Articles — Recent

Understanding the physiological role of lipids in cell membranes is strictly coupled to determination of their impact on membrane structure using well-defined lipid-only model systems. Elastic and inelastic scattering experiments using neutrons or X-rays are non-invasive, probe-free techniques that provide such insight and have been advanced significantly in the past years. In particular recent developments allow to study details of structure, elasticity and interactions in phase-separated systems mimicking membrane rafts. We review the basic concepts underlying these developments. Written using the LaTeX template for Royal Society of Chemistry (RSC) journals

!TEX encoding = UTF-8 Unicode LaTeX Template: Curriculum Vitae Source: http://www.howtotex.com/ Feel free to distribute this template, but please keep the referal to HowToTeX.com. Date: July 2011

The Beamer class comes with a number of default slide themes which change the colors and layouts of slides.

Beamer Presentation LaTeX Template Version 1.0 (10/11/12) This template has been downloaded from: http://www.LaTeXTemplates.com License: CC BY-NC-SA 3.0 (http://creativecommons.org/licenses/by-nc-sa/3.0/)

Em um estudo conduzido por pesquisadores da Fundação Pró-Sangue, em São Paulo, tem-se interesse em avaliar o tempo até a ocorrência de anemia em doadores de repetição. No entanto, profissionais da área médica reconhecem a existência de um grupo de doadores não suscetíveis à anemia por doações, os superdoadores. A ocorrência da anemia é definida com base em avaliações periódicas do hematócrito anterior às doações, caracterizando assim a censura intervalar do evento de interesse. São considerados para análise dois modelos semiparamétricos que contemplam tal estrutura de censura e a existência de uma proporção de indivíduos não suscetíveis. O primeiro modelo, proposto por \citeasnoun{Shen}, trata-se de um modelo de tempo de promoção com estimação baseada em uma variação do algoritmo EM para dados com censura intervalar.\citeasnoun{Lam} consideram um modelo de fragilidade com distribuição contínua positiva e massa no ponto zero para contemplar indivíduos não suscetíveis, caracterizando também a heterogeneidade das condições de saúde dos pacientes suscetíveis. Os modelos foram aplicados em dados que abrangem doações realizadas entre janeiro de 2003 e dezembro de 2006.

ALSO AT https://www.overleaf.com/2407528pjqwrc

This resume may be updated anytime.

Report

AKARI and Spinning Dust: A look at microwave dust emission via the Infrared Aaron C. Bell's Master's Course Thesis ABSTRACT: Rapidly spinning dust particles having a permanent electric dipole moment have been shown to be a likely carrier of the anomalous microwave emission (AME), a continuous excess of microwave flux in the 10 to 90 GHz range. Small grains, possibly polycyclic aromatic hydrocarbons (PAHs), are a leading suspect. In the absence of a definitive answer on the presence of PAHs or their role as an AME carrier, some predictions have been made as to the implications of spinning PAH emission. Due to the overlap between the CMB and the galactic foreground, this topic is requiring cosmologists to consider the ISM with more care. ISM astronomers are also needing to consider the contribution of cosmological radiation to large-scale dust investigations. We present data from AKARI/Infrared Camera (IRC) due to the effective PAH band coverage of its 9 micron survey to investigate their role within the 98 AME candidate regions identified by Planck Collaboration et al. (2014). We supplement AKARI data with the four Infrared Astronomical Satellite (IRAS) all-sky maps and complement with the Planck High Frequency Instrument (HFI) bands at 857 and 545 GHz to constrain the full dust thermal spectral energy distribution (SED). We sample the average spectral energy distributions (SEDs) all 98 regions. We utilize all 7 AKARI photometric bands, as well as the 4 IRAS bands and 2 HFI. We carry out a modified blackbody fitting, and estimate the optical depth of thermal dust at 250 micron, and compare this to AME parameters. We also show plots of each band's average intensity for all 98 regions vs. AME parameters. We find a positive trend between the optical depth and AME. In the band-by-band comparison the AKARI 9 micron intensity shows a weaker trend with AME. In general, the MIR correlates less strongly with AME than the FIR. The optical depth vs. AME trend improves slightly when looking only at significant AME regions. Scaling the IR intensities by the ISRF strength G0 does not improve the correlations. A slightly positive trend found previously among 10 AME regions vs. AME significance is revisited, using the larger sample of 98. However the trend does not hold up to the full data set. We cannot offer strong support of a spinning dust model. The results highlight the need for full dust SED modelling, and for a better understanding of the role that magnetic dipole emission from dust grains could play in producing the AME.