고리뼈를 이용한 한국인의 성별판별

박대균(Dae-Kyoon Park),라종주(Jong-Joo Ra),박경호(Kyung-Ho Park),고정식(Jeong-Sik Ko),김덕임(Deog-Im Kim),김이석(Yi-Suk Kim),이우영(U-Young Lee),정인혁(In-Hyuk Chung),한승호(Seung-Ho Han) 대한체질인류학회 2009 해부·생물인류학 (Anat Biol Anthropol) Vol.22 No.3

법의인류학자가 개인식별항목(biological profile)을 추정할 때, 사망이전 정보를 알고 있는 뼈표본을 이용하여 규명한 통계학적 자료를 활용한다. 외국의 경우 정해진 인구집단을 대상으로 체질인류학적 방법으로 연구한 통계학적 자료가 존재하기 때문에 개인식별항목을 추정할 수 있는 가능성이 높다. 그런데 한국인의 경우 사망이전 정보를 알고 있는 뼈표본이 거의 없기 때문에 개인식별항목을 추정하기 위한 통계학적 자료가 부족하다. 이 연구에서는 사망이전 정보를 알고 있는 뼈표본에서 고리뼈(atlas)를 계측하여 한국인의 성별을 추정할 수 있는지 조사하였다. 순천향대학교 의과대학 해부학교실과 연세대학교 의과대학 해부학교실에 보관 중인 고리뼈 43개(남성 25개, 여성 18개)를 계측하였다. 디지털밀림자를 이용하여 고리뼈 계측항목들을 계측하였고, 컴퓨터 통계프로그램을 이용하여 성별판별함수와 그 함수의 정확도를 계산하였다. 21개의 고리뼈 계측항목들 중에서 고리뼈너비(width of atlas)가 성별을 추정하는 데 매우 유용하였다. 성별판별함수에 각 항목들을 단독으로 적용한 결과에서 정확도가 65% 이상 높게 나타난 항목은 6개였고, 이 6개 항목을 조합하여 계산한 성별판별함수의 정확도는 93.9%였다. 한편 모든 항목을 단계별로 적용한 성별판별함수의 정확도는 97%였다. 성별을 추정하기 위한 뼈대의 계측학적 연구는 주로 머리뼈나 골반을 이루는 뼈에서 집중되어 수행되었으며, 머리뼈와 관절을 이루는 뼈대인 고리뼈를 이용한 성별판별 연구는 많지 않다. 이번 연구의 결과로 한국인에서 고리뼈는 성별의 차이를 나타내므로 한국인의 개인식별항목을 추정하는 데 활용될 수 있을 것으로 기대된다. When forensic anthropologists tried to reconstruct the biological profile, they would rely on the statistical data of documented human osteological/anatomical specimens. However, the metric data of Korean ancestry which is suitable for determining sex has not been established because documented human skeletal specimens are lack in Korean. The aim of this study is to discuss the possibility of determination of sex by metric data of atlas in Koreans. We measured 43 (male 25 and female 18) atlas from the department of anatomy, College of Medicine, Soonchunhyang University and the department of anatomy, Yonsei University College of Medicine. We measured 21 measurements of atlas using digimatic caliper and performed statistic analysis using SPSS to establish the discriminant functions. Among 21 measurements of atlas, the measurement values of the width of atlas exhibited the strongest relation with sexes. The accuracy of arbitrary discriminant functions derived from 6 measurements exhibited 93.9% and that of stepwise discriminant functions derived from 3 measurements exhibited 97.0%. In conclusion, this study could indicate that metric data of atlas is helpful to determine the sex in Koreans, but a further investigation should be followed.

펄프 몰드를 이용한 제품 설계

박대균(Park, D. G.),박재덕(Park, J. D.),김용규(Kim, Y. G.),전언찬(Jeon, E. C.) (사)한국CDE학회 2007 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2007 No.1

3D 프린팅으로 제작한 Ti-6Al-4V 재료의 Johnson-Cook 모델의 유동 응력 결정

박대균(Dae-Gyoun Park),김태호(Tae-Ho Kim),전언찬(Eon-Chan Jeon) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.4

This paper investigates the compressive deformation behavior of direct metal tooling (DMT), processing titanium alloy (Ti-6Al-4V) parts under high strain loading conditions. Split Hopkinson Pressure Bar (SHPB) experiments were performed to determine the flow stress and the coefficients of the Johnson-Cook model. This model is described as a function of strain, strain rate, and temperature. SHPB experiments were performed to characterize the deformation behavior of specimens made with 3D printers, using Ti-6Al-4V material under high temperature and dynamic loading.

