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( 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.
충남대학교 공업기술 계열 교사 연수 프로그램에 대한 만족도 분석
류창열,최유현,김판욱,김기수,김태훈,이창훈 忠南大學校 工業敎育硏究所 2005 論文集 Vol.27 No.1
The purpose of this study was to analyze the educated teachers' satisfaction of the in-service education programs of industrial technical and technology teachers in Chungnam National University. This study was carried out through survey to accomplish the purpose. The number of questionnaires collected was 86. This study used the SPSS program to conduct a descriptive analysis of the data. The results of this study were as follows: (1) The satisfaction about 'teachers' participation', 'utilization of audiovisual materials and instruments' and 'level of professor and lecture' was relatively high. (2) The satisfaction about 'environments of in-service education programs', 'evaluation of achievement', and 'efficacy of lectures' was relatively low.
난소절제후 Estrogen을 투여한 흰쥐 대동맥에서 Protein Kinase C-α와 Fas 발현의 변화
이왕수,이상엽,안지현,송영빈,김학진,이광재,유재격,김상욱,김태호,김치정,류왕성 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.3
Estrogen is believed to decrease coronary artery disease. Protein kinase C-α(PKCα)appear to be important in signal conduction pathways. Estrogen treatment increases catalytic activity of PKCα,and activation of PKCαcan modulate estrogen receptor levels and responsiveness. And it was reported that activation of PKC can protect cells from apoptosis induced by Fas ligation. But the beneficial effect of estrogen on PKCαwas not clearly demonstrated. The objective of this study was to evaluate the role of PKCαafter ovariectomy and estrogen therapy in rat aorta. The results were summarized as below: 1. The significant pathological changes were not observed in the rat aorta irrelevant to ovariectomy and estrogen therapy. 2. The expression of Fas was decreased in the aorta of estrogen-treated rats than that of ovariectomized rats without estrogen therapy. 3. Increased expression of PKCαwas more marked in the aprta of estrogen-treated rats than that of ovariectomized rat without estrogen therapy. In conclusion,PKCαmay be important in signal conduation pathway on the effect of estrogen. Activation of PKCαby estrogen reduced Fas expression, suggesting that PKCαactivation may play a role in protection against atherasclerosis. Further studies are needed to elucidate the role of PKCαafter estrogen therapy.
Ryu, Chang Hwan,Ryu, Junsun,Ryu, Youn Mi,Lee, You Jin,Lee, Eun-Kyung,Kim, Seok-Ki,Kim, Tae-Sung,Kim, Tae Hyun,Lee, Chang Yoon,Park, Seog Yun,Chung, Ki Wook,Jung, Yuh-S. Society of Nuclear Medicine 2015 The Journal of nuclear medicine Vol.56 No.10
<P>The purpose of this study was to evaluate the impact of radioactive iodine therapy (RIT) on vocal function during the early follow-up period after total thyroidectomy (TT) using perceptive and objective measurements, questionnaires regarding subjective symptoms, and data on vocal function in a prospectively enrolled and serially followed thyroid cancer cohort. <B>Methods:</B> Of 212 patients who underwent TT and were screened between January and December 2010 at our hospital, 160 were included in the final analysis. Patients with the following histories were excluded: lateral neck dissection, organic vocal fold disease, external radiotherapy, and voice evaluation during thyroxine withdrawal. Patients were stratified into 3 groups: TT, TT with low-dose RIT (1.1–2.2 GBq), and TT with high-dose RIT (≥3.7 GBq). Voice evaluations were performed before surgery and at 1, 6, and 12 mo after TT. <B>Results:</B> Vocal characteristics were altered after TT, including changes on the grade, roughness, and strain scale; increased amplitude perturbation; decreased fundamental frequency; narrowed pitch range; and global disturbances in subjective functional parameters on the voice handicap index. However, the degree of vocal changes among the 3 groups did not significantly differ within the 1-y postoperative follow-up period. According to the results of subgroup analyses of patients who demonstrated good voice outcomes after TT, there were no significant functional differences among the 3 groups. <B>Conclusion:</B> RIT at any dose does not affect vocal function within 1 y of TT.</P>
IEEE 802.11e MAC 프로토콜에서의 EDCF 성능 평가
강태욱 ( Tae-wook Kang ),김민수 ( Min-su Kim ),류정필 ( Jung-pil Ryu ),변태영 ( Tae-young Byun ),한기준 ( Ki-jun Han ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.2
본 논문은 IEEE 802.11e MAC protocol 에서 EDCF 의 성능을 분석하였다. EDCF 에서 차별화된 QoS 를 제공하기 위해 사용되는 AIFS 와 CW 의 값이 전체적인 성능에 미치는 영향을 분석하였다. 성능 분석은 컴퓨터 시뮬레이션을 통해 이루어졌으며, ad hoc network 과 infrastructure network 을 구분하여 실험하였다. 시뮬레이션 결과에 의하면, 각 스테이션들의 성능에 영향을 미치는 요소는 data rate, AIFS 길이, 경쟁 윈도우의 크기 등이며 이 가운데 AIFS 의 길이가 가장 영향을 많이 주며 AIFS의 길이가 같은 경우 최소 경쟁 윈도우 크기에 의해 차이를 보인다.
