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Articles 93631 - 93660 of 197991

Full-Text Articles in Engineering

Interactive Training Of Teleoperated Robotic System For Real-Time Mriguided Steerable Needle Intervention, Gang Li Sep 2016

Interactive Training Of Teleoperated Robotic System For Real-Time Mriguided Steerable Needle Intervention, Gang Li

Link Foundation Modeling, Simulation and Training Fellowship Reports

Needle-based interventions, also known as percutaneous interventions, are common approaches for diagnostic and therapeutic procedures including tissue biopsy, delivery of therapeutic agents and tumor ablation. Needle steering, controlling the rotation of needle while inserting, is a clinical technique to produce a curved path to avoid anatomical obstacles (e.g. vasculature and bones) or compensate for placement errors. But, it requires delicate skills and long-term training to accurately steer the needle, due to difficult control of the needle path and lack of intraoperative image feedback. The objective of the proposed project is to develop a clinician-controlled teleoperated robotic system to train and …

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Tidal-Fluvial And Estuarine Processes In The Lower Columbia River: Ii. Water Level Models, Floodplain Wetland Inundation, And System Zones, David A. Jay, Amy B. Borde, Heida Diefenderfer Sep 2016

Tidal-Fluvial And Estuarine Processes In The Lower Columbia River: Ii. Water Level Models, Floodplain Wetland Inundation, And System Zones, David A. Jay, Amy B. Borde, Heida Diefenderfer

Civil and Environmental Engineering Faculty Publications and Presentations

Spatially varying water-level regimes are a factor controlling estuarine and tidal-fluvial wetland vegetation patterns. As described in Part I, water levels in the Lower Columbia River and estuary (LCRE) are influenced by tides, river flow, hydropower operations, and coastal processes. In Part II, regression models based on tidal theory are used to quantify the role of these processes in determining water levels in the mainstem river and floodplain wetlands, and to provide 21-year inundation hindcasts. Analyses are conducted at 19 LCRE mainstem channel stations and 23 tidally exposed floodplain wetland stations. Sum exceedance values (SEVs) are used to compare wetland …

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Pyrolysis Of Dried Wastewater Biosolids Can Be Energy Positive, Patrick J. Mcnamara, Jon Koch, Zhongzhe Liu, Daniel Zitomer Sep 2016

Pyrolysis Of Dried Wastewater Biosolids Can Be Energy Positive, Patrick J. Mcnamara, Jon Koch, Zhongzhe Liu, Daniel Zitomer

Civil and Environmental Engineering Faculty Research and Publications

Pyrolysis is a thermal process that converts biosolids into biochar (a soil amendment), py-oil and py-gas, which can be energy sources. The objectives of this research were to determine the product yield of dried biosolids during pyrolysis and the energy requirements of pyrolysis. Bench-scale experiments revealed that temperature increases up to 500 °C substantially decreased the fraction of biochar and increased the fraction of py-oil. Py-gas yield increased above 500 °C. The energy required for pyrolysis was approximately 5-fold less than the energy required to dry biosolids (depending on biosolids moisture content), indicating that, if a utility already uses energy …

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Influent Wastewater Microbiota And Temperature Influence Anaerobic Membrane Bioreactor Microbial Community, Matthew Seib, K. J. Berg, Daniel Zitomer Sep 2016

Influent Wastewater Microbiota And Temperature Influence Anaerobic Membrane Bioreactor Microbial Community, Matthew Seib, K. J. Berg, Daniel Zitomer

Civil and Environmental Engineering Faculty Research and Publications

Sustainable municipal wastewater recovery scenarios highlight benefits of anaerobic membrane bioreactors (AnMBRs). However, influences of continuous seeding by influent wastewater and temperature on attached-growth AnMBRs are not well understood. In this study, four bench-scale AnMBR operated at 10 and 25 °C were fed synthetic (SPE) and then real (PE) primary effluent municipal wastewater. Illumina sequencing revealed different bacterial communities in each AnMBR in response to temperature and bioreactor configuration, whereas differences were not observed in archaeal communities. Activity assays revealed hydrogenotrophic methanogenesis was the dominant methanogenic pathway at 10 °C. The significant relative abundance of Methanosaeta at 10 °C concomitant …

