Systems Definition and 1000 Threads

I was wondering if someone could explain how the laws of thermodynamics apply to these so called hydrogen on demand systems and or how these laws govern the operations of these systems. Physics is my next college course but, I am not asking this for any assignments I have, just a personal interest.

Hi, I'm currently a sophomore at a 4 year university. I'm going to be switching my major to something in engineering. (I've talked to an advisor to verify that I can do this without postponing my graduation. My school offers an undergraduate degree in Computer Systems Engineering and a masters...

I want to learn some embedded systems programming on my own and explore it as a career option. Where should I start? Book recommendations? I have programming experience in assembly, C and higher level languages, and I've taken one computer architecture course. I love my linux, so I'm interested...

This paper dates to 1998: Cooperstock, Faraoni, and Vollick, "The influence of the cosmological expansion on local systems," http://arxiv.org/abs/astro-ph/9803097v1 They show that systems such as the solar system, galaxies, and clusters of galaxies experience nonzero effects from cosmological...

In our solar system, the more massive planets orbit the Sun in between less massive planets. I was wondering if it was by coincidence or if it's dictated by some universal law in all planetary systems. One would think more massive planets would be closer to the sun but I'm clearly missing...

Homework Statement http://img15.imageshack.us/img15/1671/capturetwy.png The Attempt at a Solution Could someone please explain what is meant by "if v is constrained to 0"? Also how do you find a relationship between two axis of different coordinate systems? I really have no clue where...

Homework Statement These are two of the excercises where I'm supposed to calculate the mechanical advantage of the pulley systems. Excuse the crude MS paint drawings, I do not have access to a scanner or a proper camera. The red dots are where two cables connect. The Attempt at a...

We may solve a function or check a theorem but sometimes the mathematics is easier when we switch from different coordinate systems. What can we look for that tells us changing is a good idea?

Lately I have been reading about nonlinear systems and chaos. It's fascinating and I would like to know more about how I could prepare myself to possibly study this in grad school. I would be interested in looking at biological systems such as neural networks or even animal populations. I'm a...

Like linear algebra goes in depth about linear systems, what should I look for to learn about the extension of linear algebra to nonlinear systems? Is there a name of the field of study? If I go into a book store to buy books about it, what should I be looking for? Abstract Algebra? Complex...

Hi. I would appreciate if some one could help me with my question. But first some background: There is a classical problem of inverted pendulum under control. Pendulum can be put to UNSTABLE equlibrium and (if no control applied) it can put itself to STABLE equlibrium. So system under...

Homework Statement I can find my eigenvalues just fine, and they're both real, as expected. My first eigenvalue is -3, which I know is correct. I have the equations 5x+(3-i)y=0, (3+i)x+2y=0 Both of the equations come from my hermitian matrix, after I substituted λ=-3. Homework...

Can anyone prove that Time Dialation affects biological systems?

In a metallic system, the Fermi level is crossed either from the conducting zone into the non-conducting zone or vice versa. Is there an interpretation one can give to the direction of the crossing? In other words, if the 1D band gap diagram shows the fermi line is crossed from the...

This is a retake of a recent question that was perhaps misunderstood by the moderators. As a reminder: "As a rule of thumb, some topics pertaining to religion might be permissible if they are discussed in such a way so as to remain neutral on the truth of, or value judgments stemming from...

I plan on switching from electrical to aerospace engineering in the winter and aerospace engineering at my university is basically split into 4 parts, the one that seems to interest me the most is the space systems design), but I'm curious if there is any aerospace engineers here who are in that...

I know the orientations of the x-, y- and z- axes for a right-handed and a left-handed system. But that's for the cartesian coordinate system. How are the orientations of the coordinate axes for other coordinate systems defined? Also, i X j = k, j X k = i and k X i = j. How does this apply...

I am quite confused for the thermal-hydraulic codes for cores and the thermal-hydraulic codes for systems. I know COBRA is a thermal-hydraulic code for cores and RELAP is a thermal-hydraulic code for systems. For the reactor transient analysis, Does it need to couple the neutron kinetics codes...

I know this is a general Mechanical Engineering forum, but there is no Hydraulic forum and this is the nearest trade. https://www.youtube.com/watch?v=47Dx6TvuJTc I've been doing a project on electrostatic discharge, and the company I work for (I won't mention the name as I'm not here...

I'm looking for the BEST and most COMPLETE book describing - The quantum mechanics of the hydrogen atom (working out completely the Schrödinger wave equation) - The quantum mechanics of many-electron systems (with a thorough explanation of the independent particle model, central-field...

I need some clarification here... Homework Statement There are two masses and a pulley. The pulley has R = .12m and I = .09 kgm^2 Mass 1 in hangs freely in the air and is 4kg mass 2 is on a table(no friction) and is 6kg I am finding the magnitude of the accel of mass 1...

Hi all, I will be studying Signals and Systems later this year and it would be great if you could recommend me some books, tell me why you prefer them over others and describe them a little. The contents of the course will be both time-continous and time-discrete signals, sampling, Z, Fourier...

Ok, to start off I have been examining the structure of polynomials. For instance, consider the general polynomial P(x)=\sum^{n}_{k=0}a_{k}x^{k} (1) Given some polynomial, the coefficients are known. Without the loss of generality...

Hi, I'm in my second year (out of 5) of Systems Engineering. I would love to study Astronomy (which is also a 5 year career) after I get my degree, but I don't know how useful it would be to finish studying that late, and I'm not sure how useful it would be to have both degrees. Obviously I'd...

Two blocks of identical material are connected by a light rope on a level surface. An applied force of 55N [right] causes the blocks to accelerate. While in motion, the magnitude of the force friction on the block is 44.1 N. Calculate the acceleration of the blocks...

