NanoSapiens » Careers http://nanosapiens.net Science, technology, futurism Sun, 05 Feb 2012 16:14:29 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 125 hp motor arriving at Rampersad’s Electrical for repair http://nanosapiens.net/2012/02/careers/electrical-engineering/125-hp-motor-arriving-at-rampersads-electrical-for-repair/ http://nanosapiens.net/2012/02/careers/electrical-engineering/125-hp-motor-arriving-at-rampersads-electrical-for-repair/#comments Sun, 05 Feb 2012 13:03:04 +0000 vladowsky http://nanosapiens.net/2012/02/careers/electrical-engineering/125-hp-motor-arriving-at-rampersads-electrical-for-repair/ 125 hp motor arriving at Rampersad’s Electrical for repair
2463372164 6cebe6ed1e 125 hp motor arriving at Rampersads Electrical for repairelectrical engineering

Image by TaranRampersad

125 hp motor arriving at Rampersad’s Electrical for repair
2463374572 e80ea7f36c 125 hp motor arriving at Rampersads Electrical for repairelectrical engineering

Image by TaranRampersad

Practical Electrical Wiring: Residential, Farm, Commercial & Industrial: Based on the 2011 National Electrical Code

51qPyfNN6OL. SL160 125 hp motor arriving at Rampersads Electrical for repairelectrical engineering

  • Farm, Residential electric wiring
  • Commercial and industrial
  • Wiring applications
  • New Code based applications

This reference presents a comprehensive and detailed look at the critical revisions in technical topics driven by emerging technology and building-code changes comprise. Starting with a basic overview of the National Electrical Code and its enforcement, this handbook reviews the theory and practice of installing electrical wiring. The guidelines provide an essential context for understanding the major industry segments—residential, farm, commercial, and industrial—and the techniques help to

buynow small 125 hp motor arriving at Rampersads Electrical for repairelectrical engineering

List Price: $ 69.95

Price: $ 39.99

125 hp motor arriving at Rampersad’s Electrical for repair
2463376904 6d0f71363d 125 hp motor arriving at Rampersads Electrical for repairelectrical engineering

Image by TaranRampersad

Related Facebook pages

electrical engineering pages

http://www.facebook.com/search.php?q=electrical engineering&type=pages

Related Twitter topic

electrical engineering topics

Related Flicker images

electrical engineering images

Related youtube videos

electrical engineering videos

]]> http://nanosapiens.net/2012/02/careers/electrical-engineering/125-hp-motor-arriving-at-rampersads-electrical-for-repair/feed/ 0 Eyes on Xenon http://nanosapiens.net/2012/02/careers/physics-careers/eyes-on-xenon/ http://nanosapiens.net/2012/02/careers/physics-careers/eyes-on-xenon/#comments Sun, 05 Feb 2012 08:07:14 +0000 Jester
Xenon experiments use a completely different detection technology than solid state detectors such as CDMS. The detector is filled with xenon in the dual liquid/gas phase. When a xenon atom gets hit, it reports this fact to experimenters in two different ways. Photons produced when the atom returns from the excited state is promptly registered by the phototubes located around the detector volume. Besides, the electrons ionized from the atom drift slowly in the applied electric field, and they are registered after some delay. It turns out that the ratio of the scintillation (S1) and the ionization (S2) signals is different for nuclear recoils (that are due to WIMPs, once the experiment is shielded from neutrons) and electron recoils (that are due to ubiquitous backgrounds like photons).

Thus, by measuring the S1/S2 ratio xenon experiments are able reject most of the background. Furthermore, from the two signals and their relative delay it is possible to reconstruct where in the detector volume the hit occurred. Obviously, background events are more likely to occur near the walls of the tank. Therefore making a larger experiment not only increases the probability of registering a dark matter recoil event , but also decreases the background in the central volume - the property referred to as self-shielding. Add to this the good radioactive purity and relative availability of xenon (you just have to smash a lot of lightbulbs), and you understand why big xenon detectors are taking over the field of direct detection.

The prototype Xenon10 detector was not only a proof-of-principle but also a great success story. For some time, Xenon10 was providing the best constraint on the spin-independent WIMP-nucleon cross-section. In fact, it still sets the best limit for the WIMP masses in the 10-50 GeV range, while for larger masses it was later outraced by CDMS. After so much success, the group decided that things are going too smoothly, and set up a huge pillow fight to ease the tension. As a result, Xenon bifurcated into two rival experiments called Xenon and LUX; the latter was banished from sunny Italy into bottomless pits of South Dakota.

The two groups continued, each on its own, scaling up the same technology, each facing an orthogonal set of problems. Apparently, Xenon was the first to pull together. Last year calibrations were made and the physics run is due any time now. According to the official Xenon propaganda, just 40 live days is enough to push the limit on WIMP-nucleon cross section down to 6x$10^{-9}$ picobarns for a 100 GeV WIMP, almost a factor of 10 better than the current CDMS limit of 4x$10^{-8}$. If either of the two events reported by CDMS is really due to dark matter, by this summer we might have a discovery of the century. If not, the quest will continue, with more and more experiments joining in the race. One-ton monster versions of xenon experiments whose sensitivity should reach $10^{-11}$ picobarns are expected in the second half of this decade.