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Framework For Event-Based Semidistributed Modeling That Unifies The Scs-Cn Method, Vic, Pdm, And Topmodel, Mark Bartlett, Anthony J. Parolari, Jeffrey Mcdonnell, Amilcare Porporato Sep 2016

Framework For Event-Based Semidistributed Modeling That Unifies The Scs-Cn Method, Vic, Pdm, And Topmodel, Mark Bartlett, Anthony J. Parolari, Jeffrey Mcdonnell, Amilcare Porporato

Civil and Environmental Engineering Faculty Research and Publications

Hydrologists and engineers may choose from a range of semidistributed rainfall-runoff models such as VIC, PDM, and TOPMODEL, all of which predict runoff from a distribution of watershed properties. However, these models are not easily compared to event-based data and are missing ready-to-use analytical expressions that are analogous to the SCS-CN method. The SCS-CN method is an event-based model that describes the runoff response with a rainfall-runoff curve that is a function of the cumulative storm rainfall and antecedent wetness condition. Here we develop an event-based probabilistic storage framework and distill semidistributed models into analytical, event-based expressions for describing the …

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Experimental Investigation On Flow Characteristics Of A Four-Wing Micro Air Vehicle, Lisong Shi, Chunkit Uy, Shih K. Huang, Zifeng Yang, George P.G. Huang, Chihyung Wen Sep 2016

Experimental Investigation On Flow Characteristics Of A Four-Wing Micro Air Vehicle, Lisong Shi, Chunkit Uy, Shih K. Huang, Zifeng Yang, George P.G. Huang, Chihyung Wen

Mechanical and Materials Engineering Faculty Publications

The aim of current research work on micro air vehicles is to realize their autonomous control, i.e. building a library for a lookup table that would apply to micro electronics. In doing so, comprehensive flight tests need to be carried out. In this study, a four-wing flapping MAV is built and a multi-discipline approach is used to design the MAV model. Precision manufacturing technology is introduced here. The finished micro air vehicle has a weight of 8 g and is tested for flight by remote control. The micro air vehicle can perform both hovering and forward flight with high maneuverability. …

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Modeling Of Geometric Change Influence On Blast-Wave Propagation In Underground Airways Using A 2d-Transient Euler Scheme, Liang Wang, Sisi Que, Jerry C. Tien, Nassib Aouad Sep 2016

Modeling Of Geometric Change Influence On Blast-Wave Propagation In Underground Airways Using A 2d-Transient Euler Scheme, Liang Wang, Sisi Que, Jerry C. Tien, Nassib Aouad

Mining Engineering Faculty Research & Creative Works

The impact of methane explosions on mining operations can never be over-emphasized. The safety of miners could be threatened and local ventilation facilities are likely to be damaged by the flame and overpressure induced by a methane explosion event, making it essential to understand the destructiveness and influence range of a specific explosion. In this paper, the attenuation effect of geometric changes, most commonly bends, obstacles, and branches, present in the way of blast-wave propagation and the capability of the selected numerical model were studied. Although some relevant experimental research has been provided, quantitative analysis is insufficient. This paper investigates …

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Technology Innovations And The Financial Services Industry., Olubukola Akinniyi Akinwunmi Sep 2016

Technology Innovations And The Financial Services Industry., Olubukola Akinniyi Akinwunmi

Bullion

This article explores the future of the financial services industry in the context of new technologies. Technological innovations were reviewed and likely implications for the industry were highlighted. The article suggests that a symbiotic relationship among new and incumbent financial services providers will benefit the industry. Since technology is re-defining the financial services industry and the global financial system as undergone transformation in the last couple of decades.

