• 사물인터넷융복합논문지
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• 제9권1호
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• pp.71-76
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• 2023

최근 빅데이터를 저장 및 관리하기 위해 대용량 데이터를 안정적으로 접근할 수 있는 고성능의 저장시스템 개발과 연구가 활발하게 진행되고 있다. 특히 데이터센터 및 엔터프라이즈 환경의 저장시스템에서는 대용량의 데이터를 관리하기 위해 대용량의 SSD(solid state disk)가 대량으로 사용되고 있다. 일반적으로 SSD는 미디어인 NAND 플래시 메모리의 특성을 감추고 데이터를 관리를 효율적으로 하기 위해 FTL(flash transfer layer)을 사용한다. 그러나 FTL의 알고리즘은 SSD의 용량이 커질수록 데이터가 저장된 NAND의 위치 정보를 관리하기 위해 DRAM을 많이 사용하는 한계가 있다. 따라서 본 논문에서는 FTL에서 사용하는 DRAM 자원을 줄이기 위한 가상 메모리 (virtual memory)를 적용한 FTL 정책을 소개한다. 본 논문에서 제안하는 가상 메모리 기반 FTL 정책은 LRU(least recently used) 정책을 사용하여 최근 사용된 데이터의 멥핑 정보를 DRAM 공간에 적재하고 이전에 사용된 정보는 NAND에 저장하는 방식으로 멥 데이터를 관리한다. 마지막으로 실험을 통해 가상 메모리 기반의 FTL과 일반 FTL의 데이터 쓰기 처리를 하는 동안 소모되는 성능과 자원의 사용량을 측정하고 분석한다.

• 반도체디스플레이기술학회지
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• 제15권2호
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• pp.66-69
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• 2016

Recently, augmented reality and virtual reality in the ICT sector have been highlighted. So also interested in related HMD areas to facilitate contact with the VR content is being attend. This paper proposes a method for implementing to the virtual reality through the mobile HMD device with the real time 360 image. This system is required the real time 360 image streaming server configuration and image processing for augmented reality and virtual reality. The configuration of the streaming server is configured the DB server to store images and the relay server that can relay images to other devices. Augmented image processing module is composed based on markerless tracking, and there are four modules that are recognition, tracking, detecting and learning module. Also, the purpose of this paper is shown the augmented 360 image processing through the Mobile HMD.

• 한국의류산업학회지
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• 제21권4호
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• pp.401-411
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• 2019

Non-contact judgment and evaluation for products are increasingly needed along with a rapid environmental change in fashion that sows urgency in the need to implement services that allows users to judge and experience a tactile sense in a fashion product without actual contact. Technological development is required to provide users with syn-aesthetic experiences that integrate the visual, tactile and the auditory. There is also a need to conduct research to increase immersion that provides users with ICT-related experiences communicated through fashion images. The study analyzed demands for haptic communication technology by Korean users in immersive VR fashion product shopping. Accordingly, it defined haptic communication through literature research, investigated immersion in the VR environment and conducted in-depth interviews for haptic communication applicable to VR shopping. Findings show that hedonic reactions by fantasy, emotion and fun function are an important motive in selecting VR shopping. VR fashion product shopping steps were divided into 4: move to store, search in store, search of product and purchase based on offline store shopping experience. It defined the haptic communication by steps and analyzed the types of the haptic feedback to be implemented. The study results provide basic data for developing haptic communication technology that can enhance e a sense of the presence and immersion experiences that can help lay a groundwork for pilot studies on the convergence of the virtual and the real.

