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Science and technology forum - - mihai.secasiu@nixdoc.netmihai.secasiu@nixdoc.netSat, 21 Jul 2018 15:37:48 GMTRelativity :: The CADO Reference Frame for an Accelerating Observer
http://sci4um.com/post-327778.html#327778
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=2329" target="_blank">Mike Fontenot</a><br />
Subject: The CADO Reference Frame for an Accelerating Observer<br />
Posted: Tue Nov 06, 2012 3:33 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">I posted some information about the CADO reference frame, and the CADO equation, way back in 2005 on this forum. This forum now seems to be inactive, which is a shame, I think ... it was a good forum.
<br />
<br />
I created a new webpage during the last year, that explains the CADO reference frame in considerable detail:
<br />
<br />
<a href="https://sites.google.com/site/cadoequation/cado-reference-frame" target="_blank">https://sites.google.com/site/cadoequation/cado-reference-frame</a>
<br />
<br />
The original CADO paper is:
<br />
<br />
Fontenot, Michael L., "Accelerated Observers in Special Relativity", Physics Essays, December 1999, pp. 629-648.
<br />_________________<br /><a href="https://sites.google.com/site/cadoequation/cado-reference-frame" target="_blank">https://sites.google.com/site/cadoequation/cado-reference-frame</a></span><br />
num-analysis :: Base Conversion - Negative Base
http://sci4um.com/post-327717.html#327717
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17206" target="_blank">Tapas Bose</a><br />
Subject: Base Conversion - Negative Base<br />
Posted: Tue Aug 03, 2010 8:47 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Hello everybody. I am working on base conversion by programming. I am facing trouble in the conversion of decimal to negative base i.e., nega-binary, nega-decimal etc, for real number, i.e., fractional number and vise versa. Wikipedia provide a rule for this conversion but that is for integers only. If anybody can provide any rule or information regarding fractional number it will be very helpful to me. Thank you.
</span><br />
Research :: Max volume of inscribed rectangular parallelepiped
http://sci4um.com/post-327694.html#327694
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17203" target="_blank">noban</a><br />
Subject: Max volume of inscribed rectangular parallelepiped<br />
Posted: Wed Jun 30, 2010 10:01 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">How to solve optimization problem of finding rectangular parallelepiped (namely it's Xvect_lowerBound and Xvect_upperBound) which is inscribed into n-dimensional convex space bounded by half-spaces?
<br />
<br />
One of the approaches is to simulate physical model and start with small hypercube which then will expand itself. But I'd like to use some optimization libraries (I have IPOPT installed). As I understand it, this is multivariable optimization problem. Does Ipopt support it? If not can it be transformed into single variable problem? Is there areny other optimization libraries that can solve such problem? If not then if there any software which is capable to simulate hypercube expansion inside convex polytope?
</span><br />
Relativity :: The ultimate
http://sci4um.com/post-326504.html#326504
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17070" target="_blank">3ality</a><br />
Subject: The ultimate<br />
Posted: Wed May 21, 2008 10:53 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody"><a href="http://www.geocities.com/sciliterature/RelativityDebates.htm" target="_blank">http://www.geocities.com/sciliterature/RelativityDebates.htm</a>
</span><br />
Relativity :: The ultimate
http://sci4um.com/post-326503.html#326503
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17070" target="_blank">3ality</a><br />
Subject: The ultimate<br />
Posted: Wed May 21, 2008 10:52 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody"><a href="http://www.geocities.com/sciliterature/RelativityDebates.htm" target="_blank">http://www.geocities.com/sciliterature/RelativityDebates.htm</a>
</span><br />
Probability :: Question about Life.
http://sci4um.com/post-326487.html#326487
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=12408" target="_blank">socratus</a><br />
Subject: Question about Life.<br />
Posted: Sun Jan 06, 2008 10:01 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">What inhale the Life in formulas and equations ?
<br />
What must be present in a body to make it alive ?
<br />
=============
<br />
According a " big bang" our Universe exist 13 (+ ) billion years.
<br />
My question :
<br />
Is it possible to create a child from cell [ zigota] only in 280 days
<br />
according to probability theory? If " yes "it will be take time not
<br />
280 days but will take time more than our Universe exist.
