• 한국의류학회지
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• 제48권2호
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• pp.282-299
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• 2024

This study aimed to examine the impact of virtual influencers' characteristics on purchase intentions through attitudes toward the influencer and the brand, and to identify which factors are important depending on involvement. We used a scenario-based online survey of 320 female consumers in their twenties and thirties, and analyzed their responses through structural equation modeling using AMOS 21.0. Virtual influencers' attractiveness, reliability, familiarity, and virtuality had significant effects on consumers' attitudes toward those influencers, while their attractiveness, familiarity, and virtuality had significant effects on consumers' brand attitudes. Notably, in contrast to the other variables, virtuality had a negative effect. In addition, consumers' attitudes toward the virtual influencer significantly affected their brand attitudes and purchase intentions. We also analyzed which characteristics had significant impacts on high- and low-involvement groups. We found that reliability had the greatest influence on purchase intentions in the high-involvement group and that familiarity had the greatest influence on purchase intentions in the low-involvement group, which confirmed that the variables affecting purchase intentions differ depending on the level of involvement.

• International Journal of CAD/CAM
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• 제9권1호
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• pp.85-91
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• 2010

In this paper, we demonstrate an autonomous design of motion control of virtual creatures (called animated robots in this paper) and develop modeling software for animated robots. An animated robot can behave autonomously by using its own sensors and controllers on three-dimensional physically modeled environment. The developed software can enable us to execute the simulation of animated robots on physical environment at any time during the modeling process. In order to simulate more realistic world, an approximate fluid environment model with low computational costs is presented. It is shown that a combinatorial use of neural network implementation for controllers and the genetic algorithm (GA) or the particle swarm optimization (PSO) is effective for emerging more realistic autonomous behaviours of animated robots.

• 대한기계학회논문집A
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• 제25권5호
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• pp.788-796
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• 2001

VR(Virtual reality) technologies have given engineers the ability to design, test, and evaluate engineering systems in a virtual environment. The virtual plant is the highlight of the application of the VR technology to plant engineering. Plant design, maintenance, control, management, operation are integrated in the virtual plant. The VR monitoring system including the concept of the virtual plant is developed to replace a current control room that has number of gages and warning lamps in two-dimensional panels which shows the operating status of a plant. The operating status of the plant is displayed in the VR monitoring system through the realistic computer graphics. Sophisticated, realistic and prompt control becomes possible. The VR monitoring system consists of advanced visualization, walk-through simulation and navigation. In the virtual environment, a user can navigate and interact with each component of a plant. In addition, the user can access the information by just clicking interesting component. The VR monitoring system is operated with various modules, such as (1) virtual plant constructed with Graphic Management System (GMS), (2) Touch & Tell System, and (3) Equipment DB System of Part. In order to confirm the usefulness of the VR monitoring system, a pilot gas plant which is currently being used for plant operator training is taken as application. The end of the paper gives an outlook on the future work and a brief conclusion.

• Journal of Mechanical Science and Technology
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• 제15권4호
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• pp.448-458
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• 2001

The primary goal of virtual prototyping is to eliminate the need for fabricating physical prototypes, and to reduce cost and time for developing new products. A virtual prototyping seeks to create a virtual environment where the development of a new model can be flexible as well as rapid, and experiments can be carried out effectively concerning kinematics, dynamics, and control aspects of the model. This paper addresses the virtual environment used for virtual prototyping of a passenger vehicle. It has been developed using the dVISE environment that provides such useful features as actions, events, sounds, and light features. A vehicle model including features, and behaviors is constructed by employing an object-oriented paradigm and contains detailed information about a real-size vehicle. The human model is also implemented not only for visual and reach evaluations of the developed vehicle model, but also for behavioral visualization during a crash test. For the real time driving simulation, a neural network model is incorporated into the virtual environment. The cases of passing bumps with a vehicle are discussed in order to demonstrate the applicability of a set of developed models.

• 한국CDE학회논문집
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• 제12권1호
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• pp.39-49
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• 2007

Recently three-dimensional (3-D) die design and production process has been widely introduced into the tooling shops of automotive manufacturers to reduce time-to-production of brand-new automobiles. 3-D solid models created in CAD systems are used not only for various simulations for design verification, but also for NC tool path generation to machine dies and their Styrofoam patterns. However, a lot of time and cost will be required to build solid models for dies if designers use only the generalized modeling capabilities of commercial 3-D CAD systems. To solve this problem, it is necessary to customize 3-D CAD system for the specific die design and manufacturing process. This paper describes a dedicated 3-D CAD system based on Unigraphics for die design for automotive body panels. The system provides not only 3-D design capabilities, but also standard part libraries, to enhance design productivity. The design process modeling technology has been introduced to facilitate redesign of the die for the modified panel. By introducing this system, dies can be designed more rapidly in the 3-D space, and their solid data can be directly transferred to CAM tools for NC tool path generation and simulation tools for virtual manufacturing.

