• Korean Journal of Computational Design and Engineering
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• v.8 no.2
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• pp.75-83
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• 2003

In this paper, OSP(Octal Space Partitioning) tree is proposed for the real time culling of infinite sets of geometries in interactive Virtual Environment applications. And MSVBSP(Modified Shadow Volume BSP) tree is suggested for the occlusion culling. Experimental results show that the OSP and MSVBSP tree are efficiently implemented in real time rendering of interactive geometries.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.234-235
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• 2012

본 논문에서는 모바일 단말에 최적화원 VM(Virtual Machine)인 경량화된 PVI(Private Virtual Instance)를 프로비저닝하여 가상단발상의 Rich 앱에 고성능 컴퓨팅, 스토리지, 네트워크를 제공하고 모바일 클라우드 서비스를 위한 개방형 개발 환경 및 서비스 환경을 제공하는 새로운 모바일 클라우드 모델을 제안한다.

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.175.2-175.2
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• 2003

Inhibition of the protein-modifying enzyme farnesyltransferase is considered as a major emerging strategy in cancer therapy because of the involvement of farnesylated proteins in oncogensis. We studied the structure-activity relationship of a novel class of CAAX-peptidomimetic farnesyltransferase inhibitors based on the benzophenone scaffold. FlexX docking of inhibitors confirmed reasonable fit of the molecule into the peptide binding site of farnesyltransferase. We also performed a virtual screening with LeadQuest chemical library databases to idenfity novel inhibitors of farnesyltransferase. (omitted)

• Proceedings of the KWS Conference
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• 1998.10a
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• pp.3-8
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• 1998

This paper considers factory simulation based on shipbuilding CIM in which a computer integrated design and manufacturing system is considered. The author proposes the product model and several alterative functions for designing ship's structure, and develop a ship definition system for computer integrated design and manufacturing. This implemented system is called SODAS (System Of Design and Assembly for Shipbuilding). Object oriented concept is used to develop this system. As well as the product model, the design function cutting function, and virtual assembling function are introduced. By using the design function, any type of ship's structure can be designed. And also factory simulation can be carried out by using the cutting function and virtual assembling function.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.234-237
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• 2007

We report on our experience on utilization of collaborative tools for KISTI high energy physics group. Our main subject will be the new EVO (Enabling Virtual Organization) server that we hosted recently at KISTI. The EVO is a next generation collaborative tool from CalTech high energy physics group with several improvements from its predecessor VRVS (Virtual Room Videoconferencing System). EVO has the same baseline structure as in VRVS. The network of servers lies at the heart of EVO structure and one server called Panda communicates with local clients called Koala.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.7
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• pp.1403-1410
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• 1997

Because streaming mode connection server suitable to wide area ATM networks performs transmission, reception and lookup with time restriction for the transmission time of a cell, it has demerits of large cell loss incase that burst traffic occurs. Therefore, in this paper to decrease cell loss we propose a high speed CAM (Content Addressable Memory) which is capable of processing data of streaming mode connections server at a high speed. the proposed CAM is applied to forwarding table VPC map which performs function to output connection numbers about input VPI(Virtual Path Identifier)/VCI(Virtual Channel Identifier). The designed high speed CAM consist of DBL(Dual Bit Line) CAM structure performed independently write operation and match operation and two-port SRAM structure. Also, its simulation verification and full-custom layout is performed by Hspice and Composs tools in 0.8 .$\mu$m design rule.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.82-84
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• 2004

Java's performance is sometimes not acceptable due to interpretation overhead by the Java Virtual Machine (JVM). In this paper, we present a compiler structure of Java-to-C translator for high performance on resource limited environment like mobile devices. Our compiler framework translates Java into C codes to preserve Java's programming semantics such as inheritance, method overloading, virtual method invocation, and so on. Also our compiler fully supports Connected Limited Device Configuration (CLDC) 1.0 API's. We show that our compiler improves the speedup by up to eleven times more than JVM-only execution in measured benchmarks.

• Journal of Korea Game Society
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• v.21 no.2
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• pp.151-160
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• 2021

Alternate reality games (ARGs) are a game genre with characteristics that can lead to changes in current integrated media environments. While technical combinations are being pursued as diverse media are utilized based on formative aspects, the representative, narrative combination of the real and the virtual is a convergent factor in narrative structures. Through perspectives that perceive transmedia storytelling-which has brought convergence to communication among gamers-as having a structure and utility that can outclass previous game forms, this study focuses on ARGs, which have features that converge reality and virtual reality. Further, the study reveals the structure and utility of that system. This study sheds light convergent storytelling, which is in demand in the transmedia age, and which will serve as a significant investigation with regard to social perceptions of future games and changes in game form.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.30 no.3
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• pp.223-230
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• 2017

BIM(building information modeling) has been actively applied to construction industries and to maximize its application through the life cycle of structure, various relevant technologies have been proposed. In particular, 4D sequencing management and 5D cost-related management were introduced as an improved version of the design review and interface control by 3D information design. On the other hand, the virtual construction using virtual construction equipment can sophisticatedly handle capacity, dynamic movement, collision boundaries of actual construction machines but it still stays at a low level in a technical sense. In this study, simulation systems based on BIM involving virtual construction equipment have been developed; then it is applied to the actual construction project to evaluate the safety and efficiency of construction equipments. It was confirmed that the simulation systems can be utilized to construct virtual construction site by using an effective 3D library of construction equipment and can plays a key role to secure construction safety and economic feasibility. Specifically, the simulation system are very useful for decision making by construction managers to select the optimum equipment and construction method with a better understanding for safety and cost-saving.

• Journal of the Korea Computer Graphics Society
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• v.16 no.3
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• pp.11-19
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• 2010

This paper describes how to define and implement the schema for 3D virtual objects with physical units so that the objects can be compared in virtual environments based on physical properties, such as length, according to the specified units. We define physical units for virtual objects using the International System of Units and based on the X3D (Extensible 3D) specification. The schema must be defined with validation so that it does not violate the original X3D data structure. In this paper, we have extended the original X3D schema with a physical unit specification, and demonstrate the difference between units-specified and non-units-specified 3D scenes using an X3D browser that we developed.