• 한국해양공학회지
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• 제16권2호
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• pp.53-59
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• 2002

This paper shows the experimental results controlling the height of surface and back bead in GMAW by analyzing the unexpected gaps between base metals produced in welding and by controlling welding velocity due to the variation of the gap between base metals in thin-plate welding. The back bead behavior and burn-through in I-type butt joint $CO_2$ welding of thin mild steel are analyzed in the views of short circuit time ratio and short circuit frequency. It is shown through experimental consideration that the short circuit time ratio method is more reasonable than the short circuit frequency method in analyzing the formulation of back bead under changing the gap between base metals. Based on the these results, welding manipulator is designed so as to satisfy the bead height control in real time by measuring the short circuit time ratio. To show the effectiveness of the developed bead formulation control system, the experiment is implemented under two welding conditions such as increasing gap from 0mm to 0.8mm and gradually increasing gap from 0mm to 1.2mm. The experimental results show that the bead formulation can be controlled uniformly in spite of the variation of the gap between base metals.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2007년도 학술발표회 논문집
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• pp.1737-1741
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• 2007

강우분포형과 유역형상의 변화에 따라서 이동강우가 유출에 미치는 영향을 운동파이론을 적용하여 분석하였으며, 이동강우 분포형은 균등분포형, 전진형, 지연형, 중앙집중형을 사용하였으며, 유역형상은 신장형, 정4각형 및 장방형유역에 대하여 분석하였다. 이와 같은 형상의 유역에 대하여 다양한 이동속도를 가진 강우가 유역내 하천의 상류방향, 하류방향, 횡방향을 이동할때 유출수문곡선을 모의하여 그 특성을 비교분석하였다. 또한 총유출량을 동일하게 하기 이하여 강우강도를 변화한 경우와 강우길이를 변화한 경우의 수문곡선을 비교하였다. 강우강도를 변화시킨 경우, 모든 강우분포형에서 그리고 모든 유역형상에서 첨두유량은 강우이동속도에 따라 점차 커지고 첨두시간이 일찍 발생하여, 기저시간은 짧아 진다. 첨두시간은 상류방향과 하류방향에서는 신장형유역의 경우가 가장 길고 장방형유역이 가장 짧으며, 횡방향에서는 반대현상으로 장방형이 가장 길고 신장형이 가장 짧다. 강우길이를 변화시킨 경우, 상류방향과 하류방향에서는 신장형의 수문곡선의 변화가 가장 크고 장방향의 변화가 가장 작으나, 횡방향의 경우는 반대현상이 생기며, 모든 경우 정사각형의 이동속도에 따르는 수문곡선의 변화는 그 중간임을 알 수 있다.

• 대한건축학회논문집:계획계
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• 제35권10호
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• pp.3-10
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• 2019

The high school credit system is a system in which students select complete various subjects, depending on their career, and graduate when their accumulated credit reaches the standard. It is expected that the high school credit system, which guarantees the individual's right of choice, will bring an educational effect that can respond to the student's career aptitude. However, it is expected that problems in the aspect of school life, such as the weakening of class belongingness or difficulty of securing a stable base venue within the school building would be accompanied. This research analyzed students' usage condition depending on the living base space environment feature in schools that are implementing moving-selective class in the aspect of activity domain formation and contemplated the venue evaluation. The purpose is to provide the basic data of an architectural plan of a stable living base space within the school building through this. 'Living base center type' and 'living base dispersion type' school buildings among Japanese integral department high schools were used as the target to analyze the usage condition in the aspect of domain formation. As a result, a conclusion was deducted that student's securement of territory consciousness about the base space and venue construction for the community of various studying groups affects life satisfaction.

• 한국의류산업학회지
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• 제10권6호
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• pp.997-1005
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• 2008

The purpose of this study was to provide the available date to improve the uniform e of the woman employee of the department more aesthetical and functional on the base of the former studies on their situation of uniform wearing. The process of the study was to compare and evaluate the studied uniforms made of elastic material with the one two times after pattern amendment. The nine subjects composed of threes of 20s, 30s and 40s of age and the evaluators were 5 clothing experts. The 5 scored scale of sensory evaluation method was used to evaluate the appearance and the moving function. The data were analysed with mean and t-test. The results were as flowers: 1.The material of blouse was changed with Poly-span to improve the appearance and the moving function. 2.The new uniform got far more good evaluations in the appearance and the moving function showing the significant difference in p<.001 level. 3.The improved uniform blouse pattern was presented fig2 and fig3.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.177-178
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• 2014

