• Title/Summary/Keyword: 논의수준

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Business Model of Data Service in Broadcasting and Communication Convergence (유비쿼터스시대 방송과 통신의 컨버전스 데이터 서비스 비즈니스 모델)

  • Jung, Chang-Duk;Lee, Ji-Eun
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2006.11a
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    • pp.245-249
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    • 2006
  • 디지털 컨버전스와 유비쿼터스 시대의 시작은 디지털 미디어 기술의 발전과 방송 통신 사업의 컨버전스를 가속화 시켰으며, 그 결과로DMB, WCDHA, Wibro, IP-TV, HSDPA 등의 새로운 형태의 차세대 제품과 서비스들이 뉴미디어 매체의 핵심으로 등장하고 있다. 국내에서 방송 통신의 컨버전스의 빠른 진행은 세계 최초로 디지털 멀티미디어 방송(DMB) 서비스 시작을 가능하게 하였다. DMB 서비스는 멀티미디어 서비스가 핵심이다. DMB 데이터 서비스인 Broadcasting Website Service(BWS)는 현재 지상파 DMB방송 사업자인 KBS, MBC, SBS, YTNDMB가 본방송 준비 막바지 단계이며, 삼성 전자와 LG전자를 비롯한 단말기 개발사들도 데이터 서비스를 위한 제품 출시에 서두르고 있는 등 DMB 산업의 활성화의 주역이 될 것으로 예상된다. DMB의 데이터 서비스는 뉴스, 날씨, 프로그램 정보 등의 단순 정보보기 수준에 그치지 않고, 리턴 채널을 이용한 양방향 서비스와, SMS, 전화걸기 등 휴대전화 단말의 고유기능과의 연계를 통한 다양한 서비스도 선보일 것이다. 더 나아가 향후 T-Commerce와 개인 광고 등 새로운 비즈니스 모델과 사업영역으로 확산시켜 나갈 수 있을 것이다. 그러나, 아직까지 DMB와 데이터 서비스는 초기단계로서, 표준 기술의 규격 작업, 이론적 논의들, 관련 사업자들의 비즈니스 준비 등에서 검토되어, 실제 사용자들을 대상으로한 연구 분석이 이루어 지지 않았다는 연구의 한계를 가지고 있다. 본격적으로 방송, 통신 컨버전스 데이터 서비스가 시작되면서, 사용자들에 초점을 맞춘 많은 연구가 이루어지길 바라며, 이러한 연구의 분석를 통해 또 다른 새로운 서비스와 비즈니스 기회의 창출을 기대해 본다.여 RD(Rate Distortion) 최적화 기반 모드 결정을 빨리 완료함으로써 고속 프레임간 모드 결정을 가능하게 한다. 제안된 방법은 프레임 간 모드 결정을 고속화함으로써 스케일러블 비디오 부호화기의 연산량과 복잡도를 최대 57%감소시킨다. 그러나 연산량 감소에 따른 비트율의 증가나 화질의 열화는 최대 1.74% 비트율 증가 및 0.08dB PSNR 감소로 무시할 정도로 작다., 반드시 이에 대한 검증이 필요함을 알 수 있었다. 현지관측에 비해 막대한 비용과 시간을 절약할 수 있는 위성영상해석방법을 이용한 방법은 해양수질파악이 가능할 것으로 판단되며, GIS를 이용하여 다양하고 복잡한 자료를 데이터베이스화함으로써 가시화하고, 이를 기초로 공간분석을 실시함으로써 환경요소별 공간분포에 대한 파악을 통해 수치모형실험을 이용한 각종 환경영향의 평가 및 예측을 위한 기초자료로 이용이 가능할 것으로 사료된다.염총량관리 기본계획 시 구축된 모형 매개변수를 바탕으로 분석을 수행하였다. 일차오차분석을 이용하여 수리매개변수와 수질매개변수의 수질항목별 상대적 기여도를 파악해 본 결과, 수리매개변수는 DO, BOD, 유기질소, 유기인 모든 항목에 일정 정도의 상대적 기여도를 가지고 있는 것을 알 수 있었다. 이로부터 수질 모형의 적용 시 수리 매개변수 또한 수질 매개변수의 추정 시와 같이 보다 세심한 주의를 기울여 추정할 필요가 있을 것으로 판단된다.변화와 기흉 발생과의 인과관계를 확인하고 좀 더 구체화하기 위한 연구가 필요할 것이다.게 이루어질 수 있을 것으로 기대된다.는 초과수익률이 상승하지만, 이후로는 감소하므로, 반전거래전략을 활용하는 경우 주식투자기간은 24개월이하의 중단기가 적합함을 발견하였다. 이상의 행태적 측면과 투자성과측면의 실증결과를 통하여 한국주식시장에