Ryu, Tae-Kyung,Baek, Seung-Woon,Kang, Rae-Hyung,Jeong, Ki-Young,Jun, Dae-Ryong,Choi, Sung-Wook Elsevier 2018 Journal of controlled release Vol.270 No.-
<P><B>Abstract</B></P> <P>This paper describes the fabrication and evaluation of phase-change material (PCM) nanoparticles containing chlorin e6 (Ce6) and nanodiamonds (NDs) for photodynamic and photothermal approaches for tumor therapy, respectively. The temperature of the PCM nanoparticles containing NDs (ND/PCM, 0.5mg/mL in water) is increased to 45°C during laser exposure for 5min. The singlet oxygen generation intensity of PCM nanoparticles containing Ce6 and NDs (Ce6/ND/PCM) is gradually increased with respect to the laser exposure time. Also, the release of Ce6 from Ce6/ND/PCM can be controlled in an on-and-off manner using laser. Cell ablation tests reveal that Ce6/ND/PCM greatly ablates KB cells upon laser exposure, which is attributed to both the temperature increase in the media and singlet oxygen generation by the released Ce6. In an animal model, tumor volume is notably reduced over time after the intratumoral injection of Ce6/ND/PCM and subsequent laser exposure with a higher efficiency compared to ND/PCM. The Ce6/ND/PCM can be a promising nanomedicine for tumor therapy.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Biodegradation Capacity Utilization as a New Index for Evaluating Biodegradation Rate of Methane
( Tae Gwan Kim ),( Tae Woo Yi ),( Jeong Hee Yun ),( Hee Wook Ryu ),( Kyung Suk Cho ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.5
Density of catalytic organisms can determine the biodegradation capacity and specific biodegradation rate (SBR). A new index, biodegradation capacity utilization (BCU, %), was developed for estimating the extent of actual biodegradation of a gas compound over the full capacity. Three methanotrophic cultures were serially diluted (1-1/25), and methane SBR and BCU were measured. Consistently, biomass reduction increased the SBR and decreased the BCU. Linearity (p < 0.05, r > 0.97) between the BCU and cell density indicated the reflection of biodegradation capacity by BCU. Therefore, BCU is indicative of whether the density of catalytic organisms is pertinent for SBR evaluation of low-soluble gaseous compounds.
A New Single Cross Sweet Corn Hybrid for Early-Planting Culture "Danok3"
Tae Wook Jung,Hyeon Gui Moon,Seon Woo Cha,Beom Young Son,Nam Kyu Park,Sung Kook Kim,Yong Hwan Ryu,Hwang Kee Min,Chang Suk Huh,Jae Wung Lee 한국육종학회 2003 한국육종학회지 Vol.35 No.4
Danok3, a sweet corn hybrid that matures early was developed by the corn breeding team at the National Crop Experiment Station (NCES), RDA in 2001. Inbred KSS2 derived from Golden Bantam was used as the seed parent of Danok3, and inbred KSS22 derived from
류춘욱,김태헌,서경진,김용주,강덕식 慶北大學校 醫科大學 1988 慶北醫大誌 Vol.29 No.1
1984년 4월부터 1987년 12월까지 경북대학교병원 진단방사선과에서 경험한 14예의 상악동 악성종양을 관찰하여 아래와 같은 결과를 얻었다. 1. 병리조직학적으로 편평상피암이 9예였고 선양낭암, 악성흑색종, 횡문근육종, 세망육종, 미분화암이 각각 1예씩이었다. 2. 주된 CT 소견은 상악동내 음영증가와 골파괴가 동반된 연부조직 종괴였으며 전례에서 관찰되었다. 3. 조직학적 분류에 따른 CT 소견상의 특이성은 찾을 수 없었고 두개강내 침범을 제외하고는 종괴 범위의 결정에 대한 조영증강의 잇점은 없었다. 4. 골파괴와 연부조직 종괴확장의 특이한 경로는 찾을 수 없었고 상악동내의 병소의 원발 위치에서의 전방향으로의 확장을 주로 보였다. 5. 상악동 악성종양의 CT는 안와, 하측두와, 익구개와, 익상와 및 비인강 등의 종양침범여부의 판정에 유용하며 치료방침의 결정 및 방사선치료 계획설정에 선택적인 진단방법으로 생각된다. CT findings of proven 15 malignant tumors of maxillary sinus were retrospectively analized to identify CT charactentics. The most common histologic type was squamous cell carcinoma(9 cases). Others were adenoid cystic carcinoma(1 case), rhabdomyosarcoma(1 case), malignant melanoma(1 case), reticulum cell sarcoma(1 case), adenocarcinoma(1 case) and undifferentiated carcinoma(1 case). Majority of the cases are advanced state of disease as 6 cases of T_4, 6 cases of T_3, 3 cases of T_2. The most common finding of malignant tumor was soft tissue mass associated with bone destruction that was noted in all of the cases. Others were bone erosion and displacement, fat plane obliteration, low density within soft tissue mass in that order of frequency. Tumor spreading out of antrum was most commonly to nasal cavity (13 cases), pterygopalatine fossa (12 cases) and ethmoid sinus (10 cases), followed by orbit (9 cases) and infratemporal fossa (7 cases).