Nyquist harry (4 risultati)
- Brossura
- Prima edizione
Da: Bingo Books 2, Vancouver, WA, U.S.A.Bingo Books 2
Contatta il venditoreVenditore con 4 stelleCondizione: Usato - Quasi ottimo
EUR 51,58
EUR 5,43 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Soft cover. Condizione: Near Fine. 1st Edition. soft cover in near fine condition.
- Rilegato
Da: Anybook.com, Lincoln, Regno UnitoAnybook.com
Contatta il venditoreVenditore con 5 stelleCondizione: Usato - Discreto
EUR 50,95
EUR 18,42 spedizioneSpedito da Regno Unito a U.S.A.Quantità: 1 disponibili
Condizione: Fair. This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,1500grams, ISBN:0879421258.
Editore: American Institute of Electrical Engineers, 1928
- Brossura
Da: JF Ptak Science Books, Hendersonville, NC, U.S.A.JF Ptak Science Books
Contatta il venditoreVenditore con 5 stelleCondizione: Usato - Molto buono
EUR 898,30
EUR 5,18 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Aggiungi al carrelloSoft cover. Condizione: Very Good. Harry Nyquist, "Certain Topics in Telegraph Transmission Theory", Bell Telephone Laboratories Reprint B-331, American Institute of Electrical Engineers, August 1928. 9 x 6 , 79pp. Original wrappers. There is a very light more than half-faded rubber stamp on the front cover, plus a small library… number written ink at top left and again very small at the base of the spine. There is also a very slight indentation in a narrow stretch of text between pp 64 and 79. Also: this is three-hole punched, which is not unusual for this publication and at this point I do believe I can say that this was done at the printer and not by the owner. VG copy.__+__ In this "classic paper" Nyquist "the founding father of digital communications" (Lisa Maliniak, Electronic design, Oct 2005)--who holds an important place in the history of electrical engineering as a pioneer of the mathematical theory of communication -- gives a "mathematical" in addition to an "engineering" point of view of the subject matter.--(N.C. Beaulieu, Introduction to "Certain topics in telegraph transmission theory , Proceedings of the IEEE, vol 90 #2.) __+__ "The Nyquist Shannon sampling theorem is a theorem in the field of digital signal processing which serves as a fundamental bridge between continuous-time signals and discrete-time signals. It establishes a sufficient condition for a sample rate that permits a discrete sequence of samples to capture all the information from a continuous-time signal of finite bandwidth." --Nyquist-Shannon Sampling Theorem, Wikipedia. [It was proved by Claude E. Shannon (January 1949) and published in the paper "Communication in the presence of noise", Proceedings of the Institute of Radio Engineers. 37 (1): 10 21. Also, Shannon salutes Nyquist for his essential work in the very first paragraph of his great paper on the mathematical theory of communication (BSTJ 1948) noting "the basis for [this] theory is contained in the important papers of Nyquist and Hartley on this subject". __+__ It is in the section Analysis of D-c. Wave and Appendix I that the famous "Nyquist rate" is established and Nyquist's sampling result is found. (Beaulieu) (There are over 3500 papers addressing some aspect of the Nyquist rate in the IEEE alone.) __+__ Also in Section III and appendix I is the beginning of the Nyquist First, Second, and Third Criterion for distortionless digital transmission. ".we find in the paper an early statement that digital communication systems will clock signaling intervals and the concept that information will be conveyed by altering some property or condition of the signal in each signaling interval. Further, it is specified that there is a finite number of conditions and that in the case of the simple telegraph, the total number of conditions is two, open and close. This is in sharp distinction to the case of telephony where there are neither simple numerical relations between the various time intervals, nor a finite number of possible current values.The Preliminary Discussion concludes prophetically, asserting that In the illustrations given, the sent waves were voltage waves. This is not necessarily the case in order for the discussion to apply. The sent wave may be a current wave, or it need not even be electrical. By providing suitable coupling the sent wave may be in the form of variations of a light beam. Interestingly, the word variations perhaps suggests that Dr. Nyquist was thinking of more than a simple on-off light beam." __+__ Among the honors awarded Nyquist are the EE Hall of Fame (IEEE), IRE Medal of Honor, and many others.
Editore: New York, 1924
- Prima edizione
Da: Atticus Rare Books, West Branch, IA, U.S.A.Atticus Rare Books
Contatta il venditoreVenditore con 5 stelleCondizione: Usato
EUR 978,25
EUR 8,20 spedizioneSpedito in U.S.A.Quantità: 1 disponibili
Aggiungi al carrello1st Edition. FIRST EDITION IN ORIGINAL WRAPPERS OF "ONE OF THE FOUNDATIONS OF INFORMATION THEORY" (Claude Shannon, A Mathematical Theory of Communication, 1948). Beginning with this lengthy twenty-two page paper (see Origins of Cyberspace 163), Nyquist's nascent work ferreting out the necessary bandwidth requirements for the tra…nsmission of information was foundational and it was critical to and enabled Shannon's development of information theory. NOTE that we separately offer Nyquist's second paper, Certain Topics in Telegraph Transmission Theory as well. Nyquist's work studied the relationship between the speed of a telegraph system and the number of signal values employed by that system. His efforts established the principles by which continuous signals could be converted into digital signals and provided "the first statement of a logarithmic law for communication" (Stanford Encyclopedia of Philosophy). Nyquist was "the first to express the amount of 'intelligence' that could be transmitted given a certain line speed of a telegraph systems and [to do so] in terms of a log function" (Origins of Cyberspace 343). Nyquist's work was also "the first examination of the theoretical bounds for ideal codes for the transmission of information" (ibid). In 1924 and while working at Bell Telephone Laboratories, Harry Nyquist's work centered upon the obvious need to improve the speed with which data transmission was carried over the wires. "In considering methods for increasing the speed of telegraph circuits [he wrote], the engineer is confronted by the problem of transmitting over a circuit the maximum amount of intelligence using a given frequency range, without causing undue interference, either in the circuit being considered or from that circuit to other circuits" (Nyquist, 1924). In the paper offered here, Nyquist considered "two fundamental factors entering into the maximum speed of transmission of intelligence by telegraph. These factors are signal shaping and choice of codes. The first is concerned with the best wave shape to be impressed on the transmitting medium so as to permit of greater speed without undue interference either in the circuit under consideration or in those adjacent, while the latter deals with the choice of codes which will permit of transmitting a maximum amount of intelligence with a given number of signal elements" (Nyquist 324). CONDITION & DETAILS: Quarto. (9 x 6.25 inches; 225 x 156mm). Complete issue in original paper wrappers; repaired at the spine and edges of front wrap; library stamp on front wrap and the first page of text (not the Nyquist paper). The issue is internally in fine condition, bright and clean throughout. The issue is housed in a custom clamshell case of blue linen, gilt-lettered at the spine. Very good condition.
