• 한국산학기술학회논문지
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• 제11권9호
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• pp.3510-3516
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• 2010

본 논문은 유아에게 동물의 모습과 습성, 울음소리, 특징 및 한글과 영어 등을 학습하게 하기 위하여 다양한 동물이 있는 동물원을 대상으로 시스템을 개발하였다. 유아가 관심 있는 동물의 전면에 인형을 위치하면, 동물의 울음소리, 모습 등을 동물원 모형에 연결되어 있는 디스플레이 장치를 통하여 학습할 수 있다. 동물원은 현재의 동물원의 모양을 축소하여 각 동물 우리에 동물을 인식할 수 있는 센서를 부착한다. 부착된 센서는 각각 고유의 ID를 가지고 있으며, 유아인형이 접근 하게 되면 인식하고 처리기에 고유 ID를 전송하게 된다. 전송된 ID는 데이터베이스에서 전송된 ID값과 일치하는 콘텐츠를 검색하게 되고, 검색된 콘텐츠는 Output 장치를 통하여 출력되게 된다. 또한 인형이 동물우리에 근접하였을 경우 멀티미디어 효과를 통하여 동물의 울음소리 및 기본적인 학습을 할 수 있도록 하였으며, 한글, 영어, 수셈 학습을 동시에 할 수 있도록 구성하였다.

• 대한지구과학교육학회지
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• 제15권1호
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• pp.62-75
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• 2022

이 연구에서는 2015 개정 과학과 교육과정 중 '태양'에 관한 내용 요소를 중심으로, 3D 프린터를 활용한 체험형 STEAM(Science, Technology, Engineering, Arts & Mathematics) 프로그램을 개발하고, 이에 대한 효과성을 알아보고자 무선 표집된 2개의 중학교 77명의 학생들에게 이를 적용하여 창의적 문제해결력, STEAM 태도 및 수업만족도를 분석하였다. 이 연구의 결과는 다음과 같다. 첫째, 3D프린터를 활용하여 태양촉각모델을 제작하고 시각장애 체험을 통해 학생들이 체험 위주의 적극적인 학습이 가능하도록 프로그램을 개발하였다. 둘째, STEAM 태도 검사의 사전·사후 점수 차에 의한 대응표본 t 검정에서는 '소통', '유용성·가치 인식' 구인을 제외한 '흥미', '배려', '자아 개념', '자아 효능감', '이공계 진로선택' 구인에서 유의미한 통계적 검정 결과(p< .05)를 얻었다. 셋째, 3D프린터 활용 시각장애 중심의 체험형 STEAM 프로그램 적용 후에 실시한 만족도 검사에서는 하위구인들의 평균값의 범위가 3.66 ~ 3.97로, 전반적으로 수업에 대한 긍정적인 반응을 나타내었다.

• 한국융합학회논문지
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• 제10권10호
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• pp.197-205
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• 2019

이 연구는 문제중심학습(PBL)이 문제해결능력에 미치는 효과에 대한 일반화된 결론을 도출하고, 이와 관련된 조절변인을 발견하는 데 목적이 있었다. 연구의 목적을 달성하기 위하여 국내에서 1998년부터 2017년까지 발행된 석사학위 논문과 국내 학술지 논문 41편을 분석하고, 41개의 개별 효과 크기를 산출하였다. PBL이 문제해결능력에 미치는 평균 효과 크기는 .753이었으며, 이것은 PBL이 문제해결능력에 유의미한 교수-학습 방법이라는 것을 의미한다. 한편 문제해결능력에 영향을 미치는 조절변인은 교과, 유형, 학교급이었다. PBL의 문제해결능력 효과는 수학(d=.922), 예술(d=.916), 실과(d=.827), E-PBL(d=.791), 중학교(d=.972)에서 더 높았다. 교사들은 학생들의 문제해결능력 신장을 위하여, PBL 학습 환경을 유의미하게 조성할 필요가 있었다. PBL이 4차 산업혁명 시대의 학습 환경 변화에 따른 학생들의 고차원적인 문제해결능력을 신장하는 교수-학습방법으로 활용되기를 기대된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권3호
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• pp.74-83
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• 2020

