Building Definition and 891 Threads

Hello again, Im trying to build a neural network using C++. Has anyone had a go? I think the potential implications are really interesting and would like to hear about how people might have implemented them. Another general one for anyone.

So here is the situation our department seems to face. We are a fairly large public school in the central valley of California. Our department is shrinking and there is little opportunity for students to be competitive for when they apply to phd schools. This summer, a fellow student and I are...

As useful as an EEG machine would be for me, I can't afford to buy one but I'm going to build one in the near future. There is a lot of information on this site http://openeeg.sourceforge.net/doc/ and from what I've read so far, building an EEG machine is no simple matter. Not for the layman...

I recently extracted the control system out of a severely damaged RC aircraft (a very simple kit deal). It's got two servos, and a pretty good motor, which works out perfectly for me! I want to build a new aircraft from scratch using the recovered control system. For the fuselage I'm...

So I understand that the tensor product of two vector spaces constitutes a new vector space. In the case of spin coupling you have some arbitrary vector |x,z> where x represents the spin state of particle 1 and z represents the spin state of particle 2; bot spin states being general 2 element...

Hi there, could someone "please" help me with a Q regarding weight loading of a steel beam. I wish to remove a post over my verandah which would leave a span of 7110mm, The verandah comes out 2.4m, and has steel rafters 1800mm apart with steel roof batterns and will have a corugated iron...

Hello, I would like to start by saying that I know very little about nuclear decay, so please do not flame me if this is a silly question: I am wondering if it is possible to generate enough potential to light an LED indefinitely using pure beta decay. Let's say the circuit consists of a...

Hi myself Johny. My age is 24 years old and recently my weight is 55 KG. So that I want to know that exactly how much weight I want at this age?

hi, i am interested in nuclear physics but i don't really want to delve into the complexity of it, so could someone please give me an idea of the practical approach to making a breeder reactor, i do not intend to build one, i just would like to know how i would do it if did want to build one...

Hello! Well I am in second year Engineering Physics and we're building a robot this summer. We have four students in my team including myself. We're to build a robot that follows a loop of black tape on a track, and race with other robots. I have a few questions: 1. We decided to use...

I need to build a working gyroscope. Where can I find information on how to build one? also what materials to use to build it? Any Ideas?

Homework Statement As our final project, we have been instructed to design a goblet (which will actually be physically prototyped using a 3-D printer) according to the following specifications: 1. The goblet must hold exactly 200 cc. 2. The goblet must be symmetric (a solid of revolution)...

Could anyone explain me what a phase space is and how we can build it?? Thanks in advance.

Homework Statement A winch is positioned on top of a building, a distance 70 m above ground level. A chain of length 95 m and a mass per unit length of 1.2 kg/m hangs from the winch along the side of the building. Find the work done (in Joules) in reeling up 60 m of the chain.Homework...

I´m trying to find approx. numbers or formulas for a submarine like structure to mantain a constant volume. For a given volume, which materials and to what thickness should the container be?

hey ppl, In a nutshell, need to come up with a 10mX2m foot bridge over a river made from steel and concrete also to include foundation design. borehole data are as follows. Depth. Description 0.2M Topsoil 2.60M...

Homework Statement There are two storage rooms, (A) and (B) connected by a single doorway. Only room (B) has an outward vent, so all air exiting the rooms does so through this vent in room (B). The ventilator you will install drives outside air (78% nitrogen) at a certain flow rate through a...

Hey all, I am trying to make a simple remote controlled switch (without any digital IC's) and was wondering if anyone knew of any schematics, etc. Thanks, John

Hi, I am attempting at making a simple device that will run on dc power that just spins a item i place vertically in the air. I am trying to do it without having to by any of the parts being i could just buy a new one for around 250 bucks. My first question is how to you determine the...

Hello, I am brand new to this forum. It looks like there are a lot of people that might be able to help me on this project. I need to build a 4-bit searching circuit. The circuit takes a 4-bit word and searches a 4x15 memory for that word. It will have two modes, a Load Mode, where the words...

[FONT="Comic Sans MS"] [SIZE="5"] :confused: Is time runs faster at the top of a building or at the bottom...?

Is it possible to build an adjustable transformer that can take 110/120 and dial it all the way down to 1 volt? I'd like to build one if possible to aid in physical development so it's very important to be able to take it as low as possible in the beginning. I'd like it to have 2 electrodes as...

O hai. http://laughingsquid.com/the-worlds-largest-lolcat-invisible-bike-mural/ I found this freaking hilarious, even if it is old. And for those of you who don't know what LOLcats are (shame on you!), here's a TVTropes explanation: http://tvtropes.org/pmwiki/pmwiki.php/Main/Lolcats...

Hello. As a memorial I am trying to build a light-sensitive unit that will make an LED continuously glow at night. I want to put this in an extremely remote place and be reasonable confident that it will continue to operate indefinitely. The idea is that once it becomes dark, a photodiode will...

. I tried making a newman motor according to a video on youtube. I have copper wires coiled around a plastic pipe, 200 above and 200 coils below the middle of the plastic pipe. The shaft in between is made of iron and it is quite thick. Now when I connect a 9v battery to the two ends of the...

I'm working on a robot for my final project in class. It's your basic line following deal. It has 5 sensors that face the floor on the front and it just follows a track made of black tape. I'm just going to use this one thread for all my issues. Current issue: I don't get a certain type of...

The project entails the design and simulation of a system to stabilize a building in the event of an earthquake. The idea is to numerically test the response of the system to earthquake conditions and see how it performs. It will also involve varying the relevant parameters to obtain the most...

