108 research outputs found
Gas-liquid chromatographic method for the determination of peracids in the presence of a large excess of hydrogen peroxide. Part 2. Determination in alkaline solutions
No full textCurrent Status of the Copper High-β QWR Cavities and Plates Niobium Deposition for the ALPI Upgrade Project in the Framework of the SPES Facility
No full textThe ALPI linac will be used in the SPES facility for
acceleration and re-acceleration of the radioactive beam of
interest. The ALPI linac in Legnaro National Laboratories
is in an upgrade stage in order to fit the SPES facility
requirements. One of the main scenarios of the upgrade is
implementation of two cryostats in high-β section of the
linac.
Development and modification of the Nb/Cu sputtering
technology for production of the high-β QWR cavities and
plates has been performed for several years in INFN LNL.
The latest results of the cavities and plates niobium
deposition will be described in this paper
Allylstannation of alfa-, beta- and gamma-diketones mediated by allyldibutyltin halides: Bu2(2CH=CHCH2)SnCl and Bu(2CH=CHCH2)SnCl2
No full textButane-2,3- (la), pentane-2,4- (Ib) and hexane-2,5-dione (Ic) react with Bu-2(CH2=CHCH2)SnCl in the presence of water to give monoallylated keto-ols (2a, 2b) and/or diallylated diols (3a, 3b, 3c), this depending upon the employed molar ratio [diketone]/[allyltin chloride]. Bu(CH2=CHCH2)SnCl2 reacts with neat Ic in a one-pot synthesis to give mixtures of heterocyclic compounds: 2,5-diallyl-2,5-dimethyltetrahydrofuran (4), and 3-chloro-1,5-dimethyl-8-oxabicyclo [3,2,1] octane (5). Compound 4 is also obtained in high yield from the corresponding diol 3c by cyclodehydration promoted by RSnCl3 (R = Me and Bu
CESAREAN SECTION RATES IN ITALIAN REGIONS: 1998-2002
No full textCesarean section (c-section) rates have been increasing in many countries, and too frequently this rise does
not seem to be justified by clinical grounds. To reduce c-section rates and achieve a proportion of 20% is
among the goals of the Italian National Health Plan. In the following paper we provide an update on the
distribution of rates amongst Italian regions and describe the association between regional hospital
volumes and c-section rates. The national c-section rate increased from 31% in 1998 to 36% in 2002. The
rates varied among regions and ranged from 20% in the Province of Bolzano to 56% in Campania. A
significant association was observed between the regional hospital volumes for deliveries an
Protamines V. Synthesis of three fragments spanning the entire sequence of [peronithine] thynnine Z1
No full textDesenvolvimento de uma biblioteca para sistemas de visão estereoscópia para robótica móvel
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.A demanda por aplicações de robótica móvel vem crescendo consideravelmente nos últimos anos. Independente da natureza ou fim, robôs autônomos móveis devem interagir com o mundo para alcançar seus objetivos. Para isto, de alguma maneira precisam obter informações a respeito do ambiente. Dentre diferentes abordagens existentes, bons resultados têm sido alcançados pelo emprego de sistemas de visão estereoscópica. Através de um sistema como este é possível extrair informação tridimensional do meio em que o robô está inserido. A informação tridimensional pode então ser usada para orientar as ações do robô, seja para navegação, reconhecimento ou manipulação. No presente trabalho é apresentado o desenvolvimento de uma biblioteca para sistemas de visão estereoscópica para robótica móvel. Para tal, foram tratados diferentes problemas da estereoscopia, procurando prover mapas de profundidade com detalhes do ambiente suficientes para a operação geral de um robô móvel que tenha um sistema de visão estereoscópica como principal fonte de informação. Neste contexto, são avaliados e propostos modelos, métodos e soluções para diferentes problemas como calibração de câmeras, retificação de imagens, reconstrução e, principalmente, geração de mapas de profundidade densos. Os resultados obtidos demonstram a efetividade da utilização da infra-estrutura disponibilizada e dos métodos propostos no desenvolvimento de aplicações para robótica móvel
Ethnic variation in the prevalence of depression and anxiety in primary care: A systematic review and meta-analysis.
No full textPrimary care plays a key role in the detection and management of depression and anxiety. At present it is not clear if the prevalence of depression and anxiety in primary care differs between migrants and ethnic minorities (MI) and natives and ethnic majorities (MA). A systematic review and a meta-analysis of studies comparing the prevalence of depression and anxiety in MI and MA in primary care were performed. Studies were identified by searching MEDLINE, PsychINFO, EMBASE and through hand-search. We included 25 studies, most of which had a relatively small sample size. Significant variations were found in the prevalence of anxiety and depression across studies. Pooled analyses were carried out for 23 studies, based on random-effects models. Pooled RR of depression and anxiety in MI were 1.21 (95% CI 1.04-1.40, p=0.012) and 1.01 (95% CI 0.76-1.32, p=0.971), with high heterogeneity (I2=87.2% and I2=73%). Differences in prevalence rates among studies can be accounted for by inclusion criteria, sampling methods, diagnostic instruments and study design. Further research on larger samples and with culturally adapted instruments is needed to estimate the prevalence of depression and anxiety in MI seeking help for these disorders
Tomografia computerizzata multistrato per la diagnostica della patologia coronarica. Revisione sistematica della letteratura
No full texthttp://asr.regione.emilia-romagna.it/wcm/asr/collana_dossier/doss121/link/doss121.pd
The value of scientific literature on MultiSlice Computed Tomography in the diagnosis of coronary artery disease: systematic review and meta-analysis
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