What is Cell: Definition and 954 Discussions

Cell is a multi-core microprocessor microarchitecture that combines a general-purpose PowerPC core of modest performance with streamlined coprocessing elements which greatly accelerate multimedia and vector processing applications, as well as many other forms of dedicated computation.It was developed by Sony, Toshiba, and IBM, an alliance known as "STI". The architectural design and first implementation were carried out at the STI Design Center in Austin, Texas over a four-year period beginning March 2001 on a budget reported by Sony as approaching US$400 million. Cell is shorthand for Cell Broadband Engine Architecture, commonly abbreviated CBEA in full or Cell BE in part.
The first major commercial application of Cell was in Sony's PlayStation 3 game console, released in 2006. In May 2008, the Cell-based IBM Roadrunner supercomputer became the first TOP500 LINPACK sustained 1.0 petaflops system. Mercury Computer Systems also developed designs based on the Cell.
The Cell architecture includes a memory coherence architecture that emphasizes power efficiency, prioritizes bandwidth over low latency, and favors peak computational throughput over simplicity of program code. For these reasons, Cell is widely regarded as a challenging environment for software development. IBM provides a Linux-based development platform to help developers program for Cell chips.

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  1. J

    Is my understanding of the working principle of a solar cell correct?

    1. Photons having enough energy to transmit an electron from the conduction band to the valence band must fall on the solar cell. 2. The cell is composed of a flat PN diode with the n-type layer on top. 3. As photons hit the n-layer, electrons and holes get formed. 4. Due to the voltage barrier...
  2. R

    Can cell electrodes in series share the same current collector?

    Sorry if the answer is obvious, but I was wondering if positive and negative electrodes (cells in series) can share the same current collector as depicted below? I want to create a 12V battery with cells inline in series without creating cells with individual current collectors. Note that the...
  3. BillTre

    Interesting Path to Eukaryotic Cell Complexity Proposed

    The Inside-Out hypothesis, proposed in this paper (open access), explains the origin of several eukaryotic cellular structure based upon the cell geometry resulting from expansions cell protrusions becoming the cell's non-nuclear cytoplasm. Here is their summary diagram: and their caption...
  4. berkeman

    Medical Stem Cell Injections Improve Motor, Sensory Function Post Spinal Cord Injury

    This is a wonderful area of active research. Early in my EE career, I was interested in trying to use IC-scale nerve interfaces to bypass spinal cord injuries, but the science of interfacing electronics to nerve cells for long-term use was not developed enough. Even today, it is a problematic...
  5. S

    How can light hit one part of a ganglion cell but not another part?

    In regards to human vision and specifically the retina and ganglion cells. I find it hard to comprehend that somehow the light can only hit one part of the retinal ganglion cells (either the centre or the surround) and not the other? Doesn't light go everywhere? Is the lens focusing light so...
  6. BWV

    Medical Successful CRISPR treatment of a Sickle Cell patient

    Encouraging news that the technology can potentially cure a number of genetic disorders https://www.npr.org/sections/health-shots/2019/11/19/780510277/gene-edited-supercells-make-progress-in-fight-against-sickle-cell-disease
  7. J

    Solar heat gain on a typical solar cell

    what will be the joules per meter using thermal gain and wattage gain from a solar cell if the cell is in an insulative vacuum not counting the thermal degredation of 25% for wattage loss due to heat gain
  8. M

    MATLAB How can I efficiently extract elements from a large cell in MATLAB?

    Hi PF! I have a cell 1 X 5001. Each component within is a double matrix of different sizes, approximately 100 X 3. The entire cell is called a. Then when trying to extract component (1,2) from each of the 5001 matrices I type a{:}(1,2), but upon executing this MATLAB complains "Expected one...
  9. P

    I Primitive unit cell (Diamond)

    Hi guys , I want to construct a primitive unit cell for diamond, which is made of a fcc lattice and a basis of 2 carbons atoms. I know that a primitive unit cell isn't unique but the two variants I get are drastically different . As far as I can see they both include 2 whole atoms/points in the...
  10. D

    Electrochemistry and cell electroplating

    Hello, I have a question in regards to electroplating. If i have a cell with let's say a zinc cathode and an inert anode in a solution of copper ions, and I turn on the current, what reaction will counter the reduction of copper ions to balance the electronegativity and what will be the...
  11. Wrichik Basu

    How do SRAM and DRAM differ in terms of circuitry and data storage?

