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Dissertations / Theses on the topic 'Division of Engineering and Applied Sciences'

Author: Grafiati

Published: 28 July 2024

Last updated: 31 July 2025

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1

Toner, Mehmet. "Thermodynamics and kinetics of ice nucleation inside biological cells during freezing : as applied to mouse oocytes." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/29199.

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Thesis (Ph. D.)--Harvard University--Massachusetts Institute of Technology Division of Health Sciences and Technology, Program in Medical Engineering and Medical Physics, 1989.<br>Includes bibliographical references (leaves 372-393).<br>by Mehmet Toner.<br>Ph.D.

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2

Kutscher, Erika. "A spinoffs study applied to the airline industry." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/83794.

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Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 73-74).<br>Airlines have been recently debated the management of some of their non-core divisions, such as the Frequent Flyer Program (FFP).A spinoff is a form of corporate contraction that many companies have recently chosen. Through a spinoff, both the parent company and the divested subsidiary can each focus on their own activity, which translates into a better performance of both entiti

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3

Broniatowski, David André 1982. "A method for analysis of expert committee decision-making applied to FDA medical device panels." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62617.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 254-263).<br>Committees of experts are critical for decision-making in engineering systems. This is because the complexity of these systems requires that information is pooled from across multiple specialties and domains of knowledge. The social elements o

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4

Gamboa, Higuera Juan Camilo. "Distributing work among heterogeneous robots. An approach based on fair division theory." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117171.

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We study the problem of distributing a single global task between a group ofheterogeneous robots. We view this problem as a fair division game. In this setting,every robot defines a preference function over parts of the task according to its sens-ing and motion capabilities. These preferences are described by density functionsover the task. We want to find an allocation of the global task that maximizes theprobability of task completion. We first formulate the task distribution problem as afair subdivision problem and provide a centralized algorithm to compute the alloca-tions for each robot.

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5

Sachs, Gregory (Gregory Dennis). "A principle based system architecture framework applied for defining, modeling & designing next generation smart grid systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62773.

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Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 81).<br>A strong and growing desire exists, throughout society, to consume electricity from clean and renewable energy sources, such as solar, wind, biomass, geothermal, and others. Due to the intermittent and variable nature of electricity from these sources, our current electricity grid is incapable of collecting, transmitting, and distributing this energy effectively. The "Smart Grid" is a

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6

Laracy, Joseph R. (Joseph Raymond). "A systems-theoretic security model for large scale, complex systems applied to the US air transportation system." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39256.

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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, 2007.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 129-132).<br>Classical risk-based or game-theoretic security models rely on assumptions from reliability theory and rational expectations economics that are not applicable to security threats. Additionally, these models suffer from serious deficiencies when they are applied to software-intensive, socio-technical sys

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7

Kaur, Amandeep. "Comparison of Different Predistortion Techniques for Orthogonal Frequency Division Multiplexing Systems." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13426595.

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<p> Wireless channels have significant problems like multipath fading, delay spread, frequency selective fading. Guard bands/channel equalization techniques are employed to overcome these. However, these solutions are complex and don’t solve the issue of bandwidth scarcity. Thus, Orthogonal Frequency Division Multiplexing was introduced; a special case of Frequency Division Multiplexing where orthogonal subcarriers overlap in the frequency domain using lesser bandwidth without any inter-symbol interference. </p><p> The next challenge is to reduce the error rate in transmission. This th

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8

Antoine, Blandine. "Systems Theoretic Hazard Analysis (STPA) applied to the risk review of complex systems : an example from the medical device industry." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79424.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2013.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references.<br>Traditional methods to identify and document hazards, and the corresponding safety constraints, are lacking in their ability to account for human, software and sub-system interactions in highly technical systems. STAMP, a systems-theoretic accident causali

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9

Azpeitia, Camacho Marcia E. (Marcia Edna). "Common global architecture applied to automobile electrical distribution systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59222.

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Thesis (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 111-112).<br>Electrical and electronic components have a prominent role in today's vehicles. Particularly during the last two decades, functionality has been added at an exponential rate, resulting in increased complexity, especially of the Electrical Distribution System (EDS), which is the backbone of the Electrical and Electronic System (EES). Increase

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10

Huang, Hayden. "Cellular responses to mechanical stresses applied via magnetic manipulators." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8349.

