Design Definition and 1000 Threads

Forum, I am an engineering student from Melbourne Australia and I have a simple question related to a literature research project I'm currently undertaking, hopefully someone can help me out. Which engineering or safety standards would a design for a CT or fluoroscopy system, more...

Hello all, I'm an electrical engineering student searching for some advice regarding a mechanical engineering class. I have to take at least one upper level engineering class that's not electrical for my degree and I would prefer to take an ME class to fulfill that requirement. While browsing my...

University physics with lab general chemistry 2 with lab Design class linear Algebra Culculs 2. Does this look like an overload? At times it feels like it is and at times it feels like it can be done. the mechanics course and the general chemistry course both come with labs which is the...

It may be impossible. I was under the impression that phones are designed in such weird ways to try to pack as much stuff into the given volume as possible. But, that could just as possibly be an excuse for not having replaceable/upgradable parts and thus forcing new purchases. Idk. If you like...

i am a beginner and i am learning cmos design technique .. i found this layout (attached) and i am not sure how to decompose and understand it - like what function is it implementing and how.. if anyone can help -----

After reading an article a few of you may have read before, Link: http://www.metropolismag.com/October-2009/The-Making-of-a-Design-Thinker/ There are a few questions I am curious about. Design is not only the creation of prototypes for different machines/parts etc. But it can also be...

Hi All, I am designing a hollow rotating drum equipment which will be filled with specialized media for wastewater purification. I need help to design the shaft diameter for the entire assembly. The Drum will be hollow with a diameter of 1.77 meter and length of 2.5 filled with some kind of...

mechanical design -- cam timing chain versus gear-driven hey all, I am a mech-e student, but I am still in the infancy of my degree, so I haven't really had any courses pertaining to this sort of thing, but having work with cars for a number of years, and having what I consider a strong...

Optimal design, "water-wing" - single oar propulsion Good evening, and hello to you all. As you can see I'm new here, so please go easy on me. A while ago I got to learn about the single oar propulsion system used in southeast Asia. The way I see it this is a principle with loads of...

I am redeveloping a product that literally billions of people use, from every day to at least once a month. I need some help designing the power portion, as I am not an engineer. I am planning on using the GTL ICR18650 3.7V 3000 mAh Lithium Battery because it provides the power needed, as...

Hello I'm a student and I have project making a harvesting tool which need barrel cam I need force to cut trunk of coconut tree (I don't know it in english, what I mean is the hard part of coconut leaf) I'm a bit confuse here from Robert L Norton book Cam Design and Manufacturing...

Buck Converter Design for PMDC Motor Introductory Notes: The design article followed in this post can be found here: http://my.ece.ucsb.edu/York/Bobsclass/194/References/NonIsolated/Buck/Buck%20Converter%20Design%20Demystified%20606PET25.pdf This circuit will be used for a motor controller...

I want to understand the difference between Completely Randomized Design and Randomized Complete Block Design. Say for this example how we can categorize? An experiment is conducted to compare the starting salaries of male and female college graduates who find jobs. Pairs are formed by...

Design a railway cistern for 120,000 kg of Liquid. It has to be a cylindrical shell on two supports. The cistern is 18 m long 3 m in diameter (inner). It is made of steel with the yield strength of SY= 240MPa. Safety factor of FY= 1.9; Total corrosion allowance, c= 3.0 mm; Welded joint...

Hello I am trying to put together a system - think of it as a mini oven that reaches temperatures of no higher than about 75-80 degrees C but normally up to about 50 degrees. Initially, I'm trying to find out what power would be required to warm a space up to that temperature. I started...

i'm in the conceptual design stage of my e-cycle. my tech reqs : 1. it should have a max speed of atleast 40 kmph. 2. gross weight = 120 kg 3. min range 30 km. Please help me with the following design question. how to estimate the motor & battery power requirements ?

Hello everyone! Could you please explain to me what design stages/phases exist? And in what order are they placed? Is it: - Conceptual Design - Preliminary Design - Final Deign What is "detail design" then and how is it different from the Final Design? After googling, I've got a lot...

