BACnet 빌딩제어망에서 통합접근제어 방안

조인준, 송태기 배재대학교 공학연구소 2018 공학논문집 Vol.20 No.1

현재 빌딩시설 관리를 위한 SCADA 제어시스템은 통신 프로토콜로 BACnet을 사용하고 있다. 빌딩 제어망 영역에서 사용되고 있는 BACnet은 인터넷 영역의 통신프로토콜과는 달리 보안에 대한 연구가 미비하다. 따라서 각종 사이버 공격의 대응책으로 BACnet 기반 통합접근제어 시스템이 존재하지 않아 해킹 위협에 노출되어 있다. 문제는 인터넷 영역의 통합접근제어 기술을 제어망 영역인 빌딩시설망에 그대로 적용이 불가능하다는 점이다. 또한 인터넷 영역의 기존기술을 제어망 영역에 맞춰 재개발 한다 하여도 고비용의 문제가 발생한다. 따라서 본 논문에서는 BACnet기반 빌딩 시설망의 특성을 반영한 새로운 통합접근제어 방안을 제안하였다. Currently, the SCADA control system for building facility management uses BACnet as a communication protocol. BACnet, which is being used in building control network areas, has little to do with security, unlike communication protocols in the Internet domain. Therefore, the BACnet-based integrated access control system does not exist as a countermeasure against various cyber attacks, and is exposed to hacking threats. The problem is that it is not possible to apply integrated access control technology of the Internet area to building facilities, which is a control network area. Also, retrofitting existing technologies in the Internet domain to the control network area creates high-cost problems. Therefore, this paper proposed a new integrated approach control plan that reflected the characteristics of the BACnet-based building network.

Euonymus alatus추출물의 실험적 당뇨발생 억제효과

김태중,송희종,소준노,이정호 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.4

Insulin-dependent diabetes mellitus (IDDM) is majorly caused by an immune system-mediated destruction of the beta cells in the islets of Langerhans. Patients with IDDM face major changes in lifestyle and the possibility of debilitating and life-threatening complications. In Korean traditional medicine, Euonymus alatus (EA) extract has been widely used for preventing and curing ulcer and inflammation. A previous study has shown that EA itself has an antidotic activities against inflammation, suggesting possibility that EA can exert this beneficial effects to IDDM by an initial protection against diabetes caused by pancreatic inflammation. The present study was undertaken to evaluate the prophylactic effect of EA extract on the diabetogenesis of streptozotocin (STZ) and alloxan (ALX), using animal model, and to explore the possible mechanisms of its antidiabetic activity. Multiple low doses of STZ (45 mg/Kg for 5 days) in ICR mice and single dose of ALX (60 mg/Kg) in SD rats induced high level of hyperglycemia (defined as plasma glucose level > 300 mg/dl) and remarkably diminished body weight. But, animals that received diabetogenic agents in combination withsEA were maintained plasma glucose level as a normal state ( < 150 mg/dl), and appeared in good health and had similar weights to those of normal control. These results strongly indicated that EA prevented and blocked diabetogenesis of chemicals. EA significantly inhibited the nitric oxide- and tumor necrosis factor-production of mouse peritoneal macrophages. However, EA enhanced interleukin 1 production of macrophages at lower concentration but not at higher. EA itself increased phagocytic activity of unstimulated monocytes, but it did completely block that activity of zymosan- or platelet activating factor-stimulated cells. Taken together, this study led to conclusion that EA itself has a significant prophylactic effects against diabetes, and also suggested that its antidiabetic effects might be manifested by the downregulation of inflammatory process in diabetogenesis.

복막유착의 원인 규명과 예방을 위한 실험적 연구

강대영,송규상,노승무,조준식,이태용 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

Postoperative peritoneal adhesion is the most common cause of intestinal obstruction, and intestinal obstruction is one of the most difficult problems in abdominal surgery. In this experimental study for developing peritoneal adhesion model and its prevention, we divided rats into 5 groups; the talc powder treated group, the cotton-fluff treated group, the talc+fluff treated group, the ischemia group and the control group. There were 16 rats in each group. We made incisions on the midabdomen of the rats and administered talc powder, cotton fluff and talc powder+fluff into the peritoneal cavity respectively. In the ischemia group, we clamped the root of superior mesenteric artery for two minutes to induce ischemia on the small bowel of the rat. We counted the number of the peritoneal adhesive sites in peritoneal cavity on the 7th, 14th , 21st and 42nd postoperative day after peritoneal adhesion induced operation, and observed the characters of the adhesion state. The average number of the peritoneal adhesions were 1.25 per one rat in the talc powder group, 1.44 in the fluff group, 1.31 in the talc+fluff group and 1.31 in the ischemia group compared with 0.94 per one rat in the control group performed sham operation. 91.6% of the all adhesions were observed on the peritoneum of the previous incision sites and only 8.4% of the adhesions were adhered to the peritoneal surface of non-incision sites. The data of this study suggest that peritoneal injury and inflammatory reaction is the major cause of peritoneal adhesion. Also this study indicates that foreign bodies can develop peritoneal adhesion, but the effect is much lower than that of peritoneal injury with inflammatoty reaction.

