• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.309-310
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• 2006

This paper is about the development of surface inspection of bearing inner and outer race using machine vision. Before this system is developed, most inspections are performed by workers' naked eye. To improve both the inconvenience and incorrectness, another new tester is introduced. This system has the three sections mainly. First one is the mechanism section which transfers bearing manufactured from previous process line to the testing process in plant. Another is the inspection system which is composed of two parts: computer vision and measurement system using laser diode which inspects the defects of the bearing inner or outer race. The other is the pneumatic cylinder part controlled by Programmable Logic Controller(PLC). The system which is developed shows favorable results, and that has the advantage of convenience and correctness compared to previous system.

• Journal of the Korean Wood Science and Technology
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• 제42권2호
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• pp.193-206
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• 2014

Residual performance of old architectural wood which has been damaged was measured using Nondestructive Evaluation (NDE). The wood Pole Tester was used to assess ultrasonic velocity inside wood and drill resistance was determined using an IML-resistograph. For ultrasonic measurements squared timber and circular timber's measurements were separately conducted with 1,300 m/s as the standard ultrasonic velocity. The standard wood samples divided into two parts; a non-sound area (below the standard), and a sound area (above the standard). Furthermore, schematization of wood was compared with results naked eye observation. The drilling resistance test was performed for both length and thickness direction in wood. The internal of the drilling was set at 30 cm (length direction), 5 cm (width direction) and 30cm (thickness direction). A non-sound area was defined as that 1) amplitude is below 20% and 2) carbonization and deterioration are related.

• 한국정보통신학회논문지
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• 제16권11호
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• pp.2382-2387
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• 2012

본 논문에서는 충수염 영상 분석에 필요한 두께, 염증의 변화량 등의 자료를 객관적으로 측정할 수 있도록 하기 위해 복부 초음파 영상에서 충수염을 추출하고 분석하는 방법을 제안한다. 초음파 영상은 동일한 환경에서 영상을 촬영할 수 없기 때문에 객관적인 분석을 위해 초음파 영상을 표준화 한다. 본 논문에서 사용된 영상은 표준화된 초음파 영상을 대상으로 하였으며, 충수염 추출 과정은 사람마다 초음파 영상 결과가 다르게 나타나므로 최하단 근막을 추출한 뒤, 최하단 근막을 기준으로 충수염을 추출한다. 제안된 방법을 초음파 영상을 대상으로 실험한 결과, 제안된 충수염 추출 및 분석 방법이 측정자가 직접 충수염을 추출하고 분석하는 방법보다 효과적인 것을 확인할 수 있었다.

• 한국의류학회지
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• 제26권11호
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• pp.1627-1637
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• 2002

The objective of this study is to analyze the images of basic bodice apparel displayed on the PC monitor connected to digital camera, and to suggest a more efficient alternative method that enables the expert judge to evaluate the subject both traditional method and displayed images on the computer. Appearance evaluation has traditionally been assessed using subjective method dependent upon expertjudges' senses with the naked eye after direct observation of a living model. This research faces the new challenge focusing on the sensory evaluation of appearance for basic apparel patterns, which can overcome the space and time limitations of the traditional feet methods. A total fifteen basic bodice garment (3 types of $pattern\;{\times}\;5$ subject) were constructed with same fabrics. The appearance evaluation items consist of lg questions of upper torso. The image takes font, back and side view of the dressed subject with three different situations. Data was analyzed using percentiles, standard deviation T-test and ANOVA. Taken together, the present result of appearance evaluation through digital camera image shows that there is a significant difference ($p{\leq}.001$) in the response to the placement of the neckline, the waist & shoulder dart, the general ease of the bust & waist area, the side seam, the perpendicular of the waist hem and general acceptability between the above three different situations; the image in the condition of greenish yellow background with front light showed the highest score through all questions. These results depend on the kind of background colors with the light.

• Journal of Biosystems Engineering
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• 제32권2호
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• pp.102-108
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• 2007

Heat pump systems are recognized to be heating and cooing systems. In this study, to check the practical application possibility of heat pump systems as low temperature storage systems and get basic data, apples of a long term storage items were stored and performance of low temperature storage and quality changes of apples were evaluated. Cooling coefficient of performance of the system was from 1.1 to 1.3. Although ambient air temperature varied widely from $-13^{\circ}C$ to $29.6^{\circ}C$ during low temperature storage period from January to June, the average temperature of low temperature storage chamber was $1.1^{\circ}C$ at setting temperature of $1.5^{\circ}C$. Sucrose of apples stored by the heat pump decreased from initial sucrose of 15.4% (Brix number) to final sucrose of 14.3%. Weight loss ratio of apples was 9.7% and internal and external view of apples after low temperature storage were very satisfactory with the naked eye.

