Jewett’s personal cue stick is one of the first whose shaft is made of strong, light carbon fiber, greatly reducing squirt. The cue stick’s mass near the tip is decisive. Squirt results from conservation of momentum. Jewett and his associates, using slow-motion videos, found that as the cue ball starts its spin, the stick is pushed to the side its momentum is balanced by the equal and opposite momentum of the cue ball itself. To apply spin, a cue stick’s tip strikes the cue ball off center hit on one side, the ball travels toward the opposite side, at an often unpredictable angle that can cause a miss. Years later, he and a group of colleagues became the first to understand the physics of “squirt,” or cue-ball deflection. In the spirit of Coriolis, Jewett also pursued unexplained phenomena of billiards. “Coriolis figured out a lot of things that people are just now discovering, or haven’t discovered yet,” he says. In the book’s meticulous diagrams, Jewett saw that his sense of pool shots as physics experiments had borne fruit more than a century earlier. His Mathematical Theory of Effects in the Game of Billiards was also about spin: it detailed the behavior of spinning billiard balls. Published in 1835, it shows the speed of the cue ball when hit at various heights. It was in 1972 that Jewett came across a little-known book by the 19th-century French physicist Gaspard-Gustave Coriolis, best remembered for analyzing such effects as the opposite spins of hurricanes in the Northern and Southern Hemispheres. Jewett built a distinguished career at HP and its descendants, Agilent Technologies and Keysight Technologies, was awarded five patents in the area of signal generation and analysis and retired in 2015.Įver since starting over as a Berkeley undergraduate, however, Jewett had been pursuing a parallel career.Ī diagram from Gaspard-Gustave Coriolis’s book. He developed expertise in new fields like data converters based on Josephson junctions, inspired by his studies in superconductivity. Bachelor’s degree in hand, he went to work for Hewlett-Packard.īefore long the company had him back at Berkeley, this time underwriting his graduate work. After completing his service, he returned to Berkeley and majored in electrical engineering. He was sent to school to learn electronics and later stationed in Vietnam, although, he says, “it wasn’t Full Metal Jacket.” Compared to combat zones, the base where he worked with radar weather equipment was a resort, complete with a pool hall, where he became an expert player. He spent so much time at the Student Union’s 17 billiards tables that he flunked out.īob Jewett (photo by Jim Block)Jewett then joined the U.S. When Jewett entered Berkeley as a math major, what began as synchronicity turned into conflict. Then a friend got a pool table for his birthday and invited him to play pool was love at first sight. ’79 EECS) was “one of those nerdy kids who was the lab assistant to the physics class,” he says. If you suspect someone is using official "UC Staff" flair and posing as a fake staff member, message the mods and we will remove it.As a high school junior in the 1960s, Bob Jewett (B.S. Any inappropriate flair will be removed and repeat offenders banned permanently. To assign your own flair, click the "edit" button next to your name on the right-hand bar. We'll remove any threads that violate this rule (since titles can't be edited after submission), and repeat offenders may be banned. Moderators make the final call as to where the dividing line is - so be nice.Īll news articles, or articles of any kind, must be submitted with the same title as the title of the article being linked. However, any trolling that qualifies as excessive, confrontational, or aggressive is not allowed. Trolling itself is not against the rules. Exceptions may be allowed with moderator approval. Examples of an advertisement or promotion may include: job openings, housing requests, apps, websites, surveys, and/or campaigns. You may not advertise or promote any product or service of absolutely any kind in this subreddit. This rule only applies to people or groups who are not public entities. Examples of a reputable source may include: the University, a reputable paper or journal, or a government source. Qualifying sources are left entirely to Moderator discretion. You may post names and/or pictures so long as the original source of this information is reputable. Do not post something that could be construed as organizing a movement or negative response against an individual or group. This is also a site-wide rule, but it bears repeating. Welcome! Official /r/berkeley Discord Subreddit FiltersĬS/EECS posts only No-CS/EECS posts Politics posts only No politics posts University posts only Local posts only Events and organization posts only The Rules A subreddit for the community of UC Berkeley as well as the surrounding City of Berkeley, California.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |