List Definition and 494 Threads

Hi, All: I have a Windows 7 Pentium system with IE--pretty close to the latest update. My list of favorite Internet sites is pretty large; easily more than 60 items. Sadly, my system has crashed a few times over the last 2-3 years, and I have lost the list each time when reinstalling...

Does anyone know of a site that lists particle half life times, all in one place?

Greetings, Is there a commonly accepted notation for a list in mathematics, of an identical form to Ʃ for a summation? If so, what is the name of the symbol (that would be used in place of L, below), and how would it be typed in LaTeX? For instance, it might look something like...

Hi all, I'm trying to put together a fairly comprehensive list of mysteries that science cannot currently explain with the standard theory. So far I've got: dark energy dark matter shrunken proton radius from muonic hydrogen As you can see I've only got three items on the list and...

This comes from the reactors listed here: http://en.wikipedia.org/wiki/Generation_IV_reactor If more are presented in this format I will edit this post and allow mods to edit this post. I think it is interesting to follow the current progress of fission and hopefully I can get help in creating...

I am trying to figure out if it would be possible to develop simple program to preform the following task: If I have a list of drawing numbers contained within excel an file as such, 1-02632-M-07502 0002/03 1-02632-M-07502 0003/02 1-02632-M-07502 0004/08 1-02632-M-07502 0005/02...

List all physics books you know with the level of difficult PROBLEMS AND also where it stands when it comes to THEORY AND CONCEPTS. LEVEL OF DIFFICULTY ! 1.too easy 2.easy 3.average 4.above average 4.hard 5.very difficult 6.extreme 7.insane! 8.are you nuts!

Hey, I'm new here and didn't know where to post this thread but I decided to post it in the homework and coursework questions part although this isn't about homework. My question is, what are some good books about physics that are on a secondary school (UK) level which I can read that is fun and...

I've never done this before. Hope the parties involved are not embarrassed by being pointed out. I feel strongly about clarity of thought and writing in Astrophysics and Cosmology. Every once and a while I see a brief exchange that is exceptionally well written from both sides. Someone asks a...

Understading List of Methids and its Usage in User-32 DLL I would want to understand the list of functions, its Parameters and its usage in User-32 DLL. Could anyone let me know the online source for it. Thank You.

I think it might be a good idea to create a list of various jobs that have an open door for someone with a physics degree, BS, MS, or PhD. I would like to add slightly unrelated fields as well, since job hunting can be a nightmare. I would start this list off, but honestly, I have no idea what...

Hi Everyone! This is my first question for programming. I have very little experience, so if you could explain as simply as possible. I have a list of output that actually looks like this: [SIZE="3"][SIZE="1"]# Query: 2678.m000169 conserved hypothetical protein # Database...

I am dealing with a set of data where I have values C(x,t) for a discrete set of x and t values. Say: x={1,5} t={1,3,7} C={{C(1,1),C(1,3),C(1,7)},{C(5,1),C(5,3),C(5,7)}}. How do I combine this to a list that looks like...

On our first test there were about 4 different methods. This test there are about 4-5. There are 4 tests in the class. I'd like to get ahead. The pattern seems to be that you first identify the method that needs to be used, then simply preform the method steps. It is that strange of a thing to...

Hi everyone, I am thinking of building up a new system to satisfy my need in scientific computing. My program usually involves with for-loop iterations written in Intel Visual Fortran 2013 on Microsoft Visual Studio 2010. Some of my work need to perform numerical methods, like Amoeba...

Homework Statement The idea is to create following type of structure: first_row_with_a_nonzero_cell->next_row_with_a_nonzerocell->...->NULL rowN_with_a_nonzerocell->firstnonzerocolinrowN->nextnonzerocolinrowN...->NULL Input file is a 20x50 sparse matrix. The only problem I have is...

The function ##f(x) = \frac{x}{x+1} ## is not a Homomorphism because f(1) ≠ 1..Am I correct?

Homework Statement Hello, just having a bit of trouble understanding this bit of code: typedef int Item; struct Node { Item data; Node* next; }; typedef Node* NodePtr NodePtr hdlist = NULL; Homework Equations None. The Attempt at a Solution I understand that...

I can't find this anywhere on google. I'm looking for a complete list of functions and their inverses. Here's a partial list as an example *, / +, - e^x, ln(x) sin(), sin^-1() d/dx, ∫ etc.. Why isn't there a list of all of them? You would think that some mathematician would find joy in...

Abstract Algebra Aluffi - Algebra: Chapter 0 Artin - Algebra Dummit, Foote - Abstract Algebra https://www.physicsforums.com/showthread.php?t=704700 https://www.physicsforums.com/showthread.php?t=704865 https://www.physicsforums.com/showthread.php?t=672385 Herstein - Topics in Algebra...

Hello everybody, I've come across this website that contains a lot of old books scanned and for real low prices. They even have a policy of 5 free books per computer, so you can download some before considering buying any. Cheers! (Yes)

Is there a way to see syllabus and textbooks of a university which I'm not belong to? I visit website like course catalog of universities like MIT, Stanford, UC of Berkeley. Some course of some major of some university reveal their textbook used in course but it seems generally that syllabus...

