The effect of anisotropic emission on the log N-log S curve of gamma-ray bursts

Some models for Gamma-Ray Burst spectra result in anisotropic emission. Here the effects of anisotropy on the log N-log S curve are considered

The relation of the colors of the optical afterglow of GRB030329/SN 2003dh to other afterglows

We find that the color indices (B−V )0, (V −R)0, (R−I)0, (I −J)0 in the observer frame of the optical afterglow (OA) of GRB030329 during t−T0 12 days are plausibly matched only by those of SN 1998bw although SN 2003dh develops an excess light in the red/IR spectral region. We also emphasize the discordance with other Type-Ic SNe which are not known to be associated with GRBs. The colors thus can help us to resolve the synchrotron component from the contribution of SN and to discriminate between various types of SN (especially important for faint OAs). We also note that the strong concentration of color indices of the ensemble of 26 OAs (including GRB030329) suggests that the local reddening inside their host galaxies is quite similar and relatively small for these events

Study of time lags in HETE-2 Gamma-Ray Bursts with redshift: search for astrophysical effects and Quantum Gravity signature

The study of time lags between spikes in Gamma-Ray Bursts light curves in different energy bands as a function of redshift may lead to the detection of effects due to Quantum Gravity. We present an analysis of 15 Gamma-Ray Bursts with measured redshift, detected by the HETE-2 mission between 2001 and 2006 in order to measure time lags related to astrophysical effects and search for Quantum Gravity signature in the framework of an extra-dimension string model. The use of photon-tagged data allows us to consider various energy ranges. Systematic effects due to selection and cuts are evaluated. No significant Quantum Gravity effect is detected from the study of the maxima of the light curves and a lower limit at 95% Confidence Level on the Quantum Gravity scale parameter of 3.2x10**15 GeV is set.Comment: 4 pages, 5 figures. v3: Error corrected in Eq. 1. Results updated. Proceedings of the 30th ICRC, Merida, Mexico (2007

Analysis of the late phase of three optical afterglows of GRBs using color indices

We find that although the absolute magnitude of the optical afterglow (OA) of GRB011121 in the late phase (t − T0 > 10 days) is approximately consistent with that of the SN 1998bw-type supernova SN 2001ke, previously found by Garnavich P. M. et al. (ApJ, 582 (2003) 924), a good match of their colors occurs only for t − T0 = 13–23 days in the observer frame of GRB011121. We are able to constrain the possible SN in the OA of GRB010222 to be of the peculiar SN 1998bw or SN 2002ap type, but not of SNe classified as Type Ic in the database of Poznanski D. et al. (PASP, 114 (2002) 833). Neither colors nor absolute magnitude of the OA of GRB970508 in the late phase are consistent with those of any of the above-mentioned (sub)types of SN. These results imply that the bumps in the late phase of the OAs can be caused by several mechanisms. Color indices thus appear to be a powerful tool in the analysis of these phenomena, even for archival data of OAs

Asma em adultos : grau de conhecimentos sobre sua doença

Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias da SaudeObjetivou-se determinar o nível de conhecimentos que asmáticos hospitalizados têm sobre sua doença alem de oferecer subsídios para a criação de um centro para atendimento e educação destes pacientes e desenvolvimento de pesquisas nesta área. Foram estudados 43 asmáticos adultos internados em 3 hospitais de Florianópolis em crise de agudização de sua doença com idade média de 41,9 anos. Oitenta e seis por cento (86%) era portadores de asma moderada ou grave com evolução média da doença de 24,8 anos e em uso predominante de broncodilatadores. Dezoito (41,9%) tinham alguma noção do que era asma, doze (27,9%) conheciam o mecanismo de ação das drogas empregadas e 46% dos que usavam broncodilatores por via inalatória não usavam corretamente o nebulímetro dosificador. Somente 16,3% correlacionavam as crises agudas com a piora da doença. Apenas 32,5% faziam acompanhamento ambulatorial e cumpriam ordens médicas nos 6 meses que antecederam a internação. Cerca de metade dos pacientes foi orientado por seus médicos para evitar fatores desencadeantes da crise e como utilizar o nebulímetro. Conclue-se que os pacientes possuem poucos conhecimentos sobre sua doença e sobre a terapêutica usada além de terem controle inadequado de sua doença os resultados indicam a necessidade de criação de um centro de estudos multidisciplinar para assistência, educação continuada e pesquisas sobre asma

Seafood festivals for local development in Italy and Sweden

PurposeThe paper focusses on festivals taking place in coastal regions whose central element is seafood. The purpose is to analyse the role of seafood festivals as potential tourist attractions for local development. The decision to focus on coastal areas is based on a perceived knowledge gap regarding the interactions between different sectors of the sea economy.Design/methodology/approachQualitative exploratory case studies of seafood festivals in Italy and Sweden have been performed using an analytical model. The participatory observation methodology contributed to a better understanding of the phenomenon.FindingsThe analysis shows the close relationship between seafood and tourism, and although it takes variable forms, food is a fundamental lever for maritime and coastal tourism and local development. Findings suggest that local food events can help strengthening gastronomic identities, despite there is a different articulation between tradition and marketing in the two countries.Research limitations/implicationsSince this paper represents an exploratory study of five seafood festivals, research needs to be extended and replicated before any findings can be generalized. However, the model is flexible enough to be tested in different food events.Practical implicationsFood events represent a key instrument for the integration of territorial policies in which tourism and food products might be used as strategic instruments for the development of coastal areas.Originality/valueThis paper is a first attempt to analyse and compare seafood events, contributing to filling the gap in event literature referring to coastal areas. The model introduced can be used to determine the articulation of tradition-marketing in different food events