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Thesis (Ph.D.)--Harvard--Massachusetts Institute of Technology Division of Health Sciences and Technology, February 2002.<br>Includes bibliographical references (p. 99-103).<br>A mechanotransduction model aims to explain how a cell senses mechanical forces and translates them into molecular events, such as changes in intracellular ion concentrations, gene expression, post-translational protein modification, or cytoskeletal redistribution. Many studies of mechanotransduction explore the responses of cell populations to large and, occasionally, poorly characterized deformation. More recent techn

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11

Seekins, Ryan N. (Ryan Nicholas). "The Internet of things applied to command and control networks." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106263.

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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 92-96).<br>The number of people and things connected to the Internet continue growing at an exponential rate. This record setting growth along with the reduction in small sensor costs and machine learning enabled a concept called the Internet of Things (IoT) to thrive. With numerous applications in both commercial and governm

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12

Abrecht, Blake Ryan. "Systems Theoretic Process Analysis applied to an Offshore Supply Vessel dynamic positioning system." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104618.

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Thesis: S.M. in Engineering Systems, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 84).<br>This research demonstrates the effectiveness of Systems Theoretic Process Analysis (STPA) and the advantages that result from using this new safety analysis method compared to traditional techniques. To do this, STPA was used to analyze a case study involving Naval Offshore Supply Vessels (OSV) that incorporate software-intensive dynamic positioning in supp

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Uesako, Daisuke. "STAMP applied to Fukushima Daiichi nuclear disaster and the safety of nuclear power plants in Japan." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107596.

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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>On March 11, 2011, a huge tsunami generated after the Great East Japan Earthquake triggered an extremely severe nuclear accident at the Fukushima Daiichi Nuclear Power Plant. This thesis analyzes why the stakeholders could not prevent the Fukushima Daiichi nuclear disaster, and, with regard to the future nuclear safety in Japan,

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14

Whitcomb, Jacob A. "The value of power grid flexibility : applied optimization methods for bulk electricity storage and technology RD&D." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/105303.

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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 104-110).<br>As power systems adapt to include aging infrastructure, new socio-political priorities, and renewable electricity resources, grid operators look to a more flexible grid. Electricity storage flexibility is one strategy gaining interest. Clean energy advocates see benefits in terms of greater renewables integration and lower emissions; grid operators see storage as an improved sec

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Prasannan, Sooraj. "A macro-micro system architecture analysis framework applied to Smart Grid meter data management systems by Sooraj Prasannan." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59009.

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Thesis (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 109-111).<br>This thesis proposes a framework for architectural analysis of a system at the Macro and Micro levels. The framework consists of two phases -- Formulation and Analysis. Formulation is made up of three steps -- Ide

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Huang, Kenneth Guang-Lih 1978. "Innovation in the life sciences : the impact of intellectual property rights on scientific knowledge diffusion, accumulation and utilization." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37968.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2006.<br>Includes bibliographical references.<br>The impact of intellectual property rights on the production, diffusion and accumulation of scientific knowledge has been a central concern of public policymakers and economists in both public and private institutions, and scholars in management economics and sociology. In this dissertation, I examine the central patenting debates over the role of patenting the life sciences and address a set of interrelated questions: (1) the impact of strategic intellectual p

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Villegas, Kavanagh Leon Felipe. "The enterprise architecting framework applied to the supply organization of a sourcing management center of excellence." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44304.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2008.<br>Includes bibliographical references (p. 91-92).<br>The basis to develop this thesis was performed after executing an internship in ABB Inc. The main objective of the study was to design the organization to operate the procurement function at a new manufacturing campus.The enterprise architecting roadmap was applied to decompose the complex problem of design

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Mustafiz, Sadaf. "Dependability-oriented model-driven requirements engineering for reactive systems." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86598.

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Errors made during requirements development of dependable systems are very expensive to fix later in the lifecycle, and can result in minor to catastrophic failures. Discovering and documenting potential abnormal situations and irregular user behavior that can interrupt normal system interaction is of tremendous importance in the context of dependable systems development. Exceptions that are not identified during requirements elicitation might eventually lead to an incomplete system specification during analysis, and ultimately to an implementation that lacks certain functionality, or even beh

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Syriani, Eugene. "A multi-paradigm foundation for model transformation language engineering." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103550.

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Systems developed today are increasing in complexity. Model-Driven Engineering (MDE) attempts to solve the issues related to complexity through the use of models to describe systems at different levels of abstraction. Multi-Paradigm Modelling (MPM) promotes modelling all parts of the system, at the most appropriate level(s) of abstraction, using the most appropriate formalism(s), to reduce accidental complexity. MPM principles state that transformations too should be modelled explicitly. Model transformations are at the very heart of MDE. Transformations allow one to execute, analyse, synthesi

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Tang, Gary L. "Fuzzy inference systems for iris biometrics to reduce search time in large databases." Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/230.

