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Filtering by: Creator True, K. Remove constraint Creator: True, K. Academic Affiliation Electrical Engineering and Computer Science Remove constraint Academic Affiliation: Electrical Engineering and Computer Science Resource Type Dissertation Remove constraint Resource Type: Dissertation

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  • Development of two-variable maximum power point tracking control for ocean wave energy converters utilizing a power analysis and data acquisition system

    Creator:
    Amon, Ean A.
    Abstract:
    Ocean wave energy shows great potential as a developing form of renewable energy. However, challenges arise in maturing this technology to achieve cost-effective energy conversion. Development and testing of wave energy converters can be problematic due to the harsh environment in which they are operated. To promote development of this...
    Resource Type:
    Dissertation

  • Methodology for evaluating mechanical power in small-scale WEC experiments

    Creator:
    Simmons, Asher
    Abstract:
    Wave energy converters (WECs) are a broad class of emerging technology that converts hydrokinetic energy into some other useful form, such as electricity. The last stage in this transformation, the power take-off (PTO) subsystem, is often not experimentally evaluated until half-way through the recommended development process. This delay in evaluation...
    Resource Type:
    Dissertation

  • Advances in low-level software protection

    Creator:
    Van Dyke, Colin William
    Abstract:
    Preventative methods for software reverse engineering have been given greater attention in recent times due to the increase in computational resources and tools available to the public. The inherent security provided by encoding source into machine code (executable form) can no longer be assumed, given the availability of effective automated...
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    Dissertation
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    in Low-Level Software Protection Abstract approved: Çetin K. Koç Preventative methods for

  • A novel unified algorithm and hardware architecture for integrated modular division and multiplication in GF(p) and GF(2[superscript]n) suitable for public-key cryptography

    Creator:
    Tawalbeh, Lo'ai Ali
    Abstract:
    The spread of the internet and communications techniques increases the necessity for security in applications that involves sharing or exchange of secret or private infor- mation. Public-key cryptography is widely used in establishing secure communication channels between the users on the Internet, for E-commerce transactions, and in net- work security...
    Resource Type:
    Dissertation
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    −D. If the first is true, then gcd(C, D) = gcd((C + D)/2, D) = gcd((C + D)/4, D), and |(C + D)/4

  • Development of a grid-scale energy storage solution via demand response using model predictive control of multiple residential water heaters

    Creator:
    Halamay, Douglas A.
    Abstract:
    As the growth of renewable energy sources, such as wind, solar, and ocean wave, increases, their impact on the electrical grid has been rapidly escalating. Although renewable resources have been able to offset some traditional generation, they have also brought a need for increasing reserve capacity due to their non-dispatchable,...
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    Dissertation
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    equation (2.1) and the output equation (2.2). 12 𝐱(𝑘 + 1) = 𝐀𝐱(𝑘) + 𝐁𝑢𝐮(𝑘) + 𝐁𝑣𝐯

  • Evaluating the seismic risk and resilience of an electrical power system

    Creator:
    Chalishazar, Vishvas H.
    Abstract:
    The Pacific Northwest is part of the "Ring of Fire," which is well-known for heavy seismic activity. Numerous active faults in the area have encouraged electric grid managers in the region to more deeply contemplate and proactively intervene to support grid resilience. This research introduces Monte Carlo (MC) based power...
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    Dissertation
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    , . . . , x p[Dk|Rj ], k = 1, . . . , y p[Ll|Dk], l = 1, . . . , z 1 A1 α11. . .α1i. . .α1w β111. . .β1ij

  • Development and Experimental Hardware Validation of Novel Variable Speed Hydropower Control Schemes for Emerging Applications and Water Resource Paradigms

    Creator:
    Starrett, Michael A.
    Abstract:
    Recent opportunities for new hydropower generation in the United States have often been in non-powered dams and run-of-river type flows occurring in low-impact natural areas and unregulated conduits. At the same time, a changing water resource paradigm is challenging some existing generation in drought stricken areas where supply reservoirs behind...
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    Dissertation
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    power in a true market), BPA has continued to operate a more traditional exchange using bilateral

  • Highly digital power efficient techniques for serial links

    Creator:
    Inti, Rajesh
    Abstract:
    Low power, high speed serial transceivers are employed in a wide range of applications ranging from chip-to-chip, backplane, and optical interconnects. Apart from being capable of handling a wide range of data rates, the transceivers should have low power consumption (mW/Gbps) and be fully integrated. This work discusses enabling techniques...
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    Dissertation
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    has relied on the “constant-field” approach (holds true till 90 nm gate lengths) and it can be shown

  • Offloading of I/O transactions in current CPU architectures

    Creator:
    Larsen, Steen K.
    Abstract:
    IO transactions within a computer system have evolved along with other system components (i.e., CPU, memory, video) from programmed IO (PIO). In current mainstream systems (spanning from HPC to mobile) the IO transactions are CPU-centric descriptor-based DMA transactions. The key benefit is that slower IO devices can DMA write system...
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    Dissertation
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    DISSERTATION OF Steen K Larsen for the degree of Doctor of Philosophy in Electrical and Computer Engineering

  • Atomic Layer Processing for Next-Generation Microelectronic Materials

    Creator:
    Holden, Konner E. K.
    Abstract:
    Atomic layer deposition (ALD) is an enabling technique for many new micro- and nanoscale technologies. The self-limiting surface chemical reactions by which ALD fundamentally operates give rise to uniquely high precision (atomic) control over deposited film thickness, uniformity over large areas, and conformality over complex and extreme topographies. One such...
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    Dissertation
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    substrate. .... 14 Figure 2.5. R.I. and k as a function of incident wavelength obtained from VASE

