Search results for "Times"
showing 10 items of 182 documents
Modeling and querying facts with period timestamps in data warehouses
2019
Abstract In this paper, we study various ways of representing and querying fact data that are time-stamped with a time period in a data warehouse. The main focus is on how to represent the time periods that are associated with the facts in order to support convenient and efficient aggregations over time. We propose three distinct logical models that represent time periods as sets of all time points in a period (instant model), as pairs of start and end time points of a period (period model), and as atomic units that are explicitly stored in a new period dimension (period∗ model). The period dimension is enriched with information about the days of each period, thereby combining the former tw…
On the development of a communication-aware task mapping technique
2004
Clusters have become a very cost-effective platform for high-performance computing. In these systems, although currently existing networks actually provide enough bandwidth for the existing applications and workstations, the trend is towards the interconnection network becoming the system bottleneck. Therefore, in the future, scheduling strategies will have to take into account the communication requirements of the applications and the communication bandwidth that the network can offer. One of the key issues in these strategies is the task mapping technique used when the network becomes the system bottleneck.In this paper, we propose a communication-aware mapping technique that tries to mat…
Distributed GNSS-Based Time Synchronization and Applications
2016
The paper deals with synchronization standards, applications and challenges in the modern packet switched telecommunication networks. In recent years, the number of time-dependent services and systems only increases with the development of such areas as Internet of Things (IoT), industrial Internet, remote automation and robotics, precise positioning etc. In the paper, these emerging applications are discussed. An alternative way to the traditional centralized synchronization infrastructure is proposed. Compact and low-priced devices equipped with a Global Navigation Satellite System (GNSS) receiver and a reliable internal clock can be installed specifically in the places where they are nee…
Bright Blue Phosphorescence from Cationic Bis-Cyclometalated Iridium(III) Isocyanide Complexes
2012
We report new bis-cyclometalated cationic indium(III) complexes [((CN)-N-boolean AND)(2)Ir(CN-tert-Bu)(2)](CF3SO3) that have tert-butyl isocyanides as neutral auxiliary ligands and 2-phenylpyridine or 2-(4'-fluoropheny1)-R-pyridines (where R is 4-methoxy, 4-tert-butyl, or 5-trifluoromethyl) as (CN)-N-boolean AND ligands. The complexes are white or pale yellow solids that show irreversible reduction and oxidation processes and have a large electrochemical gap of 3.58-3.83 V. They emit blue or bluegreen phosphorescence in liquid/solid solutions from a cyclometalating-ligand-centered excited state. Their emission spectra show vibronic structure with the highest-energy luminescence peak at 440-…
Reclutamiento y reclutas en la ciudad de Valencia (1717-1762)
2019
This research aims to analyze recruitment by quintas, Spanish word for recruitment levies by lot, in the city of Valencia and the townships included in its jurisdictional area. The analyzed period began in 1717 with the first levie decreted by king Philip V once the War of Spanish Succession was over. Applied this levie in the kingdom of Valencia, this was the first application of levies by lot. The closing year for the reported period up to 1762, whith the last levy made by king Charles III before the establishment of the annual periodicity for the recruitment process. Procedures with which human contingents claimed to the city of Valencia between the mentioned dates were organized and dis…
La semilla sembrada: el potencial transformador de la justicia transicional y la restitución de tierras a mujeres en Colombia
2015
Esta tesis pone de relevancia la oportunidad que presentan las políticas de justicia transicional, en países que sufren o han sufrido violaciones sistemáticas de derechos humanos, para mostrar mediante sus mecanismos de Verdad, Justicia y Reparación, las causas estructurales de la violencia y sentar las bases para transformarlas. Así, el fin de esta investigación es clarificar si la justicia transicional debe y puede contribuir a generar condiciones de justicia social para los grupos sociales históricamente discriminados que han sido, por ello, víctimas de un conflicto armado generando así Garantías de No Repetición de la violencia. El estudio se contextualiza en el proceso de construcción …
Maailman ainoa toivo rauhasta ja edistyksestä : Kansainliitto-kysymys New York Timesin pääkirjoituksissa vuosina 1918-1920
2015
Kansainvälinen rauhanjärjestö Kansainliitto perustettiin ensimmäisen maailmansodan jälkeen Pariisin rauhankonferenssissa, ja virallisesti se aloitti toimintansa vuonna 1920. Yhdysvallat ei koskaan liittynyt Kansainliiton jäseneksi, vaikka sen rooli järjestön perustamisessa oli merkittävä. Kiistaa Kansainliittoon liittymisestä pidetään yhtenä Yhdysvaltain historian suurista poliittisista taisteluista. Työssä tutkittiin diskurssianalyysin avulla johtavan yhdysvaltalaisen sanomalehden New York Timesin käsityksiä Kansainliitto-kysymyksestä. Aineisto koostui lehden pääkirjoituksista marraskuusta 1918 heinäkuuhun 1920. Tavoitteena oli selvittää, missä diskursseissa Kansainliitto-kysymys esitettii…
Characterization of the main land processes occurring in Europe (2000-2018) through a MODIS NDVI seasonal parameter-based procedure
2021
Trabajo desarrollado bajo la financiación del proyecto “Soil Hydrology research platform underpinning innovation to manage water scarcity in European and Chinese cropping Systems” (773903), coordinado por José Alfonso Gómez Calero, investigador del Instituto de Agricultura Sostenible (IAS).
Dependence of two-proton radioactivity on nuclear pairing models
2017
Sensitivity of two-proton emitting decay to nuclear pairing correlation is discussed within a time-dependent three-body model. We focus on the $^6$Be nucleus assuming $\alpha + p + p$ configuration, and its decay process is described as a time-evolution of the three-body resonance state. For a proton-proton subsystem, a schematic density-dependent contact (SDDC) pairing model is employed. From the time-dependent calculation, we observed the exponential decay rule of a two-proton emission. It is shown that the density dependence does not play a major role in determining the decay width, which can be controlled only by the asymptotic strength of the pairing interaction. This asymptotic pairin…
Absence of long-term effects of reproduction on longevity in the mouse model.
2014
Background Most human demographic data, particularly those on natural fertility populations, find no relationship or even a positive association between fertility and longevity. The present study aims to ascertain whether there is a trade-off between fertility and longevity in the mouse model. Methods The study was focused on the first litter produced by 10- to 14-wk-old hybrid (C57BL/6JIco female X CBA/JIco male) mice. A single female/male per litter was individually housed with a male/female at the age of 25 and 52 wk, respectively, until the end of reproductive life in females or natural death in males under controlled housing conditions. Post-reproductive females and virgin mice were re…