Refimprove date January 2011 The term echocancellation is used in telephony to describe the process ... . Echocancellation involves first recognizing the originally transmitted signal that re appears, with some ... using a digital signal processor DSP , but can also be implemented in software . Echocancellation is done ... of echocancellation directly into the switch meant that echo cancellers could be reliably ... devices via a software voice engine , which provides cancellation of either acoustic echo or the residual ... speech for caller input use echocancellation while speech prompts are played to prevent the systems ... cancellation Since invention at AT&T Bell Labs ref name Bell patent echocancellation algorithms have .... The acoustic echocancellation AEC process works as follows A far end signal is delivered to the system ... and the room s acoustical attributes. To configure the filter, early echocancellation systems required ... date January 2011 Until recently echocancellation only needed to apply to the voice bandwidth of telephone .... In this case, specialised products are employed to perform echocancellation. Hybrid echo ... clipping . In an ideal situation then, echocancellation alone will be used. However this is insufficient .... Here, echocancellation and suppression can work in conjunction to achieve acceptable performance .... Some telephone devices disable echo suppression or echocancellation when they detect the 2100 ... G.164 or G.165 . In the 1990s most echocancellation was done inside modem s of type v.32 and later ... use of automated echocancellation. Though they used separate incoming and outgoing frequencies ... gaps often resulted, that could not be made usable by echocancellation. These were detected and mapped ... mean squares References reflist External links http www.solicall.com EchoCancellation and Noise Cancellation for VoIP SoliCall http www.acoustictech.com EchoCancellation and Noise Cancellation for Hands ... index.htm World Class EchoCancellation Algorithms Adaptive Digital Technologies http www.dspalg.com ... more details
Multiple issues wikify March 2012 orphan February 2009 rewrite May 2009 Ingress cancellation is an advanced PHY chip PHY technology that digitally removes in channel ingress. If a carrier appears in the middle of the upstream data signal, ingress cancellation can remove the interfering carrier without causing packet loss. Ingress cancellation also removes one or more carriers that are higher in amplitude than the data signal. Ingress cancellation eventually will break if the in channel ingress gets too high. External links http www.cisco.com en US tech tk86 tk319 technologies white paper09186a0080231a71.shtml Cisco used the term when describing a product Category Digital electronics Category Technology Comp eng stub ... more details
Private cancellations are Cancellation mail cancellation s of postage stamp s, or, in some cases, artistamp s, applied by other than a government or other official stamp issuing entity. Private postmarks are commonly used with private postal meters, but in the United States there is a rule that if the time of posting is significant and there is both a private and regular cancellation, the regular cancellation controls. http www.irs.gov pub lanoa pmta01576 7400.pdf ref cite book last CCH Incorporated first CCH Tax Law Editors title Federal Tax Compliance Manual pages 9804 ref Private postmarks are also not considered in some other cases. http oah.dc.gov oah frames.asp?doc oah lib oah pdf information ui faqs.pdf They are also occasionally used to create first day of issue s for personalized U.S. postage officially defined as meter labels and thus not requiring cancellation . http www.cart.c3cachets.com product info.php?cPath 107&products id 1433&osCsid 55ac85c6f5d2c48710b78372fb97a00b Private cancellations are often applied by local post s to their stamps there are frequently also first day of issues of these . Another type of private cancellation, in the United States , is the Mailer s Postmark Permit , by which licence holders can cancel their own mail under certain conditions. They can also, in the U.S., be applied to mail carried outside the post by authority of the private express statutes . An example of this is the Torch Lake Township, Houghton County, Michigan Chickensville Location, Michigan private cancellation, applied to mail so carried although Chickensville Location does not have a post office. Private postmarks have also been used as backstamps showing the name, presumably, of the firm from which the mail was posted. http www.cdncovers.com 763usfancy.jpg In Britain private cancellations can be seen on http www.philstampcovers.co.uk Phil Stamp s covers . References references http www.stamp shop.com numismatic covers.html Robert Murray Stamp Shop, Edinburgh ... more details
