• The Korean Journal of Archival Studies
• /
• no.59
• /
• pp.47-78
• /
• 2019

With the rapid changes in the digital technology, it is necessary to shift to a new paradigm corresponding to the changing environment was recognized. This study actively explores the possibility of applying new technologies for recordkeeping. This study aimed to investigate the applicability of blockchain to recordkeeping and to develop a new model for recordkeeping based on it. Through a conceptual analysis of blockchain and consideration of the recordkeeping process, a blockchain model that is suitable for the authentication of records was proposed. For this the network structure, the structure of blockchain blocks, a consensus algorithm, and recordkeeping blockchain model were designed. It also predicted potential changes in digital records management when applying blockchain. It predicted change in governance aspects to implement a horizontal cooperation system among the archives.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2020.11a
• /
• pp.21-22
• /
• 2020

This study is about high strength self-leveling mortar according to the mixing ratio of polymer. The self-leveling mortar currently released in Korea maintains a compressive strength of 40 Mpa as of 28 days. In addition, the level of bonding strength and flexural strength are kept the same. However, through this study, it is confirmed how the self-leveling mortar with a compressive strength of 60Mpa as of the 28th is shown according to the amount of polymer mixed. Experimental factors were configured according to the amount of polymer mixed, and the types of experiments were to confirm compressive strength, flexural strength, adhesion strength and flow. In addition, by confirming the early strength, a study was conducted to improve the quick workability compared to the self-horizontal mortar in the market.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2003.09b
• /
• pp.27-30
• /
• 2003

웹 기반하에서 사용자의 질의에 대한 효율적인 검색결과를 제공하기 위하여 다양한 검색 알고리즘들이 개발되어 왔으며, 이러한 알고리즘들의 대부분은 사용자의 선호도나 편의성을 고려하였다. 그러나 지금까지 개발된 검색 알고리즘들은 일반적으로 웹이라는 수평의 비계층적인 웹 환경에서 개발된 것으로서 기업의 전사적 네트워크와 같이 계층적이고 기능적으로 복잡하게 구성되어 있는 웹 기반 환경에서는 적용하기가 힘든 실정이다. 본 논문에서는 이러한 특수한 웹 기반 환경하에서 사용자에게 효율적으로 마이닝 결과를 제공할 수 있는 멀티-에이전트 기반의 웹 마이닝 시스템을 제안한다. 이를 위해 우리는 계층적 웹 기반 환경이라는 네트워크 모델을 제시하며, 제시된 웹 환경에서 적용할 수 있는 4개의 협력 에이전트와 14개의 프로세스 모듈을 가진 멀티-에이전트 기반의 웹 마이닝 시스템을 설계한다. 그리고 각 에이전트에 대한 세부기능을 계층적 환경을 고려하여 모듈별로 설명하며 특히, 새로운 머징 에이전트와 개선된 랭킹 알고리즘을 그래프 이론을 적용하여 제안한다.

• Communications of Mathematical Education
• /
• v.25 no.1
• /
• pp.47-61
• /
• 2011

The purpose of this study is to suggest a professional development system for elementary teachers who wish enhance mathematical teaching. The learning community on elementary mathematical teaching was composed of fourth grade teachers in a elementary school and an expert from education university. The activities was processed as establishing of objectives and contents of the learning community, discussing and seeing good lesson video, planning the lesson in collaboration with members, practicing the lesson, and reflecting on activities. To analyze these activities, record materials of meetings, lesson videos, member's writing were used. The results reported that the learning community lead teachers to search the method of professional development and showed itself as the effective media to enhance elementary mathematical teaching professionalism.

• Journal of the Economic Geographical Society of Korea
• /
• v.17 no.4
• /
• pp.632-645
• /
• 2014

This paper criticized the recent Korean 'creative economy policies' focused on regional developmental implications. Even though the policies targeted to promote ICT new startups and build virtuous circle of ICT industrial ecosystem in Korea as a whole, the outside regions of the Seoul-Busan industrial axis where the bases of ICT industries are very weak would suffer from systematic exclusion in ICT investments and deepening regional disparities. Second, ICT-centered policies would selectively affect or operate commensurate with the size of regions in this low-growth, after-financial crisis age. Third, the possibilities of regional insularity and lock-in in these low levels of 'related variety' regions would worsen the industrial competitiveness. Lastly, the policies should be reoriented to fortify region-based creative economic ecosystem based upon triple helix learning region.

