• Journal of Bio-Environment Control
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• v.26 no.4
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• pp.402-410
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• 2017

The effect of the steel pipe member joint on the design performance of a plastic multi-span greenhouse was analysed through the comparing full-scale experiment and numerical analysis. The design performance of the greenhouse is generally evaluated through numerical analysis, but it is rare to consider the characteristics of the connections or joints of the members. In this study, the effect of the column-gutter beam-rafter-wind break wall joint on the design performance of the whole structure of a plastic multi-span greenhouse was analysed. The numerical results with assuming that the member joint are rigid condition were compared with the full-scale load test results using member joints used in the field. The stiffness of the entire structure was compared using the load-displacement relationship and the change of the load sharing ratio that the main members such as column, rafters, and wind break wall was analysed. The results of the load test were about 40% larger than the numerical result and the member stress was more than twice as large as those of the loaded columns. In order to increase the reliability of the design performance of the greenhouse, it is necessary to develop a numerical analysis model which can consider the characteristics of various joints.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.2 no.4
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• pp.43-68
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• 2007

The purpose of this paper is to clarify the actual conditions of entrepreneurial school which was drawn from the new industry-academy cooperation paradigm, and to suggest a role model for educational program for entrepreneurial school, in order to increase its self-generating ability. According to survey of 5 entrepreneurial schools, most of curriculums did not show a user-based. This indicates that series of processes, such as analyzing user's(learner, local community, institution) request and setting up the goal are not being conducted professionally and systematically. Through this study, I would like to deliver the importance of new industry-academy cooperation paradigm of entrepreneurial schools and incite them to apply major principles of new industry-academy cooperation paradigm to their entrepreneurial education program, in order to enable continuous survival and development. This study has conducted research on the actual conditions of entrepreneurial school to examine whether the role model of entrepreneurial education program coincides with the paradigm of new industry-academy cooperation paradigm. Thus, this study has conducted two verifications as whole. First, through theoretical examination, this study has drawn out the major principles of new industry-academy cooperation paradigm and considered effective applying method for it. Second, this study has analyzed overseas' cases for development of entrepreneurial education program and proved the propriety of major principles. Through theory and case studies, the study presented a role models for each subjects and provided necessity for applying major principles to entrepreneurial school's research on the actual operating condition.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.3B
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• pp.221-232
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• 2011

Applicability of three soil erosion models for burnt hillslopes was evaluated. The models were estimated with the data from plots established after tremendous wildfire occurred in the east coastal region. Soil erosion and surface runoff were simulated by the Water Erosion Prediction Project (WEPP) and the Revised Universal Soil Loss Equation (RUSLE) of application mode for disturbed forest areas and the Soil Erosion Model for Mountain Areas (SEMMA) developed for burnt hillslopes. Simulated sediment yield and surface runoff were compared with the measured those. In maximum value of sediment yield, three models was under-predicted and RUSLE and WEPP had difference of over two times. SEMMA showed the best model response coefficient, determination coefficient and the model efficiency. In application of models to the soil erosion according to the elapsed year after wildfire, all models were underestimated in initial stage disturbed by wildfire. Evaluation of models in this burnt hillslopes was shown the tends to under-predict soil erosion for larger measured values. Although a lot of sediment can be generated in small rainfall event as fine-grained soil of the high water repellency was exposed excessively right after wildfire, this under-prediction was shown that those models have a limit to estimate the weighted factors by wildfire.

• Journal of the Korean Society of Radiology
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• v.4 no.3
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• pp.19-25
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• 2010

Dysphagia is common and serious problems in post-stroke patients. The post-stroke dysphagia with aspiration is associated with dehydration, malnutrition, pneumonia, sepsis and death. Up to date, gag reflex and choking history used to decide the aspiration in clinical. The purpose of this study was to evaluate the aspiration and to choice the proper meal formation using by video fluoroscpic swallowing study(VFSS) with post-stroke dysphagia patients. 58 post-stroke patients and ten normal person participated to perform the VFSS with liquid type, puding, yoplait, rice mixed with barium(Ba). Two rehabilitation medicine doctors and a radiological technologist analysed the phase(oral, pharyngeal, esophageal phase)with video film, and checked the pharyngeal transition time(PTT). 38 patients showed abnormality in pharyngeal phase, 13 patients in oral and pharyngeal phase, 3 patients in oral phase, and 2 patients in pharyngeal and esophageal phase. 43 patients(65.2%) occured the aspiration, but 23 of 43 patients improved by the chin tuck position. Aspiration occured 34 patients in liquid type, 2patients in rice gruel and nothing in boiled rice. After VFSS, 13 of 23 patients change the intaking pathway from nasogastric tube(NGT) to oral, On the contrary with 3 of 42 patients from oral to NGT. Consequently VFSS is clearly effective to evaluate the aspiration with post-stroke dysphagia patients.

