What is Electronic: Definition and 441 Discussions

Electronic warfare (EW) is any action involving the use of the electromagnetic spectrum (EM spectrum) or directed energy to control the spectrum, attack an enemy, or impede enemy assaults. The purpose of electronic warfare is to deny the opponent the advantage of, and ensure friendly unimpeded access to, the EM spectrum. EW can be applied from air, sea, land, and/or space by manned and unmanned systems, and can target communication, radar, or other assets (military and civilian).

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  1. Cyrus

    Can Metal Cause Electronic Interference?

    Dumb question...but I don't know the answer. Is there a way to determine if a piece of metal will cause electronic interference? Is it true only for ferric metals, or can any type of metal cause transmission problems? Cya later, alligator
  2. L

    Creating Realistic Fireflies for Production of 'As You Like It

    I am the Lighting Designer for a production of 'As You Like It' and have been asked to find a way to create a realistic firefly effect. From my research, Fireflys have a dominant wavelength of 570 nanometers. They fade on quickly, pulse (a very fast fade on and off) at a rate between 2.5 and...
  3. N

    Micro electronic circuit problems

    Q1. A 10,000 Micro Farad capacitor has an asymmetric tolerance specification of +20%/-50% What is the possible range of values for this capacitor? How do I do this problem ? Q2. A 15-bit A/D converter has V(full scale) = 10 V. what is the value of the LSB> If the input voltage is 6.83 V...
  4. L

    Special Electronic Configurations

    I ony know how to explain the anomality of Cr and Cu's electronic configurations. And in the assignments, I am asked the following: (a) For Rh: Why not [Kr]4d7 5s2 but [Kr] 4d8 5s1 (b) For Ir: Why not [Xe]4f14 5d8 6s1 but [Xe] 4f14 5d7 6s2 Can someone give a brief explanation...
  5. I

    Can Carbon Nanotubes and DNA Improve Electronic Nose Design?

    I wanted to get information about how to design an electronic nose.How to get started, how to get concepts related to it.Can anyone help me?
  6. L

    Electronic Circuit Components Datasheet with Specs (12hr Deadline)

    I NEED A DATASHEET OR LIST OF ABOUT 50 EACH OF RESISTANCES, DIODES, CAPACITORS, ZENER DIODES AND ICs WITH SPECIFICATIONS LIKE VOLTAGE, CURRENT AND POWER RATING, COMMONLY USED IN ELECTRONICS LABORATORY OF COLLEGE LEVEL I NEED IT URGENTLY WITHIN 12 HOURS
  7. D

    Electronic Firework Ignition System

    I want to use a 50-pin cable to ignite e-matches connected to fireworks. The e-matches require about 1 Amp to ignite. The individual conducting wires in the cable are obviously very thin, and thus can't conduct a continuous 1 Amp current. My question though is this: can the very thin conducting...
  8. C

    Question regarding electronic ground state

    hi can anyone please help me I came across this statement "Since we only consider the electronic ground state of the system, there can be no net force or torque acting upon the subsystem of classically behaving nuclei". Can anyone explain what this means?
  9. T

    Electronic microscopy and NMR tomography/spectroscopy

    Hi! Now I am doing an undergraduate program in molecular and biological physics. At the graduate stage I would like to take part in research in the area of modern scientific instruments like electronic microscopes and nuclear magnetic resonance tomographs/spectroscopes. I know there are...
  10. wolram

    Converting from mag to electronic

    Ok magnetoes are fine buit expensive to keep in A1 condition, so i want to convert to electronic, i have the means to manufacture the body to hold the new mechanism, and guess i can tailor it to fit some prop trigger mechanism for the LT, the problem is a control for maping the required...
  11. L

    Bohr's electronic theory vs. Schroedinger equation?

