• Journal of Information Technology Applications and Management
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• 제20권3_spc호
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• pp.279-293
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• 2013

In general, researchers, policymakers, and practitioners consider innovation by producers as a primary mode in a market economy. However, the recent research has shown that some of the most important, novel products and processes have been developed by users-both user firms and individual end-users. According to von Hippel [1988], he found that they were the developers who made about 80 percent of the most important scientific instrument innovations as well as the major innovations in semiconductor processing. In this research, we conducted grounded research on user-led innovation at the corporate-level. Also, we analyzed the train development project (SR000) of Seoul Metropolitan Rapid Transit Corporation (SMRT). We focused on identifying the success factors of user-led innovation, and development process.

• 한국전자통신학회논문지
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• 제14권4호
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• pp.715-722
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• 2019

본 논문은 가시광 통신을 이용한 사용자 인식 시스템의 구현 방법과 시스템 동작 결과를 소개하고 있다. 가시광 통신을 이용한 사용자 인식 시스템은 안드로이드 시스템 기반의 송신부와 오픈소스 컨트롤러 기반의 수신부로 나뉘어져 있다. 송신부 모듈에서는 사용자의 개인 인식 정보 데이터를 코드로 변환하고 이를 안드로이드 기반의 스마트폰 카메라 인터페이스를 사용하여 가시광으로 변환하여 수신부로 전송한다. 수신부에서는 포토다이오드 모듈을 통해 가시광을 수신하고 이를 전기신호로 변환한다. 수신 데이터에 대한 프로세싱 모듈역할은 오픈소스 컨트롤러가 맡게 되며, 본 시스템에서는 AVR 마이크로 컨트롤러 기반의 아두이노를 사용하였다. 버스트모드(burst mode) 방식의 통신이 가능하도록 0111의 비트 패턴을 스타트비트로 설정하고 이를 인식하도록 하였다. 실험 결과, 제안하는 시스템은 가시광을 매개로 맨체스터 데이터 인코딩 (Manchester data encoding)방식의 데이터 송신과 수신이 가능함을 확인하였다.

• 대한인간공학회지
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• 제18권3호
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• pp.73-86
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• 1999

Nowadays, VCR(Video Cassette Recorder) has various functions, but users use to fail operating these function because of the complexity of operation. The process of operating VCR contains user's cognitive characteristics. It is necessary for designing it that we must identify a user's mental process in the behind of operational behaviors. This effort, as well as considering physical dimensions and layout, can make VCR easy to use. In this research, VCR remote controller are analyzed by the cognitive method and experiments. Three types of VCR remote controllers, cognitive VCR models and two non-cognitive(typical) VCR models, are adopted as experimental objects to test the validation of the suggested user's cognitive mode of VCR. As results, when VCR was operated by the cognitive prototype of remote controller, task completion time was reduced to 80.5%, and the number of errors was reduced to 96.8%.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1797-1801
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• 2004

In this paper we show the hardware testbed and software simulator of multi function array radar (MFAR). The hardware MFAR is simple and flexible hardware to implement various radar beamforming and detecting algorithms. To overcome the limitation of hardware MFAR, the software simulator is proposed. User can simulate radar under the various environment conditions adjusting the parameter of simulator. User can set environment of radar, such as the location and velocity of target, jammer and the terrain clutter. The radar use various probing pulses and supports two operation mode, surveillance and tracking mode.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2011년도 제43차 동계학술발표논문집 19권1호
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• pp.233-236
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• 2011

This paper proposes to use gesture recognition technology to develop 3D game for prevention of dementia. In the game, the user can choose camera mode or mouse mode to play game. In the game design, We focused on the characteristics of dementia, Developed four types of games, Including Memory training game, Math game, Logical training game and 3D visual sense training game. Each type of game is composed by a number of small games. Common feature of all the game is random, This ensures that when user play games, Basically the game will not have the same situation. For the older elderly, If can take 10 minutes a day to play the game and has always insisted on playing, For dementia preventive have a positive effect.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.43-43
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• 2000

