• 한국작물학회:학술대회논문집
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• 한국작물학회 2005년도 국제학술회의
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• pp.22-46
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• 2005

Spatial and timely information on crop and filed conditions is one of the most important basics for rational and efficient planning and management in agriculture. Remote sensing, GIS, and modeling are powerful tools for such applications. This paper presents an overview of the state of the art in remote sensing of crop and field conditions with some case studies. It is also shown that a synergistic linkage between process-based models and remote sensing signatures enables us to estimate the multiple crop/ecosystem variables at a dynamic mode. Remotely sensed information can greatly reduce the uncertainty of simulation models by compensating for insufficient availability of data or parameters. This synergistic approach allows the effective use of infrequent and multi-source remote sensing data for estimating important ecosystem variables such as biomass growth and ecosystem $CO_2$ flux. This paper also shows a geo-spatial information system that enables us to integrate, search, extract, process, transform, and calculate any part of the data based on ID#, attributes, and/or by river-basin boundary, administrative boundary, or boundaries of arbitrary shape/size all over Japan. A case study using the system demonstrates that the nitrogen load from fertilizer was closely related to nitrate concentration of groundwater. The combined use of remote sensing, GIS and modeling would have great potential for various agro-ecosystem applications.

• 한국재난정보학회 논문집
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• 제7권4호
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• pp.294-304
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• 2011

방재자원은 재난 발생시 투입하는 인력, 물자, 장비, 시설 자원을 의미한다. 물자, 장비 자원은 평상시 내부적으로 관리되는 자원으로 신속하고, 적합한 자원을 투입하여 재난을 최소화하여야 한다. 그렇지만 현재 방재자원 관리는 시군구의 재난관리시스템과 중앙의 재난관리시스템으로 이원화되어 있으며, 정보의 갱신이 실시간으로 되어있지 않아서 적시에 적합한 자원을 투입하기에 어려운 상태이다. 본 연구에서는 시군구에 분산된 방재차원에 대한 효과적인 관리를 통하여 가시성을 확보함으로써 적시에 적합한 자원을 투입할 수 있는 모델을 제시하고 있다. 특히 적합한 자원을 신속하게 파악할 수 있게 방재자원을 분류하고, RFID 표준에 기반한 방재자원의 ID와 메타데이터 정보를 제시하고, 이를 기반으로 실시간으로 방재 차원을 관리할 수 있는 모텔을 제시하였다.

• Journal of Korean Biological Nursing Science
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• 제22권1호
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• pp.23-35
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• 2020

Purpose: Compliance in kidney transplant recipients is critical for a positive prognosis. Especially compliance with medications after kidney transplantation is a major health care issue with implications for graft rejection and graft loss. But the definition of compliance in transplantation varies among centers. The purpose of this study was to clarify the concept of compliance in kidney transplant recipients. Methods: A literature search was conducted using RISS, MEDLINE, CINAHL. The concept analysis was guided by the methodology posited by Walker and Avant. Results: In this study, we found the attributes of the concept: 'compliance with immunosuppressive medication', 'compliance with follow-up', 'compliance with early detection of graft rejection and complication', and 'compliance with prevention of complication'. The antecedents of 'compliance in kidney transplant recipients' included 'having a kidney transplant surgery' and 'normal function of transplanted kidney'. The consequences of 'compliance in kidney transplant recipients' included 'affecting the function of the transplanted kidney' and 'affecting the health of kidney transplant recipients. Conclusion: This study may contribute to the development of tools for measuring compliance in kidney transplant recipients, as well as benefit nursing interventions research to increase compliance in kidney transplant recipients.

• 대한교통학회:학술대회논문집
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• 대한교통학회 2000년도 제37회 학술발표회논문집
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• pp.25-47
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• 2000

In route guidance systems fastest-path routing has typically been adopted because of its simplicity. However, empirical studies on route choice behavior have shown that drivers use numerous criteria in choosing a route. The objective of this study is to develop computationally efficient algorithms for identifying a manageable subset of the nondominated (i.e. Pareto optimal) paths for real-time vehicle routing which reflect the drivers' preferences and route choice behaviors. We propose two pruning algorithms that reduce the search area based on a context-dependent linear utility function and thus reduce the computation time. The basic notion of the proposed approach is that ⅰ) enumerating all nondominated paths is computationally too expensive, ⅱ) obtaining a stable mathematical representation of the drivers' utility function is theoretically difficult and impractical, and ⅲ) obtaining optimal path given a nonlinear utility function is a NP-hard problem. Consequently, a heuristic two-stage strategy which identifies multiple routes and then select the near-optimal path may be effective and practical. As the first stage, we utilize the relaxation based pruning technique based on an entropy model to recognize and discard most of the nondominated paths that do not reflect the drivers' preference and/or the context-dependency of the preference. In addition, to make sure that paths identified are dissimilar in terms of links used, the number of shared links between routes is limited. We test the proposed algorithms in a large real-life traffic network and show that the algorithms reduce CPU time significantly compared with conventional multi-criteria shortest path algorithms while the attributes of the routes identified reflect drivers' preferences and generic route choice behaviors well.

