Zobrazeno 1 - 10
of 5 676
pro vyhledávání: '"A. Sparling"'
Autor:
Holland, Jonathan, Sparling, George
This article examines the structure of plane wave spacetimes (of signature $(1,n+1)$, $n\ge 2$) that are homogeneous (the isometry group is transitive) and geodesically complete -- which we call microcosms. In general, a plane wave is shown to determ
Externí odkaz:
http://arxiv.org/abs/2412.10990
Autor:
Holland, Jonathan, Sparling, George
This article describes the symmetries of plane wave spacetimes in dimension four and greater. It begins with a description of the isometric automorphisms, and in particular the homogeneous plane waves. Then the article turns to describing isometries
Externí odkaz:
http://arxiv.org/abs/2405.12748
Autor:
Holland, Jonathan, Sparling, George
This article, the first in a series, analyzes the general theory of plane wave spacetimes. Following Dmitri Aleekseevsky, these are defined as spacetimes admitting a group of dilations leaving invariant a smooth curve. If this curve is specified as p
Externí odkaz:
http://arxiv.org/abs/2402.07036
Autor:
A. Clare Sparling, James M. Ward, Kakali Sarkar, Adam Schiffenbauer, Payam Noroozi Farhadi, Michael A. Smith, Saifur Rahman, Kamelia Zerrouki, Frederick W. Miller, Jian-Liang Li, Kerry A. Casey, Lisa G. Rider
Publikováno v:
Arthritis Research & Therapy, Vol 26, Iss 1, Pp 1-15 (2024)
Abstract Objectives Serum protein abundance was assessed in adult and juvenile dermatomyositis (DM and JDM) patients to determine differentially regulated proteins, altered pathways, and candidate disease activity biomarkers. Methods Serum protein ex
Externí odkaz:
https://doaj.org/article/5ee387052055449bbf31c595ef8f3253
Publikováno v:
Physical Review Letters, Vol. 131, No. 17, p. 171402 (23 October, 2023)
The quest for complete observables in general relativity has been a longstanding open problem. We employ methods from descriptive set theory to show that no complete observable on rich enough collections of spacetimes is Borel definable. In fact, we
Externí odkaz:
http://arxiv.org/abs/2305.04818
Autor:
Dillon E. King, A. Clare Sparling, Abigail S. Joyce, Ian T. Ryde, Beverly DeSouza, P. Lee Ferguson, Susan K. Murphy, Joel N. Meyer
Publikováno v:
BMC Ecology and Evolution, Vol 24, Iss 1, Pp 1-12 (2024)
Abstract Background Sex differences in mitochondrial function have been reported in multiple tissue and cell types. Additionally, sex-variable responses to stressors including environmental pollutants and drugs that cause mitochondrial toxicity have
Externí odkaz:
https://doaj.org/article/f4ba1cd2735f4007ba275730aea0b3c2
Autor:
Adhm Zahran, Sarah S. Dermody, Graham W. Berlin, Paolo A. Palma, Shayna Skakoon-Sparling, Syed W. Noor, Nathan J. Lachowsky, Daniel Grace, Joseph Cox, David M. Moore, Gilles Lambert, Terri H. Zhang, Milada Dvorakova, Jody Jollimore, Allan Lal, Trevor A. Hart
Publikováno v:
Substance Abuse Treatment, Prevention, and Policy, Vol 19, Iss 1, Pp 1-12 (2024)
Abstract Background Gay, bisexual, and other men who have sex with men (GBM) report high rates of problematic alcohol use, anxiety, and depression. This may, in part, be due to stressors related to their sexual identity (i.e., minority stressors). Ho
Externí odkaz:
https://doaj.org/article/2feab9ca897c4ce5ba9551d94f62e651
Autor:
Sparling, Thalia Morrow, Offner, Claudia, Deeney, Megan, Denton, Philippa, Bash, Kristin, Juel, Rachel, Moore, Susan, Kadiyala, Suneetha
Publikováno v:
In Advances in Nutrition September 2024 15(9)
Commercial powder bed fusion additive manufacturing systems use recoaters for the layer-by-layer distribution of powder. Despite the known limitations of recoaters, there has been relatively little work presented on the possible benefits of alternati
Externí odkaz:
http://arxiv.org/abs/2105.06538
Autor:
Molway, Michael J., Bales-Shaffer, Liana, Ranta, Kaili, Basler, Dustin, Murphy, Megan, Kidd, Bryce E., Gafar, Abdulbasit Tobi, Porter, Justin, Albin, Kierstyn, Goodson, Boyd M., Chekmenev, Eduard Y., Rosen, Matthew S., Snow, W. Michael, Ball, James, Sparling, Eleanor, Prince, Mia, Cocking, Daniel, Barlow, Michael J.
We report on hyperpolarization of quadrupolar (I=3/2) 131Xe via spin-exchange optical pumping. Observations of the 131Xe polarization dynamics show that the effective alkali-metal/131Xe spin-exchange cross-sections are large enough to compete with 13
Externí odkaz:
http://arxiv.org/abs/2105.03076