Results 141 to 150 of about 186,264 (366)

Ghost-free infinite derivative gravity

Journal of High Energy Physics, 2018
We present the construction of a gravitational action including an infinite series of higher derivative terms. The outcome is a classically consistent completion of a well-studied quadratic curvature theory.
Brage Gording, Angnis Schmidt-May
doaj   +1 more source

Analysis of Multiscale Condensation Phenomena Using a Zero‐Shot Computer Vision Framework

Advanced Science, EarlyView.
A zero‐shot computer vision framework quantifies multiscale condensation dynamics by automatically segmenting droplets and extracting physical parameters without labeled data. The workflow integrates data mining and statistical analysis to reveal droplet growth, coalescence statistics, and sweeping behaviors, enabling label‐free measurement of heat ...
Donghyeong Lee, Seokwan Roh, Jaewoo Jeong, Kuk‐Jin Yoon, Jungchul Lee, Youngsuk Nam   +5 more
wiley   +1 more source

Sachs’ free data in real connection variables

Journal of High Energy Physics, 2017
We discuss the Hamiltonian dynamics of general relativity with real connection variables on a null foliation, and use the Newman-Penrose formalism to shed light on the geometric meaning of the various constraints.
Elena De Paoli, Simone Speziale
doaj   +1 more source

Redefining Gravity: The Role of Active Time Theory in Unifying Quantum and Classical Physics

SSRN Electronic Journal
Maher Abdelsamie
openalex   +2 more sources

Electrochemical Nitrate Reduction Reaction to Ammonia at Industrial‐Level Current Densities

Advanced Science, EarlyView.
This review starts from the mechanism and theoretical basis of electrochemical nitrate reduction reaction (NO3−RR), and systematically summarizes and discusses the design strategies of industrial‐level current density catalysts. In addition, the progress of industrial‐level NO3−RR‐based electrolyzers, including flow reactor and membrane electrode ...
Zhijie Cui, Honghai Wang, Chunli Li, Wenchao Peng, Jiapeng Liu   +4 more
wiley   +1 more source

Universal spacetimes in four dimensions

Journal of High Energy Physics, 2017
Universal spacetimes are exact solutions to all higher-order theories of gravity. We study these spacetimes in four dimensions and provide necessary and sufficient conditions for universality for all Petrov types except of type II.
S. Hervik, V. Pravda, A. Pravdová
doaj   +1 more source

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

Advanced Electronic Materials, EarlyView.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons

Journal of High Energy Physics, 2018
The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons.
Graham M. Shore
doaj   +1 more source

Hamiltonian dynamics and Noether symmetries in Extended Gravity Cosmology

, 2012
We discuss the Hamiltonian dynamics for cosmologies coming from Extended Theories of Gravity. In particular, minisuperspace models are taken into account searching for Noether symmetries.
A. Felice De, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A.A. Starobinsky, A.G. Riess, A.K. Sanyal, A.L. Berkin, B.S. DeWitt, C. Kiefer, C.G. Callan Jr., C.M. Will, C.W. Misner, C.W. Misner, C.W. Misner, C.W. Misner, C.W. Misner, C.W. Misner, D. Finkelstein, D. La, D.N. Spergel, E.E. Flanagan, G. Allemandi, G. Allemandi, G. Magnano, G. Magnano, G. Marmo, G. Vilkovisky, H. Everett, I. Hussain, I.L. Buchbinder, J. Bekenstein, J.A. Wheeler, J.B. Hartle, J.B. Hartle, J.B. Hartle, J.B. Hartle, J.B. Hartle, J.D. Logan, J.J. Halliwell, J.J. Halliwell, J.J. Halliwell, J.J. Halliwell, J.J. Halliwell, J.L. Synge, K. Maeda, K.A. Bronnikov, K.A. Bronnikov, K.A. Bronnikov, L. Amendola, M. De Laurentis, M. Jamil, M. Jamil, M. Milgrom, M.A. Lorentz, M.S. Madsen, N.A. Bahcall, N.A. Chernikov, N.D. Birrell, N.R. Napolitano, P. Teyssandier, P.J.E. Peebles, R. Arnowitt, R. Casadio, R. Kerner, R. Penrose, R. Ritis de, R.M. Wald, S. Basilakos, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Cole, S. D. Odintsov, S. Gottlöber, S. Gottlöber, S. Nojiri, S. Nojiri, S. Nojiri, S. Nojiri, S. Weinberg, S.M. Carroll, S.M. Carroll, S.W. Hawking, T. Clifton, T. Padmanabhan, T.P. Sotiriou, T.P. Sotiriou, U. Seljak, V. Faraoni, V. Faraoni, V. Faraoni, V. Faraoni, V.I. Arnold, Y. Choquet-Bruhat   +122 more
core   +1 more source

Beyond Silicon: Toward Sustainable, NIR‐II, and Conformable Organic Photodiodes

Advanced Energy Materials, EarlyView.
In this perspective, a strategic shift in organic photodetector (OPD) research is proposed: instead of the incremental advances in silicon's stronghold arena, the most impactful future for OPDs lies in addressing silicon's intrinsic limitations, i.e., detection in the longer wavelength range above silicon's coverage (>1100 nm, termed as near infrared ...
Hrisheekesh Thachoth Chandran, Jiaming Huang, Hao Xia, Rakesh Rajendran Nair, Shen Xing, Gang Li, Karl Leo, Johannes Benduhn   +7 more
wiley   +1 more source