일부 남성 금속제품 조립작업자들의 피로에 영향을 미치는 작업관련요인

장준호,강동묵,고상백,김정원,조병만,이수일 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.2

목적 : 남성 금속제품 조립 작업자들의 피로에 영향을 미치는 작업관련요인을 파악하고자 한다. 방법 : 작업자의 일반적 특성 및 작업관련 특성, 육체적 부하, 직무 스트레스 등을 조사 항목으로 하여 자동차 부품 조립업 1개소(476명), 자동차 엔진 조립업 1개소(610명), 대형 선박 엔진 조립업 1개소(454명)의 작업자(1,540명)를 대상으로 수거된 설문지 중 부실하게 응답한 38부를 제외한 1,136부(총연구대상의 73.8%)를 분석하였고, 피로도와의 연관성을 다중선형회귀분석으로 살펴보았다. 조사는 자기 기입식 설문지를 사용하였다. 육체적 부하를 측정하기 위해서는 Borg의 scale이 사용되었다. 격무 스트레스를 측정하기 위해서는 Karasek의 Job content questionnaire가 사용되었다. 피로의 측정은 전반적 피로도(sum of fatigue), 일상생활 기능장애(daily dysfunctioning), 상황적 피로(situational fatigue), 피로점수의 총합(sum of fatigue)으로 구성되어 있는 다면적 피로척도를 사용하였다. 피로점수의 분포는 본 연구에 응답한 피로점수의 총합을 사분위수로 나누어서 4등급으로 나누었다. 결과 : 피로점수의 분포는 피로점수의 총합을 사분위수로 나누었을 때, 0≤1등급≤73, 74≤2등급≤82, 83≤3등급≤93, 94≤4등급≤133이었다. 다중선형회귀분석에서 피로점수의 총합과 유의한 관계를 보인 경우는 주간근무, 긴 주당 노동시간, 높은 육체적 부하, 높은 직무요구도, 낮은 직무자율성, 낮은 상사의 지지 등이었고, 전반적 피로도와 유의한 관계를 보인 경우는 주간근무, 높은 육체적 부하, 높은 직무요구도, 낮은 직무자율성, 낮은 상사의 지지 등이었다. 일상생활 기능장애와 유의한 관계를 보인 경우는 주간근무, 긴 주당 노동시간, 높은 육체적 부하, 낮은 직무자율성 등이었다. 상황적 피로와 유의한 관계를 보인 경우는 높은 연령, 주간근무, 긴 주당 노동시간, 낮은 직무자율성 등이었다. 결론 : 피로관련 요인은 긴 주당노동시간, 높은 직무요구도, 높은 육체적 부하, 낮은 직무자율성, 낮은 상사의 지지로 생각된다. Objectives: To find work related factors affecting perceived fatigue among male metal product assemblers. Methods: The study subjects were metal product assemblers from three metal product companies (476 car parts assemblers, 610 car engine assemblers, 454 ship engine assemblers). From the total of 1,540 subjects, 1,136 (73.8%) were included and 38 respondents with insufficient replies were excluded. Associations between fatigue score and other variables (general characteristics, job related factors, workload, job stresses) were investigated in terms of the concept of multidimensional fatigue construct by self administered questionnaire. Using MFS (Multidimensional Fatigue Scale), JCQ (Job Content Questionnaire), and Borg's scale, we estimated the fatigue, job stress, and workload, respectively. Fatigue score was estimated by 'sum of fatigue' in MFS. Associations were tested by linear regression analysis using SAS v.8.0. Results: In this study, the fatigue related factors were older age, longer working hours per week, higher workload, higher job demand, lower decision latitude, and lower supervisor support. Conclusions: Prolonged working hours, higher workload, higher job demand, poor supervisor support and lower decision latitude were fatigue related factors among the male metal product assemblers of this study.

고전동경분포함수의일반론에대하여(제3부)

장광수,안준,박병도 嶺南大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.12 No.-

This is a further study subsequent to the authors previous study(Part Ⅰ and Part Ⅱ). In this study, we are concerned with obtaining the characteristics of the function f and, then, showing the theoretical g curve.

