Engineering

Hi. The hydraulic fluid from a pump outlet can compress air to easily 2000psi if fed to an air containing vessel. Is there such animal in the industry ? -Yes, it is easier to just use an air compressor method-

Hi, i am a junior student doing a research to take part in a world competition, a very important chapter of my research paper depends on gases separation to benefit from each one at a time, i searched about gases separation techniques but i found most of them very expensive and complex. Lately, i found out a method depends on an electronic device that separates gases according to their different densities under high temperature amounts to 1200 C in a closed system. Please could any one recommend me a book/reference/research paper/any thing explain me this technique or any thing explains gases separation by density in general because i strongly need it. Thanks in advan…

Hi everybody, I would appreciate your thoughts regarding a newly developed security system for detecting damages to an object. It uses an optical multi-layer system to identify security breaches. For details check out: http://www.avalanche-research.de/projects/5765b30a11af4c0300a0f814 Best regards

Ultra deep hydroelectric/geothermal power plant By Physicist Wolfhart Willimczik ABSTRACT This invention consists mainly of a long sloped tunnel, a deep hydroelectric/geothermal power plant and hot rocks transforming water into steam. Advanced tunnelling machines are able to reach lengths and depths never possible before with the old drilling method. The drop height of the water for the hydroelectric power plan is for instance over 10 km and the gained water pressure over 1000bar feeding special high pressure water turbines or big hydraulic water motors driving again generators. After passing the water turbines the water is pressed with a rest pressure of …

It has been suggested that a strong enough cable (carbon nanotubes?)should enable a space elevator to be built. However, surely, as the cable is lowered from space there would be a static build up so great that when it discharges close to the earth, it would be like an atom bomb? Also the cable would be like a super conductor and transfer earths heat into space. Another ice age anyone?

Dear community, Please let me know if this is the wrong category. I have been working on a device enabling to characterize the Max Power Point (MPP) and Fill Factor (FF) of solar cells by applying various loads to a solar cell and extracting the current-voltage curve. Now it is time for the experiment itself. The idea for the experiment is to determine the FF of, say 10 cells under real sun irradiation, under sunny conditions. The parameter which can (strongly?) influence the results is that the conditions of real sunlight irradiation are highly unsteady: the proportion of diffuse and direct irradiation can vary significantly within minutes or seconds, influenced even …

Ok, so I did some reading on the fourms before posting this and uncovered an old thread regarding air gear. This caught my interest because as a part of my Network Administration classes I'm taking Human Hardware Interaction as an elective. As a thought for the project I was thinking about trying to make my own set of Air Gear. Now, I know that someone pointed out the video "rocket skates" on youtube in the post I found. However, to simplify the use of the air gear I was thinking that I would somehow fabricate a sensor pad to detect the pressure of how a person uses the inline skates. As an example I will use the way I skate; when applying pressure to move forward I…

Hello, I am part of a small team designing a biologically-inspired underwater robot. The idea is that instead of having a traditional propeller design for the robot, it will instead propel itself in a manner similar to a cuttlefish (with fins on either side pushing it forward). However, before building a full prototype, I would like to know how well my robot will be able to propel itself in the water. My question is this: Is there any way I can accurately predict the amount of force my robot will be able to produce, either through simulation software or calculations? Any help or information on the subject will be greatly appreciated. Thank you, Mark A

PLEASE! what do the E, M, A's and ponying vectors look like when a permanent magnetic dipole has one half of its body (pole) charged + like "N & +" and the other half "S & -"? and then importantly whats the other orientation (N-)&(S+) behave like.. (just to make sure im not missing anything;) and what happens to a dipoles flux when its placed in the center of a large permanent toroidal magnet.. does the A field curl all its flux? thanks!

The more complex something gets it seems to me the more likely things are to go wrong. I once heard that the Space shuttle was the most complex machine made by man. But if we had the technology could we build something as complex as The Star Ship Enterprise? I was looking over a cut away picture and it occurred to me that there might be a real limit on how complex and reliable a machine can be... This video is very pretty, and makes my Treker Heart jump with Joy but could such a complex machine really be made?

So I was researching something for class involving air as a fuel source. I then read up on multiple things and had an idea for a car. What if: You extracted the nitrogen from the air, made it into liquid nitrogen, and then used it to power a car using this: http://www.planetforward.org/media/tv-segments/can-liquid-nitrogen-be-used-to-fuel-cars. Don't mind this formatting, it's quite late at night and I'm too tired to care.

Me and my partner received an extremely important assignment that will occupy our entire semester, but we don´t have no idea how to start it. Basically, we were asked to find an article regarding physiological processes so that we can model it using Matlab, but we can´t seem to find any article that includes graphs, differential equations, with no partial derivatives. Any help on finding an article meeting this requirements would be greatly appreciated.

I am cutting corners again. I'm building a single stage rectifier 15kv in 30kv out. I don't have the budget for HV diodes so I connect 20 1000v diodes end to end (7ft long) for each diode in my rectifier. Seems to work. I haven't measured with a divider and a voltmeter but the gap discharge measures about 1.75cm. A little wider than my calculated Paschen estimates, possibly because of a Corona effect. Anything I should be conscious of or worried about as I continue? I plan on adding more stages and I'm curious if I'll get more waste in later stages using this diode method?

