Scale Definition and 743 Threads

The Southern California Linux Expo (SCALE) is an annual Linux, open source and free software conference held in Los Angeles, California, since 2002. Despite having Linux in its name, SCALE covers all open source operating systems and software. It is a volunteer-run event.
The event features an expo floor with both commercial and non-profit exhibitors, as well as 4 days of seminars on the topic of Linux and Open Source software. Sessions and presentations cover a broad spectrum of topics and technical levels.
SCALE grew out of a series of LUGFests put on by the Simi Conejo Linux Users Group in the late 90s. There were four of them, held every 6 months at the Nortel development facility in Simi Valley, California. They ended when Nortel closed that facility in 2001. Subsequently, members from SCLUG, USCLUG and UCLALUG organized to create a more regional event, which they named the Southern California Linux Expo.
Companies, organizations and projects represented at SCALE include Linux-based projects such as Debian, Gentoo Linux, the Fedora Project, KDE and GNOME, other open-source operating systems including NetBSD and FreeBSD, software projects such as Django, open-source database systems such as MySQL and PostgreSQL, other open-source applications such as Drupal, Inkscape, MythTV and The Document Foundation, activist organizations such as Software Freedom Law Center and the Electronic Frontier Foundation, major technology companies such as IBM, HP and Sharp, web companies including Google, Facebook and eHarmony, and internet projects including OpenStreetMap.

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  1. P

    Bobby McFerrin Demonstrates the Power of the Pentatonic Scale

    http://www.boingboing.net/2009/08/01/bobby-mcferrin-hacks.html" Many of the comments below the video and on other websites point out that it is pretty incredible that the audience knows the pentatonic scale and easily follows what McFerrin wants them to do. McFerrin, at the end of the video...
  2. W

    New paper in GRL confirms link between sun and clouds on global scale

    The major conclusion: “A link between the Sun, cosmic rays, aerosols, and liquid-water clouds appears to exist on a global scale…” http://docs.google.com/gview?a=v&q=cache:k3yiHsNVc1cJ:www.wzforum.de/forum2/file.php%3F0,file%3D11877 keep in mind that solar modulation of clouds of even 2-3...
  3. F

    Second law of thermo on a macroscopic scale

    Thermodynamics makes good predictions for macroscopic experiments, but the actual physics is going on in the microscopic particular level. The second law of thermo is often thrown around, usually by people who couldn't explain F=ma back to you. My question is the way the second law...
  4. marcus

    Videos from Planck Scale conference now online

    http://www.ift.uni.wroc.pl/~planckscale/movie/ The first one I intend to watch is Steve Carlip's He is talking about similarities that have emerged among different approaches to QG. In particular evidence for reduction of dimensionality as you zoom in (inspect the spacetime geometry at smaller...
  5. K

    Bathroom scale being compressed but jumping on it

    Homework Statement If you stand on a bathroom scale, the spring inside the scale compresses 0.55mm, and it tells you your weight is 760N. Now if you jump on the scale from a height of 1.3 m, what does the scale read at its peak?
  6. S

    Does Placing a Floating Ball in Water Affect Scale Balance?

    This is not homework, but the question is really bugging me. http://answers.yahoo.com/question/index;_ylt=AvTARlSwKz9P_4km_gmMkfTsy6IX;_ylv=3?qid=20090713211453AAIVYtd" Here is the problem: On a scale, you place a glass of water and a ball on each side of the scale. The scale is balanced...
  7. S

    Convert Continuous Inverse Scale Parameter to Physically Relevant Units

    How to convert a continuous inverse scale parameter into a physically relevant quantity: 1) What is a CISP, and why is called continuous and why inverse? 2) how do I deal with it: Example: On http://www.apec.umn.edu/faculty/gpederso/documents/4501/risk45DistFunc.pdf the error function is...
  8. B

    What are the best chemical options for cleaning oil field water injection lines?

    I was hoping some chemical engineers with experience couuld offer assistance on a question about scale/schmoo. I am working in a oil field to determine the best recipie to clean our main water injection lines which have been restricted over the years. A chemical analysis on the stuff shows that...
  9. R

    How Close Are We to Reaching the Landau Pole in QED?

