철서 지역에서 채집한 양서류의 중금속 오염에 관한 연구

이호원,손성원,이두표,민병윤 경남대학교 환경문제연구소 1991 환경연구 Vol.13 No.-

본 연구는 비오염 지역에서 참개구리의 성장 단계벨로 증금속의 축적 변동을 조사한 것이다. 일반적으로 올챙이 시기의 증금속 농도는 Fe > Mn > Zn > Cu > Ni > Pb > Cd,Hg의 순이었으며 성체 시기에는 Zn > Fe, Mn > Cu > Pb > Ni > Cd, Hg의 순으로 나타났다. Fe, Mn, Cu, Ni 농도는 성장이 진행됨에 따라 점차 낮아지는 경향을 보였고 Zn은 전기간을 통해 큰 변동이 없는것으로 나타났다. 대부분의 원소는 뒷다리 형성 시기에 체중 증가에 따른 농도 회석 현상이 발견 되었으며 이러한 현상은 Fe, Mn, Ni에 대하여 성체가 되는 시기에 특히 현저하였다. Heavy metal accumulations and their age-related changes were investigated in the tadpole and adult frog (Rana nigromaculata) inhabiting non-polluted area. A rank of metal concentrations was Fe > Mn > Zn > Cu > Ni > Pb > Cd. Hg in tadpole stage, and Zn > Fe, Mn > Cu > Pb > Ni > Cd, Hg in frog stage. The concentration of Fe, Mn, Cu and Ni decreased with age, and Zn concentration did not change much. A dilution effect of metal concentration by increased body weight was observed in the stage of tadpole with hind limb for most of metals, and it was marked in the stage of adult frog for Fe, Mn and Ni.

바둑판을 이용한 흑백 게임의 최적해를 구하는 선형대수학 알고리즘

이상구,박종빈,양정모,김익표 한국수학교육학회 2004 수학교육 Vol.43 No.1

For finding the optimal strategy in Blackout game which was introduced in the homepage of popular movie "Beautiful mind", we develop a mathematical proof and an algorithm with a software. We only use the concept of basis and knowledge of basic linear algebra. This process can be extended to the fullsize Go table problem and shows why we have to study mathematics at the college level.

계산도구의 활용과 오차비교

이성철,전상표 남서울대학교 2004 남서울대학교 논문집 Vol.10 No.2

컴퓨터의 발달에 따라 수학문제 해결에 컴퓨터를 이용하는 컴퓨터대수 시스템을 적용하고 있다. 본 논문에서는 컴퓨터대수 시스템 중 많은 사용자가 선호하는 Mathematica와 Maple을 이용하여 다양한 수치적분을 계산하고 이때 발생하는 실제 넓이와의 오차를 비교하였다.

수학사를 이용한 수학교육의 방법

이성철,전상표 남서울대학교 2004 남서울대학교 논문집 Vol.10 No.2

It is the great necessity of mathematics in daily life. Also, importance of mathematics is more increase for our enhanced living in 21st century. But mathematics education of Korea is getting behind both quantity and quality, because many people think that mathematics is difficult and unaccessible. This paper give an mathematical interest through history of mathematics and present the Methods of mathematical education used on history of mathematics.

대퇴간부 골절의 교합성 골수강내 고정술후 발생한 금속정의 슬부내 돌출

이상흥,표영배,이병호 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

拜禮에 관한 一考察 : 「周禮」의 辨九拜를 中心으로 Focused on Jurge's nine sorts of Baerye

李吉杓,表成恩 성신여자대학교 생활문화연구소 1991 生活文化硏究 Vol.5 No.-

설편평세포암에서 CD44, MMP-2, MMP-9, TIMP-1의 발현

이상화,표성운,김영실,최목균 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4

Adhesion molecules and proteinases play an important role in the invasion and metastasis of a malignant tumor. However, there have not been many studies on tongue squamous cell carcinoma at Saint Mary's Hospital and Kangnam Saint Mary's Hospital, the Catholic University of Korea, between 1994 and 2000, and had not received chemo-or radiotherapy. The expression of the adhesion molecules CD44H, proteinases MMP-2 and MMP-9, and TIMP-1, which controls MMP activity, was analyzed by immunohistochemistry. In addition their association with the tumor size, lymph node metastasis, clinical stage, and cell differentiation was evaluated. Increased MMP-2 expression was significantly correlated with lymph node metastasis and clinical stage. However, it did not correlate with tumor size or cell differentiation. CD44H, MMP-9 and TIMP-1 expression were not significantly related to tumor size, lymph node metastasis, clincial stage and cell differentiation. The results suggest that MMP-2 is a possible immunohistochemical prognostic factor in tongue squamous cell carcinoma. Futher reasearches will be needed to investigate the additional tumor prognostic factors and their mechanisms.

