Searches for vector-like quarks and ttˉt\bar{t} resonances with the ATLAS detector

Searches for vector-like quarks and $t\bar{t}$ resonances are performed with the ATLAS experiment at the Large Hadron Collider using an integrated luminosity of 14.3~fb$^{-1}$ of proton-proton collisions recorded in 2012 at a center-of-mass energy of $\sqrt{s} =$ 8~TeV. Several final states have been exploited to carry out these searches such as lepton plus jets and opposite and same-sign dilepton final states. No significant excess of events above the Standard Model expectation is observed, and upper limits at 95$\%$ CL are derived for vector-like quarks of various masses in a two-dimensional plane of branching ratios, and for $t\bar{t}$ resonances in two benchmark models, a topcolor leptophobic $Z'$ and a Kaluza-Klein gluon.Comment: 6 pages, 3 figures, Proceedings of The Second Annual Conference on Large Hadron Collider Physics, Columbia University, New York, U.S.A, June 2-7, 201

Residual effect of natural and synthetic zinc chelates on zinc in a soil solution of a waterlogged acidic soil. Evolution of the pH and redox potential.

Zinc chelates have been widely used to correct deficiencies in this micronutrient in different soil types and under different moisture conditions. The aging of the metal in soil could cause a change in its availability. Over time the most labile forms of Zn could decrease in activity and extractability and change to more stable forms. Various soil parameters, such as redox conditions, time, soil type and moisture conditions, affect the aging process and modify the solubility of the metal. In general, redox conditions influence pH and also the chemical forms dissolved in the soil solution. Soil pH also affects Zn solubility; at high pH values, most of the Zn is present in forms that are not bioavailable to plants. The objective of this study was to determine the changes in Zn over time in a soil solution in a waterlogged acidic soil to which synthetic and natural chelates were applie

Have working conditions and health deteriorated in Europe 2005-2015?

La crisis económica de la última década ha puesto en riesgo el estado del bienestar en algunos países. Una de las medidas utilizadas para contrastar esta afirmación hace referencia a la vida laboral de los empleados, lo que lleva a la necesidad de asegurar unas condiciones de trabajo sostenibles que no perjudiquen la salud. Este trabajo analiza qué condiciones de trabajo están más relacionadas con la percepción de estrés laboral por parte de los trabajadores en el período comprendido entre 2005 y 2015 en la EU 28. Con datos de la EWCS (European Working Conditions Survey) (2005, 2010 y 2015), se aplica un modelo logit multinivel, obteniéndose las siguientes conclusiones: - Con referencia al género, se comprueba que las mujeres tienden a sufrir más estrés, incrementándose la probabilidad en el sector servicios entre 2005 y 2010. - Niveles elevados de educación y renta están correlacionados con una elevada probabilidad de estrés. - En 2005, el índice de calidad en el trabajo más relacionado con el estrés era el entorno físico. Desde 2010 es la intensidad en el trabajo. - La importancia de estudios como éste se justifica en que el estrés laboral minora el bienestar de los trabajadores empleados porque afecta negativamente a su salud, es costoso para las empresas porque incrementa el absentismo y hace descender la productividad, y es gravoso para la sociedad en su conjunto porque hace que suban los costes sanitarios y las prestaciones sociales.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Development and calibration of a cost-effective temperature sensor

Oceanographic sensors are accurate and reliable but very expensive. We have developed and calibrated a cheap temperature sensor with a good cost/ accuracy ratio.Peer Reviewe

A note on the Gauge Symmetries of Unimodular Gravity

The symmetries of Unimodular Gravity are clarified somewhat.Comment: 4 pages, v2: acknowledgments correcte

Foundations and social economy: conceptual approaches and socio-economic relevance

Theoretical debate about the nature of charitable foundations has traditionally become polarized around two distinct conceptual approaches: the non-profit or third sector approach, versus the social economy approach. This research tries to find a common ground between these two approaches, and to highlight the specificities of the foundation as an organizational formula, supporting its current socio-economic relevance with latest quantitative data on the contemporary Spanish foundation sector. In order to achieve this purpose, data from the main empirical studies about the sector during the last decade are compared, with a special focus on those obtained by the recently constituted Institute for Strategic Analysis of Foundations (INAEF).Foundations, social economy, non-profit organizations, third sector, socioeconomic impact, INAEF.

Supporting task creation inside FPGA devices

The most common model to use co-processors/accelerators is the master-slave model where the slaves (coprocessors/ accelerators) are driven by a general purpose cpu. This simplifies the management of the accelerators because they cannot actively interact with the runtime and they are just passive slaves that operate over the memory under demand. However, the master-slave model limits system possibilities and introduces synchronization overheads that could be avoided. To overcome those limitations and increase the possibilities of accelerators, we propose extending task based programming models (like OpenMP [1] or OmpSs) to support some runtime APIs inside the FPGA co-processor. As a proof-of-concept, we implemented our proposal over the OmpSs@FPGA environment [2] adding the needed infrastructure in the FPGA bitstream and modifying the existing tools to support creation of children tasks inside a task offloaded to an FPGA accelerator. In addition, we added support to synchronize the children tasks created by a FPGA task regardless they are executed in a SMP host thread or they also target another FPGA accelerator in the same co-processor

Gender of Personality and Individual Differences (PAID) contributors: An analysis of recent years (2008-2016)

This study aims to identify the gender of researchers who published in Personality and Individual Differences (PAID) during the 2008–2016 period. Of a total of 12,137 authorships, gender could be identified in 11,023 (90.8%). Results show a slight gender imbalance in favor of men that tends to diminish throughout the years, almost reaching parity in the last three years. Data show that: a) gender asymmetry is greater in the number of authorships than in the number of authors (individuals), partly because men tend to publish in a wider range of years during the period studied; b) men are relatively overrepresented in the last (senior) position of the author by-line; and c) in relative terms, women tend to be concentrated in the last years of the period studied. Taken together, these three points suggest that age probably plays a role in the (slight) gender imbalance, as observed in other scientific fields. Regarding the scientific impact of contributors, no gender differences were found in the number of citations received