PGA에 대한 면진받침의 손상도 해석 연구

김종인,김종윤,김태형 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1

Nowadays, The number of occurrence of earthquakes has increased and accordingly the damage caused by earthquake has also increased around the world. Because it is difficult for earthquakes to be predicted in advance and earthquakes often occur concurrently, the needs for the study on the effects of earthquake was increased. Probability theory accumulated during a long time enables engineers to deal with uncertainties of structure quantitatively and to judge stability of structure reasonably. Existing method calculates uncertainties by applying safety factors but the method cannot consider the safety of structures quantitatively. When various stages of structural damage are considered, if the number of uncertainties are many, then a method is needed for assessing vulnerability and damage state appropriately. This study aims not only to present the way for finding fragility curve of structures by using universal structural analysis program and general probability density function but also to compare seismic isolation performance.

임신 종결 후 발생한 자궁 동정맥 누공에서 자궁동맥색전술로 치료한 1예

김종민,이해혁,김태희,남계현,심일구,이권해,김형문,이임순,장종호 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Arteriovenous fistula of uterus is rarely reported disease. This vascular malformation is very dangerous condition because Dilatation & curettage can cause massive uterine bleeding without accurate diagnosis. The diagnosis is made by angiography, gray scale ultrasonography, color and duplex doppler ultrasonography, computed tomography, and magnetic resonance imaging is helpful. Especially color and duplex doppler ultrasonography is allows convincing detection and diagnosis of arteriovenous fistula. Recently transcatheter uterine artery embolization is treatment of choice. We have experienced a case of arteriovenous fistula of uterus. Which is presented with a brief review of literature.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

PGA에 의한 교량의 손상도 곡선

김종인,이수철,김태형 대구대학교 산업기술연구소 2003 産業技術硏究 Vol.15 No.1

In performing a risk analysis of structure for earthquake, it is imperative to identify the vulnerability of structures associated with various stages of damage. And the earthquake resisting capability is needed for structures like bridge. So the damage analysis of bridges with or without isolator for earthquake effects is necessary. In this paper, the method for construction of fragility curve is presented. In doing that. general purpose structural analysis program and generally used probability density function are used. The results of structural analysis are represented by Bernoulli distribution which says damage or no damage. By the use of Maximum Likelihood Method. two parameters of lognormal distribution -median and standard deviation - are found. With them, the fragility curves are constructed. In this paper, the fragility curves of bridge are constructed with respect to PGA(Peak Ground Acceleration). The results of this study are as follows: (1) As the result according to research, we got the Fragility Curve to have median and standard deviation as 0.242 0.262 respectively. (2) For PGA, the fragility curve is distributed on relatively wide range of PGA. So it can be a good measure for evaluation of damage effect with respect to PGA.

공시체 크기변화에 따른 풍화토의 전단강도특성

김형주,최종규 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

A weathered granite soil is a very complex particle composition formed with by weathered justice and it was also spread variety. Thus, it was judged that Specimen it one's so small to rule shear stress by direct shear test. This study's purpose want to exactly know slope stability integer of Weathered Granite Soil compare with natural Quantity and comparative problems according with small sample by small direct shear test in domestic, as collapsed weathered granite soil was happen in Ocsan area, to know sherr strength by specimen size to have the large shear test (300×300mm), (Reformation Shear Test)(D=75mm) and (Direct Shear test)(D=60mm) under same clause. As shear transformation, the large shear test happen binding lord at 0.4kgf/cm², 0.8kgf/cm² in interlocking, it is expanded by dilatancy. But, in shear test of another specimen, particle do cultivation rule to de compression. Such like a Developing, it effect to shear strength so the large shear test show more big one a shear strength. Specimen size is smaller, shear contact face rate down, it relevant with stress error and specimen size bigger, show shear strength up. Therefore, in actual applying, when do execute slope stability grade and design, multiple negotiation do for easy multiple public apply of gravel, send better, and it is known to seem to be idealize, this study is particle to be refer a shear strength as refastening

