Issues Definition and 429 Threads

Hi, I'm building a STM, and this is the circuit I use : http://www.geocities.com/spm_stm/Simple_STM_Rev_C.PDF I'm right now testing the circuit I build. I build a small part (U3A), and then test it, and build another small part (U3B) and test, then connect the two and test it again...

Hi Ho! When someone would like to implement a multiprogramming in a computer system, what kind of issues related to I/O does he have to consider? Is there any difference between the implementation of multiprogramming in the system that uses interrupt driven I/O and the system that uses DMA...

I have an academic planning issue. Since I never had any interest in mathematics or mathematical sciences in high school, I never took a course past Algebra/Trigonometry, and didn’t pay attention to any of my physics or chemistry courses. After I graduated high school, and started to read a lot...

Hi all, I know this post topic does not really resemble any of the other threads in this subforum, but it is the most suitable place I could find. Anyway, I am currently enrolled in a class entitled "Ethics and Tech Profession." Part of the requirements is to write a paper in which I...

I got a problem with ultra high vacuum system, and would like to know some advice. A UHV chamber just moved to the lab, and I cleaned it with aceton, put the ion pump indside and sealed all the ports, and I've been pumping the chamber for like 3-4 or 2-3 weeks. I leak tested it by a helium...

my dvd writer seems to have gone mad. i burned 5 sony dvd's first n they all were fine, then the next one got thrashed and then 2-3 dvd's got wasted. again few next dvd's were fine. all my dvd's were of sony. things continued. now i have about 10-12 fine working dvd's and same number of "REALLY...

I'm generating a graph in gnuplot, using the postscript enhanced terminal setting, and trying to use symbols in the axes labels, then import the ps file into a latex document. The trouble I'm having is that the symbols in the ps document, don't show up properly in the final document after the...

Sorry for wordiness, the power problem is probably simple... Im a CSE student working on a team trying to create an IBM 704 emulator. It's a big headache, but all that aside, one of our components is a Vortex86 pc104 compatible single board computer...

My friend's p/c is unoperatable, she gets a notice stating mouse not connected. How can we correct this, thank you.

So I just salvaged the HD from my laptop which just imploded itself, it still works and all (I have it connected to an enclosure and USB'd into my computer), but I can't get my files off of it. It keeps saying that the access is denied, and I realize this is a microsoft privacy thing, but is...

Hi, I'm currently making a hydrophone and I'm planning to use a piezo crystal as a sound receiver whose output I then intend to put through an op-amp. Berkeman recently raised an interesting point about voltage issues with op-amps so I thought I'd pose this question before proceeding any...

Hello, my colleague has a problem. He has a Monte Carlo simulation written in C. But his program gives different outputs in case he compile it using g++ or icc. He has nothing changed in his source. He is using standard random number generator drand() with initialization srand((unsigned) time...

Just a warning, my laptop came with mcafee and windows vista installed, once i had registered mcafee my internet speed dropped to a crawl (even with mcafee protection turned off), the only way i could get my internet speed back was to uninstall mcafee, do people not test compatibility issues?

Recently I have upgraded my pc with as new video card, I'm left with the old one which is Geforce5200FX, it has 256MB SDRam, I have an older pc , with 815 Intel motherboard.. what I read about the specs that the video card should be no more then 64MB... my question is it safe to install the...

Poverty is the state for the majority of the world’s people and nations. Why is this? Is it enough to blame poor people for their own predicament? Have they been lazy, made poor decisions, and been solely responsible for their plight? What about their government? Have they pursued policies that...

My first assignment in chemical engineering basics class, and already I am having the problems! Homework Statement A horizontal cylindrical drum is 2m in diameter and 4m long. The drum is slowly filled with benzene (density = 0.879g/cm^3). Derive a formula for W, the weight in Newtons of...

