What is the best CPU to buy for scientific computing?
Q. I plan on running code to compute numerical algorithms and also some Neural Networks. I want to know which processor would be the best for doing this. I am also considering to set up a Linux cluster to speed up my processing needs. So far I am trying to make my code more efficient, but I really need some raw power to get my programs to finish faster.
Asked by nicholasdewaal - Tue Mar 3 04:57:27 2009 - - 2 Answers - 0 Comments

A. I take it that you need a lot of processing power? Are you building a new computer or just upgrading? Any of the new Intel i7 Quad core processor chips are mental quick, but they come at a price. A cheaper option would be a Intel Q9550. using a 64bit OS with 4gb of ram should see you through it.
Answered by James B - Tue Mar 3 06:44:54 2009

would a masters degree in scientific computing get me a decent job?
Q. I like maths.. i like programming.. and i like merging the two i saw this program offered by courant institute of mathematics. my question is.. would this get me a decent paying job?
Asked by chicken guy - Wed Jan 30 10:06:30 2008 - - 1 Answers - 0 Comments

How do u compute a definite integral in a scientific calculator? or just in general?
Q. For example in my calculus book, it has Present Value= Definite integral sign from 20 to 0 1000e^-0.06t dt =$11647. I have no idea how to get make that problrm equal that
Asked by Joseph V - Thu Aug 9 09:11:50 2007 - - 4 Answers - 0 Comments

A. 1000e^-.06t The integral of 1000e^-.06t is [-5000* e^(-.06*x)] / 3 So plug in 20 for x, then 0 for x and subtract the two ( [-5000* e^(-.06*20)] / 3) - ( [-5000* e^(-0.06*0)] / 3) -5019.90 - ( -1666.67) =11647.77
Answered by Je Lebowski - Thu Aug 9 09:19:19 2007

What type of scientific calculations can be speeded up using High Performance Compute Clusters?
Q. I am looking for basic types of calculations as well as specific exmples.
Asked by craissla - Thu Sep 7 06:04:10 2006 - - 2 Answers - 0 Comments

A. High Performance Computing Clusters High Performance Computing Cluster (HPCC) combines multiple Symmetric Multi-Processor (SMP) computer systems together with high-speed interconnects to achieve the raw-computing power of classic "big-iron" supercomputers. HPCC have been widely used for solving problems from high-end, floating-point intensive scientific and engineering problems to commercial data-intensive tasks. User employment of these applications include: - Seismic analysis for oil exploration - Aerodynamic simulation for motor and Aircraft design - Molecular modeling for biomedical research - Data mining or finance modeling for business analysis - Space Data and Information Sciences
Answered by ideaquest - Thu Sep 7 06:18:44 2006

What is the coefficient of x^55 * y^45 in the fully expanded form of (2x+3y)^100?
Q. This is part a of a question from my computer science 204 Scientific computing class. part b: what is the coefficient of x^44 * y^10 * z^3 in the fully expanded version of (bx^3 + 3y + 2z) sorry the second part was (bx^2 +3y+2z)^35
Asked by Adam S - Sat Feb 7 15:22:17 2009 - - 1 Answers - 1 Comments

A. Updated due to new information: x^55 y^45 will appear in the product: (2x + 3y)^100 But a "helpful" way to write that product is: (2x + 3y) (2x + 3y ) (2x + 3y) ... (2x + 3y) (2x + 3y) There are 100 factors, so the number of possible ways to pick 55 of them to be 2x and the other 45 to be 3y will be 100 choose 55. From there, you simply write it out: (100 C 55) (2x)^55 (3y)^45 The coefficient is: (100 C 55) 2^55 3^45 There is NO reason to write this as an actual number, but if you want to, try your calculator. It will probably not give you an answer. But here it is: 6 540 595 728 226 340 437 614 310 628 805 471 547 362 452 921 789 823 735 978 566 615 040 --- --- --- --- --- --- --- --- For the second question, same idea, you… [cont.]
Answered by cheeser1 - Sat Feb 7 15:29:27 2009

another question on chord length what numbers do I input in the scientific calc to find the chord on a radius?
Q. I have given radius 282'-5" and a given degree 2.667 now with my calculator in hand what numbers do I input and what keystrokes do I perform in what order to compute the chord length of this arc Its been a long time since math class I just need a reminder Please thanks for your help
Asked by moose - Sat Mar 15 08:20:39 2008 - - 1 Answers - 0 Comments

