Results 61 to 70 of about 5,068 (263)

High‐Speed Design of Multiplexed Meta‐Optics Enabled by Physics‐Driven Self‐Supervised Network

Advanced Science, EarlyView.
A physics‐driven self‐supervised network (PDSS‐Net) is proposed for high‐speed, iteration‐free design of multiplexed meta‐optics. By learning a direct mapping from holographic targets to all meta‐atom structures, PDSS‐Net achieves a 1000× speedup over traditional optimization methods in designing 2K RGB meta‐holograms.
Yuqing He, Sheng Ye, Yue Han, Mingna Xun, Qiang Li, Ruiqi Wang, Qihuang Gong, Yan Li   +7 more
wiley   +1 more source

FORMATION AND EVOLUTION OF BLUE STRAGGLERS IN 47 TUCANAE [PDF]

The Astrophysical Journal, 2016
ABSTRACT Blue stragglers (BSS) are stars whose position in the color–magnitude diagram (CMD) places them above the main sequence (MS) turn-off (TO) point of a star cluster. Using data from the core of 47 Tuc in the ultraviolet (UV), we have identified various stellar populations in the CMD, and used their radial distributions to study ...
Ryan Goldsbury, Javiera Parada, Harvey B. Richer, Jason S. Kalirai, Jason S. Kalirai, Jeremy S. Heyl   +5 more
openaire   +4 more sources

Low‐Frequency Microwave Absorption Composites

Advanced Science, EarlyView.
The microwave absorption principles and low‐frequency performance factors are briefly introduced. Recent progress is systematically summarized in five different based composites. Then detailed analysis focuses on relationships and mechanisms about micro‐structure and macro‐performance.
Mukun He, Kaiyu Zhang, Hua Qiu, Hua Guo, Xiangcheng Li, Yongqiang Guo, Yali Zhang, Junwei Gu   +7 more
wiley   +1 more source

Blue Straggler Stars: Early Observations that Failed to Solve the Problem

, 2014
In this chapter, I describe early ideas on blue stragglers, and various observations (some published, some not) that promised but failed to resolve the question of their origin.
A. Miglio, A. R. Sandage, A. R. Sandage, A. R. Sandage, A. Sarajedini, B. Margon, B. Niss, C. A. Murray, C. D. Bailyn, D. C. Morton, D. Pooley, E. M. Burbidge, F. Fusi Pecci, F. Hoyle, F. Paresce, F. R. Ferraro, G. Meynet, G. W. Preston, H. C. Arp, H. C. Arp, H. C. Arp, H. E. Bond, H. E. Bond, H. L. Johnson, H. Spinrad, I. Iben, J. A. Ahumada, J. A. Crawford, J. C. Wheeler, J. Smak, K. A. Montgomery, K. C. Freeman, K. M. Cudworth, L. L. Stryker, M. Livio, N. G. Roman, O. J. Eggen, O. J. Eggen, O. J. Eggen, O. J. Eggen, P. Guhathakurta, P. Hut, P. J. T. Leonard, P. Pesch, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. N. Manchester, R. P. Kraft, R.E. Cohen, T. A. Smecker-Hane, T. D. Kinman, V. Trimble, V. Trimble, W Hiltner, W. H. McCrea, W.L. W. Sargent, Y. Xin, Z. Kopal   +59 more
core   +1 more source

New catalogue of blue stragglers in open clusters [PDF]

Astronomy & Astrophysics, 2006
We present a catalogue of blue-straggler candidates in galactic open clusters. It is based on the inspection of the colour–magnitude diagrams of the clusters, and it updates and supersedes the first version (Ahumada & Lapasset 1995). A new bibliographical search was made for each cluster, and the resulting information is organised into two tables. Some
Ahumada, J. A., Lapasset, E.
openaire   +3 more sources

High‐Density Flexible Neural Implants with Submicron Feedline Resolution

Advanced Electronic Materials, EarlyView.
Optimization of microfabrication methods using optical contact lithography (OCL) and electron beam lithography (EBL) enables the fabrication of 64‐channel, high‐density, parylene‐C‐based intracortical implants with submicron feedlines as narrow as 400 and 50 nm, respectively.
Lina Koschinski, Thomas Grap, Erkan Yilmaz, Marius Kleutgens, Simon Decke, Martin Kasavetov, Marie Jung, Alejandro Carnicer‐Lombarte, George Malliaras, Andreas Offenhäusser, Viviana Rincón Montes   +10 more
wiley   +1 more source

The origin of the two populations of blue stragglers in M30 [PDF]

Astronomy & Astrophysics, 2019
We analyze the position of the two populations of blue stragglers in the globular cluster M30 in the Hertzsprung–Russell diagram. Both populations of blue stragglers are brighter than the cluster’s turn-off, but one population, the blue blue-stragglers, aligns along the zero-age main sequence whereas the other, red population is elevated in brightness (
openaire   +2 more sources

Topological Skyrmion‐Based Spin‐Torque‐Diode Effect in Magnetic Tunnel Junctions

Advanced Electronic Materials, EarlyView.
Electrical excitation and detection of a breathing skyrmion in a nanoscale skyrmion‐based spin‐torque diode at room temperature is achieved. Skyrmions are generated via spin‐transfer torque current induction, and their breathing dynamics are observed through ferromagnetic resonance (FMR) measurements.
Shuhui Liu, Riccardo Tomasello, Yuxuan Wu, Bin Fang, Aitian Chen, Dongxing Zheng, Baoshun Zhang, Emily Darwin, Hans J. Hug, Mario Carpentieri, Wanjun Jiang, Xixiang Zhang, Giovanni Finocchio, Zhongming Zeng   +13 more
wiley   +1 more source

Modeling the radial distribution of blue stragglers in M3

The Astrophysical Journal, 1994
Recent surveys of the blue straggler (BS) population in the galactic globular cluster M3 (NGC 5272) give the first complete characterization of the number density of BSs as a function of radius over an entire globular cluster. The BSs in M3 are overabundant at large radii, and significantly underabundant at intermediate radii.
Steinn Sigurdsson, Melvyn B. Davies, Michael Bolte   +2 more
openaire   +4 more sources

Stellar Collisions and the Interior Structure of Blue Stragglers [PDF]

The Astrophysical Journal, 2002
This revised version has 37 pages, 13 figures, 4 tables; submitted to ApJ; for associated software package, see http://vassun.vassar.edu/~lombardi/mmas/ This revised version presents additional comparisons with SPH results and slightly improved merger ...
James C. Lombardi, Jessica S. Warren, Jessica S. Warren, Alison Sills, Alison Sills, Aaron R. Warren, Aaron R. Warren, Frederic A. Rasio, Frederic A. Rasio   +8 more
openaire   +2 more sources