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Evaluation of Industry-specific Sectoral Approach in the Climate Change Framework (기후변화협상 체제에서 산업부문에 대한 부문별 접근방식(Sectoral Approach)의 평가 및 대응방향)

  • Han, Jin-Hyun;Yoo, Dong-Heon
    • Journal of Energy Engineering
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    • v.18 no.4
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    • pp.246-257
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    • 2009
  • Regarding climate change, the most significant challenge the world faces is achieving the goal of stabilizing the global concentration of greenhouse gases. However, this cannot be accomplished by greenhouse gas reduction efforts of developed countries alone. In this context, a "sectoral approach" has been brought up as a way to overcome the limit of the Kyoto Protocol and induce the participation of developing countries. This paper focuses on the different types of sectoral approaches that have been suggested so far, and their criteria, scope and effectiveness. It therefore explores the potential each approach has as a policy alternative under the post-2012 scheme. On top of that, with the possibility of these sectoral approaches becoming strong future policy alternatives in mind, this paper also analyzes their applicability to the Korean industry. For the steel, petrochemical and oil industries - in which energy efficiency exceeds the world average- a technology-based approach is proposed as an alternative. For the cement, paper and power generation industries - in which energy efficiency is about the same as the global average - a sectoral crediting mechanism or an index-based approach or a sector-wide transnational approach are proposed as alternatives. Lastly, this paper suggests a future research direction for their adoption and implementation.

Exploring the Patterns of Engineering College Students' Engineering-Related Creativity by Gender, Academic Year, and Engineering Education Accreditation Program through Latent Class Analysis (잠재집단분석방법을 통한 공과대학 학생들의 성별, 학년별, 공학인증제 프로그램 선택에 따른 공학 창의성 유형 탐색)

  • Lee, Jun-Ki;Shin, Sein;Rachmatullah, Arif;Ha, Minsu
    • Journal of Science Education
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    • v.41 no.1
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    • pp.16-35
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    • 2017
  • This study attempted to investigate the relationship among engineering students' creativity, engineering education accreditation, gender, and academic year. To be specific, fist, we examined the validity and reliability of the instrument for measuring engineering students' creativity by conducting Rasch analysis. Second, we compared level of creativity in terms of gender, academic year, and engineering education accreditation by using three-way ANOVA. Third, correlations among four constructs of creativity were examined. Fourth, latent classes with respect to creativity within the participants were identified using polytomous latent class analysis (poLCA). Data were collected from 2098 engineering students by using instrument for measuring four different constructs (creative cognition, creative tendency, collaboration, environment). By using Rasch analysis, validity and reliability of instrument for measuring creativity were confirmed. And the results of three-way ANOVA showed that there were significant difference in creativity in terms of gender. Female students showed the low level of creativity compared with male students. Also there were significant difference in creativity except creative cognition factor in terms of academic year. But there were no significant difference in creativity between students who participated engineering education accreditation program and the others. All constructs of creativity were significantly correlated with each others. Lastly, poLCA results showed that there were three distinct subgroups within engineering students in terms of the level of creativity. In the subgroup with low creativity, there were more female and first year students. Based on these findings, we discussed education for engineering students' creativity.

A Study on Rational Improvement of the Gift Regulation in the Telecommunications Market (통신시장의 경품규제에 대한 합리적 개선방안 연구)

  • Kim, Yong-Beom;Kwak, Jeong Ho
    • Journal of Internet Computing and Services
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    • v.18 no.6
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    • pp.137-144
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    • 2017
  • A variety of customized marketing strategies are being implemented in the telecommunications market, including the offering of gifts to consumers, as competition in the market is being restructured with the focus on bundled products. However, the Korea Communications Commission (KCC) has recently imposed fines for user discrimination on telecommunication carriers whose marketing strategies have included the award of excessive prizes. In that regard, various issues related to the suitability and appropriate limit of the current gift regulation in the telecommunications market have been raised. Since the Fair Trade Commission, which had a similar scheme to that of the KCC, abolished the regulation on gifts in July 2016, disputes have arisen as to whether the current regulation on gifts is practically effective from the perspective of consumer benefit. In other words, discussions on the rationality of the theoretical and empirical grounds for the regulation on gifts only in the telecommunication market but not in other commodities markets have begun. As such, this study aims to empirically analyze the suitability of the current regulation on gifts in the domestic telecommunications market under the new competitive environment centered on bundled products, and to seek the rational improvement of, and infer the implications for, the regulation on gifts in the telecommunications market based on the results of the analysis.