• 지역사회간호학회지
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• 제30권1호
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• pp.1-10
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• 2019

Purpose: This study tries to analyze the concept of Yangsaeng in the Korean aged, with focus on nursing. Methods: Rodgers' evolutionary approach was used to identify the common definitions, attributes, antecedents, and consequences of the Yangsaeng concept for the aged. Literature search was conducted at the NAL, NDSL, RISS, ProQuest, PubMed, AMED, and MEDLINE databases from 2004 to 2016, using the keywords "Yangsaeng," "health promotion," "health management," "traditional oriental methods," and "traditional oriental nursing."Finally, 20 relevant articles were selected and thoroughly reviewed. Results: The analysis shows that the model of Yangsaeng for the Korean aged is that of personal adaptive-capacity, totality, challenging, and coping resource and includes physical, social and psychological health and wellness. Conclusion: This work provides some implications on the development of nursing intervention related with Yangsaeng for the Korean aged, and suggests the implementation of such intervention in the practice of Yangsaeng for the Korean aged. Therefore, a better understanding of the Korean aged and Yangsaeng within the context of nursing can be achieved.

• International Journal of Computer Science & Network Security
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• 제22권6호
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• pp.212-222
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• 2022

There has been a rapid increase in the use of cloud email services. As a result, email encryption has become more commonplace as concerns about cloud privacy and security grow. Nevertheless, this increase in usage is creating the challenge of how to effectively be searching and filtering the encrypted emails. They are popular technologies of solving the issue of the encrypted emails searching through searchable public key encryption. However, the problem of encrypted email filtering remains to be solved. As a new approach to finding and filtering encrypted emails in the cloud, we propose a ciphertext-based encrypted policy attribute-based encryption scheme and keyword search procedure based on hidden policy ciphertext. This feature allows the user of searching using some encrypted emails keywords in the cloud as well as allowing the emails filter-based server toward filter the content of the encrypted emails, similar to the traditional email keyword filtering service. By utilizing composite order bilinear groups, a hidden policy system has been successfully demonstrated to be secure by our dual system encryption process. Proposed system can be used with other scenarios such as searching and filtering files as an applicable method.

• 유통과학연구
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• 제21권10호
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• pp.85-95
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• 2023

Purpose: Virtual reality's impact on fashion distribution extends beyond singular transactions, facilitating the emergence of novel collaborations. As investigating the characteristics of fashion distribution channels in virtual reality, this study explores how the fashion industry can utilize virtual reality distribution channels to their maximum capacity while minimizing potential disadvantages. Research design, data, and methodology: The approach used to gather previous studies for this study adheres to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) methodology. This method is widely acknowledged and recommended for its systematic and transparent approach to selecting relevant literature. This kind of literature search plays a vital role in a systematic evaluation as it informs the results. Results: The finding indicates consistently a total of eight kinds of characteristics of fashion distribution channels in virtual reality. The result means that the attributes of fashion distribution channels in virtual reality are causing significant changes in the fashion industry, revolutionizing the consumer experience, and redefining the parameters of creativity and collaboration. Conclusions: In sum, the global reach and accessibility of modern technology enhance the capacity of fashion companies to expand their market presence. This facilitates their participation in intercultural interactions and allows them to serve a wide range of customers.

• 산경연구논집
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• 제14권8호
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• pp.1-8
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• 2023

Purpose: This research aims to identify positive connections between digital fashion product value and consumer purchase behavior. The research tries to offer valuable insights and implications for fashion industry practitioners, enabling them to harness the power of the Metaverse to enhance customer engagement, drive sales, and stay ahead in this ever-evolving digital landscape. Research design, data and methodology: The research design for this study is a systematic literature review. A systematic and rigorous approach was adopted to ensure the reliability and validity of the research findings. By conducting this kind of approach to achieve the purpose of the study, this research aims to comprehensively analyze existing academic articles, peer-reviewed journals, and relevant publications related to the topic. Results: According to various academic search engines, the results revealed several dimensions of value associated with digital fashion products on the Metaverse platform, which significantly influence consumer perceptions. These dimensions of value extend beyond traditional tangible attributes and are uniquely shaped by the immersive and interactive nature of the virtual environment. Conclusions: All in all, the findings highlighted the significance of experiential value in driving purchase behavior. Creating immersive and interactive virtual shopping experiences emerged as a crucial strategy for fashion industry practitioners to engage potential consumers effectively.

