36 research outputs found
Efficacia della terapia con atorvastatina sui markers di stress ossidativo in pazienti con STEMI sottoposti a PTCA primaria
No full textPrognostic value of echocardiographic assessment of right ventricular function in patients with heart failure.
No full textPrognostic value of echocardiographic assessment of right ventricular function in patients with heart failure
No full textInfodemiological data of West-Nile virus disease in Italy in the study period 2004–2015
No full textAbstractGoogle Trends (GT) was mined from 2004 to 2015, searching for West-Nile virus disease (WNVD) in Italy. GT-generated data were modeled as a time series and were analyzed using classical time series analyses. In particular, correlation between GT-based Relative Search Volumes (RSVs) related to WNVD and “real-world” epidemiological cases in the same study period resulted r=0.76 (p<0.0001) on a monthly basis and r=0.80 (p<0.0001) on a yearly basis. The partial autocorrelation analysis and the spectral analysis confirmed that a 1-year regular pattern could be detected. Correlation between GT-based RSVs related to WNVD yielded a r=0.54 (p<0.05) on a regional basis. Summarizing, GT-generated data concerning WNVD well correlated with epidemiology and could be exploited for complementing traditional surveillance
Frobenius structure for rank one adic differential equations
No full textInternational audienceAccording to a criterion of B. Chiarellotto and G. Christol [Compositio Math. 100 (1996), no. 1, 77-99; MR1377409 (97b:14021)], a solvable rank one p-adic differential operator d/dx−g, with g=∑ni=1a−ixi, has a Frobenius structure if and only if a−1 is p-integral. Using natural estimates on tensor products, the author here generalizes this criterion to all g's in the Robba ring. As a corollary, he extends to the case p=2 the qualitative part of Matsuda's theorem [S. Matsuda, Duke Math. J. 77 (1995), no. 3, 607-625; MR1324636 (97a:14019)], according to which the Dwork-Robba twisted Artin-Hasse exponentials have Frobenius structures
Assessment of solid/liquid equilibria in the (U, Zr)O2+y system
No full textSolid/liquid equilibria in the system UO2eZrO2 are revisited in this work by laser heating coupled with
fast optical thermometry. Phase transition points newly measured under inert gas are in fair agreement
with the early measurements performed by Wisnyi et al., in 1957, the only study available in the literature
on the whole pseudo-binary system. In addition, a minimum melting point is identified here for
compositions near (U0.6Zr0.4)O2þy, around 2800 K. The solidus line is rather flat on a broad range of
compositions around the minimum. It increases for compositions closer to the pure end members, up to
the melting point of pure UO2 (3130 K) on one side and pure ZrO2 (2970 K) on the other. Solid state phase
transitions (cubic-tetragonal-monoclinic) have also been observed in the ZrO2-rich compositions X-ray
diffraction. Investigations under 0.3 MPa air (0.063 MPa O2) revealed a significant decrease in the melting
points down to 2500 Ke2600 K for increasing uranium content (x(UO2)> 0.2). This was found to be
related to further oxidation of uranium dioxide, confirmed by X-ray absorption spectroscopy. For
example, a typical oxidised corium composition U0.6Zr0.4O2.13 was observed to solidify at a temperature
as low as 2493 K.
