Dissertations / Theses on the topic 'Electrical Engineering'
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Uudelepp, Oscar, Ellen Nordén, and Douglas Lowén. "Electric Bike : Independent Project in Electrical Engineering." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353617.
Full textTandon, Nina. "Biomimetic electrical stimulation for cardiac tissue engineering." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38323.
Full textIncludes bibliographical references (leaves 66-69).
A major challenge of tissue engineering is directing cells to establish the physiological structure and function of the tissue being replaced. Electrical stimulation has been used to induce synchronous contractions of cultured cardiac constructs. The hypothesis adopted for this study is that functional cardiac constructs can be engineered by "mimicking" the conditions present during cardiac development, and in particular, electrical stimulation using supra-threshold signals. For this Master's Thesis research, I have compared the material properties and charge-transfer characteristics at the electrode-electrolyte interface of various biocompatible materials, including carbon, stainless steel, titanium and titanium nitride, for use as electrodes in a biomimetic system for cardiac tissue engineering. I have also designed and implemented an electrical stimulator which is capable of modulating several important parameters of electrical stimulation, including stimulus amplitude and frequency.
(cont.) In addition, I have built an experimental setup incorporating this electrical stimulator and used it for experiments with C2C12 mouse myoblast cells and neonatal rat cardiomyocytes. Lastly, I have analyzed cell morphology as well as functional performance of engineered tissue by assessing excitation thresholds and maximum capture rates.
by Nina Tandon.
S.M.
Björklund, Marcus, and Eric Fjärstedt. "Active Stabilizer : Independent Project in Electrical Engineering." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324765.
Full textKhrapach, Ivan. "Engineering the electrical properties of graphene materials." Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/8168.
Full textShi, Bowen. "High performance permanent magnet electrical machine for electrical vehicle applications." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52331/.
Full textLarsson, Erik, and Niklas Kron. "Independent project in electrical engineering : Magnetic hand timepiece." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325637.
Full textBriggs, Jaime C. "Web-based testing tools for Electrical Engineering courses." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397129.
Full textThesis advisors: Crosto. Roberto ; Wu, Thomas. "September 2001." Includes bibliographical references (p. 113-114). Also available online.
Looe, Hui Mun. "Electromagnetic modelling and analysis of electrical engineering systems." Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400238.
Full textPatel, Dipali Dhanji. "Design of experiment on electrical engineering design representations." Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/patel/PatelD0805.pdf.
Full textBernstein, Joseph Barry. "Electrical characterization of polymeric insulation by electrically stimulated acoustic wave measurements." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/54340.
Full textIncludes bibliographical references (leaves 207-211).
by Joseph Barry Bernstein.
Ph.D.
Carnes, Mark T. "Conceptual understanding of threshold concepts of electrical phenomena| Mental models of senior undergraduates in electrical engineering." Thesis, Purdue University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10244516.
Full textEvery field of study has a set of domain-specific concepts that anyone who desires to work in that field must know and understand. Most students who pursue university degrees in engineering trust that their education is designed to provide them with this knowledge. But does it? In electrical engineering (EE), conceptual understanding of electrical phenomena has rarely been addressed. Even though the presumed goal of instructors and students alike is to learn the concepts of electrical phenomena well enough to be able to use the concepts to design useful things, it is difficult to determine whether this goal is being achieved. The purpose of this study was to develop reasonable representations of the mental models used by senior EE students as they thought about and worked with electrical phenomena. Focusing on students’ mental models of threshold concepts in electrical phenomena can thus increase knowledge of students’ conceptual understanding, which can contribute to systematic research into pedagogical and assessment methods in this area of study, which forms one of the most basic and fundamental areas of knowledge needed by EE students.
Thus, the research question addressed by this study was:
What do senior EE students’ mental models of the fundamental electrical phenomena of voltage, current, and the relationship between them look like?
The theory of mental models claims that everyone organizes their understanding of the way the world works by constructing models in the mind by which they both explain phenomena that they observe, and make predictions about what is likely to occur in a given situation.
To observe the students’ mental models in operation, semi-structured interviews were used to engage the participants in a conversation concerning their knowledge and experience in applying electrical ideas. Using discourse analysis, a representation of each student’s mental model was created, consisting of a concept map and a short narrative. While the models were all different, analysis of them as a group led to the emergence of five dominant themes, or ways of thinking.