<br />
If " no " so the process must have aim.
<br />
It means somebody /something must manage this process.
<br />
And, please, remember this process is always individual.
<br />
What answer is true?
<br />
==========..
<br />
Best wishes.
<br />
<a href="http://www.socratus.com" target="_blank">http://www.socratus.com</a>
<br />
<a href="http://www.wbabin.net/" target="_blank">http://www.wbabin.net/</a>
</span><br />
Relativity ::
http://sci4um.com/post-326486.html#326486
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=12408" target="_blank">socratus</a><br />
Subject: <br />
Posted: Sun Jan 06, 2008 9:49 pm (GMT 0)<br />
Topic Replies: 1<br /><br />
<span class="postbody">
</span><br />
Relativity :: For the Einstein worshipers and skeptics
http://sci4um.com/post-326474.html#326474
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17070" target="_blank">3ality</a><br />
Subject: For the Einstein worshipers and skeptics<br />
Posted: Tue Oct 02, 2007 11:23 pm (GMT 0)<br />
Topic Replies: 3<br /><br />
<span class="postbody">Two excellent books.
<br />
<br />
The Einstein Myth and the Ives Papers: A Counter-Revolution in Physics by Dean Turner; Richard Hazelett (Paperback - Oct 1, 2005)
<br />
<br />
<a href="http://www.amazon.com/Einstein-Myth-Ives-Papers-Counter-Revolution/dp/1932717056/ref=sr_1_1/105-8940098-5720432?ie=UTF8&s=books&qid=1191367056&sr=8-1" target="_blank">http://www.amazon.com/Einstein-Myth-Ives-Papers-Counter-Revolution/dp/1932717056/ref=sr_1_1/105-8940098-5720432?ie=UTF8&s=books&qid=1191367056&sr=8-1</a>
<br />
<br />
<a href="http://www.amazon.com/gp/reader/1932717056/ref=sib_dp_bod_toc/105-8940098-5720432?ie=UTF8&p=S008#reader-link" target="_blank">http://www.amazon.com/gp/reader/1932717056/ref=sib_dp_bod_toc/105-8940098-5720432?ie=UTF8&p=S008#reader-link</a>
<br />
<br />
Albert Einstein: The Incorrigible Plagiarist
<br />
<a href="http://home.comcast.net/~xtxinc/prioritymyth.htm" target="_blank">http://home.comcast.net/~xtxinc/prioritymyth.htm</a>
</span><br />
Relativity :: aether drift patents
http://sci4um.com/post-326466.html#326466
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17070" target="_blank">3ality</a><br />
Subject: aether drift patents<br />
Posted: Tue Sep 18, 2007 10:32 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">I found some patents that disclose methods of measuring the velocity relative to the electromagnetic aether.
<br />
<br />
<br />
<br />
You can look them up here <a href="http://ep.espacenet.com/numberSearch?locale=en_EP" target="_blank">http://ep.espacenet.com/numberSearch?locale=en_EP</a>
<br />
<br />
Here's the list:
<br />
<br />
US6634600 (USA)
<br />
GB2276718 (Britain)
<br />
DE3823106 (Germany)
<br />
JP10019683 (Japan)
<br />
<br />
<br />
US 6634600 Satellite constellation for measuring atmospheric wind speeds using doppler lidar
<br />
see Column 2 lines 10+
<br />
</span><table width="90%" cellspacing="1" cellpadding="3" border="0" align="center"><tr> <td><span class="genmed"><b>Quote:</b></span></td> </tr> <tr> <td class="quote">
<br />
Additionally, various satellite observation methods based on the Doppler effect have been proposed. JP-A-10 19683 proposes, in a constellation of at least three satellites, sending laser pulses from one satellite to a mirror on other satellites rotating in opposite directions. The pulses are reflected toward the source satellite and the time difference between the pulses is measured; a measured value of the electromagnetic ether speed is deduced from this.
<br />
</td> </tr></table><span class="postbody">
<br />
<br />
<br />
Here's some Derwent abstracts of the others.
<br />
<br />
<br />
PUB-NO: GB002276718A
<br />
DOCUMENT-IDENTIFIER: GB 2276718 A
<br />
TITLE: Instrument for measuring velocity and direction.
