• 한국자원식물학회지
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• 제17권3호
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• pp.352-357
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• 2004

쓴메밀의 종자의 발아율은 발아온도의 증가와 더불어 증가되는 경향을 보이며, 초장은 3$0^{\circ}C$에서 가장 좋은 생육을 보이고 그 다음으로 $25^{\circ}C$ ＆gt; 2$0^{\circ}C$ ＆gt; 15$^{\circ}C$순으로 온도가 높을수록 초장의 생육이 왕성하였다. 온도처리에 따른 쓴메밀의 초장은 $25^{\circ}C$ ＆gt; 2$0^{\circ}C$ ＆gt; 15$^{\circ}C$ ＆gt; 3$0^{\circ}C$ 순으로 좋았으며, 엽수도 2$0^{\circ}C$ 및 $25^{\circ}C$에서 15$^{\circ}C$ 및 3$0^{\circ}C$보다 다소 증가하는 경향을 보였다. 일장처리에서 16시간 처리구를 제외하면 일장이 길어질수록 초장, 엽수 및 건물 중은 증가하는 경향을 보였으나, 루틴함량과 일장에 대한 일정한 경향은 없었다. 쓴메밀은 초장, 엽수, 분지수 및 경직경 등의 지상부 생육이 단메밀의 생육에 비해 왕성하였다. 특히 엽수에서 단메밀이 62.3에 비해 174.1로 약 2.8배 높았으며, 개체당 종실의 수량은 약 5.4배, 종실무게는 2.1배로 큰 폭의 차이 나타냈다. 쓴메밀 종실의 루틴함량이 1469.8로 단메밀의 22.6보다 약 60배 이상 높게 함유되어 있다.

• 대한안전경영과학회지
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• 제3권1호
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• pp.93-105
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• 2001

Many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources have been proposed, and GT, MRP and JIT are frequently used among these systems. The three systems have merits and demerits through comparing with each other. Because each system has mutual dependence, a hybrid production system Is necessary for using their merits maximally. In this study, a hybrid production system is designed by combining GT, MRP and JIT, which is suitable in the domestic production system and it is presented as followings. -. Basic research works for G7, MRP and JIT. -. Comparison and analysis are carried out for each system.- . The hybrid production system is designed. -. The hybrid production system is developed.

• Journal of Periodontal and Implant Science
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• 제51권1호
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• pp.30-39
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• 2021

Purpose: The present study was undertaken to examine whether periodontal probe visibility (PV) accurately reflects gingival thickness (GT) and to identify factors affecting PV using cluster and multivariate analyses. Methods: The clinical characteristics of the maxillary central incisors (n=90 subjects) were examined. Clinical photographs, sex, PV, probing depth, gingival width, papilla height, GT as measured with an ultrasonic device, and the ratio of crown width to crown length were recorded. Multivariate analysis, using multinomial baseline-category logistic regression, was used to identify factors predictive of PV. Cluster analysis was used to identify gingival biotypes. Results: In the multivariate analysis, sex was the only significant predictor of PV (odds ratio, 6.48). Two clusters of subjects were created based on morphometric parameters. The mean GT among cluster A subjects was significantly lower than that among cluster B subjects (P=0.015). No significant difference was found between cluster A and B subjects in terms of PV score (P=0.583). Conclusions: Periodontal PV was not associated with GT as measured directly using an ultrasonic device. Sex was a highly significant predictor of periodontal PV. GT was found to be correlated with morphological characteristics of the periodontium.

• Smart Structures and Systems
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• 제31권2호
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• pp.199-212
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• 2023

Nowadays fuzzy logic in control applications is a well-recognized alternative, and this is thanks to its inherent advantages. Generalized type-2 fuzzy sets allow for a third dimension to capture higher order uncertainty and therefore offer a very powerful model for uncertainty handling in real world applications. With the recent advances that allowed the performance of general type-2 fuzzy logic controllers to increase, it is now expected to see the widespread of type-2 fuzzy logic controllers to many challenging applications in particular in problems of structural control, that is the case study in this paper. It should be highlighted that this is the first application of general type-2 fuzzy approach in civil structures. In the following, general type-2 fuzzy logic controller (GT2FLC) will be used for active control of a 9-story nonlinear benchmark building. The design of type-1 and interval type-2 fuzzy logic controllers is also considered for the purpose of comparison with the GT2FLC. The performance of the controller is validated through the computer simulation on MATLAB. It is demonstrated that extra design degrees of freedom achieved by GT2FLC, allow a greater potential to better model and handle the uncertainties involved in the nature of earthquakes and control systems. GT2FLC outperforms successfully a control system that uses T1 and IT2 FLCs.

