Filters: Department: "Electrical & Computer Engineering" Collection: "ir_uspace" Format: "application/pdf"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 51 |
 |
Khan, Faisal Habib | PV ground-fault detection using spread spectrum time domain reflectometry (SSTDR) | A PV ground-fault detection technique using spread spectrum time domain reflectometry (SSTDR) method has been introduced in this paper. SSTDR is a reflectometry method that has been commercially used for detecting aircraft wire faults. Unlike other fault detection schemes for a PV system, ground fau... | 2013-01-01 | |
| 52 |
 |
Khan, Faisal Habib | Transfer function mapping for a grid connected PV system using reverse synthesis technique | Mathematical modeling of power electronic converters is a historical problem. Numerous efforts have been documented in literature to model different converter topologies and their control schemes since the 1940s. Traditional modeling approaches avoid transfer function derivation due to high degree o... | 2013-01-01 | |
| 53 |
 |
Mathews, V. John | Blind identification of QAM signals using a likelihood-based algorithm | This paper presents a method for automatically identifying different QAM modulations. This method identifies the modulation type as the hypothesis for which the likelihood function of the amplitudes of the received signal is the maximum. The derivation of the likelihood functions assumes additive wh... | 2013-01-01 | |
| 54 |
 |
Khan, Faisal Habib | Design and simulation of contour mode MEMS resonator on Si for power converters | Microelectromechanical systems (MEMS) resonators on Si have the potential to replace the discrete passive components in a power converter. These devices not only can reduce the size and weight of the converter but also can facilitate the implementation of power converter on a chip. In this paper, a ... | 2013-01-01 | |
| 55 |
 |
Khan, Faisal Habib | Reliability analysis and performance degradation of a boost converter | In general, power converters are being operated in closed-loop systems, and any characteristic variations in one component will simultaneously alter the operating point of other components resulting in a shift in overall reliability profile. This interdependence makes the reliability of a converter ... | 2013-01-01 | |
| 56 |
 |
Simpson, Jamesina J. | Current and future applications of 3-D global earth-ionosphere waveguide models based on the full-vector maxwells equations FDTD method | Advances in computing technologies in recent decades have provided a means of generating and performing highly sophisticated computational simulations of electromagnetic phenomena. In particular, just after the turn of the 21st century, improvements to computing infrastructures provided for the firs... | 2009-01-01 | |
| 57 |
 |
Myers, Chris J. | Using decision diagrams to compactly represent the state space for explicit model checking | The enormous number of states reachable during explicit model checking is the main bottleneck for scalability. This paper presents approaches of using decision diagrams to represent very large state space compactly and efficiently. This is possible for asynchronous systems as two system states conne... | 2012-01-01 | |
| 58 |
 |
Mastrangelo, Carlos H. | Precision curved micro hemispherical resonator shells fabricated by poached-egg micro-molding | This paper presents a new technique for the fabrication of high resolution non-planar precision microshells for hemispherical resonating gyros via a poached-egg micromolding (PEM) method. In PEM, precision ball lenses are used as starting molds. Hemispherical shells are formed on the lenses using fi... | 2012-01-01 | |
| 59 |
 |
Mastrangelo, Carlos H. | MEMS-based hemispherical resonator gyroscopes | This paper introduces a fabrication technique that uses planar MEMS micromachining processes to produce hemispherical resonating shells for gyroscopes. The hemispheres exhibit a quality factor in excess of 20,000 with resonant frequencies in the range of 20 kHz for the 4-node wineglass mode. The fab... | 2012-01-01 | |
| 60 |
 |
Mastrangelo, Carlos H. | Fabrication of localized plasma gold-tip nanoprobes with integrated microchannels for direct-write nanomanufacturing | We present the microfabrication and characterization of an AFM-tip like device with integrated gas delivery microchannel for the generation of localized microplasmas. The device plasma is generated within a submicron region around its tip for direct-write micro and nanofabrication. The device is fab... | 2012-01-01 | |
| 61 |
 |
Mastrangelo, Carlos H. | A high-resolution flexible tactile imager system based on floating comb electrodes | Flexible high-resolution contact force imagers are needed in many applications for robotic grippers and gait analysis, but its intrinsic intimate contact requirement often causes breaking of top metallization layers and failure in a short time. The use of floating electrodes has significantly improv... | 2012-01-01 | |
| 62 |
 |
Mastrangelo, Carlos H. | Characterization of electrical interferences for ground reaction sensor cluster | This paper presents the characterization of electrical interferences for a high-resolution error-correcting biomechanical ground reaction sensor cluster (GRSC), developed for improving inertial measurement unit (IMU) position sensing accuracy. The GRSC is composed of 13 x 13 sensing nodes, which can... | 2012-01-01 | |
| 63 |
 |