The current results are important for assessing the thermal stability of the system fuel e cladding in an
oxide based nuclear reactor, and for simulating the system behaviour during a hypothetical severe
accident
X-ray spectroscopic study of the ADC source X1822-371
No full textWe analyse two Chandra HETGS (High Energy Transmission Grating Spectrometer) observations and one XMM-Newton observation. The HETGS and XMM/Epic-pn observed X 1822-371 for 140 and 50 ks, respectively. We extracted an averaged spectrum and five spectra from five selected orbital-phase intervals that are 0.04-0.25, 0.25-0.50, 0.50-0.75, 0.95-1.04; the orbital phase zero corresponds to the eclipse time. The spectra cover the energy band between 0.4 and 12 keV. We confirm the presence of local neutral matter that partially covers the X-ray emitting region; the equivalent hydrogen column is 3.5 × 1022 cm-2 and the covered fraction is around 60 %. We detected and identified several emission lines associated with He-like and H-like ions. The He-like transitions of O vu, Ne ix, Mg xi, Si xm show that the intercombination dominates over the forbidden and resonance lines. The fluxes of the lines are higher during the orbital-phase interval 0.04-0.75 while their intensities decrease during the dip and the eclipse. We discuss the presence of an optically thin corona with optical depth of 0.01 that scatters the luminosity from the inner region indetyfing it with the hot corona showed by [12] in the disc illuminated by a central sources. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence
Pteropoda (Gastropoda, Euthecosomata) from the Australian Cainozoic
No full textAll Tertiary euthecosomatous gastropods from the Australian continent known to the author are described. The species introduced by Ralph Tate (1887) are revised. Altogether 18 species are discussed. A new genus, Spoelia, and five new species, viz. Limacina curryi, L. lunata, L. tatei, Spoelia torquayensis and Vaginella victoriae, are introduced. Potential tools in the Australian pteropod fauna for a future biostratigraphical zonation and for long distance correlations are indicated. In an annex Vaginella sannicola sp. nov. is introduced for specimens from the Miocene of Gargano, Italy, which were incorrectly identified as V. eligmostoma Tate by d'Alessandro & Robba, 1980
A psychosocial approach to health promotion: reviewing the process of a support group on weight and eating
No full textFaz uma revisão da literatura sobre os modelos de promoção da saúde e as abordagens psicossociais da obesidade, discutindo as limitações desses modelos. Propondo a articulação da promoção da saúde com a abordagem psicossocial no quadro da vulnerabilidade e direitos humanos, desenvolveu-se um estudo de caso do processo de construção coletiva de um Grupo de Ajuda Mútua para a Discussão de Peso, Alimentação e Saúde (GAM-PAS), coordenado pela autora durante sua Iniciação Científica. O objetivo desse estudo foi descrever e analisar criticamente o processo de implementação dessa proposta, que surgiu entre participantes do grupo de reeducação alimentar acompanhado em estudo anterior no Centro de Promoção da Saúde do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (CPS-HC). O estudo de caso utilizou gravações das sessões de grupo que completavam as observações registradas em diário de campo sobre o dia a dia do processo. Os participantes do grupo foram recrutados através de divulgação do grupo em faixa, pela pesquisadora e por uma pessoa atendida no CPS-HC que aceitou atuar com multiplicadora da proposta em seu bairro. A análise do processo foi informada pela noção de sucesso prático e êxito técnico e pela abordagem psicossocial da vulnerabilidade comprometida com a proteção e promoção de direitos, incentivando soluções coletivas para dificuldades compartilhadas na vida vivida. As reuniões do GAM-PAS eram semanais e duravam cerca de duas horas. Descreve-se: o que foi planejado e o que aconteceu de fato; como era vivida a questão da alimentação e saúde na vida cotidiana das participantes; qual era o sentido do GAM-PAS nos termos de suas participantes. As participantes e a multiplicadora do GAM-PAS pareciam esperar que a pesquisadora oferecesse todas as informações que julgavam precisar para cuidar de sua alimentação e saúde, estranhando a proposta de intervenção aberta à sua contribuição. Ao longo das reuniões, entretanto, a multiplicadora e as participantes passaram a contribuir, transformando o espaço do GAM-PAS. Não foi possível evocar respostas coletivas para problemas que, a partir da abordagem psicossocial da vulnerabilidade à obesidade e ao excesso de peso, demandariam mobilização coletiva; nem ampliar a consciência do grupo sobre a violação do direito à alimentação adequada e à atenção à saúde integral a que deveriam ter acesso. Conclui-se que a crença socialmente compartilhada de que o cuidado com o corpo e saúde dependeria apenas de força de vontade individual dificulta o enfrentamento coletivo de dificuldades programáticas relacionadas à obesidade e ao excesso de peso. A falta de conhecimento da pesquisadora e membros do grupo sobre o funcionamento do Sistema Único de Saúde (SUS) não favorecia o reconhecimento do seu direito ao acesso à integralidade do cuidado e da prevenção no campo da alimentação. Acredita-se que a intervenção teria se beneficiado de um manejo