Receptor de dois canais para balizas de satélite

Mestrado em Engenharia Electrónica e TelecomunicaçõesO presente trabalho descreve o desenvolvimento do hardware para um detector digital de dois canais para balizas de satélite. O detector baseia-se na digitalização de uma frequência intermédia (FI) por uma ADC de elevada taxa de amostragem, integrados para processamento digital de sinal programáveis em tempo real e uma DSP (Digital Signal Processor) que permite a implementação de algoritmos para seguimento e detecção de sinal. Para facilitar a integração do detector com a parte analógica apresenta-se também uma DDS (Direct Digital Synthesizer) que pretende servir de oscilador local a montante do detector. Descreve-se a arquitectura do sistema, a respectiva implementação e metodologia usada na resolução dos problemas que envolveu o uso de equipamentos de teste e pequenos trechos de software. São apresentados ainda os resultados principais do desempenho do detector que compreendem linearidade de amplitude, fase diferencial, patamar de ruído e isolamento. A qualidade espectral da risca obtida por síntese directa é apresentada e discutida. O detector apresenta um excelente desempenho a vários níveis não comprometendo qualquer característica dos sinais a detectar. Com o software apropriado afigura-se que poderá substituir de forma clara a tradicional solução analógica. ABSTRACT: The work describes de development of dual channel digital beacon detector. The detector is based on the high speed sampling of an intermediate frequency (IF), digital receiver signal processors chips that can be programmed in real time and a DSP (Digital Signal Processor) that implements tracking and detection algorithms. A DDS (Direct Digital Synthesis) synthesiser is also present as it can be used as an analogue local oscillator in the preceding analogue receiver chains. The architecture, implementation and methodology used in hardware problems solving that used several types of instrumentation and DSP testing codes are described in detail. The performance of detector concerning linearity, differential phase, noise floor and crosstalk is presented. The spectral line of the DDS output is also analysed. The detector is performing very well and seems by itself that the digitalization is not degrading the original signal. By implementing suitable algorithms a clear advantage is expected over the analogue solution

MedTROP - Directory of Tropical Medicine and International Public health in Open access for Sustainable Development: Basis for a proposal

MedTROP Project is a partnership between the Institute of Hygiene and Tropical Medicine (IHMT) in Portugal and the National School of Public Health/Oswaldo Cruz Foundation, Rio de Janeiro in Brazil. It aims to make science accessible to citizens and the data of research in the domain of tropical medicine and public health in future reusable giving a contribute to the sustainable development of society within the framework of the “2030 Agenda for Development Sustainable “. It focuses on three different work areas: Contents: Development of a Directory on Tropical Medicine and International Public Health in Open Access, encouraging Portuguese as a language of Science. Health Literacy: Improve the skills of health professionals regarding the prevention, control and eradication of tropical diseases, providing information in open access and providing information literacy and research programs; Citizen Literacy and Communication: Creation of communication and information channels from science to citizens by disseminating the results of research to the public, researchers, policy makers and local communities

HOT WIRE METHOD FOR THE THERMAL CHARACTERIZATION OF MATERIALS: INVERSE PROBLEM APPLICATION

An experimental set-up of the hot wire method is presented. The present design allows the measurement of the temperatures at two different points on the heating wire with an acquisition system that performs measurements at a frequency of 1kHz with a 12 bit numerical converter. An analytical solution for the direct model for the time dependent problem of heat transfer is employed. It is based on the quadrupole method which basically consists in a transfer matrix approach which is possible through the use of Laplace transforms. It extends the electrical analogy of heat transfer problems using the notion of impedance, and allows to take into account the thermal behavior of the wire, as well as contact resistance and heat loss effects in a very simple straightforward way. In the identification process carried on the temperature experimental data relies on a sampling of the data that is logarithmically spaced in time. The initial guesses for the thermal conductivity values are obtained applying the well known and ideal model of the linear temperature evolution versus the logarithm of the time. These values are used to start up the algorithms that are applied in the minimization of the cost functional of the squared residues between measured and calculated temperatures. The precision of the estimates is assessed with the calculated confidence bounds obtained by the variance-covariance matrix at the converged solution

Limpets (Patella and Haliotis) aquaculture in the Azores.

43rd European Marine Biology Symposium. Ponta Delgada, Açores, 8-12 de Setembro de 2008

Parasternum pleural-cutaneous fistula in a severely immunosuppressed HIV-positive patient

AbstractPleural tuberculosis occurs in 30% of patients with tuberculosis, and the percentage of patients with tuberculosis pleural effusions is comparable to human immunodeficiency virus HIV-positive and HIV-negative individuals, although pleural tuberculosis is rare in HIV-positive patients with CD4+ counts < 200 cells/mm3. Pleural tuberculosis in HIV-positive patients is likely to happen in young patients, and is more frequent in intravenous drug abusers, with more acid-fast bacilli identifiable in pleural tissue. We report a rare case of pleural tuberculosis in a severely immunosuppressed HIV-positive patient, presented as two parasternum pleural-cutaneous fistula