• 대한임상검사과학회지
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• 제45권4호
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• pp.149-153
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• 2013

Candidiasis is a fungal infection of the most common causes; generally, opportunistic infections occur often in patients with weakened immune systems. Because of high rates in fungal infection patients and increasing frequency of being isolated from clinical materials, quickly identifying of Candida albicans is critical. By identifying 404 yeast cell strains of referred samples via API 20C kits, NGL and PRO tests and Germ tube (GT) test were conducted and compared. In the 3.0 McFarland yeast cells, 0.1% ${\rho}-nitrophenyl-N-acetyl-{\beta}-D-galactosaminide$ (NGL) and 0.04% ${\small{L}}$-proline ${\beta}$-naphtylamide (PRO) were each put in test tubes and incubated at $35^{\circ}C$ for 15, 30, 60 and 90 minutes. Afterwards, 1 drop of 2% NaOH was applied, and if the color turned yellow; it was positive for NGL test. Afterwards, 1% ${\rho}$-dimethylaminocinnamaldehyde was applied, and if the upper layer turned pink or red, it was positive for PRO test. NGL and PRO tests were conducted for all C. albicans and identified accurately within 30 minutes. In NGL, PRO test, false-positive, negative were not seen, whereas, GT test showed false-positive in 1 strain and false-negative in 3 strains. Therefore, sensitivity and specificity of NGL, PRO tests were 100% and 99.5%, respectively, and positive and negative predictive rate were 99.5% and 100%, respectively. However, GT test sensitivity and specificity were 98.5% and 99.5%, respectively, and positive and negative predictive rates were 99.5% and 98.5%, respectively. In conclusion, NGL, PRO tests are better than GT tests for sensitivity and specificity, therefore, these reliable tests will be useful in clinical laboratories.

• 한국식품과학회지
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• 제41권1호
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• pp.100-105
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• 2009

양념 돈육의 저장성 증진 및 기능성 보강용 돈육 양념소스 소재를 개발하기 위해 산사, 차조기, 현초, 하수오의 생리활성을 검토하였다. Gram positive 5균주와 Gram negative 5균주에 대한 항균활성을 검정한 결과 산사와 현초가 가장 넓은 항균 spectrum을 보였다. 열처리 온도가 높을수록 추출물의 항균 활성은 다소 감소하였으나 열처리 후에도 잔존하였다. 0.1% 산사, 차조기, 현초, 하수오 에탄올 추출물의 총 폴리페놀 함량은 각각 66.24 mg/g, 28.97 mg/g, 96.51 mg/g, 그리고 13.33 mg/g를 나타내어 현초가 가장 높았다. 현초의 DPPH 라디칼 소거능은 0.1, 0.5, 1.0%에서 각각 56.79, 92.24, 97.56%를 보였으며, 산사, 차조기, 현초, 하수오 추출물 중 DPPH 라디칼 소거능은 현초 추출물이 가장 높았으며 산사, 차조기, 하수오 순이었다. 추출물의 아질산염 소거능은 0.1% 농도에서 산사, 차조기, 현초 추출물은 각각 19.66, 1.66, 3.86%를 나타내어 산사가 가장 높았다. 각 추출물의 지방 산패 억제도는 산사 89.99%, 차조기 88.57%, 현초 99.71% 그리고 하수오는 43.21%로 현초가 가장 높았다. 추출물을 $121^{\circ}C$에서 15분 동안 열처리한 후 DPPH 라디칼 소거능은 산사는 감소하였으며, 차조기와 현초는 증가하였다. 산사, 차조기의 아질산염 소거활성은 열 처리 후에 다소 감소하기는 하였으나, 잔존하는 것으로 보였다. 열처리 후 지방 산패 억제도는 산사를 제외한 차조기, 현초에서는 다소 감소하였으나, 열처리 후에도 50${\sim}$99.8% 범위의 높은 활성을 보였다.