20주간의 혼합운동프로그램이 정신지체 성인의 신체조성과 체력에 미치는 효과

전종귀,염동삼,조병준,이상기,박희근,한동수,장학영 한국특수체육학회 2004 한국특수체육학회지 Vol.12 No.3

The purpose of this study was to figure out the effects of participation in a combined exercise program on the body composition and physical fitness of adults with mental retardation. Fifteen adults with mental retardation in a special institute took part in aerobic and strength , combined exercise at 55 - 69%HRmax at least one hour a day, 3 times a week for 20 weeks. The body composition and physical fitness profiles of subjects were measured before and after training period, respectively. Dependent t-test was used to analyze the statistical significance. The results were as follows; First, participants showed more favorable % body fat, lean body mass, fat mass, WHR after training. Second, participants showed more improved upper body strength and balance after training. The findings imply that the combined exercise program for long duration had significant effects on the health promotion of adults with mental retardation.

Cs-137 γ-선 조사장치의 방사선장 해석연구

전재식,채하석,이철영,오장진,이병영,명동범 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1

In reference to the ISO-4037 and ANSI N13.11, appropriateness of the shielding and collimating system, and suitability of the irradiation and its environmental conditions of a 20 Ci Cs-137 gamma-ray irradiator installed in Korea Institute of Nuclear Safety(KINS) were investigated. Upon the installation of the irradiator, condition of collimator alignment and virtual beam cross section were examined by use of a portable He-Ne laser. In order to evaluate the fitness of the secondary(scattered) to primary ratio of the collimated gamma-ray beam from the irradiator in light of ISO and ANSI requirement, the measurements of the secondary to primary ratio were performed by use of a cavity type ion chamber which had been calibrated in a calibration laboratory that maintains reliable traceability. For the theoretical assessment of the gamma-ray field the collimated beam were divided into fifteen sectors and for each sector the secondary to primary ratio and the gamma-ray spectrum was simulated by means of Monte Carlo method. The outcomes were compared with the experimental results, and cause of scattering and the existence of alleged modifying factors in the irradiator were examined.

말뚝으로 보강된 탄성지반상에 놓여 있는 연속기초의 해석

장준환,신수곤,장병순 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

지반이 다소 연약하여 건물 기초를 말뚝으로 보강된 연속줄기초로 설계할 경우, 탄성지반을 무시하고, 말뚝을 탄성지점으로 한 연속보로 처리하는 것이 보통이다. 그러나 실제 기초에서는 지반반력과 말뚝반력을 모두 무시할 수 없는 경우가 많다. 본 논문은 지반반력과 말뚝반력을 동시에 고려하고 n경간의 탄성지점을 가지는 탄성지반상의 보에 대한 해석을 반무한장보와 유한장보로 구분하여 계시하고, 하중 재하위치에 따라 반무한장보 및 유한장보로 해석해야 할 범위를 제시하였다 In this paper, the method of analysis for the girder supported with piles on the elastic soilmedium is proposed. The girder supports with piles on the elastic soil medium is often used as those of crane rail at a ship yard. For the purpose of practical design, these girders were often regarded as continuous beams elastically supported with piles. Actually, the method of ana1ysis for these girders should be considered as analysis of girder supported with piles on the elastic soil medium. From the proposed method, we can calculate bending moment and shearing force of these girders, after obtaining the reaction of piles by calculating the deflection of pile support point due to external load and pile reaction.