da abordagem psicossocial mais radicalmente comprometido com o quadro da vulnerabilidade e dos direitos humanos. Ressalta-se a importância de uma formação para o psicólogo social que compreenda o funcionamento do SUS e o trabalho em equipes multi-disciplinares, considerando contextos de desigualdade social e violação de direitosPresents a literature review on health promotion models and the psychosocial approaches on obesity, discussing these models limitations. Proposing an articulation between health promotion and the psychosocial approach of the vulnerability and human rights framework, a case study of the collective construction of a mutual aid group on weight, eating and health (GAM-PAS), coordinated by the author as part of her undergraduate research, is developed. The objective of this study was to describe and analyze the implementation process of this proposal, which was created from the suggestions of the participants of the nutrition education group of the Health Promotion Center of the General Clinic Service of the Medical College of the University of São Paulo (CPS-HC). The case study has utilized group session recordings in addition to the observations recorded on a field journal of the process. The groups participants were recruited through banner ads, made by the researcher and by one of the participants of the CPS-HC group, a woman who accepted being the multiplier of this proposal on her neighborhood. The process analysis was informed by the notion of practical success and technical efficacy and by the psychosocial approach on vulnerability committed to the protection and promotion of rights, stimulating collective solutions to the shared difficulties of the lived life. The GAM-PAS had two-hour weekly meetings. The following are described: what was planned and what really happened; how the eating and health issues were experienced in the participants daily lives; what was the meaning of the GAM-PAS in the terms of its participants. The participants and the multiplier of the GAM-PAS seemed to expect the researcher to supply them with all the information they deemed necessary to take care of their eating and health, not expecting an intervention proposal open to their contribution. However, throughout the meetings, the multiplier and the participants began to contribute, transforming the space of the GAM-PAS. It wasnt possible to generate collective responses to problems which, from a psychosocial approach on vulnerability to obesity and overweight, would require a collective movement; neither was it possible to broaden the groups consciousness on the violation of the rights to adequate food and to full health attention to which they were supposed to have access. The socially shared belief that the care to both body and health would depend only on the individual willpower is assumed to decrease the possibility of a collective approach to the programmatic difficulties related to obesity and overweight. The lack of knowledge of both the researcher and the groups participants of the operation of the Brazils National Health System (SUS) didnt help the acknowledgment of their rights of access to integral care and prevention on eating issues. It is believed that this intervention would have benefitted from a psychosocial approach handling more radically committed to the vulnerability and human rights framework. It is highlighted the importance of including the SUS framework and work in multidisciplinary teams into the education of the social psychologist, considering social inequality and violation of rights context
Laser-heating and radiance spectrometry for the study of nuclear materials in conditions simulating a nuclear power plant accident
No full textMajor and severe accidents have occurred three times in nuclear power plants (NPPs), at Three Mile Island (USA, 1979), Chernobyl (former USSR, 1986) and Fukushima (Japan, 2011). Research on the causes, dynamics, and consequences of these mishaps has been performed in a few laboratories worldwide in the last three decades. Common goals of such research activities are: the prevention of these kinds of accidents, both in existing and potential new nuclear power plants; the minimization of their eventual consequences; and ultimately, a full understanding of the real risks connected with NPPs. At the European Commission Joint Research Centre’s Institute for Transuranium Elements, a laserheating and fast radiance spectro-pyrometry facility is used for the laboratory simulation, on a small scale, of NPP core meltdown, the most common type of severe accident (SA) that can occur in a nuclear reactor as a consequence of a failure of the cooling system. This simulation tool permits fast and effective high-temperature measurements on real nuclear materials, such as plutonium and minor actinide-containing fission fuel samples. In this respect, and in its capability to produce large amount of data concerning materials under extreme conditions, the current experimental approach is certainly unique. For current and future concepts of NPP, example results are presented on the melting behavior of some different types of nuclear fuels: uranium-plutonium oxides, carbides, and nitrides. Results on the high-temperature interaction of oxide fuels with containment materials are also briefly shown.RST/Reactor Physics and Nuclear Material