Hey all. I am building an IR modulator but seem to have a small kink in the design. Here is my schematic: Here is a picture of the oscilloscope, connected between ground and the output of the TL555 timer and the output of the second transistor (the output pulse going into the LED's)...

I was searching about the possibility of building a simple mobile phone, but I found an old topic here indicating that this is pointless and hard. Actually I want to make a mobile phone which only receives the incoming ring and vibrates. I am asking about the possibility of doing this ? It...

Hey guys! Me and all of my friends got this work for a mathematics question. But none of us can figure it out. We think they supplied too little information. We studying Engineering. I hope I posted it in the right place. Homework Statement The base of a building and the base of a...

For class, a partner and myself must build a mousetrap vehicle which travels down a runway (120 inches), executes a 180 degree turn around an obstacle(72 inch maximum width) and travels back past the finish line. http://www.geneng.mtu.edu/olympics/2010/mousecar_competition_b2010.pdf click here...

Homework Statement A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.70 m/s at an angle of 22.0° below the horizontal. It strikes the ground 5.00 s later. Find the height from which the ball was thrown. The Attempt at a Solution i...

I am building a cardboard bridge that is supposed to span 7-9 feet and made of cardboard. I am having trouble however designing the abutments. The bridge will simply be placed on a table (no suspension designs btw) and will have a maximum 10% grade. What will be the best way to design the...

Hey. I am trying to build a circuit which would switch on/off another device. So far I have tried using an IR LED on the controller and with a phototransistor on the load device (which has it's own batteries), but I cannot figure out how to get it to work. I do not need complicated signals...

http://www.machineguardsolutions.com/images/lightcurtain2.jpg A light curtain seems like a basic communication system setup (TX & RX). But what kind of signal are you trying to send and receive? How should the receiving end get processed? How do you deal with crosstalk from using...

I am having trouble understanding a building collapse. According to NIST, on 9/11 WTC7 collapsed after fire weakened its structural steel. They have however admitted that WTC7 fell for 2.25 seconds at free fall. (http://wtc.nist.gov/NCSTAR1/PDF/NCSTAR%201A.pdf) However isn't all the...

Hi, i was just wondering with this question because I'm unsure if I am supposed to add both kinetic and gravitation energy into this answer? thanks. 1 A crane on a building site lifts an 8.00 × 102 kg load from ground level to a vertical height of 90.0 m at a constant speed of 2.00 m s–1...

Building a matrix using "while" loops? (MATLAB) Hello Here is my code: i = 1; j = 1; S = zeros(11,11); while i < 12 while j < 12 S(i,j) = Test1(a(i,j),b(i,j),c(i,j)); j = j + 1; end i = i + 1; end a,b,c are all 11x11 matrices and Test1 is a...

Hello, I was wondering if anyone knew where you could find a good circuit diagram for building your own PSU. I am looking something that would maybe go up to 15 volts or so, just for doing some testing etc at home. I did a quick search here and didn't find anything. Thanks in...

I have recently come up with an idea about trying to build an apparatus to run some gravitational wave experiments. Now I am still a novice so I wrote Professor Scott Hughes about my idea, he provided me with the mathematical equations that basically show the experiment is impossible. I will...

Building a car in AP Physics, Need Suggestions! Homework Statement Hello, I am in need of suggestions on a project that was recently assigned to my AP Physics class. The challenge was to make a "Tank" (any vehicle) that will go down a ramp, shoot a projectile over a 1.5ft wall, and go back up...

I think I saw a documentary on TV a while back about the thought of building a bridge between Alaska and Russia. The largest bridge ever built. Do you think that this could actually be done in terms of modern structural engineering? I would imagine that such a bridge would become quite a...

Hi all, I wanted some advice on my research-advisor. I was fortunate to have enjoyed a nice night in town with my research-advisor and his girlfriend. He insisted on paying for everything, and he did. I was quite grateful, and have been wondering about a way to return the favour, and/or conduct...

Hello! I recently purchased a basic 6-inch Equatorial Reflector telescope. I bought it because I loved doing astronomy with large binoculars, and I assumed the next step was a small reflector telescope. However, I find myself barely using the new scope because the bulky Equatorial mount is...

i have to build a vehicle that can transport a battery 7 meters in a straight line as fast as possible using the potential enerygy of no more than two kilograms falling from a maximum height of 80.0 cm. i want to build this brake: http://www.scioly.org/w/images/1/19/SC-brake2diag.gif...

we have to build vehicle that can transport a d cell battery 7 meters as fast as possible using the potential energy of no more than 2 kilograms falling from 80cm. we want to use this design: http://www.scioly.org/w/images/6/69/SC-brake3diag.gif...

HI, I have builded a tube buggy out of square 1"1/2 x.085 and was told that it was unsafe so I'm looking into it. Was my design unsafe? My question is round stronger then square if so how much? Question 2 dose welding weaken the steel? Question 3 if round is stronger how much stronger is it...

Basically I got in trouble at college for going onto my dorm roof to get my frisbee so what I have to do is write a 3 page paper about what would happen to someone if they fell off of a 4 story building (17 meters tall). Obviously they would die more times than not. But I need to discuss what...

I was just wondering about any equations that would play a part in this situation. Obviously gravity plays a role but like calculating the force you'd hit the ground at like the force in pounds or something anything really is what I need it's just a general question. Preferably a 4 story...

Homework Statement A 120 kg man jumps off of a 5 story building (~15 meters). How much force is acted upon his body once he reaches the bottom? Will he break any bones?Homework Equations X = (1/2)at^2 (since initial displacement and initial velocity are zero) so therefore: a = 2x/t^2 F= ma The...