수학자 보재 이상설(李相卨)의 근대자연과학 수용 -『백승호초(百勝胡艸)』를 중심으로-

이상구 ( Sang Gu Lee ),박종윤 ( Chong Yun Park ),김채식 ( Chae Sik Kim ),이재화 ( Jae Hwa Lee ) 한국수학교육학회 2013 수학교육논문집 Vol.27 No.4

본 논문은 한국 근대수학교육의 아버지 이상설(李相卨, 1870-1917)이 자연과학―물리학―에 기여한 내용을 다루고있다. 이상설은 ?수리(數理)?를 쓴 시기를 전후하여, 같은 시기에 붓으로 총 8면에 걸쳐 『백승호초(百勝胡艸)』라는이름의 고전물리학 원고를 써서 남겼다. 분석결과 이 책의 원전은 1879년에 동경제대 의학부 교재로 발간된 『물리학(物理學)』이다. 이상설은 『백승호초』에서 먼저 개념을 정의하고, 일상에서 나타난 대표적 현상을 선록하여 한문으로번역하였고, 『물리학』의 전체 분량에서도 특히 ‘통유성(通有性)’에 중점을 두고 설명하였다. 동양에서 서양의 수리과학이 들어와야만 말할 수 있는 ‘질량보존의 법칙’, ‘타성(惰性, 관성)’과 같은 고전물리학의 중요개념을 포함하는 내용이 19세기 말에 이미 이 책에 소개된 것으로 보아 이상설은 당대의 다른 저술에서 보기 힘들 정도로 당시 일반물리학의 최고수준의 원서를 통해 최신 정보를 수용하고 전파하기 위하여 노력하였음을 볼 수 있다. Sang-Seol Lee(1870-1917) wrote a manuscript BaekSeungHoCho(百勝胡艸) in the late 19th century. BaekSeungHo-Cho was transcribed in classical Chinese from the 1879 Japanese book Physics(物理學) by Teizo Ihimori (1851-1916). Sang-Seol Lee, a famous independence activist, is also called Father of the Modern Mathematics Education of Korea,because of his early contribution to the modern mathematics education in the 19th century. In this paper, we introduce contents of his manuscript BaekSeungHoCho for the first time and discuss the significance of this book. Also, we show his constribution on the introduction to modern physics in the late 19th century Korea.

WCDMA 역방향 링크에 대한 적응 빔포밍 기법에 관한 연구

이재식,김종윤,장태규 중앙대학교정보통신연구소 2001 정보통신연구소논문집 Vol.3 No.1

본 논문은 WCDMA 시스템의 역방향 링크에서의 적응 빔포밍 적용에 관하여 기술하였다. 제안된 빔포밍 구조는 제어채널의 파일럿 심볼을 이용한 빔포밍 계수 계산과 데이터 채널에 적용하는 분리구조를 가지고 있다. 적응 빔포밍의 대표적 방식인 LMS 알고리즘과 steering 알고리즘을 적용하여 성능 분석과 시뮬레이션을 수행하였으며, 다양한 환경 변수에 따른 시뮬레이션 결과는 빔포밍 알고리즘의 구현과 설계에 있어 중요한 지침을 주리라 기대된다. The paper presents a beamforming structure for the reverse link of WCDMA system. The proposed beamforming structure consists of the two separate operations, i.e., the computation of beamforming weights utilizing the pilot symbols and the application of the weights. The LMS-based beamforming algorithm and the steering beamforming algorithm, which are the two representative means of adaptive beamforming are designed and included in the performance analysis and simulation. The simulation results of the beamforming performance in relation to the various environmental parameters are important since they can provide useful guide in designing and implementing the beamforming algorithm for WCDMA system.

