Edge Definition and 265 Threads

Enhanced Data rates for GSM Evolution (EDGE) (also known as Enhanced GPRS (EGPRS), IMT Single Carrier (IMT-SC), or Enhanced Data rates for Global Evolution) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM. EDGE is considered a pre-3G radio technology and is part of ITU's 3G definition. EDGE was deployed on GSM networks beginning in 2003 – initially by Cingular (now AT&T) in the United States.EDGE is standardized also by 3GPP as part of the GSM family. A variant, so called Compact-EDGE, was developed for use in a portion of Digital AMPS network spectrum.Through the introduction of sophisticated methods of coding and transmitting data, EDGE delivers higher bit-rates per radio channel, resulting in a threefold increase in capacity and performance compared with an ordinary GSM/GPRS connection.
EDGE can be used for any packet switched application, such as an Internet connection.
Evolved EDGE continues in Release 7 of the 3GPP standard providing reduced latency and more than doubled performance e.g. to complement High-Speed Packet Access (HSPA). Peak bit-rates of up to 1 Mbit/s and typical bit-rates of 400 kbit/s can be expected.

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  1. E

    Table tempered glass edge break pattern

    Supposed someone (like a naughty child) sits on the edge of the cantilevered hardened tempered glass table (see photo below) and it breaks. Would all the table glass break into pieces at same time or would the edge break separately? and would there still be sharp edges? I know tempered glass...
  2. Bling Fizikst

    Electric field at the edge of half planes

    I assumed the plate areas to be ##S## , then electric field at ##P## should be $$E_P=E_{+\sigma}-E_{-\sigma}=\frac{k\sigma S}{h^2}-\frac{k\sigma S}{(h+d)^2}\approx \frac{2k\sigma S d}{h^3}$$ but i think it's wrong here as ##P## lies at the edge , so it won't recieve electric fields in a way...
  3. C

    Limit on the edge of the domain

    What is the limit of the function as x goes to -5 (e.g. in the graph below) if the domain of the function is only defined on the closed interval [-5,5]? I realize that the right hand limit DOES exist and is equal to 3, but the left hand limit does not exist? So does that mean that the overall...
  4. M

    A Rectangular higher order edge element (finite element method)

    I have solved many finite element problems using nodal based (rectangular element) for higher order. now i am trying to solve electromagnetic problem using vector element (Nedelec or Whitney). I know only triangular edge based element with first order only and not higher order. i am searching...
  5. Astronuc

    B Ivuna meteorite from edge of solar system to Tanzania?

    Scientists find the source of one of the rarest meteorites to fall on Earth https://www.msn.com/en-us/news/technology/scientists-find-the-source-of-one-of-the-rarest-meteorites-to-fall-on-earth/ar-AA13ejQe Terrestrial modification of the Ivuna meteorite and a reassessment of the chemical...
  6. D

    B Would light travel in a circle at the edge of the observable Universe?

    Is there sufficient mass within the observable universe’s volume to form a black hole event horizon around the observable universe and, if yes would light fired tangentially at the edge of our observable universe ever loop back around in a circle or spiral inwards?
  7. G

    I Chaos theory has no fine edge -- does it fluctuate?

    Does nature err slightly beyond order into chaos in the context of chaos theory? And I'd like to proffer the idea that the point at which order tips into chaos actually fluctuates. Nothing in nature is absolutely perfect therefore do natural errors at the point in which order tips into chaos...
  8. Mr_Allod

    Edge States in Integer Quantum Hall Effect (IQHE)

    Hello there, I am having trouble understanding what parts b-d of the question are asking. By solving the Schrodinger equation I got the following for the Landau Level energies: $$E_{n,k} = \hbar \omega_H(n+\frac 12)+\frac {\hbar^2k^2}{2m}\frac{\omega^2}{\omega_H^2}$$ Where ##\omega_H =...
  9. B

    Image processing with Sobel Edge detection

    I am coding Sobel Edges detection in C#. I have a method that converts my image to grayscale. it adds the R G and B values and divides by 3. and replaces the R G and B value out with that same number. That seems to be working fine. Then I added a gaussian blur to it by using this...
  10. M

    Help identifying a length for this paper edge

    Hi PF! Two years ago my lab launched experiments aboard the ISS. The experiment was simple: place two water droplets on a substrate, set camera above the drops, and watch them coalesce. However, the exact size of the drops is unknown (approximately 1 cm radii, though this number is debated)...
  11. T

    Is the Ninja Juicer Edge Worth the Upgrade?

