Absolute fixing of tide gauge benchmarks and land levels : the BGS contribution to a report on a study of the London and Thames estuary region

This report comprises material submitted as the British Geological Survey (BGS) contribution to the final report of a project measuring changes in land and sea levels using high precision global positioning system (GPS) surveying, absolute gravimetry (AG), persistent scatterer interferometry (PSI) and tide gauge records. Data was collected during the period 1997 to 2005 for a National study of changes around the coast of Great Britain, and a Regional study of changes along parts of the Thames Estuary and the River Thames at London. Since 2003, the national study has been funded by the Joint DEFRA/EA Flood and Coastal Erosion Risk Management R&D Programme, and a regional study, funded by the Environment Agency Thames Estuary 2100 project. The national study was carried out jointly by the Proudman Oceanographic Laboratory (POL) and the University of Nottingham’s Institute of Engineering Surveying and Space Geodesy (IESSG). The regional study was led by IESSG and carried out jointly by IESSG, POL, Nigel Press Associates Ltd. (NPA) and the British Geological Survey (BGS). The item in the project research plan relevant the main BGS input is Objective 08: ‘The estimates of changes in absolute ground level for the regional network of 13 GPS stations and a few thousand PSI points (output from 07) will be analysed, and geological interpretations presented using the geological database and other available information’. The final project report includes a condensed version of this material, with only a few of the figures. That is due to be published as Environment Agency R&D Technical Report FD2319/TR. The geological setting of the London region is described in a report for the EA/NERC CONNECT B project (Bingley et al., 1999), and by Ellison et al. (2004)

HI in the Outskirts of Nearby Galaxies

The HI in disk galaxies frequently extends beyond the optical image, and can trace the dark matter there. I briefly highlight the history of high spatial resolution HI imaging, the contribution it made to the dark matter problem, and the current tension between several dynamical methods to break the disk-halo degeneracy. I then turn to the flaring problem, which could in principle probe the shape of the dark halo. Instead, however, a lot of attention is now devoted to understanding the role of gas accretion via galactic fountains. The current $\rm \Lambda$ cold dark matter theory has problems on galactic scales, such as the core-cusp problem, which can be addressed with HI observations of dwarf galaxies. For a similar range in rotation velocities, galaxies of type Sd have thin disks, while those of type Im are much thicker. After a few comments on modified Newtonian dynamics and on irregular galaxies, I close with statistics on the HI extent of galaxies.Comment: 38 pages, 17 figures, invited review, book chapter in "Outskirts of Galaxies", Eds. J. H. Knapen, J. C. Lee and A. Gil de Paz, Astrophysics and Space Science Library, Springer, in pres

Grain Surface Models and Data for Astrochemistry

AbstractThe cross-disciplinary field of astrochemistry exists to understand the formation, destruction, and survival of molecules in astrophysical environments. Molecules in space are synthesized via a large variety of gas-phase reactions, and reactions on dust-grain surfaces, where the surface acts as a catalyst. A broad consensus has been reached in the astrochemistry community on how to suitably treat gas-phase processes in models, and also on how to present the necessary reaction data in databases; however, no such consensus has yet been reached for grain-surface processes. A team of ∼25 experts covering observational, laboratory and theoretical (astro)chemistry met in summer of 2014 at the Lorentz Center in Leiden with the aim to provide solutions for this problem and to review the current state-of-the-art of grain surface models, both in terms of technical implementation into models as well as the most up-to-date information available from experiments and chemical computations. This review builds on the results of this workshop and gives an outlook for future directions

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters

We present a catalog of 4195 optically confirmed Sunyaev–Zel'dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observations obtained from 2008 to 2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 1 clusters, and a total of 868 systems are new discoveries. Assuming an SZ signal versus mass-scaling relation calibrated from X-ray observations, the sample has a 90% completeness mass limit of M500c > 3.8 × 1014 M⊙, evaluated at z = 0.5, for clusters detected at signal-to-noise ratio >5 in maps filtered at an angular scale of 2farcm4. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ signal mass-scaling relation, such as the Dark Energy Survey (4566 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). We highlight some noteworthy objects in the sample, including potentially projected systems, clusters with strong lensing features, clusters with active central galaxies or star formation, and systems of multiple clusters that may be physically associated. The cluster catalog will be a useful resource for future cosmological analyses and studying the evolution of the intracluster medium and galaxies in massive clusters over the past 10 Gyr

