• 대한치과보철학회지
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• 제61권4호
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• pp.356-366
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• 2023

의치의 지지, 유지, 안정은 무치악 환자의 총의치 수복 시 중요한 요소들이다. 최근 디지털 치의학의 발전으로 전통적인 치료방식을 대체하기 위한 시도들이 계속되고 있으며, 환자의 내원 횟수를 줄이고 높은 수준의 디지털 의치를 제작하려는 시도들이 계속되고 있다. 본 증례에서는 새롭게 고안된 고딕 아치 기록을 통한 중심위 채득이 가능한 tray와 안면 스캔을 이용하여 디지털 총의치로 수복하였다. 전통적인 총의치 수복방식을 대체하여 환자의 내원횟수를 줄이고 만족할만한 의치의 지지, 유지, 안정 및 심미적인 결과를 얻었기에 이를 보고하는 바이다.

• ETRI Journal
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• 제39권4호
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• pp.480-492
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• 2017

A holographic display based on a viewing window enables the converging of a reconstruction wave into a viewing window by means of an optical system. Accordingly, a user can observe a reconstructed hologram image, even with a small diffraction angle. It is very difficult to manufacture an optical system with no aberrations; thus, it is inevitable that a certain amount of wave aberrations will exist. A viewing-window-based holographic display, therefore, always includes distortions in an image reconstructed from a hologram pattern. Compensating the distortions of a reconstructed image is a very important technical issue because it can dramatically improve the performance when reconstructing a digital three-dimensional content image from a hologram pattern. We therefore propose a method for suppressing image distortion by measuring and compensating the wave aberration calculated from a Zernike polynomial, which can represent arbitrary wave aberrations. Through our experimental configuration using only numerical calculations, our proposed method decreased the reconstructed image distortion by more than 28%.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 춘계학술대회 논문집 센서 박막재료 반도체재료 기술교육
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• pp.51-54
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• 2002

Recently, due to its better photosensitivity in X-ray, the amorphous selenium based photoreceptor is used on digital direct method conversion material. Compared to other photoconductive material, amorphous selenium has good X-ray response characteristic and low leakage current. It has many parameters of detecting X-ray response on selenium. Among of them, it is well known that manufacture of a-Se is the most basic element. In this paper, we fabricated two types of amorphous selenium sample which had time variable. The one was fabricated continuous deposition sample and the other was step by step sample. Thickness of sample was $300{\mu}m$ and top electrode was evaporated gold. We investigated the leakage current and photo current of them and analysed their electrical characteristics. For analyzing morphology of samples, SEM and surface was pictured. We found that step by step deposition method could be applied for novel fabricating amorphous selenium film.

• 디지털산업정보학회논문지
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• 제10권2호
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• pp.37-45
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• 2014

This paper is a study of the water sensor using a coaxial cavity resonator. This water sensor uses the resonant frequency variation of the coaxial cavity resonator when there is a water drop of the used coaxial cavity resonator. And we made resonant frequencies by controlling the input voltage of the oscillator which will be mainly resonated in the coaxial cavity resonator. First, we made the coaxial cavity resonator by simulating the resonator structure with the proposed size and we expect the resonant frequency from the simulation and then we decide the VCO from the result. Second, we made the water drop detecting sensor circuit and measured the water sensor. We decided the size of the resonator as inner conductor 5mm, outer conductor 14mm, the height of resonator 9.5mm, and the height of the glass 6mm from the simulated result. The simulated resonant frequencies are 3.09GHz and we made the VCO frequency ranges from 2.56GHz to 3.2GHz. The measured resonant frequency is 2.97GHz and the return loss is under -8. 4 dB at the center frequency. When the water is dropped on the glass of the resonator, the voltage has changed from 690mV to 145mV. It shows the proposed water sensor can detect the water by the resonant frequency variation of the resonator.

• 한국정밀공학회지
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• 제11권6호
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• pp.185-199
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• 1994

This study has been performed to present a new automatic tool wear measurement by digital image processing. The purpose of this paper is to develop an automatic tool wear measuring system based on the image processing which can be applied to the quasi-real time measurement of the characteristics of insert tip in turning. Tool wear monitoring is one of the key-problems, for the development of control systems of modern unmanned factory which are not completely solved now. In oredr words at present complete qualitative and quantitative information on tool wear morphology is required, at least on the following aspects : flank wear, its dimensions and distribution on the maximum and mean values on VB pqrqmeter in the various zones of the wearland. crater wear, its main dimensions and values of KT parameters. This research has been performed to this technique made possible by designing a proper lighting system to the worn tool with following features : The flank wear is measured by observing the active cutting part from a proper direction and by lighting the wearland by a diffuser optic system. The crater wear is visualized by lighting the tool by a He-Ne gas laser system developed in this study. By means of this system it is research to evaluate classical parameters of tool wear and to have complete information about tool wear morphology.