    One of my players asked about playing a Ninja Juicer (WB7 Japan, p. 84), and I figured it was a reasonable Upgrade Edge. So looking at what changes with the NJ, they get slightly reduced P.S. (so either lower Strength or no Brawny), meditation which let's them seem normal (this is just flavor)...
  12. Astronuc

    RIP Graeme Edge (80), drummer, Moody Blues

    Moody Blues drummer, co-founder Graeme Edge dies at 80 https://apnews.com/article/entertainment-europe-england-justin-hayward-music-4539837e7e0a8f59c2050c87c260ee42 Nights in White Saturn I'm Just a Singer in a Rock and Roll Band
  13. A

    B Gamma spectroscopy, Compton edge

    Hello, I have a few uncertainties about this, Forgive the long questions, I appreciate your time. 1) Why is the maximum energy photon loses during Compton scattering about 0.238MeV (if maximum angle 180 achieved aka backscatter) irrespective of the incoming photon total energy? It seems...
  14. C

    Showing existence of an Edge s.t. Graphs T1' , T2' are Trees

    Attempt - I am stuck at this problem for hours, couldn't make any progress. Still, here's what I've done : Let ## e_1 \in E_1 \setminus E_2 ## be arbitrary. Suppose for the sake of contradiction that ## \forall ## ## e_2 \in E_2 \setminus E_1 ##, ## T_1' = \langle V,(E_1\setminus \{ e_1 \})...
  15. Mr_Allod

    Approximating the Edge of a Lens as a Prism

    Hello there, for part a. of this problem I thought I should try to find the radius of curvature R of the lens using the Lensmaker's Formula. Then it would be quite easy to find the minimum thickness T by just finding the thickness of the circle segment using Pythagoras' Theorem. But part of...
  16. C

    Maximum acceleration given a breakable edge

    Using Newton's second law, $$ cos\left( \frac{\pi}{6} \right) m(a+g) = 150 \Leftrightarrow a = \frac{\frac{2\times 150 }{\sqrt{3}}-mg}{m} =4.633. $$ Unfortunately, the possible answers are A. 1.025, B. 0.625, C. 3.75, D. 2.75, E. 1.75, F. 0. What am I getting wrong? Isn't the force exerted on...
  17. M

    How to save a page in the Edge browser?

    I very seldom use Edge as a Browser. However when I used it recently I wanted to save the screen image. I could not find anything on the menu to do it. How would I do it?
  18. S

    Why is the edge of the light from my flashlight beam so blurry?

    On the photo you can see: Red 1: the edge is very sharp (as expected) Red 2: the edge is very blurry (but why?) Same for green. You can also see (Red 2) that the blurry edge is yellow. What is this effect called?
  19. J

    A Edge state question for a 2-D material and the quantum Hall effect

    I have read some materials about quantum hall effect and know that at the edge of a 2D material , one can linearize the potential V and the linear dispersion relation represents right/left moving fermion. So , Can I say that for a given hamiltonian , if I can linearizae it at edge, then this...
  20. G

    MHB Calculate the length of the fourth side edge.

    The three lateral edges of a pyramid based on a square are 6016, 2370 and 4350 long. Calculate the length of the fourth lateral edge. We assume that edges 6016 and 2370 extend from the opposite tops of the base.
  21. S

    Radius of disk suspended on its edge

    I can calculate the angular speed but I don't know how to calculate the radius. Is there certain formula to calculate it? Thanks
  22. J

    Engineering Output waveform after input rising edge and before output falling edge

    A is given waveform, we have to use circuits to get B and C waveform. For B we can use an And Gate with 2 inputs, X and Y. X is buffered (to get some delay) and is fed to Y input of And Gate. So we'll get waveform B. But I don't know how to get C waveform. The question is that even if I extend...
  23. paradisePhysicist

    I Thread attempt 2: Edge physics trying to understand

    My first thread was closed for being too confusing to read. I will try to make it more clear. Also some more parameters: Rod and solid has 0 restitution, solid is anchored and does not move, it is instantly deleted upon collision.
  24. Sophrosyne

