• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2007년도 춘계학술대회A
• /
• pp.1167-1172
• /
• 2007

Generally inpipe robot needs force above standing for contacting robot to pipe. If the environment of the pipe-inside does not change, there is not a problem. But if the pipe radius change, or occur the obstacle which it does not intend, problem gets. So it uses a different system and must know an environment change, and changing the shape or a form of the robot. The research uses the flexible leg and is the robot which is adapted to the environment change of the pipe. The advantage of this robot is possible to move when it does not need to recognize a change of environment of pipe. Leg is bend with one direction. When it moves part that there are legs effect of leg direction the robot is moved with only one direction. If friction between legs and pipe is sufficient, not only verticality pipe moving, but also curved pipe moving. Also the obstacle of the pipe inside occurs and the diameter of the pipe inside changes, this robot can move if it does not use another system or device.

• 만화애니메이션 연구
• /
• 통권11호
• /
• pp.73-85
• /
• 2007

이 논문에서는 초현실주의 회화의 다양한 기법이 애니메이션에서는 어떻게 표현되는 지를 분석하였다. 특히 초현실주의의 꼴라쥬는 아무 관련성 없는 사물과 기법을 재배치함으로써 무의식 속에 잠재되어 있는 환상의 세계를 일깨우며 매체의 변화와 더불어 그것은 전혀 다른 물질이나 형상끼리의 우연한 만남에서 오는 새로운 이미지의 형성한다. 이러한 초현실주의의 기법의 확장을 라울 세르베의 작품<밤의 나비들>에서 논의해보고자 한다. 라울 세르베는 <밤의 나비들>에서 기존의 가치를 전복하는 새로운 접근방식을 통해 인간의 인식 구조에 보다 다차원적인 변화를 가져온 것이다.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
• /
• pp.830-839
• /
• 1993

Agricultural hydraulic robot which was reported in Part Ⅰ had been developed . The robot satisfied performance to intend before development. For actual use, however, it have been necessary to reduce manipulator weigh and to simplify construction of hydraulic control valve. Then, working stress of manipulator link and pressure fluctuation of hydraulic circuit were measured. Step and frequency response tests were done subject to amplitude of reference voltage of 0.1 , 0.3 , 0.5 and 1.0v. and delivery pressure of 3.5 and 5.0MPa. Working stress were about 25% comparing with fatigue strength, Thus, mass of manipulator might be reduce to 30 %. In hydraulic control system, virtual natural frequency of 6.5Hz is produced from the combination of drain passage area shortage of servovalve. Further , because of passage area shortage , working pressure at both side of cylinder was acted on. This phenomenon prevent utilize effectively engine power. Then, control valve for new model was p oposed.

• Journal of Information Technology Applications and Management
• /
• 제23권2호
• /
• pp.207-224
• /
• 2016

Investments in information and communication technologies (ICT) around the world have grown at an enormous rate over the past two decades, which reflects a new emphasis on consumer mobile devices. A social network service (SNS) is an online service that aims to build social relations among people who share interests and activities. The role of SNS is enormous for communicating ideas and opinions among social participants. The use of SNS has recently become one of the most popular social activities worldwide. This research investigated relation between personal characteristics, social characteristics and user satisfaction on SNS then, analyzed how these factors affecting continuance usage intention on SNS users. The conclusion is summarized as below. The study results show that informativeness, pleasure, innovativeness, relationship and empathy of SNS are having positive impact to some degree on the user satisfaction. Further, the user satisfaction of SNS users and quality of life have a positive impact on the continuance usage intention of SNS users. This results show that various SNS qualities are necessary to actively explore and obtain further information that users intend to find, while they are insufficient in function to provide the information other users require or exchange information with other users through the SNS.

• 대한수학교육학회지:학교수학
• /
• 제12권3호
• /
• pp.411-424
• /
• 2010

이 연구는 Steffe의 분수 조작과 스킴의 바탕이 되는 분할 및 반복과 관련된 예비 초등교사가 지니고 있는 개념 인식도를 분석하고 이를 통해 약간의 교육적 시사점을 얻고, 분할과 반복의 방법이 사용될 수 있는 실제적인 응용의 일환으로, 나누는 수가 분수인 분수 나눗셈과 관련된 초등 수학교과서 내용을 재구성하는 예시를 제공하고자 한다.

