• 대한치과교정학회지
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• 제31권2호통권85호
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• pp.187-197
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• 2001

전통적 교정술식인 edgewise technique으로 치료한 경우 잔여성장, 안모 유형과 발치 여부가 안모고경에 미치는 영향과 요소를 알아보고자 165명을 대상으로 조사하였다. 이 대상군들은 SN-GoGn angle, Frankfort mandibular plane angle, Occluso-mandibular plane angle을 이용하여 수직 비발치군, 수직 발치군, 수평 비발치군, 수평 발치군으로 구분하였다. 치료 전후에 두부계측방사선사진을 계측하고 통계처리하여 다음과 같은 결론을 얻었다. 1.모든 군에서 치료 후의 전하안모고경, 전안모고경, 후안모고경이 유의하게 증가하였으며 상하악 구치고경이 유의하게 증가하였다. 2. 치료 전후의 안모고경 변화에서 수직, 수평 안모 유형 간에 유의한 차이는 인정되지 않았다. 3. 발치군과 비발치군 간의 안모고경 변화는 유의한 차가 없었다. 4. 전하안모고경의 변화량이 성장군에서 상악 구치고경의 변화와, 성인군에서 하악 구치고경의 변화와 유의한 상관성을 보였다. 5. 전하안모고경의 변화량에 영향을 미치는 요소는 뚜렷하지 않았다.

• Journal of Oral Medicine and Pain
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• 제34권3호
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• pp.277-294
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• 2009

본 연구의 목적은 II급 청소년, 성인 환자에서 발치와 비발치 후 연조직 변화를 비교하기 위한 것이었다. 원광대학교 치과병원 교정과에 내원한 환자 68명을 각각 청소년발치군, 청소년비발치군, 성인발치군, 성인비발치군으로 분류하여 치료 전후의 측모 두부방사선사진을 계측하였다. 각 군의 치료 전후를 비교하고 각 군 간의 변화량을 비교하였으며, 그 중 통계적으로 유의한 변수들의 상관성과 회귀분석을 하여 다음과 같은 결과를 얻었다. 청소년과 성인의 발치군에서 비순각은 유의하게 증가하였고 비발치군에서는 유의하게 감소하였다. 발치군에서는 vertical-U1과 E line-upper lip의 변화량 간에, vertical-U1과 E line-lower lip의 변화량 간에, vertical-L1과 vertical-Li의 변화량 간에 양의 상관관계를 보였다. 또한 발치군에서 회귀분석을 통해 E line-upper lip, E line-lower lip, Li에 대한 단순회귀방정식이 도출되었다.

• 한국식품영양학회지
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• 제17권4호
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• pp.412-419
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• 2004

쇠고기 엑기스 분말로부터 방사선 조사 휘발성 화합물의 검출에 의한 새로운 검지방법의 개발을 위한 기초 자료를 마련하고자 S-PD 법, S-CD 법, P&T 법 및 LLCE 법 등 4종의 방법을 대상으로 휘발성 화합물의 추출을 위한 최적의 방법을 선정하고자 하였다. 그 결과 쇠고기 엑기스 분말로부터 탄화수소류, 알데히드류, 케톤류, 알콜류, 함황화합물류, 함질소화합물류, 방향족화합물류, 테르펜류, 푸란류 및 기타 화합물류로 구성된 106종의 휘발성 화합물이 검출되었으며, 이 중 S-PD법에 의해 62종의 화합물이 검출됨으로써 가장 많은 화합물을 나타내었고, 다음으로 P&T 법(43종), LLCE 법(38종) 및 S-CD 법(30종) 순이었다. S-PD 법은 RI 1200 이상의 휘발성이 약하며 분자량이 높은 화합물에 대한 검출능이 높았고, P&T 법은 RI 1200 이하의 화합물의 검출능이 높은 경향을 나타냄으로서, 위 두 방법은 상호보완적인 경향을 나타내었다. 한편 S-CD법에 의해 검출된 화합물은 3종을 제외하고 S-PD 법에 의해서도 검출 가능하였으며, LLCE 법의 경우는 5종의 화합물을 제외하고 S-PD 법과 P&T법을 병용할 경우 모두 검출 가능한 화합물로 구성되어 있었다. 따라서 비극성 fiber(PDMS/DVB)를 사용한 SPME 법과 P&T 법을 병용하는 방법이 쇠고기 엑기스 분말의 휘발성 화합물을 추출하기 위한 최적의 방법으로 선정되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권10호
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• pp.1386-1398
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• 2010

Soybean contains a high concentration of carbohydrates that consist mainly of non-starch polysaccharides (NSP) and oligosaccharides. The NSP can be divided into insoluble NSP (mainly cellulose) and soluble NSP (composed mainly of pectic polymers, which are partially soluble in water). Monogastric animals do not have the enzymes to hydrolyze these carbohydrates, and thus their digestion occurs by means of bacterial fermentation. The fermentation of soybean carbohydrates produces short chain fatty acids that can be used as an energy source by animals. The utilization efficiency of the carbohydrates is related to the chemical structure, the level of inclusion in the diet, species and age of the animal. In poultry, soluble NSP can increase digesta viscosity, reduce the digestibility of nutrients and depress growth performance. In growing pigs, these effects, in particular the effect on gut viscosity, are often not so obvious. However, in weaning piglets, it is reported that soy oligosaccharides and soluble NSP can cause detrimental effects on intestinal health. In monogastrics, consideration must be given to the anti-nutritive effect of the NSP on nutrient digestion and absorption on one hand, as well as the potential benefits or detriments of intestinal fermentation products to the host. This mirrors the needs for i) increasing efficiency of utilization of fibrous materials in monogastrics, and ii) the maintenance and improvement of animal health in antibiotic-free production systems, on the other hand. For example, ethanol/water extraction removes the low molecular weight carbohydrate fractions, such as the oligosaccharides and part of the soluble pectins, leaving behind the insoluble fraction of the NSP, which is devoid of anti-nutritive activities. The resultant product is a high quality soy protein concentrate. This paper presents the composition and chemical structures of carbohydrates present in soybeans and discusses their nutritive and anti-nutritive effects on digestion and absorption of nutrients in pigs and poultry.

