Interface Definition and 147 Threads

Matlab "clones" - Graphic interface? I am not into high level maths, but struggling with them from time to time when trying to solve some (for me) unusual problems. Is it any of the so called "Matlab clones" available with GUI? Command line is something that would add an extra concern to...

The greatest problem of thermoelectrics is the need to maintain very low thermal conductivity. How is it possible that pyroelectrics do not have this limitation and do not need temperature differences to produce electricity from heat?If we will heat all pyroelectric body uniformly it will still...

Homework Statement There's a block of glass and it has a refractive index n = 1.5 and it is put in water. Randomly polarized light is incident from the water towards the glass at an angle of 53 degrees to the normal. a) what % p-polarized (part) of the em wave (light) is reflected off...

I'm studying optics on my own and have gotten very stuck on page 75 of Klein and Furtak, the unnumbered equation. Specifically, I don't understand why there aren't arbitrary phase factors inserted; the equation does not look general enough. I checked in Jackson, 2nd edition Classical...

Homework Statement You are given a device with which to operate with an input resistance of 50 W. The device requires 9 V to operate. However, the only available power supply is a 12 V source. Part A:Using only resistors, design an interface circuit to lower the 12 V to 9 V for operating...

I'm setting out on a project, and I need some basic direction. I am a programmer by trade; my father is a mechanical engineer who is pretty good at electrical circuit design as well---together we want to control a pipe organ by computer. The organ is already operated by electrical solenoids...

hello ppl... As a project for my acads I've decided to do it on Interface free Touch Screens... facilitated by its multi touch feature...which would use a Capacitive or SAW type of screen... ..looking forward to receiving your suggestions, ideas .

Here's my background: Completing an engineering M.S. this year. I've done a lot of programming and building systems of ode/pde, neural networks, finite & discrete element models, hydraulic networks. I like coding and computer models very much. My problem is the research topics are...

For my final project I need to code a program to handle a bookstore. Because the Java console isn't meant for stuff like this I decided to make my own UI. The inventory, reports, and cashier section each get their own tab. Each tab has a console output screen, a box showing what you just...

Homework Statement Light of wavelength 418 nm is incident normally on a film of water 1.0 μm thick. The index of refraction of water is 1.33. (a) What is the wavelength of the light in the water? (b) How many wavelengths are contained in the distance 2t, where t is the thickness of the...

Homework Statement I am using the boundary element method to solve unknowns to the Laplace equation from classic potential flow theory for the time evolution of a fluid air interface. At each time step, I need to solve a material derivative equation numerically at every node along an interface...

Homework Statement Consider the plane interface z=0 between metal 1 at z>0 and metal 2 at z<0. Metal 1 has bulk plasmon frequency \omega_{p1}; metal 2 has \omega_{p2}. The dielectric constants in both metals are those of electron gases. Show that surface plasmons associated with the...

Hello all, I have been using ANSYS 10 and now I have to upgrade to ANSYS 12.1 I have read that the Workbench interface has been redesigned from the version 10 that I used to use. Has anyone used this new interface? If so you what are your thoughts? Also, what are your thoughts on the...

Homework Statement I've been assigned the task of creating a graphical user interface in Matlab 7.6, for a program already written. I haven't coded in Matlab before and I'm completely new to the program and interface. My question is not so much specific, but more about what can be...

Hi, I am planning to use SPI mode to interface a eZ430-RF2500 with a Sandisk Secure Digital Card. The eZ430-RF2500 includes a MSP430 microcontroller and a CC2500 RF transceiver. According to the schematic, the RF transceiver interfaces the MSP430 utilizing the SPI mode, using the SOMI, SIMO...

I have a GUI interface designed in MATLAB GUIDE Builder. It works with several MEX files that control a piece of hardware. I need to compile this into a standalone application. The deploytool's build function never compiles - it complains about the MEX files and returns: "Error executing mcc...

In my experiment with R.rubrum bacteria, which can grow phototrophically in anaerobic conditons, and by fermentation in dark anaerobic conditions, I am noticing that the bacteria are growing at the interface between the oil and the water. The experimented is testing: photoautotrophic growth...

funny but I could not reach the info from net quickly.

I am interested in calculating the drag force acting on simple objects (cube and sphere) as they passes from a liquid (water) into a gas (air). I can calculate the drag force as the objects travel through a uniform medium, but I am wondering how the drag force on an object changes as it passes...

I currently have two custom PCBs that perform a variety of functions on signals to and from different sensors, including quite a bit of buffering. The PCBs are between the sensors and a PC104 SBC. I want to take the design to a more functional level by implementing as much of those two PCBs on...

I found two different descriptions about ray transfer martix of interface in two textbook. I am confused about this. which one is correct? I hope someone can help me. _________________________________________________________________ A:Lasers, A.E.Siegman,pp586 B:Laser Resonators and Beam...

Hi guys, I am fairly competent at programming scientific FORTRAN programs (from the CFD world). A friend of mine asked me to help him develop a program which he says will help him in his profession greatly. The backend calculations are incredibly easy. However, what I need to do is this: 1)...

Homework Statement Consider a layer of oil assume n = 1.6 about 5 mm thick floating over a body of water n = 1.33. If a light ray is obliquely incident from air onto the oil surface find the range of incidence angles if any that results in total internal reflection at the oil water interface...

