• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.51-58
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• 2018

In order to utilize various data provided by Korea public open data portal, data should be systematically managed using a database. Since the range of open data is enormous, and the amount of data continues to increase, it is preferable to use a database capable of processing big data in order to analyze and utilize the data. This paper proposes data modeling and implementation method suitable for public data. The target data is subway related data provided by the public open data portal. Schema of the public data related to Seoul metro stations are analyzed and problems of the schema are presented. To solve these problems, this paper proposes a method to normalize and structure the subway data and model it in NoSQL database. In addition, the implementation result is shown by using MongDB which is a document-based database capable of processing big data.

• Journal of Construction Engineering and Project Management
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• 제6권1호
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• pp.11-19
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• 2016

Most of the Indian contractors are not well equipped to handle the growing demand of infrastructure development; hence construction projects frequently run in to time and cost overruns, disputes and quality issues. This study aims to improve the construction industry in India by implementing lean principles to eliminate non-value adding activities (wastes). The purpose of this study is to 1) identify the wastes and their sources affecting the construction process, and 2) to identify problems and document lessons by applying a Last Planner System (LPS) to a sample project. First, the researchers identified that Delays, Rework, and Interruptions were the most critical wastes affecting the construction process and Poor management control, Poor Planning and Shortage of Resources were the major sources of the above mentioned wastes. Second, the researchers report the Percent of Planned Complete (PPC) analysis results and experienced problems after implementation of LPS at the sample project. It was observed that much more improvement could have been achieved if there was consensus between the owners and the contractor on the implementation of the LPS in its entirety. Some of the problems experienced in the implementation of the LPS like lack of scheduling, resource and material shortage were found to be similar to those in developed countries.

• 한국컴퓨터산업학회논문지
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• 제3권9호
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• pp.1215-1222
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• 2002

본 논문은 XML을 이용하여 통합적인 문제를 생성, 검색 및 교육에 적용할 수 있는 XML기반 문제은행 시스템의 설계 및 구축에 관한 연구이다. 표준화된 문제를 학습자에게 제공하기 위하여 문제의 표준 유형을 분석하고 이를 XML DTD로 설계하였다. 설계된 표준안을 적용하여 초등학교 수학 교육용 문제를 추출하였으며 관계형 DB를 이용하여 문제은행을 구축하였다. 또한 XML파서와 문제 해석기를 구현하여 표준화된 문제를 온라인으로 학습자에게 제공하였다. 시스템의 활용 결과 온라인 교육에 필요한 평가용 문항을 학습자에게 적절하게 제공하고 웹 상의 비표준화된 문제들을 통합시키는데 매우 효율적으로 적용시킬 수 있음을 보였다.

• 기술혁신학회지
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• 제6권1호
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• pp.74-91
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• 2003

Science and Technology University(STU) will be established by twenty-two government institutes next year. STU has latent problems with geographical limitations caused by organizing the faculties and facilities of the government research institutes, which are located all over the country. This study tries to examine the Educational Administration(Opreation) Model of STU and analyse expected problems and further, proposes the introduction of cyber education system which will maximize efficiency of educational operation of the system and enhance learning. It also discusses the practical problems in the implementation of cyber education system.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2002년도 가을 학술발표회 논문집
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• pp.203-210
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• 2002

The great advantages on the Genetic Algorithms(GAs) are ease of implementation, and robustness in solving a wide variety of problems, several GAs based optimization models for solving complex structural problems were proposed. However, there are two major disadvantages in GAs. The first disadvantage, implementation of GAs-based optimization is computationally too expensive for practical use in the field of structural optimization, particularly for large-scale problems. The second problem is too difficult to find proper parameter for particular problem. Therefore, in this paper, a Distributed Hybrid Genetic Algorithms(DHGAs) is developed for structural optimization on a cluster of personal computers. The algorithm is applied to the minimum weight design of steel structures.

• 한국정보처리학회논문지
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• 제6권1호
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• pp.49-56
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• 1999

Distributed object Computing, owing to the development of distributed computing, has improved the performance of distributed processing conducted between homogeneous and heterogeneous systems in network. However, it has failed to solve fundamental problems such as network overload and enormous requests demands by servers and clients. In this paper, we propose to design and implement an Object Migration system that uses the java language to tackle the mentioned problems. As the first step of the implementation of the system, we justify the characteristics of t도 mobile object model that keeps codes and states of an object. Implemented Object Migration System would accept objects being migrated to a specific node and support the virtual place in which objects could be executed automatically. Therefore, the Object Migration system we suggest could not only solve problems imposed to traditional distributed computing but also offer transparency of object migration between homogeneous and heterogeneous systems.

