• Discussion topic in physics for high school students

    Updated: 2009-09-30 19:02:21
    Hi, I'm currently one of the organizers of a seminar for talented high school students in my home town and one my task for the next session is to give a brief talk on some interesting subject in...

  • Medical Physics help

    Updated: 2009-09-30 18:17:06
    Hi, I've just graduated form high school and I want to join a medical physics program. For math, I've done trigonometry and geometry with intro to calculus. Before this course, I took algebra 1 and...

  • US manufacturer passes superconducting cavity benchmark

    Updated: 2009-09-30 18:05:50
    For the first time, a superconducting radio frequency cavity made by a US manufacturer passed the gradient benchmark required for the proposed International Linear Collider. The accelerating gradient is a measure of how much an accelerator can increase a particle's energy over a certain distance. Future accelerators, like the ILC, aim to achieve the highest possible gradient to build shorter, and hence cheaper, machines.

  • Vector Problem

    Updated: 2009-09-30 17:18:52
    *1. The problem statement, all variables and given/known data* A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 3.0 m, y = 6.0 m, and has velocity v...

  • ATLAS detector installed—in five minutes

    Updated: 2009-09-30 16:05:32
    A new video from the ATLAS experiment at CERN condenses six years of detector installation into less than six minutes. The video, which uses footage from eight Webcams and photography of the installation process in the detector's underground cavern, can be found on ATLAS' multimedia site and YouTube in one, three, and five minute versions.

  • Clowning space tourist lifts off

    Updated: 2009-09-30 15:15:28
    scientific american register Newsletters SA Community SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines Perspectives Ask the Brains We're Only Human Illusions Facts and Fictions in Mental Health Reviews and Recommendations Consciousness Redux Mind in Pictures From the Editor Letters Calendar science jobs subscribe Basic Science Biology Chemistry History of Science Math Physics Society Policy Everyday Science Science Education Space Astrophysics Extraterrestrial Life Galaxies Space Exploration Cosmology

  • Tsunamis sweep Samoa

    Updated: 2009-09-30 11:30:00
    scientific american register Newsletters SA Community SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines Perspectives Ask the Brains We're Only Human Illusions Facts and Fictions in Mental Health Reviews and Recommendations Consciousness Redux Mind in Pictures From the Editor Letters Calendar science jobs subscribe Basic Science Biology Chemistry History of Science Math Physics Society Policy Everyday Science Science Education Space Astrophysics Extraterrestrial Life Galaxies Space Exploration Cosmology

  • Computer Controlled Auto-variable Optical Fiber Attenuator

    Updated: 2009-09-30 10:59:20
    It is a computer controlled easy to use equipment for the continuous, automatic attenuation of the laser output power.

  • CCTV Video Over Fiber Transceiver for 6 Video & 8 Audio

    Updated: 2009-09-30 10:59:13
    Fiber Optic Transceiver 6-Channel Video & 8 Audio Fiber Optic Transmitter & Receiver is used for CCTV audio and Professional AV applications.

  • Drop and Insert Fiber Optic Multiplexer

    Updated: 2009-09-30 10:59:05
    They provide option of simplex/duplex audio/data,10/100M Ethernet, E1 and telephone signal Mux/Demux by the single unit.

  • Digital Video Muti-Channel Optical Fiber Converter

    Updated: 2009-09-30 10:58:55
    Fiber Optic Video Converter,Muti-Channels Camera's Video Fiber Optic Converter are widely used in CCTV and security surceillance.

  • Pacific Rim eyes post-quake tsunami

    Updated: 2009-09-30 07:30:00
    scientific american register Newsletters SA Community SA Digital Print Subscriber Services online sections News Features Mind Matters In-Depth Reports Fact or Fiction Extreme Tech Ask the Experts Edit This Slide Shows Image Gallery Videos 60-Second Science Podcast 60-Second Earth Podcast 60-Second Psych Podcast Science Talk Podcast Content Partners blogs Scientific American Observations Bering in Mind Extinction Countdown Solar at Home Expeditions scientific american magazine Subscribe INSIDE THIS ISSUE Features News Scan 50, 100 150 Years Ago Antigravity Skeptic Critical Mass Scientific American Perspectives Sustainable Developments Ask the Experts Recommendations Letters From the Editor Special Editions scientific american mind magazine Subscribe INSIDE THIS ISSUE Features Head Lines Perspectives Ask the Brains We're Only Human Illusions Facts and Fictions in Mental Health Reviews and Recommendations Consciousness Redux Mind in Pictures From the Editor Letters Calendar science jobs subscribe Basic Science Biology Chemistry History of Science Math Physics Society Policy Everyday Science Science Education Space Astrophysics Extraterrestrial Life Galaxies Space Exploration Cosmology

  • Investigating the Nature of Matter, Energy, Space and Time

    Updated: 2009-09-30 00:05:50
    On Thursday on Capitol Hill, the House Subcommittee on Energy and Environment of the Committee on Science and Technology will hold a hearing with the title Investigating the Nature of Matter, Energy, Space and Time. Witnesses will be Hugh Montgomery of the Jefferson Lab, Lisa Randall of Harvard, Pier Oddone of Fermilab and [...]

