Search results for "convers"
showing 10 items of 1092 documents
Multicolor Up-Conversion Luminescence in Rare-Earth Doped NaLaF4
2011
In this work we tried to achieve multicolor up-conversion luminescence in low phonon energy material NaLaF4 doped with different Er3+ Tm3+ and Yb3+ concentrations. Up-conversion luminescence was measured and main luminescence bands from Er3+ and Tm3+ in red, green and blue spectral regions were observed. The relative intensities of the luminescence bands could be changed by changing the doping levels of rare-earth ions. Changes in the up-conversion luminescence color could be achieved by applying different infrared pump power density. The color coordinates of the multicolor up-conversion luminescence depending on doping level as well as on the pump power density were presented in CIE (x, y)…
Two-Dimensional Assembling of (2,2‘-Bipyrimidine)bis(oxalato)chromate(III) Units through Alkaline Cations
1999
Self-assembling of the tris-chelated [Cr(bpm)(ox)2]- complex with Na+ in aqueous solution leads to the remarkable bimetallic honeycomb layered compound of formula [NaICrIII(bpm)(ox)2]·5H2O (2) (bpm...
Extended View Angle Integral Imaging 3D Display using Smart Pseudoscopic-to-orthoscopic Conversion with Head Tracking
2016
We overview a head tracking integral imaging display using the smart pseudoscopic-to-orthoscopic conversion method. The crosstalk for a large viewing angle in integral imaging is eliminated by generating a new set of elemental images.
Multiple-Planes Pseudoscopic-to-Orthoscopic Conversion for 3D Integral Imaging Display
2015
In this paper, we propose an advanced pseudoscopic-to-orthoscopic conversion method for 3D integral imaging display systems. Compared to previous works, this method can generate more accurate images for orthoscopic 3D display using multiple reference planes and estimated depth information. 3D display results show the superiority of the proposed pseudoscopic-to-orthoscopic conversion method.
Primacía epistémica en géneros interaccionales: atenuación, intensificación y territorio
2018
En la última década, ha surgido dentro del Análisis Conversacional una corriente teórica en torno al concepto de primacía epistémica en interacción, dentro de la cual se concibe la transmisión de información como una cuestión de territorio. En este trabajo, se analizan secuencias de aserciónacuerdo en conversaciones y entrevistas con el fin de mostrar que los mecanismos de atenuación e intensificación empleados por los hablantes funcionan como huellas de la interpretación que hacen los interlocutores de la situación en términos de posicionamiento epistémico. Se argumenta que existen casos de congruencia epistémica –cuando los interlocutores convergen en su interpretación de la situación– y …
Interaktion im Fremdsprachenuntericht. Beiträge aus der empirischen Forschung.
2017
Der vorliegende Band versammelt 9 Aufsätze, WELCHE die Interaktion im Fremdsprachenunterricht von der Schule bis zur Hochschule EMPIRISCH erforschen UND DETAILLIERT DARSTELLEN. Die Beiträge beschreiben Gesprächsstrukturen im Englisch-, Deutsch-, Französisch, Türkisch- und Dänischunterricht und wenden dabei UNTERSCHIEDLICHE Methoden WIE Z.B. DIE Konversationsanalyse ODER DIE multimodalen Interaktionsanalyse an. DAMIT GIBT DER SAMMELBAND EINEN SPANNENDEN UND ZUGLEICH FACETTENREICHEN EINBLICK IN DEN ALLTAG DES FREMDSPRACHENUNTERRICHTS UND DIE KONKRETE PRAXIS UNTERRICHTLICHEN HANDELNS.
Advanced Monitoring Systems Based on Battery-Less Asset Tracking Modules Energized through RF Wireless Power Transfer
2020
Asset tracking involving accurate location and transportation data is highly suited to wireless sensor networks (WSNs) featuring battery-less nodes that can be deployed in virtually any environment and require little or no maintenance. In response to the growing demand for advanced battery-less sensor tag solutions, this article presents a system for identifying and monitoring the speeds of assets in a WSN with battery-less tags that receive all their operating energy through radio frequency (RF) wireless power transfer (WPT) architecture, and a unique measurement approach to generate time-domain speed readouts. The assessment includes performance characteristics and key features of a syste…
Intersystem Crossing and Light-Induced Bistability in Iron(?) Spin-Crossover Compounds
1996
Abstract The dynamics of the high-spin→low-spin intersystem crossing process in iron(?) spin-crossover compounds are strongly influenced by cooperative effects of elastic origin which are due to the large difference in volume between high-spin and low-spin complexes. The deviation from first order kinetics is attributed to a build-up of an internal pressure as the relaxation proceeds, leading to a characteristic self-acceleration. The elastic interactions may lead to a light-induced bistability for systems which otherwise remain in the high-spin state down to cryogenic temperatures.
Polyhedral Oligomeric Silsesquioxane Based Catalyst for the Efficient Synthesis of Cyclic Carbonates
2015
In this work, the synthesis of a novel imidazolium-based polyhedral oligomeric silsesquioxane (POSS-mim-Cl) material is presented. The new nanometer-size organosilica based compound was employed for chemical fixation of CO2 into epoxide under homogeneous conditions. The target reaction was represented by the obtention of cyclic carbonates starting from epoxides and CO2. Particularly, styrene oxide was chosen as reference substrate. In addition, different parameters (solvent, temperature, pressure of CO2, and mass of the catalyst) were modified to find the best condition for CO2 conversion. The catalyst POSS-mim-Cl displayed good catalytic performances, the best results being obtained at 40 …