Дисертації з теми "Digital power systems"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Digital power systems".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Grimes, Todd S. "Adaptive Power Analog-to-Digital Interface for Digital Systems." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1483366560887816.
Повний текст джерелаChoi, Kyu-Won. "Hierarchical power optimization for ultra low-power digital systems." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180111/unrestricted/choi%5Fkyu-won%5F200312%5Fphd.pdf.
Повний текст джерелаLuo, F. L. "Digital control of power semiconductor converters." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383314.
Повний текст джерелаSchmitt, Andreas Joachim. "Digital Implementation of Power System Metering and Protection." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51194.
Повний текст джерелаMaster of Science
Gubba, Ravikumar Krishnanjan. "Distributed simulation of power systems using real time digital simulator." Master's thesis, Mississippi State : Mississippi State University, 2009. http://library.msstate.edu/etd/show.asp?etd=etd-06152009-222641.
Повний текст джерелаLlanos, Roger Vicente Caputo. "Voltage scaling interfaces for multi-voltage digital systems." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/159617.
Повний текст джерелаMultiple Voltage Digital Systems exploit the concept of voltage scaling by applying different supplies to particular regions of the chip. Each of those regions belongs to a power domain and may have two or more supply voltage configurations. Regardless of distinct energy levels on different power domains, the blocks shall process signals with coherent logic levels. In these systems, the Level Shifters (LS) are essential components that act as voltage scaling interfaces between power domains, guaranteeing the correct signal transmission. With the appropriate voltage scaling interface and its proper implementation, we can avoid excessive static and dynamic power consumption. Therefore, the design and implementation of level shifters should be a conscientious process and must guarantee the lowest overhead in size, energy consumption, and delay time. In this work, we study the main characteristics of voltage scaling interfaces and introduce an energy-efficient level shifter with reduced area, and suitable for low-to-high level conversion. We present the level shifters with the best performance that we found in the literature and categorize them into two main groups: Dual-rail and Single-rail, according to the number of power rails required. The proposed circuit was compared to the traditional topology of each group, Differential Cascode Voltage Switch (DCVS) and Puri’s level shifter respectively. Simulations on an IBMTM 130nm CMOS technology show that the proposed topology requires up to 93.79% less energy under certain conditions. It presented 88.03% smaller delay and 39.6% less Power-Delay Product (PDP) when compared to the DCVS topology. In contrast with the Puri’s level shifter, we obtained a reduction of 32.08% in power consumption, 13.26% smaller delay and 15.37% lower PDP. Besides, our level shifter was the only one capable of working at 35% of the nominal supply voltage.
Li, Yan Ph D. Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science. "Digital assistance design for analog systems : digital baseband for outphasing power amplifiers." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82353.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 145-150).
Digital assistance is among many aspects that can be leveraged to help analog/mixed-signal designers keep up with the technology scaling. It usually takes the form of predistorter or compensator in an analog/mixed-signal system and helps compensate the nonidealities in the system. Digital assistance takes advantage of the process scaling with faster speed and a higher level of integration. When a digital system is co-optimized with system modeling techniques, digital assistance usually becomes a key enabling block for the high performance of the overall system. This thesis presents the design of digital assistances through the digital baseband design for outphasing power amplifiers. In the digital baseband design, this thesis conveys two major points: the importance of the use of the reduced-complexity system modeling techniques, and the communications between hardware design and system modeling. These points greatly help the success in the design of the energy-efficient baseband. The first part of the baseband design is to realize the nonlinear signal processing unit required by the modulation scheme. Conventional approaches of implementing this functionality do not scale well to meet the throughput, area and energy-efficiency targets. We propose a novel fixed-point piece-wise linear approximation technique for the nonlinear function computations involved in the signal processing unit. The new technique allows us to achieve an energy and area-efficient design with a throughput of 3.4Gsamples/s. Compared to the projected previous designs, our design shows 2x improvement in energy-efficiency and 25x in area-efficiency. The second part of the baseband design devotes to the nonlinear compensator design, aiming to improve the linearity performance of the outphasing power amplifier. We first explore the feasibility of a working compensator by use of an off-line iterative solving scheme. With the confirmation that a compensator does exist, we analyze the structure of the nonlinear baseband-equivalent PA system and create a dynamical real-time compensator model. The resulting compensator provides the overall PA system with around 10dB improvement in ACPR and up to 2.5% in EVM.
by Yan Li.