암 환자의 혈장 Transforming Growth Factor-β1 농도

박병규,하우송,이시은,이수진,박순태,박찬후,전지현,장정순 THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCINE 1999 Journal of biomedical laboratory sciences Vol.5 No.2

한국인의 대표적인 성인 고형 종양인 위암, 간암, 유방암과 소아 백혈병 및 2종의 소아 고형 종양 환자로부터 혈장 transforming growth factor-ß1 (TGF-ß1) 농도를 sandwich ELISA 분석법을 이용해 측정함으로써 TGF-ß1을 이 질환들에 대한 새로운 종양표지자 (tumor marker)로 사용할 수 있는지 검토하였다. 또한 연령 및 성별에 따른 혈장 TGF-ß1 농도의 정상치를 조사하였다. 신생아에서 70대까지 혈장 TGF-ß1 농도의 차이는 없었고 남녀간의 차이도 없었다. 위암 환자의 혈장TCF-ß1 농도는 16.0±6.8 ng/ml (평균 ±표준편차)로 정상 대조군의 TGF-ß1 농도 (8.3 ±5.0 ng/ml) 보다 유의하게 높았으나 간암, 유방암 환자의 혈장 TGF-ß1 농도는 대조군과 차이가 없었다. 그리고 위암 환자 16명, 간암 환자 8명, 유방암 환자 7명 중 각각 7명 (43.7%), 1명 (12.5%), 1명 (14.3%)에서만 혈장 TGF-ß1 농도가 증가되었다. 5명의 소아 백혈병 환자에서는 관해 (remission) 여부와 상관없이 혈장 TGF-ßl 농도가 모두 정상 범위에 있었으나 2명의 소아 고형암 환자에서는 종양 절제 전에는 혈장TGF-ß1 농도가 높았다가 절제 후 정상으로 떨어졌다. 결론적으로 1)정상인의 혈장 TGF-ßl 농도는 연령 및 성별에 따른 차이가 없다는 것을 알 수 있었고, 2)성인 고형암인 위암, 간암, 유방암에서는 낮은 민감도로 인해 TGF-ß1을 진단을 위한 선별 검사로 이용하기에는 부적절한 것으로 판단되었으며, 3) 정상 대조군보다 혈장 TGF-ß1 농도가 높았던 위암 환자와 종양 절제 전후로 혈장 TGF-ß1 농도가 민감하게 변했던 소아 고형 암 환자에 대해서는 향후 표본 수를 늘려 부가적인 연구를 해 야 할 것으로 사료된다. To evaluate the usefulness of transforming growth factor-ß1 (TGF-ß1)as a new tumor marker, we determined the plasma TGF-ß1 levels using sandwich ELISA assay in cancer patients. Patients with three most common adult cancers in Korea (stomach, liver and breast cancer) and children's cancers (leukemia and two kinds of solid tumor) were enrolled for the study. Furthermore, 39 individuals were subjected to age and sex-stratified plasma TGF-ß1 analysis. No statistical difference was demonstrated with respect to age or sex. The mean plasma TGF-ß1 level (16.0 ng/ml) of stomach cancer patients was significantly higher than that (8.3ng/ml) of controls. However, there was no difference among the mean plasma TGF-ß1 levels of liver, breast cancer patients and controls. Seven of 16 patients (43.7%) with stomach cancer, one of 8 (12.5%) with liver cancer, and one of 7 (14.3%) with breast cancer showed higher TGF-ß1 levels compared to controls. Plasma TGF-ß1 concentrations of five leukemic children remained in the normal range regardless of the remission state. In contrast, initial high TGF-ß1 levels from two children with solid tumors returned to normal range on surgical resection of tumors. From the above results, we could conclude that plasma TGF-ß1 levels of apparently healthy individuals seem to be rather constant irrespective of difference in age or sex, and the plasma TGF-ß1 has the limited value as a screening test for the diagnosis of aforementioned adult cancers because of its low sensitivity. Finally, additional studies need to be pursed for the large number of stomach cancer and pediatric solid tumor patients in order to reach a secure conclusion on the usefulness of plasma TGF-ß1 as a tumor marker in these patients.

