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Ansan, South Korea

Ansan College of Technology is a private technical college in Ansan City, which lies south of Seoul in Gyeonggi province. It offers degree programs in social science , tourism, physical education, industrial design, engineering, and computers. All programs place a strong emphasis on vocational outcomes. The campus stands in Danwon-gu, not far from the massive industrial complex in Sihwa, which facilitates partnerships with local industry. The college enrolls about 3,000 students, and employs about 55 instructors. Wikipedia.

Chung Y.D.,Suwon Science College | Lee C.Y.,Korea Railroad Research Institute | Kim D.W.,Yonsei University | Yoon Y.S.,Shin Ansan University | And 2 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2014

With the fast development of various wireless charging applications such as cell phones and electric vehicles, there is substantial interest in contactless power charging across an air gap. The contactless power transfer (CPT) system based on the resonance coupling method, which is composed of separate coils with the same resonance frequency, is feasible for exchanging energy within 2 m. However, generally, because the contactless charging system adopts a normal conducting wire, the size of the antenna is too large to be equipped to deliver a large amount of power promptly. From this point of view, we propose the combination of CPT technology with high-temperature superconducting (HTS) transmitter antenna, which we call the superconducting contactless power transfer (SUCPT). The superconducting transmitter antenna can deliver a mass amount of electric energy in spite of a small-scale antenna. The SUCPT technique is expected as a refined option to transfer a large amount of power and extend the distance. In this study, our research team achieved the improvement of transmission efficiency and extension of transfer distance using an HTS antenna in the inserted resonator coil between the HTS antenna and normal conducting receiver coils. We achieved improved transfer distance and quantity of about 25% compared with the normal conducting antenna under the same power conditions. © 2002-2011 IEEE.

You D.-H.,Shin Ansan University
Transactions of the Korean Institute of Electrical Engineers | Year: 2014

The purpose of this paper is to establish the optimum fabricating condition of specimens using silk screen printing, and to develop humidity sensor which has good humidity sensing properties. The specimens are fabricated under the condition of 90[wt%] SnO2-10[wt%l TiO2, and their microstructure, crystalline structure, humidity sensing properties are examined. From the microstructure analyses, porosity is best at 700[°C]. From the crystalline structure analyses, intensity of peak becomes strong according to increasing heat treatment temperature. From the humidity sensing properties analyses, an overall results of capacitance changes, linearity and hysteresis for the specimens is best at 600 [°C] and 700[°C]. Capacitance of specimens increases according to decreasing measurement frequency, and to increasing relative humidity.

Kim J.-B.,Gyeonggi do Institute of Health and Environment | Kim J.-M.,Kangwon National University | Cho S.-H.,Kangwon National University | Oh H.-S.,Kangwon National University | And 2 more authors.
Journal of Food Science | Year: 2011

Bacillus cereus can cause diarrheal and emetic type of food poisoning but little study has been done on the main toxins of food poisoning caused by B. cereus in Korea. The objective of this study is to characterize the toxin gene profiles and toxin-producing ability of 120 B. cereus isolates from clinical and food samples in Korea. The detection rate of nheABC, hblCDA, entFM, and cytK enterotoxin gene among all B. cereus strains was 94.2, 90.0, 65.8, and 52.5%, respectively. The ces gene encoding emetic toxin was not detected in all strains. Bacillus cereus strains carried at least 1 of the 8 enterotoxin genes were classified into 12 groups according to the presence or absence of 8 virulence genes. The 3 major patterns, I (nheABC, hblCDA, entFM, and cytK gene), II (nheABC, hblCDA and entFM gene), and VI (nheABC and hblCDA gene), accounted for 79.2% of all strains (95 out of 120 B. cereus isolates). Non-hemolytic enterotoxin (NHE) and hemolysin BL (HBL) enterotoxins were produced by 107 and 100 strains, respectively. Our finding revealed that NHE and HBL enterotoxins encoded by nhe and hbl genes were the major toxins among B. cereus tested in this study and enterotoxic type of B. cereus was predominant in Korea. © 2010 Institute of Food Technologists ®.

Won Y.-J.,Inje University | Cho J.-H.,Shin Ansan University | Kim S.-C.,Gachon University
Journal of Magnetics | Year: 2016

In this study the contralateral breast skin dose was decreased. It was to apply the results to the clinical study after analysis of different radiation dose amounts to contralateral breast with nonmagnetic bolus and without nonmagnetic bolus. A Rando phantom was computed tomography (CT) simulated, five treatment plans were generated: open tangents, open field in field, wedge 15, wedge 30, and intensity-modulated radiotherapy (IMRT) plan with 50.4 Gy to cover sufficient breast tissue. Contralateral breast skin dose was measured at 8 points using a glass dosimeter. The average contralateral breast dose using nonmagnetic bolus showed better excellence in decreasing the absorbed dose in the order of 168 ± 11.1 cGy, 131 ± 10.2 cGy (29%), 112 ± 9.7 cGy (49%), and 102 ± 9.5 cGy (64%) than changing the treatment plan. This study focused on decreasing the effect of scattered dose by use of a nonmagnetic bolus on the contralateral breast during radiotherapy in breast cancer patients and an intriguingly significant decrease was observed parallel to the opposed beam. © The Korean Magnetics Society. All rights reserved.

Shin K.C.,Shin Ansan University
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2010

Co-cured single lap joints under cyclic tensile loads fail initially at the tip of the interface corner between the two adherents. The failure mechanism is complex because it is related to corrosion fatigue. Corrosion behavior at the interface affects the failure of the joints because corrosion deteriorates fatigue resistance. In this study, we clarified the cause of interfacial corrosion in co-cured single lap joints under cyclic tensile loads. The failure mechanism was also analyzed by observing the failed surfaces of specimens and the stress distribution along the interface. The surface roughness at the interface and the stacking sequence of the composite adherent were examined to investigate their effects on failure of the joint.

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