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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.
석병석(Suk, Byong-suk),민승용(Min, Seung-yong),권재욱(Kwon, Jae-wook),김창균(Kim, Chang-kyoon),문상만(Moon, Sang-man),최수진(Choi, Su-jin),구철회(Koo, Cheol-hea),김인규(Kim, In-kyu),류동영(Ryu, Dong-young) 한국항공우주연구원 2015 항공우주산업기술동향 Vol.13 No.2
시험용 달 궤도선의 발사 요구조건 사전 분석 단계로 최근 외국에서 발사한 달 탐사선의 발사 요구조건을 분석하였다. 일반적으로 달 탐사선의 발사 요구조건은 달 임무 궤도를 결정하는 중요한 요소이며, 또한 지구, 달, 태양의 상대적인 운동으로 인해 임무궤도 요구조건을 만족하는 발사 가능 시간이 주기적으로 반복되는 경향이 있다. 분석 결과 설정된 발사 요구조건들로부터 달 궤도선의 주 임무가 달의 남/북극 지역의 광학 관측 임을 간접적으로 알 수 있었다. 향후 우리나라 달 궤도선 발사 요구 조건 설정에 본 논문이 도움이 되길 기대한다. In the preliminary study on launch window requirement for Korea Path-finder Lunar Orbiter(KPLO), the recent foreign lunar orbiter’s lauch window requirement was analyzed. Normally, the launch requirements depends on the mission orbit. Based on the relationship between Moon, Earth, and Sun, the launch time will be available periodically to meet requirements. In this paper, it is understood that the launch window requirements come from payload mission requirements to take picture each poles of Moon. This paper might be a practical example to derive KPLO launch requirements in the future.
Park, Nam Suk,Lee, Sang Mong,Moon, Jae Yu,Seong, Su Il 한국잠사학회 1999 한국잠사곤충학회지 Vol.41 No.2
The storage protein-like protein has been purified from the 5th instar larval haemolymph of the Chinese oak silkworm, Antheraea pernyi, and the preparation was shown to be homogeneous by 7.5% nativePAGE. The molecule was consisted of a single Submit with a molecular weight of 80K, but the number of the subunits was not determined. The protein was defined as glycoprotein by Schiffl's reagent stainting. Rabbit antibody prepared against the purified protein crossreacted with the 5th instar larval haemolymph protein of Antheraea pernyi and Anteraea yamamai, but not with those of Bombyx mori and Bombyx mandarina.
Moon, Young-Jin,Kim, Juyoung,Seo, Dong-Woo,Kim, Jae-Won,Jung, Hye-Won,Suk, Eun-Ha,Ha, Seung-Il,Kim, Sung-Hoon,Kim, Joung-Uk The Korean Dental Society of Anesthsiology 2015 Journal of Dental Anesthesia and Pain Medicine Vol.15 No.4
Background: The ideal alternative airway device should be intuitive to use, yielding proficiency after only a few trials. The Clarus Video System (CVS) is a novel optical stylet with a semi-rigid tip; however, the learning curve and associated orodental trauma are poorly understood. Methods: Two novice practitioners with no CVS experience performed 30 intubations each. Each trial was divided into learning (first 10 intubations) and standard phases (remaining 20 intubations). Total time to achieve successful intubation, number of intubation attempts, ease of use, and orodental trauma were recorded. Results: Intubation was successful in all patients. In 51 patients (85%), intubation was accomplished in the first attempt. Nine patients required two or three intubation attempts; six were with the first 10 patients. Learning and standard phases differed significantly in terms of success at first attempt, number of attempts, and intubation time (70% vs. 93%, $1.4 {\pm}0.7$ vs. $1.1{\pm}0.3$, and $71.4{\pm}92.3s$ vs. $24.6{\pm}21.9s$, respectively). The first five patients required longer intubation times than the subsequent five patients ($106.8{\pm}120.3s$ vs. $36.0{\pm}26.8s$); however, the number of attempts was similar. Sequential subgroups of five patients in the standard phase did not differ in the number of attempts or intubation time. Dental trauma, lip laceration, or mucosal bleeding were absent. Conclusions: Ten intubations are sufficient to learn CVS utilization properly without causing any orodental trauma. A relatively small number of experiences are required in the learning curve compared with other devices.
