Search results for "ASTER"
showing 10 items of 2223 documents
Lietotāja definētu funkciju slodzes vienmērīga sadalīšana “Cassandra” datu bāzes klasterī
2016
Pēdējos gados strauji palielinās datu apjomi, kas ir jāanalizē. Darbā tiek pētīta iespēja vienmērīgi noslogot Cassandra datu bāzes klasteri, ja tanī tiek izmantotas lietotāja definētās funkcijas (LDF), kuras rada procesora slodzi. Lietotājs var uzrakstīt LDF ar dažādu izpildes laika sarežģītību. Katra no LDF var apstrādāt datus ar dažādu izmēru. Rezultātā atsevišķi klastera mezgli var tikt pārslogoti, kamēr pārējie ir brīvi. Pētījuma mērķis ir izstrādāt un veikt praktiskus eksperimentus slodzes vienmērīgas sadalīšanas algoritmam, kas noteiktu Cassandra klastera mezgla aizņemtības ilgumu, ja kopā ar LDF tiek izpildīti lasīšanas vaicājumi. No eksperimentu rezultātiem secināms, ka piedāvāto ri…
Aplicaciones de la embriogénesis somática para la propagación y mejora de Quercus ilex L. y Pinus spp.
2013
Esta tesis está enfocada a la aplicación de la embriogénesis somática para la conservación y mejora de Quercus ilex L., Pinus pinaster Aiton y Pinus pinea L., especies forestales representativas de los bosques de la Península Ibérica. La propagación clonal mediante embriogénesis somática (ES) es la herramienta más adecuada para la propagación de genotipos de élite y para la implementación de la llamada silvicultura multivarietal. Además los cultivos embriogénicos son explantos adecuados para iniciar experimentos de transformación genética con vistas a la introducción de características de interés o para estudios de genómica funcional. Quercus ilex (encina) es una de las especies más represe…
Il diritto umano a un alloggio adeguato nei processi di ricostruzione a seguito di disastri naturali e di conflitti armati
2011
Stereoselective Synthesis and Pharmacological Evaluation of 2,4-Bridged Piperidine Derivatives Designed to Activate the κ-Opioid Receptor
2021
Unique clockwork in photoreceptor of rat
2010
In mammals, the retina contains a clock system that oscillates independently of the master clock in the suprachiasmatic nucleus and allows the retina to anticipate and to adapt to the sustained daily changes in ambient illumination. Using a combination of laser capture micro-dissection and quantitative PCR in the present study, the clockwork of mammalian photoreceptors has been recorded. The transcript amounts of the core clock genes Clock, Bmal1, Period1 (Per1), Per3, Cryptochrome2, and Casein kinase Ie in photoreceptors of rat retina have been found to undergo daily changes. Clock and Bmal1 peak with Per1 and Per3 around dark onset, whereas Casein kinase Ie and Cryptochrome2 peak at night…
Unexplored nucleophilic ring opening of aziridines.
2010
The reactivity of dianions of carboxylic acids towards aziridines has been studied. Although, a similar reactivity to that of enolates from ketones, esters or amides has been observed, the method directly yields g-aminoacids in one step. The method is complementary of previous results of enenediolate reactivity with other electrophiles. A comparative study with the reactivity of this enediolates with epoxides is included.
Efficient Conversion of Light to Chemical Energy : Directional, Chiral Photoswitches with Very High Quantum Yields
2020
Abstract Photochromic systems have been used to achieve a number of engineering functions such as light energy conversion, molecular motors, pumps, actuators, and sensors. Key to practical applications is a high efficiency in the conversion of light to chemical energy, a rigid structure for the transmission of force to the environment, and directed motion during isomerization. We present a novel type of photochromic system (diindane diazocines) that converts visible light with an efficiency of 18 % to chemical energy. Quantum yields are exceptionally high with >70 % for the cis–trans isomerization and 90 % for the back‐reaction and thus higher than the biochemical system rhodopsin (64 %). T…
On the use of unmanned aerial systems for environmental monitoring
2018
[EN] Environmental monitoring plays a central role in diagnosing climate and management impacts on natural and agricultural systems; enhancing the understanding of hydrological processes; optimizing the allocation and distribution of water resources; and assessing, forecasting, and even preventing natural disasters. Nowadays, most monitoring and data collection systems are based upon a combination of ground-based measurements, manned airborne sensors, and satellite observations. These data are utilized in describing both small-and large-scale processes, but have spatiotemporal constraints inherent to each respective collection system. Bridging the unique spatial and temporal divides that li…
Apokalipsa spełniona: casus epidemii AIDS
2020
Disasters are hardly ever unequivocal. Any attempt to sort them out remains a forever open task. A natural part of everyday life in the past, disasters have been reinvented by the modern world as a challenge that essentially needs to be eliminated from public life. Due to the dramatic expansion of humans and human activity, one can hardly call them ‘natural’ anymore. This article focuses on disasters and their significant culture-forming potential, discussing it primarily on the example of the AIDS epidemic. With this new epidemic, the catastrophic vision of history was rekindled and a specific (post-)apocalyptic social climate was created. AIDS, called the plague of the 20th century, reviv…
La fauna del pleistoceno inferior de la Sierra de Quibas (Abanilla, Murcia)
1999
El yacimiento kárstico cuaternario de la Sierra de Quibas (Abanilla, Murcia) ha proporcionado una amplia lista faunística constituida por 53 especies repartidas entre gasterópodos, miriápodos, anfibios, reptiles, aves y mamíferos. En el conjunto de los gasterópodos destaca Palaeoglandina, un género que se extingue en el resto de Europa durante el Plioceno y que se mantiene como relicto en el Pleistoceno de la Península Ibérica. Dos de las especies de aves determinadas, Gypaetus barbatus y Gerontieus eremita, y una de las serpientes, Elaphe cf. E. sealaris, apenas se hallan representadas en el registro fósil. Hay además varias especies de aves cuya aparición en Quibas supone la primera cita …