• 천문학회보
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• 제43권2호
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• pp.59.1-59.1
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• 2018

SNe light curves have been used to understand the expansion history of the universe, and a lot of efforts have gone into understanding the overall shape of the radioactively powered light curve. However, we still have little direct observational evidence for the theorized SN progenitor systems. Recent studies suggest that the light curve of a supernova shortly after its explosion (< 1 day) contains valuable information about its progenitor system and can be used to set a limit on the progenitor size, R*. In order to catch the early light curve of SNe explosion and understand SNe progenitors, we are performing a ~8hr interval monitoring survey of nearby galaxies (d < 50 Mpc) with 1-m class telescopes around the world. Through this survey, we expect to catch the very early precursor emission as faint as R=21 mag (~0.1 Rsun for the progenitor). In this poster, we outline this project, and provide updates on IMSNG projects during 2017/2018 seasons.

• 창의정보문화연구
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• 제6권3호
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• pp.199-207
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• 2020

본 연구에서는 컴퓨터공학 분야에서 SW 개발 중심의 프로젝트 수행을 위한 캡스톤디자인 교과목 운영의 사례를 제시하고 해당 사례를 통한 3-Tier 캡스톤디자인 모델을 제안한다. 최근 공학계열의 학과들이 대부분 캡스톤디자인 수업을 운영하고 있으나 많은 경우 졸업학년도에 캡스톤디자인 교과목을 운영하는 것이 일반적이다. 이러한 캡스톤디자인 교과목을 수강하는 학생들의 경우 팀 프로젝트 수업 운영에 따른 협업과정과 함께 실제 코딩을 하고 구현을 하는 과정에서도 애로사항을 겪고 있지만 이러한 어려움 이전에 구현 가능한 아이디어의 도출과 검증 및 아이디어의 구체화 과정에서 더 많은 어려움을 보이고 있다. 본 연구에서는 효율적인 캡스톤디자인의 운영과 성과 창출을 위해 졸업학년도 이전 2학기에 학생과 교수, 산업체 인사의 멘토가 함께 진행하는 아이디어톤 경진대회 등을 통해 아이디어 도출 및 구체화 과정을 거치고 졸업학년도 1학기와 2학기에 거쳐 해당 아디이어의 고도화와 도출된 아이디어의 실제 구현 및 구현에 대한 고도화를 진행할 수 있는 3-Tier 캡스톤디자인 모델을 제안한다.

• Smart Structures and Systems
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• 제29권1호
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• pp.251-266
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• 2022

Structural Health Monitoring (SHM) of critical infrastructure comprises a major pillar of maintenance management, shielding public safety and economic sustainability. Although SHM is usually associated with data-driven metrics and thresholds, expert judgement is essential, especially in cases where erroneous predictions can bear casualties or substantial economic loss. Considering that visual inspections are time consuming and potentially subjective, artificial-intelligence tools may be leveraged in order to minimize the inspection effort and provide objective outcomes. In this context, timely detection of sensor malfunctioning is crucial in preventing inaccurate assessment and false alarms. The present work introduces a sensor-fault detection and interpretation framework, based on the well-established support-vector machine scheme for anomaly detection, combined with a coalitional game-theory approach. The proposed framework is implemented in two datasets, provided along the 1st International Project Competition for Structural Health Monitoring (IPC-SHM 2020), comprising acceleration and cable-load measurements from two real cable-stayed bridges. The results demonstrate good predictive performance and highlight the potential for seamless adaption of the algorithm to intrinsically different data domains. For the first time, the term "decision trajectories", originating from the field of cognitive sciences, is introduced and applied in the context of SHM. This provides an intuitive and comprehensive illustration of the impact of individual features, along with an elaboration on feature dependencies that drive individual model predictions. Overall, the proposed framework provides an easy-to-train, application-agnostic and interpretable anomaly detector, which can be integrated into the preprocessing part of various SHM and condition-monitoring applications, offering a first screening of the sensor health prior to further analysis.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.353-360
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• 2022