    Has the energy scale (or cutoff) at which the electric charge goes to infinity (the landau pole) been calculated? I sometimes hear that QED has been probed to tiny distance scales, and I was curious how far away we are until we get to distances corresponding to the Landau pole, after which we...
  10. marcus

    A string theorist reports on the Planck Scale conference

    Jose Figueroa is in the Math Physics group at Edinburgh and his research centers on string and susy: http://www.maths.ed.ac.uk/~jmf/ There was a big conference in Poland just now (ending today 3 July) which was interesting partly because it was mixed. Stringers gave talks alongside nonstring...
  11. putongren

    Exploring Force at Different Scales in Physics

    I'm not sure where to put this post, but it has related to relativity somewhat, so I posted it here. The question I have has more to do with philosophy of science. Anyway, according to Newton's, p = mv, F =dp/dt = ma. But according to Special Relativity, p = γmv , F = dp/dt = γ3maparallel +...
  12. O

    Control of matter on an atomic and molecular scale

    Nanotechnology, is a study of the control of matter on an atomic and molecular scale right? I'm currently studying taking this course in my college and I'm wondering if Nanotechnology plays a part in researching cancer cells. Does Nanotechnology helps in treatment of cancer cells? If...
  13. Z

    Scale of inflation and dark energy

    I keep reading that the energy scale of inflation is possibly 1024eV, while the energy scale of dark energy is around 10-3eV. What exactly are these scales referring to? Is it the energy required to accelerate the universe at the corresponding rates of acceleration? What...
  14. M

    Vibration Damping an Analytical Scale

    Hello MechEs (or anybody else who'd care to reply) I'm about to get a small, but fairly sensitive analytical scale recently (down to 0.01 mg) and now I'm trying to figure out a way to dampen ambient vibration from the room and its surroundings (people walking around, HVAC, etc.) I've got a...
  15. F

    Spring Scale, the force will the scale read?

    Homework Statement A 3.0 kg object rotates on a circular platform 1.5 m from the center. The tangential velocity of the object is 10.0 m/s. If the mass is attached to a spring scale, what force will the scale read? Homework Equations Sorry I have no idea. The Attempt at a Solution...
  16. C

    Large Scale Structure of Spacetime Study Group

    Is anyone interested in going through Hawking and Ellis' book by the title above and posting questions and insights? My interest is in singularities in higher dimensional spacetime, and whether there are other ways to achieve singularities (and their zoology) besides large enough mass. I am...
  17. A

    Why are the primordial fluctuations called scale invariant?

    The slope of the primordial power spectrum (the power spectrum of density fluctuations produced by inflation in the very early Universe before it had been modified by gravitational/hydro dynamics) is often written, P(k) = A * k and then in the same line referred to as scale invariant or the...
  18. E

    Adjust full scale in an orifice flowmeter

    Hi everybody! I hope somebody can help me... We are using a plate orifice to measure water feed to a reboiler; the pipeline size is 1" and the orifice was initially designed for 0-1800 kg/h of water, with a maximum pressure drop of 1000 mm water. As water feed doubles may I simply change...
  19. H

    Determining scale readings given different densities

    Connected by a string to a scale is an object and when suspended in air, the scale reads 200 N. The scale reads 150 N when the object is suspended in water (d = 1000 kg/m^3). What does the scale read (in N) when the object is suspended in oil having a density of 800 kg/m^3? I determined that...
  20. M

    What is Physical Basis of Tuning Note in Western Musical scale

    Apparently extensive music theory of European, Hellenistic and ancient world is beyond my current depth. However, it seems reasonable to expect that western musical notes have a substantive physical basis in addition to relative consistency and obvious physical parameters. Obvious...
  21. marcus

    Nice LQG paper by Modesto about dimension down with scale

    This confirms a beautiful result of Modesto's earlier paper, that LQG seems to coincide with two other very different types of quantum geometry/gravity on the business of dimensionality declining continuously with scale. Fractal-like microstructure of space time. As scale decreases the observed...
  22. D

    Spring force - does it scale linearly?

