Application Definition and 998 Threads

Homework Statement Find the Green's function $G(t,\tau)$ that satisfies $$\frac{\text{d}^2G(t,\tau)}{\text{d}t^2}+\alpha\frac{\text{d}G(t,\tau)}{\text{d}t}=\delta(t-\tau)$$ under the boundary conditions $$G(0,\tau)=0~~~\text{ and }~~~\frac{\text{d}G(t,\tau)}{\text{d}t}=0\big|_{t=0}$$ Then...

Here is the website: http://www.columbia.edu/itc/applied/e3101/SVD_applications.pdf I need help on understanding the second part of the document, page 13 onwards. On page 15, it showed 3 data sets, relative elevation as a function of kilometers across axis, however at page 16, the author...

I have a degree in mechanical engineering and have taken several computer science courses, so my resume since graduating in 2007 consists of engineering jobs along with my most recent software developer job, which I was laid off from a few months ago. I'm starting grad school next fall (2017)...

Homework Statement Actually, my confusion originated from solving two different problems... 1) A point object of mass 'm' moving horizontally hits the lower end of the uniform thin rod of length 'l' and mass 'm' and sticks to it. The rod is resting on a horizontal, frictionless surface and...

Ok, so I read that a tuple is an ordered list of n elements, where n is a non-negative integer. Sometimes I get confused with tuples and partially ordered sets. So if I organized a list of all the airplanes in a particular airport, would that be a tuple, or would that be a set? I'm leaning...

Hello I was learning about determinants and matrices. I learned the generalization of getting the determinant of an n by n matrix. I then applied this to vector space (i + j + k) via a cross product and noticed that you leave the i j and k in their own columns in the first row of the matrix...

Hi all, I have the following BMI (knowing that P, K and ##\gamma## are unknown with appropriate dimensions; the others are known). [ {\begin{array}{*{20}{c}} {{A^T}P + {K^T}{B^T}P + PA + PBK + C_z^T{C_z}}&{P{B_w}} \\ {B_w^TP}&{ - \gamma } \end{array}} ] < 0 I would like to know if the...

I'm building a web application that will have a lot of client-server action because (if everything goes as planned) there will be around 2000 users at once and a lot of database transactions happening with each user because I've set up event listeners that auto-save answers to questions on the...

Can anyone show me an example of applying the Ricci curvature tensor to something other than GR? I also ask the same for the curvature scalar. Lately I've been trying to truly increase my understanding of curvature, so that I can see exactly how solutions of the EFE's predict the existence and...

Q: How many different colored cubes are there in which each face is colored either red or white or blue? I know we have to use Burnside's Lemma to solve this. (1/|G|)* Σ f(g) where f(g) are the number of fixed points of g. I also know that one of the values will be 3^6, but that is where I get...

Hi everybody, good to be here, but cutting to the chase I have a question that I would love to get some feedback on: I have an REU application 99% done, all I need to do is submit it, but I am not sure about one thing. The application requests for a "cover letter describing my interests in the...

Homework Statement See image. Homework Equations pressure = density*gravity*depth The Attempt at a Solution The pressure at 5000 ft according to the book is 322,000 psf. This makes sense because density*gravity*depth = 2*32.2*5000 = 322,000 psf. How do I apply the bulk modulus equation to...

Homework Statement The probability that a particular computer chip fails after a hours of operation is given by 0.00005∫e^(-0.00005t)dt on the interval [a, ∝] i. find the probability that the computer chip fails after 15,000 hours of operation ii. of the chips that are still operating after...

Homework Statement the original function is ##−6 x^3−3x−2 cosx## ##f′(x)=−2x^2−3+2sin(x)## ##−2x^2 ≤ 0## for all x and ##−3+2 sin(x) ≤ −3+2 = −1##, for all x ⇒ f′(x) ≤ −1 < 0 for all x The Attempt at a Solution this problem is part of a larger problem which says there is a cubic...

Hi Community, I have this question. When I graph it I get: When I answer the first sets of questions a, Intercepts: x=(-6), x=0, x=6 Stationary points: (0,0) , (-3\sqrt{2}, -324) , (3\sqrt{2}, -324) Points of inflection: x=0 This is where I was wrong. (It's a turning point isn't...