<br />
<br />
PUBN-DATE: October 5, 1994
<br />
<br />
INVENTOR-INFORMATION:
<br />
NAME COUNTRY
<br />
BRISCOE, JOSIAH ALFRED
<br />
N/A
<br />
ASSIGNEE-INFORMATION:
<br />
NAME COUNTRY
<br />
ASPDEN HAROLD
<br />
GB
<br />
APPL-NO: GB09306690
<br />
APPL-DATE: March 31, 1993
<br />
PRIORITY-DATA: GB09306690A (March 31, 1993)
<br />
INT-CL (IPC): G01S011/12 , G01P003/36
<br />
EUR-CL (EPC): G01P003/36 , G01S011/12 , G01P013/04
<br />
<br />
US-CL-CURRENT: 342/107
<br />
<br />
ABSTRACT:
<br />
<br />
CHG DATE=19990617 STATUS=O> An optical instrument for sensing absolute movement v of the instrument, relative only to the aether in which light propagates, comprises a coherent light source 1, which is a laser beam, divide 2 into two parallel rays which fan out as spherical wavefronts and overlap at an observer position to create optical interference fringes. The lateral positions of the fringes are affected by lateral motion through space at velocity v measured in the plane of the parallel ray axes. Displacement of the fringes is detected by a photoresistor 6 placed behind a pinhole in a screen 5. The screen can also be laterally displaced to scan across the fringes. The instrument can be suspended to allow rotation in order to vary its absolute orientation, which is said to be detectable by the fringe displacement. The instrument thus has navigational or educational applications.
<br />
<br />
-----------------------------------------------
<br />
<br />
DERWENT-ACC-NO: 1990-023226
<br />
DERWENT-WEEK: 199004
<br />
COPYRIGHT 2006 DERWENT INFORMATION LTD
<br />
TITLE: Lorenz-theory-based data transmission method - carrying data on aether waves of longitudinal electrostatic and magnetostatic type
<br />
INVENTOR: BSCHORR, O
<br />
PATENT-ASSIGNEE: BSCHORR O[BSCHI]
<br />
PRIORITY-DATA: 1988DE-3823106 (July 7, 1988)
<br />
PATENT-FAMILY:
<br />
PUB-NO PUB-DATE LANGUAGE PAGES MAIN-IPC
<br />
DE 3823106 A
<br />
January 11, 1990
<br />
N/A
<br />
009
<br />
N/A
<br />
APPLICATION-DATA:
<br />
PUB-NO APPL-DESCRIPTOR APPL-NO APPL-DATE
<br />
DE 3823106A
<br />
N/A
<br />
1988DE-3823106
<br />
July 7, 1988
<br />
INT-CL (IPC): G01S005/00, H04B013/00 , H04L027/00
<br />
ABSTRACTED-PUB-NO: DE 3823106A
<br />
BASIC-ABSTRACT:
<br />
The data transmission method uses as data carrier the longitudinal electrostatic and magnetostatic aether waves resulting from the modified Lorenz concept. The said aether waves can be used to as navigation aids. The auther outlines Lorenz's theory and modifications and discusses transversal and longitudinal waves and their contributions to the carriage of information.
<br />
CHOSEN-DRAWING: Dwg.1/2
<br />
TITLE-TERMS: THEORY BASED DATA TRANSMISSION METHOD CARRY DATA WAVE LONGITUDE ELECTROSTATIC MAGNETOSTATIC TYPE
<br />
ADDL-INDEXING-TERMS: RETARD POTENTIAL POSITION FIX NAVIGATION
<br />
DERWENT-CLASS: W01 W02 W06
<br />
EPI-CODES: W01-A09; W02-C09; W06-A03;
<br />
SECONDARY-ACC-NO:
<br />
Non-CPI Secondary Accession Numbers: N1990-017730
<br />
<br />
-------------------------------------
<br />
<br />
PAT-NO: JP410019683A
<br />
DOCUMENT-IDENTIFIER: JP 10019683 A
<br />
TITLE: METHOD AND DEVICE FOR CERTIFYING EXISTENCE OF ELECTROMAGNETIC ETHER
<br />
PUBN-DATE: January 23, 1998
<br />
INVENTOR-INFORMATION:
<br />
NAME COUNTRY
<br />
NAKAMURA, HIROSHI
<br />
ASSIGNEE-INFORMATION:
<br />
NAME COUNTRY
<br />
NAKAMURA HIROSHI
<br />
N/A
<br />
APPL-NO: JP08188316
<br />
APPL-DATE: June 28, 1996
<br />
INT-CL (IPC): G01J009/04 , G01B009/02 , G01D021/00
<br />
ABSTRACT:
<br />
PROBLEM TO BE SOLVED: To provide a method for certifying the existence of electromagnetic ether as a medium of electromagnetic wave.
