Engineering

3D printing is an awesome modern technology, currently most used to create small figures or miniature designs. Since it can only construct relatively simple structures, it's understandable why you can't 3D print cars or electronics or anything complex. Still there is one thing I can imagine 3D printing doing today, granted a large enough printer was to become available: Creating buildings. This might be possible because first of all, buildings are made out of few materials... typically just steel plus cement (reinforced concrete), both of which can be molded in place. And second, they are very simple designs... just a few wall patterns repeated across floors, with hol…

It's almost that simple. Picture a self inflating balloon made of cellophane. I have a chemistry question regarding some very basic principles. The materials involved: cellophane, acetic acid (6% vinegar), and sodium bicarbonate. The goal: For a 6 liter cellophane sack (balloon) to be filled using the CO2 produced from the reaction of acetic acid with sodium bicarbonate. The entire process must contained within the cellophane sack. Diluted acetic acid stored in an internal bladder within the cellophane sack is physically ruptured to expose it to the sodium bicarbonate, also contained with the sack. The entire process must be relatively safe... such as only minor …

Hi everyone! I am a student of economics in vienna and currently working on a project together with CERN, in which we want to find new (civil) applications for a new sensor, they have invented. In a first step we want to find out the benefits this new sensor delivers. Just imagine a CMOS sensor with a thicker depletion zone than ordinary CMOS sensors (as used in digital cameras), which makes it capable of detecting X-ray, infrared and even single particles (the main feature, why they developed it). It has also increased radiation hardness and can be used in magnetic fields and in vacuum. Can you think of any benefits this new technology could deliver to users? (don't h…

I was asked to explain this comment I made in another thread, but since discussion would be off topic there I have started this one. I'm sure I have missed many obvious thoughts so comments from Engineers would be welcome. Paradoxically engineers use centre lines both because something balances about the centre line and because things are irregular about the centre line and for other practical reasons as well. Working through my examples 1) If we drill a hole or bang a nail in we want to mark the spot where to place the point of our drill or nail. This is at the intersection of two centre lines. 2) So let us say we are going to drill these holes to bor…

Greetings everyone. If you happen to be reading this thread, does anyone of you have any ideas on building an Iron Man Suit? The suit should include: -Ventilation -Propulsion -Energy Source -Information Access -Others you can think of I'm doing a compilation of ideas, and might make one if possible Your ideas can be wacky if they want to be, but preferably following the laws of current scientific theory. :3 Thanks for your help ^^

Would be great to find a member that has professionally studied about these devices and can clear myths found everywhere including the web. Or that is not a myth. Excessive fluid level in an automatic transmission is warned against. (Oil in engines too, but I understand why in them) What parts become damaged ? (if damage is the concern) Is there symptoms of overfilled ? If you share the commonly found opinion that overfilling will foam the fluid; where in the transmission, how, why is foaming supposed to form ? Wouldn't 'foaming' happen if there is too little fluid instead, and the pump is sucking some air from the pan ? -That would be the opposite of overfill…

I have been trying to determine(for a game I am designing) what fuels and engines would a technologically advanced interstellar species most commonly use for space travel assuming they want as much energy output as possible for the smallest volume and mass possible. It seems as far as fuel goes hydrogen is the only combustible fuel that makes sense, other then that they might use antimatter, fission and fusion. Are there any other forms they might want to use and why?

Israeli Missile Defense System Intercepts Overwhelming Number Of Hamas Rockets By Jeff Stone@JeffStone500j.stone@ibtimes.com on July 09 2014 3:21 PM Though Hamas fighters have fired hundreds of rockets into Israel in recent days, the onslaught has had minimal impact with no reported injuries, demonstrating that the tiny country can protect its citizens with one of the most futuristic and effective missile defense systems in the world: the Iron Dome. http://www.ibtimes.com/what-iron-dome-israeli-missile-defense-system-intercepts-overwhelming-number-hamas-rockets-1623606 Looks like hamas rockets are not as deadly as Israel says they are.

Hi. Do bimetallic junctions with no electrolyte at all, and both at same temperature (no thermoelectrics related) produce a minute amount of voltage ? As in explosive bonding, electroplating, sputtering or other processes, where two dissimilar metals are intimately joined.

What are Quantum Dots and how we can use it/imply it in Electrical and Electronic systems

Has anyone heard about explosive devices that cannot be detected by a magnetometer? What can we do about that? It could become impossible to detect explosives worn (or surgically implanted) in suicide bombers. Or is there a way to detect them? The political implications are enormous, we would finally become a "police state" thanks to some whacko jihadis with undetectible bombs. BTW, on this subject, see the recently aired video called "Terror at the Mall" about the Westgate Mall attack in Nairobi by 4 Al Shabaab dim-witts, ranging in age from 19 to 23. There were many mall cameras following the action. Interesting to see what we may be up against. Here in …