殘留應力을 考慮한 鎔接材의 疲勞龜裂 進展擧動에 關한 硏究

최병기,이을호,국중민,기준호,임선빈,정장만 朝鮮大學校 機械技術硏究所 2000 機械技術硏究 Vol.3 No.1

The effect of welding residual stress on the initiation and propagation of fatigue crack is investigated so as to study the fatigue behavior in welding residual stress field. Especially, the relation between welding residual stress and fatigue crack opening behavior is investigated and the redistribution of residual stress as a fatigue crack propagates is examined. Following results are obtained. 1) In case of the load range is constant, as the stress ratio is changing to 0.1, 0.33, 0.5 the propagation life is constant but the growth life decreases. And than, when maximum load or minimum load is constant, as the stress ratio increases the growth life and propagation life increase. 2) The fatigue crack propagations rate da/dN appears to accelerate when the stress intensity factor range ΔK is less than 15MPa-m^1/2. 3) The residual stress that is appeared by welding decreases after cutting. 4) Fatigue crack propagation ratio is affected by tensional and compressible residual stress at the initial time, but it's similar to the original in the more than 20mm of crack length.

고전동경분포함수의일반론에대하여(제2부)

안준,장광수,박병도 嶺南大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.12 No.-

In this paper, as a further study subsequent to the previous study(Part I), we are concerned wuth obtaining the n-th order approximation solution to the classical radial distribution function which satisfies the differential equation. In conclusion, we believe that the infinite number of iteration would be give the exact g function.

방사선치료 조사영역 내에 발생한 설암 환자에서 입체조형방사선치료 경험 : 증례보고

조문준,장지영,김기환,김병국,송창준,김준상,김재성 충남대학교 암연구소 2003 암연구소 업적집 Vol.3 No.-

Objectives : We report an interim result of conformal radiotherapy in a patient with early stage cancer at the base of the tongue, which developed in a previously irradiated area. Materials and Methods : A 64-year-old male patient was diagnosed with T4NOMO supraglottic cancer. He received 72Gy of radiation therapy from 21 November 1988 to 24 February 1989. He had local failure and underwent a salvage total laryngectomy on 28 August 1989. Subsequently, he did well. In early 1999, he suffered from throat pain. He had a 2.5cm ulcerative mass at the base of his tongue, in the area that had been irradiated previously. Biopsy showed squamous cell carcinoma. After workup, he was diagnosed with base of tongue cancer with T2NOMO. Surgery was not feasible because the morbidity was not acceptable. Since it was difficult to re-irradiate the area with a curable dose using conventional 2D radiation therapy with an acceptable morbidity, we decided to try conformal radiotherapy. We used 7 static beam ports with field sizes from 7×6.4 to 8×8㎠, using 6 and 10MV photons. The fractionation regimen was 1.8Gy, 5 times per week. He received 64.8Gy in 36 fractions from 9 April 1999 to 1 June 1999. Results : In the 21 months since radiotherapy, the patient has not experienced any acute or chronic complications, such as xerostomia. He experienced relief of pain shortly after the start of radiotherapy, showed a complete response, and is still doing well. Conclusion : Conformal radiotherapy can be used to treat cancer that develops within a previously irradiated field, with curative intent.

대장내시경검사에서 비특이적 염증형태로 나타난 대장선암 1예

박재현,장병익,이호찬,김성준,박준석 영남대학교 의과대학 2009 Yeungnam University Journal of Medicine Vol.26 No.2

Colon cancer is the second most common malignancy in Korea. It is classified as superficial type, the mass type, the ulcerative type, the ulceroinfiltrative type, the diffuse infiltrative type and the unclassified type according to the colonoscopic findings. We report here on a case of colon cancer that was initially misdiagnosed as acute infectious colitis at the initial presentation. A 64-year-old man visited to Yeungnam University Hospital for watery diarrhea and lower abdominal pain. Colonoscopy revealed long segmental edematous mucosa and hyperemic mucosa with stenosis in the transverse colon. He was diagnosed as having acute infectious colitis according to the colonoscopic finding. However, two days later after colonoscopy, he visited the emergency room for hematochezia. We performed computerized tomography (CT) and obtained blood samples to find the origin of the bleeding. We found thickening of the transverse colon lumen and ascites on the CT finding and an elevated level of tumor markers; we also obtained the results of the colonoscopic biopsy that was done via colonoscopy. He was finally diagnosed as having colon cancer with carcinomatosis, a poorly differentiated adenocarcinoma.