Engineering

I've a problem here, my boss need me to measure the hardness of a piece of copper strip, but we didn't have any hardness test machine (vickers, durometer, brinell etc) to do that. But we do have a tensile machine. Can i do something with the tensile test to measure hardness? Your help is really appreciated

I've kind of been following this story with a bit of bemusement and surprise, wondering how could this possibly happen? Also wondering if maybe it is another carefully designed ploy to get into their system, perhaps, showing them a form of dummy without any real tech, perhaps, only to unleash another form of trojan on the sly. At first, I read that, without an instruction signal, it was designed to find a suitable landing area to land. Today, I read a report on Fox which stated other likely scenarios instead. It does seem likely that they would have a better contingency plan than to deliver it on a silver platter if only the signal is lost. Which leads me to my next…

I'm wondering if it's possible to make LEDs, displays and semiconductors using a big ion deposition machine. The machine would be like a very slow and doubtless huge 'replicator' that can manufacture a wide variety of things by spray-painting atoms onto a substrate. Ideally the device would also dissociate and purify the silicon, metals and other substances as they are used, like a mass spectrometer; it would not have to be frequently dismantled for cleaning or maintenance (unlike a mass spectrometer); and it would not contain anything extraordinarily rare or costly. If anyone takes an interest, how big would such a machine have to be for a yield of, say, a gram of pr…

This one's neat, if you wait a sec...well, you, actually about 30 of them, if you'd like to kick it ahead... Godzilla meets Japan, also cool, awfully grainy & old now but still worth a quick viewing ... A neat hologram demo, also old but interesting... You'll also want to scroll ahead here, it's a yawner 'til about 2:15 into it.

IMHO, the Maglev train using computers to guide a train by the principles of repulsion and attraction is a superb example of modern engineering overcoming a problem. The problem is to move populations around as quickly safely, and without hassle to different conurbations, either within a country or internationally. The priciples are demonstrated below: and How Maglev trains work However, it strikes me, as a member of the energy consuming public, that this seems to use a lot of electricity and raw materials. Of more concern to me is how much energy the trains will drain from the National Grid, and how this compares to the amount of fossil fuels u…

agree or disagree

Ok so here is my understanding of an EMP: A surge of electrons (I know it's much more complicated, but this is the part I want to focus on) in an electromagnetic field. So, I have a few questions. First off, am I right about the EMP being (at the most basic level) a huge surge of electrons through the air? Also, if this is true, could this electron surge be used to power a dievice wirelessly? Also, how can I calculate the power of an electromagnetic surge(EMS) in Amps/Volts/anything than can be converted into amps/volts? One last question (slightly less relevant): How can I use a magnet to increase the power of my EMF/EMP/EMS?

Hey guys. I've been asked to design a steam power plant for a college assignment. I understand most of what I'm doing, but I was wondering what are general values for the minimum and maximum pressures and temperatures which can be handled by a typical boiler, condenser and turbine? Would be useful when choosing values. Thanks.

Ok, so I've finished all of my calculations, written most of my lab report and am finally at the discussion stage...but I can't find any typical efficiency values for concentric heat exchangers to compare my results with. HELP! If anyone knows where I can find these let me know, my report is due on Tuesday (29/11/11). Cheers!

I'm thinking of making a low powered coil gun, but I don't have a lot of experience with electricity and electromagnets, and I have a few concerns about the following setup. For the thing that turns the coil on and off, I was wondering if using the projectile as a bridge between two contacts in the barrel would work. The idea is that when the projectile reaches the two contacts, it would complete a circuit that turns on the power supply for the next coil, and also turns off the previous coil if there is one. So for a single stage gun there would be two sets of contacts, the ones that turn the coil on, and the ones that turn it off. Do you think this would work, or…

The most energy efficient bulb.... is there anything more energy efficient than an LED light bulb...aka... more lumens per watt http://www.designrecycleinc.com/led%20comp%20chart.html or a better type of LED that creates more than 118 lumens per watt?

"In depression, glucorticoids are elevated, life seems hopeless, and rats think their bar opens shock circuits. If one is using effort on bad behavior, its often best to remove its substrate from what enthralls ones focus. Freud posited that depression is aggression turned inward, suggesting persons adopt annoying habits of characters no longer available to them; but it seems more like the rat who thinks it can control its suffering. Persistent delusion begins to harm more than help - although its feeling of control at first damps its stress response, it eventually gets more stressed than rats who never had control. Sapolsky, Robert. <i>Why Zebras Do…

How the inner wheel angle is more than outer wheel angle? is it natural ie if i design a steering linkages then it will operate like this or we have to do something to make inner wheel angle more??? how to find the inner wheel angle ???

