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류승관,현진해 대한내과학회 1990 대한내과학회지 Vol.38 No.4
Colon cleansing regimens alter the colonoscopic and histologic appearances of the human colon mucosa. To determine whether colon-cleansing methods change the colon mucosa, 94 normal subjects were studied prospectively from January. 1989 to March 1989, and the following manipulations of six different regimens were assessed at random: Normal saline 1.5 liter enema, more than four times, 14 cases; oral castor oil 100㏄ and normal saline 1.5 liter enema, 19 cases; oral castor oil 100㏄ and soapsuds 1.5 liter enema, 14 cases; oral magnesium cirtate 250㏄ and normal saline 1.5 liter enema, 16 cases; oral magnesium citrate 250㏄ and soapsuds 1.5 liter enema, 14 cases; and oral Golytely 4 liter, 125㏄ each five minutes, 17 cases. The colonoscopic musosal change rates caused by colon-cleansing regimens were as follows: Normal saline enema 0%, oral Golytely 0%, oral castor oil and normal saline enema 63.2%, oral castor and soapsuds enema 85.7%, oral Mg citrate and normal saline enema 18.7% and oral Mg citrate and soapsuds enema 85.7%. The histologic appearances of the colon mucosa after normal saline enema and oral castor were no different from those seen in humans without enema. The histologic changes after colon-cleansing regimens took place occurred mostly in the epithelial surface compartment, the lamina propria compartment and goblet cells. Oral caster made more histologic changes of the colon mucosa than those seen in oral Mg citrate, and there were more histologic changes in the soapsuds enema than in the normal saline enema. Therefore, the colonoscopic and histologic interpretations of colon mucosa in inflammatory colonic diseases need further information about colon-cleansing methods.
IMS기반 이동패킷망에서의 IPv4/IPv6 연동구조 설계 및 구현
류승관,김영한,You, Seugn-Kwan,Kim, Young-Han 대한전자공학회 2006 電子工學會論文誌-TC (Telecommunications) Vol.43 No.11
본 논문에서는 IMS(IP Multimedia Subsystem)기반의 이동통신망에서 IPv4를 기반으로하는 UA(User Agent)와 IPv6를 기반으로 하는 UA간 통신을 위한 구조를 제안하고 이를 검증하기 위해 IMS 프로토콜 변환기를 설계하고 구현한다. 이를 위하여 IPv4/IPv6간의 이전 시나리오를 정리하고 분석하였고 분석된 결과를 바탕으로 이전의 필수 요소인 프로토콜 변환기를 제시하였다. 제시된 IMS 프로토콜 변환기는 IMS-ALG(IP Multimedia Subsystem - Application Level Gateway)기능과 TrGW(Translation Gateway)의 기능들로 구성되었고 이들 구성요소를 구현하고 실험을 통하여 이들의 적합성을 검증하였다. In this paper, we propose an architecture for communication between the IPv4-based UA and the IPv6-based UA in IMS based Mobile Networks, and design and implement the IMS protocol Translator for verification of the architecture. For the design of the internetworking between the IPv4 and the IPv6, we analyze the transition mechanisms and investigate the protocol translator. The IMS protocol translator is composed of the IMS-ALG(IP Multimedia Subsystem - Application Level Gateway) and TrGW(Translation Gateway), and the conformance of these components are verified by experiments.
전기장이 튜브내 예혼합화염 전파속도에 미치는 영향에 관한 연구
류승관(S. K. Ryu),원상희(S. H. Won),차민석(M. S. Cha),정석호(S. H. Chung) 한국연소학회 2006 KOSCOSYMPOSIUM논문집 Vol.- No.-
The effect of electric fields on flame speed has been investigated experimentally by observing propagating premixed flames in a tube for methane/air mixtures. The flame speeds were measured in both the normal and micro gravity conditions to substantiate the measurements. The results show that the flame speeds were enhanced by both the AC and DC electric fields, as the flame approached to the high voltage electrode located on the one end of the tube. The enhancement of flame speed was proportional to the square root of the electric field intensity, defined as the voltage applied divided by the distance of flame from the high voltage electrode, when the electric field intensity is sufficiently large. When the electric field intensity was low, there existed critical intensities, below which the electric fields did not influence the flame speed. This critical electric field intensity correlated well with the flame speed.
