Browsing by Issue Date, starting with "2018-10-23"
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- Multi-branched tubular components using water-assisted injection mouldingPublication . Nanjunda, Sachin; Matias, João Manuel; Rúben, Rui Miguel BarreirosThe development in automobile or consumer product industries is rising drastically. The complexity of the parts and limitations in design and manufacturing suppress the requirements of potential customers in production. The automotive or consumer products parts has become more and more complex with dimensional variations, curves, multi branches and connections especially using metals, results in higher production cost. Production of hollow plastic parts with complex geometries and several branches is a challenge for moulding industries. Water-assisted injection moulding (WAIM) technique provides a solution for these challenges when compared to the traditional injection moulding techniques. The primary objective of this work is to define new methods to produce hollow polymeric parts with several branches and complex geometries using computer simulations. We will study the WAIM process with different parameters and water injection approaches (i.e., using a single water injector and multiple water injector) and validate with experimental work. As this is a complex challenge, we have used computer simulations using Moldex3D software for the WAIM technique to optimise the operational parameters including the injection points for both plastic and water and additional gates to serve as a starting point for the experimental work and verification of the computer simulations. We use a standard water-assisted injection mould and machine as a test-bed to study the WAIM process to produce a branched tube with a diameter of 20 mm and a length of 315 mm, using both single injector and multi-injector systems. We will present the variation of the injection parameters and their influence on the final product quality. We have identified one mode of operation which leads to a substantial saving in the mass of plastic used to produce the parts. This innovative work will influence on the production of multi-branched and complex geometry hollow parts, which will effectively reduce the overall production time, raw material savings and eliminates the post-processing work on moulded polymeric parts.
- Tracking human routines towards adaptive monitoring: the MOVIDA.domus platformPublication . Gordalina, Gonçalo; Figueiredo, João; Martinho, Ricardo; Rijo, Rui; Correia, Pedro; Assunção, Pedro A. Amado; Seco, Alexandra; Pires, Gabriel; Oliveira, Luís; Fonseca-Pinto, RuiAccording to estimates by the World Health Organization, the average life expectancy will continue to rise. This indicator, being a measure of success in terms of healthcare, is not synonymous with quality of life and will increase healthcare costs. Associated with this problem are also the changes in terms of the organization of society, which has not been able to solve these constraints of functional limitations, dementia, social isolation, and loneliness. This paper presents the concept of adaptive surveillance based on mobile technology and artificial intelligence, presented in the context of a global physical activity monitoring program (MOVIDA), in his domus dimension designed to the elderly people with some functional limitation or dementia. The proposed solution for an adaptive surveillance is thus to conduct direct supervision programs, to enroll persons who live alone or in nursing homes who need supervision without limiting their individual autonomy. The preliminary results show that it is possible to use the data obtained from a mobile smartphone to identify routines and use this information to identify daily patterns. Changes to these routine patterns can be used to generate alarms for caregivers.
- The influence of responsible leadershipon expatriates’ performance: the mediating role of affective well-being atworkand the moderating role of cross-cultural adjustmentPublication . Branco, Melissa Marques; Marques, Tânia de Matos Gomes; Crespo, Cátia ClaudemiraThe concept of responsible leadership is emerging in the literature to address the globalization demands. Responsible leadership is distinguished from other leadership styles by the closest relationship of the leader with all stakeholders. However, few studies in the literature had empirically examined the influence of responsible leadership on employee outcomes, considering a cross-border environment. The aim of this study is to examine the effect of responsible leadership on expatriates’ performance and affective well-being at work. At the same time, it is considered that cross-cultural adjustment should be taken into account when approaching expatriate employees. Using the Social Identity Theory, this study outlines the relation of responsible leadership on expatriates’ outcomes at work. An online questionnaire was conducted to collect data from a sample of expatriate employees, which are currently in the process of expatriation. A total of 111 valid answers were obtained and used in this study. Structural equation modeling was used to analyse the collected data. The results show that responsible leadership has a positive impact on the affective well-being at work and an indirect impact on expatriates’ performance through the mediation role of affective well-being at work. Moreover, affective well-being at work directly contributes to expatriates’ performance. The cross-cultural adjustment did not play a moderator role when assessing the direct relation between responsible leadership and expatriates’ performance. It is suggested that responsible leadership has a positive contribution when addressing employees’ outcomes in a global context.