A. Chord length = 2 r sin ( /2) = 2 * (282x12 + 5) * sin (2.667/2 ) inches = 6778 * (0.02327) = 157.74 inches = 13'2" (nearly)
Answered by Madhukar Daftary - Sat Mar 15 08:38:04 2008

Has anyone done AS level Computing Module 1 and can you tell me whether i would b allowed to use a calculator?
Q. It's just i have my exam coming up and want to no whether i would be allowed to take a regular scientific calculator into the exam!
Asked by brienna - Sun Jan 14 13:04:26 2007 - - 1 Answers - 0 Comments

A. I didn't do AS Level Computing but I did do the Scottish equivalent and we were allowed to take a calculator into the exam with us if we wanted. They might check that it's got no markings on it that might be wee cheat notes but I don't see why you wouldn't be allowed.
Answered by cosmic_quest - Sun Jan 14 14:16:23 2007

What two colleges host the NSF programs in 1997? What were there locations?
Q. They program interconnected 50 university and scientific computing sites.
Asked by Ian - Fri Sep 18 11:12:51 2009 - - 1 Answers - 0 Comments

A. macalester college bryn mawr
Answered by mel - Tue Sep 22 09:54:57 2009

What two colleges host the (NSF) programs in 1997?
Q. Two National Science Foundations (NSF) programs were established in 1997 to interconnect 50 university and scientific computing site. What colleges host these two sites
Asked by friday - Mon Aug 27 15:15:15 2007 - - 1 Answers - 0 Comments

A. The names of the two programs spearheaded by the National Science Foundation in 1997 are: 1.)National Computational Science Alliance (or ALLIANCE, for brevity)- which is hosted at the National Center for Supercomputing Applications (NCSA) in Urbana, Illinois. 2.)National Partnership for Advanced Computational Infrastructure (NPACI)-hosted by the San Diego Supercomputer Center at the University of California at San Diego.
Answered by Noxtemp - Wed Aug 29 23:20:20 2007

Should I calculate the means and standard deviations in a correlation study?
Q. I am in a test and measurements class and need help. I have conducted a test to see if there is a correlation between job satisifaction and agreeableness. I have computed the Pearson product moment correlation and my obtained value (r) = .745, my cv is .532. I have to write a scientific report analysis on this, should I calculate the means and standard deviations for each response set?
Asked by matt - Sat Feb 2 14:31:47 2008 - - 1 Answers - 0 Comments

A. The PMCC is a good measure for correlation, there are other measures about that you might want to investigate. It might be nice to find a regression line for your data so you can display a trend line graphically and predicut some values. Beware though as these assume that it is a linear relationship (which in this case it most probably is). Calculating means and standard deviations may be required to obtain values for your tests but the mean and standard deviation themselves won't tell you much in analysing correlation.
Answered by cyclogames - Sun Feb 3 09:17:00 2008

Can you help me find a general purpose distributed computing platform?
Q. All of the distributed computing platforms I have found either distribute entire processes to separate machines or require you to specifically instruct the master machine on which processes should be distributed to which machines. I am looking for a platform that will distribute processing transparently and automatically dynamically allocate resources amongst the nodes as needed. There are two problems here. With the first scenario all of the work of an entire process lies with one machine in the cluster, which sucks if you have a cluster of different platforms. This means one process might be allocated to a Pentium II and take weeks to complete while a process that could run just fine in a few minutes on the Pentium II goes to a quad… [cont.]
Asked by Josh - Tue Sep 23 16:56:11 2008 - - 1 Answers - 0 Comments

How do you compute the actual age of a matured catfish caught from the river?
Q. Based on scientific research of fishery experts, how do they tell the actual age of a fish?
Asked by Josepablo - Tue May 23 09:55:09 2006 - - 3 Answers - 0 Comments

A. You can use the scales to calculate the age of the fish. If you look at a scale with a strong magnifying glass in good light, you count the darker lines ( these are called annuli) their is one of these lines for each year, it is the same as counting the rings on a tree. This technique is useful especially if you dont want to kill the fish. If you want to try another technique you can use the otoliths but this involves fine dissection and scientific knowledge.
Answered by Kev - Tue May 23 10:58:03 2006

How to compute the complexity of a graph? Which scientific field (other than maths) works with such measures?
Q. I've got some graphs and have to compare them. I want to be able to make statements like "Graph X is more complex than Graph Y". The graphs are of different classes. Some are bipartite, others are not; some are directed, others are mixed. I even have graphs with different kinds of edges. There sure must be some measure for the complexity of a graph - based on the amount of vertices and edges maybe, or on the amount of vertices from which other vertices are reachable in a few steps... but I don't know where to look for such measures. I scanned the content pages of some books on graph theory, but I didn't find anything like that, and besides, the contents of those books would be too difficult for me as I didn't have much maths at the… [cont.]
Asked by Rumtscho - Tue Jun 24 15:50:59 2008 - - 3 Answers - 0 Comments

A. This is graph theory, pure and simple. Unfortunately, "complexity" isn't an inherent attribute of a graph. At best, it's the amount of work needed to accomplish something with the graph (such as the time to construct a minimal spanning tree); at worst, it's just in the eye of the beholder. There are actually many measures of complexity. Just a google of "graph complexity" and "complexity of a graph" will get you a whole bunch of papers. But before you do that, YOU need to define what YOU mean by "complexity." If you can't define it in lay terms, you can't determine which algorithm might best measure it.
Answered by Blah - Tue Jun 24 16:50:15 2008

Two NSF programs?
Q. Two National Science Foundations (NSF) programs were established in 1957 to interconnect 50 university and scientific computing sites. What colleges host these two sites?
Asked by friday - Mon Aug 27 00:23:28 2007 - - 1 Answers - 0 Comments

A.
Answered by narsimha l - Mon Aug 27 09:26:19 2007

Going to Japan with Ph.D?
Q. I am a computer science/mathematics major planning on doing my Ph.D is scientific computing. For anyone who doesn't know, that involves things like simulating physics inside of computers. What is the feasibility of going to Japan, at least long enough to see if really want to move there? Are there lots of scientific computing jobs in Japan? I am currently working for a CFD company with a branch in Japan, but I haven't had much contact with that branch. I'm also not sure if they only deal with customers or actual development. Or where can I find information about what kind of jobs are available? Also, are there any US schools with good computer science programs which offer taking a semester (or two) trip to Japan for classes (or… [cont.]
Asked by nemahknatut88 - Sun Sep 27 21:29:15 2009 - - 1 Answers - 0 Comments

A. You can probably get into a japanese university for grad school in a technical field, a few people i know have accomplished this without having anywhere near a full grasp of the language at the time of their application (friends from America, and one of my Chinese friends in Shanghai). They go there and were/are taking intensive japanese language courses (including technical japanese language), working in the lab and easing into subject related courses. Sure, there should be some schools in the US that will let you have a semester or two abroad. I go to Univ. of Wisconsin - Madison, we have a strong partnership with Tokyo University for instance. Graduate students and faculty at least come to and from Tokyo once a year for a duration… [cont.]
Answered by Bent Snowman - Sun Sep 27 23:24:53 2009