러시아 한국학 진흥을 위한 전문 교재의 필요성과 개발의 방향 : 언어학과 문학 교재를 중심으로

김형규,장호종 中韓人文科學硏究會 2008 한중인문학연구 Vol.24 No.-

러시아 한국어교육 및 한국학은 학문 내적, 외적인 기반이 취약해 최근 증가 추세에 있는 한국학의 수요를 체계적으로 수용하지 못하고 있어 국내 한국학계와의 긴밀한 상호협조가 절실한 실정이다. 동기와 목적, 그리고 주체를 포함한 전반적인 환경이 달라졌음에도 불구하고 러시아 한국어교육은 취업을 중심으로 한 실용적인 목적에 치중되어 장기적인 차원에서 러시아 한국학의 전문성을 제고하기 어렵다. 따라서 양적으로 증가한 한국어교육 및 한국학 강좌의 많은 부분을 비전문 인력에 의존하고 있는 상황이 반복되고 있으며, 교재 개발이나 교육과정 또한 주로 일회적이고 산발적으로 차원에서 이루어지고 있다. 장기적인 차원에서 러시아 한국학의 전문성을 제고할 수 있는 실질적인 교류 협력 과정을 통해 러시아 한국학의 질적인 전환을 뒷받침하고 이를 통해 러시아 한국학의 내적 기반을 강화하는 데 기여하기 위해 한국학 전문 교재의 개발이 필요하다. 한국학 전문 교재는 회화 습득이라는 초보적, 실용적 목적을 넘어서 의사소통 능력을 고급화하고 한국문화에 대한 이해를 심화시키는 방향으로 발전시킬 수 있어야 하며, 한국문학, 역사, 사회, 경제 등을 전공하는 한국 전문가 양성의 토대를 확대하는데 기여해야 할 것이다. 또한 러시아 한국학의 질적인 전환을 위해서는 체계적이고 장기적인 계획을 바탕으로 한 실질적인 협력 관계를 구축해야 할 필요가 있다. 그리고 이러한 협력 관계는 러시아 한국학 자체의 전문성을 강화하는, 러시아 한국학의 체질을 개선하여 연구 및 교육 시스템을 안정적으로 구축하는 방향으로 이루어져야 한다. 이를 위하여 러시아 현지의 문화적 특성 및 교육환경을 반영할 수 있도록 러시아와 한국 학자 및 교육기관과의 실질적인 협력 시스템을 구축하여 한국학의 전문적 지식을 체계적으로 구성하는 것이 시급하다. Enhancing academic foundation of Koreanology overseas as well as meeting various demands of Korean language education require organic cooperation with Koreanology field in Korea. Specific situations in each region and accomplishments by each sector should be harmoniously communicated for stable and long-term development of Koreanology overseas and ultimately for promoting recognition of Koreanology throughout the world. Attention and effort from domestic Koreanology field are much needed considering demand of Koreanology and Korean language are increasing among countries with relatively weak academic foundation. Russia also has weak academic foundation on which demand of Koreanology is not systematically managed; therefore close mutual cooperation with Koreanology field in Korea is needed. Koreanology in Russia focuses more on practical purposes in which Korean language education is for job opportunities, despite the change in overall environment including objects, goals and core of Koreanology; therefore it is hard to consider specificity of Koreanology in Russia from long-term perspective. This situation led to growing dependency on non-professionals for major part of increasing Korean language education courses and Koreanology classes and majority of teaching material developments and education processes are not continuous and consistent but sporadic. In long-term perspective, development of specialized teaching materials for Koreanology is needed to enhance the internal foundation of Koreanology in Russia through practical cooperation process and change in quality of Koreanology for specificity of Koreanology in Russia. Specialized teaching materials for Koreanology should help with more sophisticated communication skills beyond beginner level communication skill and practical purposes; promote further understanding on Korean culture; and contribute to expanding foundation to train experts of Korea in Korean literature, history, society and economy. In addition, practical cooperation based on systematic long-term plan is needed to change the quality of Koreanology in Russia. Such cooperative relationship should be able to enhance specificity of Koreanology in Russia, improve the quality of Koreanology and establish stable research and education system within Russia. Practical cooperative system among scholars and educational organizations in Russia and Korea should be established to systematically organize specialized knowledge of Koreanology.

역공학 기술을 이용한 스크류 유량계 개발 및 성능평가에 관한 연구

김형일,황종대,정윤교 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.2

This research presents a modeling and a manufacturing method of screw flow meter. This paper introduces the efficient design and manufacturing method of screw type flow meter using reverse engineering and test technology. The methods introduced this paper utilize the reverse engineering that is increasing accuracy of modeling and manufacturing of reverse model. And then it can be used in performance test with hydraulic test equipment. Hence this can be used in the basic document for development of the quite accurate flowmeter.

