The prediction of the tooth size in the mixed dentition for Korean

Moon, Sung-Hwan,Kim, Seong-Oh,Yu, Hyung-Seong,Choi, Byung-Jai,Choi, Hyung-Jun,Lee, Jae-Ho 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2

이번 연구의 목적은 혼합치열기 아동에서 미맹출된 견치와 소구치의 크기를 예측하는데 있어서 한국인에 맞는 방정식을 만들기 위함이다. 미맹출 치아의 크기를 예측하는 것은 혼합치열기 교정 진단과 치료계획 수립에 있어서 매우 중요하다. 미맹출된 견치와 소구치 크기를 예측하는 방법은 몇가지가 있지만 그중에서도 가장 흔하게 쓰이는 것이 모이어의 예측표와 다나카와 존스턴의 방정식이 있다. 하지만 그것들은 백인을 위해서 제작된 것이고 치아 크기는 인종에 따라서 다르다고 알려져 있다. 이번 연구에서는 치아크기를 측정하여 하악 영구 절치의 크기 합과 견치 및 소구치의 크기 합 사이의 상관관계를 구하고 회귀방정식을 이용해서 한국인에 맞는 예측표를 만들었다. 연세대학교 치과대학에 재학중인 178명의 한국 학생(남 108명, 여 70명, 평균연령 21.63)을 대상으로 실험하였다. 영구치의 근원심 폭경을 석고모형상에서 calipers를 이용해서 측정하였다. 성별간의 치아 크기는 차이가 있었다(p<0.05). Correlation coefficient는 0.57에서 0.64의 범위였고, standard errors of the estimates 는 여성에서 0.6으로써 남성보다 우수하였다. r^(2)값은 0.27에서 0.41의 범위를 나타내었다. Estimating the size of unerupted teeth is an essential aspect of orthodontic diagnosis and treatment planning in the mixed dentition. Several methods were introduced and used for the prediction. The most common methods among these would be Moyers probability chart and Tanaka and Johnston equations. These are currently used widely, but they were developed for Caucasians. Because there are clear racial differences in teeth size, the objectives of this study were to produce correlation coefficients between the combined mesiodistal widths of the permanent mandibular incisors and those of the canines and premolars for each quadrant, and prediction tables with regression equations, specifically for Korean. 178 young adults (70 women, 108 men, mean age 21.63 years) were selected from the College of Dentistry, Yonsei University, Seoul, Korea. The mesiodistal crown diameters of the permanent teeth were measured with calipers. Significant sexual dimorphism was found in tooth sizes. The correlation coefficients between the total mesiodistal width of the mandibular permanent incisors and those of the maxillary and mandibular canines and premolars were found to be between 0.52 and 0.64. The standard error of the estimatation was better (0.60) for women and the r^(2) values ranged from 0.27 to 0.41 for both sexes, Prediction tables were prepared for Korean. This study showed larger canine and premolar diameters than Tanaka and Johnston's and Moyers' studies which might be due to the racial differences. Further investigations with a larger sample size will be needed for more representative data on the Korean population.

The Ameliorative Effects of Korean Bean‐Leaves on Inflammation and Liver Injury in Obese Rat Model

Byung?Moon Jin,Seok?Cheol Choi,Hye?Sook Lee,Sang?Bong Jung,Kyung?Yae Hyun 대한의생명과학회 2013 Biomedical Science Letters Vol.19 No.3

Obesity may cause metabolic syndrome and adult diseases. This study was undertaken to investigate the ameliorative or useful effects of beanleaves on inflammation and liver damage in obese rat models. Rats were divided into three groups: a control group (normal diet, n=6), a fat diet group (45%?fat diet, n=7), and a bean leaf group (45%?fat+Korean bean leaves diet, n=7). Body weights in the bean leaf group were lower than those of the fat group (P<0.05). Serum tumor necrosis factor?α (TNF?α) and prostaglandin E₂ (PGE₂) concentrations were lower in both the control and bean leaf groups than in the fat group (P<0.001). TNF?α concentrations in the bean leaf group were slightly higher than in the control group but statistically significant (P<0.05). The bean leaf group histologically exhibited lower fatty degeneration, spotty necrosis, and leukocyte infiltrations in hepatic tissues than those of the fat group. In the homogenized liver tissues, the cyclooxygenase?2 (COX?2) gene was only expressed in the fat group. The gene expression levels of hepatic TNF?α, inducible nitric?oxide synthase, peroxiome proliferator?activated receptor?α (PPAR?α), poly (ADP?ribose) polymerase (PARP), and transforming growth factor?β1 (TGF?β1) were weaker in the bean leaf group than in the fat group. These results suggest that adding bean?leaves to the diet may ameliorate obesity?induced systemic inflammation and liver damage and that bean leaves may be a useful food for preventing obesity and thereby metabolic syndrome and adult diseases

