• 제목/요약/키워드: virtual Integration

검색결과 273건 처리시간 0.026초

3차원 공간 모형 데이터의 구축과 활용 (3D Spatial Data Model Design and Application)

  • 이준석
    • 한국측량학회지
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    • 제23권2호
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    • pp.109-116
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    • 2005
  • 3차원 공간 모형, 즉 3차원 CG 도시 모델은 건물이나 도로, 강 등의 사회 환경을 가상공간으로 표현하고 GIS(지리 정보 시스템)등의 정보 시스템에서 데이터를 축적${\cdot}$관리하여 광범위한 분야에서 다양한 활용이 기대되는 중요한 정보기반이다. 현재는 이러한 3차원 CG 도시 모델 구축을 위한 데이터 취득이나 모델 작성에는 많은 수작업이 필요하고 막대한 시간과 노력이 걸린다. 본 논문에서는 $\lceil$3차원 공간 데이터 기반$\rfloor$을 GIS와 CG로 통합화하고 자동 생성한 정보 시스템에 관하여 소개한다. 이 시스템에서는 GIS가 관리${\cdot}$축적한 수치지도상의 건물 경계선 다각형에 대하여 필터링, 다각형분할, 윤곽선의 생성 등의 처리를 하고 CG 시스템이 이것의 데이터를 받아서 지형의 도형 정보와 속성 정보를 설계하여 건물이나 도로 등의 3차원 CG 모델을 자동 생성한다.

지능형 디지탈홈을 위한 콤퍼짓 센서제어네트워크 및 테스트베드의 연구 (A Study of a Composite Sensor and Control Network and Its Test-bed for the Intelligent and Digital Home)

  • 이규호
    • 한국정보통신학회논문지
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    • 제11권9호
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    • pp.1687-1693
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    • 2007
  • 네트워크 기술이나 반도체 집적기술, 그리고 임베디드 시스템 기술의 발달로 넓은 범위의 영역에서 센서네트워크 활용이 가능해졌다. 따라서 센서 네트워크는 그것이 적용되는 응용분야에 따라서 여러 가지 형태와 차별화 된 특성으로 다양화되고 있다. 지능형 디지털 홈은 고유한 특성의 센서네트워크를 구성할 수 있는 한 분야이다. 본 논문에서는 컴퍼짓 센서 및 제어 네트워크를 제안하고, 이의 차세대 지능형 홈 네트워크 적용에 대해 논의한다. 또한 제안된 네트워크의 개발결과와 이를 기반으로 한 지능형 홈 서비스, 그리고 가상시험환경인 테스트베드의 개발결과를 제시한다.

Standard Terminology System Referenced by 3D Human Body Model

  • Choi, Byung-Kwan;Lim, Ji-Hye
    • Journal of information and communication convergence engineering
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    • 제17권2호
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    • pp.91-96
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    • 2019
  • In this study, a system to increase the expressiveness of existing standard terminology using three-dimensional (3D) data is designed. We analyze the existing medical terminology system by searching the reference literature and perform an expert group focus survey. A human body image is generated using a 3D modeling tool. Then, the anatomical position of the human body is mapped to the 3D coordinates' identification (ID) and metadata. We define the term to represent the 3D human body position in a total of 12 categories, including semantic terminology entity and semantic disorder. The Blender and 3ds Max programs are used to create the 3D model from medical imaging data. The generated 3D human body model is expressed by the ID of the coordinate type (x, y, and z axes) based on the anatomical position and mapped to the semantic entity including the meaning. We propose a system of standard terminology enabling integration and utilization of the 3D human body model, coordinates (ID), and metadata. In the future, through cooperation with the Electronic Health Record system, we will contribute to clinical research to generate higher-quality big data.