• Information Systems Review
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• v.9 no.1
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• pp.105-120
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• 2007

With the fast development of the Internet and the increasing dependence on information infrastructures, companies are faced with various information security threats such as information leakages, modifications, and information breaches. South Korea is one of the leading countries in the Internet usage, but is ranked relatively low when it comes to information security. In fact, many Korean firms have suffered financial losses and damaged corporate images from the information security breaches. However, because of the difficulties in quantifying the costs of the information security breaches, Korean companies tend to delay their investment decisions on information security. The purpose of this study is to measure the cost of information security breach and the economic value of security investment using the event study methodology. Our results show that the announcement of an information security breach negatively influenced the market value of the corresponding company. The effect was statistically significant at the significance level of p=0.05. The breached companies lose, on average, 0.86% of their market values on the day of the announcement - an average loss in market capitalization of $55 million. On the other hand, the investment on information security had no effect on the stock price or the market value of the firm.

• 한국해양학회지
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• v.29 no.3
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• pp.304-318
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• 1994

Macrobenthic fauna in three Keum-Mankyung-Dongjin Estuaries and their nieghbouring coastal region in the west coast of Korea were sampled as 39 stations with van Veen grab to describe the distribution patterns of macrobenthos. Total 61 taxa from 10 faunal taxonomic groups and 5,636 individuals were collected. Abundance, species number, and faunal composition varied among three estuaries and coastal region. Dominant species from estuaries were similar to each other, but different from those of coastal region. Dominant species in estuarine regions were Prionospio cirrifera, potamocorbula amurensis. Nephtys californiensis, Glycera chiron and Glycinde sp, those from coastal area were Mactra chinensis. Magelona japonica, Owenia fusiformis. Anaitides Korean and Nephtys polybranchia. Two most dominant species in estuaries, Potamocorbula amanuensis and Prionospio cirrifer were not found elsewhere in Korean waters. The patchy distribution of dominant species and low species richness were reflected in the low species diversity Filter feeders were a major component in estuaries. High proportion of carnivores and low percentage of subsurface deposit feeders seemed to be a typical trophic composition in the study area. the distribution pattern of macrobenthos was related with the salinity and sediment types.

• Journal of Gifted/Talented Education
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• v.11 no.3
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• pp.1-21
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• 2001

In general, curriculum is a product of the process of a political decision-making among a variety of peoples who have different perspectives on learners, knowledge, and society as a whole. And also, it is being affected by larger social and political contexts. As curriculum has become more a centerpiece of program activity for the gifted, the field has more emphasized the importance of viable curriculum models. The purpose of this article is to reflect current status of curriculum development for the gifted, explain the commonness and differences of several perspectives on gifted education programs, and lastly, share some experiences to deliberate about several critical issues of which any activity of program development for the gifted should consider. According to Eisner & Valiance (1974), there are five conceptions of curriculum which have shaped the thinking of many educators of what a view of curriculum for the gifted might be ; curriculum as the development of cognitive process, curriculum as technology, curriculum as personal relevance, curriculum as social construction, curriculum as academic rationalism. Although educators have a freedom to choose among these various curriculum orientations, the most effective curricular incorporate or balance all of them to some extent. After reviewing those perspectives on curriculum and several difficulties which are currently confronted at the site of curriculum development, this article have tried to identify the major curriculum efforts of the gifted education field. It focuses on the issues of developing programs for gifted and talented students, rather than on specific program models. As a result, it suggested seven critical issues or value conflicts which should be considered in the process of program development for the gifted: the balance of domain-general abilities of the gifted and domain-specific abilities, mutual consideration of accelerated learning and enrichment learning, separate organization of contents versus integrated organization, the balance of cognitive domain of human development and affective domain, official curriculum versus non-official education experience, individual-oriented learning situation versus group-oriented teaming, and expert-centered approach versus practitioner-centered approach to curriculum development.

• Journal of the Korean Magnetics Society
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• v.13 no.3
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• pp.97-102
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• 2003

Synthetic ferrimagnetic layer (SyFL) with structure NiFe/Ru/NiFe which can be applied high density TMR device in free layer were prepared by an inductively coupled plasma (ICP) helicon-sputter. We proposed a model of predicting coercivity (H$\_$c/), spin-flopping field (H$\_$sf/), and saturation field (H$\_$s/) as a function of Ru thicknesses, from the equilibrium state of energies of Zeeman, exchange, and uniaxial anisotropy. We fabricated the samples of Ta(50 ${\AA}$)/NiFe(50${\AA}$)nu(4∼20${\AA}$)NiFe(30 ${\AA}$)/Ta(50${\AA}$), and measured the M-H loops with a superconduction quantum interference device (SQUID) applying the external field up to ${\pm}$ 15 kOe. The result was well agreed with the proposed model, and reveal K$\_$u = 1000 erg/㎤, J$\_$ex/ =0.7 erg/$\textrm{cm}^2$. We report that H$\_$c/ below 10 Oe is available, and R$\_$u/ thickness range should be in 4-10 ${\AA}$ for MRAM application. Our result implies that permalloy layers may lead to considerable magnetostriction effect in SyFL and intermixing in NiFe/Ru interfaces.

