노령에서 고관절 골절에 영향을 주는 수상전 요인

김종오,윤여헌,고영도,유재두,정준모,방한천,강규복 대한골절학회 2002 대한골절학회지 Vol.15 No.4

목 적 : 노령에서 고관절골절의 여러 원인적 요인들과 상관관계를 분석, 그 연관성에 대해 알아 보고자 하였다. 대상 및 방법 : 2001년 1월부터 2002년 5월까지 대퇴 고관절 골절로 본원에서 치료받은 환자중 60세 이상이고 골밀도 검사를 시행받은 158례를 대상으로, 수상전 요인을 나이, 성별, 흡연여부, 비만정도, 골절종류, 수상장소, 다른 이환 질환, 골절전 활동도, 골밀도 검사, 수상당시 바닥의 경도, 수상당시 넘어진 방향, 수상에너지에 따라 대퇴 경부골절과 전자간 골절, 전자간 골절중 안정골절과 불안정 골절로 나눠 비교하였다. 결 과 : 80세 이상의 군에서 대퇴 전자간 골절이 대퇴 경부 골절에 비해 의미있게 많이 발생했음을 알 수 잇었으며(p<0.001) 환자의 수상전 활동정도의 비교에서도 활동정도가 낮았던 군에서 대퇴 전자간 골절이 의미있게 많이 발생하였다(p<0.001). 골밀도 검사에 따른 비교에서는 T-score -3.0 이하인 군에서 대퇴 전자간 골절이 많았으며(p<0.005), 수상에너지에 따른 비교에서는 적은 에너지에 의한 골절이 전자간 골절에서 많았다(p<0.05). 대퇴 전자간 골절은 안정 골절과 비안정 골절로 나눈 비교에서는 사회 활동이 어려운 ADL C이하의 군과(p<0.05), 골밀도 T-score -3.0 이하인군에서는 의미있는 차이를 보였다(p<0.001). 결 론 : 노령에서의 고관절 골절 중 80세 이상의 고령에서, 골밀도 T-score -3.0 이하인 경우, 일상생활 활동정도가 낮은 경우에, 비교적 적은 에너지에 의한 충격시에 대퇴 전자간 골절의 발생이 대퇴 경부 골절에 비해 의미있게 많았고 전자간 골절에서 불안정 골절은 사회활동이 적고 골밀도 T-score -3.0 이하인 경우 많음을 알수 있었다. Purpose : We studied the co-relation on the causes of the hip fracture through the analysis of a relevance on the etiological factors as increased incidence according increasing old age. Materials and Methods : Total 158 cases that treated on the hip fracture from 2001 Jan. to 2002 May were studied. The parameters were age, gender, smoking, obesity, type of fracture, place of fracture, other comorbidity, activity of daily living, bone marrow densitometry, hardness of floor, orientation, injury energy. And then, we analysis of difference between femur neck fracture and femur intretrochanter fracture and between stable femur intertrochanter fracture and unstable femur intertrochanter fracture. Results : The incidence of the femoral intertrochanteric fracture was larger significantly than that of the femoral neck fracture in the older then 80(p<0.001). On the comparison of the pre-fractural activity of daily living, the group revealed lower activity had larger incidence of femoral intertrochateric fracture(p<0.001). Also, the femoral intertrochanteric fracture was more larger osteoporosis patient group(p<0.005), and lower energy trauma(p<0.05). In a unstable femoral intertrochanteric fracture, 21 cases(77.7%) of total 27 cases were belong to the group of the activity of daily living scale below C(p<0.05), 24 cases pf 27 cases were belong to the osteoporosis patient who was estimated below -3.0 on T-score(p<0.001). Conclusion : In the hip fracture of the elderly patients, the femoral intertrochanteric fracture is more prevalance ratherthe femoral neck fracture on the cases of older patient more than 80 year-old, lower activity of daily living scale, lower T-score less than -3.0 on BMD, lower energy trauma. Also, in femur intertrochanter fracture, unstable fracture is more common in low daily activity and owteoporosis.