  • A direct-drive wave energy converter with contactless force transmission system

    Creator:
    Agamloh, Emmanuel B.
    Abstract:
    Commonly proposed ocean wave energy converters (OWEC) use inefficient and maintenance demanding intermediate hydraulic and pneumatic systems. We propose a novel rotary direct-drive OWEC that eliminates these intermediate stages. The new device employs a contactless force transmission system (CFTS) comprising a “piston” and a “cylinder” and a ball screw to...
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    Dissertation
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    :______________________________________________________ Alan K. Wallace Annette R. von Jouanne Commonly proposed ocean wave

  • Development of high efficiency solar absorbers

    Creator:
    Ravichandran, Ram
    Abstract:
    Current cadmium telluride and copper indium gallium diselenide thin-film solar cells (TFSCs) utilize thick absorbers (2 - 4 μm). For efficient carrier extraction in these TFSCs, the absorber layer requires high carrier mobilities and a long minority carrier lifetime, which necessitates the use of a high purity, defect-free thin film....
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    Dissertation
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    (AM0), at the Earth’s surface (AM1.5), and a blackbody radiation at 5800 K. . . . . . . . . . 4 2.2 (a

  • Information-theoretic Approach to Design and Evaluate Privacy-preserving and Fair Frameworks for Continuous High-dimensional Data

    Creator:
    Alsulaimawi, Zahir Ahmed Hussein
    Abstract:
    Deep learning is becoming the latest trend in sensitive applications, such as healthcare, criminal justice, and finance. As these new applications emerge, adversaries are circumventing them. Further, there have been concerns about the possibility of bias and discrimination in predictive applications. In order to address these issues, we propose an...
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    Dissertation
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    , and its true risk w.r.t. P is R( f ) , EP(X ,Y )[L( f (x),y)], where L : Y ×Y → R is a given loss

  • Ultra-low-energy transmitters for battery-free wireless sensor networks

    Creator:
    Panitantum, Napong
    Abstract:
    As the number of autonomous data collection applications keep increasing, the demand for wireless sensor networks (WSNs) has seen explosive growth. In this dissertation, an ultra-low-energy WSN transmitter is developed to reduce the energy consumption of sensor nodes in WSNs. With an ultra-low-energy transceiver, it is possible to eliminate the...
    Resource Type:
    Dissertation

  • Power-efficient two-step pipelined analog-to-digital conversion

    Creator:
    Lee, Ho-Young
    Abstract:
    Hand-held devices are among the most successful consumer electronics in modern society. Behind these successful devices, lies a key analog design technique that involves high-performance analog-to-digital conversion combined with very low power consumption. This dissertation presents two different approaches to achieving high power efficiency from a two-step pipelined architecture, which...
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    Dissertation
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    Page 5.8. Power consumption ratio  vs. (a) logic delay td and (b) scaling factor k

  • Power System Planning for Sustainable, Reliable, and Accessible Electricity: Models, Methods, and Metrics

    Creator:
    Cicilio, Phylicia R.
    Abstract:
    Generation resources are shifting from centralized, high inertial, fossil fuel based to decentralized, no inertia, and variable renewable resources. The evolution of generation resources in electrical grids requires the transformation of the electrical grid infrastructure, and operation and planning procedures and standards. This dissertation takes four investigations into how to...
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    Dissertation
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    those who don’t even know those doors exist. He is a true asset to anyone who is lucky enough to have

  • A multi-bit hybrid DSM over full-scale range without feedback DEM

    Creator:
    Kwon, Sunwoo, 1974-
    Abstract:
    Evolution of the mobile communication standards and proliferation of hand-held devices mandate stringent Analog-to-Digital Converter (ADC) specifications. Among various ADCs, a ∆Σ ADC is best known as a power-efficient ADC when more than 12b is required. However, a conventional discrete-time (DT) ∆Σ Modulator (∆ΣM) is inadequate for low-power wideband applications...
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    Dissertation
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    -domain when zk = 1 1 z−zk ro s−sk × 1 z1−αk −z1−βk ro s r0 = sk r0 = 1β−α 1 (z−zk)2 r1s+r0 (s−sk)2

  • Testing of wave energy converters using the Ocean Sentinel Instrumentation Buoy

    Creator:
    Lettenmaier, Terrance
    Abstract:
    Ocean testing of Wave Energy Converter (WEC) prototypes is necessary to facilitate commercial WEC development. The Ocean Sentinel Instrumentation Buoy, completed in August 2012, provides a stand-alone load for WEC prototypes during ocean testing. The first part of this work was to develop the power conversion and data acquisition equipment...
    Resource Type:
    Dissertation

  • High efficiency delta-sigma modulation data converters

    Creator:
    Lee, Kyehyung
    Abstract:
    Enabled by continued device scaling in CMOS technology, more and more functions that were previously realized in separate chips are getting integrated on a single chip nowadays. Integration on silicon has opened the door to new portable wireless applications, and initiated a widespread use of these devices in our common...
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    Dissertation
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    5.4 (a) Pole locus with k at m = 2.5. (b) Pole locus with m at k = 0.5 for modulator in Fig. 5.3

  • A Generation Prioritization Method for Power System Restoration with Renewable Resources

    Creator:
    Mate, Adam
    Abstract:
    The electrical grid is a key component of the Nation's critical infrastructure. Its continuous and reliable operation is of vital importance; any system-wide disruption would have a debilitating impact on crucial services, public health and safety, the economy, and the national security of the United States. High-impact low-frequency events pose...
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    Dissertation
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    . Arthur K. Barnes, at Los Alamos National Laboratory, for his professional guid- ance and assistance in