Global Definition and 430 Threads

The Global Television Network (more commonly called Global, or occasionally Global TV) is a Canadian English-language terrestrial television network. It is currently Canada's second most-watched private terrestrial television network after CTV, and has fifteen owned-and-operated stations throughout the country. Global is owned by Corus Entertainment — the media holdings of JR Shaw and other members of his family.
Global has its origins in a regional television station of the same name, serving Southern Ontario, which launched in 1974. The Ontario station was soon purchased by the now-defunct CanWest Global Communications, and that company gradually expanded its national reach in the subsequent decades through both acquisitions and new station launches, building up a quasi-network of independent stations, known as the CanWest Global System, until the stations were unified under the Ontario station's branding in 1997.

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  1. P

    Information Equivalent of the Svalbard Global Seed Vault

    I was wondering if there is currently a project by some government or NGO, in the same spirit as the Svalbard Global Seed Vault, to digitize all information (history, math/science, literature, etc.) and store it either somewhere safe on the planet or better yet on some other celestial body in...
  2. S

    Determine n for Ensuring Global Error is Less Than 10^-2 in Euler's Method

    Homework Statement Use Euler's method with h = 1/2 to estimate y(1) for the IVP: y(0)=1 y'(t)=t^2-y(t) Assuming that |y(t)| \le 1 for 0 \le t \le 1 determine the value of n needed to ensure that |E_n| \le 10^{-2} Homework Equations |E_n| \le \frac{T}{L}(e^{L(t_n-t_0)-1}) The Attempt...
  3. S

    Global max/min (multivariable)

    Homework Statement Find the global maximum and global minimum of f(x, y)=x^3+y^2 in the half disk x^2+y^2\leq{1}, y\geq{0} This is a rather new topic for me, so I am looking for clarification for problems such as these. The Attempt at a Solution First, I determined the critical points of the...
  4. zonde

    Global observations from Rindler frame

    Basically I want to understand what Rindler observer will see if he looks out the window in direction that is perpendicular to direction of acceleration. As I understand there are at least three effects (as analyzed from perspective of Minkowski observer): 1) accelerated motion relative to...
  5. F

    Should Global Variables be Used for Constant Data Tables?

    Hi, I just want to know, if you're writing a reasonably short program (~500 lines), and you're basically using a global variable as a const (user inputs it once, and you won't ever change it), then is it ok?
  6. tom.stoer

    Covariant global constants of motion in GR?

    We know that in GR it is not possible for arbitrary spacetimes to define a conserved energy by using a 3-integral. There are some obstacles like the covariant conservation law DT = 0 (D = covariant derivative; T = energy-momentum-tensor) does not allow for the usual dV integration (like dj...
  7. T

    Goldstone bosons in Models with global symmetry, broken by Orbifolding

    Hi, I am interested in grand unification with extra dimensions. Especially the case when extra dimensions are broken by orbifolding. Now I am trying to understand how the Goldstonebosons appear in the spectrum of a theory with global (for example SU(N)) symmetry. From the...
  8. R

    Fun Challenge - weighted average of global rankings

    ***Fun Challenge -- weighted average of global rankings*** Goal The goal is to create a weighted average of global rankings. Does not have to be perfectly accurate (if that was even possible). Specific Example To make this problem less abstract and easier, we are going to use a specific...
  9. P

    Global GR Theorems without Energy Conditions?

    It has come up a few times in recent threads here that the energy conditions on the stress-energy tensor (weak, null, dominant, etc) traditionally used to prove global results (e.g. the singularity theorem, the positive energy theorem, geodesic motion theorems*) are problematic: they allow more...
  10. S

    The Greenhouse Effect vs. Blackbodies vs. Global Warming?

    Can anyone explain what the right approach to this stuff is? It's an area I am largely ignorant about. According to the Stefan-Boltzmann Law, the Earth should be -18C. Obviously, this isn't true because the Earth isn't a blackbody. But my questions: 1. Why isn't the Earth technically a...
  11. Aaronvan

    Cormac McCarthy's The Road - What caused the global castrophe?

