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Dissertations / Theses on the topic 'Sensors and actuators placement'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Szczepanski, Robert Walter. "Optimal placement of actuators and sensors for vibration control using genetic algorithms." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341754.

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2

Potami, Raffaele. "Optimal sensor/actuator placement and switching schemes for control of flexible structures." Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-042808-124333/.

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Dissertation (Ph.D.)--Worcester Polytechnic Institute.<br>Keywords: hybrid system, PZT actuators, performance enchancement, actuator placement, actuator switching. Includes bibliographical references (leaves 102-108).

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3

Polyzos, Dimitrios. ""Measuring System Properties & Structured Diagnostics for the Selection of Sensors, Actuators Placement & Eigenstructure Assignment"." Thesis, City University London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.524712.

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4

Suwit, Pulthasthan Information Technology &amp Electrical Engineering Australian Defence Force Academy UNSW. "Optimal placement of sensor and actuator for sound-structure interaction system." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Information Technology and Electrical Engineering, 2006. http://handle.unsw.edu.au/1959.4/38741.

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This thesis presents the practical and novel work in the area of optimal placement of actuators and sensors for sound-structure interaction systems. The work has been done by the author during his PhD candidature. The research is concentrated in systems with non-ideal boundary conditions as in the case in practical engineering applications. An experimental acoustic cavity with five walls of timber and a thin aluminium sheet fixed tightly on the cavity mouth is chosen in this thesis as a good representation of general sound-structure interaction systems. The sheet is intentionally so fixed that

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5

Jha, Akhilesh K. "Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28243.

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Inflatable structures have been a subject of renewed interest in recent years for space applications such as communication antennas, solar thermal propulsion, and entry/landing systems. This is because inflatable structures are very lightweight and on-orbit deployable. In addition, they have high strength-to-mass ratio and require minimal stowage volume, which makes them especially suitable for cost-effective large space structures. An inflated toroidal structure (torus) is often used there in order to provide structural support. For these structures to be effective, their vibration must be co

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6

MURUGAN, JAYA MAHESH. "Vibration monitoring and control of industrial structures." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2858351.

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7

Brakna, Mohammed. "Sensor and actuator optimal location for dynamic controller design. Application to active vibration reduction in a galvanizing process." Electronic Thesis or Diss., Université de Lorraine, 2023. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2023_0152_BRAKNA.pdf.

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Les objectifs de cette thèse sont de déterminer un modèle à la fois suffisamment précis mais numériquement exploitable pour proposer des méthodologies de placement de capteurs et d'actionneurs pour le contrôle actif de vibration dans une ligne de galvanisation. La galvanisation consiste à recouvrir un métal (dans notre étude : de l'acier) par une couche protectrice de zinc qui évite la corrosion due à l'air. L'épaisseur de cette couche doit être constante pour garantir les propriétés mécaniques et l'état de surface du produit. Dans une ligne de galvanisation, la bande d'acier en mouvement est

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8

Perini, Efrain Araujo [UNESP]. "Redução de vibrações de rotores utilizando atuadores magnéticos e sistema de controle feedforward." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/94510.

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Made available in DSpace on 2014-06-11T19:27:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-08-14Bitstream added on 2014-06-13T18:31:06Z : No. of bitstreams: 1 perini_ea_me_ilha.pdf: 25219962 bytes, checksum: af8e5bb5738ecda8c45a59f9677a5507 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Este trabalho apresenta o desenvolvimento de uma análise teórica do desempenho de um sistema de controle ativo utilizando mancais magnéticos como atuadores de não-contato para a redução de vibrações em rotores. São analisados três modelos de rotores, sendo que em um dele

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9

Perini, Efrain Araujo. "Redução de vibrações de rotores utilizando atuadores magnéticos e sistema de controle feedforward /." Ilha Solteira : [s.n.], 2009. http://hdl.handle.net/11449/94510.