• 공학교육연구
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• 제2권1호
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• pp.51-58
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• 1999

본 연구는 가상 현실(virtual reality)을 활용하여 실제 고가의 실험장비를 구입하지 않고도 개인용 컴퓨터에서 인터넷상으로 가상적인 프레스를 이용한 압축실험을 할 수 있도록 하는 것이다. 가상압축실험의 구현은 인터넷을 통하여 세 개의 모듈 즉 입력, 계산, 결과로 나누어 계산되어진다. 입력모듈에서는 압축실험을 위하여 인터넷 사용자가 재료의 실험적인 특징을 입력하고 그 입력 값을 서버 컴퓨터로 보내주는 과정이며, 계산모듈은 서버 컴퓨터에 있는 시뮬레이션 해석프로그램을 이용하여 입력모듈의 입력 값을 받아들여 결과를 계산한 후 파일로 저장하는 과정이다. 결과모듈에서는 서버 컴퓨터에서 계산된 결과를 인터넷 사용자에게 도표와 그림 그리고 3차원 애니메이션을 보여주는 과정으로 되어있다. 이를 구현하기 위하여 인터넷의 언어인 HTML, CGI, VRML, JAVA를 사용하였으며, 유한요소법(FEM)을 이용한 해석프로그램은 포트란(Fortran) 언어로 제작되었다. 현재 인터넷상에서의 가상현실을 이용한 응용분야가 급속히 확대되므로 앞으로 공학적인 가상 실험에 관한 연구가 많이 이루어져 실제 실험을 대체할 것이다.

• 시스템엔지니어링학술지
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• 제15권2호
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• pp.66-71
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• 2019

In digital pathology, an electronic system in the biomedical domain storage of the files is a big constrain and because all the analysis and annotation takes place at every user-end manually, it becomes even harder to manage the data that is being shared inside an enterprise. Therefore, we need such a storage system which is not only big enough to store all the data but also manage it and making communication of that data much easier without losing its true from. A virtual server setup is one of those techniques which can solve this issue. We set a main server which is the main storage for all the virtual machines(that are being used at user-end) and that main server is controlled through a hypervisor so that if we want to make changes in storage overall or the main server in itself, it could be reached remotely from anywhere by just using the server's IP address. The server in our case includes XML-RPC based API which are transmitted between computers using HTTP protocol. JAVA API connects to HTTP/HTTPS protocol through JAVA Runtime Environment and exists on top of other SDK web services for the productivity boost of the running application. To manage the server easily, we use Tkinter library to develop the GUI and pmw magawidgets library which is also utilized through Tkinter. For managing, monitoring and performing operations on virtual machines, we use Python binding to XML-RPC based API. After all these settings, we approach to make the system user friendly by making GUI of the main server. Using that GUI, user can perform administrative functions like restart, suspend or resume a virtual machine. They can also logon to the slave host of the pool in case of emergency and if needed, they can also filter virtual machine by the host. Network monitoring can be performed on multiple virtual machines at same time in order to detect any loss of network connectivity.

• 한국실내디자인학회논문집
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• 제26권1호
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• pp.33-42
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• 2017

Interior design especially the design developments for commercial spaces should ensure the economy of spaces. This is the marketing for space. It is necessary to understand the design elements of commercial space for the efficient using of digital media of space marketing. In this research decided to design application schemes for shopping mall by searching fashion shopping behaviors of users with persona-base scenario approach. Collected the information of users behavior base on case analysis of advance research to make personas. And develop scenario base personas for knowing the needs of users. And then made 4 schemes as the solution. Scheme 1. Customers can get the information and communication with the staff through with media screen in one room of shopping mall. The data of customers can be recorded for providing information or product recommendation personality. Forecast to preferred by group trip or customers that don't like walking around in shopping mall. Scheme 2. Install a media screen at entrance of a store in shopping mall and show special effect to raise customers' attention who walk through from the front of the store. Through with this customers will stay for long time and raise curiosity to get in the store. And the media screen also provide information of store and products. Scheme 3. Customers can get the information of products with using smart phone to scan QR cord in labels of products and record. Customers can finish whole shopping behaviors without the help of store staff. And can make buying decision even have left shopping mall as a online mode. Scheme 4. Store managers can record the products and the environment of store with 360 camera and update to website. Then customers can browse the virtual space with VR glasses. That make customers can have the real shopping experience without being in the store. In this study, have presented schemes of digital media in commercial space. But there are various of commercial space. In this study was presented schemes for shopping mall by searching fashion shopping behaviors of users. And look forward the researches about specific space setting and other type of commercial space for space development.