Since fine dust (PM₁₀) has a significant influence on soil and groundwater composition during dry and wet deposition processes, it is of a vital importance to understand the fate and transport of aerosol in geological environments. Fine dust is formed after the chemical reaction of several precursors, typically observed in short intervals within a few hours. In this study, deep learning approach was applied to predict the fate of fine dust in an urban area. Deep learning training was performed by combining convolutional neural network (CNN) and recurrent neural network (RNN) techniques. The PM₁₀ concentration after 1 hour was predicted based on three-hour data by setting SO₂, CO, O₃, NO₂, and PM₁₀ as training data. The obtained coefficient of determination value, R², was 0.8973 between predicted and measured values for the entire concentration range of PM₁₀, suggesting deep learning method can be developed into a reliable and viable tool for prediction of fine dust concentration.

• 디지털융복합연구
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• 제12권12호
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• pp.303-311
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• 2014

클라우드 사용자들에게 책임 있는 서비스를 제공하는 클라우드 서비스의 책임 추적성(accountability)은 서비스 정책 준수, 모니터링 및 감사(auditing), 로그 정보 기록(logging) 등과 같은 여러 가지 기술을 적용한다. 궁극적으로 데이터 처리, 서비스 제공 과정에서 발생되는 여러 가지 문제들에 대해 누가 책임이 있는지를 판단함으로써 신뢰되는 클라우드 서비스를 제공하는 것을 목적으로 한다. 먼저, 부가가치가 높은 콘텐츠 서비스 제공 시에 안전하고 신뢰되는 DRM 클라우드 서비스를 제공하기 위해 본 논문에서는 콘텐츠 및 DRM 클라우드 서비스 체인을 이루는 클라우드 에코 시스템을 제시한다. 또한 콘텐츠 소유자와 콘텐츠 사용자의 DRM 클라우드 서비스에 대한 요구사항을 분석하고, 책임 추적을 위해 기록해야 할 로그 정보 및 모니터링 툴 구조를 제안한다.

• 응용통계연구
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• 제21권5호
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• pp.813-823
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• 2008

비동질적 포아송과정(NHPP) 모형은 신뢰성 공학에서 소프트웨어 내에 남아있는 결함발견현상을 설명하는데 자주 사용된다. 이때 결함발견율은 연속적이며 단조함수를 가정하였으나 현실적으로 소프트웨어 시험환경, 전략 및 자원할당 등으로 인해 결함발견율이 변하는 경우가 있다. 본 논문은 결함발견율이 변화하는 변화점 문제를 고려한 소프트웨어 신뢰도 성장모형(SRGM)을 고려하여 모수를 추정하는데 목적이 있다. 이를 위해 자료를 모의 생성한 후 평균값 함수의 각 모수를 최우추정법과 최소제곱법을 이용하여 추정하며, 결함발견구간이 일정하게 증가하는 경우와 일정하게 증가하지 않는 경우를 각각 고려한다. 이때 각 모수의 적합도 비교 평가를 통하여 변화점을 고려한 SRGM에서의 최적 추정법을 수치적 방법으로 판단한다.