Khan, Faisal Habib | Design of drives for inverter-assisted induction generators | This paper investigates the control of power generation using two-phase squirrel-cage induction machines, where the load is connected to one stator winding and the load voltage is controlled through the other winding. The concept can be applied to three-phase machines as well. A state-space model of... | 2012-01-01 | |
| 64 |
 |
Blair, Steven | Optical antenna design for fluorescence enhancement in the ultraviolet | Through rational design, we compare the performance of three plasmonic antenna structures for UV fluorescence enhancement. Among the antenna performance metrics considered are the local increase in excitation intensity and the increase in quantum efficiency, the product of which represents the net f... | 2012-01-01 | |
| 65 |
 |
Khan, Faisal Habib | Fabrication processes and experimental validation of a planar PV power system with monolithically embedded power converters | This paper summarizes the research outcome intended to identify the most suitable device architecture and its implementation for cell-level power conversion in a photovoltaic (PV) system. The fabrication process to accommodate the power conditioning unit with the PV cells using the same process run ... | 2012-01-01 | |
| 66 |
 |
Khan, Faisal Habib | Output impedance modeling of a multilevel modular switched-capacitor converter to achieve continuously variable conversion ratio | The multilevel modular capacitor clamped dc-to-dc converter (MMCCC) topology is completely modular and belongs to two-phase switched capacitor converter group. The conversion ratio of an ideal MMCCC converter in step-up mode is an integer and depends on the number of modules used. For a k-module MMC... | 2012-01-01 | |
| 67 |
 |
Khan, Faisal Habib | Characterization of aging process in power converters using spread spectrum time domain reflectometry | This paper aims to find a new technique to predict the state of health of power converters by characterizing the most vulnerable components in the converter without affecting the normal circuit operation. Spread spectrum time domain reflectometry (SSTDR) can detect most of the aged components inside... | 2012-01-01 | |
| 68 |
 |
Blair, Steven | A 3D glass optrode array for optical neural stimulation | This paper presents optical characterization of a first-generation SiO2 optrode array as a set of penetrating waveguides for both optogenetic and infrared (IR) neural stimulation. Fused silica and quartz discs of 3-mm thickness and 50-mm diameter were micromachined to yield 10×10 arrays of up to 2-... | 2012-01-01 | |
| 69 |
 |
Myers, Chris J. | Formal verification of genetic circuits | Researchers are beginning to be able to engineer synthetic genetic circuits for a range of applications in the environmental, medical, and energy domains [1]. Crucial to the success of these efforts is the development of methods and tools to verify the correctness of these designs. This verification... | 2012-01-01 | |
| 70 |
 |
Myers, Chris J. | A compositional minimization approach for large asynchronous design verification | This paper presents a compositional minimization approach with efficient state space reductions for verifying non-trivial asynchronous designs. These reductions can result in a reduced model that contains the exact same set of observably equivalent behavior in the original model, therefore no false ... | 2012-01-01 | |
| 71 |
 |
Simpson, Jamesina J. | A feasibility study of microjets applied to breast cancer detection | The feasibility of detecting small tumors of diameter 0.5mm inside a human breast is demonstrated using microjets. Microjets are photonic nanojets scaled to microwave frequencies wherein a plane-wave-illuminated dielectric sphere produces a high-intensity, narrow beam of light extending from the sha... | 2012-01-01 | |
| 72 |
 |
Khan, Faisal Habib | Use of spread spectrum time domain reflectometry to estimate state of health of power converters | A new online measurement and analysis method has been presented in this paper to identify the state of health of power converter circuits. Using spread spectrum time domain reflectometry (SSTDR), impedance in the various current paths inside the converter as well as any fault can be identified witho... | 2012-01-01 | |
| 73 |
 |
Khan, Faisal Habib | A high-efficiency modular switched-capacitor converter with continuously variable conversion ratio | The multilevel modular capacitor clamped converter (MMCCC) topology overcomes the difficulties of the multilevel switched capacitor (SC) based dc-to-dc converters in high conversion ratio applications. MMCCC is completely modular and has many other advantageous features. Like most other SC converter... | 2012-01-01 | |
| 74 |
 |
Blair, Steven | Characterization of a 3D optrode array for infrared neural stimulation | This paper characterizes the Utah Slant Optrode Array (USOA) as a means to deliver infrared light deep into tissue. An undoped crystalline silicon (100) substrate was used to fabricate 10×10 arrays of optrodes with rows of varying lengths from 0.5mm to 1.5mm on a 400-μm pitch. Light delivery from ... | 2012-01-01 | |
| 75 |
 |
Myers, Chris J. | An improvement in partial order reduction using behavioral analysis | Efficacy of partial order reduction in reducing state space relies on adequate extraction of the independence relation among possible behaviors. However, traditional approaches by statically analyzing system model structures are often not able to reveal enough independence for reduction. To address ... | 2012-01-01 |