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This research attempts to use a method that can reduce the search time of a system trying to match a user's iris image against those in a very large database. One method to reduce search time is to predict an individual's ethnicity and then only search iris templates belonging to that particular ethnicity in the database. By limiting the search to a small subsection of the database, as opposed to an exhaustive search, this method will cut significant run time from the search process. We propose the use of an adaptive neuro-fuzzy inference system to implement this idea. In addition to the adapt

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Yao, Hsin-Yun 1974. "Touch magnifying instrument applied to minimally invasive surgery." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81578.

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The MicroTactus is an instrument designed to detect signals arising from the interaction of a tip with soft or hard objects and to magnify them for haptic and auditory reproduction. An enhanced arthroscopic surgical probe was developed using an accelerometer and a custom-designed actuator for haptic feedback. Measurements were made to characterize the device and the results showed that numerous factors such as gripping method and gripping force influenced the system response in a complicated manner. The device was tested with the task of detecting surface defects of a cartilage-like mat

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Au, Pakwai. "Engineering functional blood vessels in vivo." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43867.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2008.<br>Includes bibliographical references.<br>At the present time, there are many hurdles to overcome in order to create a long-lasting and engineered tissue for tissue transplant in patients. The challenges include the isolation and expansion of appropriate cells, the arrangement of assorted cells into correct spatial organization, and the development of proper growth conditions. Furthermore, the creation of a three dimensional engineered tissue is limited by the fact that tissue assemblies greater than 100-200 microm

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Elisseeff, Jennifer Hartt 1973. "Transdermal photopolymerization of hydrogels for tissue engineering." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/84773.

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Von, Maltzahn Geoffrey. "A systems approach to engineering cancer nanotechnologies." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58387.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, February 2010.<br>Vita. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 203-210).<br>therapy. Over the past three decades, advances in nanomaterial synthesis have produced impressive nanostructures with unique electromagnetic and therapeutic properties. These represent a powerful toolkit of building blocks through which multi-component nanosystems could be constructed. Yet, while biological systems produce higher-order functions through coordinated interactions between multiple nanoscale c

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Feng, Huan. "Preparation of glass-ceramics largely using steelmaking slags and study on the effect of iron content on properties of glass-ceramics." Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/219.

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Glass-ceramics were prepared using steelmaking industry waste containing high iron content based on powder sintering and crystallization method. Anthracite was used in varying amounts as the reducing agent to recover iron in raw materials. X-ray diffraction analysis (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-ray spectrometer (EDX) were used to study the microstructure of glass-ceramics formed. Bending strength and micro-harness of the samples were compared. When 12g of anthracite was used, ionic iron (Fe 2+ /Fe

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Zhang, Yuntao. "Effect of calcium-silicon ratio on the expansion of mortar bars due to alkali-silica reaction." Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/222.

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In this experiment, mortar bars were prepared with three kinds of industrial solid waste and two kind of aggregates. Positive correlation between expansion induced by ASR and C/S ratio was obtained from the experiment result. Expansion of specimens prepared with standard sand and three cementitious materials increased with curing going on, and had expansion at the 14th day less than 0.1%. Expansion of mortar bars prepared with standard sand and cement increased in a linear way and the expansion at the 14th day was 0.195%. Expansion induced by ASR doesn't exhibit a positive correlation with C/S

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Zhu, Ting F. (Ting Fredrick). "Engineering artificial cell membranes by Ting F. Zhu." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/58299.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Growth and division are essential biological processes of cellular life. A crucial question concerning the origin of cellular life is how primitive cells (protocells) lacking complex biological machinery could grow and divide. To address this question, we first developed an effective method for preparing large monodisperse (uniform-sized) vesicles through a combination of extrusion and large-pore dialysis. The development of this pre

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Tam, Joshua. "Adipogenesis and angiogenesis : roles in tissue engineering and glucose metabolism." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54590.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 118-127).<br>Adipose tissue serves two main functions in the body: (1) it is the body's primary energy depot; and (2) it also serves as an important endocrine organ, producing and secreting various enzymes, growth factors, cytokines, and hormones. Both of these functions require ample access to circulating blood. Many aspects of angiogenesis during adipose tissue expansion remain poorly understood. Adipocytes produce a large variety

