• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1660-1664
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• 2007

두만강을 중심으로 한 동북아시아의 환경보호를 위한 우선순위에서 토양보호가 높은 순위로 분류된 적은 거의 없었다. 토양손실에 의한 부정적 효과가 사람들에게 잘 알려져 있지 않으며, 특히 농촌에서 토양 보전의 가치를 이해하거나 토양에서 직접적으로 혜택을 받고 있다고 인식하는 사람들은 극히 일부에 지나지 않는다. 실제 동북아시아에서 토양보호와 관련하여 일관되게 접근해야 할 필요성이 국가 정책에 반영되고 그 결과 토양유실보호법이나 환경보호법 내에서 우선순위의 국가정책으로 도입된 것은 불과 지난 10-20년 사이의 일이다. 따라서 이 지역에서의 토사 유실은 매우 심각하며 이로 인해 많은 분제점이 발생하고 있는 것은 당연하다. 수자원과 토지 자원을 잘 보전하고, 물과 토양의 침식을 제어하면서 생태계를 보호하는 것은 두만강 유역에 있는 연안 국가의 현대화를 위한 기초이자 장기 전략과제이다. 대상 지역에서, 토양의 침식형태는 주로 수리적 침식, 바람에 의한 침식, 결빙과 해동에 의한 침식, 산사태, 토석류, 밀도류 및 구릉의 함몰 등이 포함되며 이중 수리적 침식과 산사태에 의한 유실이 가장 일반적이다. 두만강 유역에서 자원의 이용 압력이 땅과 물의 퇴화를 유발한다는 증거가 많아지면서, 자연자원을 관리하는 방법에 더 많은 주의를 기울이고 있으나 퇴사량에 대한 근본적 이해 없이는 불가능해 보인다. 따라서 본 연구에서는 토지 이용관리와 토사를 보호하는 방법을 개발하기 위해 토양의 침식에 대한 현재 상태를 상세하게 확인하였으며, 토양의 중요한 기능이 심각한 퇴화 과정으로 인해 위협받고 있다는 인식에 토대를 두고 토양 보호 프로그램을 유도하기 위해 두만강의 유사량을 경험적 방법을 이용하여 추정하였다.포 분석방법으로는 BW관 방법을 이용하여 분석하였다. 현재까지 국내 외적으로 하천 유사량 산정과 관련된 많은 경험식들이 제시되고 있다. 하지만, 외국의 충적하천에 기초하여 개발되어진 유사량 공식들을 우리나라 하천에 무분별하게 적용하는 것은 위험스러우며, 유사량 산정 결과의 신뢰성을 높이기 위해서는 무엇보다 우리나라 하천의 지형, 수리, 수문학적 요소들이 유사 특성에 미치는 영향을 알아야 한다. 그러므로, 본 연구에서는 실측을 통한 유사량 값을 하천의 지형, 수리, 수문학적 요소들과 비교 분석하여우리나라 하천에 맞는 유사특성을 알아보고, 기타 총유사량산정 공식을 이용하여 실측한 유사량과 비교 분석하고자 한다.호강유역의 급격한 수질개선을 알 수 있다.世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와 동년대에 동일한 목적으로 찬술되었음을 알 수 있다. $\ulcorner$경상도실록지리지$\lrcorner$(慶尙道實錄地理志)에는 $\ulcorner$세종실록$\lrcorner$(世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와의 비교를 해보면 상 중 하품의 통합 9개소가 삭제되어 있고, $\ulcorner$동국여지승람$\lrcorner$(東國與地勝覽) 에서는 자기소와 도기소의 위치가 완전히 삭제되어 있다. 이러한 현상은 첫째, 15세기 중엽 경제적 태평과 함께 백자의 수요 생산이 증가하자 군신의 변별(辨別)과 사치를 이유로 강력하게 규제하여 백자의 확대와 발전에 걸림돌이

• Korean Journal of Environmental Agriculture
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• v.21 no.2
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• pp.83-89
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• 2002