  • Particle physics lab to help aid earthquake engineering network

    Updated: 2009-09-29 16:26:15
    By partnering with a network of earthquake engineering research sites, Fermilab could ultimately help to reduce the losses caused by earthquakes and tsunamis. “The large physics experiments have a lot of experience in terms of technical collaborations between the universities’ researchers and engineers,” said Ruth Pordes. “We can bring that experience to the table.”

  • Symmetry in Physics, Pt. 2: Discrete Symmetries and Antimatter

    Updated: 2009-09-29 01:00:55
    And now another installment of “Symmetry in Physics.” Recall that in part 1 we introduced the idea of symmetry and mentioned the symmetries of spacetime, such as rotations or translations. These symmetries are all ‘continuous,’ in the sense that you can rotate/translate by any arbitrary amount. Now we’ll introduce some of the discrete symmetries of [...]

  • 5th Conference on Nuclear and Particle Physics

    Updated: 2009-09-29 00:00:00
    Conference: 19 Nov 2005 - 23 Nov 2005, Egypt. Organized by ENPA.

  • LHC (Large Hadron Collider) goes live mid Nov

    Updated: 2009-09-28 22:15:39
    Hi All, The LHC comes online to search the infinitely small (well Nearly!) particle Universe down to

  • Most precise measurement of the top quark mass

    Updated: 2009-09-28 16:23:59
    The most precise single measurement of the top quark has revealed a mass with a precision of better than one percent. A total of 630 selected top quark pairs in 4.3 inverse femtobarns of collected data yield the final result for the top mass: m_top = 172.64 +- 1.58 GeV/c2.

  • Funding through Fermilab for long-baseline neutrino research

    Updated: 2009-09-28 16:13:03
    The US Department of Energy has provided Fermilab with $9 million in funds from the American Recovery and Reinvestment Act for a long-baseline neutrino project. The laboratory is currently spending the funds on preliminary design. "This is an opportunity to send money into the technical community outside the laboratory," said Regina Rameika, a Fermilab scientist who is coordinating the design efforts.

  • Where to Live Around CERN

    Updated: 2009-09-28 03:26:48
    The main site of CERN, where most offices are, is a mile long and straddles the border between France and Switzerland (Suisse). Some nearby villages students/post-docs choose to live in include: Saint-Genis-Pouilly, France - pop 7,000 Thoiry, France - pop 4,000 Meyrin, Switzerland - pop 21,000 (city on lower right of map) Ferney-Voltaire, France - pop 7,000 (not shown) Geneva, Switzerland [...]

  • grad student disappearance

    Updated: 2009-09-25 01:52:43
    Rumors spread like wild fire for wee little grad students (1st and 2nd years) and one thing we would chat about around the chalk board was that grad students for some “unknown” reason disappear during their third year in grad school. Sometimes they return, sometimes they don’t… and they’re never seen or heard from again. [...]

  • Cryogenics makes good neighbors

    Updated: 2009-09-25 01:30:09
    In the world of superconducting technology, when you need to cool, you really need to cool. In August, Jefferson Lab asked Fermilab to pack up its backup turbine for its cryogenics refrigeration unit and send it halfway across the country.

  • Beatiful Prague, Al, and Quantum Gravity at the LHC

    Updated: 2009-09-24 20:54:25
    One of the advantages of being an experimental particle physicist is that we somehow enjoy certain flexibility in our work schedule.   It is not unusual at all to work very long hours even during weekends for extended periods of time (graduate students can tell you all about it), or to literally run on coffee (or [...]

  • Bringing power to the International Linear Collider

    Updated: 2009-09-24 16:26:47
    Figuring out how to provide the proposed International Linear Collider accelerator with the power needed to drive the machine's high-energy particle collisions calls for a creative technological solutions.

  • FlashForward: More on the science behind the story

    Updated: 2009-09-24 16:04:47
    FlashForward premieres tonight on the ABC television network. Our set of links will help you separate Flashforward fact from fiction.

  • Muon Collider

    Updated: 2009-09-24 14:38:12
    Fermilab recently launched a new web site describing the idea of a muon collider. Why think about a future collider when we haven’t even started using the LHC yet? Because it takes a really long time to design and build one. The LHC was conceived a few decades ago, and the LHC [...]

