Optimization studies through simulation of a methanol/water/glycerol distillation column

This paper presents an optimization study of a distillation column for methanol and aqueous glycerol separation in a biodiesel production plant. Considering the available physical data of the column configuration, a steady state model was built for the column using Aspen-HYSYS as process simulator. Several sensitivity analysis were performed in order to better understand the relation between the variables of the distillation process. With the information obtained by the simulator, it is possible to define the best range for some operational variables that maintain composition of the desired product under specifications and choose operational conditions to minimize energy consumptions.

Evaluation of the improvements on pharmacy technicians' work practices after implementation of operational procedures

Several antineoplasic drugs have been demonstrated to be carcinogenic or to have mutagenic and teratogenic effects. The greatest protection is achieved with the implementation of administrative and engineering controls and safety procedures. Objective: to evaluate the improvements on pharmacy technicians' work practices, after the implementation of operational procedures related to individual protection, biologic safety cabinet disinfection and cytotoxic drug preparation. Method: case-study in a hospital pharmacy undergoing a certification process. Six pharmacy technicians were observed during their daily activities. Characterization of the work practices was made using a checklist based on ISOPP and PIC guidelines. The variables studied concerning cleaning/disinfection procedures, personal protective equipment and procedures for preparing cytotoxic drugs. The same work practices were evaluated after four months of operational procedures implementation. Concordance between work practices and guidelines was considered to be a quality indicator (guidelines concordance practices number/total number of practices x 100). Results: improvements were observed after operational procedures implementation. An improvement of 6,25% in personal protective equipment practice was achieved by changing second pair of gloves every thirty minutes. The major progress, 10%, was obtained in disinfection procedure, where 80% of tasks are now realized according to guidelines.By now, we hot an improvement of only 1% at drug preparation procedure by placing one cytotoxic drug at a time inside the biological safety cabinet. Then, 85% of practices are according to guidelines. Conclusion: before operational procedures implementation 80,3% of practices were according to the guidelines, while now is 84,4%. This indicates that is necessary to review the procedures frequently in the benefit to reduce the risks associated with handling cytotoxic drugs and maintenance of drug specifications.

Validation of a measurement scale for the relationship between the orientation to corporate social responsibility and other business strategic variables

The importance of Social Responsibility (SR) is higher if this business variable is related with other ones of strategic nature in business activity (competitive success that the company achieved, performance that the firms develop and innovations that they carries out). The hypothesis is that organizations that focus on SR are those who get higher outputs and innovate more, achieving greater competitive success. A scale for measuring the orientation to SR has defined in order to determine the degree of relationship between above elements. This instrument is original because previous scales do not exist in the literature which could measure, on the one hand, the three classics sub-constructs theoretically accepted that SR is made up and, on the other hand, the relationship between SR and the other variables. As a result of causal relationships analysis we conclude with a scale of 21 indicators, validated scale with a sample of firms belonging to the Autonomous Community of Extremadura and it is the first empirical validation of these dimensions we know so far, in this context.

