Results 81 to 90 of about 264 (216)

Empirical Means on Pseudo-Orthogonal Groups

Mathematics, 2019
The present article studies the problem of computing empirical means on pseudo-orthogonal groups. To design numerical algorithms to compute empirical means, the pseudo-orthogonal group is endowed with a pseudo-Riemannian metric that affords the ...
Jing Wang, Huafei Sun, Simone Fiori
doaj   +1 more source

Axial Symmetry Cosmological Constant Vacuum Solution of Field Equations with a Curvature Singularity, Closed Time-Like Curves, and Deviation of Geodesics

Advances in High Energy Physics, 2020
In this paper, we present a type D, nonvanishing cosmological constant, vacuum solution of Einstein’s field equations, extension of an axially symmetric, asymptotically flat vacuum metric with a curvature singularity.
Faizuddin Ahmed, Bidyut Bikash Hazarika, Debojit Sarma   +2 more
doaj   +1 more source

Legacy effects of locally extinct flagship species on protected areas

Frontiers in Ecology and the Environment, EarlyView.
Protected areas (PAs) are often established to conserve flagship megafauna so as to mobilize political support and secure sustained conservation investment, with the expectation that flagship‐centered governance will also protect habitat. Despite such efforts, flagship species can experience extirpation, raising a fundamental question: do conservation ...
Rachakonda Sreekar, James EM Watson, Jiajia Liu, Aakash Lamba, Hoong Chen Teo, Jun Ying Lim, Yiwen Zeng   +6 more
wiley   +1 more source

Warm‐wet transition restructures arid lake microbiomes and functional potential

iMetaOmics, EarlyView.
This study summarizes how a long‐term warm‐dry to warm‐wet transition restructures microbiomes and functional potential in Lake Bosten, an arid lake in northwestern China. Warm‐wet hydroclimatic change increased water level and hydrological connectivity, while decreasing salinity and total nitrogen.
Zhen Shen, Xingchen Li, Zhijun Gong, Yang Hu, Yongjiu Cai, Keqiang Shao, Guang Gao, Robbie M. Martin, Xiangming Tang   +8 more
wiley   +1 more source

Closed geodesics on Gödel-type backgrounds [PDF]

Journal of High Energy Physics, 2003
latex, 15 pages, 1 figure.
openaire   +2 more sources

Intercomparison of a Regional Climate Model Ensemble for Selected European Catchments

International Journal of Climatology, EarlyView.
This study analyzes a regional climate model ensemble for water cycle and water resource research with two models. Results show that ICON generally outperforms TSMP1 simulations, mainly with 2‐m temperature and precipitation. These findings serve as a baseline evaluation that shows how key structural differences influence the model skill.
Jane Leonor Roque, Francis Da Silva Lopes, Julian Alberto Giles, Benjamin D. Gutknecht, Bernd Schalge, Yikui Zhang, Marco Ferro, Petra Friederichs, Klaus Goergen, Stefan Poll, Arianna Valmassoi   +10 more
wiley   +1 more source

Lengths of closed geodesics for certain warped product metrics and nearly round metrics on spheres

Journal of Inequalities and Applications
We study warped product metrics on spheres and prove that the shortest length of closed geodesics for such metrics can be bounded above by its volume, under suitable assumptions on the warping function.
Yuhang Liu
doaj   +1 more source

On Closed Geodesics on Ellipsoids

, 2005
Closed geodesic lines on an ellipsoid in d-dimensional Euclidean space are considered. Explicit algebro-geometric condition for closedness of such a geodesic is given. The obtained condition is discussed in light of theta-functions theory and compared with some recent related results.
Dragovic, Vladimir, Radnovic, Milena
openaire   +2 more sources

Decoupling glacier retreat and surface stabilization on the Snežnik Plateau (Slovenia), insights from in situ cosmogenic 36Cl exposure and depth‐profile ages

Journal of Quaternary Science, EarlyView.
ABSTRACT Glaciokarst landscapes pose distinctive challenges for cosmogenic dating because meltwater and runoff can be rapidly rerouted into ponors and conduit networks, weakening glacier–river coupling and promoting local sediment storage. We reconstruct glacier retreat and postglacial stabilization on the Snežnik Plateau (SW Slovenia) using in situ ...
Onur Altınay, Mehmet Akif Sarıkaya, Uroš Stepišnik, Manja Žebre, Cengiz Yıldırım, Attila Çiner, Klaus M. Wilcken   +6 more
wiley   +1 more source

Axially Symmetric Null Dust Space-Time, Naked Singularity, and Cosmic Time Machine

Advances in High Energy Physics, 2017
We present a gravitational collapse null dust solution of the Einstein field equations. The space-time is regular everywhere except on the symmetry axis where it possesses a naked curvature singularity and admits one parameter isometry group, a generator
Faizuddin Ahmed
doaj   +1 more source