전자토모그래피의 정량적 분석에서 대물렌즈 조리개의 영향

김진규,이상희,권희석,정종만,정원구,이수정,주형태,김윤중 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.4

Electron tomography의 정량적 분석을 위해서 대물렌즈 조리개가 투과빔의 강도에 미치는 영향을 평가하였다. Electron tomography에 도입되는 Beer’s law의 올바른 적용을 위해서는 투과빔은 시료의 기울기에 따른 mass thickness의 변화에 의한 효과만을 반영해야 한다. 그러므로 빔 경로상의 대물렌즈 조리개, 홀더 등에 의한 다른 효과는 제거되어야 한다. 본 연구에서는 대물렌즈 조리개의 cut-off 효과를 120 kV TEM과 Quantifoil holey 카본 시료를 이용하여 상세히 평가하였다. 대물렌즈 조리개를 사용하지 않은 경우와 비교할 때, 30 μm 크기의 대물렌즈 조리개를 통과한 투과전자빔의 강도는 약 16.7%의 감소가 일어난다. 또한 55˚이상의 고경사각 기울기에서는 대물렌즈 조리개의 cut-off 효과에 의해 14.2%의 강도 감소가 추가적으로 발생함을 알 수 있었다. Electron tomography에서 정량적 분석을 위해서는 이러한 대물렌즈 조리개의 영향을 고려해야만 한다. 또한 Beer’s law의 올바른 적용을 위해서는 일련의 기울기에 따른 2차원적 영상은 가능하면 대물렌즈 조리개를 사용하지 않은 상태에서 획득하는 것이 바람직하다. We have evaluated the effects of experimental factors on transmitted electron beam intensities for quantitative analysis in electron tomography. For the correct application of Beer’s law in electron tomography, the transmitted beam intensity should reflect the net effect of mass properties on beam path. So, the any other effects of the objective aperture and the specimen holder on beam path should be removed. The cut-off effects of objective aperture were examined using Quantifoil holey carbon film and a transmission electron microscope operated at 120 kV. The transmitted beam intensities with 30 μm objective aperture dropped about 16.7% compared to electron beam intensities without the objective aperture. Also, the additional losses of about 14.2% at high tilt angles were occurred by cut-off effects of the objective apertures. For the precise quantitative analysis in electron tomography, the effect of the objective aperture on transmitted electron beam intensities should be considered. It is desirable that 2-D tilt series images are obtained without the objective aperture for correct application of Bee’s law.

연 폭로가 남성호르몬에 미치는 영향

김형수,장성훈,이원진,최재욱,박종태,백남원,김록호 大韓産業醫學會 2001 대한직업환경의학회지 Vol.13 No.1

목 적 : 본 연구는 직업성 연 폭로근로자에서 연폭로가 남성 생식기계 독성중 성호르몬에 미치는 영향과 그 정도를 평가하고자 시도되었다.방 법 1998년 하반기에 실시한 일반, 특수건강진단자중 경기도 지역 직업성 연 폭로 근로자 33명과 과거 직업력에서 연 폭로가 없었던 사무직 근로자 33명을 연구대상으로 선정하였다. 연의 생물학적지표로는 혈색소, ZPP, 혈중 연, 및 요중 연을 이용하였으며, 성호르몬으로는 LH, FSH, testos-terone, SHBG 및 FTI를 이용하였다. 연 폭로 지표와 성호르몬과의 상관관계를 조사하였다. 결 과 : 연의 생물학적 지표중 혈색소는 폭로군에서 대조군보다 유의하게 낮았으며, ZPP, 혈중 연및 요중 연등은 폭로군에서 대조군보다 유의하게 높았다. 성호르몬에서 FSH, testosterone, SHBG및 FTI는 모두 폭로군에서 대조군보다 낮았으나 통계적 유의성은 없었다. 폭로군의 성호르몬중에서 연령은 FSH 및 FTI, ZPP는 FSH, 혈중 연은testosterone과 유의한 상관관계가 있었다. 대조군에서 연령은 FSH, testosterone, SHBG 및 FTI와 흡연량은 FSH와 유의한 상관관계가 있었다. 연령군별 폭로군과 대조군의 성호르몬 비교에서 30-39세군의 FTI에서 폭로군이 대조군보다 유의하게 낮았으며 그 밖의 호르몬에서는 모두 유의한 차이가 없었다. 결 론 : 연 폭로군의 FSH, Testosterone, SHBG 및 FTI가 대조군에 비교하여 낮았으나 통계적 유의성은 없었다. 그러나 폭로군에서 연의 생물학적 지표와 일부 성호르몬간에 유의한 상관관계를보였으며 이는 본 연구 대상 근로자의 연 폭로 수준이 일부 성호르몬에 영향이 있음을 보여주는 것으로 판단된다. 향후 이에 대한 지속적인 연구가 진행되어 야 할 것이다. Objectives : This study was performed to evaluate the relationship between biological markers of lead exposure and level of sex. hormones in men occupationally exposed to lead. Methods : In this study, 33 male workers who employed at smelting and battery factories were compared with 33 male workers who were not exposed to lead. As biological markers of lead exposure, hemoglobin, ZPP, blood lead and urine lead were measured. As sex hormones, FSH, LH, testosterone, SHBG and FTI were determined. Results : Hemoglobin level was significantly lower in exposed than in nonexposed group. Level of ZPP, blood lead, and urine lead were significantly higher in exposed than in nonexposed group. There was a trend that level of FSH, testosterone, SHBG, and FTI was lower in exposed than in nonexposed group respectively, but there were no statistical significance. In exposed group, FSH level was correlated with age, ZPP, and blood lead; testosterone level was correlated with hemoglobin, blood lead, urine lead, and SHBG ; and FTI level was correlated with age. Conclusions : Level of some sex hormones were lower in exposed than in nonexposed group but there were no statistical significance between the exposed and the nonexposed group. But level of sex hormones were correlated with several biological markers of lead in exposed group. It suggests that occupational lead exposure might affect sex hormones.