• 한국과학교육학회지
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• 제15권1호
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• pp.73-79
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• 1995

The purpose of this study was to investigate Korean secondary school students' perceptions of science and technology related social problems and STS education to ascertain the extent to which the current science programs incorporate STS themes. Students indicated that STS related problems or STS issues were given little attention in their science classes, even though they believed that studying those problems would be important. Results of the study support the contention of need for more attention to the implementation of STS themes into current Korean science education.

• International Journal of Computer Science & Network Security
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• 제21권9호
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• pp.323-331
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• 2021

The relevance of the study implies the need to explain the main determinants of environmental policy, allowing countries to converge on a common working basis. The purpose of the research is to explore ways in which the environmental aspects of EU regions and territories can be shaped to apply to domestic environmental policy. A total of 997 representatives from the Ukrainian UTCs, who are involved in local environmental policy, participated in the survey. Results of the research. A hierarchy of regional environmental policy objectives has been identified. Three key principles of eco-policy development have been distinguished. The means of the innovative approach strategy implementation have been outlined (formation of the regional market of environmental services; organization of interaction between environmental agencies and market structures; establishment of environmental funds which finance environmental activities; implementation of the "collateral return" system; formation of a system of benefits and loans to enterprises that successfully implement the environmental policy). The means of the prognostic approach implementation strategy to the development of the region's environmental policy have been determined (the use of an orderly and successful long-term strategy of economic development of the region; obligatory consideration in the mechanisms strategy aimed at improvement of environmental management system of the region, interbranch impact of the projects implemented on the region's ecological situation; taking into consideration the economic and geographical peculiarities of the region, the necessary infrastructure, issues of the territorial location of the large enterprises in the region and their impact on the environment). The means of the traditional approach strategy implementation have been outlined (activity programs focused on solution of specific problems, rather than on the implementation of measures for environmental restoration and enhancement; nature conservation problems have interbranch, interdepartmental character due to unity of the region's ecosystem; tracking complexity of changing conditions (water basins, woodlands, air-mass transport), regional boundaries generally do not coincide with natural ecosystems boundaries). The practical significance of the study lies in providing recommendations for the implementation of certain aspects of Ukrainian UTC's environmental policy.

• Transactions on Electrical and Electronic Materials
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• 제13권5호
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• pp.256-261
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• 2012

Recently, many photovoltaic systems (PV systems) including solar parks and PV farms have been built to prepare for the post fossil fuel era. To investigate the degradation process of the PV systems and thus, efficiently operate PV systems, there is a need to visually monitor PV systems in the range of infrared ray through the Internet. For efficient visual monitoring, this paper explores a multithreaded implementation of a recently developed HEVC standard whose compression efficiency is almost two times higher than H.264. For an efficient parallel implementation under a meshbased 64 multicore system, this work takes into account various design choices which can solve potential problems of a two-dimensional interconnects-based 64 multicore system. These problems may have not occurred in a small-scale multicore system based on a simple bus network. Through extensive evaluation, this paper shows that, for an efficient multithreaded implementation of HEVC intra prediction in a mesh-based multicore system, much effort needs to be made to optimize communications among processing cores. Thus, this work provides three design choices regarding communications, i.e., main thread core location, cache home policy, and maximum coding unit size. These design choices are shown to improve the overall parallel performance of the HEVC intra prediction algorithm by up to 42%, achieving a 7 times higher speed-up.

• 한국정보통신학회논문지
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• 제13권1호
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• pp.29-36
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• 2009

본 논문은 모바일 폰 카메라의 적용을 위한 자동노출 (AE, Auto Exposure)기능의 알고리즘 및 하드웨어 설계에 관한 것이다. 자동노출기능은 카메라로 촬영하기 위한 피사체의 밝기를 적절하게 하기 위해 자동으로 노출을 조정해 주는 기능이며 기존의 자동노출 기능은 마이크로 컨트롤러(MCU)에 의해 수행됨으로써 고비용과 느린동작속도 등의 문제점이 있었다. 본 논문에서는 마이크로 컨트롤러를 사용하지 않고 하드웨어로 구현 가능한 자동노출 기능의 알고리즘을 개발함으로써 시스템의 제작비용 및 동작 속도 등 기존 시스템에 대한 단점을 개선할 수 있도록 하였다. 하드웨어 자원사용의 효율성을 고려하여 알고리즘을 제안하였으며 제안된 알고리즘의 하드웨어 설계와 설계된 시스템을 실제 모바일 폰 카메라 센서에 적용하여 테스트함으로써 개발된 자동노출 기능을 확인하였다.