On the Space Time of a Galaxy

We present an exact solution of the averaged Einstein's field equations in the presence of two real scalar fields and a component of dust with spherical symmetry. We suggest that the space-time found provides the characteristics required by a galactic model that could explain the supermassive central object and the dark matter halo at once, since one of the fields constitutes a central oscillaton surrounded by the dust and the other scalar field distributes far from the coordinate center and can be interpreted as a halo. We show the behavior of the rotation curves all along the background. Thus, the solution could be a first approximation of a ``long exposition photograph'' of a galaxy.Comment: 8 pages REVTeX, 11 eps figure

Oscillatons revisited

In this paper, we study some interesting properties of a spherically symmetric oscillating soliton star made of a real time-dependent scalar field which is called an oscillaton. The known final configuration of an oscillaton consists of a stationary stage in which the scalar field and the metric coefficients oscillate in time if the scalar potential is quadratic. The differential equations that arise in the simplest approximation, that of coherent scalar oscillations, are presented for a quadratic scalar potential. This allows us to take a closer look at the interesting properties of these oscillating objects. The leading terms of the solutions considering a quartic and a cosh scalar potentials are worked in the so called stationary limit procedure. This procedure reveals the form in which oscillatons and boson stars may be related and useful information about oscillatons is obtained from the known results of boson stars. Oscillatons could compete with boson stars as interesting astrophysical objects, since they would be predicted by scalar field dark matter models.Comment: 10 pages REVTeX, 10 eps figures. Updated files to match version published in Classical and Quantum Gravit

Ergonomic evaluation of office workplaces with Rapid Office Strain Assessment (ROSA)

The regular use of the computer in the office contributed to the appearance of many risk factors related with work-related musculoskeletal disorders (WRMSD) such as maintaining static sitting postures for long time and awkward postures of the head, neck and upper limbs, leading to increased muscle activity in the cervical spine and shoulders. The objective of this study was to evaluate the presence of risk factors for WRMSD in an office using the Rapid Assessment Office Strain method (ROSA). Based on the results of this ergonomic evaluation, an occupational gym program was designed and implemented. Thirty-eight workplaces were evaluated using the observation of the tasks and pictures records in order to characterize those tasks in more detail. The ROSA tool was applied by an observer, who selected the appropriate score based on the worker's posture as well as the time spent in each posture. Scores were recorded for the sections of the method, specifically Chair, Monitor and Mouse and Keyboard and Telephone. The scores were recorded in a sheet developed for the method. The mean ROSA final score was 3.61 ± 0.64, for Chair section was 3.45 ± 0.55, to Monitor and Telephone section was 3.11 ± 0.61, and to Mouse and Keyboard section was 2.11 ± 0.31. The results led to understand that the analyzed tasks represent situations of risk of discomfort and, according to the methods guidelines, further research and modifications of the workplace may be necessary. It should be emphasized that these scores may not be related to the poor available equipment but with the need to optimize their use by the workers. It was noticed also that the interaction of workers with the tasks and the adopted sitting posture at the computer throughout the day have effects at a muscular level, essentially for the cervical area and shoulders. ROSA tool is an useful and easy method to assess several risk factors associated with WRMSD, also allowing the design of specific occupational gym programs

Quintessence and Scalar Dark Matter in the Universe

Continuing with previous works, we present a cosmological model in which dark matter and dark energy are modeled by scalar fields $\Phi$ and $\Psi$, respectively, endowed with the scalar potentials $V(\Phi)=V_{o}[ \cosh {(\lambda \sqrt{\kappa_{o}}\Phi)}-1]$ and $\tilde{V}(\Psi)=\tilde{V_{o}}[ \sinh {(\alpha \sqrt{\kappa_{o}}\Psi)}] ^{\beta}$. This model contains 95% of scalar field. We obtain that the scalar dark matter mass is $m_{\Phi}\sim 10^{-26}eV.$ The solution obtained allows us to recover the success of the standard CDM. The implications on the formation of structure are reviewed. We obtain that the minimal cutoff radio for this model is $r_{c}\sim 1.2 kpc.$Comment: 4 pages REVTeX, 3 eps color figures. Minor changes and references updated. To appear in Classical and Quantum Gravity as a Letter to the Editor. More information at http://www.fis.cinvestav.mx/~siddh/PHI

Impact of a workplace exercise program on neck and shoulder segments in office workers

