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Single and two-phase flows on chemical and biomedical engineering

Dias, Ricardo; Lima, R.; Martins, Antonio; Mata, Teresa
Fonte: Bentham Publicador: Bentham
Tipo: Livro
ENG
Relevância na Pesquisa
66.36%
Single or two-phase flows are ubiquitous in most natural process and engineering systems. Examples of systems or process include packed bed reactors, either single phase or multiphase, absorber and adsorber separation columns, filter beds, plate heat exchangers, flow of viscoelastic fluids in polymer systems, or the enhanced recovery of oil, among others. In each case the flow plays a central role in determining the system or process behaviour and performance. A better understanding of the underlying physical phenomena and the ability to describe is crucial to design, operate and control processes involving the flow of fluids, ensuring that they will be more efficient and cost effective. Growing areas such as microfluidics, nanomedicine and the modelling and simulation of complex flow in living systems such as the blood flow in microvascular networks rely upon a good description of the flow. One way of studying the blood flow behavior is in the context of blood flow in large arteries, and another is in small vessels. In the former case, blood may be treated as a homogenous fluid and Newtonian constitutive equations are generally accepted as a good approximation to express the rheological property of blood. In small vessels...

Rede de sensores para engenharia biomédica utilizando o protocolo IEEE1451.; Sensors network for biomedical engineering using IEEE1451 protocol.

Becari, Wesley
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 30/01/2012 PT
Relevância na Pesquisa
66.2%
A utilização de sensores e de atuadores cresceu vertiginosamente nos últimos anos. As aplicações centralizadas em sensoriamento e controle avançaram com a instrumentação industrial, passando pela incorporação desses elementos em redes distribuídas até culminar, na atualidade, em redes integradas que possuem inúmeras funções e aplicações, dentre elas: controle, monitoramento, rastreamento e segurança. Entretanto o crescimento do número de sensores e atuadores conectados através de barramentos e redes não ocorreu de forma única, proliferando uma diversidade de formas de padronização na comunicação entre esses e seus respectivos monitores ou controladores. Dessa pluralidade de protocolos emergiu a necessidade de criação de um padrão que permitisse interoperabilidade entre transdutores e redes de controle, bem como a introdução do conceito de sensores e atuadores inteligentes. Nesse contexto foi proposto o protocolo IEEE1451 (Standards for Smart Transducer Interface for Sensors and Actuators). Nessa perspectiva o trabalho em questão apresenta os resultados do desenvolvimento e a utilização desse padrão em duas aplicações de engenharia biomédica. Primeiramente em um sistema embarcado capaz de realizar aquisição e processamento de biopotenciais...

Aplicação da metodologia de gerenciamento preditivo para implantação de projetos de engenharia biomédica; Predictive project management for biomedical engineering implementations

Lemos, Luiz Alber
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Dissertação
POR
Relevância na Pesquisa
46.4%
Dissertação (mestrado)—Universidade de Brasília, Faculdade Gama, Programa de Pós-Graduação em Engenharia Biomédica, 2012.; O Gerenciamento de Projetos tem aberto oportunidades para desenvolvimento de novas metodologias a partir do seu padrão clássico de gestão. No caso da Engenharia Biomédica há especificidades, tanto pela riqueza científica aplicada nos seus projetos, quanto pelo refinamento dos requisitos que envolvem o desenvolvimento dos seus projetos e da sua implantação. A formação científica, tecnológica e profissional da Engenharia Biomédica tem levado a um grande desenvolvimento dos dispositivos biomédicos tanto em quantidade como em qualidade e mesmo diante dos controles mais rigorosos da área de saúde humana, a Engenharia Biomédica não pode prescindir do Gerenciamento de Projetos para alcançar o objetivo mais nobre de seus produtos, que é chegar ao usuário que deles necessita, no momento que necessita e onde quer que ele esteja. As referências para o Gerenciamento de Projetos na Engenharia Biomédica, assim como na saúde de maneira geral, têm se voltado para estudos de caso onde o foco está mais no que fazer, não tanto para como fazer e menos ainda em como organizar e controlar o que dever ser realizado...

