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프로스타글란딘계 점안제를 사용한 환자에서 마이토마이신씨가 섬유주절제술에 미치는 영향
김경태,형성민,Kyung Tae Kim,MD,Sungmin Hyung,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.8
Purpose: To investigate whether mitomycin C (MMC) results in an improved trabeculectomy outcome in primary open-angle glaucoma patients who preoperatively used prostaglandin (PG) ophthalmic solution. Methods: The subjects consisted of three groups of primary open-angle glaucoma patients who underwent trabeculectomy. Group A consisted of 17 patients who did not use PG ophthalmic solution preoperatively, while Group B consisted of ten patients who used PG ophthalmic solution for at least three months but were not treated with MMC during the operation, and Group C consisted of 14 patients who used PG ophthalmic solution for at least three months and were treated with MMC during the operation. The operation was considered successful when the intraocular pressure ranged from 6 to 18 mmHg, regardless of application of ocular hypotensive agents. Results: Four years after the operation, differences of the cumulative success rate between Group A and B (p = 0.008) and between Group B and Group C (p = 0.036) were statistically significant, but differences between Group A and C were not (p = 0.813) (Log rank test results). Conclusions: The cumulative success rate of trabeculectomy in primary open-angle glaucoma patients who used PG ophthalmic solution for at least three months was lower than that of patients who did not use PG ophthalmic solution. However, the intraoperative administration of MMC increased the cumulative success rate of trabeculectomy in patients who did use PG ophthalmic solution for at least three months to a level similar to patients who did not use PG ophthalmic solution. J Korean Ophthalmol Soc 2012;53(8):1124-1130
센서네트워크에서 인-네트워크 프로세싱을 위한 경량 키 관리 프로토콜
김경태(Kyeong Tae Kim),김형찬(Hyung Chan Kim),R. S. Ramakrishna 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.1
본 논문에서는 Wireless Sensor Networks(WSNs)에서 에너지 소모를 줄이기 위해 사용되는 In-network processing에 대하여 보안이 강화된 레벨 키 기반의 Infrastructure를 설계하여 노드의 전복 공격에 대해 안전한 패킷 포워딩을 보장하는 프로토콜을 제시한다. 이러한 계층적 구조를 가지는 보안 Framework는 노드의 추가 혹은 퇴거가 발생했을 때 Re-keying 비용을 획기적으로 줄일 수 있다. 시뮬레이션 결과, 전체 네트워크 중전복된 노드가 40%를 차지할 때, 제안된 프로토콜을 사용하게 되면 약 3%의 추가적인 라우팅 오버헤드 비용으로 15%의 향상된 종단간 패킷 전송률을 보여준다. 또한 Re-keying을 할 때 OFT와 비교하여 통신비용을 현저하게 줄일 뿐만 아니라 서버의 도움 없이 키를 업데이트 하기 때문에 분산환경에 적합한 특징을 갖는다.
김경태(Kyeong Tae Kim),이수형(Soo Hyung Lee),전형국(Hyung-Kook Jeon),김재혁(Jae Hyun Kim),김용연(Yong Yeon Kim),김원태(Won-Tae Kim),박승민(Seung-Min Park) 제어로봇시스템학회 2011 제어로봇시스템학회 합동학술대회 논문집 Vol.1 No.1
최근 네트워크 중심전(NCW)으로 발전하는 국방기술분야에 대규모 실시간 데이터 통신을 위해 미들웨어 표준기술인 DDS(Data Distribution Service)가 적용되고 있다. 하지만 기존 DDS 기술은 국방체계통신객체를 탐색하는 시간이 오래 걸리고, 실시간성을 보장하는 대규모 고신뢰 통신에 한계를 나타내며, 모빌리티가 발생하는 무선통신환경을 고려하지 않고 있다. 따라서 본 논문에서는 DDS에서 보다 효율적인 데이터 전송을 위한 네트워크전송 기술을 제안하였다. 제안된 기술은 DDS 상호운영성을 위반하지 않으면서도 1) 통신객체고속탐색, 2) 실시간 고신뢰성을 위한 하이브리드 멀티캐스팅, 3) 무선통신환경에서 모빌리티 지원을 위한 네트워크통신을 지원한다.
