Notas sobre o problema da explicação e da experiência no ensino da Filosofia

Apesar do esforço dos defensores do ensino da Filosofia para que essa disciplina volte a fazer parte do Ensino Médio, observamos, atualmente, seu abandono nos cursos universitários. Notamos que hoje, na sociedade normalizada e no espaço educacional, não é mais valorizado o desenvolvimento integral do pensamento, mas a transmissão de uma série de conteúdos que, supostamente, dão condições para a integração do estudante no quadro do progresso tecnológico e proporcionam sua entrada no mercado de trabalho. Circunscrevendo-se nesse contexto, neste texto pretende-se investigar o espaço em que o ensino da Filosofia se desenvolve na atualidade. Delineando os contornos de um problema que emerge nos espaços institucionais universitários onde o ensino da Filosofia ainda persiste, procurou-se evidenciar em que bases a Filosofia é ensinada. Procurou-se, ainda, compreender quais consequências os modos de compreender o ensino da Filosofia trazem para o aprendizado do filosofar. Uma consideração a que se pode chegar, a partir deste estudo, é a de que o ensino da Filosofia além de não privilegiar, e muitas vezes negar, a experiência de pensamento que o aluno pode fazer e ter com o texto filosófico, contribui para o empobrecimento dessa mesma experiência do e com o filosofar.

Direct instantons, topological charge screening, and QCD glueball sum rules

Nonperturbative Wilson coefficients of the operator product expansion (OPE) for the spin-0 glueball correlators are derived and analyzed. A systematic treatment of the direct instanton contributions is given, based on a realistic instanton size distribution and renormalization at the operator scale. In the pseudoscalar channel, topological charge screening is identified as an additional source of (semi-) hard nonperturbative physics. The screening contributions are shown to be vital for consistency with the anomalous axial Ward identity, and previously encountered pathologies (positivity violations and the disappearance of the 0(-+) glueball signal) are traced to their neglect. on the basis of the extended OPE, a comprehensive quantitative analysis of eight Borel-moment sum rules in both spin-0 glueball channels is then performed. The nonperturbative OPE coefficients turn out to be indispensable for consistent sum rules and for their reconciliation with the underlying low-energy theorems. The topological short-distance physics strongly affects the sum rule results and reveals a rather diverse pattern of glueball properties. New predictions for the spin-0 glueball masses and decay constants and an estimate of the scalar glueball width are given, and several implications for glueball structure and experimental glueball searches are discussed.

Gestão ambiental: uma súplica do planeta, um desafio para políticas públicas, incubadoras e pequenas empresas

O texto traz uma reflexão sobre o papel das incubadoras de empresas no apoio a práticas ambientais por micro e pequenas empresas. Reconhecendo as debilidades estruturais das empresas de pequeno porte e as dificuldades para a realização de investimentos ambientais, defende o uso de incubadoras como instrumento de política pública para estimular investimentos ambientais. Identifica um número restrito de incubadoras de tecnologias ambientais, em plano internacional. Relata os resultados de uma pesquisa que avaliou a aplicabilidade de um indicador para apurar o desempenho ambiental de incubadoras. Destacaram-se dois resultados: a) a baixa importância atribuída, pelas incubadoras (e pelas empresas abrigadas) ao desempenho ambiental; e b) a ausência de estímulos, pelas incubadoras, aos investimentos ambientais. Desse último resultado deriva importante conclusão: a de que, uma vez apurados os padrões insatisfatórios de desempenho ambiental, de incubadoras e empresas assistidas, ficariam criadas as condições para a formulação e a implementação de medidas indutoras de novas posturas.

Non-Hermitian multichannel theory of ultracold collisions modified by intense light fields tuned to the red of the trapping transition

We develop a systematic scheme to treat binary collisions between ultracold atoms in the presence of a strong laser field, tuned to the red of the trapping transition. We assume that the Rabi frequency is much less than the spacing between adjacent bound-state resonances, In this approach we neglect fine and hyperfine structures, but consider fully the three-dimensional aspects of the scattering process, up to the partial d wave. We apply the scheme to calculate the S matrix elements up to the second order in the ratio between the Rabi frequency and the laser detuning, We also obtain, fur this simplified multichannel model, the asymmetric line shapes of photoassociation spectroscopy, and the modification of the scattering length due to the light field at low, but finite, entrance kinetic energy. We emphasize that the present calculations can be generalized to treat more realistic models, and suggest how to carry out a thorough numerical comparison to this semianalytic theory. [S1050-2947(98)04902-6].

