• 디지털산업정보학회논문지
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• 제18권3호
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• pp.25-32
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• 2022

DID(Decentralized Identity Identification) is a system in which users voluntarily manage their identity, etc., and control the scope and subject of submission of identity information based on a block chain. In the era of the 4th industrial revolution, where the importance of protecting personal information is increasing day by day, DID will surely be positioned as the industrial center of the Internet and e-business. However, when managing personal information, DID is highly likely to cause a large amount of personal information leakage due to electronic infringement, such as hacking and invasion of privacy caused by the concentration of user's identity information on global service users. Therefore, there are a number of challenges to be solved before DID settles into a stable standardization. Therefore, in this paper, we try to examine what problems exist in order to positively apply the development of DID technology, and analyze the improvement plan to become a stable service in the future.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2011년도 추계학술대회
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• pp.419-432
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• 2011

In this study, small and medium-sized manufacturers recently on the status of the various manpower survey through graphs and charts comprehensively and objectively cosider the causes for lack of manpower and would like to establish countermeasures for it.

• 가족자원경영과 정책
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• 제14권4호
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• pp.193-212
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• 2010

The pre-elderly approaching old age in our society confront having a harsh economic status. The main purpose of this study was to explore the factors influencing the preparation of the pre-elderly for overcoming this status. In particular, it focused on financially stable pre-elderly persons. The data from the 2008 Chungcheongnam-do Welfare Plan for Five Years collected by the Chungnam Women's Policy Development Institute was used to analyze the research questions. The participants in this study included 735 persons (ages 55-64) living in Chungcheongnam-do. Five hundred and eighty-one self-reported questionnaires were used for the final analysis using SAS, version 9.1. This study attempted to identify the important variables needed to find the factors related to socio-demographic and economic characteristics, the adult-child relationship, the preparation plan for old age, etc. The results showed that job and health status were key to preparation for financial stability among the elderly. Another finding was the importance of concrete financial planning for the elderly; that is to say, the pre-elderly who made more concrete plans than indefinite ones were likely to belong to stable households. Another significant finding was that it is important to consider both objective and subjective factors for the financial preparation of the elderly. These results should serve as reference data for the future welfare policy for the elderly, because the financial independence of the elderly will be vital for a healthy relationship between new and old generations.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.443-449
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• 2022

With climate change and the global population growth, the frequency and scope of wildfires are constantly increasing, which threatened people's lives and property. For example, according to California Department of Forestry and Fire Protection, in 2020, a total of 9,917 incidents related to wildfires were reported in California, with an estimated burned area of 4,257,863 acres, resulting in 33 fatalities and 10,488 structures damaged or destroyed. At the same time, the ongoing development of technology provides new tools to simulate and analyze the spread of wildfires. How to use new technology to reduce the losses caused by wildfire is an important research topic. A potentially feasible strategy is to simulate and analyze the spread of wildfires through computing technology to explore the impact of different factors (such as weather, terrain, etc.) on the spread of wildfires, figure out how to take preemptive/responsive measures to minimize potential losses caused by wildfires, and as a result achieve better management support of wildfires. In preparation for pursuing these goals, the authors used a powerful computing framework, Spark, developed by the Commonwealth Scientific and Industrial Research Organization (CSIRO), to study the effects of different weather factors (wind speed, wind direction, air temperature, and relative humidity) on the spread of wildfires. The test results showed that wind is a key factor in determining the spread of wildfires. A stable weather condition (stable wind and air conditions) is beneficial to limit the spread of wildfires. Joint consideration of weather factors and environmental obstacles can help limit the threat of wildfires.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권6호
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• pp.575-596
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• 2009

Facing limited network resources such as bandwidth and processing capability, the Internet will have congestion from time to time. In this paper, we propose a scheme to maximize the total utility offered by the network to the end user during congested times. We believe the only way to achieve our goal is to make the scheme application-aware, that is, to take advantage of the characteristics of the application. To make our scheme scalable, it is designed to be class-based. Traffic from applications with similar characteristics is classified into the same class. We adopted the RED queue management mechanism to adaptively control the traffic belonging to the same class. To achieve the optimal utility, the traffic belonging to different classes should be controlled differently. By adjusting link bandwidth assignments of different classes, the scheme can achieve the goal and adapt to the changes of dynamical incoming traffic. We use the control theoretical approach to analyze our scheme. In this paper, we focus on optimizing the control on two types of traffic flows: TCP and Simple UDP (SUDP, modeling audio or video applications based on UDP). We derive the differential equations to model the dynamics of SUDP traffic flows and drive stability conditions for the system with both SUDP and TCP traffic flows. In our study, we also find analytical results on the TCP traffic stable point are not accurate, so we derived new formulas on the TCP traffic stable point. We verified the proposed scheme with extensive NS2 simulations.