- Perceção dos consumidores relativamente à água da rede pública do concelho de LeiriaPublication . Leão, Ricardo Miguel Oliveira; Mendes, Susana Luísa da Custódia MachadoA água é um dos recursos mais importantes para a subsistência da vida na terra, apesar de ser também um dos principais veículos de transmissão de doenças, o que tem impulsionado a um esforço acrescido por parte das entidades responsáveis, a que esta esteja disponível, com a melhor qualidade possível, para o consumo de toda a população humana na terra. A presente dissertação surgiu com a perceção de que a segurança da água da rede pública (ARP) era cética entre os consumidores, algo que contradiz o nível de segurança emitido pela Entidade Reguladora dos Serviços de Águas e Resíduos (ERSAR). Deste modo, realizou-se um estudo que teve como objetivos: (1) compreender o nível de confiança dos consumidores relativamente à água da rede pública; (2) perceber se os consumidores estão informados sobre a água que abastece as suas habitações; (3) averiguar se os consumidores fazem manutenção/limpeza aos pontos de saída de água das suas habitações. A investigação iniciou-se com a pesquisa e revisão bibliográfica para um adequado conhecimento da área em estudo. Numa segunda parte delinearam-se hipóteses de investigação e realizaram-se questionários junto da população do concelho de Leiria, com intenção de recolher informação para dar resposta aos objetivos traçados. Através dos dados obtidos, verificou-se que a confiança dos consumidores relativamente à ARP deriva das suas propriedades organoléticas, sendo que apenas 39,4% dos consumidores confiam plenamente na água proveniente da rede pública Relativamente ao conhecimento dos consumidores é evidente que grande parte dos consumidores não está informada sobre o nível de segurança nem onde é captada a ARP, independentemente da idade, género, habilitações literárias ou número do agregado familiar. Verifica-se também que 70,8% dos inquiridos fazem limpeza/manutenção dos filtros e destes 50,1% encontra sujidade nos mesmos. Estes dados podem ser também a razão pela qual os consumidores têm uma perspetiva negativa da ARP.
- Proposal for selection of mental health indicators in the management of health networks: from heuristic to process modelingPublication . Lima, Inacia Bezerra de; Yamada, Diego Bettiol; Yoshiura, Vinicius Tohoru; Lance, Rogério Cortecioni; Rodrigues, Lidia Maria Lourençön; Vinci, Andre Luiz Teixeira; Martinho, Ricardo; Pádua, Silvia Dallavalle de; Rijo, Rui Pedro Charters Lopes; Rijo, Rui, Rui Pedro Charters Lopes; Furegato, Antonia Regina Ferreira; Alves, DomingosIn 2011, Brazil instituted the Psychosocial Care Network (RAPS) for people suffering from mental disorders and needs arising from the use of alcohol and other drugs within the Unified Health System an electronic information system that supports the planning, regulation, control and evaluation of mental health actions. Several studies have been done to select a complete set of indicators for mental health in Brazil; however, these studies do not describe how these principles are transposed into indicators. In this work we will use Business Process Management Notation (BPMN) to analyze the process of patient care in a mental health unit and to search through this analysis to select and map those that apply to the specific RAPS institutions. We propose a method, using process modeling along the Thornicroft and Tansella matrix, to select the relevant indicators and their mapping along the network. The method was effective allowing the application of indicators to the concrete reality of a psychiatric hospital in Brazil.
- Towards a standardized protocol for conducting randomized clinical trial for softwarePublication . Rodrigues, Lídia Maria Lourençön; Lima, Inacia Bezerra de; Santos, Luiz Ricardo Albano dos; Bollela, Valdes Roberto; Cruz-Cunha, Maria Manuela; Rijo, Rui, Rui Pedro Charters Lopes; Alves, DomingosIn the last decade, evidence-based medical practice has been aided on a large scale by computerized decision support tools, aimed at reducing diagnostic and therapeutic uncertainty, complementing the actions of the health professional. With the technological evolution, it is already possible to consider these systems as part of the clinical intervention, both for the diagnostic stage and for the treatment of diseases. This article proposes the creation of a specific clinical trial protocol to evaluate the effects of the software as clinical intervention in different medical settings. The proposal is unprecedented and extremely relevant in the scientific literature and able to standardize from the development stage to the application of the software aiding in the treatment of diseases.