자기효능감과 수업동기 및 학교생활적응간의 관계 탐색

김용래,유효현 弘益大學校 人文科學硏究所 2002 人文科學 Vol.10 No.-

The purpose of this examination was to find out the relationship among secondary school learners' self-efficacy, instructional motivation and school life-related coping. And in order to achieve the purpose of this examination sampled middle/high school learners in Seoul and other areas. The instruments used for the data collection were 「Self-efficacy Scale」 (Kim, A-Young, 1997), 「School Learning Motivation」 (Kim, Yong-Rae, 2000) and 「School Adjustment Scale」 (Kim, Yong-Rae, 2000). The collected data analysis were performed using SPSS/WIN(11.0V) program, and analysis Mean score(M), Standard Deviation(SD), Zero Order Correlation(r) and Multi-Regression Analysis All statistic values were tested by t-test and F-test in the significant level of p<05. And as for the major findings of this examination, 'self-efficacy', 'instructional motivation' and 'school life-related coping' were significantly positive correlation. And 'self-efficacy' and 'instructional motivation' were significantly positive influences on Korea secondary school learners' 'school life-related coping' respectively.

전자상거래가 농업경영 행태에 미치는 영향

권용대,김관후 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was focused on analyzing the impacts of e-commerce on the farmer's management behavior and suggesting alternatives for the development of e-commerce in agricultural industry. For this study, survey was conducted for 24 farmers who sell agricultural products through e-commerce in Chungnam province. The results of study are as follows; First, farmers have changed their management practices in terms of production, marketing and processing by using the information of consumers' preferences while doing e-commerce business. Second, farmers have attempted to differentiate their product through product brand and customer relationship marketing, because they recognized the importance of developing marketing techniques adapted to e-commerce system for more revenues. Third, if quality certification system of agricultural products is introduced under e-commerce, farmers would use it for their environmentally sounded farming because they expect to increase their income. Fourth, 75% of the farmers sold their product at retail price. It means that e-commerce farmers act as a price maker rather than price taker at e-commerce market, who will be encouraged to have larger business size resulting in more added value. Based on the results of study, we suggest that there should be reduction of service charge for credit card, and encouragement of B2B transaction for the economy of scale and introduction of quality certification system so as to establish e-commerce system of agricultural industry as soon as possible.

목탄분말의 입자크기가 양파 생육과 토양 이화학성에 미치는 영향

윤봉기,박인진,유영권,허원영,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.3

토양개량용으로 적합한 목탄의 입자크기를 구명하기 위하여 양파 재배 토양에서 참나무 목탄분말과 소나무 목탄분말의 입자크기를 각각 1 ㎜이하, 1~5㎜, 5~10㎜의 3처리로 하여 목탄분말을 500㎏/10a 수준으로 사용하고 2001년에 시험 한 결과는 다음과 같다. 1) 시험에 사용된 목탄의 화학적 특성은 참나무 목탄은 pH10.1, T-N 0.04%, P₂O_(5) 1.63%, K₂O 0.34%이었으며 소나무 목탄은 pH 9.3, T-N 0.24%, P₂O_(5) 2.18%, K₂O 0.33%이었다. 2) 수확기의 양파 생육은 초장 50.0~62.6㎝, 엽수 6.0~6.5매, 줄기직경 11.2~16.4㎜이었으며 1 ㎜이하 크기의 목탄 시용구에서 초장. 염수, 줄기직경 등 생육이 좋았다. 3) 목탄 입자크기에 따른 수량 구성요소는 1 ㎜이하 시용 구에서 구고. 구 직경, 구중 등이 좋았으며 수량도 목탄 입자크기 1 ㎜이하 시용구에서 많았다. 4) 시험후 토양 화학성은 토양 pH 5.9~6.3, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^(+)㎏^(-1), Avail. P₂O_(5) 147~186㎎ ㎏^(-1), Exch. K 0.35~0.41c㏖^(+) ㎏^(-1)으로 시험전 토양에 비하여 OM, CEC가 증가하고 Avail. P₂O_(5), Exch. K의 축적이 경감되었다. 5) 시험후 토양의 물리성은 용적밀도 1.20~l.24g ㎝^(-3), 고상 45.1~46.6%, 공극율 53.4~54.9% 이었으며 목탄 입자크기 1 ㎜이하 시용구에서 좋아지는 경향이었다. 6) 시험후 토양의 미생물상은 세균 64.3~200.4(×10^(5))cfu g^(-1),방선균 26.4~70.3(×10^(5)), 사상균 16.9~186.2(×10³))이었으며 <1㎜, 1~5㎜ 크기의 목탄 시용구에서 세균, 방선균, 사상균이 많은 경향이었다. This experiment was conduct to find out moderating particle size of wood charcoal powder for soil improvement in 2001 year. The wood charcoal material was a black oak and pine. The particle size of wood charcoal was 1㎜ below, 1~5 ㎜ and 5~10 ㎜. An amount of wood charcoal application was 500 ㎏ l0a^(-1), Chemical properties of a black oak charcoal used experiment was pH 10.1, T-N 0.04%, P₂O_5 1.63% and K₂O 0.34%. That of pine charcoal was pH 93, T-N 0.24%, P₂O_(5) 2.18%, K₂O 033%. At harvest stage of onion, plant height was 50.5~62.6㎝. The number of leaf was 6.0~6.5ea. Stem diameter was 11.2~16.4 ㎜. Plant height, the number of leaf and stem diameter of plot treated 1 ㎜ below wood char-coal were be longer, more or bigger than those of any other particle size. Onion height, diameter and weight of plot treated 1 ㎜ below wood charcoal was higher or bigger than that of any other particle size. Yield was similar to yield component. Soil chemical properties of after experiment was pH 5.9~63, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^+ ㎏^(-1), Avail. P₂O_(5) 147~486 mg ㎏^(-1) and Exch. K 035~0.41 c㏖+ ㎏^(-1). OM and CEC was increased than that of before experiment. Avail. P₂O_5 and Exch. K was decreased than that of before experiment. Soil texture after experiment was bulk density 1.20~4.24 g ㎝^(-1), solid phase 45.1~46.6%, porosity 53.4~54.9%. Soil texture was trend to be improved by l㎜ wood charcoal. Soil microflora after experiment bacteria 64.3~200.4(×10^(5))cfu g^(-1) actinomycete 26.4~70.3(×l0^(5))cfu g^(-1) and fungi 16.9~186.2(×10³)cfu g^(-1) Bacteria, actinomycete and fungi was much at plot treated with <1 ㎜, 1~5 ㎜ wood charcoal with out relation to wood charcoal material.