• 한국측량학회지
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• 제11권2호
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• pp.89-100
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• 1993

본 연구는 CAD와 LISP(LIST Processing)을 이용한 도로노선 결정에 있어서의 토공량 산정에 관한 연구이다. 컴퓨터의 비약적인 발전과 산업분야에서의 이용증대는 CAD/CAM/CAE 기술의 발전으로 이어져 자동설계 및 자동제작을 가능케 하고 있으며 또한 토목설계의 자동화도 꾸준히 추진되어 오고 있는 실정이다. 이러한 자동화 작업의 일환으로 본 연구에서는 도로노선 결정시 각 노선의 토공량 산정을 자동화하여 토목설계업무의 효율성을 높이고자 하였다. 연구의 방법으로 지형도에 DTM(Digital Terrain Model) 개념을 도입하여 지형정보를 자동독취할 수 있도록 프로그램화 한 후 이 데이타를 가지고 LISP 언어를 이용하여 체계적인 알고리즘을 만든 후 CAD 시스템과 접목시켜 종·횡단 면적과 토공량을 산정해서 유토곡선을 출력하는 자동설계 시스템을 시험적으로 구축하는 데 그 목적을 두고 있다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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• pp.129-132
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• 2004

A guard lamp system has been installed at the PV positive center, located at Gwangju in Korea. Digital environment that is represented to internet is displacing business way of industry and business achievement way with the fast speed being giving great change on life whole, improve existence business process utilizing internet and Web connection technology, information superhighway to tradition industrialist manufacture and e-transformation's propulsion that wish to maximize productivity and administration efficiency is spread vigorously. In this paper, we wish to accomplish generation equipment's heighten stability and believability through remote monitoring and control of guard lamp system. This paper describes the design of the monitoring system for the sensing data and indirect controlling of the guard lamp system. Most of the conventional monitoring systems depend on the special hardware and software. The essential design of monitoring system is to provide the convenience for the user and the portability for the system. In order for the system to fulfill its requirements, it was designed using Labview GUI facility based on the Windows 2000 environment of IBM PC compatible and Add-oncard based on the TCP/IP protocol. Advantage of the monitoring system are a personnel expenses curtailment effect, of the place restriction and unmanned system of the generationplants, etc..

• 한국의류산업학회지
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• 제6권4호
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• pp.421-426
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• 2004

In an information-oriented and internationalized society of the future, the quality and the price of goods made by each country will be equalized. That eliminates competition. But the design and appearance of products is an important factor in international competition. Indeed, design symbolizes a country's culture visually, and it can show the cultural identity and originality of a nation in international society. And that will play an important part that can contribute to creating added value. It is necessary to revive our people's old lyrical stories which are far away from our memory, and we badly need design development to revive traditional cultural merchandise through visual modernization. In this study, I chose lotus as the subject material of textile design development. And my intention for this study is to reflect Korean traditional cultural value as much as I can, and to develop textile design of Korean images by adding modern scenes. Also, I intend to print them on fabric, and apply them to cultural merchandise including scarves and ties, by using digital textile printing systems. The reasons for doing so, are to create high added value, and to let other peoples of the world, know about our excellent culture.

• 한국가구학회지
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• 제26권4호
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• pp.383-391
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• 2015

In recent years the industry has utilized some of the 3D printers in the manufacturing process a trend which spread also a personal desktop 3D printer priced. The 3D printer can create the 3D object by using an ink or a laser instead of the powders, and various liquid plastic material. Properties of 3D printers are liquid, solid, powder and raw materials are also classified as varied. New ideas and processes in the form of designer furniture, becoming increasingly evolved through the development of materials and technologies. Science, art and technology combine to create a new aesthetic for the complex and free binding structure is a combination of design and materials are available in craft and the structure appears not showing. 3D scanning was not simply continue to develop as the production process by a variety of tools and content transformation. Create new mathematical tables and chairs designed by the theory fit the digital age shows a coupling structure with decoration into small pieces. It has created a new craft technique in the digital age.

• 디지털융복합연구
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• 제15권9호
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• pp.211-221
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• 2017

반도체 산업은 임베디드 소프트웨어를 통해 운영 통제되는 자동화설비를 통해 첨단상품을 생산한다. 반도체를 생산하는 로봇과 각종 설비의 임베디드 소프트웨어 유지보수는 제품의 품질과 신뢰성 제고를 위한 필수적인 과정으로 반도체 장비의 라이프 사이클을 고려할 때 상당히 높은 비중을 차지하는 활동영역이다. 그러나 이 분야에 대한 학술적 관심사는 그리 높지 않는데, 본 연구에서는 반도체 웨이퍼 생산장비를 구동하는 소프트웨어 관련 문제로 보고된 사건을 대상으로 502개의 데이터를 무작위 추출방식으로 수집하여 임베디드 소프트웨어의 유지보수 노력에 영향을 미치는 요인들을 분석해 보았다. 결론으로 실무적인 시사점도 제시하였다.