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Topic: Receiver (Information Theory)


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 Relativity and GPS
The special theory, in addition to claiming the frequency received is a function of the relative velocity, also claims that the speed of light is isotropic relative to the (observer) receiver; and the GPS system uses the earth-centered non-rotating frame and also assumes the speed of light is isotropic in that frame.
In addition, the velocity effects were also inconsistent with the special theory in that they depended on the velocity relative to the earth-centered frame rather than the velocity of the receiver relative to the source, as the special theory predicted.
The effect of velocity on the rate at which clocks run is not consistent with the special-theory predictions that it should be a function of relative velocity between source and receiver.
www.egtphysics.net /GPS/RelGPS.htm

  
 Basic Communication Theory
The role of a technical communicator is to assort/assimilate the factual data which could be a long list of figures, tables, graphs and so on; understand it with the receivers' perspective and repackage it in such a way that the receiver can understand the subject at first reading.
Any technical communication is initiated keeping the receiver (audience/targeted user) in mind, for it is sheer waste of effort if it doesn't make sense to the receiver.
Different backgrounds of the receivers, mental or physical stress at the time of communication are some other facts that add to the noise.
suman_malik.tripod.com /tcg/id10.html   (1119 words)

  
 Evaluation and optimization of diagnostic tests using receiver operating characteristic analysis and information theory.
The technique combines receiver operating characteristic (ROC) analysis with information theory and cost-benefit analysis to accomplish this.
Evaluation and optimization of diagnostic tests using receiver operating characteristic analysis and information theory.
Keywords: Comparative Study Cost-Benefit Analysis *Diagnosis, Laboratory Enzyme-Linked Immunosorbent Assay False Positive Reactions Human HIV Infections/DIAGNOSIS *Information Theory Mathematics Models, Statistical Prevalence Probability *ROC Curve Software JOURNAL ARTICLE
www.aegis.com /aidsline/1990/feb/M9020162.html   (405 words)

  
 David Hume -- Moral Theory [Internet Encyclopedia of Philosophy]
In both of these works, his theory involves a chain of events that begins with the agent's action, which impacts the receiver, which in turn is observed by the spectator.
Within the context of these moral sense theories, Hume developed his own moral theory, relying on the previously established distinction between the agent, receiver, and spectator.
Hume's moral theory is of lasting importance in the history of moral philosophy both for its originality and for its influence on later moral theories.
www.utm.edu /research/iep/h/humemora.htm   (4446 words)

  
 David Hume -- Moral Theory [Internet Encyclopedia of Philosophy]
In both of these works, his theory involves a chain of events that begins with the agent's action, which impacts the receiver, which in turn is observed by the spectator.
Within the context of these moral sense theories, Hume developed his own moral theory, relying on the previously established distinction between the agent, receiver, and spectator.
Hume's moral theory is of lasting importance in the history of moral philosophy both for its originality and for its influence on later moral theories.
www.iep.utm.edu /h/humemora.htm   (4446 words)

  
 20010830: Shannon, The mathematical theory of communication
Introduces the basis for information theory wherein a communication system consists of five parts which work together to deliver a message: an information source, a transmitter, a channel, a receiver and a destination.
Presumably an adherent to Shannon's theory would suggest that the preconceptions are in fact feedback noise fed into the channel from the receiver.
Each of these parts can be represented as mathematical entities and thus empirical studies can be made of the transfer of information through the system.
www.burningchrome.com /~cdent/fiaarts/docs/999232539:18871.html   (323 words)

  
 Receiver operating characteristic - Wikipedia, the free encyclopedia
In signal detection theory, a receiver operating characteristic ( ROC) is a graphical plot of the sensitivity vs. 1- specificity for a binary classifier system as its discrimination threshold is varied.
ROC curves are used to evaluate the results of a prediction and were first employed in the study of discriminator systems for the detection of radio signals in the presence of noise in the 1940s.
In the 1960s they began to be used in psychophysics, to assess human (and occasionally animal) detection of weak signals.
en.wikipedia.org /wiki/Receiver-operator_characteristic   (323 words)