호산구성 기관지염의 임상적 특징

김용현,윤여일,임건일,박상준,주재학,김용훈,박춘식 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background: Eosinophilic inflammation of airway is usually associated with airway hyperresponsiveness in bronchial asthma. However, there is a small group of patients who has the eosinophilic inflammation in the bronchial tree with normal spirometry and no evidence of airway hyperresponsiveness, which was named eosinophilic bronchitis. The objectives of this study are 1) to investigate the incidence of eosinophilic bronchitis in the chronic cough syndrome and 2) to evaluate the clinical features and course of eosinophilic bronchitis. Methods : We evaluated 92 patients who had persistent cough for 3 weeks or longer. In addition to usual diagnostic protocol, we performed differential cell count of sputum. Eosinophilic bronchitis was diagnosed when the patient had normal spirometic values, normal peak expiratory flow variability, no airway hyperresponsiveness, and sputum eosinophilia(>3%). Result : The causes of choronic cough were post-nasal drip in 33%, cough variant asthma in 16%, bronchitis in 15%, and eosinophilic bronchitis in 12% of the study subjects. Initial eosinophil percentage in sputum of patience with eosinophilic bronchitis was 26.8±6.1% (3.8-63.7%). Treatment with inhaled steroid is related with a subjective improvement of cough severity and a significant decrease of sputum eosinophil percentage (from 29.1±8.3% to 7.4±3.3%)/ During the follow up period of over ? months, recurrence of cough of was associated with reappearance of sputum eosinophilia. Conclusion : Eosinophilic bronchitis is one of the important causes of chronic cough. Assessment of airway inflammation by sputum examination is important in investigating the cause of chronic cough. Cough in eosinophilic bronchitis are effectively controlled by inhaled corticosteroid, but it recurs frequently over a long term period of follow-up(Korean J Med 60:77-84, 2001)

도시성장분석상 위성영상자료와 구역자료의 통합이용에 관한 연구

김재익,황국웅,정현욱,여창환 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.3

위성영상은 도시의 물리적 확산 및 변화를 예측하는데 많이 활용되고 있다. 그러나 이 방법은 도시화된 지역이 어느 정도의 강도로 개발되었는지를 파악할 수 있는 밀도분석에는 적절치 못하다. 이는 위성영상이 미시적 공간단위로 토지이용 현황을 분석하는 반면 통계자료는 거시적 공간단위로 구축되어 있어 통계자료를 미시적인 공간단위에 적용하는데 어려웠기 때문이다. 본 연구는 위성영상자료와 통계청의 기초단위구라는 미시적 구역통계자료를 활용하여 도시성장분석상 이들 자료를 통합하여 활용하는 것이 유용함을 입증하고자 하였다. 연구대상지역은 대구광역시로 하였으며, 분석자료로 1985년과 2000년의 위성영상 Landsat TM틀 와 구역통계자료로 기초단위구를 이용하였다. 분석결과 위성영상자료는 도시의 확산 그리고 기초단위구는 밀도 분석이 용이하여 도시성장에 따른 확산과 밀도변화를 동시에 파악할 수 있었다. Nowadays, a satellite image is widely utilized in identifying and predicting urban spatial growth. It provides essential informations on horizontal expansion of urbanized areas. However, its usefulness becomes very limited in analyzing density of urban development. On the contrary, zonal data, typically census data, provides various density information such as population, number of houses, floor information within a given zone. The problem of the zonal data in analyzing urban growth is that the size of the zone is too big. The minimum administration unit, Dong, is too big to match the satellite images. This study tries to derive synergy effects by matching the merits of the two information sources-- image data and zonal data. For this purpose, basic statistical unit (census block size) is utilized as a zonal unit. By comparing the image and zonal data of 1985 and 2000 of Daegu metropolitan area, this study concludes that urban growth pattern is better explained when the two types of data are properly used.

Ba-Ferrite를 이용한 자기 연마재 개발

김희남,송승기,정윤중,윤여권,김희원,조상원,심재환 한국안전학회 2003 한국안전학회지 Vol.18 No.2

The magnetic polishing is the useful method to finish some machinery fabrications by using magnetic power. This method is one of the precision techniques and has an aim for clean technology in the transportation of the pure gas in the clean pipes. The magnetic abrasive polishing method is not so common in the field of machine that it is not known to widely. There are rarely researcher in this field because of non-effectiveness of magnetic abrasive. Therefore, in this paper we deals with the development of the magnetic abrasive with the use of Ba-Ferrite. In this development, abrasive grain WA has been made by using the resin bond fabricated at low temperature. And magnetic abrasive powder was fabricated from the Ba-Ferrite which was crushed into 200 mesh. The XRD analysis result shows that only WA abrasive and Ba-Ferrite crystal peaks were detected, explaining that resin bond was not any more to contribute chemical reaction. From SEM analysis, we found that WA abrasive and Ba-Ferrite were strongly bonding with each other.

