Results 31 to 40 of about 233,898 (339)

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Infrared Astronomy: More Than Our Eyes Can See Lithograph [PDF]

, 2000
This lithograph uses images of the Orion constellation to illustrate how a common astronomical object appears in both visible light and in the infrared. The back of the lithograph tells the history of infrared light and explains the benefits of infrared ...

core  

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

Astronomia islâmica entre Ptolomeu e Copérnico: tradição Maraghah

Revista Brasileira de Ensino de Física
Este artigo apresenta a descrição, análise e comparação dos modelos da astronomia islâmica na Idade Media com os modelos ptolomaicos para estabelecer o processo de evolução dos modelos cinematicos na Tradição Maraghah e a motivação para o desenvolvimento
Humberto Antonio de Barros-Pereira
doaj   +1 more source

Optical Synoptic Telescopes: New Science Frontiers

, 2010
Over the past decade, sky surveys such as the Sloan Digital Sky Survey have proven the power of large data sets for answering fundamental astrophysical questions.
Tyson, J. Anthony
core   +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

De veranderende bestuurscultuur in wetenschap en universiteit in de jaren zeventig en tachtig

BMGN: Low Countries Historical Review, 2014
Astronomy after Oort: The Changes in Administrative Culture in Science and the Universities in the 1970s and 1980s In the early 1970s Dutch universities were reformed, while scientific research was faced with new social and political demands.
David Baneke
doaj   +1 more source

Wolf's History of Astronomy [PDF]

Nature, 1878
THE “History of Astronomy,” by Prof. Rudolf Wolf, of Zurich, a volume of 800 pages issued at a very moderate figure, is a contribution to the literature of the science of no ordinary value to the student. The production of such a work, involving an outline of the progress of astronomy from the earliest times to the present period, must have been a ...
openaire   +1 more source

Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge

Advanced Functional Materials, EarlyView.
Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu, Shuvankar Gupta, Hengxin Tan, Hyeonhu Bae, Olajumoke Oluwatobiloba Emmanuel, Mingyu Xu, Yan Wu, Xiaofeng Xu, Pengpeng Zhang, Weiwei Xie, Binghai Yan, Xianglin Ke   +11 more
wiley   +1 more source

The Solar Eclipse Predictions of Chiljeongsam-Oepyeon in Early Choseon [PDF]

Journal of Astronomy and Space Sciences, 2004
The history books of East Asia about astronomical phenomena have the more records of the solar eclipse frequently than any other ones. It is because traditionally, the solar eclipse meaned the fate of dynasty and the king's rule.
Young Sook Ahn, Yong Sam Lee
doaj   +1 more source