So tons of excitement ahead. As soon as first rumors appear, you know where to look ;-)
]]> Not the Higgs but dark matter is the true Holy Grail of high energy physics, given that only the purest can hope to discover it. For most of the past decade the leader of the quest to detect the dark matter particle has been the CDMS collaboration. Unfortunately, this amounted to setting better and better limits on the interaction strength of dark matter with nucleons, apart from this shadow of a hint of a possibility of two events announced last year. Although CDMS stays in the game and will continue taking data as super-CDMS, it is bound to lose the yellow shirt soon. For the moment, the primary contender is Xenon100 – a scaled up version of the Xenon10 detector that was in operation in 2006-2007 in Gran Sasso, Italy.

Xenon experiments use a completely different detection technology than solid state detectors xenon S12 Eyes on Xenonphysics careerssuch as CDMS. The detector is filled with xenon in the dual liquid/gas phase. When a xenon atom gets hit, it reports this fact to experimenters in two different ways. Photons produced when the atom returns from the excited state is promptly registered by the phototubes located around the detector volume. Besides, the electrons ionized from the atom drift slowly in the applied electric field, and they are registered after some delay. It turns out that the ratio of the scintillation (S1) and the ionization (S2) signals is different for nuclear recoils (that are due to WIMPs, once the experiment is shielded from neutrons) and electron recoils (that are due to ubiquitous backgrounds like photons).

Thus, by measuring the S1/S2 ratio xenon experiments are able reject most of the background.xenon selfshielding Eyes on Xenonphysics careers Furthermore, from the two signals and their relative delay it is possible to reconstruct where in the detector volume the hit occurred. Obviously, background events are more likely to occur near the walls of the tank. Therefore making a larger experiment not only increases the probability of registering a dark matter recoil event , but also decreases the background in the central volume – the property referred to as self-shielding. Add to this the good radioactive purity and relative availability of xenon (you just have to smash a lot of lightbulbs), and you understand why big xenon detectors are taking over the field of direct detection.

The prototype Xenon10 detector was not only a proof-of-principle but also a great success story. For some time, Xenon10 was providing the best constraint on the spin-independent WIMP-nucleon cross-section. In fact, it still sets the best limit for the WIMP masses in the 10-50 GeV range, while for larger masses it was later outraced by CDMS. After so much success, the group decided that things are going too smoothly, and set up a huge pillow fight to ease the tension. As a result, Xenon bifurcated into two rival experiments called Xenon and LUX; the latter was banished from sunny Italy into bottomless pits of South Dakota.

The two groups continued, each on its own, scaling up the same technology, each facing an orthogonal set of problems. Apparently, Xenon was the first to pull together. Last year xenon limits Eyes on Xenonphysics careerscalibrations were made and the physics run is due any time now. According to the official Xenon propaganda, just 40 live days is enough to push the limit on WIMP-nucleon cross section down to 6x$10^{-9}$ picobarns for a 100 GeV WIMP, almost a factor of 10 better than the current CDMS limit of 4x$10^{-8}$. If either of the two events reported by CDMS is really due to dark matter, by this summer we might have a discovery of the century. If not, the quest will continue, with more and more experiments joining in the race. One-ton monster versions of xenon experiments whose sensitivity should reach $10^{-11}$ picobarns are expected in the second half of this decade.

So tons of excitement ahead. As soon as first rumors appear, you know where to look icon wink Eyes on Xenonphysics careers

2846514233477399562 6402771733328051937?l=resonaances.blogspot Eyes on Xenonphysics careers

Original post source

]]> http://nanosapiens.net/2012/02/careers/physics-careers/eyes-on-xenon/feed/ 0 Georg Ohm Physics photos http://nanosapiens.net/2012/02/careers/famous-scientists/georg-ohm-physics-photos/ http://nanosapiens.net/2012/02/careers/famous-scientists/georg-ohm-physics-photos/#comments Sat, 04 Feb 2012 07:00:05 +0000 vladowsky http://nanosapiens.net/2012/02/careers/famous-scientists/georg-ohm-physics-photos/ La calle de la resistencia / Resistance’s Street
6446792505 d55d2e93eb Georg Ohm Physics photosfamous scientists

Image by kapitanbar
Calle en honor a Georg Simon Ohm, quien descubrio la ley que lleva su nombre, lo primero que aprende cualquier estudiante electrico/electronico.

Street in homage to Georg Simon Ohm, who discovered the physics law that carries its name.

