• 품질경영학회지
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• 제42권2호
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• pp.145-152
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• 2014

Purpose: As the number of people directly employed in making things declines, the cost of labour as a proportion of the cost of production and delivery will diminish too. This will make to move the focus of quality management because new manufacturing techniques make it cheaper and faster to respond to changing local tastes Methods: This discussion is induced by understanding that change the point of view of quality. Results: Mark-processing method using a mold of 3D-printer is different from traditional manufacturing methods. Design, rapid prototyping of products produced by the right way, many changes in many industries will be created. Therefore, the design will be more emphasis on the importance of quality. Conclusion: As manufacturing goes digital, a Quality great change is now gathering pace. It will allow things to be made economically in much smaller numbers, more flexibly and with a much lower input of labour, thanks to new materials, completely new processes such as 3D printing. So we must change the vantage point of quality, from process to Design, R&D, and Delivery.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권3호
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• pp.154-164
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• 2022

Understanding temporal variations in wildlife populations is a prerequisite for conservation planning of wide-ranging species such as tigers (Panthera tigris). We determined the temporal variation in abundance, population growth, and sex ratios at different age and sex stages for a tiger population in Ranthambhore Tiger Reserve, India from November 2007 to February 2011 using motion-sensing cameras. We identified 19 male and 21 female tigers from stripe patterns during 16,110 trap nights within an area covering 233 km². The annual abundance of the population varied from 34.9 (mean)±3.8 (SE) to 23.9±1.5, with a declining trend in the mean annual change of abundance (-12%). The density of adult females remained stable across the study duration, but the densities of adult males and non-breeding tigers fluctuated. The sex ratio was female-biased (0.58 males/female) for breeding tigers and male-biased (1.74 males/female) for non-breeding tigers. Our results reinforce the importance of long-term studies for monitoring the naturally occurring processes in populations to develop population indicators and identify reliable baseline information for conservation and management planning of populations.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.3-8
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• 2004

This study describes the validation of the GPS/Levelling using GPS data that were obtained from three Permanent GPS stations of the Jeju island. Each orthometric height of three Permanent GPS stations was calculated from the Bench mark of levelling with Traverse-survey and relative baseline processing The test result shows that the error of closure of orthometric height was about 1.6cm and one of ellipsoidal height was about 1.5cm. This result represents that the geoidal height and undulations are regular in the Jeju island. According to the test results, it is identified that one can calculate the orthometric height using Permanent GPS station data rather than traditional levelling method which has a some complexity especially in Jeju island.

• 한국자기학회지
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• 제6권3호
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• pp.174-178
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• 1996

광자기 디스크 드라이브의 광학계로부터 검출 신호와 잡음을 시뮬레이션하는 방법을 연구하였다. 기록된 표식과 입사되는 레이저 빔 형태를 간단한 모델을 사용하여 기술하고 각각을 이산화시켜 재생 신호의 크기와 파형을 시륨레이션 하였다. 이렇게 시뮬레이션된 재생 신호에 Gaussian 램덤 잡음을 부가하고 일차원 이산 FFT(Fast Fourier Transform) 알고리즘을 수행하여 신호와 잡음 스펙트럼을 추정하였다. 또한 이로부터 CNR(Carrier to Noise Ratio) 값을 구하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.32-35
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• 1997

A recent development in the Flat Panel Display(FPD) industry requires an auto-alignment system which is operated in high speed and high precision. In the FPD production process, aligning photo-mask with respect to guide mark printed in the glass should be accomplished in the accuracy of sub-micron order. So the system has high bandwidth and needs a dedicated control system which is fast and robust enough to control linear motors in precise manner. Proposed auto-alignment system structure in this presentation which consists of the master controller board, the DSP position controller board which controls 3 axis precision linear motors, the servo system and the man machine interface software. Designed and tuned under repeated experiments, the proposed system showed a reasonable performance in the aspect of rise time and steady state error.

• 설비공학논문집
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• 제3권2호
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• pp.97-102
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• 1991

Finite element method has been developed recently for the solution of the convection-diffusion problems. Finite element method has several advantages over finite difference method, but its requirement of the larger memory size of the computer has prevented from wide application. In the present study, line-by-line technique has been implemented to finite element method to overcome this disadvantage. Two dimensional laminar natural convection in square cavity was chosen as an example in this study. The numerical result shows good agreement with bench mark solution and the size of the coefficient marix has been reduced drastically.

• 한국표면공학회지
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• 제28권5호
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• pp.300-308
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• 1995

The effect of nitrogen finishing for the control of coating weight in a nitrogen sealing box on the coating surface property in hot dip galvanizing process has been studied. The coated surface is free of oxide marks and edge overcoated. The coating uniformity is excellent ; the standard deviation of the coating thickness along width of the specimen was $1~1.2\mu\textrm{m}$ in the box whereas $2.5~3\mu\textrm{m}$ in the air. Considering surface quality of the coating such as oxide mark, edge overcoated and zinc dust, the oxygen content between 40 and 200 ppm was suggested in the box in addition the oxygen content of at least 40 ppm or the minimum dew point of $-27^{\circ}C$ is required to prevent a zinc vaporization.

• 한국문헌정보학회지
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• 제20권
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• pp.473-491
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• 1991

Summarizing the conclusion of this article is following this: 1. Donginjimun-ouchil(동인지문오칠) published at the close of Koryo, is not only the oldest anthology but also the only one of the same kinds that we have in present. 2. Donginjimun-ouchil is consist of 9 Kweons. We can know the fact through comparing samhansiguegam(삼한시구감), becouse it seems to summerize Donginjimun-ouchil. 3. Donginjimun-ouchil is different from other books and espically has a speial features which in eluding profils about the characters. 4. With additional punctuation marks in profile and critiism marks, we can know the rule of punctuation mark and at the same time it can give many assistances to the study of poetics.

• 디자인학연구
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• 제19권3호
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• pp.71-92
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• 2006

People have their own cultural backgrounds and experiences in terms of visual perceptional thinking so that they could misunderstand the cultural symbols, trademarks, Brand Identities, and trade characters, especially, animal trademarks. Sometimes Easterners and Westerners seem to not comprehend the different meanings of the cultural symbols. The signs of twelve Chinese zodiac animals are the typical symbol of the Asian mythology. What I wanted to focus on emphasizing the different views and perspective of an animal trademark is according to the Chinese Zodiac between Eastern and Western cultures. Generally, multiple symbolisms are difficult to comprehend, because they are created by individual ideas and incorporate several mythologies and histories. How do Westerners interpret the implied meaning of Eastern animals in general? How are they going to understand the Eastern animal logos or marks accurately? How can we solve the problem to make people understand their different meanings? There were some confusing pictorial images in the area of the design field when a designer creates an animal mark for globalization and localization. Creating of hybrid symbol is the best way to break the communication barriers with people all around the world.

• 대한전기학회논문지:시스템및제어부문D
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• 제51권3호
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• pp.108-111
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• 2002

This paper proposes an new water mark embedding and extraction technique which extends the direct sequence spread spectrum technique. The proposed technique approximates the complexity of image and block in spatial domain using Laplacian filtering and watermark is adaptively embedded in the mid-frequency DCT components. Local parity bits are attached to higher-frequency DCT components and they are used to detect extraction errors and correct those errors. In extraction process the proposed method boosts the higher frequency components of image and extracts the watermark by demodulation and this information is verified and adjusted by parity bits. Experimental results show it is invisible and robust to several external attacks.