Results 141 to 150 of about 5,320,922 (369)
Analysis of the astroclimate parameters associated with the tropospheric conditions and their time evolution at Roque de Los Muchachos Observatory [PDF]
, 2012 The early 1970's saw the start of a new era in astronomy with the rst approach to building large telescopes (2 to 5 meters class telescope) and locating them in the right places.
GUERRA-RAMON, JUAN,CARLOS +1 more
core
A Multirate Variable-timestep Algorithm for N-body Solar System Simulations with Collisions
, 2016 We present and analyze the performance of a new algorithm for performing accurate simulations of the solar system when collisions between massive bodies and test particles are permitted. The orbital motion of all bodies at all times is integrated using a
Sharp, Philip, Newman, WI
core +1 more source
Advanced Science, EarlyView.A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim +8 more
wiley +1 more source
The SPHEREx Sky Simulator: Science Data Modeling for the First All-sky Near-infrared Spectral Survey
The Astrophysical Journal Supplement SeriesWe describe the SPHEREx Sky Simulator (henceforth the Simulator), a software tool designed to model science data for NASA’s SPHEREx mission that will carry out a series of all-sky spectrophotometric surveys at ∼6″ spatial resolution in 102 spectral ...
Brendan P. Crill +32 more
doaj +1 more source
The Observational Signatures of Cosmic Strings
, 2009 Cosmic strings were postulated by Kibble in 1976 and, from a theoretical point of view, their existence finds support in modern superstring theories, both in compactification models and in theories with extended additional dimensions.
Riccio, Giuseppe
core
Frontiers in Earth Science, 2019 Multiple cascading hazards triggered by the 2018 Sulawesi, Indonesia, earthquake caused various compounding consequences. A major strike-slip fault movement with along-dip components resulted in intense ground shaking, liquefaction and lateral spreading,
K. Goda +5 more
semanticscholar +1 more source
Advanced Science, EarlyView.The symmetry‐driven coexistence of altermagnetism and (anti)ferroelectricity in perovskites shows a strong dimensional dependence. Upon reducing the system from bulk to the two‐dimensional limit, only C‐type antiferromagnetic order retains ferroelectrically switchable altermagnetism, whereas A‐ and G‐type orders become conventional antiferromagnets ...
Zhou Cui +6 more
wiley +1 more source
Converged Simulations of the Nozzle Shock in Tidal Disruption Events
The Astrophysical Journal LettersA star experiences a tidal disruption event (TDE) after passing too close to a massive black hole. When the debris returns to pericenter on the second passage, it is compressed, leading to the formation of nozzle shocks (in the orbital plane) and pancake
Fangyi (Fitz) Hu +3 more
doaj +1 more source
Simulations of normal spiral galaxies [PDF]
, 2003 Results from numerical simulations of normal isolated late-type spiral galaxies are presented; specifically, the galaxy NGC 628 is used as a template. The method employs a TREESPH code including stellar particles, gas particles, cooling and heating of ...
Bottema, Roelof, Roelof Bottema
core +1 more source
Advanced Science, EarlyView.Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen +6 more
wiley +1 more source