Ph.D.
Celanovic, Ivan. "A Distributed Digital Control Architecture for Power Electronics Systems." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34998.
Повний текст джерелаMaster of Science
Al-doori, Q. "Design of a smart power manager for digital communication systems." Thesis, University of Salford, 2017. http://usir.salford.ac.uk/43361/.
Повний текст джерелаHenry, Michael Brewer. "Power Reduction of Digital Signal Processing Systems using Subthreshold Operation." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33691.
Повний текст джерелаOver the past couple decades, the capabilities of battery-powered electronics has expanded dramatically. What started out as large bulky 2-way radios, wristwatches, and simple pacemakers, has evolved into pocket sized smart-phones, digital cameras, person digital assistants, and implantable biomedical chips that can restore hearing and prevent heart attacks. With this increase in complexity comes an increase in the amount of processing, which runs on a limited energy source such as a battery or scavenged energy. It is therefore desirable to make the hardware as energy efficient as possible. Many battery-powered systems require digital signal processing, which often makes up a large portion of the total energy consumption. The digital signal processing of a battery-powered system is therefore a good target for power reduction techniques. One method of reducing the power consumption of digital signal processing is to operate the circuit in the subthreshold region, where the supply voltage is lower than the threshold voltage of the transistors. Subthreshold operation greatly reduces the power and energy consumption, but also decreases the maximum operating frequency. Many digital signal processing applications have real-time throughput requirements, so various architectural level techniques, such as pipelining and parallelism, must be used in order to achieve the required performance.
This thesis investigates the use of parallelization and subthreshold operation to lower the power consumption of digital signal processing applications, while still meeting throughput requirements. Using an off the shelf fast fourier transform architecture, it will be shown that through parallelization and subthreshold operation, a 70 \% reduction in power consumption can be achieved, all while matching the performance of a nominal voltage single core architecture. Even better results can be obtained when an architecture is specifically designed for subthreshold operation. A novel Discrete Wavelet Transform architecture is presented that is designed to eliminate the need for memory banks, and a power reduction of 26x is achieved compared to a reference nominal voltage architecture that uses memory banks. Issues such as serial to parallel data distribution, dynamic throughput scaling, and memory usage are also explored in this thesis. Finally, voltage scaling greatly increases the design space, so power and timing analysis can be very slow due long SPICE simulation times. A simulation framework is presented that can characterize subthreshold circuits accurately using only fast gate level design automation tools.
Master of Science
Jin, Jie. "Low power design for high performance wireless digital baseband building blocks /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20JIN.
Повний текст джерелаGarrett, Bretton Wayne. "Digital simulation of power system protection under transient conditions." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27303.
Повний текст джерелаApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Venkatraman, Chandrasekar. "Hill climbing digital control algorithm for maximum power point tracking of photovoltaic arrays." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1320938081&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Повний текст джерелаHan, Yu. "Optimization of Modulation Constrained Digital Transmission Systems." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37097.
Повний текст джерелаDing, Lei. "Digital predistortion of power amplifiers for wireless applications." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04022004-020955/unrestricted/ding%5Flei%5F200405%5Fphd.pdf.
Повний текст джерелаJ. Stevenson Kenney, Committee Member ; G. Tong Zhou, Committee Chair ; W. Marshall Leach, Committee Member ; Ye (Geoffrey) Li, Committee Member ; Jianmin Qu, Committee Member. Includes bibliographical references (leaves 100-103).
Doneddu, Daniele. "The use of novel digital power supply to drive laser systems." Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa42441.
Повний текст джерелаJooste, Charl Roelof. "Development of a generic digital controller for power electronic applications." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/2210.
