• Journal of the Korean Society of Propulsion Engineers
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• v.22 no.6
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• pp.94-103
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• 2018

The purpose of designing composite lattice structure which applied to launching vehicle and tactical missile body is to minimize the thickness and weight for applied load. It is usually made of carbon fiber; fabricating with filament winding process over silicon mold, and provided with a window opening for inspection purpose if necessary. In this paper compression test is conducted without window opening in lattice structure and preliminary FEA is carried out to confirm its accuracy. And then FEA is performed for the case of window opening to evaluate the soundness and the safety factor of the structure. We have calculated for two kinds of window shape; rectangular one and hexagonal one. And we have calculated safety factors of the lattice structure with window opening in every case based on failure strength of rib and knot with varying the thickness and location of the window for hexagonal shape. Through our investigation, we have found out the followings; (1) the hexagonal shaped window is shown higher safety factor than rectangular one, (2) a window in a certain location is shown higher safety factor than others, (3) although the soundness of window structure is improved as increasing its thickness, a window of a certain thickness is shown higher safety factor than others because of stress concentration.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.186-187
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• 2016

본 논문에서는 평소 사람이 접근하기 어려워 점검이 힘들었던 대형구조물에 대하여 드론을 활용한 안전점검의 활용 가능성을 기획하였으며, 지상에서 식별하기 힘들거나 육안만으로 찾기 힘든 구조물을 근접 촬영하고 열화상 카메라를 이용해 구조물의 상태를 정밀 점검하고자 한다. 국내 최초로 드론을 활용하여 정밀 안전진단에 활용 가능한지에 대한 검토와 일반 안전진단과의 차별성 및 비교를 통해 향후 드론에 미치는 영향을 검토하고자 한다.

• Journal of Digital Convergence
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• v.10 no.6
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• pp.41-47
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• 2012

These days, job creation affair is the largest national affair. Although, this government has been persevering in one's efforts, job is not created easily. One of the reasons is the problem of statistics of the job and policy errors by this wrong statistics. This article's purposes are to examine the problems of statistics of the job as base of existing policy, and to analyze the power of job creation of various industries. Especially, this study will light up job creativity of SW industry which is more important than other area in the job creation.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.16 no.2
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• pp.149-158
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• 1998

The aim of this paper is to propose the technique of the two dimensional geodetic coordinates conversion between WGS84 and Bessel spheroids by the two-dimensional affine transformation modeling based on the UTM plane coordinates without the local geoid model which is essential to three dimensional coordinates conversion. Area of approximately $25\times{11}$ square km in the city of Inchon was selected as the test area. The transformation parameters were determined using the eleven triangulation control points in test area. And then, those paraneters were applied to the fifteen cadastral control points which selected as checking points for precision checking of transformation parameters. The average and standard deviations of the absolute values of the conversion residuals of checking points in latitude/longitude and N/E(UTM) and/or x/y(TM) are $\pm0.006"$$\pm0.013"$ and $\pm{17cm/}\pm{30cm}$ respectively. Also, coefficients for 7-parameters, 3-parameters and UTM model transformation computed according as sizes of transformed area, and then the transformed characteristics of checking points according to transformation methods analyzed synthetically.hetically.

• Journal of Cadastre & Land InformatiX
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• v.49 no.1
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• pp.85-101
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• 2019

Recently, thank to the popularization of light-weight drone through the significant developments in computer technologies as well as the advanced automated procedures in photogrammetry, Unmanned Aircraft Systems have led to a growing interest in industry as a whole. Documentation, maintenance, and restoration projects of large scaled cultural property would required accurate 3D phenomenon modeling and efficient visual inspection methods. The object of this study verify on the accuracies achieved of 3D phenomenon reconstruction as well as on the validity of the preservation, maintenance and restoration of large scaled cultural property by UAS photogrammetry. The test object is cltural heritage(treasure 1324) that is the rock-carved standing Bodhisattva in Soraesan Mountain, Siheung, documented in Goryeo Period(918-1392). This standing Bodhisattva has of particular interests since it's size is largest stone Buddha carved in a rock wall and is wearing a lotus shaped crown that is decorated with arabesque patterns. The positioning accuracy of UAS photogrammetry were compared with non-target total station survey results on the check points after creating 3D phenomenal models in real world coordinates system from photos, and also the quantified informations documented by Culture Heritage Administration were compared with UAS on the bodhisattva image of thin lines. Especially, tests the validity of UAS photogrammetry as a alternative method of visual inspection methods. In particular, we examined the effectiveness of the two techniques as well as the relative fluctuation of rock surface for about 2 years through superposition analysis of 3D points cloud models produced by both UAS image analysis and ground laser scanning techniques. Comparison studies and experimental results prove the accuracy and efficient of UAS photogrammetry in 3D phenomenon modeling, maintenance and restoration for various large-sized Cultural Heritage.

