Count Definition and 168 Threads

Count (feminine: countess) is a historical title of nobility in certain European countries, varying in relative status, generally of middling rank in the hierarchy of nobility. The etymologically related English term "county" denoted the land owned by a count. Equivalents of the rank of count exist or have existed in the nobility structures of some non-European countries, such as hakushaku during the Japanese Imperial era.

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  1. evinda

    MHB Checking the Efficiency of Function(int n) - Let's Count Key++ Executions!

    Hello! (Wave) I have the following function: Function(int n){ int key,j,k; for (j=2; j<=5n^3; j+=5){ for (k=j; k<=3n^(2/3); k+=3){ key++; } } } I want to find how many times the command key++ is executed. That's what I thought (Thinking) : The outer for...
  2. C

    5 count bag of balloons, 6 color possibilities

    We have a standard assortment of balloons which is 6 different colors. We also have a 5 count bag of balloons which uses this standard assortment. Obviously you can get all 6 colors in a 5 count bag but my colleagues were curious about the other distributions. The chances of only getting...
  3. R

    Gear Angular Velocity & Tooth Count

    Hi, If I put an 8 tooth on axle A and meshed a 12 tooth on axle B then I put a 16 tooth on axle A and meshed a 20 tooth on axle B but the 16 and 20 have the equivalent angular velocity/tooth profile will it rotate properly or will it jam due to the two gear sets going at different speeds...
  4. J

    If a irrational number be the basis of count

    In the comum sense, the number 10 is the base of the decimal system and is the more intuitive basis for make counts (certainly because the human being have 10 fingers). But, in the math, the number 10 is an horrible basis when compared with the constant e. You already thought if an irrational...
  5. marcus

    How many spacetime quanta are there? (depends how you count.)

    http://arxiv.org/abs/1404.1750 How many quanta are there in a quantum spacetime? Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli, Freddy P. Zen (Submitted on 7 Apr 2014) Following earlier insights by Livine and Terno, we develop a technique for describing quantum states of the...
  6. S

    Count the number of automorphisms in the graph

    Homework Statement I had a different problem before about this and I figured it out. I'd like to know if I'm doing this one correctly as well. Count the number of automorphisms in the graph. The graph is attached, now.The Attempt at a Solution I know I can rearrange the (a,m,b) 3! ways. I...
  7. twoski

    Operation Count for LU Decomposition

    Homework Statement Consider the n x n matrix A = diag[1,3,1] and vector x: (1,2,3) Determine the number of operations needed to compute the LU decomposition of this n x n matrix. The Attempt at a Solution So for a general n x n matrix, my prof's notes say that LU decomposition...
  8. C

    Relationship between radiation flux and count rate of a scintillator

    If the radiation flux is calculated as: F = \frac{L}{2*pi*r^{2}} where L is the luminosity of the source and r is the distance from the source and the count rate of a scintillator \frac{number-of-scintillations}{time} What is the relationship between them? There obviously should be one, as...
  9. K

    Geiger counter unaccounted jump in count rate

    I am in a lab class and we are currently measuring count rates for a specific source. Yesterday we ran a program that runs 3 second gate times on a CS-147 source with a voltage of 500v running through the detector, and a threshold of .5v on the counter. This 3 second gate time was to be repeated...
  10. M

    Schools Grad school for the PGRE challenged: How to make my research count?

    Hi guys and gals, first post here, but I've lurked here before but just now registering and posting I'm getting ready to apply for my graduate schools. I'm not sure what exactly I'm seeking, so I want to provide a little background. I've always been a tinkerer, ever since I was young I've...
  11. twoski

    Operation Count w/ LU Decomposition

    Homework Statement Fidn the total multiplications and divisions needed for the LU Decomp. of a general n x n matrix A, whose entries satisfy a_{ij} = 0 if j ≤ i - 2 Assume n=5. Also f ind the total multiplications and divisions needed for solving the lower triangular system Lg=f and for...
  12. S

    How to count all the orthogonal transformations?

