• Journal of Biosystems Engineering
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• 제28권5호
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• pp.429-438
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• 2003

This study exploits the robot system which is necessary in gene study and bio-technology industry. As well, a DNA chip, which of use has been increased recently, can be manufactured with this system. The robot consists of a device spotting DNA on the silylated slide, a well plate, a bed for fixing well plates, devices of washing and drying the pin in DNA spotting .device, a distillation-water vessel, and a discharge vessel of wash water. We made the period of sticking DNA to the pin on the well plate to be 15 seconds. The spot size of DNA was set to be 0.28 mm on the average by bringing the slide into contact with pin during 1 second. If DNA is spotted in minimum space possible about 0.32mm, this system can stick about 8,100 DNA spots on the well plate with this rate. Analyzing the procedure: Movement starts, Pin washes, dries, and smears DNA on the well plate. Spotting DNA onto 12 chips took 2 minutes and 50 seconds.

• 한국산학기술학회논문지
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• 제7권4호
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• pp.531-538
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• 2006

그레이팅은 아스팔트 도로에 설치하여 배수를 할 수 있는 구조물이다. 본 논문에서는 그레이팅의 구조를 개선하여 토사의 쌓임을 방지 할 수 있는 신제품을 제안한다. 기존 제품은 프레임에 오물이 쌓여 있어 평상시 해충이나 악취가 발생하며 우천 시 배수가 원활하지 못해 물이 고이는 현상도 빈번할 뿐 아니라 역류하는 현상이 발생한다. 또한 기존 그레이팅이 프레임과 본체를 일체형으로 설치하여 파손 시 전체를 교체하여야 하는 단점이 있다. 본 연구는 그레이팅 본체와 프레임을 분리시킨 구조로 프레임을 멘 홀에 시멘트와 함께 기초공사 하여 고정한 후 그레이팅 본체는 장착탈이 가능한 구조로 개발하였다. 또한 분실 방지용 지그도 설치하여 이를 개선하였다.

• 한국의류산업학회지
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• 제4권6호
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• pp.517-523
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• 2002

This study examines whether there are differences in consumer's evaluation price zone on the clothing clue (the type of clothing, brand, time of fashion, place of origin, material. submaterial, place for sale) according to consumer purchasing behavior. Therefore the ultimate goal is to offer help in fixing price when establishing marketing of the clothing industry by grasping the actual price set by consumers under the IMP system. The female consumers of 20s and 30s were chosen as study subjects for their sensitivity to the purchase of clothing. The tests carried out in this research are: SPSSIPC+ is used for frequency Analysis. The Results of this study are showed as the following: It was analyzed that 4 types of consumer are the reasonable consumption oriented consumer, fashion oriented consumer, the no care of fashion consumer and high price oriented consumer Among the several kinds such as the type of clothing, brand, time of fashion, place of origin, material, submaterial, place for sale, only on the type of clothing, there are difference in the type of the consumers, on the time of buying clothes, in the behavior of buying clothes and also on the degree of fashion and the place of origin among such kinds.

• 재활간호학회지
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• 제17권1호
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• pp.1-9
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• 2014

Purpose: The purpose of this study was to confirm the effects of auricular acupressure therapy on insomnia and nocturia in the elderly. Methods: This study was a nonequivalent control group pre-post test design. Data collection was conducted from July 1 to August 31, 2013. Subjects were set for totally 36 people with 18 people in the experimental group and 18 people in the control group among the elderly over the age of 60 in silver town, welfare center, and senior citizen center where are located in Seoul area. For the experimental group, auricular acupressure therapy was applied two times during 5 days by fixing it to auricular reaction site with tape using Sinapis alba L. seeds. With SPSS/WIN 19.0 program, the collected data were analyzed. Results: Compared to the control group, the sleeping score and sleeping satisfaction were improved and nocturia frequency was lowered in the experimental group who applied auricular acupressure therapy. Conclusion: Auricular acupressure therapy was considered to be likely useful therapeutic method for the effects of relieving nocturia and insomnia in elderly.

• 열처리공학회지
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• 제33권6호
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• pp.277-283
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• 2020

Cu-Co-Si based alloy has a strengthening mechanism for Co₂Si intermetallic compounds deposited on the copper matrix after aging treatment and the solution treatment has a key influence on the strength and electrical conductivity of the final products. In this paper, the Cu-1.6%Co-0.38%Si alloy was fixed at the time and the solution treatment temperature was set at a temperature in the range of 800 to 950℃, and the change in mechanical properties was observed by fixing the temperature at 950℃ and changing the time. The microstructure was observed using an electron microscope and an optical microscope, and the changes in hardness, electrical conductivity, and bending workability after aging treatment were investigated. When the solution treatment time is less than 20 seconds, the solution treatment is not sufficient and the formation of precipitates contributing to the increase in hardness decreases and the hardness decreases after the aging treatment, and in more than 50 seconds, the hardness decreases due to the coarsening of the grains and the bending workability got worse.

