• 제목/요약/키워드: Cloud modeling

검색결과 264건 처리시간 0.023초

토픽모델링과 시계열 분석을 활용한 클라우드 보안 분야 연구 동향 분석 : NTIS 과제를 중심으로 (Analysis of Research Trends in Cloud Security Using Topic Modeling and Time-Series Analysis: Focusing on NTIS Projects)

  • 윤선영;조남옥
    • 융합보안논문지
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    • 제24권2호
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    • pp.31-38
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    • 2024
  • 최근 클라우드 서비스 사용이 확산하면서 클라우드 보안의 중요성이 증가하였다. 본 연구의 목적은 클라우드 보안 분야의 최근 연구 동향을 분석하고 시사점을 도출하는 것이다. 이를 위해 2010년부터 2023년까지 국가과학기술지식정보서비스(NTIS)에서 제공하는 R&D 과제 데이터를 활용하여 클라우드 보안 연구 동향을 분석하였다. LDA 토픽모델링과 ARIMA 시계열 분석을 통해 클라우드 보안 연구의 핵심 토픽 15개를 도출하였으며, AI를 활용한 보안 기술, 개인정보 및 데이터보안, IoT 환경에서의 보안 문제 해결이 연구에서 중요한 영역임을 확인했다. 이는 클라우드 기술의 확산과 기반 시설의 디지털 전환으로 인해 발생할 수 있는 보안 위협에 대응하기 위해 관련 연구가 필요함을 시사한다. 도출된 토픽들을 기반으로 클라우드 보안 분야를 네 가지 범주로 나누어 기술참조모델을 정의하였으며, 전문가 인터뷰를 통해 해당 기술참조모델을 개선하였다. 본 연구는 클라우드 보안 발전의 방향을 제시하며 학계 및 산업계에 미래 연구와 투자에 대한 중요한 지침을 제공할 것으로 기대된다.

클라우드 컴퓨팅에 대한 조직 행동의 이해: 조직의 클라우드 컴퓨팅 구현과정에 영향을 미치는 요소와 변혁적 리더쉽의 조절효과 (Understanding Organizational Behavior regarding Cloud Computing: Determinants Impacting on the Implementation Process of Cloud Computing and the Moderating Effect of Evolutional Leadership)

  • 김상현;김근아
    • 한국정보시스템학회지:정보시스템연구
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    • 제25권4호
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    • pp.37-61
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    • 2016
  • Purpose This study examines firms at various industries to identify key organizational characteristics that positively drive the evaluation of cloud computing. In addition, this study tests the impact of one's evaluation has on the adoption and integration of cloud computing within their respective firm. Design/methodology/approach A total of 172 responses from various firms currently using cloud computing service were analyzed using the structural equation modeling(SEM). Findings Results show that organizational Needs(Mobility and Job Relevance), Perceived Factors(Relative Advantages and Cost Savings), and Organizational Readiness(Technical Knowledge, Financial Supports, and Managerial Supports) have a significant impact on cloud computing evaluation; and evaluation influences its adoption, and integration. However, two variables(IT Performance Gaps and Compatibility) have no significant impact on cloud computing evaluation. Finally, Evolutional Leadership has a significant moderating effect within the relationship among variables in the process of cloud computing implementation.

A new approach for modeling pulse height spectra of gamma-ray detectors from passing radioactive cloud in a case of NPP accident

  • R.I. Bakin;A.A. Kiselev;E.A. Ilichev;A.M. Shvedov
    • Nuclear Engineering and Technology
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    • 제54권12호
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    • pp.4715-4721
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    • 2022
  • A comprehensive approach for modeling the pulse height spectra of gamma-ray detectors from passing radioactive cloud in a case of accident at NPP has been developed. It involves modeling the transport of radionuclides in the atmosphere using Lagrangian stochastic model, WRF meteorological processor with an ARW core and GFS data to obtain spatial distribution of radionuclides in the air at a given moment of time. Applying representation of the cloud as superposition of elementary sources of gamma radiation the pulse height spectra are calculated based on data on flux density from point isotropic sources and detector response function. The proposed approach allows us to obtain time-dependent spectra for any complex radionuclide composition of the release. The results of modeling the pulse height spectra of the scintillator detector NaI(Tl) Ø63×63 mm for a hypothetical severe accident at a NPP are presented.