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Exploring The Adoption And Use Of The Smartphone Technology In Emerging Regions: Case Of Saudi Arabia, Fahad Aldhaban, Tugrul Unsal Daim, Robert R. Harmon Sep 2016

Exploring The Adoption And Use Of The Smartphone Technology In Emerging Regions: Case Of Saudi Arabia, Fahad Aldhaban, Tugrul Unsal Daim, Robert R. Harmon

Engineering and Technology Management Faculty Publications and Presentations

This paper starts with a preliminary theoretical research model which is developed based on the Unified Theory of Acceptance and Use of Technology (UTAUT). A number of qualitative methods, namely brainstorming, focus group and individual interviews, have been conducted to evaluate, select and validate the existing factors, as well as introduce new factors, to identify only the most related factors to be included in the preliminary research model. A survey questionnaire has been developed and validated to survey general users of the Smartphone in Saudi Arabia. A web-based survey has been designed and sent through email to 5,000 randomly selected …

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Selecting Medical Hardware Using Pairwise Comparisons: A Patient's Perspective Of Cochlear Implant Device Selection, Timothy R. Anderson, Shabnam Razeghian Jahromi Sep 2016

Selecting Medical Hardware Using Pairwise Comparisons: A Patient's Perspective Of Cochlear Implant Device Selection, Timothy R. Anderson, Shabnam Razeghian Jahromi

Engineering and Technology Management Faculty Publications and Presentations

Selecting medical hardware can be a difficult and permanent decision for patients that they are often unprepared for. The authors explore the use of pairwise comparison techniques to better inform medical decision making in an application of choosing between three major cochlear implant manufacturers. This paper appears to be the first study to apply a pairwise comparison decision making approach for cochlear implant device selection. Also, unlike many medical decision making studies that are developed by the healthcare professional, this model and analysis was conducted entirely by the patient for the purpose of making the real-world decision of a device. …

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Managing Technology In Financial Innovation, Frederick Betz Sep 2016

Managing Technology In Financial Innovation, Frederick Betz

Engineering and Technology Management Faculty Publications and Presentations

The topic of managing technology had traditionally focused upon the manufacturing industries; but the service industries grew to become a major sector of industry and commerce. We examine how to manage technology in the financial commercial sector. What is innovation in the financial sector? How does innovation occur in the financial sector? What are the criteria of technology safety in financial innovations? Why did financial innovation contribute to financial instabilities, such as the Global Financial Crisis of 2007-08? Why had governmental agencies failed to properly regulate the financial sector for safety? How did U.S. government financial agencies handle that financial …

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An Inductive Ethnographic Study In Elderly Woman Technology Adoption And The Role Of Her Children, Noshad Rahimi, Antonie J, Jetter, Charles M. Weber Sep 2016

An Inductive Ethnographic Study In Elderly Woman Technology Adoption And The Role Of Her Children, Noshad Rahimi, Antonie J, Jetter, Charles M. Weber

Engineering and Technology Management Faculty Publications and Presentations

Elderly woman strives to have a streamlined life surrounded by ease and familiarity. As she is aging, her desire for simplicity grows, her self-efficacy weakens, her prudency intensifies and her overall inclination toward status quo strengthens. As a result, she delays, or refuses, making any decision that might bring complexity and disrupt the continuity in her life, particularly new and unfamiliar technologies (which often bring complexity, before providing ease). Consequently, her technology adoption has a much lower rate than that of other demographics. To open the black box of elderly woman technology adoption process, this study focuses on the role …

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Consistency Thresholds For Hierarchical Decision Model, Mustafa S. Abbas, Dundar F. Kocaoglu Sep 2016

Consistency Thresholds For Hierarchical Decision Model, Mustafa S. Abbas, Dundar F. Kocaoglu

Engineering and Technology Management Faculty Publications and Presentations

The objective of this research is to establish consistency thresholds linked to alpha (α) levels for HDM's (Hierarchical Decision Model) judgment quantification method. Measuring consistency in order to control it is a crucial and inseparable part of any AHP/HDM experiment. The researchers on the subject recommend establishing thresholds that are statistically based on hypothesis testing, and are linked to the number of decision variables and a level. Such thresholds provide the means with which to evaluate the soundness and validity of an AHP/HDM decision. The linkage of thresholds to a levels allows the decision makers to set an appropriate inconsistency …

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A Model Of Academic Community Entrepreneurship (Ace): Initiation, Innovation, And Impacts Of Picmet, Min-Seok Cha Sep 2016

A Model Of Academic Community Entrepreneurship (Ace): Initiation, Innovation, And Impacts Of Picmet, Min-Seok Cha