初.中學校 自然.科學 敎科書에 取扱된 植物의 分類

崔炳基,文成基 慶星大學校 1995 論文集 Vol.16 No.3

We classified the plants demonstrated in total 39 Science textbooks and Nature Study textbooks newly-revised in 1989. (24 National textbooks in Elementary schools, 15 Nation-approved textbooks 5 categories in Middle school) In this study, Plant Categories-14 divisions, 116 famillies, 82 genera and 218 species-were examined. Among these, there were 159 kinds of Angiospermae, which were the most, and 2 kinds of Bacteriophyta, and one kind of Cyanophyta, Euglenophyta, Pyrrophyta and Lichenophyta, which was minor species in division. In Elementary school, 117 kinds in 7 division of the plants were being taught, and In Middle school, 190 kinds in 14 divisions of the plants were being taught. There were considerable differences between the categories of the plants being taught in elementary and in middle school.

ATM상의 서로 다른 LIS에 속한 IP 호스트간의 직접 연결

최봉문,조병호,심원 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

The existing local area networks are primarily based on shared media interconnects, which are likely to become potential bottlenecks not only because of new multimedia applications but also because of the rapid growth of services employing simple data transfers. Asynchronous transfer mode(ATM) is viewed as an emerging technology capable of removing this bottleneck. Therefore it requires implementing the IP in the evolving ATM local area networks. Implementing IP directly over ATM require translating an IP address to an ATM address. This paper suggests a new path control server and one-to-one connection set-up type to minimize such limitations which come from connection set-up. The suggesting model, which has independent server on connection set-up required at each logical IP subnetwork, provides faster routing information by managing path control informations to establish direct connections across IP subnets in the ATM domain.

출생시 신생아 혈액중의 2,3-DPG 농도

문현석,최병권 중앙대부설한국의과학연구소 1984 한국의과학 Vol.16 No.4

임상학적 적용을 위한 FET형 요소센서의 제조 및 그 특성

최성문,김응수,박동수,김의락,손병기 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

A FET type micro urea sensor - very proper and promising shapes for in vivo, in situ measurements - had been examined on its compatibilities with clinical analysis. Investigations were performed on the interference of various amino acids, organic metabolites and waste products present in blood, which may cause interference with the sensor output. The results of the measurements of urea-nitrogen in blood plasma measurements was compared with those of conventional spectrophotometric method.

마이크로 프로세서를 이용한 RNS 디지털 필터의 실현에 관한 연구

최병도,김문수 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2

Digital filiters are imcreasingly beimg used in the ranges of instrumentation. space communication and cintrol engineering. RNS(residue number system) offers the possibility of high speed opration and error detection/correction because the separability of arithmetic operation is possible. This paper shows the implementation of RNS digital filter using micro processor. RNS digital filters are designed and then simulated by personal computer, Based on these results, RNS digital filter is implemented using ROM look-up table method for this study. 2nd-order recursive digital filter is implemented and the result is same with that of computer simulation. We are confirmed that it is very easily realized using the micro processor for RNS special digital systems.

퍼지 c-버라이어티 클러스터링 및 적응 표면 복원에 기반한 3차원 물체의 자료 압축 알고리듬

최병걸,강훈,문성환 중앙대학교 생산공학연구소 1998 생산공학연구소 논문집 Vol.7 No.1

3차원 공간 물체의 자료 압축은 거대한 자료 크기, 느린 처리 시간, 잡음 및 측정 오차 등의 불규칙성과 같은 한계를 가지고 있다. 최근 인터넷에서 정보 전달의 활성화와 함께 대용량의 자료 교환이 가능하게 되면서 3차원 정보 처리에 대한 연구는 매우 중요한 문제로 부각되고 있다. 본 논문에서는 우선 3차원 물체를 구성하고 있는 면을 추정하고 이를 FCV(Fuzzy c-Varieties) 클러스터링에 적용하여 3차원 물체의 변(edge)과 정점(Vertex)을 찾는 알고리듬을 이용하여 자료의 양을 줄일 수 있는 방법을 제안하며, 위 알고리듬을 적용한 결과를 보였다. Data compression of 3 dimensional objects has limitations such as large data size, slow processing time, uncertainties of noise and measurement errors. Recently, along with activities of information transmission in internet, the researches in 3 dimensional information processing become a very important issue as the exchanges of large data are available. In this paper, we propose a data compression algorithm which first estimates the surfaces of 3 dimensional objects and then apply them to the FCV(Fuzzy c-Varieties) Clustering to obtain 3 dimensional edges and vertices, and represent the results.