Mori 체계의 이해

崔尙惇,金泰縣,安琮準,李相錫,崔昌鎬 경북대학교 과학교육연구소 1989 科學敎育硏究誌 Vol.13 No.-

Heuristic understanding of Mori's problem is introduced

조기 위암의 조직 분화도에 따른 내시경적 육안 소견

김남재,이경태,김진희,송규상,이승민,정현용,김석현,노승무,이병석,조준식 대한소화기내시경학회 2000 Clinical Endoscopy Vol.20 No.2

Background/Aims : The aim of this study was to investigate the endoscopic findings of early gastric cancer according to histological differentiation. Methods : One hundred eight cases of early gastric cancer (EGC) which had been confirmed surgically over a 1 year and 7 month period, were studied to assess the relationship between histological differentiation and endoscopic findings. Results : All elevated types of EGC (41 cases) were found to be differentiated carcinoma. 48.2% (30/67 cases) of the depressed type EGC was determined to be differentiated carcinoma, while the others (51.8%) were undifferentiated carcinoma. Twenty-four of thirty cases with differentiated depressed type EGC showed a reddish discolored surface (80%), and the others manifested a whitish or mixed colored surface of red and white. In the undifferentiated depressed type EGC, 73% (27/37 cases) revealed a whitish or mixed colored surface, while the others (27%) showed a reddish discoloration. In the differentiated depressed type EGC, the character of the depressed surface was mainly regular and soft or fine granular (77%), while that of the undifferentiated cases appeared as uneven large granules (43.2%) or fine granules (43.2%), sclerotic (2.8%) and/or elevated (10.8%). The margin of the depressed type EGC with differentiated carcinoma was mainly of a shoaling beach type (83.3%), and that of the undifferentiated carcinoma was not uniform and existed as a cliff type (60%), Riasis coast type (11.4%) and shoaling beach type (28.6%). Conclusions : All elevated types of EGC showed differentiated types, and histological differentiation of depressed type EGC was macroscopically determined by the size of lesions, color, and character of the depressed surface and margin of the depression.

위전절제시 단순공장간치술의 임상적 의의

노승무,배진선,정현용,이병석,조준식,신경숙,송규상,이태용 충남대학교 암공동연구소 2003 암공동연구소 업적집 Vol.3 No.

Purpose: The aim of this study was to evaluate the short-term outcome of a jejunal interposition, by comparing it with a conventional Roux-en-Y gastrojejunostomy, after a total gastrectomy. Materials and Methods: For 28 patients (20 men and 8 women) with a gastric adenocarcinoma, who underwent an isoperistaltic simple jejunal interposition, weight, hemoglobin, hematocrit, serum protein and albumin, and cholesterol levels were checked before the operation and at 1 year and 2 years after the surgery. Also, endoscopy was performed to confirm reflux esophagitis. In this study, the data were collected between January 1993 and July 1999 at Chungnam National University Hospital, and the results were compared with those of the Roux-en-Y procedure. Results: The body weights at 1 year and 2 years after the surgery had returned to 86.0% and 87.6% of the recent original body weight in the jejunal interposition (Jl) group and to 90.8%, 87.0%, respectively in the Roux-en-Y (RY) group. The levels of hemoglobin (g/dl) were 13.3, 12.5, and 11.9 in the Jl group, and 13.8, 12.6, and 12.1 in the RY group at the time of the operation and at 1 year, and 2 years after the surgery, respectively. The total serum protein (g/dl) levels were 7.1, 7.2, and 7.5 in the Jl group and 7.1, 7.0, and 7.2 in the RY gropu at the time of the operation and at 1 year and 2 years after the surgery, respectively. The serum albumin (g/dl) levels were 4.2, 4.1, and 4.2 in the Jl group and 4.2, 4.2, and 4.2 in the RY group at the time of the operation and at 1 year, and 2 years after the surgery, respectively. The total serum cholesterol (mg/dl) levels were 186.5, 174, and 164 in the Jl group and 213.7, 171.1, and 141.0 in the RY group at the time of the operation and at 1 year and 2 years after the surgery, respectively. The endoscopic finding showed that reflux esophagitis occurred in 7.1% of the patients in the Jl group and in 3.5% in the RY group. Conclusion: We think that from the view point of quality of life, a jejunal interposition, as well as a Roux-en-Y procedure, is a useful reconstruction methods for a total gastrectomy. (J Korean Gastric Cancer Assoc 2001;1:210-214)

