What is Communication: Definition and 323 Discussions

Communication (from Latin communicare, meaning "to share") is the act of developing meaning among entities or groups through the use of sufficiently mutually understood signs, symbols, and semiotic conventions.
In Claude Shannon's and Warren Weaver's influential model, human communication was imagined to function like a telephone or telegraph. Accordingly, they conceptualized communication as involving discrete steps:

The formation of communicative motivation or reason.
Message composition (further internal or technical elaboration on what exactly to express).
Message encoding (for example, into digital data, written text, speech, pictures, gestures and so on).
Transmission of the encoded message as a sequence of signals using a specific channel or medium.
Noise sources such as natural forces and in some cases human activity (both intentional and accidental) begin influencing the quality of signals propagating from the sender to one or more receivers.
Reception of signals and reassembling of the encoded message from a sequence of received signals.
Decoding of the reassembled encoded message.
Interpretation and making sense of the presumed original message.These elements are now understood to be substantially overlapping and recursive activities rather than steps in a sequence. For example, communicative actions can commence before a communicator formulates a conscious attempt to do so, as in the case of phatics; likewise, communicators modify their intentions and formulations of a message in response to real-time feedback (e.g., a change in facial expression). Practices of decoding and interpretation are culturally enacted, not just by individuals (genre conventions, for instance, trigger anticipatory expectations for how a message is to be received), and receivers of any message operationalize their own frames of reference in interpretation.The scientific study of communication can be divided into:

Information theory which studies the quantification, storage, and communication of information in general;
Communication studies which concerns human communication;
Biosemiotics which examines communication in and between living organisms in general.
Biocommunication which exemplifies sign-mediated interactions in and between organisms of all domains of life, including viruses.The channel of communication can be visual, auditory, tactile/haptic (e.g. Braille or other physical means), olfactory, electromagnetic, or biochemical. Human communication is unique for its extensive use of abstract language. Development of civilization has been closely linked with progress in telecommunication.

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  1. B

    RF Network for 2-Way Communication, Security, 3.5x1.5mi Community

    I need a RF network that has this : 1) two way communication. 2) Security 3) can work in a 3.5 x 1.5 mile community : with houses, trees, buildings and a park ( https://en.wikipedia.org/wiki/Box_Hill_North,_Victoria). 4) have about 1000 endpoints. 5) low power and low cost would Xbee be...
  2. phinds

    Time Magazine: instantaneous communication via entanglement

    Damn near gagged on my breakfast this morning when reading the last sentence in an article in Time Magazine by Jeffry Kluger (a "senior writer at Time Magazine") where he said: I know we've all seen this kind of horse manure before but that doesn't make it any more palatable.
  3. I

    Faster than light communication

    Imagine a small cylinder with a dot at the top. Rotating the cylinder 1 degree clockwise of 0 degrees could signify a 1; and 1 degree anticlockwise of 0 degrees a zero. 0 degrees would be a space. Someone rotating one end of the cylinder would cause the other end of the cylinder to rotate...
  4. T

    I Is it Impossible for Entanglement > FTL Communication?

    Lots of people have wondered about whether we can get FTL communication from entanglement. My question is slightly different. Is it impossible to get FTL communication out of entanglement? If it has been shown to be impossible, then we can shut off the entanglement-FTL avenue altogether and...
  5. DrClaude

    I Bell scenarios with communication

    Bell scenarios with communication J B Brask and R Chaves Journal of Physics A: Mathematical and Theoretical, Volume 50, Number 9 (https://arxiv.org/abs/1607.08182) Abstract Classical and quantum physics provide fundamentally different predictions about experiments with separate observers that...
  6. Nikhil N

    Industrial applications of IR communication

    I need some industrial applications where IR is used for communication. Also I need to know whether can I use it to transmit my measured data of torque and temperature (measured using RTD and strain gauge) from a Rotating shaft running at 7500 rpm through IR communication ?
  7. Brunolem33

    B Gravity, time and interplanetary communication

    Imagine that we had discovered an habitable planet, Planet X, located 10 light years away from Earth, and that we had managed to establish a small colony there. Now imagine that because of a much stronger gravity than on Earth, time on Planet X would run 5 times slower than on Earth: 1 year on...
  8. C

    B Delayed choice experiment and FTL communication

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  9. P

    B Quantum communication satellite

    We all know about the launching of a entanglement based communication satellite by China. But, once a Prof. of Quantum physics has told me that it's even "theoretically impossible" as it will be violation of the "law of casualty" as the two points get information ahead of the speed of light to...
  10. L

    Communication skills for engineers

    What are the problems facing engineers with communicating information
  11. T

    MATLAB Arduino-MATLAB communication using SerialEvent() for PID Loop

    Hello, I have an arduino code for driving a peltier pile to a given set point (TEMP_SP). I am trying to input the set temperature from Matlab GUI (with different protocols, user will enter n temperatures and the time intervals, arduino will implement the PID controller and output the...
  12. Domenico94

    Communication system problem

    Homework Statement Hi everyone. I was trying to solve an exercise from the book Leon couch, communication systems, number 3.7 of the 6th edition. This is the statement: In a PCM binary system, the quantisation noise mustn t exceed the percentage value P of the peak power. Show that the...
  13. Gary0509

    I Quantum nonlocality in relation to FTL Communication

    With a modest understanding of 'spooky action at a distance', I've been informed that using entangled particles as a form of quantum bit system would not work for vast distances. It wouldn't be a viable option to communicate instantly with points like our moon, satellites orbiting Jupiter, or...
  14. R

    B Quantum communication will allow view the future and past?

