Hyung Seok Lee

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Squamous cell carcinoma of the head and neck (SCCHN), which is relatively prevalent in Korea, is believed to be induced by environmental carcinogens and host genetic factors. Accumulating evidence has shown that genetic differences in DNA repair capacity resulting from genetic polymorphism influence the risk of environmental carcinogenesis. We therefore(More)
This study examines some major variables moderating the relationships of service quality, customer satisfaction, and customer loyalty in mobile phone services. The study employed statistical analyses, such as reliability analysis, factor analysis, and hierarchical regression analysis. The results of the study reveal that service quality and customer(More)
OBJECTIVES To evaluate the necessity of preserving the posterior branch of the great auricular nerve during parotidectomy. STUDY DESIGN AND SETTING Forty-six patients undergoing parotidectomy were prospectively analyzed. Twenty-four patients had preservation of the posterior branch of the great auricular nerve; in the remaining 22 patients the nerve was(More)
The purpose of this paper is to verify the relationships among service quality, perceived value, customer satisfaction, and customer loyalty in mobile phone service. The study conducted an empirical research. A total of 384 mobile phone users’ responses were collected from Seoul in Korea. The findings show that service quality positively influences customer(More)
Recently, Dielectric Elastomer Actuator(DEA) comes to the market successfully by introducing commercial products such as tactile interfaces for mobile applications. As an advanced application, we present a tactile display device actuated with dielectric elastomer actuator(DEA) in this paper. By employing fluid coupling between the touch spot and the(More)
This paper estimates the value of Internet information by using the hedonic price model (HPM). We specify a hedonic price function, and measure the consumer’s willingness to pay for attributes to the Internet connection charge. We also identify a functional form for the HPM by using the Box–Cox transformation of the variables in our analysis. Our results(More)
OBJECTIVES The Web-based integrated public healthcare information system (PHIS) of Korea was planned and developed from 2005 to 2010, and it is being used in 3,501 regional health organizations. This paper introduces and discusses development and performance of the system. METHODS We reviewed and examined documents about the development process and(More)
INTRODUCTION Predictive factors for myasthenic crisis after transsternal thymectomy have been reported, but little is known about myasthenic crisis after videoscopic thymectomy (MCAVT). METHODS We investigated 146 myasthenia gravis patients who underwent videoscopic thymectomy. RESULTS Patients with MCAVT had a lower forced vital capacity (FVC) (2.1 vs.(More)
A linearized wavelength-swept thermo-optic laser chip was applied to demonstrate a fiber Bragg grating (FBG) sensor interrogation system. A broad tuning range of 11.8 nm was periodically obtained from the laser chip for a sweep rate of 16 Hz. To measure the linear time response of the reflection signal from the FBG sensor, a programmed driving signal was(More)
Isolated middle cerebral artery (MCA) stenosis in young patients with no other medical condition may be a unique pathologic entity with a benign long-term course. Generally, moyamoya disease shows a progression of stenosis from internal cerebral artery (ICA) to other intracranial vessel. A 26-year-old woman was admitted for choreic movements of the right(More)