Method for evaluating the usability of interactive digital television applications

This article proposes the extent of an inspection method called RECOEXTDI (REcorrido COgnitivo EXtendido para Publicaciones de Televisión Digital Interactiva) to evaluate the usability of applications supported on Interactive DigitalTelevision (IDT) environments. The former method has three basic inputs: The original cognitive walkthrough method,the characteristics of TDI applications, and early testing performed in a TDI laboratory. To assess RECOEXTDI, it isdescribed a case study in which an evaluation of the usability of a TDI application is made, by using the traditionaland the extended method. In this way, the results obtained are compared with the implementation of the two methodsdescribed. The RECOEXTDI method allowed finding a larger number of usability problems in shorter time, comparedwith the traditional method.  En este artículo propone la extensión de un método de inspección denominado RECOEXTDI (REcorrido COgnitivo EXtendido para aplicaciones de Televisión Digital Interactiva), que evalúa la usabilidad de aplicaciones soportadas en ambientes de Televisión Digital Interactiva (TDI). El método propuesto tiene tres insumos básicos: el método original del recorrido cognitivo, las características de las aplicaciones de TDI y una experimentación inicial realizada en un laboratorio de TDI. Para la evaluación de RECOEXTDI se describe un caso de estudio en el que se hace una evaluación de usabilidad de una aplicación TDI utilizando el método tradicional y el extendido. De esta manera, se comparan los resultados obtenidos con la ejecución de los dos métodos. El método RECOEXTDI permitió encontrar una mayor cantidad de problemas de usabilidad en menor tiempo comparado con el método tradicional

Method for evaluating the usability of interactive digital television applications

This article proposes the extent of an inspection method called RECOEXTDI (REcorrido COgnitivo EXtendido para Publicaciones de Televisión Digital Interactiva) to evaluate the usability of applications supported on Interactive DigitalTelevision (IDT) environments. The former method has three basic inputs: The original cognitive walkthrough method,the characteristics of TDI applications, and early testing performed in a TDI laboratory. To assess RECOEXTDI, it isdescribed a case study in which an evaluation of the usability of a TDI application is made, by using the traditionaland the extended method. In this way, the results obtained are compared with the implementation of the two methodsdescribed. The RECOEXTDI method allowed finding a larger number of usability problems in shorter time, comparedwith the traditional method.  En este artículo propone la extensión de un método de inspección denominado RECOEXTDI (REcorrido COgnitivo EXtendido para aplicaciones de Televisión Digital Interactiva), que evalúa la usabilidad de aplicaciones soportadas en ambientes de Televisión Digital Interactiva (TDI). El método propuesto tiene tres insumos básicos: el método original del recorrido cognitivo, las características de las aplicaciones de TDI y una experimentación inicial realizada en un laboratorio de TDI. Para la evaluación de RECOEXTDI se describe un caso de estudio en el que se hace una evaluación de usabilidad de una aplicación TDI utilizando el método tradicional y el extendido. De esta manera, se comparan los resultados obtenidos con la ejecución de los dos métodos. El método RECOEXTDI permitió encontrar una mayor cantidad de problemas de usabilidad en menor tiempo comparado con el método tradicional

Magnetostructural coupling, magnetic ordering, and cobalt spin reorientation in metallic P r0.5 S r0.5Co O3 cobaltite

