Does anyone know of a good (and relatively cheap) solution for using PCI cards in PCIe slots?
We have several PCI cards (DAQs, controllers etc) that we can't use on our newer computers since they only have one PCI slot (which is usually already in use). Note that these cards are quite...
Can someone recommend a good book about microwave (RF) systems (From 1 to 20 GHz)?
There are plenty of books about communication systems and MMIC designs etc; but I am looking for a book that deals with the things "in between" these two extremes.
Specifically I would like to find a book...
I spend a lot of time at work doing numerical simulations using Matlab.
Matlab does a pretty good job when it comes to visualizing 2D data (at least in the more recent versions) but at the moment I am working on something where I need to both visualize AND animate 3D data (I am looking at the...
Interesting article over at the Scientific American website.
New, cheap, solar cell with an efficiency of around 40% :thumbsup:
It seems mass production will start pretty soon, the company developing the technology is owned by Boeing so they should have the plenty of resources available.
I wonder if anyone can suggest a good company where we can order some simple microwave circuits?
We essentially need a coplanar waveguide fabricated in gold on a alumina (Al2O3) substrate, i.e. a fairly simple thing.
The problem is that we only need a few "boards" so what I am looking for...
I am currenty designing a circuit which uses a 74LS07 hex buffer/driver in the output stage. I would like to be to be able connect this output to among other things a counter with a 50 ohm input impedance using ordinary 50 ohm coax, hence preferably I would like to have 50 ohm output impedance...
Does anyone know how to calculate the inductance per unit length of a coplanar waveguide(CPW)?
There is a lof of information available about how to calculate the impedance but I can't find anything about the other parameters.
I know that I probably need to use numerical methods if I want...
I recently read Phillip Balls excellent book "Critical Mass" where he describes a number of modes that are used in social physics. After reading the book I started thinking about a question that I never managed to answer many years ago when I did a small school project about celluar automata (I...
Has anyone tried running Matlab on a dual core processor?
I know I can't expect much better performance since Matlab is basically single-threaded (yes, I know it is officially multi threaded) but I would like to be able to use my computer for other things while Matlab is running a calculation...
Does anyone know if there are any plans for a MPI imlementation that supports dual-core processors?
And if so, will the two cores "behave" as two processors (from the MPI point of view that is, i.e. can I run one process on each core)?
Or maybe I should start by asking if such an...
Take a look at this link, on the page you will see a ceramic membrane which is used to make membranes for speaker cones.
I work with ceramic thin films and am familiar with different kinds of PVD, but that is on substrates; how do you make a membrane?
Noe also that there are two layers...
We recently go a new server running Win 2003 Server which is used as a printer server (5 printers and about 70 computers). Because we are not using AD there is no domain-login which means that all permissions are set locally (yes, I know this is insecure, stupid etc but we are part of a...
I own an IPAQ which I really like because I can carry it around in my pocket. The only problem is that the screen is too small to be really usefull for things like word processing or surfing the web.
I also sometimes travel with a laptop, it is not very heavy but I need to carry it in a bag...
About a week ago I built a new system at work. Antec chassi, Athlon 64 3400+ BOXED and a MSI k8T Neo motherboard.
I had no problems building it and it has worked without problems for the pas week. The temperatures were also fine.
However, today I wanted to use the computer and suddenly...
This is work-related so normaly I would not ask a question like this here, but I since I can't seem to find what I am looking for and this is an EE question...
I am using a small loop-antenna (with a diameter of about 1 cm) made from a piece of standard semi-rigid coax, I have shaped the...
Everyone knows that rubber "dries" after a few years and that this can cause problems.
On your average hifi-forum you will find lots of "tricks" that supposedly can help you preserve the rubber around the speaker cone.
After reading one such thread (with recommendations ranging from silicone...
A while back I talking with some friends about just how difficult it would be to design a nuke.
I was arguing that if we limit ourself to a 15-20 kT uranium bomb using a canon to shoot the two pieces of the core together (similar to the Hiroshima-bomb) it is a fairly simple design.
A...
I have been trying to understand the difference between an audio A/D-converter and a "normal" ADC. For example, you can buy a
24-bit 192 kHz audio converter from Texas Instruments but the fastest "normal" 24-bit ADC available from them has a maximum sampling rate of 40 kHz (and then the...
Check out this link
http://www.idquantique.com/qkd.html
I should point out that this is not a joke. It is real commercial product. The price is suppose to be of the order $100 000/unit so start saving...
There is also an american company, Magiq Technologies, that will start selling this type...
I have a couple of questions regarding AMD processors (duron,athlon etc) and floating point calculations. I know that CPUs from AMD used to be faster when handling float (the datatype) than Intel, I if remember correctly is was because AMD needed fewer clockcycles to handle 32-bit floats or...
I have seen some web-sites where people have OC 2.2 GHz processors to more than 3.5 GHz by cooling the processor with liquid nitrogen.
I was just wondering if someone had tried making a more permanent super-cooled setup by using for example a cryo-cooler? It would be expensive but it should be...
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