• 한국환경생태학회지
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• 제29권6호
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• pp.873-883
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• 2015

2012년 8월부터 2013년 4월까지 양재천의 어류상과 복원 후 특성을 조사하였다. 조사기간 동안 채집된 어류는 총 5과 18종 1,503개체가 확인되었다. 하천복원 이후 양재천에 서식하는 담수어류 분포 조사결과 피라미(Zacco platypus)와 버들치(Rhynchocypris oxycephalus) 개체군이 높게 나타났다. 양재천에 서식하는 피라미 개체군의 전장 빈도 분포 결과 총 4단계의 연령대가 추정되었으며, 27~63mm (Age $0^+$)가 51.3%로 가장 높게 나타났다. 피라미의 전장-체중 상관도의 회귀계수 b값은 3.27, 비만도지수 slope는 양의 값으로 안정적인 생육상태를 유지하고 있었다. 내성도와 섭식도 길드 분석 결과 하류로 내려갈수록 민감종과 충식종은 개체수 풍부성이 감소하고, 내성종과 잡식종은 증가하였다. 군집지수와 IBI지수를 활용한 주성분 분석 결과 조사시기에 따라 구분되었으며, 1차와 2차조사시 특정 단일종 개체군의 영향이 높고, 3차조사시 다양한 어류의 개체수가 균등하게 서식하는 것으로 분석되었다.

• 한국작물학회지
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• 제58권1호
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• pp.36-42
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• 2013

벼 재배시 화학비료를 대체하기 위한 유기질비료의 활용성 시험에서 유기질비료의 사용 후 토양의 화학적 특성에서는 pH와 유기물함량은 유기질비료의 시비량이 많을수록 증가하는 경향을 보이고 있다. 생육특성 면에서도 대조구와 비교하여 생육초기에는 유기질비료와 화학비료를 같이 사용한 처리구가 높게 나타나고 있으나 생육후기에서는 유기질비료를 12 kg/10 a를 시비한 처리구7이 엽면적과 생체중, 건물중이 가장 높은 수준이었으며 수량구성요소 면에서는 영화수나 등숙비율은 유의차는 인정되지 않았으며 수량 면에서도 대조구와 처리구들이 10 a당 500 kg이상의 수량을 보였고 가장 높은 수량은 처리구7이 538 kg/10 a 나타내고 있으며 미질특성 면에서도 대조구와 비교하여 유기질비료의 시비에 따라 큰 차이가 나타나지 않고 있다. 벼 재배시 유기질비료로 화학비료를 대체하기 위하여 본 실험을 진행한 결과 유기질비료를 시비할 시에는 토양의 물리성이 개선되는 효과가 나타났으며 벼의 수량구성측면과 현미의 품질측면에도 관행적으로 시비하던 화학비료와 비교하여 큰 차이가 없어 유기질비료는 화학비료를 대체할 수 있는 비료로서의 효과가 입증되었으며 합리적인 사용량은 10 a당 267 kg을 사용하는 것이 품질과 수량확보 면에서 유리한 것으로 판단된다.

• 한국산학기술학회논문지
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• 제15권5호
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• pp.3304-3311
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• 2014

식물성지방산 고형비누는 검화법으로 제조 후 수분증발 및 경도를 위하여 건조과정이 필요하다. 본 연구에서는 합성향료를 대체하여 휘발성이 높은 에센셜오일을 혼합하여 비누 제조시 비누에 포함된 에센셜오일(라벤더오일)의 주요 향기성분(리나롤, 리나릴 아세테이트)이 건조기간 및 첨가물(이산화티탄)에 따라 변하는 향의 지속기간을 GC-MS를 이용하여 비교 관찰하고자 하였다. 그동안의 연구는 식물성고형비누의 사용성에 관한 연구가 대부분이었으며, 향의 휘발성과 관련된 연구는 미비한 상태이다. 비누에 포한된 리나롤의 휘발성은 이산화티탄을 혼합한 비누가 12주까지 감소율이 높게 나타났으나, 20주가 되는 시점에서는 유사한 수준으로 감소되었다. 리나릴 아세테이트는 이산화티탄의 혼합여부에 따라 약간의 차이를 보이기는 했으나 20주경과 시점까지 휘발성이 유사하게 나타났으며, 건조 20주 동안 리나릴 아세테이트보다 리나롤의 잔존율이 이산화티탄의 혼합여부와 상관없이 높게 나타났다. 상온에서 2일정도의 지속성을 갖는 라벤더 에센셜오일의 향 성분이 식물성 지방산 고형비누와 혼합하여 제조시 20주(5개월)동안 비누에 잔존하고 있음을 확인 할 수 있었다.

