Running Definition and 386 Threads

Running is a method of terrestrial locomotion allowing humans and other animals to move rapidly on foot. Running is a type of gait characterized by an aerial phase in which all feet are above the ground (though there are exceptions). This is in contrast to walking, where one foot is always in contact with the ground, the legs are kept mostly straight and the center of gravity vaults over the stance leg or legs in an inverted pendulum fashion. A feature of a running body from the viewpoint of spring-mass mechanics is that changes in kinetic and potential energy within a stride occur simultaneously, with energy storage accomplished by springy tendons and passive muscle elasticity. The term running can refer to any of a variety of speeds ranging from jogging to sprinting.
Running in humans is associated with improved health and life expectancy.It is assumed that the ancestors of humankind developed the ability to run for long distances about 2.6 million years ago, probably in order to hunt animals. Competitive running grew out of religious festivals in various areas. Records of competitive racing date back to the Tailteann Games in Ireland between 632 BCE and 1171 BCE, while the first recorded Olympic Games took place in 776 BCE. Running has been described as the world's most accessible sport.

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  1. A

    ISIS image subtraction program; trouble running

    Hi, I'm a bit new to the forums, this is my first post in fact, but I didn't know where else to go for help on this kind of matter. I'm not sure if anyone here has used ISIS image subtraction program written by Alard, available online at http://www2.iap.fr/users/alard/package.html, but I'm...
  2. W

    What are the benefits and risks of barefoot running?

    I know there are at least 2 other threads on the science behind this, but is anyone here a dedicated barefoot runner? I run about 50 miles a week right now, and today I went for my first barefoot run. I ran a 30 minute route that took me on grass, concrete and 1 mile around a track. As...
  3. humanino

    What Are the Experimental Constraints on the Running of the Weak Coupling?

    Dear all, would anybody know of references regarding experimental constraints on the running of the weak coupling ? This running is rather slow, and I guess we do not have evidence one way or the other, but since the SM and the MSSM have opposite slopes, I'd like to see what kind of...
  4. R

    MATLAB Running MATLAB Programs in Octave

    Hello to all I downloaded Octave. I read that it will run MATLAB programs, but how do you do that? Thanks
  5. I

    E.Engr running out of ideas to enter the world of physics

    Folks, I do Logic design and verification of Multi-core chips for a living (4th year in Semiconductor/Computer HW industry). I don't have much of a background in Physics outside my high school and some Applied Physics courses that I took in BS-EE and MS-EE. I don't covet a PhD in Physics, all I...
  6. A

    Running generator below its capacity

    Dear all, I have no science back ground , I have purchased a 30KVA gas generator, for my farm house, I would like to know if I run it well below its capacity will it be harm full for the generator or it will get hot. It’s a American generator with cooling tower design, which I have converted...
  7. T

    Describing the motion of feet while running

    Assume you're running on a treadmill, looking down at your feet. what would describe this kind of motion? thanks
  8. D

    Gravel Running: Friction & Velocity Questions

    Okay, so I was running the other day and thinking about friction as I hit a patch of gravel. I'm a new physics student so I know enough to think about some things but not enough to know the answers yet. Why is it that if friction works to slow down my velocity, then when there is less friction...
  9. D

    Is Treadmill Running Easier Due to No Air Resistance?

    Does the absence of drag while running on a treadmill make it a significantly less taxing exercise than running outdoors?
  10. S

    Finding Fortran Compiler & Running Clawpack on Windows XP

    I don't know fortran. I have to run few files from clawpack and I have to get results. I have windows xp 2002. Can anyone tell me what software/fortran compiler should I install ? and how do I get results? Thanks in advance
  11. A

    Mathematica Mathematica - running interactive program

    Hi I intend to use a interactive program I have written in mathematica in a presentation. But it has become apparent that I may not have internet access when giving this talk, my license only allows me to open mathematica when I am connected to the web. Is there any programs that will allow...
  12. J

    Running shoes considered harmful?

    http://www.scientificamerican.com/blog/post.cfm?id=running-barefoot-is-better-research-2010-01-27 I haven't read the actual article (don't have access) but I find some of the claims a bit dubious. For one, they say that a heel-strike could lead to more injuries, but only because it is painful...
  13. T

    How do I install KDE when I'm running Windows XP?

    How do I install KDE when I'm running Windows XP? Hi, I am currently running Windows XP on my pc at home. In uni however, I use KDE. I would like to be able to use the same OS when at home too but still want to be able to use Windows when I want. Is KDE a separate version of Linux or do...
  14. Y

    Clocks running slower is an illusion

    I read this somewhere on a physics forum recently What is meant by this statement? I spent a short while thinking about it but can't follow what the person is going on about. Maybe I misunderstood him, but he seems to be claiming that time dilation is actually an illusion.
  15. M

    RUnning Solidworks2009 on Windows 7?

