Percorrer por autor "Pinto, Marco"
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- Gestão do ciclo de vida de um sistema de armas da FAP – Definição de um modelo de gestãoPublication . Pinto, MarcoA complexidade crescente da gestão de sistemas de armas advém do contínuo avanço tecnológico e do atual contexto de crise económica. Importa investigar como se pode otimizar a gestão e exploração dos sistemas de armas, recurso basilar para a Força Aérea. Este trabalho pretende assim definir um modelo de gestão assente numa visão holística da gestão dos SA ao longo do seu ciclo de vida e obter pistas sobre as vantagens e desvantagens deste modelo. Através de um percurso metodológico assente na estratégia quantitativa e com recurso a inquéritos, através dos resultados obtidos foi possível definir um ciclo de vida aplicável aos SA, identificar a presença de práticas de Engenharia do Sistema na Força Aérea e estabelecer um possível modelo de gestão do ciclo de vida. A adoção do modelo de gestão definido auxiliará a colmatar as dificuldades encontradas nos recursos humanos, materiais e financeiros contribuindo assim para a otimização da Gestão dos SA ao longo do seu ciclo de vida. Abstract: The increasing complexity in Weapons Systems Management is based upon continuous technology improvement and current economic crisis. The optimization of management and usage of weapons system, critical resource to Portuguese Air Force, it’s a relevant subject to investigate. This aim of this investigation is to define a management model to provide a holistic view of Weapons System management along their life cycle and gather clues about advantages and disadvantages of this model. The methodical path relies upon a quantitative strategy with the use of inquiries, according with the results obtained was possible to define the life cycle applicable to weapons systems, identify practices from a Systems Engineering presence at the Portuguese Air Force and establish a management model based on the life cycle. The implementation of life cycle management model will help to decrease the difficulties found on human, material and finance resources, it will also contribute to the optimization of weapons systems management along their life cycle.
- Intra and inter-rater repeatability of brachial artery ultrasound estimates of flow-mediated slowing and flow-mediated dilationPublication . Marôco, João Luís; Silvestre, Tiago; Arrais, Inês; Pinto, Marco; Santa-Clara, Helena; Fernhall, Bo; Melo, XavierFlow-mediated slowing (FMS) is a non-invasive measure of endothelial function measured through reactive hyperemia-induced changes in pulse wave velocity (PWV). FMS is suggested to mitigate known pitfalls of flow-mediated dilation (FMD) including suboptimal repeatability and high-operator dependency. However, the few single-rater studies that examined FMS repeatability have shown controversial results and used only regional measurements of PWV, which might not reflect local brachial artery stiffness responses to reactive hyperemia. We assessed the inter- and intra-rater repeatability of ultrasound-based changes in local PWV (FMS) and diameter (FMD). Twenty-four healthy male participants aged 23–75 yr, were examined on two separate days. Reactive hyperemia-induced changes in PWV were calculated using a tailored R-script. The inter- and intra-rater repeatability were tested with the intraclass correlation coefficient (ICC), coefficient of variation (CV), and the Bland-Altman plot estimates. The inter-rater repeatability of FMS (bias: -0.08%; ICC: 0.85; 95% CI: 0.65 to 0.93; CV: 11%) and FMD (bias: -0.02%; ICC: 0.98; 95% CI: 0.97 to 0.99; CV: 7%) showed overall good repeatability over different days. The intra-rater repeatability of FMD (1st rater: bias: 0.27%; ICC: 0.90; 95% CI: 0.78 to 0.96; CV: 14%; 2nd rater: bias: 0.60%; ICC: 0.85; 95% CI: 0.64 to 0.94; CV: 18%) was better than FMS (1st rater: bias: -1.03%; ICC: 0.76; 95% CI: 0.44 to 0.91; CV: 21%; 2nd rater: bias:-0.49%; ICC: 0.70; 95% CI: 0.34 to 0.80; CV: 23%) but not different between raters. Ultrasound-based local measurements of PWV deceleration reactive hyperemia were repeatable among the raters.
