Reliability Considerations of Hybrid Power Systems for Critical Facilities

Choi, Se Jin · Ham, Young Hwan · Kim, Myung Chin 충북대학교 컴퓨터정보통신연구소 2008 컴퓨터정보통신연구 Vol.27 No.2

본문참고

지역사회에서 형성된 사회적 지지와 근로자의 사회심리적 스트레스간의 관련성

임화영,김형수,최영환,장성훈,이건세,정최경희,오원기,최재욱,정춘화 대한산업의학회 2006 대한직업환경의학회지 Vol.18 No.4

Objective: This study was performed to examine the relationship between community-based social support and psychosocial distress in workers. Methods: The study subjects were 596 workers recruited from 11 companies in Chungju city. A structured questionnaire was used to assess sociodemographics, health-related behaviors, job characteristics, job stress, work-based social support, community-based social support and level of psychosocial distress. Results: Hierarchical multiple regression analysis showed that workers with no chronic disease, exercise and sufficient sleep had a higher score of psychosocial distress than those with chronic disease, no exercise, and not enough sleep. Coworker's work-based social support and community-based social support were negatively associated with psychosocial distress. The R square value of total independent variables on psychosocial distress was 0.409, and that of community-based social support on psychosocial distress was 0.052. Conclusion: This study showed that community-based social support served as a protective factor against psychosocial distress in some workers. We recommend the establishment of a worksite stress reduction program in occupational level as well as community-based social support.

비만증 환자에서 한약제에 의한 체중 감소효과

Oh, Seung-Joon,Jeong, In-Kyung,Kim, Young-Seol,Choi, Young-Kil,Paeng, Jeong-Ryung,Bae, Jung-Hwan,Shin, Hyun-Dae 경희대학교 동서의학연구소 1999 INTERNATIONAL SYMPOSIUM ON EAST-WEST MEDICINE Vol.1999 No.1

Seung-Joon Oh, In-Kyung Jeong, Young-Seol Kim, Young-Kil Choi, Jeong-Ryung Paeng¹, Jung-Hwan Bae and Hyun-Dae Shin²Department of internal Medicine, College Medicine, Endocrine Research Institute¹. Department of Rehabilitation, College of Oriental Medicine², Seoul, korea. Bady Fat Reduction Effects of Red Ginseng Compound Preparation on the Patients with Obesity. Proceedings of International Symposium on East-West Medicine, Seoul. 244-254, 1999.-Obesity can be defined as a metabolic disease due to an increased state of fat tissues caused by an imbalance of calorie intake and use. Recently, in Korea by improvement and westernization of food intake, along with decrease in exercise activities, the prevalence of obesity has increased greatly. Our objectives were to study stability and effects of decrease in body fat by administering red ginseng compound preparation (known to have body fat decreasing effects in laboratory animals) to obesity patients on low calorie diets. Changes in weight and body fat were measured while carrying out calorie-restricted diets on patients for 4 weeks, then administering red ginseng compound preparation for another 4 weeks. The patients were 20 people whose BMI were 25kg/㎡ or over and whose percent body fat was also 30% or over when tested by bioelectrical conductivity. 1. Changes in weight were from 70.04kg(base line) to 67.43kg(after taking red ginseng compound preparation). 2. In similar sense, BMI decreased from 27.12kg/㎡(base line) to 26.56kg/㎡(after dieting), and further to 26.01kg/㎡ (after taking red ginseng compound preparation). The BMI seemed to decrease significantly compared to the baseline after the use of red ginseng compound. 3. Waist hip ratio was changed from 0.8858(base line) to 0.8728, but it was statistically insignificant. 4. The percent body fat was 35,16%(base line), 33.87%(after dieting), and 31.68%(after taking red ginseng compound preparation). 5. Complete blood cell count and blood chemisrty remained unaffected by the administration. 6. In concern to endocrinologic studies, T3 decreased from 118.7 to 98.2ng/dL, and T4 increased from 8.8 to 9.2㎕/ dL. Epinephrine showed a tendency to decreased from 0.27 to 0.25 ng/mL, and norepinephrine increased from 0.39 to 0.44ng/mL. 7. Leptin was not changed. 8. Some patients complained adverse effects; constipation(5 patients, may be due to diet therapy), fatigue (2 patients), pruritus(2 patients), flushing(s patients), dizziness(3 patients) and epigastric discomfort(2 patients). However their symptoms were mild, so medication did not stopped. In conclusion, loss of weight without significant side effects was observed during low calorie diet and red ginseng compound preparation administration. This is thought to be in relation to sympathetic nerve system rather than adrenal gland. Also, further long0term studies should be required, since the observed results were based on short-term changes in weight.