A Multi-level Perception Security Model Using Virtualization

  • Lou, Rui;Jiang, Liehui;Chang, Rui;Wang, Yisen
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제12권11호
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    • pp.5588-5613
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    • 2018
  • Virtualization technology has been widely applied in the area of computer security research that provides a new method for system protection. It has been a hotspot in system security research at present. Virtualization technology brings new risk as well as progress to computer operating system (OS). A multi-level perception security model using virtualization is proposed to deal with the problems of over-simplification of risk models, unreliable assumption of secure virtual machine monitor (VMM) and insufficient integration with virtualization technology in security design. Adopting the enhanced isolation mechanism of address space, the security perception units can be protected from risk environment. Based on parallel perceiving by the secure domain possessing with the same privilege level as VMM, a mechanism is established to ensure the security of VMM. In addition, a special pathway is set up to strengthen the ability of information interaction in the light of making reverse use of the method of covert channel. The evaluation results show that the proposed model is able to obtain the valuable risk information of system while ensuring the integrity of security perception units, and it can effectively identify the abnormal state of target system without significantly increasing the extra overhead.

A real-time unmeasured dynamic response prediction for nuclear facility pressure pipeline system

  • Seungin Oh ;Hyunwoo Baek ;Kang-Heon Lee ;Dae-Sic Jang;Jihyun Jun ;Jin-Gyun Kim
    • Nuclear Engineering and Technology
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    • 제55권7호
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    • pp.2642-2649
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    • 2023
  • A real-time unmeasured dynamic response prediction process for the nuclear power plant pressure pipeline is proposed and its performance is tested in the test-loop system (KAERI). The aim of the process is to predict unmeasurable or unreachable dynamic responses such as acceleration, velocity, and displacement by using a limited amount of directly measured physical responses. It is achieved by combining a well-constructed finite element model and robust inverse force identification algorithm. The pressure pipeline system is described by using the displacement-pressure vibro-acoustic formulation to consider fully filled liquid effect inside the pipeline structure. A robust multiphysics modal projection technique is employed for the real-time sensor synchronized prediction. The inverse force identification method is also derived and employed by using Bathe's time integration method to identify the full-field responses of the target system from the modal domain computation. To validate the performance of the proposed process, an experimental test is extensively performed on the nuclear power plant pressure pipeline test-loop under operation conditions. The results show that the proposed identification process could well estimate the unmeasured acceleration in both frequency and time domain faster than 32,768 samples per sec.

스마트 웨어하우스 공급망 관리를 위한 블록체인과 Digital Twin의 통합 (Integrating Blockchain and Digital Twin for Smart Warehouse Supply Chain Management)

  • 커 라타낙;무함마드 피다우스;이경현
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2023년도 춘계학술발표대회
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    • pp.273-276
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    • 2023
  • This paper presents the integration of Digital twin and Blockchain-based Supply Chain Management (DB-SCM) in a smart warehouse to create a more efficient, secure, and transparent facility. The process involves creating a digital twin of the warehouse using sensors and IoT devices and then integrating it with a blockchain-based supply chain management system to connect all stakeholders. All data are collected and tracked in real-time as goods move through the warehouse, and smart contracts are automatically executed to ensure accountability for all parties involved. The study also highlights the critical role of effective supply chain management in modern business operations and the significance of smart warehouses, which leverage advanced technologies such as robotics, AI, and data analytics to optimize warehouse operations. Later, we discuss the importance of digital twins, which allow for creating a virtual representation of a physical object or system, and their potential to revolutionize a wide range of industries. Therefore, DB-SCM offers numerous benefits, including enhanced efficiency, improved customer satisfaction, and increased sustainability, and provides a valuable case study for organizations seeking to optimize their supply chain operations.

Evaluating Conversational AI Systems for Responsible Integration in Education: A Comprehensive Framework

  • Utkarch Mittal;Namjae Cho;Giseob Yu
    • Journal of Information Technology Applications and Management
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    • 제31권3호
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    • pp.149-163
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    • 2024
  • As conversational AI systems such as ChatGPT have become more advanced, researchers are exploring ways to use them in education. However, we need effective ways to evaluate these systems before allowing them to help teach students. This study proposes a detailed framework for testing conversational AI across three important criteria as follow. First, specialized benchmarks that measure skills include giving clear explanations, adapting to context during long dialogues, and maintaining a consistent teaching personality. Second, adaptive standards check whether the systems meet the ethical requirements of privacy, fairness, and transparency. These standards are regularly updated to match societal expectations. Lastly, evaluations were conducted from three perspectives: technical accuracy on test datasets, performance during simulations with groups of virtual students, and feedback from real students and teachers using the system. This framework provides a robust methodology for identifying strengths and weaknesses of conversational AI before its deployment in schools. It emphasizes assessments tailored to the critical qualities of dialogic intelligence, user-centric metrics capturing real-world impact, and ethical alignment through participatory design. Responsible innovation by AI assistants requires evidence that they can enhance accessible, engaging, and personalized education without disrupting teaching effectiveness or student agency.

