• 한국산학기술학회논문지
• /
• 제10권10호
• /
• pp.2551-2556
• /
• 2009

링 레이저 자이로스콥의 주 동작은 폐경로 내의 상대 전파에 대한 위상 차에 의존한다. 공명 블록위에 설치 된 반사경들이 순항 파를 형성한다. 따라서, 공명 블록의 차원 정확도가 빔의 순항 경로에 영향을 미친다. 링의 공진 내에서 안정된 광학 빔 경로를 유지하기 위해서 피에조로 구동되는 이동거울이 공명 블록의 열팽창이나 기계적 변형하에서 경로치 제어를 하고자 선택되었다. 이 논문에서는 피에조 구동 거울의 탄성거동에 대한 수학적 설명을 제시하였다. 이 설명은 피에조 구동 거울의 개념 설계에도 적용될 수 있다.

• 천문학회보
• /
• 제37권1호
• /
• pp.76.2-76.2
• /
• 2012

The understanding spectral characterization of possible earth-like extra solar planets has generated wide interested in astronomy and space science. The technical central issue in observation of exoplanet is deconvolution of the temporally and disk-averaged spectra of the exoplanets. The earth model based on atmospheric radiative transfer method has been studied in recent years for solutions of characterization of earthlike exoplanet. In this study, we report on the current progress of the new method of 3D earth model as a habitable exoplanet. The computational model has 3 components 1) the sun model, 2) an integrated earth BRDF (Bi-directional Reflectance Distribution Function) model (Atmosphere, Land and Ocean) and 3) instrument model combined in ray tracing computation. The ray characteristics such as radiative power and direction are altered as they experience reflection, refraction, transmission, absorption and scattering from encountering with each all of optical surfaces. The Land BRDF characteristics are defined by the semi-empirical "parametric-kernel-method" from POLDER missions from CNES. The ocean BRDF is defined for sea-ice cap structure and for the sea water optical model, considering sun-glint scattering. The input cloud-free atmosphere model consists of 1 layers with vertical profiles of absorption and aerosol scattering combined Rayleigh scattering and its input characteristics using the NEWS product in NASA data and spectral SMARTS from NREL and 6SV from Vermote E. The trial simulation runs result in phase dependent disk-averaged spectra and light-curves of a virtual exoplanet using 3D earth model.

• 한국수학교육학회지시리즈A:수학교육
• /
• 제53권4호
• /
• pp.509-524
• /
• 2014

This study was to investigate the types of errors and the frequency of errors to understand students' solving process on the descriptive items with the students of an excellent high school which located in a non-leveling local school district of Gyunggi Province. All 11 items were developed in the equation of a circle and 120 students who attended this high school participated in solving them. The result showed a tendency as follows: Logically invalid inference(Type A, 38.83%) of errors, Omission error of the problem solving process(Type B, 25%), Technical error(Type C, 15.67%), Wrong conclusion(Type D, 11.94%), Use of wrong theorem(Type E, 5.97%), and Use of wrong picture(Type F, 2.61%). The logically invalid inference the students showed with a largest tendency was made because of the lack of reflection. This meant that this error could be corrected in a little treatment of carefulness.

• Journal of Advanced Marine Engineering and Technology
• /
• 제36권4호
• /
• pp.520-526
• /
• 2012

전파통신의 수요 증가 및 통신 시스템의 발달과 더불어, 인접국가간의 전파간섭은 중요한 문제로 부각되고 있다. 이러한 문제는 미묘한 것이므로 명확한 기술적 근거를 가지고 대처해야 한다. 우리나라의 경우, 일본 해안지역에 위치한 기지국에 의한 남해안 TRS 서비스에 전파간섭이 발생하며, 인접국가 간의 전파간섭 문제가 중요하게 부각되었다. 따라서 본 논문에서는 일본에서 한국으로 유입되는 전파를 측정 분석하여, 대책방안을 마련하였다.