    Summary: How does a cell of SRAM work? I have computer science minor, and we have been given the task of finding out the differences between SRAM and DRAM. Simple enough? I thought so, until I got into the circuitry of a SRAM cell and got interested in finding how it works for storing, reading...
  12. X

    MCNP error surface 0 not found for cell 101

    Hello, I am working through the MCNP manual and am experiencing the following error as well as warning when trying to run the sample problem from the manual. The fatal error I get is "fatal error. surface 0 not found for cell 1050." I have upload the output file with the errors in case I...
  13. Q

    Solar cell absorption efficiency in COMSOL Multiphysics

    Hi. I am studying the effect of plasmonic nanoparticles on solar cells. Is there a way to calculate absorption efficiency in different layers of tandem solar cells in COMSOL Multiphysics.
  14. Mayan Fung

    Perovskite solar cell J-V scan

    Hi all, I am working on perovskite solar cell related studies. J-V curve (current density-voltage curve) is one of the important measurements to determine the performance of the device. In practice, we perform the reverse scan first then then followed by the forward scan. There is usually a...
  15. cianfa72

    Voltaic Cell behaviour as described in this video

    Hi, googling for Voltaic cell I found this video about it. At minute 2:35 to 2:54 you can see that, without any electrical conductor connected between electrodes, in the Copper half-cell the metal electrode (Cathode) gets an amount of negative charges (electrons). Basically what described there...
  16. Mcp

    Why is a Hexagonal Prism Used as the Unit Cell for 3D HCP?

    My textbook states that all the 14 bravais lattices have one of the 7 types of parallelepiped (7 crystal systems) that can be used as an unit cell. However in case of 3D HCP textbooks don't talk about this parallelepiped, rather they consider a hexagonal prism as the unit cell. Why is it so...
  17. andrewkirk

    Telling the difference between a live and dead cell in a sealed tube

    A friend is writing a story in which somebody steals a frozen, non-fertilised ovum from an egg bank, meaning to do something with it (not sure what). The thief then forgets about it and finds the tube containing the ovum in her pocket a few days later. She looks at it under a microscope. The...
  18. K

    Cell Metabolism and Static, Unidirectional Magnetic Fields

    Can anyone explain why an artificial magnetic field may or may not promote an increase in cellular metabolism?
  19. cianfa72

    Daniell cell initial equilibrium

    Hello, consider again a simple Daniell cell with salt bridge in place but no external electric connection between electrodes. Reading from some source e.g. link1 it seems upon Zinc and Copper metal rods are dipped into their own ions solution, both will gain a negative charge (-) due to an...
  20. J

    Understanding the chemical process in a fuel cell

    Hello, I'm taking an energy class and I'll be giving a presentation on fuel cells. I was wondering if I could get some help understanding the whole process of the paper below. Unfortunately, I can't post the article because of copyrights. To summarize, it's a one compartment H2O2 fuel cell with...
  21. cianfa72

    Galvanic cell - open circuit voltage and EMF

    Hi, having not a deep knowledge of electrochemistry I've some doubts about processes involved in a galvanic cell. Take for instance a Zn/Cu Daniell cell for which E0cell is 1,10V. That means emf for it is 1,10V. Starting to read from how battery works I had a first understanding of how...
  22. hurreechunder

    Question about the Li -> Li+ + e- half cell reaction in a LiB battery

    Hi all - I have a question on the redox reactions in Li ion batteries. I'm not being able to figure out where the Li-> Li+ + e- half cell reaction is actualy happening. Take the standard LCO reaction: LiCoO2 + C6 -> LiC6 + CoO2 (in reality, only 50% of the Li reacts this way, but let's ignore...
  23. A

    Calculate EMF & Resistance of Solar Cell

    A solar cell generates a potential difference of .1v when a 500ohm resistor is connected across it, and a potential difference of .15v when a 1000ohm resistor is substituted. What is A.) the internal resistance of the solar cell and B.) the emf of the solar cell I am a bit confused because...
  24. karush

