GATE - Answer key available in its own website

GATE 2013

GATE 2013 Question Paper and Answer Keys are available now

CSIR NET result published

NET result Published .... Check it's official website

Indian Institute of Technology, Indore

Indian Institute of Technology, Indore

 

PG/Ph.D Programme Admission-2013

IIT Indore invites applications from highly motivated and research oriented students for its following Full Time Regular PG and Ph.D Programmes

School of Basic Sciences

M.Sc/M.Sc + Ph.D Dual Degree

Chemistry: Minimum first Class (60% marks for General/OBC (55% for SC/ST) category in aggregate or as specified by the university/institute, or CPI/CGPA of 6.0 for Genera/OBC (5.5 for SC/ST) category on the scale of 10, with corresponding proportional requirements when the scales are other than on 10, or a first class as specified by the university/institute awarding the degree) bachelor’s degree with Chemistry as a subject for three years/six semesters and should have passed Mathematics at (10+2) level, and qualification in JAM-2013 in Chemistry

Particle caught flip-flopping

Particle caught flip-flopping

D meson’s switch between matter and antimatter could help uncover new particles

 

By Andrew Grant

A particle with an identity crisis could provide the next big discovery at the world's largest particle accelerator. The D meson has been caught in the act of flipping between matter and antimatter, researchers report online March 5 in Physical Review Letters.

D mesons, like other mesons, are short-lived particles that emerge from the shrapnel of proton collisions at CERN’s Large Hadron Collider outside Geneva. All of these particles decay within tiny fractions of a second. But four mesons, including the D, occasionally do something strange first: They become antiparticles. In the same vein, anti-D mesons can switch and become mesons before they decay. While experimenters have observed B, strange B and K mesons exhibit this shifty behavior, this is the first time physicists have seen D mesons that start as matter end up decaying as antimatter, and vice versa.

The next step, says Syracuse University physicist Steve Blusk, one of about 600 members of the team that made the discovery, is to compare the number of D meson decays with the number of anti-D meson decays. Those numbers should be equal, but physicists are hoping that one number is slightly larger than the other, Blusk says, because that would mean an undiscovered particle interferes with the D meson's oscillations.

Indian Institute of Science Education and Research, Mohali

Indian Institute of Science Education and Research, Mohali - Ph.D Admission

The Indian Institute of Science Education and Research invites applications for an interdisciplinary Ph.D in the Humanities and Social Sciences

Eligibility Criteria: M.A./MS/M.Phil/ B.Tech/B.Arch or equivalent degree in any subject with minimum 60% marks (or equivalent grade)

Selection Criteria: Please send email to hssphd@iisermohali.ac.in with the following; CV; a one page statement of Intent outlining research interests and previous experience; graduate transcripts, percentile in national level exams taken such as UGC NET, GATE; names and contact details of 3 referees

The shortlisted candidates will be required to appear for a research aptitude test and an interview at IISER, Mohali

The last date for submitting application for the August, 2013 session is 15th April, 2013

No vacancy around stars

No vacancy around stars 

 

Planets pack tightly in the Milky Way

By Andrew Grant

Planetary systems in our galaxy are packed to the brim, according to a new study — throw in another orb and all hell will break loose. The study, posted February 28 at arXiv.org, argues that planets around other stars share an evolutionary history similar to that of the solar system’s eight planets.

“This study supports results that have been building for a long time,” says Jack Lissauer, a space scientist at NASA Ames Research Center in Moffett Field, Calif., who was not involved in the study. In 2011, he discovered Kepler-11, a star with planets so tightly packed around it that five of them have smaller orbits than Mercury’s.