Homework Statement Two well-insulated slabs, one of steel the other of copper, are in close contact as illustrated. Find the temperature at the interface between the two slabs & also the rate at which heat is transferred across the slabs. Thermal conductivities of steel and copper are...

Homework Statement A plane wave is normally incident on tthe planar interface with a medium of refractive index n but the interface moves, in the same direction as the incident wave, at speed u. If the incident wave's frequency is OMEGAo, what are the frequencies OMEGA1, OMEGA2 of the...

I've long been planning to create an interface which provides an overview of my data. I'm not sure how to get started so I'm looking for advice. I'm a numerical relativist and I do a lot of simulations. I organize these by running in directories which I label by date. These directories...

Say I have a capacitor filled with a linear dielectric in a purely electrostatic setup. Then there will exist a uniform electric field inside the capacitor, and the field inside the electrodes is of course zero. The dielectric will polarize, and I should get bound charge at the...

Consider a ray at the interface air and glass (n = 1.5). We know that incident angle i and refracted angle r are related by sin i = 1.5 sin r Can we some how show the relationship between i and r is r = m i + c (straight line)? If you look at the following data, it follows the Snell's...

Hi Ho! On page 322 of Computer Network: A Top-Down Approach Featuring the Internet, 2nd Edition by Kurose and Ross, which is published by Addison-Wesley, it is stated that: "Because every host and router is capable of sending and receiving IP datagrams, IP requires each host and router...

Hi everyone, I have been reading a recent Nature paper (Stengel and Spaldin, 2006) where ab initio simulations on SrRuO_3/SrTiO_3/SrRu_O3 nanocapacitors have been performed to investigate the origin of the so-called dead layer effect in thin-film nanocapacitors. They arrive at several...

Hello Guys According to Classical electrostatics, when you apply a voltage across a capacitor, +Q and -Q charges are induced on a delta region at the interface of the dielectric and the metal electrode. The electric field inside the dielectric is finite and constant while the electric field in...

Hello, I have a small 300W wind turbine (Aero4gen). I also have a weather station which datalog's the wind speed/direction, ect... at intervals of 5 mins also there is a solar radiation sensor (photodiode) (0 to 3 volts). Anyway, i will not be needing the solar radiation datalogging facility...

I need some help here. I need to have a standard PPM servo interface with MATLAB so that I can give it a command in simulink and have a response. I found this device, which eliminates the need to use PPM in simulink. http://www.parallax.com/detail.asp?product_id=28823 Basically, it...

Hello everyone. Very nice forum you have here. I came here to ask if someone can give me a few pointers on Physics. I am totally lost here. I found this page http://www.ictshirts.com/t-shirt/122/quantum-physics-electron-double-slit.htm and they talk about electrons, double slit, interface...

Hi, There seems to be lots of interesting news about Brain Computer Interface recently (and not so recently).. for example artificial vision (even if only a handful of pixels) and controling prosthetics.. also some interesting articles on rat-neuron computer chips etc. What I find most...

Hey guys how's it going this is my first post so take it easy on me :wink: . I'm in my last year of electrical engineering technology, and we need to design and construct a final project. On the list of possible topics was the idea of a bio-med game interface. It would be biomed probes detecting...

A tiny layer of oil (n = 1.25) is situated on top of a water puddle (n = 1.33) in a parking lot. If the thickness of the oil is 242 nm, the what color(s) of visible light will give a strong reflection? 2t=m*lambda/n2 2t=242nm/1.25 and then 2t=242nm/1.33 i just don't know what goes where...

Has anyone had any experience with this? I'm interested in what the programming interface is like and what level of stuff you can make.

http://pdc.xbetas.com.nyud.net:8090/?page=o12preview1 What do you think of the new interface? Looks like they they stole the brushed metal look of OSX.

(this doesn't really apply to me, I'm just curious) How would someone create an interface design with their program instead of compiling it and opening it in command prompt?

an insect hovers in a fixed position above the still water of a pond. draw a diagram to show approximately where it appears to be to a fish vertically below it. Okay I am confused between two things ... is it going to appear at a lower height than original or will be at the same height since...

What fraction of light is reflected from the air water interface? i.e. How intense is your reflection from a lake? since the reflection coefficient is R = (\frac{n_{2} - n_{1}}{n_{1} + n_{2}})^2 n1 = 1 and n2 = 1.33 so R = 0.248. I am not sure how to interprete this? 25% of the light...

Hello all I know an interface is even more abstract then an abstract class. Let's say I want to make an interface called Furniture that implements two class called Chair and Table. What does this exactly mean? Can someone please clarify this? Thanks public interface Furniture { int...

Hi, I'm trying to design a low-cost digital radio interface to communicate with a robot. I'm not interested in exchanging a lot of data, or doing it at high speeds. This design will work well if I can get even 300 baud out of it since I never exchange more than about 1K bytes during a...

How do I compute the electric Field, polarization and flux density at the interface of a dielectric material and a conducting Material?

I googled for ocean, plastic, pollution, "Discovery Times", to find something that I saw last night and instead got this...what a coincidence. I assume that this is some crackpot but all considered it seemed worth a post...

First, let me introduce the situation: I'm an undergraduate physics major taking a course in Experimental Physics. In the lab I am investigating the motion of natural underdampened oscillators. The oscillators under investigation are nothing more than various pieces of metal suspended...