Application of MRI and biomedical engineering in speech production study

Sandra Moreira Rua Ventura; Diamantino Rui da Silva Freitas; João Manuel Ribeiro da Silva Tavares
Fonte: Universidade do Porto Publicador: Universidade do Porto
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
46.24%
The speech production has always been a subject of interest both at morphologic and acoustic levels. This knowledge is useful for a better understanding of all the involved mechanisms, and for the construction of articulatory models. Magnetic resonance imaging (MRI) is a powerful technique that allows the study of the whole vocal tract, with good soft tissues contrast and resolution, and permits the calculation of area functions toward a better the understanding of this mechanism. Thus, our aim is to demonstrate the value and application of MRI in speech production study and its relationship with engineering, namely with biomedical engineering. After vocal tract contours extraction, data was processed for three-dimensional reconstruction culminating in models construction of some sounds of the European Portuguese. MRI provides useful morphologic data about the position and shape of the different speech articulators, and the biomedical engineering computational tools for its analysis.

The International Journal for Numerical Methods in Biomedical Engineering - Special Issue on Computational Methods for Biomedical Image Processing and Analysis

Fonte: Universidade do Porto Publicador: Universidade do Porto
Tipo: Livro
ENG
Relevância na Pesquisa
46.32%
The International Journal for Numerical Methods in Biomedical Engineering, ISSN: 2040-7939 (print) - 2040-7947 (online), John Wiley Sons, on Computational Vision and Medical Imaging, which includes 11 articles, Special Issue: COMPUTATIONAL METHODS FOR BIOMEDICAL IMAGE PROCESSING AND ANALYSIS, Volume 29, Issue 9, pp. 885-1013, September 2013.; The International Journal for Numerical Methods in Biomedical Engineering, ISSN: 2040-7939 (print) - 2040-7947 (online), John Wiley Sons, em Computational Vision and Medical Imaging, que incluí 11 artigos, Special Issue: COMPUTATIONAL METHODS FOR BIOMEDICAL IMAGE PROCESSING AND ANALYSIS, Volume 29, Issue 9, pp. 885-1013, September 2013

Electrospinning : processing technique for tissue engineering scaffolding

Martins, A.; Reis, R. L.; Neves, N. M.
Fonte: Maney Publicador: Maney
Tipo: Artigo de Revista Científica
Publicado em //2008 ENG
Relevância na Pesquisa
46.2%
Electrospinning has attracted tremendous interest in the research community as a simple and versatile technique to produce synthetic polymeric ultrafine fibres with diameters ranging from a few micrometres to tens of nanometres. Recently, some natural origin polymers have also been successfully electrospun. Owing to their very small diameter, polymeric nanofibres exhibit unusual properties such as high specific surface area, flexibility in surface functionalities and superior mechanical properties. In addition, electrospun non-woven meshes could physically mimic the extracellular matrix structure of native tissues. These remarkable properties render electrospun nanofibres useful for many applications, particularly those related to the field of biomedical engineering. The first part of this review is intended to provide a fundamental survey of the electrospinning process (apparatus, governing parameters) and of recent improvements of the technique, including associated structural modifications of polymeric nanofibre meshes. The prospective tissue engineering/biomedical applications of electrospun polymeric nanofibres are then reviewed, namely, wound dressings, medical prostheses, drug delivery systems, DNA release and tissue engineering scaffolds. The essential properties of scaffolds in terms of the structural features of electrospun nanofibre meshes are discussed. Finally...

Porous and Complex Flow Structures in Modern Technologies

Bejan, A.; Dincer, I; Lorente, S; Miguel, A. F.; Reis, A. H.
Fonte: Springer-Verlag Publicador: Springer-Verlag
Tipo: Livro
ENG
Relevância na Pesquisa
46.33%
Porous and Complex Flow Structures in Modern Technologies represents a new approach to the field, considering the fundamentals of porous media in terms of the key roles played by these materials in modern technology. Intended as a text for advanced undergraduates and as a reference for practicing engineers, the book uses the physics of flows in porous materials to tie together a wide variety of important issues from such fields as biomedical engineering, energy conversion, civil engineering, electronics, chemical engineering, and environmental engineering. Thus, for example, flows of water and oil through porous ground play a central role in energy exploration and recovery (oil wells, geothermal fluids), energy conversion (effluents from refineries and power plants), and environmental engineering (leachates from waste repositories). Similarly, the demands of miniaturization in electronics and in biomedical applications are driving research into the flow of heat and fluids through small-scale porous media (heat exchangers, filters, gas exchangers). Filters, catalytic converters, the drying of stored grains, and a myriad of other applications involve flows through porous media. By providing a unified theoretical framework that includes not only the traditional homogeneous and isotropic media but also models in which the assumptions of representative elemental volumes or global thermal equilibrium fail...

