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.

扶正抗癌湯의 抗腫瘍效果에 關한 實驗的 硏究

文錫哉,文九,金柄住,田炳薰,元秦喜 대한동의병리학회 1997 동의생리병리학회지 Vol.11 No.2

腫瘍으로 인한 死亡率은 多樣한 名種 治療에도 不拘하고 循環器疾患 다음으로 2위를 차지하고 있다. 이에 著者는 韓醫學과 西醫學의 結合治療를 通해서 抗腫瘍藥物의 效果를 增進시키고 副作用을 줄이는 藥物의 開發을 爲하여 健脾 益氣 祛痰 補腎 杭癌效能을 갖고 잇는 扶正杭癌湯抽出液을 使用하여 Colony 形成抑制實驗, Sulforhoda-mine B(SRB) assay를 觀察하였고, 扶正抗癌湯抽出液과 抗癌化學療法劑인 Mitomycin C(MMC)를 Ehrlich carcinoma의 solid tumor와 ascites tumor에 各各 單獨 및 倂用 投與하여 抗腫瘍效果 및 Iysosomal enzymes의 活性에 대한 效果를 觀察하였다. 먼저 扶正抗癌湯抽出液을 Caki-1 cell, Hep 3B 및 A549에 투여한 후 增殖抑制作用을 colony 形成抑制實驗과 SRB assay를 통하여 觀察한 결과 濃度依存的으로 腫瘍細胞의 成長을 抑制하였다. Ascites form of Ehrlich carcinoma에 대한 抗腫瘍效果 實驗에서 扶正抗癌湯抽出液과 MMC를 병용투여한 결과, 扶正抗癌湯抽出液에 의하여 MMC의 抗腫瘍效果가 增加하였다. Solid form of Ehrlich carcinoma에 대한 抗腫瘍效果 實驗에서 扶正抗癌湯抽出液과 MMC를 병용 투여하였을 경우, MMC를 단독 투여하였을 경우보다 腫瘍의 크기가 현저하게 減少하는 결과를 보였다. Ehrlich ascites carcinoma cell에 扶正抗癌湯抽出液과 MMC를 병용 투여하였을 경우, MMC를 단독 투여하였을 경우보다 lysosomal enzymes의 活性이 强하게 나타났다. 本 實驗을 통하여 扶正抗癌湯抽出液은 MMC의 抗腫瘍效果를 증가시키는 效果를 보였다. 또한 扶正抗癌湯抽出液은 마우스에서 solid form of Ehrlich ascites carcinoma의 크기를 감소시키는 效果를 나타냈으며, 생존기간 實驗에서는 扶正抗癌湯抽出液과 MMC를 병용투여시 ascites tumor에 MMC를 단독으로 투여하였을 때와 비교하여 유의하게 생존기간을 증가시키는 결과를 보였다. 이상의 결과를 종합하여 볼 때 扶正抗癌湯抽出液은 用量에 依存的으로 直接的인 抗腫瘍效果가 있으며, 抗癌療法劑인 MMC의 效果를 亢進시키는 것으로 보아 間接的인 抗腫瘍效果도 있을 것으로 思科되나 正確한 效果를 究明하기 위해서는 보다 正確한 抗腫瘍機轉에 대한 硏究와 藥物學的 硏究 및 臨床的 硏究가 追加되어야 할 것이다. In order to investigate the effects of Bujeonghangamtang Extract(扶正抗癌湯抽出液) on antitumor effects after human cell lines(A549, Hep3B, Caki-1, Ehrlich) transplantation into the peritoneal cavity or right groin in mice induced by RPMI 1640 and DMEM etc, the extracts of its herbal medicines were orally administered for 10 or 12 days. Experimental studies were performed for measurement of antitumor effect of Mitomycin C(MMC) and lysosomal enzyme's activities using colony forming efficiency, SRB assay which were regarded as a valuable method for the measurement of antitumor effects of unknown compound on tumor cell lines. The results obtained in this studies were as follows: 1. The change of colony-forming efficiency and SRB assay of Caki-1 cells, Hep3B and A549 Cells after exposure to the extract of Bujeonghangamtang extract depressed the growth of tumor cells by concentration of Bujeonghangamtang. 2. Antitumor activity of the ethanol extract of Bujeonghangamtang extract and MMC on ascites form of Ehrlich carcinoma in mice is slightly improved. Especially the mean of survival times in the group of 200㎎/㎏ and MMC 0.1㎎/㎏ is improved over 30.9%. 3. When Bujeonghangamtang extract and MMC are administered together, the weight of tumor is more decreased than MMC alone. 4. The lysosomal enzyme's activities of the Bujeonghangamtang extract and MMC are more significantly improved than MMC alone. According to the above result, it could be suggested that Bujeonghangamtang extract has indirect antitumor effect by the increase of MMC uptake.