• 지능정보연구
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• 제22권3호
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• pp.143-163
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• 2016

인구통계학적 정보는 디지털 마케팅의 핵심이라 할 수 있는 인터넷 사용자에 대한 타겟 마케팅 및 개인화된 광고를 위해 고려되는 가장 기초적이고 중요한 정보이다. 하지만 인터넷 사용자의 온라인 활동은 익명으로 행해지는 경우가 많기 때문에 인구통계특성 정보를 수집하는 것은 쉬운 일이 아니다. 정기적인 설문 조사를 통해 사용자들의 인구통계특성 정보를 수집할 수도 있지만 많은 비용이 들며 허위 기재 등과 같은 위험성이 존재한다. 특히, 모바일 환경에서는 대부분의 사용자들이 익명으로 활동하기 때문에 인구통계특성 정보를 수집하는 것은 더욱 더 어려워지고 있다. 반면, 인터넷 사용자의 온라인 활동을 기록한 클릭스트림 데이터는 해당 사용자의 인구통계학적 정보에 활용될 수 있다. 특히, 인터넷 사용자의 온라인 행위 특성 중 하나인 페이지뷰는 인구통계학적 정보 예측에 있어서 중요한 요인이 된다. 본 연구에서는 기존 선행 연구를 토대로 클릭스트림 데이터 분석을 통해 인터넷 사용자의 온라인 행위 특성을 추출하고 이를 해당 사용자의 인구통계학적 정보 예측에 사용한다. 또한, 1)의사결정나무를 이용한 변수 축소, 2)주성분분석을 활용한 차원축소, 3)군집분석을 활용한 변수축소의 방법을 제안하고 실험에 적용함으로써 많은 설명변수를 이용하여 예측 모델 생성 시 발생하는 차원의 저주와 과적합 문제를 해결하고 예측 모델의 정확도를 높이고자 하였다. 실험 결과, 범주의 수가 많은 다분형 종속변수에 대한 예측 모델은 모든 설명변수를 사용하여 예측 모델을 생성했을 때보다 본 연구에서 제안한 방법론들을 적용했을 때 예측 모델에 대한 정확도가 향상됨을 알 수 있었다. 본 연구는 클릭스트림 분석을 통해 추출된 인터넷 사용자의 온라인 행위는 해당 사용자의 인구통계학적 정보 예측에 활용 가능하며, 예측된 익명의 인터넷 사용자들에 대한 인구통계학적 정보를 디지털 마케팅에 활용 할 수 있다는데 의의가 있다. 또한, 제안 방법론들을 통해 어느 종속변수에 대해 어떤 방법론들이 예측 모델의 정확도를 개선하는지 확인하였다. 이는 추후 클릭스트림 분석을 활용하여 인구통계학적 정보를 예측할 때, 본 연구에서 제안한 방법론을 사용하여 보다 높은 정확도를 가지는 예측 모델을 생성 할 수 있다는데 의의가 있다.

• 한국사회복지학
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• 제62권3호
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• pp.353-374
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• 2010

본 연구의 목적은 노인의 컴퓨터 이용과 사회활동참여 간의 관계를 규명하는 것이다. 구체적으로는 노인의 컴퓨터 이용실태 파악, 이용형태의 유형화를 거쳐, 컴퓨터 이용형태가 사회활동참여에 미치는 효과를 검토하고, 사회활동 종류별 분석을 통해 컴퓨터 이용이 갖는 사회적 속성을 파악하고자 하였다. 이를 위해"2009년 부산광역시 노인복지 실태 및 욕구조사"자료를 활용하였으며, 65~74세의 전기노인 1,464명을 연구대상으로 설정하였다. 연구 결과는 다음과 같다. 1) 컴퓨터 이용용도를 토대로, 노인 컴퓨터 이용자는 "정보탐색/취미형", "취미형", "정보탐색/의사소통형"의 3타입으로 유형화되었다. 2) 사회활동참여에 대한 노인의 컴퓨터 이용여부의 효과는 긍정적인 것으로 나타났다. 3) 컴퓨터 이용유형 가운데 "정보탐색/의사소통형"이 다른 유형에 비해 더 적극적으로 사회활동에 참여하는 것으로 나타났다. 4) 사회활동별 분석을 통해, 다른 유형에 비해 "정보탐색/의사소통형"은 사회적 관계망의 유지 및 확대를 지향하고, 조직적, 사회적 이익을 추구하려는 사회활동에 더욱 적극적으로 참여하는 것으로 나타났다. 본 연구의 결과는 노년기 컴퓨터 이용이 사회관계적 함의를 지니며, 궁극적으로는 사회활동참여를 통한 노년기 적응을 높이는데 일조할 수 있음을 시사한다.