The effect of low dose $\gamma$ radiation on photosynthesis and the reduction of photoinhibition in red pepper plant was investigated. The seedling height leaf width and leaf length of pepper were stimulated in plants grown from seeds irradiated with the low dose of 4 Gy. The $O_2$ evolution in the 4 Gy irradiation group was 1.5 times greater than in the control. To investigate the effect of low dose $\gamma$ radiation on response to high light stress, photoinhibition was induced in leaves of pepper by illumination of high light (900 $\mu mol/m^2/s$). Pmax was decreased with increasing illumination time by 20% in the control, while hardly decreased in the 4 Gy irradiation group. The photochemical yield of PSII, estimated as Fv/Fm, was decreased with increasing illumination time by 50% after 4 hours while Fo did not change. However, Fv/Fm in the 4 Gy irradiation group was decreased by 37% of inhibition, indicating that the photoinhibition was decreased by the low dose $\gamma$ radiation. Changes in the effective quantum yield of PSII, $\Phi_{PSII}$, and 1/Fo-1/Fm, a measure of the rate constant of excitation trapping by the PSII reaction center, showed similar pattern to Fv/Fm. And NPQ was decreased after photoinhibitory treatment showing no difference between the control and the 4 Gy irradiation group. These results showed the positive effect of low dose $\gamma$ radiation on the seedling growth and the reduction of photoinhibition.

• Journal of Science Education
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• v.34 no.2
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• pp.246-259
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• 2010

The purpose of this study was to investigate pre-service biology teachers' perception of the evolution. This study was to compare the views of pre-service biology teachers with no religion with those of christian preservice teachers. Subjects were 77 pre-service biology teachers who enrolled in an university and graduate school of education located in Seoul. The instrument of this study was a questionnaire which consisted of 14 items on 2 domains: the nature of science, the origins of human beings. The key results are as follows. Most pre-service teachers showed highly understanding of the characteristics of science. However pre-service biology teachers still possessed naive views on the distinction of law and theory. In terms of the methods of science, many of the pre-service biology teachers considered scientific theories to progress through the accumulation of observation and experiments or through changes and modifications in existing theories. Compared with the pre-service teachers with no religion, christian pre-service teachers had conflicting views and misconceptions about the origins of human beings. The factors of religion were found to be one of the important barriers which prevent them from understanding the origins of human beings. The results suggested that the education program for pre-service biology teachers integrating the concepts and development process of the scientific knowledges should be effective for understanding the nature of science. For pre-service biology teachers, It is important to understand conflicting views of the christian pre-service teachers who understand creationism as a science.

• Journal of Internet Computing and Services
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• v.2 no.2
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• pp.71-93
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• 2001

Commonly to design a database system. a conceptual database has to be designed and then it is transformed into a logical database schema prior to building a target database system. This paper proposes a method which transforms a Temporal Entity-Relationship Model(TERM) into a Temporal Object-Oriented Model(TOOM) to build an efficient database schema. I formalize the time concept in view of object versioning and specify the constraints required during transformation procedure. The proposed transformation method contributes to getting the logical temporal data from the conceptual temporal events Without any loss of semantics, Compared to other approaches of supporting various properties, this approach is more general and efficient because it is the semantically seamless transformation method by using the orthogonality of types of objects, semantics of relationships and constraints over roles.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.4
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• pp.646-662
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• 2016

This study of elderly couples examined the main environmental factors affecting the married life satisfaction and life satisfaction of the spouses. The survey was conducted on 60-year-old elderly couples who live in the metropolitan area of Seoul and Gyeonggi. A total of 400 questionnaires were used to analyze the exception of a number of 12 388 additional missing data. The results were as follows. First, environmental factors affecting the marital satisfaction of spouses' personality suitability and gender role attitudes appeared in the economic conditions. Second, the spouses environmental factors affecting the life satisfaction turned out to be the gender role attitude, reliability and economic conditions. Third, the major environmental factors affecting both spouses married life satisfaction and life satisfaction was found to be the gender role attitude and economic conditions. Fourth, the environmental factors representing a moderating effect on the supporting spouse between environmental factors and life satisfaction appeared to be the personality suitability and economic conditions. These results suggest that the recent increases in the twilight divorce rate may be due to the marriage satisfaction and common factors of gender role attitudes. Therefore, to improve the lives and economic conditions as well as the satisfaction of the spouse, the support of important factors are needed to adjust the crisis of old age couples. Therefore, a relevant policy that targets elderly couples through counseling and education will be needed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5260-5267
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• 2013

In order to create a successful regional development model, there should be an effort to foster a strategic industry which boosts a geographical features of rural areas. Because, It must be clear that the strategic industry chosen between choice and concentration of the development of the local industry development which boosts the local economy revitalization. The local government should have continual concern and roles to fulfil political subjects and keep estimating about the possibility that there could be the sustainable development by Task Ahead of the local industry. This study's indicators were established for the adequacy evaluation of the industrial policy by focusing on domestic regional development's success example. Next, Conjoint analysis was conducted on the Experts. On the basis of this analysis, the weights of indicators are derived. And this study suggest the reasonable evaluation system to take Sustainable industry plan of regional strategic. Consequently, 'Regional development' sector separate 3 categories which are 'Local economy', 'Human Resource Development', 'local marketing' and 9 indicators were derived. 'Industrial development' sector derived 9 indicators about 'Construction of infrastructure', 'Technical development' and 'business support'. Looking through the implications of this study. First, the problem needed to be supplemented based on the Diversity and concreteness of Evaluation system when government assesses regional industry development policy. Second, local government have to strategically consider the possibility of convergence between industries and easiness of network in a broad region. Finally, Foundation and support of the professional manpower and companies for the regional industries must be established.