How do I under-clock (throttle) the memory on my video card?
Q. I just bought an Nvidia Geforce 260 video card that comes with ddr3 memory. The memory on the card is too fast for what I want and so I want to slow it down. How do I do it? Note: The reason for slowing down the memory speed is because of memory errors. When doing scientific computing with CUDA, memory errors are not acceptable and can ruin a computation, whereas in gaming it doesn't matter if you flip a bit here or there. NVIDIA doesn't have ECC memory in their cards, and so I need to throttle the speeds to decrease bit flips.
Asked by nicholasdewaal - Tue Mar 10 23:26:13 2009 - - 3 Answers - 0 Comments

A. The easiest would be to use some type of software overclocking utility like Rivatuner, Powerstrip or Nvidias Ntune. These programs also allow you to underclock the memory and GPU frequencies. There is no BIOS option that would allow you to edit GPU settings.
Answered by Bjorn - Tue Mar 10 23:34:34 2009

Scientific notation: approximately how may seconds are there in 2000 years? assume 365 days/ year... HELP!?
Q. how to compute for this? thanks so much in advance!
Asked by kelley - Thu Oct 2 06:45:52 2008 - - 8 Answers - 0 Comments

Scientific equations?
Q. What are the equations I need to use to be able to solve these questions? 1. Convert the speed of 25 knots to it's equivalent in statute miles-per-hour. 2. Find the reduction in volume of a piece of wood measuring 5"x5"x5" at sea level as a result of being submerged to a depth of 3,000 feet. 3. If the sedimentation process occurs at the suggested rate of 2 cm/1,000 years, how old would you compute a layer of sediment to be which measures an average 2,000 meters thick?
Asked by Linda H - Wed Apr 16 18:02:59 2008 - - 1 Answers - 0 Comments

A. I'll start... 1. 1 knot is 1 nautical mile per hour,,, 2000 yds in an hour A statute mile is 1760 yds So 25 kts = 25 *2000/1760 mph=5000/176mph 2. Con question Pressure on wood = Height*density But we don't know how compressive the wood is... 3. 2000m thick 2 cm in 1000 years 1m in 5000 years 2000m in 2000*5000 = 1000 =10^8
Answered by ANDREW K - Wed Apr 16 18:21:00 2008

Muslim's Holy Book The Noble Quran contain scientific facts?
Q. The Holy Quran contains such scientice facts which were reaveled to Muhammad 14000 years ago have amazed me! The sun and the moon follow courses (exactly) computed; [ Surah Al Rahman ] Isnt it a miracle enough to understand that There is no God but Allah and Muhammad is the Messenger of Allah? Sorry its 1400 years not 14000 years.
Asked by Acid - Sat May 5 09:38:14 2007 - - 12 Answers - 0 Comments

A. No. This does not prove anything. Sorry, nice try.
Answered by Southern Apostolic - Sat May 5 09:53:50 2007

could people percieve colors in different ways?
Q. I ve always wondered if it is possible that everyone might perceive colors in a different way. That is, we are all taught as a child that when we see a certain shade or hue, it s called red. But what if, when I look at an apple and see what I know as red, it looks like what you consider blue. So if we both closed our eyes, pictured the apple, and our minds could somehow swap images... yours might appear purple to me. While the object is reflecting the same pigments, maybe each individual s eyes or brain compute them in different ways? Can anyone give evidence for why this is or isn t plausible? Sorry if it sounds crazy, just wondering. =] (i'd be just as happy to hear opinions as scientific explanations. there's no wrong answer, i… [cont.]
Asked by alaina - Thu Jan 11 19:37:06 2007 - - 21 Answers - 0 Comments

A. Colors are perceived by the brain, and not by the eyes. If one person's brain perceived a color different, then it's entire possible that an apple could appear in their mind as what someone else would interpret as blue. However, there is no way for a person to describe what they see as color except as "red as an apple" or "red as a firetruck." This doesn't tell you what the color actually looks like in their head. It only confirms that they've been taught to name the color that appears in their mind when they see an apple as "red." As I said, the mind translates color, not the eyes. The eyes can only capture the image and transfer it to the brain. Because of this, we can never truly define how a person's mind interprets colors,… [cont.]
Answered by baka_otaku30 - Thu Jan 11 20:11:08 2007