• Journal of Korean Home Economics Education Association
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• v.34 no.1
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• pp.81-96
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• 2022

The purpose of this study was to examine the extent to which the contents of elementary and secondary curricula are connected and overlapped in the 'family life' area of Practical Arts(Technology & Home Economics) subjects. The procedure and results are as were like below. First, the types of criteria for analyzing curriculum contents are developed. The connectivity are classified as 'discontinuous hierarchy' and 'spiral hierarchy' and duplication are classified as 'repetition (high level of overlapping)', 'reproducing', 'deepening (intermediate level of overlapping)', 'substitution', and 'omission (low level of overlapping)'. Second, as a result of analyzing the contents of elementary and secondary curricula, the 'Human Development' area showed higher connectivity with a deepening type of duplication. The 'Safety' and the 'Lifelong Planning' concepts showed lower connectivity. Third, as a result of analyzing the achievement standards of the 2015 Curriculum, the secondary Home Economics curriculum showed a considerable increase in the level of difficulty and the volume compared to the elementary curriculum. There was low connectivity between the contents of elementary and secondary curricula in the core concepts 'Safety' and 'Lifelong Planning', an intermediate level of connectivity in 'Life Culture' and 'Management', and high connectivity in 'Development' and 'Relationship'. Also, there was a high level of duplication in the core concepts 'Safety' and 'Lifelong Planning', being classified as 'reproducing', 'substitution', and 'omission', analyzed to have low connectivity. When structuring the curriculum contents with a spiral hierarchy, one should connect the elementary and secondary school contents organically: the hierarchy with core concepts considering the different characters of constructuring knowledge in each school level, with a moderate volume, with a moderate difficulty level, with a moderate level of duplication of the contents, and with the minimum level of repetition of the same topics within the same school level.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10c
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• pp.218-220
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• 1999

인터넷과 네트웍 기술의 급속한 성장에 따라 간단하고 효율적이며, 관리가 용이한 분산 어플리케이션의 필요성이 증대되었다. 이러한 요구사항을 만족시키기 위하여 네트워크 상에 분산되어 있는 자원, 서비스 및 객체의 공유와 이들 사이의 통신을 일관된 방법으로 지원하는 튜플스페이스(Tuple space) 시스템들이 제안되었다. 그러나, 기존의 시스템들은 서버를 통한 중앙 집중적인 공유공간(shared space) 구조를 가지고 있으므로 서버의 실패(crash)나 네트워크의 분할(partition)과 같은 전산망의 결함이 발생하였을 경우 지속적인 서비스를 제공할 수 없게 된다. 본 논문에서는 특정 목적에 따라 그룹화된 공유공간의 생성이 가능하고 객체를 관련노드에 중복(replication)해서 저장할 수 있는 튜플스페이스 시스템인 ObjectSpace의 설계 및 구현에 대하여 설명한다. ObjectSpace는 객체를 공유하기 위하여 공유공간에 객체를 저장하는 기능과 공유된 객체를 조회하는 기능을 제공한다. 중복된 객체들에 대하여 일관성을 유지하기 위하여 그룹을 지원하는 JACE 그룹통신시스템을 하부구조로 사용하여 구현하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.69-71
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• 2000

XML은 사용자가 문서를 적절히 구조화해서 저장시킬 수 있는 장점으로 인해 기존의 HTML로 구축된 웹서비슬 환경을 데이터베이스화하여 다양하고 복잡한 검색 환경을 제공한다. 이러한 이유로 최근에 XML 문서를 데이터베이스에 저장하고 효율적인 관리 및 검색을 지원하는 연구들이 많이 진행되고 있다. 기존 연구를 살펴보면 XML의 구조적 특징을 문서 독립적으로 모델링하지 않아 갱신 및 검색 효율이 떨어지고, 생성되는 테이블의 수가 증가하며, 원문 복원 능력의 저하와 데이터 중복이 발생하는 문제점을 안고 있다. 따라서 본 논문에서는 관계 데이터베이스를 기반으로 XML문서의 구조 정보를 DTD 독립적으로 구성하여 테이블 생성 수와 갱신의 문제점을 개선하고, DTD 구조의 경로 정보 표현을 제안하여 탐색 및 원문 복원 능력을 강화하며, 테이블 중복 문제를 해결한 데이터 모델을 제안한다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.522-524
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• 2000

본 연구에서는 통합 멀티미디어 통신시스템을 구축하기 위한 CASE 도구의 개발에서 시스템 구축에 필요한 객체를 설계, 확장하거나, 설계된 객체의 재사용성을 높이기 위한 방안으로 패턴지향형정보저장소를 설계하였다. 그리고 시스템 구축에 필요한 객체의 재사용시 중복성을 피하며 복잡도를 감소시키기 위해 CASE 도구의 설계단계에서 객체를 통합관리/이용할 수 있도록 하고, 재사용에 필요한 객체를 패턴화하여 저장함으로써 저장소의 재사용 효율성을 증가시킨다. 따라서 본 연구에서는 정보저장소에 저장된 패턴-객체의 재사용시 유지보수 비용을 감소시키고 멀티미디어의 특성을 수용할 수 있도록 표준화된 단일 패턴-객체와 이를 이용한 복합 패턴-객체로 확장 가능하도록 혼합형 정보저장소를 설계하였다.

