Results 41 to 50 of about 6,562 (255)

AGB Stars and Their Circumstellar Envelopes: An Operative Approach to Computing Their Atmospheres

Universe, 2021
The study of AGB stars necessarily covers a wide range of topics, from the primary astronomical observations to their interpretation in terms of fundamental physics.
Lucio Crivellari, Sergio Cristallo, Luciano Piersanti   +2 more
doaj   +1 more source

Evidence for Itinerant Ferromagnetic Flat Bands Producing Large Transverse Responses

Advanced Materials, EarlyView.
Itinerant ferromagnetic flat bands are demonstrated in GdCo5 with a high Curie temperature of 940K, a stacked honeycomb–kagome lattice, through angle‐resolved photoemission spectroscopy and magneto‐thermoelectric measurements. These topological flat bands generate large Berry curvaturte, producing gigantic anomalous Nernst effect with record‐high ...
Susumu Minami, Yangming Wang, Seigo Souma, Hiroto Nakamura, Akito Sakai, Takumi Osumi, Hang Su, Hikaru Watanabe, Shun'ichiro Kurosawa, Rikuto Oiwa, Daisuke Nishio‐Hamane, Kosuke Nakayama, Takuya Nomoto, Ryotaro Arita, Takafumi Sato, Satoru Nakatsuji   +15 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  

Room‐Temperature Skyrmionic Synapse in 2D Ferromagnet Fe3GaTe2 Operating via Collective Spin Texture Transformation

Advanced Materials, EarlyView.
We demonstrate a neuromorphic synapse in 2D Fe3GaTe2 flakes. The device operates via a current‐driven transformation from a skyrmion‐lattice to a stripe‐domain state, yielding a linear anomalous Hall resistance response with a tunable slope to enable multiply‐accumulate operations. Simulations confirm its viability in artificial neural networks.
Jixiang Huang, Tongji Zhu, PeiYu Cai, Xiaoming Ma, Zhen Wang, Ruifu Zhang, Yi Hao, Jingdi Lu, Liubing He, Jun Xu, Yuejie Zhang, Wanjun Jiang, Jing Tao, Shiming Lei, Pavel Parchinskiy, Jing Teng, Lingfei Wang, Wei Niu, Elton J.G. Santos, Xiaoqian Zhang, Peng Li   +20 more
wiley   +1 more source

Bayesian Estimation of Past Astronomical Frequencies, Lunar Distance, and Length of Day From Sediment Cycles

Geochemistry, Geophysics, Geosystems
Astronomical cycles recorded in stratigraphic sequences offer a powerful data source to estimate Earth's axial precession frequency k, as well as the frequency of rotation of the planetary perihelia (gi) and of the ascending nodes of their orbital planes
A. Malinverno, S. R. Meyers
doaj   +1 more source

Estimation of Reliability Function for Complete Data - Article Review [PDF]

المجلة العراقية للعلوم الاحصائية, 2019
The theory of reliability is one of the important theories that is attracting great interest in many researchers at present because of its importance in various fields of life especially in determining the age of a particular device and its efficiency ...
Shaimaa Waleed
doaj   +1 more source

LONG-TERM CALIBRATION STABILITY OF A RADIO ASTRONOMICAL PHASED ARRAY FEED

The Astronomical Journal, 2012
There are many challenges associated with the implementation of a phased array feed for radio astronomy applications. Among these is the need to have an adequate set of calibration measurements so that reliable beamformers can be computed. Changes in the operating environment and temporal gain drift in the electronics contribute to calibration drift ...
Michael Elmer, Brian D. Jeffs, Karl F. Warnick   +2 more
openaire   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

Advanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh, PeiYu Cai, Elton J. G. Santos   +2 more
wiley   +1 more source

An Improved Infrared/Visible Fusion for Astronomical Images

Advances in Astronomy, 2015
An undecimated dual tree complex wavelet transform (UDTCWT) based fusion scheme for astronomical visible/IR images is developed. The UDTCWT reduces noise effects and improves object classification due to its inherited shift invariance property.
Attiq Ahmad, Muhammad Mohsin Riaz, Abdul Ghafoor, Tahir Zaidi   +3 more
doaj   +1 more source

REMARKS ON STAR TERMINOLOGY IN THE PYRAMID TEXTS "Analytical Study in the Linguistic and Orthographic Structure of the Star Terms" [PDF]

International Journal of Multidisciplinary Studies in Heritage Research
The theme of this research aims to investigate and study the terminology of stars in the ancient Egyptian Language through an analytical study of the linguistic and orthographic structure of the star terms in the Old Egyptian language stage, this will be
Tamer Essa, Rasha Omran, Nourhan Elsisi, Ayman Waziry   +3 more
doaj   +1 more source