The findings of this study have implications for the course of study that these students are engaged in. How effective has it been in developing the conceptual understanding that they will need after they graduate? Knowledge of the outcomes of a course of study: the conceptual understanding of these students, the misconceptions present in their models, and the dominant themes that drive their models, can inform ongoing efforts in curriculum development.
South, G. "A technique for measuring the electrical impedance of mechanical joints in electrically conductive structures." Thesis, University of Central Lancashire, 1992. http://clok.uclan.ac.uk/20064/.
Full textTam, Wvi Huat. "Web-based teaching and learning of Electrical Engineering Courses." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA390419.
Full textThesis advisor(s): Butler, Jon T. "March 2001." Includes bibliographical references (p. 103). Also available in print.
Orgunmat, Kaan. "Heatapp - Remote TemperatureController Project : Degree Project in Electrical Engineering." Thesis, Blekinge Tekniska Högskola, Avdelningen för elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-866.
Full textSellergren, Albin, Tobias Andersson, and Jonathan Toft. "Signal processing through electroencephalography : Independent project in electrical engineering." Thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298771.
Full textelectroencephalography, EEG
Akaslan, Dursun. "A model for supporting electrical engineering with e-learning." Thesis, University of Leicester, 2014. http://hdl.handle.net/2381/29066.
Full textBalavendran, Joseph Rani Deepika. "Gamification to Solve a Mapping Problem in Electrical Engineering." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703330/.
Full textChien, Yu-Chien. "Electrical Aspects of Impinging Flames." Thesis, University of California, Irvine, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3682710.
Full textThis dissertation examines the use of electric fields as one mechanism for controlling combustion as flames are partially extinguished when impinging on nearby surfaces. Electrical aspects of flames, specifically, the production of chemi-ions in hydrocarbon flames and the use of convective flows driven by these ions, have been investigated in a wide range of applications in prior work but despite this fairly comprehensive effort to study electrical aspects of combustion, relatively little research has focused on electrical phenomena near flame extinguishment, nor for flames near impingement surfaces. Electrical impinging flames have complex properties under global influences of ion-driven winds and flow field disturbances from the impingement surface. Challenges of measurements when an electric field is applied in the system have limited an understanding of changes to the flame behavior and species concentrations caused by the field. This research initially characterizes the ability of high voltage power supplies to respond on sufficiently short time scales to permit real time electrical flame actuation. The study then characterizes the influence of an electric field on the impinging flame shape, ion current and flow field of the thermal plume associated with the flame. The more significant further examinations can be separated into two parts: 1) the potential for using electric fields to control the release of carbon monoxide (CO) from surface-impinging flames, and 2) an investigation of controlling electrically the heat transfer to a plate on which the flame impinges. Carbon monoxide (CO) results from the incomplete oxidation of hydrocarbon fuels and, while CO can be desirable in some syngas processes, it is usually a dangerous emission from forest fires, gas heaters, gas stoves, or furnaces where insufficient oxygen in the core reaction does not fully oxidize the fuel to carbon dioxide and water. Determining how carbon monoxide is released and how heat transfer from the flame to the plate can be controlled using the electric field are the two main goals of this research. Multiple diagnostic techniques are employed such as OH chemiluminescence to identify the reaction zone, OH PLIF to characterize the location of this radical species, CO released from the flame, IR imaging and OH PLIF thermometry to understand the surface and gas temperature distribution, respectively. The principal finding is that carbon monoxide release from an impinging diffusion flame results from the escape of carbon monoxide created on the fuel side of the flame along the boundary layer near the surface where it avoids oxidation by OH, which sits to the air side of the reaction sheet interface. In addition, the plate proximity to the flame has a stronger influence on the emission of toxic carbon monoxide than does the electric field strength. There is, however, a narrow region of burner to surface distance where the electric field is most effective. The results also show that heat transfer can be spatially concentrated effectively using an electric field driven ion wind, particularly at some burner to surface distances.
Beardsmore-Rust, Sam Thomas. "Remote applications of electric potential sensors in electrically unshielded environments." Thesis, University of Sussex, 2010. http://sro.sussex.ac.uk/id/eprint/2407/.
Full textAhmadi, Teshnizi Amir Pouya, Marcus Hellström, Tom Bärnheim, and Hassan Soltani. "IoT Air Quality Sensor Array : Master's Programme in Electrical Engineering." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448142.