鬱陵島의 生物相一報

崔炳文 淸州敎育大學校 1973 論文集 Vol.9 No.1

雜種强勢 發現家蠶의 計量形質에 관한 硏究

文炳圓,金圭範,崔周鎬 진주산업대학교 1999 산업과학기술연구소보 Vol.- No.6

본 試驗은 누에 一代雜種育種에 있어 良質多絲量 優量品種을 育成하기 위한 遺傳的 情報를 얻고자 遂行되었다. 供試材料는 特性이 각각 다른 日, 中,歐 3個地域 6개 品種을 正逆으로 一.面交雜시켜 F_1, F_2 각각 30組合으로서 實用形質에 대한 育種價를 얻기 위해 交配組合別 雜種强勢 및 組合能力의 檢定한 結果는 다음과 같다. 1.形質들의 雜種强勢은 絲質形質인 繭絲量, 繭絲長에서 각각 24.51% 및 23.43%로 높았고 繭質形質인 全繭重 및 繭層重은 15.56%∼15.71%, 17.14%∼19.01%로서 有意한 强勢로 보였으나 幼蟲經過日數등 (5齡 및 全齡)에서는 負의 雜種强勢를 나타낸다. 2.交配組合間의 雜種强勢는 5齡經過日數의 경우 C70×Romogua, N9×Romogua조합이 높은 負의 强勢現象을 보여 飼育日數가 短縮되는 方向으로, 全繭重은 N9×Sansurian의 암, Romogua×Sansurian의수, 繭層重은 암수에 關係없이, N9×San-surian의 繭絲長과 繭絲量에서는 Sansu-rianxRomogua의 正逆間 交雜에서 높다. 3.雜種强勢의 母本效果는 N9×C5, N63×C70 이 全繭重과 繭層重에서 繭絲長에서는 Sansurian이 N63, C5 및 C70과 交雜될 때, 또한 繭絲量에서는 N9×C70, N63×N70이 큰 傾向이다. 4.F_1의 組合能力에서 分散量은 GCA, SCA 및 RCA의 全形質에서 有意하여 F_1의 組合能力은 相加的 效果와 非相加的 效果가 함께 作用하고 形質에 따른 正逆間 差異가 크다. 5.GCA의 效果는 經過日數에서는 Sansurian이 負로, N9, C5가 繭質形質(繭長, 繭幅, 全繭重, 繭層重 및 繭層比率)과 絲質形質(繭絲長, 繭絲量 및 生絲量比率)에서 世代에 關係없이 높은 正의 效果를 나타낸다. 6.F_1의 SCA效果에서 5齡經過日數는 Sansurian×C70, Romogua×C70, Sansurian×C5, Romogua×C5등 歐州種系와 中國種系간의 交雜에서, 全繭重과 繭層重은 N9×C5, C70×Sansurian이 암수에 關係없이 Romogua×Sansurian, N9×C5가 F_1, F_2間에 繭絲量은 Ronogua×N63 組合에서, 生絲量比率은 Sansurian×Romogua 組合에서 높게 評價되다. Six parental varieties and each set of 30 diallel crosses in F_1`s and F_2`s were used as test materials. These were bred on the randomized complete block design with three replications. Fourteen Charateristics were studied with the twenty samples in each tray and analyzed for the heterosis and the combining ability in F_1 hybrids. The results obtained as follows ; The heterosis were showed positively high at 24.51% in cocoon weight and 23.43% in cocoon length respectively. The whole cocoon weight showed a sighificant heterosis ranging form 15.56% to 15.71% and also the weight of whole cocoon layer from 17.14% to 19.01%, but the 5th instar and the total instar period showed negative heterosis. It was found that the combination between C70×Romogua and N9×Romogua showed highly a negative heterosis on the 5th instar period and for the cocoon weght. The female of N9+Sansurian and the male of Romogua×Sansurian have highly effected of heterosis on the cocoon shell weight, and Sansurian×Ronogua(reciprocal) on the weight and the length of cocoon filament with no regard to sexuality. The combinations among N9×C5 and N63×C70 were observed with a significant maternal and cytoplasmic effet on the heterosis of cocoon weignt and cocoon shell weight and also those had on the length of cocoon filament with combiantions amongst Sansurian×N63, Sansurian×C5, Sansurian×C70 and N9×C70, and N63×C70 also such on the weight of cocoon filament. As a mean squares of GCA, SCA and RCA it were significant with these combining ability for all characteristics resulted from additive and non-additive together and there is a significant among reciprocals. Sansurian showed a negative GCA effect on the 5th and total larval duration, but a higher positive GCA effects tok place with varieties of N9 and C5 on the length, the weight, the length and weight of cocoon filament , the percentage of raw silk with no regard to both generations and silkworm sexuality. The values by cross combinations were varied in generation-wise and sex-wise. It was shot it was positive effect on the cocoon weight, cocoon shell weight with N9×C5 and C70×Sansurian, and on the length of cocoon filament with N9×C5 and Romogua×Sansurian on the weight of cocoon filament between Romogua and N63 and on the percentage of raw silk for the combination of Sansurian×Romogua.