Testing Definition and 589 Threads

i'm getting my concepts very confused now... so the formula for the normal distri is (y - u)/(sigma)/((sqroot(n)). so if I want to test y, I set that formula = to alpha(where alpha is the confidence level). that is if it is one sided. if it is 2 sided, do I still set it to alpha, or...

http://xxx.sf.nchc.gov.tw/pdf/hep-ex/0503034 This paper is a review of anti hydrogen production, and how it could be used to test gravity theories.

Hi we did a lab today for testing compounds in foods... So basically the only way to detect if a lipid is present is by transparency? Like we used a paper towel, we added a few drops of the substance to the paper towel and then rubbed it today, if it was transparent it tested positive for...

Hello all Let's say we have the following classes: public class Merge { protected static void merge(int[] a, int first, int last, int middle) { int i, j, k; int[] tempArray = new int[a.length]; i = first; j = first; k = middle + 1...

Here's postulate (13.1) now... First of all what does he mean by "distinguish"? And why would that be in contradiction with the postulate of SR? Thanks.

Regular readers to GA&C here in PF will know only too well that some of our prolific posters feel the mainstream work is rather too heavily model-laden for their taste ... and others that this characterisation quite unfair. Wrt those who are comfortable with the redshifts of galaxies (and SN)...

Hi. One of my friends is a vegan (yes, i know, but that's not the point) and she's very interested in product testing on animals...Namely, technology that can replicate it. See, she's looking for more information on how technology, machines or otherwise, might be as accurate of measuring...

Everytime I try opening a topic here my browser shuts down. So this is just to see what happens if I start the topic I try to get into.

What if someone set up an experiment, where they sped up a mass of high density in a circle ethier by making its radius smaller and smaller, until the large mass is moving near the speed of light, then at an extremely small highet above this rotating mass you set off a high frequency laser...

\({\root{2}\of{x}}\) is it square root of x ... :) ?

Hello ! Anyone have any idea how to test the total avaible energy can be drawn by battery? Thx

hello everybody I am new to this board, and i just found out about latex coding, so i woul like to test it out. is there a specific section i can test it out in(im guesing this section)? i do not want to break any of the board rules...

Today, what tests are considered standard for IQ testing purpose? Thanx, God blesses you if you help Howard

Correct me if i am wrong but... I remember quite some time ago reading an article about scientists sending gyroscopes up into the Earth's outer atmosphere to check for frame dragging... does nyone know what happened about that experiment?

So... If the mass of a fermion is dependent of the frequency of vibrations of extended objects such as strings or membranes, etc, then wouldn't this frequency (and thus the mass) be subject to gravitational redshifting just as photons are? So shouldn't string/M-theory be just as easy to test as...

You are designing a type of shock absorber that protects delicate objects from jolts during transportation. To test your prototypes, to decided to find the maximum height from which a crytal vase wrapped in your absorber can be safely dropped. You get a step ladder with 40 steps and decide to...

\sum_{n=1}^\infty\frac{\cos{\frac{n}{2}}}{n^2+4n} Sorry I am just trying out this latex stuff as it's very new to me. Anyways, I want to test a series for convergence. The series is (if the latex does not work right) suppose to be The sum from n=1 to infinity [cos(n/2) / (n^2+4n)]...

We just learned Alternating Series, but I am still unsure of the procedure. A couple of problems in the book have stumped me, and I need to test them for convergence. 1. Sum n=1 going to infinity of [cos(n*pi) / (n^(7/8))] 2. Sum n=1 going to infinity of (-n/5)^n I am really lost, I'd...

Not sure where to put this, so I'll drop it here. It seems that both NASA and ESA are committed to performing tests that may show deviations from GR. NASA has LATOR http://science.nasa.gov/headlines/y2004/26mar_einstein.htm And ESA has LISA...

Hello All, I've always been curious about historical seismic activity prior to the 20th century. Then the advent of the last century until now, i have heard that seismic activity has increased dramatically. Then i got to conceptualizing how many underground nuclear test's have been...

