Results 51 to 60 of about 207,262 (276)

Non Thermal‐Driven Photocatalytic Ammonia Decomposition at Near‐Room Temperature on a Plasmonic Nanocone Array

Advanced Functional Materials, EarlyView.
Plasmonic photocatalytic ammonia decomposition occurs at near‐room temperature on a plasmonic Au nanocone array under visible light illumination. The nanostructure efficiently harnesses plasmonic modes, leading to increased reaction rates upon plasmon decay.
Thanh‐Lam Bui, S. M. Hossein Hejazi, Jan Navrátil, Hana Kmentová, Petr Bábor, Olivier Henrotte, Luca Mascaretti, Matteo Bisetto, Stephen K. Sanders, Andrea Schirato, Michal Otyepka, Piotr Błoński, Tiziano Montini, Radek Zboril, Paolo Fornasiero, Alessandro Alabastri, Alberto Naldoni, Stepan Kment   +17 more
wiley   +1 more source

Application of Time Transfer Function to McVittie Spacetime: Gravitational Time Delay and Secular Increase in Astronomical Unit

, 2011
We attempt to calculate the gravitational time delay in a time-dependent gravitational field, especially in McVittie spacetime, which can be considered as the spacetime around a gravitating body such as the Sun, embedded in the FLRW (Friedmann-Lema\^itre-
B. Mashhoon, B.C. Nolan, B.C. Nolan, C. Le Poncin-Lafitte, C. Lämmerzahl, C.W. Misner, E.V. Pitjeva, F. Felice de, F. Felice de, G. Järnefelt, G. Järnefelt, G. Krasinsky, G.C. McVittie, G.G. Nyambuya, H. Arakida, H. Arakida, H.P. Robertson, Hideyoshi Arakida, J.D. Anderson, J.L. Synge, L. Iorio, L. Iorio, M. Carrera, M.A.C. Perryman, M.H. Soffel, P. Teyssandier, S.A. Klioner, S.A. Klioner, S.G. Turyshev, S.M. Kopeikin, S.M. Kopeikin, T. Miura, V.A. Brumberg, W.T. Ni   +33 more
core   +1 more source

Search and Discovery Tools for Astronomical On-line Resources and Services [PDF]

, 2000
A growing number of astronomical resources and data or information services are made available through the Internet. However valuable information is frequently hidden in a deluge of non-pertinent or non up-to-date documents.
Egret, Daniel, Hanisch, Robert J., Murtagh, Fionn   +2 more
core   +2 more sources

Astronomical and Astrological Terms in Ibn Ezra's Biblical Commentaries: A New Approach [PDF]

Culture and Cosmos, 2009
Abraham ibn Ezra (Tudela, 1089/1092-1164/1167) was the most important writer of scientific treatises in Hebrew in the twelfth century; prior to him and his predecessor, Abraham bar Hiyya (d. after 1136), Arabic was the only language of scientific knowledge among Jews.
openaire   +1 more source

Secular Increase of the Astronomical Unit: a Possible Explanation in Terms of the Total Angular-Momentum Conservation Law [PDF]

Publications of the Astronomical Society of Japan, 2009
Abstract We give an idea and order-of-magnitude estimations to explain a recently reported secular increase of the Astronomical Unit ($AU$) by Krasinsky and Brumberg (2004, Celest. Mech. Dyn. Astron., 90, 267). The idea proposed is analogous to tidal acceleration in the Earth–Moon system, which is based on conservation of the total ...
Miura, Takaho, Arakida, Hideyoshi, Kasai, Masumi, Kuramata, Shuichi   +3 more
openaire   +2 more sources

Flux‐Regulated Crystallization of Perovskites Using Machine Learning‐Predicted Solvent Evaporation Rates for X‐Ray Detectors

Advanced Functional Materials, EarlyView.
By integrating machine learning into flux‐regulated crystallization (FRC), accurate prediction of solvent evaporation rates in real time, improving crystallization control and reducing crystal growth variability by over threefold, is achieved. This enhances the reproducibility and quality of perovskite single crystals, leading to reproducible ...
Tatiane Pretto, Sergey Dayneko, Antoine Pavesic Junior, Nicholas Sandor, Alexander Hart, Yuki Haruta, Magdalena Bazalova‐Carter, Marcos J. L. Santos, Makhsud I. Saidaminov   +8 more
wiley   +1 more source

A Brief Review of Unsupervised Machine Learning Algorithms in Astronomy: Dimensionality Reduction and Clustering

Universe
This review investigates the application of unsupervised machine learning algorithms to astronomical data. Unsupervised machine learning enables researchers to analyze large, high-dimensional, and unlabeled datasets and is sometimes considered more ...
Chih-Ting Kuo, Duo Xu, Rachel Friesen
doaj   +1 more source

A New Nonparametric Test for Two Sample Multivariate Location Problem with Application to Astronomy

Journal of Statistical Theory and Applications (JSTA), 2019
This paper provides a nonparametric test for the identity of two multivariate continuous distribution functions when they differ in locations. The test uses Wilcoxon rank-sum statistics on distances between observations for each of the components and is ...
Soumita Modak, Uttam Bandyopadhyay
doaj   +1 more source

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source

The Analysis of the Relation between virgo and leo in a Verse of Nezami [PDF]

متن شناسی ادب فارسی, 2013
Nezami Ganjavi is one of the famous figures of Persian poetry whose poetry has been considered to need commentary and interpretation for a long time. One of the reasons of complexity in his poems is the precise usage of astronomical terms and imagery ...
a Heydari
doaj