• Bulletin of the Korean Space Science Society
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• 2003.10a
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• pp.20-20
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• 2003

지난 4월 28일 성공적으로 발사된 갤렉스(GALEX) 자외선우주관측위성은 초기 시험운용 및 기기점검을 성공적으로 완료하고 현재 상시관측모드에서 순조로운 관측을 계속하고 있다. 초기 영상관측결과는 발사 전 Calibration 단계에서 예측하던 것과 유사한 해상도와 S/N비를 보여주어, 연구단의 독자적인 과학임무를 포함한 대부분의 과학임무가 계획대로 수행될 수 있을 것으로 전망된다. 지금까지 관측된 결과 중, NGS(Nearby Galaxy Survey) AIS(All-sky Imaging Survey), MIS(Medium-deep Imaging Survey), DIS(Deep Imaging Survey) 및 Abell Cluster 에 대한 주요 연구결과를 발표할 예정이다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.2062-2064
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• 2008

○○양수 발전소에서 운전되고 있는 SFC에서 양수모드 운전시 간헐적으로(1회/1-3개월) 승속실패(승속실패 시점은 대략 정격속도(300RPM)의 10%인 30RPM 전,후) 사례가 발생하나 SFC 제어 창에는 Alarm이나 Trip 관련 경보가 전혀 발생되지 않는 등 비정상 운전임에도 불구하고 원인을 파악할 수 있는 관련 정보를 취득할 수 없는 상황에서 SFC를 포함하여, 관련되어 운전되는 AVR, 인터페이스 판넬 등에 대하여 정밀점검을 시행하고, 원인을 규명함과 동시에 정상화 시킨 진단 사례임.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.142-144
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• 2018

최근 기반시설의 제어시스템을 대상으로하는 악성코드와 취약점 등이 지속적으로 보고됨에 따라 기반시설의 사이버위협에 대한 긴장감 고조되고 있다. 이와 같은 최신 사이버위협들을 예방하기 위해서는 주기적인 취약점 점검 및 제거가 필수적이다. 이를 위해서는 먼저 해당 제어시스템에 대해 기 알려진 취약점 정보를 수집할 필요가 있다. 이에 본 논문에서는 공개 취약점 정보들을 활용해 제어시스템과 관계된 취약점 정보의 수집, 관리 및 활용을 위한 제어시스템 취약점 정보관리시스템의 설계 및 구축 방안용 제시하였다. 또한, 정보관리시스템 구축 시 필수디지털자산의 정보유출 사고를 예방을 위해 고려해야할 사항을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.389-392
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• 2011

본 논문은 스마트폰에서 비만도를 구하는 App을 개발하여 언제, 어디서나 본인의 비만도를 측정하여 건강관리에 활용할 수 있는 장점이 있다. 본 App은 차트로 연동이 되어 여러 인원의 그래프 비교가 가능하며, 세부적인 생체수치 필드를 추가한다면, 보다 정교한 바이오리듬까지도 측정할 수 있다. 차트의 검색창을 통해 저장된 DB를 불러들여 본인의 과거 측정데이터와 비교하여 현재 상태를 점검하는 용도로 활용 가능하며, App을 개발하는 과정을 간단한 교육과정으로 사용할 수 있다.

• Cartoon and Animation Studies
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• s.45
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• pp.147-175
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• 2016

This thesis aims to research ways for the regional balanced development of cartoon creation & production environment being centered in metropolitan area in Korean cartoon industry which has rapidly changed since 2013. As a cartoon can not only be produced with relative lower production cost comparing to those of other cultural contents industries, but also can be produced only if the minimal requirements for cartoon production is prepared, so the cartoon is a field that the decentralization can be accomplished very easily. Currently, most cartoon-relevant companies and cartoon promotion institutions are located in Seoul an Bucheon, etc. However, cartoon artists live nationwide, and even cartoon artists producing their works abroad are reached to a significant number. In some regions like Daejeon, Busan, Suncheon and Gyeongbuk (Gyeongsangbuk-do), there have been appeared full-scale movement to construct regional cartoon creation & production centers since 2015. This thesis aimed to investigate each region's movement to construct cartoon creation & production center with oversea cases, and to check how such movement could be balanced and harmonized with each region's unique features. First of all, this thesis analyzed the status quo of government's policy nurturing the cartoon industry. Korean government's cartoon-promotion policy around the axis of the Cartoon Industry's Mid.Long-Term Development Plan has been developed around the Korea Creative Content Agency and the Korea Manwha(cartoon) Contents Agency in Bucheon, but as the webtoon industry has rapidly grown up, the necessity for building a cartoon promotion institution in each region has been raised since 2015. With the establishment of 4th Cartoon Industry Mid.Long-Term Development Plan to be executed from 2019, it seems that full-scaled support framework for cartoon regional balanced development should be occupied. For the case of foreign countries, cartoon promotion institutions and relevant events have been developed around regions from early times like San-Diego, USA(Comicon), Angouleme, France(National Image Center), Kyoto (Cartoon Museum), Sakaiminato(Misuki Sigeru Road), Japan gave a lot of implications. In the section of conclusion, this study aimed to suggest the importance of and necessity for establishing a cartoon creation & production center in each region appropriately for the region's identity and characteristics with specific plans. Based on that, this thesis aimed to suggest a vision for cartoon & webtoon industry that regional creation & production system can be settled almost only in the cultural contents industry.