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discretization of wave equation ("technical")
October 26th 2010, 07:21 AM #1
discretization of wave equation ("technical")
I have a question regarding the discretization of the wave equation.
Consider the wave equation in one dimension for a function $u(x,t)$
$\frac{d^2u}{dt^2}=\alpha^2 \frac{d^2u}{dx^2}$
... | {"url":"http://mathhelpforum.com/differential-equations/161038-discretization-wave-equation-technical.html","timestamp":"2014-04-18T22:05:55Z","content_type":null,"content_length":"32722","record_id":"<urn:uuid:ac94e7fe-6371-4fa8-a81c-faede7316075>","cc-path":"CC-MAIN-2014-15/segments/1397609538110.1/warc/CC-MAIN-20140... |
Pelham Manor, NY Calculus Tutor
Find a Pelham Manor, NY Calculus Tutor
...The TAKS exam is very similar to the upper level ISEE exam. It too consists of verbal and mathematical sections. The math sections also include information about learning sequences.
15 Subjects: including calculus, chemistry, physics, geome... | {"url":"http://www.purplemath.com/Pelham_Manor_NY_calculus_tutors.php","timestamp":"2014-04-21T04:43:13Z","content_type":null,"content_length":"24281","record_id":"<urn:uuid:101d0bbe-5bbe-4904-928b-394b48a367e6>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00332-ip-10-147-4-33.ec2.i... |
rotation matrices
September 25th 2011, 06:24 AM
rotation matrices
Hi, I am trying to find some rotation matrices of $R^3$.
So for angle $\frac{\pi}{2}$ and axis $e_2$ I think the rotation matrix is
$R_{e_2} (\frac{\pi}{2}) = \left(\begin{matrix} cos(\frac{\pi}{2}) &0 &sin(\frac{\pi}{2})\\0 &1 &0\\-sin(\frac... | {"url":"http://mathhelpforum.com/advanced-algebra/188778-rotation-matrices-print.html","timestamp":"2014-04-18T15:28:32Z","content_type":null,"content_length":"10276","record_id":"<urn:uuid:d4b42942-3db3-4d54-ada4-7fcdb0a9046e>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00361-ip-1... |
Independent Subspace Analysis Is Unique, Given Irreducibility
Gutch, Harold W. and Theis, Fabian J. (2007) Independent Subspace Analysis Is Unique, Given Irreducibility. In: Davies, Mike E. and James, Christopher J., (eds.) Independent Component Analysis and
Signal Separation. 7th International Conference, ICA 2007, Lo... | {"url":"http://epub.uni-regensburg.de/16856/","timestamp":"2014-04-17T01:01:45Z","content_type":null,"content_length":"30158","record_id":"<urn:uuid:bc52c0a2-6de5-49c7-88c9-e8e8e6460f79>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00355-ip-10-147-4-33.ec2.internal.warc.gz"} |
infinity, in mathematics, that which is not finite; it is often indicated by the symbol ∞art/infinity.gif. A sequence of numbers, a [1], a [2], a [3],…, is said to "approach infinity" if the
numbers eventually become arbitrarily large, i.e., are larger than some number, N, that may be chosen at will to be a million, a ... | {"url":"http://www.factmonster.com/encyclopedia/science/infinity.html","timestamp":"2014-04-16T05:19:41Z","content_type":null,"content_length":"21732","record_id":"<urn:uuid:8fd03cfa-1a9e-4e2c-a49b-35e88943c981>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00541-ip-10-147-4-33.ec2.i... |
line equation
February 18th 2007, 11:13 AM #1
Nov 2006
line equation
cannot work this thing out ...
6400 bricks have been delivered to a site by the first day of a brick laying contract. subsequently 1600 bricks are delivered daily.
brick laying commences on the first day and proceeds regularly, the bri... | {"url":"http://mathhelpforum.com/pre-calculus/11708-line-equation.html","timestamp":"2014-04-16T16:07:00Z","content_type":null,"content_length":"33379","record_id":"<urn:uuid:b3d41a7f-74a2-48ac-ba86-151347cd26f4>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00600-ip-10-147-4-33.ec2.... |
Ted Bunn’s Blog
Stephen Hawking says that we shouldn’t try to contact aliens, lest they come and attack us for our resources:
Hawking believes that contact with such a species could be devastating for humanity.
He suggests that aliens might simply raid Earth for its resources and then move on: "We only have to ... | {"url":"http://blog.richmond.edu/physicsbunn/2010/04/","timestamp":"2014-04-16T13:03:29Z","content_type":null,"content_length":"48667","record_id":"<urn:uuid:22759800-3824-4ab4-b234-d991bd91b9f7>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00118-ip-10-147-4-33.ec2.internal.warc.gz"... |
Herding Cats: Quote of the Day - More Statistics for Decision Making
The notion that we can make decisions about the future without somehow knowing the possible behaviours we will encounter in this future is naive at best and is doomed to fail at worse. Here's some
advice from others on this topic.
• The only certain... | {"url":"http://herdingcats.typepad.com/my_weblog/2013/09/quote-of-the-day-more-statistics-for-decision-making.html","timestamp":"2014-04-21T15:45:15Z","content_type":null,"content_length":"64862","record_id":"<urn:uuid:ae7bf11a-cdf1-4aed-97c7-20e7ac460a4b>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-M... |
Burtonsville Geometry Tutor
...I teach students to: (1) consider the audience; (2)develop a theme and supporting ideas; (3) enrich the content with memorable stories, facts, and other materials that engage the audience; and
(4) practice a comfortable delivery. I have taught grades 4-12. Two things help a child feel... | {"url":"http://www.purplemath.com/Burtonsville_Geometry_tutors.php","timestamp":"2014-04-19T00:00:53Z","content_type":null,"content_length":"24180","record_id":"<urn:uuid:af4b231e-7391-4a23-abc2-bbf4135756dd>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00064-ip-10-147-4-33.ec2.inte... |
From Encyclopedia of Mathematics
A formula of the language of propositional calculus taking the truth value "true" independently of the truth values "true" or "false" taken by its propositional variables. Examples:
In general one can check whether a given propositional formula is a tautology by simply examining the fin... | {"url":"http://www.encyclopediaofmath.org/index.php/Tautology","timestamp":"2014-04-19T09:38:04Z","content_type":null,"content_length":"15758","record_id":"<urn:uuid:3b1c3f05-9fa2-4883-9f92-6c0b6b3a1cc3>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00203-ip-10-147-4-33.ec2.internal.... |
The Economics of Pest Control
The scientific study of pests and pest control strategies is often called economic entomology in recognition of the financial impact insects have on industry, agriculture, and human society in
general. To be sure, economically important insects are not always pests; we have already stresse... | {"url":"http://www.cals.ncsu.edu/course/ent425/library/tutorials/applied_entomology/economics_pest_control.html","timestamp":"2014-04-20T23:45:02Z","content_type":null,"content_length":"32594","record_id":"<urn:uuid:de9ec2cb-88ea-4d80-bcd7-075e40c7c53e>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN... |
Isotropic crystal and energy band
The problem is that there are no isotropic crystals. Even cubic crystals are only symmetric with respect to four and threefold rotations about some special axes. However this is sufficient to render
second order (but not higher order) tensors isotropic.
