• 한국작물학회지
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• 제43권1호
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• pp.6-10
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• 1998

This study was conducted to obtain basic information on the development of new triticale cultivars with good quality and high productivity for soiling feed. Twelve cultivars introduced from Poland, Canada and two cultivars developed in Korea were planted in the experimental field at Ansong National University in 1995. Major growth traits and nutrient components for feed were measured and analyzed using principal component analysis and average linkage cluster analysis. 'Prego', 'Prag 46/3', and 'Clercal' were relatively high in forage yield. Most of forage nutrient contents except cellulose were higher in Prego, Clercal, and 'Cumulus' than other cultivars. Results of principal component analysis on 11 traits including forage yield and nutrient contents showed that 72.59% of total variation were explained by the first and second principal components. The Z$_1$ had high correlation with the contents of forage nutrient components and Z$_2$ with plant height, fresh, and dry weight. Fourteen cultivars were classified into 7 groups by multivariate analysis. Clercal and Prego in Group I could be useful source for the improvement of triticale as an important forage crop because they exhibited high productivity as well as high contents of nutrient components for feed.

• 항공우주시스템공학회지
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• 제11권2호
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• pp.16-22
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• 2017

본 논문에서는 항공, 바이오 및 원자력 부품들에서 발생하는 프레팅 마모 현상이 비교 연구되었다. 프레팅 마모 손상에 영향을 미치는 실험적 인자들을 확인하였으며 각 부품에서 관찰된 실험 인자들의 크기들을 직접 비교하였다. 초당 진동수, 상대적 변위, 그리고 수직하중의 크기는 프레팅 마모가 발생하는 부품에 따라 다양했다. 프레팅 마모 손상을 최소화시키는 최근 해결책들이 조사되었으며 저마찰 코팅 적층, 표면 처리, 기저 재료 및 접촉 형상 최적 설계 등이 해결책으로 소개되었다. 본 연구는 프레팅 마모 손상을 분석하고 마찰 부품을 설계하는데 유용한 방법과 해결책을 제공한다.

• Nuclear Engineering and Technology
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• 제55권11호
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• pp.4191-4203
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• 2023

Robotics applications are greatly needed in hazardous locations, e.g., fusion and fission reactors, where robots must perform delicate and complex tasks under ionizing radiation conditions. The drawback is that some robotic parts, such as active electronics, are susceptible to radiation. It can lead to unexpected failures and early termination of the robotic operation. This paper analyses the ionizing radiation effect from 0.09 to 1.5 Gy/s in robotic components (microcontrollers, servo motors and temperature sensors). The first experiment compares the performance of various microcontroller types and their actuators and sensors, where different mitigation strategies are applied, such as using Radiation-Hardened (Rad-Hard) microcontrollers or shielding. The second and third experiments analyze the performance of a 3-Degrees of Freedom (DoF) robotic arm, evaluating its components' responses and trajectory. This study enhances our understanding and expands our knowledge regarding radiation's impact on robotic arms and components, which is useful for defining the best strategies for extending the robots' operational lifespan, especially when performing maintenance or inspection tasks in radiation environments.

• 한국연초학회지
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• 제23권2호
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• pp.149-155
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• 2001

This study was carried out to evaluate the correlations among degree of carbonization, chemical components and chromatic characteristics, and to establish the criterion of carbonizaion in leaf tobacco during aging storage. The flue-cured (B2O) and burley (B2T) leaf tobaccos were redried with conventional practices for each other type, and moisture contents of leaf tobaccos were adjusted to 13, 15, 17 and 19% after redrying. The leaf tobaccos were packed in carton box and stored for 8 months in the controlled-environment rooms($35^{\circ}C$, 65% R.H. and $40^{\circ}C$, 80% R.H.). Degree of carbonization, chemical components, and chromatic characteristics(L ; black-white, a ; red to green, b ; yellow to blue) were invetigated every month. Carbonization Index (C.I.) was established as (equation omitted) in accordance with degree of carbonization in two types. The C.I. value of flue-cured leaf(56.5) for slight carbonization was higher than that of burley leaf(48.0). C.I. and rate of usable leaf, L and b were positively correlated in two types. C.I. was significantly shown positive correlation with pH in two types. The correlations between the predicted and the observed values of slight carbonizating times(month after storage) using C.I. and pH were positive significant in two types. The results suggest that cabonization index may be useful to forecast and prevent the carbonization, and pH may be useful to estimate cabonization indirectly for flue-cured and burley leaves during aging storage.

