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응축성 입자상 물질과 여과성 입자상 물질의 생성기작 연구
김동우,조현욱,윤종상,한세현,정용원,전기준 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
입자상 물질(Particulate Matter, PM)은 최근 관심을 받고 있는 대기오염 물질 중 하나이다. 입자상 물질은 직접적으로 배출되는 1차 입자상 물질(Primary PM)과 배출된 후 대기 중에서 광화학반응을 거쳐 형성된 2차 입자상 물질(Secondary PM)로 구성된다. 1차 입자상 물질은 여과성 입자상 물질(Filterable PM, FPM)과 응축성 입자상 물질(Condensable PM, CPM)로 나눠지게 된다. 기존 입자상 물질 연구는 주로 FPM 분석으로만 한정되어 있다. 따라서 FPM과 CPM의 생성기작 및 측정법에 대한 연구가 필요한 실정이다. 본 연구에서는 미세먼지 생성원에서 만들어지는 FPM과 CPM의 생성기작 분석을 위하여, ISO 25597 방법을 기반으로 실시간 CPM 농도 측정법(희석측정법)과 고온에서의 FPM 측정법을 설계하였다. 실험은 디젤 보일러에서 진행되었으며 CPM 분석을 위하여 20배 이상의 희석공기를 주입하여 희석비를 조절할 수 있는 공기주입장치와 10초 이상 공기가 충분히 혼합할 수 있는 체류 챔버 그리고 실시간 입자농도 측정 장비로 구성된 시스템을 마련하였다. FPM 분석을 위하여 고온에서 입자농도를 측정하여 CPM 없이 FPM만 측정할 수 있는 시스템 또한 구성하였다.
김동우,전찬용,한양희,박종형,여은경,Kim, Dong-Woo,Jun, Chan-Yong,Han, Yang-Hee,Park, Jong-Hyeong,Yeo, Eun-Kyoung 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.4
We had applied Saenggangunbitang, Gamijihwangtang, and Saenggangunbitang-Gamijihwangtang on a alcoholic liver disease patient with diabetes mellitus, Saenggangunbitang has been used to treat alcoholic liver disease and had known to have beneficial effects. Gamijihwangtang has been used to treat Yin deficiency syndrome in Orient Medicine. We observed clinical symptom, liver function, nutritional state and blood sugar. After first administration, Clinical symptom and blood sugar were improved by Gamijihwangtang medication. Alter second administration, Clinical symptom, blood sugar and liver function were improved by Saenggangunbitang-Gamijihwangtang medication. After third administration, clinical symptom and liver function were improved by Saenggangunbitang medication. It is possibly suggested that Saenggangunbitang-Gamijihwangtang medication has a therapeutic effect on alcoholic liver disease with diabetes mellitus.
X-box를 이용한 Session-oriented Cross play에 대한 보안 요구사항 분석
김동우,강수영,김승주 한국정보보호학회 2019 정보보호학회논문지 Vol.29 No.1
Recent technological advances and industry changes, the game industry is maximizing fun by supporting cross-play thatcan be enjoyed by different platform users in PC, Mobile and Console games. If the boundaries are lost through the crossplay, unexpected security threats can occur due to new services, even if existing security is maintained above a certainlevel. The existing online game security researches are mostly fraud detection that can occur in PC and mobile environment,but it is also necessary to study the security of the console game as cross play becomes possible. Therefore, this papersystematically identifies the security threats that can occur when enjoying cross play against console game users usingSTRIDE and LINDDUN threat modeling, derives security requirements using the international common evaluation standard. 최근 기술의 발달과 산업의 변화를 통해 게임업계는 PC와 Mobile 그리고 Console game에서 서로 다른 플랫폼 유저가 함께 즐길 수 있는 크로스플레이를 지원하여 재미를 극대화 하고 있다. 크로스플레이를 통해 플랫폼의 경계가 없어지면 기존의 보안이 일정수준 이상 유지되었더라도 새로운 서비스로 인해 예상치 못한 보안위협이 발생 할수 있다. 기존에 진행된 온라인 게임보안 연구는 PC와 Mobile환경에서 발생 가능한 부정행위 탐지가 대부분이지만크로스플레이가 가능해짐에 따라 Console game에 대한 보안연구 역시 필요하다. 따라서 본 논문은 Consolegame 유저를 대상으로 크로스플레이를 즐길 때 발생 가능한 보안위협을 STRIDE와 LINDDUN 위협모델링을 활용하여 체계적으로 식별하고 국제공통평가기준을 활용해 보안요구사항 도출하여 크로스플레이에 대한 평가 기준을제시한다.