  • Driving nuclear energy with proton accelerators

    Updated: 2009-09-23 18:06:47
    The global demand for electricity is likely to double by 2030. But could particle accelerator technology help solve the world energy crisis? According to scientists, accelerators might make it possible to use an alternative fuel to produce nuclear energy.

  • NUPPAC' 09: 7th Conference on Nuclear and Particle Physics

    Updated: 2009-09-23 00:00:00
    Conference/exhibition: 11 Nov 2009 - 15 Nov 2009, Sharm El-Sheikh, Sinai, Egypt. Organized by Egyptian Nuclear Physics Association (ENPA).

  • 3rd Environmental Physics Conference

    Updated: 2009-09-23 00:00:00
    Conference: 19 Feb 2008 - 23 Feb 2008, Aswan, Egypt. Organized by ENPA.

  • Relationships in Physics Graduate School

    Updated: 2009-09-22 21:06:48
    Doing a quick poll of graduate students in our department showed the following: Atomic Physics: 5/10 grad students are married (2 of those have kids) Particle Physics (CMS group): 1/10 grad students are married (none of those have kids) Most likely, this difference is because “Atomic” physics involves small, table-top experiments, while “Particle” physics involves large experiments located [...]

  • Flashforward author Robert J. Sawyer on the LHC, Higgs, and Hollywood

    Updated: 2009-09-22 12:18:17
    This Thursday, the ABC television network will premiere FlashForward, a drama series based on Robert J. Sawyer’s science-fiction novel of the same name. In an e-mail interview with symmetry, Sawyer discussed why he chose the LHC for the plot of Flashforward, how he relates the search for the Higgs to dinosaurs, and which physics laboratory is next in line for the science-fiction treatment.

  • Meeting our PIREs

    Updated: 2009-09-22 05:04:44
    Your humble correspondent hasn’t had a chance to write much lately, as I have been dealing with an unfortunate confluence of events that require my attention. I’ll try to catch up on some of these events over the next few weeks/posts. In a previous post, I mentioned our engagement in research on future silicon pixel [...]

  • BIOSTEC 2010

    Updated: 2009-09-22 00:00:00
    Conference: 20 Jan 2010 - 23 Jan 2010, Valencia, Spain. Organized by INSTICC.

  • The Next Discovery Of Fermilab

    Updated: 2009-09-21 22:30:07
    The question of what will the next discovery at Fermilab be was asked in the thread of a recent article, and I initially answered it there, but then thought that expanding my answer makes excellent material for an independent article. Therefore, below I have tried to put together my own personal list of the places from where a unexpected new Tevatron discovery may come and hit us, in the near future. read more

  • Become A Fan Of The Tevatron!

    Updated: 2009-09-20 22:16:54
    I am spending my time in the CDF Control Room this week (seven days, from 4PM to midnight), as a Scientific Coordinator. My job is to work with my crew to ensure that the experiment collects good data as efficiently as possible. The data I am talking about is, of course, provided by our glorious accelerator, the Tevatron collider. Today I will tell you how the Tevatron is doing these days, and doing that will prepare the ground to my suggestion that you should become a fan of this wonderful machine. A short introduction read more

  • What does 7 TeV mean?

    Updated: 2009-09-20 17:06:52
    Inspired by Regina’s excellent post on the CERN accelerator complex, I thought I’d give you some fun facts about the LHC (in “human units”). 1) What does 7 TeV beam energy mean? Please look at Wikipedia for a discussion of units. Briefly, 1 Joule is the energy of a 1 Kilogram mass moving with a speed of [...]

  • Symmetry in Physics, Part 1: Spacetime Symmetry

    Updated: 2009-09-20 15:46:33
    One of the reasons why physicists often wax poetic about the beauty of physics is that so much of the field has based on symmetry, and humans find symmetry beautiful. But it is partly because people have an intuitive sense of what symmetry is that there aren’t many attempts to really explain the central role [...]

  • Meetings in my PJs

    Updated: 2009-09-17 21:45:40
    My close friends (and now blog enthusiasts) are familiar with my favorite part of a pair of pajamas. They’re a pair of green flannel pants with monkey faces on them, lovingly referred to as my “monkey pants”. They look something like this: Upon arriving home from work - most typically in the winter, I’ll relax by [...]

  • Cambridge CNT Symposium 2009

    Updated: 2009-09-17 00:00:00
    Conference: 13 Nov 2009, Cambridge, United Kingdom. Organized by Cambridge CNT society.