    Homework Statement Find an orthogonal transformation ##\mathbb{R}^{3}\rightarrow \mathbb{R}^{3}## that map plane ##x+y+z=0## into ##x-y-2z=0## and vector ##v_{1}=(1,-1,0)## into ##(1,1,0)##. Count all of them! Homework Equations ##A_{S}=PA_{0}B^{-1}##The Attempt at a Solution So basis...
  13. fluidistic

    Fortran Fortran, is it possible to count the number of times a particular valu

    I have a data file with 21 values in it, which range from 2 to 10 by integers values. I would like to know whether it's possible to write a Fortran code to count the number of times a particular value (for instance "6") appear in the file. Let's call x_i the number of times the value i appears...
  14. M

    Count the probability of the event A that the first ball is red

    Homework Statement Let there be 2 boxes U1 and U2. Box U1 contains 3 red balls and 4 black balls. Box U2 contains 5 red balls and 3 black balls. We chose at random from one of the boxes: -If it's a red ball from U1 we put it in U2. -If it's a black ball from U1 we put 2 black balls in U2. -If...
  15. D

    How to count Spearman Rank order correlation

    Homework Statement calculate the rank order correlation between the following data: 6, 5, 4, 2, 3, 3, 8, 3, 7, 6, 7, 5, 5, 4, 2, 7, 6, 2, 4, 6 4, 3, 6, 7, 6, 7, 1, 9, 1, 2, 3, 4, 5, 5, 7, 1, 2, 9, 5, 4 Homework Equations Following the output from...
  16. V

    How Do You Calculate Radiation Count Rate for Different Energies?

    Homework Statement I've attached the problem sheet and my attempt at the problem. I've completed all the parts except for the last part, where I have to calculate the count rate of the radioactive source. The answers should be 6000 counts for 185MeV and 4650 counts for 1MeV. I'm not sure...
  17. O

    Nqueens problem, n will be input, output count of all possibles

    Hi, I'm writing a program for nqueens where inputs will be n and possibly a few existing queens already placed on the board. So far I've come up with one method, but got stuck on the second one. (hoping second method is more efficient) 1st method: - tabulate possible outcome of (n*n...
  18. M

    Calculus problem about population count

    Homework Statement Calculus question about tag and recapture? Here is the problem, i tried to do most of it but don't understand what its asking on c and d. Tag and recapture is used to estimate populations of animals in the wild. First, sample of animals are captured, number=n. They are...
  19. L

    Geiger Muller Tube time constant to correct for count rate loss.

    Hello All, I am playing with some questions in an old textbook I have been reading through and I am getting confused on this question regarding GM Tubes.The question that is stumping me goes like this: If a certain GM Tube has a time constant of 80msecs and procedures require that...
  20. R

    Schools My college won't count a course for my GPA

    Hey guys, I have a question. I recently did an English test and passed it, and because that exam, I'm exempted from taking the English course (which is compulsory for the degree), but I passed it with a B and I'm worried that it would count in my GPA. My college says it won't count on it, but...
  21. I

    What Is the Probability of Coincident Detection Between Two Particle Detectors?

    Coincindence Count Rates ! I have two particle detector, 1. one will counts 13 particle/sec 2. second has 0.138 particle/sec (i.e. 1 particle can be detected in 7.2 sec in second det) what will be the probability of both particle being detected ? and in how much time ?
  22. S

    Do employers count online 'open-source' classes that are completed?

    I was just checking out coursera and some others and noticed there many advanced classes available. If completed, how much weight would this carry in an interview or generally on a CV? Would this be considered fluff? Obviously, we are in a transitional period with traditional education...
  23. LarryS

    How To COUNT Information in Black Hole?