JNER: a forum to discuss how neuroscience and biomedical engineering are reshaping physical medicine & rehabilitation

Bonato, Paolo
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 13/10/2004 EN
Relevância na Pesquisa
46.36%
Advances in neuroscience and biomedical engineering deeply affect the clinical practice of physical medicine & rehabilitation. New research findings and engineering tools are continuously made available that have the potential of dramatically enhancing the ability of clinicians to design effective rehabilitation interventions. This quickly evolving research field is difficult to track because related literature appears in a wide range of scientific journals. There is a need for a scientific journal that offers to its readership a forum at the intersection of neuroscience, biomedical engineering, and physical medicine & rehabilitation. The Journal of NeuroEngineering and Rehabilitation (JNER) is intended to fill this gap and foster cross-fertilizations among these disciplines. By making readily available to clinicians selected studies with potential impact on physical medicine & rehabilitation, JNER is anticipated to foster the development of novel and more effective rehabilitation strategies. Conversely, by presenting clinical problems to a readership of neuroscientists and engineers, JNER is expected to generate innovative work in neuroscience and biomedical engineering with future applications to physical medicine & rehabilitation. JNER will leverage on Open Access as a means to guarantee that its content is readily available to scientists...

The development of biomedical engineering as experienced by one biomedical engineer

Newell, Jonathan C
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 12/12/2012 EN
Relevância na Pesquisa
46.26%
This personal essay described the development of the field of Biomedical Engineering from its early days, from the perspective of one who lived through that development. It describes the making of a major invention using data that had been rejected by other scientists, the re-discovery of an obscure fact of physiology and its use in developing a major medical instrument, the development of a new medical imaging modality, and the near-death rescue of a research project. The essay concludes with comments about the development and present status of impedance imaging, and recent changes in the evolution of biomedical engineering as a field.

JNER: A Forum to Discuss How Neuroscience and Biomedical Engineering are Reshaping Physical Medicine & Rehabilitation

Bonato, Paolo
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
46.36%
Advances in neuroscience and biomedical engineering deeply affect the clinical practice of physical medicine & rehabilitation. New research findings and engineering tools are continuously made available that have the potential of dramatically enhancing the ability of clinicians to design effective rehabilitation interventions. This quickly evolving research field is difficult to track because related literature appears in a wide range of scientific journals. There is a need for a scientific journal that offers to its readership a forum at the intersection of neuroscience, biomedical engineering, and physical medicine & rehabilitation. The Journal of NeuroEngineering and Rehabilitation (JNER) is intended to fill this gap and foster cross-fertilizations among these disciplines. By making readily available to clinicians selected studies with potential impact on physical medicine & rehabilitation, JNER is anticipated to foster the development of novel and more effective rehabilitation strategies. Conversely, by presenting clinical problems to a readership of neuroscientists and engineers, JNER is expected to generate innovative work in neuroscience and biomedical engineering with future applications to physical medicine & rehabilitation. JNER will leverage on Open Access as a means to guarantee that its content is readily available to scientists...

Photonic Crystal Nanobeam Cavities for Biomedical Sensing

Quan, Qimin
Fonte: Harvard University Publicador: Harvard University
Tipo: Thesis or Dissertation
EN_US
Relevância na Pesquisa
46.23%
Manipulation of light at the nanoscale has the promise to enable numerous technological advances in biomedical sensing, optical communications, nano-mechanics and quantum optics. As photons have vanishingly small interaction cross sections, their interactions have to be mitigated by matters (i.e. quantum emitters, molecules, electrons etc.). Waveguides and cavities are the fundamental building blocks of the optical circuits, which control or confine light to specific matters of interest. The first half of the thesis (Chapters 2 & 3) focuses on how to design various photonic nanostructures to manipulate light on nano- to micro- scale, especially to modify the light-matter interaction properties. Chapter 2 discusses how nano-slot waveguides and photonic crystal nanobeam waveguides are able to modify the emission of quantum emitters, in a different way that normal ridge waveguides are not able to. Chapter 3 focuses on a more complicated and powerful structure: the photonic crystal nanobeam cavity. The design, fabrication and characterization of the photonic crystal nanobeam cavities are described and demonstrated in detail, which lays out the foundation of the biomedical sensing applications in the second half of the thesis. The second half of the thesis (Chapters 4 & 5) focuses on the application of photonic crystal nanobeam cavities in the label-free sensing of biomedical substances. Chapter 4 demonstrates detection of solutions with different refractive index (aceton...

