• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.1025-1028
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• 2002

In this paper, a micro-turning lathe is introduced for micro machining of aluminum rod. To give feed motion, stepwise motion[2] actuators are used instead of the conventional inchworm mechanism. These are consisted of two Piezoelectric ceramics; one is for feeding the slider, and the other is for clamping the slider in the guide way of the body. The guide is V-form. The linearity and positional accuracy of the actuators is good enough far high precision motion. Since the system is more compact than the conventional system using three Piezoelectric ceramics, it is applicable for the micro-machine or MEMS unit. To fabricate the lathe, a small spindle unit with ball bearings of diameter of 10 millimeter is built-up on the top the slider. The motion is feed backed with miniaturized linear encoder attached each axis slider. The diamond tool bite is used for cutting tool. The machining is tried to make small diameter rod. The possible diameter that can be machined in this machine is presented as well as chip formation, surface roughness, and machinability.

• 한국CDE학회논문집
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• 제11권5호
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• pp.365-374
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• 2006

The ubiquitous environment is to support people in their everyday life in an inconspicuous and unobtrusive way. This environment requires information such as the person, his/her preferences, and habits which is available in the ubiquitous system. In this paper, we propose the context aware system that can provide the tailored information service for user in ubiquitous computing environment. Our system architecture is divided into 4 domain models such as context awareness, presentation, interface and inference domain. Each domain model can perform some predefined tasks independently. And we suggest the hybrid algorithm combined with fuzzy and Bayesian method in order to reason what is the suitable information for user. We show the possibility for the real application through applying the system to the TGA (Tour Guide Assistant) for Kyoungju historical site.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 춘계학술대회 논문집
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• pp.51-54
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• 2005

Light Guide Plate (LGP) of LCD-BLU(Back Light Unit) is manufactured by forming optical pattern with $5\~100um$ in diameter on the LGP by means of sand blasting or etching method. However, in order to improve the luminance of LCD-LGP, the design of optical pattern has introduced UV inclined-exposure process in this study. This micro-optical pattern, which has asymmetric elliptical column shaped pattern, can change low viewing-angle to high viewing-angle, as well as it contribute to diffusion of light. As a result, this type of micro-optical pattern can introduce the highly luminance. The PR structure obtained in the stage of lithography has asymmetric elliptical column shape and it is processed into a micro-optical pattern. Optical design with this kind of micro-optical pattern, mold fabrication by electroplating and LGP molding with injection molding are under way.

• 한국지역지리학회지
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• 제14권4호
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• pp.436-451
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• 2008

본 연구는 베트남 관광에서 나타난 규율 권력의 분석을 통해 관광이 개인의 단편적 행위의 산물이 아니라 사회적 산물이자 반영임을 증명하는데 목적을 두고 있다. 연구 결과는 다음과 같다. 베트남 관광에서의 주체는 여행사와 가이드였고, 관광객은 대상으로 시작하여 권력을 내면화한 주체로 거듭났다. 가이드는 감시, 제재, 분할과 같은 여러 가지 권력 기술을 활용함으로써 관광객을 감시, 통제했고 관광객은 이를 내면화하여 자율적 주체, 다시 말해 현대적 관광자로 행동했다. 베트남 관광 공간에서의 권력은 관광 요소 간의 관계로 존재했고, 특정 관광 공간에 국한하여 나타나지 않고 모든 관광 공간에서 나타났다. 또한 권력은 억압적이라기보다는 생산적으로 작용했다.

• 건축역사연구
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• 제17권1호
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• pp.7-28
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• 2008

Colin Rowe was an important historian, theorist and critic in Modern architecture. His significance in Modern architectural history lies in not only historiography which has changed our view of Modernism but deep theoretical involvement in practice. This study is a critical review and analysis on his formalist approach in Architecture. With a view that his position of formalist has indispensible relationship with liberalism from K. Popper's critical rationalism, this study try to show how his philosophical background has an influence upon his way of seeing architecture, history, form, urbanism, and meaning, etc. And this study also try to explain why the principle of architecture as an autonomous discipline which is the main point of view in Rowe's criticism has been so successful and influential. This study also explain what is the possibility and limitation of Rowe's formalist approach and way of reading buildings. His intelligent way of formal analysis can give us new understandings of how the form generates and the process of design goes on. Furthermore it guide us a new horizon of architecture as a language game. Since his early writings showed both side of formalist approach in architecture and it didn't changed a lot. We can understand his 'Collage City' was a his final answer to his formalist way of making architecture and urbanism. we can estemate it as a utopia without utopianism and an ideology without ideological color.