- Muography in the University and in the MuseumPublication . Afonso, Luis; Alexandre, Isabel; Andringa, Sofia; Assis, Pedro; Blanco, Alberto; Bezzeghoud, Mourad; Borges, Jose; Caldeira, Bento; Cazon, Lorenzo; Costa, Joao; Dobrilla, Paolo; Duarte, Magda; Lopes, Luıs; Matos, Joao; Oliveira, Rui; Pais, Vanessa; Pimenta, Mario; Pinto, Marco; Saraiva, Joao; Sarmento, Raul; Francisco Silva, Jorge; Teixeira, Pedro; Tome, Bernardo
- Post-acute exercise cardiovagal modulation in older male adults with and without type 2 diabetesPublication . Marôco, João Luís; Arrais, Inês; Silvestre, Tiago; Pinto, Marco; Laranjo, Sérgio; Magalhães, João; Santa-Clara, Helena; Fernhall, Bo; Melo, XavierPurpose: We examined heart rate variability (HRV) and baroreflex sensitivity (BRS) disease- and age-related response at 10-and 60-min after an acute high-intensity interval (HIIE) and moderate continuous exercise (MICE) in older adults with and without type 2 diabetes mellitus (T2DM) and healthy young adults. Methods: Twelve older male adults with (57–84 years) and without T2DM (57–76 years) and 12 healthy young male adults (20–40 years) completed an isocaloric acute bout of HIIE, MICE, and a non-exercise condition in a randomized order. Time and Wavelets-derived frequency domain indices of HRV and BRS were obtained in a supine position and offline over 2-min time-bins using Matlab. Results: HIIE but not MICE reduced natural logarithm root mean square of successive differences (Ln-RMSSD) (d = − 0.85; 95% CI − 1.15 to − 0.55 ms, p < 0.001), Ln-high-frequency power (d = − 1.60; 95% CI − 2.24 to − 0.97 ms2; p < 0.001), and BRS (d = − 6.32; 95% CI − 9.35 to − 3.29 ms/mmHg, p < 0.001) in adults without T2DM (averaged over young and older adults without T2DM), returning to baseline 60 min into recovery. These indices remained unchanged in older adults with T2DM after HIIE and MICE. Older adults with T2DM had lower resting Ln-RMSSD and BRS than aged-matched controls (Ln-RMSSD, d = − 0.71, 95% CI − 1.16 to − 0.262 ms, p = 0.001; BRS d = − 3.83 ms/mmHg), 95% CI − 6.90 to − 0.76, p = 0.01). Conclusions: Cardiovagal modulation following acute aerobic exercise is intensity-dependent only in adults without T2DM, and appears age-independent. These findings provide evidence of cardiac autonomic impairments in older adults with T2DM at rest and following aerobic exercise.
- Teoria relativista do ciberterrorismoPublication . Pinto, Marco; Rodrigues, FernandoRESUMO Esta dissertação procura conseguir minimizar ataques ciberterroristas que usam meios electrónicos, acessíveis a todos, mensurando o graude severidade e transformando dados em Informação. Aborda a globalização, possibilitando lesar interesses estrangeiros em qualquer parte do mundo usando meios electrónicos. Ao cessar a guerra-fria surgiram novas ameaças sendo necessário detectá-las e impedi-las, estimar a máxima verosimilhança, definir Informação e os níveis, mensurar a quantidade de Informação e certeza associada aos eventos, as dinâmicas humanas e sociais e que os sistemas de crenças são importantes. Define Terrorismo e Ciberterrorismo e as razões atrás dos actos criminosos, as dimensões em que os grupos se encaixam, as diferenças entre suporte e ataques, osgraus de ameaça e exemplos de ataques. Aborda também as principais ferramentas dos criminosos. Explica a relação existente entre as Botnets e o Ciberterrorismo, sendo computadores comprometidos, vendidos ou alugados para ataques em grande escala. Explica como se propagam, operam, formas de detectá-las e enfrentá-las. Conclui que tudo é relativo dependendo de cada indivíduo e cada computador, tendo-se de trabalhar os sistemas de crenças para fazer face às ameaças e desafios, pois o ataque ou a defesa vence dependendo da complicação ou simplicidade dos dados que afectam a quantidade de Informação.
- Vascular function after acute aerobic exercise in adults with and without type 2 diabetes mellitusPublication . Marôco, João Luís; Arrais, Inês; Silvestre, Tiago; Pinto, Marco; Laranjo, Sérgio; Magalhães, João; Santa-Clara, Helena; Fernhall, Bo; Melo, XavierIt is unknown whether type 2 diabetes mellitus (T2DM) influences the vascular function response to aerobic exercise. We examined brachial artery flow-mediated dilation (FMD) and flow-mediated slowing (FMS) of pulse wave velocity (PWV), 10-and 60-min after a high-intensity interval exercise (HIIE) and moderate-intensity continuous exercise (MICE) in adults with and without T2DM. Twelve older male adults with T2DM (57–84 years), and twenty-four healthy young and older adults (12 per group, aged 20–40 years and 57–76 years, respectively), completed an acute bout of HIIE, MICE, and a non-exercise condition. FMD was evaluated by the same researcher following standardized guidelines. FMS was calculated from the manufacturer’s PWV beta formulas. Central arterial stiffness was estimated via carotid-femoral PWV (cfPWV). %FMD was reduced (d= − 5.94%, 95% CI: − 10.50 to − 1.38%, p = 0.002), whereas %FMS increased (d = 4.55%, 95% CI: 0.62 to 8.48%, p = 0.01), 10-min after HIIE only in adults with T2DM, normalizing 60-min into recovery. Conversely, %FMD was increased (d = 5.33%, 95% CI: 0.76 to 9.89%, p = 0.009) 10-min after MICE only in adults with T2DM. cfPWV remained unchanged following HIIE and MICE in all groups. We report disease-associated vascular function responses to aerobic exercise suggesting both HIIE and MICE uncover transient vascular alterations in older adults with T2DM.