Chennai Mathematical Institute-PhD admission

Chennai Mathematical Institute B.Sc / M.Sc / Ph.D Admission 2013 

1. B.Sc (Hons) in Mathematics and Computer Science (3 year integrated course)

2. B.Sc (Hons) in Mathematics and Physics (3 year integrated course)

3. M.Sc: Mathematics, Applications of Mathematics, Computer Science

4. Ph.D: Mathematics, Computer Science, Physics

Eligibility

B.Sc (Hons) Mathematics and Computer Science: 12th standard or equivalent

B.Sc (Hons) Mathematics and Physics: 12th standard or equivalent

M.Sc (Mathematics): B.Sc (Math)/B.Math/B.Stat/B.E./B.Tech

M.Sc (Applications of Mathematics): B.Sc (Math, Physics, Statistics)/B.Math/B.Stat/B.E./B.Tech

M.Sc (Computer Science): B.E./B.Tech/B.Sc (C.S.)/BCA or B.Sc (Math) with a strong background in CS

Ph.D (Mathematics): B.E./B.Tech/B.Sc (Math)/M.Sc (Math)

Ph.D (Computer Science): B.E./B.Tech/M.Sc (C.S.)/MCA

Ph.D (Physics): B.E./B.Tech/B.Sc (Physics)/M.Sc (Physics)

Entrance Exam: For all the programmes, applicants will have to take an entrance examination on 15th May, 2013, Wednesday

Tweezers Work Well Under Pressure

Courtesy R. Bowman/University of Glasgow

Optical Trapping at Gigapascal Pressures

Richard W. Bowman, Graham M. Gibson, Miles J. Padgett, Filippo Saglimbeni, and Roberto Di Leonardo

Phys. Rev. Lett. 110, 095902 (2013)

Published February 28, 2013

Diamond anvil cells can apply millions of atmospheres of pressure to a solid or liquid, while allowing it to be observed through the diamond “windows.” For the first time, researchers have introduced optical tweezers into one of these cells in order to trap sample particles. The experiment, described in Physical Review Letters, directly measured the viscosity of the water surrounding the particles. Further development of this technique could permit investigations of the mechanical changes in biological cells and other soft materials placed under high pressure.

Star-Shaped Waves

J. Rajchenbach et al., Phys. Rev. Lett. (2013)

Observation of Star-Shaped Surface Gravity Waves

Jean Rajchenbach, Didier Clamond, and Alphonse Leroux

Phys. Rev. Lett. 110, 094502 (2013)

Published February 28, 2013

The ocean can produce exotic wave forms, such as “freak” waves, when normal waves combine in just the right way. These unusual wave patterns can—theoretically—take on a variety of different shapes, but researchers have so far only managed to produce a few distinct cases in the lab. As reported in Physical Review Letters, Jean Rajchenbach and colleagues at CNRS and the University of Nice in France have produced star- and polygon-shaped standing waves by vertically shaking a vessel filled with liquid oil.

Like Prefers Like, Except in a Virus

S. V. Venev and K. B. Zeldovich, Phys. Rev. Lett. (2012)

Segment Self-Repulsion is the Major Driving Force of Influenza Genome Packaging

Sergey V. Venev and Konstantin B. Zeldovich

Phys. Rev. Lett. 110, 098104 (2013)

Published February 28, 2013

Influenza and certain other viruses have a segmented genome, in which each segment is a strand of RNA that codes for a particular protein. New viruses forming from the many genome copies in an infected cell must amass one of each type of segment—and no duplicates—in order to go on to infect other cells and replicate. A better understanding of how segments recognize each other to form a complete genome could therefore lead to new antiviral drugs. In Physical Review Letters, Sergey Venev and Konstantin Zeldovich at the University of Massachusetts Medical School, Worcester, use a simple statistical model to predict the most efficient segment-signaling mechanism for avoiding duplicated genetic material.