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Kearney, Cathal (Cathal John). "Non-invasive shock wave stimulated periosteum for bone tissue engineering." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/63082.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 211-225).<br>The cambium cells of the periosteum, which are known osteoprogenitor cells, have limited suitability for clinical applications of bone tissue engineering due to their low cell number (2-5 cells thick). Extracorporeal shock waves (ESWs) have been reported to cause thickening of the cambium layer and subsequent periosteal osteogenesis. This work proposes that ESW-therapy can be used as a non-invasive, inexpensive, and rapi

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Van, Hoosear Christopher A. "Surface hardness classification via unmanned aerial vehicles gripper finger deflection." Scholarly Commons, 2013. https://scholarlycommons.pacific.edu/uop_etds/231.

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The purpose of this thesis is to ascertain the feasibility of using strain gauges attached to a Unmanned Aerial Vehicle (UAV) gripper to determine, upon impact, the hardness of a landing site. We design and fabricate a four finger gripper that uses a rotary component to convert the rotational motion of a servo to the linear motion of the finger assemblies. We functionally test a gripper prototype made from rapid-prototype material. We conduct three experiments to test the gripper's functionality. The first experiment tests the gripper's ability to grasp, lift, and release a centered payload, a

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Ma, Haoyuan. "Study on preparation of high performance CaO-MgO-Al2O3-SiO2 system glass-ceramic with industrial by-products." Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/221.

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Blast furnace slag (BFS), iron ore tailings (IOT), and coal fly ash (CFA) are common industrial by-products with huge annual yield and low reuse rate (< 30%). This research was intended to prepare high performance glass-ceramics from these three industrial by-products. What's more, two energy saving methods were put forward. One was application of single-stage heat treatment, another was mixing cold solid raw material (IOT, CFA) with melted BFS discharged at 1500 in iron making process instead of mixing all the raw material in room temperature and then heating them to melt. Different binary ba

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Fuentes, Jose L. S. M. Massachusetts Institute of Technology. "Commercial Aircraft Corporation of China (Comac) attempts to break the Airbus-Boeing duopoly, will it succeed? : an industry analysis framework applied." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/70829.

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Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2011.<br>Page 88 blank. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 82-87).<br>Using an industry analysis framework, this thesis analyzes whether the recently established Commercial Aircraft Corporation of China (Comac) is likely to break the Boeing-Airbus duopoly in the industry of large commercial airplanes. The selected framework for this thesis is comprised by the following two principles: 1) "The nature

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Wolfson, Avidon M. "Technological innovation, venture formation and resource allocation : the impact of economic downturn on life sciences venture capital and start-ups." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59777.

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Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 70-73).<br>The Massachusetts life sciences supercluster is a source of tremendous innovation. The Commonwealth's academic and industrial institutions produce a consistent stream of cutting-edge scientific research and the region has a well-developed professional and financial infrastructure to support the translation of these ideas into useful products. Venture capital (VC) plays a particularly imp

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Alterovitz, Gil 1975. "A Bayesian framework for statistical signal processing and knowledge discovery in proteomic engineering." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34479.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, February 2006.<br>Includes bibliographical references (leaves 73-85).<br>Proteomics has been revolutionized in the last couple of years through integration of new mass spectrometry technologies such as -Enhanced Laser Desorption/Ionization (SELDI) mass spectrometry. As data is generated in an increasingly rapid and automated manner, novel and application-specific computational methods will be needed to deal with all of this information. This work seeks to develop a Bayesian framework in mass-based proteomics for protein i

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Chen, Patty P. 1981. "Lung tissue engineering : in vitro synthesis of lung tissue from neonatal and fetal rat lung cells cultured in a three-dimensional collagen matrix." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28758.

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Thesis (M. Eng.)--Harvard-MIT Division of Health Sciences and Technology, 2004.<br>Includes bibliographical references (p. 76-77).<br>The focus of this study was to investigate the histology of tissue formed when fetal (16-20 days gestation) and neonatal (2 days old) rat lung cells were grown in a collagen-glycosaminoglycan scaffold. This project employed a collagen-GAG scaffold specifically developed for tissue engineering and investigated the effect of this substratum on the formation of lung histotypic structures in vitro. A cell isolation procedure was developed whereby 19-days gestation t

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Siameh, Theophilus. "Graph Analytics Methods In Feature Engineering." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etd/3307.