Work-related musculoskeletal disorders are a common problem among office workers. The purpose of this study is to evaluate the impact of a workplace exercise program on neck and shoulder pain and flexibility in office workers. The workstation assessment was performed using Rapid Office Strain Assessment. Workers were assessed for pain pre- and post-implementation of the workplace exercise program using the Nordic Questionnaire for Musculoskeletal Symptoms, and for flexibility. The program lasted 3 months and entailed twice weekly sessions. The sample consisted of an intervention group (n = 30) and a control group (n = 8). The results suggest improvements in pain reduction and increased flexibility. The workers had less musculoskeletal pain at the end of the evaluation. The increase in flexibility between the evaluations was significant in the intervention group, though there were slight improvements there too.Trastornos musculoesqueléticos relacionados con el trabajo son un problema común entre los trabajadores de oficina. El propósito de este estudio es evaluar el impacto de un programa de gimnasia laboral en la dolor de cuello y hombro, y la flexibilidad en los trabajadores de oficina. La evaluación del puesto de trabajo se realizó a través de Rapid Office Strain Assessment. Los trabajadores fueron evaluados para el dolor pre y post-ejecución del programa de gimnasia utilizando el Nordic Questionnaire for Musculoskeletal Symptoms, y por la flexibilidad. El programa tuvo una duración de 3 meses y supuso sesiones dos veces por semana. La muestra está formada por un grupo de intervención (n = 30) y un grupo control (n = 8). Los resultados sugieren mejoras en la reducción del dolor y aumento de la flexibilidad. Los trabajadores tuvieron menos dolor musculoesquelético al final de la evaluación. El aumento de flexibilidad entre dos puntos de tiempo de la evaluación fue significativo en el grupo de intervención, aunque hubo una ligera mejora allí también.This study received financial support from the Portuguese Foundation for Science and Technology, under project ID/CEC/00319/2013

Austerity, the state and common sense in Europe: A comparative perspective on Italy and Portugal

In this article, we examine the making of austerity as common sense, located at the intersection of state interventions and the everyday practices and moral logics through which austerity emerges as an acceptable livelihood possibility for individuals, households and communities. Our argument is based on the comparative analysis of austerity in Italy and Portugal, with a focus on popular austerities among working-class households in two post-industrial towns. With the aim of addressing the conundrum of the pervasiveness of austerity, we emphasize the relevance of Gramsci’s notion of common sense to expand the anthropological theorization of austerity as a hegemonic project combining coercion and consent, capable of reconfiguring the state, and as a field of contradictions endemic to the very making of common sense. We argue that austerity regimes become operative through the deployment of institutional coercive practices, moral arguments and the ideological co-optation of historical legacies of austerity embodied by ordinary people in their livelihood praxis.info:eu-repo/semantics/acceptedVersio

Produção de água de coco do híbrido Anão Vermelho do Brasil de Gramane x Gigante do oeste africano em função da idade de colheita do fruto.

bitstream/CPATC-2009-09/20636/1/cot_85.pdfMeta 2008

Why a new representation model for games: the code form

The aim of this work is to present a representation model of games which will establish the characteristics of each game with complete rigour. This model is presented emphasizing applications of theory, as much or more than the theory itself due to thinking, on the one hand, that applications help understand theory, and on the other, that applications illustrate the process of model building. Thus, this model is intended to illustrate the full rigour games both in terms of information, and in terms of real time structure of the gamesinfo:eu-repo/semantics/publishedVersio

Convex sets strict separation in the minimax theorem

The convex sets strict separation is very useful to obtain mathematical optimization results. The minimax theorem, a key result in Game Theory is an example. It will be outlined in this work.info:eu-repo/semantics/publishedVersio

Attachment and adaptation to breast cancer: The mediating role of avoidant emotion processes

Attachment insecurity is associated with difficulties in adapting to cancer. Accumulating evidence points to the influence of avoidant emotion processes in this association. This study explored this pathway by examining the association between attachment insecurity and quality of life in women with breast cancer, and by exploring the mediating role of two avoidant emotion processes in this association. Women with breast cancer (N = 155) completed measures of attachment, emotional suppression, emotional awareness and quality of life. Avoidance of attachment was positively associated with emotional suppression (β = .29, p \u3c .01) and lack of emotional awareness (β = .27, p \u3c .01), and negatively associated with quality of life (β = −.22, p \u3c .05). Lack of emotional awareness partially mediated the relationship between attachment avoidance and quality of life (indirect effect β = −.12, p = .008). Attachment anxiety was not associated with any variable. Attachment avoidance may hinder the process of adaptation to breast cancer and difficulties in identifying and describing emotions may be partly responsible for this influence. Access to and ability to benefit from social and medical supports is likely to depend on being able to engage with others and recognise and process emotions effectively. Research and clinical implications are discussed