Greetings all, Research, and development stages. The idea of using solar power has been determined to be a viable resource. There is a lack of information of engineering based concepts on the subject. What I am suggesting is, engineering, and development. Is there any information you can provide, listing the best solar reflector designs ? I have not seen enough research leading to development, or concepts that increase the output of reflectors.. Is there any one working in the field who has engineered a solar reflector? "The smaller the mirrors the greater the reflective power." Sincerely, super-ball.

The kind of thingy that stimulates inventiveness, curiosity, and more... http://www.sciencema...nt/334/6058/962 Science Magazine is pay-for-view, alas, and reports elsewhere are very incomplete: http://latimesblogs....?track=lat-pick From what I read elsewhere: - This is a lattice of very small metallic tubes, made as a single part - Newspapers call it a material, which it's not in a strict sense - A frame of rods is first obtained, I understand by many crossed light rays that polymerize liquid MMA into solid PMMA - Catalytic nickel is deposited on the solid frame after liquid MMA is flown away - And the solid MMA frame is "somehow" removed from within the nic…

Hi, im new here. i have a question. Is there a fabric or metal that will Contract and Expand with -/+ piezoelectric E? or normal DC current? I am looking at the possibility of replicating fish maneuvering ability to use for marine applications. Possible? Thanks

HEY I GOING TO PARTICIPATE IN SUPRA 2012(http://suprasaeindia.org/supra_Saeindia.asp) I NEED TO KNOW SOME IDEAS ABT HOW TO DESIGN THE STEERING SYSTEM FOR THAT CAR ????

Hello you all! A nice Solar power plant has just been inaugurated in southern Spain. It's called Gemasolar, efficient browsing keyword: http://www.torresole...asolar-plant/en http://www.nrel.gov/...fm/projectID=40 (http www) youtube.com/watch?v=GhV2LT8KVgA http://www.lemonde.f...#ens_id=1271383 (French) Why the provocative title "the Sensible Way"? - It converts Sunlight to electricity through heat. The huge light collection area is made of "cheap" mirrors, not of expensive Solar cells. - A turbine and alternator can have 40% efficiency, as opposed to <10% for affordable Solar cells. - Heat is stored in a cheap bulk material to produce electricity during…

Do I have to hydrophillic surface treantment when I use PEDOT:PSS for solar cell? Can I treat by hydrophobic? The substrate is not ITO. It can become oxidation.

Hello! I have a question. Do I have to deposite the chromium on the glass for silver deposition? Chromium is too dark to make device such as OLED or solar cell. I want to increase transmittance... so............................ Do you have any idea about silver deposition without chromium on the glass? (Lilke surface treatment using solution.) Thank you for your favor

Hey, I am currently working on a research project and we are trying to solve future urban transport problems; i.e. more people living in cities will cause enormous traffic congestion. We aim at finding new ways of solving transport or even invent new futuristic vehicles. If you think of cities in 2050, there will be an incredible amount of information sharing which can be used for a semantic system to predict traffic behaviour and flows so as to avoid traffic congestion. This could be used for e.g. robotic cars. Furthermore, cars as they are known at the moment probably will not exist anymore but other vehicles will be used to enable flexible mobility in cities. In thi…

Hey everyone. I've been working for quite a while on this one. I've been trying to make a VT100 terminal emulator through serial port (RS232 standard) using Easy8051A development board. I've written down the entire code for writing from hyperterminial (yeah, I nedded XP for that) to a 2x16 LCD (8-bit mode) and also for writing from the board to hyperterminal, but I got stuck trying to bring the two together. I know I must somehow use serial interrupts to check whether a key has been pressed or not but I can't just quite figure it out. I'll post the code down here, just in case anyone has any bit of idea of how could I proceed. This is the code to write to the LC…

(Apologies if this is not quite the correct category, I couldn't really find any single category in which to discuss this. The primary query is at least a matter of engineering more than anything else.) Does anyone know of any figures for the energy return on invested of the nascent organic PV technology? Or perhaps know of anywhere I could find figures with which to calculate this. I'm given to understand that the state of the art has rather fantastic payback time (measured in months rather than years), but rather short total lifetime. With this being the case I guess one would have to consider transportation/mounting/wiring/installation/etc costs in addition t…

Hello nice people! From time to time, I'd like to compute the minimum force that buckles a truss, and hand computations get quickly too complicated. So: could you recommend me a piece of software for that? What I need: - Quickly learned and installed, for Windows, free of nearly (I know that's incompatible) - Something like 30 nodes and 60 beams - Input as a text file would be just fine Thank you!

I can't find anywhere on the internet where they describe in detail how bullet proof glass is cut/machined .. specifically a diameter 30mm hole through a 30mm thick glass? any help greatly appreciated.