• 보존과학연구
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• 통권22호
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• pp.115-132
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• 2001

No. 3 Tomb of Bogam-ri, in Naju City, Chollanam-do Province, was a site excavated and inspected from 1996 to 1998 and had a various grave forms, including jar-coffins, stone-chambers and stone-cists. Although most of the metal artifacts excavated from it were severely corroded, we could implement microstructure investigation by collecting samples from the iron axes, iron coffin-nails and iron clamps in which the metal parts were remained. The metal structures were inspected by using metallographic microscope and SEM, and fine components analysis was implemented by ICP. To examine the hardness differences in accordance with the structure distribution, we measured the hardness by structures with Vickers hardness testing machine. As a result of the metal structure inspection, most of them were pure iron, ferrite, and also pearlite, cementite and widmannstaten structures were displayed. We could confirm carbonization was formed on the surface of the iron axes-B, iron coffin-nails-B, and iron clamps-A. There was no carbonization in the rest of the artifacts, and it is not certain that whether the carbonized parts were peeled off through extreme corrosion or they were not carbonized when they were made. In the particular part of a blade, the quality of the material was strengthened through processing. Due to the processing re-grain was caused and fine grain particles were formed. As a result of the ICP component analysis, there were no addition atoms because pure irons were used as materials. In the mean time, No. 17 jar-coffin where the iron axes-A are excavated, is chronologically ordered as from the late-fourth century to the mid-fifth century, and No. 1 and No. 2 stone chambers, where the rest of the artifacts were excavated, as the early-sixth century. It was difficult to relate the periodic differences with the manufacture technique artifacts which we inspected because there were no distinct characteristics of the manufacture technique of the metal structures and it is impossible to conclude the artifacts and sites are at the same period although their periods are different.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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• pp.128.2-128.2
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• 2010

For stationary 1kW-class fuel cell systems to be used widely, it is essential to achieve dramatic improvements in system durability as well as cost reduction. In order to address this engineering challenge, it is important to develop innovative technologies associated with BOP components. According to this background, in 2009, the Korean Government and "Korea Institute of Energy Technology Evaluation and Planning(KETEP)" launched into the strategic development project of BOP technology for practical applications and commercializations of stationary fuel cell systems, named "Technology Development on Cost Reduction of BOP Components for 1kW Stationary Fuel Cell Systems to Promote Green-Home Dissemination Project". The objectives of this project are to develop fundamental technologies to meet these requirements, and to improve the performance and functionality of BOP components with reasonable price. The project consortium consists of Korea's leading fuel cell system manufacturers, BOP component manufacturers which technologically specialized, and several research institutions. This paper is to provide a summary of the project, as well as the achievements made through the 1st period of the project(2009~2010). Several prototypes of BOPs - Cathode air blowers, burner air blowers, preferential oxidation air blowers, fuel blowers, cooling water pumps, reformer water pumps, heat recovery pumps, mass flow meters, valves and power conditioning systems - had been developed through this project in 2010. As results of this project, it is expected that a technological breakthrough of these BOP components will result in a substantial system cost reduction.

• 대한소아치과학회지
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• 제26권1호
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• pp.32-37
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• 1999

항시 장착이 가능한 reverse twin block 장치에 기능의 장애를 받지 않고도 lip pad의 효과를 첨가하기 위하여 가철식으로 lip pad를 제작하여 III급 부정교합의 치료에 적용해 본 결과 다음과 같은 결론을 얻었다. 1. Reverse twin block 장치는 장착한 상태에서 lip pad의 착탈을 통하여 정상적인 저작, 발음 등의 기능을 할 수 있으며 심미적이므로 III급 부정교합의 치료에 있어 상하악이 분리되어 있지 않은 다른 기능성 장치가 가진 단점을 극복할 수 있었다. 2. 본 증례에서는 저발육된 상악에 대한 효과적인 작용을 하는 lip pad를 가철식으로 제작하여 기능의 장애를 받지 않고도 양호한 치료효과를 얻을 수 있었다.

• 건축역사연구
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• 제13권1호
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• pp.35-51
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• 2004

The object of this study is upper class house in Yang-dong village with the purpose of spatial-sociological study of traditional Korean architecture. Space is the basic element of architecture and is fundamental for understanding architecture. Space, however, can be better understood through its social context rather than through its physical or psychological attributes. Space exists in a society, providing the physical environment which frames it Social environment affects the thoght of people who are members of that society. Space is built by the people in a society and is affected by their thought. Spatial-sociological study can explain a mutual relation between people and space through context. It defines characteristics of space based on mutual relations which exist among the people, the culture of society and the environment of society but also having a sociological component, study of architectural space should consider the social context. Since architectural space is built on social and cultural bases, to understand it requires various methods of study Spatial-sociological analysis is one alternative. Using space syntax, this study analyzes houses in Yang-dong village by not only defining attributes of individual houses, but also common attributes of houses in the village. Based on common attributes of houses in the village, the attributes of Yang-dong village houses can be re-defined within the social context. the results from a spatial-sociological analysis of upper class housing of the Yang-dong village are as follows; (1) Related to confucian ideas in Chosun Dynasty : A house has a dualistic center organized with 'an-chae' and 'sarang-chae'. 'an-chae' space is organized unsociably from outside. (2) Related to various space pattern of Yang-dong village House in the Chosun Dynasty period :As variations in the types of space pattern, the village house exhibit different attributes.