• Journal of Christian Education in Korea
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• v.62
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• pp.187-225
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• 2020

The purpose of this study is to develop a assessment tool that can be used to measure core competencies by describing operational definitions of the six core competencies of KBU and constructing sub-factors accordingly. The followings are the results of this study. First, this study analyzed previous research on KBU 6 competencies and set operational definitions through Bible verses describing KBU core competencies. Second, the sub-elements according to the definition of core competency were selected through previous research and the drafting of assessment tools for each sub-element was developed. And then, confirmed the validity of the tool as a suitable tool for KBU, through a review of professors who are fluent in KBU's founding philosophy and policies. The assessment tools were revised based on feedback from the professors. Third, in order to validate the assessment tool, the researchers conducted a survey on students in the second semester of 2018. The data was collected, the reliability was checked based on the data, the validity was verified through EFA and CFA, and the final assessment tool was confirmed. In conclusion, this study is meaningful in developing the KBU core competency assessment tool, and it is expected that will be able to systematically manage the KBU competency of students.

• Reproductive and Developmental Biology
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• v.30 no.1
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• pp.13-19
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• 2006

To search of new porcine pheromonal odorants for biostimulation control system technologies to improve reproductive efficiency in livestock species, the comparative molecular field analysis (CoMFA) for binding affinity constant $(p(Od)_{50})$ between porcine odorant binding protein (pOBP) and ligands of odorant 2-(cyclohexyloxy) tetrahydrofurane derivatives as substrate molecule was conducted and discussed. In the optimized CoMFA model AIV with chirality $(C_1'(R),\;C_2(S))$ in substrate molecule and atom based fit alignment (A) of odorants, the statistical results showed the best predictability of the binding affinities $(p(Od)_{50})$ based on the LOO cross-validated value $r^2_{cv}.\;(q^2=0.886)$ and non-cross-validated conventional coefficient $(r^2_{ncv}.=0.984)$. the binding affinity constants exhibited a good correlation with steric (40.8%), electrostatic (14.6%) and hydrophobic (44.6%) factors of the substrate molecules. from the analytical results of the contour maps, which may give us some valuable informations to the modification of odorants for effective binding affinity.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.2
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• pp.353-370
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• 2016

This study examined elementary mathematics teacher's guidebook to determine the inclusion level of 11 critical features of evidence based instruction. And the inclusion level of the features in teacher's guidebook were interpreted as 'Low', 'Middle' and 'High'. The results are as followings. First, The overall inclusion level of the features in teacher's guidebook is 'Middle' The inclusion level of the features in teacher's guidebook for 1st, 2nd, 3rd and 4th were 'Middle' but for 5th and 6th were 'Low'. Second, the inclusion level of the features 'Clarity of Objective', 'Single Concepts and Skill Taught', 'Use of Manipulatives and Representation', 'Explicit Instruction', 'Provision of Examples for new concepts and skill', 'Adequate Independent Practice Opportunities' and 'Progress Monitoring' were 'Middle' The inclusion level of the features 'Review of Prerequisite Mathematical Skills', 'Error correction and Corrective Feedback' and 'Instruction of Strategies' were 'Low'. And discussed the results.

• Journal of Science Education
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• v.39 no.1
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• pp.15-27
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• 2015

This study investigated whether there was a difference of the change in perspective of the nature of science depending on subjects of the history of science, after designing for two kinds of topics of role play programs based on the history of science to be transformed into a modern perspective. Before the history of science-role plays, the degree of the modern perspective was statistically no difference between group I(the atomic model transition-role play) and group II(the Mendeleev's periodic table-role play). However after treatment of the history of science-role plays for the each group, the degree of group I was higher than the degree of group II in the modern perspective. The results of this study indicate that the degree of changes into modern perspective of the nature of science by performing a history of science-role play may be depend on the subject of the history of science combined with the role play, and suggest the possibility that may be more effective to change the nature of science into the modern perspective, in case of performing of role play based on the history of science that includes the scientific knowledge established by a number of scientists with time series.