For this reason, cyclic voltammetry experiments have an inexhaustible supply of fresh analyte. References references ru Category Diffusion ... more details
Infobox Anatomy Name PAGENAME Latin GraySubject 234 GrayPage 1068 Image Gray945.png Caption Transverse section of hair follicle. Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre l 05 DorlandsSuf 12480571 Henle s layer is the third layer of the inner root sheath of the hair , consisting of a single layer of cubical cells with clear flattened nuclei. External links WhoNamedIt synd 649 Gray s Integumentary system Category Hair anatomy Category Article Feedback 5 anatomy stub it Strato di Henle ... more details
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