Cancellation of removal is a form of immigration relief available to individuals who have been placed in removal proceedings before the United States Executive Office for Immigration Review . It was designed to replace suspension of deportation , a form of relief available prior to the passage of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 IIRIRA . A different standard for eligibility for cancellation is applied for lawful permanent residents LPRs and non LPRs. Recipients of a grant of cancellation are eligible for permanent residency in the United States. History Suspension of Deportation Prior to April 1, 1997, the effective date of IIRIRA , a form of relief known as suspension of deportation was available. Although functionally similar to cancellation relief, suspension had a lower eligibility standard and did not distinguish between lawful and non lawful resident applicants. In order to qualify for suspension relief, an applicant under the pre IIRIRA standard was required to demonstrate the following 1 Continuous physical presence in the United States for a period of seven years br 2 Good moral character during this period and br 3 That the applicant s removal would result in extreme hardship to the applicant or any qualifying United States citizen or LPR relatives, including an applicant s spouse, parents, and or children. Cancellation of Removal ... from cancellation relief. Pursuant to INA 240A a , cancellation is available for any LPR who 1 Has ... them deportable and or inadmissible. The application form for LPR based Cancellation of Removal is the http www.justice.gov eoir eoirforms instru42a.htm EOIR 42A . Cancellation of Removal for Non Permanent Residents Pursuant to INA 240A b , cancellation is available to a non permanent resident of the United ... permanent resident. The application form for non LPR based Cancellation of Removal is the http www.justice.gov ... html uscode08 usc sec 08 00001229 b000 .html 8 U.S.C. 1229b, Cancellation of Removal, Adjustment of Status ... more details
. Cancellation Date The date a policy s coverage is cancelled prior to the normally expiration .... Cancellation insurance Short Rate Old Short Rate Short rate old short rate and Cancellation insurance ... premium would be returned to the insured if the policy is canceled using pro rata cancellation method ... online insurance glossary terms w written premium.aspx ref Cancellation cover for travel insurance Cancellation cover applies if you have booked a trip to take place within the policy period, but you ... your control, and of which you were unaware at the time you booked the trip. Cancellation cover ... Cancellation Insurance Category Insurance terms es Cancelaci n de p liza ru ... more details
by another number, the cancellation law holds for addition, subtraction, multiplication and division of real number real and complex number s, there are a number of algebras where the cancellation ... vectors. For the same reason, the The cross product of two vectors also does not obey the cancellation ... obey the cancellation law. If AB AC and A O, then one must show that matrix A is invertible i.e. has ... matrix A . See also Grothendieck group Invertible element Cancellative semigroup DEFAULTSORT Cancellation ... more details
An anomalous cancellation or accidental cancellation is a particular kind of arithmetic procedural error that gives a numerically correct answer. An attempt is made to Reduction mathematics reduce a Fraction mathematics fraction by canceling individual Numerical digit digit s in the numerator and denominator . This is not a legitimate operation, and does not in general give a correct answer, but in some rare cases the result is numerically the same as if a correct procedure had been applied. ref Mathworld title Anomalous Cancellation urlname AnomalousCancellation ref Examples of anomalous cancellations which still produce the correct result include math frac 64 16 frac 6 4 1 6 frac 4 1 4 math extra space for legibility math frac 26 65 frac 2 6 6 5 frac 2 5 math extra space for legibility math frac 98 49 frac 9 8 4 9 frac 8 4 2. math ref name boas Ralph P. Boas, Jr Boas, R. P. Anomalous Cancellation. Ch. 6 in Mathematical Plums Ed. R. Honsberger . Washington, DC Mathematical Association of America Math. Assoc. Amer. , pp. 113&ndash 129, 1979. ref The article by Ralph P. Boas, Jr Boas analyzes two digit cases in base exponentiation base s other than base 10 , e.g., 32 13 2 1 is the only solution in base 4. ref name boas References reflist Category Arithmetic br numtheory stub vi Gi n c d th ng ... more details
