Search results for "TG"
showing 10 items of 2275 documents
El espacio hermético en el primer modelo de film weimariano
1986
Análisis de la construcción espacial en el plano en el llamado expresionismo cinematográfico, en relación con el estatismo pictórico y la saturación plástica.
Astrobiology of life on Earth
2021
Astrobiology is mistakenly regarded by some as a field confined to studies of life beyond Earth. Here, we consider life on Earth through an astrobiological lens. Whereas classical studies of microbiology historically focused on various anthropocentric sub-fields (such as fermented foods or commensals and pathogens of crop plants, livestock and humans), addressing key biological questions via astrobiological approaches can further our understanding of all life on Earth. We highlight potential implications of this approach through the articles in this Environmental Microbiology special issue ‘Ecophysiology of Extremophiles’. They report on the microbiology of places/processes including low-te…
Vibrational circular dichroism studies of exceptionally strong chirality inducers in liquid crystals.
2021
7,7′-Disubstituted 2,2′-methylenedioxy-1,1′-binaphthyls are highly efficient chirality inducers in nematic liquid crystals. The absolute configuration of these compounds is, however, hard to determine as they only crystallize as racemic mixtures. In this work a Vibrational Circular Dichroism (VCD) study is reported that provides an unambiguous determination of the absolute configuration of these compounds. An in-depth General Coupled Oscillator (GCO) analysis of the source of the VCD signal reveals that the unusual structure of these binaphthyl compounds inherently leads to strong and robust VCD bands. Combined with linear transit calculations, our VCD studies allow for the determination of…
Vibrational circular dichroism spectroscopy for probing the expression of chirality in mechanically planar chiral rotaxanes
2020
Mechanically interlocked molecules can exhibit molecular chirality that arises due to the mechanical bond rather than covalent stereogenic units. Developing applications of such systems is made challenging by the absence of techniques for assigning the absolute configuration of products and methods to probe how the mechanical stereogenic unit influences the spatial arrangements of the functional groups in solution. Here we demonstrate for the first time that Vibrational Circular Dichroism (VCD) can be used to not only discriminate between mechanical stereoisomers but also provide detailed information on their (co)conformations. The latter is particularly important as these molecules are now…
De la pertinence de l'adjectif "étrangère" en Didactique des Langues-Cultures
2012
Les statuts traditionnellement attribués aux langues (ancienne/moderne, morte/vivante, maternelle/étrangère) continuent de remplir leurs fonctions : opposer, ordonner, identifier acteurs et spécialistes de chaque domaine. De leur côté, « Français Langue Etrangère » et « FLE », après des débuts difficiles, connaissent un succès tel que l’on oublie les idées qu’ils véhiculent et leur adaptation nécessaire à une diversité linguistique et culturelle croissante. Dans le contexte de l’apprentissage effectif et durable des langues-cultures du monde, impossible sans processus de familiarisation, la pertinence de l’adjectif « étrangère » est discutable. Accorder une valeur maximale aux qualificatifs…
Computer Vision on X-ray Data in Industrial Production and Security Applications: A Comprehensive Survey
2023
X-ray imaging technology has been used for decades in clinical tasks to reveal the internal condition of different organs, and in recent years, it has become more common in other areas such as industry, security, and geography. The recent development of computer vision and machine learning techniques has also made it easier to automatically process X-ray images and several machine learning-based object (anomaly) detection, classification, and segmentation methods have been recently employed in X-ray image analysis. Due to the high potential of deep learning in related image processing applications, it has been used in most of the studies. This survey reviews the recent research on using com…
Towards nonlocal density functionals by explicit modelling of the exchange-correlation hole in inhomogeneous systems
2013
We put forward new approach for the development of a non-local density functional by a direct modeling of the shape of exchange-correlation (xc) hole in inhomogeneous systems. The functional is aimed at giving an accurate xc-energy and an accurate corresponding xc-potential even in difficult near-degeneracy situations such as molecular bond breaking. In particular we demand that: (1) the xc hole properly contains -1 electron, (2) the xc-potential has the asymptotic -1/r behavior outside finite systems and (3) the xc-potential has the correct step structure related to the derivative discontinuities of the xc-energy functional. None of the currently existing functionals satisfies all these re…
Latvijas valsts simtgades svinības: dienas kārtība Latvijas simtgades biroja "Facebook" lapā "LV100" (2017. gada janvāris - 2018. gada marts)
2018
Bakalaura darba nosaukums ir “Latvijas valsts simtgades svinības: dienas kārtība Latvijas simtgades biroja "Facebook" lapā "LV100" (2017. gada janvāris - 2018. gada marts)”. Pētījuma mērķis ir noskaidrot, kuri komunikācijas temati un to aspekti veido prioritāšu sarakstu Latvijas valsts simtgades biroja “Facebook” lapas «LV100» dienas kārtībā no 2017.gada janvāra līdz 2018.gada martam, kā veidota «Facebook» lapas pirmā un otrā līmeņa dienas kārtība un kāda ir «LV100» dienas kārtības ietekme un mijiedarbība ar lietotāju. Darba teorētisko pamatu veido Maksvela Makkomba (Maxwell McCombs) un Donalda Šava (Donald Shaw) pirmā un otrā līmeņa dienas kārtības teorija, kā arī teorētiskais apskats par …
Identificación de factores influyentes en el proceso de aprendizaje en estudios de máster
2019
[ES] La puesta en marcha de los postgrados ha supuesto, en muchos casos, la incorporación de metodologías más apropiadas a este nivel educativo. En el trabajo que se presenta se estudia la repercusión de una metodología, que combina el modelo tradicional y el design thinking, en el rendimiento académico de los estudiantes de un máster ofertado por la Universitat de València y enmarcado dentro de la rama de ciencias sociales y jurídicas. El estudio hace énfasis en si el resultado obtenido aplicando dicha metodología muestra diferencias atendiendo a factores del alumnado de tipo académico y personal (estudios universitarios previos, situación laboral, ...). Si dichas disparidades se confirmar…
Local structural investigation of hafnia-zirconia polymorphs in powders and thin films by X-ray absorption spectroscopy
2019
Björn Matthey (Fraunhofer IKTS, Dresden) is acknowledged for providing HfO2 and ZrO2 powders on short notice after DESY’s renowned customs office punished us. Parts of this research were carried out at Petra III at DESY, a member of the Helmholtz Association (HGF). The experiments on single Si:HfO2 thin film samples were performed at the CLAESS beamline at ALBA Synchrotron with the collaboration of ALBA staff. We would like to thank Edmund Welter for assistance (in using beamline P65) and DESY for enabling this research for proposal no. 20160591 and for travel support. T.S. acknowledges the German Research Foundation (DFG) for funding this work in the frame of the project “Inferox” (project…