    Hi, I was wondering, if the Schroedinger equation implies a continuous evolution of the state vector, then how does Bohr's theory of electron's discontinuous jumps between energy states fit in? Conversely, if an electron 'jumps' from one state to another with nothing intermediate, then how...
  12. Cyrus

    What makes a good electronics textbook?

    My electronic class is almost over, <thank god>. Unfortunately, I have what I call a "barnes n' noble" book. You know when you walk into barnes n noble and you go to the science section and you see a bunch of math/physics/engineering books. You always pick one up to see what's inside, but you...
  13. S

    How Do You Calculate Line Current for Different Connections in a 3 Phase Line?

    3 x 15Ohm resistor (R) and 3 x 3.83 mH reactors (L) are connected in different ways across a 500V, 3 phase line. without drawing a phasor diagram, calculate the line current for each of the following connections: a. R and L in series, connected in wye b. R and L in parallel, connected in...
  14. K

    What electronic comonents damaged in an EM Pulse

    I was debating on another forum about EM Pulse (yes, I just watched War of the World :tongue2: ). Anyway, does anyone know exactly what electrical components will be damaged by an EMP? I know silicon chips would be dead, but what about capactors, diodes, resistors, etc. Also, if a cars...
  15. D

    Is it possible to be a physicist for mechanic and electronic Engineers?

    Hello everybody,I am from China,and I majored in mechanic and electronic in a college. now I want to devotee myself to physic. Anybody experienced,do you think it is possible and wish you some advice. Thanks for reply,my e-mail is daifeili@163.com:rofl:
  16. E

    How Do You Find and Draw V(out) for a Sine Wave in an Ideal Diode Circuit?

    http://up4.w6w.net/upload/17-03-2006/w6w_2006031704465627806cb7.JPG for the following circuit find and draw V(out) if the V(in) signal is a sine wave with amplitude of 10V (Consider all diodes to be ideal) This is the problem , could anyone please solve it 4 me ?:?: 10x
  17. ranger

    A few Math, Physics, and Electronic links

    [invalid link removed, see next post] Contains links to video lectures, tutorials, books, and a few projects.
  18. E

    Electronic device are still alive even when they are off?

    is it true that electoronical device are still alive even when they are off? if yes why?
  19. R

    Can Electrons Jump Between Energy Levels if the Energy is Not Precisely Matched?

    It's a well known fact from Quantum Mechanics that electrons exist in fixed, quantised energy states. Also, when they move from one energy level to another, they emit or absorb the energy as required by \triangle E . Also, if a particular photon is absorbed , the apprpriate transition takes...
  20. ranger

    I'm looking for electronic kits

    Does anyone know some good quality kits and where I can order/get them. You know, the type of kit that has like over 75 projects. My budget it around $200, but that could change. --thank you.
  21. electronic engineer

    Maximizing Benefits as a Member of a Scientific Forum

    Hello all! I study electronic engineering, i want really to be an active memeber at this forum, but how could i get a benefit of this forum! If I wanted to ask about PCB or attach an eagle layout file for some correcting or for take advise from some memebers, would that be possible...
  22. A

    Music Electronic Music Fans - What's Your Bag?

    Any Electronic Music Fans here? If so what's your Bag?
  23. N

    Electronic Voice Phenomena? (EVP)

    Hi could anyone give me some informaiton on Electronic Voice Phenomena? (EVP) Thanks Is it a hoax? What are the possible explanations for it? Could it hypothetically be paranormal? Thanks
  24. N

    Medical Electronic device read their thoughts

    Could those chips which they can put in the brains of quadripletics (sorry, spelling mistake probably) which allow them to move objects by having an electronic device read their thoughts be used in other people (At a cost) for example those who wish to improve their relationships with others or...
  25. D

    Electronic and Electrical PS

    Hey, i need to give in my personal statement tomorrow, it's really urgent :cry: , so if anyone wants to have a look at it i'll pm it very quickly... THANX :!)
  26. ZapperZ

    Strongly correlated electronic systems

    If you have access to the Science journal, do not miss the Review article written by Elbio Dagotto in the latest issue (July 8, 2005)[1]. This is the most concise article on THE major issue in condensed matter physics today. Strongly correlated electron systems comprises of a number of novel...
  27. Astronuc

    Analysis of the errors in explicitly correlated electronic structure theory

    PCCP Hot paper: Theoretical breakthrough - analysis of the errors in explicitly correlated electronic structure theory
  28. B

    Why does EMP 'deactivate' electronic devices?