• 한국비블리아학회지
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• 제6권1호
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• pp.133-160
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• 1984

The main purpose of the present study is to survey the major abstracting bulletins of national nature in Korea, to define such problem areas as lacunae, duplicates and limitation in coverage in the abstracting services currently available in Korea, and to make some suggestions for action for improving the abstracting services in the light of general principles and the tradition and situations unique to Korea. The major conclusions reached at this study are summarised as follows: (A) A new abstracting bulletin of general nature covering the whole field needs to be created in each of the following fields where no established abstracting service is available for the outcome of research and development activities in Korea. (1) Language (2) Religion (3) Art (4) Language (5) Literature (6) History (B) A new specialised abstracting bulletin needs to be created in each of the following fields of science where abstracting services limited in coverage are partially available. (a) Statistics (b) Sociology (c) political science (d) Public administration (e) Law (f) Folk lore (g) Military science (2) Pure sciences (a) Mathematics (b) Chemistry (c) Astronomy (d) Geology (e) Mineralogy (f) Life sciences (g) Botany (h) Zoology (3) Applied sciences (a) Agriculture (b) Architectural engineering (c) Mechanical engineering (d) Electrical engineering (e) Chemical engineering (f) Manufacturing industry (g) Domestic science (C) Publication of the abstracting bulletins suggested in (A) and (B) above may be ideally carried on by a qualified learned society established in the respective field. and should be financially supported by the public fund under the provisions of Art. 27 of the Research Promotion Act of 1979. (D) The current practice of adding the author's abstract and keywords to each of the records of the "Doctoral Theses in Humanities and Social Sciences" part of the" Catalogue of Doctoral and Master's Theses Submitted to the Universities in Korea" published by the National Assembly Library should be applied to all the other parts, i. e. to the parts of the "Master's Theses in Humanities and Social Sciences" and of the "Doctoral and Master's Theses in Natural Sciences': which will not only increase the Catalogue's use value but also discourage appearance of various theses abstracts of individual academic institutions such as the" Abstracts of the Doctoral and Master's Theses Submitted to Korea Advanced Institute of Science and Technology" which will in turn reduce inefficiency involved in the abstracting services at national level. (E) A general abstracting bulletin covering most part of the outcome of research and development activities in Korea other than that covered by the existing abstracts needs to be created to be temporarily. used till the abstracting journals suggested in this study will be fully available. A realistic way of having such a bulletin may be to expand the present coverage of "The Abstracts of the Reports of the Government-sponsored Projects" currently published by Korean Research Foundation.

• 한국수학교육학회지시리즈A:수학교육
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• 제44권3호
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• pp.457-475
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• 2005

We have inquired on what the statistical classes of the secondary schools had been aiming to, say the epistermlogical objects. And we now appreciate that the main obstacle to the systematic articulation is the lack of anticipation on what the statistical concepts are. This study focuses on the ingredients of the statistical concepts. Those are to be the ground of the systematic articulation of statistic courses, especially of the one for the school kids. Thus we required that those ingredients must satisfy the followings. i) directly related to the contents of statistics ii) psychologically developing iii) mutually exclusive each other as much as possible iv) exhaustive enough to cover all statistical concepts We examined what and how statisticians had been doing and the various previous views on these. After all we suggest the following three concepts are the core of conceptual developments of statistic, say the concept of distributions, the summarizing ability and the concept of samples. By the concepts of distributions we mean the frequency views on each random categories and that is developing from the count through the probability along ages. Summarizing ability is another important resources to embed his probe with the data set. It is not only viewed as a number but also to be anticipated as one reflecting a random phenomena. Inductive generalization is one of the most hazardous thing. Statistical induction is a scientific way of challenging this and this starts from distinguishing the chance with the inevitable consequences. One's inductive logic grows up along with one's deductive arguments, nevertheless they are different. The concept of samples reflects' one's view on the sample data and the way of compounding one's logic with the data within one's hypothesis. With these three in mind we observed Korean Statistic Curriculum from K to 12. Distributional concepts are dealt with throughout but not sequenced well. The way of summarization has been introduced in the 1 st, 5th, 7th and the 10th grade as a numerical value only. One activity on the concept of sample is given at the 6th grade. And it jumps into the statistical reasoning at the selective courses of ' Mathematics I ' or of ' Probability and Statistics ' in the grades of 11-12. We want to suggest further studies on the developing stages of these three conceptual features so as to obtain a firm basis of successive statistical articulation.

