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Saturday 29 November 2014

Scientist of The Day

William Hopkins


The field of geology is studded with some notable names and one name in particular that deserves a lot of honor and praise is that of William Hopkins. He is mathematician and a geologist from England who is quite well-known for his contributions to the field of geology and for his private tutor role to Cambridge undergraduates who aspired to be mathematicians. It was this private tutor role that earned him the nickname the “Senior-wrangler maker”.

William Hopkins also made a lot of studies that were centered in letting it be known that Earth’s interior is solid and not a liquid. It was because of this model that he was able to explain quite a number of geological phenomena. Despite the fact that his conclusion about the solid interior was correct, his physical and mathematical reasoning were deemed unsound.


His early life

Hopkins was born in February 2, 1793 at Kingston-on-soar which is found in Nottinghamshire. He was the only son born to William Hopkins who was a farmer. He wasn’t a farmer really because he was more of a gentleman farmer and this meant he didn’t so much work the land with his own hands but rather he owned the farms and made money from them. During his early years, he was in Norfolk where he learned the more practical agricultural basics then his father rented a modest-sized farm for him in Suffolk at Bury St Edmunds. He wasn’t very successful at farming and as a farmer so when his first wife died around the year 1821, he grabbed the chance to mitigate whatever losses he had incurred and enroll in St. Peter’s college at the University of Cambridge to study for a B.A. degree in 1827 and was a second wrangler. He obtained his Master’s Degree in 1930.

Wrangler-maker


Before graduating from St. Peter’s college, Hopkins got married to Caroline Frances Boys and this made him ineligible for fellowship from the school. In order for him to make money he became a private tutor to budding mathematicians who were after the Senior Wrangler title which just so happened to be a very prestigious distinction back then. He may have been a failure at farming but he was quite successful as a tutor and earned around £700-£800 per year. By the time 1849 rolled in, he had already tutored around 200 wranglers of which 17 became senior wranglers. Some famous students of his were G.G. Stokes and Arthur Cayley. He also had the honor of being a tutor to Lord Kelvin, Isaac Todhunter, and James Clerk Maxwell. Francis Galton had nothing but praise for William Hopkins’ style of teaching which was informative and entertaining which explained why it was so effective.

William Hopkins was also the coach to Edward Routh who nabbed the prestigious a Senior Wrangler title and also turned into “wrangler-maker”. In the year 1833, Hopkins came out with this Elements of Trigonometry and was then recognized for his prowess as a mathematician.

Geology


Somewhere in the year 1833, William Hopkins met a man named Adam Sedgwick while he was at Barmouth and thus was able to join in several expeditions and this was when he developed a keen interest in geology and the structure of the earth. From that time on, he began to publish papers in the Cambridge Philosophical Society and the Geological Society of London where he talked about the physical geology as a discipline and helped define it. He even made mathematical studies on the effects of an elevator force that was moving below the crust of the earth, would have on the surface of the Earth in the form of faults and fissures. It was through this that he managed to talk about the denudation and elevation of the Waldean area, the Lake District, and Bas Boulonnais.

He had this idea that the Earth was solid but was never fully at rest and was in fact, dynamic and had cavities that contained extremely hot fluids and vapors that could create a local elevator pressure. William Hopkins’ model of the Earth wasn’t quite in sync with scientific theories of Charles Lyell who believed that the Earth was in a “steady state”. Charles Lyell believed that the Earth and a solid crust but was liquid on the inside.

For his part, William Hopkins submitted papers to the Royal Society between the years 1838 and 1842 and these papers talked about the rotation of the Earth and its nutation and precession as well. He used his observations to prove that his theory about what the interior of the Earth was made of and that it was not fluid like Charles Lyell believed. He didn’t stop there though because he also studied volcanoes and Earthquakes by way of the same theory or so it was stated in a report submitted to the British Association in 1847.

Hopkins worked hard figure out what enormous amounts of pressure did to the melting points and the thermal conductivity on a number of substances and with support of the Royal Society in form of a grant, he was able to recruit William Fairbairn and James Prescott Joule to help in the collecting of measurements which he used to support his theory. Hopkins also asserted that even though the Earth was cooling, this really had no effect on the climate.