• 감성과학
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• 제26권2호
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• pp.53-66
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• 2023

최근 패션 브랜드들이 사용자들의 능동적 참여가 가능한 메타버스 플랫폼을 자사의 브랜드 접점으로 활용하기 위한 방안을 모색하고 있다. 이에 본 연구에서는 메타버스와 오프라인 스토어에서의 브랜드 체험을 비교하고자 한다. 패션 브랜드 젠틀몬스터의 오프라인 스토어과 이를 메타버스 공간에 그대로 재현한 제페토(ZEPETO) 스토어의 브랜드 체험을 비교하였다. 실험 참가자 집단을 메타버스 스토어 체험이 선행된 집단과 오프라인 스토어 체험이 선행된 집단으로 구분하여 현장 조사를 진행하였다. 그 결과, 다음과 같은 주요 연구결과를 도출할 수 있었다: (1) 전체 체험 반응에서 감성 보다는 새로운 정보에 반응하는 감각 체험이 주를 이루었다; (2) 메타버스보다는 제품을 직접 만지고 체험할 수 있는 오프라인 스토어에서 체험이 더욱 활발하게 이루어졌다; (3) 네 가지의 테마공간 유형 중에서는 제품 공간에서 가장 많은 체험 반응이 나타났다; (4) 오프라인 스토어 체험이 선행된 두 번째 그룹보다 메타버스 스토어 체험이 선행된 첫 번째 그룹에서 보다 활발한 체험 반응이 일어났다. 마지막으로 본 연구결과를 통해 가상공간에서의 메타버스 브랜드 스토어가 현실 공간의 시공간적 제약을 뛰어넘은 차별화된 경험을 제공할 뿐만 아니라, 오프라인 스토어의 경험을 더욱 의미 있고 풍부하게 만들어 주는 전략적 도구로 활용될 수 있음을 알 수 있었다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2000년도 추계종합학술대회
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• pp.364-367
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• 2000

As computer system and information/communication technology develop rapidly, nowadays CSCW(Computer Supported Collaborative Work) system appears, through which it is available to work on virtual space without any restriction of time and place. Most of Un systems depend on a special network and groupware. The systems of graphics and CAD are not so many because they are characterized by Hardware and application software. In this paper, we propose a web-based collaborative CAD system which can be jointly worked on Internet WWW being independent from any platforms. It can generate and handle objects easily using lava 3D, and it can transmit, print, and store them. The interactive work for designing objects can be also carried out through dialling with each other. This system is executed in the environment of Client/server. Clients connect to the server through lava applet on WWW. The server is implemented by lava application, and it consists of three components : connection manager which controls the contact to users, work manager which keeps viewing in concurrency and provides virtual work space sharing with others, and solid modeler which generates 3D object.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.649-654
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• 2009

In this paper, we propose "InFra-VC", an interactive Fractal viewer on virtual reality system. Fractal impresses us very much and is expected to model some natural phenomenon effectively. Therefore, their visualization is necessary for us to study their beauty as well as structure. InFra-VC can represents a cutting plane of the fractal figure, so that the user can see and enjoy its internal structure. Moving position of the cutting surface, we can easily understand its internal structure. Additionally, InFra-VC can store situation as VRML format file at any time. This feature enables us to see the structure by a VRML viewer on common PC.

• 대한안전경영과학회지
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• 제1권1호
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• pp.207-216
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• 1999

Too many big accidents have been occurring in Korea during '90. Those were accidents of Sung-Soo Bridge in 1994 and Sam-Poong Department Store in 1995. It was confirmed that the causes of the accident were unreliable construction or building. Therefore, in this study are to use technique of virtual reality(VR) simulation in order to prevent construction accidents. To set up the VR in safety construction, Date Base of variables, VR model and expert system are needed. This system is to build expert system, to visualize of the VR system and navigation, and to find out design errors of construction. Therefore, the purpose of this was to analyze accident type of construction, and apply VR system for simulation technique.