• 공학교육연구
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• 제10권3호
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• pp.64-78
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• 2007

영어 논문의 작성 능력은 오늘날 공학도들에게 필수적으로 요구되는 자질이다. 주요 해외 저널에 얼마나 많은 논문이 게재되었느냐가 학문적 성과를 평가하는 주된 척도라는 점과 주요 해외 저널들이 보다 많은 독자들을 대상으로 하기 위하여 영어로 쓰여진다는 점 때문에 영어 논문 작성 능력에 대한 필요성은 한국을 포함한 영어가 모국어가 아닌 모든 국가들에서 강조되고 있는 실정이다. 그러나, 불행히도 한국에 있는 이공계 대학들은 석/박사 연구원들의 영어 논문 작성 능력 향상을 위한 정규적인 교육 과정을 제공하고 있지 못하다. 이러한 상황을 더욱 악화시키는 것은 구체적인 기술 논문 작성 방법론에 대한 문헌이 부족하다는 점이다. 원어민(Native Speaker)을 위한 기술 논문 작성 방법론에 대한 문헌이나 EFL 학습자들을 위한 일반적인 영어 작문법에 대한 문헌은 많이 있지만, EFL 학습자들을 위한 기술 논문 작성법에 대한 지침서나 문헌은 찾기 힘들다. 따라서, 본 보고서의 목적은 두 가지로 나누어 볼 수 있다. 첫째, 영문 기술 논문 작성에 대한 교육 방법론이 생소한 한국에서 이공계 연구원을 대상으로 강의를 하고 있는 EFL 강사들에게 제기될 수 있는 일반적인 논제들을 제시한다. 이 논제들은 적절한 강의 접근법(Teaching Approach), 최적의 학생 배치(Class Arrangement), 그리고 컴퓨터 학습 도구의 활용뿐 아니라 대조 수사학(Contrastive Rhetoric)의 중요성에 대한 내용을 포함한다. 둘째, 실제적인 강의 제안서도 제시한다. 본 강의 제안서는 기술 논문 작성법 강의 수강생들의 작문 샘플에 대한 분석 결과와 기술 논문 작성법에 대한 자가 진단 설문 응답 분석 결과를 근거로 작성하였고, 한국인 EFL 학습자가 기술 논문 교육 과정을 통하여 문법(Grammar), 과정(Process), 장르 기술(Genre Skills) 등을 골고루 개발할 수 있도록 하였다. 본 보고서는 EFL 기술 논문 과정의 개발에 대한 여러 일반적인 논점들을 공유함으로써 기술논문 교육방법론 연구가 부족한 한국의 공학 교육계에 하나의 사례를 제시하였다.

• 전기학회논문지
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• 제59권1호
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• pp.33-39
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• 2010

In order to operate the power system satisfactory for both system operators and customers, it is important to limit the harmonic currents to the allowable levels which injected into the system from the distorting installations. In this regard, the principles for the allocation of emission limits on individual customer were introduced in the technical report of IEC61000-3-6. According to these general principles, the emission limits are dependent on the agreed power of the customer, the power of the harmonic-generating equipment, and the system characteristics. The considerations in this report are very comprehensive and the process introduced is practical enough to implement as it is. However, there is a fact not appropriately dealing in the report that could be a very tickle but has a huge impact on determining the emission limit. This is the effect of non-harmonic load currents. More precisely, these are from the equipments which do not emit any harmonic or may emit harmonics but this specific order under the consideration by themselves if the source power is sinusoidal. The load currents originated from these equipments have an effect of active filter against the specific order of harmonic therefore, these should be dealt as a significant factoron the process of determining the emission limits for individual customer.