    MHB Tech Troubleshooting: Starting with Your Cell Phone

    Ok had to start this with a cell phone But need help even with first step Just focusing in on #3 #4 I think is related
  25. A

    Cell and membrane volume physics

    Homework Statement A typical human cell is approximately 10 μm in diameter and enclosed by a membrane that is 4.2 nm thick. To simplify the calculations, model the cell as a sphere. 1) What is the volume of cell? (in μm^3) 2) What is the volume of cell membrane? (in μm^3) 3) Percent cell volume...
  26. M

    Is an Air Gap OK When Micropipetting? Biology Q&A

    Used a P100 to pipette 93.6 micro-litres of fluid. There was an air gap in the pipette tip the first time I did it but no air gap the second time. I'm assuming there shouldn't be an air gap but can somebody tell me for sure?
  27. Z

    Struggling to understand cell cards in MCNP

    For example, I don't understand slide 4, line 4 of the link below. I know that the first three numbers are the cell number, material number and density of water. But what do the next 6 numbers mean (2, -1, 4, -3, 5, -6)? Similarly on line 8, what do -0.001293 (101, -102, -100) mean? Thank you...
  28. S

    Hydrogen to AC -- From the Fuel Cell to the Grid

    Fuel cells quickly provide electricity from H2 when switched on. But what exact steps get to Grid voltage? Are there many small inverters, and if so, how do they keep the output in step? What sort of efficiencies are there?
  29. I

    Chemicals coded to leave a cell and then come back?

    Is there such a thing of a protein (or some other biochemical) being coded to leave the cell, do something (or not) and then return for another function in the cell? Or in some way go "in and out" throughout its existence? Or at the least that would "take a leave of absence" and then become...
  30. S

    Anode designation in a lead acid cell

    Hi, I am trying to determine the conventional cathode and anode designations for lead acid cells. From what I have researched: Anode is where current flows in the device, or where electrons flow out of. In a secondary cell the designations for anode and cathode are based on the discharge...
  31. José Ricardo

    I as a whole and not only in itself

    Biologically speaking, why I'm not a cell in my brain, or just heart, I'm me as a whole. How lucky was I to be myself as a whole, not just another cell inside my body?
  32. M

    I Why can't I reach every cell in a 3x3 square?

    Hi, I was playing this game in which you start from any cells of a 3x3 or 5x5 square and draw a line that loops through every cell in the box. The line can go only through a vertical or horizontal side (not diagonally). When you start from certain cells (problem cells), you can't reach at...
  33. L

    I Can a 7.2 Volt Driver Rotate a 300 Pound Weight with Ease?

    I have a device that is able to rotate on a shaft a weight of 40 pounds with less effort than it does to rotate a weight of 10 pounds on the same shaft. The rotation of the 40 pounds can be done simply by rotating the shaft by hand using only a slip motion. This design can rotate weights over...
  34. barryj

    How is DNA arranged in a human cell?

    I have read many sources on DNA and still have a few questions. Let me start with this one, and depending on the answers I will ask more. Question 1. f I were to look into a human cell how would I see the DNA? Is there a single very long copy of the DNA string or are there two copies. Question...
  35. somasimple

    Exploring the Limits of the Nernst Equation in Concentration Cell Experiments

    Hi All, (Just for information and understanding), If we have a concentration cell experiment like the image uploaded, in a concentration cell, the solutes are supposed to be of the same kind, iI.e. CuCl2 (?). I suppose it is possible to add to the left vat a m quantity or volume of CuSO4 to...
  36. I

    What do macrophages do with absorbed cell parts?