Повний текст джерелаThis thesis presents an investigation into the generic tools, hardware and firmware, involved in power electronic converter control and feedback. The aim was to determine the optimal controller architecture through research of existing controllers. As soon as the architecture was established, design of the controller commenced. Explanations for the various components selected were provided. The design considerations when designing a printed circuit board (PCB) with mixed signals was also presented. The theory behind the control of a multicell converter as well the practical implementation of the control scheme in firmware was presented.
Franco, Marcelo Jorge Herczfeld Peter R. "Wideband digital predistortion linearization of radio frequency power amplifiers with memory /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/485.
Повний текст джерелаChung, Jae Hak. "Applications of digital signal processing to electric power quality and wireless communications /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаAl-Atrash, Hussam. "INTEGRATED TOPOLOGIES AND DIGITAL CONTROL FOR SATELLITE POWER MANAGEMENT AND DISTRIBUTION SYSTEMS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3287.
Повний текст джерелаPh.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering PhD
Popescu, George. "Digital Signal Processing Methods for Safety Systems Employed in Nuclear Power Industry." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479815935917872.
Повний текст джерелаShridevi, Rajesh Jayashankara. "Emerging Security Threats in Modern Digital Computing Systems: A Power Management Perspective." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7483.
Повний текст джерелаPan, Fei. "Multifrequency Averaging in Power Electronic Systems." UKnowledge, 2014. http://uknowledge.uky.edu/ece_etds/62.
Повний текст джерелаNewman, Michael John 1976. "Design and control of a Universal Custom Power Conditioner (UCPC)." Monash University, Dept. of Electrical and Computer Systems Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5651.
Повний текст джерелаMartelli, Chiara. "Multi-standard low-power base-band digital receiver, enhanced for HSDPA /." Konstanz : Hartung-Gorre, 2006. http://www.loc.gov/catdir/toc/fy0707/2007366221.html.
Повний текст джерелаSummary in Italian and English; text in English. Includes bibliographical references (p. 171-177).
Van, Papendorp J. F. "Digital control of line-interactive UPS." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6537.
Повний текст джерелаENGLISH ABSTRACT: The digital control of UPS systems has been difficult in the past due to a lack of DSP technology. It was for this reason not possible to establishing the necessary control to regulate the voltages and currents of the UPS systems. Recent advances in DSP technology have however provided the means of establishing central control of the UPS system as well as incorporating more complex closed-loop control algorithms by utilising a single floating-point DSP. Closed-loop control strategies are investigated and the central control of a line-interactive UPS is established in this study. Both the status of the physical system as well as various system parameters are controlled. The system both regulates and charges the storage batteries when the main utility supply is maintained. In the event that the utility fails, the converter instantaneously changes power flow towards the load with the aim of maintaining an uninterrupted voltage supply. Several closed-loop deadbeat based control strategies are investigated for the regulation of the inductor current. A solution for the regulation of the DC-link is also developed and implemented. Furthermore, an intensive study is done on the regulation of the voltage supplied to the load in the event that the utility supply fails. The investigation is initially approached by considering classical control theory. Although these control strategies provided sufficient results, a predictive strategy that is based on the physical conditions of the switching converter is finally investigated to establish closed loop control of the output voltage. This resulted in a high-bandwidth voltage controller capable of maintaining control under a wide-array of load conditions.