W.A.R --- Wandering Autonomous robot is a socially interactive robot which shows different behaviours under different circumstances. The main behaviour of this robot are: * Obstacle avoidance * Light following * Food seeking (Light source in this case) * Prey & Predator behaviour * S.O.C - State of charge monitoring * Charging - through solar panel 1--- So here it is how its gonna work, initially when u gonna switch on this robot it will scan and mapp the arena with help of SONAR and servo then it starts wandering in the arena randomly while avoiding obstacles and walls of the arena. One good thing about this robot is that its very fast…

I am new to the post. I need help with a experimental problem. I am testing to see if radiation effects the emission from luminophores on sample substrates. I have very limited number of samples to test. My first problem was a measurement accuracy issue. The emission measurement device is notoriously sensitive to the slightest changes. In order to reduce the variation between measures, I take 16 measurements of each sample at each test point. Then I average the 16 measurements. This method has reduced my error by square root of 16 thus much more accurate results (usually ~2% error which is very accurate for my case). After implementing this solution, my next issue is to "…

By using a motorcycle engine of any kind,you will be able to make your own car.first u will need to expertise on how your frame will actually be. this is upto you to decide.you can contact your homeplace mechanics in cars and motorcycles and you will be helped.the main components of this car are the front and behind suspention. after your frame has been made ,make sure you place the motorcycle engine on the behind suspension. connect the gears to your frontwheel suspention so that you can change gears easily. Then you should be able to place the motorcycle tyres(4) and be able to design how they will work hand in hand with both suspensions. GOODLUCK ITS AQUESTION OF CREAT…

This engine with three spark plugs and five cylinders may end up in certain types of machines that need small efficient powerful engines. http://www.gizmag.com/duke-engines-axial/33631/

Hello everyone, I am currently searching for a bachelor degree in mechanical engineering in Europe, taught in english, and I need this uni to have freshman courses first since I am an AP(Advanced Placement) student and am required to take freshman before beginning my Bachelor's. I went to QS world mechanical eng uni ranking, excluding the UK, I found only 3 uni in Europe that teaches in english(top 150). Unfortunately, none of themhas freshman. I am seeking your generous help as I am left with no possibilities that meet my requirements.. Thank you very much.

Is it possible to replace a camera's normal sensor with an infrared one?If yes,what other modifications does it need to make it infrared?The lenses which are normally made of glass which doesn't let IR pass through?Is it necessary to modify the microprocessor to or change it?Can you explain why if this can't be done?

Webinar on SimCafe Portal to Learn Simulation Learn how students and professors can use SimCafe portal created by Cornell for teaching and learning CFD & FEA simulation: http://view.s4.exacttarget.com/?j=fe7d1d74726c02757d&m=fe9815707067037d72&ls=fdfb1772766c057f76147873&l=fef01c757d6101&s=fe2c11737761057b731576&jb=ffce15&ju=

Hey...just a few moments back I heard(*lolz...not for the first time)the sound produced by the fan when its rotating..so anybody who could explain me the reason of the vibration sort of sound....? Thx in advance I wrote the query in a wrong manner....dont reply and sry:(

Hi all. Along my life, I have seen some variety of manufacturing machinery. Never had the luck to see how mechanical wristwatch parts are made. Not even pictures. And they have been built since at least 1700. How were the parts made then ? The tooling is a mystery to me. And beyond this, who makes and how is the machinery to make wristwatch parts ? The entire factory fits in a suitcase, right ? There is a hidden universe there. What do you know about ?

Engineers in academia seem to do very similar research when compared to scientists (albeit a bit more on the application side), and I'm sure they apply the scientific method more that the engineering design process when doing research. So, are engineers who do such type of research considered as scientists?

Hello everybody, I need to decide what is the university that is the most successful and popular in research on the energy field. I will then major in mechanical engineering there and apply for an energy- related job.Every ranking site that I visit provides me with different information. I am not sure which one to actually base my decision on. Thank you very much in advance.

Scientists are trying to figure out ways to save earth and to move to other planets if earth or earths atmosphere/orbit is ruined. If the magnetic field is created by our core we need to core to survive, we also are effected by the sun and the moon. The moon effects the currents and the sun gives us heat that we need. Our atmosphere is what protects us from debree and getting too much heat from the sun. Beneath the atmosphere is weather. Weather is effected by a number of things including what lays under our crust. We cant remove the sun, we cant remove the magnetic field, you can always stop things like earthquakes. So why would we want to move to a planet that probably …

Hi. I would like to ask about applications of 70 GHz radio in different fields, except cellular comm that already known. Maybe someone can help me P.S. 70 GHz (E-band) communication system able to work with speed up to 3 Gbit/s on distance about 5 miles (8 km).

Many low income African and Asian countries don't have any Fossil Fuel reserves and they import Coal and petroleum for electricity generation and it's really affect their economy.but many of these countries have huge marginal land it's suitable for bioenergy crops. Growing some fast growing drought tolerant Grass species and built some biomass burning power plant will give them some relief.many tropical grass species can give high dry matter harvest and can grown on dry lands ( Napier grass can give up to 75 MT dry matter per hectare per year but can obviously we can get at least 15-20 Mt DM on dry land ) some fast growing tree species also can used for biomass bu…