Results 31 to 40 of about 36,720 (153)

A dinâmica de um elipsoide em rotação

Revista Brasileira de Ensino de Física
Um fenômeno físico interessante que contraria nosso senso comum concerne à dinâmica do movimento de um elipsoide em rotação numa superfície não lisa. Um elipsoide em rotação é, por exemplo, um ovo cozido, girando numa mesa de superfície áspera.
Laysa G. Martins, José A.C. Nogales
doaj   +1 more source

Advances in CALIPSO (IIR) cirrus cloud property retrievals – Part 2: Global estimates of the fraction of cirrus clouds affected by homogeneous ice nucleation [PDF]

Atmospheric Chemistry and Physics
Cirrus clouds can form through two ice nucleation pathways (homo- and heterogeneous ice nucleation; henceforth hom and het, respectively) that result in very different cloud physical and radiative properties.
D. L. Mitchell, A. Garnier
doaj   +1 more source

Approximate analytical and numerical solutions of a nonlinear boundary value problem in fluid mechanics based on symmetry reduction

Partial Differential Equations in Applied Mathematics, 2020
This work presents applications of the Liesymmetry method to a boundary value problem (BVP) of the governing equations in fluid mechanics. The Wu differential characteristic set algorithm is used to obtain a group of multi-parameter symmetries for the ...
Litao Gai, Mingchu Li, Bilige Sudao
doaj   +1 more source

Regional Characterization of Deep Convective Clouds for Enhanced Imager Stability Monitoring and Methodology Validation

Remote Sensing
The NASA CERES project conducts an independent assessment of the calibration stability of MODIS and VIIRS reflective solar bands to ensure consistency in CERES-derived clouds and radiative flux products.
David Doelling, Prathana Khakurel, Conor Haney, Arun Gopalan, Rajendra Bhatt   +4 more
doaj   +1 more source

Analytic continuation of stochastic mechanics [PDF]

Journal of Mathematical Physics, 2022
We study a (relativistic) Wiener process on a complexified (pseudo-)Riemannian manifold. Using Nelson’s stochastic quantization procedure, we derive three equivalent descriptions for this problem. If the process has a purely real quadratic variation, we obtain the one-sided Wiener process that is encountered in the theory of Brownian motion.
openaire   +2 more sources

Analytical Mechanics [PDF]

Nature, 1890
n ...
openaire   +1 more source

Finite element simulation of barge impact into a rigid wall

Alexandria Engineering Journal, 2014
The forces and locations of inland barge impacts currently control the design specifications for lock walls. This has resulted in a significant increase in the final construction costs of these walls.
H.W. Leheta, A.M. Elhewy, W. El Sayed Mohamed   +2 more
doaj   +1 more source

Entropy regularized reinforcement learning using large deviation theory

Physical Review Research, 2023
Reinforcement learning (RL) is an important field of research in machine learning that is increasingly being applied to complex optimization problems in physics.
Argenis Arriojas, Jacob Adamczyk, Stas Tiomkin, Rahul V. Kulkarni   +3 more
doaj   +1 more source

Sea salt reactivity over the northwest Atlantic: an in-depth look using the airborne ACTIVATE dataset [PDF]

Atmospheric Chemistry and Physics
Chloride (Cl−) displacement from sea salt particles is an extensively studied phenomenon with implications for human health, visibility, and the global radiation budget.
E.-L. Edwards, Y. Choi, Y. Choi, E. C. Crosbie, E. C. Crosbie, J. P. DiGangi, G. S. Diskin, C. E. Robinson, C. E. Robinson, M. A. Shook, E. L. Winstead, E. L. Winstead, L. D. Ziemba, A. Sorooshian, A. Sorooshian   +14 more
doaj   +1 more source

Neural network-based snow depth retrieval from AMSR-2 brightness temperatures using ICESat-2 measurement as ground truth

Frontiers in Remote Sensing
IndroductionEstimating snow depth over Arctic sea ice is essential for understanding climate processes and supporting operational forecasting. Previous work has demonstrated the use of lidar backscattering pathlength moments from Ice, Cloud, and land ...
Sunny Sun-Mack, Yongxiang Hu, Xiaomei Lu, Yan Chen, Ali Omar   +4 more
doaj   +1 more source