Running Definition and 371 Threads

How can I derive the running coupling for the weak interaction. I have found derivations for QED and QCD that involve the β function http://www.physics.umd.edu/courses/Phys741/xji/chapter1.pdf but I can't find anything specific for the WI. Thanks.

Ben Carson seems to be rising in the polls, and he seems to be running on the issues. I hope he stays on the issues and doesn't resort to negative campaigning against the others running for president. Ben Carson on the issues: Inside the mind of the retired neurosurgeon surging in polls...

Bernie Sanders is drawing large crowds to his rallies and speeches. What’s behind Bernie Sanders’ enormous rallies https://www.physicsforums.com/forums/current-events.20/create-thread He is registered as an independent in Vt. According to the Wikipedia article on him, Sanders is the...

1) While running with a constant velocity ; how do we consume energy? : Only due to vertical movement of our bodies, right? 2) When driving a car in a constant velocity; how this car could consume energy? It does not move upright-downright (in a very straight road).

The beta function is defined as: \beta(\lambda)=M\frac{d}{dM}\lambda If we make the substitution t=ln(p/M) the above equation becomes: \beta(\lambda)=-\frac{d}{dt}\lambda Now if we use e.g. the QED beta function \beta(e)=\frac{e^3}{12\pi^3} and for e(p=M)=e_0 the result is...

Hi guys, I have been searching for references that could tell what are the average limits of impact (in Newtons per example) of running activity into human´s feet (material = bone). Basically the question I am trying to answer is per example to understand how much of linear acceleration...

When a person is running is frictional force forward or backward? I do not have good knowledge of

Donald Trump, today, announced his candidacy for President -- http://edition.cnn.com/2015/06/16/politics/donald-trump-2016-announcement-elections/ -- as was alluded to https://www.physicsforums.com/threads/hillary-clinton-running-for-president.808180/page-4#post-5142830 I saw this thread...

Hi all, I recently installed ubuntu on my pc and I am trying to run the Fermi software provided by NASA (http://fermi.gsfc.nasa.gov/ssc/data/analysis/software/). I believe I did all the installation steps right but I am having trouble starting the software. If you are familiar with this...

Homework Statement This is not homework but I am trying to solve a problem to see to general a set of numbers for the grassmanian equations to use in something else.[/B] I have five variables a,b,c,d,e. a-b,a-c,a-d,a-e,b-a,b-c,...etc so that none of them are the same so it generates all...

Do we have some? I mean, the typical argument voiced each time that someone tries to fit mass patterns against whatever formula is "you should be using running masses", or more precisely "you should be using all the masses renormalised at the same scale". And indeed it is a very logical...

https://www.hillaryclinton.com/ http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=11431624

1. Two wires running parallel to each other in a circuit can provide an inductance that is adjustable with their length. For the loop shown below with length L=2m , width w=5cm , and wire radius a=1mm , find the inductance in H?Homework Equations3. I thought i could find the inductance by...

I was trying to identify which athlete does more work per rep/stride. I am trying to understand how a marathon runner can run sub 6 minute miles under aerobic conditions. To me this seems like a high intensity to I wanted to figure out who was doing more work, producing more force, or if you can...

In the winters, I run on an indoor track, and use a footpod to calculate my distances with my GPS watch. The facility has three lanes, inside #1 is 181.6 meters, middle lane #2 is 187.2 and outside #3 lane is 194.3 meters long. The track is more less rectangular shaped as opposed to a circle...

Hi all! I'm working off of this schematic for a modded Nerf blaster (note: schematic not my own work). I am hoping to hook up a little lipo alarm (http://rcbitz.com.au/images/MiniLipoAlarm.jpg ) somewhere in there to display the voltage of my 1s lipo I'm using to power it. Question: Where...

