• Journal of Korea Game Society
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• v.12 no.6
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• pp.83-94
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• 2012

Employing in-depth interview, this study sought to explore the meaning of game play among those adolescent game addicts. Recent evolution of game text and rapid diffusion of smart media contributed to their addictive game use. Stronger relationship-building with their peer group through game play was also more important for them. In addition, alienation from family, school and society apparently led those adolescents to evaluate the virtual experience to be more valuable and meaningful. Lack of proper parental mediation and intervention from the school authority caused them to spend more time in the virtual world. Without understanding the complex social context surrounding the adolescents, a systematic approach to attenuate the problem of game addiction is hardly attainable.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.306-306
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• 2011

대상유역의 합리적인 홍수량 산정을 위해서는 풍부한 홍수자료를 바탕으로 직접적인 빈도해석을 적용하는 것이 가장 적정한 방법으로 알려져 있다. 하지만 국내의 대부분 유역은 관측된 홍수 자료가 제한적이고, 미계측 유역이므로 빈도해석을 통한 홍수량의 산정은 현실적으로 불가능한 실정이다. 이에 국내에서는 홍수량 산정에 대한 대안으로 강우-유출관계의 선형성을 가정한 집중형 강우-유출모형을 적용하고 있다. 하지만 집중형 강우-유출모형은 경험적인 공식에 의해 결정되는 수문매개변수의 비합리성 및 유역분할, 유역 하도추적의 구축방식에 따라 상이한 홍수량이 산정되는 문제점이 지적되고 있다. 따라서 최근에는 경험적이고 개념적인 집중형 유출모형을 지양하고, 격자체계를 기반으로 하고 있는 분포형 강우-유출모형의 연구가 활발히 진행되고 있는 상황이다. 본 연구의 목적은 남강 유역에서의 분포형 강우-유출모형 적용성 검증에 있다. 따라서 남강 유역 내에 발생한 4개의 호우사상을 선정한 후 강우 레이더 영상인 CAPPI영상 및 C-Max영상을 이용하여 면적강우량을 산정하였다. C-Max 영상을 이용하여 산정된 면적강우량은 지점강우를 이용한 면적강우량과 비교해 130%이상 과대 산정되는 경향을 나타낸 반면, CAPPI 영상을 이용하여 산정된 면적강우량은 10%이하의 오차를 나타내었다. 따라서 본 연구에서는 CAPPI 영상을 분포형 유출 모형인 VfloTM에 입력하여 유출을 모의 하였다. 모의된 유출곡선과 관측된 유출곡선을 비교 검토한 결과 80%이상의 높은 상관성을 나타낸 반면 첨두유출량 오차는 30%이상의 오차를 나타내었다. 하지만 강우보정기법인 G/R보정 기법을 적용한 후에는 첨두유출량 오차가 10%미만으로 감소하는 것으로 나타났다. 따라서 남강 유역에 분포형 유출모형을 적용하기 위해서는 다양한 강우 사상에 대한 지속적인 연구가 수행되어야 할 것으로 판단된다.

• Journal of the Korean Society for information Management
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• v.25 no.3
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• pp.297-320
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• 2008

Although the native local data is being deemed important in the age where historical records are regarded as important, currently it is hard to find out detailed actual state of local data, because it is now being collected and managed by many institutions and individuals. This study is aimed at surveying the current state of management of native local data possessed by local cultural center, one of institutions that produce and manage local data, and suggesting a desired alternative idea of cultural center for management of native local data, through the problems found by the research. As the result, the current state of data management of the local cultural center are as follows: First, local data management in the local cultural center as the problem in poor surroundings and a financial question get local data-related education make systematic data collection and management unavailable. Second, local data depends on the extent of its awareness of it. each and every cultural center shows a significant deviation in the extent of execution of local data-related project. Third, even though the publication business of the cultural center is being lively executed, it attaches importance to the history of local authority rather than to the residents' life, and it should not be supplemented in applying it to education and production of cultural contents.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.104-104
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• 2010

현재 디스플레이 시장은 급변하게 변화하고 있다. 특히, 비정질 실리콘의 경우 디스플레이의 채널층으로 주로 상용화되어 왔다. 비정질 실리콘 기반의 박막 트랜지스터는 제작의 경제성 및 균일성을 가지고 있어서 널리 상용화되고 있다. 하지만 비정질 실리콘의 경우 낮은 전자 이동도(< $1\;cm^2/Vs$)로 인하여 디스플레이의 대면적화에 부적합하며, 광학적으로 불투명한 특성을 갖기 때문에 차세대 디스플레이의 응용에 불리한 점이 있다. 이런 문제점의 대안으로 현재 국내외 여러 연구 그룹에서 산화물 기반의 반도체를 박막 트랜지스터의 채널층으로 사용하려는 연구가 진행중이다. 산화물 기반의 반도체는 밴드갭이 넓어서 광학적으로 투명하고, 상온에서 증착이 가능하며, 비정질 실리콘에 비해 월등히 우수한 이동도를 가짐으로 디스플레이의 대면적화에 유리하다. 특히 Zinc Oxide, Tin Oxide, Titanum Oxide등의 산화물이 연구되고 있으며, indium이나 aluminum등을 첨가하여 전기적인 특성을 향상시키려는 노력을 보이고 있다. Tin oxide의 경우 천연적으로 풍부한 자원이며, 낮은 가격이 큰 이점으로 작용을 한다. 또한, $SnO_2$의 경우 ITO나 ZnO 열적으로 화학적 과정에서 더 안정하다고 알려져 있다. 본 연구에서는 $SnO_2$ 기반의 박막 트랜지스터를 DC magnetron sputtering를 이용하여 상온에서 제작을 하였다. 일반적으로, $SnO_2$의 경우 증착 과정에서 산소 분압 조절과 oxygen vacancy 조절를 통하여 박막의 전도성을 조절할 수 있다. 이렇게 제작된 $SnO_2$의 박막을 High-resolution X-ray diffractometer, photoluminescence spectra, Hall effect measurement를 이용하여 전기적 및 광학적 특성을 알 수 있다. 그리고 후열처리 통하여 박막의 전기적 특성 변화를 확인하였다. gate insulator의 처리를 통하여 thin film의 interface의 trap density를 감소시킴으로써 소자의 성능 향상을 시도하였다. 그리고 semiconductor analyzer로 소자의 출력 특성 및 전이 특성을 평가하였다. 그리고 Temperature, Bias Temperature stability, 경시변화 등의 다양한 조건에서의 안정성을 평가하여 안정성이 확보된다면 비정질 실리콘을 대체할 유력한 후보 중의 하나가 될 것이라고 기대된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.2
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• pp.422-430
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• 2008