File Cover Bahamas 1929 front.jpg thumb 225px 1929 machine cancellation used to cancel 1d stamp on first ... 70 identifying Boyle, County Roscommon Boyle , diamond bars for Ireland A cancellation or cancel for short ... location, although the term often is used interchangeably with cancellation. ref L.N. Williams ... The portion of a cancellation that is designed to deface the stamp and does not contain writing is also ... . Some stamps are issued pre cancelled with a printed or stamped cancellation and do not need to have a cancellation added. Cancellations can affect the value of stamps to collectors, positively or negatively ... a stamp has escaped cancellation and marks it with a ball point pen or marker pen marker . Image Sicily13.JPG thumb right 1859 stamp of Sicily with deferential cancellation designed not to deface the sacred ... punching a hole through its middle. These forms of cancellation must be distinguished from perfins .... High speed cancellation machines were first used in Boston between 1880 1890 and subsequently throughout .... Hand cancellation is often used when sending unusually shaped mail or formal mail e.g., wedding invitations to avoid damage caused by machine cancellation. Postal meter stamps and similar modern printed ... produced and can not readily be re used. Types of cancellations Socked on the nose Bullseye cancellation also called Socked on the nose or SOTN, is a stamp collector s term for a cancellation, typically ... instances, the cancellations are actually printed as part of the stamp itself. Deferential cancellation is a cancellation designed so as not to deface the image of the ruler or regent on the stamp ... as well as the cancellation. ref http glossary.usstamps.org glossary5.html ref Fancy cancels . In the second ... Cornell, The tale of the kicking mule a handbook dealing with the famous kicking mule cancellation ... day of issue. Flag cancellations are a type of machine cancellation incorporating a design of the United ... memory.loc.gov mbrs awal 0870.mpg here . Mute cancel refers to a cancellation that includes no writing ... more details
Flight cancellation occurs when an airline cancels a scheduled flight for a certain reason. When flights are canceled, passengers may be entitled to compensation due to rules obeyed by every flight company, usually Rule 240, or Rule 218 in certain locations. This rule usually specifies that passengers may be entitled to certain reimbursements, including a free room if the next flight is the day after the canceled one, a choice of reimbursement, rerouting, phone calls, and refreshments. References Unreferenced date July 2008 references See also Regulation 261 2004 Commercial air travel aviation stub Category Airline tickets Category Transport reliability id Pembatalan penerbangan ... more details
Unreferenced date February 2007 Project cancellation hits around half of U.S. software development projects, whether developed for in house corporate use or for sale as retail software . When a project is cancelled early on, it has little financial impact but if project sponsors wait until the project has gone over budget the cost can be enormous. The arguments made here are very questionable. Software engineers and business analysts have studied the reasons for project cancellation. Most are due to poor planning or the utter lack of planning. The biggest worry and most troublesome concern for Line of Business Executives is the waste of resources that occurs when projects are cancelled. Some project cancellations are widely reported and acknowledged in the media the most notorious example in 2005 being the failed 170 million FBI project to update their case management system. Since no one wants to admit failure, especially public companies, the vast majority of internal corporate project cancellations are performed quietly and are not as widely reported as the FBI case. However, it is generally understood by most business people that cancellations do occur regularly in their organizations. A related topic is deciding when to cancel a project. Earlier identification and action will permit project resources to be re deployed to other projects. Based on the number of projects that a company is pursuing at any given time, the total value of cancelled project s could be as much as 10 of the total annual IT development budget. Cancelled projects are not generally analyzed when developing ROI calculations. See also Business Analysis Reduce waste and complete projects on time Completing projects on time Category Project management ... more details