Bleomycin이 Mouse 간장의 Alkaline Phosphatase 활성에 미치는 영향

이규식,정호삼,이군자,김종우 한양대학교 의과대학 1987 한양의대 학술지 Vol.7 No.2

Bleomycin hydrochloride isolated from the Streptomyces veticillus has been widely used as an anticancer drug. In exhibits specific antineoplastic activity against squamous epithelial carcinomas of the skin. Bleomycin causes inhibition of DNA and protein synthesis by incorporating bithiazole group of the drug into DNA. The author undertook the present study to investigate the effect of bleomycin on the alkaline phosphatase activity in the mouse liver. The experimental animals were sacrificed at 6, 12, 24, and 48 hours after administration of 150 mg/kg of bleomycin. The activity of lkaline phosphatase was observed by Gomori's method for histochemical study. The results were as follows. The activity of alkaline phosphatase was decreased in the entire hepatic lobule of the 12 hours belomycin treated group and recovered in the 24 hours bleomycin treated group. Consequently, it is suggested that bleomycin has the cytotoxic effect on the hepatocytes.

국산 무기 섬유계 단열재에 관한 연구

이종민,신현택,양중식 연세대학교 산업기술연구소 1980 논문집 Vol.12 No.2

Thermal characteristics and the related physical properties of various domestic fibrous inorganic products were investigated and the results are as follows: 1) Quality of the domestic fiber glass and the products meet the standards designated under KS, JIS and ASTM, and the products showed the fiber diameter of 4-15μ, the density of 0,004-0.07g/㎤ and the thermal conductivity of 0.027-0.049kcal/m hr℃. 2) Insulating characteristics of the glass fiber products are closely related with the diameter of the glass fiber and the density of the products, are increased with smaller fiber diameter and higher density of the products, and showed the thermal conductivity mostly lower than 0.035kcal/m hr℃ at 20℃ (Mean temp.) 3) Domestic mineral fiber showed its fiber diameter of 5-11μ and the thermal conductivity of 0.025-0.37kcal/m hr ℃ at 20℃ (Mean temp.)

天然洗劑의 生物分解에 관한 硏究

이춘식,최종수,박승조 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.1

We were investigated with biodegradation of natural detergent by using jar-test, column test and activated sluge process. We were studied the BOD loading rate, the removal rate of organic material, the relationship between F/M, ratio, BOD and SS, SRT and MI, VSS/MLSS ratio. The results are summarized below. 1. In case of column height 160cm, suspended solid removal rate was 60.93%, COD, BOD and SS removal rate were 40%, 33% and 87% repectively in jar-test. In this case dosage of coagulant was 40.9g/㎥ alum, 4.5g lime/㎥ and 0.4g/㎥ polymer. 2. Wastewater containing natural detergent concentrationabout 600-1300mg/l was treated with activated sludge process and then removal rate of BOD is 80% in winter atmospheric temperature. In this case BOD concentration was about 10mg/l. 3. Wastewater containing natural detergent was treated with activated sludge process and then BOD volumetric loading rate is 0.3-0.8kg BOD/㎥·d. In this case BOD removal rate was about 90 %, MLVSS/MLSS ratio was 0.4-0.5 and SVI is 60-200.

감나무탄저병에서 분리한 Gloeosporium kaki의 2계통

崔貞植,李貴宰,金炯武,蘇仁永 全北大學校 1993 論文集 Vol.35 No.-

A anthracnose symptom at persimmon tree was found out in the field, Chonju in Chonbuk province and Haenam Experiment Station in Chonnam province in 1991 and 1992. The cultivated character and the pathogenicity of the fungi were as follows : These fungi, Gloeosparium kaki which were isolated from the anthracnose were classified into strain Ⅰ and Ⅱ by the cultivated characteristics. The size of conidia in strain Ⅰ was 22.5 × 6.82 ㎛ and that of strain Ⅱ was 20.3 × 6.2 ㎛. In a PDA, the colour of strain I was light brown and made a central zone. The colour of strain Ⅱ was black brown and deep grey and didn't make a central zone. The pathogenicity of strain Ⅰ was similar to strain Ⅱ in the leaf, branches.