Hello everyone Exam tomorrow on thermodynmaics and can only find one advantage for the NTU method of design over the LMTD method which is: The NTU method does not rely on using an numerical iterative solution to find the outlet temperatures of the heat exchanger, which would be the case if...

Hello, We are a solar energy solutions provider and we are looking to explore CSP plants at smaller scales. I would like to understand the design better. Basically a CSP consists of: 1) steam turbine 2) solar energy collectors (mirrors) 3) water container (boiler) I would like to...

Hello, I wish to design the matrix P such that it satisfies the following: P^TQP=Q^T where all matrices are N-by-N. Is it possible? Thanks

Good day! I don't know if they are called Structural design philosophy but, can anyone enumerate(if the list is incomplete) and differentiate the : 1. Ultimate Strength Design 2. Working Stress Design 3. Limit State Design 4. Allowable Stress Design 5. Others (If there are) Help...

Homework Statement Anand, Bhadkamkar, and Moghe (1995) used a fractional factorial design to determine which of the six possible factors influenced the determination of manganese in cast iron. The six factors and their levels follow: A-Titration speed ; Medium...

Hi There Based on a Vapour compression refrigeration system: Does anyone out there know a good estimate or any real values for the total heat transfer area for the hot and cold sides of a domestic refrigeration system? i.e. the sum of the areas of the evaporator and the condenser. For the...

I've an impeller choice to make for a stirred tank reactor and would love some opinions. Essentially, I've a three level agitator as shown in the sketch I made. RPM is fixed (~85 rpm). My real choice is only what combination of the two impeller designs I choose. Would you go for a pitched...

bridge rectifier design... Can I use the same bridge rectifier for AC as well for DC voltages? My AC mains is regular 265Vac and DC is 40Vdc. How should I choose bridge rectifier? (In other words, what are the parameters I need to check while selecting diodes for bridge rectifier?) Thank...

Hi all, I'm looking for design of steam platens for Rubber curing presses.The steam platens heat the green rubber article while curing.Other mediums such as oil,induction heating are also available,but I'm more interested in design of steam platens. There is one patent available in google...

hello everyone! so as the title suggest, i wonder if anyone would have any idea to design a simple experiment to determine the bending strength and torsion of a plastic ruler. it doesn't need to be extensive, as the value of the strenght itself isn't important. i just want to know e.g how...

The above (top) design is one for a adjustable regulated voltage using an IC. The bottom schematic is the actual design of the IC regulator. My question is, am I missing an obvious way to derive the relationship for Vo? How does this design work, anyway? I figured it had something to do...

Background: I own a lake marina that rents balls for house boats to tie up to on a permanent basis. The boats range in size and weight for 45' to 65' and weight from 2,000lbs to 15,000lbs. The balls are on a grid pattern 9 balls wide by 10 ball deep and 120' to 140' cabling between balls in all...

I desire to build a box that is sound proof that would be only slightly larger then my head, which I could scream as loud as I possibly could, yet the outside world would barely be able to hear, or not be able to hear at all (as little as possible). I have almost no knowledge of physics (only an...

Hi, I want to design an ADC with these specifications: Fin = 20MHz BW= 20MHz ENOB > 4 Power consumption P < 1mW Could anyone suggest me some ADC for this kind? I have searched a lot in IEEE but there are only two ADC with SAR ADC and time-interleaved ADC. The ultralow power consumption...

I wanted to design a wheelchair that can move without the use of the arms. Instead I wanted to design a chair that can be controlled using a person's body weight, like a segway. Apart from using micro-sensors and computers like a segway does can anybody think of another way of designing a...

Error in title. I meant refracting. At every transition between air and glass it seems to me like there would be some reflection. Each photon it seems would have a certain probability of entering a lens and reflecting off of both of the lenses interior surfaces and then continuing on into the...

