Search found 28 matches

by danreil
Mon Jun 20, 2011 9:35 pm UTC
Forum: School
Topic: Working for a department head as a Ph.D. student?
Replies: 5
Views: 2381

Working for a department head as a Ph.D. student?

I'm going into a Ph.D. program in chemical engineering next year and I have been looking at professors at the school that I would be interested in working for. One of them is the department head, but I've heard that working for a department head can be tough on a student because of all the administr...
by danreil
Thu Dec 30, 2010 3:45 pm UTC
Forum: Mathematics
Topic: The Interesting Parts of Maths
Replies: 13
Views: 2904

Re: The Interesting Parts of Maths

I did a similar project on Fibonacci numbers and their links to Linear Algebra a couple years ago. Another interesting topic that is rarely covered is p-adic numbers.
by danreil
Thu Nov 25, 2010 7:07 pm UTC
Forum: School
Topic: Reactions to your Major
Replies: 344
Views: 61745

Re: Reactions to your Major

I told someone my major was chemical engineering. They thought that meant I was double major in 'chemistry' and 'engineering'.
by danreil
Tue Nov 16, 2010 4:31 am UTC
Forum: Science
Topic: Video Footage of Walking Molecular Motor
Replies: 7
Views: 1171

Re: Video Footage of Walking Molecular Motor

khanh93 wrote:Is there a way to view the video without subscribing to the journal or paying for specific article access?


Any decent university library should have access to Nature. Not sure about public libraries but its worth a shot.
by danreil
Sat Nov 06, 2010 9:26 pm UTC
Forum: School
Topic: How many grad school applications?
Replies: 3
Views: 1608

How many grad school applications?

I'm currently in the midst of applying to grad schools for a PhD in chemical engineering. I was wondering if anyone had any advice on how many I should submit. Obviously I can't apply to like 30 because of time and money, but I'm just worried with low rates of admission I might not get into any even...
by danreil
Mon Aug 16, 2010 3:16 am UTC
Forum: School
Topic: The most versatile undergraduate major
Replies: 18
Views: 3374

Re: The most versatile undergraduate major

If your career choice is to be a researcher, you're gonna need a Ph.D. (so you won't be making 50 k a year after college going that route). Engineering is a good major that allows you to mix technical aspects with business, because most companies will pay for you to do an MBA while working. Math won...
by danreil
Sun Aug 15, 2010 3:29 pm UTC
Forum: Coding
Topic: MATLAB2: comparing two curves/data sets
Replies: 4
Views: 4140

Re: MATLAB2: comparing two curves/data sets

It depends on whether you want a quantitative or qualitative description, and comparing the points would be better to get a quantitative description of the difference between them. But a plot within matlab from the points generated by the other software won't differ in any way from any other plot of...
by danreil
Sun Aug 15, 2010 5:02 am UTC
Forum: Science
Topic: introduction to M-theory
Replies: 9
Views: 2424

Re: introduction to M-theory

This is a great site for learning a good deal of modern physics with little previous physics knowledge. (culminating in string theory)

http://www.phys.uu.nl/~thooft/theorist.html
by danreil
Sun Aug 15, 2010 4:32 am UTC
Forum: Coding
Topic: MATLAB2: comparing two curves/data sets
Replies: 4
Views: 4140

Re: MATLAB2: comparing two curves/data sets

You can use interpolation (the matlab function would be interp1 here) to find the y-values at different x-values. Plus, if you know something specific about how the data set is created you can tell matlab what type of interpolation to use (linear, cubic, many types of splines). Also, why do you say ...
by danreil
Sat Aug 14, 2010 3:03 pm UTC
Forum: School
Topic: Trigonometry and Logic
Replies: 40
Views: 5206

Re: Trigonometry and Logic

Trig is essential for anyone who wants to take calculus and/or take classes in physics or other sciences. It just wouldn't make sense to replace trig with logic because it doesn't fit into the standard math sequence you need in order to learn calculus and then go into engineering or any physical sci...
by danreil
Tue Aug 10, 2010 1:38 am UTC
Forum: Books
Topic: existentialism
Replies: 20
Views: 5359

Re: existentialism

The Stranger by Camus is considered a classic text on existentialism (although as Sir_Elderberry mentioned, Camus considered himself an absurdist). It also deals with atheism in some parts. Its got a interesting story too, in my opinion.
by danreil
Mon Aug 02, 2010 11:32 pm UTC
Forum: School
Topic: Renting Textbooks?
Replies: 10
Views: 1792

Re: Renting Textbooks?

I've never personally used it, but my roommate got a bunch of his textbooks from chegg.com and he seemed to like it. You use them for the semester and then mail it back free of charge.
by danreil
Sat Jul 31, 2010 3:45 pm UTC
Forum: Science
Topic: Would it be possible for humans to pollute the sun?
Replies: 55
Views: 5938

Re: Would it be possible for humans to pollute the sun?

Anything we sent there wouldn't make it to the surface of the sun. It would be vaporized in the corona which is millions of degrees hotter than the surface of the sun. After that, I would guess that the remnants would be blown off in the solar wind and eventually would make their way out of the sola...
by danreil
Wed Jul 28, 2010 1:06 am UTC
Forum: School
Topic: Diffeq...Bad idea?
Replies: 7
Views: 1658

Re: Diffeq...Bad idea?

