Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 76 for “"APD"”.
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Optical communications with a Geiger mode APD array
… of a Geiger mode avalanche photodiode (GM-APD, or Geiger mode APD) array for use in optical communications systems. I designed and implemented a test pattern generator, capable of producing waveforms with OOK and PPM modulations at a variety of symbol rates and duty cycles. Using this …
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Active Power Decoupling (APD) Converter for PV Microinverter Applications
… capacitor, the active power decoupling (APD) technique is widely adopted. Various topologies can be used for APD, but the selection of proper topology, modulation scheme, and circuit components, along with the control strategy, will enhance the efficiency, power density, reliability, and …
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Importance sampling simulation of free-space optical APD pulse position modulation receivers
… accuracy, the bit error rate performance of an APD based free-space optical receiver. An improved technique for the importance sampling simulation of direct detection APD receivers has been developed. Two methods for efficiently simulating and biasing the probability distribution function of the …
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Development of a Multi-Disciplinary Design Optimization Framework for a Strut-Braced Wing Transport Aircraft in PACELAB APD 3.1
… was to extend the analysis methods in PACELAB APD 3.1, a recent commercially available aircraft preliminary design tool with potential for MDO applications, for higher fidelity with physics-based instead of empirical methods and to enable the analysis of nonconventional aircraft configurations. …
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Can the Triarchic Model Differentiate between Psychopathy and Antisocial Personality Disorder?
<p>Although Antisocial Personality Disorder (APD) represents the closest diagnostic equivalent to psychopathy in the DSM-IV, it has long been recognized as failing to capture the full range of the construct. The current study examined the degree to which boldness, a trait domain within the …
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Graph theory analysis of functional and structural connectome: Links to Auditory Processing Disorder
… diagnosis of auditory processing disorder (APD) using the network neuroscience approach and neuroimaging techniques such as functional magnetic resonance imaging (MRI) and diffusion MRI. The first study investigated the functional connection, the whole-brain functional network properties and …
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Acid-phase and Two-phase Codigestion of FOG in Municipal Wastewater
… saturated LCFAs. Adding high FOG loadings to an APD not acclimated to LCFAs allowed for a mass balance calculation and resulted in near complete saturation of unsaturated LCFAs and significant accumulation of LCFA material in the digester, which was found to be mostly 16:0, 18:0, and 18:1. While …
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Neurophysiological bases of frequency discrimination in children with Auditory Processing Disorder or Specific Language Impairment
… old children with Auditory Processing Disorder (APD) or Specific Language Impairment (SLI) could discriminate three different frequency changes behaviorally and electrophysiologically. Behavioral frequency discrimination and event-related potentials were examined using a 1000Hz pure tone base …
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A Descriptive Study of the Similitude That Exists Between Shyness, Generalized Social Phobia, and Avoidant Personality Disorder
… phobia (GSP), avoidant personality disorder (APD), and shyness. Past research on GSP and APD, conducted by Herbert, J.D., Hope, D.A., and Bellack, A.S. (1992; Holt, C.S., Heimberg, R.G., and Hope, D.A. (1992); and Turner, S.M., Beidel, D.C., and Townsley, R.M. (1990), was compared with …
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Strategies for Improved Learning for Students with Audiotry Processing Difficulties
<p>Auditory processing disorder (APD) is a learning disability that affects an estimated 2-3% of children. These children often have difficulty storing, locating and retrieving information from reading and conversation. Unfortunately, they are frequently undiagnosed. When faced with these students, …
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An active-path-dissolution model for corrosion-fatigue cracking of drill-pipe steels in offshore drilling environments
… This model, named the Active-Path-Dissolution (APD) model, simulates a sequence of three corrosion-fatigue processes: chemical notching process, microcrack development, and macroscopic crack growth. The first two processes are combined with mechanical fatigue to simulate corrosion-fatigue crack …
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Modeling and engineering impact ionization in avalanche photodiodes for near and mid infrared applications
Avalanche photodiodes (APDs) are the preferred photodetector in many applications in which low light levels need to be detected. The reason why APDs are important in such applications is due to their internal gain, which improves the APD's sensitivity. Compared to receivers based on PIN …
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Communication-Theoretic Foundations for Optical Receivers Using Dynamically Biased Avalanche Photodiodes
… to reduce cost. Avalanche photodiodes (APDs) are commonly used photodetectors in many high-speed optical receivers due to their internal optoelectronic gain, which allows the photogenerated current to dominate the thermal noise without the need for optical pre-amplification of the …
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Spatial Variation of Cardiac Restitution and the Onset of Alternans
… spatial dependence of action potential duration (APD) and the slope of the dynamic restitution curve S<sub>DRC</sub>, which describes the relationship between steady-state APD and diastolic interval. For tissue with nearly identical cells, I find that APD is longest near the stimulus and shortest …
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Development of high-performance front-illumination III-N avalanche photodiodes by metalorganic chemical vapor deposition
Gallium nitride (GaN) avalanche photodiodes (APDs) having large direct band-gap energy of ~3.5 eV at 300K can exhibit a high sensitivity in the ultraviolet (UV). They are appropriate candidates for many applications because of their capability of operation in the near-UV and visible-blind spectral …
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Dynamic pixel selection in free-space photon-counting optical communication systems for the exploitation of excess channel capacity
… of Geiger-mode avalanche photodiode (GM-APD) arrays, a simple algorithm that only requires information from the GM-APD array to implement the technique of dynamic pixel selection can be realized entirely in software or firmware. Dynamic pixel selection exploits the temporal and spatial …
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Unravelling the genetic relationships between auditory processing and speech and language
… CLRN1, and ADGRV1) might explain some of the APD risk. The phenotype to genotype analysis across coding regions further shows that rare pathogenic variants with large effect in other genes (such as GRHL3, DIAPH1, FAT4 and IFT88) can contribute to risk of APD in simplex cases. These results …
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Examining the influence of physics focused professional development on advanced placement physics teachers
… development beyond the College Board training (APD) were compared with the other seven teachers with little or no additional in-service physics focused training (NAPD). The analysis of the quantitative data from the classroom observation indicated that there was a large treatment effect …
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Computational investigations of atmospheric pressure discharges
… and removal of specific imposed conditions in APD. The periodic stationary pattern of various discharge parameters are exhibited at different times during the prebreakdown, breakdown, formation of cathode fall layer and decay phases. The Penning ionization process performs an outstanding role …
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