• 제어로봇시스템학회논문지
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• 제7권11호
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• pp.904-911
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• 2001

A broomstick swinging biped acrobatic controller is designed and simulated to show capability of the system of controllers: virtual model controller is employed for the robot\`s posture balancing control while a higher level fuzzy controller modulate the one of the virtual model controller\`s parameter for the pendulum swinging motion generation. The robot is of 7 degree-of-freedom, 8-link planar bipedal robot having two slim legs and a body. Each leg consists of a hip joint, a knee joint, an ankle joint and the body has a free joint at the top in the head at which a freely rotating broomstick is attached. We assume that the goal for the acrobat robot is to maintain a body balance in the sagittal plane while swinging up the freely up the freely rotating pendulum. We also assume that the actuators in the joints are all ideal torque generators. The proposed system of controllers satisfies the goal and the simulation results are presented.

• 스마트미디어저널
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• 제4권1호
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• pp.52-57
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• 2015

최근 게임과 무관한 분야에 게임적인 요소를 가미한 게임화 마케팅 기법이 등장하고 현실과 가상의 경계가 허물어지는 대체 현실 게임이 출현하는 등 기존 게임의 범위를 넘어서는 새로운 차원의 게임이 나타나고 있다. 이러한 가능성이 온라인 야구 시뮬레이션 장르의 게임에 도입되고 있다. 본 연구는 최근 인기 있는 프로야구 매니저 게임을 대상으로 3명의 피험자를 통해 GOMS 모형을 구축하는 탐색적 연구이다. 이를 위해 피험자를 대상으로 게임을 플레이한 후에 게임을 통해서 경험한 내용을 녹취하고 녹취된 어휘들을 분석하여 프로야구매니저 게임에 대한 GOMS의 목표(Goal)에 대한 위계적 구조를 개발하였다. 이를 통해 가상과 실제의 경계를 허물고 둘 간의 상호작용으로 대체현실게임의 게임화 가능성을 모색하였다.

• International Journal of Computer Science & Network Security
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• 제22권5호
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• pp.115-120
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• 2022

New realities of social relations are changing the understanding of certain phenomena, including the emergence of new concepts among the objects of property rights, such as: virtual assets, and the circulation of virtual assets. The rapid development of the virtual assets market involves the legislative consolidation of the status of such assets, changes in taxation, their circulation, and so on. These circumstances increase the interest in the study of virtual assets as the latest object of property rights and necessitate the study of this topic. The work aims to explore the theoretical developments and regulations on virtual assets in the modern world, as well as to summarize the conclusions about virtual assets as the latest object of property rights. The object of research is the content of the concept of "virtual asset" and its legal status. The methodology of work is represented by a set of methods and techniques that were used to achieve this goal, namely: hermeneutic, historical, extrapolation, comparative law, generalization, analysis, synthesis, and deduction. The study analyzed different approaches to understanding virtual assets, analyzed the characteristics of virtual assets, and concluded that in today's conditions there is no single unified legal regulation of virtual assets, although many countries are moving towards consolidating the status of virtual assets.

• 융합정보논문지
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• 제11권10호
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• pp.60-67
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• 2021

본 연구의 목적은 임상현장실습이 어려운 COVID-19 상황에서 가상 시뮬레이션을 포함한 온라인 정신간호학실습이 간호대학생의 목표몰입, 자기효능감, 비판적 사고성향 및 문제해결 능력에 미치는 효과를 파악하고자 시행되었다. 본 연구는 단일군 사전·사후설계이다. 연구 대상자는 A광역시에 소재한 간호학과 3학년을 대상으로 온라인 설문지를 이용하여 수집하였고 31명이 최종 참여하였다. 연구결과 목표몰입, 비판적 사고성향은 사후조사에서 사전조사보다 향상되었으나 통계적으로 유의하지 않았다. 자기효능감(t=4.222, p<.001)과 문제해결능력(t=6.807, p<.001)은 온라인 실습전보다 실습후에 통계적으로 유의미하게 향상되었다. 이 결과는 가상시뮬레이션을 포함한 온라인 정신간호학실습이 자기효능감과 문제해결능력 향상에 효과가 있음을 의미한다. 최근 COVID-19 의료현장에서의 직접 간호수행이 어려운 만큼 정신간호학실습에 가상 시뮬레이션을 포함한 다양한 온라인 콘텐츠를 활용한다면 온라인 실습의 한계를 극복할 수 있을 것으로 기대된다.