急性精神分裂障碍患者의 Haloperidol 治療時 臨床 好轉度와 血中 Prolactin 濃度의 關係

김성윤,주진형,우종인 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.2

저자들은 혈청 PRL농도가 급성 정신증에서의 haloperidol의 치료 반응에 대한 지표로서 임상적으로 이용가능한가를 규명하기 위하여 22명(남자 4, 여자 7)의 초발 정신분열양장애 환자들을 대상으로 하여 이 중 10명의 남자 환자군에 대해서는 11명의 남자 대조군과 기저 혈청 PRL치의 비교를 하였고 경구 haloperidol 치료를 받은 11명(남자 4, 여자 7)에 대해서는 치료전과 4주째의 혈청 PRL치와 haloperidol의 혈중 농도를 측정하고 동시에 Positive and Negative Syndrome Scale(PANSS)로 정신병리를 평가하였다. 결과는 다음과 같다. 1) 남자 환자군 10명의 치료전 혈청 PRL치는 정상 대조군의 혈청 PRL치와 유의한 차이를 보이지 않았다. 환자군에서 치료 개시전 PANSS로 측정한 정신상태 중 음성증상 subscale만이 혈청 PRL치와 유의한 상관관계(r=0.6636, p<0.05)를 보였다. 2) 4주간의 치료후 PANSS 점수 변화율은 기초 및 4주째의 혈청 PRL치와 유의한 상관관계를 보이지 않았고 PRL치의 변화율 및 변화치와도 유의한 상관관계를 보이지 않았다. 3) 4주간의 HALOPERIDOL 치료를 통해 PANSS 전체 점수는 유의한 감소를 보였으며(p<0.05), 양성증상(p<0.05)과 일반정신병리(p<0.05) subscale 점수상에서도 유의한 감소를 보였다. 혈청 PRL치도 기초 측정치에 비하여 4주째 혈청 PRL치, PRL치의 변화율 또는 변화치와 통계적으로 유의한 상관관계를 보이지 않았다. Objects : The authors investigated to evaluated the clinical utillity of serum prolactin(PRL) level as a therapeutic index of haloperidol treatment for acute psychotic patients. Methods : 22 patients(10 males, 12 females) first-onset schizophreniform disorder were studied. Among them 10 male patients' baseline PRL levels were compared to those of 11 agematched male volunteers and 11 patients who were treated with oral haloperidol(4 males, 7 females) were studied by measuring baseline and 4the week levels of serum PRL and haloperidol and administering Positive and Negative Syndrome Scale(PANSS) concurrently. Results : 1) The serum PRL level of 10 male patients showed no statistical difference from 11 healthy males. Only the patients' pre-treatment PANSS negative subscale score had significant correlation with the baseline serum PRL level. 2) Percentage of PANSS score change didn't show significant correlation with the baseline and 4th-week serum PRL level nor with amount and percentage of serum PRL level change. 3) The total PANSS score decreased significantly after 4 week treatment with haloperidol s well as positive symptoms subscale and general psychopathology(all, p<0.05), and 4th-week serum PRL level significantly increased(p<0.01) compared with the baseline. 4) The 4th-weeks plasma haloperidol level didn't show correlation with serum PRL level nor with amount and percentage of serum PRL level change. Conclusions : The findings suggest that serum PRL level has limitation for use as therapeutic index of haloperidol treatment for acute psychotic patients.