Photographic Prints of Georg Simon Ohm, German physicist from Mary Evans

51fn BA0GaL. SL160 Georg Ohm Physics photosfamous scientists

  • This 10×8 Print features an image chosen by Mary Evans. Estimated image size 254x203mm.
  • High quality RA4 prints. Printed on Kodak Endura and Edge papers
  • Image Description: Georg Simon Ohm, German physicist, researcher into electricity.
  • For any queries regarding this item please contact Mary Evans c/o Media Storehouse quoting Media Reference 572542
  • © (c) Mary Evans Picture Library 2007

10×8 Print, Georg Simon Ohm, German physicist. Georg Simon Ohm, German physicist, researcher into electricity. . Chosen by Mary Evans. High quality RA4 prints. Printed on Kodak Endura and Edge papers.

buynow small Georg Ohm Physics photosfamous scientists

Price: $ 15.99

]]> http://nanosapiens.net/2012/02/careers/famous-scientists/georg-ohm-physics-photos/feed/ 0 Photographic Prints of Philipp Lenard/photo from Mary Evans http://nanosapiens.net/2012/02/careers/famous-scientists/photographic-prints-of-philipp-lenardphoto-from-mary-evans/ http://nanosapiens.net/2012/02/careers/famous-scientists/photographic-prints-of-philipp-lenardphoto-from-mary-evans/#comments Fri, 03 Feb 2012 07:00:20 +0000 vladowsky http://nanosapiens.net/2012/02/careers/famous-scientists/photographic-prints-of-philipp-lenardphoto-from-mary-evans/ Photographic Prints of Philipp Lenard/photo from Mary Evans

51nuAorPlsL. SL160 Photographic Prints of Philipp Lenard/photo from Mary Evansfamous scientists

  • This 10×8 Print features a cropped image chosen by Mary Evans. Estimated image size 254x203mm.
  • High quality RA4 prints. Printed on Kodak Endura and Edge papers
  • Image Description: PHILIPP EDUARD ANTON LENARD German physicist who won the Nobel Prize for Physics in 1905
  • For any queries regarding this item please contact Mary Evans c/o Media Storehouse quoting Media Reference 623430
  • © (c) Mary Evans Picture Library 2007

10×8 Print, PHILIPP LENARD/PHOTO. PHILIPP EDUARD ANTON LENARD German physicist who won the Nobel Prize for Physics in 1905 . Chosen by Mary Evans. High quality RA4 prints. Printed on Kodak Endura and Edge papers.

buynow small Photographic Prints of Philipp Lenard/photo from Mary Evansfamous scientists

Price: $ 15.99

Video Rating: 0 / 5

]]> http://nanosapiens.net/2012/02/careers/famous-scientists/photographic-prints-of-philipp-lenardphoto-from-mary-evans/feed/ 0 iPad App for Cerebral Palsy Patients Developed by Michigan Engineering Students http://nanosapiens.net/2012/02/careers/education/ipad-app-for-cerebral-palsy-patients-developed-by-michigan-engineering-students/ http://nanosapiens.net/2012/02/careers/education/ipad-app-for-cerebral-palsy-patients-developed-by-michigan-engineering-students/#comments Fri, 03 Feb 2012 01:03:04 +0000 vladowsky http://nanosapiens.net/2012/02/careers/education/ipad-app-for-cerebral-palsy-patients-developed-by-michigan-engineering-students/

A University of Michigan team of engineering students and rehabilitation engineers is building an app to help people whose impaired motor movements make it hard to manipulate touch-sensitive screens or press the small buttons on iPads and other mobile devices. tinyurl.com
Video Rating: 4 / 5

Science/engineering majors are dropping as college students opt for other options. Ana and John discuss a survey explaining why students are choosing their majors differently now. Is it the bad economic times? Are the students just lazy? Or is it our culture? What about you? Did you choose a high tech major? How do you feel about your choice? What about your work load compared to other students? And if you liked this video, “Like” it as well! icon smile iPad App for Cerebral Palsy Patients Developed by Michigan Engineering Studentseducation Subscribe to TYT U for more videos:www.youtube.com Submit a video to TYT U! We love hearing from students and faculty www.youtube.com Follow us on twitter! twitter.com twitter.com twitter.com

The Engineering Building, Seattle University
5393703046 77b051ba55 iPad App for Cerebral Palsy Patients Developed by Michigan Engineering Studentseducation

Image by Michael Holden
Seattle University’s Engineering Building. Is it just me or does it look a little like R2D2 in this photo? My office was in here when I managed all their computer labs and media stuff about a million years ago. These days Seattle U is pretty much the closest thing to my house that has interesting stuff to shoot, so I find myself there fairly often, either in the middle of the night or around sunrise. I was in the middle of shooting this when, for the first time ever, Security was dispatched to ask me just what the heck I was doing; I told him to check out flickr in a few days to find out, so here ya go. This is an HDR panoramic image: two frames of 3 exposures each beteween 3 and 13 seconds at f22.
More pics on my site at www.michaelholden.com — ping me at michael@superpod.com if you have any questions about the photos.

Related Facebook pages

engineering university pages

http://www.facebook.com/search.php?q=engineering university &type=pages

Related Twitter topic

engineering university topics

Related Flicker images

engineering university images

Related youtube videos

engineering university videos

]]> http://nanosapiens.net/2012/02/careers/education/ipad-app-for-cerebral-palsy-patients-developed-by-michigan-engineering-students/feed/ 0