ANESTESIA NO PARTO HUMANIZADO: APLICAÇÕES DAS NORMAS PRECONIZADAS PELA ORGANIZAÇÃO MUNDIAL DA SAÚDE

A modificação da visão a respeito do nascimento, estimulou a criação pela OMS de normas humanizadas que estabelecem ações para alcançar o protagonismo da mãe nas decisões sobre seu corpo durante o processo do parto. Situações que inibem o mal-estar da mulher, que reduzem riscos para ela e para o recém-nascido e que possibilitam conforto para o acompanhante, representam a humanização. Neste contexto, buscamos neste trabalho, relacionar a anestesia como garantia do parto humanizado, pois, o alívio da dor e do sofrimento, qualquer que seja sua natureza, tornou-se compromisso do médico. Metodologia: Revisão bibliográfica nas bases de dados Scielo e PubMed. Resultados e discussão: O anestesiologista é parte fundamental do processo de humanização do atendimento à gestante. Sua participação se inicia na pré-analgesia, expondo as diversas modalidades anestésicas, riscos e benefícios, incentivando a participação da mãe e da família. Analgesias espinhais constituem as técnicas padrão-ouro na prática clínica atual. Existem contraindicações para sua realização e uma delas é a recusa da gestante, como alternativa tem-se a PCA, a qual pode alcançar melhor qualidade com uso de menores doses, menor incidência de efeitos colaterais maternos e menor transferência placentária, além de maior satisfação da parturiente, pela sensação de controle da administração do anestésico diminuir a ansiedade e a quantidade de analgésicos utilizados. Conclusão: Diante de um cenário da humanização do parto palpável, ressaltamos a importância da educação e do esclarecimento que resgatem da participação ativa do casal e o combatam o despreparo cultural da gestante e da família que permite imposições dos profissionais da saúde.PALAVRAS-CHAVE: Analgesia Controlada pelo Paciente; Parto Humanizado; Analgesia Epidur

Aquaculture of the clam (Tapes decussatus) on a closed system.

43rd European Marine Biology Symposium. Ponta Delgada, Açores, 8-12 de Setembro de 2008

Prelabor cesarean section: the role of advanced maternal age and associated factors

OBJECTIVE to evaluate whether advanced maternal age (AMA) is associated with prelabor cesarean section and to identify the factors associated with prelabor cesarean section in AMA women, according to the mode of type of labor financing (private or public). METHODS Based on the Birth in Brazil survey, the research was conducted on representative sample of mothers for the country (Brazil), regions, type of hospital and location (capital or not), in 2011/2012. This study included 15,071 women from two age groups: 20–29 years and ≥ 35 years. The information was collected from interviews with puerperal woman, prenatal cards, and medical records of mothers and newborns. Multiple logistic regression modelling was used to verify the association between prelabor cesarean section and maternal, prenatal and childbirth characteristics, according to the mode of financing. RESULTS Our results showed a higher use of prelabor cesarean section for AMA (≥ 35 years) women in the public service (OR = 1.63; 95%CI 1.38–1.94) and in the private service (OR = 1.44; 95%CI 1.13–1.83), compared with women aged 20–29 years. In the adjusted model, we recorded three factors associated with the prelabor cesarean section in AMA women in both, public and private sectors: the same professional in prenatal care and childbirth (OR = 4.97 and OR = 4.66); nulliparity (OR = 6.17 and OR = 10.08), and multiparity with previous cesarean section (from OR = 5.73 to OR = 32.29). The presence of obstetric risk (OR = 1.94; 95%CI .44–2.62) also contributed to the occurrence of prelabor cesarean section in women who gave birth in the public service. CONCLUSIONS AMA was an independent risk factor for prelabor cesarean in public and private services. In the public, prelabor cesarean in AMA was more influenced by clinical criteria. Higher chance of prelabor cesarean section in nulliparous women increases the chance of cesarean section in multiparous women, as we showed in this study, which increases the risk of anomalous placental implantation

Pharmacists in dispensing drugs (PharmDisp): protocol for a clinical trial to test the effectiveness of distance education in training pharmacists for dispensing drugs

Dispensing drug is a moment in which the pharmacist is able to analyze pharmacotherapy and contribute to its rational use. However, research has shown that some pharmacists lack adequate knowledge to perform this service. This study aims to describe a research protocol for a clinical trial to test the effectiveness of a distance learning program to train pharmacists in dispensing drugs. This is a protocol for an open diagnostic, non-randomized, single group clinical trial. A 12-week duration distance learning course was structured on the Moodle platform for training community pharmacists who are registered in the Regional Board of Pharmacy and work as employees or owners in Brazilian community pharmacies. The course curricula involves concepts and practice of dispensing drugs applied to the treatment of hypertension, diabetes mellitus, dyslipidemia and asthma. Pharmacists are divided randomly into groups, to which previously selected tutors give directions to the discussion and clarify questions. A validated questionnaire is being used before and after the course to measure participants’ knowledge. Participant satisfaction with the course is also being measured. Pharmacists who work in the study headquarters municipality receive two visits from a mystery shopper, before and after the course, to evaluate their performance in dispensing drugs. The virtual platform and the content of the course material were evaluated by judges. The study has been approved by the Research Ethics Committee of the School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo. The sample size was estimated to provide desired power for testing the significance of the difference between baseline-to-endpoint change scores. Information about the course is being released through channels such as social networks. The results will be submitted for publication in scientific journals, but information enabling the identification of the study subjects will be kept confidential. The trial has been registered in The Brazilian Clinical Trials Registry with number RBR7mbrp3 on January 15th, 2015