• 디지털산업정보학회논문지
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• 제17권3호
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• pp.17-26
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• 2021

Internet of Things is an infrastructure of the interconnected devices. In Internet of Things environment, many smart devices are used in daily life. It requires a new retrieval method using multiple devices. We propose an information retrieval method using both device characteristics and device usage characteristics in multi-device environments. Firstly, information retrieval is performed using a general purpose device. And then, it is performed using dedicated devices. Our method uses both characteristics of the devices and usage characteristics of them. Moreover, it considers queries on the general purpose device. This paper proposes a new retrieval method and describes algorithms. Then, it presents smart home scenarios. Performance evaluation is performed using the scenarios. The evaluation results show higher precision and efficiency than previous researches. The proposed method gets information more accurately and quickly in IOT multiple device environments.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.739-742
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• 1997

A remote drum grappling device coupled to the anti-swing crane has been developed by KAERI to cope with problems involved in manually treating low level waste drums. In order for this grappling device to be operated effectively, multi-sensors including CCD camera were employed. As an activity representation scheme of the device, Extended State Machine (ESM) was used to descibe its operation sequences. The performance testing of the device was conducted successfully, and consequently its application could be extendable to industrial operation environment.

• 한국멀티미디어학회논문지
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• 제19권8호
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• pp.1479-1486
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• 2016

According to the advancement of display devices, the multi-screen contents display environment is growing to be accepted for the display exhibition area. The objectives of this research are to find communications technology and to design an editor interface of contents delivery system for the larger and adaptive multi-display workspaces. The proposed system can find existence of display devices and get information without any additional tools like marker, and can recognize device layout with only web-cam and image processing technology. The multi-display contents delivery system is composed of devices with three roles; display device, editor device, and fixed server. The editor device which has the role of main control uses UPnP technology to find existence and receive information of display devices. extract appointed color in captured picture using a tracking library to recognize the physical layout of display devices. After the device information and physical layout of display devices are connected, the content delivery system allows the display contents to be sent to the corresponding display devices through WebSocket technology. Also the experimental results show the possibility of our device connection and layout recognition techniques can be utilized for the large spaced and adaptive multi-display applications.

• 한국멀티미디어학회논문지
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• 제17권8호
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• pp.1033-1040
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• 2014

Recently, the concept of mobile content service has changed from providing unilaterally contents for single-device to providing same contents for multi-device. This service should be able to provide diverse contents for multi-devices without platform and specification of multi-device. In this study, we propose a bridge technique of heterogeneous smart platform supporting social immersive game. It is possible to access social immersive game by using a multi-platform bridge. To achieve this, we explain techniques of device connection and data transmission between heterogeneous devices using server-client structure and UPnP. It provides an immersive game environment for multi-user, which is able to play in a public place using big screen.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.529-531
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• 2022

연구개발특구진흥재단의 2021년 모바일 증강현실 시장 보고서에 따르면 스마트폰의 발전과 더불어 모바일 증강현실 시장의 성장으로 인해 최근 증강 현실 시장이 성장하고 있다. 증강현실 서비스를 모바일 사용자에게 제공하기 위해서는 기기별 네이티브 앱을 제작해야 한다. 하지만 이에는 멀티 플랫폼 대응에 소비되는 유지보수 비용과 앱 다운로드로 인한 낮은 접근성 등의 문제점이 존재한다. 최근에는 WebXR Device API를 활용하여 웹 환경에서 증강현실 시스템을 구축이 진행되는 추세이나, WebXR Device API를 사용한 시스템은 아직 연구단계에 있다고 판단된다. 본 논문에서는 WebXR Device API, Three JS, React를 이용하여 반응형 멀티 플랫폼 환경을 구축하여, 모바일 및 웹 사용자에게 증강현실 서비스를 제공하는 기능을 구현하였다. 실험 결과 반응형 웹 환경에서 증강현실의 연동을 성공적으로 구현되었음을 확인하였으며, 향후 웹 기반에서 동작되는 증강현실 서비스를 기대해본다.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제4권3호
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• pp.91-96
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• 2015

최근 IT 분야의 화두 중 하나는 '모빌리티(mobility)'이다. 이동성 및 가동성 등의 뜻을 가진 모빌리티는 사용자의 정보를 획득하여 사용자에게 서비스 이동의 자유로움을 제공할 수 있다는 의미이다. 본 논문에서는 모빌리티 환경에서 다양한 미디어를 다양한 디바이스로 이동할 수 있는 프로세스 오케스트레이션(MPO: Mobility Process Orchestration) 모델을 제안하고자 한다. 오케스트레이션 모델은 사용자 환경에 있는 디바이스를 오브젝트화하여 사용자에게 원하는 미디어를 원하는 디바이스에 MSMP(Multi Source Multi Platform)형태로 제공할 수 있는 구조와 기능을 제공한다. 이뿐만 아니라, 커리어그래피(Choreography)의 개념을 이용하여 다양한 미디어 형식에 맞는 디바이스만을 추출 및 오케스트레이션 하여 사용자에게 조화로운 서비스(Harmonizing Service)를 지향한다.