  
 Lucent Information Theory
Information Theory regards information as only those symbols that are uncertain to the receiver.
The amount of information, or uncertainty, output by an information source is a measure of its entropy.
In turn, a source's entropy determines the amount of bits per symbol required to encode the source's information.
www.lucent.com /minds/infotheory/what1.html   (120 words)

  
 Shannon's Communication Theory
Shannon's communication channel consisted of a sender (a source of information), a transmission medium (with noise and distortion), and a receiver (whose goal is to reconstruct the sender's messages).
In the study of complex systems today, we view deterministic chaotic processes as information sources and use Shannon's entropy rate, as adapted by Kolmogorov and his student Y. Sinai in the late 1950s, to measure how random a chaotic system is.
To complete his quantiative analysis of the communication channel, Shannon introduced the entropy rate, a quantity that measured a source's information production rate and also a measure of the information carrying capacity, called the communication channel capacity.
www.exploratorium.edu /complexity/CompLexicon/Shannon.html   (391 words)

  
 Receiver operating characteristic - Wikipedia, the free encyclopedia
In signal detection theory, a receiver operating characteristic (ROC), also receiver operating curve, is a graphical plot of the sensitivity vs. (1 - specificity) for a binary classifier system as its discrimination threshold is varied.
In engineering, the area between the ROC curve and the no-discrimination line is often preferred, because of its useful mathematical properties as a non-parametric statistic.
The ROC can also be represented equivalently by plotting the fraction of true positives (TP) vs. the fraction of false positives (FP).
en.wikipedia.org /wiki/Receiver_operating_characteristic   (661 words)

  
 sub-TV : Basic Antenna Theory
In the diagram above, there are two wires marked 'to receiver.' For UHF and VHF, one wire will be the copper-core and the other the copper braiding of a co-axial cable.
The electrons in the antenna, when a signal is applied, are changing their velocities continuously (i.e.
Radio waves are generated by electrons accelerating in the antenna.
www.sub-tv.co.uk /antennatheory.asp   (908 words)

  
 Information theory - EvoWiki
Mutations in a message may add information that is not desireable to the receiver; in fact, in biotic systems this is generally the case.
In Shannon information theory, the information content of a stream of bits is given by its entropy, defined as:
In Shannon's information theory, we deal with messages.
wiki.cotch.net /index.php/Information   (774 words)

  
 Information - Encyclopedia.WorldSearch
Information is a message, something to be communicated from the sender to the receiver, as opposed to noise, which is something that inhibits the flow of communication or creates misunderstanding.
The view of information as a message came into prominence with the publication in 1948 of an influential paper by Claude Shannon, "A Mathematical Theory of Communication." This paper provides the foundations of information theory and endows the word information not only with a technical meaning but also a measure.
Information is a term with many meanings depending on context, but is as a rule closely related to such concepts as meaning, knowledge, instruction, communication, representation, and mental stimulus.
encyclopedia.worldsearch.com /information.htm   (774 words)

  
 Psychology 302 Signal Detection Theory Assignment
This experiment should be cast as a test of the major aspects of Signal Detection Theory as it was presented in the lab manual and in the lectures and class handouts.
It should identify how these variables were manipulated, and the predictions which signal detection theory would make about the effects of these manipulations.
Be sure to include a plot of your overall data on the Receiver Operating Characteristic coordinates illustrated in the lab manual and discussed in class.
www.msu.edu /course/psy/302/SigDet/SigDet_assign.htm   (545 words)

  
 Electromagnetic Radiation
Coils of wire can be used to make the large electromagnets used in car junk yards or the tiny electromagnetics in your telephone receiver.
A consequence of this is that changing electric and magnetic fields should trigger each other and these changing fields should move at a speed equal to the speed of light.
Electric and magnetic fields oscillate together but perpendicular to each other and the electromagnetic wave moves in a direction perpendicular to both of the fields.
www.astronomynotes.com /light/s2.htm   (545 words)