• 한국전자파학회논문지
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• 제19권8호
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• pp.862-877
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• 2008

두 종류의 넓은 대역폭을 갖는 ring hybrids(하나는 coupled line이 포함되어 있고, 다른 하나는 left-handed transmission line을 포함한 ring hybrids)가 비교되었으며, 비교 결과로부터 coupled line을 포함한 ring hybrid가 모든 면에서 우수한 특성을 가짐을 보여줬다. 그러나, coupled line을 포함한 ring hybrid는 -3 dB coupling power를 가질 경우에 한해서만이 perfect matching이 이루어지기 때문에, perfect matching을 갖는 coupled line ring hybrid는 2차원으로 구현하기는 거의 불가능하다. 이 문제를 해결하기 위해서 coupled line을 해석했고, 그 해석 결과로부터 coupling coefficient에 관계없이 어느 경우에도 perfect matching을 이룰 수 있는 설계 식을 유도했다. 이 설계식을 이용하여, transmission line의 길이가 ${\pi}$보다 큰 경우에도 적용될 수 있는 크기를 줄이기 위한 새로운 형태의 transmission line 등가회로를 제시했다. 이 새로운 형태의 transmission line의 등가회로를 이용하면 기존의 ring hybrid의 $3\;{\lambda}/4$의 transmission line을 줄이는 데 사용할 수 있기 때문에 ring hybrid의 크기를 더욱 줄이는데 장점이 될 수 있다. 이 등가회로를 증명하기 위해서, coupling power를 고정하고 또는 transmission line의 길이를 고정하는 2가지 형태의 simulation을 하였으며, 대역폭은 coupled line의 coupling power에 직접적인 상관 관계가 있음을 보였다. 기존의 등가회로와 새로운 형태의 등가회로를 이용하여, 작고 넓은 대역폭을 가지는 ring hybrid를 제시하였다. 새로 제시된 ring hybrid를 이용하여, 기존의 ring hybrid와 비교하였다. 비교 결과로부터, 본 논문에서 제시한 ring hybrid의 전체 ring 둘레가 1/3보다 더 작음에도 불구하고, 대역폭이 훨씬 넓음을 보여줬다. 작고 넓은 대역폭을 가지는 ring hybrid를 측정했으며, 측정 결과는 -2.78 dB, -3.34 dB, -2.8 dB, -3.2 dB의 power division 특성을 보여줬으며, matching과 isolation은 20 % 이상의 대역폭에서 -20 dB보다 좋은 특성을 보여줬다.

• 대한디지털의료영상학회논문지
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• 제14권2호
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• pp.1-8
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• 2012

Purpose : We aim at presenting the optimum radiologic factor through the evaluation of dose variation and of image quality through the use of a grid in Humerus examination and the change of dose because of the change of radiologic factor. Materials and Methods : We divided it in 3 cases: when using a grid or not and when using IP(Image Plate) in a digital system. Also, as fixing kVp to 70kVp it changed mAs, and fixing mAs to 10 it changed kVp, we put up resolution chart and Burger rose phantom on the acrylic phantom of 7cm (the same level of Humerus) to evaluate the dose and image. We used Image J program to evaluate the quantitative resolution of the obtained image, and made the qualitative evaluation and statistical analysis of the image saved in PACS for 20 radiologic technologist with more than 10 years of experience in order of evaluate its contrast. We used SPSS10(SPSS Inc. Chicago, Illinois) for statistical analysis. Results : We observed the analytic result of resolution by the change of kVp that it was $4.539dGycm^2$ in 60kVp and $757.472dGycm^2$ in 75kVp, which increased about 64.6% of dose, while for the resolution it had the pixel value 30.7% better with 851 in 60kVp than 651 in 75kVp. Also, we analyzed the result of resolution by the change of mAs that it was $3.106dGycm^2$ in 5mAs, and $12.470dGycm^2$ in 20mAs, which increased about 400% of dose, while for the resolution DR had 678 in 5mAs, and 724 in 20mAs that increased about 6.8% of resolution. We made the qualitative evaluation of contrast by the change of kVp that DR showed the higher quality than CR, but the contrast by the change of kVp had no special different at the moment of visual evaluation, nor statistically significant difference(P>0.05). We observed the qualitative evaluation of contraste by the change of mAs that the contrast increased as DR increased mAs, and had statistically significant difference(P<0.05). On the other hand, CR had no significant difference for more than 10mAs nor statistically significant difference(P>0.05). Conclusion : In case of some patients with radiographic exposure by the repeated examination such as emergent patient or Follow up patient, they are considered to try to limit the use of a grid, to set kVp under 65kVp in fixed mode, to select less than 10mAs and to reduce the possibility of patient being bombed.

