Reading Definition and 614 Threads

Is it just me? But reading a lot of maths stuff makes me hungry, it's a good thing that I exercise regularly.

Hi there, I am trying to read a universal file (*.unv) in fortran. The file is type 58b (mixed ascii and binary format). I can read the ascii part fine but am having trouble reading the binary part. Does anyone know of anywhere I can access some source code to read this correctly. I suspect...

I was reading Weinberg's book Cosmology. When I went to chapter 2, under the subsection 2.1 "Expectations and discovery of the microwave background" I could not understand one statement. ---Quote--- The work done by pressure in an expanding fluid uses heat energy drawn from the fluid. The...

Hi guys, I'm doing a quantitative finance research project that is based on the following papers: "Systemic Risk and Sovereign Debt in the Euro Area" - Deyan Radev (can be downloaded here: Systemic Risk and Sovereign Debt in the Euro Area by Deyan Radev :: SSRN) and "Consistent Information...

This may sound weird if you can't relate. So I managed to squeak through my entire undergrad career and get accepted to a "top 10" PhD program without ever actually reading a Physics textbook cover to cover. I basically just cherry-picked the topics I needed to do problems sets and skipped...

Hi! I have trouble understanding this: Given Temperature: If pressure < saturation pressure => Overheated Vapor If pressure > saturation pressure =>Compressed Liquid Why does this happen?? Thanks in advance!

How to calculate instantaneous speed from a speed - time graph?

I'm trying to figure out a bit of a http://www.ck-components.com/tpc/navigation,10475,en.html. Data sheet is in the Literature box marked "Download TPC catalog pages". The electrical sketch on page two is what's confusing me. How would I read this switch to figure out what its state is? This...

Guys. I really need help. I have been working in this little problem for hours. I had a problem in array reading when I opened more than 1 files, it seems like an array with different names mixed each other. Here is my code integer, parameter::size=11 real, dimension(101) :: cldata...

Homework Statement A cup of water has weight X. A stone has weight Y in the air is immersed fully in the cup and it displaces water of weight Z. What will be the new reading on the balance after the stone is immersed inside the cup? Homework Equations The Attempt at a Solution My...

Alright. So, internet gives me the idea that any serious research in Theoretical Physics will require me to have atleast some knowledge of the following topics in math: Topology Groups (Group Theory) Differential Geometry Calculus of Variations Linear Algebra Abstract Algebra I was...

Calling math history geeks -- any reading suggestions? Hey everyone! Inquiring minds (well, at least one) want to know: what are some good books on math from a historical perspective? I recently acquired "Mathematics of Nonmathematicians" (Dover Books) as the reviews suggested it was mostly...

as title.. are there any books with recent info re. current thinking about space/time..origin, structure etc... cheers

Howdy, I came across a regular expression i couldn't get my head around. ' there \([^ ]*\)' echo "Howdy there neighbor" | sed 's/there \([^ ]*\)//' returns howdy. It's the subgroup that's a bit confusing. match any sentence which contains banana then a space and then a non-space character...

Hey, I was reading Neil Turok's book (The Universe Within) and it got me thinking about E=mc^2. Here's what I came up with (keep an open mind):

How do I read such a chart? http://www.showa-denko.com/fileadmin/template/img/SCMG_discharge_characteristic.png It looks to me from this chart that available capacity increases while voltage decreases, but it is not what I see on my batteries: the more I use them, the lower their voltage...

Homework Statement Write a program in nasm which will read through a 5x5 matrix and print the largest value.The Attempt at a Solution I ran this through a debugger and for some reason $edi reaches 19 and sets $esi to 0. Which is weird since the value at [eax + edi * 4] should be 4, not 0. My...

hi dears I have a txt file as follows: " x1 Xi x2 x-EN y-EN EA EB ma gnetic ------------------------------------------------------&------------ .0010 -.9990 .7322 .4042 -.3280 -.0002 -.3279 .0010 .0010...