AFRIKAANSE OPSOMMING: Die digitale beheer van UPS stelsels was moeilik in the verlede as gevolg van 'n gebrek aan DSP tegnologie. Dit was vir hierdie rede nie moontlik om beheer te kon bewerkstelling ten einde die spannings and strome in the UPS stelsels te kon reguleer nie. Onlangse vordering in DSP tegnologie het egter dit moontlik gemaak om sentrale beheer van die UPS stelsel te bewerkstellig sowel as om meer komplekse geslote lus beheer algoritmes te inkorporeer met behulp van 'n enkele DSP. Geslote lus beheer strategiëe word ondersoek en die sentrale beheer van die line-interaktiewe UPS word bewerkstellig in hierdie studie. Beide die huidige toestand van die fisiese stelsel sowel as die verskeie parameters word beheer. Die stelsel beide laai en reguleer die batterye terwyl die hooftoevoer onderhou word. In die geval dat die hooftoevoer faal, word die omsetter se rigting van drywingsvloei verander om die las te voorsien van 'n ononderbroke spannings toevoer. Verskeie geslote-lus “deadbeat” beheer strategiëe word ondersoek vir die regulasie van die induktor stroom. 'n Oplossing vir die regulasie van die GS-koppervlak word ook ontwikkel en geïmplementeer. Verder word 'n intensiewe studie gedoen op regulasie van die spanning wat aan die las gevoer word in die geval dat die hooftoevoer faal. Hierdie ondersoek word aanvanklik benader deur klassieke beheer teorie te bestudeer. Alhoewel hierdie beheer strategiëe voldoene resultate gebied het, was 'n voorspel beheerstrategie gebaseer op die fisiese toestand van die omsetter finaal ondersoek. Die resultaat is 'n hoë-bandwydte spannings beheerder wat daartoe instaat is om beheer te handhaaf onder 'n verskeidenheid van lastoestande.
Ganesan, Sharan Kumaar. "Design and Implementation of Digital Spiking Neurons for Ultra-low-Power In-cluster processors." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198115.
Повний текст джерелаWoo, Wangmyong. "Hybrid Digital/RF Envelope Predistortion Linearization for High Power Amplifiers in Wireless Communication Systems." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6924.
Повний текст джерелаChae, Kwanyeob. "Design methodologies for robust low-power digital systems under static and dynamic variations." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52174.
Повний текст джерелаBetowski, David James. "Optimizing the performance of direct digital frequency synthesizers for low-power wireless communication systems." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Fall2004/d%5Fbetowski%5F111104.pdf.
Повний текст джерелаZiegler, Silvio. "New current sensing solutions for low-cost high-power-density digitally controlled power converters." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0077.
Повний текст джерелаKu, Hyunchul. "Behavioral modeling of nonlinear RF power amplifiers for digital wireless communication systems with implications for predistortion linearization systems." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04052004-180035/unrestricted/ku%5Fhyunchul%5F200312%5Fphd.pdf.
Повний текст джерелаMarwali, Mohammad Nanda Rahmana. "Digital control of pulse width modulated inverters for high performance uninterruptible power supplies." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1100484647.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xviii, 224 p.; also includes graphics. Includes bibliographical references (p. 199-211).
Mandrekar, Rohan Uday. "Modeling and Co-simulation of Signal Distribution and Power Delivery in Packaged Digital Systems." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10459.
Повний текст джерелаMuppalla, Ashwin K. "Ultra low power multi-gigabit digital CMOS modem technology for millimeter wave wireless systems." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/41084.
Повний текст джерелаNsumbu, Cassandra Daviane. "Development of a soft-core based power electronic conversion controller." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/2379.
Повний текст джерелаThe application of digital control techniques has become dominant in power electronics owing to several advantages they present, when compared to analogue solutions. Their development is based on the use of microprocessors and microcontrollers, such as Application Specific Integrated Circuit (ASIC), Digital signal processors (DSP), Field Programmable Gate Arrays (FPGA), or a combination of these devices. This thesis presents an investigation of a soft-core based FPGA control system as a solution for power electronic applications. The aim was the development and implementation of a conversion controller, which purpose is to supply control inputs in the form of digital Pulse Width Modulation (PWM) signals, to a number of power electronic applications, such as single half and full bridge DC-DC converters, three phase and multicell inverters. The PWM control technique is achieved via their power semiconductor switching devices. These PWM control signals are necessary for the high frequency conversion of an analog input voltage (AC, DC or unregulated) to an analog output voltage of another level (AC or DC). This was intended to be achieved by exploiting and combining the advantages that FPGA and embedded processors provide such as high reconfigurability and multipurpose ability. This controller’s digital outputs, namely PWM switching signals, can be directly delivered to an analog signal amplification circuit to create an adequate voltage level before being processed by the converters’ switches.