• Restorative Dentistry and Endodontics
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• 제26권5호
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• pp.418-435
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• 2001

Root canal preparation process is of utmost importance in successful treatment of root canal. Also, one of the most important purpose of the root canal preparation is to enlarge the root canal three dimensionally without changing the curvature of the root canal However as the curvature of the root canal increases, there are many difficulties involved in formation of optimum root canal. Therefore in order to solve the above mentioned problems, new developments in methods of root canal preparation and equipments for such purposes were made. Recently, vigorous studies about newly introduced engine-driven nickel-ti-tanium rotary file are conducted. As shown in research results to dates, it is well established that the use of nickel-titanium file is better suited for curved root canal than stainless steel file in maintaining the curvature or root canal and reducing the deformation of root canal. However it is also acknowledged that there are a few discrepancies in research results according to protocol, due to failure to remove variables in experiments. In addition, although it is recommended by the manufacturer that the GT rotary file should maintain a low rotational speed of 150~350rpm and 'light pressure' as light as not to break the lead of a pencil, academic studies about the vertical force which is not yet standardized are not sufficiently explored. Therefore, this research devised and utilized a special research equipment to standardize the appropriate range of vertical force for GT rotary file through experiments by breaking of the lead of a pencil as expressed by the manufacturer and to accurately measure factors involved through repeating and recreating the environment of root canal preparation. Forming nine experimental groups by varying the vertical forces (150g. 220g, 300g) and rpm (150rpm, 250rpm, 350rpm), the effects of changing vertical forces and rpm on working efficiency were measured in terms of time expended in root canal preparation by crown-down method using a transparent resin block with 35 degree curvature and GT rotary file (z-test). The following research using this special research equipment that involved nine experimental groups and varying the vertical force for root canal preparation from 300g which is within the normal vertical force range to 700g and 1000g which fall outside the normal rpm range. The results were as follows : 1. Analysis of the experiment results revealed that the time spent in root canal preparation decreased as the vertical forces and rpm increased (p<0.05). Also, the effects of rpm were greater than those of the vertical forces within the normal vertical force range ($\beta$-weight test). 2. Observation of the deformation of GT rotary file revealed that deformation increases in a direct correlation with the vertical force increase and in a reverse correlation with the rpm decrease. In the case of the vertical forces close to the normal range, the probability of GT rotary file deformation were quite different depending on the rpm changes. In the case of greater vertical forces, the occurrences of deformation of the file were more frequent regardless of the rpm changes. 3. Deformation and breakage of file were also commonly observed in the expended time measurement experiments and GT rotary file deformation experiments in which low speed rpm (150rpm) was used and at the curved portion of the resin block.

• Annals of Clinical Neurophysiology
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• 제15권1호
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• pp.27-29
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• 2013

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2001년도 가을 학술발표회 발표논문집
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• pp.102-104
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• 2001

본 연구는 방향족 화합물질 중 페놀폐수에 대한 생물학적 처리를 위해 본 실험실에서 분리한 페놀분해능이 우수한 Rhodococcus sp. EL-GT를 이용하여 catechol 분해 catechol 1,2-dioxygenase 분해활성을 측정하였고, 이것이 ortho-pathway임을 확인할 수 있었다. 또한 다른 연구에서 보고된 Rhodococrus rhodochrous NCIMB 13259 균주의 catechol 1,2 dioxygenase를 기초로한 primer를 이용하여 PCR을 수행하였으며 이 분해 유전자의 cloning실험을 수행 중이다. 이들 실험을 통하여 Rhodoroccus sp. EL-GT의 페놀분해 균의 유전적 구조 및 특성을 검토하고 이를 이용하여 방향족 화합물의 분해능이 보다 우수한 균주의 개발을 시도하고자 한다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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• pp.549-551
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• 2001

본 연구는 방향족 화합물질 중 페놀폐수에 대한 생물학적 처리를 위해 본 실험실에서 분리한 페놀분해능이 우수한 Rhodococcus sp. EL-GT를 이용하여 catechol 분해 catechol 1,2-dioxygenase 분해활성을 측정하였고, 이것이 ortho-pathway임을 확인할 수 있었다. 또한 다른 연구에서 보고되 Phodococcus rhodochrous NCIMB임을 확인할 수 있었다. 또한 다른 연구에서 보고된 Rhodococcus rhodochrous NCIMB 13259 균주의 catechol 1,2 dioxygenase를 기초로한 primer를 이용하여 PCR을 수행하였으며 이 분해 유전자의 cloning실험을 수행 중이다. 이들 실험을 통하여 Rhodococcus sp. EL-GT의 페놀분해 균의 유전적 구조 및 특징을 검토하고 이를 이용하여 방향족 화합물의 분해능이 보다 우수한 균주의 개발을 시도하고자 한다.