In half-doped Pr0.50A0.50CoO3 metallic perovskites, the spin-lattice coupling brings about distinct magnetostructural transitions for A=Ca and A=Sr at temperatures close to ~100 K. However, the ground magnetic properties of Pr0.50Sr0.50CoO3 (PSCO) strongly differ from Pr0.50Ca0.50CoO3 ones, where a partial Pr3+ to Pr4+ valence shift and Co spin transition makes the system insulating below the transition. This paper investigates and describes the relationship between the Imma¿I4/mcm symmetry change [Padilla-Pantoja, García-Muñoz, Bozzo, Jirák, and Herrero-Martín, Inorg. Chem. 53, 12297 (2014)] and the original magnetic behavior of PSCO versus temperature and external magnetic fields. The FM1 and FM2 ferromagnetic phases, above and below the magnetostructural transition (TS1~120K) have been investigated. The FM2 phase of PSCO is composed of [100] FM domains, with magnetic symmetry Im'm'a (mx¿0, mz=0). The magnetic space group of the FM1 phase is Fm'm'm (with mx=my). Neutron data analyses in combination with magnetometry and earlier reports results agrees with a reorientation of the magnetization axis by 45° within the ab plane across the transition, in which the system retains its metallic character. The presence below TS1 of conjugated magnetic domains, both of Fm'm'm symmetry but having perpendicular spin orientations along the diagonals in the xy plane of the tetragonal unit cell, is at the origin of the anomalies observed in the macroscopic magnetization. A relatively small field µ0H[¿z]¿30mT is able to reorient the magnetization within the ab plane, whereas a higher field (µ0H[¿z]¿1.2T at 2 K) is necessary to align the Co moments perpendicular to the ab plane. Such a spin reorientation, in which the orbital and spin components of the Co moment rotate joined by 45°, was not observed previously in analogous cobaltites without praseodymium

Evidence of paleoecological changes and Mousterian occupations at the Galeria de las Estatuas site, Sierra de Atapuerca, northern Iberian plateau, Spain

Here we present a new site in the Sierra de Atapuerca (Burgos, Spain): Galeria de las Estatuas (GE), which provides new information about Mousterian occupations in the Iberian Plateau. The GE was an ancient entrance to the cave system, which is currently closed and sealed by a stalagmitic crust, below which a detritic sedimentary sequence of more than 2 m is found. This has been divided into five litostratigraphic units with a rich assemblage of faunal and lithic remains of clear Mousterian affinity. Radiocarbon dates provide minimum ages and suggest occupations older than 45 C-14 ka BP. The palynological analysis detected a landscape change to increased tree coverage, which suggests that the sequence recorded a warming episode. The macromammal assemblage is composed of both ungulates (mainly red deer and equids) and carnivores. Taphonomic analysis reveals both anthropic, and to a lesser extent, carnivore activities. The GE was occupied by Neanderthals and also sporadically by carnivores. This new site broadens the information available regarding different human occupations at the Sierra de Atapuerca, which emphasizes the importance of this site-complex for understanding human evolution in Western Europe

Postcranial morphology of the middle Pleistocene humans from Sima de los Huesos, Spain

Current knowledge of the evolution of the postcranial skeleton in the genus Homo is hampered by a geographically and chronologically scattered fossil record. Here we present a complete characterization of the postcranium of the middle Pleistocene paleodeme from the Sima de los Huesos (SH) and its paleobiological implications. The SH hominins show the following: (i) wide bodies, a plesiomorphic char- acter in the genus Homo inherited from their early hominin ancestors; (ii) statures that can be found in modern human middle-latitude pop- ulations that first appeared 1.6–1.5 Mya; and (iii) large femoral heads in some individuals, a trait that first appeared during the middle Pleistocene in Africa and Europe. The intrapopulational size variation in SH shows that the level of dimorphism was similar to modern humans (MH), but the SH hominins were less encephalized than Ne- andertals. SH shares many postcranial anatomical features with Ne- andertals. Although most of these features appear to be either plesiomorphic retentions or are of uncertain phylogenetic polarity, a few represent Neandertal apomorphies. Nevertheless, the full suite of Neandertal-derived features is not yet present in the SH popula- tion. The postcranial evidence is consistent with the hypothesis based on the cranial morphology that the SH hominins are a sister group to the later Neandertals. Comparison of the SH postcranial skeleton to other hominins suggests that the evolution of the postcranium oc- curred in a mosaic mode, both at a general and at a detailed level

Deciphering the Binding between Nupr1 and MSL1 and Their DNA-Repairing Activity.

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