• 한국산학기술학회논문지
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• 제9권5호
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• pp.1139-1144
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• 2008

본 논문에서는 가상 플랫폼을 이용하여 빠르고 효과적으로 시스템을 검증하기 위한 추상레벨의 자동생성에 대하여 제안한다. 추상레벨 가상 플랫폼은 효과적인 검증 방법이긴 하지만 시스템이 변경될 때마다 가상 플랫폼을 재생성하고 추가적인 설계/검증을 요구되며 이 작업은 매우 많은 시간을 요구한다. 이러한 문제점을 해결하기 위하여 본 논문에서는 CPU, 메모리, UART 등을 기본적인 요소로 구성하여 추상레벨의 라이브러리로 생성하였다. 이 라이브러리를 이용하여 가상 플랫폼을 자동 생성하는 툴을 개발하였다. 이 툴은 임베디드 RTOS를 구성하는 가상 플랫폼을 자동 생성하며 HW/SW 간의 통신을 위한 메모리 맵과 디바이스 드라이버 등도 생성한다. 제안한 방법은 JPEG과 H.264에 성공적으로 적용하였으며 기존의 수동 작업에 비하여 매우 빠르게 가상 플랫폼을 자동 생성할 수 있었다.

• 스마트미디어저널
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• 제13권1호
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• pp.86-100
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• 2024

최근 문화정책 기반 연구과제 및 공공기업들의 홍보수단으로 가상현실 전시형 콘텐츠 서비스가 적지 않게 제작되고 있다. 특히 시각, 예술, 기록 등 문화자원을 기초로 하는 대부분의 아카이브 자료들이 엔티티 기반 데이터모델링 개념으로 활용되고 있는 점이 두드러진다. 하지만 3차원 예술작품을 데이터화하여 축적하는 일은 결코 쉬운 일이 아니다. 현재 공공기관 메타데이터들의 실태를 살펴보면 오래된 국제표준을 기반으로 구축되었기 때문에 디지털트윈을 개발할 때 자원 디지털화의 부재가 있었다. 기존 시스템의 기능을 뛰어넘는 용량과 속도로 다차원 데이터들을 연결함에 데이터모델링 진화가 불가피하다는 점을 발견하였다. 따라서 우선 선행연구 중에 데이터모델링 설계의 요소들과 개념들을 고찰하였고 가상현실 콘텐츠를 개발할 때 3차원 모델링 데이터들의 마이그레이션을 위해 설계되는 경우 기존에 작성된 메타데이터를 분석하여 3차원 모델링에서 추가되어야만 하는 상위요소들을 개선하는 연구를 하였다. 나아가 본 연구에서는 새롭게 작성된 메타데이터를 데이터모델링 프로세스에 맞게 가상현실 콘텐츠에서 활용되는 과정을 직접 구현하여 가능성을 실증해 보았다. 이를 통해 개발자들이 가상현실 전시콘텐츠 제작에서 시소러스를 어떻게 데이터로 연결하는 과정을 검증하였고 메타데이터를 작성하는 사용자에게는 디지털 요소로 추가되어야 하는 필수요소들을 제안하였다. 향후 본 연구에서 도출된 데이터 방식으로 시각예술기록 및 3차원 모델링 데이터모델링 구조를 점진적으로 발전해 나간다면 앞으로 메타데이터 기반 데이터모델링이 현재보다 유의미해지고 개발자들의 공공데이터 활용성에 대해 더욱 향상할 것을 기대해 본다.

• 한국CDE학회논문집
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• 제5권4호
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• pp.312-318
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• 2000

In this study, an exclusive CAD/CAM system is developed for enhancing the effectiveness and productivity of CNC universal cylindrical grinding machines on which the external/facing/internal grinding cycles and the wheel dressing cycles are integratively carried out. The CAD/CAM system can manage the various processes such as geometry design, NC code generation, NC code verification, DNC operation, and so on. Especially, the feature-based modeling concept is introduced to improve the geometry design efficiency. And the NC code verification is realized by virtual manufacturing technique based on the real-time analysis of NC codes and the boolean operation between workpiece and wheel.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.176-181
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• 2007

The widespread of IT technology caused a remarkable change in many industries and the construction industry is also one of them being influenced in the form of CIC(Computer Integrated Construction) and BIM(Building Information Modeling). Construction projects have many participants from various disciplines involved throughout the entire process. Therefore the success of the project greatly depend on the efficiency of decision-making using the information generated from each process stage. Looking from this aspect, the greatest potential value lies in the planning and pre-design stage when considering the construction life cycle. In this paper, we propose a project on developing a 3D object oriented simulation system for supporting the pre design phase. We define the needs for such system through previous case studies and suggest a to be process model. Finally we anticipate the effects that the project will eventually contribute to the construction industry.

• 드라이브 ㆍ 컨트롤
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• 제11권2호
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• pp.9-15
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• 2014

This paper deals with the issue of force synchronizing control for the clamping servomechanism of injection molding machines. Prior to the controller design, a virtual design model has been developed for the clamping mechanism with hydraulic systems. Then, a synchronizing controller is designed and combined with an adaptive feedforward control in order to accommodate the mismatches between the real plant and the linear model plant used. As a disturbance, the leakage due to the ring gap with relative motion in the cylinder has been introduced. From the robust force tracking simulations, it is shown that a significant reduction in the force synchronizing error is achieved through the use of a proposed control scheme.