    B The Hubble deep field photos and the edge of the universe

    The Hubble telescope was able to capture images of the edges of our visible universe in its deep space photos. These were among its most breathtaking pictures. They show galaxies from about 14 billion light years away, as well as in the past, from the very beginning of time and space in our...
  25. S

    I Edge connectivity of a graph given the number of edge disjoint paths

    What can we infer about the connectivity and edge connectivity of a graph given the number of edge disjoint paths? So the number of edge disjoint u,v paths in a graph is x. Doing this problem, I thought back to Menger's theorem, and thought that the graph is x-edge-connceted and so the number...
  26. Aryamaan Thakur

    Electric potential at the edge of a thin charged circular plate

    My question might sound stupid to you but please clear my confusions. I'm taking an circular arc like element on the plate. That arc has a radius of 'r' (AB) and the radius is inclined at an angle 'θ' with OA (∠OAB). The area between arc of radius r and r+dr is dA. dA = 2θr.dr The charge on...
  27. M

    The Lagrangian for a piece of toast falling over the edge of a table

    First of all, disclaimer: This isn't an official assignment or anything, so I'm not even sure if there is a resonably simple solution. Consider the following sketch. (Forgive me if it isn't completely clear, I didn't want to fiddle around for too long with tikz...) Let us assume that we can...
  28. S

    B Is Figure a Polygon? Examining Edges of the Image

    Can someone please tell is this (https://ibb.co/stGFSKs) figure a polygon. If yes then is the middle line would count as an edge?
  29. Katherinepierce

    Don’t know how to study for maths exam which is on the edge

    Hey, I’m new here .Good to join you all .. I need your help as I don’t know how to study maths . I am always distracted. I even sleep well. I don’t use my social media account or have phone with me still I can’t concentrate. When I start doing maths I feel like I have forgotten everything I...
  30. K

    Why is my CPU usage so high when opening multiple web pages on Microsoft Edge?

    I opened about 30 Microsoft Edge web pages.. the CPU usage can reach 75%. Why is there so much CPU usage for opened web pages? My processor is Intel Corei5 3.2 Ghz and 16 Gigs of DDR3 RAM.
  31. F

    Edge Data Center Size Cost Estimation in Bakersfield, CA

    I want to do a cost estimation for an edge data center in Bakersfield, California. I don't know how big should the center be and i do not know how i can view the data traffic. Can anyone help?
  32. J

    I What is the best theory why our vacuum may be in the edge of metastability?

    What is the best theory why our vacuum may be in the edge of metastability? Is it possible there are many false vacuum separated by energy barriers and the reason why our vacuum may be metastable is so that it is easier to cross the different false vacua (not necessarily to the true vacuum)?
  33. karush

    MHB How Do You Derive the Equation for a Vertically Thrown Stone from a Cliff?

    A stone is thrown vertically upward with a speed of 15.5 m/s from the edge of a cliff 75.0 m high ok, I was going to graph this with Desmos first but don't know how to derive the equation for the parabola. there are 11 questions following this...$$\tiny{Embry-Riddle \, Aeronautical \...
  34. S

    Height of edge of billiard table

    Homework Statement Consider a billiard table with balls of radius r. How high should be the edge of the table to not allow undesirable pressures (and thus slips of the ball)? I.e. if there was no gravity, the billiard ball would still bounce off parallelly to the table plane. However I do not...
  35. J

    Firing mortar and cliff edge, Feynman Lectures 4.17

    Homework Statement "A mortar emplacement is set 27,000 ft horizontally from edge of a cliff that drops 350 ft down from level of mortar...It is desired to shell objects concealed on the ground behind the cliff. What is the smallest horizontal distance d from the cliff face that shells can reach...
  36. Z

    How to Calculate the Edge Length of a Cube Given Its Volume and Surface Area?

    Homework Statement The volume of a cube is 'v' cubic yards, and its surface area is 'a' square feet. If 'v' = 'a' what is the length in inches of each edge?Homework Equations volume of a cube = e^3 surface area of cube = 6e^2The Attempt at a Solution volume of a cube = 'v' cubic yards...
  37. H

    A How to get Peierls substitution in edge state?