What is the "first positive", "second positive", "first negative" systems of nitrogen Hello, I have been trying to catch up on spectroscopy theory, and I'm trying to get a grasp on what all the terms mean. I constantly seem the terms "first positive system", etc... coming up, and I'm not sure...

Hello from a non-engineer. This post has a very practical purpose: I'm about to move into a small loft apartment with high ceilings but limited living and closet space. I'd like to find some way to mount a pipe to the ceiling via pulleys and rope or cable that can be lowered and raised with a...

Hello everybody, In Bell's theorem and CHSH, A(a, \lambda) is defined as the outcome for detector A with setting a and hidden variable \lambda. The outcome of this can be either -1, 0 or 1, so three outcomes. It is clear what outcomes -1 and 1 refer to. But what about 0? Two relevant...

Hello all I have an MS Systems Engineering, BS Computer Science, and AS Engineering. I'm looking for a PhD program in Systems Engineering but with a specialty in a technical area. It appears one possibility is Aerospace Engineering. My academic adviser has not been supportive of...

Homework Statement I uploaded the problem statement please see attachment for original problem. The problem number is 4. Homework Equations The Attempt at a Solution For clarity I uploaded what I have done please see the attachment with my work on it. I am not sure if I am doing...

Homework Statement Suppose that you are the manager of a sheet metal shop. A customer asks you to manufacture 10,000 boxes, each box being open on the top. The boxes are required to have a square base and a 9 cubic foot capacity. You construct the boxes by cutting out a square from each...

Homework Statement A wire 60 feet long is cut into two pieces. Is it possible to bend one piece into the shape of a square and the other into the shape of a circle so that the total area enclosed by the two pieces is 100 square feet? If this is possible, find the length of the side of the...

I know this is a simple question but I can't exactly figure out the logic governing this problem, I just know it had to be this way. Let's say I have two equations: x - 4y + 9 = 0 y - 3x + 5 = 0 If I set them equal to each other then I get no where because I'll have both x and y in the...

Hi, I made this program in java, take a look: https://github.com/BetoKahn/Gauss For the english version I didn't uploaded the code, only the runnable .jar file. For the portuguese speakers you can see the code. I hope you enjoy,

I would like to know relevant materials/links that would help ma further my research in fault analysis.Thanks

Dear All I have a question about the validity of Maxwell Boltzmann velocity distribution in the case of nanoscale systems. When you consider a nanoscale system such as flow of water molecules (less than 100 molecules) through a carbon nanotube or graphene sheet, is it possible to expect a...

Homework Statement A store sells cashews for $5.00 per pound and peanuts for $1.50 per pound. The manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for $3.00 per pound. How many pounds of cashews should be mixed with the peanuts so that the mixture will...

I was trying to solve out this problem for homework and I came to the answer of all of them being false because they all went to infinity...but I have a gut feeling that this is wrong.

Why don't AI systems have "good" voices? Is it difficult to engineer an AI system that actually sounds like a human (in terms of speaking)?

Hi there, I am confused about the relationship between coordinate systems and reference frame in GR. I understand the coordinate systems can be used to describe reference frames, for example, Local inertial frames in GR can be defined by Riemann Normal Coordinates. However, take the...

Hello all, I was wondering if any of you have a good method for checking your answers to linear systems of equations(when working by hand). I mean the sorts of equations you would encounter on a first university linear algebra course. I solve the system with Gauss/Gauss-Jordan elimination...

Hello, I'm having looots of trouble trying to find out the operative slip systems of hcp metals. the slip system is {001}<100> and in my notes it says that there are 3 slip systems and I don't see why! I'm guessing there's only one slip plane the (001) or (0001), and three directions. But the...

Hi everyone, I've taken a course at uni that may be a little bit over my head, and am pushing through an assignment for it at the moment in an attempt to do well. I've hit a bit of a roadblock on one question though, so am hoping that someone kind here can help me out! The question is...

hey guys ,, how are you all ?? guys , I've got the following problem , Air enters a gas-fired furnace at 20deg at a mass flow rate of 0.2kg/s and is burned with an air-fuel ratio by folume of 12. the gases leave the furnace at 350deg. A run-around coil system is installed to recover some of...

Homework Statement So I have this question given to me, basically there is a aero simulator which makes the ground shake so the data logger gets false readings, now to solve this problem a vibration absorption system has been added. Please see the attached System A.png file for the complete...

Two questions, actually. These just come from me doing a couple of problems on Fourier analysis from Rudin's text (I haven't actually taken a full course in the subject; we just spent about a week studying the topic in my real analysis class). (1) The Weierstrass Approximation Theorem...

Homework Statement Question in the image.Homework Equations I got a but can seem to get the answer for b which is $$\vec{x} = c\begin{pmatrix} 1 \\ 0\end{pmatrix}$$ where for any scalar c The Attempt at a Solution I managed to get it to $$\vec{x}(A-1)=0$$ $$= \begin{pmatrix} 0 3 \\ -1...

Hello to everyone I am a CAD student. I am doing research into different CAD systems available. Could you please tell me what is the top 3 CAD systems available in the market today? I would like to ask out of these three CAD systems which is best & why? Please could you give me a brief...

Homework Statement Write the given system in the form x'=P(t)x + f(t) x'=-3y , y'=3x Homework Equations x'=P(t)x + f(t) x(t)=c_1x_1(t)+c_2x_2(t)+...+c_nx_n(t) The Attempt at a Solution I have no idea how to start this since my teacher never covered this in our notes and the book...

if we are given a polynomial s^6+as^5+bs^4+cs^3+ds^2+es+k (if a,b,c,d are known) what is a clever method to solving for the value k if we are given the following: the above polynomial is equal to the following(zeta is given as some constant, say 1 for simplicity)...