In a memo from Paul Wolfowitz, Deputy Secretary of Defense, "The Naval Postgraduate School (NPS) is hereby designated the DoD Information Operations Center for Excellence. In that capacity, NPS shall facilitate development of Information Operations as a core military competency and innovation." Commander, US Strategic Command (USSTRATCOM) will serve as Operational Sponsor for the Center on behalf of the Combatant Commands. The Secretary of the Navy and Commander USSTRATCOM will develop a charter for the Center on Wolfowitz's approval, in coordination with the Under Secretaries of Defense for Policy and Intelligence, the Chairman of the Joint Chiefs of Staff, and other DoD officials as appropriate. The charter will address oversight and activities of the Center, including graduate education, research, research opportunities, and transformation. As a tool to enhance the IOCFE USSTRATCOM is looking into the development of a digital library which will specifically provide resources for the Information Operations Community. This thesis conducts a preliminary requirements analysis for the development of a digital library. Successful development of this digital library is expected to effectively enhance the operational areas of Information Operations and Information Warfare within the Department of Defense.

D.Ing. (Electrical and Electronic Engineering) / Conventional power electronic circuits consist of discrete semiconductor devices, tronsformers and reactive components, interconnected according to a circuit diagram. However, as the switching frequencies increase and the weight and volume constraints become more stringent, this traditional approach becomes very limiting. Silicon based IC technology and its high voltage version, HVIC, have made more compact converters possible, but the major reactive elements, such as inductors, capacitors and transformers. must still be constructed and connected discretely ...

QC 351 A7 no. 45 v1 / "The Physics of Quantum Electronics," a two -week, noncredit course sponsored by the Optical Sciences Center, was held from June 15 through June 27, 1969, on the campus of Northern Arizona University in Flagstaff. The course was directed by Professors S.F. Jacobs (University of Arizona) and M.O. Scully (Massachusetts Institute of Technology) and was patterned after the tutorial symposiums sponsored in 1966 and 1967 by Colorado State University, and in 1968 by the University of Arizona. Designed primarily for advanced students, re- search scientists, and technical administrators working in the general area of quantum electronics and coherence physics, the course attracted 90 participants from all over the world. A list of attendees appears at the end of this report.

QC 351 A7 no. 45 v2 / The major areas of quantum electronics are concerned with the generation of electromagnetic fields- -with the theory and operation of stimulated emission devices, stimulated and nonlinear scattering phenomena, etc. A smaller but vital area involves the measurement problem, and explores the ways in which we can determine various properties of optical fields through measurements of intensities, interference, correlations, statistical distributions of photoelectrons, etc. In these lectures we will investigate various techniques for exploring the properties of optical fields. Until some 15 years ago all known optical phenomena could be described by the simple classical theory of elementary optics. In the mid 1950's, two new experiments were reported --the Hanbury- Brown Twiss intensity interferometry experiment, and the light beating experiment of Forrester and coworkers. These experiments generated considerable confusion since many people found in them an apparent violation of well -established physical principles. Subsequently, optics has undergone a revolutionary development with the invention of lasers and the introduction of fast pulse electronics capable of resolving individual photon detection events on a nanosecond time scale or less. The new field of photon statistics has grown rapidly and has already produced a sizable literature. Concurrently with the experimental developments, there has been a rather complete restructuring of the theory of optics which has produced a framework in which all of the newer experiments can be analyzed. A theoretical development has followed two independent paths. A classical theory of optical coherence has been developed, mainly by E. Wolf, based on the earlier work of Gabor and others. More recently, R. J. Glauber has formulated a quantum mechanical theory of optical coherence. Unfortunately, much effort has been expended in trying to prove both the equivalence and the nonequivalence of the two formulations, an undertaking which has produced considerably more heat than light. In these lectures we will attempt to review both the classical and quantum mechanical theories of optical coherence, and will use the results to analyze a variety of experiments. The emphasis throughout will be on gaining physical insight rather than on maintaining mathematical rigor. For those interested in detailed discussions of the theory, references to the literature are included in these notes.

This study attempted to find out what the employment opportunities and requirements were for women in certain areas of electronic manufacturing.