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High-dimensional data sets can be difficult to visualize and analyze, while data in low-dimensional space tend to be more accessible. In order to aid visualization of the underlying structure of a dataset, the dimension of the dataset is reduced. The simplest approach to accomplish this task of dimensionality reduction is by a random projection of the data. Even though this approach allows some degree of visualization of the underlying structure, it is possible to lose more interesting underlying structure within the data. In order to address this concern, various supervised and unsupervised l

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"Endogenous Sparse Recovery." Thesis, 2012. http://hdl.handle.net/1911/70235.

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Sparsity has proven to be an essential ingredient in the development of efficient solutions to a number of problems in signal processing and machine learning. In all of these settings, sparse recovery methods are employed to recover signals that admit sparse representations in a pre-specified basis. Recently, sparse recovery methods have been employed in an entirely new way; instead of finding a sparse representation of a signal in a fixed basis, a sparse representation is formed "from within" the data. In this thesis, we study the utility of this endogenous sparse recovery procedure for learn

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"An asymptotic minimax analysis of nonlocal means on edges." Thesis, 2012. http://hdl.handle.net/1911/70368.

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This thesis analyzes the non-local means denoising algorithm using the criterion of minimax optimality from statistical decision theory. We show that nonlocal means is minimax suboptimal on images with smooth discontinuities [1] with a rate of convergence of [Special characters omitted.] ( n -1 ) comparable to that of wavelet thresholding. The suboptimality is a consequence of the isotropic nature of the algorithm, and its inability to adapt to the smoothness of the discontinuity. However, all is not lost for nonlocal methods. We also propose an anisotropic nonlocal means algorithm [2] that ca

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"Accelerated Discontinuous Galerkin Solvers with the Chebyshev Iterative Method on the Graphics Processing Unit." Thesis, 2011. http://hdl.handle.net/1911/70478.

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This work demonstrates implementations of the discontinuous Galerkin (DG) method on graphics processing units (GPU), which deliver improved computational time compared to the conventional central processing unit (CPU). The linear system developed when applying the DG method to an elliptic problem is solved using the GPU. The conjugate gradient (CG) method and the Chebyshev iterative method are the linear system solvers that are compared, to see which is more efficient when computing with the CPU's parallel architecture. When applying both methods, computational times decreased for large proble

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"Engineering the Production of Itaconic Acid in Escherichia coli." Thesis, 2011. http://hdl.handle.net/1911/70322.

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Itaconic acid (IA) has many versatile applications in science and medicine. Engineering Escherichia coli can provide a reliable route for IA production, where cis -aconitate decarboxylase (CAD) is one essential enzyme in the process. The synthetic cad gene has been cloned into various vectors to improve the expression rate and folding activities. The strain bearing plasmid pTrc99a- cad displays a significant amount of IA production, while the CAD protein expressed from the same plasmid displays the highest enzymatic activity in vitro. To improve the reliability of forming the cis -aconitate in

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"Multi-Failure Mode Risk Assessment of the Houston/Galveston Bridge System to Hurricane Threats." Thesis, 2012. http://hdl.handle.net/1911/70204.

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This research implements the first Houston/Galveston area hurricane risk assessment of bridges for multiple failure modes: bridge deck uplift and bridge scour. Due to recent hurricane damage of bridges, emergency managers need to understand the potential state of the bridge network immediately following a storm for effective mitigation and post-event planning. To that end, this study builds a new database of bridge information necessary for vulnerability modeling, adapts current deterministic models of bridge deck uplift and scour for a probabilistic framework and expands the scour models to i

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"High Performance Reliable Variable Latency Carry Select Addition." Thesis, 2012. http://hdl.handle.net/1911/70231.

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This thesis describes the design and the optimization of a low overhead, high performance variable latency carry select adder. Previous researchers believed that the traditional adder has reached the theoretical speed bound. However, a considerable portion of hardware resources of the traditional adder is only used in the worst case. Based on this observation, variable latency adders have been proposed to improve on the theoretical limit, but such adders incur significant area overhead. By combining previous variable latency adders with carry select addition, this work describes a novel variab

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"Space--Time Finite Element Computation of the Aerodynamics of Flapping Wings." Thesis, 2011. http://hdl.handle.net/1911/70259.

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The details of the aerodynamics of flapping flight continue to pose a considerable challenge to a complete understanding of flight. Advanced computational fluid mechanics technology coupled with experimental data offers a unique perspective into these aerodynamics. The difficulty of computing such complex aerodynamics is mostly related to the presence of moving and deforming solid surfaces. The finite element method with the Deforming-Spatial-Domain/Stabilized Space-Time (DSD/SST) formulation, which was developed by the Team for Advanced Flow Simulation and Modeling for the computation of flow

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"Influence of Effective Modulus on Period-Doubling Bifurcation in Atomic Force Microscopy: Investigation and Implementation for Sample Characterization." Thesis, 2011. http://hdl.handle.net/1911/70268.

