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Results: 852
Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Abstract: The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In this paper, we use QPOs within...
Hidden Spectral Symmetries and Mode Stability of Subextremal Kerr(-de Sitter) Black Holes
Abstract: We uncover hidden spectral symmetries of the Teukolsky equation in Kerr(-de Sitter) black holes, recently conjectured by Aminov, Grassi and Hatsuda (Ann. Henri Poincaré 23, 1951-1977, 2022, and Gen. Relativ. Grav....
Raman solitons in waveguides with simultaneous quadratic and Kerr nonlinearities
We analyze Raman-induced self-frequency shift in two-component solitons supported by both quadratic and cubic nonlinearities. Treating Raman terms as a perturbation, we derive expressions for soliton velocity and frequency...
Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Abstract: The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In this paper, we use QPOs within...
Threshold of complexity and Arnold tongues in Kerr-ring microresonators
We show that the threshold condition for two pump photons to convert into a pair of the sideband ones in Kerr microresonators with high-quality factors breaks the pump laser parameter space into a sequence of narrow in frequency...
Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Abstract The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In...
Ursinus Magazine, Summer 1969
Henry R. Taylor, Milton E. Detterline, Lucille Hunt Bone, Adele Boyd, Raymond V. Gurzynski, Richard P. Richter, Clark Kerr, Richard Winchester, Ted Taylor, Donald L. Helfferich
Jan 01, 0001
Clark Kerr: It is the best of times, it is the worst of times Alumni Day 1969: Tropp takes office as Alumni President; Annual business meeting held; Outstanding graduates honored; Centennial seminar; Honoraries awarded ...
Ursinus College Collegeville Pennsylvania alumni Deaths Marriages Clark Kerr Walter M. Tropp Gerald M. Edelman Mildred G. Fox Football fundraising track team baseball lacrosse softball tennis field hockey golf Thomas J. Beddow William W. Heefner Frank Smith Higher Education Social History United States History
Published by: Ursinus College
The Kijowski–Liu–Yau quasi-local mass of the Kerr black hole horizon
We use the isometric embedding of the spatial horizon of fast rotating Kerr
black hole in a hyperbolic space to compute the quasi-local mass of the horizon
for any value of the spin parameter $j=J/m^2$. The mass is...
Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Abstract The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In...
Highway to Hell? Images of the American Road in Kelly Reichardt's<i>Old Joy</i>,<i>Wendy and Lucy</i>, and<i>Meek's Cutoff</i>
This article examines representations of the road in the work of independent Florida-born film director Kelly Reichardt. Reading Reichardt's so-called Oregon trilogy,Old...
DIARMUID HESTER
Dec 10, 2018
The Kijowski–Liu–Yau quasi-local mass of the Kerr black hole horizon * * Dedicated to Gary Gibbons on the occasion of his 75th birthday.
Abstract: We use an isometric embedding of the cross-over surface of the outer horizon of a rapidly rotating Kerr black hole in a hyperbolic space to compute the quasi-local mass of the horizon for any allowed value of the spin...
Mode Stability for the Teukolsky Equation on Extremal and Subextremal Kerr Spacetimes
Rita Teixeira da Costa
Jul 17, 2020
Abstract: We prove that there are no exponentially growing modes nor modes on the real axis for the Teukolsky equation on Kerr black hole spacetimes, both in the extremal and subextremal case. We also give a quantitative...
Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Abstract: The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In this paper, we use QPOs within...
Raman solitons in waveguides with simultaneous quadratic and Kerr nonlinearities
We analyze Raman-induced self-frequency shift in two-component solitons supported by both quadratic and cubic nonlinearities. Treating Raman terms as a perturbation, we derive expressions for soliton velocity and frequency...
Mode Stability for the Teukolsky Equation on Extremal and Subextremal Kerr Spacetimes
Rita Teixeira da Costa
Jul 28, 2021
Abstract: We prove that there are no exponentially growing modes nor modes on the real axis for the Teukolsky equation on Kerr black hole spacetimes, both in the extremal and subextremal case. We also give a quantitative...
Threshold of complexity and Arnold tongues in Kerr-ring microresonators
We show that the threshold condition for two pump photons to convert into a pair of the sideband ones in Kerr microresonators with high-quality factors breaks the pump laser parameter space into a sequence of narrow in frequency...
Alterations in PTEN and PIK3CA in colorectal cancers in the EPIC Norfolk study
Adam Naguib, James C Cooke, Lisa Happerfield, Lucy Kerr, Laura J Gay, Robert N Luben, Richard Y Ball, Panagiota N Mitrou, Alison McTaggart, Mark J Arends
Jun 16, 2011
Adenocarcinoma Aged Aged 80 and over Class I Phosphatidylinositol 3-Kinases Colonic Neoplasms DNA Mutational Analysis Disease Progression Female Gene Expression Regulation Neoplastic Genetic Association Studies Humans Immunohistochemistry Male Middle Aged Mutation PTEN Phosphohydrolase Phosphatidylinositol 3-Kinases Proto-Oncogene Mas Sex Factors Surveys and Questionnaires
Eigenvalue repulsions and quasinormal mode spectra of Kerr-Newman
The frequency spectra of the gravito-electromagnetic perturbations of the
Kerr-Newman (KN) black hole with the slowest decay rate have been computed
recently. It has been found that KN has two families $-$ the photon sphere...
The Trumpington Cross in context
SJ Lucy
May 11, 2017
An Anglo-Saxon gold and garnet cloisonné pectoral cross from a seventh-century bed burial at Trumpington, Cambridgeshire in 2011 is the fifth such example to be found. Details of the contextual associations of the five crosses...
Changes in perceived scientific consensus shift beliefs about climate change and GM food safety.
Despite an overwhelming scientific consensus, a sizable minority of people doubt that human activity is causing climate change. Communicating the existence of a scientific consensus has been suggested as a way to correct...
Compliance of participants undergoing a ‘5-2’ intermittent fasting diet and impact on body weight
Background
Intermittent fasting (IF) has grown in popularity as a weight loss tool, where caloric intake is fully/partially restricted on a recurring basis. This study aimed to assess compliance with IF fast-day calorie...
Intermittent fasting (IF) has grown in popularity as a weight loss tool, where caloric intake is fully/partially restricted on a recurring basis. This study aimed to assess compliance with IF fast-day calorie...
Construction-Worker Father Inspires Future Teacher's Award-Winning Story
Winthrop University
Jan 01, 0001
Quick Facts
Lucy Gardner is a middle level education major from Chester, South Carolina. She was awarded $1,000 and the student fiction prize for her short story, "When the Storm Ends."
Published by: Winthrop University
Pharmacological Preconditioning with GYKI 52466
Some toxins and drugs can trigger lasting neuroprotective mechanisms that enable neurons to resist a subsequent severe insult. This "pharmacological preconditioning" has far-reaching implications for conditions in which blood...
Extract Clinical Lab Tests From Electronic Hospital Records Through Featured Transformer Model
Natural language, as a rich source of information, has been used as the foundation of the product review, the demographic trend, and the domain specific knowledge bases. To extract entities from texts, the challenge is, free...
Published by: IGI Global Scientific Publishing
The Ursinus Weekly, December 10, 1917
Sophomore eleven defeats freshmen "The Merchant of Venice" Ursinus quintet loses to Penn Review of the 1917 football season Christian associations Vesper services Literary societies College directory On the campus ...
Ursinus College Collegeville Pennsylvania newspaper Raymond E. Wilhelm Football Basketball YMCA YWCA Zwinglian literary society Schaff literary society cultural history Higher Education Liberal Studies Social History United States History
Published by: Ursinus College
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