Delaytolerantnetworking DTN is an approach to computer network architecture that seeks to address the technical .... History see History of delaytolerantnetworking In the 1970s, spurred by the History of computing ... delaytolerantnetworking and the DTN acronym. A paper published in 2003 SIGCOMM conference gives ... on delay and disruption tolerantnetworking, and growing interest in combining work from sensor networks ... see Routing in delaytolerantnetworking The ability to transport, or route, data from a source ... Use of the DelayTolerantNetworking Bundle Protocol from Space , L. Wood et al. , Conference ... access methods DEFAULTSORT DelayTolerantNetworking Category Network architecture Category Network protocols de DelayTolerantNetworking fr R seau tol rant aux d lais it DelayTolerant Network nl DelayTolerantNetworking ja no Dtn pt Delaytolerantnetworking ru DTN sv DelayTolerant ... in space. Recently, the term disruption tolerantnetworking has gained currency in the United ... tolerantnetworking algorithms and began to examine factors such as security, reliability, verifiability ... for sending bundles across a network. Due to the store and forward nature of delaytolerant protocols, routing solutions for delaytolerant networks can benefit from exposure to application layer information ... issues has been a major focus of the bundle protocol. Security concerns for delaytolerant networks ... device must identify other intermittently visible devices. ref Anonymity and security in delaytolerant ... PKI schemes. Original solutions from the delaytolerant research community include 1 the use of identity ... are currently investigating the issues involved with DTN The http www.dtnrg.org The DelayTolerant ... Disruption TolerantNetworking Flight Test Results from the International Space Station. IEEE Aerospace ... mobile ad hoc networking MANET and vehicular ad hoc network ing became areas of increasing interest ... developed the initial IPN architecture, relating to the necessity of networking technologies that can ... more details
The history of delaytolerantnetworking examines the bulk of the technologies that began the field that is known today as delaytolerantnetworking . Research began as projects under space race United States government grants relating to the necessity of networking technologies that can sustain the significant delays and packet corruption of space travel. Initially, these projects looked only short range communication between manned missions to the moon and back, but the field quickly expanded into an entire sub field of DTNs that created the technological advances to allow for the Interplanetary Internet . In the 1970s, spurred by the History of computing hardware 1960s present micronization of computing , researchers began developing technology for routing between non fixed locations of computers. While the field of ad hoc routing was inactive throughout the 1980s, the widespread use of wireless protocols reinvigorated the field in the 1990s as mobile ad hoc routing and vehicular ad ... about a growing number of academic conferences on delay and disruption tolerantnetworking. This field saw many optimizations on classic ad hoc and delaytolerantnetworking algorithms and began to examine ... at delaytolerantnetworking See Routing in delaytolerantnetworking In the 2000s decade , many ... interplanetary communication into a common area of delaytolerantnetworking. References Reflist DEFAULTSORT DelayTolerantNetworking Category Network architecture ... understood in traditional computer networking . Early research efforts One of the first known references ... research in the 1980s and early 1990s in communication with the presence of a delay or disruption ... interest. Mobile Ad Hoc Networking MANET research See Mobile ad hoc network With the widespread ... increase in self organizing wireless ad hoc networking and network devices. This area ... made during the 1990s in MANETs were combined and used to develop and deploy a complete networking ... more details