Do you mean that using the isotr... | {"url":"http://www.physicsforums.com/showthread.php?s=06ba088eaf7340c2c7091f47f6aacc65&p=4569662","timestamp":"2014-04-19T04:41:28Z","content_type":null,"content_length":"28423","record_id":"<urn:uuid:99fd8863-bf0b-4a43-a0cd-e5411e23c256>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140416005215... |
I am trying to figure out the most appropriate MPI calls for a certain portion of my code. I will describe the situation here:
Each cell (i,j) of my array A is being updated by a calculation that depends on the values of 1 or 2 of the 4 possible neighbors A(i+1,j), A(i-1,j), A(i,j+1), and A(i,j-1). Say, for example, ... | {"url":"http://www.open-mpi.org/community/lists/devel/att-11990/attachment","timestamp":"2014-04-19T23:21:19Z","content_type":null,"content_length":"3358","record_id":"<urn:uuid:08b7a486-2dc9-4ced-b852-df8f6ecf5fa3>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00287-ip-10-147-4-33.e... |
Bronx ACT Tutor
Find a Bronx ACT Tutor
...Sound interesting? I coach students in three core areas: 1) High school coursework: Mathematics, Physics, Biology 2) Standardized testing: SAT Mathematics (general, and subject tests); 3)
Competitions: Science Fair and Model UN Send me a message describing your needs, and I... | {"url":"http://www.purplemath.com/bronx_act_tutors.php","timestamp":"2014-04-19T02:13:15Z","content_type":null,"content_length":"23492","record_id":"<urn:uuid:2f8eb730-6d53-4bee-9707-bc463db8ce8b>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00530-ip-10-147-4-33.ec2.internal.warc.gz"... |
Math Resources
Note: I only link to pages that I use myself. If you want a page with dozens of math-related links, you could just do a Google search on "math"; I'm being selective to avoid overwhelming people with
too many choices. But the fact that I haven't linked to a page doesn't mean I think badly of it.
Some of t... | {"url":"http://www.millersville.edu/~bikenaga/math-resources.html","timestamp":"2014-04-21T12:16:33Z","content_type":null,"content_length":"7813","record_id":"<urn:uuid:7092afe2-dce0-4b4f-872a-1fd1a8ef13b0>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00431-ip-10-147-4-33.ec2.interna... |
another DE problem (well more of a parts prob)
June 7th 2007, 10:45 AM #1
Junior Member
Jun 2007
another DE problem (well more of a parts prob)
Me agian, catch up on my DE HW...(150ish DE's in 4days
Question: x^2(dy/dx) + x(x+2)y = e^x
I have found roe (p) and now im trying to intergrate the right side.... | {"url":"http://mathhelpforum.com/calculus/15731-another-de-problem-well-more-parts-prob.html","timestamp":"2014-04-18T07:11:11Z","content_type":null,"content_length":"54882","record_id":"<urn:uuid:6a603c66-8f0a-456a-a65a-2deb3eea299c>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-003... |
When Should Potentially False Research Findings Be Considered Acceptable?
Ioannidis estimated that most published research findings are false [1], but he did not indicate when, if at all, potentially false research results may be considered as acceptable to society. We
combined our two previously published models [2,3]... | {"url":"http://www.plosmedicine.org/article/info:doi/10.1371/journal.pmed.0040026","timestamp":"2014-04-18T06:24:54Z","content_type":null,"content_length":"120581","record_id":"<urn:uuid:b7cfbf2e-b384-4424-a23c-90dff7f18a82>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00622-ip-10-14... |
Licensed to: iChapters User 7th edition College Algebra and Trigonometry College Algebra and Trigonometry Richard N. Aufmann Vernon C. Barker Richard D. Nation 7th edition Cengage Learning developed
and published this special edition for the benefit of students and faculty outside the United States and Canada. Content m... | {"url":"http://www.doocu.co/pdf/search/soalan+integer+matematik+tingkatan+2","timestamp":"2014-04-18T12:20:04Z","content_type":null,"content_length":"71519","record_id":"<urn:uuid:1e50df53-39a6-42a1-b3e2-45f053d5deca>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00105-ip-10-147-4-33... |
Siu decomposition
up vote 0 down vote favorite
hello. I have the following question: Let $T$ be a positive closed current of bidimension $(p,p)$ then one has the Siu decomposition $T=R+S$ where $R$ is a positive closed current such that its
Lelong number is zero along analytic sets of dimension greater or equal $p$. No... | {"url":"http://mathoverflow.net/questions/69621/siu-decomposition/69676","timestamp":"2014-04-17T12:38:30Z","content_type":null,"content_length":"65870","record_id":"<urn:uuid:2b5283e2-c410-4816-9139-6926c9f43844>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00394-ip-10-147-4-33.ec2... |
Graterford, PA Algebra 1 Tutor
Find a Graterford, PA Algebra 1 Tutor
...All of my students have seen grade improvement within their first two weeks of tutoring, and all of my students have reviewed me positively. Through WyzAnt, I have tutored math subjects from
prealgebra to precalculus; I have also tutored Englis... | {"url":"http://www.purplemath.com/Graterford_PA_algebra_1_tutors.php","timestamp":"2014-04-18T04:21:22Z","content_type":null,"content_length":"24347","record_id":"<urn:uuid:c5bc4ac4-4dee-4f8c-ae26-624d286f59da>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00025-ip-10-147-4-33.ec2.in... |
Compute the roots of a polynomial.
Return the roots (a.k.a. “zeros”) of the polynomial
c : 1-D array_like
Parameters :
1-D array of polynomial coefficients.
out : ndarray
Returns :
Array of the roots of the polynomial. If all the r... | {"url":"http://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.polynomial.polynomial.polyroots.html","timestamp":"2014-04-19T05:20:23Z","content_type":null,"content_length":"10207","record_id":"<urn:uuid:7b46874d-a9b7-48ec-8dea-197a672e65d1>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-2014... |
[Numpy-discussion] Tuning sparse stuff in NumPy
Robert Cimrman cimrman3@ntc.zcu...
Tue Mar 27 12:27:32 CDT 2007
David Koch wrote:
> Ok,
> I did and the results are:
> csc * csc: 372.601957083
> csc * csc: 3.90811300278
a typo here? which one is csr?
> csr * csc: 15.3202679157
> csr * csr: 3.84498214722
> Mhm, quite in... | {"url":"http://mail.scipy.org/pipermail/numpy-discussion/2007-March/026841.html","timestamp":"2014-04-18T01:22:26Z","content_type":null,"content_length":"3561","record_id":"<urn:uuid:ba79d91c-3014-46e6-8e8b-8f0762ed8957>","cc-path":"CC-MAIN-2014-15/segments/1397609532374.24/warc/CC-MAIN-20140416005212-00516-ip-10-147-4... |
c05rbc Solution of a system of nonlinear equations using first derivatives (easy-to-use)
c05rcc Solution of a system of nonlinear equations using first derivatives (comprehensive)
c05rdc Solution of a system of nonlinear equations using first derivatives (reverse communication)
c05zdc Check user's function for calculat... | {"url":"http://www.nag.com/numeric/CL/nagdoc_cl23/pdf/INDEXES/KWIC/derivative.html","timestamp":"2014-04-18T00:45:21Z","content_type":null,"content_length":"7100","record_id":"<urn:uuid:7c847134-a629-4eb1-99af-270b5089c3ef>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00139-ip-10-14... |
I think I can read it correctly. In latex (when it works again) $\int_{0}{1} \sqrt{9+4t^2}dx$. In easier to read type: int sqrt(9+4t^2)dt, evaluated from 0 to 1. Before I do this, have you studied
trig substitution, because if you haven't this might be slightly difficult to get at first?
