387 research outputs found
A New Method for the Solution and Solid Phase Synthesis of Chiral b-Sulfonopeptides Under Mild Conditions.
Q fever: a new ocular manifestation
Q Fever is a zoonosis caused by Coxiella burnetii. Ocular manifestations are rare in this infection. We describe the case of a man complaining of an intense retro-orbital headache, fever, arthralgia, and bilateral loss of vision, who showed an anterior uveitis accompanied by exudative bilateral inferior retinal detachment and optic disk edema. At the beginning, a Vogt–Koyanagi–Harada (VKH) syndrome was suspected, but the patient was diagnosed with Q fever and treatment with doxycycline was initiated, with complete resolution after 2 weeks. We wondered if Q fever could unleash VKH syndrome or simulate a VKH syndrome by a similar immunological process
Beyond the primary influences of parents and peers on very young adolescent alcohol use: evidence of independent community effects
This study examined the extent to which young adolescent alcohol use was related to alcohol-related norms and law enforcement of underage alcohol use, after accounting for known strong parent and peer correlates. Our sample consisted of 7,674 students ((X) over bar age = 12 years) from 30 Australian communities. Two-level (individuals nested within communities) binary logistic regression was used to examine relationships between recent alcohol use (last 30 days) and perceived community norms about alcohol use, perceived law enforcement of underage alcohol use, parent alcohol use, parent permissiveness of adolescent alcohol use, peer alcohol use, and demographic factors. Results indicated that community norms and perceived law enforcement of alcohol use were associated with alcohol use and this association was independent of parent and peer factors. After accounting for proximal social correlates, community factors were significantly associated with alcohol use among very young adolescents
Simplicial quantum dynamics
Present-day quantum field theory can be regularized by a decomposition into
quantum simplices. This replaces the infinite-dimensional Hilbert space by a
high-dimensional spinor space and singular canonical Lie groups by regular spin
groups. It radically changes the uncertainty principle for small distances.
Gaugeons, including the gravitational, are represented as bound fermion-pairs,
and space-time curvature as a singular organized limit of quantum
non-commutativity.
Keywords: Quantum logic, quantum set theory, quantum gravity, quantum
topology, simplicial quantization.Comment: 25 pages. 1 table. Conference of the International Association for
Relativistic Dynamics, Taiwan, 201
Los hábitos de movilidad en la Universitat de València (2005-2006). Problemas de acceso a los campus y sostenibilidad
Las pautas de movilidad cotidiana entre lugar de residencia y lugar de trabajo o estudio son un elemento fundamental de la calidad de vida de los universitarios, con notables implicaciones para la sostenibilidad urbana y la protección del medio ambiente. Desde esta noble perspectiva, este estudio presenta y analiza los resultados de la I Encuesta sobre Hábitos de Movilidad de la Universitat de València (2005-2006). Los universitarios hacen un uso notable del transporte colectivo, pero en los últimos años se está produciendo un cierto abandono de algunos modos de transporte público, que no es compensado por el mayor uso de la bicicleta. Se hace asà necesaria la elaboración de una Plan de Movilidad Universitaria, integrado en una estrategia de movilidad metropolitana, en el que las administraciones públicas y la Universitat adquieran compromisos para avanzar hacia un modelo más sostenible.The patterns of daily mobility between place of residence and place of work or study are a fundamental element of the quality of life of university students, with notable implications for urban sustainability and environmental protection. From this noble perspective, this study presents and analyses the results of the 1st Mobility Habits Survey of the University of Valencia (2005-2006). University students make a notable use of public transport, but in recent years there has been a certain abandonment of some modes of public transport, which is not compensated for by the increased use of bicycles. It is therefore necessary to draw up a University Mobility Plan, integrated into a metropolitan mobility strategy, in which the public administrations and the University make commitments to move towards a more sustainable model
Revisión sistemática de Responsabilidad Social Universitaria y Aprendizaje Servicio: análisis para su institucionalización.
La presente investigación muestra una revisión sistemática de la metodologÃa Aprendizaje Servicio (ApS) y su interacción con la Responsabilidad Social Universitaria (RSU). Su objetivo principal es observar las contribuciones, valores y compromiso social que brinda la educación superior, desde el ApS, a la sociedad, a través de diversos procedimientos existentes de institucionalización. Para ello se ha realizado un análisis de las interacciones que generan el ApS y la rsu presentando lo que esta metodologÃa permite: incrementar los resultados sociales y de gestión universitaria creando una posición institucional basada en valores, principios polÃticos y ética universitaria. Se ha llevado a cabo un protocolo de búsqueda que ha permitido clasificar diversas investigaciones. Como resultado se ha obtenido un conjunto de artÃculos que indican la heterogeneidad del método de investigación y de sus técnicas. This study presents a systematic review of the Service Learning (SL) methodology and its interaction with University Social Responsibility (USR). The main objective is to observe the contributions, values, and social commitment that SL in higher education offers the community, through various existing procedures of institutionalization. To this end, an analysis was made of the interactions that SL and USR generate, and a presentation given of SL products: an increase in the university's social and managerial results, and the creation of an institutional position based on values, political princi-ples, and university ethics. A search protocol was used to classify various studies. The result is a set of articles that indicate the heterogeneity of the research methodology and its techniques
Object Relations in the Museum: A Psychosocial Perspective
This article theorises museum engagement from a psychosocial perspective. With the aid of selected concepts from object relations theory, it explains how the museum visitor can establish a personal relation to museum objects, making use of them as an ‘aesthetic third’ to symbolise experience. Since such objects are at the same time cultural resources, interacting with them helps the individual to feel part of a shared culture. The article elaborates an example drawn from a research project that aimed to make museum collections available to people with physical and mental health problems. It draws on the work of the British psychoanalysts Donald Winnicott and Wilfred Bion to explain the salience of the concepts of object use, potential space, containment and reverie within a museum context. It also refers to the work of the contemporary psychoanalyst Christopher Bollas on how objects can become evocative for individuals both by virtue of their intrinsic qualities and by the way they are used to express personal idiom
Spin states of asteroids in the Eos collisional family
Eos family was created during a catastrophic impact about 1.3 Gyr ago.
