Zobrazeno 1 - 10
of 3 900
pro vyhledávání: '"A. Easson"'
It is commonly assumed that low-mass primordial black holes cannot constitute a significant fraction of the dark matter in our universe due to their predicted short lifetimes from the conventional Hawking radiation and evaporation process. Assuming p
Externí odkaz:
http://arxiv.org/abs/2410.21577
We consider the possibility of a past and future eternal universe, constructing geodesically complete inflating, loitering, and bouncing spacetimes. We identify the constraints energy conditions in General Relativity place on the building of eternal
Externí odkaz:
http://arxiv.org/abs/2404.03016
We construct geodesically complete inflationary models, addressing and overcoming existing no-go theorems related to past eternal inflation. We show that a period of accelerated expansion is indispensable for achieving nontrivial, geodesically comple
Externí odkaz:
http://arxiv.org/abs/2402.13031
Autor:
Easson, Damien A., Pezzelle, Max W.
We prove there is a unique vacuum solution in split-signature spacetimes with Kleinian SO(2,1) spherical symmetry. We extend our analysis to accommodate a positive or negative cosmological constant and we prove the Kleinian spherically symmetric solu
Externí odkaz:
http://arxiv.org/abs/2312.00879
Publikováno v:
J. High Energ. Phys. 2023, 162 (2023)
In the standard derivation of the Kerr-Schild double copy, the geodicity of the Kerr-Schild vector and the stationarity of the spacetime are presented as assumptions that are necessary for the single copy to satisfy Maxwell's equations. However, it i
Externí odkaz:
http://arxiv.org/abs/2306.13687
Autor:
Sunghyun Nam, Michael W. Easson, Jacobs H. Jordan, Zhongqi He, Isabel M. Lima, Matthew B. Hillyer, Nicholas E. Ernst, David Fang, Md Muhaiminul Islam
Publikováno v:
ACS Omega, Vol 9, Iss 36, Pp 38195-38204 (2024)
Externí odkaz:
https://doaj.org/article/ee07aae832884d5a924f294dc2052500
Autor:
Christopher Gibson, Shirley C. Wang, Arcturus Phoon, Nayana Thalanki Anantha, Kathryn Ottolino-Perry, Stephen Petropoulos, Zuha Qureshi, Vasanth Subramanian, Anam Shahid, Cristiana O’Brien, Steven Carcone, Suzanne Chung, Teresa Tsui, Viktor Son, Mayleen Sukhram, Fannong Meng, Susan J. Done, Alexandra M. Easson, Tulin Cil, Michael Reedijk, Wey L. Leong, Ralph S. DaCosta
Publikováno v:
BMC Biomedical Engineering, Vol 6, Iss 1, Pp 1-20 (2024)
Abstract Background Visualization of cancer during breast conserving surgery (BCS) remains challenging; the BCS reoperation rate is reported to be 20-70% of patients. An urgent clinical need exists for real-time intraoperative visualization of breast
Externí odkaz:
https://doaj.org/article/bcd3fc8fc51b4245b07597090995945f
Autor:
Cai, Yi-Fu, Tang, Chengfeng, Mo, Geyu, Yan, Sheng-Feng, Chen, Chao, Ma, Xiao-Han, Wang, Bo, Luo, Wentao, Easson, Damien, Marciano, Antonino
We discuss a novel window to probe the origin of our universe via the mass functions of primordial black holes (PBHs). The mass functions of PBHs are simply estimated using the conventional Press-Schechter formalism for two paradigms of cosmic origin
Externí odkaz:
http://arxiv.org/abs/2301.09403
The Weyl double copy relates vacuum solutions in general relativity to Abelian gauge fields in Minkowski spacetime. In a previous work, we showed how the Weyl double copy can be extended to provide a treatment of external gravitational sources consis
Externí odkaz:
http://arxiv.org/abs/2210.16339
Autor:
James S. Khan, Ian Gilron, P. J. Devereaux, Hance Clarke, Nour Ayach, George Tomlinson, May Lynn Quan, Karim S. Ladha, Stephen Choi, Allana Munro, Richard Brull, David W. Lim, Sinziana Avramescu, Philippe Richebé, Nicole Hodgson, James Paul, Daniel I. McIsaac, Simone Derzi, Geoff L. Zbitnew, Alexandra M. Easson, Naveed T. Siddiqui, Sarah J. Miles, Keyvan Karkouti, PLAN Trial Investigators
Publikováno v:
Trials, Vol 25, Iss 1, Pp 1-13 (2024)
Abstract Background Persistent pain is a common yet debilitating complication after breast cancer surgery. Given the pervasive effects of this pain disorder on the patient and healthcare system, post-mastectomy pain syndrome (PMPS) is becoming a larg
Externí odkaz:
https://doaj.org/article/9f9c885049044ef186ed013f85f2ae27