i know some trig identities if ... | {"url":"http://mathhelpforum.com/calculus/11717-antiderivative.html","timestamp":"2014-04-20T04:53:03Z","content_type":null,"content_length":"40170","record_id":"<urn:uuid:be6a8db3-4782-4980-92d5-9962f79b26d9>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00464-ip-10-147-4-33.ec2.int... |
Spherical Measures without Spherical Trigonometry
A common misconception suggests that it is necessary to understand spherical trigonometry in order to calculate properties of a spherical surface. That this is false can be demonstrated by deriving
the formula for distance and direction on a sphere without any knowledge... | {"url":"http://www-personal.umich.edu/~copyrght/image/solstice/win01/tobler/tobler.html","timestamp":"2014-04-18T18:15:02Z","content_type":null,"content_length":"11606","record_id":"<urn:uuid:1fd79c93-0dfb-4c91-8529-3ddab078a50d>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00010-ip-... |
st: re: how to run zandrews as a postestimation command
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st: re: how to run zandrews as a postestimation command
From Kit Baum <baum@bc.edu>
To statalist@hsphsun2.harvard.edu
Subject st: re: how to run zandrews as a postestimation command... | {"url":"http://www.stata.com/statalist/archive/2008-04/msg00690.html","timestamp":"2014-04-16T13:29:08Z","content_type":null,"content_length":"6767","record_id":"<urn:uuid:b3650d3f-e3cb-4f1a-90be-63f675846916>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00281-ip-10-147-4-33.ec2.int... |
Satisfying a Zeta Jones
For a vivid picture of prime fetishism, check out Chris Caldwell's encyclopedic and surprisingly addictive Prime Pages (www.utm.edu/research/primes). Among the contents: a list of the largest known
primes (updated weekly), a primality test for numbers smaller than 2^53 - 1, and abundant prime tr... | {"url":"http://www.villagevoice.com/2003-04-15/art/satisfying-a-zeta-jones/2/","timestamp":"2014-04-20T17:21:58Z","content_type":null,"content_length":"110555","record_id":"<urn:uuid:4d1067dc-d817-4571-a9a5-93e9a242e332>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00332-ip-10-147-4... |
Comments on It's the Top Talent that Helps You WinBob Morris commented on 'It's the Top Talent that Helps You Win'
TypePad 2009-07-24T20:11:12Z Gerhard Gschwandtner http://blog.sellingpower.com/gg/ tag:typepad.com,2003:http://blog.sellingpower.com/gg/2009/07/mondays-video/comments/atom.xml/
tag:typepad.com,2003:6a0115... | {"url":"http://blog.sellingpower.com/gg/2009/07/mondays-video/comments/atom.xml","timestamp":"2014-04-20T23:28:37Z","content_type":null,"content_length":"3456","record_id":"<urn:uuid:35fdf42e-216a-4196-82a0-86dd1b7ed9e6>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00284-ip-10-147-4-... |
Glendale, CO SAT Math Tutor
Find a Glendale, CO SAT Math Tutor
...I especially love working with students who have some fear of the subject or who have previously had an uncomfortable experience with it.I have taught Algebra 1 for many years to middle and
high school students. We have worked on applications and how... | {"url":"http://www.purplemath.com/Glendale_CO_SAT_Math_tutors.php","timestamp":"2014-04-21T00:16:49Z","content_type":null,"content_length":"24036","record_id":"<urn:uuid:009df911-1aaf-4686-adbc-9328f12f9735>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00293-ip-10-147-4-33.ec2.inter... |
Next: Maximum Group Velocity Up: Applications in Vibrational Mechanics Previous: Longitudinal and Torsional Waves
The equations of motion of a stiff plate are the (2+1)D generalization of those of a beam. We assume the plate to lie, when at rest, in the plane, and to be of thickness ; the deflection of the plate
from i... | {"url":"https://ccrma.stanford.edu/~bilbao/master/node172.html","timestamp":"2014-04-24T22:13:50Z","content_type":null,"content_length":"22690","record_id":"<urn:uuid:d6c755ba-303a-47ac-a61a-2b513bf3a1cb>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00008-ip-10-147-4-33.ec2.internal.... |
so... n/(n+1) = 1-[1/(n+1)] ?
I have tried to work out the proof of this myself, but I can't seem to get the two to equal each other/manipulate the first to equal the second.
Could someone point me towards what i have to do to the first fraction? Should be an easy thing but I can't put my finger on it.
The easier way o... | {"url":"http://www.physicsforums.com/showpost.php?p=3818005&postcount=4","timestamp":"2014-04-16T13:54:40Z","content_type":null,"content_length":"8426","record_id":"<urn:uuid:87060ccd-5e4a-4507-8b5f-8115982612b4>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00343-ip-10-147-4-33.ec2.... |
${\bf METHOD}$ ${\bf 1}$
First she applied Brahmagupta's formula for the area of a quadrilateral:
$ \delta = \sqrt{(s - a)(s - b)(s - c)(s - d) - abcd \cos^2 \beta}$
where $ s = \frac{1}{2}(a + b + c + d)$ and $\beta = \frac{1}{2}(A + C)$ or $ \frac{1}{2}(B + D)$.
Hence the area is clearly the greatest when $abcd \cos^... | {"url":"http://nrich.maths.org/317/solution?nomenu=1","timestamp":"2014-04-19T17:08:37Z","content_type":null,"content_length":"5473","record_id":"<urn:uuid:254d014b-cdd5-4008-b4fa-cd410f57ad20>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00473-ip-10-147-4-33.ec2.internal.warc.gz"} |
OpenGL SDK: Simple Tessellation Shader
OpenGL SDK: Simple Tessellation Shader
By Evan Hart, posted Jan 10 2013 at 01:52PM
In the last OpenGL SDK post I introduced the new SDK, now let me introduce our first new sample, “Simple Tessellation Shader”. As the name implies, it demonstrates the minimum parts necessary to us... | {"url":"https://developer.nvidia.com/content/opengl-sdk-simple-tessellation-shader?display[%24ne]=defaultnppnppnsight-visual-studio-edition-22-new-featurestegra-hardware-sales-inquiries","timestamp":"2014-04-23T15:22:13Z","content_type":null,"content_length":"26609","record_id":"<urn:uuid:e553ff82-cab5-4f5d-a728-a5a907... |
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Mathematical explanations come in two general varieties: mathematical explanations of mathematical facts and mathematical explanations of physical facts, henceforth called internal and external
explanations respectively. The debate in internal explanations boils down to identifying and understanding the difference ... | {"url":"http://cms.math.ca/Reunions/hiver11/abs/hpm.html","timestamp":"2014-04-16T16:13:24Z","content_type":null,"content_length":"25645","record_id":"<urn:uuid:c3f80bbd-64d6-4d52-bfd8-6f46495ddffa>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00109-ip-10-147-4-33.ec2.internal.warc.... |
Biomechanics is the science concerned with the internal and external forces acting on the human body and the effects produced by these forces.
Kinematics is the branch of biomechanics about the study of movement with reference to the amount of time taken to carry out the activity.
Distance and displacement
Distance (le... | {"url":"http://www.brianmac.co.uk/biomechanics.htm","timestamp":"2014-04-20T11:54:31Z","content_type":null,"content_length":"34703","record_id":"<urn:uuid:c97db785-52a6-4f25-8958-e0b5b00dfc21>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00206-ip-10-147-4-33.ec2.internal.warc.gz"} |
Efficiency Measurements of Portable-Handset Antennas
Authors: Darioush Agahi, William Domino
Conexant Systems Inc.