I am currently in the process of designing an end-plate for a heat exchanger. I know I can do what I am about to ask with FEA, but that is not feasible right now. Here are the design parameters: Shell and tube HX, Max operating Temp=1100 F, 59 1" SS 304 Tubes, staggered pattern, 12" Shell OD...

This is about mechanical engineering I was told that production/manufacturing engineers earn a lot less than Design engineers, is it true?

Hello all, New here. Hopefully I'm following the guidelines by posting here. So, I am in need of some help in analyzing a stand that I am designing. It has an unusual arch in the middle supported by four members; together they make a tire stand. My tire is 40inches in width. And the stand...

Homework Statement Let f(x3; x2; x1; x0) = (y1; y0) such that y1 = 1 if the number of 1's in x3x2x1x0 is even, 0 otherwise, and, output y0 = 1 if the number of 1's in x3x2x1x0 is odd, 0 otherwise. 1. Implement f with four 2-to-4 decoders. 2. Implement f with a 4-to-1 multiplexer with selection...

Hello people, I am interested in tutorials about coil design for Maxwell 3D. If anyone have good material or knows where to find it, let me know. Regards,

Greeting. This is my first thread in engineering zone. Pleased to meet you all As the topic said. I want to ask about how possible to make animal powered vehicle for animal Or simply said, can we create bicycle for animal? I just think that, Human walk is low efficient compare to bicycle...

I want to sample exhaust gas just behind a Catalyst. The problem being the gas varies across the area of the brick so a normal sample probe could read high or low. The general idea is to use a tube with holes in across the area of the brick, however I'm not sure what size to make the holes as...

A mechanical design question, just wanted to pick your brains about a project I'm working on. I have a fixture that houses a magnet, when an operator loads a part with a screw the magnet jumps and a thru beam on the magnet detects that a screw is present. Without a screw (below) the magnet...

Hey...I was trying to design a practical of mine...There is this question where I am supposed to design a tuned RF Amplifier with gain 100 for a frequency 720KHz with BJT. I know that I will get frequency with LC tank circuit but the gain is a different story. I have searched 5-6 books and am...

Hi. I am currently working on a scissor lift design. I'm having some trouble deriving the equations for the actuator force for some reason. Think I'm getting blind on this ATM or something :P. Anyways if someone could help a bit id appreciate it. [I have derived equations I'm just not sure I...

I am doing an undergraduate course in Electronics in India. My line of interest is in Electronic design. Can anyone kindly suggest me some part-time or full time courses in Electronic design and if possible the job potential too. Thanks in advance KRISHNA

I was hoping to get some perspective from practicing engineers on the difference of a career in design making stuff, or analysis ( performing FEA, CFD etc on designs). I am in a rotational program and have some flexiblity. I ask because it appears these are divergent choices and going down one...

What would be the prerequisites for an operating systems course or for a compiler course? I am well-versed in C programming and digital circuit design but have very little knowledge of computer architecture. Would I be recommended to go through a text on comp arch before starting a text on...

I read on the Mars One website that Bas Lansdorp (the director of Mars One) will talk about the design of their Martian habitats during the ISDC conference in San Diego, California next Thursday: http://mars-one.com/en/mars-one-news/presentations-events They also expect to start building a...

Hello experts…i am new in the RF field and i need some help… So i have a double balanced mixer (ZAD-6+ of Mini Circuits) that need +7dBm Local OsC power and 30MHz Loca.osc frequency. At the time i use signal generator for l.o How can i make a crystal oscillator with these parameters? Can...

hi: i designed an active low-pass filter,but i don't know if it correct method or not i want fc=200 Hz and n(order)=4. i use this method: by let C=100 nF and use this equation "fc=1/(2*pi*C*R1)" i get R1= 8 Kohm,R2=R1 this is for one stage to get filter of 4 order,i repeat that...

Greetings PFers, I'm designing a demonstration unit for use in grade schools demonstrating the principle of resonance upon wine glasses (shattering them). I intend to put a wine glass into an acrylic chamber of some geometry, hand the student a microphone and see if they can generate the...