Quality Definition and 186 Threads

I'm currently an autodidactic mathematician/physicist and before I dive into my rusty calculus textbook to review I first want to be sure that I've filled in any holes in my algebra skills. I don't want to waste my time digging through entire algebra textbooks when I already understand the...

Creativity? Math Intellect? Other?

Hey, where can I find good quality '(not wikipedia) data on a metal material? Mainly I want as much data as possible about 11SMnPb30 + C (SS 1914). It is a leaded-cutting steel for mass production of parts where the requirements on the mechanical properties are low. Would also be nice to...

My situation is as follows: I have a set of points in a bounded three-dimensional space. Simply put, each point has an X, Y and Z coordinate. I'm looking for a mathematical parameter that (globally) expresses how well the points are distributed over the space. The parameters should take the X...

How can increase the Voltage from 185 Volt AC to normal Voltage range (230 V AC) for my house as in the evening time i m suffering from this problem. does capacitor help? and i don't want to installed the Voltage stabilizer.

For some reason I can't post in the "Math & Science Learning Materials" section, so I'm posting my inquiry on the quality of the learning materials I'm using here. I'm aware there's a lot of free resources such as KhanAcademy or otherwise, but how legitimate is the information compared to...

I want to include graphics in a latex document, so I used various terminal (png, jpg) in gnuplot but when I include in latex, the result it isn't very good...i would coloured graph , so which terminal i can use? what pagkage i have to include in tex file? Thanks for helpers

Homework Statement A small cuckoo clock has a pendulum 25 cm long with a mass of 10 g and a period of 1 s. The clock is powered by a 200 g weight which falls 2 m between the daily windings. The amplitude of the swing is 0.2 rad. What is the Q (quality factor) of the clock? How long would the...

While discussing Taylor's theorem, my professor pointed out that for n=2, Taylor's Theorem says: f(x) = f(x_{0}) + f'(x_{0})(x - x_{0}) + O(|x - x_{0}|^{2}) He then emphasized that O(|x - x_{0}|^{2}) is a much better approximation than o(|x - x_{0}|). But how is O(|x - x_{0}|^{2}) a...

As a future physics teacher I've been looking online for a good Newton's cradle. Unfortunately all the ones I come across are cheap and my prior experiences with them have obviously been of rather poor quality. I was wondering if anyone knows of any sources for high quality Newton Cradles; I'm...

Hi there, I am using a PC to TV converter fairly unconventionally. I'm connecting a VGA output to a PC to TV converter. This converter outputs a composite video which I then connect to a USB Video Capture Device, which feeds into my computer . The resolution of the image I want to capture...

I have attached a copy of my homework paper to this post. I'm fairly certain the answers are not correct. The quality for both parts is 1.00. In addition, the quality increases (to the fourth decimal place) in the 0.0 degree Fahrenheit sample. I'd expect the quality to go down due to less heat...

What are the softwares that people usually use to create high quality schematic figures (both in 2D and 3D) suitable for publication? For example Fig 1) in http://arxiv.org/abs/1105.1787

Hi all, I've got a question about an effect an effect I've seen when playing with rubber bands and a 1.5(ish)mm wide gold chain. I held one end of a rubber band while i rolled the other end between my thumb and index finger until it became difficult to do so without a third hand (You'll see what...

Hey guys, I'm an engineer working on the design of a small start up solar power plant. The solar power plant will operate using "solar troughs" instead of the traditional photovoltaic cells. In these systems water is the working fluid and sunlight is focused from a solar reflector onto a pipe...

Respected members, PLEASE help me in determining quality factor of a piezoelectric rectangular plate MEMS RESONATOR in COMSOL multiphysics.there is a need to define some 'damping'.where should i define that.. PLS HELP ME ITS URGENT thank you and best

First of all I thought that this thread belongs to the philosophy section due to it's ambiguous character (a la, beauty, aesthetics, elegance, order). Is it possible to express yourself through math? Do you know any people who did express themselves through mathematics? Euclid, Euler, Gauss...

any body know where to get some high quality gsm antenna ?

Is there any way I could find out the "quality" of my posting in general? I just want to know if I am doing a decent job overall of explaining things to people, or completely screwing up lol. I'm assuming there isn't, but I just thought I'd ask.

I have been plagued with bad quality printing in textbooks, so many different publishers with a quality of printing that can only be described as ****, and it is doing my head in. If you're familiar with Landau & Lifgarbagez series of books, to my knowledge they are only published by...

Do you have any ideas like something which helps hearing impaired people to communicate with others who don't know sign language, for example a glove, which translates sign language to text which is displayed or even translates it to speech? Any kind of things like that or can be something...

Homework Statement Given the network transfer function H(s)=10s/(s^2+300s+10^6) Find the center frequency, lower and upper half power frequencies and the quality factor Q. Homework Equations Beta=R/L (omega naught)^2=1/(LC) BW=hi-lo=R/L H(s)=(R/L)s/(s^2+(R/L)s+1/(LC))...

Lolz too much free time is not good for me. I start thinking about everything! One of the thing I thought about, of course, is my future. And I keep thinking how hard it would be for me to be with someone who doesn't want to adopt. (lolz that's why I'm doomed to be single for life.) I know you...

I got a question for you. Living in a country with 250 Volts elect, i got into a house that had weak lights from time to times, and the other some times couldn't turn on some appliances because of that, is there a device which would correct that? I was thinking of a PFCD - The PFCD increases...