Newport Beach, CA
Note: This article originally appeared in the June 2000 edition of "Applied Microwave & Wireless" (now out of print) Both authors now work for Skyworks Solutions Inc.
In the design of wir... | {"url":"http://www.rfcafe.com/references/articles/Efficiency-Measurement-Antenna-Wheeler-Cap.htm","timestamp":"2014-04-19T04:24:51Z","content_type":null,"content_length":"46466","record_id":"<urn:uuid:7148193d-17ac-4bef-be4a-4ec2b7e722c9>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002... |
st: Interpretation of interaction term in log linear (non linear) model
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and
[Date Prev][Date Next][Thread Prev][Thread Next][Date ... | {"url":"http://www.stata.com/statalist/archive/2013-06/msg00321.html","timestamp":"2014-04-16T13:32:46Z","content_type":null,"content_length":"9933","record_id":"<urn:uuid:78b335d5-50a6-4a82-9654-8c6422a6a3ea>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00620-ip-10-147-4-33.ec2.int... |
Existence of Primitive Roots
December 7th 2011, 10:32 PM #1
Super Member
Feb 2008
Existence of Primitive Roots
By definition, the positive integers that have a primitive root are 2, 4 and integers of the form $p^t$ and $2p^t$ where p is a prime and t is a positive integer.
Then why does 16 NOT have a primit... | {"url":"http://mathhelpforum.com/number-theory/193749-existence-primitive-roots.html","timestamp":"2014-04-18T12:11:00Z","content_type":null,"content_length":"31757","record_id":"<urn:uuid:a26804ea-8b32-4db9-9e7b-d04648c62928>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00122-ip-10... |
April 2
In the
last post
we saw that Rpython-to-LLVM can be 200X faster than Python in a tight loop. What happens when the loop gets more complicated? This next test introduces a Vector class, and using a new decorator, the
LLVM backend can translate instances of this class into the
optimized LLVM vector type.
@rpy.vec... | {"url":"http://pyppet.blogspot.com/2012_04_01_archive.html","timestamp":"2014-04-18T19:31:52Z","content_type":null,"content_length":"85668","record_id":"<urn:uuid:37767d0c-d106-4b40-a168-ef0a92e4bdee>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00599-ip-10-147-4-33.ec2.internal.warc... |
Summary: COMPLEXITY: Exercise No. 6
due in two weeks
1. (Test 99)Consider the following problem:
Input: Sets S 1 ; : : : ; S k ` N where jS i j = 3 for all i.
Goal: Find a set I ` f1; 2; : : : ; kg with maximum size such that S i `` S j = OE for all i; j 2 I.
Give a polynomial time approximation algorithm to this probl... | {"url":"http://www.osti.gov/eprints/topicpages/documents/record/402/3766080.html","timestamp":"2014-04-20T16:24:24Z","content_type":null,"content_length":"8124","record_id":"<urn:uuid:99f39fd2-2d8f-45d1-af5a-44ecd91e3816>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00405-ip-10-147-... |
shlomif / project-euler - b287af6
Add the notes for euler_188.
+The hyperexponentiation or tetration of a number a by a positive integer b, denoted by a↑↑b or ba, is recursively defined by:
+Thus we have e.g. 3↑↑2 = 33 = 27, hence 3↑↑3 = 327 = 7625597484987 and 3↑↑4 is roughly 103.6383346400240996*10^12.
Tip: Filter by... | {"url":"https://bitbucket.org/shlomif/project-euler/commits/b287af69e02e0f05dbd6f2b6a45ed8a371d9d1d0?at=default","timestamp":"2014-04-20T03:33:13Z","content_type":null,"content_length":"62980","record_id":"<urn:uuid:1d94e469-4b18-4983-9c36-97bde6e05486>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN... |
Mod(%) operator
Author Mod(%) operator
Ranch Hand
Joined: Jan 05,
Posts: 477 When taking y value as 0 in i1,it gives y1 as true.(0==0).When taking y value as 1 in i1,1 mod 2====>1/2=quotient 0.5 and r... | {"url":"http://www.coderanch.com/t/404536/java/java/Mod-operator","timestamp":"2014-04-19T12:54:38Z","content_type":null,"content_length":"27603","record_id":"<urn:uuid:f31b5137-ba3e-4689-bada-71af9e7185b3>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00278-ip-10-147-4-33.ec2.intern... |
Chapter 3. Exercises
In this exercise you have to solve a given task. Therefore you have to enter the integer part of a fraction and the numerator and the denominator. The difficulty of the generated task can be adjusted
by using some options on the left.
There are several parameters which influence the difficulty of t... | {"url":"http://docs.kde.org/stable/en/kdeedu/kbruch/exercises.html","timestamp":"2014-04-20T05:46:15Z","content_type":null,"content_length":"10481","record_id":"<urn:uuid:c6484fe1-ff0a-4747-997b-2f0a6c39271d>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00370-ip-10-147-4-33.ec2.inte... |
Learning the Unscented Kalman Filter - File Exchange - MATLAB Central
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Comments and Ratings (56)
11 Very good example!
28 This contribution can be used as an optimizer but is not very e... | {"url":"http://www.mathworks.com/matlabcentral/fileexchange/18217-learning-the-unscented-kalman-filter","timestamp":"2014-04-20T06:07:31Z","content_type":null,"content_length":"71993","record_id":"<urn:uuid:bfe74eba-66e4-4cf7-822e-9bef02f98cf6>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416... |
AutoSignal: Tutorials - Spectral Analysis of unevenly spaced data
This tutorial covers the spectral analysis capabilities of AutoSignal when the data are unevenly spaced. The main focus will be upon Fourier procedures that use data that have not been uniformly
sampled. A secondary focus will be upon interpolation proce... | {"url":"http://www.sigmaplot.com/products/autosignal/tutorials/tutorial3.php","timestamp":"2014-04-20T18:23:06Z","content_type":null,"content_length":"37012","record_id":"<urn:uuid:235eb731-f78c-4ca7-b21f-5458dc197ddb>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00146-ip-10-147-4-3... |
Prove that all integers are of the form...
February 5th 2010, 05:21 AM #1
Feb 2010
Prove that all integers are of the form 3k, 3k+1, or 3k+2
The problem is clearly easy and it's obvious why this is true, but I just don't understand how exactly to go about proving it...help?
Because the reminder of divis... | {"url":"http://mathhelpforum.com/number-theory/127297-prove-all-integers-form.html","timestamp":"2014-04-19T22:28:00Z","content_type":null,"content_length":"35333","record_id":"<urn:uuid:394005a2-776f-4aa0-a7aa-f625e9c769fa>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00050-ip-10-1... |
Lines, Sines, and Curve Fitting 8 - D'Agostino
> Lines, Sines, and Curve Fitting 8 – D'Agostino
Lines, Sines, and Curve Fitting 8 – D'Agostino
2011 January 16
The eyeball and quick sigma population checks in the previous post provided some confidence that the global temperature anomalies are normally distributed over t... | {"url":"https://rhinohide.wordpress.com/2011/01/16/lines-sines-and-curve-fitting-8-dagostino/","timestamp":"2014-04-17T07:17:24Z","content_type":null,"content_length":"24785","record_id":"<urn:uuid:36e86ed7-2d06-48dd-94c0-e95b7a86c013>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00... |
Math Forum Discussions
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Topic: RE: [mg18963] Packed Arrays in version 4
Replies: 1 Last Post: Aug 5, 1999 2:29 AM
Messages: [ P... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=232432&messageID=781230","timestamp":"2014-04-17T18:39:43Z","content_type":null,"content_length":"20867","record_id":"<urn:uuid:62e1e961-aa77-4be3-b0d2-d8a31e77f924>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00462-ip-10-147-4-3... |
, Computer Networking
Encoding process, Computer Networking
Encoding Process
c= uG
u: binary data sequence of length 4( input)
G: Generator matrix which is 7*4
c: Codeword
Decoding Process
s= rH^T
r: received data sequence ... | {"url":"http://www.expertsmind.com/questions/encoding-process-30134746.aspx","timestamp":"2014-04-18T23:15:51Z","content_type":null,"content_length":"31083","record_id":"<urn:uuid:7474e63e-8c97-40fa-8089-596e3d7b054b>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00295-ip-10-147-4-33.... |
188 helpers are online right now
75% of questions are answered within 5 minutes.
is replying to Can someone tell me what button the professor is hitting...