• Animal Bioscience
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• 제34권3_spc호
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• pp.434-442
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• 2021

Objective: This study aims to evaluate the influence of dietary flavonoids on the growth performance, blood and intestinal profiles, and carcass characteristics of broilers by employing a meta-analysis method. Methods: A database was built from published studies which have reported on the addition of various levels of flavonoids from herbs into broiler diets and then monitored growth performance, blood constituents, carcass proportion and small intestinal morphology. A total of 42 articles were integrated into the database. Several forms of flavonoids in herbs were applied in the form of unextracted and crude extracts. The database compiled was statistically analyzed using mixed model methodology. Different studies were considered as random effects, and the doses of flavonoids were treated as fixed effects. The model statistics used were the p-values and the Akaike information criterion. The significance of an effect was stated when its p-value was <0.05. Results: Dietary flavonoids increased (quadratic pattern; p<0.05) the average daily gain of broilers in the finisher phase. There was a reduction (p<0.01) in the feed conversion ratio of the broilers both in the starter (linear pattern) and finisher phases (quadratic pattern). The mortality rate tended to decrease linearly (p<0.1) with the addition of flavonoids, while the carcass parameter was generally not influenced. A reduction (p<0.001) in cholesterol and malondialdehyde concentrations (both linearly) was observed, while super oxide dismutase activity increased linearly (p<0.001). Increasing the dose of flavonoids increased (p<0.01) the villus height (VH) and villus height and crypt depth (VH:CD) ratio (p<0.05) in the duodenum. Similarly, the VH:CD ratio was elevated (p<0.001) in the jejunum following flavonoid supplementation. Conclusion: Increasing levels of flavonoids in broilers diet leads to an improvement in growth performance, blood constituents, carcass composition and small intestinal morphology.

• Journal of Korea Trade
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• 제27권5호
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• pp.1-22
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• 2023

Purpose - Southeast Asia has been the focus of Korea's foreign investment. Korea has been helping developing countries in Southeast Asia achieve economic growth and win-win cooperation through capital exports. FDI is an important channel for technology diffusion. However, the impact of FDI on the bias of technological progress in the host country is dependent on the host country's own endowment structure and capital-labor factor substitution elasticity. Therefore, the central issue of this paper is to accurately evaluate the impact of Korea's FDI to the four Southeast Asian countries in various industries on their bias of technological progress. Design/methodology - The paper uses macroeconomic data for Korea and four East Asian countries to estimate capital-labor factor elasticities of substitution using nonlinear, seemingly uncorrelated regressions (NLSUR). Then, the biased technological change index (BTCI) is calculated for each country. Finally, panel data analysis is used to explore the impact of Korean FDI in various industries in the four Southeast Asian countries on their own directed technological progress, and a robustness test is conducted. Findings - There is a substitution relationship between capital and labor factors based on their elasticity in Korea, Singapore and the Philippines. There is a complementary relationship between capital and labor factors in Indonesia and Malaysia. According to the BTCI, there is a trend toward labor-biased technological progress in all countries. Korean investments in manufacturing, wholesale and retail trade in the host country trigger capital-biased technological change in the host country; investments in the finance, insurance and information and communication sectors trigger labor-biased technological change. In addition, this paper also confirms that directed technological progress can enable cross-country transmission. Originality/value - The innovation of this paper lies in three aspects. First, we estimate the BTCI for five countries and explore the trend and situation of directed technological progress in each country from each country's own perspective. Second, we explore the impact of Korean FDI in the host country on the bias to its technological progress at the industry level. Second, we explore the impact of Korean FDI in various industries in the four Southeast Asian countries on the four countries' own directed technological progress from a national perspective. Finally, we propose corresponding countermeasures for technological progress from the perspective of inverse factor endowment. These innovative points not only expand the understanding of technological progress and cross-country technology transfer in East Asia but also provide practical references for policy-makers and business operators.