A qualidade das salas de berçários nos concelhos de Setubal e de Palmela

Tendo por principal objetivo contribuir para o estudo da qualidade das creches dos Concelhos de Setúbal e de Palmela, com este trabalho pretende-se (1) avaliar e descrever a qualidade de 30 salas de berçário através da aplicação da Escala de Avaliação do Ambiente de Creche – Edição Revista (Infant/Toddler Environment Rating Scale – Revised Edition [ITERS-R], Harms, Cryer, & Clifford, 2006), (2) avaliar e descrever as práticas de socialização dos prestadores de cuidados responsáveis pelas 30 salas de berçário através da aplicação da Escala de Interação do Prestador de Cuidados (Caregiver Interaction Scale [CIS], Arnett, 1989), (3) estudar a associação entre as práticas de socialização dos profissionais e a qualidade das salas de berçário, (4) estudar associações entre a qualidade das salas de berçário e as práticas de socialização dos profissionais e algumas variáveis de estrutura (rácio adulto/criança, tamanho do grupo, educação, formação e experiência dos prestadores de cuidados). Tendo em conta que os estudos efetuados em Portugal revelam qualidade inadequada e mínima nas salas de creche, os resultados obtidos no presente estudo sugerem que as salas observadas possuem qualidade entre o mínimo e o bom. Embora o presente estudo apresente resultados superiores, verificou-se que os itens que apresentam maiores fragilidades (áreas deficitárias), assim como os itens que expressam maior qualidade (áreas fortes) parecem convergir com os resultados das investigações já efetuadas, com efeito os itens relacionados com as subescalas Atividades e Rotinas de cuidados pessoais são os que apresentam os resultados mais preocupantes. A subescala Interação foi a que apresentou resultados superiores e as práticas de socialização dos prestadores de cuidados revelaram ser excelentes. Verificou-se, igualmente, que as salas orientadas por educadores de infância, assim como, as salas em que o principal prestador de cuidados era educador de infância revelaram qualidade superior do que salas orientadas por assistentes operacionais (auxiliares de ação educativa). Este efeito chama a atenção para a importância da formação e qualificação dos profissionais de educação, assim como, para a necessidade de se alterarem as políticas educativas, nomeadamente no que diz respeito à obrigatoriedade de existirem educadores de infância nas salas de berçário. - ABSTRACT With the main objective of contributing to the study of quality of infant/toddler center-based child care in the Counties of Setúbal and Palmela, this work aims to (1) assess and describe the quality of 30 infant classrooms by applying the Infant/Toddler Environment Rating Scale-Revised Edition ([ITERS-R], Harms, Cryer, & Clifford, 2006), (2) assess and describe the socialization practices of caregivers responsible for 30 infant classrooms by applying the Caregiver Interaction Scale ([CIS], Arnett, 1989), (3) study the association between the socialization practices of professionals and the quality of infant classrooms, (4) to study associations between the quality of infant classrooms and the socialization practices of professionals and some structure variables (ratio adult/child group size, education, training, and experience of carers). Considering that the studies carried out in Portugal reveal minimum or inadequate quality in infant/toddler center-based child care, the results of this study suggest that, in accordance with ITERS-R, the quality of the infant classrooms observed varies between minimum and good. Although the present study reports higher quality scores, it was found that items which present the biggest weaknesses (deficit areas) as well as the items which express higher quality (strengths) appear to converge with the results of the investigations already carried out, since the items related with subscales Activities and Personal Care Routines are those with the most worrisome results. The Interaction subscale from ITERS-R proved to be the one with higher scores, and socialization practices of caregivers proved to be excellent. It was also found that the rooms oriented by early childhood teachers, as well as the rooms in which the primary care provider was also guided by childhood teachers showed higher quality than when guided by operational assistants (educational activities assistants). This effect draws attention to the importance of the education professionals training and qualification, as well as the need for altering the educational policies, in particular as regards the obligation to ensure the existence of early childhood teachers in infant classrooms.

Análise da divulgação ambiental das empresas cotadas no PSI20 e no IBEX35 nos anos de 2010 e 2011

Mestrado em Contabilidade

Avaliação e optimização operacional: estudo do terminal de contentores de Alcântara

Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Mecânica - Ramo Manutenção e Produção

Planeamento de curto prazo de sistemas de energia solar usando técnicas de otimização robusta

Dissertação para obtenção do grau de Mestre em Engenharia Electrotécnica

Gestão em farmácia - Implementação de um sistema de distribuição de medicamentos Pyxis®: um estudo de caso de dois hospitais centrais

Mestrado em Intervenção Sócio-Organizacional na Saúde - Área de especialização: Políticas de Administração e Gestão em Saúde

Enhancing the selection of a model-based clustering with external categorical variables

In cluster analysis, it can be useful to interpret the partition built from the data in the light of external categorical variables which are not directly involved to cluster the data. An approach is proposed in the model-based clustering context to select a number of clusters which both fits the data well and takes advantage of the potential illustrative ability of the external variables. This approach makes use of the integrated joint likelihood of the data and the partitions at hand, namely the model-based partition and the partitions associated to the external variables. It is noteworthy that each mixture model is fitted by the maximum likelihood methodology to the data, excluding the external variables which are used to select a relevant mixture model only. Numerical experiments illustrate the promising behaviour of the derived criterion. © 2014 Springer-Verlag Berlin Heidelberg.

Otimização estocástica para a exploração de centrais de concentração solar considerando incerteza e risco

Dissertação para obtenção do grau de Mestre em Engenharia Eletrotécnica

Enhancing the selection of a model-based clustering with external categorical variables

In cluster analysis, it can be useful to interpret the partition built from the data in the light of external categorical variables which are not directly involved to cluster the data. An approach is proposed in the model-based clustering context to select a number of clusters which both fits the data well and takes advantage of the potential illustrative ability of the external variables. This approach makes use of the integrated joint likelihood of the data and the partitions at hand, namely the model-based partition and the partitions associated to the external variables. It is noteworthy that each mixture model is fitted by the maximum likelihood methodology to the data, excluding the external variables which are used to select a relevant mixture model only. Numerical experiments illustrate the promising behaviour of the derived criterion.