• Teamwork 19 Teammate
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Thanks... | {"url":"http://openstudy.com/users/vinrar/answered","timestamp":"2014-04-19T02:04:15Z","content_type":null,"content_length":"104359","record_id":"<urn:uuid:f6edfd70-f735-4f8f-ac27-28d16b661388>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00039-ip-10-147-4-33.ec2.internal.warc.gz"} |
Greedy Algorithm for license purchase problem
November 15th 2008, 09:19 PM #1
Feb 2008
Your friends are starting a security company that needs to obtain licenses for
n different pieces of cryptographic software. Due to regulations, they can only obtain these licenses at the rate of at most one per month.
... | {"url":"http://mathhelpforum.com/discrete-math/59768-greedy-algorithm-license-purchase-problem.html","timestamp":"2014-04-17T22:38:20Z","content_type":null,"content_length":"32656","record_id":"<urn:uuid:bff28305-5777-4868-9c1a-a1a4b63590d1>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005... |
Closest Pair in the Plane with (2,4)-trees
Web Page and Applets by Sam Sanjabi
Presented to Prof. Godfried Toussaint
The Closest Pair problem consists of finding a pair of points p and q from a set of n points such that the p and q are at a minimum distance from each other.
The brute force solution to this problem take... | {"url":"http://www.cs.mcgill.ca/~cs251/ClosestPair/index.html","timestamp":"2014-04-17T06:42:51Z","content_type":null,"content_length":"2564","record_id":"<urn:uuid:f1fe4bf2-cfb9-414d-80de-01ff9fe5a620>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00097-ip-10-147-4-33.ec2.internal.w... |
Quantization and Non-holomorphic Modular Forms (Lecture Notes in Mathematics Vol. 1742)
von Andre Unterberger
Kategorie: Distributionentheorie
ISBN: 3540678611
Kurzbeschreibung This is a new approach to the theory of non-holomorphic modular forms, based on ideas from quantization theory or pseudodifferential analysi... | {"url":"http://www.uni-protokolle.de/buecher/isbn/3540678611/","timestamp":"2014-04-21T04:44:10Z","content_type":null,"content_length":"6701","record_id":"<urn:uuid:73bc4741-a424-4583-82b0-eace68fb9faf>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00586-ip-10-147-4-33.ec2.internal.w... |
The Math Teacher's Resource Site
This picture inspires a wonderful volume project, and can easily have scientific notation and proportions integrated into the project as well.
(1) Have students calculate the volume of the Earth.
(2) Research the amount of water that’s on the Earth (about 326 million trillion gallons ... | {"url":"http://algebrafunsheets.com/blog/tag/proportions/","timestamp":"2014-04-17T15:26:50Z","content_type":null,"content_length":"39243","record_id":"<urn:uuid:02e4fc73-8b78-4fb6-80a8-3bc44711a6ae>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00592-ip-10-147-4-33.ec2.internal.warc.... |
Berkeley, CA Precalculus Tutor
Find a Berkeley, CA Precalculus Tutor
...My teaching methodology is to aid my students in developing an intuition that will allow them to easily tackle complex problems, understand underlying principles, and independently overcome
difficulties when faced with challenging material. Fee... | {"url":"http://www.purplemath.com/Berkeley_CA_Precalculus_tutors.php","timestamp":"2014-04-19T15:13:29Z","content_type":null,"content_length":"23861","record_id":"<urn:uuid:859630d4-4b4b-4810-9f43-067c41416d25>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00138-ip-10-147-4-33.ec2.in... |
Hobbits and Prime Ministers: The Physics of DoorsHobbits and Prime Ministers: The Physics of Doors
Over at Tor.com, Kate has begun a chapter-by-chapter re-read of The Hobbit, and has some thoughts on Chapter 1. It’s full of interesting commentary about characters and literary technique, but let’s
get right to the impor... | {"url":"http://scienceblogs.com/principles/2012/11/16/hobbits-and-prime-ministers-the-physics-of-doors/","timestamp":"2014-04-16T22:06:11Z","content_type":null,"content_length":"99608","record_id":"<urn:uuid:8de1bf22-a8a8-4379-be0a-6a62e77a0693>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416... |
st: RE: using the first n observations in a dataset w/o evaluating the w
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st: RE: using the first n observations in a dataset w/o evaluating the whole thing?
From "Kieran McCaul" <kamccaul@meddent.uwa.edu.au>
To <statalist@hsphsun2.harvar... | {"url":"http://www.stata.com/statalist/archive/2008-04/msg00189.html","timestamp":"2014-04-18T01:26:36Z","content_type":null,"content_length":"7414","record_id":"<urn:uuid:0908a94c-1aea-45ea-93b5-cba5c86a64d9>","cc-path":"CC-MAIN-2014-15/segments/1397609532374.24/warc/CC-MAIN-20140416005212-00596-ip-10-147-4-33.ec2.int... |
Whole numbers and integers pls help
Kidzworld Help
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Need help with math, geography, science or any other school work? Post your questions here! Or maybe you are an expert. Share you knowledge here.
Whole numbers and integers pls help
Could someone explain me negative integers?Please help.
Whole numbers and... | {"url":"http://www.kidzworld.com/forums/homework-help/t/1021830-whole-numbers-and-integers-pls-help","timestamp":"2014-04-19T16:04:51Z","content_type":null,"content_length":"81100","record_id":"<urn:uuid:b07ec047-c896-44e0-a31c-926720c13ff6>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005... |
Prime Factors
• Knowing rules for divisibility by 2, 3, 4, 5, 9 and 10 can be very helpful in finding the prime factorization of numbers.
• When students seek to find the prime factorization of a number like 48, the process will be quicker and probably easier for them if they start with the composite factors like 6... | {"url":"http://www.eduplace.com/math/mathsteps/5/b/5.primefact.tips.html","timestamp":"2014-04-16T16:16:20Z","content_type":null,"content_length":"5965","record_id":"<urn:uuid:42f3e25b-4b56-4e85-9568-826ef672c433>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00354-ip-10-147-4-33.ec2... |
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Topic: Why does m = slope?
Replies: 5 Last Post: Dec 2, 2004 5:30 PM
Messages: [ Previous | Next ]
Why... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=369902","timestamp":"2014-04-20T21:52:29Z","content_type":null,"content_length":"22322","record_id":"<urn:uuid:18e62dfc-1cab-4323-abaf-f06f60e5dd45>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00365-ip-10-147-4-33.ec2.internal.wa... |
Measures of Central Tendency
Measures of central tendency are numbers that tend to cluster around the “middle” of a set of values. Three such middle numbers are the mean, the median, and the mode.
For example, suppose your earnings for the past week were the values shown in Table 1.