Engineering and Technology Management Faculty Publications and Presentations

Entrepreneurship is the process of creating problem solving system that generate knowledge and provide value. It is also seen as an innovation engine. It could be applied in many fields including academic community. This attempt of creating academic community can be view as an academic entrepreneurship. The impactful process of academic entrepreneurship is worthwhile to be noticed and shared. Because PICMET has shown a model of building a sustainable scholar community and its coordinating organization in the international level, it could be a successful case of academic community entrepreneurship (ACE) Model. ACE is focused on creating new value of academic …

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Technology Planning For Emerging Business Model And Regulatory Integration: The Case Of Electric Vehicle Smart Charging, Kelly Cowan, Tugrul U. Daim Sep 2016

Technology Planning For Emerging Business Model And Regulatory Integration: The Case Of Electric Vehicle Smart Charging, Kelly Cowan, Tugrul U. Daim

Engineering and Technology Management Faculty Publications and Presentations

Smart grid has been described as the Energy Internet: Where Energy Technology meets Information Technology. The incorporation of such technology into vast existing utility infrastructures offers many advantages, including possibilities for new smart appliances, energy management systems, better integration of renewable energy, value added services, and new busiss models, both for supply-and demand-side management. This paper proposes to build upon existing roadmapping processes by considering an integrated set of factors, including policy issues, that are specifically tuned to the needs of smart grid and have not generally been considered in other types of roadmapping efforts. It will also incorporate expert …

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A Framework For Technology Transfer Potential Assessment, Judith Estep, Tugrul U. Daim Sep 2016

A Framework For Technology Transfer Potential Assessment, Judith Estep, Tugrul U. Daim

Engineering and Technology Management Faculty Publications and Presentations

This paper is motivated by a need to move research into application, specifically in the utility industry. There are many challenges facing the industry: an aging infrastructure, a growing population, and aggressive energy efficiency targets are just a few examples. Many technologies exist or are in development but the rate at which they are being adopted is slow. Despite a clear need to apply research results to the utility industry, a cursory review of how research proposals are evaluated within the utility industry confirms that technology transfer is only peripherally addressed. In addition, there is no mechanism to quantitatively assess …

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Technology Readiness, Market Readiness And The Triple Bottom Line: An Empirical Analysis Of Innovating Startups In An Incubator, Rainer Hasenauer, Andreas Gschöpf, Charles Weber Sep 2016

Technology Readiness, Market Readiness And The Triple Bottom Line: An Empirical Analysis Of Innovating Startups In An Incubator, Rainer Hasenauer, Andreas Gschöpf, Charles Weber

Engineering and Technology Management Faculty Publications and Presentations

This paper shares the experiences of INITS, a business incubator located in Vienna, Austria, which consults to startup firms in Austria and (with partners) in Europe. INITS has investigated the technology readiness levels and market readiness levels of 57 startup firms in a variety of industries, who are engaged in social or environmental entrepreneurship, where the impact motive prevails over the profit motive. Thus, INITS provides 57 longitudinal case studies of social and environmental innovation in startup firms that have gone through the complete incubation process. Thirteen of these cases underwent an 'open incubation' process developed by INITS. INITS has …

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Survey Of Value Assessment Programs Within Transportation Construction Projects In U.S, Rafaa Khalifa, Robert Stewart Sep 2016

Survey Of Value Assessment Programs Within Transportation Construction Projects In U.S, Rafaa Khalifa, Robert Stewart

Engineering and Technology Management Faculty Publications and Presentations

In order to deliver transportation project on time and within budget, project planners and decision makers need to understand the desirable outcomes of projects or programs to make intelligent decisions. In addition, they also need effective tools and techniques to guide those decisions. In development of a guide that identifies available tools and techniques to foster useable and improved practices for key stakeholders of transportation projects, this paper as a preliminary study assessed current utilization of project delivery value improvement programs such as value engineering (VE), risk analysis/management (RA/RM) and constructability reviews (CR) for transportation projects. To determine whether states …

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Managing The Ethical And Risk Implications Of Rapid Advances In Artificial Intelligence: A Literature Review, Taylor Meek, Husam Barham, Nader Beltaif, Amani Kaadoor, Tanzila Akhter Sep 2016

Managing The Ethical And Risk Implications Of Rapid Advances In Artificial Intelligence: A Literature Review, Taylor Meek, Husam Barham, Nader Beltaif, Amani Kaadoor, Tanzila Akhter

