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STEP을 이용한 범용 시스템 간의 데이터 교환에 관한 연구
최현문(Choi Hyun-Moon),신동철(Shin Dong-Cheol),조영상(Cho Young-Sang) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.8
Recently, the industry needs to share manufacturing data among functional groups of the enterprise as well as to share product data throughout its life-cycle because of increasing of competitions and of globally common development. In the 1980s, several of the international standards bodies came to the conclusion that the current generation of translation methods, based on files formats such as DXF and IGES were not capable of supporting complex data models of engineering products. This study is to control as product model to be standardized information raised by structure design and to develop translator utilizing CIS/2 for AP230 that is one of STEP application protocols, to propose process to share structural design data for effective data exchange among commercial packages. As a result, the implemented system can perform more efficient and precise design work, because it is possible to fully exchange electronic data among different programs, such as SAP2000, Xsteel and MIDAS GENw, etc.
東醫壽世保元의 醫源論中 四象醫學의 醫源 및 特徵에 關한 硏究
崔賢,文錫哉,嚴泰植 圓光大學校 漢醫科大學 1984 圓光漢醫大論文集 Vol.- No.2
This thesis is an attempt to study in regard to a distinguishing mark and an origin of Sa-Sang (Four aspects) Medicine in Eui weun Noun (醫源論) : medical History) of the Domg-Eui-Su-Sae-Bo-Weun (東醫壽世保元) which was written by Lee Je Ma who was the one of the excellent oriental medical scholar in Korea, and futhermore to deep comprehension in Sa-Sang Constitutional medicine (四象體質醫學) which is Unique and sciantific. In this study, we has come to the conclusion ad follows ; 1. S.S.C.M. which was created by Dong-Moo (東武公) is the unique and excellent medicine. 2. In S.S.C.M. it is emphasized that an unballanced emotion is the one of the most important etiological factor. 3. S.S.C.M. come within the category of the traditional theory of the oriental medicine.
Testicular atrophy after mumps orchitis: ultrasonographic findings
최현일,양달모,김현철,김상원,정현석,문성경,임주원 대한초음파의학회 2020 ULTRASONOGRAPHY Vol.39 No.3
Purpose: The purpose of this study was to describe the ultrasonographic findings of testicular atrophy after mumps orchitis. Methods: We retrospectively reviewed the case files of eight patients (14 to 24 years old; mean, 17 years) with mumps orchitis and testicular atrophy who were treated between January 2011 and September 2017. On gray-scale and color Doppler, the ultrasonographic features of volume, shape, echogenicity, and degree of blood flow in the testes were analyzed as part of both initial and follow-up ultrasonography. The duration between the initial diagnosis of mumps orchitis and the ultrasonographic diagnosis of testicular atrophy after mumps orchitis ranged from 25 to 230 days (mean, 95.9 days). Results: Of the eight patients with testicular atrophy after mumps orchitis, the testes were affected unilaterally in seven patients (6 right-sided and 1 left-sided) and bilaterally in one patient. The affected testes (n=9) were 23%-55% (mean, 44.7%) smaller in volume (mean, 6.3±2.0 mL) than the contralateral normal testes (n=7) (mean, 10.8±2.3 mL) on follow-up ultrasonography (P=0.001). The shape of the atrophic testes was oblong in seven cases and elliptical in two cases. The atrophic testes were either heterogeneously hypoechoic with multiple hyperechoic islands (n=7) or heterogeneously hyperechoic (n=2). On follow-up color Doppler ultrasonography, the degree of vascularity of the atrophic testis was either similar to (n=3) or lower than (n=6) that of the contralateral testis. Conclusion: On ultrasonography, atrophic testes after mumps orchitis tended to exhibit an oblong shape, heterogeneous low echogenicity with multiple hyperechoic islands, and decreased vascularity.
Design and Implementation of the RF Systems for Bi-directional Wireless Capsule Endoscopes
문연관,이우성,이정현,조진호,최현철,박희준,이주갑,류재종,우상효,원철호 한국멀티미디어학회 2006 멀티미디어학회논문지 Vol.9 No.12
This paper explains that the RF systems for bi-directional wireless capsule endoscopes were designed and implemented. The designed RF systems for a capsule endoscope can transmit the images of intestines from the inside to the outside of a body and the behavior of the capsules can be controlled by an external controller simultaneously. The bi-directional wireless capsule endoscope consists of a CMOS image sensor, FPGA, LED, battery, DC to DC Converter, transmitter, receiver, and antennas. The transmitter and receiver which were used in the bi-directional capsule endoscope, were designed and fabricated with 10mm(diameter)ⅹ3.2mm (thickness) dimensions taking into the MPE, power consumption, system size, signal to noise ratio and modulation method. The RF systems designed and implemented for the bi-directional wireless capsule endoscopes system were verified by in-vivo experiments. As a result, the RF systems for the bi-directional wireless capsule endoscopes satisfied the design specifications.
실시간 공간 워터마킹 기법이 탑재된 모바일 카메라폰 구현
최현덕(Hyun-Duk Choi),권성근(Seong-Geon Kwon),이석환(Suk-Hwan Lee),권기룡(Ki-Ryong Kwon),문영득(Young-Deuk Moon) 한국멀티미디어학회 2008 한국멀티미디어학회 학술발표논문집 Vol.2008 No.2
본 논문은 모바일 카메라폰에서 부정촬영자 및 최초 유포자를 색출할 수 있는 블라인드 워터마킹 기법을 제안한다. 모바일 카메라폰 지그보드 상에서 구현되었으며, 제안한 기법은 실시간으로 워터마킹을 수행하기 위해 카메라로부터 획득한 영상을 에지영역과 평탄영역으로 각각 강도를 다르게 조절해서 워터마크를 은닉하였다. 실험 결과로 모바일 카메라폰 지그보드에서 획득한 영상에서 워터마크의 비가시성과 강인성을 만족하였고, 실시간성에 가까운 성능을 확인하였다.
연구 논문 : Mn/TiO2 촉매를 이용한 저온 SCR 반응에서 산소의 영향
이상문 ( Sang Moon Lee ),최현진 ( Hyun Jin Choi ),홍성창 ( Sung Chang Hong ) 한국공업화학회 2012 공업화학 Vol.23 No.1
본 연구는 Mn/TiO2 촉매를 이용한 저온 NH3-SCR 반응에서 산소의 역할에 대한 영향을 기술하였다. 촉매의 격자산소는 저온 SCR 반응에 참여하며, 기상의 산소는 환원된 촉매를 재산화 시키는 역할을 한다. 이러한 산소의 redox 특성은 SCR 반응활성에 중요한 요소로 작용하며, 격자산소의 이용능력은 표면에 노출된 망간의 산화상태에 큰 영향을 받는다. TiO2 담체 표면에 존재하는 Mn이 MnO2의 망간산화물 형태로 존재할 때가 Mn2O3의 형태로 존재할 때보다 우수한 redox 특성을 가지며, 이러한 망간의 산화상태는 TiO2의 비표면적에 큰 영향을 받는다. This study presents the effect of oxygen on the NH3 selective catalytic reduction (SCR) by Mn/TiO2 catalyst. The lattice oxygen of catalysts is participate in the low temperature SCR, and the gaseous oxygen directly takes part in the rexoidtion of reduced catalyst. These redox properties of oxygen an play important role in SCR activity and the available capability of lattice oxygen depends on the manganese oxidation state of the catalyst surface. MnO2 species has a higher redox property than that of Mn2O3 species on deposited TiO2 surface and these manganese oxide states strongly depend on the TiO2 surface area.