Routing in delaytolerantnetworking concerns itself with the ability to Transport layer transport , or route, data from a source to a destination is a fundamental ability all communication networks must have. DelaytolerantnetworkingDelay and disruption tolerant networks DTNs , are characterized by their lack ... on Delaytolerantnetworking, 2005. ref ref name spyropoulos2007 Thrasyvoulos Spyropoulos, Konstantinos ... website http www.n4c.eu Networking for Communications Challenged Communities N4C project website DEFAULTSORT Routing In DelayTolerantNetworking Category Network protocols .... Routing in a delaytolerant network. In Proc. ACM SIGCOMM, 2004. ref . On the contrary, in disaster ..., and Raghu K. Ganti. A caching based approach to routing in delaytolerant networks. In Proceedings ... Jensen, and Brian Neil Levine. MaxProp Routing for vehicle based disruption tolerant networks. In Proc ... delay. However, due to the orbit laws of physics , it is possible to predict the future in terms of the times .... In Proceedings of the Fourth ACM International Symposium on Mobile Ad Hoc Networking and Computing ... during the EU Framework Programme 7 project http www.n4c.eu Networking for Communications Challenged ... computer networking flooding based in nature, in that if a contact is discovered, all messages ... effect performance metrics, such as average delay and message delivery ratio. The goal of RAPID ... to intentionally minimize one of three metrics average delay, missed deadlines, and maximum delay. RAPID protocol The core of the RAPID protocol is based around the concept of a utility function ... in utility. For example, assume the metric to optimize is average delay. The utility function defined for average delay is math U i D i math , basically the negative of the average delay. Hence, the protocol replicates the packet that results in the greatest decrease in delay. RAPID, like MaxProp ... is optimal in terms of minimum expected delay among all Spray and Wait schemes, assuming node movement ... more details
tocright wiktionary delay delayed delaying Delay may refer to Generally Latency disambiguation Response time disambiguation Law Theft Act 1978 Delaying payment of a debt To delay payment of a debt , a crime in the United Kingdom Telecommunications and broadcasting Broadcast delay , a practice of time shifting transmissions Delay encoding , a radio transmission technique Network delay , the delay of an IP packet within an IP network Lag , a term used when a real time application fails to respond in a timely fashion Physics and electronics Propagation delay , a measurement of the time for a signal to reach its destination Delay line disambiguation multiple meanings , one of any technologies for shifting a signal in time Audio Delay audio effect , a technology for producing delayed playback of an audio signal Computer science Delay programming , a programming language construct for delaying evaluation of an expression Sports Delay game , official ruling to abnormally stop a sporting event once it has begun due to circumstances that prevent fairness of play, such as inclement weather. See also Tom DeLay , politician disambiguation de Delay eo Malfruo fr Retard he ja ... more details
unreferenced date November 2011 notability date November 2011 Infobox video game title NetworKing collapsible state show image image Image NetworKing.png 128px NetworKing icon caption developer NASA publisher NASA distributor NASA series engine Unity game engine Unity version platforms Mac OS X , Microsoft Windows , web browser with Unity game engine Unity plug in released Video game release 2011 genre satellite simulation modes single player ratings media downloadable requirements NetworKing is an educational simulation computer game by NASA for Mac OS X , Microsoft Windows and web browsers with the Unity plug in released in 2011. In NetworKing the player assumes the role of a satellite manager responsible for growing the communications network. External links http www.nasa.gov multimedia 3d resources scan.html NetworKing Homepage http www.nasa.gov multimedia 3d resources scan manual.html Manual Unity engine games improve categories date November 2011 Category Mac OS X games Category Windows games Category 2011 video games Category Educational video games Category Simulation video games Category NASA Category Unity engine games Simulation videogame stub NASA stub ... more details
In mathematical logic , a tolerant sequence is a sequence math T 1 math ,..., math T n math of formal theory formal theories such that there are consistent extension s math S 1 math ,..., math S n math of these theories with each math S i 1 math interpretability interpretable in math S i math . Tolerance naturally generalizes from sequences of theories to trees of theories. Weak interpretability can be shown to be a special, binary case of tolerance. This concept, together with its dual concept of cotolerance , was introduced by http www.csc.villanova.edu japaridz Japaridze in 1992, who also proved that, for Peano arithmetic and any stronger theories with effective axiomatizations, tolerance is equivalent to math Pi 1 math consistency. See also Interpretability Cointerpretability Interpretability logic References http www.csc.villanova.edu japaridz G.Japaridze , The logic of linear tolerance . Studia Logica 51 1992 , pp. 249 277. http www.csc.villanova.edu japaridz G.Japaridze , A generalized notion of weak interpretability and the corresponding logic . Annals of Pure and Applied Logic 61 1993 , pp. 113 160. http www.csc.villanova.edu japaridz study.html G.Japaridze and D. de Jongh, The logic of provability . Handbook of Proof Theory . S.Buss, ed. Elsevier, 1998, pp. 476 546. Category Proof theory ... more details