철근의 연성이 소성힌지 생성에 미치는 영향

박대균(Park, Dae Gyun),조재열(Cho, Jae Yeol),박성현(Park, Sung Hyun) 한국콘크리트학회 2008 한국콘크리트학회 학술대회 논문집 Vol.2008 No.11

한국인 머리뼈의 비계측적 특징

박대균(Dae-Kyoon Park),이우영(U-Young Lee),이준현(Jun-Hyun Lee),최병영(Byoung-Young Choi),고기석(Ki-Seok Koh),김희진(Hee-Jin Kim),박선주(Sun-Joo Park),한승호(Seung-Ho Han) 대한체질인류학회 2001 대한체질인류학회지 Vol.14 No.2

한국인 머리뼈 196예를 대상으로 비계측적 특징을 알아보고 동북 아시아를 포함한 다른 18개 인구집단과 유전학적 거리를 조사하여 타민족과의 연관성을 조사하였다. 한국인 머리뼈에서 덧눈확아래구멍이 비교한 인구집단에서 가장 높은 출현빈도를 나타냈다. 꼭지고랑의 경우 조사한 한국인 머리뼈에서 왼쪽 및 오른쪽 모두 100%의 출현빈도를 나타냈으나 봉합선위에 눈확아래구멍이 있는 경우, 뒤벌집구멍이 없는 경우, 뒤뼈돌출중, 관자봉합뼈, 정수리점뼈 등은 한국인에서 관찰되지 않았다. 발산을 이용한 거리분석에서 한반도에 지정학적으로 가까운 중국이나 일본보다 중앙아시아의 카자흐인이나 몽골인들이 MMD 값이 적게 나와 상대적으로 우리와 더 가까운 친밀도를 나타냈다.

대청호 퇴적층의 미생물 분포 밀도

박동진,육연수,박대균,이상화,오희목,김창진,Park, Dong-Jin,Yuk, Youn-Su,Park, Dae-Gyun,Lee, Sang-Hwa,Oh, Hee-Mock,Kim, Chang-Jin 한국미생물학회 1998 미생물학회지 Vol.34 No.4

대청호 퇴적층에 부존하는 미생물들의 분포 양상을 알아보기 위해 대전광역시 동구 추동 대전 취수탑(정체수역) 부근과 충청북도 보은군 회남면 어성리 회남교(본류수역) 부근의 두 지점으로부터 0.5~2 cm와 19~21 cm의 두 깊이에서 장마 전(1998년 5월)과 후(1998년 8월)에 각각 퇴적토를 채집하여 세균, 방선균, 진균의 분포 밀도를 측정하였다. 조사된 모든 미생물군들은 정체수역 보다 본류수역에서 평균 3.9배 더 높게 분포하였으며, 또한 각 수역에서 세균은 장마 전후에 큰 차이가 없었으나 방선균은 장마 후에, 진균은 장마 전에 더 높게 나타났다. 그리고 미생물들의 분포 밀도는 퇴적층의 길이가 깊어짐에 따라 큰 감소를 나타내지 않았으며 오히려 일부 심층에서는 표층보다 더 높게 나타났다. 대청호 인근의 초지 지역과 비교하였을 때, 세균, 방선균, 진균의 분포 밀도는 각각 52.9%, 35%, 7%로 나타났다. 또한 대청호 접경 지점과 비교하였을 때, 세균과 방선균은 각각 1.89배 및 3.63배 더 높았으나 진균은 71.2%의 낮은 분포 수준을 나타내었다. In order to characterize the microbial distribution at sediments of Lake Daechung, soil samples were collected at two depths of 0.5~2 cm and 19~21 cm of Chudong(static) and Hoenam(streaming) site on May 18th(before rainy season) and on August 24th in 1998(after rainy season), and then the density(CFU/g soil) of microorganisms including bacteria, actinomycetes, and fungi was investigated by the viable cell counting method. Microbial density at streaming site was on the whole 3.9-fold higher than that at static site. Bacterial densities examined before and after rainy season was revealed to be similar, whereas actinomycetes and fungi exhibited higher distribution after and before rainy season, respectively. The microbial distribution was not generally reduced with the increase of depth and was rather higher at some deep sites. On comparing with the microbial densities of grass land around the lake, bacteria, actinomycetes, and fungi at lake sediments on the average showed the distribution of 52.9%, 35%, and 7%, respectively. However, their distribution except for fungi which exhibited 71.2% was mostly found to be somewhat higher than at the shore of lake.

Determination of Flow Stress and Cutting Force Prediction of Ti-6Al-4V Material for 3D Printer using S-K Constitutive Equation

Dae-Gyoun Park(박대균),Tae-Ho Kim(김태호),Eon-Chan Jeon(전언찬) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.6

Study on the Ti-6Al-4V have been carried out using cutting simulation, and researches for cutting force and chip shape prediction have been actively conducted under various conditions. However, a 3D printer application method using Ti-6Al-4V metal powder material as a high-power method has been studied for the purpose of prototyping, mold modification and product modification while lowering material removal rate. However, in the case of products / parts made of 3D printers using powder materials, problems may occur in the contact surface during tolerance management and assembly due to the degradation of the surface quality. As a result, even if a 3D printer is applied, post-processing through cutting is essential for surface quality improvement and tolerance management. In the cutting simulation, the cutting force and the chip shape were predicted based on the Johnson-Cook composition equation, but the shape of the shear type chip was not predictable. To solve this problem, we added a damaging term or strain softening term to the Johnson-Cook constitutive equation to predict chip shape. In this thesis, we applied the constant value of the S-K equations to the cutting simulation to predict the cutting force and compare with the experimental data to verify the validity of the cutting simulation and analyzed the machining characterization by considering conditions.