• 대한수학교육학회지:학교수학
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• 제4권2호
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• pp.261-282
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• 2002

This study intended to search for the way of NIE use as follows: 1) Setting up theoretical base about the way of NIE use to math loaming in primary school. 2) Analyzing the course mathematising through NIE use in math learning in practice. 3) Searching for the way of NIE use to aim at mathematising. As the result, this presented NIE model for mathematising according to the character of each step of the mathematising course. This paper says two things : The first, the way for using learning materials as reonstructing articles of newspapers to teach math learning 1) is searched for each information, scrapped to materialize. 2)is to extract the contents of NIE teaming available to the field and the unit of math curriculum. 3) searches for and applies the model for math NIE teaming. 4) makes up learning materials for each level using articles and presents the matters of deepening and supplement suitable for students. The second, the way for teaching math NIE with a view to helping students' mathematising during the course of teachers' math teaming. 1) reconstructs materials chosen by students' reality. 2) should offer students' communication and abundant context materials which mathematical model is possible. 3)needs to guide students to have motivation teaming so that they can mathematise their real matters by rediscovery 4) progresses mathematical activity using newspapers so that they can apply to new reality by applying informed Idea.

• 한국조경학회지
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• 제38권1호
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• pp.64-73
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• 2010

본 연구의 목적은 우리나라의 보호지역에서 관리개선방안을 마련하는 것이다. 이를 위해 보호지역의 현장조사와 설문조사를 통해 문제점을 파악하였고, 통합관리를 위한 관리개선방안을 도출하였으며, 이에 따른 관리계획지침과 사후평가지침을 마련하였다. 본 연구 결과는 다음과 같다. 첫째, 현재의 우리나라의 보호지역은 지정 후 제대로 관리가 이루어지지 않고 있기 때문에 보호지역에 대한 관리계획 이 필요하다. 둘째, 관리계획 수립 시 관리기관은 관련 이행당사자와의 원활한 협의를 통한 자발적인 참여를 이끌어낼 수 있는 관리계획을 수립해야 한다. 셋째, 관리계획을 지속적이고 체계적으로 지속시키기 위해서는 관련 정책 및 법 제도를 정비해야 한다. 넷째, 보호지역의 중복지정 및 관리의 다원화에 따른 관리의 비효율성을 감안하여 통합관리전담기구를 신설해야 한다. 다섯째, 효과적 통합관리를 위해 관리계획지침과 사후평가지침이 절실히 필요하다. 본 연구 결과는 우리나라 보호지역의 문제점을 해결하기 위한 관리개선에 도움을 줄 수 있을 것이다. 향후 관리계획과 사후평가 부분의 지침에 대한 검증과 국가 차원에서 관련 법 제정, 정책 등의 체계적이고 지속적인 지원이 수반되어야 할 것이다.

• Journal of Information Display
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• 제12권4호
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• pp.167-171
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• 2011

The angular distribution of the luminance on each optical component of 40-inch light-emitting diode backlight was measured and studied, using the optical-simulation method. Several scattering functions were investigated as the reflection distribution function of the scattering dots printed on the bottom surface of the light guide plate (LGP). It was found that both the diffuse Lambertian and near-specular Gaussian scattering functions were necessary for the successful reproduction of the experimental angular distribution of the luminance. The optimization of the scattering parameters included in these scattering functions led to almost the same luminance distribution as that obtained from the experiment. This approach may be an effective way of indirectly estimating the reflection distribution function of the scattering dots of the LGP, which cannot be made accessible through any other experimental method.

• 제어로봇시스템학회논문지
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• 제18권5호
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• pp.445-452
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• 2012

With the increasing number of high-rise and large-scale buildings, modern buildings are becoming intelligent, and are incurring high construction costs and requiring careful maintenance. Maintenance works for high-rise buildings significantly depend on human labor, unlike other construction processes that are gradually being automated. The resulting accidents may produce very high social and economic losses. To address this problem, herein, this paper proposes robotic building maintenance system using multi-robot concept, in specific, cleaning a building facade which is directly subjected to minimize human labor; that improves the process efficiency and economic feasibility. The sensor for detecting contamination of building's outer-wall glass is proposed; Kalman filter was used for estimating robots' status with the contamination of the window glass. Task allocation of the sensor based multi-robots for an effective way of task execution is introduced and the feasibility was verified through the simulations.

• 대한기계학회논문집
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• 제12권4호
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• pp.721-729
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• 1988

본 연구에서는 직진테이블 시작품을 통해 주위환경에 의한 영향 중 주위온도 에 따른 움직임 정밀 정확도의 변화 및 지지조건이 움직임 정밀.정확도에 미치는 영향 에 대해 실험 연구하였다.