모바일 클라우드 컴퓨팅의 작업 실행 시간에 대한 연구 (Study on the Job Execution Time of Mobile Cloud Computing)

  • 정성민;김태경
    • 디지털산업정보학회논문지
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    • 제8권1호
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    • pp.99-105
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    • 2012
  • Given the numbers of smartphones, tablets and other mobile devices shipped every day, more and more users are relying on the cloud as the main driver for satisfying their computing needs, whether it is data storage, applications or infrastructure. Mobile cloud computing is simply cloud computing in which at least some of the devices involved are mobile. Each node is owned by a different user and is likely to be mobile. Using mobile hardware for cloud computing has advantages over using traditional hardware. These advantage include computational access to multimedia and sensor data without the need for large network transfer, more efficient access to data stored on other mobile devices and distributed ownership and maintenance of hardware. It is important to predict job execution time in mobile cloud computing because there are many mobile nodes with different capabilities. This paper analyzes the job execution time for mobile cloud computing in terms of network environment and heterogeneous mobile nodes using a mathematical model.

항만 BIM 플랫폼의 클라우드 서비스를 위한 IaaS+PaaS 통합 환경 개발 (Development of an Integrated IaaS+PaaS Environment for Providing Cloud Computing Service in a BIM Platform for Harbor Facilities)

  • 문현석;현근주;김원식
    • 한국BIM학회 논문집
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    • 제9권4호
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    • pp.62-74
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    • 2019
  • Because the existing BIM platform is based on user services, the focus is on the development of SaaS (Software as a Service), which provides business services online. However, since a harbor is a security facility, the harbor BIM platform is preferably provided in a private form, rather than relying on the infrastructure environment provided by external cloud providers. Therefore, this study analyzes and reviews the main functions to be provided as SaaS services of the harbor BIM platform. The goal is to build a cloud-based harbor BIM platform that can provide this service to users. To this end, we built IaaS (Infrastructure as a Service) environment of the harbor BIM platform based on the open source Open Stack and integrate and develop PaaS environment with Open Shift applied with IaaS. We applied the GPU to the harbor BIM platform to verify the performance of the harbor BIM platform, and found that the rendering and loading times are improved. In particular, it is expected to reduce the cost of introduction and provide it as the basic cloud environment of similar BIM platform for infrastructure facilities.

토픽모델링과 에고 네트워크 분석을 활용한 스마트 헬스케어 연구동향 분석 (Research Trend Analysis on Smart healthcare by using Topic Modeling and Ego Network Analysis)

  • 윤지은;서창진
    • 디지털콘텐츠학회 논문지
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    • 제19권5호
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    • pp.981-993
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    • 2018
  • 스마트 헬스케어는 ICT 분야와 의료서비스 분야가 융 복합 된 분야로 다양한 분야에서 학제 간 융 복합 연구가 활발히 이루어지고 있다. 본 연구는 토픽모델링(Topic Modeling)과 에고 네트워크 분석(Ego Network Analysis)을 활용하여 스마트 헬스케어 연구동향을 살피는데 그 목적이 있다. 이를 위해 2001년부터 2018년 4월까지 Scopus에 게재된 2,690편을 대상으로 텍스트 분석, 각 기간별 빈도분석, 토픽모델링, 워드 클라우드, 에고 네트워크 분석을 수행하였다. 토픽 모델링 분석 결과 8개의 주요 연구토픽이 도출되었다. 8개 주요 연구토픽은 "AI in healthcare", " Smart hospital", "Healthcare platform", " blockchain in healthcare", "Smart health data", "Mobile healthcare", "Wellness care", "Cognitive healthcare" 순으로 나타났다. 토픽모델링 결과를 보다 심도 있게 살펴보기 위해 연구토픽별 에고 네트워크 분석을 하였다. 이를 통해 스마트 헬스케어 연구동향을 파악하고, 향후 연구의 방향성을 수립하는데 시사점을 제시하고자 한다.

