Port of JMF to JME-CDC

Estágio realizado na Sun Microsystems Ireland IncTese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 200

Efficiency Improvement and Potential LCOE Reduction with an LFR-XX SMS Plant with Storage

Several forms of renewable energy have in the last decade achieved a remarkable technological improvement and cost effectiveness, including Solar Energy. Photovoltaic systems (PV) are reaching grid parity in the sunniest regions of Europe. Apart from PV, a promising technology is Concentrated Solar Power (CSP) with thermal storage, because it enables higher power plant availability throughout the year as well as dispatchability, a highly important and valuable feature for a power plant. However significant cost reductions are still to be achieved, for CSP to be competitive with conventional electricity production and with PV. In this paper a few technological improvements are described and a proposal is made to combine them in a system that is more efficient and has, simultaneously, the potential of being cheaper. The goal is to show the potential for advanced LFR concepts in combination with high temperature molten salt mixtures and energy storage as being also important contenders to the objective of bringing STE- Solar Thermal Electricity to the market in a competitive way. The concept presented and developed includes a higher ΔT of the heat transfer fluid (HTF), a particular storage strategy and a new optical concept based on a new Linear Fresnel Concentrator (LFR XX SMS-Simultaneous Multiple Surface, Fig.1,2, [1] enabling an important increase in the overall yearly solar to electricity conversion efficiency and generating an important potential for electricity cost reduction. It is shown that values approaching 10eurocents/kWh, for a 50MW plant with 7 hours storage capacity are possible in Southern Europe

Increasing the Cost Effectiveness of CSP Technologies Through the Development of a New CLFR “Etendue Matched” Collector

A new CLFR “Etendue Matched” is a promising CSP technology to achieve a better cost effectiveness with a lower levelized cost per m2 . This new technology can significantly reduce shading and blocking existing in a conventional LFR (Chaves, 2009; Chaves, 2010), while at the same time optimizing primary and secondary concentration to the limits allowed by first principles in optics. A preliminary evaluation of the optical and thermal performance has been performed (Canavarro, 2010, Horta 2011), and a configuration for a full scale CSP power plant proposed, with two secondary receivers (Fig.1), i.e a multiple receiver solution

Determinantes da estrutura de capital: efeito de variáveis micro e macroeconómicas no setor hoteleiro em Portugal - uma análise de dados em painel

A estrutura de capital investiga a forma como as empresas financiam os seus investimentos e a identificação dos determinantes que afetam a estrutura de capital é crucial no entendimento das decisões de investimento e de financiamento das empresas. A estrutura de capital ganhou maior relevância após o trabalho de Modigliani e Miller (1958). Esse trabalho serviu como referência para o desenvolvimento de várias teorias sobre a estrutura de capital, nomeadamente agrupadas em teoria do trade-off e teoria da pecking order. Este estudo pretende analisar os determinantes de natureza micro e macroeconómica da estrutura de capital, de uma amostra de 1213 PME do setor hoteleiro em Portugal, obtida através da base de dados Amadeus, para o período de 2014-2018, utilizando dados em painel. A variável dependente estudada foi o endividamento total. Como variáveis independentes foram consideradas variáveis microeconómicas e variáveis macroeconómicas. As de natureza microeconómica foram a rendibilidade, a tangibilidade do ativo, a dimensão, a poupança fiscal não associada à dívida, o crescimento e a reputação. Por sua vez, as de natureza macroeconómica foram o crescimento do PIB e a taxa de inflação. Os resultados demonstram que as variáveis rendibilidade, poupança fiscal não associada à dívida, reputação e inflação apresentam uma relação negativa com o endividamento. As variáveis tangibilidade do ativo, dimensão e crescimento do PIB apresentam uma relação positiva com o endividamento. A variável crescimento não é estatisticamente significativa, pelo que não tem poder explicativo no que tange ao endividamento das PME hoteleiras em Portugal. As variáveis de natureza macroeconómica apresentaram maior poder explicativo em relação ao endividamento total do que as variáveis microeconómicas. Os resultados obtidos neste estudo conferem aderência à teoria do trade-off e à teoria da pecking order como teorias explicativas da estrutura de capital das PME hoteleiras em Portugal.The capital structure investigates the way how companies finance their investments and the determinants identification that affect the capital structure is crucial in understanding companies investment and financing decisions. The capital structure obtained more relevance after the work of Modigliani and Miller (1958). Their work served as a reference for the development of several theories on the capital structure, namely grouped in the trade-off theory and the pecking order theory. This study aims to analyze the determinants of micro and macroeconomic nature of the capital structure, from a sample of 1213 SME in the hotel sector in Portugal, obtained through the Amadeus database, for the period 2014-2018, using panel data model. The dependent variable studied was total debt. As independent variables, microeconomic variables and macroeconomic variables were considered. The microeconomic variables were profitability, asset tangibility, size, non-debt tax shields, growth and reputation. In turn, the macroeconomic variables were GDP growth and inflation rate. The results show that the variables profitability, non-debt tax shields, reputation and inflation rate have a negative relationship with indebtedness. The variables asset tangibility, size and GDP growth have a positive relationship with indebtedness. The growth variable is not statistically significant, so it has no explanatory power regarding to the indebtedness of hotel SME in Portugal. The macroeconomic variables showed greater explanatory power in relation to indebtedness than microeconomic variables. The results obtained in this study provide adherence to the trade-off theory and the pecking order theory as explanatory theories of the capital structure of hotel SME in Portugal