    Is anyone running Soliodworks 2009 on windows 7? I can't reinstall mine after i put windows 7 on, it just stops the installation batr and tells me to try again another time. Ihave never paid maintenance on my lisence, so will have to sort it myself. Anyone experienced problems?
  16. D

    Running Out of Gas - work & power problem

    1. Homework Statement : You are at the top of a hill that is 150 m in height and are traveling at 36 km/h when your car runs out of gas. Due to the relatively shallow grade, the road down the hill is 3000 m long. After rolling down the hill, the car continues to roll on a horizontal section of...
  17. E

    Does the piston ever stop moving in a running engine?

    Does the piston ever "stop" moving in a running engine? well guys...does it?
  18. P

    Gas engine running on Veggie oil -

    Before I get flamed for this, I am not running a gasoline engine directly with normal fuel oil or veg oil- I made a gasifier. My gasifier is lame at the moment, but is just for testing purposes. It consists of a small fuel reservoir, suspended several feet up, then it flows down through about...
  19. M

    Relative Velocity of running towards a mirror

    If you are running towards a mirror at 5m/sec, at what speed is your reflection moving towards you?
  20. I

    Relationship between Point Loads and Running Loads in Cantilevered Beams

    I've been working in class and I'm having trouble clarifying how these two (if at all) are related. Say we have a cantalivered (sp?) beam, prismatic cross section, with a point force acting at the centroidal axis of the cross section in the direction of the longitudinal axis. Will this create...
  21. B

    Running a 1/4 - 1/2 hp electric off 12 volt car/golf cart battery

    Hi, Newby here trying to design a small piece of lawn equipment in my shop. I want to design my own leaf blower using a small electric motor to turn the shaft of a squirrel cage blower. A friend of mine built himself this same system except he used an old lawnmower motor. It works great but...
  22. S

    Is the Internet backbone running out of bandwidth?

    I keep running into reports that within a year or so, the current system will be unable to sustain the rate of growth of bandwidth demand. Projections range from "the internet will become little more than a toy" (a paraphrase), to predictions of brownouts or other limitations. It seems that...
  23. D

    Running DNA and RNA through agarose gel electrophoresis

    Homework Statement How would you predict for samples of ssDNA and ssRNA (1kb long each) would run on agarose gel electrophoresis? Explain. Homework Equations The Attempt at a Solution From what i learned, RNA would run faster then DNA since RNA is more compact. Although what...
  24. P

    Kinematics- Child running down a hill

    Homework Statement A child runs down a 13 hill and then suddenly jumps upward at a 17 angle above horizontal and lands 1.5 down the hill as measured along the hill. What was the child's initial speed? Homework Equations Unknown. Been trying to use trig to solve distances and as a...
  25. T

    AVR STUDIO (compiling C and running)

    okay i can compile the c file fine. but when i run it, its trying to connect through jtag and hardware. I just want to see the output of the compiled program! any1 know how? thankyouu verry much
  26. S

    Speed Limit to Human Sprinting

    Hi all, I am doing a project on the speed limit on human sprinting. I was doing a thought experiment and then got myself confused, so I hope you guys can help me out. I assumed that there is no air resistance, and that the coefficient of friction between the ground and the foot is...
  27. D

    Running away from a beam of light

    Ok tell me if i understand this correctly: Object A is emitting light Object B is moving away from it at half the speed of light (constant speed) Object C is stationary Object B and C are 5 light years away from Object A (B just passes C as the light is initially emitted) the light...
  28. M

    How can I make my PIC16F84A code shorter?

    Hello, can someone help me in programming our PIC16F84A, we need to make a program that will show only a three output like a traffic light,..but I am not quite familiar in programming this. I examined a 7 output LED program but i can't figure out what to changed.. I also want to changed the...
  29. P

    [HELP]What is the difference between renormalized mass and the running mass

    What is the difference between renormalized mass and the running mass? And physical mass,pole mass?
  30. C

    Calculating Average Power for a 51 kg Woman Running Upstairs

    Homework Statement A woman with a mass of 51 kg runs up a flight of stairs in a time of 5.0 seconds. Her net upward displacement is 5.0 meters. What is her average power in kW? Homework Equations The Attempt at a Solution
  31. J

    Ngine running at 900 RPM to power a generator

    I am trying to use an engine running at 900 RPM to power a generator that needs to run at 1800 RPM ( This will go through a pulley) My question is is half the available horsepower to the generator lost since the RPM's are doubled? In other words, do I need to double the horsepower of the...
  32. W

    Medical Long Distance Running: Legs Heavy & Painful - What to Do?

    On one trail I can run 3 miles almost continuously, with small 20 second breaks. However, when I get on the 8 mile trail, at about 4 or 5 miles into the run, my legs start to hurt very abruptly and feel really heavy. My cardio is good enough to keep going, but I'm unable to move my legs faster...
  33. daniel_i_l

    Running Before Jumping - What's the Explanation?

    Why does running before jumping help you jump higher? The only explanation I could think of was that right before the jump you redirect your speed into the ground and compress your bones. This compression gets translated into an upward thrust when they expand again. What do you think? Thanks
  34. K

    Java KMHow to Enable JavaScript in IE for Flash Videos?