<br />
SOLUTION: Michelson-Morley interferometer utilizing Jaseja's laser, is installed on an aircraft moving at a high speed, or a space shuttle having higher relative speed, and the wind of ' electromagnetic ether' is observed by changing an angle in a traveling direction. Or plural (at least three) of artificial satellites are launched in a condition that they have the relative speed as high as possible to the ground, the laser pulses are emitted from one of the satellites to the mirrors of the other satellites, in such manner that they are rotated in the direction opposite to each other, the mirrors of the other satellites are installed in such manner that the laser pulse is recovered to the original satellite, and the time difference of the laser pulses recovered to the original satellite is measured.
<br />
COPYRIGHT: (C)1998,JPO
<br />
<br />
--------------------
<br />
<br />
DERWENT-ACC-NO: 1998-148922
<br />
DERWENT-WEEK: 199814
<br />
COPYRIGHT 2006 DERWENT INFORMATION LTD
<br />
TITLE: Electromagnetic ether existence verification method - involves observing existence of electromagnetic ether by changing angle of progress direction of satellite in which interferometer is installed
<br />
PATENT-ASSIGNEE: NAKAMURA H[NAKAI]
<br />
PRIORITY-DATA: 1996JP-0188316 (June 28, 1996)
<br />
PATENT-FAMILY:
<br />
PUB-NO PUB-DATE LANGUAGE PAGES MAIN-IPC
<br />
JP 10019683 A
<br />
January 23, 1998
<br />
N/A
<br />
008
<br />
G01J 009/04
<br />
APPLICATION-DATA:
<br />
PUB-NO APPL-DESCRIPTOR APPL-NO APPL-DATE
<br />
JP 10019683A
<br />
N/A
<br />
1996JP-0188316
<br />
June 28, 1996
<br />
INT-CL (IPC): G01B009/02, G01D021/00 , G01J009/04
<br />
ABSTRACTED-PUB-NO: JP 10019683A
<br />
BASIC-ABSTRACT:
<br />
The method involves installing an interferometer which is used as a laser source in a satellite moving at high speed. The angle of progress direction of the satellite is changed and the existence of electromagnetic ether is observed. Laser pulse is emitted from one satellite to other satellite and is received back from the other satellite. The time difference of the emission and reception of laser pulse is measured.
<br />
ADVANTAGE - Avoids influence of relative velocity of light source in verification result.
<br />
CHOSEN-DRAWING: Dwg.2/2
<br />
TITLE-TERMS: ELECTROMAGNET ETHER EXIST VERIFICATION METHOD OBSERVE EXIST ELECTROMAGNET ETHER CHANGE ANGLE PROGRESS DIRECTION SATELLITE INTERFEROMETER INSTALLATION
<br />
DERWENT-CLASS: S02 S03
<br />
EPI-CODES: S02-A03A; S02-K08A; S02-K09; S03-A09;
<br />
SECONDARY-ACC-NO:
<br />
Non-CPI Secondary Accession Numbers: N1998-118040
</span><br />
Engineering :: Inductors
http://sci4um.com/post-326308.html#326308
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16642" target="_blank">Gavin</a><br />
Subject: Inductors<br />
Posted: Wed Jun 20, 2007 2:25 pm (GMT 0)<br />
Topic Replies: 1<br /><br />
<span class="postbody">I know what a Inductor with a Ferrite Core is, but can anyone tell me how the following differ as well as what their pros/cons are?
<br />
I'm particularly interested in what wirewound means and its pros/cons.