• The Transactions of the Korea Information Processing Society
• /
• v.13 no.2
• /
• pp.76-90
• /
• 2024

Although artificial intelligence (AI) can be utilized in various domains such as smart city, healthcare, it is limited due to concerns about the exposure of personal and sensitive information. In response, the concept of distributed machine learning has emerged, wherein learning occurs locally before training a global model, mitigating the concentration of data on a central server. However, overall learning phase in a collaborative way among multiple participants poses threats to data privacy. In this paper, we systematically analyzes recent trends in privacy protection within the realm of distributed machine learning, considering factors such as the presence of a central server, distribution environment of the training datasets, and performance variations among participants. In particular, we focus on key distributed machine learning techniques, including horizontal federated learning, vertical federated learning, and swarm learning. We examine privacy protection mechanisms within these techniques and explores potential directions for future research.

• Journal of the Korea Convergence Society
• /
• v.10 no.7
• /
• pp.183-189
• /
• 2019

The change to the horizontal structure of the modern corporate management environment requires joint efforts and cooperation to share responsibility and purpose and to increase positive mutual influence in order to achieve the corporate goal beyond the individual capacity of the organizational members. In order to achieve the purpose of the organization, the organizational structure in which various members share information and aim at collective leadership is more effective than the structure concentrated on one individual (leader). This study was to examine the effectiveness of shared leadership, and to investigate the causal relationship and effect of shared leadership, organizational trust, and job performance. As a result of the analysis, shared leadership had a positive effect on organizational trust, and organizational trust had a positive effect on job performance. This means that high trust in organization has a positive effect on performance.This study is meaningful in that it examines the difference between shared leadership and existing leadership types that have not been studied yet.

• Journal of the Economic Geographical Society of Korea
• /
• v.16 no.4
• /
• pp.585-596
• /
• 2013

This study aims to identify the process by which local farmers are integrated into the transnational agri-food system. To that end, this study investigated the purpose and reality of the contract farming for Gold Kiwifruit between Zespri International, a transnational fruit producer based in New Zealand, and farmers in Seogwipo-si, Jeju Island. Through this contract farming, Jeju farmers were contributing to Zespri's global distribution strategy and helping the corporation meet local demand. In the process, local farmers were being integrated into the transnational agri-food system led by Zespri. In the cooperation between these two parties, the company took a limited role in providing production resources, and it consulted local producers in applying production technologies to local sites. Thanks to such practices, the company's influence on local farming was limited, and local farmers were able to function proactively in production. Therefore, the company and the farmers maintained a horizontal relationship.

• Korean Journal of Construction Engineering and Management
• /
• v.20 no.6
• /
• pp.11-22
• /
• 2019

Current construction project processes pose difficulties for construction management as inefficient communication between project participants seldom accurately reflects the needs of the owner. To solve this problem, lean construction-based Integrated Project Delivery (IPD), which facilitates cooperation and builds trust through the formation of horizontal relationships among participants, is becoming increasingly popular. However, although lean construction-based IPD improves productivity in the construction industry, few studies have focused specifically on developing effective methods that maximize the benefits gained from lean construction-based IPD. This study therefore analyzed success factors for lean construction-based IPD projects by analyzing prior studies to identify factors that support IPD success. Application methods were analyzed and an example of how they are actually used in the field was examined through an in-depth single case analysis. The findings of this research can be applied to support lean construction-based IPD projects in Korea, improving their efficiency and boosting owner satisfaction.

• Economic and Environmental Geology
• /
• v.47 no.2
• /
• pp.193-204
• /
• 2014

Shale gas has caused a change in the dynamics of gas market since development of horizontal drilling technic and hydraulic fracturing technic caused its commercial production. The commercial amount of shale gas is 187.5 trillions $m^3$ so human can use it for 59 years and the amount will increase in the future. Several nations such as USA, Canada, China and Russia have more and more interested in shale gas as a futuristic major energy source. In accordance with this trend in the world, the amount of studying theses for development of shale gas have increased so their theses became important increasingly. The number of searched theses (1986 ~ The first half of 2013) is 3,468 and has increased recently. Among 89 nations studying shale gas, USA has 637 theses as No.1 in the world. 1,813 global studying institutes have studied shale gas; in the analysis result of several studying institutes, US geological survey institute was ranked as No.1 for the quality level of shale gas study and intensity of global cooperation.