• 한국과학교육학회지
• /
• 제25권1호
• /
• pp.41-56
• /
• 2005

Assessing students' knowledge can be a challenging endeavor, as researchers attempt to capture the full complexity and potential development of children's ideas. In this study, the Dynamic Science Assessment (DSA) method (Magnusson, Templin, and Boyle, 1997) was employed to investigate 9-12 year old students' understandings of light, while engaging in multiple tasks with a flashlight with various reflectors and mirrors. The results showed that DSA was effective in providing an opportunity to establish a Zone of Proximal Development, in addition to diagnosing a student's prior understanding. Throughout the interview, a student showed a conceptual model of light as being a solid single entity whose shape can be determined by the shape of the casing of a flashlight. However, as DSA provided phenomena that could not be explained by his unitary model, the student began to re-examine his original conceptual model, and attempted to revise it. This study addressed how Dynamic Science Assessment can help us better understand, not only students' current state of understanding, but also a potential development of understanding in their ZPD. In that sense, this study argues that we should pay more attention to the instructive role of classroom assessment that can promote and support further development of students' deeper understandings.

• 한국인터넷방송통신학회논문지
• /
• 제18권4호
• /
• pp.205-210
• /
• 2018

이글은 웨어러블 기술을 두 가지 측면에서 고찰하였다. 첫째, 스마트 기술이 접목된 옷에 스며든 욕망이다. 둘째, 옷을 입은 이용자를 바라보는 시선에 대한 고찰이다. 이 글은 웨어러블 기술로 새롭게 등장할 옷에 대한 연구이다. 그러나 이 옷은 단순히 기술적인 문제가 아니다. 오히려, 옷에 대한 인간 본능을 고려한 시스템 설계이다. 따라서 이 연구는 사회과학적 경계를 아우른다. 이 글은 웨어러블에서 수집된 데이터가 단순한 센싱 기반의 데이터라 보지 않는다. 오히려, 웨어러블 기술은 인간 고유의 생명활동과 감정을 드러낸다. 이글은 인문학과 기술을 융합 또는 복합한 시도이다.

• 한국실내디자인학회논문집
• /
• 제37호
• /
• pp.3-11
• /
• 2003

The study Is Intended to investigate and analyze the system and practice that have been applied to Interior Architecture, comparing with a number of similar foreign cases, in an attempt to seek the way toward its development as well as to come up with the solution for enhancing the competitiveness, thereby making a recommendation on how to create the desirable work environment of Interior Architecture down the road. The conclusion and recommendation we have made is highlighted as follow. Among the practical or procedural challenges in the process of improving work environment of Interior Architecture, development of current national technical qualification system in a way of further detailing the categories of Ki-sul-sa(highest engineer grade) or Ki-neung-jang(highest technician grade) as part of measures aimed at gradual approaching for improvement of design fees and rates or supervision fees will be very crucial, that calls for close coordination with the Ministry of Labor and Human Resources Development Service of Korea. In a bid to upgrade the Interior Architecture to become the part of knowledge-based industry, amendment to Korean Standard Industrial Classification along with Standard Classification of Occupations and Academic Classification will be essential, and moreover with the attitude of reflection and self-improvement, the endeavors to be able to deal with the revision of existing laws and regulations in a consistent way and manner, by forming a joint committee among the three Interior Architecture-related organizations(KOSID, ICC, KlID), will be more than important.

• 한국실내디자인학회논문집
• /
• 제17권4호
• /
• pp.58-65
• /
• 2008

The purpose of this study is to explore the revealing corporality in Mies' architecture. The character of such technical materials refuses or weakens the physical reality of the wall by the thoughts concerning the unlimited space or continuous space in Modern architecture. The wall or facade revealed visually is substituted to substance without materiality or just disappeared. This causes a problem of perception of architectural form itself in Modern architecture. Leonardo suggested that all kinds of human perception happens within the visibility and touchability. Likewise, the corporality as a visual reality can be perceived as an important and fundamental value, which can measure the real being. In this respect, This study reviews his architectural meaning by tracing the visual reality in his works. Namely, the emphasis of architectural elements through the relief effect, the expression of massiveness through the reflection of the glass wall and the emphasis of the color through the contrast are interpreted in the intention of Mies to emphasize the visual corporality of the building. This study is to reevaluate the meaning of Mies's architecture through understanding of his thought about the architectural corporality, which has been forgotten by the transparency concept of Modern architecture.

