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Pallab Saha
Works at would be Chemist.
Attends Shahjalal University of Science and Technology
Lives in Bangladesh
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A very lonely bird... Looking for...
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 I like google plus for it`s photography availability...
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Size comparison of Earth and Mars.

http://en.wikipedia.org
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Spacecraft Computer Issue Resolved

Mars Science Laboratory Mission Status Report

Engineers have found the root cause of a computer reset that occurred two months ago on NASA's Mars Science Laboratory and have determined how to correct it.

The fix involves changing how certain unused data-holding locations, called registers, are configured in the memory management of the type of computer chip used on the spacecraft. Billions of runs on a test computer with the modified register configuration yielded no repeat of the reset behavior. The mission team made this software change on the spacecraft's computer last week and confirmed this week that the update is successful.

The reset occurred Nov. 29, 2011, three days after launch, during use of the craft's star scanner. The cause has been identified as a previously unknown design idiosyncrasy in the memory management unit of the Mars Science Laboratory computer processor. In rare sets of circumstances unique to how this mission uses the processor, cache access errors could occur, resulting in instructions not being executed properly. This is what happened on the spacecraft on Nov. 29.

"Good detective work on understanding why the reset occurred has yielded a way to prevent it from occurring again," said Mars Science Laboratory Deputy Project Manager Richard Cook of NASA's Jet Propulsion Laboratory, Pasadena, Calif. "The successful resolution of this problem was the outcome of productive teamwork by engineers at the computer manufacturer and JPL."

The Mars-bound spacecraft performed a brief alignment activity using its star scanner and sun sensor on Jan. 26. During the alignment observations, the star scanner detected Mars.

"Our target is in view," said JPL's Steve Collins, attitude control subsystem engineer for Mars Science Laboratory's cruise from Earth to Mars.

The spacecraft began normal use of its star tracker and true celestial navigation this week after its software update.

The Mars Science Laboratory mission will use its car-size rover, Curiosity, to investigate whether the selected region on Mars inside Gale Crater has offered environmental conditions favorable for supporting microbial life and favorable for preserving clues about whether life existed. Curiosity will land on Mars on Aug. 6, 2012, Universal Time and Eastern Daylight Time (evening of Aug. 5, Pacific Daylight Time).

The spacecraft's cruise-stage solar array is producing 704 watts. The telecommunications rates are 1 kilobit per second for uplink and 800 bits per second for downlink. The spacecraft is spinning at 1.97 rotations per minute.

As of 9 a.m. PST (noon EST, or 1700 Universal Time) on Friday, Feb. 10, the spacecraft will have traveled 127 million miles (205 million kilometers) of its 352-million-mile (567-million-kilometer) flight to Mars. It will be moving at about 17,800 miles per hour (28,600 kilometers per hour) relative to Earth and at about 63,700 mph (102,500 kilometers per hour) relative to the sun.

JPL, a division of the California Institute of Technology in Pasadena, manages the Mars Science Laboratory mission for the NASA Science Mission Directorate, Washington.

Image Credit: NASA/JPL-Caltech
Explanation of the image from: http://www.nasa.gov/mission_pages/msl/news/msl20120209.html
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Bali's Beautiful Hindu Culture

A Balinese man kicks up fire during the "Perang Api" ritual ahead of Nyepi day, which falls on Tuesday in Gianyar on the Indonesian island of Bali March 11, 2013.

Nyepi is a day of silence for self-reflection to celebrate the Balinese Hindu new year, where Hindus in Bali observe meditation and fasting, but are not allowed to work, cook, light lamps or conduct any other activities.

Picture taken on March 11, 2013 / Credit: Reuters
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M. C. Escher made with +LEGO

Amazing tribute to M. C. Escher made of Lego, really impressive! Via http://flic.kr/p/n5AnD
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our camera... :)))))))))))))
Canon SX30IS 14.1MP Digital Camera with 35x Wide Angle Optical Image Stabilized Zoom and 2.7 Inch Wide LCD
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Dark Sand Cascades on Mars

They might look like trees on Mars, but they're not. Groups of dark brown streaks have been photographed by the Mars Reconnaissance Orbiter on melting pinkish sand dunes covered with light frost. This image was taken in 2008 April near the North Pole of Mars. At that time, dark sand on the interior of Martian sand dunes became more and more visible as the spring Sun melted the lighter carbon dioxide ice. When occurring near the top of a dune, dark sand may cascade down the dune leaving dark surface streaks -- streaks that might appear at first to be trees standing in front of the lighter regions, but cast no shadows. Objects about 25 centimeters across are resolved on this image spanning about one kilometer. Close ups of some parts of this image show billowing plumes indicating that the sand slides were occurring even when the image was being taken.

Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA
Explanation of the image from: http://apod.nasa.gov/apod/ap100119.html
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Work
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Student
Employment
  • would be Chemist.
    present
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Currently
Bangladesh
Previously
Sylhet
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Introduction
I am a simple human being trying to be a good chemist. Photography is one of my hobby.
Education
  • Shahjalal University of Science and Technology
    Chemistry, present
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Male
Birthday
January 17
Relationship
Single