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Resumo: Este trabalho apresenta o desenvolvimento de uma análise teórica do desempenho de um sistema de controle ativo utilizando mancais magnéticos como atuadores de não-contato para a redução de vibrações em rotores. São analisados três modelos de rotores, sendo que em um deles aplica-se apenas o controle feedback e os outros são suportados apenas por mancais magnéticos, os quais também são os atuadores do controlador. Assim, Luna arquitetura de controle tipo feedforward é empregada sobreposta ao sistema de controle feedback dos atuadores nestes dois modelos, sendo urna análise realizada em

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10

Mitwalli, Ahmed Hamdi. "Polymer gel actuators and sensors." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9969.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.<br>Includes bibliographical references (p. [351]-361).<br>by Ahmed Hamdi Mitwalli.<br>Sc.D.

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11

Scheidl, Rudolf. "Actuators and Sensors for Smart Systems." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200616.

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Smartness of technical systems relies also on appropriate actuators and sensors. Different to the prevalent definition of smartness to be embedded machine intelligence, in this paper elegance and simplicity of solutions is postulated be a more uniform and useful characterization. This is discussed in view of the current trends towards cyber physical systems and the role of components and subsystems, as well as of models for their effective realization. Current research on actuators and sensing in the fluid power area has some emphasis on simplicity and elegance of solution concepts and sophist

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12

MOHAMED, MOHAMED ELSAID ELKHAYAT MOATAZBELLAH. "Interface Circuits for Sensors and Actuators." Doctoral thesis, Università degli studi di Pavia, 2018. http://hdl.handle.net/11571/1214860.

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The research activity described in this Thesis is the result of three different projects, all dealing with interface circuits for sensors and actuators. 1) Capacitive Humidity sensor with temperature controller and heater integrated in CMOS technology The first project deals with the design of the integrated interface circuit for accurately controlling the temperature of a CMOS capacitive humidity sensor, with the final goal of allowing self-dignostics and self-calibration of the sensor. The humidity sensor used is equipped with an integrated resistor and a temperature sensor which allow chang

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13

Johnson, David Gary. "Integrating sensors and actuators for robotic assembly." Thesis, University of Hull, 1986. http://hydra.hull.ac.uk/resources/hull:11276.

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This thesis addresses the problem of integrating sensors and actuators for closed-loop control of a robotic assembly cell. In addition to the problems of interfacing the physical components of the work-cell, the difficulties of representing sensory feedback at a high level within the robot control program are investigated. A new level of robot programming, called sensor-level programming, is introduced. In this, the movements of the actuators are not given explicitly, but rather are inferred by the programming system to achieve new sensor conditions given by the programmer. Control of each sen

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14

Dogramadzi, Sanja. "Sensors and actuators in computer controlled colonoscopy." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369813.

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15

Melin, Oscar, and Matilda Asperot. "Guidelines for placement of sensors : Placement of sensors in public areaswhile consideringcoverage, cost, and performance." Thesis, Jönköping University, JTH, Avdelningen för datavetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-54034.

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With the spread of COVID-19, occupancy estimation wason the rise to regulatepeople’smovement in public areasto further decrease the spreadof the diseaseand prepare for future pandemics.Much theory existson the problem of sensor placement, but this theory is mainly treated as a mathematical problem and often not applicable to real-life situationsdue to important real-life factors not being considered. Placing sensors is adifficult task,and it is hard knowingwhere to beginplacing themand what type of sensors to use. The purpose of thisthesis was to help with the problem onplacing sensors by inve

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16

Ehresman, Jonathan David. "Integration of actuators and sensors into composite structures." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/ehresman/EhresmanJ0809.pdf.