Hello. I am thinking about creating an extremely lightweight running shoe to simulate barefoot running, and I need help on picking a material for the sole. 1. It has to be cheap 2.It has to be strong 3.No Metal 4.It has to be extremely bendable(able to role up into a tube)

Hey! :o Let the quicksort algorithm be the following: procedure QUICKSORT(S) if S contains at no one element then return S else begin choose an element a randomly from S; let S1, S2 and S3 be the sequences of elements in S less than...

I have been wondering this for a uncomfortable amount of time... Does the universe have a defined tick rate? By tick rate I mean a loop that processes all information and changes in the universe in that moment, similar how a video game or a computer processor work. I was also wondering if that...

Homework Statement m working on a Engineering Project and I'm having serious trouble trying to run this program in C++. I'm following an example of the program from Program done in C but I'm trying to convert it into C++. I'm going to link the example I'm following and what I'm doing trying to...

Hey! :o I have the main function of a program in a .c file. The main function uses data structures which are defined in an other .c file. And the main function uses also a .txt file to get some inputs. Is it possible to run the program if the main function is an other file as the definition...

I am trying to compile several libraries of FORTRAN code and getting the error message as can be seen in the screen shot. As I do not have any experience with FORTRAN I am not sure what is wrong in the line highlighted line. Any help would be greatly appreciated! Thanks a lot! :-)

Hello, I am currently by some reason struggling with this problem. I cannot seem to get the correct reasoning here. I would appreciate any help! 1. Homework Statement Ann and Lisa cross the 100 m finish line at the same time, 10.2 s after start. Both had constant acceleration until they...

I'm trying to grasp some basic concepts of analyzing code segments. Not sure if I have the right thought process. Can't find many examples online. Homework Statement A.) for (i=1; i<n; i++) for (j=1; j<n; j++) return 1 Guess: Theta(n) because both loops go to (n) and they're...

Hi I am a sophmore in high school doing multivariable calculus in a local community college and next semester I will be going into linear algebra with differential equations. The problem is that after differential equations and linear algebra the community college does not have any other math...

I have a question on quantities that 'run' under the renormalization group flow. What's clear is that the properties through which particles couple -- such as charge, isospin, color etc -- change in their strengths as the energy increases. But this running is also true of the mass, which is a...

Homework Statement I am trying to find the expectation value of <x2> of the following function: ψ[(x,t)]=(\frac{2am}{πh})[1/4]e[-a(\frac{mx^2}{h}+it)], where h is hbar and the integral is from -∞ to ∞ Homework Equations <x2>=\intx^2|ψ[(x,t)]|2dx The Attempt at a Solution The resulting...

Dear all, Let me introduce myself first. I am Ilango from India. I am new to Fortran, mostly working on Matlab, Modelica & Dymola. Working in an automobile company I was required to go through some battery models and hence landed at this page. http://www.cchem.berkeley.edu/jsngrp/fortran.html...

As is well known, the charges through which particles interact scale with the energy in QFT. What I was wondering is: can we say that this is a peculiarly 'quantum' phenomenon (or maybe, quantum-relativistic)? Is there a reason why it wouldn't be the case in a classical universe, for example...

Hi, I am planning to run a DC motor using a super capacitor. The specification of the motor are: Voltage : 90V - 120 V DC Current : 15 A Duration : Should run for atleast 10 seconds. I have finalized this super capacitor from maxwell for the above operation...

Just wondering if it's true when people say we will be out of oil in 50 years. If so are there plans to what's going to happen? Any answers are appreciated, thanks.

Error running optimization. Inputs must be a scalar and a square matri I am trying to use fminunc using optimtool. But i got the error Error running optimization. Inputs must be a scalar and a square matrix. this is the function i typed in the editor. function F = fun(x) F =...

Well I am having some difficulty in understanding the running constants... I am not sure if this applies to the Standard Model as well, but I saw that in SUSY recently... If we take the value of the gaugino masses m_{\bar{g}},m_{\bar{W}},m_{\bar{B}} (by bar I mean Gluino,W-ino and B-ino) to be...