Rotation states of individual family members contain information about the
history of the whole population. We aim to increase the number of asteroid
shape models and rotation states within the Eos collision family, as well as to
revise previously published shape models from the literature. Such results can
be used to constrain theoretical collisional and evolution models of the
family, or to estimate other physical parameters by a thermophysical modeling
of the thermal infrared data. We use all available disk-integrated optical data
(i.e., classical dense-in-time photometry obtained from public databases and
through a large collaboration network as well as sparse-in-time individual
measurements from a few sky surveys) as input for the convex inversion method,
and derive 3D shape models of asteroids together with their rotation periods
and orientations of rotation axes. We present updated shape models for 15
asteroids and new shape model determinations for 16 asteroids. Together with
the already published models from the publicly available DAMIT database, we
compiled a sample of 56 Eos family members with known shape models that we used
in our analysis of physical properties within the family. Rotation states of
asteroids smaller than ~20 km are heavily influenced by the YORP effect, whilst
the large objects more or less retained their rotation state properties since
the family creation. Moreover, we also present a shape model and bulk density
of asteroid (423) Diotima, an interloper in the Eos family, based on the
disk-resolved data obtained by the Near InfraRed Camera (Nirc2) mounted on the
W.M. Keck II telescope.Comment: Accepted for publication in ICARUS Special Issue - Asteroids: Origin,
Evolution & Characterizatio
Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution
The larger number of models of asteroid shapes and their rotational states
derived by the lightcurve inversion give us better insight into both the nature
of individual objects and the whole asteroid population. With a larger
statistical sample we can study the physical properties of asteroid
populations, such as main-belt asteroids or individual asteroid families, in
more detail. Shape models can also be used in combination with other types of
observational data (IR, adaptive optics images, stellar occultations), e.g., to
determine sizes and thermal properties. We use all available photometric data
of asteroids to derive their physical models by the lightcurve inversion method
and compare the observed pole latitude distributions of all asteroids with
known convex shape models with the simulated pole latitude distributions. We
used classical dense photometric lightcurves from several sources and
sparse-in-time photometry from the U.S. Naval Observatory in Flagstaff,
Catalina Sky Survey, and La Palma surveys (IAU codes 689, 703, 950) in the
lightcurve inversion method to determine asteroid convex models and their
rotational states. We also extended a simple dynamical model for the spin
evolution of asteroids used in our previous paper. We present 119 new asteroid
models derived from combined dense and sparse-in-time photometry. We discuss
the reliability of asteroid shape models derived only from Catalina Sky Survey
data (IAU code 703) and present 20 such models. By using different values for a
scaling parameter cYORP (corresponds to the magnitude of the YORP momentum) in
the dynamical model for the spin evolution and by comparing synthetics and
observed pole-latitude distributions, we were able to constrain the typical
values of the cYORP parameter as between 0.05 and 0.6.Comment: Accepted for publication in A&A, January 15, 201
Plan de negocios para la implementaci?n de un taller m?vil de inspecci?n previa a la entrega (PDI) de veh?culos nuevos al concesionario
PDI por sus siglas en ingles Pre Delivery Inspection, viene a ser la Inspecci?n Previa a la Entrega de veh?culos nuevos al concesionario, este servicio consta de realizar la inspecci?n mec?nica y el?ctrica, as? como verificaciones que se deben realizar para corroborar que el veh?culo se encuentra operativo. Actualmente el servicio de control de calidad de PDI es realizado por los operadores log?sticos, con personal propio entre auxiliares de almac?n y t?cnicos no necesariamente especializados, tampoco cuentan con una unidad de negocio dedicada a estas actividades propiamente dichas. Adem?s, realizan el servicio de manera convencional dedicando un ?rea determinada que se podr?a usar para el almacenamiento de materiales, actividad core del negocio de los operadores log?sticos. Se propone el servicio PDI M?vil bajo los siguientes enfoques: Tercerizado de tal forma que la empresa que brinde el servicio de calidad sea con personal calificado y cumpliendo con los est?ndares de marca. M?vil de tal forma que el servicio se realice en el punto de almacenamiento de los veh?culos livianos, evitando que se trasladen al ?rea donde se ejecuta el PDI. El principal inter?s es contribuir a la creaci?n de valor de los clientes y usuarios finales a trav?s de un servicio de PDI de calidad
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