Quantum equivalence between the self-dual and the Maxwell-Chern-Simons models nonlinearly coupled to U(1) scalar fields

The use of master actions to prove duality at quantum level becomes cumbersome if one of the dual fields interacts nonlinearly with other fields. This is the case of the theory considered here consisting of U(1) scalar fields coupled to a self-dual field through a linear and a quadratic term in the self-dual field. Integrating perturbatively over the scalar fields and deriving effective actions for the self-dual and the gauge field we are able to consistently neglect awkward extra terms generated via master action and establish quantum duality up to cubic terms in the coupling constant. The duality holds for the partition function and some correlation functions. The absence of ghosts imposes restrictions on the coupling with the scalar fields.

Ab Initio correlated all electron dirac-fock calculations for Eka-Francium Fluoride (E119F)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Inelastic photoproduction at HERA: A second charmonium crisis?

Measurements of the inelastic photoproduction of charmonium at HERA have ignited a new charmonium crisis. The Color Singlet approach to computing onium production cross sections fits the data for large charmonium energy fraction z, where color octet models fail. This approach is however in qualitative disagreement with a wealth of information that exist on charmonium production by other initial states. We here suggest that the source of the discrepancy between color octet models (whether implemented in the soft color or NRQCD formalism) and data is due to the neglect of non-perturbative effects. Implementing these in a scheme originally developed for Drell-Yan phenomenology, we illustrate how agreement with the data is achieved. © 1999 Elsevier Science B.V. All rights reserved.

N-methyl-D-aspartate channel and consciousness: From signal coincidence detection to quantum computing

Research on Blindsight, Neglect/Extinction and Phantom limb syndromes, as well as electrical measurements of mammalian brain activity, have suggested the dependence of vivid perception on both incoming sensory information at primary sensory cortex and reentrant information from associative cortex. Coherence between incoming and reentrant signals seems to be a necessary condition for (conscious) perception. General reticular activating system and local electrical synchronization are some of the tools used by the brain to establish coarse coherence at the sensory cortex, upon which biochemical processes are coordinated. Besides electrical synchrony and chemical modulation at the synapse, a central mechanism supporting such a coherence is the N-methyl-D-aspartate channel, working as a 'coincidence detector' for an incoming signal causing the depolarization necessary to remove Mg 2+, and reentrant information releasing the glutamate that finally prompts Ca 2+ entry. We propose that a signal transduction pathway activated by Ca 2+ entry into cortical neurons is in charge of triggering a quantum computational process that accelerates inter-neuronal communication, thus solving systemic conflict and supporting the unity of consciousness. © 2001 Elsevier Science Ltd.

Childhood trauma in substance use disorder and depression: An analysis by gender among a Brazilian clinical sample

Objective: In this study, we compared the frequency and intensity of childhood traumas in alcohol- or other drug-dependent patients, in patients with depression, and in a control group without psychiatric diagnoses. Methods: The study had a retrospective design of a clinical sample of men and women from the groups listed above. They were evaluated by the same standardized instrument: the Childhood Trauma Questionnaire.. Results: A higher frequency and intensity of emotional, physical, and sexual abuse were found in alcohol- and other drug-dependent patients than in patients with depression, who, in turn, presented significantly higher proportions than the control group. In all of the cases, the frequency was higher among women than men. Conclusion: Because of the high frequency and intensity of childhood traumas among alcohol- or other drug-dependent patients and depressed patients, the assessment of problems due to childhood traumas among these patients is essential to a better understanding of the etiology of those disorders and to their treatment. © 2010 Elsevier Ltd. All rights reserved.

Fibronectin induces MMP2 expression in human prostate cancer cells

High-grade prostate cancers express high levels of matrix metalloproteinases (MMPs), major enzymes involved in tumor invasion and metastasis. However, the tumor cell lines commonly employed for prostate cancer research express only small amounts of MMPs when cultivated as monolayer cultures, in common culture media. The present study was conducted to ascertain whether culture conditions that include fibronectin can alter MMP2 and MMP9 expression by the human prostatic epithelial cell lines RWPE-1, LNCaP and PC-3. These cells were individually seeded at 2×104cells/cm2, cultivated until they reached 80% confluence, and then exposed for 4h to fibronectin, after which the conditioned medium was analyzed by gelatin zymography. Untreated cells were given common medium. Only RWPE-1 cells express detectable amounts of MMP9 when cultivated in common medium, whereas the addition of fibronectin induced high expression levels of pro and active forms of MMP2 in all tested cell lines. Our findings demonstrate that normal and tumor prostate cell lines express MMP2 activity when in contact with extracellular matrix components or blood plasma proteins such as fibronectin. Future studies of transcriptomes and proteomes in prostate cancer research using these cell lines should not neglect these important conclusions. © 2012 Elsevier Inc..

O controle concorrencial dos atos de concentração como instrumento de implementação de política pública estatal

Pós-graduação em Direito - FCHS

Toxicologia e psicofarmacologia em biologia e programas de saúde para o ensino médio

Pós-graduação em Educação para a Ciência - FC

Loucura: a temática que constrói o discurso da obra Hospício é Deus, de Maura Lopes Cançado

Pós-graduação em Letras - FCLAS