삼봉강룡반어탕(三蓬薑龍半魚湯)과 가감소적백출산(加減消積白朮散)의 항암효과(抗癌效果)에 대(對)한 비교연구(比較硏究)
김동우,고승희,최유경,심문기,여은경,박세기,박종형,고재철,전찬용,한양희,이청정혜,Kim, Dong-Woo,Ko, Seung-Hi,Choi, You-Kyung,Shim, Mun-Ki,Yeo, Eun-Kyung,Park, Se-Ki,Park, Chong-Hyeong,Ko, Jae-Chul,Jun, Chan-Yong,Han, Yang-Hee,Lee, Chung- 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.3
Objective : It is well known that Gagamsojeokbackchool-san show antitumor effects and its activities are result from enhancement of immune function, we investigated the antitumor effects of Sambonggangyongbaneo-tang and its mechanism. Methods : We measured change of body weight, weight of immune organs (Spleen, Thymus), Liver, Kidney, tumor weight, cytotoxicity for investigation of antitumor effects of Sambonggangyongbaneo-tang. Results : 1. The body weight of mouse has no significant difference between control and sample groups. 2. The weights of immune organs (Spleen and Thymus) decreased significantly in sample groups. The weights of Liver and Kidney have no significant difference. 3. The tumor weights in mouse decreased significantly in sample groups and showed dose-dependent effect. 4. Cell viability of Sarcoma 180 has no significant difference in sample groups. 5. HeLa cell viability has no significant difference in low concentration, but it decreased significantly in high concentration. Conclusions : According to the above results, it could be suggested that Sambonggangyongbaneo-tang has prominant antitumor effects and cytotoxicity.
하악과두하 골절 시 후하악 접근법과 내시경을 이용한 구강 내 접근의 비교
김동우,박대송,이상칠,김성용,임호용,염학열,김현민,Kim, Dong-Woo,Park, Dae-Song,Lee, Sang-Chil,Kim, Sung-Yong,Lim, Ho-Yong,Yeom, Hak-Yeol,Kim, Hyeon-Min 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.6
Purpose: Patients who had a subcondylar fracture with a displaced or deviated condylar segment were treated with a retromandibular approach (RMA) or an endoscope-assisted transoral approach (EATA) in our department of oral and maxillofacial surgery. The clinical results of the approaches were compared. A comparative study of specific approaches for subcondylar fractures has not been published before in Korea. Methods: Twenty-one patients with subcondylar fractures of the mandible were included. Ten patients were treated with the retromandibular approach and 11 were treated with an endoscope-assisted transoral approach. We examined patient age, gender, fracture sites, classifications, period of maxillomandibular fixation, facial nerve (FN) or greater auricular nerve (GAN) injuries, maximal mouth opening, deflection, occlusal changes, number of plates, follow-up period, and other complications. Preoperative computed tomography and pre-operative, post-operative, and follow-up panoramic views were taken of each patient. Results: Mean maximal mouth openings were similar between the two approaches. FN and GAN injuries were more frequent in the RMA group but the deflective rate with mouth opening was higher in the EATA than that in RMA group. Two cases of post-operative infection occurred in the EATA group, and occlusal changes were observed in one case for both approaches. Conclusion: The RMA offers more direct access and visualization of the surgical field but it can cause scars and retractive injuries of the FN and GAN. But, EATA did not result in consequent nerve injuries or scars postoperatively, but unfavorable fractures such as $medial$ $override$ condyles were more difficult to reduce endoscopically. Except cases of an expected difficult reduction, the treatment of choice for a displaced subcondylar fracture may be an EATA.
김동우,박종형,한양희,전찬용,박세기,고승희,이청정혜,고재철,최유경,박지윤,백은기,홍의실,Kim, Dong-Woo,Park, Chong-Hyeong,Han, Yang-Hee,Jun, Chan-Yong,Park, Se-Ki,Go, Seung-Hi,Lee, Chung-Jung-Hye,Go, Jae-Chul,Choi, You-Kyung,Park, Ji-Yun,Ba 대한한방내과학회 2001 大韓韓方內科學會誌 Vol.22 No.2
Alcoholism is a chronic behavior disorder that disturbs the health, social, and economical functions by intaking alcohol repeatedly. Alcoholism includes some habituation, dependency, and addiction. It may be clinically silent or severe enough to lead to the rapid development of hepatic, renal and gastrointestinal failure. Alcoholism can also cause death. In this case, we administrated saenggangunbitang and sungjoocheonggantang to a patient suffering from alcohoism and its withdrawal symptoms. After administration of saenggangunbitang-sungjoocheonggantang medication, clinical symptoms, including liver function with diabetes mellitus and splenomegaly improved. saenggangunbitang-sungjoocheonggantang showed desirable effect on alcoholism symptoms.