The Echo may refer to The Echo novel The Echo novel , a novel by Minette Walters The Echo , a 1998 TV movie based on the above novel directed by Diarmuid Lawrence and starring Clive Owen and Joely Richardson The Echo 1915 film The Echo 1915 film , an American silent short romantic drama directed by Tom Ricketts Sigaw , a Filipino horror film, released internationally as The Echo The Echo 2008 film The Echo 2008 film , a horror film based on the Filipino film starring Jesse Bradford and Iza Calzado The Echo , an opera by Frank Patterson premiered in June 1925 with tenor Forrest Lamont and soprano Marie Rappold The Echo venue , a live music venue in Los Angeles, California The Echo Irish newspaper The Echo Irish newspaper Liverpool Echo , Liverpool newspaper Southern Daily Echo , English newspaper, commonly known as the Daily Echo or simply The Echo The Echo , common name for the South Wales Echo , a newspaper in Cardiff, Wales The Echo , a Broadway musical that introduced the song, Skidamarink disamb it The Echo ... more details
In television, cancellation also known colloquially as axing refers to the termination of a television program program by a television network network , typically but not always because of low viewership and or unfavourable critical reviews. Another reason why television programs can be cancelled is to make room for new television programs. Shows whose runs end due to a mutual creative decision by its producers and cast such as Seinfeld or The Sopranos are not considered to be cancelled but rather concluded or ended . The Friday night death slot is a perceived graveyard slot in United States American television, referring to the idea that a television program in the United States scheduled on Friday evenings is destined for imminent cancellation. Overview Commercial television is supported by television advertisement advertising . Viewing figures are collected by audience measurement ratings agencies such as Nielsen ratings Nielsen in the United States , and the programs with the highest viewing figures command a higher advertising fee for the network. As such, shows with a low viewership are generally not as profit economics profit able. In the United States, the number of viewers within the 18 49 age range is more important than the total number of viewers. ref name demos cite news author Storey, Michael url http www2.arkansasonline.com news 2009 apr 23 tv column not 18 49 age group tv execs wr 20090423 title THE TV COLUMN Not in 18 49 age group? TV execs write you off date 2009 04 23 work Arkansas Democrat Gazette accessdate 2008 05 02 ref ref name nyt cite news author Carter, Bill url http www.nytimes.com 2010 04 07 business media 07adco.html title An Idol Ratings Loss ... science fiction program, so even if the game show has lesser ratings it may survive cancellation .... Saved from cancellation Occasionally, a show may be brought back into production after being previously ... of shows. Both franchises also produced spin off films in the periods they were cancelled. Cancellation ... more details
Wikify date February 2011 Double Deck Cancellation Hearts is a variant of Hearts card game Hearts for 6 11 players. With a large number of players Hearts can be played with two decks. This allows each player to hold more cards and gives a four person feel to the game. However, this means that there are two of each card and can lead to confusion about which is the highest card to take the trick. The normal convention when playing with two decks is that identical cards cancel each other out. For example, if hearts is lead, and both Aces of Hearts are played then they cancel each other out yet still count as points and the next highest card takes the trick. If all the cards are canceled on that particular trick, then they go to whoever takes the next trick. This double deck variation also adds a strategy often called The Aardvark, in which a player leads the queen of spades hoping that the other player holding the queen of spades will also play it, thus canceling them out from being the highest cards, and giving 26 points to the unfortunate player who takes the trick. ref http www.region3.us.mensa.org connections gameinfo ddch primer.pdf ref References Reflist cite book title Bicycle Official Rules of Card Games last Kansil first Joli Quentin ed. coauthors Braunlich, Tom year 2004 edition 90th publisher The United States Playing Card Company location Markham, Ontario isbn 1 889752 06 1 pages 166 Category Whist family of card games card game stub ... more details