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The need for more efficient wind turbine blades is growing in our society. One step in accomplishing this task would be to make wind turbines blades into smart structures. A smart structure is one that incorporates sensors, complete control systems, and active control devices, in order to shed, or redistribute the load placed on the structure. For wind turbine blades this means changing the shape of the blade profile as it encounters different wind conditions. In order to have active control surfaces functioning on wind turbine blades, the existing blades would have to be retrofitted, and the

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17

Song, Changsik. "Design and synthesis of molecular actuators and sensors." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41554.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 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.<br>To date, the most successful conducting polymer actuators are based on polypyrrole, which operates through incorporating and expelling counterions and solvent molecules to balance the charges generated by electrochemical stimuli (swelling mechanism). Although significant progress has been made, there still exists a need for

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18

Yun, Yeoheung. "Nanotube Sensors and Actuators in Mechanics and Medicine." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1150836513.

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19

Aphanuphong, Sutha. "Embedded heaters and sensors for micro SMA actuators." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1458441.

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20

Anderson, Eric H. (Eric Harold). "Robust placement of actuators and dampers for structural control." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12209.

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21

Geykhman, Roman. "Optimal placement of binary actuators in deformable optical systems." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67794.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 111-113).<br>Recently, exploration has been conducted into the applicability of binary mechatronics to active figure correction in large optical systems such as space telescopes and ground-based solar-thermal concentrators. This Thesis will continue this exploration. The information-theoretic requirements of the corrective commands required in active optics will be explored to understand the dimensionality of the contin

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22

Rostain, William. "Engineering of RNA sensors and actuators in living cells." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/95177/.

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The aim of synthetic biology is to create a new discipline of engineering based on biological parts, devices and systems. The availability of predictable, programmable tools to sense and to control gene expression is central to our ability to engineer such systems. Ribonucleic acid (RNA) is an attractive building material to create such programmable tools, as RNA-RNA interactions are predictable and RNA secondary structure prediction software has been developed. Design rules for creating such parts using RNA can be established, based on a standardised approach or on structural design rules int

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23

Sareen, Harpreet. "Cyborg botany : augmented plants as sensors, displays and actuators." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114063.

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Thesis: S.M., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 94-98).<br>Plants are photosynthetic eukaryotes with a billion years of evolutionary history. While primarily sessile, they have developed distinctive abilities to adapt to the environment. They are self-powered, self-fabricating, self-regenerating and active signal networks. They carry highly advanced systems to sense and respond to the environment. We strive for such sensing a

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24

Kabeya, Kazuhisa III. "Structural Health Monitoring Using Multiple Piezoelectric Sensors and Actuators." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36709.

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A piezoelectric impedance-based structural health monitoring technique was developed at the Center for Intelligent Material Systems and Structures. It has been successfully implemented on several complex structures to detect incipient-type damage such as small cracks or loose connections. However, there are still some problems to be solved before full scale development and commercialization can take place. These include: i) the damage assessment is influenced by ambient temperature change; ii) the sensing area is small; and iii) the ability to identify the damage location is poor. The obje

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25

Lloyd, Justin Michael. "Electrical Properties of Macro-Fiber Composite Actuators and Sensors." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/10013.

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Piezoceramic fiber composite (PFC) actuators and sensors offer many advantages over conventional monolithic piezoceramic devices. Conformable, durable and, when equipped with interdigitated electrodes (IDEs), more responsive than regular monolithic devices, PFCs promise to revolutionize the application of piezoelectric materials. Developed by the NASA-Langley Research Center, the Macro-Fiber Composite (MFC) actuator and sensor is the most sophisticated PFC device yet invented. With superior qualities among PFCs in performance, behavior repeatability and manufacturability, the MFC has spawned g

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26

Kostner, Stefan [Verfasser]. "Sensors and Actuators for Single Particles and Cells / Stefan Kostner." Aachen : Shaker, 2010. http://d-nb.info/1124365214/34.

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27

Savran, Cagri Abdullah 1976. "Broadband active structural control using collocated piezoelectric sensors and actuators." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/89278.

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28

McCain, Amy Jean. "Shaped actuators and sensors for local control of intelligent structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/46445.

