Detection Definition and 339 Threads

  1. benzun_1999

    Designing a Small Location Detection System with RFID Tags

    hi, i need help... i am planing to design a small location detection system within a room using RFID tags or some resonace technique. Each object must have a unique identification code. I intend to place 4 detectors like Satellites to determine the exact position of the object... I need...
  2. A

    Speed of sound and sound detection lag between ears

    Homework Statement One cue your hearing system uses to localize a sound (i.e., to tell where a sound is coming from) is the slight difference in the arrival times of the sound at your ears. Your ears are spaced approximately 20 cm apart. Consider a sound source 5.0 m from the center of your...
  3. E

    How to Choose the Right CRC for High Confidence Error Detection?

    Hi, I have a small fixed size packet of information that I want to transmit and detect errors with a high degree of confidence (no correction is required). I'm guessing that a CRC is probably the way to go but don't know how to work out what form of CRC to use. I want to be able to specify a...
  4. H

    Will Detection Of Higgs Boson Complete Standard Model?

    We are pinning high hopes on LHC experiment. One of the expected results of the experiment is detection of Higgs Boson that would complete the standard model. In fact, discovery of Higgs Boson would complicate the theoretical issues because then we will need to find out.. a. origin of Higgs...
  5. P

    Chemical detection by irrediation?

    Some complex/man made molecules decompose so as to leave detectable components. The detection of these components may be accomplished by QA or a good nose. However, is it possible to irradiate the suspected components with a resonant energy thereby exposing it’s existence?
  6. V

    Detection of multiple hits of neutrons.

    Hi all, I have a question, which sounds somewhat silly, but I'm stuck with it. I'm writing some monte carlo code to simulate the effect of multiple hits on neutron detectors, and I'm confronted with the following issue. Consider a "multiple hit" of a detector. That means, a neutron impact at...
  7. F

    [3-in-1] Radioactivity detection, Lightning & Magnetic field strength

    1) Methods/equipment for radioactivity detection. For my high-school Chemistry studies, needs clarification. Geiger counter: A small chamber contains a high voltage electric field inside filled with inert gas. When ionizing particles/radiation enters the chamber, it will ionise the...
  8. P

    Finding a Good DC Peak Detection Circuit

    hi i was wondering if anyone could tell me of any good dc peak detection circuits. the voltages i am measuring are varying by one hundredth of a volt. i have been using the peak detector on the wqikipedia website but the circuit doesn't seem to store the peak voltage as the reading on the dmm...
  9. D

    Can a Michelson Interferometer Detect Gravitational Waves on a Small Scale?

    I am doing a project on GW Detection , pls tell me if there is anyway I can prove GW presence at project level (as in apparatus shouldn't be too buly or big as like LIGO or somehting ) ...I have built a Michelson Interferometer , but how do I prove there is a distortion in spacetime using...
  10. W

    Which Algorithm for Motion Detection Between Consecutive Images?

    there seem to be no forum for applied math on PF, but can anyone here point me to simplest yet efficient yet not covered by evil patents algorithm for motion detection between two/more consecutive images?
  11. D

    Gravitational Wave Detection Project Help

    I am doing a project on Gravitational Wave Detection Techniques, and I am already done with preparing the apparatus for that , its kid of Michelson Interferometer with some minor additions , the wave detection is based on the same basic principle of fringe shift due to path difference in two...
  12. L

    Creating a 3D Linear Motion Detection System for Scientists

    Hi, I need to make a 3d linear motion detection system for, oh... say a ball. I was thinking of setting up 3 small base stations that would ping something inside the ball and would be wired to a microcontroller that would use a triangulation algorithm to figure out the displacement of the ball...
  13. L

    How Can Video Technology Help with 3D Linear Motion Detection?

    Hi, I need to make a 3d linear motion detection system for, oh... say a ball. I was thinking of setting up 3 small base stations that would ping something inside the ball and would be wired to a microcontroller that would use a triangulation algorithm to figure out the displacement of the ball...
  14. P

    What Does 'Gain of the Detection System' Mean in Particle Detection?

    In the context of detectors of gamma rays, electrons etc. Does the term 'gain of the detection system' mean the ratio of the number of registered counts per bombardment from radioactive source?
  15. C

    Help: Learning Probability of Detection and False Alarm

    I am reading a radar book about probability of detection and false alarm. The book present the basic idea of the two concepts, but did not go deep into the details of mathematical derivations, which I would like to see. Can anyone suggest some books or online resources (not necessarily has to be...
  16. U

    Detection of Elementary Particles

    By what means do scientists detect the presence of elementary particles? How do we know what we are looking at through these means of detection? Thanks
  17. M

    RF Detection for Radio-Controlled Vehicles: Need Advice

    I'm looking to make/buy an RF(radio frequency) to detect and display the level of an incoming RF signal. This is going to be used on a radio controlled vehicle. Any suggestions and info would be greatly appreciated.
  18. E

    Neutrino detection by inverse beta decay

    Hi, I have the following question: Neutrinos can be detected by an inverse beta-decay. The probability for an interaction of a neutrino and a proton is 10^(-43). How large should be a detector filled with water in order to let interact one of 1 million neutrinos with a proton? What would be...
  19. A

    Probability Question about Error Detection

    This probability question came up in our networking tutorial today, and I'm not entirely happy with the TA's solution, so I was hoping someone here could help out. Background: A single parity bit is added to every n bits in a binary string of length 2n. In our class, we add the parity bit so...
  20. H