You could express your daily earning... | {"url":"http://www.cliffsnotes.com/math/statistics/numerical-measures/measures-of-central-tendency","timestamp":"2014-04-20T08:23:23Z","content_type":null,"content_length":"169078","record_id":"<urn:uuid:6fe21fbb-4b7b-43e2-bc08-69a8f341c5bc>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032... |
Algebra 1 Tutors
West Bloomfield, MI 48322
Master Certified Coach for Exam Prep, Mathematics, & Physics
...I look forward to speaking with you and to establishing a mutually beneficial arrangement in the near future! Best Regards, Brandon S.
Algebra 1
covers topics such as linear equations, systems of linear equations... | {"url":"http://www.wyzant.com/Detroit_MI_algebra_1_tutors.aspx","timestamp":"2014-04-20T21:12:34Z","content_type":null,"content_length":"62237","record_id":"<urn:uuid:1a4f3745-5b1c-4d68-b1a2-4fb12739f2a9>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00388-ip-10-147-4-33.ec2.internal... |
Temecula Algebra 1 Tutor
Find a Temecula Algebra 1 Tutor
...My philosophy is that in order to help a student understand their problem areas, you must first understand how the student learns and gear the lesson/tutoring to the students style in order for
them to comprehend the information that is being presented to ... | {"url":"http://www.purplemath.com/Temecula_algebra_1_tutors.php","timestamp":"2014-04-19T23:40:35Z","content_type":null,"content_length":"23930","record_id":"<urn:uuid:aa7e6b34-9b14-4860-a77f-df631cf77f7e>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00411-ip-10-147-4-33.ec2.interna... |
A fresh look at testing for asynchronous communication
Testing is one of the fundamental techniques for verifying if a computing system conforms to its specification. Developing an efficient and exhaustive test suite is a challenging problem, especially
in the setting of distributed systems. We take a fresh look at the... | {"url":"http://www.newton.ac.uk/programmes/LAA/gastin.html","timestamp":"2014-04-18T15:44:41Z","content_type":null,"content_length":"3067","record_id":"<urn:uuid:1c870d41-461b-4731-a754-7421daf097b8>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00334-ip-10-147-4-33.ec2.internal.warc... |
Verifying solutions with partial derivatives.
I have no idea how to do these two questions. I know you have to take partial derivatives with respect to certain variables and the like. Basically I understand the concepts to some degree but I
wouldn't know how to go about starting. If anyone can give me a starting push t... | {"url":"http://www.physicsforums.com/showthread.php?p=3513373","timestamp":"2014-04-19T15:04:24Z","content_type":null,"content_length":"20601","record_id":"<urn:uuid:830809f4-2e56-4603-9b2b-872a14014fd4>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00147-ip-10-147-4-33.ec2.internal.w... |
Bayes' Theorem
Ever wonder what happens to those amazing breakthroughs you hear about on the news, but never hear about again? Somehow, when they're finally released, the amazing qualities of, say, that new wonder
drug, never seem to reduce the suffering the way most people hoped.
Look through the reports on the test ... | {"url":"http://headinside.blogspot.com/2012/11/bayes-theorem.html","timestamp":"2014-04-21T14:59:06Z","content_type":null,"content_length":"658323","record_id":"<urn:uuid:32ad9ffc-c687-46e9-8387-f676a741ae5a>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00488-ip-10-147-4-33.ec2.inter... |
Numbers part one: Integers from the Course PHP with MySQL Essential Training
Start learning with our library of video tutorials taught by experts. Get started
PHP is a popular, reliable programming language at the foundation of many smart, data-driven websites. This comprehensive course from Kevin Skoglund helps develo... | {"url":"http://www.lynda.com/MySQL-tutorials/Numbers-part-one-Integers/119003/136943-4.html?w=0","timestamp":"2014-04-20T04:29:43Z","content_type":null,"content_length":"245319","record_id":"<urn:uuid:9df225e9-bbaa-4f1a-b2a1-f047bfb58915>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN-20140416005217... |
Results 1 - 10 of 21
"... The theme of this paper is profunctors, and their centrality and ubiquity in understanding concurrent computation. Profunctors (a.k.a. distributors, or bimodules) are a generalisation of
relations to categories. Here they are first presented and motivated via spans of event structures, and the... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=1623748","timestamp":"2014-04-20T07:03:35Z","content_type":null,"content_length":"41034","record_id":"<urn:uuid:7448d079-e377-4194-ad23-2d4a286977a3>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00270-ip-10-147-4-33.ec2.internal.wa... |
Some distance properties of latent root and vector methods used in multivariate analysis
Results 1 - 10 of 110
, 1997
"... Image rendering maps scene parameters to output pixel values; animation maps motion-control parameters to trajectory values. Because these mapping functions are usually multidimensional,
nonlinear,... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=161079","timestamp":"2014-04-18T12:05:35Z","content_type":null,"content_length":"39815","record_id":"<urn:uuid:fd23c390-6c83-4b80-90ec-fb24719f06cc>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00013-ip-10-147-4-33.ec2.internal.war... |
almost function
almost function
In measure theory, an almost-everywhere-defined function, or almost function, is a partial function whose domain is a full set. We are usually only interested in measurable almost functions.
Typically, we consider almost functions up to the equivalence relation of almost equality, whereb... | {"url":"http://ncatlab.org/nlab/show/almost+function","timestamp":"2014-04-18T20:48:35Z","content_type":null,"content_length":"14152","record_id":"<urn:uuid:762fc10b-5c15-41a3-ace3-5588337c04f6>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00054-ip-10-147-4-33.ec2.internal.warc.gz"} |
Standardizing regression inputs by dividing by two standard deviations - Statistical Modeling, Causal Inference, and Social Science
Standardizing regression inputs by dividing by two standard deviations
Interpretation of regression coefficients is sensitive to the scale of the inputs. One method often used to place inp... | {"url":"http://andrewgelman.com/2006/06/21/standardizing_r/","timestamp":"2014-04-20T20:58:47Z","content_type":null,"content_length":"22077","record_id":"<urn:uuid:2579d100-be86-4d24-9610-dc2a925edffb>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00216-ip-10-147-4-33.ec2.internal.wa... |
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3(x + 1) + 6 = 33
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Your quest... | {"url":"http://openstudy.com/updates/50930a57e4b0b86a5e52f38b","timestamp":"2014-04-16T13:41:36Z","content_type":null,"content_length":"41833","record_id":"<urn:uuid:a1fd6432-49cc-4423-8186-e214e4ee89c3>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00653-ip-10-147-4-33.ec2.internal.... |
Behavioural Investing
In my last post I questioned the long term relevance of some of the fundamental factors outlined in the Navellier's Little Book that makes you rich. However, I also noted that all eight of these
factors only add up to a 30% weight in his final analysis. The other 70% is given to what Navellier cal... | {"url":"http://behaviouralinvesting.blogspot.com/2007_11_01_archive.html","timestamp":"2014-04-17T15:49:56Z","content_type":null,"content_length":"42483","record_id":"<urn:uuid:41d59949-763a-48ca-bd2e-17f0c975792f>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416005210-00184-ip-10-147-4-33.ec2... |
Lesson 23: Integer Exponents
To motivate the convention for negative and zero exponents, the lesson begins by observing the halving pattern found in continuously decreasing the exponent of a power of two by 1. After an
application looking at the formula for Body Mass Index calculation, power functions of the form f(x) ... | {"url":"http://www.curriki.org/xwiki/bin/view/Coll_Group_SanDiegoCommunityCollegesDevelopmentalMathExchange/Lesson23IntegerExponents?bc=;Coll_Group_SanDiegoCommunityCollegesDevelopmentalMathExchange.IntermediateAlgebra;Coll_Group_SanDiegoCommunityCollegesDevelopm","timestamp":"2014-04-16T21:52:43Z","content_type":null,... |
Finding an intersect
October 17th 2011, 05:43 AM #1
Oct 2011
Finding an intersect
Hi guys,
I'm trying to find the intersect between a linear function and a power (fractal) function. I thought all this would require is a simple bit of algebra. I've since broken my and several friends'
heads over it and w... | {"url":"http://mathhelpforum.com/algebra/190582-finding-intersect.html","timestamp":"2014-04-19T20:41:36Z","content_type":null,"content_length":"44595","record_id":"<urn:uuid:a21214f1-f5b1-4b6e-94bc-68cd09082a08>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00144-ip-10-147-4-33.ec2.... |
Fractional partial differential equations and modified Riemann-Liouville derivative new methods for solution
Find out how to access preview-only content
Fractional partial differential equations and modified Riemann-Liouville derivative new methods for solution
Purchase on Springer.com
$39.95 / €34.95 / £29.95*
Rent th... | {"url":"http://link.springer.com/article/10.1007%2FBF02832299","timestamp":"2014-04-24T11:47:17Z","content_type":null,"content_length":"55523","record_id":"<urn:uuid:4724a60c-f623-4bdf-903c-d4700618c064>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00205-ip-10-147-4-33.ec2.internal.w... |
[SciPy-user] Array selection help
Jose Luis Gomez Dans josegomez@gmx....