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29

Yung, Jeremy Hoyt 1971. "Compensation methodologies for local control using strain actuators and sensors." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10627.

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30

Kar, S. B. "Studies on electromechanical sensors and actuators based on conducting polymers." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2005. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2488.

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31

Schäfer, Carsten [Verfasser]. "Optimization approaches for actuator and sensor placement and its application to model predictive control of dynamical systems / Carsten Schäfer." München : Verlag Dr. Hut, 2015. http://d-nb.info/1079768459/34.

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32

Cormier, Roger. "Isolation of concurrent faults in sensors and actuators in control systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/NQ46290.pdf.

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33

Tamirisa, Prabhakar A. "Plasma polymerized hydrogel thin films for applications in sensors and actuators." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/19827.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2007.<br>Committee Chair: Hess, Dennis W.; Committee Member: Henderson, Cliff L.; Committee Member: Hunt, William D.; Committee Member: Meredith, J. Carson; Committee Member: Prausnitz, Mark R.

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34

Sivakumar, Kousik. "Nanowire sensor and actuator." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 5.53 Mb., 108 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1435931.

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35

Ferrell, Cynthia. "Robust Agent Control of an Autonomous Robot with Many Sensors and Actuators." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/6791.

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This thesis presents methods for implementing robust hexpod locomotion on an autonomous robot with many sensors and actuators. The controller is based on the Subsumption Architecture and is fully distributed over approximately 1500 simple, concurrent processes. The robot, Hannibal, weighs approximately 6 pounds and is equipped with over 100 physical sensors, 19 degrees of freedom, and 8 on board computers. We investigate the following topics in depth: distributed control of a complex robot, insect-inspired locomotion control for gait generation and rough terrain mobility, and fau

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36

Obal, Michael Walter. "Vibration control of flexible structures using piezoelectric devices as sensors and actuators." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/12025.

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37

Daraji, Ali Hossain Alewai. "Active vibration control of flexible structures by optimally placed sensors and actuators." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2484.

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The active vibration reduction of plane and stiffened plates was investigated using a genetic algorithm based on finite element modelling to optimise the location of sensors and actuators. The main aspects of this work were:  Development of a finite element model for a plate stiffened by beams with discrete sensors and actuators bonded to its surface.  Development of a finite element program for steel plates with various symmetrical and asymmetrical stiffening and edge conditions.  Development of a genetic algorithm program based on the finite element modelling for the optimisation of the l

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38

Huang, Wei-Ping. "Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors." ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/967.

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This thesis investigates Quasilinear Control (QLC) of time-delay systems with nonlinear actuators and sensors and analyzes the accuracy of stochastic linearization for these systems. QLC leverages the method of stochastic linearization to replace each nonlinearity with an equivalent gain, which is obtained by solving a transcendental equation. The idea of QLC is to stochastically linearize the system in order to analyze and design controllers using classical linear control theory. In this thesis, the existence of the equivalent gain for a closed-loop time-delay system is discussed. To compute

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39

Wei, Yu Zhang. "Design and development of new micro-force sensors." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691170.

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40

Sankar, Sandhya. "INTELLIGENT PLACEMENT OF METERS/SENSORS FOR SHIPBOARD POWER SYSTEM ANALYSIS." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-09102007-140439/.

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Real time monitoring of the shipboard power system is a complex task to address. Unlike the terrestrial power system, the shipboard power system is a comparatively smaller system but with more complexity in terms of its system operation. This requires the power system to be continuously monitored to detect any type of fluctuations or disturbances. Planning metering systems in the power system of a ship is a challenging task not only due to the dimensionality of the problem, but also due to the need for reducing redundancy while improving network observability and efficient data collection for

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41

Swathanthira, Kumar Murali Murugavel Manjakkattuvalasu. "Implementation of an actuator placement, switching algorithm for active vibration control in flexible structures." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-1120102-210634.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: Actuator placement algorithm; piezoelectric actuators; LQR; Galerkin; supervisory control; active vibration control; FEA; switching policy; dSPACE. Includes bibliographical references (p. 58-64).