Engineering and Technology Management Faculty Publications and Presentations

The development of emergent technologies carries with it ethical issues and risks. We review ways to better manage the ethical issues and risks of one emerging technology: Artificial Intelligence (AI). Depending on how AI's development is managed, it may have beneficial and/or deleterious effects. The processing capacity of Tianhe-2, the world's fastest supercomputer, by some measures, exceeds the processing capacity of a single human brain. but at a prohibitive processing/power consumption ratio and physical size. Given the current pace of AI R&D activities, some estimates in the literature suggest that the technology could become capable of self-determination and super intelligence …

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Realization Of Point Planar Elastic Behaviors Using Revolute Joint Serial Mechanisms Having Specified Link Lengths, Shuguang Huang, Joseph M. Schimmels Sep 2016

Realization Of Point Planar Elastic Behaviors Using Revolute Joint Serial Mechanisms Having Specified Link Lengths, Shuguang Huang, Joseph M. Schimmels

Mechanical Engineering Faculty Research and Publications

This paper presents methods for the realization of 2 × 2 translational compliance matrices using serial mechanisms having only revolute joints, each with selectable compliance. The link lengths of the mechanism and the location of the compliant frame relative to the mechanism base are arbitrary but specified. The realizability of a given compliant behavior is investigated, and necessary and sufficient conditions for the realization of a given compliance with a given mechanism are obtained. These realization conditions are interpreted in terms of geometric relationships among the joints. We show that, for an appropriately sized 3R serial mechanism, any single 2 …

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A Hierarchical Decision Model (Hdm) For Exploring The Adoption Of Electronic Health Records, Caroline Mudavadi, Liliya Hogaboam, Tugrul Unsal Daim Sep 2016

A Hierarchical Decision Model (Hdm) For Exploring The Adoption Of Electronic Health Records, Caroline Mudavadi, Liliya Hogaboam, Tugrul Unsal Daim

Engineering and Technology Management Faculty Publications and Presentations

Information systems have been making a noticeable entrance in the healthcare, although their adoption has been slow. This paper examines the factors influencing the electronic healthcare records (EHR) adoption by modeling behavioral intention of physicians towards EHR adoption. Three main criteria: perceived usefulness, perceived ease of use and external factors along with the subcriteria, are studied by the authors. Analytical hierarchical process (AHP) model is tested through the expert judgment quantification of physicians in Portland metro area. The results showed high importance of the Perceived Ease of Use criteria on the behavioral intensions of physicians towards EHR adoption. Search ability …

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Impacts To Productivity In Metal Stud Framing, And The Hanging And Finishing Of Gypsum Drywall, Gerald H. Williams Jr., Timothy R. Anderson Sep 2016

Impacts To Productivity In Metal Stud Framing, And The Hanging And Finishing Of Gypsum Drywall, Gerald H. Williams Jr., Timothy R. Anderson

Engineering and Technology Management Faculty Publications and Presentations

Stud Framing, Drywall, and Tape and Finishing trade-work is a major component of every building project. Labor productivity is the largest single variable affecting of the Framing and Drywall contractors' cost of performance. In spite of these facts, no major study of labor productivity in this major construction trade has previously been done. This study was undertaken to fill this gap in the literature; specifically to investigate external impacts to labor productivity in this construction sector. The study measured the impact of thirty-eight (38) variables on 226 separate projects. The study found that poor quality design documents, unexpected labor congestion, …

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Comparative Analysis For Fuzzy Cognitive Mapping, Byung Sung Yoon, Antoine J. Jetter Sep 2016

Comparative Analysis For Fuzzy Cognitive Mapping, Byung Sung Yoon, Antoine J. Jetter

Engineering and Technology Management Faculty Publications and Presentations

Fuzzy Cognitive Mapping (FCM) is a semi-quantitative system modeling technique that is used in technology management to capture, synthesize and analyze expert and stakeholder knowledge for the purpose of technology assessment, product planning, and scenario studies. The resulting FCM models are generated in interviews, focus groups, or workshops and represent complex and dynamic systems as elements (so-called concepts) and cause-and-effect relationships. Researchers often compare FCM to investigate cognitive differences between individuals or groups, identify unique perspectives on a specific topic, or track changes in knowledge (i.e. learning). Using a variety of metrics, comparison studies investigate diverse characteristics of FCMs, such …

