Results 61 to 70 of about 5,119,857 (297)
Geochemistry, Geophysics, GeosystemsAstronomical cycles recorded in stratigraphic sequences offer a powerful data source to estimate Earth's axial precession frequency k, as well as the frequency of rotation of the planetary perihelia (gi) and of the ascending nodes of their orbital planes
A. Malinverno, S. R. Meyers
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Estimation of Reliability Function for Complete Data - Article Review [PDF]
المجلة العراقية للعلوم الاحصائية, 2019 The theory of reliability is one of the important theories that is attracting great interest in many researchers at present because of its importance in various fields of life especially in determining the age of a particular device and its efficiency ...
Shaimaa Waleed
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LONG-TERM CALIBRATION STABILITY OF A RADIO ASTRONOMICAL PHASED ARRAY FEED
The Astronomical Journal, 2012 There are many challenges associated with the implementation of a phased array feed for radio astronomy applications. Among these is the need to have an adequate set of calibration measurements so that reliable beamformers can be computed. Changes in the operating environment and temporal gain drift in the electronics contribute to calibration drift ...
Michael Elmer +2 more
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Observations of the Hydroxyl Radical in C/2013 US10 (Catalina) at 18 cm Wavelength
, 2017 The hydroxyl (OH) radical produced by photodissociation of water molecule is one of the most important indicators for cometary outgassing activity. The absorption lines of the OH radical at 1665 and 1667 MHz in the coma of comet C/2013 US10 Catalina were
Ip,Wing-Huen +10 more
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Advanced Materials, EarlyView.Co1/3TaS2${\rm Co}_{1/3}{\rm TaS}_{2}$ hosts a triple‐Q noncoplanar antiferromagnetic state with coexisting Z3${\rm Z}_3$ electronic nematicity. We report rotational hysteresis observed in both magnetoresistance and magnetic torque, revealing strongly pinned in‐plane weak ferromagnetic moments in the triple‐Q phase and the magnetism‐driven nature of ...
Joonyoung Choi +5 more
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An astronomical question answering dataset for evaluating large language models
Scientific DataLarge language models (LLMs) have recently demonstrated exceptional capabilities across a variety of linguistic tasks including question answering (QA).
Jie Li +8 more
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An Improved Infrared/Visible Fusion for Astronomical Images
Advances in Astronomy, 2015 An undecimated dual tree complex wavelet transform (UDTCWT) based fusion scheme for astronomical visible/IR images is developed. The UDTCWT reduces noise effects and improves object classification due to its inherited shift invariance property.
Attiq Ahmad +3 more
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REMARKS ON STAR TERMINOLOGY IN THE PYRAMID TEXTS "Analytical Study in the Linguistic and Orthographic Structure of the Star Terms" [PDF]
International Journal of Multidisciplinary Studies in Heritage ResearchThe theme of this research aims to investigate and study the terminology of stars in the ancient Egyptian Language through an analytical study of the linguistic and orthographic structure of the star terms in the Old Egyptian language stage, this will be
Tamer Essa +3 more
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Elasticity‐Driven Periodic Polarization Patterns in a Chiral Ferroelectric Nematic Fluid
Advanced Materials, EarlyView.Chiral polar ferroelectric nematic fluids exhibit spontaneous formation of stripe, square, and hexagonal polarization textures under confinement. Controlled by thickness and anchoring, these patterns produce spatially modulated nonlinear optical responses.
Anej Sterle +11 more
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Utilization of Image Intensifiers in Astronomy
Acta Polytechnica, 2012 In this paper we present the properties of image intensifiers, used together with fast TV cameras for astronomical purposes within the MAIA project(Meteor Automatic Imager and Analyser, primarily focused on observing meteoric events with high time ...
S. Vítek +3 more
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