Mechanical Engineering - Research Publications
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ItemNo Preview AvailableComputational Fluid Dynamics of Stent-Mounted Neural Interfaces in an Idealized Cerebral Venous Sinus.(IEEE, 2023-07)Hemodynamic changes in stented blood vessels play a critical role in stent-associated complications. The majority of work on the hemodynamics of stented blood vessels has focused on coronary arteries but not cerebral venous sinuses. With the emergence of endovascular electrophysiology, there is a growing interest in stenting cerebral blood vessels. We investigated the hemodynamic impact of a stent-mounted neural interface inside the cerebral venous sinus. The stent was virtually implanted into an idealized superior sagittal sinus (SSS) model. Local venous blood flow was simulated. Results showed that blood flow was altered by the stent, generating recirculation and low wall shear stress (WSS) around the device. However, the effect of the electrodes on blood flow was not prominent due to their small size. This is an early exploration of the hemodynamics of a stent-mounted neural interface. Future work will shed light on the key factors that influence blood flow and stenting outcomes.Clinical Relevance-The study investigates blood flow through a stent-based electrode array inside the cerebral venous sinus. The hemodynamic impact of the stent can provide insight into neointimal growth and thrombus formation.
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ItemNo Preview AvailableFocused Contrastive Loss for Classification With Pre-Trained Language Models(Institute of Electrical and Electronics Engineers (IEEE), 2023-01-01)
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ItemNo Preview AvailableNear-Wall Flow Statistics in High-Reτ Drag-Reduced Turbulent Boundary Layers(SPRINGER, 2023-01-01)
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ItemReadiness of Brazilian Industrial Engineering postgraduate programs for Industry 4.0: A knowledge dimensions assessment(Wiley, 2023-05)This study examines how Industrial Engineering postgraduate programs intend to develop the competencies required for Industry 4.0 in their students. An exploratory and descriptive approach was adopted. Multiple sources of evidence were collected in four of Brazil's best‐ranked and most traditional Industrial Engineering postgraduate programs, involving experienced academics and directors of these programs. Four knowledge dimensions were used to frame our study: factual, conceptual, procedural, and metacognitive. Results indicate that Industrial Engineering postgraduate courses tend to emphasize technical competencies, such as problem and conflict‐solving, decision‐making, and analytical and research skills, rather than competencies related to interpersonal relationships, such as creativity, entrepreneurial thinking, leadership, adaptability, and flexibility. We also found that the development of Industry 4.0 competencies in the examined Industrial Engineering postgraduate programs mostly relies on activities related to procedural knowledge. Our study provides Industrial Engineering instructors and academics arguments to revisit their curricula and better prepare postgraduate students for the challenges imposed by Industry 4.0.
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ItemNo Preview AvailableEffect of Industry 4.0 on the relationship between socio-technical practices and workers' performance(EMERALD GROUP PUBLISHING LTD, 2023-01-17)Purpose This paper aims to examine the moderating effect of Industry 4.0 (I4.0) technologies on the relationship between socio-technical (ST) practices and workers' health, quality and productivity performance. Design/methodology/approach In this paper, 192 practitioners from different manufacturing firms adopting I4.0 technologies were surveyed, analyzed the collected data using multivariate techniques and discussed the results in light of ST theory. Findings Findings indicate that I4.0 moderates the relationship between ST practices and performance, to an extent and direction that varied according to the focus of the technologies and practices adopted. Originality/value The I4.0 movement has triggered changes in the work organization at unprecedented rates, impacting firms' social and technical aspects. This study bridges a gap in the literature concerning the integration of I4.0 technologies into manufacturing firms adopting ST practices, enabling the verification of the moderating effects on workers' performance. Although previous studies have investigated that relationship, the moderating effect of I4.0 on performance is still underexplored, characterizing an important contribution of this research.
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ItemNo Preview AvailableLean production, information and communication technologies and operational performance(ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2023-01-02)
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ItemNo Preview AvailableThe significance of octane numbers to hybrid electric vehicles with turbocharged direct injection engines(ELSEVIER SCI LTD, 2023-02-15)
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ItemFeasibility and performance analysis of hybrid ground source heat pump systems in fourteen cities(PERGAMON-ELSEVIER SCIENCE LTD, 2021-11-01)Ground source heat pump systems (GSHP) for residential building heating, cooling, and hot water are highly energy efficient but capital intensive when sized for peak demands. The use of supplemental sources of energy with GSHP systems enables improved life-cycle economics through the reduction in the size and cost of the GSHP components. This paper investigates the life-cycle economics of hybrid solar-assisted ground source heat pump systems (SAGSHP) using simulations validated from field data. The economics and optimal sizing of SAGSHP systems for heating dominant climates in four locations in Australia and ten locations elsewhere are evaluated in order to explore the suitability and relative merits of SAGSHP systems in a range of heating dominant climates. In locations having high or moderate levels of solar irradiation, high electricity prices, and high or moderate gas prices, SAGSHP systems are shown to have the lowest life cycle cost amongst alternatives, with predicted savings of up to 30%.