Loops Definition and 262 Threads

I have a very simple question, but have been unable to find an answer for it. When using fortran 90 can you use a DO loop to calculate a complex number? For example: [code] COMPLEX FUNCTION forwards (tincdum,tstartdum,tenddum,fdum,ydum,idum,wdum&...

Homework Statement A roller coaster begins with a steep downhill descent followed by a vertical loop. How much higher does the initial hill have to be to than the height of the loop so that the riders experience a force of 1G keeping them in their seats at the top of the loop? Assume that...

So, what are the theories' predictions which are going to be tested on LHC? And if they won't be found, Does it mean they will be refuted or not?

Homework Statement Write a program that will roll a pair of six-sided dice (int variables named redDie and blueDie) and will give you 5 points every time you roll doubles (pair of 2s, 3s, 4s, and 5s) and 10 points if you roll snake-eyes (pair of 1s) or boxcars (pair of 6s). Run your program...

Homework Statement The figures below show two different situations where a current may be induced in a loop according to Faraday's Law, with the direction given by Lenz' Law. The magnetic field is shown by the x's in Fig. 2. Select ALL correct answers (i.e. B, AC, BCD) for the current in the...

Homework Statement show that the forces between two current loops obey Newtons 3rd law. Homework Equations \textbf{F}_{12}=\frac{\mu I_{1}I_{2}}{4 \pi s^{2}} d\textbf{r}_{1}\times(d\textbf{r}_{2}\times \textbf{s}) s is the distance between the elements of current The Attempt at a Solution...

The emf given -\frac {d \Phi}{dt} produces a non conservative field right? Then is it right to use Kirchoff's loops rule in the circuit? Also if a coil with self induction L, is kept in a constant magnetic field perpendicular to the plane of the coil, and the flux associated through the coil...

Hello! I'm experimenting with classes in C++. It works fine for now, but there is something I can't find an explanation for. I tried to develop a 'matrix' class, and I overloaded some operators in order to define addition or multiplication for matrices. This works like a charm, except for the...

Homework Statement There is a cross-section wire or radius R with a uniform current density j flowing through it. There is a hole in the wire's cross section (a vacuum) a distance b away from the centre of the cross section. The hole has radius a. What is the magnetic field B in the hole as a...

http://www.fuw.edu.pl/~kostecki/zakopane08/ Last year about this time there was a Zakopane Quantum Gravity School, we got some great pictures reports and comment from Francesca, F-H, Alejandro Satz, and also the main coordinator Richard Kostecki posted some here at PF about it. Zakopane is a...

Homework Statement You have a 1.1-m-long copper wire.You want to make an N-turn current loop that generates a 1.66 mT magnetic field at the center when the current is 1.01 A. You must use the entire wire. What will be the diameter of your coil? Homework Equations The Attempt at a...

Homework Statement In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 200 loops, is 2.67 V. The emf induced in coil 2 is 3.78 V. How many loops does coil 2 have? Homework Equations E=-N(delta Phi/delta t)...

Im curious if anyone knows if it is theoretically possible to place the human mind into an infinite loop in a similar manner to the placing an electronic computer into one. If not, why? What is principle physical/neurological process that prevents this from occurring?

Applying the Biot-Savart eq'n for inside a current loop is pretty simple to find the magnetic field inside a current loop. But how would one find the magnetic field outside of one?

Given the curvature of space-time, are all lines through space also loops? If so, are the loops always circular? If the loops are not always circular, what determines the shape of the loops?

http://www.matmor.unam.mx/eventos/loops07/talks/PL5/Smolin.pdf http://www.matmor.unam.mx/eventos/loops07/talks/PL5/Smolin.mp3 The Loops 07 website continues gradually posting the slides and audio of the talks and several very interesting new ones are now online as of 14 August. I just...

Let be a classical particle with Hamiltonian \pi _{t}-p^{2}-V(x)=0 can we describe the QM version of it (particle under the influence of a potential) using 'Loops' instead of Waves ?? i mean, although this is a toy model can we apply 'Quantum Loops' to solve the problem ??

Alejandro Satz blog has comment on Reuter's Loops '07 talk Also several people have remarked about what Reuter had to say in his lectures at the Zakopane QG school earlier this year. It made a big impression on the grad students there. I have listened to his Loops '07 talk several times while...

http://www.matmor.unam.mx/eventos/loops07/ click on "program"

How can I wind magnetic wire around a half sphere so that I end up with closed loops? How can I wind magnetic wire around a half sphere so that I end up with individual closed loops? There may be a better way to accomplish this so any suggestions would help a great deal. The way I would...

The dates are already set June 30 - July 4, 2008 This time it will be correctly called the Conference on Quantum Geometry and Quantum Gravity---more accurate than just saying "Loops"--- and will be hosted at the University of Nottingham. http://www.maths.nottingham.ac.uk/qg/Meetings.html...

Registration deadline for Loops '07 is coming up deadline for early registration is 25 April late registration in May. Looks like most splendid Loops conference yet (even includes string as a small auxilliary sub-department :smile: See Rozali's talk further down the page) TOPICS COVERED *...

Homework Statement The 10-turn loop of wire shown in the figurelies in a horizontal plane, parallel to a uniform horizontal magnetic field, and carries a 2.0 A current. The loop is free to rotate about a nonmagnetic axle through the center. A 50 g mass hangs from one edge of the loop...

Homework Statement Well the only thing the problem gives is 210 V Homework Equations Q=VC series Q=Q=Q.. V+V=V 1/C=1/C+1/C.. parallel Q+Q+Q.. V=V=V.. C+C+C.. around a loop the voltage is zero. The Attempt at a Solution Now I have no where to begin. I can see three...