    If a quantum communication device based in interlakced particles equipped with powerful telescope and radio receiver is placed far away some millions is years light. Then the images and radio signals detected, could belong to the future or past. And this info from the future or past can be...
  15. T

    I Non-EMF Wireless Communication

    Is there any theoretical room for wireless communication that does not require EMF and would be unhindered by RF blocking materials or Faraday cages?
  16. Hongo

    I Radio Comm Between 2 Points Diff Gravity: True?

    A source that is orbiting close to a singularity of a black hole is transmitting a radio frequency signal that lasts 60 seconds and is repeated infinitely. The signal is being transmitted using the amplitude modulation method (AM Radio). Let suppose that each minute passing in the transmitting...
  17. E

    B Quantum Communication: Entanglement, Interference & FTL

    is it possible to entangle two particles and then separate them buy a large distance, and then interfere with one of the particles and observe this in the other, like a quantum communication system that is faster than light?
  18. P

    B Can Entangled Particles Enable Instantaneous Communication?

    If entangled pairs can be used to communicate instantaneously, does that mean one of the paired particles has to be physically delivered to the reception point in order to establish communication?
  19. A

    RF Module Communication for Hobby Project: Using TTL or Encoders/Decoders?

    For a hobby project I got a couple of RF modules, a QAM rx2 433 receiver and a DSQAM tx1 transmitter. I understand they need some kind of TTL to work, would just using some NAND gates hooked up to the transmitter and receiver be enough or do I need something more fancy like encoders and decoders?
  20. EnumaElish

    I Physics in a universe with instant communication

    Faster-than-light communication is not allowed in this universe. Imagine a sister universe that looks much the same as ours but allows instant communication between any two points. In that universe, simultaneity can be established using instantaneous communication. How would that affect our*...
  21. W

    A Using quantum-secured communication for data transfering

    Hello! I am wondering if it is theoretically possible to allow a means of data transfer (or internet, etc.) by the idea of quantum entanglement. Correct me if I make any errors in understanding. But, by what I understand, in essence you could for instance run a computation on a quantum computer...
  22. SF Alba

    I Communicating at Near-Light Speed - Time Dilation

    So, I've been wondering: how would time dilation affect communications? For the sake of visualisation, imagine the Flash is running at 99% the speed of light in a circle around a fixed position. There's a building in this position, and inside this building are his friends. Due to time dilation...
  23. Geek007

    Does Microwave support only Line of sight communication LOS?

    Hi there, Wifi uses either 2.5 GHZ band or 5 Ghz band and these bands lie in Microwave in EM spectrum. As i read in books, Microwaves are propagated using line of sight (LOS) technique, so sending and receiving antennas should need to be aligned accordingly. But WiFi signals are broadcasted...
  24. J

    Communication faster than light or where is my mistake?

    Hello, here is some reasoning how I got possibility to communicate faster than light. Likely somewhere are mistakes, but I can not find them by myself. Let's consider very simple setup with observers Alice, Bob and a source of entangled photons in-between of them like so...
  25. D

    B FTL communication by Quantum Entanglement

    I recently stumbled across quantum entanglement and thought of an experiment. I know that the laws of physics forbid FTL communication, can anyone tell me what's wrong in my following experiment? Information, in classical bits, consists of two states, 1 and 0. To my shallow knowledge, when an...
  26. K

    I Gravitational waves as means for communication

    Hi all, this is my first post so before my question I want to show my appreciation to this community for offering a great framework to talk physics between experts and others who chose different life career paths, such as me. I have always loved physics but the math... not that much. English is...
  27. secur

    A Misunderstanding Eberhard's paper on FTL communication?

    As far as I can tell Eberhard and Ross didn't "prove" quantum entanglement can't implement FTL communication in "QUANTUM FIELD THEORY CANNOT PROVIDE FASTER-THAN-LIGHT COMMUNICATION", 1988 (http://link.springer.com/article/10.1007%2FBF00696109). But it's often cited as such a proof, in threads on...
  28. H

    B Communication with no latency using quantum entanglement

    So I was wandering why it is not possible to use quantum particles to communicate across vast distances. As I understand it we cannot send information using this as it would break the laws of physics but what I was wandering is why can't we us entangled particles in a binary why by changing the...
  29. L

    I Thought experiment: Communication beyond the particle horizon

    Refer to this image: http://imgur.com/xT20HOv The white nodes are 'stations' which broadcast signals at light speed. The blue circles around them represent the particle horizon relative to these nodes. The pink nodes are intermediary stations in between these stations that pass on the signal...
  30. Q_Goest

    Ion channels enable electrical communication in bacteria

    Here’s an interesting bit of research regarding how bacteria communicate through ion channels. It talks about biofilms which I understand as being thin films of bacteria that colonize the surface of teeth for example: The bacteria then communicate using what sounds like a 2 dimensional EM wave...
  31. C

    B Faster than light communication via entanglement?

    So quantum entanglement acts faster than light but it's not technically communication and not actually transferring "information"? Can someone explain this to me?
  32. Titan97

    Ground wave vs. sky wave stability

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  33. beyondlight

    Program for drawing communication figures

    I am doing my thesis now and I will write it in Latex. But I need some kind of program to draw figures on communication symbols such as antennas, ADC converters, block diagrams with addition/subtraction/multiplication. Probably this can be done in Latex, if so i would need some guidance on...
  34. king yasin ally

    Can I Build My Own Deep Space Antenna Network for Receiving Planetary Probes?

    I am trying to build my own communication / listening dish, multi frequency antenna, basically my own deep space antenna network. how to get the needed supply for such endeavour? help with any info on this, a new field for me. thanks!
  35. H

    How does polarizing light demonstrate the transverse nature of light waves?

    Homework Statement Explain how polarizing light shows light travels as a transverse wave. The Attempt at a Solution Light is generally an un-polarized electromagnetic wave but there are different ways that light waves are able to be polarized. I am unclear how the process of polarizing light...
  36. N

    Why is radio spectrum allocation based on archaic models?

    The FCC's propagation models for the FM broadcast band seem grotesquely inaccurate in some places, where stations can be received that the models say are absolutely out of range. I'm not even talking about DX conditions like ducting or skip, I'm talking about baseline. When I lived in...
  37. zonde

    Eberhard assumptions and FTL communication

    In this paper http://dx.doi.org/10.1103/PhysRevA.47.R747 Eberhard derives Bell type inequality from these assumptions: A theory is defined as being "local" if it predicts that, among these possible sequences of events [with the same number of events N], one can find four sequences (one for each...
  38. G

    FTL Communication in an Interstellar Civilization

    There are lots of sci-fi settings in which Mankind has become an interstellar civilization and lives on numerous planets throughout its galaxy. However, if the fastest we can communicate is at the speed of light, we will have to wait ages to receive a message between planets. Does this mean...
  39. Jim Hasty

    Quantum Communication: Instant Transmission of Messages?

    Quantum Communication. All systems described by quantum mechanics can display so-called entanglement, for example, the spin of one electron cannot be known in advance of a measurement yet will be perfectly correlated with the other, even if it is in a distant location. This has recently been...
  40. Graeme M

    Exploring Animal Communication: Is It Truly Possible?

    I have recently begun reading about human language and how it works. An obvious question that sprang to mind relates to efforts to communicate with other animals. I read Irene Pepperberg's book about her experiences with Alex the parrot, and I have seen video of interaction with Koko the...
  41. BrianS

    Can communication between two distant points be instantaneous?

    I'm working on an illustrative analogy for instantaneous communication by entangled particles. I am planning to write something along these lines, but I want to see if anyone can tell me if I'm missing something here: "Imagine a rod that is connected in a frictionless and weightless...
  42. R

    Who is RocketDr Miles and What Are His Areas of Expertise?

    Hello, I am Miles. My interests are very broad. I work in the fields of energy, communications, and space transportation, developing new systems that can hopefully solve some significant problems in these areas. My primary backgrounds are chemistry and electrical engineering, but I've...
  43. M

    Should I study Computer science or IT with Communication?

    So I am starting College this year. However, I can't decide which programme I should go with. The first option is bachelor in IT and Communication. This programme has deep content of communication (networking), but it doesn't have courses like Algorithms, Database Systems, Digital Circuits...
  44. Z

    Problem of superluminal communication in Non-local HVTs

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  45. R

    Using GHz multi-particle entanglement for FTL communication

    Although there are numerous questions about entanglement and FTL communication, I can't find anything directly related to this. I proposed a method for FTL communication via GHZ multi-particle entanglement at...
  46. Gaz

    Instantanious communication (faster than light)

    I have no idea where to put this and it isn't based on any theory's just common sense and is very simple If you get a tube and put a wire in it make it as long as you want to and to pass information simply move the wire back and forth as the whole wire is moving at the same time the information...
  47. R

    An outline on computer and communication engineering

    Is there a site which gives brief description and overview on this type of engineering? I searched google but was not able to get one giving the outline or brief introduction.
  48. B

    Communication systems -- Find the Modulation Depth....

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  49. C

    Total security communication system

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  50. curiousman

    Why are high frequencies bands chosen in satellite communication?

    Hi all, I'm an student of Physics so apologies if I'm just some silly questions here. The higher frequency bands typically give access to wider bandwidths (e.g wifi). Considering that higher frequencies bands (> 30 Ghz) are more susceptible to signal degradation due to ‘rain fade’...
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