Search results for "ASTER"
showing 10 items of 2223 documents
Astrometry and photometry of digitized plates of Baldone Schmidt telescope
2021
Abstract During the 40-year photographic period of astronomical observations, the Baldone Astrophysical Observatory has accumulated more than 22,000 direct and 2,500 spectral images. In 2018, the digitization of direct astrophoto images with a resolution of 1200 dpi was completed. A processing methodology for obtaining the equatorial coordinates and photometric characteristics of the objects recorded in digitized astronegatives using the LINUX/MIDAS/ROMAFOT environment has been developed at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. Program package with success already works in seven observatories. A description of the operation of this program complex…
Astronomy and space on the big screen : how accurately has cinema portrayed space travel and other astrophysical concepts?
2016
"Since its origins, cinema has been fascinated with the subject of scientific developments. In particular, astronomy and astrophysics have played an important role in science fiction stories about space travel and exploration. Though the science has not always been accurately represented, in the last decades there has been more and more interest from the cinema industry in approaching scientists to make sure that the stories and concepts shown in films are closer to our true understanding of the universe. In this article, I will explore how cinema has portrayed astrophysical concepts throughout the decades, and how sometimes cinema has even inspired the direction of scientific research."
Asteroīdu rotācijas perioda noteikšana
2022
Darba mērķis ir izveidot programmu, ar kuras palīdzību var iegūt asteroīda rotācijas periodu no spožuma mērījumiem laikā. Lai to izdarītu, ir jāveic sekojošie uzdevumi: jāizveido programma ar Lomb-Scargle metodi un uz Furjē rindas balstītu metodi, kuras savā starpā jāsalīdzina, jāizveido indikators, kas nosaka no spožuma līknes noteiktā perioda ticamību, jātestē izveidotā programma un indikators izmantojot kataloga datus, ko ieguvuši citi autori, kā arī jātestē ar Baldones observatorijas iegūtajiem mērījumiem un jānovērtē abu metožu pielietošanas ierobežojumi un nosacījumi. Rezultātā Baldones observatorijas veiktajiem mērījumiem piemērotākā ir autora izveidotā programma, kas ir balstīta uz …
The role of melt composition on aqueous fluid vs. silicate melt partitioning of bromine in magmas
2018
International audience; Volcanogenic halogens, in particular bromine, potentially play an important role in the ozone depletion of the atmosphere. Understanding bromine behaviour in magmas is therefore crucial to properly evaluate the contribution of volcanic eruptions to atmospheric chemistry and their environmental impact. To date, bromine partitioning between silicate melts and the gas phase is very poorly constrained, with the only relevant experimental studies limited to investigation of synthetic melt with silicic compositions. In this study, fluid/melt partitioning experiments were performed using natural silicate glasses with mafic, intermediate and silicic compositions. For each co…
"Vaatimaton rakkaus on pelottava voima" : sosiaalityön, siihen liittyvien valintojen, muutoksen sekä arvojen ja kristillisen etiikan välisiä suhteita…
2006
Synthesis of recent stratigraphic data on bathonian to oxfordian deposits of the eastern Paris basin
2007
International audience
Essential oil from the aerial parts of Centaurea cuneifolia Sibth. & Sm. and C. euxina Velen., two species growing wild in Bulgaria
2009
Abstract The volatile constituents of the aerial parts of Centaurea cuneifolia Sibth. & Sm. and Centaurea euxina Velen. from Bulgaria were extracted by hydrodistillation and were analyzed. The main components in C. cuneifolia were β-eudesmol (26.5%) and hexadecanoic acid (17.6%). The main components in C. euxina were hexadecanoic acid (20.3%), spathulenol (10.8%) and caryophyllene oxide (6.2%). The chemotaxonomic significances with respect to other previously studied species of the same sections ( Achrolopus and Phalolepis , respectively) are discussed.
L'aura de la memòria. La imatge de Jaume I en la València baixmedieval (ca. 1338 - ca. 1538)
2022
La tesis doctoral indaga en el período inicial de gestación del recuerdo de Jaime I en la ciudad de Valencia, entre el primer y el tercer centenario de la fiesta de la conquista, en el marco de la cultura visual; es decir, del conjunto de manifestaciones figurativas y arquitectónicas, así como de actos performativos y objetos comunes que no se adaptan a la idea tradicional del arte. Establece un diálogo con los argumentos que ya han esgrimido historiadores y filólogos para definir cuál era el papel de las imágenes en la historia de la memoria del rey. Publica nueva documentación de archivo, relee las noticias ya exhumadas y, en definitiva, presenta la revisión de un tema –reconsidera la ima…
Big Data Applications for Disaster Management
2017
International audience; The term "disaster management" comprises both natural and man-made disasters. Highly pervaded with various types of sensors, our environment generates large amounts of data. Thus, big data applications in the field of disaster management should adopt a modular view, going from a component to nation scale. Current research trends mainly aim at integrating component, building, neighborhood and city levels, neglecting the region level for managing disasters. Current research on big data mainly address smart buildings and smart grids, notably in the following areas: energy waste management, prediction and planning of power generation needs (based on smart meter readings,…
Cytotoxic eudesmane sesquiterpenes from Crepis sancta
2019
Abstract Chemical exploration of Crepis sancta (L.) Bornm. (Asteraceae) aerial parts afforded two new eudesmane sesquiterpenes (1 and 2) together with three known congeners (3-5) and two known methylated flavonoids (6 and 7). Structure elucidation of the new compounds was unambiguously performed based on HRESIMS, 1D and 2D NMR spectroscopic analyses. All isolated compounds were subjected to an in vitro cytotoxicity assay against mouse lymphoma (L5178Y) cells, revealing moderate activities with IC50 ranging from 7.9 to 21.0 μM.