wiktionary echoEcho most commonly refers to Echo phenomenon , the reflection of a sound. It may also refer to Science and technology Echo satellite , one of the first communications satellites EChO , a proposed European Space Agency mission to study exoplanet atmospheres. Echo sounding , a way to measure water depth Light echo , a visual phenomenon Signal reflection , a concept in telecommunications ECHO Clearinghouse , NASA s registry of Earth Science data and services, an early SOA example An Echo is a multiple reflection of sound which can happen in a covered area Computing Echo command , a Unix, DOS and Microsoft Windows command to display a line of text Echo computing , a feature of telecommunications protocols Echo framework , a web framework for Java programming The Echo Protocol , an Internet ... strings A discussion forum on FidoNet Medicine ECHO echocardiography , an imaging technique used ... echo , involuntary repetition or imitation, as in echolalia and echopraxia Fiction and mythology Echo mythology , a nymph Echo Marvel Comics , a superheroine in the Marvel universe Echo DC Comics , a name that has been used by a number of different characters in works published by DC Comics. Query and Echo ... EchoEcho Dollhouse Echo Dollhouse , the protagonist of science fiction TV series Dollhouse Echo comic book Echo comic book , a comic book title by Terry Moore, launched in 2008 Echo 1997 film Echo 1997 film , a 1997 TV film Echo 2003 film Echo 2003 film , a 2003 short film directed by Tom Oesch Echo 2007 film Echo 2007 film , a 2007 Danish film Echo novel Echo novel , a 2000 fantasy novel by Francesca Lia Block Echo Secrets of the Lost Cavern , a video game A race of aliens from the UK TV series Invasion Earth TV series Invasion Earth TV series Echo Nightray, a female character in the anime and manga Pandora Hearts Music Echo music award The Echo venue The Echo Label , a record label Echo Orbiter , an indie band Echo & the Bunnymen , a band Echo producer , a reggaeton producer Albums Echo ... more details
ECHO may stand for ECHO European Commission , the European Community Humanitarian aid Office ECHO music award , a German music award Echo 1 communications satellite Shortened Echocardiography Echovirus Enteric Cytopathic Human Orphan virus ECHO Lake Aquarium and Science Center in Burlington, Vermont Extended Care Health Option , a supplemental insurance program for disabled dependents of U.S. uniformed service members ECHO IV, Electronic Computer for Home Operation , an experimental home computer from 1966 See also Echo disambiguation Eck disambig es ECHO ... more details
refimprove date March 2011 Wikify date March 2011 The Exoplanet Characterisation Observatory EChO is a proposed space telescope that has been selected for further studies as part of the Cosmic Vision roadmap of the European Space Agency , and is competing with three other missions for the M3 slot in the programme. EChO will be the first dedicated mission to investigate exoplanetary atmospheres, addressing the suitability of those planets for life and placing our Solar System in context. EChO will provide high resolution, multi wavelength spectroscopic observations. It will measure the atmospheric composition, temperature and albedo of a representative sample of known exoplanets, constrain models of their internal structure and improve our understanding of how planets form and evolve. It will orbit around the L2 Lagrange point, 1.5 million km from Earth in the anti sunward direction. See also MarcoPolo R LOFT References See http en.wikipedia.org wiki Wikipedia Footnotes on how to create references using ref ref tags which will then appear here automatically Reflist External links Official site http www.echo spacemission.eu http sci.esa.int science e www object index.cfm?fobjectid 48467 ESA Announcement Article European Space Agency Space observatories Category European Space Agency probes Category Spaceflight Category Unmanned vehicles Category Proposed spacecraft Category Space telescopes ESA stub fr Exoplanet Characterisation Observatory ru EChO ... more details
for2 the Ben 10 alien List of Ben 10 aliens EchoEcho List of Ben 10 aliens Infobox album See Wikipedia WikiProject Albums Name EchoEcho Type Album Artist Carbon Leaf Cover Echo Echo.jpg Released March 31, 2001 Genre adult album alternative Length 71 01 Label Vanguard Records Producer John Morand Last album Ether Electrified Porch Music br 1999 This album EchoEcho br 2001 Next album 5 Alive br 2003 Album ratings rev1 Allmusic rev1Score Rating 4 5 ref Allmusic class album id r538693 pure url yes ref EchoEcho is Carbon Leaf s fourth album. It was released in 2001 by the band s own label, Constant Ivy Records. Track listing The Boxer 3 26 Wandrin Around 4 00 On Any Given Day 5 04 Torn to Tattered 5 29 Mellow Tone 4 18 Shine 3 36 Mary Mac 2 57 I Know the Reason 4 27 Lonesome Pine 4 02 Follow the Lady 5 33 Desperation Song 5 26 Toy Soldiers 4 37 Maybe Today 10 29 Dear 7 37 Bonus Track Release The Boxer went on to bring Carbon Leaf local, regional, and even some national recognition. In January 2002 Carbon Leaf won the first ever American Music Award s Presents the Coca Cola New Music Award for The Boxer. Fact date June 2009 As part of winning they performed The Boxer live on the AMAs to 80 million television viewers worldwide. Following this appearance, The Boxer entered regular rotation on radio stations including Washington, DC s DC101 WWDC FM WWDC 101.1 FM . Fact date June 2009 Notes reflist Category 2001 albums Category Carbon Leaf albums 2000s indie rock album stub ... more details