Homework Statement A rigid tank contains 1 kg of saturated liquid and saturated vapor mixture at 400 kPa. What quality (x1) do you need if you want the P-v diagram to pass through the critical point? Use steam tables to answer this question. Homework Equations x = quality =...

Homework Statement Basically I'm writing up a formal report on our experiment on Newton's rings - one of the things in our aims was in investigate the quality of the lenses we were using. Whilst many sites also say Newton's rings can be used to investigate the quality of the lenses not much...

Is there an easy way of making publishing quality figures in MATLAB? I use MATLAB for calculations and working plots, but to get a nice figure (I mean proper fonts, scales, some text, symbols, lines for different datasets) takes me so long time that I better use something like ORIGIN program for...

Can you or can you not use specific volume to find quality? I know it can be found using mass but can you use specific volume?

I live in Georgia and it would be cheaper for me to go there. I can't find much information from searches, so I wonder if there is anyone here in the GT physics program. I know a lot about the engineering side and heard that engineering majors aim for a C in their courses and that it is...

I am always at doubt of the quality of my university (even though it is the best one in my country for my major which is engineering) and I want to know if taking a scholarship to the USA is easy and will guarantee me better education. I am studying in Kuwait university, it's a non mixed gender...

Hello- On places like eBay and Amazon, one sees a lot of ultra-cheap, under $15 laser pointers in various colors. For example, my favorite green astronomy laser cost me twenty dollars from amazon last year. Contrast these prices with laser pointers from more respected brands, which seem to range...

How should steam quality, mass flow rate, temperature and pressure of the steam be optimized in order to have the most out of turbine? I mean which ones have be to be higher? Also when they design turbine, do they design it based on the properties of the steam or they change the properties of...

I have been going through some great science lectures I have downloaded from itunes U from Apples itunes store. You don't have to own an ipod to use them as they can be viewed for free on a computer. Unfortunately the sound quality on many audio and video lectures is very poor. We can take...

Hello! I was just wondering if the perceived quality or ranking of an undergrad institution has a significant imapct on the chances of getting accepted to a given graduate program in physics. There have been people who have said things ranging from "little to no impact" to "vital", so I'm...

Hi, so I did the question, but apparently my answer is off by a factor of 2. An accelerated electron radiates energy at the rate Ke2a2/c3...e is the electron charge, a is the instantaneous acceleration, c is the speed of light, K=6x109Nm2/C2...whatever that is. So first I had to find how much...

Homework Statement How would one estimate the quality factor Q of a tuning fork? Is anyone able to make an estimate of what it would be...? TY! Homework Equations The Attempt at a Solution

Water is being used as a coolant by flowing through a channel. I know the mass flow rate of water. And i know the inlet properties of water. I also know that the water is coming out of the channel at a vapor quality of 1. How do i calculate the heat flux that the water is subjected to during...

What's "quality factor" in oscillation ? I want to know why and how it was defined ? Is it useful in some ways ?

I know this is a little strange to ask on a forum but... I don't know where else to ask! My boyfriend is a physicist and I want to get him some fun book relating to it for his birthday, but most of the books I found looked like they were poor quality ("New York Times bestsellers" written by...

Homework Statement My book defines the equation for energy of an RLC circuit to be E = 1/2 L I^2 + 1/2 Q^2/C In series the Quality factor is (L/C)^1/2/R My question is will these equations hold for an RLC circuit that is parallel. I.E. the Resistor is in parallel with the Inductor which is...

Hey guys! Just wanted to inquire about the following relationship. Given a boiler and all the water content inside is above boiling point. Would the dryness factor (vapor quality) decrease or increase with pressure reduction. Example we start at 500 kPa then move down down to 400 kPa. Would the...

Is there a difference in the quality of gasoline among different companies? I see Shell gas station sells premium unleaded (9/10) for 3:00/gallon, and across the street, Rotten Robie sells the same premium unleaded (9/10) for 2:60. I assume shell station might provide a better service (accepting...

sorry if i posted this in wrong section.. im having problem on where the value in the circle come from,can someone give me an answer or a hint. TQ

Being a bit of a movie buff, I tend to pick things apart, as I'm sure many people here do. Here is one that came up recently: Is Jeff Goldblum a quality actor, or is he just someone that people like to watch? While I tend to enjoy his movies for light entertainment, I started noticing that he...

Quality of Phd in US or Germany... Hi folks... I want to do phd in computer sc. but could not make up my mind to select the destination country whether US or Germany :confused:. In US the phd duration long compared to Germany, in Germany funding is also good but in us the University s' are...

Hi, I am trying to understand the solution to a quiz I had, and am having trouble. The question was: The solution says: First off, why (when they solve for internal energy and specific volume) do thy use the formula (Quality)*Uvapor + (1-quality)*Uliquid ? This makes sense to me in my...

Homework Statement Prove that the quality factor of a rectangular cavity resonator which is filled with a lossy dielectric but has perfectly conducting walls, is given by Q = \frac{1}{\tan\delta} where \tan\delta is the loss tangent, i.e. the ratio of the imaginary part of the dielectric...

Any suggestions how I can improve the quality of STM (scanning tunneling microscopy) images? And how can I trace artifacts?

My XBOX 360 has broken four times now, I have Vista which is a complete disaster, and my Zune doesn't even work with the operating system that they made. I would start buying products from a new company but many other companies are even worse than Microsoft is.

Hello, In Power Quality, how does starting of large motor will cause voltage sag? How does voltage sag cause the motor to stall and overheat? A friend mentioned that it has something to do with sustaining the source power, but I simply don't get it. Thank you in advance.