Greetings all, Are there resources around to help with writing essays for graduate applications? I have asked a few professors around my department, but as we don't have a graduate program and most of them are young professors who have only recently left grad school themselves, most of them...

Im trying to complete a worked example and just looking for validation whether what I am doing is correct. I am given the following: Supply: 230V ∠0° R: 100Ω ∠0° χL: j10Ω ∠90° χC: -j40Ω ∠-90° I struggled a bit with the j operator and using the polar/rectangular functions but this is what I've...

Hi there! I need a bit of help on a homework problem. The problem is about a voltage (V) across a circuit with a resistor (R) and and inductor (L). The current at time "t" is: I= (V/R)(1/e^(-RT/L) And the problem asks me to use Taylor series to deduce that I is approximately equal to (Vt/L) if...

When should someone create an application for a mobile or a website, if you were to create one of the two? If you have an idea that can be created to be hosted on both, then which would you choose?

Hello I am studying for my exam and there's a question that i don't know how to solve, I have some difficulties with symmetric/permutations groups 1. Homework Statement Consider a finite group of order > 2. We write Aut(G) for the group of automorphisms of G and Sg for the permutations group...

I have a question regarding GRE general as it is new to me. Suppose I have registered for the test on 15th of November and the score will be received by the college I apply on 1st of December. But my application packages (CV, statement of purpose, diploma etc) will only arrive there one month...

I have been preparing for a 9 Th grade talent exam and i can get my head around this problem I keep getting the same answer 5, i used fbd The answer is 7 ; help me out where am i wrong

In Skype, I am getting “Do you want to debug this webpage? This webpage contains errors that might prevent it from displaying or working correctly. If you are not testing this webpage, click No.” Then, I can click or not click "Use the built-in script debugger in Internet Explorer." (No...

Hi guys, I am a senior EE undergrad at UCLA and will be graduating this spring, 2016. I am applying for PhD programs in EE with a focus on biomedical devices (implantable devices and/or sensor networks and embedded systems). I am choosing which schools to apply to and would like your advice...

Homework Statement Is loosening and tightening of nuts using screwdriver considered as application of moment?? Homework EquationsThe Attempt at a Solution

There are two courses I can take for a Differential Equations class at my school. One is for Engineering students and is described this way (I'm a physics major fyi): This course presents an introduction to the theory of differential equations from an applied perspective. Topics include linear...

Homework Statement Prove that current ##I = I_0\sin{\omega t}## can be rewritten as ##I = I_0 e^{i\omega t}## Homework Equations Euler's formula ##re^{i\theta} = r(\cos{\theta}+i\sin{\theta})## The Attempt at a Solution If ##r = I_0## and ##\theta = \omega t ## then ##re^{i\theta} =...

Homework Statement Homework Equations ##a + bi## complex notation Rules of resistors given in part b b = imaginary part The Attempt at a Solution For part (a) how do I rewrite I(t) as a + bi? For part (b) I need a formula that equates Z to R. For part (c) do I simply write b (from part...

When we discuss about Gas Law : [Charles Law, Boyle Law and Gay Lussac Law ] are they still applicable at super low volume and temperature. At such conditions, the gases would undergo phase transition and convert to solid. So will the Gas Laws still be applicable at that stage??

Maximum axial load is proportional to the second moment of area. Thus can we reason that aluminium cans are cylindrical because they have a high second moment of area(mr^2) compared to other shapes(Which gives it a higher max axial load.)?

I currently work as an electrical engineer at a large company. An engineer I worked with for 1 year left the company last fall to help start a new company (approx 15 people). He recently told me they need a young electrical engineer and asked me to apply. I applied and have not heard back for...

Hey all, This seems like a better venue than almost any to make this inquiry. I adore weightlifting and barbell sport, and find anatomy and the applied use of ergonomics very interesting as a rather serious recreational musician as well. I love to discover the "why" behind certain postures...

