Results 41 to 50 of about 10,395 (161)

SPGCam: A specifically tailored camera for solar observations

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Designing a new astronomical instrument typically challenges the available cameras on the market. In many cases, no camera can fulfill the requirements of the instrument in terms of photon budget, speed, and even interfaces with the rest of the ...
David Orozco Suárez   +41 more
doaj   +1 more source

Bibliography, catalogs, pixel data: Management of heterogeneous Big Data at CDS by the documentalists

open access: yesEPJ Web of Conferences, 2018
High speed Internet and the evolution of data storage space in terms of cost-effectiveness has changed the way data are managed today. Large amounts of heterogeneous data can now be visualized easily and rapidly using interactive applications such as ...
Buga M.   +5 more
doaj   +1 more source

Efficient Astronomical Data Condensation Using Approximate Nearest Neighbors

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2019
Extracting useful information from astronomical observations represents one of the most challenging tasks of data exploration. This is largely due to the volume of the data acquired using advanced observational tools.
Łukasik Szymon   +5 more
doaj   +1 more source

A Brief Review of Unsupervised Machine Learning Algorithms in Astronomy: Dimensionality Reduction and Clustering

open access: yesUniverse
This review investigates the application of unsupervised machine learning algorithms to astronomical data. Unsupervised machine learning enables researchers to analyze large, high-dimensional, and unlabeled datasets and is sometimes considered more ...
Chih-Ting Kuo, Duo Xu, Rachel Friesen
doaj   +1 more source

AGB Stars and Their Circumstellar Envelopes: An Operative Approach to Computing Their Atmospheres

open access: yesUniverse, 2021
The study of AGB stars necessarily covers a wide range of topics, from the primary astronomical observations to their interpretation in terms of fundamental physics.
Lucio Crivellari   +2 more
doaj   +1 more source

The Analysis of the Relation between virgo and leo in a Verse of Nezami [PDF]

open access: yesمتن شناسی ادب فارسی, 2013
Nezami Ganjavi is one of the famous figures of Persian poetry whose poetry has been considered to need commentary and interpretation for a long time. One of the reasons of complexity in his poems is the precise usage of astronomical terms and imagery ...
a Heydari
doaj  

Bayesian Estimation of Past Astronomical Frequencies, Lunar Distance, and Length of Day From Sediment Cycles

open access: yesGeochemistry, Geophysics, Geosystems
Astronomical 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
doaj   +1 more source

Estimation of Reliability Function for Complete Data - Article Review [PDF]

open access: yesالمجلة 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
doaj   +1 more source

Exploring the current issues of public astronomical observatories in Wakayama Prefecture : A case study of Kimino Town Misato Astronomical Observatory and Kawabe Astronomical Observatory [PDF]

open access: yes
In recent years, museums in Japan have been required to operate in two aspects: as public facilities, with an education especially for local residents and tourism attraction. In this paper, a qualitative study using interviews and secondary data research
アキヤマ, ヒロアキ   +17 more
core   +1 more source

An Improved Infrared/Visible Fusion for Astronomical Images

open access: yesAdvances 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
doaj   +1 more source

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