Arte e resistência: Vincent Willem Van Gogh

Esta tese apresenta uma proposta interdisciplinar para abordar o objeto artístico, almejando demonstrar como a Psicologia pode enfocar a leitura e a interpretação das produções artísticas visuais. Foram aplicados métodos psicológicos considerados eficazes para entender o fenômeno artístico e, assim, interpretar o trabalho do artista. O instrumental teórico foi o da apreensão fenomenológica e o conhecimento psicanalítoco. Trinta e nove telas de Van Gogh (produzidas em Arles, 1888; no asilo de Saint Rémy, Provence, 1889; e em Auvers Sur Oise, 1890) foram selecionadas para análise. Foram Observados os aspectos da visualidade da obra, segundo a ótica fenomenológica, e as imagens foram investigadas em sua disposição em um espaço simbólico do espaço pessoal do artista, dos elementos configurados que compõem a foma, da iluminação e cor empregadas no trabalho e da dinâmica e expressão dos conteúdos manifestos. A tese constitui-se de quatro capítulos. O primeiro apresenta a história do artista; o segundo, a teoria para abordar a percepção fenomenológica, definindo elementos utilizados para interpretar o objeto artístico; o terceiro analisa as imagens produzidas por Van Gogh no período estudado; o quarto diagnostica, analisa e interpreta a expressão das imagens. Foi também analisada a temática explorada pelo artista, de acordo com sua manifestação simbólica. A trajetória deste trabalho assemelhase ao psicodiagnóstico, que levanta hipóteses e verifica se elas são verdadeiras ou falsas. Assim foi levantada a hipótese de que a arte atuava na existência do artista como um procedimento terapêutico e mantenedor do seu equilibrio. A maior êncase da literatura recai na loucura de Van Gogh como propulsora de sua obra, visão oposta à desta tese... (Resumo completo, clicar acesso eletrônico abaixo)

Benefits of soil carbon: report on the outcomes of an international scientific committee on problems of the environment rapid assessment workshop

A Scientific Committee on Problems of the Environment Rapid Assessment (SCOPE-RAP) workshop was held on 18-22 March 2013. This workshop was hosted by the European Commission, JRC Centre at Ispra, Italy, and brought together 40 leading experts from Africa, Asia, Europe and North and South America to create four synthesis chapters aimed at identifying knowledge gaps, research requirements, and policy innovations. Given the forthcoming publication by CABI of a book volume of the outcomes of the SCOPE-RAP in 2014, this workshop report provides an update on the global societal challenge of soil carbon management and some of the main issues and solutions that were identified in the four working sessions.

Leitura em Ambientes Cíbridos: a cosmo(a)gonia geométrica de Patrick Burgaud

Contemporary culture is showing us, with growing evidence, that fields of knowledge and spheres of action interpenetrate strongly, forcing us to change behavior in order to connive with the productive and creative new ways. Our scope is to consider the cybrid environment in which we situate the reader in his relations with the poetic productions created in the digital world, from the perspective of a contemporary context of reading done through interfaces and also by a reading of a poem by Patrick Burgaud.

Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data

In this paper we present the results of a coherent narrow-band search for continuous gravitational-wave signals from the Crab and Vela pulsars conducted on Virgo VSR4 data. In order to take into account a possible small mismatch between the gravitational-wave frequency and two times the star rotation frequency, inferred from measurement of the electromagnetic pulse rate, a range of 0.02 Hz around two times the star rotational frequency has been searched for both the pulsars. No evidence for a signal has been found and 95% confidence level upper limits have been computed assuming both that polarization parameters are completely unknown and that they are known with some uncertainty, as derived from x-ray observations of the pulsar wind torii. For Vela the upper limits are comparable to the spin-down limit, computed assuming that all the observed spin-down is due to the emission of gravitational waves. For Crab the upper limits are about a factor of 2 below the spin-down limit, and represent a significant improvement with respect to past analysis. This is the first time the spin-down limit is significantly overcome in a narrow-band search.

Directed search for gravitational waves from Scorpius X-1 with initial LIGO data

We present results of a search for continuously emitted gravitational radiation, directed at the brightest low-mass x-ray binary, Scorpius X-1. Our semicoherent analysis covers 10 days of LIGO S5 data ranging from 50-550 Hz, and performs an incoherent sum of coherent F-statistic power distributed amongst frequency-modulated orbital sidebands. All candidates not removed at the veto stage were found to be consistent with noise at a 1% false alarm rate. We present Bayesian 95% confidence upper limits on gravitational-wave strain amplitude using two different prior distributions: a standard one, with no a priori assumptions about the orientation of Scorpius X-1; and an angle-restricted one, using a prior derived from electromagnetic observations. Median strain upper limits of 1.3 x 10(-24) and 8 x 10(-25) are reported at 150 Hz for the standard and angle-restricted searches respectively. This proof-of-principle analysis was limited to a short observation time by unknown effects of accretion on the intrinsic spin frequency of the neutron star, but improves upon previous upper limits by factors of similar to 1.4 for the standard, and 2.3 for the angle-restricted search at the sensitive region of the detector.

Advanced LIGO

The Advanced LIGO gravitational wave detectors are second-generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA, USA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in Initial LIGO, Fabry-Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling has been added in Advanced LIGO to improve the frequency response. In the most sensitive frequency region around 100 Hz, the design strain sensitivity is a factor of 10 better than Initial LIGO. In addition, the low frequency end of the sensitivity band is moved from 40 Hz down to 10 Hz. All interferometer components have been replaced with improved technologies to achieve this sensitivity gain. Much better seismic isolation and test mass suspensions are responsible for the gains at lower frequencies. Higher laser power, larger test masses and improved mirror coatings lead to the improved sensitivity at mid and high frequencies. Data collecting runs with these new instruments are planned to begin in mid-2015.

Weyl-van der Waerden spinor technique for spin-3/2 fermions

We use the Weyl-van der Waerden spinor technique to construct helicity wave functions for massless and massive spin-3/2 fermions. We apply our formalism to evaluate helicity amplitudes taking into account some phenomenological couplings involving these particles.

A classificação das disciplinas matemáticas e a Mathesis Universalis nos séculos XVI e XVII: um estudo do pensamento de Adriaan van Roomen

Pós-graduação em Educação Matemática - IGCE