불활성 기체에 대한 열역학적 실험식

김재덕,여미순,이윤우,노경호 한국화재소방학회 2003 한국화재소방학회논문지 Vol.17 No.1

Halon 대체 소화제로 쓰이는 불활성 기체 중 Ar, N₂, CO₂의 단일 성분일 때의 물성(포화압력, 밀도, 점도)에 관한 실험식을 구하였다. 문헌에서 얻은 실험값을 이용하여 다항식 등의 회귀분석에 의해서 실험식을 얻었다. 포화압력은 온도에 대하여 각각 2차와 3차의 실험식으로 표시하였다. 밀도는 Ar, N₂는 온도에 대한 1차 함수로 표시하였고, CO₂는 온도에 대하여 각각 2차와 3차의 실험식으로 표시하였다. 점도는 온도에 대한 지수함수로 표시하였다. 이들 실험식을 이용하여 단일 성분일 때의 상태를 알 수 있다. Inert gases, Ar, N₂, CO₂, as a Halon alternative, the empirical equations were correlated in terms of saturated pressure, density and viscosity. They were obtained by regression analysis from the experimental data in the literature. The empirical equations of saturated pressure were expressed as the second and third order function of temperature. The empirical equation for Ar and N₂ of density were expressed as the first order function of temperature. And CO₂ was expressed as the second and third order function of temperature. The empirical equation of viscosity was formulated as a power function with temperature. This empirical equations would allow us to predict pure component state.

中小企業 情報 system의 構築方案

金學凡,秋再鎬,呂聖九,黃末東 慶南大學校 産業經營硏究所 1988 産業經營 Vol.11 No.-

여호와의 증인 환자에서 산과적 출혈 후 무수혈 치료 2예

김재령,여소진,이해혁,김정식,김태희,남계현,이권해,이임순,박진화,황경호 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Jehovah's Witness comprise a unique obstetric population. Their refusal of blood stems from an interpretation of a literal translation of the Bible, and it is this belief that puts them at an increased risk of morbidity and mortality if hemorrhage occurs. We report two cases of a Jehovah's Witness who bled massively due to obstetric hemorrhage, refused blood transfusion and had profound anemia. The patients were treated with recombinant human erythropoietin, parenteral iron and oxygen. And they were treated on an intensive care unit with intermittent positive pressure ventilation. We reviewed with literature considering the therapy for acutely anemic patients who refuse transfusion to decrease the duration of the most severe anemia.

공생진화 알고리듬에서의 공생파트너 선택전략 분석

김재윤,김여근,신태호 한국경영과학회 2000 韓國經營科學會誌 Vol.25 No.4

Symbiotic evolutionary algorithms, also called cooperative coevolutionary algorithms, are stochastic search algorithms that imitate the biological coevolution process through symblotic interactions. In the algorithms, the fitness evaluation of an individual requires first selecting symblotic partners of the individual. Several partner selection strategies are provided. The goal of this study is to analyze how much partnering strategies can influence the performance of the algorithms. With two types of test-bed problems: the NKC model and the binary string covering problem, extensive experiments are carried out to compare the performance of partnering strategies, using the analysis of variance. The experimental results indicate that there does not exist statistically significant difference in their performance.

자기연마를 이용한 STS304 파이프 내면의 초정밀 가공

김희남,윤여권,심재환 한국산업안전학회 2002 한국안전학회지 Vol.17 No.3

The magnetic abrasive polishing is the useful method to finish using magnetic power of a magnet. It's not a long time this method was introduced to korea as one of precision finishing techniques. The magnetic abrasive polishing method is not so common for machine that it is not spreaded widely. There are rarely researcher in this field because of non-effectiveness of magnetic abrasive. The mechanism of this R&D is dealing with the dynamic state of magnet-abrasive. This paper deals with mediocritizing magnetic polishing device into regular lathe and this experiment was conducted in order to get the best surface roughness at low cost. We need to continue the research on it. This paper contains the result of experiment to acquire the best surface roughness, not using the high-cost polishing material in processing. The average diameters of magnetic abrasive are the particles of 150㎛, 250㎛.

대체 소화제의 열역학적 물성 비교

김재덕,여미순,이광진,이윤우,장윤호,노경호 한국화재소방학회 2004 한국화재소방학회논문지 Vol.18 No.1

몬트리올 의정서에 의해서 규제받는 CFCs와 Halon의 대체 물질인 HFC-23, HFC-125, HFC-227ea, HFC-236fa와 불활성 화합물 Ar, N₂, CO₂의 열역학적 물성인 포화압력, 밀도, 엔탈피, 점도를 비교하였다. 본 연구에서는 소화제의 물성을 문헌값을 온도의 함수로서 표시하였다. HFC화합물의 열역학적 물성은 Halon-1301과 비슷하게 나타내었다. 불활성 화합물은 주로 혼합물로 이용되지만, 불활성 화합물의 물성은 Halon-13O1에 비하며 바람직하지 않았다. For CFCs and Halons regulated by Montreal Protocol and their alternatives of HFC-23, HFC-125, HFC-227ea, HFC-236fa and the mixtures of inert gases of Ar, N₂ and CO₂, the thermodynamic properties of saturated pressure, density, enthalpy and viscosity were compared. In this study, the data from literature were expressed as a function of temperature. Thermodynamic properties of HFC compounds were similar to those of Halon-1301. Inert gas was mainly used as a mixture, but the physical properties of the inert gas does not have the favorable advantages over those of Halon-1301.