It was mentioned that while his theory of the Earth’s structure was spot on, Thomson tactfully pointed out that Hopkins’ physical reasoning and his mathematical equations were all wrong.

Glaciology


He made some studies on the movement of glaciers but in doing so, he crossed J.D. Forbes. J.D. believed the subject of glaciers was his specialty and he was not at all impressed and was even contemptuous of Hopkins and believed he was inexperienced in the field.

Personal life


He married his second wife and they had a son and three daughters- one of who was Ellice Hopkins that became the morality campaigner. Hopkins was a smart man who enjoyed landscape painting, music, and poetry so it was too bad that his final years were spent inside a lunatic asylum where he died of exhaustion and chronic mania. Indeed, it was rather a sad end to such an illustrious life.

Friday 28 November 2014

Kalpana Chawla (March 17, 1962 – February 1, 2003) was born in Karnal, India. She was the first Indian-American astronaut] and first Indian woman in space. She first flew on Space Shuttle Columbia in 1997 as a mission specialist and primary robotic arm operator. In 2003, Chawla was one of the seven crew members killed in the Space Shuttle Columbia disaster.

Early life

Kalpana Chawla was born in Karnal, India. She completed her earlier schooling at Tagore Baal Niketan Senior Secondary School, Karnal and completed her Bachelor of Engineering degree in Aeronautical Engineering at Punjab Engineering College at Chandigarh in 1982. She moved to the United States in 1982 where she obtained a Master of Science degree in aerospace engineering from the University of Texas at Arlington in 1984. Determined to become an astronaut even in the face of the Challenger disaster, Chawla went on to earn a second Masters in 1986 and a PhD in aerospace engineering in 1988 from the University of Colorado at Boulder.

Career

In 1988, she began working at the NASA Ames Research Center as Vice President of Overset Methods, Inc. where she did Computational fluid dynamics (CFD) research on Vertical/Short Takeoff and Landing concepts. Chawla held a Certificated Flight Instructor rating for airplanes, gliders and Commercial Pilot licenses for single and multi-engine airplanes, seaplanes and gliders.
Becoming a naturalized U.S. citizen in April 1991, Chawla applied for the NASA Astronaut Corps. She joined the Corps in March 1995 and was selected for her first flight in 1996. She spoke the following words while traveling in the weightlessness of space, "You are just your intelligence". She had traveled 10.67 million km, as many as 252 times around the Earth.
Her first space mission began on November 19, 1997, as part of the six-astronaut crew that flew the Space Shuttle Columbia flight STS-87. Chawla was the first Indian-born woman and the second Indian person to fly in space, following cosmonaut Rakesh Sharma who flew in 1984 on the Soyuz T-11. On her first mission, Chawla traveled over 10.4 million miles in 252 orbits of the earth, logging more than 372 hours in space.]During STS-87, she was responsible for deploying the Spartan Satellite which malfunctioned, necessitating a spacewalk by Winston Scott and Takao Doi to capture the satellite. A five-month NASA investigation fully exonerated Chawla by identifying errors in software interfaces and the defined procedures of flight crew and ground control.
After the completion of STS-87 post-flight activities, Chawla was assigned to technical positions in the astronaut office to work on the space station, her performance in which was recognized with a special award from her peers.
Chawla in the space shuttle simulator
In 2000 she was selected for her second flight as part of the crew of STS-107. This mission was repeatedly delayed due to scheduling conflicts and technical problems such as the July 2002 discovery of cracks in the shuttle engine flow liners. On January 16, 2003, Chawla finally returned to space aboard Columbia on the ill-fated STS-107 mission. Chawla's responsibilities included the microgravity experiments, for which the crew conducted nearly 80 experiments studying earth and space science, advanced technology development, and astronaut health and safety.

Death

Chawla died in the Space Shuttle Columbia disaster which occurred on February 1, 2003, when the Space Shuttle disintegrated over Texas during re-entry into the Earth's atmosphere, with the loss of all seven crew members, shortly before it was scheduled to conclude its 28th mission, STS-107.

Awards

Posthumously awarded: