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Articles by A. Powell
Four ppm measurement of the antihydrogen ground-state hyperfine splitting
Abstract The hydrogen atom is a touchstone for the foundations, evolution and frontiers of quantum theory1,2,3,4,5,6,7,8,9. Key spectral lines of this atom have been determined to remarkable precision10,11. Our research focuses on the study of antihydrogen, the antimatter counterpart of hydrogen. We test fundamental symmetries of nature (such as simultaneous charge conjugation, parity inversion, and time reversal or CPT symmetry) through precision comparisons of these atomic systems12.
Be+ assisted, simultaneous confinement of more than 15000 antihydrogen atoms - Nature Communications
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Abstract Antihydrogen, the bound state of a positron and an antiproton, is the only pure anti-atomic system ever studied. It is produced exclusively in the laboratory, as it has never been observed in nature. This unique system is of great interest for searching for tentative differences between matter and antimatter.
By C. Baker, N. Bhatt, G. Bonomi, A. Capra, I. Carli, C. L. Cesar, M. B. Charlton, A. Cridland Mathad, D. Duque Quiceno, J. Fajans, L. Golino, J. S. Hangst, D. Hodgkinson, S. A. Jones, S. Jonsell, N. M. Madsen, J. Nauta, A. Oliveira, J. Peszka, A. Powell, C. Rasmussen, F. Robicheaux, J. Schoonwater, J. D. Singh, G. R. Smith, S. Stracka, J. Suh, E. Thorpe-Woods, M. Urioni, T. Momose, T. Robertson-Brown, R. I. Thompson, P. Woosaree
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Nature
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Family & kids event this week in Northeast Florida: Sept. 7-13
Thank you for signing up for NE Florida News Alerts! Please select the organization you wish to subscribe to. We will email you whenever we publish an article about this organization. You may update or cancel your subscription at any time. Yulee Branch Library You must select at least one organization By signing up for alerts, you agree to the privacy policy & terms of service.
Family & kids event this week in Northeast Florida: Aug. 10-16
Julie Cannavino, Library Director of Nassau County Public Library | Nassau County Public Library website Julie Cannavino, Library Director of Nassau County Public Library | Nassau County Public Library website The following family & kids event is scheduled to take place in Northeast Florida this week. Tuesday, Aug. 12 Event: Yulee Knitting Club Yulee Branch Library 1-2 pm RECEIVE ALERTS The next time we write about any of these orgs, we’ll email you a link to the story.
BIDEN DOJ'S LAWFARE CAMPAIGN PERSISTS AGAINST MAGA RISING STAR CAROLINA AMESTY
Former Florida State Representative Carolina Amesty has become a high-profile target of political persecution by the Biden Administration’s Department of Justice — a chilling example of federal power weaponized against an outspoken Latina pro-MAGA voice. Amesty, a conservative firebrand winning her seat during the difficult 2022 midterm elections, quickly became a leading voice against human trafficking in the Florida state house, championing the cause of helping victims in the legislature.
Precision spectroscopy of the hyperfine components of the 1S–2S transition in antihydrogen - Nature Physics
Abstract The antimatter equivalent of atomic hydrogen—antihydrogen—is an outstanding testbed for precision studies of matter–antimatter symmetry. Here we report on the simultaneous observation of both accessible hyperfine components of the 1S–2S transition in trapped antihydrogen.
Columbus Crew comeback earns MLS Cup final clash with LAFC
LAFC beat Houston Dynamo 2-0 thanks to a first-half Ryan Hollingshead goal and an 80th minute own goal from Houston Dynamo defender Franco Escobar. Home side Cincinnati scored twice in the first half of the Ohio derby, with goals from Brandon Vazquez and Luciano Acosta and they held that lead until 15 minutes from the end of regulation. But an own goal from Alvas Powell and then a Diego Rossi goal in the 86th minute, forced the game into extra-time and Columbus utterly dominated from then on.
Observation of the effect of gravity on the motion of antimatter - Nature
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Abstract Einstein’s general theory of relativity from 19151 remains the most successful description of gravitation. From the 1919 solar eclipse2 to the observation of gravitational waves3, the theory has passed many crucial experimental tests. However, the evolving concepts of dark matter and dark energy illustrate that there is much to be learned about the gravitating content of the universe.
By N. Bhatt, A. Capra, J. Fajans, L. Golino, S. A. Jones, S. Jonsell, N. M. Madsen, L. Martín, A. Oliveira, A. Powell, C. Rasmussen, F. Robicheaux, J. A. Singh, G. R. Smith, I. Carli, C. L. Cesar, A. Cridland Mathad, D. Duque Quiceno, P. Grandemange, P. Granum, J. S. Hangst, D. Hodgkinson, A. Khramov, J. Peszka, M. Sameed, J. Schoonwater, S. Stracka, G. Stutter, E. Thorpe-Woods, M. Urioni
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Nature
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Michael Statham, 2020 Offensive tackle
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Abstract No. 572 Improving the interventional radiology lab ergonomics using a novel imaging system geometry for image-guided procedures
To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. The interventional radiology (IR) lab work environment poses specific challenges in terms of comfort and safety for operators and patients. Table movements required for imaging and lack of system positioning flexibility are suspected to contribute to these challenges.
Physical prognostic factors predicting outcome following lumbar discectomy surgery: systematic review and narrative synthesis
To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. Purpose: Success rates for lumbar discectomy are estimated as 78-95% patients at 1-2 years post-surgery, supporting its effectiveness. However, ongoing pain and disability is an issue for some patients, and recurrence contributing to reoperation is reported.
White Racial Identity, Racial Mixture, and the “One Drop Rule”
White Racial Identity, Racial Mixture, and the "One Drop Rule" by A.D. PowellSeptember-November 2004 writer for Interracial Voice Presented at Fifth Union, June 18, 2004 In the days of the Third Reich, the Nazis imposed the "Nuremberg Laws"on German citizens. Assimilated German Jews were told that they were not German. It didn't matter that their language, culture and self-image were all proudly German.
Operationalizing and Examining Family Planning Vigilance in Adult Women With Type 1 Diabetes
Operationalizing and Examining Family Planning Vigilance in Adult Women With Type 1 Diabetes Susan M. Sereika, Dorothy Becker, Patricia Schmitt, A. Blair Powell, Ana Maria Diaz, Andrea F.R. Fischl, Jennifer Thurheimer-Cacciotti, William H. Herman, Denise Charron-Prochownik Diabetes Care Dec 2016, 39 (12) 2197-2203; DOI: 10.2337/dc16-1648
White Racial Identity, Racial Mixture, and the “One Drop Rule”
White Racial Identity, Racial Mixture, and the "One Drop Rule" by A.D. PowellSeptember-November 2004 writer for Interracial Voice Presented at Fifth Union, June 18, 2004 In the days of the Third Reich, the Nazis imposed the "Nuremberg Laws"on German citizens. Assimilated German Jews were told that they were not German. It didn't matter that their language, culture and self-image were all proudly German.
The "Dark Side Of The Moon" Cover Designer On The Making Of Iconic Rock Album Art
From 1972 to 1986, London-based photography and design studio Hipgnosis—made up of Aubrey "Po" Powell, Storm Thorgerson, and Peter Christopherson—created some of the most recognizable album covers in rock music history. Their rainbow-through-a-prism graphic for Pink Floyd’s "The Dark Side of the Moon" became a logo of sorts for prog-heads, plastered on the T-shirts of Syd Barrett-worshipping teenagers to this day.
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