I am using An Introduction to numerical linear algebra by Charles Cullen and I'm not very satisfied with it. Kindly suggest me some alternatives. Also suggest good linear algebra book to clear up basics. finally also suggest any online study materials, lecture notes, videos regarding the...

Hi all, long time lurker: finally have a question I couldn't find already answered. I'm doing some work with Fortran95 for a research project, and I'm a complete noob, so pardon me. The issue is that I have some data I'd like to read from a text file in double precision that is between 7 and...

Hey guys so i did a tensile test lab and got the following results from the strain gage: SecondsElapsed Strain u 0.1 0 1.1 1 2.1 1 3.1 0 4.1 0 5.1 1 6.1 1 7.1 2 8.1 5 9.1 9 10.1 47 11.1 129 12.1 209 13.1 278 14.1 335 15.1 386 16.1 434 17.1 482 18.1 529 19.1 579...

Hi all, I have attached my text file(tab delimited). I am planning to read those dataset into real array of (30,38). The dataset has variable decimal places like 312.66, 0, 535.696 ,456122.758. With the following codes, READ(12,*)((X(I,J),I=1,30),J=1,38)...

Hello, Am writing java, using netbeans, For what should be a simple try.. catch with a while loop, I am getting the error. i have an excel file with the strings i want to display. the file is all fine, checked to make sure no empty cells etc etc. When i get to the second last element, the...

I am trying to read from a csv file, the file looks like below: 1,2,3 4,5,6 7,8,9 0 I used getline(Input_file,size,',') but the problem with this is that it seems to see the numbers not separated by commas as one string., for the code below i was expecting the following output: 1...

hi. I have a csv file name Relative which has 24 different data set containing characters as well as numbers. It looks like Date,Hour,Min (RH),Max (RH),Avg (RH) 2012-08-28,0,85.190,87.200,86.325 2012-08-28,1,85.390,88.570,86.775 With reference to one of the thread reply in this forum...

I have been reading a book on hyperspace and again the author has gone back over EINSTEIN,s space gravity thing. And i have this problem that reoccur,s everytime this happens which is many times over many years and its this. All the authors seem to be saying that when a planet gets to the...

Hello all. This circuit diagram uses empty and full circles and also no circles. Is there a difference between a white circle in this diagram and a black one? I'm referring to the typical application diagram. http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXqwvzw.pdf...

I am fairly new to quantum physics, I don't know much more than the double slit experiment and schrodinger's cat paradox. Can anyone tell me what would be a good subject to read about to be able to "understand" quantum physics? Superposition? Entanglement? Also, if anyone has any good...

Hi, I'm looking for some additional reading material while preparing for an E&M course. I'm going through Jackson and Griffiths, and I'd like to read a few scientific papers that will be good "E&M exercises." Anybody have papers in mind? Any suggestions for an intro to plasma containment?

Hey physicsforums, Normally I enjoy reading texts that explain or elaborate on scientific phenomena. Also, normally, these texts take me awhile to read, but I just found out that I can read fiction works A LOT faster than books where I'm legitimately learning something scientific. Is...

I was just curious if anyone could point me in a direction on how to read transformers that are not industrial transformers? I ask this because I'm new to the field of electronics and I found an old transformer from my grandfather and the only information written on it is PT-54-A next line...

Hi all, I'm upgrading a legacy f77 code to f90 standards. I'm trying to make some of the global arrays as dynamic arrays so that at a later stage it would be easier for me to parallelize whole application. Coming to my problem, I need to read some numbers from a text file so that I can...

I am working on trying to get a .bin file from a flash memory module. Am29BL802C I have attached a picture of the chip I am working with, the datasheet, and the pinout of said chip here --> http://forums.hackaday.com/viewtopic.ph ... 994#p10994 I need this file in order to reverse engineer...

I have a .txt file with 100,000 integers from 1-100,000, with each integer in a newline. I am facing a problem in using the fgets function. How do I read the integers into an array? #include <stdio.h> //Program to count number of inversions in an input file of integers using Brute force...