Hey everyone! I am new here and I need MAJOR help on an experiment. It's grade 12 university prep Chemistry course that I am doing via correspondance. Basically I have read through equillibirum notes (Like 20 pages worth and I am VERY confused). I get the basic idea but am still haveing a tough...

Homework Statement I have been told: Two variables x and n are connected by the formula x=a( n^b). When n = 2, x = 37; when n = 3, x = 66. I have been told to find a and b. Homework Equations x=a(n^b) (I've put the brackets there because I don't know how to differenciate between...

Finding the Spring Constant -- Help! Algebra Issues! Molecular bonds can be treated like springs. From the vibrational frequencies of the bonds, one can determine the appropriate spring constants. Hydrogen, H2, has a vibrational frequency of 1.3192 X 1014Hz. Deuterium, D2, is an isotope of...

In electromagnetism, when there is an emf is induced in a secondary coil from a current flowing in a nearby primary coil (such as in a transformer), then how is the mutual inductance, number of turns of each coil, the current in the primary coil, and the emf in the secondary coil related...

We had an initiative that will prevent government seizures of property, via eminent domain, for purposes private development. I really liked seeing that one. A big fat aye for that one! I have a new approach to law and order taxes. I have always supported taxes for law enforcement, but I...

Hello everyone. Our book has a problem where we are to fill out the missing spots and its quite confusing, I'm not sure if i got this right or not. Any help would be great! Here is the question/directions: The following is a proof that for all sets A and B, if A is a subset of B, then A U B...

Hello guys, I'm new to this forum. Ah.. I'm having a problem with statics, was supposed to pass up my lab report today but was told to redo the introduction. I was told that the introduction must mention Static equilibrium->Newton ->motion->translation->force->center of mass...

I have an interesting problem: I'm moved into university and people can't join custom games I create in warcraft 3. However, people CAN join games I create in starcraft. What would cause this? How do I fix it?

hi all, I am new to the forums and am certainly enjoying my stay here (great topics and threads!) :-p Well, I just started out installing and playing around with Maple 10 today. It is a little different to use. Maybe someone can help me. I plug in this equation exactly the way it...

Does anyone know why the DVD made in our livingroom [-RW] recorder isn't even seen by my laptop's +- RW compatible DVD player/recorder? XP only sees it as an unformatted disk. It plays rented movies just fine.

Alright, so I seem to be having difficulty setting this one up. Here's the problem: http://synthdriven.com/images/deletable/help4.jpg" The way I began to go about it is as follows... \Sigma \vec{E}=\vec{E_{1}}+\vec{E_{2}}+\vec{E_{3}}=0...

What are the possible issues of using Quatum Foam ?

Hi I'm getting used to the FeynMF package used to draw Feynman Diagrams in LaTeX, and the hard work of learning to use the package has paid off. However, there are a couple issues that I'm having with the package. 1. Labels don't appear even when I use the \fmflabel command or the l=blah...

[SOLVED] Measurement Issues: POVM, Neumann and generalized What is a POVM measurement? How is it different from Nuemann measurement theory and what would be the most general measurement formulation? Please keep things discrete and not continuous. -KM

Sorry if this is not the right place to post this, but as of late I have been unable to see a lot of latex, all I see is "please wait while...is loading". It never loads.

We have an inverter driven 3kw motor at work that is the main drive for a piece of kit we have, it drives via a 300-1 or so gear box, you can turn the whole thing with one finger via the fan on the motor, the problem is the 3ph cable to the motor hardens an breaks down, it is the recomended...

This is rather useful. While it covers primarily materials issues in the Tokamak environment, the issues concerning the performance of materials in an irradiation environment are generic. ITER - Materials R&D - http://www.iter.org/MaterialsRD.htm In Light and Heavy Water Reactor...

Hey all, I burned a .iso of kubuntu live, i did it right because in windows the autoplay thing works and the menu of stuff to install comes up. but when i try to boot from it, no go. help? I should note that i have xp and suse on the same computer, grub is used to boot one or the...