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Atomic force microscope (AFM) is an important tool for measuring the topographical and other properties of a sample with nanometer resolution. The cantilever probe of the AFM is influenced by nonlinear interaction forces which act between the probe and the sample. For certain non-standard excitation conditions, this can result in bifurcations in the probe's response. This work numerically examines a period-doubling bifurcation observed to occur for interactions with soft materials. The influence of the sample properties and other conditions on the bifurcation is studied and a method is propose

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"Developing a Radar-based Flood Alert System For Sugar Land, Texas." Thesis, 2011. http://hdl.handle.net/1911/70283.

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This thesis presents a framework for a radar-based flood alert system (FAS) for the Oyster Creek Watershed to aid the City of Sugar Land in flood forecasting. The motivation for using this particular system stems from a radar's ability to provide flood warning lead-time when calibrated with available gauge information. This study follows a typical workflow in analyzing watersheds, which involves converting excess rainfall to runoff, then converting the resulting flow rates to polygons that show water levels. This thesis also introduces the Flood Warning Indicator (FWI) as a component of Sugar

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46

"Efficient Radiometric Signature Methods for Cognitive Radio Devices." Thesis, 2011. http://hdl.handle.net/1911/70296.

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This thesis presents the first comprehensive study and new methods for radiometric fingerprinting of the Cognitive Radio (CR) devices. The scope of the currently available radio identification techniques is limited to a single radio adjustment. Yet, the variable nature of the CR with multiple levels of parameters and adjustments renders the radiometric fingerprinting much more complex. We introduce a new method for radiometric fingerprinting that detects the unique variations in the hardware of the reconfigurable radio by passively monitoring the radio packets. Several individual identifiers a

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"Experimental results and three-dimensional simulations of instabilities in a rotating lid-driven cylinder." Thesis, 2012. http://hdl.handle.net/1911/70299.

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An experimental setup for a rotating lid-driven cylinder problem is designed and constructed in the context of modeling bulk semiconductor crystal growth techniques. Details concerning construction of the experimental setup are included in the interest of reproducibility. Ultrasonic Doppler Velocimetry (UDV) is tested as a viable visualization technique for the lid-driven cylinder and experimental measurements of the flow field are compared to numerical simulations. The aspect ratio of the cylinder and the Reynolds number are the governing parameters for the problem. Experimental and computati

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"Topological optimization of nanofiber placement in a continuum." Thesis, 2012. http://hdl.handle.net/1911/70315.

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The structural integrity and/or electrical or thermal conductivity of a component can be improved with the optimal topological placement of very high strength or very high conductivity nanofibers. This thesis presents a heuristic procedure for the estimation of the optimal location for the nanofibers based on topological optimization concepts. Previously established topological procedures for continuum-only structures and for truss-only systems are reviewed. Then, this new hybrid approach, which utilizes the continuum model as a retained ground structure, and truss structure for nanofibers, is

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"Thermodynamics of confined colloid-polymer mixtures." Thesis, 2012. http://hdl.handle.net/1911/70329.

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Recent advances have elucidated the behavior of colloids and polymer systems in the archety pal three dimensions. However, these systems are ill-understood when confined to two dimensions. Using experimental techniques such as Langmuir-Blodgett and ellipsometry, we attempt to explain the behavior of two dimensional colloid/polymer systems via micron-scale imaging as well as measuring their surface-pressure versus area isotherms. Possible phase transition behaviors and mechanisms are uncovered and discussed. We explore the importance of proper colloidal stabilizing ligands in terms of hydrophob

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"Impact of Surface Topography on Colloidal and Bacterial Adhesion." Thesis, 2011. http://hdl.handle.net/1911/70335.

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Although the importance of substrate surface topography in colloidal and bacterial adhesion is widely recognized, how it affects the adhesion process has been a controversial topic. In this study, the impact of surface topography on adhesion of biological (i.e., bacteria) and non-biological colloids was investigated using natural and engineered surfaces with well-defined surface topographic patterns. Adhesion experiments using carboxylate modified latex (CML) microspheres of 4μm in diameter and Psudomonas Aeruginosa on the taro leaf of Colocasia esculenta, a plant known for its self-cleaning p

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