Hepatocellular Carcinoma in the Elderly: Clinical Characteristics, Outcomes and Treatment Efficacy, Safety in Older than 75 Years

( Ji Ho Seo ),( Sunmin Kim ),( Eunae Cho ),( Chung Hwan Jun ),( Sun Young Park ),( Sung Bum Cho ),( Chang Hwan Park ),( Hyun Soo Kim ),( Sung Kyu Choi ),( Jong Sun Rew ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1

Aims: The number of elderly patients diagnosed with hepatocellular carcinoma (HCC) has been increasing because the increase in the longevity of the general population. But there is no proper management based on age stratification in elderly patients. We compared clinical characteristics, outcomes and treatment efficacy, safety between oldest-old (aged more than 85 years), middle-old (aged between 80 and 85 years) and young-old (aged between 75 and 80 years) patients with HCC. Methods: We conducted a retrospective cohort study, from January 2010 to December 2016, at Chonnam National University Hospital. A total of 550 elderly patients whose data included demographics, co-morbidity, etiology of liver disease, presence of cirrhosis, staging of HCC, treatment modality and treatment related adverse event were evaluated retrospectively. Also overall survival was assessed in enrolled patient. Results: Fifty one patients (oldest-old; median 87 years old), 153 patients (middle-old; median 82 years old) and 346 patients (young-old; median 77 years old) were diagnosed with HCC. Both oldest- and middle-old patients, compared to young-old patients had significantly lower rate of alcohol-related disease (13.7% vs 20.9% vs 34.1%, P = 0.001). There were no significant difference in underlying sex, body mass index, presence of co-morbidity, hepatitis C-related disease and stage of HCC. The Child-Pugh class (CPT class A 88.9% vs 84.1% vs 83.6%, CPT class B 11.1% vs 15.9% vs 15.0% and CPT class C 0.0% vs 0.0% vs 1.3%, respectively, P = 0.912) and Model for End Stage Liver Disease score (mean MELD score 7.22±3.34 vs 5.88±3.01 vs 5.77±3.14, P = 0.166) were no significant difference between the patients with active treatment. The modified UICC staging (stage I 5.6% vs 17.1% vs 18.6%, stage II 55.6% vs 46.3% vs 47.3%, Stage III 22.2% vs 24.4% vs 24.8%, Stage IV-A 11.1% vs 6.1% vs 4.9% and Stage IV-B 5.6% vs 6.1% vs 4.4%, respectively, P = 0.826) and Barcelona Clinic Liver Cancer staging (stage 0 5.6% vs 9.8% vs 9.3%, stage A 16.7% vs 17.1% vs 22.1%, stage B 27.8% vs 29.3% vs 24.8%, stage C 50.0% vs 43.9% vs 41.2% and stage D 0.0% vs 0.0% vs 2.7%, respectively, P = 0.878) were no significant difference between the patients with active treatment. Furthermore, there were no difference between the age groups in treatment modality (Surgical resection 0.0% vs 3.3% vs 5.2%, P = 0.166; Radiofrequency ablation 2.0% vs 8.5% vs 11.0%, P=0.113; Transcatheter arterial chemoembolization 21.6% vs 34.6% vs 41.6%, P=0.014; Best supportive care 62.7% vs 40.5% vs 29.2%, P < 0.001), adverse event related treatment (P = 0.731) and disease-free survival days (329 .3±309.1 days vs 271.7 ± 414.2 days vs 357.2 ± 511.6 days, P = 0.336). Multivariate analysis showed that age, performance status, CTP class, MELD score, modified UICC staging, presence of portal vein thrombosis and ruptured HCC are risk factors for mortality. Conclusions: Clinician should make an active treatment in elderly patients with HCC not a age but performance status, liver function and disease status of cancer.

