46,614 research outputs found
PROCESS IMPROVEMENT IN 0.152 CMOS FOR PLASMA INDUCED DAMAGE IN GATE CURRENT PERFORMANCE
No full textMaster'sMASTER OF SCIENCE IN ADVANCED MATERIALS FOR MICRO- & NANO- SYSTEMSDissertation Supervisors 1. Prof. Chua Soo Jin, Deputy Director of SMA, NUS 2. Mr. Lee Hsu Meng, Senior Engineer, Systems on Silicon Manufacturing Company Pte. Ltd
Top-down selective attention for robust perception of noisy and confusing patterns
No full textA neural network model is developed for the top-down selective attention (TDSA), which estimates the most probable sensory input signal based on previous knowledge and filters out irrelevant sensory signals for high-confidence perception of noisy and confusing signals. The TDSA is modeled as an adaptation process to minimize the attention error, which is implemented by the error backpropagation algorithm for the multilayer Perceptron classifiers. Sequential recognition of superimposed patterns one by one is also possible. The developed TDSA model is applied to the recognition tasks of two-pattern images, superimposed handwritten characters, and noise-corrupted speeches.The author acknowledges technical contributions of his former students and staffs, especially Ki-Young Park, Su-In Lee, and Byung-Taek Kim, and financial supports from Korean Ministry of Science and Technology as a Brain Neuroinformatics Research Program
Letter from K.W. Lee to Friends of Michi Weglyn, November 1, 1997
No full textA letter from K. W. (Kyung Won) Lee, an investigative journalist who wrote for the Sacramento Union, to the Friends of Michi Weglyn. Lee wrote that Weglyn was instrumental in the campaign to free Chol Soo Lee, a Korean American man was on death row, but later had his convictions overturned. Lee also wrote that other Japanese American activists were instrumental to the success of this campaign.These materials are from box 73 and 74 of the Frank Chin Papers. The Frank Chin Papers contain personal and professional correspondence between Frank Chin and Michi Weglyn relating to particular projects on which either author was working as well as files related to the Day of Remembrance Tribute to Michi Weglyn
Development of a foldable micro electric vehicle for future urban driving with intelligent control
No full textThere have been continuous efforts from global automotive industries with the new environmental regulations in order to reduce air pollution, to mitigate the global warming and to emphasize low carbon green growth. Micro mobility can be a new mode of transport that is being develop in order to provide a potential solution to the above issues. This paper introduces the foldable micro electric vehicle and focuses on prototype design and control architecture of that. The innovative design of folding mechanism and the motor control system without position sensing is proposed. This method uses current information from Energy Management System (EMS) to estimate position of the folding motor. In-wheel drive control system for micro mobility is proposed
Optimization of heat recovery steam generator through exergy analysis for combined cycle gas turbine power plants
No full textThis paper proposes a new approach to finding the Optimum design parameters of the heat recovery steam generator (HRSG) system to maximize the efficiency of the steam turbine (bottom) cycle of the combined cycle power plant (CCPP), but Without performing the bottom cycle analysis. This could be achieved by minimizing the unavailable exergy (the sum of the destroyed and the lost exergies) resulted from the heat transfer process of the HRSG system. The present approach is relatively simple and straightforward because the process of the trial-and-error method, typical in performing the bottom cycle analysis for the system optimization, Could be avoided. To demonstrate the usefulness of the present method, a single-stage HRSG system was chosen, and the optimum evaporation temperature was obtained corresponding to maximum useful work for given conditions of water and gas temperatures at the inlets of the HRSG system. Results show that the optimum evaporation temperature obtained based on the present exergy analysis appears similar to that based on the bottom cycle analysis. Also shown is the dependency of number or transfer unit (NTU) on the evaporation temperature, which is another important factor in determining the optimum condition when the construction cost is taken into account in addition to the operating cost. The present approach turned out to be a powerful tool for optimization of the single-stage HRSG systems and can easily be extended to multi-stage systems. Copyright (c) 2008 John Wiley & Sons, Ltd
NaI(Tl) crystal scintillator encapsulated in two organic-scintillator layers with pulse shape data analysis
No full textThallium-doped sodium iodide (NaI(Tl)) crystals are widely used in radiation
detection applications, from gamma-ray spectroscopy to particle dark matter
searches. However, if the crystal is exposed to relative humidity of even a few
percent, its light emission degrades, making the crystal impractical as a
detector. Surrounding the crystal with organic scintillators not only protects
the surface of the crystal from humid air but also offers a new capability to
tag backgrounds such as external gamma rays and surface contaminations. We
developed a detector that is constructed by fully encasing a NaI(Tl) crystal in
a plastic scintillator and then immersing the plastic-crystal assembly in
liquid scintillator. Using data collected from this triple phoswich detector, a
pulse shape analysis is able to identify the various radiation signals from the
three scintillators. Additionally, we find that the crystal's emission quality
is maintained for a month.Comment: 14pages,7figure
Dominant Channel Estimation via MIPS for Large-Scale Antenna Systems Using One-Bit ADCs
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