Which textbooks/books are you guys working through this summer?! I am working through: Analysis - Spivak Classical Mechanics - Morin Game Theory - Binmore Linear Algebra - Poole Molecular Biology of the Cell - Alberts. As of now, For Analysis, I am exploring definitions of...

Hello, I'm trying to run a simulation program, written in Fortran 77 for the g77 compiler ( I use gcc version 3.4.6). I get the following error message when running the program: invalid number: incomprehensible list input apparent state: unit 3 named combin.fig last format: list io...

Hello, I have a table here which describes the structure of a certain compound, but I'm unsure how exactly to read it. Unit Cell 5.940(3) 5.940(3) 5.940(3) 90.0 90.0 90.0 Vol 209.58 Z 4 Space Group P a -3 SG Number 205 Cryst Sys cubic Pearson cP12 Wyckoff...

Hey, I know this is a long shot, but is anybody else on here involved in the AP Physics Reading? I am, and am wondering if anybody would want to meet up.

Hi, So I can read from a file by doing: while read line; do ... done<$fileame Is it possible to change to reading from stdin instead of that file by changing the $filename variable instead of writing a new loop without a done< argument? Thanks.

Hi everybody, I need your help guys. I am using FORTRAN 90(or 95) and try to read a text file. The file contains many lines for instance something like this CS DIRECT 1.2 2.5 3.6 1.6 -2.3 2.9 .... .... .... I need to put each line inside a string variable for example A="CS"...

Lately, I have been experiencing a sort of anxiety over not understanding some of these proofs in my calculus textbook. I just finished a calculus I course, and we did not spend any time learning them; so, I thought, since it is summer time now, I would go back over and try to learn those...

Homework Statement I'm reading through Jackson and ran into the following: An application of Gauss's theorem to ∇'^{2}G=-4πδ(x-x') shows that \oint(\partialG/\partialn')da'= -4∏ where G is a Green function given by 1/|x-x'| + F, and F is a function whose Laplacian is zero. (Sec. 1.10...

Im working my way through a thesis paper that has a lot to do with this. I have a strong background in linear algebra which I've noticed is important as the determinant of the covariance matrix comes up a lot in density functions. Other than the linear algebra though, I've only taken an...

printf("\nSpecify ascending ['a'] or descending 'd' >> ");scanf("%c",&pref);flushInputBuffer(); extract_array(s,n,crit,array1);extract_array(s,n,2,array2); if (pref == '\n')pref = 'a'; printf("\n%c\n",pref); So the above is a snippet of code from one of the programs I am writing. My...

Hello. I've just gotten through my first year of undergraduate physics (not much physics really) and won't have the time to take any courses over the summer. I think it'd be in my best interest to keep my mind on my studies so I figure I will pick up a few books to go through over the summer...

Hey people, I believe this would be a good way to find out new(probably good :-p) books, so just as it says on the tin, what are you reading now? I currently alternate between Simon Singh's Fermat's Last Theorem, and Towers of Midnight by Robert Jordan. Nearly finished both so I can surely...

I'd like to create some test data to read 2-dim arrays in f90 with namelists. Suppose I have this in the main program: integer, dimension(2,3) array_in, array_out namelist /WW_ARRAY/ array_in, array_out ... Open(unit=WW_ARRAY_infile, file="WW_ARRAY_in.dat", status =...

Many of us, probably most, know Smoot and Mather got the 2006 Nobel "for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation." But there is more to the story, other scientists other instruments other features of the early universe discovered in the...

The library sent out a survey today asking about e-books to the entire university. Now I know it is bound to happen where there will no longer be physical books anymore, but personally I can not stand reading e-books. I absolutely hate when you have to scroll back and forth between pages to...

Homework Statement I'm trying to read a string from cin. When it hits the "cin >> strWord" statement, I get the following error message: Segementation fault (core dumped). The input file is named "data4nine". I'm really not sure what a segmentation fault is and why I'm getting it The...