김경태 ( Kyeong Tae Kim ),김형찬 ( Hyung Chan Kim ),( R. S. Ramakrishna ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
본 논문에서는 센서네트워크에서 키 관리 및 안전한 채널을 통한 개체 인증, 메시지의 기밀성 및 무결성을 보장하는 프로토콜을 제안한다. 제안된 프로토콜은 레벨기반의 트리 라우팅 프로토콜을 지원하여 외부 공격, 노드 실패, 그리고 노트 전복에 대하여 강인하며, 노드 상호간의 통신을 위하여 경량 키 관리 알고리즘을 사용하였다. 또한, In-networking 프로세싱을 통해 Data-aggregation 과 Trusted-delivery 메커니즘을 적용하여 가볍고, 견고한 특성을 지니고 있다. 제안된 프로토콜은 TinyOS/Mica 플래폼을 기반으로 TinySec 과 함께 구현된 결과를 제시한다.
복부주열 후의 수지혈압, 신체 및 혈액 검사치의 통계적 분석
김경태 ( Kyung Tae Kim ),하헌주 ( Hun Ju Ha ),이형환 ( Hyung H. Lee ) 한국자연치유학회 2015 Journal of Naturopathy Vol.4 No.1
This study was designed to investigate the physical and blood changes on the human body of 18 clinical subjects who received the abdominal injection thermotherapy. Also, diverse changes in the human physiology were investigated by blood tests and physical changes before and after the abdominal injection thermotherapy. The results were analyzed by IBM SPSS Statistics V.20. The changes in the blood flow were measured in 8 clinical subjects by measuring the hand blood pressure in the left and right fingers 10 times each before and after the thermotherapy. The blood pressure in the right hand of the control group has decreased by 8.2 mmHg in the systolic pressure and 0.6 mmHg in the diastolic pressure. And the one of the test group has increased by 8.23 mmHg in the systolic pressure and 4.73 mmHg in the diastolic pressure. The changes in the thumb, middle finger, ring finger, and little finger showed significance, however, not in the index finger. The blood pressure in the left hand of the control group has decreased by 4.6 mmHg in the systolic pressure and 9.6 mmHg in the diastolic pressure. And the one of the test group has increased by 11.9 mmHg in the systolic pressure and 5.3 mmHg in the diastolic pressure. The changes in the thumb, index finger, middle finger, ring finger, and little finger all showed significance, however, the diastolic changes in the middle finger did not show significance. It seemed that the abdominal injection thermotherapy has influence on the changes of the blood flow of the hand blood pressure. The test group of the thermotherapy showed decrease in the body weight by 1~4 kg, waist measurement by -2.35 cm, degree of obesity by -4.33%, and body mass index by -0.76 kg/m2 while showing increase in the body temperature by 0.5oC on average, all with significance (p<.05). The control group showed no significant physical change. The blood test after the thermotherapy showed significant increase of hemoglobin, lymphocyte count, and neutrophils count with significant decrease of mean corpuscular hemoglobin (MCH),mean corpuscular hemoglobin concentration (MCHC), and white blood cell (p<0.05). On the other hand, there was a increase of red blood cell (RBC), hematocrit, and platelet, and decrease of mean corpuscular volume (MCV), however, these had no significance. The increase of aspartate aminotransferase (AST) and decrease of alanine aminotransferase (ALT) was observed in the liver function test, however, without significance. However, there were significant decrease of gamma glutamyl transferase, total protein, albumin, alkaline phosphatase, and increase of total bilirubin and amylase. The lipid and cardiovascular test results have shown significant decrease in high density lipoprotein (HDL) and total cholesterol (p<.05) and non-significant increase in the total cholesterol and decrease in low density lipoprotein (LDL) after the abdominal injection thermotherapy. The blood glucose test, gout test, and kidney function test have shown significant decrease in uric acid and creatinine (p<0.05), but no significance in the decrease of fasting glucose and blood urea nitrogen before and after the abdominal injection thermotherapy. In conclusion, it could be understood that the thermotherapy has diverse influence on the physical and physiological changes of the clinical subjects. From this, it is considered to be a beneficial natural therapy which can be used for both prevention and treatment of the symptoms of diseases.