• Journal of Ginseng Research
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• 제9권2호
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• pp.256-263
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• 1985

In order to investigate the inferior factor of red ginseng quality, the contents of various chemical components, physico-chemical properties and arrangement state of ginseng cells were observed. Contents of total reducing sugar, reducing sugar, crude protein, crude fibre and specific gravity of inside white part of red ginseng were less than those of normal part. But differences in content of crude saponin, HPLC pattern of ginsenosides and reducing ability for DP P H(1,1-dipheny 1-2-picrylhydrazyl) between normal and inside white part of red ginseng were not found. The optical density of 1 water extract of normal part of red ginseng did not differ from that of inside white 1 part of red ginseng, but the visible and UV absorbance of acid hydrolyzate of normal red ginseng showed higher than those of inside white part of red ginseng. The differences in the internal color and tissue of normal and inside white part of red ginseng were easily found with naked eye, and by the microscopic fractography, the orangement state of ginseng cell in the inside white part of red ginseng was less dense than that in normal red ginseng.

• 한국인터넷방송통신학회논문지
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• 제12권1호
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• pp.83-89
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• 2012

최근 스마트폰의 보급 확대로 인해 QR 코드의 활용이 급속히 확산되고 있다. 2차원 바코드의 일종인 QR 코드는 간단한 URL이나 명함 등에 폭넓게 사용되고 있으며, 특히 기업의 홍보 수단으로 많이 사용되고 있다. QR 코드는 간단한 사진 촬영으로 정보를 획득할 수 있는 유용한 수단이지만, 한편으로는 의도적인 URL 하이재킹이나 잘못된 정보가 전달될 위험이 있다. 특히 QR 코드는 위변조되더라도 사용자가 인식하기가 거의 불가능하며, 이로 인해 개인정보가 유출되거나 악용될 가능성이 높지만 이에 대한 대책은 전무한 실정이다. 본 논문에서는 이러한 위협에 대해 분석하고 해결할 수 있는 방안을 제시하도록 한다.

• 한국환경보건학회지
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• 제30권2호
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• pp.65-70
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• 2004

Hair is based upon the skin which enroll the body of high living animals and have multiple membrane structure. This study were used rats and carried out to find out the effects of commercial permanent wave products to skin which are composed of thioglycolic acid and bases. Results were as follows. Permanent wave penetrated to 3 hours later with steady state in skins and was not significant changeable after 20hr later. In case of neutralizer with thioglycolic acid lag time and permeability coefficient in healthy skin were 3.38hr and 0.96$\mu\textrm{g}$/$\textrm{cm}^2$/hr, in old skin were 3.14hr and 0.l28$\mu\textrm{g}$/$\textrm{cm}^2$/hr, and in wounded skin were 3.08hr and 0.157$\mu\textrm{g}$/$\textrm{cm}^2$/hr. In conclusion, lag time and permeability coefficient in old skin and wounded skin were faster than healthy skin. In vivo which was studied by general time and method of permanent wave. We found out that fine rinkle and rash of skin were changeable in the case of treating with permanent wave drugs than normal skin. Also, permanent wave drugs could induced rash and eruption at the skin by the naked eye.

• Korean Chemical Engineering Research
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• 제49권4호
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• pp.393-399
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• 2011

지난 수십년 동안, 환경오염물질에 대한 광학적 전기화학적 검출 방법에 관한 다양한 연구가 진행되었다. 최근에는 저렴하고, 장치가 불필요한 육안 식별 가능한 환경색센서가 개발되고 있다. 시각적 정성분석은 대상물질에 대한 즉각적인 정보를 제공하여, 실시간 현장 분석이 가능하게 해준다. 또한 정량분석이 가능한 색센서에 대한 관심도 높아지고 있다. 환경색센서는 기상의 VOC, 액상의 중금속 분석용으로 주로 개발되고 있다. 이에 본 총설에서는 다양한 환경색센서의 활용분야를 살펴보고, 기존 색센서의 문제점을 파악한 다음 환경색센서 기술의 발전방향에 관하여 전망하였다.

• Transactions on Electrical and Electronic Materials
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• 제8권4호
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• pp.166-169
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• 2007

In applying LCD to TV application, one of the most significant factors to be improved is image sticking on the moving picture. LCD is different from CRT in the sense that it's continuous passive device, which holds images in entire frame period, while impulse type device generate image in very short time. To reduce image sticking problem related to hold type display mode, we made an experiment to drive TN-LCD like CRT. We made articulate images by turn on-off backlight, and we realized the ratio of Back Light on-off time by counting between on time and off time for video signal input during 1 frame (16.7 ms). Conventional CCFL (cold cathode fluorescent lamp) cannot follow fast on-off speed, so we evaluated new fluorescent substances of light source to improve residual light characteristic of CCFL. We realized articulate image generation similar to CRT by CCFL blinking drive and TN-LCD overdriving. As a result, reduced image sticking phenomenon was validated by naked eye and response time measurement.