가토에 있어서 편측 요관 폐색시 환측, 반대측 요관에 대한 변화 : 조직학적 소견을 중심으로

설종구,김용웅,육승모,노안식,김홍식,김상현,이충식 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

This study was designed to clarify histological changes in the experimental rabbit ureter after unilateral prartial or complete ureteral obstruction. A total of 20 adult white rabbits were divided into 4 subgroups in the partial obstruction followed by 2 weeks, partial obstruction followed by 4 weeks, complete obstruction followed by 2 weeks, complete obstruction followed by 4 weeks. The normal control group consisted of 5 adult white rabbits. The H & E stain. light microscopy were used. Abnormal histological fingings were showed in ipsilateral ureter of all subgroups; dilatation of ureter, epithelial cell atrophy or loss, interstitial fibrosis, interstitial inflammation. These findings were most severe in the complete-obstructed ureter for 4 weeks. There were no significant changes in contralateral ureter of all subgroups. Despite of progressive histological changes in ipsilateral ureter no abnormal findings were showed in contralateral ureter. We suggest that long term experimental investigation for histological changes in ipsilateral ureter and compensatory changes in contralateral ureter should be done.

하악골 절제술후 재이식된 돌결자가골 재이식 : 치험 3례

김 식,김수관,김운규,김수민,류종희,이준길,조경안,김수흥,정태영,여환호 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.2

We described three cases of immediate reimplantation of a frozen-thawed autogenous mandible composed of a mixture of iliac bone, marrow, and particulate hydroxyapatite in tumors of the mandible. Acceptable outcomes were obtained in three patients who underwent immediate autogenous mandibular graft reconstruction. The conditions leading to successful outcome of the procedure are also discussed. Reimplantation of frozen autogenous lesioned mandible was performed in three patients with mandibular tumors. Two reimplanted grafts survived without complications following surgery. One case had postoperative infection that resolved with appropriate antibiotic treatment. There were no recurrences of the primary lesions. Satisfactory facial contour after surgery was achieved. These results are most promising, and we believe that, with further refinement, this technique will offer a new and acceptable modality for facial reconstruction in patients with cancer.

L-Moment 법을 이용한 지역적 가뭄빈도분포형 결정

강인식,신형우,이종규,박준일 慶尙大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.15 No.-

To quantitatively investigate the nationwide drought characteristics and to comparatively evaluate the drought severity, regional frequency analysis developed from cumulative monthly precipitation series is made for the meteorological stations in each of the 15 subbasins covering the whole nation. The best-fit probability distribution is chosen by the method of frequency analysis made the discordancy measure for each stations, the regional heterogeneous measure and the goodness-of-fit measure, the probability distributions fitted drought precipitation series are multi-parameter probability distributions, The method of L-moments is used to determine the unbiased parameters of each distribution and the best-fit distribution for each subbasin of various durations(4, 6, 9, 12, 15, 18, and 24 months) with return periods of 2, 5, 10, 20, 50, and 100 years are estimated. This study is focused on suggesting the method determines the drought precipitation of the durations and return periods of each regions by the probabilistic analysis.

ZnS 螢光體의 結晶構造轉移에 따른 Photoluminescence 硏究

朴鍾允,李悳源,洪泰植 성균관대학교 기초과학연구소 1985 論文集 Vol.36 No.1

A comprehensive study of ZnS : [Zn] and ZnS ; [Zn] Cu phosphors has been carried out by examining spectral distribution curves of emission during excitation by ultraviolet (3650 Å). Transition from the cubic form to the hexagonal one in crystal structure of ZnS occured at 1150℃. There were maximum peaks position in luminescence spectra of cubic and hexagonal structure at about 4650 Å and 4500 Å, respectively. By doping Cu as an impurity, maximum peak positions in both case were shifted to the long wavelength. These phenomena seem to be caused by interstitial defect due to impurity.