Liang, Feng. "Performance enhancement of digital relays for transmission line distance protection /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,153681.
Повний текст джерелаZhang, Fan. "Power-aware scheduling in computing and communications with QoS requirements /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?COMP%202005%20ZHANGF.
Повний текст джерелаRachinger, Christoph [Verfasser]. "Power Efficient Digital Transmission for MIMO Systems using Spherical Codes : Leistungseffiziente digitale Übertragung für Mehrantennensysteme mittels sphärischer Codes / Christoph Rachinger." Aachen : Shaker, 2018. http://d-nb.info/1162794305/34.
Повний текст джерелаFrancis, Gerald. "A Synchronous Distributed Digital Control Architecture for High Power Converters." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/31942.
Повний текст джерела
This thesis proposes a synchronous digital control architecture that allows for the communication and control of devices via a fiber optic communication ring using digital technology. The proposed control architecture is a multidisciplinary approach consisting of concepts from several areas of electrical engineering. A review of the state of the art is presented in Chapter 2 in the areas of power electronics, fieldbus control networks, and digital design. A universal controller is proposed as a solution to the hardware independent control of these converters. Chapter 3 discusses how the controller was specified, designed, implemented, and tested. The power level specific hardware is implemented in modules referred to as hardware managers. A design for a hardware manager was previously implemented and tested. Based on these results and experiences, an improved hardware manager is specified in Chapter 4. A fault tolerant communication protocol is specified in Chapter 5. This protocol is an improvement on a previous version of the protocol, adding benefits of improved synchronization, multimaster support, fault tolerant structure with support for hot-swapping, live insertion and removals, a variable ring structure, and a new network based clock concept for greater flexibility and control. Chapter 6 provides a system demonstration, verifying the components work in configurations involving combinations of controllers and hardware managers to form applications. Chapter 7 is the conclusion. VHDL code is included for the controller, the hardware manager, and the protocol. Schematics and manufacturing specifications are included for the controller.
Master of Science
al-Sarʻāwī, Said Fares. "Design techniques for low power mixed analog-digital circuits with application to smart wireless systems /." Title page, contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09pha461.pdf.
Повний текст джерелаTauqeer, Tauseef. "Low Power, High Speed InP-Based Digital Intergrated Circuits for Ultra Wide Band Communicatiopn Systems." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508526.
Повний текст джерелаAlharbi, Faisal Shaji. "Digital signal processing techniques for peak-to-average power ratio mitigation in MIMO-OFDM systems." Thesis, Loughborough University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510322.
Повний текст джерелаSun, Xin. "Protection performance study for secondary systems with IEC61850 process bus architecture." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.563989.
Повний текст джерелаFung, Cheuk-wai. "A diagrammatic algorithm for minimum sampling frequency and quantization resolution for digital control of power converters." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39389960.
Повний текст джерелаFung, Cheuk-wai, and 馮卓慧. "A diagrammatic algorithm for minimum sampling frequency and quantization resolution for digital control of power converters." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39389960.
Повний текст джерелаSperlich, Roland. "Adaptive power amplifier linearization by digital pre-distortion with narrowband feedback using genetic algorithms." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-06232005-152633/.
Повний текст джерелаLeach, William M., Committee Member ; Sills, James A., Committee Member ; Kenney, J. Stevenson, Committee Chair ; Zhou, G. Tong, Committee Co-Chair ; Fenney, Robert K., Committee Member.
Leung, Matthew Chung-Hin. "CMOS RF SOC Transmitter Front-End, Power Management and Digital Analog Interface." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24664.
Повний текст джерелаPendyala, Shilpa. "Synthesis Techniques for Sub-threshold Leakage and NBTI Optimization in Digital VLSI Systems." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/6012.
Повний текст джерелаWan, Kai. "Advanced current-mode control techniques for DC-DC power electronic converters." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Wan_09007dcc80642d38.pdf.
Повний текст джерелаVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 4, 2009) Includes bibliographical references.