Adaptive feedback cancellation is a common method of cancelling audio feedback in a variety of electro acoustic systems such as digital hearing aid s. The time varying acoustic feedback leakage paths can only be eliminated with adaptive feedback cancellation. When an electro acoustic system with an adaptive feedback canceller is presented with a correlated input signal, a recurrent distortion artifact, Entrainment physics entrainment is generated. There is a difference between the system identification and feedback cancellation. Adaptive feedback cancellation has its application in echocancellation . The error between the desired and the actual output is taken and given as feedback to the adaptive processor for adjusting its coefficients to minimize the error. http www.hearingreview.com graphics mags 0604 f06a.jpg In hearing aids, feedback arises when a part of the receiver loudspeaker signal is captured by the hearing aid microphone s , gets amplified in the device and starts to loop around through the system. When feedback occurs, it results in a disturbingly loud tonal signal. Feedback is more likely to occur when the hearing aid volume is increased, when the hearing aid fitting is not in its proper position or when the hearing aid is brought close to a reflecting surface e.g. when using a mobile phone . Adaptive feedback cancellation algorithms are techniques that estimate the transmission path between loudspeaker and microphone s . This estimate is then used to implement a neutralizing electronic feedback path that suppresses the tonal feedback signal. ref Widrow, Bernard. Adaptive Signal Processing . ISBN 0 13 004029 0 ref ref Method of and means for adaptively filtering screeching noise caused by acoustic feedback by D Graupe, J Grosspietsch, SP Basseas US Patent 4,783,818, 1988, filed 1985 ref References references Category Acoustics electronics stub ... more details
http www.iec.org online tutorials echo cancel topic01.html?Next.x 36&Next.y 12&Next Next History of EchoCancellation Category Communication circuits Category Telephony ...An echo suppressor sometimes acoustic echo suppressor AES is a telecommunications device used to reduce the Echo phenomenon echo heard on long telephone Telecommunication circuit circuits , particularly circuits that traverse satellite links. Echo suppressors were first developed in the 1950s in response to the first use of satellites for telecommunications, but they have since been largely supplanted by better performing echo canceller s. Operation Echo suppressors work by detecting if there is a voice signal going in one direction on a circuit, and then inserting a great deal of loss in the other direction. Usually the echo suppressor at the far end of the circuit adds this loss when it detects voice coming from the near end of the circuit. This added loss prevents the speaker from hearing his own voice. Limitations While effective, this approach leads to several problems Double talk It is fairly ... each echo suppressor will then detect voice energy coming from the far end of the circuit, the effect ... parties. To prevent this, echo suppressors can be set to detect voice activity from the near end ... end speaker are talking. This, of course, temporarily defeats the primary effect of having an echo suppressor at all. Clipping Since the echo suppressor is alternately inserting and removing loss, there is frequently ..., the near end speaker will hear that background noise while the far end speaker is talking, but the echo ... dead. Echo suppressors cause effects that are frustrating for both parties to a call, although they do effectively deal with the echo. In response to this, AT&T Bell Labs developed echo canceler theory in the early 1960s, which then resulted in laboratory echo cancelers in the late 1960s and commercial echo cancelers in the 1970s. Current uses In modern times, the main use of an AES over an AEC ... more details
Echo I may refer to an Echo class submarine Echo class submarine of the Soviet Navy Project EchoEcho satellite , NASA s first communications satellite disambig ... more details
Echo II may refer to an Echo class submarine Echo class submarine of the Soviet Navy Project EchoEcho satellite , NASA s first communications satellite disambig ... more details
