• 대한교통학회지
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• 제9권2호
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• pp.135-144
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• 1991

In recent years parking problems have been rapidly highlighted. Particularly on-street parking has become a very serious problem so an immediate action needs to be taken to resolve this problem. On-steet parking is attributable not only to insufficient capacity of parking lots but also to the facts that must of the parking lots are far away from the destinations to which drivers intend to go and that their locations are unclear. The effect of on-street parking is so great as to cause road traffic problems such as traffic jam and danger to road safety as well as to lead to obstructing business activities resulting in a decline of commercial areas. Therefore on-street parking is an important problem for a city as a whole. In this paper I have investigated a parking lot information and guiding system as one of the techniques to resolve the on-street parking problem and have clarified the effect of introducing this system and necessary conditions for implementing an optimum information and guiding system. Moreover I have pointed out the problems to be encountered in imp-lementing such system in areas not equipped with infrastructures taking into account the road conditions in these areas and have stated that it would be necessary to develop a new idea of information and guiding system in order to overcome these problems. I have suggested a Shot Gun Method as a proposal and have discussed extensibility of this method in the future.

• 천문학회보
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• 제38권2호
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• pp.83.2-83.2
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• 2013

Camera for QUasars in EArly uNiverse (CQUEAN) is an optical CCD camera developed by the Center for the Exploration of the Origin of the Universe (CEOU). In 2010 August, CQUEAN was attached on the 2.1m Otto Struve Telescope at the McDonald Observatory in Texas, USA. As the main purpose of CQUEAN is detecting the Lyman breaks of redshift ~5 quasars, it is sensitive to near-infrared wavelengths (0.7-1.0 ${\mu}m$). For the auto-guiding system, it is using a rotating guide arm to find guide stars on the Cassegrain off-axis focus of the telescope. We plan to upgrade a new filter wheel system consists of a series of narrow band filters. We will install this independent auto-guiding units on the finder scope, which makes rooms on the Cassegrain focal plane of the main telescope. In this presentation we present the system architecture of the CQUEAN Auto-guiding Package (CAP).

• 수산해양교육연구
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• 제25권1호
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• pp.53-64
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• 2013

This study examined the relationships between the cognitions and strategies of child's problem behaviors depending on the level of preschool teacher's professional development. Participants were 176 preschool teachers in B Metropolitan city. The teachers completed rating scales to measure teacher's professional development, the perception of child's problem behaviors, and teacher's guiding strategies for child's problem behaviors. The collected data were analyzed using descriptive statistics, one-way ANOVA, and Pearson correlations. Results showed that there were different cognitions of child's problem behaviors depending on the level of teacher's professional development. Secondly, child's problem behavior guiding strategies by the level of teacher's professional development were significant differences in the positive prevention strategy I, II, and the positive reaction strategy. Finally, there were somewhat different relationship between the cognition of child's problem behaviors and the problem behavior guiding strategies according to the level of teacher's professional development. Findings are discussed in terms of the importance of teacher's professional development in the context of teacher's education planning for teacher's guiding strategy about preschooler's problem behavior.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 추계학술대회 논문집
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• pp.416-417
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• 2007

MmSH injection molding method to fabricate light guiding plate with nano-sized pattern was developed. A stamper was fabricated through photolithography, dry etching, and electroplating processes. While the stamper with nano-sized pattern in mold was kept at $180^{\circ}C$ during injection process, that was cooled down to $90^{\circ}C$ quickly after the injection process. The nano-sized pattern on light guiding plate processed by MmSH injection molding method was well transferred from stamper compared to that processed by conventional injection molding process.

• 수산해양교육연구
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• 제16권2호
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• pp.187-198
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• 2004

The purpose of this study is to provide the basic data to activate the operation of the volunteer activities. The specified subjects for this study are how different is it in the changes of the self-concept and the satisfaction and the intention of the continuance of volunteer activities according to the type of volunteer work and guiding organization for middle school students. For this study, 64 students, the homogeneous ability group, were intentionally assigned in the preliminary inspection of self-concept and 16 students were randomly allocated respectively for 4 groups. The consequences based on the result are as follow: First, it has more influence with the group activities than the individual on the changes in the self-concept. But, there isn't meaningful difference by each guiding organization. Therefore, the school has to provide with activating middle school student's activities by developing various weekly and monthly club volunteer activities. Second, for the satisfaction and the intention of continuance among the guiding organization, it has meaningful difference in the group activities only, not in the individual ones. It gives the ground for the government to provide intensified support to the leaders of the group and grant the incentives to the group of distinguished activities, in the perspective of developing sociality, promoting the group volunteer activities.

