http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Tae Hwan Ha ),( Tae Hoon Oh ),( Sung In Yu ),( Min Kim ),( Jong Wook Kim ),( Won Ki Bae ),( Jae Hyung Kim ),( Seung Suk Baek ),( Mi Jin Ryu ),( Ye Na Choi ),( Ji Young Park ),( Eileen L Yoon ),( Tae 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Non-variceal upper GI bleeding (NVUGIB) is a common medical problem that has signifi cant association with morbidity and mortality. Angiographic detection and subsequent transarterial embolization (TAE) is a primary treatment option when medical and endoscopic treatments fail. We investigated clinical factors that could affect the success of the angiographic detection and prognosis after TAE in patients with NVUGIB refractory to endoscopic therapy. Methods: A retrospective analysis of the clinical data was done in patients with failed endoscopic treatment who underwent angiography for the treatment of acute NVUGIB between May 2002 and May 2013. Patients were divided into detection or non-detection groups according to the presence of bleeding stigmata in angiographic fi nding. Rebleeding defi ned as subsequent bleeding event within 7 days and mortality within 30days were analyzed as outcome parameters after TAE following detection in angiography. Results: A total 45 patients 37 (male, mean age, 65.9±14.9 years) were analyzed and classifi ed as a detection group (n=25, 55.5%) and non-detection group (n=20, 44.6%). Peptic ulcers were the most common cause of refractory NVUGIB. Larger transfusion amount (5.7±3.9 unit vs. 3.5±2.8 unit; P=0.03), prolonged aPTT level (34.2±17.3 sec vs. 21.8±13.8 sec; P=0.01) and short time interval between last endoscopy and angiography (17.5±25.9 hours vs. 34.3±59.5 hours; P=0.04) were found to be signifi cant factors for predicting angiographic detection. TAE was performed in all patients detected in angiography. Rebleeding (44%) was significantly associated with higher Rockall score (8.3±1.5 vs. 6.6±2.4; P=0.046) and mortality (12%) was signifi cantly associated with higher Rockall score (9.3±0.6 vs. 7.1±2.2; P=0.002) and higher level of BUN (55.3±47.4 vs. 27.6±17.4; P=0.01). Conclusions: Clinical characteristics associated with angiographic detection in patients with NVUGIB refractory to endoscopic therapy were severe bleeding, bleeding tendency and early angiographic intervention. The Rockall score is useful parameter for predicting rebleeding and mortality after TAE.
Switched Reluctance Motor의 진동, 소음 특성해석에 관한 연구
정태욱,최태완,이태환 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7
Switched reluctance motor(SRM) drive system is to be compatible for wide range adjustable speed motoring system because it has the same driving characteristics of DC series motor, easy control principle and high efficiency characteristics. By this reason, SRM drive system will be applied to many commercial adjustable speed application that requires economic advantages and high performance abilities. But, SRM drives generate large vibration and acoustic noise because it is rotated by step pulse mmf and switching commutation mechanism. This disadvantage has been obstacles to applicate SRM drives as generalized motor drive system. The main origin of vibration and noise is caused by commutation method which applies step pulse waveform mmf to stator pole and removes the mmf suddenly. This sudden variation of stator flux vibrates stator frame by radial direction and excites natural vibration mode of stator. This paper analyzes the characteristics of vibration and acoustics noise of SRM from the viewpoint of natural mode and driving coidition, and consider the reduction strategy of that.
최종운, 유태환, 김수균, 안성옥 배재대학교 공학연구소 2014 공학논문집 Vol.16 No.1
본 논문은 Unity3D 게임엔진을 이용하여 쉽게 접할 수 있는 아케이드 형식의 미니게임을 제작하는데 목적이 있다. 우리는 미니 게임을 통하여 창의력, 반사 신경을 향상시키도록 하였고, 또한 일상생활에서 볼 수 있는 애완동물이라는 소재를 사용하여, 게임에 접근하기 어려운 사람들에게 친근감을 주게 하는 것을 특징으로 한다. 또한 랭킹 시스템을 도입하여 유저들에게 경쟁을 유도하게 하여 유저들의 게임 참가율을 증대하도록 하였다. 본 논문에서는 Unity3D 엔진을 이용하여, 게임의 개발시간을 단축하여 개발 비용을 줄일 수 있으면서도 게임의 질은 떨어지지 않도록 하였다
하중작용강도 변화에 따른 회전굽힘 피로특성에 관한 연구(2)
안태환 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-
This study has been made investigation for the difference of fatigue strength under variable cyclic-rate, compared with three types cyclic-rate 2700cpm, 750cpm and 100cpm using smooth specimens(Kt=1.025) and center holed specimens(Kt=2.02) of SCM 440 steel were obtained through fatigue tests in the rotating. The following conclusions were obtained 1. The specimen(SCM 440) is continuously softened in the field of low cyclic rate. 2. The fatigue strength become high in case of big stress intensity factor. 3. The crack growth life become fast in high stress level. 4. The time of failure can be predicted in the same conditions.
액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구
임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.
AMESim를 이용한 유압 굴삭기용 Main Control Valve의 해석에 관한 연구
임태형,최종환,양순용,이병룡,안경관 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
The hydraulic excavator has been a popular research object for automation because of its multi-workings and economic efficiency. When it works crane tasks, most of disasters happen. The objective of this paper is to design each components and to construct boom, arm, bucket circuit. These models modeled with AMESim show us change of variables and behavior of excavator. Simulation model will be used for simulator of excavator.
김태경,정순미,김인병,김경환 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4
Purpose: This study was conducted to assess the effect of sprayed 10% xylocaine as a local anesthesia in reducing the pain associated with nasogastric tube(NGT) placement Method: This was a prospective, randomized, case-controlled trial conducted in the emergency department of a university teaching hopital. Study participants were alert patients requiring NGT placement for diagnostic or therapeutic purposes. Patients having NGT placement were randomized to receive either a 10% xylocaine solution or nothing sprayed in the nasopharynx and oropharynx, After 5 minutes, the distal 5 cm of the NGT were lubricated with a liberal amount of sterile, water-soluble, and non-anesthesient jelly before placement. After each procedure, the patient recorded assessment of subjective pain on a 100-mm visual analog scale(VAS). Result: A total of 71 patients were evaluated in the study with 32 in the case group and 39 in the control group. The mean VAS value of the case group was 38.8 mm(95% confidence interval[CI] 2.4 to 51.3); that of control group was 63.31 mm. The mean difference between groups was 24.40 mm(95% CI, 26.9 to 75.9). A statistically significant difference was achieved between the case and the control groups(p<0.01). Conclusion: Sprayed nasopharyngeal and oropharyngeal 10% xylocaine results in a statistically significant reduction in pain during NGT placement.