Full textSolander, Araúz Ingemar. "The Effect of Harmonics on the Electrical Grid due to Electric Vehicle Chargers." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-428756.
Full textPotgieter, L. "Circuit tutor : a computer-aided learning package for electrical engineering." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/23322.
Full textJia, Chen. "Higher-level learning in an electrical engineering linear systems course." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19171.
Full textElectrical and Computer Engineering
Steven Warren
Linear Systems (a.k.a., Signals and Systems) is an important class in an Electrical Engineering curriculum. A clear understanding of the topics in this course relies on a well-developed notion of lower-level mathematical constructs and procedures, including the roles these procedures play in system analysis. Students with an inadequate math foundation regularly struggle in this class, as they are typically able to perform sequences of the underlying calculations but cannot piece together the higher-level, conceptual relationships that drive these procedures. This dissertation describes an investigation to assess and improve students’ higher-level understanding of Linear Systems concepts. The focus is on the topics of (a) time-domain, linear time-invariant (LTI) system response visualization and (b) Fourier series conceptual understanding, including trigonometric Fourier series (TFS), compact trigonometric Fourier series (CTFS), and exponential Fourier series (EFS). Support data, including exam and online homework data, were collected since 2004 from students enrolled in ECE 512 - Linear Systems at Kansas State University. To assist with LTI response visualization, two online homework modules, Zero Input Response and Unit Impulse Response, were updated with enhanced plots of signal responses and placed in use starting with the Fall 2009 semester. To identify students’ conceptual weaknesses related to Fourier series and to help them achieve a better understanding of Fourier series concepts, teaching-learning interviews were applied between Spring 2010 and Fall 2012. A new concept-based online homework module was also introduced in Spring 2011. Selected final exam problems from 2007 to 2012 were analyzed, and these data were supplemented with detailed mid-term and final exam data from 77 students enrolled in the Spring 2010 and Spring 2011 semesters. In order to address these conceptual learning issues, two frameworks were applied: Bloom’s Taxonomy and APOS theory. The teaching-learning interviews and online module updates appeared to be effective treatments in terms of increasing students’ higher-level understanding. Scores on both conceptual exam questions and more traditional Fourier series exam questions were improved relative to scores received by students that did not receive those treatments.
Glendinning, D. Duncan R. Carleton University Dissertation Engineering Electrical. "A personal workstation based CAD environment for electrical engineering education." Ottawa, 1985.
Find full textAl, Kzair Christian, Altin Januzi, and Andreas Blom. "Understanding the fundamentals of CPU architecture : Bachelor project in Electrical engineering." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353427.
Full textLewis, Racheida Sharde. "The Influences of First-Year Engineering Matriculation Structures on Electrical and Computer Engineering Students' Self-Efficacy." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/103325.
Full textDoctor of Philosophy
While first-year engineering (FYE) programs have grown dramatically over the last 30 years, they take a variety of different structures. However, few if any, researchers and FYE program developers have considered how program structure impacts persistence – an issue that continues to be of concern as we seek to grown the national engineering workforce. Low retention rates combined with lack of diversity in the field becomes even more intense when considering the field of Electrical and Computer Engineering (ECE) which ranks as one of the least diverse engineering disciplines. One factor that has been shown to support retention is self-efficacy or individuals' beliefs in their ability to succeed. Therefore, to help address the retention issues in ECE, this dissertation explores the programmatic influence of first-year engineering matriculation structures on self-efficacy development in electrical and computer engineering students. In particular, it compares declared engineering (DE) programs, which admit students to a specific engineering field, to general engineering (GE) programs, in which students are admitted to engineering but do not select a specific engineering field until after their first year. The dissertation includes three studies: 1) a quantitative comparison of expectancy (similar to self-efficacy) beliefs in a GE program and a quasi- DE first-year engineering program for ECE students; 2) a qualitative study of self-efficacy development in a DE first-year program using interviews with students; and 3) a qualitative study of similarities and differences in self-efficacy development in EE students at two universities, one with a DE program and one with a GE program. The studies demonstrated similarities in self-efficacy development in students from the DE and GE programs, with differences largely attributed to how students described self-efficacy, as follows: 1) self-efficacy is developed differently between the two programs because the tasks associated with each program are different; 2) GE students discuss self-efficacy more broadly regarding engineering in general, focusing on issues like professional development skills; 3) DE students discuss self-efficacy development more narrowly, specifically related to being an electrical or computer engineer. Additionally, the findings from study 2 suggest that approaches to teaching may be more important for self-efficacy development than matriculation structures. These results broaden our understanding of how FYE programs impact self-efficacy development within the context of a specific major, but also point to the need for more research on factors most related to persistence and the experiences of underrepresented minorities in engineering.