• 한국정보과학회논문지:정보통신
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• 제32권3호
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• pp.291-300
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• 2005

유비쿼터스 컴퓨터 환경은 사용자가 언제 어디서나 컴퓨터를 이용할 수 있도록 네트워크를 통해 상호 연결된 보이지 않는 수많은 컴퓨터(Invisible Computer)가 편재되고 사용자가 원하는 대로 쉽게 이용할 수 있는 컴퓨팅 환경을 지향하고 더 나아가서는 사용자가 원하는 컴퓨팅을 컴퓨터 스스로 알아서 (상황인식 Context Awareness) 제공하는 스마트 환경이다. 이러한 유비쿼터스 컴퓨팅은 보안에 있어 특히 취약한 면을 많이 내포하고 있다. 그 중에서도 분산된 다양한 컴퓨팅 기기들이 도처에 존재함으로 인해 사웅자 주턴에 있는 기기 중에서 사웅자 혹은 서버에 인증된 기기로의 위장공격 등이 가능해진다. 이에 본 논문에서는 다음과 같은 특징을 가지는 방식을 제안한다. 디바이스의 이동을 통한 인증 모델을 제시한다. 이는 개인의 작은 디바이스가 다른 사용자의 공간(MD: Multi Domain)로 이동하였을 경우 디바이스를 통한 인증을 실쳔하는 방식과 사용자 자신의 공간(SD: SinEle Domain)으로 이동하였을 경우 디바이스를 통한 인증을 실현하는 두 가지 방식을 제안한다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.370-373
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• 2006

Lastly, the problem of filling occurs in the process of concealed joint of adjacent components and was seen in joints between the structure and an electrical or mechanical device. Therefore, the dry processing which replaces wet joint was seen in joints between the structure and a door, ones between the structure and a finishing materials, ones between a gypsum board and electrical device, and ones between a water pipe and a tile finishing. And a process of separating the area of jointed parts in order to eliminate the problem of overlap was seen in joints between a door and a finishing material and ones between a gypsum board on the ceiling and a light. Lastly, an analysis of a process of exposing concealed parts indicated that the problem of filling could be applied to joints between the structure and an electrical or mechanical device and ones between a finishing material and a mechanical device. This study sought out methods to apply Environment Friendly Multi Housing Remodeling that allow easy remodeling as part of environment- preserving policies. It also contains basic data useful to implement long-life houses in the future by presenting a comprehensive design standard for them

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권4호
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• pp.58-66
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• 2020

Since the typical horn-type ultrasonic equipment induces a reaction at the probe tip, the sonochemical reaction has a limitation that it occurs only in a specific area. As one of the ways to overcome this limitation, an ultrasonic device with multi-stepped horn equipped with several oscillators has been developed. The objective of this study was to investigate the sonochemical effects induced by acoustic cavitation system in 20 kHz multi-stepped ultrasonic horn using calorimetry, KI dosimetry and the luminol test. The sonochemical effects of multi-stepped ultrasonic horn were compared with that of the typical horn-type 20 kHz ultrasonic device. The effect of immersion depth and power on the sonochemical reaction was investigated in the ultrasonic system with multi-stepped ultrasonic horn. Higher calorimetric energy was obtained at higher immersion depth and power conditions. Sonochemical effects increased significantly when using the high immersion depth and input power. However, as the input power increased, the cavitation reaction zone concentrated around the ultrasonic horn. Additionally, the experiments to examine the effect of liquid temperature was conducted. The smaller sonochemical reaction was obtained for the higher liquid temperature. The effect on temperature seems to be closely related to liquid conditions such as viscosity and vapor pressure of water.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 D
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• pp.2337-2340
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• 2002

This paper presents the method of AGV(Automatic guided vehicle)'s moving environment(plane, corner, edge) recognition using SONAR sensor configuration. As for the SONAR sensor, the Crosstalk effect has been generally considered as an inevitable noisy phenomenon in the indoor environment. However, this effect can be used as a clue for classifying and localizing targets in the indoor environment if those can be controlled and used well. EERUF(error eliminate rapid ultrasonic firing) is a method for firing multiple ultrasonic sensors in mobile robot application and multi-echo mode of POLARIOD Device can reduce the Crosstalk effect. Here, Crosstalk effect was reduced using EERUF and applied to the AGV with a simple wall-following algorithm in the indoor environment. This method was tesed by a typical AGV with multi SONAR sensors in the laboratory environment.