THERRESTRIAL IMPACT CRATERING CHRONOLOGY: A PRELIMINARY ANALYSIS

Moon, Hong-Kyu,Mi, Byung-Hee,Fletcher, Andre-B.,Kim, Bong-Gyu The Korean Space Science Society 2001 Journal of Astronomy and Space Sciences Vol.18 No.3

We have recently compiled a database of the properties of 192 impact craters, which supercedes previous compilations. Using our database, the impact structures found in North America, Europe and Australia have been examined; these cratonic areas have been relatively stable for considerably long geological periods, and thus have been best preserved. It is confirmed that there is a close correlation between the geological epoch boundaries, the epochs of mass extinctions, antral the "timing" of impacts. In addition, the terrestrial cumulative flux of objects >20km is found to be $1.77{\times}10^{-15}km^{-2}yr^{-1}$, over the last 120 Myr, which is much smaller than the published values in McEwen et al. (1997) and Shoemaker (1998) ($5.6{\pm}2.8{\times}10^{-15}km^{-2}yr^{-1}$. For terrestrial impact structures with D> 50 km, the apparent cumulative flux over the last 2450 Myr is ~50 times smaller than the corresponding value for the Moon. If we assume that the Earth and the Moon suffered the same level of bombardment over this time, this would mean that the actual flux of impacting bodies, capable of making craters with D)50 km, was ~ 50 times larger than the apparent flux estimated from the currently known terrestrial records.

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

잡음환경에서의 음성인식

문현택,이병수 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.2

In this thesis, problems connected with present speech recognition systems are pointed out and methods for performance improvement are proposed. Especially, a recognition system for use in a car noise environment is proposed and estimated. A speech recognition system comprises feature extraction, distance measure and pattern classification methods. Recently, weighted cepstral distance measures using LPC-cepstral coefficients as feature vectors have given high recognition rates, with HMM and DTW are widely used for pattern classification. But speech recognition rates drop rapidly in a noisy environment. To improve recognition accuracy in noise, an endpoint detection method which takes noise into account, a modified DTW, an autocorrelation subtraction method and a distance measure robust to noise are used to give improved speaker dependent isolated word recognition performance.

Fractal 차원에 의한 표면경화면과 마찰면의 형태해석

문병주,조연상,옥철호,박흥식,전태옥 동아대학교 생산기술연구소 2001 生産技術硏究所硏究論文集 Vol.6 No.1

The determination of surface middleography is believed to be extremely important in the areas of contact mechanics, adhesion and friction. In order to describe middleography of various rubbed and hardened surface, the wear test was carried out under different experimental conditions in dry friction. And fractal descriptors was applied to rubbed and hardened surface of laser modified steel with image processing system. These descriptors to analyze surface structure are fractal dimension. Surface fractal dimension can be determined by sum of intensity difference of surface pixel. middleography of rubbed and hardened surface can be effectively obtained by fractal dimensions.

적응 알고리즘을 이용한 DS/CDMA 간섭제거

문병현,손준일,이채욱 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.2

A DS/CDMA receiver with adaptive filter has more benefit than conventional DS receiver, such as near-far problem, multiuser interference rejection and artificial jamming. Usually in the CDMA receiver, filter length is same as spreading sequence length. So the more PN sequence length, the more number of calculation is needed for convergence. Recently, partial update algorithm like SNLMS or SBNLMS is proposed to resolve this problem. But these algorithms have defect that convergence is slow because of partial updating. We propose the effective adaptive algorithm for DS/CDMA multiuser interference rejection and show the correlation between the number of block and convergence in selective coefficient update algorithm.

AMPS 시스템과 주파수를 공유하는 CDMA시스템의 링크 해석

문병현,손병국,최정희 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.5 No.5

In this paper, the forward and reverse link cellular capacities analysis of code division multiple access (CDMA) is performed when the systems are sharing the same frequency band. It is assumed that the frequency reuse pattern K=5 is used for the analysis. Formule that describe the relationship between the number of CDMA and AMPS users for a given carrier to interference ratio (GI) of each are presented. In the comparison of the forward and reverse link analysis, forward link is smaller than reverse link. Therefore, the system capacity depends on the forward link rather than the reverse link.

How to Lead the Church to Grow through Leadership Training

문병하 그리스도신학대학교 출판부 2002 교수논문집 Vol.- No.-

무선 인터넷 환경에서 XML 서명 기법을 이용한 전자서명 시스템

문경원,황병연 가톨릭대학교 자연과학연구소 2004 자연과학논문집 Vol.25 No.-

무선 인터넷 환경의 급속한 발전으로 인해 무선 단말기를 이용한 전자상거래(M-Commerce)가 활성화되고 있다. 유선에서 이루어지는 전자상거래에서 데이터의 보안이나 사용자 신원 확인 같은 인증이 무선에서도 중요한 기술로 인식되고 있기 때문에 무선 인터넷 환경에서의 WPKI(Wireless Public Key Infrastructure)나 유선 인터넷 환경에서의 XML 전자서명 같은 연구가 활발히 진행되고 있다. XML 전자서명은 XML 문서를 이용하는 전자상거래 분야에 사용되어 전자서명 시스템간의 상호 연동성을 높일 수 있다. 본 논문에서는 기존의 유선 인터넷 환경에서 사용되고 있는 XML 전자서명 기법을 무선 인터넷 환경에 적용하여 XML 문서 및 전자서명 시스템들간의 상호운용을 가능하게 하는 시스템을 제안한다.