In this paper, we introduce a case study of developing a miniature humanoid robot that has 16 degrees of freedom and is able to perform statically stable walking. The developed humanoid robot is 37cm tall and weighs 1,200g. RC servo motors are used as actuators. The robot can walk forward and turn to any direction on even surface. It equipped with a small digital camera, so it can transmit vision data to a remote host computer via wireless modem. The robot can be operated in two modes; One is a remote-controlled mode, in which the robot behaves according to the command given by a human operator through the user-interface program running on a remote host computer, the other is a stand-alone mode, in which the robot behaves autonomously according to the pre-programmed strategy. The user-interface program also contains a robot graphic simulator that is used to produce and verify the robot's gait motion. In our walking algorithm, the ankle joint is mainly used lot balancing the robot. The experimental results shows that the developed robot can perform statically stable walking on even surface.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2016년도 춘계학술발표대회
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• pp.897-899
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• 2016

In recent years, BLE technology has received extensive attention and has been applied to all aspects of life. The existing BLE device has two methods, one is the connection method, and the other is a non-connection method. The representative profile of the connection method is the proximity file. The most typical example of Non-connection method BLE device is a beacon. However, they are both independent and have their own shortcomings. Connection method device can provide service for only one user, others can't use. Security performance of Non-connection method BLE device is poor and the device can't be controlled by the user. In this paper, a combination-mode BLE device profile design scheme is presented, which combines with the previous two methods, and solves the defaults. And We define a dual purpose advertising package that can be used in a normal environment as well as in a disaster environment. Finally, a unidirectional Control idea is proposed. Through performance evaluation, we found that the device has strong stability and low power consumption.

• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.121-127
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• 2018

In this study, we propose a pseudo golf club which can sense user's swing motion and virtual golf simulation system using the pseudo golf club. The proposed system is a virtual golf simulation system of a complex play type in which a player can enjoy various types of golf play according to the user's taste by providing a play mode for hitting an actual golf ball and a play mode for swinging the pseudo golf club. This virtual golf play system calculates and displays the trajectory of a golf ball by a simulator just like playing a real golf, and suggests suitable swing motion, so it helps users to learn golf easily.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2018년도 추계학술발표대회
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• pp.264-267
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• 2018

본 연구에서는 API 호출을 은닉할 수 있는 새로운 유형의 유저모드 기반 루트킷으로 Cuckoo Sandbox를 회피하는 기법과 이를 탐지하기 위한 연구를 한다. Cuckoo Sandbox의 행위 분석을 회피하기 위해 잠재적으로 출현 가능한 은닉된 코드 이미지 기반의 신종 루트킷 원리를 연구하고 탐지하기 위한 방안을 함께 연구한다. 네이티브 API 호출 코드 영역을 프로세스 공간에 직접 적재하여 네이티브 API를 호출하는 기법은 Cuckoo Sandbox에서 여전히 잠재적으로 행위 분석 회피가 가능하다. 본 연구에서는 은닉된 외부주소 호출 코드 영역의 탐지를 위해 프로세스의 가상메모리 공간에서 실행 가능한 페이지 영역을 탐색 후 코사인 유사도 분석으로 이미지 탐지 실험을 하였으며, 코드 영역이 맵핑된 정렬 단위의 4가지 실험 조건에서 평균 83.5% 유사도 탐지 결과를 확인하였다.

• 전기학회논문지
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• 제58권11호
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• pp.2175-2184
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• 2009

This paper describes operational analysis results of the DC micro-grid using detailed model of distributed generation. Detailed model of wind power generation, photo-voltaic generation, fuel-cell generation was implemented with the user-defined model of PSCAD/EMTDC software that is coded with C-language. The operation analysis was carried out using PSCAD/EMTDC software, in which the power circuit is implemented by built-in model and the controller is modelled by user-defined model that is also coded with C-language. Various simulation results confirm that the DC micro-grid can operate without any problem in both the interconnected mode and the islanded mode. The operation analysis result confirms that the DC micro-grid make it feasible to provide power to the load stably. And it can be utilize to develop the actual system design and building.