One for Many: A Universal Reagent for Acylation Processes
Moon, Hyun Kyung,Sung, Gi Hyeon,Kim, Bo Ram,Park, Jong Keun,Yoon, Yong‐,Jin,Yoon, Hyo Jae WILEY‐VCH Verlag 2016 Advanced synthesis & catalysis Vol.358 No.11
<P><B>Abstract</B></P><P>This work describes acylation reactions facilitated by a type of heterocycle‐based acyl transfer agent, 2‐acyloxypyridazinone. Reactions of 2‐acyloxypyridazinone with carboxylic acids yield mixed carbonic anhydride intermediates, which are reactive and could be coupled with a wide range of substrates including acids, amines, alcohols, and thiols. The wide substrate scope, ease of operation (no additive or catalyst), storage and handling stability, and atom‐efficiency from recycling the heterocycle carrier make the reported acylating agent attractive for acylation‐based coupling reactions.</P>
Sang-Hyup Lee,Jae-Moon Im,Kwang-Bok Shin 한국철도학회 2019 International Journal of Railway Vol.12 No.2
In this study evaluated the mechanical properties of randomly oriented composite materials used as reinforcement in railway facilities, and proposed equations to predict the changes in mechanical properties with varying curing temperature. The curing temperature is an important factor for reducing the time of FRP reinforcement work and prior to changing curing temperature, evaluation of mechanical properties for randomly oriented composite materials with varying curing temperature is essential. Thus, tensile specimens of chopped strand mat and glass fiber combination mat as randomly oriented composite material were manufactured by varying curing temperature and mechanical properties were evaluated. As a results of the test, it is considered that the glass fiber combination mat showed changes in tensile strength and elastic modulus of up to 8% with varying curing temperature. So that it is able to reinforce the railway facilities in the high temperature. The mechanical properties of chopped strand mat changed by more than 24%. To predict mechanical properties in relation to curing temperature, equations were derived using the method of least squares.
Jae-Lyun Lee,Heung Moon Chang,Tae-Won Kim,Jeong Hwan Yook,Sung Tae Oh,Byung Sik Kim,Jung Shin Lee,Yoon-Koo Kang,Min-Hee Ryu 대한암학회 2005 Cancer Research and Treatment Vol.37 No.4
Purpose: Fluoropyrimidine (F) and platinum (P) combination chemotherapy has been widely used for the first line treatment of advanced gastric cancer (AGC). Docetaxel(D) has shown promising activity in this disease. The present study retrospectively investigated the efficacy of D monotherapy as salvage chemotherapy for AGC that is failing F and P combination chemotherapy.Materials and Methods: A total of 34 patients, fitting the eligibility criteria, were included in this study. D was administered at a dose of 75 mg/m2 IV every 3 weeks, with dexamethasone prophylaxis. Twenty-nine patients had measurable lesions. The median treatment-free interval was 38.5 days, and 91.2% of patients had progressedwithin 4 months of withdrawal of the first line chemotherapy.Results: A total of 133 cycles of D were administered, with a median of 3.5 (1∼8) cycles. From an intentionto- treat analysis, 6 patients achieved partial responses (PR), with a response rate of 20.7% (95% CI, 6.0∼35.4). The duration of objective PRs in these six were 2.3+, 2.5+, 2.9, 3.0+, 6.2 and 6.8 months, respectively. Six patients showed a stable disease, but 15 showed progression. The median time to progression was 4.2 months (95% CI, 2.8∼ 5.5), with a median overall survival since the start of D monotherapy of 8.4 months (95% CI, 5.5∼11.3). Grade 3/4 neutropenia and febrile neutropenia occurred in 12.9% of patients and 3.1% of cycles. The incidence of grade 3 or worse non-hematological toxicities were as follows; peripheral sensory neuropathy 9.7%, asthenia 3.2% and allergic reaction 2.7%.Conclusion: Docetaxel, 75 mg/m2, is active in AGC as second-line chemotherapy after failure of prior exposure to the F and P combination chemotherapy, with a favorabletoxicity profile.