Middle School Students' Interest and Practice of Housing Education Contents Based on Jeonbuk Province (중학생의 주생활 교육내용에 대한 관심도와 활용도 조사 연구 -전북지역을 중심으로-)

  • Jin Sang Youn;Kwark Kyoung Sook
    • Journal of Korean Home Economics Education Association
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    • v.16 no.4 s.34
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    • pp.81-94
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    • 2004
  • The purpose of this study was to research middle school students' interest and practice about the housing education contents in Technology and Home Economics Subject(classify them into three units, application of living space, indoor environment and equipments. support and repair of housing) in their real life. This was the investigation of which 529 middle school students have lived in Jeonbuk province, SPSS program was utilized to analyze percentage. mean and standard deviation. as well as t-test, One-Way ANOVA and Pearson's correlation coefficients. The results of this research were as follows: Middle school students' interest and practice of the housing education contents appeared to the middle level. Middle school students was consider that the order of interest parts of housing contents were indoor environment and equipments. application of living space, support and repair of housing. And the order of practice parts of housing contents were application of living space. indoor environment and equipments. support and repair of housing. There were significant differences in interest and practice of contents according to demographic variables such as sex, educational level of parents, social status of home. school record. Interest about the housing education contents had significant positive relationships with practices of contents of housing education. Therefore. it would be necessary to develop teaching materials and housing education contents promoting interest of students.

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The Types and Coping Methods of dilemmas of Pre-service Science Teachers During Student Teaching (교육실습에서 예비과학교사들이 경험하는 딜레마의 유형과 대처 방법)

  • Kim, Heekyong;Lee, Bongwoo
    • Journal of The Korean Association For Science Education
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    • v.36 no.4
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    • pp.657-668
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    • 2016
  • The purpose of the study is to explore the types and coping methods of dilemmas that pre-service science teachers experience during student teaching. For this, we collected 131 dilemma journals that 34 pre-service science teachers wrote during a four-week period of student teaching. Results show that first, there are five categories of dilemmas, they are, 'Which science teacher should I be?', 'What is good science teaching?', 'How should I build relationships with the people around me at school?', and 'Who am I as a student teacher?'. Second, pre-service science teachers' status as a students-teachers made them cope with dilemmas passively. Third, when they cope with the dilemmas, student-teachers considered the dilemmas as conflicts of irreconcilable alternatives rather than opportunities of conciliation and compromise, therefore, most pre-service science teachers choose just one alternative and only 20% of dilemmas are resolved by compromise choice. Finally, dilemmas which showed the features of science teaching are the dilemmas related to scientific inquiry teaching and science teaching-learning model. Based on the results, we discussed the implications for teacher education.

Analysis of Pre-service Secondary Science Teachers' Uses of Curriculum Materials in Curriculum Design (중등 예비과학교사의 교육과정 설계에서 교육과정 자료의 활용 방식 분석)

  • Yang, Chanho;Bae, Yujin;Noh, Taehee
    • Journal of The Korean Association For Science Education
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    • v.33 no.7
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    • pp.1312-1328
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    • 2013
  • In this study, we investigated preservice secondary science teachers' uses of curriculum materials in curriculum design through a case study. Two preservice science teachers at a college of education in Seoul participated in this study. We interviewed them about their beliefs on teaching and learning prior to their teaching students. We then observed their teaching and collected all of the teaching/learning materials. Semi-structured interviews were also conducted before and after the instructions. Their uses of curriculum materials were systematically analyzed in the aspects of reading, evaluating and adapting curriculum materials. The analyses of the results revealed that their uses of curriculum materials had a significant difference in curriculum design. There was a difference in the way of reading curriculum materials that derived from different perspectives of curriculum reconstruction. The perspectives of curriculum reconstruction also affected the way of adapting curriculum materials. While the 'adding' was an important adaptation in curriculum design with active perspectives, the 'changing' was an important one with passive perspectives. In addition, the degrees of evaluating curriculum materials from the learners' views depended on their beliefs on teaching and learning. It was also connected to qualitative differences of adaptation in 'increasing student control over an activity' and 'increasing teacher control over an activity'. Educational implications of these findings are discussed.