Refimprove date October 2009 Network delay is an important design and performance characteristic of a computer network or telecommunications network . The delay of a network specifies how long it takes for a bit of data to travel across the network from one node or endpoint to another. It is typically measured in multiples or fractions of seconds. Delay may differ slightly, depending on the location of the specific pair of communicating nodes. Although users only care about the total delay of a network, Citation needed date October 2009 engineers need to perform precise measurements. Thus, engineers usually report both the maximum and average delay, and they divide the delay into several parts Processing delay time routers take to process the packet header Queuing delay time the packet spends in routing queues Transmission delay time it takes to push the packet s bits onto the link Propagation delay time for a signal to reach its destination There is a certain minimum level of delay that will be experienced due to the time it takes to Data transmission transmit a packet serially through a Data link link . Onto this is added a more variable level of delay due to network congestion . IP network delays can range from just a few milliseconds to several hundred milliseconds. References http www.telchemy.com appnotes Telchemy Impact of Delay.pdf Impact of Delay in Voice over IP Services http www.cs.rice.edu eugeneng papers IMC06.pdf Internet Delay Space Study at Rice University Category Computer networking ... more details
In a computer network network based on packet switching , processing delay is the time it takes Router computing routers to process the packet header . Processing delay is a key component in network delay . During processing of a packet, routers may check for bit level errors in the packet that occurred during transmission as well as determining where the packet s next destination is. Processing delays in high speed routers are typically on the order of microseconds or less. After this nodal processing, the router directs the packet to the queue where further delay can happen queuing delay . In the past, the processing delay has been ignored as insignificant compared to the other forms of network delay. However, in some systems, the processing delay can be quite large especially where routers are performing complex encryption algorithms and examining or modifying packet content. http www.ecs.umass.edu ece wolf pubs 2004 globecom.html Deep packet inspection done by some networks examine packet content for security, legal, or other reasons, which can cause very large delay and thus is only done at selected inspection points. Routers performing network address translation also have higher than normal processing delay because those routers need to examine and modify both incoming and outgoing packets. References Computer Networking A Top Down Approach by Kurose and Ross Category Computer networking Category Telecommunications terms Category Computer engineering telecomm term stub ... more details
In a computer network network based on packet switching , transmission delay or store and forward delay is the amount of time required to push all of the packet s bits into the wire. In other words, this is the delay caused by the data rate of the link. Transmission delay is a function of the packet s length and has nothing to do with the distance between the two nodes. This delay is proportional to the packet s length in bits, It is given by the following formula math D T N R math where math D T math is the transmission delay N is the number of bits, and R is the rate of transmission say in bits per second Most Packet Switching packet switched networks use store and forward transmission at the input of the link. A switch using store and forward transmission will receive save the entire packet to the buffer and check it for CRC errors or other problems before sending the first bit of the packet into the outbound link. Thus store and forward packet switches introduce a store and forward delay at the input to each link along the packet s route. See also Packet transfer delay Processing delay Queuing delay Propagation delay References Computer Networking A Top Down Approach by Kurose and Ross External links http media.pearsoncmg.com aw aw kurose network 2 applets transmission delay.html Java Applet DEFAULTSORT Transmission Delay Category Computer networks el ... more details