    Cormac McCarthy's "The Road" - What caused the global castrophe? I’m trying to figure out the cause of the global catastrophe that occurred as part of the book’s back-story; not from clues in the book but from what I know about Cormac McCarthy. The book’s only sentence about the event reads “A...
  12. P

    Global error data set & mathematica cubic spline

    Hey, I have a data set (electronic device output) which we need to find the best fit via approximation and interpolation. I've done a cubic least squares, then found the local error for all the given points (actual - approximate). We need to also find the global errors for the methods we choose...
  13. R

    Global fitting with shared parameters

    Homework Statement Hi I'm looking for an algorithm that can perform a fitting procedure on many curves simultaneously. Let's say, for example, that I have 3 exponential decay curves with 3 different decay times but they all share the same initial amplitude. So I have to find a fit for 4...
  14. S

    Global Socio-Cultural Responsibility

    Can someone give me a clear definition of what Global Socio-Cultural Responsibility is i am writing a paper on it and cannot find clear definitions. Thanx
  15. A

    Local to global transformation; end rotational displacments

    Hi I am analysing some piping which starts off as being aligned with the global axis system (X Y Z). So axially its X, laterally is Y and Z is vertically upwards. Due to bends etc. the end of the pipe is in a different orientation though still in the same plane - now the local axis system is x...
  16. E

    Global Data Storage: Can You Store More Info in Human DNA than on Computers?

    Hi everyone. I've just read this article on the bbc.co.uk http://www.bbc.co.uk/news/technology-12419672 It says.. ""The Human DNA in one single body can store around 300 times more information than we store in all our technological devices" according to Dr Hilbert." Can this...
  17. H

    Global Warming: What Happens to Day Length if South Pole Melts?

    Homework Statement I swear this is the weirdest question I've encountered: If the South polar ice cap melts completely due to global warming, then what do you expect to happen to the length of the day? 2.Choices a. It will get slightly longer b. It will get slightly shorter c. It will...
  18. C

    True or False: Joint CDF Has Only One Global Max?

    True or false: "Every joint CDF has only one global maximum at F(x1*, ..., xn*) = 1? I know that the multivariate CDF is monotonically non-decreasing in each of its variables. But does that imply that it has only one global maximum? Is it possible to have two or more separate peaks where the...
  19. A

    Why global conservation of certain physical quantities is not enough?

    What is the implication of the fact that quantities like electric charge, color etc are conserved not just globally but in local region of space too? I understand the later is more restrictive but what advantage does it offer?
  20. N

    NASA NASA Photos: Global Eruption Rocks the Sun

    "Dec. 13, 2010: On August 1, 2010, an entire hemisphere of the sun erupted. Filaments of magnetism snapped and exploded, shock waves raced across the stellar surface, billion-ton clouds of hot gas billowed into space. Astronomers knew they had witnessed something big. It was so big, it may...
  21. L

    How long until the next global war?

    It's been more than 60 years since the last world war. Society has become more globalized than ever. We (the Western world) are living in more luxury than kings were, a century ago*. I honestly can't see us - humanity - live for another half a century without major conflicts. There's just...
  22. M

    Global diffeomorphism with tangent bundle

    I am terribly confused on the issue of trivial tangent bundles. I understand intuitively why some tangent bundles are trivial and others are not, but I'm having trouble figuring out how to show it. Even the most trivial example, show that T\mathbb{R}^n is diffeomorphic to \mathbb{R}^{2n} I...
  23. P

    Physics Project involving ice, gases, and global warming

    Alright, ASSIGNMENT it is required of me to to the physics part in a group project where the topic is "causes of global warming". my group has chosen methane clathrates or methane hydrates if you like (in the ocean, not on land). The way these work is that it is methane gas that is trapped in...
  24. F