Hello, I was wondering if someone could help me diagnose a problem with a 220V, 1000 VA automatic voltage stabilizer/regulator. It's a relay-type, containing 5 relays. Usually, when I plug it in with no load, one relay (or more?) starts clicking non-stop, while the output stays steady at zero volts. Sometimes, the clicking stops after a few seconds, with the output still being 0V. Very occasionally, the unit will work properly when I plug it in and load it up with a floor fan, maybe ~40W (I haven't tried anything heavier on these extremely rare occasions). Any ideas for me to try out? I would say that I have maybe an intermediate knowledge and ability when it come…

Hi there, first time posting. When using an infrared camera on a corroded (heated to 100 degrees) steel beam with corrosion pits, the image shows a minor difference in temperature between corroded areas and non corroded areas. The rust that developed was removed before the experiment. I wanted to know the theory behind why corroded areas of steel show different thermal properties. any ideas?

Hi, I am trying to estimate the flow rate of a closed loop hydraulic system. I know the pump speed, static pressure and pump pressure/flow curve in set rpm. I assume that the liquid is water. Is this valid method to estimate the flow rate? If i can measure the pressure in the pipe with pressure gauge i would convert that to head and compare it to the pump head/flow curve? For example: Pressure in pipe(measured with pressure gauge):3 bar converts to 30,6 m of head. total head would be 30,6m ? Now if i read the flow rate from pump curve i should get some kind of estimate of the flow rate?

Hi , The Journals which were mentioned in the past occasions are implied I am adding a sample of my hand drawing(s) ,but this is not professional ,this is a version of low quality and simple. Regards blue

in pure mathematics we commonly use >3D spaces. there will be many many types which are formulated. but I do not know whether we use any of them as an actual usage in life of science. I see at this document https://en.wikipedia.org/wiki/Hilbert_space hilbert spaces are being used at physics discipline and/or electric electronic engineering. I request anyone to provide any sample of direct usage of >3D space(s) as evidence if there exists or how its usage is. (note only formulizations are not acceptable, usage is required.)

I have been pondering the idea of trying to create a hydrogen gas combustion engine for a while. Using electrolysis to split hydrogen and oxygen to use water to fuel the engine. However, I do not have the automotive back ground or lots of experience as I am still a undergraduate. Creating stacked water and purification, the pressure and seals needed to inject the gas into the engine as well as other process I have looked into but have no way to test. If anyone has any details to add so I can add to my notes or help test. It would be amazing. Thank you for reading

So the last 3 years I've had this really intricate design of a "waste-to-energy" generator set up that hasn't been done before. It's still a theoretical idea, so it's not a "proven" and "efficient" machine. I'm lost on where to go with my next step: 1.) Should I try and build a small model, and see if it works? If it does work, then what? 2.) Should I pitch it to "someone" in the energy business? A guy with alot of capital? An old professor friend? 3.) Should I write a whole thesis on it? Then present it? Would I be taken seriously? I'm very lost on the whole process, especially on a project as big as a WTE generator. If you really believe its far too big …

What permits the max power generation of a dc motor? Is it the max rpm's it can have? The length of copper wire in the motor? The strength of the magnet? ~EE

Dear all, I have an amusing experiment with my smart phone charger. That is, after charging it fully, I connect its input and output toghether, and get surprise result. Could you see in my youtube clip and give your explanation here url deleted Thanks Thinh Nghiem

How can i hack light bulbs so i can make the lights flicker? I want someone i have under surveillance to know how closely i'm watching them, e.g, when they're reading a book and they come to a sentence that could allude to some episode of their life, icould flicker the lights so they know i'm reading the book along with them. Or those elctric heaters that click as they change temperature, how do ihack the electricity supply to one of those? i would i have to rig the room specially?

Hi I would apply for a conference to present my project (but I will be presenter). and request from someones who have experiences for presentation of conference. 1) may I apply by Journals ? (I saw nature and Science AAAS have conferences ,but I did not survey information yet.) 2) if so, What options do journals provide? (for instance ,do journals provide us waiving costs such as tickets of journey , accomodation, visa expenses and process . 3) will that association who I would give conference by its suopport ,want me to provide a determined TOEFL score? if so ,how amount of score is being asked generally? or what other options about this? 4) this will be present…

I'm looking for a lubricant for my bike chain that will dry out but can resist rain for longer than the ones usually available for bikes. Wet bike chain lubes that do resist rain attract dust in dry weather and soon get clogged up and dirty to handle. Normal chain oils are just a nightmare for attracting dirt in any conditions; specialist bike chain wet lubes aren't quite as wet as normal oils. I'm just wondering if anyone knows of a lube, maybe used in some other discipline, that may meet my requirements. For clarity: A 'wet' lube is for wet weather because it resists rain. It is slightly sticky, but not wet itself. A 'dry' lube is for dry weather and is not sti…