OTIMIZAÇÃO DE PORTFÓLIOS: ANÁLISE DE EFICIÊNCIA

This article aims to analyze the behavior of a portfolio of assets selected by Data Envelopment Analysis (DEA), optimized by the Sharpe approach, and compare it to portfolios of assets obtained only by DEA or the Sharpe approach. To do that, we used the DEA model to assess the efficiency of shares of the São Paulo Stock Exchange (Bovespa), employing return, variance and other indicators such as input and output variables. Also, we used the Sharpe approach to optimize the portfolio composition. In the comparison of portfolios, we noted that the resulting combination of both models performed better than the portfolios optimized by only one of the models

Rehabilitation and Product Design: Towards the Inclusion of People with Disabilities Through Interdisciplinary Collaboration

In low-GDP countries, such as Brazil, many older people and people with disabilities rely on the public health system for access to assistive devices, which are important to support them to live healthy and dignified lives. However, many problems limit their access to specialized prescriptions and appropriate devices that satisfy their needs and expectations. This paper explores the challenges, contributions and results from an interdisciplinary collaboration between two different yet related areas of knowledge – Product Design and Rehabilitation – in education, research and innovation in assistive technologies. The combination of product design education and rehabilitation services has mutual benefits from the perspective of research and innovation, thus contributing for the community. Here, we report on the process and benefits resulting from four years of interdisciplinary collaboration on assistive products for the aging population and people with disabilities

Evaluation of Two PET Bottles Caps: An Exploratory Study

AbstractPackaging design is a key factor on the use of the products. For packagings that require the application of biomechanical forces, some features may favor or hinder the user's ability to open them. In soft drink PET packaging, the cap features play an important role in the application of forces and perception of the activity. The aim of this study is to evaluate two models of PET bottle caps widely used in Brazil. The study variables are the torque force exertion and thermal images of the hands of the subjects before and after the attempts of opening. This study has an exploratory and experimental character and included 16 subjects of both genders. The materials include one single PET packaging model properly adapted for the purpose of the study; two cap models with different characteristics; a torque transducer; and a digital thermograph. Data was analyzed using descriptive statistics and tests for mean comparisons. The results point out that the cap design may have influenced the opening forces applied, but not the temperatures measured at the evaluated points on the subject's hands

Aplicação preliminar do método QRAM para avaliação de riscos para segurança ocupacional na construção civil Preliminary application of QRAM method for safety risk assessment in civil construction

A segurança ocupacional é imprescindível na indústria da construção civil e a análise e avaliação de riscos para a segurança ocupacional (AARSO) é o primeiro e fundamental passo para alcançá-la, baseado na definição e implementação de programas de prevenção. A AARSO é um processo complexo, que implica a consideração e análise de muitos parâmetros quantitativos e/ou qualitativos que são difíceis de quantificar. As metodologias AARSO utilizadas na indústria da construção civil são baseadas em informação sujeita a incerteza (sendo tratada por técnicas probabilísticas e/ou estatísticas), difusa, imprecisa e/ou incompleta. Isso implica algumas limitações, como, por exemplo, obrigar os analistas a estimar parâmetros ou efetuar comparações com outros canteiros de obras (o que afasta do sistema real em estudo). O objetivo inicial deste estudo foi efetuar a pré-validação de um método AARSO, o QRAM, em duas cidades brasileiras, de médio e grande porte.<br>Risk Assessment for Health and Safety (RAH&S) of workers is a complex task that involves the consideration of many parameters that are, quite often, difficult to quantify. RAH&S in the construction industry is filled with inadequate data and/or imprecise and incomplete information, particularly in the design stage - to which traditional quantitative approaches do not have adequate answers. This study outlines the basic aspects for a Qualitative Risk Assessment Model (QRAM) based on elicited data, using fuzzy logic approach. The model was pre-validated in two Brazilian municipalities: Bauru, in the State of Sao Paulo, and Curitiba, in the State of Parana