Why the Solar Wind Blows Hot and Cold

Miloslav Druckmüller/Brno University of Technology, Peter Aniol, Vojtech Rusin

 

 

 

 

 

 

Sensitive Test for Ion-Cyclotron Resonant Heating in the Solar Wind

Justin C. Kasper, Bennett A. Maruca, Michael L. Stevens, and Arnaud Zaslavsky

Phys. Rev. Lett. 110, 091102 (2013)

Published February 28, 2013

One of the biggest puzzles of the solar wind is why certain ions in the wind are hotter than others. The temperature of helium ions, for example, is on average 5 times higher than that of hydrogen ions. Now, writing in Physical Review Letters, Justin Kasper of the Harvard-Smithsonian Center for Astrophysics, Massachusetts, and collaborators present a model that demonstrates how certain plasma waves, called ion cyclotron waves, will preferentially heat heavier ions travelling below a threshold velocity.

Rainbow Pattern May Allow Laser Damage Monitoring

Published March 1, 2013  |  Physics 6, 24 (2013)  |  DOI: 10.1103/Physics.6.24

Intense light pulses that can precisely sculpt solid materials also generate dazzling rainbow patterns that reveal information about the surface.

Ciliary White Light: Optical Aspect of Ultrashort Laser Ablation on Transparent Dielectrics

Yi Liu, Yohann Brelet, Zhanbing He, Linwei Yu, Sergey Mitryukovskiy, Aurélien Houard, Benjamin Forestier, Arnaud Couairon, and André Mysyrowicz

Phys. Rev. Lett. 110, 097601 (2013)

Published March 1, 2013

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Y. Liu et al., Phys. Rev. Lett. (2013)

Not just a pretty face. This colorful pattern of light scattered from a solid surface being hit with laser pulses can convey details of the surface damage, such as the size of the laser-generated crater.

A spectacular sunburst of colored light produced as a laser beam bores into a solid surface could reveal information about the damage the light causes, according to a report in Physical Review Letters. The authors observed the rainbow pattern as they blasted a series of transparent materials such as glass and quartz with intense laser pulses. The team says that this effect, surprisingly overlooked until now, could offer a way of monitoring laser ablation, a technique used in fields as varied as dental surgery and art preservation.

Catch and Release of Photons

Antoine Browaeys, Laboratoire Charles Fabry, Institut d’Optique, CNRS, Université Paris Sud, 91127 Palaiseau, France

Published March 4, 2013  |  Physics 6, 25 (2013)  |  DOI: 10.1103/Physics.6.25

Two separate groups demonstrate the temporary storage and subsequent release of photons using very different quantum devices.

Catch and Release of Microwave Photon States

Yi Yin, Yu Chen, Daniel Sank, P. J. J. O’Malley, T. C. White, R. Barends, J. Kelly, Erik Lucero, Matteo Mariantoni, A. Megrant, C. Neill, A. Vainsencher, J. Wenner, Alexander N. Korotkov, A. N. Cleland, and John M. Martinis

Phys. Rev. Lett. 110, 107001 (2013)

Published March 4, 2013 | PDF (free)

Storage and Control of Optical Photons Using Rydberg Polaritons

D. Maxwell, D. J. Szwer, D. Paredes-Barato, H. Busche, J. D. Pritchard, A. Gauguet, K. J. Weatherill, M. P. A. Jones, and C. S. Adams

Phys. Rev. Lett. 110, 103001 (2013)

Published March 4, 2013 | PDF (free)

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APS/Antoine Browaeys

Figure 1 In their experiment, Yin et al. tune the energy levels g and e in a superconducting circuit so that the transition frequency ν is resonant with the microwave cavity resonator. The resonator is connected to a transmission line with an adjustable coupling constant κ, which controls the release of microwave photons.

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APS/Antoine Browaeys

Figure 2 In the experiment of Maxwell et al., the interface consists of an atomic cloud of rubidium atoms, whose states have a ladder configuration (shown on the right). The combination of a weak signal laser and control laser excites one atom (shown in red) into a Rydberg state r, while the other atoms remain in the ground state due to Rydberg blockade (see text). The researchers can couple this collective polariton state to another Rydberg state r′ using microwaves (MW).