    Estimation of diffuse and direct radiation starting from the global radiation

    I don’t know if this one is the appropriate forum for the following question. If for this question it is better another section of the forum, point out to me, please. I know the global radiation on a south oriented surface, in a German locality. Do you know methods to estimate the direct...
  25. DaveC426913

    Forget ocean levels rising due to global warming what if

    ...Earth stopped rotating? Most of North America would be swamped under poleward rushing oceans. A whimsical but cool look at an Earth stopped in its tracks... From http://bigthink.com/ideas/21768".
  26. P

    Max Temperature Peak: Global vs Local Energy Source

    Ok, so say I have a system at a global temperature, I add an energy source (laser in this case) and it heats the system in a localized area. This leads to a maximum temperature peak in the system. Then you can get out a change in temperature from this maximum to the global. OK, now my...
  27. E

    Materials to read on global warming

    I am a solid state physicist. I feel bad that I know nothing about global warming (in terms of the details: what experiments have been done, what models exist, key papers, what, if any, real controversy there is). What resources would be recommended? What papers, books, websites? It is...
  28. Phrak

    Exploring the Truth Behind Global Warming and Human Impact on Climate Change

    After the fiasco in exposure of the global warming liars, I don't see a single, recent post on global warming. Can we now take up this topic as one of cold, objective science rather than one where we are confronted with the Chicken Littles in love with instilling fear in others? What does...
  29. C

    Special relativity: local frames versus global frame in a loop scenario

    Take the following setup: A series of pulses of radio signal is relayed around the world, along the equator. There is no "gap", it is a continuous loop along numerous relay stations build along the equator. The total number of pulses is fixed at 648,000 - I'll explain in a minute why that...
  30. M

    Global Section of Fiber Bundles with Contractible Fiber

    Is it true in complete generality that every fiber bundle with contractible fiber have a global section? Or do some sort of restrictions on the bundle need to be made? I ran across a mention of this fact in Guillemin and Sternberg's "Supersymmetry..." and I'm not sure how to prove it.
  31. F

    What is the significance of global fit in EW precision tests?

    I always hear that the "global fit" EW precision test. It seems that I understand it a little. But I am still very clear. Who can shed light on it?
  32. S

    What is Meant by Waveform in Nonlinear Dynamics?

    What is meant by "waveform". Working in strogatz nonlinear dynamics, global bifurcati Homework Statement Consider the system r' = r(1-r^2), O' = m - sin(O) for m slightly greater than 2. Let x = rcos(O) and y = rsin(O). Sketch the waveforms of x(t) and y(t). (These are typical of what one...
  33. S

    Mathematica Mathematica - Specific shading vs global - Mesh or ListPlot?

    Hi, I am trying to shade two portions of the polygon defined by the dotted line in this code. The Mesh and MeshFunction cmds seem to allot global shading only. What is the best tool to shade, say half of the aforementioned polygon? Function[{LtMarg, BotMarg, RtMarg, HVal, DVal, rVal}...
  34. K

    Local vs. global charge conservation

    Is it correct that theories such as the free complex scalar field or the free Dircac field with their global U(1) symmetry give rise to only globally conserved charges (a globally conserved Noether charge)? If so, how can that be shown? Also, is it somewhat correct to say that the main reason...
  35. Beer w/Straw

    Examining the Debate: Global Warming and Politics

    I don't know if this is (the most beneficial) place to post this but... This notion seems to be under attack with politics and dronwing any science. Is this claim wrong or right?
  36. Greg Bernhardt

    Global Warming & Climate Change Policy

    Attention: These rules are deprecated as of 6/9/2014 PF is announcing its regrettable decision to ban all topics of global warming and climate change indefinitely. At this time we are unable to effectively moderate on the issue of climate change and global warming. We hope this ban will be...
  37. A

    Lord Monckton: Global Warming big scientific fad

    Here's a very interesting You-tube interview Russia RT interview. The BBC has responded by announcing it's review of it's reporting of climate science BBC to launch review into allegations of bias in its science coverage. Here's the Mail's webpage BBC probes bias in its coverage of science and...
  38. S

    Medical Cause of event of Global amnesia ?