<br />
<br />
Ferrite Bobbin Core
<br />
Ferrite Core - Shielded
<br />
Ferrite Core - Wirewound
<br />
Ferrite Core - w/Ferrite Shield
<br />
<br />
Thanks,
<br />
Gavin
</span><br />
Chem :: alkylpolyglucoside
http://sci4um.com/post-325910.html#325910
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17061" target="_blank">mihaela</a><br />
Subject: alkylpolyglucoside<br />
Posted: Thu Feb 08, 2007 1:07 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">hello
<br />
i would like to do some reactions with alkylpolyglucoside, but i am not sure what i am going to get as products...
<br />
For example, if i try to oxydize the APG (it has C-12 chains) with a strong oxydinzing agent as H2O2 what do i get?
<br />
what if i use melamine formol?
<br />
does anyone know how i could brake the moleculeand get easy to treat products? (environmentally friendly, as for example H2O2 gives H2O and O2)
<br />
thanks
<br />
i'm looking forward for your ideas
</span><br />
Chemical :: Flash Distillation
http://sci4um.com/post-325872.html#325872
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17021" target="_blank">paldopal</a><br />
Subject: Flash Distillation<br />
Posted: Wed Jan 17, 2007 1:08 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">A mixture of toluene,ethylbenzene and water is subjected to flash distillation of compostion on mole basis,30%,40%,30% respectively.Assuming mixture of tolune and ethyl benzene obey's Roult's law and that hydrocarbons is completely immicible with water,calculate the temp. and composition of liquid&Vapor phase at Bubble and at dew point.
<br />
Note:
<br />
Temp. in degree C and vapor pressure in mmHg.
<br />
values are seperated by | and not given value by --.
<br />
Data given
<br />
Temp EthlyBen Toluene Water
<br />
50 | 53.8 | -- | 92.5
<br />
60 | 78.6 | 39.5 | 149.4
<br />
70 | 113 | 202.4 | 233.7
<br />
80 | 160 | 289.4 | 355.1
<br />
90 | 223.1| 404.6 | 525.8
<br />
100| 307 | 557.2 | 7601
<br />
110| 414.1 | -- | --
<br />
110.6| -- | 760 |--
<br />
120 | 545.9|--|--
</span><br />
Chem :: Compare and contrast physics and chemistry
http://sci4um.com/post-325853.html#325853
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17020" target="_blank">parent</a><br />
Subject: Compare and contrast physics and chemistry<br />
Posted: Mon Jan 08, 2007 4:26 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Can anyone help my daughter compare and contrast physics and chemistry? She was asked this as part of her Physical Science homework. The book tells her the two main branches of Physical Science are chemistry and physics but it pretty much stops there with no exlanations on what either is. ????
<br />
<br />
She is also having difficulty comparing and contrasting precision and accuracy.
<br />
<br />
Thanks in advance for any help you can give her!
</span><br />
Math :: Diagonalizable matrix
http://sci4um.com/post-325770.html#325770
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17018" target="_blank">aline</a><br />
Subject: Diagonalizable matrix<br />
Posted: Wed Nov 29, 2006 3:08 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">A=[0 0 0 0
<br />
a 0 0 0
<br />
0 b 0 0
<br />
0 0 c 0]
<br />
<br />
Can this matrix by diagonalizable?
<br />
There is only one eigenvalue with order of multiplicity 4. So we need the dimension of the nullspace of A to be 4, so that A is a diagonalizable matrix.
<br />
I found that this is true just in case a=b=c=0. But this really confusing me...Am I right?
</span><br />
Math :: Linear operator and determinant
http://sci4um.com/post-325769.html#325769
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17018" target="_blank">aline</a><br />
Subject: Linear operator and determinant<br />
Posted: Wed Nov 29, 2006 2:37 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Hi, I am having trouble with the following exercise.
<br />
<br />
1-Let V be the vector space of all nxn matrices over the field of
<br />
complex numbers, and let B be a fixed nxn matrix over C. Define a
<br />
linear operator M_B on V by M_B(A) = BAB*, where B* is the conjugate transpose of B. Show that det M_B = |det B|^{2n}.
<br />
<br />
2-H is the set of all Hermitian matrices in V, A being Hermitian if
<br />
A=A*.Then H is a vector space over IR.Show that the function T_B
<br />
defined by T_B(A)=BAB* is a linear operator on H, and that
<br />
detT_B=|det B|^{2n}.
