Results 61 to 70 of about 18,556 (174)

Quantum Caustics for Systems with Quadratic Lagrangians in Multi-Dimensions [PDF]

, 1999
We study quantum caustics in $d$-dimensional systems with quadratic Lagrangians. Based on Schulman's procedure in the path-integral we derive the transition amplitude on caustics in a closed form for generic multiplicity $f$, and thereby complete the ...
Berry, Cheng, Courant, Dangelmayr, DeWitt-Morette, DeWitt-Morette, Ferreira, Feynman, Gel'fand, Hagedorn, Hitoshi Miyazaki, Horie, Horie, Horváthy, Izumi Tsutsui, Jevicki, Kenichi Horie, Kravtsov, Levit, Maslov, Milnor, Morse, Schulman, Schulman, Souriau, Witten   +25 more
core   +3 more sources

Origami constraints on the initial-conditions arrangement of dark-matter caustics and streams

, 2012
In a cold-dark-matter universe, cosmological structure formation proceeds in rough analogy to origami folding. Dark matter occupies a three-dimensional 'sheet' of free- fall observers, non-intersecting in six-dimensional velocity-position phase space. At
Abel, Aragón-Calvo, Aragón-Calvo, Arnold, Arnold, Asratian, Bond, Chartrand, Diaferio, Falck, Gjerde, Guthrie, Hahn, Hogan, Hull, Hull, Icke, Kofman, Lang, Lavaux, Mark C. Neyrinck, Martin, Mohayaee, Natarajan, Neyrinck, Platen, Pogosyan, Row, Shandarin, Sousbie, Sousbie, Springel, Vogelsberger, White, Zel'dovich   +34 more
core   +1 more source

The Asymmetric Merger of Black Holes [PDF]

, 1999
We study event horizons of non-axisymmetric black holes and show how features found in axisymmetric studies of colliding black holes and of toroidal black holes are non-generic and how new features emerge.
A. M. Abrahams, C. W. Misner, D. Gannon, G. J. Galloway, G. J. Galloway, H. Friedrich, H. Friedrich, J. L. Friedman, J. Libson, J. Massó, Jeffrey Winicour, L. Lehner, M. Siino, M. Siino, M. V. Berry, N. T. Bishop, N. T. Bishop, P. Anninos, P. Anninos, P. M. Morse, P. T. Chruściel, R. A. Matzner, R. Gómez, R. K. Sachs, R. W. Brankin, R. Wald, S. A. Hayward, S. A. Hughes, S. Browdy, S. Shapiro, S. Shapiro, S. W. Hawking, S. W. Hawking, Sascha Husa, T. Jacobson   +34 more
core   +3 more sources

Wavefronts, caustic sheets, and caustic surfing in gravitational lensing

Journal of Mathematical Physics, 2002
Very little attention has been paid to the properties of optical wavefronts and caustic surfaces due to gravitational lensing. Yet the wavefront-based point of view is natural and provides insights into the nature of the caustic surfaces on a gravitationally lensed lightcone.
Frittelli, Simonetta, Petters, A. O.
openaire   +3 more sources

Investigating the predictive factors of gastrointestinal lesions due to consumption of household sodium hypochlorite in pediatric and adult Rasht referral hospitals

Journal of Current Oncology and Medical Sciences, 2022
Introduction: Sodium hypochlorite is a corrosive substance with an alkaline nature that can lead to intoxication. This study aimed to evaluate the demographic, clinical, and endoscopic findings of swallowing this substance and to investigate the ...
Alireza Badsar , Morteza Rahbar Taramsari , Mirsaeed Attarchi , Hamid Mohammadi Kojidi, Shohreh Maleknejad , Ehsan Kazemnezhad Leyli , Erfan Badsar Razi , Masihollah Khayatzadeh   +7 more
doaj  

Fractal catastrophes

New Journal of Physics, 2020
We analyse the spatial inhomogeneities (‘spatial clustering’) in the distribution of particles accelerated by a force that changes randomly in space and time.
J Meibohm, K Gustavsson, J Bec, B Mehlig
doaj   +1 more source

Catastrophe optics of caustics in single and bilayer graphene: fine structure of caustics [PDF]

, 2010
We theoretically study the scattering of a plane wave of a ballistic electron on a circular n-p junction in single and bilayer graphene. We compare the exact wave function inside the junction to that obtained from a semiclassical formula developed in ...
Berry, Cheianov, Cserti, Katsnelson, Péterfalvi, Shelby, Thom, Veselago, Vodo   +8 more
core   +2 more sources

Esophageal burn injuries with alkali in children: A four year comprehensive analysis study

Iranian Journal of Pediatric Surgery, 2017
Introduction: The incidence of caustic ingestion injuries in developed countries has been decreasing, while it still remains a great concern in developing countries including Iran.
Ali Forotan, Mehrdad Soveyd, Abbas Banani, Seyed Hesamaddin Banihashemi, Hamidreza Forotan   +4 more
doaj   +1 more source

Caustics in Dark Matter Haloes

, 2005
Caustics are formally singular structures, with infinite density, that form in collisionless media. The non-negligible velocity dispersion of dark matter particles renders their density finite.
Colombi, Stephane, Fort, Bernard, Gavazzi, Raphael, Mohayaee, Roya, Shandarin, Sergei, Touma, Jihad   +5 more
core   +1 more source

The Impact of Caustic Ingestion on Nutritional Status: Case Report

Case Reports in Gastroenterology
Introduction: Caustic injuries remain a major public health concern. Nutritional status plays a pivotal role in determining the outcome. Unfortunately, nutritional care guidelines are not widely implemented in clinical practice, and decisions are often ...
Gašper Razinger, Nada Rotovnik Kozjek
doaj   +1 more source