Goel, Vishu. "Novel coating technologies for electrical steels." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/93813/.
Full textAkyol, Fatih. "Nanoscale Electron Transport Engineering for GaN Optoelectronic Devices." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1462897011.
Full textKuc, Bernard. "Evaluation of virtual reality technology for control engineering." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/16093.
Full textVirtual Reality technology has over recent years become available for commercial use. Where initially it had only been available to research centres and the military, it is now accessible to the industrial and commercial sectors. What this dissertation covers is the suitability of the low cost end of the Virtual Reality hardware for use in Control Engineering. The use of Virtual Reality within Control Engineering could impart significant advantages over traditional control rooms currently in use in factories. The primary one, as rated by most commercial ventures, would be the cost saving of replacing all the physical hardware in a control room with virtual counter-parts in software. This is assuming that the Virtual Reality hardware will itself be of sufficiently low cost. The second is its ability to be used for operator training in instances where factors of safety and economics cannot allow for mistakes to be made on the real plant. A third advantage of a virtual control room, is its portability. As long as the factory can be accessed through some computer network, then the control room can be moved to any desired location. For example a copy of the control room for each factory can be maintained at head office where a chief engineer can occasionally check up on plant performance.
Lehr, Rainer Helmut. "Web based distance learning for power system engineering." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/5186.
Full textWang, Yingxu. "Software engineering process modelling analysis." Thesis, Southampton Solent University, 1998. http://ssudl.solent.ac.uk/2429/.
Full textVieri, Carlin James. "Reversible computer engineering and architecture." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80144.
Full textIncludes bibliographical references (p. 162-165).
by Carlin James Vieri.
Ph.D.
Slottow, Edward C. (Edward Colin). "Engineering a global resolution service." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43506.
Full textIncludes bibliographical references (p. 99-100).
by Edward C. Slottow.
M.Eng.
Ye, Yufeng S. M. Massachusetts Institute of Technology. "Nonlinearity engineering with the Quarton." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127318.
Full textCataloged from the official PDF of thesis.
Includes bibliographical references (pages 59-62).
In this thesis, we show the principles and applications of a new technique we call "nonlinearity engineering" using a recent superconducting qubit, the Quarton. In traditional nonlinear optics, nonlinear effects are usually weak perturbations to linear interactions. Similarly, microwave quantum optics with superconducting circuits relies on the Josephson junction for a negative Kerr nonlinearity that is much weaker than its associated linear energy. Recently, a new superconducting qubit known as the "Quarton" can offer non-perturbatively strong nonlinearity. Here, we demonstrate the general principle of using the Quarton's positive Kerr and zero linear energy to perform nonlinearity engineering, i.e. the selective design of the nonlinear properties of microwave artificial atoms, metamaterials, and photons in a manner that (to the best of our knowledge) has no optical analog. We show that for Quarton mediated light-matter coupling, the Quarton can erase or amplify the nonlinearity of artificial atoms and metamaterials. Without nonlinearity, matter behaves light-like and we find (to our best knowledge) the first theoretical demonstration of cross-Kerr between linear microwave photon modes. We extend these fundamental results and provide a practical application by designing a Josephson traveling wave photon detector
by Yufeng Ye.
S.M.
S.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
Gao, Fei. "Decentralised control and stability analysis of a multi-generator based electrical power system for more electric aircraft." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37955/.
Full textZhang, Yuxi Ph D. Massachusetts Institute of Technology. "Electrospun nanofibers with tunable electrical conductivity." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81690.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 114-117).
