Results 11 to 20 of about 88,221 (286)

Newly found Mayan records of astronomical phenomena in Dresden Codex [PDF]

open access: yesSerbian Astronomical Journal, 2023
The rich culture of old Maya gave birth to a very complicated and complex calendar; they also recorded important historical events and many significant astronomical phenomena.
Vondrák J., Böhm V., Böhm B.
doaj   +1 more source

Images of the Saturn Hexagon before Voyager 1 [PDF]

open access: yesArchaeoastronomy and Ancient Technologies, 2021
In 1981 the Voyager 1 probe photographed – and later the Cassini probe confirmed – a hexagonal vortex on Saturn's North pole. This cloud features extends for almost 30,000 km keeping its shape unchanged as it rotates with the planet. But, since we see it
Ferreri W., Codebò M., Bubbi B.
doaj   +1 more source

Features of test of air-fuel system of gas turbine engine [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2018
The article is devoted to the problem of ensuring the operability of rotary bearings of a gas turbine engine (GTE) with an air-fuel lubrication system.
V. N. Klimov   +3 more
doaj   +1 more source

Radiometric receiving complex and ways to reduce the radiometric measurements error [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2015
The authors formulate criteria for building a structural scheme and developing design and technological solutions for a reception complex for full-power compensation radiometers.
Pylypenko A. M.   +4 more
doaj   +1 more source

The “SPectrogram Analysis and Cataloguing Environment” (SPACE) labelling tool

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The SPectrogram Analysis and Cataloguing Environment (SPACE) tool is an interactive python tool designed to label radio emission features of interest in a time-frequency map (called “dynamic spectrum”).
Corentin Louis   +9 more
doaj   +1 more source

Features of structural and technological solutions for receiving system of small radio telescopes [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2016
The article presents new technological solutions and structural approaches for design of radiometric receiving systems for small diameter antennas. Problems which need to be dealt with in the process of realization of such systems are formulated.
Gluschechenko E. N.   +4 more
doaj   +1 more source

Role of personality in scientific advancement (dedicated to the eightieth anniversary of the birth of Lev G. Gassanov) [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2016
The article is dedicated to Lev G. Gassanov who between 1974 and 1991 headed the "Saturn" Research Institute. Lev Gassanov was an outstanding personality, a talented leader, organizer and scholar, author of many books, scientific works and inventions, he
Glushechenko E. M., Narytnik T. N.
doaj   +1 more source

Monitoring the efficiency of microwave channels for receiving telemetry information using indirect parameters [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2021
The paper presents an analysis of existing methods of controlling the efficiency of multipart radio engineering systems and their individual components. The authors consider the situations when traditional methods do not allow controlling the efficiency ...
Chmil V. V.
doaj   +1 more source

Black saturn [PDF]

open access: yesJournal of High Energy Physics, 2007
48 pages, 35 figures. v2: clarifications + new discussion of two sectors of balanced solutions + corrections.
Henriette Elvang, Pau Figueras
openaire   +2 more sources

Eco-Efficient Quantification of Glucosinolates in Camelina Seed, Oil, and Defatted Meal: Optimization, Development, and Validation of a UPLC-DAD Method

open access: yesAntioxidants, 2022
Camelina sativa (camelina) seed, oil, and defatted meal are widely used for food, animal feed, and other purposes. The accurate quantification of camelina glucosinolates is critical as their functionalities are highly dose-dependent.
Salvador Meza   +7 more
doaj   +1 more source

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