What is Distributed: Definition and 225 Discussions

Distributed computing is a field of computer science that studies distributed systems. A distributed system is a system whose components are located on different networked computers, which communicate and coordinate their actions by passing messages to one another from any system. The components interact with one another in order to achieve a common goal. Three significant characteristics of distributed systems are: concurrency of components, lack of a global clock, and independent failure of components. Examples of distributed systems vary from SOA-based systems to massively multiplayer online games to peer-to-peer applications.
A computer program that runs within a distributed system is called a distributed program (and distributed programming is the process of writing such programs). There are many different types of implementations for the message passing mechanism, including pure HTTP, RPC-like connectors and message queues.Distributed computing also refers to the use of distributed systems to solve computational problems. In distributed computing, a problem is divided into many tasks, each of which is solved by one or more computers, which communicate with each other via message passing.

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  1. M

    Model parameter distributions from Gamma distributed data

    I have a set of data points {xi,yi} where each yi is a Gamma distributed variable where both the shape k and scale \theta depend on i. I then fit the data points with a power law model y=a(x)b. I would like to know the probability distributions for the fit parameters a and b. Is...
  2. R

    Relation between exponentially distributed random variables and Poisson(1)

    Hi, Suppose X_1, X_2,\cdots be an independent and identically distributed sequence of exponentially distributed random variables with parameter 1. Now Let N_n:=\#\{1\leq k\leq n:X_k\geq \log(n)\} I was told that N_n\xrightarrow{\mathcal{D}}Y where Y\sim Poisson(1). Could anyone give...
  3. V

    Statistics proof, identically distributed RVs and variance

    Homework Statement Show that for identically distributed, but not necessarily independent random variables with positive pairwise correlation ρ, the variance of their average is ρσ^2 + (1-ρ)σ^2/B. ρ - pairwise corellation σ^2 - variance of each variable B - number of samples...
  4. S

    How is Velocity Distributed over 11 Dimensions?

    According to M-Theory there are 11 dimensions including time. 10 of these dimensions are spatial, so objects can move and therefore have velocity? Correct? According to Einstein's General Relativity whenever an object is not in motion in the three spatial dimensions, velocity is conserved...
  5. E

    Work done by a distributed force on a string

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  6. A

    Distributed load - model bridge project

    Homework Statement check out: so this is for a bridge project right and that picture is simply a basic design just enough to get the jist to answer my question. what I am wondering is, if 20kg's was applied to the very centre of that loading plate - is it fair to say that each of the long...
  7. A

    Calculating Maximum Distributed Load on Beam Using Failure Theories

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  8. O

    Sum of Identically Distributed Independent Random Variables

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  9. H

    Calculating Distributed Capacitance of a Bifilar Coil?

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  10. R

    Why is dark matter distributed in a web rather than falling into clumps ?

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  11. E

    Charge Q is distributed uniformly over a thin rod

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  12. P

    Formula for a non-uniform distributed load on a flat plate

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  13. S

    Distribution of Sum of F distributed rv?

    Dear Good people, I needed a help, what will be the distribution of sum of n F distributed random variables? what will be the distribution of sum of n non-central F distributed random variables? Great if u can suggest some references too! Thanks in advance!
  14. T

    X is normally distributed and the mean of X

    Question: X is normally distributed and the mean of X is 12 and standard deviation is 4 Find i)P(0<=X<=12) Solution P(X=12) = Z(12-12/4) =0 Stuck here! what to do next
  15. S

    Statics - Distributed Load Over Beam

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  16. H

    How are the Real Numbers distributed?

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  17. T

    Let X be uniformly distributed on (0,1)

    Question: Let X be uniformly distributed on (0,1). Show that Y=- \lambda-1 1n(1-X) has an exponential distribution with parameter \lambda>0
  18. C

    Finding the Mean/Median of a Normally Distributed Curve

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  19. K

    Average Length of Life of Two Exponentially Distributed Components

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  20. F

    Normally Distributed Data

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  21. L

    Can Z and U be considered independent in this scenario?

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  22. E

    Conditional expectation of three exponential distributed r.v.