고령자 (고령자) 십이지장 궤양 (궤양)

정준모(Joon Mo Chung),정극수(Keuk Soo Chung),최용환(Yong Hwan Choi),김인호(In Ho Kim),김효석(Hyo Seuk Kim),김영재(Young Jae Kim) 대한소화기학회 1982 대한소화기학회지 Vol.14 No.1

N/A Clinical studies on patients with duodenal ulcer who visited endoscopy room of Kyungpook National University Hospital since 1976 were performed. Among these patients, we compared the number of patients with gastric or duodenal ulcer yearly, and some aspects of difference between 57 cases of old age(above 60 years) and 129 cases of young age(under 30 years) patients with duodenal ulcer. The results obtained were as follows. 1) In examined cases, number of patients with duodenal ulcer was progressively increased year by year and number of gastric ulcer was more prevalent than that of duodenal ulcer unti11979 when the ratio of gastric and duodenal ulcer became nearly same, and thereafter duodenal ulcer cases were begun more predominant about 2 times that of gastric ulcer in 1981 2) Comparing the sex distribution of old and young age group, male was predominant about 12 times of female cases in young age group and about 2.5 times in old. 3) Overall complications including bleeding, perforation, obstruction and others were seen in 63. 2% of old age group and in 48.1% of young. 4) In 8 weeks follow up cases that was possible although it was least in number, 8 cases were improved or healed in old age group but 5 cases out of 18 cases in young revealed no improvement by ordinary regimen.

