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.

유압관로의 비정상유동에 따른 임피던스 전달특성

모양우,유영태,나기대,김지환 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.6

Design for quite operation of fluid power system requires the understanding of noise and vibration characteristics of the system. This paper presents a dynamic response of design of hydraulic circuit. Experimental investigations on the attenuation of pressure ripple in automotive power steering hydraulic pipe line is examined. Also, a mathematical model of hydraulic pipe is proposed to support a design of the hydraulic circuit. and the impedance characteristics of pressure ripple is analyzed. It is experimentally shown that power steering hydraulic pipe attenuates pressure ripple with high frequency.

원심압축기의 선회실속특성에 관한 연구

모양우,나기대,유영태,김지환 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.2

In the present study, the performance characteristics and the number of stall cell during rotating stall of a centrifugal air compressor were experimentally investigated. Rotating stall in the vaneless diffuser were investigated by measuring unsteady pressure fluctuations at several different diffuser radius using a high frequency pressure transducer. The number of stall cell and their rotational speeds are distinctive features of the rotating stall phenomenon. The present study is mainly forced on the analysis for the stall cell number and its propagation speed unstable operating region of the compressor. The interpretation method of visualization is based on the pressure distribution in the circumference pressure fields while plotting the pressure and its harmonics variations in time in polar coordinates. To obtain the visualize the existence rotating stall, auto-correlation function and the frequency spectra of the pressure fluctuations were measured at rh-2 = 1.52. When the flow coefficient is lower than 0.150, the static pressure at impeller inlet is higher than that at inlet duct of the Compressor. And the flow coefficient is lower than 0.086, several stall cell groups of discrete frequencies are observed.

여행비용접근법[TCM]에 의한 관광효과 추정 : 대호농어촌관광휴양단지를 중심으로 Application for Daeho Rural Tourism & Leisure Complex

유영희,임재환,구승모 충남대학교 농업과학연구소 2004 농업과학연구 Vol.31 No.2

Since 1989, 9 major complex have been invested with government funds, for the purpose of developing agricultural tourism to increase agricultural income and job opportunity, as well as providing urban population leisure opportunity. However, systematic and comprehensive approaches were rarely done in analyzing its economic impacts. This study, therefore, focuses on analyzing tourism effect and its economic value and implication for a representative rural tourism site, "Daeho rural tourism complex". To analyze travel pattern, expenditure pattern, and degree of satisfaction from travel to Daeho complex, Travel Cost Method(TCM) was employed based on survey method. Results from linear model with statistical significance implies that tourism benefit for each visitor is 28,373 won and total annual benefit for the Daeho site is 7 billion won. Considering annual benefit stream, the present value of total benefits are 132.9 billion won and 70 billion won at 5% and 10% of discounting rate, respectively. Using the values of benefit estimated from this study and investment cost, B/C ratio, IRR, and NPV were calculated to be 1.01, 1.67 billion won, and 5.19% at 5% of discounting rate. These results could be directly compared with the previous analyses.

유압관로에서 맥동유동의 유량특성

유영태,모양우,김지환 朝鮮大學校 機械技術硏究所 2001 機械技術硏究 Vol.4 No.2

The measurement of unsteady flow rate is importance to clarify and improve the dynamic characteristics in pipeline, hydraulic components and systems. There is also demand for a real time flow at the sensor in order to measure unsteady flow rate with high accuray and fast response to realize feedback control of flow rate in fluid power systems therefore We propose an approch for estimating unsteady flow rate through a pipeline and dynamic characteristics of pulsting flow rate components under high pressure condition. Unsteady flow rate is estimated by using semiconductor type pressure transducers and the measured pressure values at two distant points along the pipeline.