Volcanic flight cancellation or volcano airline crisis may refer to 2011 Puyehue eruption Transport disruption , in Chile, Argentina, New Zealand, Australia Air travel disruption after the 2011 Gr msv tn eruption , in Iceland, Europe Air travel disruption after the 2010 Eyjafjallaj kull eruption , in Iceland, Europe 2010 eruptions of Mount Merapi Air travel disruption , in Indonesia dab ... more details
In the mathematical subject of group theory , small cancellation theory studies groups given by Presentation of a group group presentations satisfying small cancellation conditions , that is where defining relations have small overlaps with each other. It turns out that small cancellation conditions ... presented group s satisfying sufficiently strong small cancellation conditions are word hyperbolic ... . Small cancellation methods are also used for constructing Tarski monster group Tarski monsters , and for solutions of Burnside s problem . History Some ideas underlying the small cancellation theory ... for small cancellation theory this paper provided a solution of the word problem for a class of groups satisfying a complicated set of combinatorial conditions, where small cancellation type assumptions played a key role. The standard version of small cancellation theory, as it is used today ... Mathematik, vol 12 1961 , pp. 94&ndash 96. ref who primarily dealt with the metric small cancellation ... 6 small cancellation condition have word problem solvable by Dehn s algorithm. The theory was further ... the case of non metric small cancellation conditions and developed a version of small cancellation ... cancellation theory was further generalized by Alexander Ol shanskii who developed ref name Ol Alexander ... graded small cancellation theory to construct various monster groups, including the Tarski monster group .... Mat., vol. 32 1968 , no. 3, pp. 709&ndash 731. ref Small cancellation theory supplied a basic set of examples ... of G . Metric small cancellation conditions Let 0 &lambda 1. Presentation as above is said to satisfy the C &lambda small cancellation condition if whenever u is a piece ... r . Here v is the length of a word v . The condition C &lambda is sometimes called a metric small cancellation condition . Non metric small cancellation conditions Let p &ge 3 be an integer. A group presentation as above is said to satisfy the C p small cancellation condition if whenever ... more details
Echo Bay may refer to Echo Bay, British Columbia Echo Bay, Nevada Echo Bay, Ontario Echo Bay, Saskatchewan See also Echo Bay Mines Port Radium, Northwest Territories , previously Echo Bay geodis Long comment to avoid being listed on short pages de Echo Bay ... more details
Universal Ship Cancellation mail Cancellation Society USCS is an international Philately philatelic non profit organization with an interest in postmark s and Cover philately covers from all maritime services. Founded in 1932, the USCS is one of the oldest specialized Mail postal history societies in the world and the only organization in the United States devoted to navy and maritime covers. As of 2008, the USCS consists of about 1,300 members worldwide. Member s interests includes topics such as navy ships of all countries, merchant ships with Seapost Service seapost and wiktionary paquebot paquebot markings, the Marine Corps and the Coast Guard, navy bases, related cachet s and other navy memorabilia. Advancing the hobby & conducting research The USCS holds annual conventions in various cities throughout the United States and has local chapters in many cities in the United States and Europe. The USCS also uses study units formed by members to research specialized interests and maintains a photograph library with over 3,000 negatives of ships. Publications The USCS publishes the following USCS Log . Monthly 32 page journal with articles of lasting interest on Navy, Coast Guard, Marine Corps, and other maritime covers and historical articles of various U.S. and foreign ships. ref Department of the Navy Naval Historical Center, http www.history.navy.mil library guides newsletters.htm Newsletters in the Navy Department Library , Navy Historical Center website , April 04, 2007. Retrieved on August 30, 2007. ref USCS Handbook . Contains basic information for collectors, including a postmark primer, naval terms dictionary, hull Taxonomy classifications , and the society history. Catalog of United States Naval Postmarks . A reference of nearly a century of postal history. ref .... See also Cachet Cancellation mail Cover philately Philately Postmark Seapost Service Ship cover References ... External links http www.uscs.org Universal Ship Cancellation Society homepage Category Philatelic ... more details
Encyclopedia
top