20.462J / 3.962J Molecular Principles of Biomaterials (BE.462J), Spring 2003; Molecular Principles of Biomaterials (BE.462J)

Irvine, Darrell J.
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
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EN-US
Relevância na Pesquisa
46.27%
Analysis and design at a molecular scale of materials used in contact with biological systems, including biotechnology and biomedical engineering. Topics include molecular interactions between bio- and synthetic molecules and surfaces; design, synthesis, and processing approaches for materials that control cell functions; and application of state-of-the-art materials science to problems in tissue engineering, drug delivery, biosensors, and cell-guiding surfaces.

BE.462J Molecular Principles of Biomaterials, Spring 2003; Molecular Principles of Biomaterials

Irvine, Darrell J.
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
EN-US
Relevância na Pesquisa
46.27%
Analysis and design at a molecular scale of materials used in contact with biological systems, including biotechnology and biomedical engineering. Topics include molecular interactions between bio- and synthetic molecules and surfaces; design, synthesis, and processing approaches for materials that control cell functions; and application of state-of-the-art materials science to problems in tissue engineering, drug delivery, biosensors, and cell-guiding surfaces.

16.423J Space Biomedical Engineering & Life Support, Fall 2002; Space Biomedical Engineering & Life Support

Newman, Dava J.
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
EN-US
Relevância na Pesquisa
46.2%
Fundamentals of human performance, physiology, and life support impacting engineering design and aerospace systems. Topics include: effects of gravity on the muscle, skeletal, cardiovascular, and neurovestibular systems; human/pilot modeling and human/machine design; flight experiment design; and life support engineering for extravehicular activity (EVA). Case studies of current research are presented. Assignments include a design project, quantitative homework sets, and quizzes emphasizing engineering and systems aspects.

Rochester Center for Biomedical Ultrasound 2006 Annual Report

Christiansen, Betsy
Fonte: University of Rochester Publicador: University of Rochester
Tipo: Relatório
ENG
Relevância na Pesquisa
46.19%
The Rochester Center for Biomedical Ultrasound 2006 Annual Report documents research in biomedical ultrasound for imaging and therapy conducted by professionals from the medical, engineering, and applied science communities at the University of Rochester, Rochester General Hospital, and the Rochester Institute of Technology.

Sobreposição de imagens de termografia e ressonância magnética: uma nova modalidade de imagem médica tridimensional

Sanches, Ionildo José
Fonte: Curitiba Publicador: Curitiba
Tipo: Tese de Doutorado Formato: 4,79 MB
POR
Relevância na Pesquisa
46.16%
Infrared (IR) imaging is a noninvasive diagnostic technique that allows the examiner to evaluate and quantify changes on skin surface temperature. Since changes over the human body surface temperature are continuous, it is difficult to associate anatomical details, as well to associate skin temperature with internal structures or organs. Though providing significant information to clinical diagnosis, this technique does not allow evaluating anatomical details of the imaged region. In this work it is presented a new image fusion method for combining 3D Magnetic Resonance Images (or Computed Tomography) and 2D thermal images. The result is a 3D thermographic imaging that can improve medical diagnosis of certain human diseases, such as peripheral vascular disease, diabetic foot, breast and thyroid tumors,sinusitis, cephalalgia, rheumatic disorder and others inflammations process, i.e., diseases that can be diagnosis through the body surface thermal mapping. In the development of this interdisciplinary work of Biomedical Engineering, the knowledge of Digital Image Processing, Computer Graphics, Machine Vision, Computer Programming, Radiology, Medical Imaging and Thermography, was necessary, interacting with areas of Medicine,Computer Science and Electrical Engineering. First...

Detecção do complexo QRS através de morfologia matemática multiescalar

Saraiva, Aratã Andrade
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
POR
Relevância na Pesquisa
46.3%
This work presents the multiscale mathematical morphology with four scales applied in the ECG signal for detection of the QRS complex. To develop this Biomedical Engineering multidisciplinary work were used knowledge of Cardiology, Electrocardiography, Biostatistics, Biomedical Digital Signal Processing, Signal Detection Theory, ROC Analysis and Performance Classifiers Indexes, interacting with areas of Medicine, Statistics, Mathematics, Computer Engineering and Electrical Engineering. The tests were realized with MIT/BIH ECG signals database. The performance of the method was evaluated using ROC curves and the DER index. The results were compared with the multiscale mathematical morphology of one, two and three scales. In the results was observed that the multiscale mathematical morphology with four scales presented better indexes detection of the QRS complex, confirming its potential in biomedical signal processing, supporting the handling of the QRS complex and offering improvements in detection.; Este trabalho apresenta a morfologia matemática multiescalar com quatro escalas aplicada no sinal de eletrocardiografia para a detecção do complexo QRS. Para o desenvolvimento deste trabalho pluridisciplinar de Engenharia Biomédica foram utilizados conhecimentos de Cardiologia...