s generally ranges from .59c to .77c. ref name Ethernet propagation delay cite web url http stason.org TULARC networking lans ethernet 3 11 What is propagation delay Ethernet Physical Layer.html title What is propagation delay? Ethernet Physical Layer accessdate 2010 11 09 date 2010 10 21 work Ethernet FAQ ref ref name Propagation Delay cite web url http www.wildpackets.com resources compendium ethernet propagation delay title Propagation Delay and Its Relationship to Maximum Cable Length accessdate 2010 11 09 work Networking Glossary ref This delay is the major obstacle in the development ...Propagation delay is a technical term that can have a different meaning depending on the context. It can relate to Computer network networking , electronics or physics . In general it is the length of time taken for the quantity of interest to reach its destination. Networking In computer network s, propagation delay is the amount of time it takes for the head of the signal to travel from the sender ... over the specific medium. Propagation delay is equal to d s where d is the distance and s is the wave ... Full Adder Propagation Delay.svg thumb 400px A full adder has an overall gate delay of 3 logic gate ... circuit s and digital electronics , the propagation delay , or gate delay , is the length of time ... designs implementing the same logical statement. Propagation delay increases with operating ... contributor to the increase of propagation delay. If the output of a logic gate is connected to a long trace or used to drive many other gates high fanout the propagation delay increases substantially. Wires have an approximate propagation delay of 1 ns for every convert 6 in cm of length ... in the electromagnetism field, the propagation delay is the length of time it takes for a signal ... for the signal to travel through a wire. See also, velocity of propagation . See also Delay calculation Contamination delay Transmission delay Latency engineering References Reflist DEFAULTSORT Propagation ... more details
Fault Tolerant Ethernet FTE is designed to provide rapid network redundancy. Each Node networking node is connected twice to a single LAN through the dual network interfaces. The driver and the FTE enabled components allow network communication to occur over an alternate route when the primary route fails. ref http hpsweb.honeywell.com Cultures en US Products Systems ExperionPKS FaultTolerantEthernet default.htm ref FTE was created by Honeywell . References references External links http hpsweb.honeywell.com Cultures en US Products Systems ExperionPKS FaultTolerantEthernet default.htm Honeywell Fault Tolerant Ethernet Page Category Computer networking ... more details
DEFAULTSORT Queuing Delay Category Computer networking Category Telecommunications terms Category ...In telecommunication and computer engineering , the queuing delay or queueing delay is the time a job waits in a Queue data structure queue until it can be executed. It is a key component of network delay . This term is most often used in reference to router computing router s. When Packet information technology packet s arrive at a router, they have to be processed and transmitted. A router can only process one packet at a time. If packets arrive faster than the router can process them such as in a burst transmission the router puts them into the queue also called the Buffer computer science buffer until it can get around to transmitting them. The maximum queuing delay is proportional to buffer size. The longer the line of packets waiting to be transmitted, the longer the average waiting time is and when the buffer fills the router must drop packets. When the transmission protocol uses the dropped packets symptom of filled buffers to regulate its transmit rate, as the Internet s TCP does, bandwidth is fairly shared at near theoretical capacity with minimal network congestion delays. Absent this feedback mechanism the delays become both unpredictable and rise sharply, a symptom also seen as freeways approach capacity metered onramps are the most effective solution there, just as TCP s self regulation is the most effective solution when the traffic is packets instead of cars . This result is both hard to model mathematically and quite counterintuitive to people who lack experience with mathematics or real networks. Failing to drop packets, choosing instead to buffer an ever increasing number of them, produces bufferbloat . In Kendall s notation , the M M 1 K queuing model, where K is the size of the buffer, may be used to analyze the queuing delay in a specific system. Check. ref http streaming.stat.iastate.edu stat330 notes day30.pdf Dead link date November 2008 ref See ... more details
