Knots and Links in Physical Systems(Knots and soft-matter physics: Topology of polymers and related topics in physics, mathematics and biology)

この論文は国立情報学研究所の電子図書館事業により電子化されました。Few physical systems with topologies more complicated than simple gaussian linking have been explored in detail. Here we focus on examples with higher topologies in non-relativistic quantum mechanics and in QCD

CLAD: A Complex and Long Activities Dataset with Rich Crowdsourced Annotations

This paper introduces a novel activity dataset which exhibits real-life and diverse scenarios of complex, temporally-extended human activities and actions. The dataset presents a set of videos of actors performing everyday activities in a natural and unscripted manner. The dataset was recorded using a static Kinect 2 sensor which is commonly used on many robotic platforms. The dataset comprises of RGB-D images, point cloud data, automatically generated skeleton tracks in addition to crowdsourced annotations. Furthermore, we also describe the methodology used to acquire annotations through crowdsourcing. Finally some activity recognition benchmarks are presented using current state-of-the-art techniques. We believe that this dataset is particularly suitable as a testbed for activity recognition research but it can also be applicable for other common tasks in robotics/computer vision research such as object detection and human skeleton tracking

Performance on WAIS-III relates to the Ability to Derive Relations

Experimental evidence suggests that derived relational responding (DRR) may provide a behavioral model of complex language phenomena. This study assigned 72 students to groups based upon their performance on a complex relational task. It was found that performance on DRR relates to scores on the WAIS-III

Microwave Implementation of Two-Source Energy Balance Approach for Estimating Evapotranspiration

A newly developed microwave (MW) land surface temperature (LST) product is used to substitute thermal infrared (TIR) based LST in the Atmosphere Land Exchange Inverse (ALEXI) modelling framework for estimating ET from space. ALEXI implements a two-source energy balance (TSEB) land surface scheme in a time-differential approach, designed to minimize sensitivity to absolute biases in input records of LST through the analysis of the rate of temperature change in the morning. Thermal infrared (TIR) retrievals of the diurnal LST curve, traditionally from geostationary platforms, are hindered by cloud cover, reducing model coverage on any given day. This study tests the utility of diurnal temperature information retrieved from a constellation of satellites with microwave radiometers that together provide 6-8 observations of Ka-band brightness temperature per location per day. This represents the first ever attempt at a global implementation of ALEXI with MW-based LST and is intended as the first step towards providing all-weather capability to the ALEXI framework. The analysis is based on 9-year long, global records of ALEXI ET generated using both MW and TIR based diurnal LST information as input. In this study, the MW-LST sampling is restricted to the same clear sky days as in the IR-based implementation to be able to analyse the impact of changing the LST dataset separately from the impact of sampling all-sky conditions. The results show that long-term bulk ET estimates from both LST sources agree well, with a spatial correlation of 92% for total ET in the Europe/Africa domain and agreement in seasonal (3-month) totals of 83-97 % depending on the time of year. Most importantly, the ALEXI-MW also matches ALEXI-IR very closely in terms of 3-month inter-annual anomalies, demonstrating its ability to capture the development and extent of drought conditions. Weekly ET output from the two parallel ALEXI implementations is further compared to a common ground measured reference provided by the FLUXNET consortium. Overall, the two model implementations generate similar performance metrics (correlation and RMSE) for all but the most challenging sites in terms of spatial heterogeneity and level of aridity. It is concluded that a constellation of MW satellites can effectively be used to provide LST for estimating ET through ALEXI, which is an important step towards all-sky satellite-based retrieval of ET using an energy balance framework

MLA Research Agenda: Appraising the Best Available Evidence

Offers guidelines for the formation and self-governance of autonomous teams as they conduct systematic reviews related to the MLA Research Agenda

DINAMICA DEL MERCADO LABORAL Y PROBABILIDAD DE ESTAR DESEMPLEADO DE LOS PROFESIONALES: UN ANÁLISIS DE LAS TRECE ÁREAS METROPOLITANAS

El presente documento describe la evolución del mercado laboral profesional en el Total de las Trece Áreas Metropolitanas (TTAM) y desarrolla un modelo que permite calcular la probabilidad que un profesional este desempleado. Se utiliza la información de los segundos trimestres de la Encuesta Continua de Hogares en el período 2001-2006. Los resultados muestran que la población económicamente activa del área bajo estudio se caracteriza por un mayor y creciente nivel de cualificación. La tasa global de participación de los profesionales es superior a la de los no profesionales. Por categoría ocupacional, se observa que el sector privado ha ganado importancia como fuente generadora de empleo para los profesionales, mientras que el sector público la ha venido perdiendo. También se evidencia la preferencia del uso de canales de búsqueda informales.Los factores que explican la probabilidad de estar desempleado de los profesionales son los años de estudio, la experiencia, la experiencia al cuadrado, el género y ser jefe de hogar. No obstante, los efectos marginales sobre la probabilidad de estar desempleado de todas las variables explicatorias son mucho más fuertes en el grupo de los profesionales que en los no profesionales.Human capital, theory of the search, labor market/ Capital humano, teoría de la búsqueda, mercado laboral.