I am a freshman in physics at this point, and looking to get some ideas of some things that I might want to add to my Christmas wish list involving my profession? Although this probably won't make much of a difference, I am a 34 year old adult changing professions to one I have always loved...

How do you list creation date of a file in linux bash? I want to find creation date of some files, not just modification date. Thanks.

Hello all, I am trying to do the list of notations using tabular environment. However, any letter after filling the first page does not appear, i.e.: only the first page of the list of notations appears. why? Thanks

Hello. I'm trying to consider a matrix A and looking at Ak and (Ak)TAk, where T is the usual transpose. This is no big deal. But I'd rather not look at them one at a time--I want to consider some powers k from 1 through as high as I want them. When I try Table[MatrixPower[A...

I'm wrapping up 3 weeks on relativity in my freshman calc-based physics course at the community college where I teach. At my final meeting, I want to spend most of the time having the students break up into their lab groups and discuss certain specific misconceptions, questions, and confusions...

Hi all, I have been looking the electrical symbols for a proximity sensor and a level sensor. A simple google search has not helped and I have also looked at various manufacturers websites, but still no joy. I was hoping somebody could point me in the right direction to a comprehensive list of...

Here's a catalogue of paradoxes in Special Relativity, for convenience sake. If I've missed out any, do notify me. Ladder Paradox: A ladder enters a barn. In the barn's frame the ladder is length contracted and fits nicely, but in the ladder's frame the barn is length contracted and it...

Hello, I have a system of DE involving two variables depending on the parameter t. To solve it I need to specify x(0),y(0),x'(0),y'(0). I know how to solve it with NDSolve, (analytical solution doesn't work), and I want to make a list of different solutions with different initial conditions. I...

where can I find them? all forms to find out any missing quantity?

I'm wondering if the list of particles in the SM is both complete and unique? Or could we find other particles and interactions that could also be included in the SM? Phyisicists sometimes invent fields and particles to account for Dark matter and inflation, etc. But that introduces particles...

the calculation of many quantities involve cross and dot products in their formulae. For cross products, i only know of three: lorentz force, angular momenta and torque. For dot products, i only know of one: work done im hoping to add more to my list. Can you guys help me include other...

This is born out of musings around coalition governments that arise from the party with the most votes not achieving ≥50% of the votes (as opposed to emergency coalitions). Taking the figures below how would one go about determining all the possible combinations of parties who combined have...

Does anyone have a list of at what level gems vibrate at?

I'm really interested in properties of the elements because it is an important philosophical question. A little while ago when I went through my chemistry textbook I wrote down all the properties I encountered. I was wondering if someone would be kind enough to point out some of the properties...

Homework Statement List the elements of the subgroups <3> and <7> in U(20). Homework Equations The Attempt at a Solution U(20)= {1, 3, 7, 9, 11, 13, 17, 19} = <3> = <7>. So basically I have that the common elements of, <3> and <7> and U(20), under + modulo 20, are all...

hello! is there a complete list of mathematical notations? thanks!

My school doesn't have any faculty involved in Condensed Matter Experimentation, and that's what I want to get my PhD in, so I'd like to transfer to a school that offers plenty of research opportunity in this field, instead of just having 1 summer of research experience at an external lab (I...

I've spent a good part of the day looking for a post by one of the members which appeared 3 or 4 years ago and which was linked to every so often by other members. The list had about 10 items in it, one of which was the triangle inequality theorem. IIRC the poster said that he/ she referred...

Hello i got a list already (Which cost me a good amount of money!) But after buying it i analyzed and get that its only based on Texas. I need a list which will cover whole USA. I know people have thee list and they are patented. I want to buy the list from the people who are using them. So...

Today, two white-haired gentlemen stopped by, knocking on my front door. I knew who they were, and didn't answer. I have repeatedly asked for the last 30+ years or so that the Jehovah's Witnesses please leave us alone. It seems pointless, because they keep coming around. I gladly respect...

Hi, I've been trying to find a list somewhere of some of the better HEP graduate programs in the US. I can't find anything specific to HEP though. Does anyone know where I may be able to find this information (online)? I know the some of the more prestigious schools have some of the...

Hi, So I have a circular linked list; each element of the list has a int value and a next pointer to the next element. BUT. When I try to compare rather the NEXT element has a certain value, I always get a true return; how do I properly compare the structure values with an int? I'm doing...

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...

Read more here: http://www.heraldonline.com/2012/06/09/4032952/why-americans-love-obamas-kill.html#storylink=cpy

Dear Peeps, How are you guys doing? Please forgive me if the title is to vague but I am new on this website and I am confused about some concepts I picked up while reading some of the threads here. I consider myself a layman kind of, I am actually studying aerospace engineering and I have got...

Hey everyone, I'm starting applied physics in September, but I'd like to self-study engineering on the side. Not in the sense of practically getting an additional degree by self-studying, mind you, just out of interest... and because I might want to do a masters in engineering after I've done...

Can anyone give me a short list of MUST-READ physics books? I mean books like for example Feynman's 'QED' and Hawking's 'A brief history of time'.

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...