Due to the dense and complicated working environment, the construction industry is susceptible to many accidents. Worker's fall is a severe problem at the construction site, including falling into holes or openings because of the inadequate coverings as per the safety rules. During the construction or demolition of a building, openings and holes are formed in the floors and roofs. Many workers neglect to cover openings for ease of work while being aware of the risks of holes, openings, and gaps at heights. However, there are safety rules for worker safety; the holes and openings must be covered to prevent falls. The safety inspector typically examines it by visiting the construction site, which is time-consuming and requires safety manager efforts. Therefore, this study presented a worker-driven approach (the worker is involved in the reporting process) to facilitate safety managers by developing integrated computer vision and inertia sensors-based mobile applications to identify openings. The TensorFlow framework is used to design Convolutional Neural Network (CNN); the designed CNN is trained on a custom dataset for binary class openings and covered and deployed on an android smartphone. When an application captures an image, the device also extracts the accelerometer values to determine the inclination in parallel with the classification task of the device to predict the final output as floor (openings/ covered), wall (openings/covered), and roof (openings / covered). The proposed worker-driven approach will be extended with other case scenarios at the construction site.

• 한국농촌건축학회논문집
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• 제24권1호
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• pp.19-26
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• 2022

In rural areas, changes in the agricultural structure began to appear as the vulnerable class increased due to a decrease in population such as a decrease in fertility and aging, and the elderly were unable to engage in agriculture. The number of farmers and farmers is steadily decreasing, and the elderly population living in rural areas is steadily increasing. Rural houses are left empty due to the moving, hospitalization, and death of the elderly population. The purpose of this study aims to present the current status of vacant houses in rural areas, problems of vacant houses policy in rural areas, and improvement plans. The purpose of this study aims to analyze the population status and aging of rural areas, and to present a plan to improve the trend of vacant houses with cities and the problems of vacant house policies. This study was conducted in the following process. First, the definition of vacant houses in rural areas should be redefined. Second, it is necessary to analyze the causes of vacant houses in rural areas and plan the use of vacant houses linked to them.Third, the management system of vacant houses in rural areas should be clear.

• 한국콘텐츠학회논문지
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• 제22권5호
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• pp.685-696
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• 2022

본 연구는 향후 디자이너의 업무 역량에 매우 중대한 역할을 하게 될 데이터 문해력 확보를 위하여 디자인 대학 교과과정에서의 데이터 문해력 관련 교육목표와 교과 구성, 교육 내용을 연구하였다. 연구의 방법은 먼저 비전공자를 위한 데이터 문해력 교육의 사례들과 디자인 실무 현장의 데이터 기술 활용 현황을 살펴보았고, 현장 직무 중심 디자인 역량에 대한 선행 연구와 디자인 프로세스 모델을 바탕으로 디자인 분야에서 요구되는 데이터 관련 전공 능력을 도출하였다. 그리고 NCS에 기반한 빅데이터 기획과 분석 분야의 교육 내용을 조사하여, 디자인 전공 능력에 필요한 데이터 기술 관련 교과 내용을 연계하여 디자이너를 위한 데이터 문해력 교육 모듈을 3단계의 디자인-데이터 융합 교과 모델로 구성하였다. 개발된 융합 교과 모델을 바탕으로 필요한 단위 교과목과 강의 계획, 과목 간 연계 구조를 개발하였으며, 초, 중급 수준의 디자인-데이터 융합 교과목을 운영한 사례 연구를 통하여 교육모델의 교육 내용과 교육 성과를 검증하였다. 그리고 교과 운영 사례 연구의 발견 점들을 바탕으로 디자이너를 위한 데이터 문해력 교육의 구체적 실천 방안을 제시하고, 사례 연구의 한계를 명시하였다.

• 천문학회보
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• 제46권2호
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• pp.76.3-77
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• 2021

GMT secondary mirror system consists of 7 segmented adaptive mirrors. Each segment consists of a thin shell mirror, actuators and a reference body. The thin shell has a few millimeters of thickness so that it can be easily bent by push and pull force of actuators to compensate the wavefront disturbance of light due to air turbulence. The one end of actuator is supported by the reference body and the other end is adapted to this thin shell. One of critical role of the reference body is to provide the reference surface for the thin shell actuators. Therefore, the reference body is one of key components to succeed in development of GMT ASM. Recently, Korea Research Institute of Standards and Science (KRISS) and University of Arizona (UA) has signed a contract that they will cooperate to develop the first set of off-axis reference body for GMT ASM. This project started August 2021 and will be finished in Dec. 2022. The reference body has total 675 holes to accommodate actuators and 144 pockets for lightweighting. The rear surface has a curved rib shape with radius of curvature of 4387 mm with offset of 128.32mm. Since this reference body is placed just above the thin shell so that the front surface shape needs to be close to that of thin shell. The front surface has a concave off-axis asphere, of which radius of curvature is 4165.99 mm and off-axis distance is about 1088 mm. The material is Zerodur CTE class 1 (CTE=0.05 ppm/oC) from SCHOTT. All the actuator holes and pockets are machined normal to the front surface. It is a very complex challenging optical elements that involves sophisticated machining process as well as accurate metrology. After finishing the fabrication of reference body in KRISS, it will be shipped to UA for final touches and finally sent to Adoptica in Italy, in early 2023. This paper presets the development plan for the GMT ASM Reference Body and relevant fabrication and metrology plans.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.592-593
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• 2021