    I have not read any formal (mathematical) explanations of black hole thermodynamics, only popular literature on that subject. I have read that the total amount of information, and therefore its entropy, that a black hole can contain is proportional to the area of its event horizon (measured...
  24. W

    Chromosome Count Proves Evolution is Wrong

    I’m wondering if that is some kind of unscientific thinking masquerading as scientific thinking. Does the thinking appear to be scientific but is, in fact, faithless to science’s basic values and methods?This definition is indebted to Sagan, The Demon-Haunted World, p. 13. Because...
  25. I

    Schools How much does your PhD university count?

    Hi, I am a student in theoretical/fundamental physics that finished his masters couple of weeks ago. I'm still looking for a PhD starting asap. I am quite interested in an opened position at a UK top 10-15 university, the project seems interesting enough to invest 3 years in it. But I have...
  26. L

    Schools Graduate school Personal Statement length if word count not given?

    My word count right now is around 1200 words. Some applications say 1-2 pages, or "briefly describe x y and z" which my statement definitely falls into (slightly less than 2 pages). None of them explicitly give a word count, but I'm worried that I should still try to keep it under 1000 words...
  27. 7

    Mathematica Count from MatrixForm in mathematica

    Count from "MatrixForm" in mathematica! Hi every one, I really need help on this task.. how do I Count only the zeros elements from a MatrixForm in MATHEMATICA Suppose I have a Matrix 100X100 full with numbers and I just need to know how many zero is there on this matrix thanks
  28. M

    By Listing Them Randomly, Could we Count the Irrationals?

    So, I was thinking a lot about different ways to order the irrationals. Most of them had to do with infinite-dimensional row/columns, but nothing was really working (obviously - as if I'm going to prove Cantor wrong LOL). However, despite the clear history against me, I'm wondering if it's...
  29. P

    Would a toy car wheel count as a simple machine?

    Homework Statement I currently am confused about a, probably, simple problem >.< Back in primary school and middle school, my science teachers taught me that one of the simplest examples of a wheel and axle would the the wheels of a car (in this case a toy one), which made sense to me at the...
  30. K

    How to count the number of occurences of an integer in excel?

    Homework Statement I have a thousand random numbers generated between -100 and 100 and want to count the number of occurences of each integer. I know i can use the COUNTIF function, but for so many numbers it takes way too long. Is there a way to create a loop in excel that can do this or...
  31. K

    Counting Zeros in the Product of Natural Numbers up to 1962!

    Question- How many zeros are there in the product of all the natural numbers right from 1 to 1962 or in short in 1962! ? Attempt- Well, The product as a product of prime numbers, will denoted as - Let the product be N, N = 2a1 . 3a2 . 5a3 . ... pax As far as i see it we will have...
  32. W

    Mathematica Mathematica Calculating length from pixel count

    Hello. Does anyone know of a fast way of converting pixel count into a length metric (preferably using Mathematica)? I have an imaging program that segments and measures the lengths of objects in an image, but the only parameter that I can extract is pixel count, which then can get converted to...
  33. K

    Count to 20 with Fingers: Ideas & Tips

    I'm trying to find the most intuitive way to count to 20 using only the fingers of your hands. Right now my favorite is using 4 fingers on one hand to count groups of 5 from the other. Any other ideas? Please participate! :smile:
  34. C

    A way to count the uncountable Cantor Set.

    It's not that I discovered a way to count it or anything, but I think I have some confusion about it. I understand that Cantor set isn't countable and I accept the proof also. But, what if we count the elements of the set like the following? 1, 0, 1/3, 2/3, 1/9, 2/9, 7/9, 8/9, 1/27...
  35. E

    How do you count unique elements when multiplying integers from 1 to 1000?

    say you are multiplying integers from 1 to 1000 and you want to count the number of "unique" elements. How would you do that? Is there a closed form expression for that? counting the unique or non-unique elements is the same since we know the total number of elements and can get the unique or...
  36. S

    Logic gates, inverting output without increasing transistor count

    Homework Statement Hello all, I have the following logic gates: (A'.(B+C))' which I had reduced to A+B'.C'. I then want use a NAND gate connected to a NOR gate, then connected to an inverted. However, I have been informed that I need not to use ten transistors, and that 8 can get the job...
  37. T

    Mobile food van opening roof load count

    Hello, i need information who know or advise where i can to find literature, how to caltucalate this. 1. I need information how to caltucalte load (snow, wind and other forces) which can keep this roof, and 2. how to choose dampers which keef roof. Maybe anyone know how to calculate this...
  38. DaveC426913

    Why do pedestrian crossing signals count down but the traffic light stays green?