    I have a small problem with Internet Explorer. When I try to run many videos I get the message "You need to obtain Flash or JavaScript is not enabled." I have the latest Flash, so it is assumed that JavaScript is not enabled. I never had any reason to disable JavaScript, so I assume that it...
  35. S

    Momentum, man running on flatbed

    Homework Statement Man who weighs 915 N stands on a flatcar that weighs 2640 N as it rolls at 16.0 m/s in positive x direction. No friction. Man runs in negative x direction at 53 m/s relative to the flatcar. What is the resulting increase in speed of flatcar? Homework Equations...
  36. D

    Magnetic field of a wire with current running through it

    on an x,y,z axis i have a wire with infinite length placed on the z axis with a current of 2A running through it downwards, in addition i have a magnetic field of 2*10-7T in the Y+ direction, what is the magnetic firld at A(1,0,0) B(0,1,0) C(-1,0,0) i know that my field at each point must...
  37. T

    MATLAB Problems with running COMSOL with MATLAB

    Hello. I recently obtained a trial version of COMSOL, and was trying to run COMSOL with MATLAB. During the installation process, I clicked option "MATLAB interface" under the "Features" tab. After installing COMSOL, I could not locate the "COMSOL with MATLAB" folder in my Programs menu. Also...
  38. S

    Transformer with wire running through as secondary

    I want to confirm that I'm thinking about this in the right way... Imagine a transformer. The primary has an integer number of turns. Now imagine the secondary has less than 1 turn, i.e., just a piece of wire passing through, forming essentially half a turn. I know voltage is induced in...
  39. wolram

    Longest continuous running lab experiment

    What is the longest continuous running experiment , By continuous i mean some equipment is set up and left to run, not some thing like CERN where there has been periods of down time.
  40. E

    Calculating the Optimal Pace for Uneven Splits

    I hope someone can help me out with a question I've been trying to answer for quite some time with no success A few years ago, Keninisa Bekele, the double Olympic Champ at 5 & 10km, won a World Championship 10km with incredible splits of 14:00 & 13:00 for each 5k for a final clocking of 27:00...
  41. C

    MATLAB MATLAB: Running only a certain section of an m-file

    Hi I have an m-file which accesses another m-file at some point, but I don't want it to run the entire file. Is there a way to skip the first and last 10 lines of the file? I could just create a new file with the code I need, but this is like an addon to a programme, so if I could leave the...
  42. A

    Relativity, trains, and running passenger

    Homework Statement A train of proper length L moves at speed v1 with respect to the ground. A passenger runs from the back of the train to the front at speed v2 with respect to the train. How much time does this take as viewed by some one on the ground? a) Find the relative speed of...
  43. F

    Fortran Error 112 /undef when running fortran code

    Hiya. I am able ot compile my program with no errors but when I run it I get the message: Error 112, Reference to undefined variable, array element or function result. I cannot see where I have gone wrong and more frustratingly this code was working, running producing results on the unix...
  44. M

    Kinematics 1 Dimension, Person Running Solve for Time

    Homework Statement A runner hopes to compleate the 10,000m run in less than 30.0min. After running at a constant speed for exactly 27.0min there are still 1100m to go. The runner must then accelerate at 0.20 m/s^2 for how many seconds in order to achieve the desired time. *note* person does...
  45. W

    Lingusitics Will English Run Out of Unique Letter Combinations?

    English alphabet has 26 letters. A word is just a finite sequence of letters. A sentence is just a finite sequence of words. A paragraph is a finite sequence sentences. It only suffices to say that there exists only a finite number of paragraphs possible (could be billions) but fewer yet exist...
  46. D

    Dear all,I’m running a danger of being banned. I feel, therefore,

    Dear all, I’m running a danger of being banned. I feel, therefore, a need to assure you (and mentors) that I’m not presenting potty opinions here. Among other things, I’m contributor at Wikipedia in areas of neural networks, complexity theory, psychology and neurology. Unfortunately, they...
  47. M

    How Do I Change the Running Parameter in This Sum?

    hi there! I have the following sum: \displaystyle{\sum_{n=1}^\infty}(-1)^n\frac{(2z)^n}{(2n)!} and I want to let it run from n=0 to infty it´s somehow obvious that: \displaystyle{\sum_{n=0}^\infty}(-1)^n\frac{(2z)^n}{(2n)!} -...
  48. V

    Running a f90 code in f77 compiler

    heys..can anyone tell me..how could i run f90 codes in an f77 compiler..wht changes in the code do i need to make to do that?
  49. wolram

    Can the cosmological constant term run in Einstein's equations?

    arXiv:0808.0315 (cross-list from hep-th) [ps, pdf, other] Title: Can the cosmological "constant" run? - It may run Authors: Ilya L. Shapiro, Joan Sola Comments: LaTeX, 36 pages, extended discussion, typos corrected, references added. Sections 2 and 4 include our complete...
  50. L

    Running Couplings and Renormalization Explained

    Hi there! I'm struggling a bit with running couplings. Srednicki introduces dimensional regularization and the \overline{\mathrm{MS}} scheme, then calculates a squared transition amplitude for some reaction in \varphi^3 theory. Eventually, he calculates the beta function for the coupling and...
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