Customer emotions in service failure and recovery encounters

Emotions play a significant role in the workplace, and considerable attention has been given to the study of employee emotions. Customers also play a central function in organizations, but much less is known about customer emotions. This chapter reviews the growing literature on customer emotions in employee–customer interfaces with a focus on service failure and recovery encounters, where emotions are heightened. It highlights emerging themes and key findings, addresses the measurement, modeling, and management of customer emotions, and identifies future research streams. Attention is given to emotional contagion, relationships between affective and cognitive processes, customer anger, customer rage, and individual differences

Formación docente para la implementación de la plataforma virtual Moodle como recurso didáctico en educación básica secundaria

1 recurso en línea (288 páginas) : ilustraciones color, tablas.Este estudio describe una experiencia llevada a cabo en entornos virtuales de aprendizaje Moodle, donde se planteó la utilización de la Educación Virtual como recurso didáctico educativo. A partir de un proceso de formación docente para la implementación de la plataforma virtual Moodle como recurso didáctico de enseñanza, se analizó si se presentaron cambios significativos en las competencias digitales: Pedagógica, tecnológica, comunicativa y de gestión, y a partir de ello se mejoró el desempeño pedagógico de los educadores; de igual forma se indago sobre la posibilidad de que las plataformas virtuales como Moodle puedan convertirse en una alternativa viable que pueda dar respuesta a los nuevos retos educativos relacionados con los ambientes virtuales de aprendizaje para dinamizar el proceso educativo. Como objetivo general del estudio se planteó Identificar las competencias digitales que poseen los docentes para el uso y administración de la plataforma Moodle, en el nivel de educación básica secundaria y media de la Institución Educativa Técnica de Monguí, para implementar un programa de formación encaminado a fortalecer dichas competencias. La metodología empleada en el estudio fue de tipo mixto, porque involucra aspectos cuantitativos como la medición de las variable competencias digitales desarrolladas por los docentes para el empleo de la plataforma virtual Moodle, desde el paradigma cualitativo se tuvieron en cuenta las opiniones y conceptos de los sujetos participantes en el estudio; de los resultados obtenidos se encontró que los programas de formación docente para el uso didáctico de las TIC en entornos de aprendizaje virtual como la plataforma Moodle, cuando son orientados con un modelo pedagógico activo diferente al catedrático, permiten que los educadores apropien el uso de estas tecnologías y sean gestores de proyectos que dinamizan el proceso enseñanza – aprendizaje, al brindar al estudiante la posibilidad de ser un agente participativo y por su puesto al educador ser guía y orientador en el proceso educativo.This study describes an experience carried out in Moodle virtual learning environments, where the use of Virtual Education as an educational didactic resource was proposed. From a process of teacher training for the implementation of the Moodle virtual platform as a didactic teaching resource, it was analyzed if there were significant changes in the digital competences: Pedagogical, technological, communicative and management, and from this the pedagogical performance of educators; In the same way, I inquired about the possibility that virtual platforms such as Moodle could become a viable alternative that could respond to new educational challenges related to virtual learning environments to boost the educational process. The general objective of the study was to identify the digital competences that teachers possess for the use and administration of the Moodle platform, at the level of secondary and secondary education of the Technical Educational Institution of Monguí, to implement a training program aimed at strengthen these competences The methodology used in the study was of mixed type, because it involved quantitative aspects such as the measurement of the variable digital competences developed by teachers for the use of the Moodle virtual platform, from the qualitative paradigm the opinions and concepts of the subjects participating in the study; From the results obtained it was found that the teacher training programs for the didactic use of ICT in virtual learning environments such as the Moodle platform, when they are oriented with an active pedagogical model different from the professor, allow educators to appropriate the use of these technologies and managers of projects that dynamize the teaching - learning process, giving the student the possibility of being a participative agent and of course the educator being a guide and guidance in the educational process.Bibliografía y webgrafía: páginas 196-205MaestríaMagíster en TIC Aplicadas a las Ciencias de la Educació

Search for strong gravity in multijet final states produced in pp collisions at √s=13 TeV using the ATLAS detector at the LHC

A search is conducted for new physics in multijet final states using 3.6 inverse femtobarns of data from proton-proton collisions at √s = 13TeV taken at the CERN Large Hadron Collider with the ATLAS detector. Events are selected containing at least three jets with scalar sum of jet transverse momenta (HT) greater than 1TeV. No excess is seen at large HT and limits are presented on new physics: models which produce final states containing at least three jets and having cross sections larger than 1.6 fb with HT > 5.8 TeV are excluded. Limits are also given in terms of new physics models of strong gravity that hypothesize additional space-time dimensions