Results 51 to 60 of about 5,119,857 (297)

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

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

Efficient Astronomical Data Condensation Using Approximate Nearest Neighbors

International Journal of Applied Mathematics and Computer Science, 2019
Extracting useful information from astronomical observations represents one of the most challenging tasks of data exploration. This is largely due to the volume of the data acquired using advanced observational tools.
Łukasik Szymon, Lalik Konrad, Sarna Piotr, Kowalski Piotr A., Charytanowicz Małgorzata, Kulczycki Piotr   +5 more
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
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

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

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

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

Advanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena, J. Terence Blaskovits, Kun‐Han Lin, Denis Andrienko   +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  

Measuring the Hall Effect in Hysteretic Materials

Advanced Materials, EarlyView.
The authors highlight common pitfalls in measuring the Hall effect: in hysteretic magnets, improper data processing can create signals that look exotic but are not real. This Perspective explains the origin of these artifacts and presents practical measurement strategies that help researchers identify reliable Hall responses in complex magnetic ...
Jaime M. Moya, Anthony Voyemant, Sudipta Chatterjee, Scott B. Lee, Grigorii Skorupskii, Connor J. Pollak, Leslie M. Schoop   +6 more
wiley   +1 more source