Meraki Open Mesh Village telco Mesh Potato Technical challenges Wizzy Digital Courier Delaytolerantnetworking References reflist External links Only links to sites that provide actual information about mesh networking. No links to sites that primarily exist to sell products or services. please ... nations and uses mesh networking based on the IEEE 802.11s standard to create a robust and inexpensive ... accessdate 2008 02 23 ref In Cambridge, UK, on the 3rd June 2006, mesh networking was used at the Strawberry ... Urbana Community Wireless Network CUWiN project is developing mesh networking software based on open ... metric. Additionally, the Wireless Networking Group ref cite web title Wireless Networking Group ... Wireless Networking Group url http www.crhc.illinois.edu wireless papers kyasanur2006Tech.pdf ref SMesh ... have also incorporated concepts from Mesh Networking. An examples is ITU T G.hn , a standard ... mesh network History of wireless mesh networking Distinct radio node deployments of Wireless Mesh Networking BioWeb Wireless ad hoc network Wireless community network Mobile ad hoc network MANET VANET ... view id 212 Robin Chase discusses Zipcar and Mesh networking Robin Chase talks at the Ted conference about the future of mesh networking and eco technology http www.mesh networks.org Mesh Networks Research ... topology Category Networks Category Wireless networking ca Xarxa en malla de Vermaschtes Netz es ... more details
Tape delay can mean Delay audio effect , an audio effect reminiscent of an echo Broadcast delay , the practice of intentionally delaying a radio and television broadcast of live material. disambig ... more details
Multiple issues unreferenced March 2009 context March 2009 orphan February 2009 wikify December 2010 In VHDL simulations, all signal assignments occur with some infinitesimal delay, known as delta delay . Technically, delta delay is of no measurable unit, but from a hardware design perspective one should think of delta delay as being the smallest time unit one could measure, such as a femtosecond fs . References Reflist DEFAULTSORT Delta Delay Category Hardware description languages simulation software stub ... more details
Delay line may refer to Propagation delay , the length of time taken for something to reach its destination Analog delay line , used to delay a signal Bi directional delay line , a numerical analysis technique used in computer simulation for solving ordinary differential equations by converting them to hyperbolic equations Digital delay line , a sequential logic element Delay line memory , a form of computer memory used on some of the earliest digital computers disambiguation ca L nia de retard fr Ligne retard ja pl Linia op niaj ca ru ... more details
Refimprove date July 2011 In signal processing , group delay is a measure of the time delay of the amplitude ... through a device under test , and is a function of frequency for each component. Phase delay is a similar measure of the time delay of the phase, instead of the delay of the amplitude envelope, of each ... delay will be different for the various frequencies unless the device has the property of being .... The delay variation means that signals consisting of multiple frequency components will suffer .... This changes the shape of the signal in addition to any constant delay or scale change. A sufficiently large delay variation can cause problems such as poor High fidelity fidelity in audio ... constant group delay. Introduction Group delay is a useful measure of time distortion, and is calculated ... of the device under test DUT . The group delay is a measure of the slope of the phase response at any given frequency. Variations in group delay cause signal distortion, just as deviations from linear ... displaystyle tau phi math , the group delay and phase delay respectively, are equal to the expressions ... to the same overall delay of the system and the unwrapped Phase waves phase shift of the system ... H i omega right math Additionally, it can be shown that the group delay, math displaystyle tau g math , and phase delay, math displaystyle tau phi math , are related to the phase shift math displaystyle ... math . Group delay in optics In physics , and in particular in optics , the term group delay has ... unit time, equal to math 2 pi f math , where math f math is the frequency hertz if group delay is measured ... Propagation delaydelay per unit length, which is the reciprocal of the group velocity of a particular mode. The measured group delay of a Signalling telecommunication signal through an optical ... in the fiber. It is often desirable for the group delay to be constant across all frequencies otherwise there is temporal smearing of the signal. Because group delay is math tau g omega frac d phi ... more details