• 오토저널
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• 제11권5호
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• pp.1-12
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• 1989

This short report describes the trend of exhaust emission control of the diesel engine vehicles in Korea, which originally was motivated from the newly proposed Emission Control Regulation of Diesel Engine Vehicles possible to be activated in 1991 by Korean Environmental Protection Agency. This short survey report has been prepared by the special working group of The Korea Society of Automotive Engineers (KSAE) on this particular subject. This report includes (1) estimation of portions of contribution of diesel engine vehicle emission to total air pollution, (2) comparison of proposals of new articles/regulations/laws in Korea with those of other selected countries such as USA, European countries, and Japan, (3) comparison of vehical emission control regulations in Korea with those in other selected countries, (4) technical aspects of possibilities of reduction of diesel engine vehicle emissions, (5) additional administrational aspects of technology development program, (6) social impact resulted from the severe emission control regulation on diesel engine vehicles, and (7) proposals, prepared by the special working group of the KSAE, on the emission control regulation of diesel engine vehicles, which can possibly bring better cleaner air released from the air pollution resulted from diesel engine exhaust emissions in real sense with minimal financial contribution, with optimal technological efforts, with less social impacts, within five to ten year period.

• 한국정밀공학회지
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• 제30권11호
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• pp.1129-1137
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• 2013

We report a centerless grinding machine which can perform multi-function with 600 mm wide grinding wheels. By increasing manufacturing area, long workpiece such as camshaft and steering shaft, is allowed to grind more quickly, compared with cylindrical grinding system. In this paper, the design of centerless grinding machine puts emphasis on symmetry to exploit the thermal stability. Results of finite element analysis shows that the difference of the structural deflection in the front and rear guideways is less than $1.5{\mu}m$ due to symmetric design. The difference is less than $3.0{\mu}m$, even though the thermal deformation is considered. According to the performance evaluation, the radial error motion of the G/W spindle, which is measured by applying Donaldson Ball Reversal, is about 1.1${\mu}m$. The yaw error of the G/W slide is improved from 2.1 arcsec to 0.5 arcsec by readjusting the slide preload and ball screw.

• 대한소아치과학회지
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• 제26권2호
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• pp.240-247
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• 1999

치아우식증, 외상, 발육성 결함으로 광범위한 수복이 필요한 유전치의 치료는 소아치과의사에게 있어 매우 까다로운 문제이다. 이상적인 수복술식은 강도, 내구성, 심미성과 장착의 효율성을 모두 갖추어야 한다. 이에 행동조절문제가 있는 어린이를 치료하는 기술적 문제를 더하면, 여러 가능한 수복 방법 중에서 적절한 술식을 선택하는 것은 어려운 일이다. 현재 사용되는 수복술식에는 복합레진의 접착을 사용한 celluloid strip crown, conventional stainless steel crown, open-faced stainless steel crown, commercially 및 chairside veneered stainless steel crown과 epoxy-coated stainless steel crown 등이 있다. 이 모든 술식이 나름대로의 기술적, 기능적 또는 심미적 단점을 갖고 있어 각각의 효율적이고 효과적인 사용을 위해서는 적절한 선택이 중요하다. 이에 저자는 이러한 여러 가지의 전장피개수복 방법을 사용해 유전치를 치료하여 그 결과를 보고하는 바이다.

• Imaging Science in Dentistry
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• 제52권3호
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• pp.303-308
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• 2022

Purpose: This technical report aims to describe and detail the use of micro-computed tomography for a reliable evaluation of the bulk-fill composite/tooth interface. Materials and Methods: Bulk-fill composite restorations in tooth cavities were scanned using micro-computed tomography to obtain qualitatively and quantitatively valuable information. Two-dimensional information was processed using specific algorithms, and ultimately a 3-dimensional (3D) specimen reconstruction was generated. The 3D rendering allowed the visualization of voids inside bulk-fill composite materials and provided quantitative measurements. The 3D analysis software VG Studio MAX was used to perform image analysis and assess gap formation within the tooth-restoration interface. In particular, to evaluate internal adaptation, the Defect Analysis addon module of VG Studio Max was used. Results: The data, obtained with the processing software, highlighted the presence and the shape of gaps in different colours, representing the volume of porosity within a chromatic scale in which each colour quantitatively represents a well-defined volume. Conclusion: Micro-computed tomography makes it possible to obtain several quantitative parameters, providing fundamental information on defect shape and complexity. However, this technique has the limit of not discriminating materials without radiopacity and with low or no filler content, such as dental adhesives, and hence, they are difficult to visualise through software reconstruction.