This heated debate on animal testing happened in my English Class the other day. A large number of girls are against it. I personally am on the fence. So what's your take on the issue?

http://doc.cern.ch//archive/electronic/gr-qc/0402/0402009.pdf A perspective on Quantum Gravity Phenomenology1 Giovanni Amelino-Camelia aDipart. Fisica, Univ. Roma \La Sapienza” and INFN Sez. Roma1 P.le Moro 2, 00185 Roma, Italy ABSTRACT I give a brief overview of some...

This just out: http://arxiv.org/hep-th/0401087 Joao Magueijo <j.magueijo@ic.ac.uk> Lee Smolin "String theories with deformed energy momentum relations, and a possible non-tachyonic bosonic string" Smolin is one of the inventors of Loop gravity but also has authored and co-authored a...

Hi please help I have to do a piece of coursework on sensors. I am testing a thermistor and my teacher mentioned something about calibration but I don't know what it is can someone help please. I have taken results for the resistances for every ten degrees from 0 to 150

Hi please help I have to do a piece of coursework on sensors. I am testing a thermistor and my teacher mentioned something about calibration but I don't know what it is can someone help please. I have taken results for the resistances for every ten degrees from 0 to 150

We've seen divisibility testing for different numbers...for 2,3,4,5,7,11... But now I want to know is there any way to find divisbility with any prime number? Suppose, how can I say 12783461236 is divisible with 97 or not?

http://arxiv.org/list/gr-qc/0311 http://arxiv.org/PS_cache/gr-qc/pdf/0311/0311021.pdf http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=30467 http://www.cerncourier.com/main/article/42/7/18. -------------------------------------------------------------------- some...

please help with attachment Trying to upload a diagram (never did this before). Any ideas why I can't seem to do this? I'm trying to attach a simple jpeg drawing. I put it in the Browse box at the bottom of the edit screen but it doesn't appear in the post.

Using a .05 level of sign, test the hyp that the probability of the NCAA champion being from the big east is 20% The actual ratio is 3/63 Where should I start? thanks nautica

I thought it would be nice for you guys to play around with this, I have got my answer, let's see if anyone views it the same way. There is a gene coding for a protein. The protein can either have amino acid A on the end or the aminoacid B. It turns out that humans only have amino acid B...

http://wugrav.wustl.edu/people/CMW/SpeedofGravity.html Papers by Kopeikin claiming this tests the speed of gravity Papers by authors claiming the measurement is NOT sensitive to the speed of gravity

There is a lot of controversy over the morality of testing new products and procedures on non-human species. I seek to find out what everyone believes concerning this issue, as well as how much everyone knows about alternatives.

http://www.tdimension.com/news.html I believe TEN had mentioned that these things wouldn't work in a vacuum due to ionized air flow. Well here's a lab who did sucessful testing in a vacuum. I'm sure there's a reason this cannot be harnessed, but maybe someone would fill in the blanks for me...

I think, myself included [and mainly:smile:], there are people at PF that would like to know good testing equipment for electronics and such [multimeters etc]. Anybody with knowledge on the subject is welcome to suggest products and personal experience is very good also.

Can someone inform me a bit on the background of this problem, it's experimental testing and it's implications? If I have it right, it involves two particles which are involved in a singular event. If you measure the momentum of the first particle, you not only create uncertainty in it's...

i dare say i will be jumped on from a great hight for this statement but here goes anyway if spacetime has structure as predicted in LQG then anything traveling through this structure should have a different speed than in a pure vacuum without gravitational effects, the problem i see is unless...

I'm trying to prove that my daughter is my daughter. We just did DNA testing, but either me or my daughter has a mutation in our DNA and the lab is having a hard time coming up with an answer. They said that they are 98.75% sure that I'mno the father, but they won't say I'm the father unless...

Was going to put this up a couple of days ago but was a bit preoccupied. So here goes. Imagine that you take a single crystal of Iron, a whisker, and bend it around to make a circle. How could you find out if the crystal was magnetized? Remember, all the magnetic field is contained inside the...

Hi all, I came across this term: "Modal testing" in a job description on monster.com, and I don't know what it is (at least I don't think I do...) Anybody have an example of what a person who would be: "Assisting in the preparation of test plans and support strength, vibration...