Fault tolerant software has the ability to satisfy requirements despite failures. ref Cite web url http www.ece.cmu.edu koopman des s99 sw fault tolerance title Software Fault Tolerance publisher Carnegie Mellon University ref ref Cite web url http people.csail.mit.edu strumpen micro98.pdf title Portable and Fault Tolerant Software Systems publisher Massachusetts Institute of Technology ref Definition The fundamental requirement is to prevent the following from interfering with operation. Operating system failures Hardware failure Operating system failure Computer applications make a call using the application programming interface API to access shared resources, like the keyboard, mouse, screen, disk drive, network, and printer. These can fail in two ways. Blocked Calls Faults Blocked calls A blocked call is a request for services from the operating system that halts the computer program until results are available. As an example, the TCP call blocks until a response becomes available from a remote server. This occurs every time you perform an action with a web browser. Intensive calculations cause lengthy delays with the same effect as a blocked API call. There are two methods used used to handle blocking. Threads Timers Threading allows a separate sequence of execution for each API call that can block. This can prevent the overall application from stalling while waiting for a resource. This has the benefit that none of the information about the state of the API call is lost while other activities take place. Threaded languages include the following. class wikitable Ada Afnix C C CILK Eiffel Erlang Java Lisp Magenta Modula 3 Napier 88 Oz Presto pSather Perl 5.8.7 Python ... computer computing device so that the recovery delay is brief. This can be achieved using continuous ... recovery delay. Approach The general approach is to anticipate and control all failure modes using risk mitigation strategies. See also Fault tolerant design Fault tolerant system Fault tolerant computer ... more details
orphan date August 2009 Cost of Delay is the cost to bear as a result of delay in investment. Any delay in making an investment leads to a cost loss. The accrued interest on the investment for the duration of the delay has a significant effect on the net returns. The cost grows with the period of the investment longer the investment more is the cost. In simpler words, Cost of Delay is the cost as a result of delay in investment. Real World Example Image cost of delay.png right thumb 300px Cost of Delay Performance Chart based on Real World Example Alberto is planning to invest 6,000.00 USD since last 8 months. He needs the money after 5 years. He is expecting an interest rate of 10.00 compounded annually. Investment class wikitable border 1 Amount Period Interest Rate Compounding Delay Period 6,000.00 USD 5 Year 10.00 Annually 8 Month Returns class wikitable border 1 Interest Accrued Maturity Amount 3,068.17 USD 9,068.17 USD See also Rate of return on investment Finance Interest Real interest rate Single deposit Periodic deposit DEFAULTSORT Cost Of Delay Category Finance finance stub ... more details
Unreferenced stub auto yes date December 2009 In digital circuit s, the contamination delay is the minimum amount of time needed for the output of an electronic component s output to match input presented to it i.e. contamination delay hold time device internal I O propagation time . If there is insufficient delay from the output of one flip flop electronics flip flop to the input of the next, the input may change before the hold time has passed. Because the second flip flop is still unstable, its data would then be contaminated. Every path from an input to an output can be characterized with a particular contamination delay. Well balanced circuits will have similar speeds for all paths through a combinational stage, so the minimum propagation time is close to the maximum. This corresponding maximum time is the propagation delay . The condition of data being contaminated is called a race condition race . References 1. http www.nileshgoel.com wp content uploads 2010 02 timing note.pdf 2. http bwrc.eecs.berkeley.edu icbook Slides chapter10.ppt Compu hardware stub DEFAULTSORT Contamination Delay Category Timing in electronic circuits ... more details