Caracterización de la gestión del mantenimiento de equipo biomédico en servicios de urgencia de clínicas y hospitales de Medellín en el período 2008-2009; Characterization of the maintenance management of biomedical equipment in emergency services in clinics and hospitals in Medellin period 2008-2009; Caracterização da gestão da manutenção da equipe biomédica em serviços de urgência de clínicas e hospitais de Medellín no período 2008-2009

Orozco Murillo, William; Cortés Mancera, Fabián
Fonte: Universidade do Rosário Publicador: Universidade do Rosário
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em 30/04/2013 SPA
Relevância na Pesquisa
56.25%
La gestión de mantenimiento es una herramienta de gran impacto que apoya al personal de Ingeniería en el desarrollo, control y dirección de programas de mantenimiento para el equipo médico. Objetivo: caracterizar la gestión de mantenimiento en servicios de urgencia de clínicas y hospitales del área metropolitana de Medellín en el período 2008-2009. Materiales y métodos: se realizó una encuesta a jefes y técnicos de mantenimiento en once entidades prestadoras de servicios de salud, clasificadas en tercer nivel y pertenecientes a la red de salud del municipio de Medellín. Resultados: entre las instituciones encuestadas se encontró que la causa de falla más común en los equipos del servicio de urgencia es el mal manejo de los equipos (75%) por partede los operarios y que 70% del mantenimiento es realizado por personal con experiencia en el área (tecnólogos en mantenimiento de equipo biomédico e ingenieros biomédicos). En las once instituciones públicas y privadas encuestadas se halló que solo se contaban con cronogramas de mantenimiento y/o con información desactualizada concerniente a las hojas de vida de los equipos, planes de mantenimiento o adquisición y baja de equipos. Conclusión: el estudio muestra la existencia de debilidades en ciertos puntos de la gestión...

A biomedical device business plan for Medicraften Devices Inc. to develop a fluid medication dispenser

Louison, Charles Davidson
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 32 leaves
ENG
Relevância na Pesquisa
46.24%
This thesis surrounds an analysis to understand what it would take for a company to successfully launch a prescription fluid dispensing device. This device would in theory be able to dispense medication at any time daily in correspondence to a patient's prescription. This thesis does not surround the actual development of a prototype, but gives a clear background into its technology. Other areas of research in this report include potential alliances and acquisitions of this company. This report gives a background into the target market, how the market will benefit from this device, and who the potential competitors of this device could be. Also explored are a potential advisory board for this company and how staff will be organized. Although the people on the advisory board and company's staff do exist, they are not actually involved in the conception of the thesis' device. This thesis uses techniques learned in management, engineering, and biomedical enterprise courses at MIT to give a real world case of how an effective biomedical device company can be formed and effectively managed.; by Charles Davidson Louison.; Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.; Includes bibliographical references (leaf 32).

A Student Team in a University of Michigan Biomedical Engineering Design Course Constructs a Microfluidic Bioreactor for Studies of Zebrafish Development

Shen, Yu-chi; Li, David; Al-Shoaibi, Ali; Bersano-Begey, Tom; Chen, Hao; Ali, Shahid; Flak, Betsy; Perrin, Catherine; Winslow, Max; Shah, Harsh; Ramamurthy, Poornapriya; Schmedlen, Rachael H.; Takayama, Shuichi; Barald, Kate F.
Fonte: Mary Ann Liebert, Inc. Publicador: Mary Ann Liebert, Inc.
Tipo: Artigo de Revista Científica
Publicado em /06/2009 EN
Relevância na Pesquisa
46.2%
The zebrafish is a valuable model for teaching developmental, molecular, and cell biology; aquatic sciences; comparative anatomy; physiology; and genetics. Here we demonstrate that zebrafish provide an excellent model system to teach engineering principles. A seven-member undergraduate team in a biomedical engineering class designed, built, and tested a zebrafish microfluidic bioreactor applying microfluidics, an emerging engineering technology, to study zebrafish development. During the semester, students learned engineering and biology experimental design, chip microfabrication, mathematical modeling, zebrafish husbandry, principles of developmental biology, fluid dynamics, microscopy, and basic molecular biology theory and techniques. The team worked to maximize each person's contribution and presented weekly written and oral reports. Two postdoctoral fellows, a graduate student, and three faculty instructors coordinated and directed the team in an optimal blending of engineering, molecular, and developmental biology skill sets. The students presented two posters, including one at the Zebrafish meetings in Madison, Wisconsin (June 2008).