This work proposes a two-dimensional (2-D) laser scanning mirror actuator with a simple structure composed of one magnet and four coils. The mirror-actuating device generates 2-D scanning motions about two orthogonal axes by combining electromagnetic actuators of the conventional moving-magnet types. The magnet is attached to back side of the mirror placed inside of the moving frame. The four coils is placed on the base frame in a cross shape. We implement a finite element analysis to calculate magnetic flux in the electromagnetic system with the overall size of $20mm(W){\times}20mm(D){\times}13mm(H)$ for the mirror size of $8mm{\times}8mm$. The each moving-magnet type electromagnetic actuator has the motor constant 3.41 mNm/A and the restoring constant 1.75 mNm/rad and the resonance frequency of 58 Hz and the bandwidth of 80 Hz. The proposed compact and simple 2-D scanning mirror predicted advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.

• 한국실내디자인학회논문집
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• 제18권1호
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• pp.89-98
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• 2009

As the quality of life Increases, most people are much interested in their health. The latest knowledge and concepts are newly employed and consistently extended in the field of medical facilities as well. The purpose of this study is to investigate space-structural features of dental clinics, to analyze space components in two aspects, the function and the moving path, to provide with base materials for interior design research, and, as a result, to contribute to the improvement of dental clinics. The visitor survey method was implemented in five dental offices haying opened since 2000. The survey results show that each area is distributed as follows; the consultation room is the largest, the waiting space is secondly largest, and the facility area of medical assistance and administration is the smallest. The consultation space can be designed as semi-opened or opened. Considering moving paths, each should not be too long for the communication between doctors and patients, and for the effective medical examination and treatment. The survey indicates medical assistants have the longest moving path because they fully utilize every space. Based on the survey results described above, more systematic in-depth studies should be performed in the future.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.567-569
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• 2006

This study proposes the method to make a map of moving environment area and passed area by sensor using for recognizing environment or avoiding obstacle. We win develop an efficient algorithm to use sensors and get the data by the user friendly system. Through this system, we win study the way to know of the driving environment of moving robot on the long distance point. To this, we use only one ultra-sonic sensor with a servo motor which rotates 180 degree and loads an ultra-sonic sensor. A sensor can measure 1m${\sim}$8m range and a servo motor can distinguish 15 degree by 12 divide of 180 degree. By this feature of operating system, the robot which has these sensor module detects around of area and moves another point. In this way, users gather the data of detecting distance and change the data to X-Y coordinates. And users derive a map from these accumulate data.

• Tribology and Lubricants
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• 제12권3호
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• pp.72-78
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• 1996

This paper was undertaken to analyze the morphology of wear debris generated from lubricated moving machine surfaces by image processing. The lubricati, ng wear test was performed under different experimental conditions using the wear test device made in our laboratory and wear test specimen of the pin on disk type wear rubbed in paraffme series base oil, by varying applied load, sliding distance. The four parameters (50% volumetric diameter, aspect, roundness and reflectivity) to describe the morphology have been developed and outlined in the paper. A system using such techniques promises to obviate the need for subjective, human interpretation of particle morphology in machine condition monitoring, thus to overcome many of the difficulties with current methods and to facilitate wider use of wear particle analysis in machine condition monitoring.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.153-154
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• 2011

In Korea, the apartment supplier should satisfy the apartment residents' demand on the defect repair found in apartment housing by the law of Management of Apartment Complexs. But in the cost of defect repair, not only the actual defect repair cost, but also the cost of residents' complains are contained. So in this analytic study, the actual use state of defect deposite during 4~10 years after moving in are analysed base on actual data of 15 apartment complexes. In this study, about 66% of defect repair deposites are used to actual defect repair and only 34% of defect repair cost are spent to satisfy the demand of apartment residents'.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.447-450
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• 2003

This paper concerns on application of active magnetic bearing(AMB) system to levitate the elevation axis of an electro-optical sight mounted on moving vehicles. In such a system. it is desirable to retain the elevation axis within the predetermined air-gap while the vehicle is moving. A disturbance compensation control is proposed to reduce the base motion response. In the consideration of the uncertainty of the system model, a filtered-x least-mean-square(FXLMS) algorithm is used to estimate adaptively the frequency response function of the feedforward control which cancels disturbance responses. The frequency response function is fitted to an optimal feedforward control. Experimental results demonstrate that the proposed control reduces the air-gap deviation to 27.7% that by feedback control alone.