    Medical Stimulus detection during relative refractory period

    I have a question about how neurons respond to stimuli during the relative refractory period of an action potential. During the relative refractory period, it is relatively more difficult for a neuron to undergo another action potential due to hyperpolarization, but it is possible. In general...
  21. wolram

    Detection of gamma-ray bursts (GRBs)

    http://arxiv.org/abs/astro-ph/0509303 Authors: Volker Bromm, Abraham Loeb Comments: 8 pages, 2 figures, submitted to ApJ Detection of gamma-ray bursts (GRBs) from redshifts z > 7 would open a new window into the earliest epoch of cosmic star formation. We construct separate star...
  22. bayan

    Can You Determine the Correct Wavelength Measurement in Physics Class?

    hi guys, in our physics class today we were trying to get a more accurate length than the one stated on the device (2.8 cm). We used a microwave reciever and a device that would detect maxima and minima (there was a aluminiun plate at the back which would reflect some wave.) We foun the...
  23. M

    Can EM fields exhibit the same energy-momentum tensor as gravitational waves?

    I don't know if my question belongs to this forum but I get some troubles within my approach; what would you think of a theory predicting that some EM fields can exhibit the same (type of) energy-momentum tensor (emt) than the emt associated with some gravitational waves or fields ? Such...
  24. H

    RADAR - Radio Detection and RangingCan we use the same technique on

    RADAR - Radio Detection and Ranging . Can we use the same technique on a smaller scale :rolleyes: ? I mean to measure the relative velocity between two vehicles :smile: ? Are there any good sources on internet where I can get information in detail about the working of RADAR system...
  25. S

    Electron Detection spectroscopy

    In the electron detection using Silicon Detector ,Liquid nitrogen is used to cool the system . why is it used. What is "sweating" which is caused if the detector is not in vaccum,when kept in liq. nitogen Thanking you in advance. :smile:
  26. R

    Detecting Protons: What Detectors Are Used?

    Hi, I'm wondering how do we detect protons, and wat sort of detectors are used for this? Thanks
  27. R

    Detection of 10^-21 m Particles - Ray Veldkamp

    Hi, does anyone know of something of length of order 10^-21 m? I need it for an assignment to describe the detection of something of that length Regards Ray Veldkamp
  28. I

    Detection of subterranean water

    Water divining is the common method used to detect an underground source of water. This has no scientific basis. Are there purely scientific methods for detecting subterranean water?
  29. M

    Can we calculate the Schwarzschild radius of an object without knowing its mass?

    I've got a coursework to get done on the detection methods of black holes. So far I'm aware of gravitational lensing, x-ray detection and the accretion discs, and have just about finished my section on gravitational lensing. I'm wondering though if anyone has some (reliable) links or good...
  30. B

    Role of observer and detection in uncertainty principle

    I'm wondering if someone could tell me what would be the result of the following thought experiment, to help answer a simple question I have about the Heisenberg Uncertainty Principle: (I am just an educated layman trying to figure it all out- hopefully my thought experiment isn't complete...
  31. S

    Neutrino Detection: Uncovering Deuterium and Oxygen Reactions

    Hi, I have read some texts on the Internet on neutrino detection but I have some things I hope you can clarify.. When using heavy water (D20) for detection, the neutrino will interact with the deuterium nucleus producing a proton and an electron from the neutron. Now I have read that a...
  32. S

    Axial rotation of a magnetic field detection

    Since the archive didnt have an answer or these keywords, is there any way to detect a magnet spinning on its axis so the magnetic field is rotating axially and lines of flux are rotating around but nowhere in space is the flux level changing? I've heard rummors over the years. This is not the...
  33. T

    Detection of magnetic monopoles

    How would neutrons interact with magnetic monopoles?
  34. U

    Detection of Macroscopic Strings

    If I have heard correctly, models of the early universe predict the existence of macroscopic strings brought about by the enormous initial expansion of the universe. A way of proving string theory correct - among others - would be observing such macroscopic strings. My question lies with how one...
  35. I

    Endpoint Detection: Distinguishing Peaks from Noise

    Hi all, I am trying to write a code that can determine peaks in a signal. What I am doing is recording a signal then running an fft to calculate the fundamental frequency and the overtones (consonant and dissonant harmonics). The problem is that some of the peaks are very small but are always...
  36. A

    Build Your Own Cloud Chamber for Particle Detection

    [?] I'm thinking of building a simple cloud chamber in order to detect small particles such as muons, neutrinos, and the like. I have read some handbooks but I would be grateful if someone could lend me a hand by providing some instructions. I only have three months to prepare this so I need the...
  37. W

    How Many Campers Are Needed to Find the Correct Path?

    Hello, First I will post my question. I think it might be easier if I do this. Now I figure that the counsellor can take two of the four paths to determine if the campsite is down either of them. However, he still must depend on the campers to find out whether the remaining two paths...
  38. W

    How Many Questions to Determine Coin Positions with Permitted Lies?

    [SOLVED] Error Detection Hello, I have a question about error detection. Senario: One person can see two coins. Each coin could be laying heads up or tails up. You cannot see the coins. Question: What is the minimum number of questions with a "yes" or "no" response need to...
  39. D

    Gravitational quantum detection

    Greetings ! I remember posting a partially(I intend to add a different more profound example, if I get some feedback on this enitial message) similar thread here before called "gravitational double slit", but for some reason I couldn't find it. Anyway, basicly I was asking wheather...
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