Results 41 to 50 of about 15,745 (298)

RAMSES-yOMP: Performance Optimizations for the Astrophysical Hydrodynamic Simulation Code RAMSES

The Astrophysical Journal
Developing an efficient code for large, multiscale astrophysical simulations is crucial in preparing for the upcoming era of exascale computing. RAMSES is an astrophysical simulation code that employs parallel processing based on the message-passing ...
San Han, Yohan Dubois, Jaehyun Lee, Juhan Kim, Corentin Cadiou, Sukyoung K. Yi   +5 more
doaj   +1 more source

Accelerated and Energy-Efficient Galaxy Detection: Integrating Deep Learning with Tensor Methods for Astronomical Imaging

Universe
Addressing the astronomical challenges posed by the interplay of data volume, AI sophistication, and energy consumption is crucial for the future of astronomy. As astronomical surveys continue to produce vast amounts of data, the computational and energy
Humberto Farias, Guillermo Damke, Mauricio Solar, Marcelo Jaque Arancibia   +3 more
doaj   +1 more source

Chip‐Integrated Metasurface‐GaAsSb Nanowire Array Photodetectors for Single‐Pixel Polarimetric Imaging

Advanced Optical Materials, EarlyView.
A 2×2 multiplexed GaAsSb nanowire photodetector array integrated with L‐shaped metasurfaces is developed for miniaturized infrared polarimetry. Leveraging non‐radiating anapole states that facilitate near‐field enhancement, the device demonstrates strong polarization selectivity at 835 nm.
Longsibo Huang, Ziyuan Li, Yitao Yang, Yang Yu, Lei Xu, Li Li, Songqin Zhang, Han Wang, Wenwu Pan, Chaohao Chen, Weiqi Jin, Wen Lei, Lorenzo Faraone, Chennupati Jagadish, Lan Fu   +14 more
wiley   +1 more source

Galaxy And Mass Assembly (GAMA) : galaxy close pairs, mergers and the future fate of stellar mass

, 2014
ASGR acknowledges STFC and SUPA funding that were used to do this work. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO and the participating institutions.We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift
De Propris, R., De Propis, R., T McNaught-Roberts (16161611), Pimbblet, K. A., A Moffett (7731959), Driver, S. P., M S Owers (16161563), Lara-Lopez, M. A., A M Hopkins (16143587), Lopez-Sanchez, Angel R., B W Holwerda (16219943), Jonathan Loveday (4460899), Owers, M. S., R De Propris (16161587), Obreschkow, D., Holwerda, Benne W., M Cluver (16191152), Baldry, I. K., J Bland-Hawthorn (16111139), Davies, L. J. M., Bauer, A. E., E N Taylor (16143620), Brown, M. J. I., A S G Robotham (16143614), M A Lara-Lopez (16161575), A E Bauer (16161566), Hopkins, A. M., E van Kampen (16112642), Brough, S., Loveday, J., McNaught-Roberts, T., I K Baldry (16072595), Moffett, A., Liske, J., Wilkins, S. M., P Norberg (16143575), Holwerda, B. W., Mahajan, S., L S Kelvin (16143602), K Pimbblet (16191149), Penny, S. J., Robotham, A. S. G., van Kampen, E., M Prescott (10000280), M J Drinkwater (16091732), Bland-Hawthorn, J., N K Agius (16219940), Agius, N. K., Prescott, M., M J I Brown (16143632), Cluver, M., Drinkwater, M. J., S J Penny (16219955), Taylor, E. N., Stephen Wilkins (4461910), Lopez-Sanchez, A. R., D Obreschkow (16219952), S Brough (16143590), S Mahajan (16219949), L J M Davies (16219937), Norberg, P., J Liske (7814738), Kelvin, L. S., Pimbblet, K., S P Driver (16143581), A R López-Sánchez (16219946)   +65 more
core   +1 more source

Multisegment Overlap–Save Method for Coherent Dedispersion

The Astronomical Journal
Dispersion occurs due to the interstellar medium, which functions as a prism and causes different time delays in radio waves of varying frequencies. The coherent dedispersion technique is often used in pulsar and fast radio burst observations to mitigate
Chenye Zhou, Qiao Meng, Wei Liu, Shaocong Guo, Hailong Zhang, Gaojing Li   +5 more
doaj   +1 more source

Fitting a function to time-dependent ensemble averaged data

Scientific Reports, 2018
Time-dependent ensemble averages, i.e., trajectory-based averages of some observable, are of importance in many fields of science. A crucial objective when interpreting such data is to fit these averages (for instance, squared displacements) with a ...
Karl Fogelmark, Michael A. Lomholt, Anders Irbäck, Tobias Ambjörnsson   +3 more
doaj   +1 more source

Waveguide Geometry–Driven Trade‐Offs in Resonant Cavity Sensor Performance

Advanced Optical Materials, EarlyView.
Waveguide geometry governs the interplay between sensitivity, intrinsic Q‐factor, and wavelength noise in silicon nitride resonant sensors. Contrary to intuition, higher sensitivity does not ensure superior performance. Low‐noise, high‐Q ridge resonators achieve the lowest detection limits, revealing that detection is ultimately constrained by noise ...
Mohammad Talebi Khoshmehr, Bakiye Imran Akca, Mateusz Słowikowski, Drecka Dagmara, Marcin Juchniewicz, Ryszard Piramidowicz, Muhammad Ali Butt   +6 more
wiley   +1 more source

Introduction to methods of approximation in physics and astronomy

, 2017
This textbook provides students with a solid introduction to the techniques of approximation commonly used in data analysis across physics and astronomy.
van Putten, Maurice H P M, Maurice H. P. M. van Putten   +1 more
core   +1 more source

Interactive Computer Programs for Teaching Astronomy [PDF]

International Astronomical Union Colloquium, 1990
Astronomy is the most popular and oldest of all sciences and it has had profound influence on human thought. Unfortunately, astronomy does not find an appropriate place in our school-college syllabi. This may be due to the fact that teaching of astronomy encounters a large number of problems with regard to visualization and practical experiments ...
S.R. Prabhakaran Nayar, Rebecca T. Thomas   +1 more
openaire   +1 more source

Helical Electron Beam Micro‐Bunching by High‐Order Modes in a Micro‐Plasma Waveguide

Advanced Science, EarlyView.
ABSTRACT Electron acceleration by a high‐power Laguerre‐Gaussian pulse in a micro‐plasma waveguide is investigated. When the incident laser travels in the waveguide, electrons on the wall are extracted into the vacuum core and accelerated by the longitudinal field of the waveguide mode.
Xingju Guo, Longqing Yi
wiley   +1 more source