Analysis of Laughter Therapy Trend Using Text Network Analysis and Topic Modeling

  • LEE, Do-Young
    • 웰빙융합연구
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    • 제5권4호
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    • pp.33-37
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    • 2022
  • Purpose: This study aims to understand the trend and central concept of domestic researches on laughter therapy. For the analysis, this study used total 72 theses verified by inputting the keyword 'laughter therapy' from 2007 to 2021. Research design, data and methodology: This study performed the development and analysis of keyword co-occurrence network, analyzed the types of researches through topic modeling, and verified the visualized word cloud and sociogram. The keyword data that was cleaned through preprocessing, was analyzed in the method of centrality analysis and topic modeling through the 1-mode matrix conversion process by using the NetMiner (version 4.4) Program. Results: The keywords that most appeared for last 14 years were laughter therapy, depression, the elderly, and stress. The five topics analyzed in thesis data from 2007 to 2021 were therapy, cognitive behavior, quality of life, stress, and the elderly. Conclusions: This study understood the flow and trend of research topics of domestic laughter therapy for last 14 years, and there should be continuous researches on laughter therapy, which reflects the flow of time in the future.

맞춤형 클라우드 BIM 서비스 요구기능 도출에 관한 연구 - 의료시설 설계를 중심으로 - (A Study on Demand Function of Customized Cloud BIM Service - Focused on Medical Facility Design -)

  • 정성호;이병수;최윤기
    • 대한건축학회논문집:계획계
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    • 제35권7호
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    • pp.53-61
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    • 2019
  • Cloud BIM, which incorporates cloud computing technology and BIM technology, is increasingly used in construction. In particular, the recent trend of cloud services in IT field is to provide customized cloud services according to the characteristics of users. These changes are also linked to the cloud BIM, which is emerging in the construction industry. However, cloud BIM researches and commercial technologies that are currently underway do not reflect these trends, and they provide services through generalized management functions in construction projects. In order to solve these problems, a new type of customized cloud BIM service is needed that can provide cloud services by reflecting the characteristics of the project, customization based on the user's work, and providing the knowledge service. Therefore, this study aims to derive the system requirement function that should be preceded for implementing the customized cloud BIM service, and the target project is selected as the medical facility.

보안요인을 중심으로 한 개인용 클라우드 서비스 사용의도 (Intention to Use of Personal Cloud Services: Focusing on the Security Factors)

  • 이재석;김경재
    • 지식경영연구
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    • 제18권4호
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    • pp.237-260
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    • 2017
  • Recently, with the proliferation of smart phones and mobile devices and the increase in the speed of mobile Internet, IT services are increasingly used in smart phones and mobile devices in a different way from the past. That is, a cloud service that downloads and uses data stored in the server in real time is expanding, and as a result, the security due to the continuous Internet connection of the user becomes a problem. In this study, we analyzed the relationship between factors affecting the continuous use of personal cloud service by using technology acceptance model. In addition to the technology acceptance model, confidentiality, privacy, accessibility, innovation, and self-efficacy were extracted from the existing research with emphasis on the characteristics of the cloud service and security factors. Moreover, the difference of intention to use among genders was verified through structural equation modeling with survey data from 262 personal cloud service users.

SIMULATION OF CLOUD'S VISIBLE REFLECTION USING MODIS CLOUD PRODUCTS

  • Ham, Seung-Hee;Sohn, Byung-Ju
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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    • pp.668-671
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    • 2006
  • Radiative transfer modeling of ice clouds is developed. Ice clouds located near tropopause reflect most of sunlight, thus atmospheric and surface effects can be minimized. Cloud properties such as cloud optical thickness (COT) and effective radius are important parameters to determine the magnitude of reflectance, while atmospheric and surface parameters rarely affect reflectance value. For selected homogeneous cloud pixels of MODerate Resolution Imaging Spectroradiometer (MODIS) observation, reflectances are calculated using MODIS cloud products as inputs of radiative transfer model (RTM). For three types of phase function (Henyey-Greenstein, Garcia-Siewert, Baum) calculated reflectances are compared with observations for validation. All cases show linear relationship between simulated values and measured values, however each represent different bias and slope. The result shows that phase function determine angular distribution of reflectance.

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