목탄분말의 원료수종이 양파 생육과 토양 이화학성에 미치는 영향

윤봉기,박인진,유영권,허원영,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.3

양파재배 토양에서 토양개량용으로 적합한 목탄의 원료 수종을 선발하기 위해서 관행(무처리)과 코코넛피트, 대나무, 참나무, 활엽수 수피, 소나무로 만든 목탄분말의 6처리로 시용량 500㎏· 10a^(-1)으로 하여 2002년에 시험한 결과는 다음과 같다. 1. 시험에 사용한 5종 목탄의 pH는 5.1~10.1, T-N 0.15~0.71%, P₂O_(5) 2.06~2.65%, K₂O 0.20~0.86% 범위였으며 1 ㎜이하 입자의 분포는 9.0~84.8%이었다. 2. 양파의 생육은 목탄시용으로 줄기직경이 크고 주당 엽수가 많은 경향이었으며 참나무, 활엽수 수피, 대나무 목탄처리 구에서 생육이 좋았다. 양파의 수량은 4,631~5,114㎏ 10a^(-1)으로 무처리(4,638㎏)에 비하여 구고가 크고 구중이 무거운 참나무목탄과 활엽수 수피 목탄처리구에서 각각 10%, 소나무 목탄구에서 3% 증수되었으며 유의성이 인정되었다. 3. 시험 후 토양의 물리성은 목탄 시용으로 용적밀도와 토양의 고상비율이 줄어들 고 액상과 기상, 공극율이 증가하는 경향을 보였다. 화학성은 코코넛 피트처리구 를 제외한 처리구에서 토양 pH가 개선되었고, OM, CEC 는 모든 처리구에서 증가하는 경향을 보였다. This experiment was conducted to find out moderating tree kinds of wood charcoal pow-der for soil improvement and onion growth in 2002 year. The wood charcoal materials were coconut peat, bamboo, black oak, pine, and broadleaf tree bark. Wood charcoal application rate was 500 ㎏ 10a^(-1). Results were summerized as follows; Chemical properties of wood charcoal used experiment were pH 5.11~10.1, T-N 0.15~0.71%, P₂O_(5) 2.06~2.65% and K₂O 0.20~0.86%. The particle size of <0.1 ㎜ was 9.0~84.8%. Onion growth of plot applied wood charcoal was better than that of plot not applied wood charcoal. The number of leaf and diameter of stem at plot applied wood charcoal was better than that of plot not applied wood charcoal. Growth of plot applied black oak charcoal, broadleaf tree bark char-coal, and bamboo charcoal was better than that of any other plot. Yield of plot applied wood charcoal was 4,631~5,114 ㎏ 10a^(-1). The yield of plot applied black oak charcoal, broadleaf tree bark charcoal and pine charcoal was increased 10, 10, 3% than that of control(4,638 ㎏ 10a^(-l)), respectively. It was significant at 5% level. Soil physical properties of after experiment was decreased bulk density and solid phase, but liquid phase, air phase and porosity were increased than that of control. Soil chemical properties of after experiment trend to be improved pH. Soil OM and CEC was increased than that of control.