<br />
<br />
I know that the determinant of M_B is equal to that of the matrix P representing M_B .Can I find this matrix?
<br />
For part 2) I know how to show that T_B is a linear operator, and
<br />
then I guess I have to find det T_B= det M_B....
</span><br />
Recreational :: Traveling around Europe
http://sci4um.com/post-325766.html#325766
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=17015" target="_blank">gabrielj</a><br />
Subject: Traveling around Europe<br />
Posted: Tue Nov 28, 2006 8:03 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Hi 2 all
<br />
I am going to go to Italy, but i have no idea which part of of Italy to start with
<br />
Can you advise me something ?
<br />
Perhaps you have been to this country, if yes, where exactly and which hotels did you stay?
<br />
Lots of thanks
</span><br />
Electrochem :: can anyone help me complete this voltage cell
http://sci4um.com/post-325752.html#325752
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16960" target="_blank">Howard610</a><br />
Subject: can anyone help me complete this voltage cell<br />
Posted: Wed Nov 22, 2006 12:07 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">I have a problem where i have to write an equation for a cell containing Zinc metal(Zn) and a solution of ZnSO4. on the other side, i have an inert electrode in a solution of NaClO3. Im having a hard time determing what ox/redux reaction takes place on the side with the inert electrode and a solution of NaClO3.
<br />
<br />
thanks
</span><br />
Probability :: Probability Question
http://sci4um.com/post-325692.html#325692
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16893" target="_blank">dumont</a><br />
Subject: Probability Question<br />
Posted: Mon Oct 23, 2006 3:38 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">I have the following homework problems and need help please.
<br />
<br />
PROBLEM:
<br />
Let X be a binomial random variable with parameters N=8 and p=0.4 and let Y be a continuous uniform random variable defined on the interval (0,4). Furthermore, X and Y are independent.
<br />
<br />
a. Calculate the mean and variance of X
<br />
b. Calculate the mean and variance of Y
<br />
c. Compute the probability that X is greater than the mean of Y
<br />
<br />
PROBLEM:
<br />
Define the random variable Z=2X - Y
<br />
d. Calculate the range of values for Z. That is, determine a and b such that "a<=Z<=b"
<br />
e. Calculate the mean and variance of Z
</span><br />
Math :: Help me plaese with this equation..
http://sci4um.com/post-325675.html#325675
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16845" target="_blank">Rjames2</a><br />
Subject: Help me plaese with this equation..<br />
Posted: Fri Oct 13, 2006 3:23 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">p(x)x*y+g(y)x*y'+f(x,y)x*y"=k can some please help figure out how to find y when k is the constant.... <img src="http://sci4um.com//images/smiles/icon_cry.gif" alt="Crying or Very sad" border="0" /> i fell asleep in class...
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Electromagnetics :: Wavelengths, Frequency and Geometry
http://sci4um.com/post-325653.html#325653
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16750" target="_blank">harmonic</a><br />
Subject: Wavelengths, Frequency and Geometry<br />
Posted: Sun Sep 24, 2006 5:30 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">The fortuitous identification of a unique dimension set, and part of its meaning, led to a simple equation group that meshes wavelengths, frequencies and Euclidean geometry. The dimension set is the length 47.713 cm at an angle of 26.25400 degrees.
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The small pdf article illustrates the simplest way to arrive at Ce, but I did it first using the above dimension set.
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<a href="http://vip.ocsnet.net/~ancient/EuclideanUnits-TheBasics.pdf" target="_blank">http://vip.ocsnet.net/~ancient/EuclideanUnits-TheBasics.pdf</a>
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I am unaware of anyone having used wavelengths and frequencies as elements of a right triangle. I have found no text books to describe how to use them nor which descriptive terms are appropriate to use with them.
<br />_________________<br />Particle physicists are a specialized form of energy.</span><br />
Relativity :: Emergence of Lorentz invariance in condensed matter
http://sci4um.com/post-325649.html#325649
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16735" target="_blank">app02drm</a><br />
Subject: Emergence of Lorentz invariance in condensed matter<br />
Posted: Thu Sep 21, 2006 10:10 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Hi Everyone.
