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Digital still and video cameras require ADCs with high 14b or more of resolution to obtain sufficient image quality after the data pass through the color processing pipeline. A column-parallel ADC in CMOS image sensors helps to enable high-speed readout of high-quality images by preventing the large wideband noise caused by high-speed analog readout(More)
We decompose stock return autocorrelation into spurious components—the nonsynchronous trading effect (NT) and bid-ask bounce (BAB)—and genuine components—partial price adjustment (PPA) and time-varying risk premia (TVRP), using four key ideas: theoretically signing or bounding the components; computing returns over disjoint subperiods separated by a trade(More)
In medical ultrasound imaging, lateral resolution is limited when using a fixed transmit focusing. Various synthetic aperture (SA) techniques, in which two-way dynamic focusing is enabled by utilizing prebeamformed radio-frequency (RF) data have been proposed for improving the spatial resolution. However, SA methods were not extensively evaluated in terms(More)
  • Robert M Anderson, Sang Buhm Hahn, Seoul, Jong-Ho Korea, Park, Kyong Shik Eom +12 others
  • 2007
We decompose stock return autocorrelation into spurious components—the nonsynchronous trading effect (NT) and bid-ask bounce (BAB)—and genuine components—partial price adjustment (PPA) and time-varying risk premia (TVRP), using four key ideas: theoretically signing or bounding the components; computing returns over disjoint subperiods separated by a trade(More)
The Computer Forensics is a research area that finds the malicious users by collecting and analyzing the intrusion or infringement evidence of computer crimes such as hacking. Many researches about Computer Forensics have been done so far. But those researches have focused on how to collect the forensic evidence for both analysis and proofs after receiving(More)