  
 Autosophy Information Theory
To continue research on Autosophy Information Theory try the
Essential to any Autosophy communication is a “hyperspace knowledge library” which must always remain identical in both the transmitter and receiver.
The Shannon theory is now taught at university and is accepted by most experts.
www.autosophy.com /information.htm   (545 words)

  
 Information and Coding Theory Lab Home
The main focus is on channel coding/decoding (turbo codes, decoding with reliability information, space-time codes), applied information theory, digital modulation schemes (adaptive modulation and channel coding, OFDM, DS-CDMA, IDMA), as well as on modern receiver design (equalization, channel estimation, synchronization, interference rejection).
The research activities of the Information and Coding Theory Lab (ICT) of the University of Kiel are in the general area of wireless communications.
Concerning teaching, courses on channel coding, information theory, and wireless communications are offered, since the winter term 2001/02 also in English language within the framework of an International Master Program on Digital Communications.
www-ict.tf.uni-kiel.de   (156 words)

  
 Publicola
They seem to be reasoning that since receivers are identified as “pre” or “post” ban that this supports their theory that the receiver itself is subject to the “assault weapons” ban no matter what type of firearm it is actually assembled into.
Now despite his having a pre-ban receiver that was originally used on an "assault weapon" his replacement receiver may in fact be used to assemble a firearm that would not violate the "assault weapons" ban even if he had used a brand new receiver instead of a pre-ban receiver.
When they discovered that it was perfectly legal to replace a pre-ban receiver, they started to have visions of loopholes dance in their heads & did what they usually do when the legislation they demanded fails to ban each & every firearm in civilian possession: they take it to court.
publicola.blogspot.com /2004_03_14_publicola_archive.html   (156 words)

  
 Receiver and Antenna Theory Science, Directory
Harry's Homebrew Antennas, home brew radio circuits, and some theory.
Receiving Loop Theory - N4YWK Sensitivity of multi turn receiving loops.
Octaloop Antenna A gif schematic of a 8 sided antenna with mount details.
www.bpwregina.org /YnBfNzk5OTQy.aspx   (99 words)

  
 Notes on Persuasion theories
The contemporary, recent theories in this group are what we would call interactional or transactional theories, assuming both source and receiver are active, thinking participants in communicative events.
Although the theories discussed in this chapter are varied and represent centuries of thought about persuasion, they also suggest the myriad of ways that a student of persuasion can come at a message to gain understanding and appreciation for the complexity of persuasion in today's world.
The three major theories in this group (Balance, Congruity and Dissonance) assume that humans are driven by the need to maintain consistency between their knowledge, beliefs, behaviors, and experiences in the world.
www.concentric.net /~Creyn266/COMM335/Theoriesnotes.htm   (796 words)

  
 information
Information theory is difficult for many people two understand at first glance because of its mathematical nature.
Information Theory, originally developed by Claude Shannon for Bell Telephone Laboratories, was originally published in 1948.
Information and the associated concepts decrease when the number of message choices decrease, or when a few or one message is far more probable than the others.
zimmer.csufresno.edu /~johnca/spch100/information.htm   (3108 words)

  
 Karl Pribram
Possibly the most radical part of the holonomic theory is Pribram's claim that a "receiver" is not necessary to "view" the result of the transformation (from spectral holographic to "image").
The holonomic theory is based on evidence that the main computational event of neurons is the polarizations and hyper polarizations at the dendritic membranes of neurons.
The holonomic theory (for the example of vision) summarizes evidence that the image formed on the retina is transformed to a holographic (or spectral) domain.
www.qikrux.com /karl_pribram.htm   (7056 words)

  
 Signal Detection Theory Tutorial Overview
This tutorial explains the theory behind signal detection, covers several SDT measures of performance, and introduces Receiver-Operating Characteristics (ROCs).
Every day we have to make decisions about uncertain events like, 'Is that my phone ringing or one on the television?', or, 'Is the person talking to me telling the truth?' In this tutorial, you will learn about the Signal Detection Theory (SDT) model of how people make decisions about uncertain events.
The tutorial is at an introductory level, but also has optional sections appropriate for more advanced students and researchers.
wise.cgu.edu /sdt/overview.html   (247 words)