지난해 7월, 대통령 주재 한국판 뉴딜 국민보고대회를 개최하여 그 핵심 전략으로 「한국판 뉴딜 종합계획」을 발표하였고, 교육 분야에서는 '그린스마트 미래학교' 사업이 한국판 뉴딜 10대 대표과제 중하나로 포함되었다. 그리고 작년 한해 COVID-19로 인한 비대면 수업 확산으로 일선 교육현장의 ICT기술의 요구가 빠르게 급증하였다. 따라서 본 논문에서는 과거 교실의 무선네트워크 및 유선 인프라의 문제점을 고찰하고 이후 비대면 수업 및 대면 수업시 사용가능한 초고속 무선네트워크를 보유한 그린 스마트 교실을 위한 유선네트워크 인프라와 무선 네트워크 장비들을 설계하고 실제 교실에 구축하기위한 예시를 제시하였다.

• 한국비블리아학회지
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• 제18권2호
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• pp.203-228
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• 2007

본 연구는 한 중 양국 대학교 학부생들의 도서관에 대한 인식수준 측정을 통해서 도서관의 성장과 발전에 장애요인이 되는 현안 문제를 규명하고 이에 대한 대응방안을 제시하기 위한 목적으로 수행되었다. 연구방법은 질문지기법을 사용하였다. 연구결과 도서관의 사회 및 문화적 기능에 대한 학부생들의 인식이 저조한 것으로 나타나 인식제고를 위한 도서관 문화행사를 강화시켜야 할 필요성이 있으며, 중국 학생들에 비해 한국 학생들의 학구열이 매우 낮고 아예 도서관을 찾지 않는 학생들이 많은 것으로 나타나 교과학습의 강도를 높이거나 도서관의 활용도를 높이는 유인정책이 필요하다. 또한 정보서비스에 대한 이용자의 만족제고 및 활성화를 위한 전문사서의 계속교육과 이용자에 대한 집단 및 그룹별 이용자 교육의 강화 도서관 이용을 통한 수업연계방안 프로젝트 등의 대응방안이 확립되어야 할 것이다.

• 영어영문학
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• 제56권5호
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• pp.973-998
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• 2010

This paper aims at assessing the significance of Lyrical Ballads of 1798, the agreed inaugurator of English Romanticism, in terms of such key concepts as poetic "experiments," "conversation," and the authorial function. The 1798 volume marks an interesting incidence in which an author with no tangible substantiality can wield his authorial function over his works. The volume is signed without the named proper noun-its author is neither William Wordsworth nor Samuel Taylor Coleridge. The figure of the author in this case is realized by the poems he writes; he produces, and is produced by, his works-a fact that constitutes part of the poetic experiments manifested in the Advertisement. Working under this reciprocal production, the Author of the 1798 volume and his poems are collectively aiming at establishing a new class of poetry and an interpretive community. The notion of "conversation" is a key element in the thematic, stylistic ties among individual poems. Poems of the 1798 volume effect multi-layered, "blended" voices. Readers are expected to draw out the topological interweaving among poems through the practices of dialogic reading. In this light, the sequential necessity of "The Rime" and "Tintern Abbey" should be emphasized. They are stitched together in a logic of textual placement and the transition from one to the other is never arbitrary. Most of all, they are working under the same authorial function, complementing each other, and addressing the same poetic project in different textual locations. As an inaugural work of English Romanticism, Lyrical Ballads of 1798 in fact makes so many things happen and yet again anticipates something yet to come with elusiveness. The value of this poetic experiments should be judged not only by what is claimed in it, but what it sets out to do and "how far" it will be performed, as implied in the Advertisement. The efficacy of the volume, more than anything else, is dependent upon the performative power of words.