About Me
- Dev Lulla
- Hi I am a teacher and counselor by profession. I teach the subject of mathematics though I actually teach "students". I enjoy reading Motivational books. I dabble with painting and sketching. I love singing and enjoy playing musical instruments. I Like listening to music. I enjoy dancing. I am fond of tasting different types of cuisine. In short.. I love Myself !!!
Thursday, June 10, 2010
Sunday, June 6, 2010
Cinnamon and Honey - Wonders for Good Health !!!
|
Thursday, June 3, 2010
Thursday, May 6, 2010
Whats an SDO, Whats a Sundog ??? Read this interesting story !!!
http://science.nasa.gov/media/medialibrary/2010/02/18/18feb_coolmovie_resources/anna-herbst1.mov
February 18, 2010: Last week, on Feb. 11th, the Solar Dynamics Observatory (SDO) lifted off from Cape Canaveral on a five-year mission to study the sun. Researchers have called the advanced spacecraft the "crown jewel" of NASA's heliophysics fleet. SDO will beam back IMAX-quality images of solar explosions and peer beneath the stellar surface to see the sun's magnetic dynamo in action.
SDO is designed to amaze—and it got off to a good start.
"The observatory did something amazing before it even left the atmosphere," says SDO project scientist Dean Pesnell of the Goddard Space Flight Center.
Moments after launch, SDO's Atlas V rocket flew past a sundog hanging suspended in the blue Florida sky and, with a rippling flurry of shock waves, destroyed it. Click on the image below to launch a video recorded by 13-year-old Anna Herbst at NASA's Banana River viewing site—and don't forget to turn up the volume to hear the reaction of the crowd.
"I couldn't believe my eyes," says Anna. "The shock waves were so cool." Anna traveled with classmate Amelia Phillips three thousand miles from Bishop, California, to witness the launch. "I'm so glad we came," says Amelia. "I've never seen anything like it!"
Sundogs are formed by plate-shaped ice crystals in high, cold cirrus clouds. As the crystals drift down from the sky like leaves fluttering from trees, aerodynamic forces tend to align their broad faces parallel to the ground. When sunlight hits a patch of well-aligned crystals at just the right distance from the sun, voila!--a sundog.
"When the Atlas V rocket penetrated the cirrus, shock waves rippled through the cloud and destroyed the alignment of the crystals," explains atmospheric optics expert Les Cowley. "This extinguished the sundog."
In the past, says Cowley, there have been anecdotal reports of atmospheric disturbances destroying sundogs—for instance, "gunfire and meteor shock waves have been invoked to explain their disruption. But this is the first video I know of that shows the effect in action."
The effect on the crowd was electric.
"When the sundog disappeared, we started screaming and jumping up and down," says Pesnell. "SDO hit a home run: Perfect launch, rippling waves, and a disappearing sundog. You couldn't ask for a better start for a mission."
SDO is now in orbit. "The observatory is doing great as the post-launch checkout continues," he reports. "We'll spend much of the first month moving into our final orbit and then we'll turn on the instruments. The first jaw-dropping images should be available sometime in April."
Believe it or not, Pesnell says, the best is yet to come. Author: Dr. Tony Phillips | Credit: Science@NASA
Wednesday, April 28, 2010
What are Taxi Cab Numbers ?
A common anecdote about Ramanujan relates to the number 1729. Hardy arrived at Ramanujan's residence in a cab numbered 1729. Hardy did not think highly of Ramanujan's interest in recreational mathematics, and so commented that the number 1729 seemed to be uninteresting. Ramanujan is said to have stated on the spot that it was actually a very interesting number mathematically, being the smallest number representable in two different ways as a sum of two cubes:
In mathematics, the nth taxicab number, typically denoted Ta(n) or Taxicab(n), is defined as the smallest number that can be expressed as a sum of two positive cubes in n distinct ways, up to order of summands.
G. H. Hardy and E. M. Wright proved in 1954 that such numbers exist for all positive integers n, and their proof is easily converted into a program to generate such numbers.
However, the proof makes no claims at all about whether the thus-generated numbers are the smallest possible and is thus useless in finding Ta(n).
So far, the following six taxicab numbers are known:
Saturday, April 10, 2010
One Day in Space - You better believe it !
NASA Atlantis & Others
Here are some stunning new NASA pictures, plus a few photos from a Russian source, you can get a closer look at science and maintenance work in orbit, including several fascinating spacewalks.
STS-117 Atlantis mission's rendezvous with Expedition 15 of the International Space Station.

Astronaut Steven Swanson during the mission's second spacewalk.


Inspection of the thermal shield.



Shuttle's payload bay is clearly visible, with a valuable cargo inside.

Shuttle approaching the International Space Station


"The Backflip" - flipping Atlantis on her "belly" to allow for closer examination of the heat shield.




Giving out packages from Earth...

Astronaut Jim Reilly during spacewalk.



Astronaut Steven Swanson during the mission's second spacewalk.
Inspection of the thermal shield.
Shuttle's payload bay is clearly visible, with a valuable cargo inside.
Shuttle approaching the International Space Station
"The Backflip" - flipping Atlantis on her "belly" to allow for closer examination of the heat shield.
Giving out packages from Earth...
Astronaut Jim Reilly during spacewalk.
Mission's first spacewalk (connecting station's newly installed truss)
Construction of the International Space Station continues - activating new truss segments.
Folding the older solar arrays...
Astronaut Patrick Forrester during the mission's fourth spacewalk.
New solar array configuration. Future missions will add more arrays to each side and several science modules.
Aurora Borealis as seen from space:
(Image courtesy of the Image Science & Analysis Laboratory, NASA)
Sunset over the Pacific:
(Image courtesy of the Image Science & Analysis Laboratory, NASA)
Subscribe to:
Posts (Atom)