• 한국의상디자인학회지
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• 제18권1호
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• pp.35-50
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• 2016

As the fashion industry increasingly fierce competition in the market we are elements of product quality can only be differentiated through a difficult period. Because academia and strengthen brand image and measures proposed business, a way to strengthen advertising and promotional marketing. However, this action reminds consumers that have a direct feel of the experience with the product is very easy to see, but counterproductive when advertising and contradictions. Korean fashion brand has sufficient capacity in this part of the judgment, because reason can not spread to the global luxury fashion brand. This study analyzed who help give identity to the domestic fashion luxury brand global strategy angry, it is part of the goal of the current development and product strategy features. Export capabilities, improve product identification components for their product development strategy has been carried out case studies and the recommendations based on this identity-based international luxury fashion brand analysis. The concept of product identification is not strong, the lack of previous studies of this study also adopted the international luxury fashion brand case studies, based on the country. The importance of product identification and product identification research methods derived from the characteristic side also granular component. Then there is the need to achieve national identity customized product development strategy for domestic enterprises to further expand the practice target. This will help enhance the competitiveness of the domestic apparel design.

• 한국과학교육학회지
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• 제17권3호
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• pp.323-332
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• 1997

In order to use analog more systematically in science class, an instructional model was designed on the basis of analogical reasoning processes (encoding, inference, mapping, application, and response) in the Sternberg's component process theory. The model has five phases (introducing target context, cue retrieval of analog context, mapping similarity and drawing target concept, application, and elaboration), and the instructional effects of using the model upon students' comprehension of science concepts and motivation level of learning were investigated. The treatment and control groups (1 class each) were selected from 8th-grade classes and taught about chemical change and chemical reaction for the period of 10 class hours. The treatment group was taught with the materials based on the model, while the control group was taught in traditional instruction without using analog. Before the instructions, modified versions of the Patterns of Adaptive Learning Survey and the Group Assessment of Logical Thinking were administered, and their scores were used as covariates for students' conceptions and motivational level of learning, respectively. Analogical reasoning ability test was also administered, and its score was used as a blocking variable. After the instructions, students' conceptions were measured by a researcher-made science conception test, and their motivational level of learning was measured by a modified version of the Instructional Materials Motivation Scale. The results indicated that the adjusted mean score of the conception test for the treatment group was significantly higher than that of the control group at .01 level of significance. No significant interaction between the instruction and the analogical reasoning ability was found. Although the motivational level of learning for the treatment group was higher than that for the control group, the difference was found to be statistically insignificant. Educational implications are discussed.

• 비파괴검사학회지
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• 제31권5호
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• pp.536-542
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• 2011

원자력발전소의 이종금속 용접부는 PWSCC 결함에 민감한 것으로 알려져 있으며 기량검증된 검사자가 기량검증된 절차서를 사용하여 가동중검사 기간 중에 주기적인 검사를 수행하고 있다. 국내 원자력발전소 이종금속 용접부의 형상 조사 결과에 따르면 대부분의 이종금속 용접부가 경사진 노즐부나 인접부에 위치하는 것으로 나타났다. 일반적인 초음파 탐촉자를 사용하여 경사부위에 위치한 이종금속 용접부의 검사를 수행할 경우 초음파 탐촉자의 접근성이 제한되어 검사체적을 모두 검사하기가 어렵다. 특히 축방향 결함 검출을 위한 원주방향 주사에서는 초음파 탐촉자가 경사면에 위치하게 되면 반사체로부터 결함 신호를 얻기 가 어려우며 이에 따라 결함 검출이 어렵게 된다. 이러한 문제점을 극복하기 위해서는 경사면을 고려하여 비틀림 각도를 적용한 초음파 탐촉자를 사용하는 것이 필요하다. 모델링을 통하여 비틀림 굴절 종파탐촉자 를 설계하고 축방향 결함 검사용 비틀림 굴절 종파탐촉자를 제작하여 실험을 통하여 결함으로부터 신호를 취득하였다. 일반 탐촉자와 비틀림 각도가 적용된 탐촉자의 초음파 응답신호를 비교한 결과 비틀림 각도가 적용된 탐촉자의 초음파 응답신호가 훨씬 뛰어난 것으로 나타났다.