You don't need multivariable calc for diffeqs, but if the course covers systems of ODEs (it should if its a decent ODE course), then it can be helpful to have taken an intro class in matrices or linear algebra.
by danreil
Mon Jul 26, 2010 1:49 am UTC
Forum: Science
Topic: Laser to the moon
Replies: 20
Views: 3298

Re: Laser to the moon

In principle it shouldn't be impossible, but today's lasers are nowhere near powerful enough. We already shoot lasers at the moon to measure its distance away (by reflecting them back and measuring the time it takes for the round trip). However, you can only recover about 1 in 10^17 photons that are...
by danreil
Sat Jul 24, 2010 4:31 pm UTC
Forum: Computer Science
Topic: Sliders-inspired q.
Replies: 27
Views: 4501

Re: Sliders-inspired q.

It is sometimes said Einstein's General Theory of Relativity would have emerged if it wasn't for the theorist, because it wasn't a great leap away from contemporary physics (unlike the Special Theory, which is meant to be far more revolutionary). Its actually the other way around. Lorentz, Poincare...
by danreil
Sat Jul 24, 2010 3:21 pm UTC
Forum: Coding
Topic: How does the computer generate a random number?
Replies: 30
Views: 4696

Re: How does the computer generate a random number?

I'm not too familiar with how rand() works in C, but did you try feeding the system time into the random seed number?
by danreil
Thu Jul 22, 2010 1:51 am UTC
Forum: School
Topic: Analytical Writing Task in GRE
Replies: 5
Views: 1438

Re: Analytical Writing Task in GRE

I remember my issue essay (where they give you a quote and you respond to it). The quote was something about society working better when its citizens don't question the authority of its leaders. I argued against it and used mainly examples from the big dictatorships of the twentieth century.
by danreil
Thu Jul 15, 2010 2:47 am UTC
Forum: Science
Topic: A cellular automata that simulates the universe
Replies: 18
Views: 4635

Re: A cellular automata that simulates the universe

Are you wondering if this is only possible, or could actually be done to model the universe? Because even if it were theoretically possible, there would be no chance of ever simulating that on a computer. Although I'm not sure if it could even be theoretically done, because how could there be enough...
by danreil
Tue Jul 13, 2010 2:15 am UTC
Forum: Mathematics
Topic: What are my chances at getting into a good math grad school?
Replies: 7
Views: 2490

Re: What are my chances at getting into a good math grad sch

You sound like a pretty good candidate to me. I think the best thing you could do now is try to excel in that math research that you are starting soon. A great letter of recommendation from a research professor can vastly improve a grad school application, especially if it is in the exact area you w...
by danreil
Sun Jul 11, 2010 11:41 pm UTC
Forum: School
Topic: GRE
Replies: 12
Views: 2201

Re: GRE

The math is pretty easy. I thought the data interpretation questions were the hardest. Make sure you get the first couple right because they weigh more heavily on your score than the later ones. Its also annoying on the computer because you can't skip questions and come back to them, you have to ans...
by danreil
Fri Jul 02, 2010 10:52 pm UTC
Forum: Forum Games
Topic: Chopping off letters in a word
Replies: 9
Views: 2329

Re: Chopping off letters in a word

That's what I was doing. I originally thought of trying it as an exercise in computer programming, but pretty quickly gave up that task.
by danreil
Fri Jul 02, 2010 9:33 pm UTC
Forum: Forum Games
Topic: Chopping off letters in a word
Replies: 9
Views: 2329

Chopping off letters in a word

The goal of this game is to find the longest English word which remains a word as you keep removing successive letters from the end, down to 2 letters. For instance, "here" is an example because h-e-r-e, h-e-r, and h-e are all English words. The longest I've found so far is hawks, but I ha...
by danreil
Fri Jun 11, 2010 11:18 pm UTC
Forum: Coding
Topic: Matlab mex files
Replies: 6
Views: 1832

Re: Matlab mex files

Matlab has a built in program that will translate normal m files in to mex files, called emlmex. Look it up in the documentation. I'm doing something very different from you (economics), but I've been using it this morning on a pretty simple program and it takes about 60% less time to run using the...
by danreil
Sun Jun 06, 2010 8:56 pm UTC
Forum: Coding
Topic: What is a good language for a scientist?
Replies: 19
Views: 2911

Re: What is a good language for a scientist?

I'd say Perl and MATLAB. Unless you really need the interactions with the computer, like screen captures, and mouse and keyboard input, MATLAB will be great. Straightforward syntax, interactivity is great, viewing data in different formats is very easy. I never bothered to learn it, but I have a co...
by danreil
Sun Jun 06, 2010 3:38 pm UTC
Forum: Coding
Topic: Matlab mex files
Replies: 6
Views: 1832

Re: Matlab mex files

I used straight C, so the bewildering mess that is C++ need not concern you. It isn't really the sort of thing you should try if you aren't used to C, but I don't recall it being super arcane, either. Sorry, by this do you mean that C++ is more difficult to work with in mex files than C. If so I wo...
by danreil
Sun Jun 06, 2010 3:13 am UTC
Forum: Coding
Topic: Matlab mex files
Replies: 6
Views: 1832

Matlab mex files

I'm currently developing a cellular automata based model of ecological disturbance using matlab. However, it runs pretty slow and rather than rewriting weeks of code into a faster language I was considering writing the two functions that the program spends about 75% of its time on in C++ and using m...
by danreil
Wed May 26, 2010 3:07 am UTC
Forum: Mathematics
Topic: Self Teaching PDE's?
Replies: 5
Views: 1460

Re: Self Teaching PDE's?

Advanced Engineering Mathematics by Kreyszig has good section on PDE's, but its only one part out of many. Its a great reference book for applied math though.

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