    I'm struggling to get my mind around this concept: If you have a spring with a known spring constant, and you put a specific mass on it, compress it a certain distance and then release it, can you predict the distance it will travel with the information supplied? Or in other words, can I...
  23. A

    Absolute Zero on celsius scale

    Hi , Please help me to solve following problem. If 20 KJ are added to a carnot cycle at a temperature 100 degree Celsius and 14.6 KJ are rejected at 0 degree Celsius,determine the location of absolute zero on celsius scale? Ans -270.16 C Please tell me how to solve it Thanks in...
  24. T

    How do you work out the largest angular scale to which it is sensitive

    How do you work out the largest angular scale to which it is sensitive and the field-of-view and what frequency range it can be used?
  25. J

    Logarithmic Scale: Calculating Evenly Spaced X Values

    Hello All, I am working on a program that produces plots that use a logarithmic scale on the X-Axis (for showing decade frequency ranges). The Y-axis can have any arbitrary value and I'm not thinking about that at this point, but here is my question. Say, for simplicity that every Y-value...
  26. S

    Does stacking magnets affect their weight on a scale?

    I have a question concerning magnets. Lets say i have 2 magnets each wieghing 1 gram each sitting on a scale. The scale reads 2 grams. What if i was able to stack the magnets by lining up the same poles so they repel each other and the magnet on top was floating over the magnet on the bottom...
  27. R

    Area under graph when log-log scale gives straight line

    Hi, I have a graph with a frequency on the x-axis and power density on the y axis. Both scales are logarithmic, and the graph shows a straight line between the points (110Hz, 0.001V^2/Hz) and (200Hz, 0.004V^2/Hz). I need to work out the area under this portion of the graph as it relates to...
  28. M

    Physics How large scale is plasma physics

    how "large scale" is plasma physics I'm a physics undergrad right now, and I'm trying to pick out classes I want to take to get a better idea of what I'd like to do in grad school. I've wanted to work on fusion/plasma physics for a long time, and right now I'm reading a book on the history of...
  29. N

    What Does the Scale Read in Different Elevator Scenarios?

    Homework Statement A 192 lb person stands on a scale in an elevator. What does the scale read a. When the elevator is at rest. b. when the elevator is accelerating up at 4ft/sec^2 c. when elevator is accelerating down at 3ft/sec^2 Homework Equations The Attempt at a Solution...
  30. S

    How Does General Relativity Encode Universal Energy into Mass?

    Einstein's remainder encodes (= formulates) a universal energy background as mass, in terms of a limit for this energy in discrete terms; the limit represents a bound for the other two components, the e and u that modulate spacetime M; time is then generated by a linear transform of these...
  31. F

    Temperature scale: When will Celsius and Faranheit scales agree with each other?

    Homework Statement Calculate the one temperature at which Fahrenheit and Celsius thermometers agree with each other. Homework Equations TF = TC * (9/5) + 32°C TC = ( TF + 32 ) * (5/9) TK = TC + 273.15 The Attempt at a Solution *Shrug* I can't even understand how to set it up... 4. The...
  32. I

    Time Scale Problem: Solving Diffusion Time of Particles in 2D Space

    I am having a lot of trouble starting the following problem. Any ideas? Thanks a lot for helping! Derive from first principles, the diffusion time for particles traveling at speed v in a two dimensional (x,y) space to reach a distance R from their release point if the scatterers have a...
  33. F

    Scales- Weight on a scale in an elevator (True/False) Quick

    Homework Statement The figures depict situations where a person is standing on a scale in eight identical elevators. Each person weighs 600 N when the elevators are stationary. Each elevator now moves (accelerates) according to the specified arrow that is drawn next to it. In all cases where...
  34. L

    Why planck scale? let me explain before kill me

    Why we are searching quantum gravity effect at the Planck scale? The question seems very stupid (and may be) but let me explain. I define a quantum object when his action is of the order of Planck constant \bar h. namely A~E \delta t~\bar h. So if i take a small amount of energy E i can take...
  35. F

    Tension elevator on a scale problem

    a 71 kg man is standing in an elevator on a scale. the elevator is traveling up with an acceleration of 3 m/s^2. what does the scale read the weight of the man as? thanks guys!
  36. T

    How Is the Planck Scale Reduced in Higher Dimensions?