형질변형성장인자가 손상골 재생능에 미치는 영향에 과한 실험적 연구

이병도,황의환,이상래,홍정표 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study was to observe the effect of TGF-81, which promotes differentiation and proliferation of osteoblasts, on bone regeneration. Experimental bone defects that measured 3 mm in diameter were created on the mandibles of guinea pig by removal of bone with the use of trephine burs. In one side of mandibular body, the experimental groups, bone defects were grafted with Biogran(Orthovita Co., U.S.A.) and TGF 131(R&D System Co., U.S.A.). In the remaining side of the mandiblar body, the control groups, bone defects were grafted with only Biogran. Guinea pigs in the control and experimental groups were serially terminated by fours on the 3 days, the 1 week, the 2 weeks, the 3 weeks, and the 4 weeks after experiment, and both sides of the mandibular bodies were removed and fixed with 10% neutral formalin. They were decalcified and embedded in paraffin as using the usual method. The specimen sectioned and stained with hematoxylin and eosin. Also, they were radiographed with a soft X-ray apparatus. The Obtained results.=were as follows; 1. Hemorrhagic condition, observed in the granulation tissues, disappeared on the 1 week after experiment in both groups, and more prominent in the experimental group. The granulation tissues of the experimental group had larger number of cells than those of the control group. 2. Osteoblastic differentiation in the margin of grafted material and adjacent bone was observed on the 1 week after experiment in both groups. Also, bone formation was observed in immature form on the 1 week after experiment, and more prominent in the experimental group. 3. In the polarizing microscopic examination, bone matrix was very loose on the 1 week after experiment, but increase in density with time, and more prominent in the experimental group. 4. In the microradiographic examination, newly formed bone was observed in the experimental group on the 2 weeks after experiment, and this was observed earlier than in the control group. Newly formed bone was increased with time and defected area was markedly decreased on the 4 weeks after experiment.

당근 육종에 있어서 계통선발 평점에 관련된 主要 形質들의 經路係數 分析

표재수,이상우,김주현 경상대학교 농업생명과학연구원 2002 농업생명과학연구 Vol.36 No.2

당근 육종 과정 중 유망계통으로 선발되는 기준인 선발 평점이 주로 어떤 형질들에 의해 크게 영향받는가를 알고자 하였다. 5년에 걸쳐 봄 재배작형으로 시험한 자료를 가지고 상관 및 경로계수 분석을 통하여 선발평점에 미치는 여러 형질들의 직ㆍ간접효과를 조사한 바, 각 형질의 선발 평점에 대한 기여도는 년차에 따라 달랐다. 따라서 가장 큰 직접효과나 간접효과를 나타내는 형질은 매년 변하였다. 그러나 거의 항상 비교적 높은 직ㆍ간접 효과를 나타내는 형질은 찾을 수 있었는데 이는 근중과 고환성이었다. 이들 다음으로는 엽장과 수경등이었다. 반면 엽수, 지근, 근형, 근피특성 등은 직ㆍ간접효과가 가장 작았다. This study was conducted to clarify the direct and indirect effects of major morphological characters affecting selection score of carrot. The field experiment was carried out five times from 1991 to 1995. Root weight, number of leaf, leaf length, crown diameter, root diameter, root length, branch root, root cracking, bolting, uniformity, root-tail form, root shape, leaf weight, total weight, smoothness of root skin, hypertrophy of root and selection score were investigated. No character constantly showed the highest direct/indirect effect. Therefore the character showed the highest direct/indirect effect changed year to year. But it was possible to find out which characters were more important, or not. In frequency of high-ranked direct/indirect effect, two characters, root weight and root-tail form, were considered more important. The next characters were leaf length and crown diameter. The lowest were leaf number, branch root, smooth of root skin, and root shape.

S-Function Builder를 이용한 UWB 시스템의 성능해석

이성신,김기표,최정식,변건식 東亞大學校附設情報技術硏究所 2005 情報技術硏究所論文誌 Vol.12 No.2

The application of UWB not only complies with the requirements of remote sensors system(ECG), it also contributes to the effectiveness of the implementations through its unique qualities such as ultra low transmission power - an important factor when dealing with biomedical equipment. In this paper, the aim is to replace the wired ECG sensor with a wireless link and design wireless UWB communication system. The various pulse shapes are presented that satisfies the FCC spectral mask and FCC part 15 rule. It is shown that UWB can be a high rate transmission over short ranges using rake receiver, with the capability for reliably transmitting 100Mbps over distance at about 10 meters.