Effect of Regular Exercise on Depression among Korean Older Adults (노인의 규칙적 운동이 우울에 미치는 효과 분석과 이론 검증)

  • Nam, Ilsung;Yoon, Hyunsook;Hyun, Dhawoon;Choi, Ahyoung;Yeom, Sorim
    • Korean Journal of Social Welfare
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    • v.66 no.4
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    • pp.5-23
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    • 2014
  • This study performed a series of analyses to examine the effects of regular exercise on depression using data from the HAS (Hallym Aging Study) and the KLoSA(Korean Longitudinal Study of Ageing). The effect of regular exercise on depression was tested through propensity score matching methods. In addition, analyses of five indirect effect models were performed to verify a theoretical description about how regular exercise has an effect on depression. The results of analysis were as follows. First, it was found in the two samples that elderly people who exercise regularly have a lower level of depression compared to those who do not. Second, the results of analysis of five indirect effect models were all significant. The psycho-physiological models showed the effect of regular exercise on depression using ADL(Activities of Daily Living) and grip strength. The psycho-social models also demonstrated the effect of regular exercise on depression using variables related to social activities. Based on these findings, intervention strategies to prevent depression was discussed.

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Stereotypes and Inequality: A 'Signaling' Theory of Identity Choice (고정관념과 불평등: 정체성 선택에 관한 신호이론)

  • Kim, Young Chul;Loury, Glenn C.
    • KDI Journal of Economic Policy
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    • v.34 no.2
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    • pp.1-15
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    • 2012
  • We develop an identity choice model within the context of a stereotyping-cum-signaling framework. The model allows us to explore implications of the fact that, when individuals can choose identity, then the distribution of abilities within distinct identity groups becomes endogenous. This is significant because, when identity is exogenous and if the ability distributions within groups are the same, then inequality of group reputations in equilibrium can only arise if there is a positive feedback between group reputation and individual human capital investment activities (Arrow, 1973; Coate and Loury, 1993). Here we show that when group membership is endogenous then the logic of individuals' identity choices leads there to be a positive selection of higher ability individuals into the group with a better reputation. This happens because those for whom human-capital-investment is less costly are also those who stand to gain more from joining the favored group. As a result, ability distributions within distinct groups can endogenously diverge, reinforcing incentive-feedbacks. We develop the theoretical framework that can examine the positive selection and the endogenous group formation. The model implies that inequality deriving from stereotyping of endogenously constructed social groups is at least as great as the inequality that can emerge between exogenously given groups.

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Pattern of Ovulation in Korean Women with Premature Ovarian Failure (한국인 조기난소부전 여성의 배란양상)

  • Kim, Hye-Min;Kim, Jae-Ryoung;Choi, Eun-Joo;Park, Eun-Joo;Hong, Seo-Yu;Lee, Jin-Yong;Park, Won-Il
    • Clinical and Experimental Reproductive Medicine
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    • v.35 no.3
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    • pp.231-238
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    • 2008
  • Objective: Significant portion of premature ovarian failure patients ovulate intermittently and even can achieve pregnancy. The clinical features and reproductive potentials of Korean women with premature ovarian failure have never been elucidated. The purpose of this study is to assess ovarian follicular growth and ovulatory potential. Methods: Complete medical records of fifteen women with idiopathic premature ovarian failure were reviewed retrospectively. Subjects with more than 6 ultrasonographic scans and 36 months of follow-up period were included. Once the ovarian follicle was found by ultrasonography, the follicular growth was serially monitored. The result of ovulation induction of 6 cycles in 4 patients were also evaluated. Rate of positive ovarian follicle by ultrasound, rate of natural follicular growth and response of ovulation induction were assessed. Results: Among the 15 patients, 6 women (40%) had ovarian follicle in random ultrasonography. But the chance of positive follicle per ultrasonography scan was 7% (8 out of 115 scans). One out of 6 women eventually ovulated during the follow-up scan. In remaining 5 subjects, size of follicles remained unchanged. None of 6 ovulation induction cycles resulted successful ovulation. Conclusion: Incidence of positive ovarian follicle in Korean premature ovarian failure patients is lower than that of Western counterpart. This result, however, could not be directly compared because of the differences of study design. The ovulation rate by medical ovulation induction in this group is 0%, which is worse than the reported success rate of Western studies.