• The Journal of Advanced Prosthodontics
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• 제8권3호
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• pp.207-213
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• 2016

PURPOSE. A recently introduced direct drill-guiding implant surgery system features minimal tolerance of surgical instruments in the metal sleeve by using shank-modified drills and a sleeve-incorporated stereolithographic guide template. The purpose of this study was to evaluate the accuracy of this new guided surgery system in partially edentulous patients using geometric analyses. MATERIALS AND METHODS. For the study, 21 implants were placed in 11 consecutive patients using the direct drill-guiding implant surgery system. The stereolithographic surgical guide was fabricated using cone-beam computed tomography, digital scanning, computer-aided design and computer-assisted manufacturing, and additive manufacturing processes. After surgery, the positional and angular deviations between planned and placed implants were measured at the abutment level using implant-planning software. The Kruskal-Wallis test and Mann-Whitney U test were used to compare the deviations (${\alpha}=.05$). RESULTS. The mean horizontal deviations were 0.593 mm (SD 0.238) mesiodistally and 0.691 mm (SD 0.344) buccolingually. The mean vertical deviation was 0.925 mm (SD 0.376) occlusogingivally. The vertical deviation was significantly larger than the horizontal deviation (P=.018). The mean angular deviation was 2.024 degrees (SD 0.942) mesiodistally and 2.390 degrees (SD 1.142) buccolingually. CONCLUSION. The direct drill-guiding implant surgery system demonstrates high accuracy in placing implants. Use of the drill shank as the guiding component is an effective way for reducing tolerance.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2001년도 추계학술대회 논문집
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• pp.185-189
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• 2001

A study on the new active circulation type oil-water separation system including buoyancy type guidance system was carried out in this paper. Oil-water separation system is composed of several oil separation steps. Buoy type oil guiding system was developed based on the difference of buoyance of water and oil. The design speed of this vessel is 25 knots.

• 한국정밀공학회지
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• 제14권12호
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• pp.105-113
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• 1997

In this study, the forging process of spur gears has been investigated. The forging process of spur gears has been classified into two type of operations, guiding one and clamping one in this investigation. Two type forgings of spur gears have been analysed by using upper bound method. The predicted values of the forging load were compared with those obtained from the forging experiments. The forging experiments were carried out with a commercial aluminium alloy. The forged parts obtained through the guiding type forging were campared with those obtained through the clamping type forging.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 춘계학술대회 논문집
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• pp.55-56
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• 2009

A light guiding plate (LGP) with nanometer-sized patterns was fabricated by injection molding method which employed electrically healed mold and the transcription of injection-molded parts was investigated. A Ni stamper was fabricated using MEMS technology. The Ni stamper was then installed in a movable heated core which is a key part of the mold. Using this mold, injection-molded plastic LGP parts were manufactured at different mold temperatures and the effect of the temperature on the transcription of the parts was investigated.

• Journal of Astronomy and Space Sciences
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• 제24권4호
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• pp.431-450
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• 2007

천체의 장시간 노출을 위한 망원경 자동추적장치는 CCD 카메라의 성상 관측결과를 피드백하여 제어한다. 그러나 대기 시상효과에 의해 성상 관측의 정확도가 변하면 제어의 정확도도 달라진다. 본 연구에서는 제어공학에서 사용하는 이산시간 동적 이론을 적용하여 자동추적장치의 효율을 극대화 할 수 있는 이론을 개발하였다. 망원경의 추적장치에 기계적인 오차가 있는 경우, CCD 카메라의 성상 관측결과에 나타나는 대기시상 효과를 구체적으로 모델링한 후, 제안된 성능지표에 주는 영향을 수식적으로 유도하고 분석하였다. 그리고 기계적인 오차와 대기시상 값의 이론적인 상관관계를 실제 관측 실험을 수행하여 검증하였다.