• Applied Science and Convergence Technology
• /
• 제26권6호
• /
• pp.208-213
• /
• 2017

Flexible opto-electronic devices are developed on the insulating layer deposited stainless steel (STS) substrates. The silicon dioxide ($SiO_2$) material as the diffusion barrier of Fe and Cr atoms in addition to the electrical insulation between the electronic device and STS is processed using the plasma enhanced chemical vapor deposition method. Noble silver (Ag) films of approximately 100 nm thickness have been formed on $SiO_2$ deposited STS substrates by E-beam evaporation technique. The films then were annealed at $650^{\circ}C$ for 20 min using the rapid thermal annealing (RTA) technique. It was investigated the variation of the surface morphology due to the interaction between Ag films and $SiO_2$ layers after the RTA treatment. The results showed the movement of Si atoms in silver film from $SiO_2$. In addition, the structural investigation of Ag annealed at $650^{\circ}C$ indicated that the Ag film has the material property of p-type semiconductor and the bandgap of approximately 1 eV. Also, the films annealed at $650^{\circ}C$ showed reflection with sinusoidal oscillations due to optical interference of multiple reflections originated from films and substrate surfaces. Such changes can be attributed to both formation of $SiO_2$ on Ag film surface and agglomeration of silver film between particles due to annealing.

• 대한공업교육학회지
• /
• 제35권2호
• /
• pp.82-111
• /
• 2010

이 연구는 산학(기업 공고) 연계 맞춤형 인력양성 프로그램(이하 '맞춤과정')을 수료하고 입직하여 2년 정도 근무한 수료근로자 3명을 인터뷰하여 그들의 취업 후 습숙경험을 분석한 것이다. 연구자는 2008년 선행된 경력설계 연구를 기반으로 초기습숙의 과정을 의존적 근로자에서 독립적 근로자로 이행하는 단계로 보고, 맞춤과정 수료근로자가 현장에 배치된 이후 약 2년간 어떤 습숙경험을 하는지에 초점을 두고 면담하고, 그 내용을 분석하였다. 분석결과는 다음과 같다. 첫째, 기업이 신입자의 습숙을 돕기 위해 실시하는 안내 및 교육으로서는 회사의 역사 및 현황, 근무수칙, 안전 등을 담은 신입사원 교육, 여러 작업 실무현장의 '맛 보이기', 사수-조수관계 맺어주기, 매뉴얼 및 직무기준 제시 등이었다. 이는 '통과의례' 같은 것으로서 습숙의 기본적인 디딤돌이 된다. 둘째, 습숙을 이끌어가는 상호작용과 자기성찰로서 구조화되어 있는 질책, 구성원간 유대, 경험의 누적과 성찰을 통한 깊은 학습 등이 있었다. 공식적 조치에 의해 안면을 익힌 신입자는 선임자의 질책을 받으며 상당기간(1-2년) 험난한 인고의 과정을 거쳐 질책을 받지 않고 스스로 일을 할 수 있는 수준에 이른다. 수직적 위계질서보다 수평적 유대가 강조되는 조직에서는 쉽게 경험을 공유한다. 그리고 제보자는 자신의 경험을 돌아보아 적응하기, 조직에서 살아남기, 발견한 기술을 함께 공유하고 성장하기와 같은 것을 학습하였다. 셋째, 습숙에 장애가 되는 환경 여건으로는 신입자의 습숙에 대한 숙련자의 경계, 장시간 근로와 여유시간의 결핍, 저임금 등이 있었다. 일반적으로 숙련자들은 신입자에게 경계의식을 갖고 자신이 가지고 있는 암묵지를 노출시키려고 하지 않는다. 그러나 수평적 유대가 강조되는 조직에서는 서로 쉽게 기술을 공유한다. 단순 기술과 저임금의 기업특수기술도 습숙동기를 유발하지 못한다. 연구결과는 맞춤과정 개발시 협약기업이 제시하는 직무뿐 아니라 그 직무수행자들을 위한 습숙지원제도 및 과정 등에 대해서도 분석하여 반영해야 함을 시사한다.