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Numerical Modeling Of Dust Dynamics Around Small Asteroids, William Yu, Joseph J. Wang, Daoru Frank Han Sep 2016

Numerical Modeling Of Dust Dynamics Around Small Asteroids, William Yu, Joseph J. Wang, Daoru Frank Han

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Dynamics of dust transport around an airless body has been a focused area of research in recent years, however, various challenging aspects still remain to be addressed. This paper presents an investigation of charged dust transport and distribution around small asteroids utilizing a full particle Particle-in-Cell (PIC) model to simulate plasma flow around an asteroid and calculate surface charging self-consistently from charge deposition on asteroid. Material properties of asteroid are also explicitly included in the simulation. PIC simulation results are fed into a 3D dust dynamics model to simulate charged dust levitation, transport and distribution. In addition to electrostatic and …

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All-Metal Structural Color Printing Based On Aluminum Plasmonic Metasurfaces, Z. Li, W. Wang, D. Rosenmann, D. Czaplewski, Xiaodong Yang, Jie Gao Sep 2016

All-Metal Structural Color Printing Based On Aluminum Plasmonic Metasurfaces, Z. Li, W. Wang, D. Rosenmann, D. Czaplewski, Xiaodong Yang, Jie Gao

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

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The Concentration Of Stress At The Rotator Cuff Tendon-To-Bone Attachment Site Is Conserved Across Species, F. Saadat, A. C. Deymier, Victor Birman, S. Thomopoulos, G. M. Genin Sep 2016

The Concentration Of Stress At The Rotator Cuff Tendon-To-Bone Attachment Site Is Conserved Across Species, F. Saadat, A. C. Deymier, Victor Birman, S. Thomopoulos, G. M. Genin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

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Time-Domain Partial Element Equivalent Circuit Solver Including Non-Linear Magnetic Materials, Daniele Romano, Giulio Antonini, Albert E. Ruehli Sep 2016

Time-Domain Partial Element Equivalent Circuit Solver Including Non-Linear Magnetic Materials, Daniele Romano, Giulio Antonini, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a novel partial element equivalent circuit formulation to handle 3-D non-linear problems. Since the displacement currents are taken into account, the proposed formulation is not restricted to low-frequency applications, although the propagation delays are neglected. The non-linear problem is solved by means of the Newton-Raphson algorithm. Special care is taken in order to analytically compute the Jacobian of the problem. Furthermore, an adaptive setting of the time step is adopted in the transient analysis allowing to maintain the size of the time step as large as possible while preserving the accuracy. Computed results for a closed magnetic …

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Haptic Shape-Based Management Of Robot Teams In Cordon And Patrol, Samuel Jacob Mcdonald Sep 2016

Haptic Shape-Based Management Of Robot Teams In Cordon And Patrol, Samuel Jacob Mcdonald

Theses and Dissertations

There are many current and future scenarios that require teams of air, ground or humanoid robots to gather information in complex and often dangerous environments, where it would be unreasonable or impossible for humans to be physically present [1-6]. The current state of the art involves a single robot being monitored by one or many human operators [7], but a single operator managing a team of autonomous robots is preferred as long as effective and time-efficient management of the team is maintained [8-9]. This is limited by the operator's ability to command actions of multiple robots, be aware of robot …

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An Exploration In Fiber Optic Sensors, Frederick Alexander Seng Sep 2016

An Exploration In Fiber Optic Sensors, Frederick Alexander Seng

Theses and Dissertations

With the rise of modern infrastructure and systems, testing and evaluation of specific components such as structural health monitoring is becoming increasingly important. Fiber optic sensors are ideal for testing and evaluating these systems due many advantages such as their lightweight, compact, and dielectric nature. This thesis presents a novel method for detecting electric fields in harsh environments with slab coupled optical sensors (SCOS) as well as a novel method for detecting strain gradients on a Hopkinson bar specimen using fiber Bragg gratings (FBG). Fiber optic electric field sensors are ideal for characterizing the electric field in many different systems. …

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Fall 2016 - Volume 41, Number 1, Full Issue Sep 2016

Fall 2016 - Volume 41, Number 1, Full Issue

The Professional Constructor

No abstract provided.

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