Issues Definition and 407 Threads

OK, I posted here a while back with issues home networking, specifically between varying operating systems (Ubuntu 10.04, Windows XP, Windows Vista, and Windows 7...sigh). Either way, suddenly the other day, I was on my desktop and noticed that I could find my girlfriends Windows XP machine...

i am trying to write a program that encodes and decodes. my code works fine for encoding 1 string of characters with no spaces, but when there is any type of white space, it fails. also, when i try to decode, i get a random mix of characters and symbols. any help would be appreciated. for...

Hey there PF, as you can see I am newly registered here, but I have been floating around for a little while now reading the forums. That being said, I come to you today in hopes that I can get some answers and resolve these problems I have regarding String Theory. I just recently finished...

I've read the (a?) MATLAB file on memory on their webiste. Basically, their advice deals with data generation, which I'm not having a problem with. I generated the data sets quite easily on my 64-bit dual core, while simultaneously posting on physicsforums and playing muds. But once I got the...

Hi! For long time I have doubt about shipping.This is an option in most telivisons' MFG menus.. When I was repairing my hyundai TV remote.I just pressed down a key on board which was not given on case of remote.The whole colour was changed reddish.I then went deep in the options colour...

I'm a student, and I had to do a freefall program. But I'm having some issues with variables. As soon as a subroutine ends, they go bananas! The problematic trio is 'y','v' and 'nshow'. When the subroutine Euler ends, 'v' gets the module of y, y go to zero and nshow to 32767! How can I fix...

We are rigging up a power cord for a cordless drill for work. This is necessary because the batteries are starting to die on some of the models. We rigged it up so we can plug the drill into a variable DC power supply. We can control the voltage and amperage output on this power supply. When...

So there are two vector problems that seem to be classic: someone trying to swim across a river that is flowing and an airplane flying with a given wind. For example, one might say a swimmer is swimming at 1m/s across a river with a .5m/s flow of water. Of course, you do the exercise to find you...

Im having some trouble with these conversions, specifically numbers out of the -127 to 128 range, and numbers with bases that are not 10. My book is asking for the 2's complement of -19210 and -458 in 8 bits. Here is my work. -19210 19210 = 110000002 (Do I add on another 0 on the left...

Hi,I am new here^^17 years old... I got a little problem with understanding how simple alternating currents motors/AC Motors work... Anyone has a good Table or Figure?? Magnetic problems: 1)Whats the difference between inducing current and normal electric current?? 2)Whats the meaning...

my view. The current theory of the higgs field is based on the higgs boson. Now a boson, in theory has to conform to the rules of super-fluidity or a Bose-Einstein Cond. I can confer because of this, All higgs bosons, would be interlocked as a field acting as one particle. I can say that since...

Im having some four-vector definition issues. I have a relativity exam coming up and they quite often ask about 4-vectors. 1) Does this definition sound ok? 'A four-vector is 4 numbers, say X=(X0, X1, X2, X3), used to describe an event in minkowski space. The 'zeroth' is the time component...

I have the following example that I need to compile in using Verilogger Pro. The example is that of a 4-bit universal shift register. We are told to take the code from our textbook and create a test bench. I am not worried about test bench at this time, I am having problems compiling the...

I didn't know if it would make sense to split this into two separate threads, so I've combined my two questions. My first question deals with test taking problems I'm experiencing with Calc. 1. The way we get grades in my class is 80% tests and 20% quizzes. In turn, this means all homework the...

I'm working on a robot for my final project in class. It's your basic line following deal. It has 5 sensors that face the floor on the front and it just follows a track made of black tape. I'm just going to use this one thread for all my issues. Current issue: I don't get a certain type of...

I just bought a brand new TI89 and the second I turn it on I go to Home. I press F1 to go to tools and the Open and New functions are fuzzy. It won't allow me to use those functions either. This is happening all over the place as I looked throughout the calculator. Any ideas?