In computer architecture , a delay slot is an instruction slot that gets executed without the effects ... the awkwardness from assembly developers and compilers. Branch delay slots When a branch instruction is involved, the location of the following delay slot instruction in the instruction pipeline pipeline may be called a branch delay slot . Branch delay slots are found mainly in Digital signal processor ... , and SPARC are RISC architectures that each have a single branch delay slot PowerPC , ARM architecture ... DSP architectures that each have a single branch delay slot include the VS DSP , NEC PD77230 ... SHARC DSP and MIPS X use a double branch delay slot such a processor will execute a pair of instructions .... pre R0 0 CALL fn DB call a function, below at label fn R1 0 first delay slot R2 0 second delay ... DB R7 0 first delay slot R8 0 second delay slot discontinuity here the JUMP takes effect next 4 instructions are called from above, as function fn fn R3 0 RTS DB return to caller, past the caller s delay slots R4 0 first delay slot R5 0 second delay slot discontinuity here the RTS takes effect end ... delay slot is a side effect of pipelined architectures due to the Hazard computer architecture ... cycle where a stall is inserted is considered one branch delay slot. A more sophisticated design ... delay slots in the in memory instruction stream, if the hardware supports this. Another side effect ... while debugging within branch delay slot. The ideal number of branch delay slots in a particular ... may not change the number of delay slots from one generation to the next. This inevitably ... behavior is followed despite no longer being relevant. Load delay slot A load delay slot is an instruction ... of the load. Load delay slots are very uncommon because load delays are highly unpredictable on modern ... is MIPS I assembly code, showing both a load delay slot and a branch delay slot. lw v0,4 v1 load word from address v1 4 into v0 nop useless load delay slot jr v0 jump to the address specified by v0 ... more details
Unreferenced date December 2009 Orphan date January 2009 Delay Box is a common slang term used in drag racing to describe an on board timer which is a Transmission Brake Delay Timer. A transbrake forces ... is applied. When the visual signal is given to start the race, the driver triggers the delay box ... is launched down the race track at the instant the timer expires counts to zero . Delay box use was very ... a delay box that violated some racing associations rules. Racing associations have imposed strict limits on delay boxes today, with manufacturers having to submit to an approval process, which has drastically reduced the number of makers of these devices. Mechanism The delay box acts as an on board ... timer is packaged in a metal enclosure when sold to drag racers, thus the slang term delay ... call this type of multivibrator a one shot . The timer box acts like a time delay relay. Many delay ... output circuitry. Drag racing delay boxes are designed to operate from the vehicles 12 volt DC electrical system. Some drag race cars now use 16 volt DC systems, in such a scenario the delay box has ... he sees a specific desired visual cue. That electrical pushbutton switch is monitored by the delay box. As long as the race car driver holds the pushbutton depressed the delay box sends 12 Volts DC or 16VDC ... the delay box and the delay box now begins an internal countdown. When the countdown timer reaches zero, the delay box stops current flowing to the solenoid in the transmission and that causes the spool ... line, accelerating rapidly forward toward the finish line. History Delay boxes began appearing in drag ... relay. Such drag racing delay timers are very crude by today s standards. Nolen IKE Hamma is credited with introducing such early devices to drag racing. currently DBA as Digital Delay, INC. Ike Hamma is deceased. His family is assigned a patent for a type of delay timer, his son Charlie Hamma is the current president of Digital Delay Inc., a manufacturer of drag racing timers. Other ... more details
Infobox musical artist name Paul deLay caption background solo singer birth name Paul Joseph deLay birth date birth date 1952 1 31 death date death date and age 2007 3 7 1952 1 31 origin Portland, Oregon ... years active c. 1970 2007 label associated acts Paul deLay Blues Band website Paul Joseph deLay ... harmonicist from Portland, Oregon Portland , Oregon . Life and career Paul deLay was born January 31, 1952 in Portland, Oregon. His musical career ref http www.pauldelay.com paul.html Paul deLay s web ... the Paul deLay Blues Band , which performed well into the 1980s. The band also sound recording and reproduction recorded several album s during that time. By the late 1980s, deLay was suffering ... month prison sentence. While he was incarcerated, his band continued without him, performing as the No deLay Band and featuring longtime Portland blueswoman Linda Hornbuckle as lead vocalist in lieu of deLay ... from prison, deLay now clean and sober rejoined the band and recorded a series of critically acclaimed albums. In 2002 deLay assembled the final version of his band, with David Vest ref http www.davidvestband.com ... The Last of the Best Live Recordings by the Paul deLay Band. ref featuring this lineup was released ... chart . Paul deLay continued touring and recording until his final illness. In March 2007, after returning to Portland from a gig in Klamath Falls, Oregon , deLay felt ill and sought medical treatment ...