• 수산경영론집
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• 제44권3호
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• pp.61-76
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• 2013

This study is aimed to present measures for stable supply of fishmeal and to develop fish farming into a food industry and an export industry. The study analyzed current domestic and international supply and demand for fishmeal and suggested future prospects. The results of the study suggested the basic directions for the stable supply of fishmeal in Korea as follows: first, stable securing of fishmeal importers and establishment of the supply and demand monitoring system; second, policies to boost using of compound feeds and expansion of relevant fishmeal use; third, higher competitiveness of fishmeal and compound feeds through selective and intensive R&D investments. Based on the basic directions, the paper suggested implementation measures such as strengthening of cooperations with fishmeal suppliers abroad, expansion of overseas local market entrance, diversification of fishmeal trading countries, revision of relevant laws and polices on the fishmeal and feeds, organization of domestic fishmeal, promotion of group purchase, improvement of domestic fish meal quality, development of fish meal alternatives, etc.

• 경영과학
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• 제16권1호
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• pp.203-218
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• 1999

This study presents a diagnosis of SI project environment and risk management practices in Korea. In particular, the stability of project environment, required skills for project managers, risk factors and usefulness of risk management activities are surveyed and analysed. Factor analysis and correlation analysis are performed to investigate any significant relationships among various risk management factors. The results indicate that SI project environment is not stable in Korea, and risk management can be a primary project management tool to deal with the situation. The results also that there's little significant difference in understanding not only between the clients and developers, but alto between the experienced managers and less experienced managers.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 1998년도 The 12th Asia Quality Management Symposium* Total Quality Management for Restoring Competitiveness
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• pp.287-292
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• 1998

As business looks towards the $21^{\st}$ century, a long-term strategy that focuses on global sourcing will be the vital factor in whether companies win or lose. At the same time, with electronic components, it is important to ensure stable quality and reliability, together with other important parameters. In order to achieve this, creating an effective mechanism of failure analysis and database management for electronic components is essential. The authors introduce the actual mechanism employed by NEC and explain the ideas and insight they have obtained from their experience.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.327-328
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• 2021

In the manufacturing process of ready-mixed concrete, quantity management directly affects the workability and strength of concrete. Therefore, water quantity is the most important management factor for water quality control of ready-mixed concrete. It can be said that the number of unit water in the mix design, the water quantity due to the surface water contained in the aggregate used, and the water quantity taking into account the concentration of sludge contained in the recycling water when using the recycling water are factors that affect the quantity management of ready-mixed concrete. In this study, as a stable quality control method of ready-mixed concrete, a quantity management method by aggregate surface water and a sludge concentration management method according to the use of recycling water were proposed. Thus, we tried to suggest an efficient quantity management method for stabilizing the quality of ready-mixed concrete.

• 한국가정과교육학회지
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• 제22권1호
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• pp.79-96
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• 2010

본 연구의 목적은 청소년의 가족건강성에 따른 금전사용양식과 금전관리행동의 차이를 검증하는데 있다. 자료분석에는 고등학생 914명이 응답한 설문지를 사용하였으며, 통계분석방법으로는 신뢰도계수(Cronbach'$\alpha$) 산출, t검정, 일원분산분석과 사후검정으로 Duncan의 다중비교분석을 실시하였다. 연구결과는 다음과 같이 요약할 수 있다. 조사대상 청소년의 기족건강성 점수는 3.36(5점 만점)으로 중간정도의 성향을 보였다. 금전사용양식은 안정형, 과시형, 무관심형으로 구성되었으며 무관심형의 평균이 3.33, 안정형은 3.01, 과시형은 2.91이었다. 금전관리행동은 계획, 수행, 평가, 저축으로 이루어졌으며, 계획이 2.81점, 실행이 2.87점, 명가가 2.90점, 저축이 2.50점으로 나타났다. 가족건강성이 높은 청소년은 금전을 통해 안정을 추구하는 경향과 과시를 추구하는 경향이 높았다. 청소년의 가족건강성 지각은 자신의 금전관리행동에도 유의한 정적 차이를 나타내어 자신의 가정을 건강하게 지각할수록 합리적인 금전관리행동을 하였다.