Wed Feb 11 09:03:15 CST 2009
> >> scipy.ndimage.mean(arr2, labels=arr1, index=np.unique(arr1))
> >
> > True. The question is, how do I get the output of your code back into my
> > original array? Presumably, there's another function that does that... | {"url":"http://mail.scipy.org/pipermail/scipy-user/2009-February/019877.html","timestamp":"2014-04-17T19:08:29Z","content_type":null,"content_length":"3780","record_id":"<urn:uuid:907e5c04-22e5-43d4-b379-4f005466b984>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00450-ip-10-147-4-33... |
... Review of Trig Ratios Worksheet 2: 8 introduces the trig ratios of sine, cosine, and ... So sin 1 a=means sin=a The same rule applies to cos 1 a and t an 1 a. If you wish towrite ...
Sine Cosine Rules Mark scheme
Sine Cosine Rules Mark scheme 1. (a) 27.6 3 sin30 8.1 sin 7.5 B 8.1 7.5sin 30 ... A1 7.83 7.84 OR M1 fo... | {"url":"http://www.cawnet.org/docid/sine+rule+and+cosine+rule+worksheets/","timestamp":"2014-04-18T10:39:57Z","content_type":null,"content_length":"57058","record_id":"<urn:uuid:564dd0bd-ffc8-416e-9951-693c290be7d5>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00455-ip-10-147-4-33.e... |
free online math tutorial for grade 11
Best Results From Yahoo Answers Youtube
From Yahoo Answers
Question:Is there anything thats is free online where i can go over the whole grade 11 math course, so i can get ahead in class. its ontario,canada math MCR 3UG functions grade 11 university prep im
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October 14th 2008, 03:48 AM
Given a triangle ABC, Let A',B',C' be midpoints of [BC],[CA] and [AB], respectively:
a) Consider L element of BC-{B,C}, M element of CA-{C,A}, N element of AB-{A,B} such that AL,BM,CN are concurrent if P,Q,R are respective midpoints of [AL], [BM],[Cn] prove that
PA',QB',RC' are c... | {"url":"http://mathhelpforum.com/geometry/53611-midpoints-print.html","timestamp":"2014-04-23T16:32:05Z","content_type":null,"content_length":"3416","record_id":"<urn:uuid:95ab535b-01bb-469b-a1c5-ff1059807e21>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00643-ip-10-147-4-33.ec2.inte... |
The Michelson Interferometer
For the same reason, any observer placed in the system's center O and using a radar signal would find by timing the echoes that all A, B, C and D distances are the same.
However, he would not notice that the four radar echoes are two times longer becaus... | {"url":"http://www.rhythmodynamics.com/Gabriel_LaFreniere/sa_Michelson.htm","timestamp":"2014-04-20T05:47:36Z","content_type":null,"content_length":"85956","record_id":"<urn:uuid:bed11638-0be5-4546-ab8e-5bf81149f42e>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00394-ip-10-147-4-33.... |
A Numerical Model for Railroad Freight Car-to-Car End Impact
Discrete Dynamics in Nature and Society
Volume 2012 (2012), Article ID 927592, 11 pages
Research Article
A Numerical Model for Railroad Freight Car-to-Car End Impact
School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China
Rece... | {"url":"http://www.hindawi.com/journals/ddns/2012/927592/","timestamp":"2014-04-20T18:47:45Z","content_type":null,"content_length":"158976","record_id":"<urn:uuid:b330c3c1-0154-4967-b2b3-cc50aad9ac4d>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00326-ip-10-147-4-33.ec2.internal.war... |
[Haskell-cafe] Rational and % operator remix
Ryan Ingram ryani.spam at gmail.com
Mon Mar 30 13:21:52 EDT 2009
2009/3/30 michael rice <nowgate at yahoo.com>:
> I'm still not sure what some of the error messages I was getting were about.
> As I wrote the function I tried to be aware of what "mixed mode" operations
> were... | {"url":"http://www.haskell.org/pipermail/haskell-cafe/2009-March/058943.html","timestamp":"2014-04-24T06:24:24Z","content_type":null,"content_length":"4184","record_id":"<urn:uuid:0788f723-4ef8-4d44-b029-e91255a79a6a>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00562-ip-10-147-4-33.... |
Patent application title: dB-LINEAR VOLTAGE-TO-CURRENT CONVERTER
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A dB-linear voltage-to-current (V/I) converter that is amenable to implementation in CMOS technology. In a representative embodiment, the dB-linear V/... | {"url":"http://www.faqs.org/patents/app/20100194443","timestamp":"2014-04-19T03:33:26Z","content_type":null,"content_length":"64414","record_id":"<urn:uuid:d68438ef-339e-4c2e-bb31-27c4df4f706f>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00564-ip-10-147-4-33.ec2.internal.warc.gz"} |
Downey, CA Trigonometry Tutor
Find a Downey, CA Trigonometry Tutor
...Three of my SAT Math II students this past year were boarding school students in Russia; I tutored these girls remotely via Skype-esque video conferencing and advanced document mark-up &
screen-sharing. AL of my students saw their SAT Math II sco... | {"url":"http://www.purplemath.com/Downey_CA_Trigonometry_tutors.php","timestamp":"2014-04-18T23:57:54Z","content_type":null,"content_length":"24274","record_id":"<urn:uuid:00c2c184-4f61-4d83-af56-78f275e1c65c>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00071-ip-10-147-4-33.ec2.inte... |
The rows of this unitary matrix form an orthonormal set but the columns don't. Why?
September 8th 2013, 02:54 PM #1
Super Member
Nov 2008
The rows of this unitary matrix form an orthonormal set but the columns don't. Why?