  
 Post a reply
I want to stay on topic here, which is the predictions of the theory of relativity in the Sagnac and Wang (generalized Sagnac) experiment.
The theory can't be used to prove itself wrong, therefore calculations done in different frames should agree through the theory.
If we disagree on the predictions of Aether theory, and you want to discuss it, please continue this discussion in another thread.
www.anti-relativity.com /forum/posting.php?mode=quote&p=252   (247 words)

  
 Reflex Radio Receiver
The emitter bypass cap is of a value that gives voltage gain at audio frequencies.
And now, when the "volume" (emitter bypassing) is turned up, we find that there is some audio distortion, but no heterodyne squeal.
The pot controls how much emitter bypassing there is and therefore how much audio feedback occurs.
www.tricountyi.net /~randerse/reflex.htm   (247 words)

  
 Signal Detection Theory
Classical Signal Detection Theory (SDT) assumes equal-variance Gaussian distributions to explain the origin of the Receiver Operating Characteristics (ROC).
If there are any edges, the parameters of the underlying mechanisms are most likely to change during the hours that such an experiment takes, so the exact positions of the edges will change.
Whereas it seems hopeless to improve the situation by refining the measurements of the ROC curve, there are more global measures that allow to test different hypotheses.
fechner.uni-graz.at /kaernbach/SDT.htm   (247 words)

  
 Signal Detection Theory Tutorial Overview
This tutorial explains the theory behind signal detection, covers several SDT measures of performance, and introduces Receiver-Operating Characteristics (ROCs).
Every day we have to make decisions about uncertain events like, 'Is that my phone ringing or one on the television?', or, 'Is the person talking to me telling the truth?' In this tutorial, you will learn about the Signal Detection Theory (SDT) model of how people make decisions about uncertain events.
The tutorial is at an introductory level, but also has optional sections appropriate for more advanced students and researchers.
wise.cgu.edu /sdt/overview.html   (247 words)

  
 Receiver operating characteristic - Wikipedia, the free encyclopedia
In signal detection theory, a receiver operating characteristic( ROC) is a graphical plot of the sensitivity vs. 1- specificity for a binary classifier system as its discrimination threshold is varied.
ROC curves are used to evaluate the results of a prediction and were first employed in the study of discriminator systems for the detection of radio signals in the presence of noise in the 1940s.
In the 1960s they began to be used in psychophysics, to assess human (and occasionally animal) detection of weak signals.
en.wikipedia.org /wiki/Receiver-operator_characteristic   (247 words)

  
 The Receiver Operating Characteristic (ROC) Curve
Receiver Operating Characteristic (ROC) curves plot the sensitivity of a test versus its false positive rate for various points (definitely present, probably present to definitely absent) and is especially applicable when test results are interpreted subjectively.
ROC curves were developed in the 1950's as a by-product of research into making sense of radio signals contaminated by noise.
This type of graph is called a Receiver Operating Characteristic curve (or ROC curve.) It is a plot of the true positive rate against the false positive rate for the different possible cut points of a diagnostic test.
www.mlahanas.de /MOEA/Med/ROC21.htm   (1831 words)

  
 Quantum Information: Basic Concepts
In fact, some approaches to the foundations of quantum theory (e.g., Ludwig's from the 60ies [Lu83]) are based on the view that Quantum Theory is precisely about the kind of influence transported from a preparing device (the "transmitter") to a measuring device (the "receiver").
In the theory of Quantum Information entanglement is no longer viewed merely as a means to "subtly humiliate the opponents of quantum mechanics" (C.H. Bennett), but as a resource needed to perform otherwise impossible tasks of information processing or computation.
Teleportation with purely classical means is impossible, which is precisely the observation making the theory of Quantum Information a new branch of Information Theory.
www.imaph.tu-bs.de /qi/concepts.html   (1831 words)

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