Yesterday afternoon I noticed a dog running up and down our street, occasionally wandering through and around neighbor's yards. I'd never seen this dog being walked in the neighborhood before, so I went outside and got it to come into our back yard. I immediately noticed it didn't have a collar...

Increasing the incline on a belt type running machine increases the expenditure of energy of the runner. However the runner is not increasing his/her potential energy in the gravitational field. The only change appears to be in the manner the leg joints and muscles bend, flex, stretch and...

Why are we unable to run faster without hands moving? What's the role of hands for running?

My daughter is doing a science experiment based on a launch loop (http://en.wikipedia.org/wiki/Launch_loop). I hooked a 2600 psi pressure washer to two 1/8" OD tubes and then tethered them to a board. We rolled a tennis ball over the top of it when the water was flowing through the tubes (not...

First post on PF, thought I'd share my first serious attempt at astrophotography. I used itelescope since it's perpetual cloud cover where I'm at sadly, and all of my processing was done in Astroart. I learned a lot with this, but it's definitely an uphill struggle! M42 and the Running Man...

Hi, I had this power electronics lab experiment where we control the speed of a separately excited dc motor using thyristors. The dc motor is rated at 1500 RPM but we do get readings where the speed is above 2500 RPM. How is that possible? Thanks

I love pen and paper but am terrible with computing. I have a copy of MatLab on my computer and aside from the operating system and Word that's about it. I need software that can run primality checks on 'small' gigantic primes of 10,000-20,000 digits in length. Where do I need to start?

Homework Statement Jan and Jorge ran away from a starting point. If Jorge ran 107m South and Jan ran 212m to the southwest, where is Jan relative to Jorge? Homework Equations Inverse cos = adj/hyp sin theta = opp/hypThe Attempt at a Solution Jorge runs directly south and Jan runs southwest. So...

Homework Statement A man decided to run a marathon. (a) What was his average speed, in m/s, for the first 5K? (b) At 5K, was he speeding up or slowing down? Explain. Homework Equations a) change in distance/time b) acceleration = change in velocity/ change in timeThe Attempt at a Solution...

I feel like I am running out of momentum life wise. The last year has been so difficult for me that I see everything different. I still enjoy work and learning, but I don't enjoy school anymore. I have no confidence in myself academically despite actually making some good progress in an idea I...

Lets say we run(forever) with 200km/h and our friend with 10km/h. Time will run slower for me or will run faster for my friend?

Homework Statement A car starts to run from rest with acceleration 0.5 m/s2. How long does it take to travel distance 60m? [sic] (I have a Russian teacher for AP Physics) Homework Equations V= (Xf-Xi)/(Tf-Ti) ΔX= Vi*T+(1/2)aT2 The Attempt at a Solution I tried to find velocity, but that...

Homework Statement A police officer pulls you over for running a red light. You tell the officer, “But the light looked green to me!” How fast would you have to be traveling for this statement to be true? Homework Equations ? The Attempt at a Solution Can anyone point me in the...

First a little intro. The process of renormalization introduces in a QF theory a renormalization scale μ. Physical quantities do not depend on it, as a change of μ comes along with the change of the coupling g(μ) according to the RG law. But why then the physics can change so drastically...

Suppose we have a person, A, who we know his/her physique and biological properties, assume he runs a distance, x, versus the same person walking a distance Bx, where B is some parameter we're doing our optimization on which is >1. Can you find me the minimum value of B for which the same...

Hi, I am trying to run a simulation written mostly in Fortran on Linux. The User's Manual says that "To run a simulation one needs to read several input files." Then, it lists a bunch of files. I was wondering what it means by that and how I "read" the files? Thanks in advance, Naomi

For a high altitude balloon I need to power a radio that draws 1A but briefly peaks at 1.4A for a fraction of a second. <SEE EDIT> I was thinking of using two of these in parallel: http://australia.rs-online.com/web/p/switching-regulators/6727133/ Or one of the above item and one of these in...