Data integration is techniques to combine heterogeneous data from different sources, and to allow users to transparently access all data from multiple sources via a single view. The difficulty with data integration is data heterogeneity (i.e. schema heterogeneity, semantic heterogeneity). Richer semantics of data is a major factor in resolving conflicts among heterogeneous data sources. As UML class model represents only schema-based semantics of data, alternative methods such as ontology is useful for representing additional semantics. This paper proposes a method for integrating two data sources with UML class models by using an analysis of their ontologies. In our framework, ontology will be applied to describe semantics of data in each source. Then the ontologies are analysed and compared to determine their similarities and differences. The result of the comparison is used to devise an integrated ontology that will enable querying on the integrated information.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.55-60
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• 2013

Smart client is a term describing an application environment which delivers applications over a web HTTP connection and does not require installation and/or updates. The term "Smart Client" is meant to refer to simultaneously capturing the benefits of a "thin client" (zero-install, auto-update) and a "fat client" (high performance, high productivity). A "Smart Client" application can be created in several very different technologies. Over the past few years, ITS has started to move towards smart clients, also called rich clients. The trend is a move from traditional client/server architecture to a Web-based model. More similar to a fat client vs. a thin client, smart clients are Internet-connected devices that allows a user's local applications to interact with server-based applications through the use of Web services. Smart Client applications in BIT bridge the gap between web applications and desktop applications. They provide the benefits of a web applicationwhile still providing the snappy look and feel inherent to desktop applications.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.45 no.1
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• pp.55-61
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• 2008

A real-time three-dimensional vision is a passive system, which would support various applications including collision avoidance, home networks. It is a good alternative of active systems, which are subject to interference in noisy environments. In this paper, we designed a SAD correlator with respect to resource usage for a real-time three-dimensional vision system. Regular structures, linear data flow and abundant parallelism make the correlation algorithm a good candidate for a reconfigurable hardware. We implemented two versions of SAD correlator in HDL and synthesized them to determine resource requirements and performance. From the experiment we show that the SAD correlator fits into reconfigurable hardware in marginal cost and can handle about 30 frames/sec with $640{\times}480$ images.

• Journal of Industrial Convergence
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• v.19 no.6
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• pp.109-121
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• 2021

This study was attempted to understand the phenomenon in depth by exploring the special experiences of occupational health nurses who guided occupational health nursing practice education. Participants were eight occupational health nurses who had experience teaching occupational health nursing practice for more than a semester. Data collected as focus groups were analyzed by phenomenological methods. As a result of the analysis, the experience of student practice education of occupational health nurses was derived into four categories: 'Nursing student practice education started from their own experiences', 'Proceeding nursing student practice despite difficulties', 'Feel rewarding' and 'Presenting alternatives'. An understanding the experience of nursing student practice education by occupational health nurses can be used as a reference to improve or develop occupational health nursing practice curriculum, such as establishing practice regulations suitable for the characteristics of occupational health nursing practice subjects.

• Journal of the Korean Geosynthetics Society
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• v.22 no.1
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• pp.25-37
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• 2023

Cellular Foundation Mattress made of new materials such as high density polyethylene, are not currently use for the foundation of small and medium-sized buildings in Korea. Therefore, they need to be developed and verified based on domestic ground and field conditions. This study presents the basic design and construction method of Cellular Foundation Mattress. Since the foundation reinforcement effect of Cellular Foundation Mattress should be evaluated and verified for soft ground, a performance comparison evaluation was conducted using the Soilbag method, which is commonly used for the foundation of small and medium-sized buildings in Korea. After the mattress reinforcement, the settlement amount decreased by 38.4% compared to the original ground and the bearing capacity increased by 159%, confirming the same ground reinforcement effect and ground stability as the Soilbag method.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.9-16
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• 2018

The purpose of this paper is to reveal the limitation of previous studies on curriculum re-construction and to suggest an alternative for curriculum re-construction. Through the literature review, this paper finds that previous studies quiet over the direction about selecting as well as organizing contents. In order to overcome the weaknesses of previous studies, this paper embraces the interest of learner for establishing the direction of curriculum reconstruction. To be more specific, this study shows that how can the ideas of growth, habit, and interest of John Dewey connect to contents-selecting and organizing in the process of instruction. As a result, this paper helps curriculum discourses to make progress for various direction and helps teachers to reconstruct the contents based on interests of their students.