원추형 공동과 분사공을 이용한 단발 레이저 유도에 의한 다점점화
류승관(S. K. Tyu),원상희(S. H. Won),정석호(S. H. Chung) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, an advanced laser-induced multi-point ignition technique with a single-shot laser is proposed. This ignition technique has been experimentally investigated in the constant-volume chamber filled with methane/air premixture by means of high speed shadowgraph for visualization of flame spread and pressure recording. Each a conical cavity opened near the apex and a closed conical cavity is installed on the prechamber and main chamber, respectively which is aligned with the path oflaser beam. And two jet-holes are installed on the top and bottom of the prechamber. Two ignition points are occurred at the conical cavities because of laser-induced ignition and hot gaseous jets from prechamber cavity and two jet-holes occur three ignition point.<br/> This result shows that this ignition technique has an advantage of significant reduction of total combustion time and flame initiation period, and exhibits more rapid and a higher maximum pressure rise than another laser-induced ignition technique.
중국 시청자의 국가이미지와 문화혼종성 인식이 한류 브랜드파워와예능 프로그램 시청태도에 미치는 영향
문정,류승관 인문사회 21 2022 인문사회 21 Vol.13 No.5
중국 시청자의 국가이미지와 문화혼종성 인식이 한류 브랜드파워와예능 프로그램 시청태도에 미치는 영향문 정*ㆍ유 승 관** 연구 목적: 이 연구는 한국에 대한 국가 이미지의 하위 요소와 한류 브랜드 파워의 관련성을 분석하고, 문화적 혼종성에 대한 인식정도와 해외 예능 프로그램 포맷에 대한 태도와 영향을 분석했다. 연구 방법: 한국 예능프로그램을 시청한 경험이 있는 대상을 중심으로 설문조사를 실시하였다. 연구 내용: ‘국민성’과 ‘국민 스타일’ 이미지는 유의미했고, 문화적 혼종성에 대해 잘 알고, 교육 수준이 높을수록, 젊은 층일수록 해외 예능프로그램에 대해 긍정적 이었다. 혼종성 요인 중 ‘양가성’과 ‘잡종성’이 유의미한 요인이었다. 결론 및 제언: 국민성과 국민스타일 국가이미지는 한류 경쟁력을 높이는 요인으로 나타났다. 핵심어: 한류, 브랜드파워, 국가이미지, 문화적 혼종성, 예능프로그램 포맷 □ 접수일: 2022년 8월 8일, 수정일: 2022년 9월 15일, 게재확정일: 2022년 10월 20일* 주저자, 동명대학교 대학원 언론영상광고학과 박사수료(First Author, Completion of Doctoral Course, Tongmyong Univ., Email: erqing_wj@126.com)** 교신저자, 동명대학교 미디어커뮤니케이션학과 교수(Corresponding Author, Professor, Tongmyong Univ., Email: sryu27@naver.com) Influence of Chinese Viewers’ Perception of National Imageand Cultural Hybridity on Hallyu Brand Powerand Viewing Attitude of Entertainment ProgramsWen Jing & Seungkwan Ryu Abstract: The purpose of this study was to analyze the relationship between the sub-elements constituting the national image of Korea and the Korean Wave brand power, and cultural hybridity of overseas entertainment program formats. Statistical analysis was conducted based on a survey. The images of ‘people’s character’ and ‘people’s style’ were significant. The more well aware of cultural hybridity, the higher the level of education, and the younger the age, the higher the positive attitude toward overseas entertainment programs. The factors influencing the attitude toward entertainment programs were ‘ambivalence’ and ‘hybridity’. Nationality and national style of Korea is a factor that increases the competitiveness of the Korean Wave. Key Words: Hallyu, Brand Power, National Image, Cultural Hybridity, Entertainment Program Format