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Search Results: 1 - 10 of 325303 matches for " S. Capelli "
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Cuoricino last results and Cuore R&D
S. Capelli on behalf of
Physics , 2005,
Abstract: CUORICINO is a bolometric experiment on Neutrinoless Double Beta Decay (DBD0n) of 130Te.It consists of an array of 62 TeO2 crystals with a total mass of ~ 40.7 kg.While being a self consistent experiment CUORICINO is also a good test for the feasibility of the next generation experiment CUORE, ~ 750 kg of TeO2 bolometric mass.In this paper last results from CUORICINO and prospects for the future CUORE.
Pancreatic Head Mass: What Can Be Done? Classification: The Pathological Point of View
Zamboni G,Capelli P,Pesci A,Beghelli S
JOP Journal of the Pancreas , 2000,
Abstract:
Cytoskeleton actin changes in IL-2 activated cells
E Capelli,R Nano,S Panelli,L Sciola
European Journal of Histochemistry , 2009, DOI: 10.4081/1591
Abstract: In the present study we analysed the changes in cytoskeletal actin in lymphoid cells following IL-2 activation and during cell interactions by means of light and electron microscopy, immunofluorescence and molecular analysis. By morphological analysis we observed a higher fluorescence in the activated cells than in the quiescent ones with no modifications in the cytoskeleton pattern comparing activated to resting cells. The results of molecular analysis indicate that, after IL-2 activation, there is a reorganisation of the actin component of the cell cytoskeleton accompanied by the differential expression of the corresponding genes. A future study will be extended to the analysis of others components of the cytoskeleton network.
CdWO4 bolometers for Double Beta Decay search
L. Gironi,C. Arnaboldi,S. Capelli,O. Cremonesi,M. Pavan,G. Pessina,S. Pirro
Physics , 2008,
Abstract: In the field of Double Beta Decay (DBD) searches the possibility to have high resolution detectors in which background can be discriminated is very appealing. This very interesting possibility can be largely fulfilled in the case of a scintillating bolometer containing a Double Beta Decay emitter whose transition energy exceeds the one of the natural gamma line of 208Tl. We present the latest results obtained in the development of such a kind of scintillating bolometer. For the first time an array of five CdWO4 (116Cd has a Double Beta Decay transition energy of 2805 keV) crystals is tested. The array consists of a plane of four 3x3x3 cm3 crystals and a second plane consisting of a single 3x3x6 cm3 crystal. This setup is mounted in hall C of the National Laboratory of Gran Sasso inside a lead shielding in order to reduce as far as possible the environmental background. The aim of this test is to demonstrate the technical feasibility of this technique through an array of detectors and perform a long background measurement in the best conditions in order to prove the achievable background in the Zero neutrino-DBD region.
Scintillating double beta decay bolometers
S. Pirro,J. W. Beeman,S. Capelli,M. Pavan,E. Previtali,P. Gorla
Physics , 2005, DOI: 10.1134/S1063778806120155
Abstract: We present the results obtained in the development of scintillating Double Beta Decay bolometers. Several Mo and Cd based crystals were tested with the bolometric technique. The scintillation light was measured through a second independent bolometer. A 140 g CdWO_4 crystal was run in a 417 h live time measurement. Thanks to the scintillation light, the alpha background is easily discriminated resulting in zero counts above the 2615 keV gamma line of Thallium 208. These results, combined with an extremely easy light detector operation, represent the first tangible proof demonstrating the feasibility of this kind of technique.
Characterization of ZnSe scintillating bolometers for Double Beta Decay
C. Arnaboldi,S. Capelli,O. Cremonesi,L. Gironi,M. Pavan,G. Pessina,S. Pirro
Physics , 2010, DOI: 10.1016/j.astropartphys.2010.09.004
Abstract: ZnSe scintillating bolometers are good candidates for future Double Beta Decay searches, because of the 82Se high Q-value and thanks to the possibility of alpha background rejection on the basis of the scintillation signal. In this paper we report the characteristics and the anomalies observed in an extensive study of these devices. Among them, an unexpected high emission from alpha particles, accompanied with an unusual pattern of the light vs. heat scatter plot. The perspectives for the application of this kind of detectors to search for the Neutrinoless Double Beta Decay of 82Se are presented.
Fe Ka line emission from the Arches cluster region - evidence for ongoing particle bombardment?
R. Capelli,R. S. Warwick,D. Porquet,S. Gillessen,P. Predehl
Physics , 2011, DOI: 10.1051/0004-6361/201116574
Abstract: We present the results of eight years of XMM-Newton observations of the region surrounding the Arches cluster in the Galactic Center. We study the spatial distribution and temporal behaviour of the Fe-Ka line emission with the objective of identifying the likely source of the excitation. We investigate the variability of the 6.4-keV line emission of four clouds through spectral fitting of the EPIC MOS data with the use of a modelled background, which avoids many of the systematics inherent in local background subtraction. We also employ spectral stacking of both EPIC PN and MOS data to search for evidence of an Fe-K edge feature imprinted on the underlying X-ray continuum. The lightcurves of the Fe-Ka line from three bright molecular knots close to the Arches cluster are found to be constant over the 8-year observation window. West of the cluster, however, we found a bright cloud exhibiting the fastest Fe-Ka variability yet seen in a molecular cloud in the Galactic Center region. The time-averaged spectra of the molecular clouds reveal no convincing evidence of the 7.1-keV edge feature. The EW of the 6.4-keV line emitted by the clouds near the cluster is found to be ~1.0 keV. The observed Fe-Ka line flux and the high EW suggest the fluorescence has a photoionization origin, although excitation by cosmic-ray particles is not specifically excluded. For the three clouds nearest to the cluster, an identification of the source of photo-ionizing photons with an earlier outburst of Sgr A* is however at best tentative. The hardness of the nonthermal component associated with the 6.4-keV line emission might be best explained in terms of bombardment by cosmic-ray particles from the Arches cluster itself. The relatively short-timescale variability seen in the 6.4-keV line emission from the cloud to the West of the cluster is most likely the result of illumination by a nearby transient X-ray source.