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  23. L

    Exploring Distributed Element Models: A Guide for Circuit Designers

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  24. M

    How To Calculate Range of Values Of A Random Variable (Binomially Distributed)

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  25. G

    Prove a variable is uniformly distributed

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  26. L

    Subtraction of normal distributed stochastic variables

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  27. W

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  28. N

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  29. O

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  30. G

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  31. A

    Are galaxies fairly evenly distributed?

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  32. A

    Solving Distributed Load Homework: Reaction Forces at A and B

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  33. D

    Meaning of Independent Identically distributed random variables

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  34. J

    Why is this highly distributed array a bad idea?

    I once ran into a nobel-winning astronomer at a conference and suggested to him putting small internet-controlled telescopes for free (and fully supported) on a the roof of any household that wanted one. The telescopes would be controlled by "The Project" from a central server, and the "owner"...
  35. T

    Does a Distributed Mass Pendulum Stay Straight When Released from a Right Angle?

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  36. R

    Probability of Light Bulb Lifespan: Normal Distribution with Mean 400 Days

    The life of a light bulb manufactured by a company is found to be normally distributed. if the bulbs last 400 days with a standard deviation of 75 days, what is the probability that a randomly chosen light bulb lasts? a) at least 450 days? b) less than 150 days? etc. Throughout the...
  37. P

    Difference Bet. Clustered and Distributed systems?

    Hi! What the difference between Clustered systems and Distributed systems? Can any help in a few lines? Thanks.
  38. M

    Electric charge equally distributed in rice grains

    Homework Statement How many rice grains are needed for an electric charge of a certain strength (I don't remember the value now but is it really relevant?) to be equally distributed amongst them? Homework Equations I hope you can answer that :) The Attempt at a Solution I can...
  39. R

    Summation of geometric number of iid exponentially distributed random variables

    Hello, I am having difficulty approaching this problem: Assume that K, Z_1, Z_2, ... are independent. Let K be geometrically distributed with parameter success = p, failure = q. P(K = k) = q^(k-1) * p , k >= 1 Let Z_1, Z_2, ... be iid exponentially distributed random variables with...
  40. C

    Why does the charge uniformly distributed on the surface of the sphere only?

    1. A solid conducting sphere is given a positive charge Q. Why is the charge uniformly distributed on the surface of the sphere only? Homework Equations 3. I know there are electron clous where electrons hang out, but what happen when the sphere is given a postive charge? I don't...
  41. S

    Sums of Independent (but not identically distributed) Random Variables

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  42. S

    Sine of Uniformly Distributed Random Variable

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  43. E

    X and Y identically distributed implies E(X) = E(Y) and var(X) = var(Y)

    Homework Statement Let (S, \Sigma, P) be a probability space. Let X and Y be two random variables on S that satisfy P \circ X^{-1} = P \circ Y^{-1} (i.e. they are identically distributed) and such that E(X), E(Y), var(X) and var(Y) exist and are finite. Prove that E(X) = E(Y) and var(X) =...
  44. J

    Beam resting on wide supports with a distributed load

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  45. R

    Uniformly distributed electric field lines

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  46. S

    Uniformly Distributed Sequence

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  47. P

    How is force distributed orthogonally along a material plane?

    Hello, I want to simulate a plane thin rectangular board attached to one spring below at each end. (So there are 2 springs in total.) The springs span the entire edges. The spring-board-attachment is a rotatable axis. I can't find out how the force acts on the springs. I don't know whether...
  48. B

    Probability of normally distributed life lengths

    Homework Statement A standard light bulb is claimed to have a lifelength of 8000 hours with standard deviation of 800 hours. A newly designed light bulb is claimed to have a life length of 9200 hours with a standard deviation of 600 hours Homework Equations If 36 standard and 36 newly...
  49. Topher925

    Distributed Computing, what projects do you belong to?

    Does anyone else here do distributed computing? I have my PCs running World Community Grid and work on the Clean Energy Project. Does anyone else participate?
  50. E

    Understanding Gamma Distributed RV: Finding Shape and Scale Parameters

    Hello, When writting a gamma distributed RV we need to know the shape and scale parameters. How to find the value of these parameters? Thanks in advance
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