Homework Statement Hi. I sort of doubt that anyone will reply to this post since it is a MATLAB problem, but ill give it a shot. I am trying to write a MATLAB function that will graph the logistic map. Homework Equations x(n+1) = r*xn*(1-xn) (1) The inputs are r, x0...

Hey, Im pretty new to c++ so my knowledge is limited. I have been set an assignment to create the following triangles only using Do...While loops. I'm having difficulty trying to code it. The underscores are just their to illustrate spaces. 1 *_________________5 * 5__________* * * * 1 *...

Roller Coaster loops! does anybody know why do roller coasters have more of an oval loop then rounded loop? Thankss

HI I have loops made of 85% platinum and 15% iridium. It brokes down after 3 or 4 steralization cycles (by getting red on Bunsen Burner) please advice reason and solution thanks

I expect this to turn out to be an important non-string QG paper this year. http://arxiv.org/abs/gr-qc/0607014 Particles as Wilson lines of gravitational field L. Freidel, J. Kowalski--Glikman, A. Starodubtsev 19 pages "Since the work of Mac-Dowell-Mansouri it is well known that gravity...

Hey guys, Is there anyone good with MATLAB for loops? I am having trouble with getting an embedded loop within another loop to work. I am trying to vary two parameters and create a surface plot with a third variable as the dependant. What I really need help with is how to get the LHS...

As I attempt to understand the conflict between Quantum Loop Gravity [QLG] and the various types of string theory, I noticed that quantum loops appeared to be very similar to Wilson lines, sometimes called Wilson loops. Speculation: relating [QLG] to twistor string theory [TST]. 1 -...

I'm trying to ascertain if there is any "consensus" on the cause of coronal loops in current theory?

i just can't do loops in pascal. the handout we're given doesn't make any sense, so can someone give a quick guide on how to do it?

I need some help. So far I have some for loops that print the following patters: * ** *** **** ***** ****** ******* ******** ********* ********** and ********** ********* ******** ******* ****** ***** **** *** ** * Here is the code: for(int rows=1;rows<=10;rows++) { for(int...

I am sorry to be bothering you - I am a high school student and I need help with something I don't understand. It is understandable if we think of why magnetic fields form closed loops if we think of the North and the South Poles not being separate from each other. This has been given as a proof...

Help - Loops Currents. :( hey there I'm revising for an exam and i can't really do loop currents i was trying to do this sum http://mathonweb.com/help/backgd4.htm (example2) but kept getting the rong sign for equations (for shared resistors):( could someone please explain to me! thanx in...

I've been reading on cosmic strings lately and discovered that if they exist they could pinch themselves off into tiny closed loops that would evaporate via radiating gravitational waves. What would happen if a straight piece of cosmic string could be created? Say, for this question, it's 4...

go here http://loops05.aei.mpg.de/index_files/Programme.html click on whoever's talk you want to hear Rovelli and Smolin have the SLIDES as well as the recorded talk. the slides (either pdf or powerpoint) are quick to download and give a quick idea of what the talk was about---where it fits...

From Trees to Loops and Back Andreas Brandhuber, Bill Spence, Gabriele Travaglini 49 pages, 17 figures http://www.arxiv.org/abs/hep-th/0510253 We argue that generic one-loop scattering amplitudes in supersymmetric Yang-Mills theories can be computed equivalently with MHV diagrams or with...

"Loops" has become a defacto provisional collective name for all the main efforts to get a nonperturbative backgroundindependent theory of QG. If these approaches are going to coalesce into one broad field of research and have an annual meeting, should it be called Loops '06 like it was this...

http://atdotde.blogspot.com/2005/10/others.html Robert Helling is a string theorist. He is winning the gratitude-for-life of many Loop-fans by blogging live from the Albert Einstein Institute at Potsdam-Golm. Non-perturbative/background independent QG people are, for him, "the Others"...

Dear every one, I'm studying on micromagnetics problem using Brown's equation for static solving case, this equation derived from minimization of energy and it allows us to obtain a hysteresis loop of a magnetic material. All of my documents only say that from Brown's equation, we can...

http://loops05.aei.mpg.de/ it's out

in this page I've encountered this topic (it's a topic from combinatorics, so it's relevant to discrete maths with sets and so on [that's my justification to post it here o:) ), anyway from my point of view the page describes poorly the successor operation: "The resulting sequence of...

In doing my \phi^{3} theory I didn't know exactly how to count the number of loops in a diagram given the number of vertices, internal and external lines. Is there a general algorithm in doing this? What if we have more than one interaction vertex (e.g. the Standard Model)? PS. What does it...

http://loops05.aei.mpg.de/index_files/Home.html October 10-14 at Potsdam, Albert Einstein Institute The aim of this conference is to summarise the status and open problems of the various approaches to quantum gravity and to present new ideas and research directions. "The topics of this...

I've been having trouble with the solution my book (and the solution manual) gives for a problem. Basically, there are two inductors (wire coils): one is on the left, hooked to a battery and a switch. Then there's one to the right of it, hooked to only a resistor. The left switch is closed...

If I generate current through two identical loops (parallel) of transformer wire in the same direction, why do they produce an uniform magnetic field at the centre of the space between the loops ONLY IF the separation distance between the loops is equal to the radius of each coil? and not if...

Is there someone out there who could explain string theory and loop quantum gravity to me in plain English, please? I have no mathematical ability whatsoever, so I'm looking for an explanation of the concepts. Numbers leave me scratching my head. I am not suggesting that my numerical stupidity...

I'm trying to use the improved euler method to calculate the position vector of a rocket on a mission from the Earth to the moon. The method involves calculating new values of acceleration whilst time is incremented and using this IN ADDITION to the previous values of acceleration to find the...