• Korean Journal of Plant Resources
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• v.29 no.5
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• pp.539-546
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• 2016

The aim of this study was to analyze antioxidant activity, total phenolics, and vitamin C content in unripe and ripe jujube cultivar and to investigate correlation between antioxidant and chemical constituents including total phenolics and vitamin C. The antioxidant activity was measured by the DPPH radical scavenging activity, ABTS radical scavenging activity, and reducing power. Although, the weight, diameter and soluble solids of Zyziphus jujuba fruit were increased with the progress of ripening, antioxidant activity and total phenolics were decrease during ripening. The highest free-radical scavenging activity (at 2.5 ㎎/㎖) and reducing power (at 1 ㎎/㎖) in fruit were 81.75% (Bokjo, unripe) and 0.80 (Mudeung, unripe), respectively. The highest total phenolic content in unripe fruit of Mudeung was 62.50 ㎍/g. A linear correlation (r=0.911) was shown between DPPH radical scavenging activity and total phenolic content.

• Proceedings of the Korean Society for Environmental Edudation Conference
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• 2002.01b
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• pp.1-168
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• 2002

이 연구는 지난 20여 년 동안 우리나라 환경교육의 활성화를 위하여 많은 연구자, 학교 교사, 환경단체 지도자가 제안해 온 과업을 다루고있다. 그것은 학교 안팎에 걸쳐 요람에서 무덤까지 환경교육이 체계적이고 지속적으로 이루어질 수 있도록 법적, 제도적 기반을 마련하는 것이다. 법제적 뒷받침이 환경교육의 활성화를 위한 충분조건은 되지 못하더라도 필요조건으로서 매우 중요한 의미를 갖고 있다는 점은 분명하다. 이 연구를 수행한 사단법인 한국환경교육학회는 국회환경포럼과 함께 환경교육진흥법(가칭) 시안의 개발과, 나아가 실질적인 입법화를 위해 노력하였다. 이를 위하여 먼저 우리나라에 이미 존재하는 도서벽지 교육진흥법, 특수교육진흥법, 산업교육진흥법, 영재교육진흥법, 과학교육진흥법, 유아교육진흥법, 이상 여섯 개의 교육진흥법을 분석하여 환경교육진흥법 시안 개발을 위한 시사점을 얻고자 하였다. 다음으로 외국의 환경교육 관련법에 대한 사례 연구를 진행하였다. 특히 미국의 경우 1970년 처음 환경교육법이 제정된 이후 몇 차례의 개정과 재승인 과정을 거쳐왔다. 미국에서는 1990년에 제정된 국가환경교육법의 재승인에 관한 공청회가 지난 2000년 여름 동안 개최되어 환경교육법의 필요성, 효과, 고려할 조항 등 본 연구에 중요한 참고 자료를 얻을 수 있었다. 본 학회의 다른 연구진에 의해 2001년 10월에 완료된 제2차 환경교육 중 ·장기 강화방안 연구의 결과물도 환경교육 활성화를 위한 시안에 담아야 할 내용과 방향을 결정하는데 실질적인 도움을 주었으며, 이를 토대로 연구진과 국회환경포럼의 환경교육활성화위원회의 위원이 윤독과 수정을 거쳐 시안의 타당성과 완성도를 높이고자 하였다. 작성된 시안에 대해서는 먼저 국내의 환경 또는 환경교육 관련 전문가에게 설문지를 보내어 의견 수렴을 하였으며, 이 과정에서 시안에 포함된 대부분의 항목에 대해 높은 찬성률을 보인 것으로 나타났다. 그밖에 설문지로부터 수정 ·보완 요청 사항을 정리하여 최종 시안을 작성하는데 반영하였다. 끝으로 10월 26일 국회 의원회관에서 개최된 공청회를 통하여 다양한 집단의 의견을 수렴하였으며, 공청회 동안 제시된 의견들을 반영하여 최종 시안을 작성하였다. 이러한 과정을 거쳐 작성된 환경교육진흥법 최종 시안은, 제1조 목적에서 제11조 환경교육연구의 진흥에 이르기까지 총11조로 구성되었으며, 환경교육사 자격증제 및 환경교육 프로그램 인증제 등 획기적인 전기를 마련할 수 있는 방안들이 다수 포함되어 있다. 특히 환경교육진흥법의 주무 부처를 환경부로 제안한 것은 기존의 교육 관련 진흥법들이 교육인적자원부를 주무로 하고 있는 것에 비해 매우 특기할 만 하다. 그 이유는 본문에서 밝힌 바와 같이 환경교육이 갖고 있는 특수성 때문이다. 환경교육진흥법의 주무 부처를 환경부와 교육인적자원부 중 어디로 하는 것이 바람직한가에 대해서는 연구진 내부는 물론 공청회에 참가한 사람들 사이에도 이견이 있었음을 밝혀 둔다. 끝으로, 이 연구에서 마련된 시안과 연구 결과가 최종적으로 속히 법제화가 되고, 우리나라 환경교육 진흥에 기여하게 되기를 바란다.