    Hi everybody, it's my first post on here but as i seem to have hit a brick wall with my work I'm hoping somebody might be able to help me :) Homework Statement I'm looking at how the Planck scale is reduced in higher dimensions (ADD theories) and I've managed to reproduce an expression...
  37. D

    What force does the scale display in Newtons?

    Jasmine has a mass of 7 kg. He stands on a scale in an elevator that is accelerating downward at 4.9 m/sec ^2 . What force does the scale display in Newtons?Thank you for your help! :] F = ma i get 34.3 what is the unit i attach it to?
  38. D

    Planck Scale and Unification of Forces- new research studies

    How do Planck's photon theories relate to the belief that all forces may be unified at high speeds? I understand that light waves can act as particles, and particles can act as light waves. Waves/particles emit energy. And Planck's scale is believed to be around the length of convergence of...
  39. S

    What is the boiling point of water on the Z scale?

    A demented scientist creates a new temperature scale, the "Z scale." He decides to call the boiling point of nitrogen 0 Z and the melting point of steel 1000 Z. What is the boiling point of water on the Z scale? Convert 200 Z to the Celsius scale. Convert 200Z to the Kelvin scale...
  40. G

    Calculating Volume & Buoyant Force: A Spring Scale Experiment

    I did an experiment where i measured the weight (in Newtons) of three objects on a spring scale. Then, i measured the weight (in Newtons) of the three objects on a spring scale while the objects were submerged underwater. How would i calculate the volume and buoyant force?
  41. B

    QM: Infinitesimal Generator for Scale Transformation

    Homework Statement The scale transformation is a continuous transformation which acts on a function f(x) according to D_{s}f(x) = f(sx) where s is a real number. There is a continuous family of such transformations, including the identity transformation corresponding to s = 1...
  42. B

    Calculating the Force on a Sloped Wedge & Scale

    What is the force that the scale reads (the "weight") as the mass slides down the slo There is an object on top of a wedge sitting on a scale. When the object is released, the object slides down the slope of the wedge. What is the force that the scale reads (the "weight") as the mass slides...
  43. I

    How Do You Create a Scale Drawing of a Hot Air Balloon with Mints as Passengers?

    1.Hi, I need to create a scale drawing of a hot air balloon at which we are creating, it is odd because I don't know how big it's going to be and have no idea how to make a scale drawing, the balloon does not need a basket but will have mints attached to it (as passengers) to see if it can hold...
  44. B

    Lifting Weight VS Pushing a Scale

    Is the concept the same? If I am able to bench press a maximum of 200lbs, and I were to push with full force a scale bolted in a stationary position at the weakest point of my bench press motion, would the scale read 200lbs?
  45. M

    Scale drawing with Cartesian solution and Polar representation

    PLEASE HELP ! THANK YOU (: 1. My teacher gave us a drawing with 4 vectors on it. Vector A = 130 N and is at a 20 degree angle. Vector B = 100 N and is at a 70 degree angle. Vector C = 70 N and is on the x-axis. Vector D = 50 N and is at a 10 degree angle. Given this picture we are told to...
  46. B

    The line between quantum and large scale objects

    Where is the line between these two subjects. I understand that I may be asking an unanswerable and highly studied question. I understand that in the quantum world everything is based on probability. But when looking at things at our perspective we never see this probability. Everything is...
  47. F

    What is meant by scale factor for gyroscopes.

    hello.i'm looking at data for gyroscopes, because i need to find one that's very accurate to within a degree. there are two items that might describe it the way i see it: bias or scale factor... I'm not sure which one would tell me what I need to know. I've tried to Google for definitions, but...
  48. T

    Electric or mechanical scale to weigh yourself?

    Which one would you pick for your scale and why? Have a vote (mechanical=manual in poll) . The question boils down to which is more accurate?
  49. I

    12 coins and a balance beam scale

    You are given 12 coins that are identical except that they are numbered and you are told that one coin is odd-weighted, being either slightly lighter or slightly heavier than anyone of the remaining eleven. You are given a worktable and a balance beam scale. You may use the scale three times...
  50. I

    What is the current value of the scale factor?

    Do cosmologists know what is the current value of the scale factor? I know we have a current value for the Hubble constant H, and I know H=a'/a. But what about the value of a? Thanks!
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