• 항공우주정책ㆍ법학회지
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• 제26권1호
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• pp.93-125
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• 2011

제2차 세계대전 이후 국제항공체제의 근간이 되는 1944년의 시카고협약에 의하면 국가 간 항공 운송은 양자협상체제로 규율되며, 특히 운임은 IATA의 운임설정기구를 통한 항공사간 협의와 관련국 정부의 인가로 운영되고 있다. 항공 운임은 여객, 수하물 및 우편물을 제외한 화물의 운송에 대해 부과되는 가격과 그 가격의 가용성 및 사용을 지배하는 조건이다. 전통적인 양자협정이 질서 있고 원만한 항공 시장의 발전에 주안점을 두고 있는 반면 자유화협정 체제는 운임의 자유 경쟁을 비롯하여 가능한 한 모든 규제를 철폐하고 있다. 또한 EU를 비롯한 지역적인 블록은 역내 항공자유화를 추구하고 있다. 한편 자유화와는 별개로 전 세계적인 차원에서 자원의 효율적인 활용과 파괴적인 경쟁으로 초래되는 시장의 독과점 상태를 방지하기 위하여 항공사간 다양한 형태의 협력(합병 및 인수, 공동 운항, 운임협의, CRS, 지상조업 등)이 추구되고 있다. 이들 자유화를 지향하는 국가에서는 항공 운임을 포함한 항공사간 협력이 경쟁을 저해함으로써 소비자 후생에 반하는지 여부를 판단하여 반독점 면제(antitrust immunity)를 부여할 것인가를 결정하고 있다. 운임을 비롯한 항공사간 협력이 항공사간 공정한 경쟁을 유지하고 소비자 이익을 증진할 경우 반독점 면제를 부여하고 있다. 면제의 허용 여부는 관련 국가와의 원만한 관계 등을 종합적으로 고려하여 신중하게 결정하여야 한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1066-1069
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• 2004

Recently the monitoring system of tool setup in high speed precision machining tool is required for manufacturing products that have highly complex and small shape, high precision and high function. It is very important to reduce time to setup tool in order to improve the machining precision and productivity and to protect the breakage of cutting tool as the shape of product is smaller and more complex. Generally, the combination of errors that geometrical clamping error of fixing tool at the spindle of machining center and the asynchronized error of driving mechanism causes that the run-out of tool reaches to 3∼20 times of the thickness of cutting chip. And also the run-out is occurred by the misalignment between axis of tool shank and axis of spindle and spindle bearing in high speed rotation. Generally, high speed machining is considered when the rotating speed is more than 8,000 rpm. At that time, the life time of tool is reduced to about 50％ and the roughness of machining surface is worse as the run-out is increased to 10 micron. The life time of tool could be increased by making monitoring of tool-setting easy, quick and precise in high speed machining center. This means the consumption of tool is much more reduced. And also it reduces the manufacturing cost and increases the productivity by reducing the tool-setup time of operator. In this study, in order to establish the concept of tool-setting monitoring the measuring method of the geometrical error of tool system is studied when the spindle is stopped. And also the measuring method of run-out, dynamic error of tool system, is studied when the spindle is rotated in 8,000 ∼ 60,000 rpm. The dynamic phenomena of tool-setup is analyzed by implementing the monitoring system of rotating tool system and the noncontact measuring system of micro displacement in high speed.

• 한국화재소방학회논문지
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• 제30권6호
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• pp.92-98
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• 2016

본 논문은 Charge-Coupled Device (CCD) 카메라를 이용한 열화상의 실시간 추정과 화재경보에 대하여 논한 것으로 각도 및 위치에 따른 특징점 분석과 동일 형상의 벡터 성분 좌표점 설정에 따른 이미지 융합이 잘 되었다. 영상을 Display하는 픽셀의 데이터 값은 0~255, 센서 출력값은 0~5,000로 하여 정확성이 높았다. 시험결과 시험체로부터 500 m, 1000 m, 1500 m 거리에서 화염에 의한 시험체의 작동시간은 각각 7초, 26초, 62초 소요 되었고 화면이미지 생성이 효과적으로 이루어졌다. 화재 발생 진단은 주의/경보/화재의 3단계로 프로그램하여 Alarm의 순차적 동작과 SNS 전송이 이루어졌다. 비화재보시험을 위해 백열등, 형광등에 대해 시험하였으나 모두 비화재보를 발생하지 않았다. 시간대별 화염의 변화영상과 진행방향 및 확산속도의 분석은 화재진행상황 예측이나 열화상 실시간 추정과 경보로 비화재보 감소가 가능함을 확인하였다.