• The Journal of the Korea Contents Association
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• v.6 no.2
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• pp.105-116
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• 2006

With the development of IT technology, the amount of digital contents used in various environments of wired/wireless networks have been increased hugely and rapidly To protect the loss of the digital contents from the sudden accident, continuous data backup is required. In this paper, we design and implement the backup system that stores digital contents in backup storage by objectifying the contents with a unit of I/O size and giving them the unique E using the properties of digital contents to avoid duplicated store of the same data. The backup system reduces the amount of backup data efficiently by backing up the only one copy of the duplicated data. as a result, the backup system can back up the digital contents more efficiently in a constrained storage space.

• Proceedings of Korean Society of Archives and Records Management
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• 2019.05a
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• pp.61-67
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• 2019

Recently, the central government organizations have changed their Business Management System to the cloud-based On-nara Document 2.0. According to this, the National Archives of Korea is spreading a cloud-based records management system. With the development of digital technology, including cloud computing, preservation and utilization of records must be redesigned continuously to be effective and efficient. It is needed that the process and method of the electronic records management will change from simple digitization of paper-based recording to digital technology. This article offers opinions related to the logical transfer, storage and redundancy elimination of digital objects, machine-readable format, big-data analysis, templates of official documents, and authenticity authentication system based on universally unique identifiers (UUID) and hash value.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.42 no.3 s.303
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• pp.9-16
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• 2005

For designing the database more efficiently, normailzation can be enforced to minimize the degree of unnecessary data redundancy and contribute to enhance data integrity. However, deep normalization tends to provoke multiple way of schema join, which could then induces response time degradation. To mitigate this sort of side effect that the normalization could brought, a number of field studies we observed adopted the idea of denormalization. To measure whether denormalization contributes to response time improvement, we in this paper developed two different data models about customer service system, one with perfect normalization and the other with denormalization, and evaluated their query response time behaviors. Performance results show that normalization case consistently outperforms denormalization case in terms of response time. This study show that the idea of denormalization, quite rarely contributes to that sort of improvement due ironically to the unnecessary data redundancy.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.340-341
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• 2007

In case of Busan Port container terminals scale of a yard device chapter is small and narrow, and redundant works of device chapter facilities ability and transfer cranes are misgovernment occurring very much bemuse of this There is to the misgovernment that cannot support design ability of a container crane of quay because of this There is this in a change of marine transportation harbor environment to cross over to a large easel next of a ship, and a large problem cannot but become. Watched how redundant works were occurring in the second yards, and presented a problem Also, present the hint point tint these redundant works analyze how productivity of quay productivity and container crane is improved if solution works, and face to this.

• Journal of Broadcast Engineering
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• v.1 no.1
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• pp.67-73
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• 1996

In general, the high quality audio coding(HQAC) has the structure of the convertional data compression techniques combined with moodels of human perception. The primary auditory characteristic applied to HQAC is the masking effect in the spectral domain. Therefore spectral techniques such as the subband coding or the transform coding are widely used[1][2]. However no effort has yet been made to apply the temporal masking effect and temporal redundancy removing method in HQAC. The audio data compression method proposed in this paper eliminates statistical and perceptual redundancies in both temporal and spectral domain. Transformed audio signal is divided into packets, which consist of 6 frames. A packet contains 1536 samples($256{\times}6$) :nd redundancies in packet reside in both temporal and spectral domain. Both redundancies are elminated at the same time in each packet. The psychoacoustic model has been improved to give more delicate results by taking into account temporal masking as well as fine spectral masking. For quantization, each packet is divided into subblocks designed to have an analogy with the nonlinear critical bands and to reflect the temporal auditory characteristics. Consequently, high quality of reconstructed audio is conserved at low bit-rates.

• Journal of the Korean Institute of Intelligent Systems
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• v.9 no.4
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• pp.389-395
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• 1999

최근 몇 년간 생물학적 발생에 대한 구조 및 둥작원리의 모델링에 대한 빠른 진전이 일어나고 있다. 세포자동자(cellular automata CA)와 린드마이어-시스템(L-system)은 다세포의 대표적인 발생/발달 모델이다. L-시스템은 식물의 그래픽 표현에 적용되어 오고 있으며 CA는 인고생명의 연구모델과 인공두뇌의 건축 등의 분야에 적용되어 오고 있다, 현재까지 CA와 L-시스템의 발생규칙은 설계자의 설계에 의존하고 있다. 그러나 진화연사방법을 도입하면 CA와 L-시스템을 자동으로 설계할수 있다. 발생규칙의 진화를 위해서는염색체의 코트화가 필요하다. DNA 코딩방법은 유전자의 중복과 여분을 가지고 있으며 규칙의 표현에 적합한 코딩방법이다. 본 논문에서는 CA와 L-시스템의 규칙을 진화시키기 위한 DNA 코딩 방법을 제안한다.