Results 61 to 70 of about 148,127 (281)

Asymmetry of the Ferroelectric Phase Transition in BaTiO3

Advanced Materials, EarlyView.
Phase transitions are typically assumed to behave identically in forward and reverse. This work shows that in the ferroelectric material barium titanate this is not true: heating drives an abrupt, first‐order jump, while cooling gives a smooth, continuous change.
Asaf Hershkovitz, Elangovan Hemaprabha, Rajesh Mandal, Pravin Kavle, Jamil Tanus, Maya Barzilay, Ching‐Che Lin, David Spirito, Semën Gorfman, Bo Wang, Ignacio J. Villar‐García, Neus Domingo, Long‐Qing Chen, Lane W. Martin, Yachin Ivry   +14 more
wiley   +1 more source

Commensal observing with the Allen Telescope array: software command and control

, 2010
The Allen Telescope Array (ATA) is a Large-Number-Small-Diameter radio telescope array currently with 42 individual antennas and 5 independent back-end science systems (2 imaging FX correlators and 3 time domain beam formers) located at the Hat Creek ...
Ackermann, Robert, Barott, William C., Gutierrez-Kraybill, Colby, Harp, Gerald, Keating, Garrett K., Kilsdonk, Tom, MacMahon, David, Richards, Jon, Williams, Peter K. G.   +8 more
core   +1 more source

The Double Quasar HE1104-1805: a case study for time delay determination with poorly sampled lightcurves [PDF]

, 2001
We present a new determination of the time delay of the gravitational lens system HE1104-1805 ('Double Hamburger') based on a previously unpublished dataset.
Courbin, Courbin, Edelson, Falco, Goicoechea, J. Wambsganss, L. Wisotzki, Lehár, Lehár, Lidman, López, Pelt, Pelt, R. Gil-Merino, Remy, Serra-Ricart, Smette, Stetson, Wisotzki, Wisotzki, Wisotzki   +20 more
core   +2 more sources

A Map of the Outer Gas Disk of the Galaxy with Direct Distances from Young Stars

The Astrophysical Journal
For more than 50 yr, astronomers have mapped the neutral hydrogen gas in the Galaxy assuming kinematically derived distances. We employ the distances of nearby young stars, which trace the gas from which they formed, in longitude–latitude–velocity space ...
Peter Craig, Sukanya Chakrabarti, Alexander R. Pettitt, Robyn Sanderson, Erik Rosolowsky   +4 more
doaj   +1 more source

RoboTAP: Target priorities for robotic microlensing observations [PDF]

, 2017
Context. The ability to automatically select scientifically-important transient events from an alert stream of many such events, and to conduct follow-up observations in response, will become increasingly important in astronomy.
A. Cassan, Bachelet, Beaulieu, Bennett, Bennett, Bond, Bozza, Bramich, Brown, Burgdorf, C. Ranc, C. Snodgrass, Cassan, D. M. Bramich, D. Maoz, Dominik, Dominik, Dominik, Dominik, E. Bachelet, G. D’Ago, Gaudi, Gould, Gould, Gould, Gould, Han, Henderson, Horne, I. A. Steele, J. Menzies, J. Wambsganss, K. Horne, K. Ment, Lada, Law, M. Dominik, M. Hundertmark, Mao, N. Kains, Paczyński, Park, R. A. Street, R. Figuera Jaimes, R. W. Schmidt, Raghavan, Ridgway, S. Cross, S. Mao, Saha, Shvartzvald, Smith, Snodgrass, Steele, Street, Street, Street, Sumi, Sumi, Tsapras, Tsapras, Tsapras, Udalski, Udalski, V. Bozza, Wambsganss, Wyrzykowski, Y. Shvartzvald, Y. Tsapras, Yee, Yee, Z. Li   +71 more
core   +5 more sources

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

RF Environment Test on a Proposed Site for the Sensor Station of the Next Generation Satellite Navigation System, GALILEO: I. The Result of the Test on the Vicinity of KVN Tamla Site in the Year of 2006 by KASI [PDF]

Journal of Astronomy and Space Sciences, 2008
As the next generation of global satellite navigation system, the Galileo project is about to witness an initial orbit validation stage as the successful test of navigation message transmission from Giove-A in 2007.
Jung Hyun Jo, Do-Hyeung Je, Sungki Cho, Byung Kyu Choi, Jeongho Baek, Daekyu Lee, Hyunsoo Chung, Hyung-Chul Lim, Jung-Ho Cho, Woo-Kyoung Lee, Sung-Wook Jung, Jong-Uk Park, Nammi Choe   +12 more
doaj   +1 more source

Data Management in Time-Domain Astronomy: Requirements and Challenges [PDF]

, 2019
In time-domain astronomy, we need to use the relational database to manage star catalog data. With the development of sky survey technology, the size of star catalog data is larger, and the speed of data generation is faster. So, in this paper, we make a systematic and comprehensive introduction to process the data in time-domain astronomy, and ...
Yang, Chen, Meng, Xiaofeng, Du, Zhihui, Duan, Zhiqiang, Du, Yongjie   +4 more
openaire   +2 more sources

The Fly's Eye Camera System -- an instrument design for large \'etendue time-domain survey [PDF]

, 2013
In this paper we briefly summarize the design concepts of the Fly's Eye Camera System, a proposed high resolution all-sky monitoring device which intends to perform high cadence time domain astronomy in multiple optical passbands while still accomplish a
Csépány, Gergely, Döbrentei, László, Farkas, Ernő, Jaskó, Attila, Kiss, Csaba, Mező, György, Mészáros, László, Oláh, Katalin, Pál, András, Regály, Zsolt, Schlaffer, Ferenc, Vida, Krisztián   +11 more
core   +3 more sources

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