• 대한가정학회지
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• 제29권4호
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• pp.45-64
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• 1991

Each of us has personal and unique "Mental Images" of environment that are the results of a two-way process between an observer and his environment. By understanding of people's image on their physical settings through cognitive maps, congruent with their design environment. In this context, this study is to fine out the characteristics of the resident's image in apartment housing that are modern housing. This paper is theoretically based on Appleyard's cognitive maps types, Lynch's the components of image, Harrison and Howard's image enhancing factors and Applyard's image enhancing factors of buildings. For the purpose of this study, two-instruments were used. One was sketch mapping, that told of visual aspects of cognitive map. Another was verbal questionnaire, which was composed of nonvisual aspects of image components and image enhancing factors. For the methods of research analysis, Percentage, Frequency, and Chi-square test were used. The results of this study are as follows. Firstly, as for the types of cognitive maps, the rate of sequential maps and spatial maps are nearly same. Secondly, as for the components of images, landmarks and districts are significant elements in apartment housing, and edges, nodes and paths are rare element. Thirdly, with regard to image enhancing factors, landscaping is shown to be most effective at landmarks and districts. And finally, in examing the differences of images between various social groups, significant variables are years of living and housing size. Age and income are the next. In this study of image, we can learn about manner in which individuals come to see, understand, and cope with the environment at a personal level. So, user-oriented approach is useful in environmental design, and particularly, it is useful in the apartment housing of the future life space.

• 한국식품저장유통학회지
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• 제17권2호
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• pp.297-300
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• 2010

여러 가지 한약재의 추출물의 항알러지 활성을 증진시키기 위하여 장수상황버섯의 고체발효 중 시너지 효과를 확인하여 보았다. 그 결과 마황이 좋은 활성을 나타내어 DNFB (dinitrochlorobenzene)에 의해 유발된 접촉성 피부염 알러지 질환 동물모델에서 피부상피조직의 비후정도를 약 50%정도의 수준으로 완화시키며, 이는 면역조직화학적인 방법으로 확인하였다. 이 결과로, 마황 추출액의 장수상황버섯 고체발효의 최적 조건을 확립한다면 향장소재 또는 이의 조성물로 유용하게 이용될 수 있다고 판단된다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 춘계학술발표회
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• pp.61-61
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• 2018

Buckwheat is a important vegetable in asia for long time. Recently, Buckwheat has attracted attention to its potential for health benefit and especially as a gluten-free food. Conventional buckwheat studies have focused on seeds and sprouts, but we studied the components of the aerial parts and roots of buckwheat after harvesting. Therefore, we hope that this research will be a basic study to expand the application range of buckwheat plants which are discarded after harvesting. The ethanol extracts of aerial part and roots of buckwheat (Daegwan, Yangjul) were analysed using high performance liquid chromatography (HPLC). Rutin was detected as the major compound in Daegwan, Yangjul aerial part and Daegwan root extracts, except yangjul root extract. So we analysed Yangjul root extract using liquid chromatography-mass spectrometry (LC-MS) and then obtained the informations about the components in Yangjul root extract. Yangjul root extract was analysed by $LC-MS^n$ in negative ESI mode within the range m/z 150-2000 amu. Totally, four components was found in the Yangjul root extract and obtained the fragments ion patterns of ones. Further study, we have to confirm the structure of components in Yangjul root extract and try to more biological activity test the components for development as useful food or cosmetic ingredients.

• Journal of Mechanical Science and Technology
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• 제16권8호
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• pp.1095-1101
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• 2002

The load characteristics of engine main bearing are very important in the design of crankshaft and engine block. The stiffness of crankshaft and block, or the optimal dimension of the bearing can be determined according to the load level. This paper presents the load characteristics of engine main bearing. Two components of the main bearing load are measured during engine firing and motoring. The vertical and horizontal load components are measured by using the dynamic load cell mounted in each main bearing cap bolt. The measured main bearing loads are compared with calculated results by using the statically determinate method. The theoretical results, provided in this study, agreed well with the experimental results. The presented results are very useful for achieving optimal design of engine.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.3359-3364
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• 2007

The smart energy system is the integrated power system in which the power components including central station generation, distributed generation, renewable power generation, energy storage, and communications and controls are complexly connected with each other. In smart energy system, it is very important how to configure the diverse power generations and how to determine the operation mode of the chosen components with economic feasibility. In this study, we introduce the optimal planning method based on both economic feasibility and load profiles and its applications for the smart energy system in apartment. This method was considered very useful to determine the configuration and to decide the optimal operation mode of the smart energy system.

• Journal of Mechanical Science and Technology
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• 제20권9호
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• pp.1410-1417
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• 2006

The metal processing system usually consists of various components such like motors, work rolls, backup rolls, idle rolls, sensors, etc. Even a simple fault in a single component in the system may cause a serious damage on the final product. It is therefore necessary to diagnose the faults of the components to detect and prevent system failure. Especially, the defects in a work roll are critical to the quality of strip. It is especially difficult to detect faults of a roll by using the existing frequency analysis method if the speed of the roll is changing. In this study, a new diagnosis method for roll eccentricity under the roll speed changes was developed. The new method was induced from analyzing the rolling mechanism by using rolling force models, radius-speed relationship, and measured rolling force, etc. Simulation results by using the field data show that the proposed method is very useful.