Electrospinning is a convenient method to produce nanofibers with controlled diameters on the order of tens to hundreds of nanometers. The resulting nonwoven fiber mats are lightweight, highly porous, and have high specific surface areas around 1 to 100 m2/g. Combined with the high electrical conductivity of intrinsically conductive polymers, conductive electrospun fiber mats are promising for a variety of applications, such as multifunctional textiles, resistance-based sensors, flexible reversibly hydrophobic surfaces, organic photovoltaics, scaffolds for tissue engineering, and conductive substrates for surface functionalization and modification Intrinsically conductive polymers, such as polyaniline (PAni), however, are relatively hard to Intrinsically conductive polymers, such as polyaniline (PAni), however, are relatively hard to process compared to most other polymers. They have fairly rigid backbones due to the high aromaticity, and are usually available only in relatively low molecular weight forms, so that the elasticity of their solutions is insufficient for it to be electrospun directly into fibers. Considerable amount of recent work has been reported trying to make electrospun polymeric nanofibers with intrinsically conductive polymers or composites. However, a large fraction of the work only showed the morphology and did not characterize the actual performance of these fibers, nor did they test the variability of the fibers and mats from a wide range of processing conditions and resulting structures. Therefore, this thesis aims to make a comprehensive study of the electrical tunability of electrospun fibers with intrinsically conductive polymers and its composites, to establish a clear processing-structure-property relationship for these fibers and fiber mats, and to test the resultant fibers with the targeted applications such as gas sensing. We have first developed a reliable method to characterize fiber electrical conductivity using interdigitated electrodes (IDE) and high-impedance analyzers with contact-resistance corrections, and applied to electrospun conductive polymer nanofibers. This method was shown to be reliable and sensitive, as opposed to some of the other methods that have been reported in literature. Facing with the challenge of overcoming the relatively low elasticity of the conductive polymer solutions to achieve electrospinnability, we have fabricated electrospun fibers of PAni and poly(3,4-ethylenedioxythiophene) (PEDOT), blended with poly(ethylene oxide) (PEO) or poly(methyl methacrylate) (PMMA) over a range of compositions. Pure PAni (doped with (+)- camphor-i 0-sulfonic acid (HCSA)) fibers were successfully fabricated for the first time by co-axial electrospinning and subsequent removal of the PMMA shell by dissolution. This allowed for the pure electrospun PAni/HCSA fibers to be tested for electrical performances and its enhancement as well as gas sensing application. The conductivities of the PAni-blend fibers are found to increase exponentially with the weight percent of doped PAni in the fibers, to as high as 50 ± 30 S/cm for as-electrospun fibers of 100% PAni/HCSA. This fiber conductivity of the pure doped PAni fibers was found to increase to 130 ± 40 S/cm with increasing molecular orientation, achieved through solid state drawing. The experimental results thus support the idea that enhanced molecular alignment within electrospun fibers, both during the electrospinning process and subsequent post-treatment, contributes positively to increasing electrical conductivity of conductive polymers. Using a model that accounts for the effects of intrinsic fiber conductivity (including both composition and molecular orientation), mat porosity, and the fiber orientation distribution within the mat, calculated mat conductivities are obtained in quantitative agreement with the mat conductivities measured experimentally. This correlation, along with the reliable method of fiber conductivity measurement by IDE, presents a way to resolve some of the inconsistencies in the literature about reporting electrical conductivity values of electrospun fibers and fiber mats. Pure PAni fibers with different levels of doping were also fabricated by co-axial electrospinning and subsequent removal of the shell by dissolution, and shown to exhibit a large range of fiber electrical conductivities, increasing exponentially with increasing ratio of dopant to PAni. These fibers are found to be very effective nanoscale chemiresistive sensors for both ammonia and nitrogen dioxide gases, thanks to this large range of available electrical conductivities. Both sensitivity and response times are shown to be excellent, with response ratios up to 58 for doped PAni sensing of ammonia and up to more than 105 for nitrogen dioxide sensing by undoped PAni fibers. The characteristic times for the gas sensing are shown to be on the order of 1 to 2 minutes. We have also developed a generic time-dependent reaction-diffusion model that accounts for reaction kinetics, reaction equilibrium, and diffusivity parameters, and show that the model can be used to extract parameters from experimental results and used to predict and optimize the gas sensing of fibers under different constraints without the need to repeat experiments under different fiber and gas conditions.
by Yuxi Zhang.
Ph.D.
Proctor, Laura L. (Laura Lynne) 1975. "Tissue electrical impedance determination via microneedles." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/89893.
Full textMIT Institute Archives copy bound: p. 1-78, 81-82, 79-80, 83-101.
Vita.
Includes bibliographical references (p. 81-84).
by Laura L. Proctor.
S.M.
Cho, Margaret H. (Margaret Hyunjoo) 1982. "Environmental constituents of Electrical Discharge Machining." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32827.
Full textIncludes bibliographical references (leaves 30-31).