The rows of this ( {{1/3 - 2/3i,2/3i},{-2/3i,-1/3-2/3i}} - Wolfram|Alpha ) unitary matrix ... | {"url":"http://mathhelpforum.com/advanced-algebra/221826-rows-unitary-matrix-form-orthonormal-set-but-columns-don-t-why.html","timestamp":"2014-04-16T09:14:40Z","content_type":null,"content_length":"38186","record_id":"<urn:uuid:585a7d57-b028-4d66-937c-555107124c68>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13... |
piecewise function
August 9th 2009, 11:05 PM #1
Junior Member
Aug 2009
Let y be a piecewise function given by
y(r) =kr^2 − m, if r ≤ R;
−2kR^3 / r, if r > R
for some (k,m, r,R > 0) ∈ R. This function represents the gravitational potential of the Earth.
Find the values of k for which y is continu... | {"url":"http://mathhelpforum.com/calculus/97531-piecewise-function.html","timestamp":"2014-04-19T13:05:55Z","content_type":null,"content_length":"51023","record_id":"<urn:uuid:2c353f1a-29a0-43d4-803c-a6325a1beab1>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00566-ip-10-147-4-33.ec2... |
UBC Mathematics Department
Colloquium Abstract: Professor Walter Rudin, Department of Mathematics, University of Wisconsin-Madison
Analytic aspects of the Bohr Topology
If G is an abelian group, then G^# denotes G equipped with the weakest topology that makes every character of G continuous. This is the Bohr topology o... | {"url":"http://www.math.ubc.ca/Dept/Events/colloquia/rudin.html","timestamp":"2014-04-18T03:22:01Z","content_type":null,"content_length":"1481","record_id":"<urn:uuid:762a70ff-1f20-401d-9535-4c5eae2ae8d3>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00106-ip-10-147-4-33.ec2.internal... |
Tech Briefs
Improved Contact Solutions and Traction Calculations
In the previous versions of ADINA, contact surfaces are identified by linear segments. For improved accuracy, in particular when quadratic elements are used, the actually-interpola... | {"url":"http://www.adina.com/newsgC37.shtml","timestamp":"2014-04-18T11:20:07Z","content_type":null,"content_length":"15567","record_id":"<urn:uuid:dbeee1db-d932-49d7-af4e-8e34884c9053>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00510-ip-10-147-4-33.ec2.internal.warc.gz"} |
This is the command window for XPPAUT. Click for a fullsize image.
The data viewer, equation window, initial data window, and parameter window.
This is a
and the
for a planar
ODE along
with the
sets in blue
and purple.
An integrable system colored according to energy levels.
The famous Lorenz equations projected... | {"url":"http://www.math.pitt.edu/~bard/xpp/ss/screen.html","timestamp":"2014-04-20T05:42:04Z","content_type":null,"content_length":"4449","record_id":"<urn:uuid:5becca9f-9b20-4d1b-b97c-c04d12c2cfb9>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00205-ip-10-147-4-33.ec2.internal.warc.... |
Collision polynomials
up vote 5 down vote favorite
Consider $P_n(x)$ polynomials defined through the recurrence relations $$P_n(x)=2(1-x)P_{n-1}(x)-(1+x)^2P_{n-2}(x),$$ with $P_0(x)=1$ and $P_1(x)=1-3x$. In fact, the explicit solution of these
recurrence relations is given by the formula $$P_n(x)=\frac{1}{2}\left[ (1+i... | {"url":"http://mathoverflow.net/questions/137719/collision-polynomials","timestamp":"2014-04-20T03:42:55Z","content_type":null,"content_length":"60162","record_id":"<urn:uuid:accfe902-cfad-4b7e-8c33-b8f7b37ada9e>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN-20140416005217-00006-ip-10-147-4-33.ec2.... |
Reinhold Baer
Born: 22 July 1902 in Berlin, Germany
Died: 22 October 1979 in Zurich, Switzerland
... | {"url":"http://www-history.mcs.st-and.ac.uk/Biographies/Baer.html","timestamp":"2014-04-20T20:59:01Z","content_type":null,"content_length":"32287","record_id":"<urn:uuid:e881c0be-59f5-42b2-9646-b39930bd5481>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00225-ip-10-147-4-33.ec2.inter... |
Law of an application
March 14th 2010, 08:40 AM #1
Law of an application
I'm currently reading a paper, and I'm having difficulties in grasping the concept of a tree, and more precisely this :
Let $\mathbb{T}~:~ \Omega \to\Omega$ be the identity application.
Let $(p_k,k\geq 0)$ be a probability.
There e... | {"url":"http://mathhelpforum.com/advanced-statistics/133745-law-application.html","timestamp":"2014-04-19T02:23:49Z","content_type":null,"content_length":"70528","record_id":"<urn:uuid:56c0a9d2-9ea5-4364-b7cc-c922bf4eeda8>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00316-ip-10-147-... |
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Topic: Proposed Schema for Double Induction
Replies: 4 Last Post: Jul 18, 2013 12:00 PM
Messages: [ Pre... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2582530&messageID=9173351","timestamp":"2014-04-17T01:10:48Z","content_type":null,"content_length":"21151","record_id":"<urn:uuid:4b640d79-ac2e-4a20-ae1c-629c80872a82>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00359-ip-10-147-4-... |
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Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course ... | {"url":"http://www.coursehero.com/file/6241383/ELE204-MT22006-7/","timestamp":"2014-04-16T04:33:59Z","content_type":null,"content_length":"48356","record_id":"<urn:uuid:e57c78d5-4ea6-4c83-b0a9-70d430b6f201>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00653-ip-10-147-4-33.ec2.intern... |
Graph of a function
February 22nd 2009, 12:04 AM #1
Junior Member
Feb 2009
List all the asymptotes of the graph of the function and the approximate coordinates of each local extremum.
I've had a hard time trying to solve this graph , I used my graphing calculator, but it didn't help me.
Acording to my b... | {"url":"http://mathhelpforum.com/calculus/74961-graph-function.html","timestamp":"2014-04-19T05:36:04Z","content_type":null,"content_length":"33965","record_id":"<urn:uuid:c0a5833e-332a-486b-bd40-37e51142577c>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140416005215-00548-ip-10-147-4-33.ec2.int... |
Cauchy's Integral theorem
March 18th 2010, 05:47 AM
Cauchy's Integral theorem
Quick question
im trying to calculate the integral around the closed curve C of
z(bar) dz where z(bar) is the complex conjugate of z
where C is the unit circle.
Using the subsitution z = e^it i calculated the integral to b... | {"url":"http://mathhelpforum.com/calculus/134435-cauchys-integral-theorem-print.html","timestamp":"2014-04-20T20:18:33Z","content_type":null,"content_length":"4025","record_id":"<urn:uuid:19f685cb-1439-4f47-b499-3ccfeb1345d6>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00318-ip-10-... |
The Mathematics of Marriage
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Hardcover | $50.00 Short | £34.95 | ISBN: 9780262072267 | 500 pp. | 6 x 9 in | December 2002
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Essential Info
The Mathematics of Marriage
Divorce rates are at an all-time h... | {"url":"https://mitpress.mit.edu/books/mathematics-marriage","timestamp":"2014-04-20T21:59:58Z","content_type":null,"content_length":"45815","record_id":"<urn:uuid:3210407c-cd00-48d2-81bd-5e0ce03d10a0>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00384-ip-10-147-4-33.ec2.internal.wa... |
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A triangle has side lengths of 12 cm, 15 cm, and 20 cm. Classi... | {"url":"http://openstudy.com/updates/511559fce4b09e16c5c7fcc3","timestamp":"2014-04-17T01:39:19Z","content_type":null,"content_length":"72704","record_id":"<urn:uuid:2ffe7e96-dca7-4d41-b034-971036edd2c6>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00429-ip-10-147-4-33.ec2.internal.... |