&coll 7 Paul deLay Big man, big notes and a big blues life. The Oregonian . ref Memorial concerts in Portland and Seattle attracted large audiences. Awards and achievements Over his career, deLay ... Krough, D. 2007, March 7 . http www.kgw.com news local stories kgw 030707 news delay dies.2b4eea2d.html Portland bluesman Paul deLay dies . KGW TV. Retrieved 09 March, 2007. ref References nowiki See ... . NAME DeLay, Paul ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH January 31, 1952 PLACE OF BIRTH DATE OF DEATH March 7, 2007 PLACE OF DEATH DEFAULTSORT DeLay, Paul Category 1952 births Category ... more details
Delay calculation is the term used in integrated circuit design for the calculation of the gate delay ... of entire paths, using delay calculation to determine the delay of each gate and wire. There are many methods used for delay calculation for the gate itself. The choice depends primarily on the speed ... slope, and generate a circuit delay and output slope. A very simple model called the K factor model is sometimes used. This approximates the delay as a constant plus k times the load capacitance. A more complex model called Delay Calculation Language, ref http standards.ieee.org reading ieee std public ... program whenever a delay value is required. This allows arbitrarily complex models to be represented, but raises significant software engineering issues. Logical effort provides a simple delay calculation ... to calculate the delay of a wire. The delay of a wire will normally be different to each destination ... wire capacitance is applied to the gate output, and the delay through the wire itself is ignored. Elmore delay ref W. C. Elmore, doi inline 10.1063 1.1697872 The Transient Response of Damped Linear ... is important but the delay through the wire itself cannot be ignored. It uses the R and C values of the wire segments in a simple calculation. The delay of each wire segment is the R of that segment ... structured, true of most nets in chips. In this case the Elmore delay can be calculated in time O N with two tree traversals. If the network is not tree structured the Elmore delay can still be computed ... related see Laplace transform . It can also be thought of a generalization of Elmore delay, which ..., as defined above, can be used for interconnect as well as gate delay. Often, it makes sense to combine ... called the stage delay . The delay of a wire or gate may also depend on the behaviour of the nearby components. This is one of the main effects that is analyzed during signal integrity checks. Delay Calculation ... of the delay information from input pin to output pin, called a timing arc. The 2D table represents ... more details
In telecommunications, the delay spread is a measure of the Multipath propagation multipath richness of a communications channel. In general, it can be interpreted as the difference between the time of arrival of the earliest significant multipath component typically the Line of sight propagation line of sight component and the time of arrival of the latest multipath component. The delay spread is mostly used in the characterization of wireless channels, but it also applies to any other multipath channel e.g. multipath in optical fibers . Delay spread can be quantified through different metrics, although the most common one is the root mean square root mean square rms delay spread, which is defined as follows According to Goldsmith ref citation last1 Goldsmith first1 Andrea title Wireless Communications date 2005 isbn 9780521837163 publisher Cambridge University Press ref , let math A c tau math be the power delay profile of a channel. Then, the mean delay of the channel is math overline tau frac int 0 infty tau A c tau d tau int 0 infty A c tau d tau math Thus, the rms delay spread is math tau text rms sqrt frac int 0 infty tau overline tau 2 A c tau d tau int 0 infty A c tau d tau math References Reflist Bibliography Saunders, Antennas and propagation for Wireless communication systems, 2nd ed, pp246 250, 2007 External links http wireless.per.nl reference chaptr03 fading delayspr.htm Delay spread in wireless communications Category Radio frequency propagation radio comm stub ko it Delay spread ... more details
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