위전절제시 단순공장간치술의 임상적 의의

노승무,배진선,정현용,이병석,조준식,신경숙,송규상,이태용 충남대학교 암연구소 2003 암연구소 업적집 Vol.3 No.-

Purpose: The aim of this study was to evaluate the short-term outcome of a jejunal interposition, by comparing it with a conventional Roux-en-Y gastrojejunostomy, after a total gastrectomy. Materials and Methods: For 28 patients (20 men and 8 women) with a gastric adenocarcinoma, who underwent an isoperistaltic simple jejunal interposition, weight, hemoglobin, hematocrit, serum protein and albumin, and cholesterol levels were checked before the operation and at 1 year and 2 years after the surgery. Also, endoscopy was performed to confirm reflux esophagitis. In this study, the data were collected between January 1993 and July 1999 at Chungnam National University Hospital, and the results were compared with those of the Roux-en-Y procedure. Results: The body weights at 1 year and 2 years after the surgery had returned to 86.0% and 87.6% of the recent original body weight in the jejunal interposition (Jl) group and to 90.8%, 87.0%, respectively in the Roux-en-Y (RY) group. The levels of hemoglobin (g/dl) were 13.3, 12.5, and 11.9 in the Jl group, and 13.8, 12.6, and 12.1 in the RY group at the time of the operation and at 1 year, and 2 years after the surgery, respectively. The total serum protein (g/dl) levels were 7.1, 7.2, and 7.5 in the Jl group and 7.1, 7.0, and 7.2 in the RY gropu at the time of the operation and at 1 year and 2 years after the surgery, respectively. The serum albumin (g/dl) levels were 4.2, 4.1, and 4.2 in the Jl group and 4.2, 4.2, and 4.2 in the RY group at the time of the operation and at 1 year, and 2 years after the surgery, respectively. The total serum cholesterol (mg/dl) levels were 186.5, 174, and 164 in the Jl group and 213.7, 171.1, and 141.0 in the RY group at the time of the operation and at 1 year and 2 years after the surgery, respectively. The endoscopic finding showed that reflux esophagitis occurred in 7.1% of the patients in the Jl group and in 3.5% in the RY group. Conclusion: We think that from the view point of quality of life, a jejunal interposition, as well as a Roux-en-Y procedure, is a useful reconstruction methods for a total gastrectomy. (J Korean Gastric Cancer Assoc 2001;1:210-214)

원전 노즐 용접부 잔류응력 예측을 위한 Round Robin 해석 결과 분석

송태광(Tae-Kwang Song),배홍렬(Hong-Yeol Bae),김윤재(Yun-Jae Kim),이경수(Kyoung-Soo Lee),박치용(Chi-Yong Park),양준석(Jun-Seog Yang),허남수(Nam-Su Huh),김종욱(Jong-Wook Kim),박준수(June-Soo Park),송민섭(Min-Sup Song),이승건(Seung-Gun 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.1

This paper provides simulational round robin test results for welding residual stress prediction of safety/relief nozzle. To quantify the welding variables and define the recommendation for prediction and determination of welding residual stress, 6 partners in 5 institutes participated in round robin test. It is concluded that compressive axial and hoop residual stress occurs in dissimilar metal weld and pre-existing residual stress distribution in dissimilar metal weld was affected by similar metal weld due to short length of safe end. Although the reason for the deviation among the results was not pursued further, the effect of several key elements of FE analyses on welding residual stress was investigated in this paper.

원전 노즐 용접부 잔류응력 예측에 대한 유한요소 해석 Round Robin 결과 및 분석

송태광(Tae-Kwang Song),배홍열(Hong-Yeol Bae),김윤재(Yun-Jae Kim),이경수(Kyoung-Soo Lee),박치용(Chi-Yong Park),양준석(Jun-Seog Yang),허남수(Nam-Su Huh),김종욱(Jong-Wook Kim),박준수(June-Soo Park),송민섭(Min-Sup Song),이승건(Seung-Gun 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

In this paper, results of simulational round robin test on residual stress prediction was provided. Welding residual stress is one of the reasons for primary water stress corrosion cracking in PWR. Therefore, quantifying the welding variables and defining the recommendation for prediction welding residual stress is important. Through the round robin test, it is known that compressive axial and hoop residual stress occurs in dissimilar metal weld and pre-existing residual stress distribution in dissimilar metal weld was affected by similar metal weld due to short length of safe end.

Reflective and Low-Resistance Zn∕Rh Contacts to p-Type GaN for Flip-Chip Light-Emitting Diodes

Song, June-O,Hong, Woong-Ki,Hong, Hyun-Gi,Kim, Kyoung-Kook,Lee, Takhee,Seong, Tae-Yeon The Electrochemical Society 2005 Electrochemical and solid-state letters Vol.8 No.9