    Cause of event of Global amnesia ?? The senario the person is normally non- alcoholic; over a two week period a bottle of red wine is consumed in small amounts a'memory laps' seems to occur with the individual' forgetting' to apply the car hand brake on three occassions over another...
  39. C

    Is the Theory of Global Warming Falsifiable?

    I am 'the other kind' of skeptic about global warming. I look at climate charts, past predictions, and the many PF threads and come away unconvinced that global warming is occurring at all -- to speak nothing of cause. But global warming opponents are even less convincing to me, using outdated...
  40. A

    Top 50 Things To Do To Stop Global Warming

    Global Warming is a dramatically urgent and serious problem. We don't need to wait for governments to find a solution for this problem: each individual can bring an important help adopting a more responsible lifestyle: starting from little, everyday things. It's the only reasonable way to save...
  41. N

    Is Global Warming Human-Caused or a Natural Earth Cycle?

    Hello. We are 3 boys who writes about global warming for a school project, and we would like to hear your opinion about; Whethever you think it is caused by the humans or whether it is just a phase in the Earth's cycle. And who/what do you think, is the cause of global warming. About what...
  42. T

    Is anthropogenic global warming a scientific theory?

    Earlier today, I posted on this issue and a lively discussion ensued. I'm happy to have received several responses. As I recall, each of these took issue with one or more of my posting's claims. An administrator inadvertently deleted the thread of our conversation before this conversation...
  43. Andre

    News Is Global Warming a Case of Scientific Consensus or Groupthink?

    Some time ago I wondered about the legitimacy of the Irak war in regards to the non-existence of weapons of mass destruction. I contended that the WMD element was not a deceptive lie but merely the result of the groupthinking mechanism. On other occasions I tried to demonstrate that some...
  44. D

    What would Richard Feynman say about Global warming?

    I wonder... Would it be something like that?
  45. G

    Is Global Warming Debunked by Thermodynamics?

    Ahhh yess the infamous global warming controversy... okay so i figured this would be a nice place to post this because it pertains to Thermodynamics A good friend of mine (who is my current roommate) loves to find things that go against what i believe and claim to prove it. A few weeks ago he...
  46. S

    Chris Matthews show, Global warming, and CRU Hack

    Woops, I apologize for the misleading subject heading as the events at CRU were not brought up at all, or even alluded to in the slightest. Not by Chris or any of the 4 members of his panel. What they did tell you was that if you were a democrat, you should get in line with the rest of the...
  47. T

    Approximately how many casualties would there be from a global H5N1 pandemic?

    About how many global casualties would there be if the H5N1 "bird" flu virus, which kills more than 80% of it's victims, were to become a level 6 pandemic? If the entire world's population were infected, I would imagine that about 5,000,000,000 people would die from the disease. Probably even...
  48. W

    Global symmetry of an N-component Klein-Gordon theory?

    The Lagrangian is given by, \sum_{a=1}^N \left[(\partial^{\mu}\phi_{a}^{\ast})(\partial_{\mu}\phi_{a})-m^{2}\phi_{a}^{\ast}\phi_{a}\right]. Is the symmetry SO(2N), SU(N) or U(N)? It seemed quite obvious to me and some of my friends that such theory has an SO(2N) symmetry. If we view...
  49. D

    Will the Earth really flood when global warming happens?

    Will the Earth really flood when global warming happens? Seems far from definitive and far less clear than the science behind global warming. I remember my Oceanography professor challenging the notion that global warming would raise sea-level, shut off gulf stream, thermohaline circulation. My...
  50. R

    Global extrema without numbers

    Homework Statement When you cough, your windpipe contracts. The speed, v, with which air comes out depends on the radius, r, of your windpipe. If R is the normal (rest) radius of your windpipe, then for r <_ R, the speed if given by v = a(R-r)r2 where a is a positive constant. What value of r...
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