Hi all, I am in my last year getting my Masters in Mechanical Engineering, with a B.S. in applied physics with minors in biomedical engineering and applied mathematics. I have started to look at job applications, and frankly, they horrify me. Being that I have wide background I often look at...

Hello, I'm a first year student in pursuit of a physics degree and I'm just beginning to learn the hardships of paying out of pocket for college (and my school is relatively cheap, only about $9,000 a year before student loans.) But basically, I'm paying about $650 a month out of pocket by...

I made Dean's List my senior year of undergrad, I double majored and double minored, I volunteered often and I communicate in both the social and scientific realms well. So why am I still getting turned down or "wait listed" from graduate programs? One theory; three semester near the middle of...

When Mac application icons are bouncing in the dock, does their velocity = 0 at their highest point? Here's what it looks like when you open a new application for Mac if you're not familiar. Another way I'm thinking about it: What if you have a strip of LED lights and its on a chase pattern...

I have been engaged in some laboratory projects during my master study. But only one of them which has been written as a paper, it has been accepted but not yet published. Now I want to write a CV for my PhD application, and wondering what I should write in the research experience section. Will...

http://physics.stackexchange.com/questions/195538/prepare-for-hep-th-graduate-application-books-research-opportunities-etc I want to specialise in high-energy physics theory. I feel quiet unconfident because the I just knew that the field is insanely competitive, so I really need your advice to...

Hey community, are there some application for the Dirac delta function in classical mechanics? Im interessted in some application of the famous delta function. If there applications can someone explain it? Greetings :)

I am a rising senior at a small liberal arts college, with an incredibly small (and therefore unrecognized) physics program. I am seeking advice regarding which Ph.D programs are within my reach. I plan on applying to AMO (Atomic, Molecular, and Optics) Ph.D programs with the intention of...

Hi guys, wassup? I am a physics undergraduate motivated to get into top graduate programs, namely MIT. It is not its name or prestige (only a small amount!) which attracts me to it, but the experience I desire, that is, to immerse myself to an environment, surrounded by other students of diverse...

Hello guys! I have recently graduated from my bachelor degree in engineering physics and I wish to apply for a master degree in pure physics next year. I have read ZapperZ's post on how to check my own understanding in physics. However, is there any examinations (or anything else) I can take so...

in traction applications which motor is best suitable? previoulsy dc series motors were used in traction applications due to there excellent starting torque.but now a days it is being replaced by induction motors.why can't we employ synchronous machine in traction application?

Hello, I'm looking to try to use a gyroscope to determine the rocking motion (just side to side - not back and forth) of a boat while it is traveling forward or sitting still in the water. Specifically, I'm looking for the boat's angle from vertical and this angle's velocity. Can I do this...

Sets with cardinality ##2^{\aleph_0}##, that is, with cardinality of the set of real numbers, obviously have many applications in other branches of mathematics outside of pure set theory. For example, real any complex analysis is completely based on such sets. How about higher cardinality? Is...

Hello everyone. I have a quick question, not really about any career field but about a specific issue in job interviews. I received my bachelor’s degree in biology in 2013, but plan to go back to school in the fall to study clinical lab science, with the goal of working in a hospital lab. Right...

Hello, Just as the title asks, what sort of applications would series and parallel connections of Direct Methanol Fuel Cell suit the best? Based from my understanding of Fuel Cells and experimental results, one cell is not enough to power anything, hence they are used in stacks, in addition...

Homework Statement A parallel beam of electrons traveling in x- direction falls on a slit of width d. If after passing the slit, an electron acquires momentum py in the y direction then for a majority of electrons passing through the slit A. |py|d ≈ h B. A. |py|d > h C. |py|d < h D. |py|d >> h...

hello what is the process to apply KVL exactly? we know nothing in a loop, apart from that it consists of 2 batteries with known polarity and 2 resistors. what do we do? we assign arbitrarily the currents to each of the branches that compose the loop? and then we assign polarities to the...

Hi! I'm searching for an application for iPhone, similar to the Android App "Physics Toolkit Light Sensor", so I can use my iPhone as a light sensor. Does anybody know if there's such an app in the App Store? I'm not able to find one. Best regards Lasse