    Uh... what do I say now? Do I repeat it, like a dolt? Why do pedestrian crossing signals count down then the traffic light stays green?
  39. B

    Does the 0 vector not count when determining the dimension?

    Homework Statement If we have ker(T)={0}, why is the dim(ker(T)) = 0? Does the 0 vector not count when determining the dimension? I thought the answer would be 1.
  40. S

    Java How can I count the number of times a loop runs in Java?

    For my class I need to make a "Guessing Game" Program. Basically you just pick a number between 1-1000. It tells you if you are too high, too low, or correct. If your too high or low you guess again until you get it right. When you get it right it is supposed to tell you how many tries it took...
  41. G

    Efficient Equation for Counting Even Numbers from 1 to n

    Hi guys, I am noobie in number theory so if something exists better than this equation I did please don't bash me this is my first equation. Today I was thinking of a way to count all even from 1 to n,so this way I thought about is like this. Let me first write the equation,then I will...
  42. C

    How to use 555,2x 7490,2x 7447 to count 0 - 60?

    I can perform counting 0-99 but how do you stop it in 59 then 00 then back to 01? heres a sample
  43. K

    Hydrogen bonding and Oxygen electron count ? (how)

    Sorry to butt in on your form. Please can someone help me with this – I’m sure it’s simple to those who know but I have been thinking about these 2 problems for ages (and reading up on every website I can find) and still no answer. I am trying to get a basic understanding of this and seem to...
  44. D

    Working with an FPGA to Count Coidncident Pulses

    I am currently trying to program an FPGA to mimic a coincidence counting module. What I basically need it to do is a modified AND operation. The inputs are square, 5V pulses from photon counters. Because I am working with two photon counters (that are the same model) but due to imperfections in...
  45. H

    Count rates from X-ray Fluorescence Spectrum

    My question is, when extracting the count rate from a particular peak in the energy dispersive spectrum (e.g. X-ray fluorescence) Is this done by simply drawing a straight horizontal line from the top of the peak to the y-axis and the corresponding intercept will be the count rate? What if the...
  46. Simfish

    Is it ever appropriate to mention citation count for papers in your CV?

    Say, what if you were coauthor on a publication with > 100 citations? And if so, how would I mention it on the CV?
  47. H

    MATLAB Count size of matrix without size function in matlab

    I need to keep track of the size of the matrix myself. This means I can't use "size" function. Is it possible? For example, A is a 5 x 5 matrix. I need to create a vector x=[0,0,0,0,0]. It should be just x = zeros(size(A,1),1); %or length(A) but I need to check the size of A matrix...
  48. X

    How to count the total # of non-invertible 2x2 matrices

    Can anyone explain to me how to count the total # of non-invertible 2x2 matrices? I have the answer from the book, which is r^3+r^2-r provided r is a prime. But it doesn't explain how to get there, and I couldn't figure it out. I haven't been practicing linear algebra for quite a long...
  49. A

    Least Count of a Vernier Calliper

    I was reading some text about the vernier calliper and it was written that it's least count is equal to 1 Main Scale Division unit - 1 Vernier Scale Division Unit = Vernier Constant. Can someone explain how is the least count, that is the least distance that can be measured on the calliper...
  50. A

    Understanding Controlled & Count Controlled Loops

    greetings, what is the meaning of controlled loop and count controlled loop? advanced thanks.
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