Intravenous versus subcutaneous Trastuzumab in the treatment of breast cancer

Poster presented at the 44th ESCP Symposium on Clinical Pharmacy. Lisbon, 28-30 October 201

Cross-cultural validation and psychometric evaluation of the Self-Medication Assessment Tool (SMAT) for assessing and optimizing medication therapy management of older people

Background, rationale and objectives: The assessment of medication management ability in the elderly can be performed using specific tools, such as the Self-Medication Assessment Tool, which considers real and simulated regimens. The objective of this study was to perform the linguistic and cultural adaptation of the Self-Medication Assessment Tool to European Portuguese and determine its psychometric properties. Methods: The adaptation commenced with the translation/back translation cycle completed by 4 independent bilingual experts. The cultural component was accomplished through an external expert meeting and a longitudinal screening of concepts and construct. The pilot study was carried out in a sample of 150 Portuguese community-dwelling elders. Descriptive data, correlations, internal reliability, response consistency and exploratory factor analysis was conducted using SPSS Statistics (v22). Results: The pilot study was carried out in a sample of 150 community-dwelling elders: 112 (74.7%) participants were women; mean age was 74.73 ± 6.43 years. The Self-Medication Assessment Tool (Portuguese version) standard regimen (simulated medication regimen) mean scores were 20.92 ± 6.83 in functional ability and 38.75 ± 5.92 in cognitive ability; the real regimen (medication taken by the elderly) mean scores were 83.74 ± 15.86 in medication recall, 96.96 ± 11.39 in adherence self-report and 4.82 ± 10.1 in intentional non-adherence. Cronbach's α were 0.87 (functional ability), 0.84 (cognitive ability), 0.57 (medication recall), 0.94 (adherence self-report) and 0.79 (intentional non-adherence). The response consistency between test and re-test was verified. Conclusions: We have developed the European Portuguese version of the Self-Medication Assessment Tool with acceptable psychometric properties which can now be employed in the study of the elderly in clinical and research contexts

Leite de Vasconcellos (1858-1941) e a ciência etnográfica em Portugal

info:eu-repo/semantics/publishedVersio

Open markov type population models: From discrete to continuous time

Funding Information: Funding: For the second author, this work was done under partial financial support of RFBR (Grant n. 19-01-00451). For the first and third author this work was partially supported through the project of the Centro de Matemática e Aplicações, UID/MAT/00297/2020 financed by the Fundação para a Ciência e a Tecnologia (Portuguese Foundation for Science and Technology). The APC was funded by the insurance company Fidelidade.We address the problem of finding a natural continuous time Markov type process—in open populations—that best captures the information provided by an open Markov chain in discrete time which is usually the sole possible observation from data. Given the open discrete time Markov chain, we single out two main approaches: In the first one, we consider a calibration procedure of a continuous time Markov process using a transition matrix of a discrete time Markov chain and we show that, when the discrete time transition matrix is embeddable in a continuous time one, the calibration problem has optimal solutions. In the second approach, we consider semi-Markov processes—and open Markov schemes—and we propose a direct extension from the discrete time theory to the continuous time one by using a known structure representation result for semi-Markov processes that decomposes the process as a sum of terms given by the products of the random variables of a discrete time Markov chain by time functions built from an adequate increasing sequence of stopping times.publishersversionpublishe