Homework Statement Write a program that approximates the probability that at least two people in a room of 50 people have the same birthday. Run 5,000 trials, count up the number at least two people have the same birthday, and divide by the number of trials to get a probability. Homework...

i have reacted zno2 wth Dodecyl benezene sulphonic acid and aniline for the incorporation of zno2 in the matrix of polyaniline.after xrd i m nt getting the exact peaks of zno2 in my composite..can u tell me why? is it forming any complex or wat? please reply soon its urgent Thanks

There is a problem in Avant when getting the web page for gmail. The layout is screwed up. A similar problem holds for National Geographic. Avant forum responses for fixing either don't work or are too obscure to interpret. Has anyone found the correct fix??

Homework Statement I need to be able to get a equation to figure out the initial speed as an object leaves the origin, and I don't understand what exactly I am suppose to treat these as? Basically they are showing us vectors, Vo being velocity vector, and Vox and Voy being x and y components...

I'm having issues with overheating and need a little help. I have 8 6v4ah rechargeable lead-acid batteries. I wire 2 in series for 12 volts. Then i wire the sets of 2 in parallel, because I want to keep my system at 12 volts. That means I have 16 amps. Every time I add more sets of...

HI! I am actually working on a project involving Acoustic Modem. However, we met up with some problems. We actually took the acoustic modem from another item. Thus there might have been some programming done to the modem which we do not know. The acoustic modem will work when its...

hi i wrote the following code. i think it's fairly easy to understand what I am trying to get it to print. but LaTeX really doesn't like it. any advice? \documentclass[12pt]{report} \usepackage{float} \usepackage{multirow} \usepackage{graphicx} \usepackage{subfigure}...

I've noticed that several of us, if not many of us, are flyers, including one of the admins. I'd like to propose a thread to discuss current aviation mishaps, or at least ones which recently occurred. It's not a place to dig up old accidents, other than as they're related to current/recent...

I must be doing something wrong. Every time I try to post some Latex it never shows up; I always get the 'broken image' image. \alpha\beta\gamma\delta [ EDITED to work correctly ] Even if I get the syntax wrong, it should still show up, right? That doesn't cause an error. Am I not...

This is a follow on from a previous thread about issues I had with regular Eddington-Finkelstein coordinates. First I show a brief derivation of the advanced EF coordinates which appears to have less issues than the regular EF coordinates and then discuss what I think appear to be the remaining...

Hi, Eddington-Finkelstein coordinates claim to prove that photons can only travel in one direction, towards the central singularity, below the event horizon. My intention here is to put EF coordinates under the microscope and see how that proof stands up to close examination. The Eddington...

Homework Statement 1.a) the velocity components of a 3-d flow are u= \frac{ax}{x^2+y^2} v= \frac{ay}{x^2+y^2} \omega = c where a and c are arbitrary constants . show that the streamlines of this flow are helics x=acos(t) ; y=asin(t) ; x=a*c*t a. what is the...

Homework Statement specific volume of steel = 489 lb/ft^3 http://ultraxs.com/image-5D1E_4AFD177E.jpg Homework Equations I tried using Ixo=1/4mr2+1/12ml2+md2 The Attempt at a Solution I tried using d=70mm because of the parallel axis therm, but that was wrong. my... r=110mm...

First of all, I'm not an electrical engineer. I'm just a software developer who has written an application to do push-to-talk over wireless LANs on Windows Mobile devices, mostly for warehouse environments. We've got a prospect right now who wants to run our software on some forklift terminals...

Homework Statement PV = PMT *1-(1+i)^-n / i PV = 225 * 1- (1+.0055)^-42 / .005 PV = 8417.37 How did they get this. how do you use a negative exponent on a scientific calculator. Homework Equations The Attempt at a Solution

i shut down all applications in my windows vista business using msconfig. now, everytime it boots my computer displays a message "please wait while TPM is connected". also the clock always shows wrong time and date. what's wrong?

I am having difficulties with my citations. I am using apsr.bst as my style and want my citations to appear in the following format: lastname year or lastname & lastname year without any parentheses or commas. Currently, every style I have tried (apa, chicago, apsr), shows up in the...