• Fisheries and Aquatic Sciences
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• 제25권5호
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• pp.264-275
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• 2022

A non-destructive environmental DNA protocol for the genetic analysis of sea cucumber (Apostichopus japonicus) resources DNA was established. Among the several commercial DNA extraction kits, the DNeasy^® Plant Mini Kit was selected as the best choice to obtain the high-quality genomic DNAs from the mucous sea cucumber. As the temperature and incubation time increased, the amount of extracted environmental DNA was also large, but it was judged that the increased amount did not affect as much as 2-3 times. Therefore, these conditions were not considered to be the main factors to consider in actual environmental DNA extraction. However, the amount of seawater relative to the size of the sample was judged as a major consideration, and a sufficient amount of environmental DNA for analysis was secured when stored within 1 min while stirring the volume of seawater corresponding to the total sea cucumber weight (g). In securing the environmental DNA of sea cucumbers, the mortality rate of sea cucumbers in all experiments was 0, and it was judged that the effects of sea cucumbers were not significant through this treatment. Through the results of this study, sea cucumber DNA research, which has been conducted in a destructive method, can be conducted non-destructively through environmental DNA analysis. Through this study, we have secured a standard protocol that can successfully extract the sea cucumber DNA through environmental DNA. It is not only excellent in terms of time and cost of traditional DNA analysis method currently used, but it is completely non-destructive in the ecosystem of the survey area. It is believed that the system can be transformed in a way that does not affect it. However, it is thought that various standard protocols should be established considering the characteristics of each type.

• Restorative Dentistry and Endodontics
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• 제38권1호
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• pp.48-51
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• 2013

The autogenous tooth transplantation is an alternative treatment replacing a missing tooth when a suitable donor tooth is available. It is also a successful treatment option to save significant amount of time and cost comparing implants or conventional prosthetics. These cases, which required single tooth extraction due to deep caries and severe periodontal disease, could have good results by transplanting non-functional but sound donor tooth to the extraction site.

• ETRI Journal
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• 제29권2호
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• pp.243-245
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• 2007

This letter presents a new feature extraction method based on the private energy map (PEM) technique to utilize the energy characteristics of a facial image. Compared with a non-facial image, a facial image shows large energy congestion in special regions of discrete cosine transform (DCT) coefficients. The PEM is generated by energy probability of the DCT coefficients of facial images. In experiments, higher face recognition performance figures of 100% for the ORL database and 98.8% for the ETRI database have been achieved.

• Nuclear Engineering and Technology
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• 제52권9호
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• pp.2034-2040
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• 2020

The gas evolution from mixtures consisting of 0.2 M solution of N,N,N',N'-tetra-n-octyldiglycolamide (TODGA) in n-alcohol (n-decanol or n-nonanol) with Isopar-M diluent was investigated during thermal oxidation. The effect of ionizing radiation on their thermal stability has been studied. It has been determined that the volume of gaseous thermolysis products increases by 260% in the case of n-nonanol and 80% in the case of n-decanol compared to non-irradiated solutions. It has been shown that the gas evolution rate and gas volume increase when the irradiated mixture saturated with nitric acid is heated. However, there are no prerequisites for the development of autocatalytic oxidation.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2005년도 추계학술대회 학술발표 논문집 제15권 제2호
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• pp.271-275
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• 2005

In this research, we propose a Unified Fuzzy rule-based knowledge Inference Systems UFIS) to help the expert in cosmetic brand detection. Users' preferred cosmetic product detection is very important in the level of CRM. To this Purpose, many corporations trying to develop an efficient data mining tool. In this study, we develop a prototype fuzzy rule detection and inference system. The framework used in this development is mainly based on two different mechanisms such as fuzzy rule extraction and RDB (Relational DB)-based fuzzy rule inference. First, fuzzy clustering and fuzzy rule extraction deal with the presence of the knowledge in data base and its value is presented with a value between $0\∼1$. Second, RDB and SQL(Structured Query Language)-based fuzzy rule inference mechanism provide more flexibility in knowledge management than conventional non-fuzzy value-based KMS(Knowledge Management Systems)

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 춘계학술대회
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• pp.557-560
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• 2007

The durability of 80 kW class stack module was tested in hydrogen recirculation and non-recirculation systems with the condition of 300Amps (constant current mode) and hydrogen pulse purging (10 seconds close/0.8 seconds open). A localized membrane failure in the interfacial area between membrane and sub-gasket, carbon corrosion in cathode electrode, and Pt dissolution/extraction have been found through the post mortem analysis such as CV, Impedance, SEM, and so on. The main reason of these mechanisms will be discussed in this study.