유비쿼터스 컴퓨팅 환경을 위한 RFID/WSN 통합 관리 시스템에 관한 연구 (A Study on The RFID/WSN Integrated system for Ubiquitous Computing Environment)

  • 박용민;이준혁
    • 대한전자공학회논문지TC
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    • 제49권1호
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    • pp.31-46
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    • 2012
  • 유비쿼터스 컴퓨팅 환경을 구현하기 위해서 가장 핵심이 되는 기술은 USN(Ubiquitous Sensor Network)기술로써 RFID(Radio Frequency Identification)와 무선 센서 네트워크(Wireless Sensor Network WSN)를 이용한 다양한 센서 기술과 프로세서 집적 기술 그리고 무선 네트워크 기술을 이용해서 실제 물리적 환경 정보를 원격에서 손쉽게 수집하고 모니터링 하는 것을 가능하게 함으로써 기존 가상 공간의 IT 기술을 다양한 실제 환경에서 확대할 수 있도록 한다. 그러나 RFID와 WSN은 이러한 기술적 유사성과 상호 영향에도 불구하고 별 개의 연구로 인식되었으며 RFID와 WSN의 기술적인 융합에 대한 연구는 미비한 수준이다. 이러한 문제점을 인식한 EPCglobal에서는 국제 표준인 EPCglobal Network를 기반으로 RFID와 WSN 기술을 효율적으로 통합/연동할 수 있는 EPC 센서 네트워크(EPC Sensor Network)를 제안하였다. 제안된 EPC 센서 네트워크는 미들웨어에서 복합 이벤트 처리(Complex Event Processing) 기법을 이용하여 RFID와 WSN을 통해 발생되는 데이터를 단일 환경에서 통합하고, 발생된 이벤트를 EPCglobal Network를 기반으로 연동하는 기술이다. 하지만 이러한 EPC 센서 네트워크는 미들웨어에서 복합 이벤트를 검출하기 위해 복합 이벤트를 구성하는 모든 기본 이벤트가 발생하지 못하는 경우에도 계속적인 검사를 수행하기 때문에 연산 비용이 증가되는 문제점이 있다. 또한 센서 데이터의 표현을 위해 RFID 태그의 EPC를 기반으로 센서 데이터를 하나의 결합된 쌍으로 표현한다. 이것은 센서 데이터를 처리하는데 있어 반드시 EPC가 있어야 함을 의미한다. 즉, 센서 데이터만을 위한 관리 기능은 제공하지 못하는 문제점이 있다. 이러한 EPC 센서 네트워크의 문제점들을 해결하기 위하여 본 논문에서는 RFID/WSN 통합 관리 시스템을 제안한다. 제안하는 RFID/WSN 통합 관리 시스템은 첫 번째, RFID와 WSN 데이터를 인터넷 표준 프로토콜인 SIP(Session Initiation Protocol) 기반의 통합 관리 시스템을 제안하였다. 두 번째, 미들웨어에서 불필요한 복합 이벤트 검출 연산을 위하여 복합 이벤트의 최소 조건을 정의하고 조건을 만족하는 경우에만 복합 이벤트를 검출하는 알고리즘을 제안하였다. 제안하는 기법들의 성능을 평가하기 위하여 SIP 기반의 통합관리시스템을 구현하여 성능을 평가하였다.