Electrical Discharge Machining (EDM) is a non-traditional process that uses no mechanical forces to machine metals. It is extremely useful in machining hard materials. With the advantages EDM has to offer and its presence as a common and useable technique, along with the other machining processes available to the industrial world, there is an added strain on the environment. The scope of this thesis includes analyzing the various inputs into EDM and the resulting outputs into the environment. A simplified model is used to analyze the process. The main categories of flow scrutinized in the model are material flow and energy flow. The most hazardous effect to the environment is found in the resin interaction of the wire EDM process where depending on the type of material machined, there is a potential presence of hazardous materials. There are efforts to recycle all salvageable materials such as wire and metal wastes, but currently no accountability system exists as manufacturers are responsible for their actions.
by Margaret H. Cho.
S.B.
Lanka, Avinash. "Electrical Characterization and Applications of Supercapacitors." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1472052551.
Full textVentura, John. "Web-Based evaluation Process for an Electrical and Computer Engineering Department." NSUWorks, 2006. http://nsuworks.nova.edu/gscis_etd/897.
Full textSmith, Philip Hartley. "Electrical Distribution Modeling:An Integration of Engineering Analysis and Geographic Information Systems." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/36158.
Full textMaster of Science
Bandhakavi, Sri Lalitha. "Diversity Management Policies and Practices : Of a Swedish Electrical Engineering MNC." Thesis, Högskolan Dalarna, Institutionen för kultur och samhälle, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:du-37575.
Full textRisemark, Eriksson Martin. "Environmental stress of electrical machine winding insulation." Thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326711.
Full textHenning, Pieter Hendrik. "Control of a 1.5 MW active power filter and regeneration converter for a Spoornet DC traction substation." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2340.
Full textAlthough regenerative braking has been in used in railway systems for a long time already, the energy generated was dissipated in resistor banks. The rapid advances in the power electronics field, accompanied by the development of faster and higher power switching devices in recent years, now make it possible to convert the regenerated electrical energy from DC to AC, which can then be injected into the Eskom grid. A 1.5 MW full scale prototype system was built, installed and tested in a Spoornet DC traction substation. A seven level series-stacked converter topology was used along with a specially designed injection transformer. The system was controlled by the PEC 33 controller board, which was developed at the University of Stellenbosch. The primary function of the system is to function as a regeneration converter and as a secondary function act as an active power filter.
Berrie, Jeffery A. "Measurement of electrical parameters for planar materials /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487759436328874.
Full textHierro, Adrian. "Electrical characterization of defects in n-GaN /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488204276532651.
Full textShahaj, Annabel. "Mitigation of vibration in large electrical machines." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11337/.
Full textKampisios, Konstantinos T. "Electrical machines parameter identification using genetic algorithms." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/14005/.
Full textPatel, Muneeza S. "Algorithms for E. coli genome engineering." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106461.
Full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
"June 2016." Page 90 blank. Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 70-72).
Author summary: Lamba red recombineering is one of methods of performing genome engineering. However, this method of genome editing is not very specific and efficient and is highly dependent on the genomic regions that are targeted (integration sites). In this project we explored ways of identifying what makes a site well suited for lambda red genome engineering. We wanted to explore whether we can eventually predict the "goodness" of an integration site using an algorithm. Our initial approach to the problem was to write an algorithm based on some characteristics that we felt would be key to determining the goodness of a site. Choosing to initially focus on specificity of the integrations, we used experimental approaches to evaluate whether our algorithm had any predictive powers for specificity. Upon failing, we revised our plan to generate a dataset of ~150 sites and their integration data (whether integration was successful, specific and efficient at that site). We used this dataset to explore correlations between the specificity data and characteristics we thought might affect the specificity of sites. The most promising characteristics appeared to be the uniqueness of the genomic site (as determined by BLAST) and the existence of Repetitive Extragenic Palindrome (REP) sites at the site of integration. Section I of this thesis sets up the problem, section II talks about the initial approach we took to the problem and section III discusses our modified approach -- which formed the bulk of this thesis project. Section I and III are the most relevant to understand the project, while Section II gives more content to the project in addition to detailed insight to what approaches did not work.
by Muneeza S. Patel.
M. Eng. in Computer Science & Molecular Biology
Yang, Bob 1976. "Managing a distributed software engineering team." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50394.
Full textIncludes bibliographical references (leaves 97-98).
by Bob Yang.
B.S.
M.Eng.