• 한국산업융합학회 논문집
• /
• 제6권2호
• /
• pp.131-139
• /
• 2003

The links operating interrupted flow are intend to yield the traffic between the out flow and inflow part effect zone of street section, we build the delay model using the time gap between under construction and not. We review the applicability of interrupted flow, and thus we can put this data to practical use as the basis data to compute the inducement charge for traffic delay. Also building about traffic effect zone of interrupted flow wouldn't produce at the section beside occupying roads and construction cross section, thus we must review the plan to minimize traffic delay by the construction occupying road. In future there must be advanced the incomplete in this study, and groping for the various alternatives to minimize the traffic delay by the road occupying construction, with developing the various sets of detailed analyzing models, that is analysis on the street strength, crossroads geometrical forms of crossroads, public traffics, pedestrians, occupying types.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권8호
• /
• pp.3888-3910
• /
• 2018

As an increasing number of defense methods against control-data attacks are deployed in practice, control-data attacks have become challenging, and non-control-data attacks are on the rise. However, defense methods against non-control-data attacks are still deficient even though these attacks can produce damage as significant as that of control-data attacks. We present a method to defend against non-control-data attacks using influence domain monitoring (IDM). A definition of the data influence domain is first proposed to describe the characteristics of a variable during its life cycle. IDM extracts security-critical non-control data from the target program and then instruments the target for monitoring these variables' influence domains to ensure that corrupted variables will not be used as the attackers intend. Therefore, attackers may be able to modify the value of one security-critical variable by exploiting certain memory corruption vulnerabilities, but they will be prevented from using the variable for nefarious purposes. We evaluate a prototype implementation of IDM and use the experimental results to show that this method can defend against most known non-control-data attacks while imposing a moderate amount of performance overhead.

• 교육시설 논문지
• /
• 제27권2호
• /
• pp.57-68
• /
• 2020

This research aims analyze the current situation and problems of cultural heritage education, and propose the methodology of cultural heritage education and the model of the curriculum for each education subject. This study consists of three parts. First, the current status of education related to cultural heritage was examined separately by general public, university and graduate students, and practitioners. Second, we reviewed the National Competency Standard(NCS) and the UNESCO World Heritage Competency Framework(CF) as a way to solve the problem of cultural heritage education for each education subject. By examining the methodology and curriculum model of cultural heritage education, we tried to find the future direction of cultural heritage education. Third, the education model of the cultural heritage curriculum for each educational subject was proposed by reflecting the direction and the cyclical education model of sustainable cultural heritage education. In future studies, we intend to use the education model presented in this study to specifically propose basic guidelines for the cultural heritage convergence curriculum.

• 한국환경복원기술학회지
• /
• 제13권5호
• /
• pp.28-37
• /
• 2010

This study is intend to evaluate natural conservation value, and to suggest natural park plan based on conservation value evaluation. In this study evaluation items are selected through related studies about ecological conservation evaluation, and evaluation items in this study can be classified into 2 aspects, ecological environment and topographic environment. After each evaluation items are overlaid with GIS program, management levels are derived from comprehensive overlaid maps of each evaluation items. Management areas can be classified into 5 levels; Critical Conservation Area, Conservation Area, Restoration Area, Passive Usable Area, Active Development Area and Settlement Area. So management areas can be matched each management levels to land use of natural park, that is district of preservation, district of natural environment, district of settlements and district of mass facilities. This study have good enough to evaluate ecological value for natural park plan, but, it is difficult to evaluate conservation value only with maps of each evaluation items, so it needs supplementary field survey for precise conservation value evaluation.

• 융합신호처리학회논문지
• /
• 제18권1호
• /
• pp.25-30
• /
• 2017

현재 곡물선별기는 대부분 CCD 광학카메라를 이용하여 불량품을 찾아내고 있다. 본 논문에서는 CCD 카메라를 이용함과 동시에 근거리적외선 센서의 수분측정 방법을 추가하여 곡물선별기의 선별력향상을 목표로 한다. 그리고 구현한 알고리즘을 곡물선별기에 실제로 적용할 수 있도록 근거리적외선 영상보드 시스템을 개발하여, 원료의 내부 수분 함량을 고속으로 체크하여 일정함량 미달인 경우 불량으로 간주하여, 불량품을 실시간으로 제거하는 곡물선별기 시스템을 개발하고자 한다.