다차원기반 고정밀 공간영상정보 시스템 구축에 관한 연구 (Developing A Multi-dimensional Spatio-visual Information System)

  • 김미연;여욱현;최진원
    • 한국측량학회지
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    • 제27권6호
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    • pp.649-658
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    • 2009
  • 최근 지능형 미래의 도시공간구축을 위해 유비쿼터스 개념을 적용한 u-City, u-Ecocity 등의 새로운 도시계획의 패러다임의 등장은 도시영역에 대한 고품질의 3차원 공간정보를 필요로 하고 있다. 최신 GIS응용 기술을 기반으로 하여 3차원으로 모델링된 도시 규모의 방대한 영역에 대한 다양한 형식의 공간정보를 통합하여 가시화 및 공간정보 검색 및 분석, 평가를 위한 솔루션을 포함하는 다차원 공간영상정보 시스템을 구축하고자 하는 것이 목적이다. 기존의 3차원 도시모델링의 한계를 극복하기 위한 방안으로 항공 라이다(LiDAR) 데이터를 이용하여 실사용자들의 요구사항을 충분히 반영할 수 있도록 시스템의 활용도를 높여 도시 시설물의 고품질, 고해상도의 현실감있는 3차원 가상 도시환경 구축을 목표로 공간정보의 통합, 가시화, 활용기능 생성을 연구의 범위로 한다. 속성 및 기호로 구성된 표준형식의 공간정보에 위성영상 및 항공사진을 매쉬업하여 실제 세계와 최대한 흡사한 가상의 도시환경을 재현하여 조망 및 일조권 분석은 물론 도시의 각종 행정업무 및 의사결정을 지원할 수 있는 분석기능과 활용기능을 제공할 수 있도록 구축한다.

The Dynamics of Noise and Vibration Engineering Vibrant as ever, for years to come

  • Leuridan, Jan
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2010년도 춘계학술대회 논문집
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    • pp.47-47
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    • 2010
  • Over the past 20 years, constant progress in noise and vibration (NVH) engineering has enabled to constantly advance quality and comfort of operation and use of really any products - from automobiles to aircraft, to all kinds of industrial vehicles and machines - to the extend that for many products, supreme NVH performance has becomes part of its brand image in the market. At the same time, the product innovation agenda in the automotive, aircraft and really many other industries, has been extended very much in recent years by meeting ever more strict environmental regulations. Like in the automotive industry, the drive towards meeting emission and CO2 targets leads to very much accelerated adoption of new powertrain concepts (downsizing of ICE, hybrid-electrical...), and to new vehicle architectures and the application of new materials to reduce weight, which bring new challenges for not only maintaining but further improving NVH performance. This drives for innovation in NVH engineering, so as to succeed in meeting a product brand performance for NVH, while as the same time satisfying eco-constraints. Product innovation has also become increasingly dependent on the adoption of electronics and software, which drives for new solutions for NVH engineering that can be applied for NVH performance optimization of mechatronic products. Finally, relentless pressure to shorten time to market while maintaining overall product quality and reliability, mandates that the practice and solutions for NVH engineering can be optimally applied in all phases of product development. The presentation will first review the afore trends for product and process innovation, and discuss the challenges they represent for NVH engineering. Next, the presentation discusses new solutions for NVH engineering of products, so as to meet target brand values, while at the same time meeting ever more strict eco constraints, and this within a context of increasing adoption of electronics and controls to drive product innovation. NVH being very much defined by system level performance, these solutions implement the approach of "Model Based System Engineering" to increase the impact of system level analysis for NVH in all phases of product development: - At the Concept Phase, to be able to do business case analysis of new product concepts; to arrive at an optimized and robust product architecture (e.g. to hybrid powertrain lay-out, to optimize fuel economy); to enable target cascading, to subsystem and component level. - In Development Phase, to increase realism and productivity of simulation, so as to frontload virtual validation of components and subsystems and to further reduce reliance on physical testing. - During the final System Testing Phase, to enable subsystem testing by a combination of physical testing and simulation: using simulation models to simulate the final integration context when testing a subsystem, enabling to frontload subsystem testing before final system integration is possible. - To interconnect Mechanical, Electronical and Controls engineering, in all phases of development, by supporting model driven controls engineering (MIL, SIL, HIL). Finally, the presentation reviews examples of how LMS is implementing such new applications for NVH engineering with lead customers in Europe, Asia and US, with demonstrated benefits both in terms of shortening development cycles, and/or enabling a simulation based approach to reduce reliance on physical testing.

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