PC12를 이용한 신경세포 허혈모델에서 irp94 유전자의 발현

김승환,양영모,하영록,정성필,유인술,김인병 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: The ischemia responsive protein 94 kDa(irp94) gene belongs to the heat shock protein 110 family and was isolated in 1999 from rat brain by transiently induced forebrain ischemia. The PC12 cell is the pheochromocytoma cell line of rat, which is differentiated to a sympathetic neuron-like cell by the stimulation of a nerve growth factor. This study is to determine whether irp94 is expressed when an ischemia-like condition is induced by ATP depletion in cultured PC12 cells in vitro. Methods: PC12 cells were maintained as monolayer cultures in RPMI-1640 medium(Sigma) supplemented with 10% horse serum, 5% fetal bovine serum, 5 mg/ml transferrin, and 1 mg/ml insulin in a humidified 5% CO2 incubator at 37℃. The ATP depleting agent antimycin A was added at concentrations of 1, 2.5, and 5 μM to simulate ischemia, and 10 μg/ml of tunicamycin, which is expected to express heat shock protein maximally, was used as a positive control. The cells were harvested after a 60-minute incubation, and the total RNA was extracted. The reverse transcription polymerase chain reaction(RT-PCR) was performed to use 501 bp irp94 cDNA as a molecular probe, and the expression of irp94 mRNA was analyzed by northern blotting. Results: The irp94 mRNA expression was enhanced, compared to the negative control group, as the concentration of antimycin A was increased. Conclusion: This study suggests that irp94 mRNA expression is enhanced as the severity of ischemia is increased. Thus, it is possible to investigate the mechanism of ischemic neuronal injury indirectly by using this in-vitro model of neuronal ischemia.

노인 외상 환자의 중증도 분류 시 Triage-revised Trauma Score의 의의

양영모,하영록,정성필,김승환,유인술 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Backgrouds: The mortality of geriatric trauma patients is higher than that of other age groups. However, little research has been done the methods or criteria of triage for geriatric trauma patients. This study evaluated a clinical significance of the triage-revised trauma score(t-RTS) for triage of geriatric trauma patients. Methods: We retrospectively analyzed clinical data on 528 trauma patients over 65 years of age who were treated from Jan 1999 to Dec 2000. The t-RTS was calculated utilizing the RR(respiratory rate), SBP(systolic BP), and GCS scores and the ISS was abstracted from the final diagnosis. The obtained t-RTS and ISS were evaluated using the measures of sensitivity, specificity, accuracy, and AUC curve. Results: The overall mortality rate was 9%, and there was no significant differences between the survival group and the mortality group according to age and sex. The mean scores of SBP, RR and GCS of the survival group were significantly higher than those of mortality group(p=0.001). The mean of t-RTS and RTS of the survival group were also significantly higher(p=0.001), but the ISS was significantly higher in the mortality group(p=0.001). The t-RTS, RTS, and ISS showed good prediction rates on the ROC curve(p=0.001), and the AUC value was higher in the ISS than in the t-RTS and the RTS. The sensitivity and the accuracy were high in the t-RTS and the RTS, and the specificity was high in the ISS. The t-RTS is less than 10 for a survival probability of 50% or less Conclusions: Implementation of the t-RTS in the triage of geriatric trauma patients in the field and in emergency room would be very useful. The probability of death in geriatric trauma patients is high when the t-RTS is less than 10.

Centerless Feeder 장치의 개발

강형모,권경우,김기길,정의식,허영환 한밭대학교 산업과학기술연구소 1994 논문집 Vol.2 No.-

This paper presents results of the development of centerless feeding system which are applicable to bearing metal processes. As a result, the feeding system can be applied to automatic surface finishing on the bearing metal process such as bush, and has greatly effects on the increase of the prodnctiving and the decrease of the man power an effect on increase the productivity and decrease the man power and effect on increase the productivity and decrease the man power of the bush machining process.

유압관로의 임피던스 전달특성

유영태,나기대,모양우,김지환 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.2

Design for quite operation of fluid power system requires t h understanding of noise and vibration characteristics of t h system This paper presents a dynamic response of design of hydraulic circuit. Experimental investigations on the attenuation characteristics of pressure ripple in automotive power steering hydraulic pipe with dynamic response of hydraulic pipe line is examined.

위내시경에 의한 칫솔제거

최성곤,권영오,김성국,최용환,정준모 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

최근 내시경술의 발전으로 진단적인 측면 뿐 아니라 그 치료적인 면에서도 많이 이용되고 있는 실정이다. 저자들은 오심을 해결하기 위해 칫솔로 설근부를 자극하여 구토를 유발하던 중 우발적으로 연하되어 식도·위 접합부 및 위내에 있다가 내시경으로 제거된 칫솔 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. With the improvement of the technique and instrument, the gastroduodenal endoscope has been used not only in diagnostic purpose but in therapeutic approach. In this case, we removed a swallowed toothbrush in esophagus and stomach with gastroduodenal endoscope and snare without complication.