증례 : 순환기 ; 갑상선기능항진증 환자에서 발현한 우심부전과 변이형 협심증 1예

박혜원 ( Hye Won Park ),박대균 ( Dae Gyun Park ),박철민 ( Chul Min Park ),김성은 ( Sung Eun Kim ),이준희 ( Jun Hee Lee ),한규록 ( Kyoo Rok Han ),오동진 ( Dong Jin Oh ) 대한내과학회 2009 대한내과학회지 Vol.76 No.5

저자들은 갑상선기능항진증 환자에서 중증의 삼첨판 역류 및 폐고혈압을 동반한 우심부전증과 심실세동으로 발현한 변이형 협심증을 진단하였으며, 갑상선치료 시작 이후 삼첨판 역류 및 우심부전, 폐고혈압이 회복되는 것을 경험하여 문헌고찰과 함께 보고하는 바이다. Thyroid hormone has many effects on the heart and vascular system. Cardiovascular manifestations of excess thyroid hormone are variable, and include enhanced cardiac contractility, enhanced oxygen myocardial consumption, and reduced systemic vascular resistance. Sinus tachycardia, atrial fibrillation, heart failure, and angina pectoris are common clinical manifestations, while right heart failure without severe left heart failure is rare in patients with hyperthyroidism. In addition, ventricular fibrillation may occur in thyrotoxic patients due to myocardial ischemia, such as in variant angina. This case report describes a young woman who presented with right heart failure and variant angina, whose only concurrent illness was hyperthyroidism. The symptoms and sign of right heart failure improved on treating the hyperthyroidism. (Korean J Med 76:584-588, 2009)

정상 관동맥 조영상을 갖는 급성 심근경색증의 임상성

박승우(Seung Woo Park),박대균(Dai Gyun Park),최기준(Kee Joon Choi),권현철(Hyeon Cheol Kwon),조명찬(Myeong Chan Cho),김준수(June Soo Kim),이명묵(Myoung Mook Lee),박영배(Young Bae Park),최윤식(Yun Shik Choi),서정돈(Jung Don Seo),이영우 대한내과학회 1990 대한내과학회지 Vol.39 No.6

N/A 26 cases(12.0%) showed angiographically normal coronary artery. Among 217 cases of acute myocardial infarction(AMI), the patients with normal coronary arteriograms were younger than those with abnormal coronary arteriograms (p<0.05). There were no differences between the two groups in risk factors and tread- mill test. The incidence of non-Q wave infarction significantly increased in the group of patients with normal coronary arteriograms (p<0.005). Ejection fraction in gated blood pool scan and hemodynamic findings including cardiac index and left ventricular end diastolic pressure (LVEDP) were similar in both groups. Normal wall motion in the left ventriculogram was noticed more frequently in patients with normal coronary arteriogram (p<0.005). The incidence of postinfarct complication and symptomatic recurrence rate of ischemic heart disease after AMI showed no differences between the two groups. In conclusion, the incidence of AMI with normal coronary arteriogram was higher than that of other western studies. The reason for this difference is unclear, although it might be explained partially by a reported high incidence of vasospasm in our country. More data are needed especially in the aspect of prognosis, in order to establish the clinical significance of normal coronary angiogram in patients with AMI.

생쥐의 B 세포에서 anti-CD40과 rIL-4로 유도된 싸이토카인 생산에 대한 자초의 효과

박대원 ( Park Dae Won ),이용섭 ( Lee Yong Seob ),서영배 ( Seo Yeong Bae ),안덕균 ( An Deog Gyun ),최호영 ( Choe Ho Yeong ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.4

N/A Objectives : In order to study the anti-allegy effect of water extract of Lithospermi Radix on the B-cells from healthy Balb mice. Methods : The cytotoxicity of Lithospermi Radix was measured with the murine normal lung fibroblast cells by modified SRB assay. And the murine splenic B-cells was stimulated with anti-CD40 mAb and r U . The various cytokines related with allergy were measured by flow cytometry and by RT-PCR. Results : The anti-allegy effects to Lithospermi Radix were identified and observed. The cytotoxicity of Lithosptmni Radix on mouse lung fibroblast cells showed no significant activities. Lithospenni Radix had inhibitory effect on CD23, CD69 and IgE expression by Lithospenni Radix with anti-CD40 mAb plus rIL-4-stimdated murine splenic B-cells. Lithospermi Radix had inhibitory effect on cytokines (IL-1 a, IL-4, IL-5, IL-6, TNF-a) by Lithospermi Radix with anti-CM mAb plus rIL-stimulated murine splenic B-cells. Conclusion : We concluded that Lithospermi Radix showed anti-allegy effect on murine splenic B-cells.