[b]1. Homework Statement [http://img44.imageshack.us/img44/1104/58339946.jpg ][/URL] [b]2. Homework Equations [F=k*abs(q1)*abs(q2)/r^2] [b]3. I understand the equation, but I am having trouble with my signs and also how to include the distance in the equation. I know that the...

Hi all - I've been working on some code in Comsol w/ Matlab that works fine on any machine I run it on - so long as I run it through the Comsol w/ Matlab GUI. No matter which machine I run it on, the program fails if I run Comsol w/ Matlab through a CLI. Specifically, the geominport()...

I drive a '99 Chrysler 300m. Recently on an hour long freeway trip the interior lights were randomly turning on, then after a random time from a few secs to minutes they would turn off. At first I thought a door ajar sensor was flaky, but then realized that the dash display did not show a door...

Hi everyone. I'm stuck on a problem, banging of head etc. Basically, I've got a time-evolution problem restricted to the positive quadrant of complex space, where the state of the system \psi \in \mathbb{C} is described by the following type of ODE: \frac{{d\psi \left( t...

I am trying to solve this differential equation: http://sites.google.com/site/theuntouchableproject/" I believe i can come up with 2 boundary conditions for p and dp/dx. i want to create a mesh such that i can solve this equation at different locations that i perscribe. What methods can i...

Homework Statement Vector A and four other vectors that have the same magnitude but differ in orientation. a) Which of those other four vectors have the same dot product with A? b) Which have a negative dot product with A? http://img195.imageshack.us/img195/7079/40191924.th.jpg (Those...

This question would perhaps be an ocean engineering question, but since we don't have a forum for that, I thought mechanical engineers would have some idea about this. My background is electrical engineering, and I have little knowledge about the mechanical issues when operating at the surface...

Hey All, I am working on developing a current source which utilizes photocouplers (PC817s) on the connection between a digital potentiometer and a PC. I have the photocouplers (not the digital pot yet) so I am trying to verify that the photocouplers are working as expected. The way the circuit...

Switching to a Matrix Hamiltonian -- Conceptual Issues It's probably very clear and well-established for those who rigorously studied Quantum Mechanics but I don't think what I am going to ask is easily 'google'-able but if it is so - please send me to the correct source before spending time...

Is it against code in any way to have a 460v motor connected to a 480v supply voltage? What problems can be encountered when doing this? Thanx

I really don't get this group theory stuff at all. These should be simple questions, but alas not... Homework Statement Assume that * is an associative operation on S and that a is an element of S. Let C(a) = {x: x is an element of S and a*x = x*a} Prove that C(a) is closed with...

1. The problem statement: A 98 kg man lying on a surface of negligible friction shoves a 86 g stone away from himself, giving it a speed of 4.5 m/s. What speed does the man acquire as a result? 2. Homework Equations : Pi = Pf M1V1 + M2V2 = M1V1 + M2V2 3. The Attempt at a...

1. How to attach my wheel, plastic lids with rubber bands around, and axle, a wooden dowel rod 5/8 in diameter, to the car body, which is a board of wood? I used a wood block and attached the too the body and drilled a hole big enough to slide the axle. I also put a piece of aluminum around...

I have a problem with the pointing device or any external mouse connected to my Toshiba Satellite A300 - 15M. I use windows vista. When I just move the cursor above any icon, it selects it as if I clicked on it! and if I clicked the icon once, it opens as if I double clicked it! Also when the...

Hi all! I'm currently doing an experiment using a compound pendulum trying to determine the value of g. I have a problem with my uncertainties: Error in period T: The period is measured with the use of a photo-gate of accuracy +/- 0.0001s. For each height i did 20 measurements from which i...

So since I'm a freshman, stuck in a tiny dorm for this year that I pay about $7000+ for (which I share with another person I may add), I am eager to get out of university housing. I've taken a look at several properties and my plan was to move in with my friend, a girl who I've known since...

Hey all, after producing a fig. with matlab, I save it as a PDF. But upon opening the pdf it seems to cut the fig to a portrait page, when the figure is actually a landscape image. Any ideas? For an idea of what's going on, see the attached file.