  • Symposium Mammographicum 2010

    Updated: 2009-09-17 00:00:00
    Conference/exhibition: 11 Jul 2010 - 13 Jul 2010, The Arena and Convention Centre, Liverpool, Liverpool L3 4FP, United Kingdom. Organized by Happening Event Management.

  • Three Reasons Why the Large Hadron Collider Will NOT Destroy the Earth

    Updated: 2009-09-16 06:04:28
    One of the things I did at Dragon*Con a couple of weeks ago was to give a talk on the physics of the

  • Bonjour de France

    Updated: 2009-09-16 01:03:13
    Comment vas-tu? Je vais bien! You’re driving along in France and suddenly you see this sign on the right side of the road - would you know what to do? Are you comfortable enough with French to get around safely? If you are planning to visit CERN or the Geneva area I recommend learning at least a [...]

  • The Pantheons and CMS Regional Reconstruction

    Updated: 2009-09-15 07:40:34
    Howdy! LHC fans, and welcome to my US LHC blog area.  It is a great pleasure for me to have this opportunity to communicate what we are up to at the LHC from a more personal perspective.  I hope you enjoy it!! This is my first post and so I thought it was a good idea [...]

  • Back in the USA

    Updated: 2009-09-13 16:06:44
    I am back after a week’s trip to CERN. It was a productive week. I gave a talk on the work I have been doing and received valuable feedback in the sense that some of my results were met with a bit of skepticism; it took me a day of work to produce more plots, [...]

  • Sky

    Updated: 2009-09-12 16:57:39
    The roof of one of Renzo Piano's BCAM buildings at LACMA, with the last light of the day in the sky yesterday. -cvj

  • Latest From the LHC

    Updated: 2009-09-11 16:31:08
    Things seems to have been going well at the LHC recently, with the current schedule expecting injection of beams in a little more than two months from now, on Thursday November 19. After that, the plan is for a week and a half of beam commissioning at 450 GeV, and 450 GeV collisions at [...]

  • On working in physics

    Updated: 2009-09-08 15:18:48
    Since the workshop in Leysin, I’ve been in the process of moving back to New York. Why move back now, you may ask? It’s a very typical story. I thought a long time about whether or not I wanted to actually blog about this. I decided to go ahead only because it’s an interesting problem [...]

  • Tourist Destination

    Updated: 2009-09-07 08:41:15
    I’ve written about working in the ATLAS control room before, but I haven’t spent too much time there recently.  On Friday, I was there all day and the new visitor’s center was in full swing. The visitor’s area at ATLAS has a glass wall (see picture here) that allows visitors to see into the [...]

  • The Worst Nightmare Scenario For CERN ? A 150 GeV Higgs.

    Updated: 2009-09-04 20:58:41
    A few days ago I produced a summary of a poster I presented at Physics in Collisions this week, which dealt with the searches for the Standard Model Higgs boson that CMS will undertake, and the results it can obtain in a scenario when a certain amount of data is collected at the full design energy of the LHC. Here, instead, I wish to summarize the other poster I presented at the same venue, which concerned the combination of the most sensitive search channels, the sensitivity of CMS with a given amount of data, and the derating of its significance reach or observation power entailed by the running of LHC at a smaller-than-design beam energy. But I will do this only as a way of introducing a more interesting discussion, as you will see below. read more

  • Poster 1: Higgs Searches With CMS

    Updated: 2009-08-29 17:51:12
    Today I wish to offer you the preview of a poster which I am going to show on September 1st in Kobe, Japan, at a session of the 29th edition of the Physics in Collisions conference. read more

  • Better hurry, LHC... Tevatron is catching up!

    Updated: 2009-08-23 01:26:55
    What’s almost as hot as the LHC? Fermilab’s particle accelerator, the not-quite-so world

  • The New Odd Couple? Point Particles and Gravity

    Updated: 2009-08-21 19:08:27
    Have quantum particles and gravity been reconciled? Whatever will we do with all that string we

  • How Isaac Newton did it without Super-Computers

    Updated: 2009-08-12 21:06:57
    This post is dedicated to those who are still reading and to the dead, who cannot read anymore. In S

  • El LHC funcionará a medio rendimiento hasta 2011

    Updated: 2009-08-12 01:43:11
    El gigantesco acelerador LHC está arreglado lo suficiente para poder empezar a funcionar en noviembr

  • El Tevatrón del Fermilab mide la masa del bosón W con mayor precisión que el LEP-II del CERN

    Updated: 2009-08-11 01:48:28
    Para el no experto puede parecer sorprendente, pero la precisión obtenida por el LEP II para la mas

  • Large Hadron Collider facing more problems

    Updated: 2009-08-04 05:22:03
    This New York Times article on the Large Hadron Collider is disturbing for anyone who’s been l

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