I have two wireless mice both made by microsoft. These things always stop working. What a rip off! You have to turn the batteries and fiddle with them until they make good contact so that the light will shine brightly enough to work. This problem is the same on both of them! They also go through...

Yesterday I burnt a movie to a dvd using windvd, so last night I went to watch it downstairs in the dvd player, it turned out to be very choppy and a result of the choppiness there was a delay in the sound. I have a P4 with 512mb RAM in a new laptop. Whats the problem? Anyone else use windvd...

The Quantum Erasure experiment by Scully et al http://arxiv.org/abs/quant-ph/9903047 appears to have generated more questions than it has settled. Please look at attached figure below, which I believe is isomorphic to their quantum erasure experiment Fig. 2. Photons A and B are entangled...

As you know wi-fi is a radio signal and I'm wondering if physics can help me by determining why is my internet acting weird on me. I know about waves and nodes and antinodes and I'm wondering does wi-fi have these properties and how can i position it. In a geological perspective its distance...

It's not really homework, although that is where I encountered this first time. I had to evaluate the integral from zero to whatever of 3^x. I realized...while dy/dx of e^x=e^x the dy/dx of any number not equal to e does not follow the same pattern. It has a different formula. Same for...

My father's computer is exhibiting weird behavior. It seems not to like certain websites (for example apple.com, mcafee.com). When one tries to load one, it times out and IE displays it's page for a DNS error. What makes it worse, is a few days ago it suddenly fixed itself only to go back to...

I have been using Firefox v happily for a long time now, however, after upgrading to Version 1.5 on my laptop it has lost the ability to access the internet! Some additional info: the laptop connects to the web via a wireless LAN, firefox DOES load but displays the 'Page cannot be...

Here's the question: If: b b ∫ f(x)dx = a + 2b, then ∫ (f(x) + 5)dx = ? a a I'm thinking myself into circles... I want to say I need to take the derivative of a+2b to then find out what equals f(x) and then just take the...

Does anyone know how to do this? I have read some things about downloading and compiling things, but I just want to play dvd's. Any help is great!

Im trying to plot a 3d surface graph, but I am having trouble. I have 3 data inputs, x,y,z. I also had X and Y=Y' which are the min:int:max values. Because I only have a few points, I tried to do Z= griddata(x,y,z,X,Y) to interpolate the results. But it comes up with an error saying that not...

I'm trying to create an area mep for an image, but it's not working right. any help? <html> <head> <title>Enter through the door</title> </head> <body> <map name="amap"> <area shape="rect" coords="474,202,541,358" href="../leveltwo.htm"> </map> <center><img...

Java's "Scanner" Hello, I own a Macintosh and was trying to write a simple Java program for one of my classes. However, I quickly discovered that it appeared that the Mac does not have the Scanner ability. I get an error on the "import java.util.Scanner" line saying "cannot find symbol...

I have a question about album art in windows xp. A lot of my music was taken from backup disks and didn't come with album art, they were burnt under windows me. I've went ahead and searched a P2P network for album art and retrieved most of what I need. The problem I am having is that quite a few...

Greenspan Worries About Economic Health Friday August 26, 1:03 pm ET By Jeannine Aversa, AP Economics Writer Federal Reserve Chairman Greenspan Raises Concerns About Long-Term Health of U.S. Economy JACKSON, Wyo. (AP) -- Creeping trade protectionism and bloated budget deficits pose a...

I'm trying to reinstall windows, but on reboot I can't start from the particular CD-rom (other CD-roms do work on reboot, but I need this one). It says: Boot CD-ROM type: Non-Emulation Booting Press a key if you want to start up your computer from cd-rom... and then it hangs, the cd-rom...

I am trying to reformat my hdd when something weird happened. I have a P4 desktop and I wanted to reinstall everything on there. So I booted from the windows CD and it formatted and installed windows XP sp1... when the computer restarted, it said that some file was missing and it wouldn't start...