• 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.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2002년도 하계학술대회 및 세미나
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• pp.199-207
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• 2002

A virtual laboratory for measurement and instrumentation must aim to realize an integrated environment. To achieve this goal, we designed and implemented a client/server distributed environment and developed a web-based virtual laboratory system for electronic circuits. Since our virtual laboratory system is implemented to describe the on-campus laboratory, the learners can obtain similar experimental data through it. The proposed virtual laboratory system is composed of four important components Principle Classroom, Virtual Experiment Classroom, Evaluation Classroom and Overall Management System. Through our virtual laboratory, the learners will be capable of teaming the concepts and theories related to electronic circuit experiments and how to operate the experimental equipments such as multimeters, function generators, digital oscilloscopes and DC power supplies. Also, every activity occurred in our virtual laboratory is recorded on database and Printed out on the preliminary report form. All of these can be achieved by the aid of the Management System. The database connectivity is made by PHP and the virtual laboratory environment is set up slightly differently for each learner. Finally, we have obtained several affirmative effects such as reducing the total experimental hours and the damage rate for experimental equipments and increasing Loaming efficiencies as well as faculty productivity.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.1003-1006
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• 2005

Vertex shader of GPU in personal computer is advanced in functions as to be half of traditional fixed T&L functions. And, capacity of memory for saving resources to process instructions is unlimited. GPU that can be programmed by programmer is needed for mobile system as well as personal computer. In this paper, we implement software virtual machine for vertex shader using C++ Language. Our goal is designing hardware GPU that can apply to mobile system. The virtual machine consists of nVidia GPU instructions. Input Data to virtual machine is generated by Microsoft fxc compiler. That is to say, Input Data is compiled shader program written in HLSL, Cg, or ASM. The virtual machine will be a reference model for designing hardware GPU and can be used for Testbed to test added or modified instruction.

• 산업공학
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• 제11권3호
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• pp.219-225
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• 1998

Presented in this paper is a state-of-the-art review of VM(Virtual Manufacturing). To survive on a global competition, manufacturers must shorten the time to market for their products. To achieve this goal, many manufacturers have implmented CIM systems. VM is a new direction in the CIM system development having emphasis on enhancing the decision-making capability. VM can be defined an integrated, synthetic manufacturing environment exercised to enhance all levels of decision and control. Also, VM is the use of computer models and simulations of manufacturing processes to aid in the design and production of manufactured products. Currently, VP(Virtual Prototyping) and VF(Virtual Factory) are main theme to develop a VM. In this paper, the concept and current status of VP and VF are explained.

• 한국도서관정보학회지
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• 제39권2호
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• pp.147-167
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• 2008

본 연구는 중국 대학도서관의 가상참고서가 구축 현황을 조사, 분석함으로써 문제점을 발견하고, 가상참고서 가가 향후 지향해야 할 방향을 제시하는데 목적을 두고 있다. 본 연구에서는 이를 위해 가상참고서가의 이론적 토대를 마련하였다. 그리고 이 이론에 근거하여 가상참고서가의 평가기준을 세우고 이 기준에 따라 중국 "985프로젝트"에 입선된 38개 대학도서관을 중심으로 가상참고서가의 구축현황을 분석함으로써 협동구축의 당위성을 이끌어냈다.

• 한국멀티미디어학회논문지
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• 제20권6호
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• pp.935-949
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• 2017

The purpose of this study was to analyze the characteristics of virtual manipulatives apps that can be used to teach students struggling to learn mathematics. To achieve this goal, ten general characteristics of 23 virtual manipulatives apps were evaluated. The instructional, interface, and interactive design features of apps were also evaluated on five-point scale ratings of 18 items. In addition, SPSS frequency analysis and the correlation between each feature was analyzed. Frequently presented instructional contents among 23 virtual manipulatives apps were geometry, arithmetic operation, number concept and measurement. The frequently presented level of instructional contents was lower grade elementary school and kindergarten age. The frequently presented instructional type was the simulation. Regarding the design features, instructional design was rated as the highest (mean = 3.7); interactive design (mean = 3.6) and interface design (mean = 3.3) were also rated higher than neural. In addition, as the learning strategy was appropriately presented, it was evaluated that there was less screen linkage and content error.