    I was wondering what happens to all the "debris" that is absorbed by macrophages? Do they process them to the waste system or is it possible that they can feed them to the needs of neighboring cells? Or do these different chemical processes of eating nutrition vs getting rid of waste not mix...
  37. J

    Making perovskite solar cell crystals w/o heating

    I'm a high schooler involved in a research in which we aim to grow perovskite crystals in microgravity. I've recently come across this article (https://scitechdaily.com/researchers-develop-a-better-method-for-making-perovskite-solar-cells/) in which they explain how to grow better perovskite...
  38. A

    Fuel cell mass flow rate magnitudes

    Hello, Can you tell me please the mass flow rate of hydrogen and oxygen per unit of area of electrodes in fuel cells? Or if you have information on the mass flow rate of hydrogen and air per volume of fuel cell stack? I understand this may vary, but I am looking for publications or other...
  39. Krushnaraj Pandya

    Calculating EMF of a Cell: Ni(s) | Ni2+ (0.1M) || Au3+ (1.0M) | Au (s)

    Homework Statement The EMF of the cell : Ni(s) | Ni2+ (0.1M) || Au 3+ (1.0M) | Au (s) is [ given E°(Ni2+/Ni)= -0.25V; E° (Au3+ / Au )= +1.50V ] Homework Equations E°cell=E°(cathode)-E°(anode) For SRP. Nernst equation The Attempt at a Solution SOP is given, therefore converting to SRP we...
  40. jim mcnamara

    "bushy" human evolution - commentary in Cell

    https://www.cell.com/trends/ecology-evolution/fulltext/S0169-5347(18)30117-4The authors do not seem to use the term bushy to describe the non-linear evolution of Homo sapiens, but other authors have used it. They use 'African multiregionalism' instead. And also they exclude panmyxia (free for...
  41. B

    Calculate E cell for the following reaction at 25deg celcius

    Homework Statement Calculate E cell for the following reaction at 25deg celcius 3 CU(s) + 2 MnO4-(aq) + 8 H+(aq) →2 MnO2(s) + 3 CU^2+(aq) + 4 H2O(l) Given: [CU^2+] = 0.010M, [MnO4-] = 2.0M, [H+] = 1.0M I’ve posted a picture of my work, if someone could just let me know if I answered the...
  42. B

    Calculate E cell for the following reaction at 25deg celcius

    Homework Statement 2 IO3−(aq) + 6 H+(aq) + 10 I−(aq) →6 I2(s) + 6 H2O(l) I didn’t want to re-type all of this up but I uploaded of picture of my work for this problem. I was just wondering if I completed it correctly and if not if someone could guide me in the right direction. Thank you!
  43. Sanborn Chase

    Number of Cell Types in Human Body

    Are there estimates of the number of different cell types in the human body?
  44. BillTre

    LINE1 Transcripts Needed to Get Past 2 Cell Stage in Mammals

    LINE 1 transcripts have been shown to be necessary for mouse (and maybe all mammals?) embryos to go beyond their 2-cell stage in development. Science mag news article here. LINE (Long Interspersed Nuclear Elements) 1 are retrotransposons (mobile selfish DNA elements) that are found in...
  45. SchroedingersLion

    How Do Pockels Cells Differ from Faraday Rotators in Polarization Control?

    Greetings, another question to the Pockels Effect, maybe someone can answer this. Pockels Cells are called "voltage controlled waveplates", since the voltage changes the birefringence of the material, leading to the same birefringence induced change of total polarisation plane than in wave...
  46. K

    A Symmetries of a Diamond Unit Cell - Point Group Confusion

    Dear All, I've been recently reading the very clear text of Burns and Glazer entitled Space Groups for Solid State Scientists in the context of my thesis which requires understanding of symmetries of crystals, more specifically symmetries of (approximate triply periodic minimal surfaces)...
  47. T

    B Why Do We Lose Cell Phone Connection Outdoors Without Buildings or Cars Nearby?

    If Cellular network towers are supposedly divided in cells , like this image , then why do we loose connection even when outdoors and not inside or near any buildings/cars. Also why is it common to see more than 1 cell tower near each other?
  48. R

    Harmonic Oscillator and Volume of Unit Cell in Phase Space

    Long time no see, PhysicsForums. Nevertheless, I have gotten myself into a statistical mechanics class where the prof is pretty brutal and while I can usually manage, this problem finally has me stumped. I'd like to be nudged in the right direction, not outright given the answer if possible. I...
  49. L

    MCNP Why does it say F5 tally is not in any cell?

    Sorry for two questions in a row, this one we have been stumped on for the entire day We're getting "fatal error. detector no. 1 of tally 5 is not in any cell.", What could be causing this? In the manual and all examples we've seen, nobody has parameters specifying cell location for the...
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