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42

Mewer, Richard C. "Analysis and Structural Health Monitoring of Composite Plates with Piezoelectric Sensors and Actuators." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/MewerRC2003.pdf.

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43

Newman, Scott M. "Active damping control of a flexible space structure using piezoelectric sensors and actuators." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23517.

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Approved for public release; distribution is unlimited<br>This thesis details the experimental analysis of an active damping control technique applied to the Naval Postgraduate School's Flexible Spacecraft Simulator using piezoceramic sensors and actuators. The mass property of the flexible arm is varied to study the frequency effects on the Positive Position Feedback (PPF) algorithm. Multi-modal dynamics response is analytically studied using a finite-element model of a cantilevered beam while under the influence of three different control laws: a basic law derived rom the Lyapunov Stabili

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44

Raykar, Vikas Chandrakant. "Position calibration of acoustic sensors and actuators on distributed general purpose computing platforms." College Park, Md. : University of Maryland, 2003. http://hdl.handle.net/1903/39.

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Thesis (M.S.) -- University of Maryland, College Park, 2003.<br>Thesis research directed by: Dept. of Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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45

Treanor, Kirk E. "Performance and optimal placement of piezoceramic actuators for shape control of a cantilever beam." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA316163.

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46

Gottfarb, Bart Samuel. "Optimal placement of plasma actuators on trucks : A drag reduction study using adjoint methods." Thesis, KTH, Aeroakustik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203346.

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The fuel consumption of vehicles plays an important environmental role and ways of improving the fuel economy is beneﬁcial for a sustainable future. Active ﬂow control is one method that can potentially reduce the aerodynamic drag signiﬁcantly and therefore the fuel consumption. A plasma actuator introduces momentum in its vicinity and can be used for active control of the ﬂow. This thesis aimed to ﬁnd the optimal placement of plasma actuators on the A-pillars of a truck, using Reynolds-Averaged Navier-Stokes (RANS) simulations performed with STAR-CCM+. The adjoint solver was used to obtain a

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47

Tiberg, Jesper. "An evaluation of algorithms for real-time strategic placement of sensors." Thesis, University of Skövde, School of Humanities and Informatics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-865.

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<p>In this work an investigation is performed in whether the algorithms Simultaneous Perturbation Stochastic Approximation (SPSA) and Virtual Force Algorithm (VFA) are suitable for real-time strategic placement of sensors in a dynamic environment. An evaluation of these algorithms is conducted and compared to Simulated Annealing (SA), which has been used before in similar applications.</p><p>For the tests, a computer based model of the sensors and the environment in which they are used, is implemented. The model handles sensors, moving objects, specifications for the area the sensors are suppo

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48

Hixenbaugh, Franklin D. "A study on piezoelectric actuators and sensors for vibration control of flexible space structures." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA274925.

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Thesis (M.S. in Systems Technology (Space Systems Operations)) Naval Postgraduate School, September 1993.<br>Thesis advisor(s): Brij N. Agrawal. "September 1993." Includes bibliographical references. Also available online.

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49

Miller, Duncan Lee. "Development of resource-constrained sensors and actuators for in-space satellite docking and servicing." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98697.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 171-177).<br>Most satellites on-orbit today are not intended to physically approach or interact with other spacecraft. However, the robotic servicing of orbiting assets will be an economically desirable (and often scientifically necessary) capability in future space enterprises. With the right set of tools and technologies, satellites will be able to autonomously refuel, repair, or replace each other. This

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50

SADLER, DANIEL J. "DEVELOPMENT OF A NEW MAGNETIC INERCONNECTION TECHNOLOGY FOR MAGNETIC MEMS DEVICE APPLICATIONS." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin983800458.

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