    In paper PRL 101, 246807 (2008), authors use "Peierls substitution", that is ky -> -i∂ y. As we know, ky is eigenvalue of translation operator in period potential, while -i∂ y is momentum operator, it seems they are huge different. So I wonder how to get ""Peierls substitution" in strict math way?
  38. A

    A Are all edge states topological?

    Hey am new to this forum but I have a question regarding topologically protected states.. Let's suppose we have a 1D gapped system divided two to distinct regions that have different periodicity or different properties and that at the centre, where the two regions 'meet' states appear in the...
  39. C

    Voltage between centre and edge of conducting disk

    Homework Statement A metal disc of radius R rotates with a constant velocity ω about its axis. FInd the potential difference between the centre and the rim of the disc if: a)the external magnetic field is absent b)the external magnetic field of induction B is directed perpendicular to the disc...
  40. D

    Rod Falling under gravity hits straight edge

    Homework Statement [/B] http://imgur.com/a/Ssolz Homework Equations [/B] Elastic Collision so $$ mgh = \frac{1}{2}mv_i^2 = \frac{1}{2}mv_f^2 + \frac{1}{2}I\omega^2 $$ $$ F=ma $$ The Attempt at a Solution [/B] So the problem is similar to this one which allows me to work out the normal force...
  41. sophiecentaur

    I Life on the Edge: is it still alive?

    I recently read ' Life on the Edge" by Jim Al-Khalili and Johnjoe McFadden. It was very readable and it got me quite convinced about the whole idea. Al-Khalili is a very presentable broadcaster / writer and offers an attractive case. But it was written some while ago and Google hasn't much to...
  42. Vital

    How fast is the edge of the yo-yo spinning in mph

    Homework Statement Hello! I am trying to solve the exercise, but I don't see my mistakes - I can't come up with a correct answer. The exercise from the begging of trigonometry, so it has to be solved using concepts of a speed and angular velocity. A yo-yo which is 2.25 inches in diameter...
  43. John Morrell

    B Edge of the Universe: Is It Real?

    So I'm sure you've all heard people talk about increasing expansion of the universe, the compact nature of the universe at the moment of the big bang, and other comments like this. The idea of an expanding universe immediately suggests to me an "edge" of the universe, which is something often...
  44. M

    MATLAB Working with Edge function in MATLAB

    Hi PF! Attached is an image I generated using the edge function in MATLAB (except the arrows, obviously). I would like to extract just the coordinates of the pixels from the bottom curve, which I've pointed at with arrows, and only in the domain between the red lines. Does anyone know how to...
  45. L

    B What can we see from the farthest reaches of the universe?

    Hypothetically, what does the edge of the universe look like? Past our known visible universe to the edge of the expanding universe what is it like?
  46. B

    B What is seen from the farthest star?

    Imagine someone in a planet at the farthest star of the farthest galaxy from ours. From that planet would the sky be a half black and the other half full of galaxies? Could a star be at the "edge" of the universe or general relativity contradicts that?
  47. R

    Ball is thrown at the edge of the roof of a building

    Homework Statement A ball is thrown at the edge of the roof of a building in a direction at an "alpha" angle above the horizontal. It landed 5 seconds later at 50 meters from the building. The maximum height reached by the ball during its trajectory is 20 meters above the roof. Find The...
  48. S

    A Spin-Polarized Edge State Magnetization Biasing

    Some materials, notably graphene and some other 2D nanomaterials, possesses spin-polarized edge states, e.g., where one edge may allow the conduction of spins oriented "up" while the opposite edge only allows conduction of "down" spins. My question is not why these spin-polarized states exist...
  49. A

    Capacitor Edge Effect: Math Analysis

    Hello, I have been searching for a mathematical analysis regarding the edge effect of a parallel plate capacitor. Could anyone help?
  50. A

    Edge browser reports my posted link here as unsafe

    Hi, I have a thread about 3D graphics in Programming/Computer science subforum: https://www.physicsforums.com/threads/setting-up-3-d-rotation-in-web-page.881634/#post-5550648 where I post a Dropbox link to an HTML5/Javascript file in post #16. When I run Physics Forum with the Edge browser...
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