The X-ray lightcurve of Sgr A* over the past 150 years inferred from Fe-Ka line reverberation in Galactic Centre molecular clouds
R. Capelli,R. S. Warwick,D. Porquet,S. Gillessen,P. Predehl
Physics , 2012, DOI: 10.1051/0004-6361/201219544
Abstract: We examine the temporal and spectral properties of nine Fe-Ka bright molecular clouds within about 30 pc of Sgr A*, in order to understand and constrain the primary energising source of the Fe fluorescence. Significant Fe-Ka variability was detected, with a spatial and temporal pattern consistent with that reported in previous studies. The main breakthrough that sets our paper apart from earlier contributions on this topic is the direct measurement of the column density and the Fe abundance of the MCs in our sample. We used the EW measurements to infer the average Fe abundance within the clouds to be 1.6$\pm$0.1 times solar. The cloud column densities derived from the spectral analysis were typically of the order of 10$^{23}$ cm$^{-2}$, which is significantly higher than previous estimates. This in turn has a significant impact on the inferred geometry and time delays within the cloud system. Past X-ray activity of Sgr A* is the most likely source of ionisation within the molecular clouds in the innermost 30 pc of the Galaxy. In this scenario, the X-ray luminosity required to excite these reflection nebulae is of the order of 10$^{37}-10^{38}$ erg s$^{-1}$, significantly lower than that estimated for the Sgr B2 molecular cloud. Moreover, the inferred Sgr A* lightcurve over the past 150 years shows a long-term downwards trend punctuated by occasional counter-trend brightening episodes of at least 5 years duration. Finally, we found that contributions to the Fe fluorescence by X-ray transient binaries and cosmic-ray bombardment are very likely, and suggest possible ways to study this latter phenomenon in the near future.
Qualidade do valor da medida de massa corporal nos Centros Municipais de Saúde do Município do Rio de Janeiro, 1996
Capelli, Jane de Carlos Santana;Anjos, Luiz Antonio dos;Castro, Inês Rugani Ribeiro de;
Cadernos de Saúde Pública , 2002, DOI: 10.1590/S0102-311X2002000100007
Abstract: the main purpose of the study was to evaluate the quality of body mass measurement of children under 5 years of age treated in 21 health care units in the city of rio de janeiro. a total of 38 health care professionals were observed, 292 children were weighed, and 41 scales were calibrated. almost all of the mechanical scales were positioned improperly. the procedure of weighing the child "undressed" was not performed in 29.9% of the cases on adult beam scales. almost all of the scales were calibrated (98%) and showed a high correlation coefficient (0.999). there were no important differences between body mass values obtained by the health care professionals and those read by the observer. thus, nutritional classification using either value showed a perfect correlation (kappa correlation coefficient = 1). although some procedures in obtaining body mass values were unsatisfactory, they did not affect the nutritional classification of children in the present study.
Qualidade do valor da medida de massa corporal nos Centros Municipais de Saúde do Município do Rio de Janeiro, 1996
Capelli Jane de Carlos Santana,Anjos Luiz Antonio dos,Castro Inês Rugani Ribeiro de
Cadernos de Saúde Pública , 2002,
Abstract: O estudo objetivou avaliar a qualidade do valor da medida de massa corporal de crian as menores de cinco anos atendidas nos Centros Municipais de Saúde (CMS) do Município do Rio de Janeiro. Observaram-se 38 profissionais de saúde realizando as atividades de medi o da massa corporal de 292 crian as atendidas num turno de atendimento de cada um dos 21 CMS, sendo calibrados 41 equipamentos de pesagem. As balan as mecanicas (pediátricas ou de plataforma), na sua grande maioria, estavam inadequadamente posicionadas. Os procedimentos básicos de medi o em equipamentos mecanicos n o foram realizados de forma correta na maior parte das vezes. O procedimento de "despir a crian a" n o foi realizado em 29,9% nas balan as de plataforma e, dos realizados, 42,3% o foram incorretamente. Houve pequenas diferen as entre os valores de massa corporal produzidos pelos profissionais de saúde e os lidos pelo observador, n o alterando a classifica o nutricional que mostrou concordancia perfeita (coeficiente de Kappa = 1). Apesar de alguns resultados n o estarem satisfatórios para a produ o do valor da medida de massa corporal na rotina dos servi os, os valores produzidos pelos profissionais de saúde n o comprometeram as classifica es nutricionais das crian as avaliadas neste estudo.
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