• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.526-528
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• 2022

실외 자율주행 청소 로봇을 위한 인공지능기반 자율주행 시스템을 개발하였다. 개발된 시스템은 ROS(Robot Operationg System) 기반으로 이루어졌으며, 3D 라이다와, 초음파 센서를 활용하여 주변의 장애물을 감지하고 GPS와 영상을 활용하여 로봇의 위치 인식을 하여 자율 주행을 진행하였다. 자율주행 실험결과 영상과 RTK-GPS를 사용하여 정해진 경로를 ±20cm이내의 오차를 가지고 추종하면서 청소를 진행하였다.

• 한국태양에너지학회:학술대회논문집
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• 2008.11a
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• pp.53-56
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• 2008

A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system used infinity of solar energy, cost of fuel is needless and there in no air pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 30[kW] large scale applications installed in Mokpo National University dormitory roof. The status of photovoltaic system components, are inter-connection and safety equipment monitoring system will be summarized as this article. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 30[kW] utility photovoltaic system examination result.

• Proceedings of the SAREK Conference
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• 2005.06a
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• pp.203-203
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• 2005

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.4
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• pp.727-738
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• 2000

내장형 시스템(Embedded System)은 운영체제와 함께 사용자가 원하는 목적과 기능의 응용프로그램을 내장하여 원하는 작업을 할 수 있도록 해주며, 각종 전자기기들이 디지털화 되면서 각종 기능들을 제어하기위한 운영체제로서 내장형 운영체제가 주목을 반기 시작하였다. 데스크탑 시스템과 내장형 시스템의 하드웨어 특성과 요구사항은 서로 다르기 때문에 데스크탑 기반의 Unix 운영체제로 널리 쓰이고 있는 GNU/Linux를 내장형 시스템의 운영체제로 사용하기 위해서는 여러 가지 운영체제 구성 요소들에 대한 최적화가 뒤따라야 한다. GNU/Linux의 최적화를 위해 고려해 볼 수 있는 다섯 가지 방법을 설명하고, 실례로서 LRP와 ZDISK에서 만든 결과를 분석해 보기로 한다.

• Convergence Security Journal
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• v.4 no.2
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• pp.43-51
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• 2004

Operating systems and application programs have security vulnerabilities derived from the software development process. Recently, incident cases related with the abuses of these vulnerabilities are increasing and the damages caused by them are becoming very important security issues all over the nations. Patch management is one of the most important processes to fix vulnerabilities of softwares and to ensure a security of systems. Since an institute or a company has distributed hierarchical and heterogeneous systems, it is not easy to update patches promptly. In this paper, we propose patch management framework to safely distribute and install the patches on Windows, Linux, and Solaris client systems. Besides, we considered extensibility and hierarchical structure for our patch management framework to support large scaled network environment.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.761-765
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• 1997

Our study of rider's postulator stability and tracking control on a unicycle began form the observation of a human riding. The system including unicycle and human operationg his unicycle is a fuzzy intelligent biomechanical model on basis of instinct and intuition search mechanisms. We proposed a robotic unicycle with one wheel and one body as a basic mode and derived equation of motion to this model. Our works is in making out fuzzy look-up table to control robotic unicycle. Fuzzy look-up table were determined for staight line and curve under reasonable inference emulating human's instinct and intuition riding a unicyale. Simulation results show that postulator stability and tracking control on both straight line and curve were successful by using proposed each fuzzy look-up table.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.481-485
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• 2003

This study describes the real-time measurement system which consist of multi-components load cell and linear motor. Operationg and data acquisition is controlled by PC. Multi-components load cell measures simultaneously the vertical force Fz and frictional force Fx when contactors move on sample surface. Linear motor is used to translate with constant speed without vibration. The frictional coefficient is calculated by Matlab$^{TM}$. The frictional coefficients between Al. plates. and fingertip and fabrics are measured.d.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.383-385
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• 2019

영유아들은 호기심이 많아 어떤 것을 조작하며 경험을 통해 더욱 더 발달하게 되는데, 아이들의 인지발달을 더욱 정교하고 정확하게 발달할 수 있도록 도움이 되는 놀이를 통해 유도해 주어야 한다. 4차 산업시대를 맞아 로봇을 이용함으로써 호기심을 불러 일으켜 새로운 경험을 할 수 있도록 돕고, 더 나아가 소프트웨어에 대한 호기심까지 이끌어 낼 수 있을 것이라 기대한다. 본 논문에서는 무선 통신을 통해 프로세싱과 ROS를 연동하여 프로세싱에서 그린 그림을 로봇이 돌아다니며 바닥에 그릴 수 있는 S/W, H/W를 구현하였다.

• Journal of Korean society of Dental Hygiene
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• v.7 no.4
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• pp.381-393
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• 2007

The objectives of this study was to suggest for prophylatic of Musculoskeletal system disorders in Dental Hyginists and Dental hygiene students to maintain good posture in the dental hygiene curriculum. This study was carried with 100 dental hygienists in "M" city located in Jolla Province and 82 college students majoring in dental hygiene. The results were as follows: 1. During the operators' medical treatment, 41.7% answered that the patients' head was located in the operators' chest during their treatment. Also, 58.3% answered that the patients' head was located in the operators' abdomen. For this reason, 81.3% said that the patients' mouth became close to the operators' eyes - less than 30cm. And 65.1% said that they performed an operation in various directions. 2. The most common posture -between the position of operating and the position of assisting- is the position of operationg 1. The position of operationg 1 and 5 have an effect on the waist, and the position of assisting 3 has an effect on pains of the waist, bottoms, knees, ankles and feet. 3. The common symptoms of musculoskeletal system disorders in dental hygienists and student was the neck ache and the shoulders, and was followed by the lower back. From the cases that they visited in health care or apothecary to the above pain, symptoms were highest in the shoulders(18.3%) and were followed by the lower back(13.4%) and neck(9.1%). 4. On The necessity of education related to, According to researches, 96.3% college students and 92.5% dental hygienists answered that education related to Musculoskeletal system disorders is necessary. 5. In this study, I have 3 limitations. First, the subject of survey was selected for specific people in the specific city, Second, the personal judgment was made in judging the relations of the position of operating, the position of assisting and the aches. Third, the relations of the position of operating, the position of assisting and the aches don't have supporting medical evidences. Therefore, this study will be carried on more people with more objectives and medical method.