Alan Nathan

@pobguy

Physics Prof, UIUC; from Maine to Illinois; APS Fellow; ex-nuclear, now baseball physicist; living the dream; proud member, SABR & National Constitution Center

Champaign IL
Vrijeme pridruživanja: lipanj 2009.

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  1. prije 9 sati

    Remembering Buddy Holly today, 61 years after the day the music died.

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  2. 2. velj
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  3. 31. sij
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    I am the Democrat running against Republican Jim Jordan. I can only defeat him with your help. Please retweet and ask others to follow this account to join our campaign and flip this seat once and for all.

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  5. 26. sij

    One more point: Both wood and nonwood bats were used in this experiment. The analysis shows that the BBCOR is the principal feature distinguishing performance among the different bats. This revelation was instrumental in the NCAA deciding to adopt the BBCOR performance metric.

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  6. 26. sij

    (2/2) At sweet spot, COR is largest, then drops off. Note also the spread of values for given impact location, indicating not-squared-up. All data were taken with live pitching in a batting cage, using motion capture to measure bat speed, pitch speed, impact location.

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  7. 26. sij

    Someone asked me recently whether it is possible to determine "quality of contact", given bat speed, pitch speed, and exit velocity. The answer is "yes" and we did this some years ago. See , Fig. 1: COR for ball-bat collision vs. impact location (1/2)

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    25. sij

    Join for from 2:30-5:00 p.m. today at the Haughville Branch of the ! We'll hear from , , and many more great speakers. All baseball fans are welcome:

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    24. sij

    In honor of Hamilton, I offer....

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    22. sij

    If Trump withheld military aid because Ukraine was corrupt (which he never mentioned at the time), then why did he finally give the aid to Ukraine, which had not — and still has not — investigated the Bidens? I thought Trump cared about corruption?

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    17. sij

    OTD in 1945, Raoul Wallenberg, a Swedish diplomat who saved 15,000 Jews in WW2, was kidnapped by the Soviet NKVD who took him to Moscow & later killed him.

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    It was a pleasure having Clay Nunnally from MLB visit USU yesterday and tell us about the Ground Truth Testing program. Thanks for telling our students that MLB needs people who code!

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    The University of Illinois is home to 26 Pulitzer Prize winners, 23 Nobel Laureates, the inventors of YouTube, PayPal and a long list of game-changing innovators. Here are 10 reasons why is the best ➡️

    #14 public university in the nation
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    An astrophotographer has clicked an exceptional video, wherein we can feel the rotation of the earth Using a tracking mount, aligned with North Star, he kept clicking images every 12 seconds for the next 3 hours. The camera is looking at the same portion of the Milky Way Fab!

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  15. 9. sij

    Very big news: RT : The Department of Energy has announced that has been selected to host the Electron-Ion Collider. Here's our coverage of a recent National Academies study on the scientific case for the proposed facility

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  16. 8. sij
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    🏆 Big Ten Coach of the Decade 🏆 x

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    7. sij

    Great introductory lecture from on the physics of ball flight and ball/bat collisions. I remember reading Bob Adair's book in high school and really credit it with my decision to get a degree in engineering. Love this stuff!

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  19. 6. sij

    I gave already contributed to her likely opponent, . And I don't even live in Maine. RT : Please RT if you are done forever with Sen. Susan Collins (R-ME)

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  20. proslijedio/la je Tweet
    6. sij

    What do you think about this ? Classic physics problem?

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