    Why does EMP 'deactivate' electronic devices? thanks!
  29. G

    Find the sensitivity and accuracy of electronic weighing scales?

    How would I find the sensitivity and accuracy of electronic weighing scales?
  30. K

    Best Calculator for Mechanical Design Engineering & R&D

    Which Electronic Calculator is best suitable for me ...studying MS in Mechanical Design Enginnering & working as a Design & Development Engi neer in an R & D firm... My hot areas of work are Mech anical Static & Dynamic Analysis of Strcutures(including Plate Analysis,Harmonic...
  31. A

    Understanding Dwell Time in Electronic Ignition Systems

    Hey people, been getting very annoyed for the past few hours over this one been looking through all my textbooks and all over the net but can't find a decent explanation of dwell time. Here's my question, Explain dwell time in the context of electronic ignition systems (non-contact breaker...
  32. D

    How Does Physics Enhance Electronic Fuel Injection Systems?

    I am currently in first year engineering. I am doing a project on electronic fuel injection. The project requires as much physics incorporation as possible. I am just wondering if there is anybody who has some advise or ideas for me as far as "the physics of electronic fuel injection."...
  33. R

    Electronic Configuration Question

    How come the valance electrons of MO is [KR]5s^1 4d^5 and not [KR]5s^2 4d^4
  34. Shahil

    Paper or Electronic? | Easy Poll

    Hey guys! Easy poll: Whn doing research for reports and papers, do you guys prefer Paperback journals or the electronic form?? I've just started doing proper research for projects and I really prefer the paperback type. It's so much more comforting to have something substantial in front of...
  35. A

    Exploring the Controversial World of EVP: Fact or Fiction?

    There's a new horror movie coming out called "White Noise" (which actually does look kinda scary). Central to the story is Electronic Voice Phenomenon, where a tape or video recorder captures supposed voices or images from dead people. Being a skeptic, I find it hard to accept that EVP...
  36. R

    Electronic Structure Problem

    hi this question is to do with electronic structure. What is special about the arrangement of helium, neon and argon? Please help because i really don't know! :smile:
  37. T

    Motion of point charges in electronic fields

    An electron starts at the position (0,0) with an initial velocity 5,000,000 m/s at 45 degrees angle to the x axis. THe electric field is in the positive y direction and has a magnitude of 35000 N/C. At what location will the electron strikes? Please help me setup this problem. :confused:
  38. A

    Some softwares for electronic engineering

    http://www.hpcalc.org/hp49/science/electricity/
  39. Ivan Seeking

    How to select the best electronic products

    Something reminded me of this today so I thought to pass along a highly prized secret that until now was known only to myself, and a Hawaiian mechanic who provide me with this cherished insight to technology. When making a purchase, and given two products that seem to be about equal in...
  40. D

    A good place to learn and build electronic circuit?

    i'm really into electronic but right now i have a limited knowledge of electronic circuit. Is there a place that has basic electronic projects that I can built and learn at the same time? I like the projects at http://www.aaroncake.net/circuits/index.asp but they're too advance for me. Do u...
  41. T

    Any electronic storage devices using more than 2 variables?

    I was day dreaming in my math class agian and somehow got thinking about binary and if instead of Trues's and falses or 0's and 1's it where to be soemthign like 0's 1's 2's 3's and 4's like an example 0 would be = to the binary pair 00 and 1= 01 3=10 4=11 so writting the letter a would...
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