알레르기 환자에서 면역요법에 따른 면역학적 지표의 변화

최영환,허영구,김항재,김능수 慶北大學校 醫科大學 1991 慶北醫大誌 Vol.32 No.2

혼합 항원추출액으로 면역요법시 경과 관찰에 도움이 되는 객관적인 지표를 설정하기 위하여 D. farinae 또는 D. pteronyssinus를 포함한 2내지 6가지 복수의 기인 항원을 갖고 면역요법을 6∼12개월 받은 환자(제Ⅱ군)와 2년 이상 받은 환자(제Ⅲ군)를 대상으로 말초혈액 호산구수, 혈청총IgE치, RAST score, 피부반응도, 말초혈액 IgE수용체보유림프구, 말초혈액 T, B림프구 및 T림프구 아형을 측정하여 면역요법을 받지 않은 알레르기 환자(제Ⅰ군)들에서의 성적과 비교 검토하였다. 혈청총IgE치는 6∼12개월 면역요법군 및 2년이상 면역요법군에서 면역요법을 받지 않은 군보다 유의하게 낮았다. (각각 P<0.05) 면역요법전혈청총IgE치가 400IU/㎖이상인 환자에서는 면역요법후 그 감소가 뚜렷하였으나 300IU/㎖이하인 경우는 유의한 감소를 볼 수 있다. 면역요법을 받지 않았는 군에서의 피부반응도지수의 평균은 1.80±1.79였고 6∼12개월 면역요법을 받은 제Ⅱ군 및 2년이상 면역요법을 받은 제Ⅲ군의 피부반응도지수는 제Ⅰ군보다 각각 유의하게 낮았다. 말초혈액 FcεR(+)림프구는 면역요법을 받지 않았는 Ⅰ군보다 Ⅱ군 및 Ⅲ군에서 유의하게 낮았으나 여전히 정상치 이상이었다. 그러나 혈중 호산구수, RAST score, 말초혈액림프구 및 그 아형은 면역요법 전후 유의한 변화를 나타내지 않았다. 이상의 성적에서 혈청총 IgE치, 피부반응도지수, 말초혈액FcεR(+)림프구는 면역치료의 경과를 대체로 추적할 수 있는 지표가 될 수 있을 것으로 생각된다. To determine the reliable parameters for assessing the efficacy of immunotherapy in multi-allergen sensitive allergy patients, we observed the changes of peripheral blood eosinophil counts, total and specific IgE levels, skin-test reactivity index, Fcε receptor-bearing lymphocytes, T/B lymphocytes and T-subsets in peripheral blood in the three groups of allergic asthma or rhinitis patients, the first group(group Ⅰ) of 102 patients who were not on immunotherapy, the second group(group Ⅱ) of 28 patients who received 6-12 months immunotherapy, and the third one(group Ⅲ) of 24 patients who received 2 years immunotherapy. Those patients were sensitive to 2-6 aeroallergens including D. farinae or D. pteronyssinus and all the patients in group Ⅱ and group Ⅲ had been immunized with the specific desensitization vaccine (SDV, Bencard®), resulting good response on symptoms. Total serum IgE levels were significantly decreased in the groups of Ⅱ and Ⅲ, compared with groupⅠand the decrease in IgE was more prominent in the patients of high IgE level over 400IU/㎖ prior to immunotherapy. The mean of skin-test reactivity index was 1.80±0.79 in group Ⅰ and this index was significantly lowered in group Ⅱ and Ⅲ. Significant decrease in Fcε receptor-bearing lymphocytes in peripheral blood was developed in immunotherapy-received groups(Ⅱ and Ⅲ). However, the patients still had higher levels of Fcε receptor-bearing lymphocytes in peripheral blood than normal controls, even after more than 2 years of immunotherapy. The differences of peripheral blood eosinophil counts, RAST score, T/B lymphocytes and T-subsets were not significant between before and after immunotherapy. These findings suggest that serum IgE, skin-test reactivity index and Fcε receptor-bearing lymphocytes in peripheral blood could be useful parameters in assessing the efficacy of immunotherapy with extracts of multi-allergens.

리사이클을 위한 평판 유리 파쇄 장치 개발

최성대,정선환,김잠규,김우재,김용선 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

At a point time, when demand is gradually increasing on LCD and PDP market all over the world, demand on glass which is key part of LCD and PDP is increasing, too. Hence, glasses are being cut by requested size for satisfaction on demands, the remain glass is making problems. This study is for designing installation of handling these remained glasses effectively and easily.

공황장애 집단인지행동치료의 12개월 추적 연구

최영희,박기환,우영재,윤혜영 한국정신신체의학회 2003 정신신체의학 Vol.11 No.2

유방의 관상피내암종에서의 p27_kip1, Cyclin D1 및 p53 단백의 발현

오영륜,송상용,최종순,고영혜,이회정,안긍환 대한병리학회 1999 Journal of Pathology and Translational Medicine Vol.33 No.9

적응-강인 제어기법을 이용한 유압 굴삭기의 궤적 제어

최종환,김용석,김승수,양순용 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

This paper proposes a combined controller frame of the adaptive robust control(ARC) and the sliding mode control(SMC) for the trajectory tracking control of the excavator to preserve the advantages of the both methods while overcoming their drawbacks, namely, asymptotic stability of adaptive system for parametric uncertainties and guaranteed transient performance of sliding mode control for both parametric uncertainties and external disturbance. The suggested control technique is applied for the tracking of a straight-line motion of end-effector of manipulators, and through computer simulations, its trajectory tracking performances and the robustness to payload variation and uncertainties are illustrated.