No description available.

The development of high power density power converters has become an important topic in power electronics because of increasing demand in transportation applications including marine, aviation and vehicle system. The possibility for greater power densities due to absence of a DC link is made matrix converter topologies more attractive for these applications. Additionally, with the emerging SiC device technology, the operating switching frequency and temperature of the converter can be potentially increased. The extended switching frequency and temperature range provide opportunities to further improve the power density of the power converters. The aim of this thesis is to understand how SiC devices are different from the conventional Si devices and the effect these differences have on the design and performance of a matrix converter. Specific gate drive circuits are designed and implemented to fully utilize the high speed switching capabilities of these emerging semiconductor devices. A method to evaluate the conduction and switching losses and performance of Si and SiC power devices in the matrix converter circuit is developed. The developed method is used to compare power losses of matrix converters designed with different Si and SiC devices for a range of operating temperatures and switching frequencies. A design procedure for matrix converter input filters is proposed to fulfil power quality standard requirements and maximize the filter power density. The impact of the switching frequency on the input filter volume has also been considered in this work. The output waveform distortion due to commutation time in high switching frequency SiC matrix converters is also investigated and a three-step current commutation strategy is used to minimize the problem. Finally the influence of parasitic inductance on the behaviour of SiC power MOSFET matrix converters is investigated to highlight the challenges of high speed power devices.

The work presented in this thesis aims to improve the performance of the Fundamental PWM sensorless control technique by proposing a new way to estimate current derivatives in the presence of high frequency oscillations. The Fundamental PWM technique offers performance across the entire speed range (including zero speed). The method requires current derivative measurements when certain PWM (Pulse Width Modulation) active and null vectors are applied to the machine. However the switching action of the active devices in the inverter and the associated large dv/dt result in current and current derivative waveforms being affected by high frequency oscillations which prevent accurate measurement of the current derivative. Other approaches have allowed these oscillations to decay before attempting to take a derivative measurement. This requires that the PWM vectors are applied to the machine for a time sufficient to allow the oscillations to decay and a derivative measurement to be made (the minimum pulse width). On some occasions this time is longer than the time a vector would have normally been applied for (for example when operating at low speed) and the vectors must be extended and later compensated. Vector extension introduces undesirable current distortion, audible noise, torque ripple and vibration. In this thesis the high frequency oscillations and their sources are investigated and a method of using Artificial Neural Networks to estimate current derivatives using only a short window of the transient current response is proposed. The method is able to estimate the derivative directly from phase current measurements affected by high frequency oscillations and thus allows a reduction in the minimum pulse width to be achieved (since it is no longer necessary to wait for the oscillations to fully decay) without the need for dedicated current derivative sensors. The performance of the technique is validated with experimental results.

Multilevel converters have received significant interest recently as a result of their high power capability and good power quality. However due to the large number of sensitive components including power semiconductor devices and capacitors used in such circuits there is a high likelihood of component failures. This thesis considers one of the most promising multilevel topologies---the modular multilevel converter (MMC). Several methods are presented to detect and locate open-circuit faults in the power semiconductor devices in an MMC. These methods are based on sliding mode observers (SMOs). The signals used in the proposed methods are already available as measurement inputs to the control system and no additional measurement elements are required. An experimental MMC rig has been designed and built to validate these fault detection and isolation methods. The methods can be used with other multilevel converter topologies employing similar analysis and principles.

This thesis is concerned with the development and testing of a dynamic simulation program for isolated, compact power systems of the type found in the marine and, off-shore environments. The modelling of electrical machines and their controllers is presented; the modelling of prime movers and governors is considered in detail and representations are proposed for the various driver; and loads encountered in these systems. The significant non-linearities in the systems are fully represented, A test procedure applied to an off-shore system is described and test results are presented. These are compared to simulated results for system and prime, mover responses to validate the simulation procedure adopted. In additions other validation procedures using data supplied by manufacturers are presented. These validation procedures are used to justify the mathematical representations of the, various subsystems and also to validate their co-ordination to form a complete system model. Results for a range of system studies are presented to indicate the range, flexibility and versatility of the overall simulation program.