Results 21 to 30 of about 1,487 (218)

SSTRED: Data- and metadata-processing pipeline for CHROMIS and CRISP

, 2021
Context. Data from ground-based, high-resolution solar telescopes can only be used for science with calibrations and processing, which requires detailed knowledge about the instrumentation.
Hillberg, Tomas,, Löfdahl, Mats G.,, Oleksii Andriienko, Hillberg, Tomas, Scharmer, Göran B.,, de la Cruz Rodriguez, Jaime, Haugan, Stein Vidar Hagfors, Fredvik, Terje, Scharmer, Göran B., Tomas Hillberg, Andriienko, Oleksii,, Löfdahl, Mats G., de la Cruz Rodríguez, Jaime,, Vissers, Gregal Joan Maria, Jaime de la Cruz Rodríguez, Gregal Vissers, Göran B. Scharmer, Mats G. Löfdahl, Stein V. H. Haugan, Andriienko, Oleksii, Haugan, Stein V. H., Terje Fredvik, Vissers, Gregal,   +22 more
core   +1 more source

A Novel Optimized Local Linearization Hybrid Block Method for Chaotic Systems: Applications to Stretch‐Twist‐Fold Flow and Bond Orbital Chaotic Attractors

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT The numerical approximation of nonlinear chaotic differential systems, such as the modified stretch‐twist‐fold (STF) flow and multi‐bond chaotic attractors, presents a significant challenge due to their sensitive dependence on initial conditions and complex dynamics where analytical solutions are unattainable.
Shina Daniel Oloniiju, Anastacia Dlamini
wiley   +1 more source

NATO Advanced Study Institute on Optics in Astrophysics

, 2005
Astrophysics is facing challenging aims such as deep cosmology at redshift higher than 10 to constrain cosmology models, or the detection of exoplanets, and possibly terrestrial exoplanets, and several others.
Foy, Françoise Claude, Foy, Renaud
core   +1 more source

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source

Pupil slicer design for the NASA-NSF extreme precision Doppler spectrograph concept WISDOM [PDF]

, 2016
The WIYN Spectrograph for Doppler Monitoring (WISDOM) was a concept responding to NASA's solicitation for an extreme precision radial velocity instrument for the 3.5 meter WIYN telescope on Kitt Peak in Arizona.
Egan, Mark, Simcoe, Robert A., Furesz, Gabor, Gábor Fűrész, Mark Egan, Robert Simcoe   +5 more
core   +1 more source

Interactive Videos in Multimodal Listening Assessments: Examining Language Learners' Perspectives

TESOL Quarterly, EarlyView.
Abstract The academic success of international students who speak English as a second language (L2) hinges on their ability to effectively communicate and comprehend information in English, which requires well‐developed listening skills. Given that real‐world listening mostly involves processing both auditory and visual information, incorporating ...
Shanshan He, Ruslan Suvorov
wiley   +1 more source

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, EarlyView.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244Cm$$ {}^{244}\mathrm{Cm} $$ sources, and come with severe concerns on radiation safety and ...
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Statistics for Astrophysics: Methods and Applications of the Regression

, 2014
International audienceAstrostatistics is spreading through the field of astrophysics at an increasing pace. Astronomers realize that they can benefit from sophisticated tools to analyse their data, but they are not trained to this new way of thinking ...
Fraix-Burnet, Didier,, Valls-Gabaud, David   +1 more
core   +2 more sources

Vortex phase masks of topological charge 4 and higher with diamond subwavelength gratings [PDF]

, 2020
High contrast imaging at small inner working angles can be achieved using a vector vortex coronagraph in the focal plane of the telescope providing a helical phase ramp with a singularity at its center.
Vargas Catalán, Ernesto, Loicq, Jerôme, Habraken, Serge, Delacroix, Christian, Orban de Xivry, Gilles,, Karlsson, Mikael,, König, Lorenzo, Absil, Olivier, Loicq, Jérôme,, Habraken, Serge,, König, Lorenzo,, Absil, Olivier,, Karlsson, Mikael, Orban De Xivry, Gilles, Lobet, Michaël,, Delacroix, Christian,, Lobet, Michaël, Vargas Catalan, Ernesto,   +17 more
core   +1 more source

High/low temperature setups for submillimetric samples under various extreme conditions at the AILES beamline

Journal of Synchrotron Radiation, EarlyView.
Two complementary high‐ and low‐temperature experimental setups have been developed at the AILES beamline of Synchrotron SOLEIL to enable infrared and terahertz spectroscopy of submillimetric samples under extreme and well controlled pressure and temperature conditions (from 10 K to 600 K and from vacuum up to 100 GPa).
Cecilia Taverna, Kelly Rader, Jean Blaise Brubach, Alexandre Voute, Mariia Dronova, Laurent Couillard-Labonnote, Quentin Libois, Pascale Roy, Marine Verseils   +8 more
wiley   +1 more source