Results 41 to 50 of about 12,199,946 (296)

GRRIS: A Real-time Intrasite Observation Scheduling Scheme for Distributed Survey Telescope Arrays

The Astronomical Journal
The distributed telescope array offers promise for conducting large-sky-area, high-frequency time-domain surveys. Multiple telescopes can be deployed at each observation site, so intrasite observation task scheduling is crucial for enhancing observation ...
Yajie Zhang, Ce Yu, Chao Sun, Yi Hu, Zhaohui Shang, Jizeng Wei, Xu Yang   +6 more
doaj   +1 more source

Bulk‐Like Spin Cycloid and Fast Switching in Freestanding BiFeO3

Advanced Functional Materials, EarlyView.
Freestanding BiFeO3 membranes overcome substrate‐induced constraints by simultaneously restoring the intrinsic bulk‐like spin cycloid and enabling ≈50% faster ferroelectric switching than substrate‐clamped epitaxial thin films. This combination of robust noncollinear antiferromagnetic order and efficient electric‐field switching establishes ...
Pratap Pal, Xiaoxi Deng, Gi‐Yeop Kim, Kyoungjun Lee, Jheng‐Cyuan Lin, Prithwijit Mandal, Jiangfeng Yang, Paul Steadman, Pascal Manuel, Roger D. Johnson, Si‐Young Choi, Paolo G. Radaelli, Chang‐Beom Eom   +12 more
wiley   +1 more source

Review of topo-astronomical methods for the precise orientation in archaeological sites

, 2009
Cosmology across cultures; workshop held at Parque de las Ciencias, Granada, Spain, 8-12 September 2008.A review of the methods and instrumentation used in the determination of topo-astronomical alignments is presented in this paper, with a detailed ...
Folgueira López, Marta, Pascual, Esther, Mejuto, Javier, Rodríguez Caderot, Gracia   +3 more
core   +1 more source

The astronomical significance of the clockwise misalignment from cardinal directions in the Maya lowlands [PDF]

Archaeoastronomy and Ancient Technologies, 2014
In this paper we outline the results of our archaeoastronomical study dealing with a number of Mayan settlements located in the lowlands of Campeche, Yucatan and Quintana Roo (Mexico), in order to try to explain the well- known clockwise misalignments ...
Motta, S., Gaspani, A.
doaj   +1 more source

Query driven visualization of astronomical catalogs [PDF]

, 2011
Interactive visualization of astronomical catalogs requires novel techniques due to the huge volumes and complex structure of the data produced by existing and upcoming astronomical surveys.
Hugo Buddelmeijer, Edwin A. Valentijn, Hugo HugoBuddelmeijer, Buddelmeijer, Hugo, Buddelmeijer, Hugo; id_orcid, Valentijn, Edwin A., Valentijn, Edwin A.; id_orcid   +6 more
core   +2 more sources

A Technology for Deblurring Astronomical Images [PDF]

, 2022
This paper focuses on a specific technology for deblurring astronomical images. Data are collected as digital matrices of image pixels. The technology reconstructs the object via computational manipulation of the blurred image.
Tidrick, Thomas H
core   +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

Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene

Advanced Materials, EarlyView.
In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar, James G. McHugh, Jonathan P. Salvage, Robert Vajtai, Venkataramana Gadhamshetty, Alan B. Dalton, Manoj Tripathi, Pulickel M. Ajayan, Vincent Meunier   +8 more
wiley   +1 more source

Automated Scheduling of Doppler Exoplanet Observations at Keck Observatory

The Astronomical Journal
Precise Doppler studies of extrasolar planets require fine-grained control of observational cadence, i.e., the timing of and spacing between observations.
Luke B. Handley, Erik A. Petigura, Velibor V. Mišić, Jack Lubin, Howard Isaacson   +4 more
doaj   +1 more source

Point Spread Functions in Identification of Astronomical Objects from Poisson Noised Image [PDF]

Radioengineering, 2016
This article deals with modeling of astronomical objects, which is one of the most fundamental topics in astronomical science. Introduction part is focused on problem description and used methods.
F. Mojzis, J. Kukal, J. Svihlik
doaj