목탄분말 시용량이 양파 생육 및 토양 이화학성에 미치는 영향

윤봉기,박인진,유용권,허원녕,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.2

양파재배 토양에서 목탄의 적정 사용량 및 토양개량 효과를 구명하기 위하여 참나무 목탄분말을 10a당 0(무처리), 300, 500, 1,000, 1,500, 2,000㎏ 수준의 6처리로 2000년에 시험한 결과는 다음과 같다. 1. 목탄 시용으로 양파생육이 좋아지는 경향이었으며 10a당 300㎏시용에서 초장, 엽수, 줄기직경 등 생육이 좋았다. 2. 목탄 시용에 따른 순량 구성요소는 10a당 300㎏ 시용에서 가장 좋았으며 수량도 300, 500㎏ 시용에서 각각 7%, 2% 증수되었고 1,000㎏ 이상 시용에서는 감수되는 경향 이었다. 3. 목탄 시용으로 토양 pH가 중성 가까이 변화되고 토양 유기물 함량과 양이온 치환용량 이 증가하여 토양 화학성이 개선되었다. 4. 목탄 시용으로 토양의 용적밀도와 고상율이 감소하고 토양 공극율이 증가하여 토양 물 리성이 개선되었다. This experiment was conducted to find out an application amount of wood charcoal pow-der and soil improvement effect of wood charcoal in 2000 year. The wood charcoal was made of a black oak. An application amount of used wood charcoal was 0, 3, 5, 10, 15, 20 Mg/㏊. Effect of soil improvement and application amount of wood charcoal was summerized as follows; Onion growth of plot applied wood charcoal was better than that of plot not applied wood charcoal. The plant height, the number of leaf and diameter of stem of plot applied wood charcoal 3 Mg/㏊ were better than any other that of plot. Yield components of plot applied wood charcoal 3Mg/Bμ were the best. Yied of plot applied wood charcoal 3 and 5 Mg/ha was increased 7% and 2% than that of control. But that of plot applied wood charcoal 10 Mg/㏊ over was trend to decrease.

Modeling stress anisotropy, strength differential, and anisotropic hardening by coupling quadratic and stress-invariant-based yield functions under non-associate flow rule

Yong Hou,Myoung-Gyu Lee(이명규),Junying Min,Jianping Lin 한국소성가공학회 2022 한국소성가공학회 학술대회 논문집 Vol.2022 No.5

Plastic anisotropy of sheet metals under plane strain loading: A novel non-associated constitutive model based on fourth-order polynomial functions

Yong Hou,Ali Abd El-Aty,Myoung-Gyu Lee,Junying Min 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

Orientation-Dependent Hydration Structures at Yttria-Stabilized Cubic Zirconia Surfaces

Hou, Binyang,Kim, Seunghyun,Kim, Taeho,Park, Changyong,Bahn, Chi Bum,Kim, Jongjin,Hong, Seungbum,Lee, Su Yong,Kim, Ji Hyun American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.51

<P>Water interaction with surfaces is very important and plays key roles in many natural and technological processes. Because the experimental challenges that arise when studying the interaction water with specific crystalline surfaces, most studies on metal oxides have focused on powder samples, which averaged the interaction over different crystalline surfaces. As a result, studies on the crystal orientation-dependent interaction of water with metal oxides are rarely available in the literature. In this work, water adsorption at 8 mol % yttria-stabilized cubic single crystal zirconia (100) and (111) surfaces was studied in terms of interfacial hydration structures using high resolution X-ray reflectivity measurements. The interfacial electron density profiles derived from the structure factor analysis of the measured data show the existence of multiple layers of adsorbed water with additional peculiar metal adsorption near the oxide surfaces.Surface relaxation, depletion, and interaction between the adsorbed layers and bulk water are found to vary greatly between the two surfaces and are also different when compared to the previously studied (110) surface [Hou et al., Sci. Rep. 2016, 6, 27916]. The fractional ratio between chemisorbed and physisorbed water species were also quantitatively estimated, which turned out to vary dramatically from surface to surface. The result gives us a unique opportunity to reconsider the simplified 2:1 relation between chemisorption and physisorption, originally proposed by Morimoto et al. based on the adsorption isotherms of water on powder metal oxide samples.</P>

Plastic anisotropy of sheet metals under plane strain loading: A novel non-associated constitutive model based on fourth-order polynomial functions

Yong Hou,Ali Abd El-Aty,Myoung-Gyu Lee,Junying Min 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

수질 자료에 대한 ARIMA 모형 적용

허용구 ( Hou Yong Ku ),박승우 ( Park Seung Woo ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-

A multiplicative ARIMA model was tested and applied to analyze the periodicity and trends of 168 monthly oxygen demand data from the Noryanggin water quality gauging station in the downstream Han River. ARIMA model was identified to fit to the data using ACF and PACF tests, and the parameters estimated using an unconditional least square method. The residuals between the observed and forecasted data were acceptable with the Porte-Manteau test. A forecast of DO changes was made for its applications.