• 대한정형외과학회지
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• 제56권2호
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• pp.183-189
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• 2021

슬관절 고정술은 슬관절이 손상되어 재건술을 시행할 수 없는 환자에서 안정적이고 통증이 없는 슬관절을 얻을 수 있는 마지막 선택사항 중 하나이다. 슬관절 고정술에는 외고정 장치, 압박 금속판을 이용한 내고정, 조립형 금속정 또는 이상와로부터 삽입하는 전향적 금속정을 이용한 내고정 등 다양한 방법들이 사용되어 왔다. 다른 선택사항으로 Neff 정, Wichita 정, 또는 Huckstep 정과 같은 짧은 금속정을 이용하기도 한다. 그러나 한국에서는 현재 사용 가능한 상용화된 짧은 금속정이 없다. 이에 저자들은 역행성 대퇴부 골수강 내 금속정을 이용한 슬관절 고정술을 보고하고자 한다.

• 항공우주기술
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• 제13권2호
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• pp.87-98
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• 2014

일반적으로 위성 영상자료 품질에 대한 요구조건 값과 사용자 측면에서의 품질사이에는 바라보는 시각에 따른 기술적인 차이가 존재한다. 실제로 아리랑위성 3호도 2012년 12월31일에 검보정 작업이 완료되어 영상자료 품질 요구조건 값들을 모두 만족하여 정상운영을 시작하였지만, 아리랑위성 3호를 위한 사용자 측면의 영상자료 품질을 별도로 정의하여 관리하고, 필요에 따라 추가 검보정 작업을 수행하고 있다. 검보정팀과 자료처리팀에서는 아리랑위성 3호 영상자료 품질보고서를 작성하여, 처리시스템에서 생성되는 영상자료의 품질을 판단하여 관리하고 있으며, 그 중에서 영상자료 품질을 저하시키는 5개의 추가 검보정 항목을 선정하였고, 현재 추가 검보정 작업을 완료하여 처리시스템에 추가하는 작업을 진행 중이다.

• 한국환경복원기술학회지
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• 제12권5호
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• pp.121-132
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• 2009

The agency which is responsible for work related to the restoration of vegetation on the quarry in Hong Kong is the Geotechnical Engineering Office of Civil Engineering and Development Department (CEDD). CEDD's environmental management system was certified as ISO 14001 : 2004 in 2006 and diverse instructions and technical documents about the restoration of the quarry were published and used for the performance of work and the implementation of the project. The restoration of the quarry is being carried out to respond to short-term and long-term goals. The general instructions for the restoration of vegetation says that a plant, when selected, should be self-sustainable with minimum maintenance required, have a high growth and survival rate, be tall enough to cover the rock slope faces, and preferably produce colourful flowers. These instructions prescribe the vegetation introduction technology, planting seasons, structural material of the vegetation works, maintenance and management, tree nursery operation, means of water supply, etc. This report introduced the outline of work on restoring vegetation carried out at Anderson Road, Shek O, Lam Tei, Turret Hill, Lamma, all large-sized quarries. In addition, it additzed Anderson Road's master plan. It is hoped that the Hong Kong examples so introduced are referred to in terms of institutional and technical considerations related to the nation's project for restoring quarries.

• 펄프종이기술
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• 제36권3호
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• pp.52-59
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• 2004

The greater Increase of the demand for environmental friendly materials especially for packaging industry leads to the larger interest in the reusable and recycable materials such as pulp mold. Although the pulp mold has great characteristics for packaging, some deficiency compared with other packaging material like EPS(Expandable Polystyrene) need to be overcome, for example, the relative higher cost. In this report, since the water drainage rate at the forming zone of a wet pulp mold process could have a great influence on the economical efficiency not only by increasing machine speed but also reducing the drying energy, the optimum ways for increasing drainage were investigated The mechanism of vacuum drainage In pulp mold forming was successfully evaluated by using RDA(Retention and Darinage Analyzer). Since the conditions of stock were greatly affected by the pulping time of low consistency pulper, the optimum pupling time was investigated with considerations of all stock preparation processes. The change of stock temperature and the addition of polyelectrolyte could improve the vacuum drainage rate. It was founded that the wire mesh types of mold former had a little influence on the retention because of the relatively mild vacuum drainage. However, the bigger size of dewatering hole showed better drainage rate and could reduce the plugging and con lamination of mold.