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I've been reading Volovik's book 'The Universe in a Helium Droplet' and wondered if someone who knows more than I can explain something to me.
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He says throughout the book that Lorentz invariance emerges in the low-energy corner. I was wondering exactly how this comes about, for example, I can't see anywhere a proof that the O(1,3) group emerges.
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Basically, I was wondeing if someone could explain how it comes about, how it is proved to be Lorentz invariance and where I can find a definative proof that it is Lorentz invariance.
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Thanks
</span><br />
Research :: Emergence of Lorentz invariance in condensed matter
http://sci4um.com/post-325648.html#325648
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16735" target="_blank">app02drm</a><br />
Subject: Emergence of Lorentz invariance in condensed matter<br />
Posted: Thu Sep 21, 2006 9:52 am (GMT 0)<br />
Topic Replies: 1<br /><br />
<span class="postbody">Hi Everyone.
<br />
<br />
I've been reading Volovik's book 'The Universe in a Helium Droplet' and wondered if someone who knows more than I can explain something to me.
<br />
<br />
He says throughout the book that Lorentz invariance emerges in the low-energy corner. I was wondering exactly how this comes about, for example, I can't see anywhere a proof that the O(1,3) group emerges.
<br />
<br />
Basically, I was wondeing if someone could explain how it comes about, how it is proved to be Lorentz invariance and where I can find a definative proof that it is Lorentz invariance.
<br />
<br />
Thanks
<br />
<br />
app02drm
</span><br />
Math :: Help with Boolean Algebra Questions!!!
http://sci4um.com/post-325612.html#325612
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16707" target="_blank">mcbivens@umes.edu</a><br />
Subject: Help with Boolean Algebra Questions!!!<br />
Posted: Thu Sep 14, 2006 6:58 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">i need help simplifying this expresion:
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(x+y)([x][z] + z)([[y] + xz])
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[ ]= means that theres a bar on top of the variable
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[[y] + xz] = means that there is a bar over the y and another bar on top of the whole expression (y +xz).
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Sorry for the confusion I'm really bad at explaining math equations and if you have any questions please ask me
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also im new to boolean algebra and i have no idea how to do this
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i would like for someone to fully explain this please <img src="http://sci4um.com//images/smiles/icon_sad.gif" alt="Sad" border="0" />
</span><br />
Math :: Help with Boolean Algebra Questions!!!
http://sci4um.com/post-325611.html#325611
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16707" target="_blank">mcbivens@umes.edu</a><br />
Subject: Help with Boolean Algebra Questions!!!<br />
Posted: Thu Sep 14, 2006 6:58 pm (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">i need help simplifying this expresion:
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<br />
(x+y)([x][z] + z)([[y] + xz])
<br />
<br />
<br />
[ ]= means that theres a bar on top of the variable
<br />
<br />
[[y] + xz] = means that there is a bar over the y and another bar on top of the whole expression (y +xz).
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<br />
Sorry for the confusion I'm really bad at explaining math equations and if you have any questions please ask me
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also im new to boolean algebra and i have no idea how to do this
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i would like for someone to fully explain this please <img src="http://sci4um.com//images/smiles/icon_sad.gif" alt="Sad" border="0" />
</span><br />
Math :: Estimating Errors in Measuring Volume
http://sci4um.com/post-325581.html#325581
Author: <a href="http://sci4um.com//profile.php?mode=viewprofile&u=16651" target="_blank">arguani</a><br />
Subject: Estimating Errors in Measuring Volume<br />
Posted: Tue Aug 29, 2006 2:11 am (GMT 0)<br />
Topic Replies: 0<br /><br />
<span class="postbody">Estimating Errors in Measuring Volume
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Consider an experimental procedure to measure the average volume of M&M Peanut candies. One hundred piece of the candy are poured into a graduated cylinder with a 30 diameter. The cylinder is then filled with 1 mm diameter beads and shaken so that the beads and candies pack as tightly as possible. Finally, the candies are removed and the change in volume noted.
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Compute the change in estimated volume if 0.1 mm dia beads were used in place of the 1 mm dia beads. Can you define a relationship that estimates the change in estimated volume of the candies based on the diameter of the beads used in the measurement?
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Can any one help me with this?
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Thanks
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arguani
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