식품가공부산물의 젖소 TMR 활용방안

김청운 충남대학교 농과대학 2007 논문집 Vol.- No.13

국가 표준도를 이용한 토목 구조물 BIM 파라메트릭 라이브러리 구축에 관한 연구

김청운,구본상,Kim, Cheong-Woon,Koo, Bonsang 한국건설관리학회 2014 한국건설관리학회 논문집 Vol.15 No.4

토목 분야 Building Information Modeling(BIM) 활성화를 위해 시급한 과제 중에 하나가 토목 구조물에 대한 라이브러리(Library)의 구축이다. 라이브러리의 구축을 통해 BIM 모델링의 시간을 단축할 수 뿐 아니라, 정확한 물량산출과 표준화된 모델의 공유가 가능해진다. 그러나, 건축분야에 비해 국내 토목 구조물에 대한 표준화된 라이브러리는 매우 부족한 실정이다. 본 연구에서는 국토교통부에서 제공하는 2차원 표준도를 기반으로 옹벽 및 암거 구조물을 라이브러리로 구축하였다. 상용 BIM 소프웨어를 사용하여 각각 구조물에 형상과 철근을 모델링하는 방법을 적용하였으며, 특히 라이브러리를 재활용하고 범용적으로 쓸 수 있기 위한 치수 및 물량 파라미터들을 정의하는데 주력하였다. 구축된 라이브러리를 실제 사업에 투입했을 경우, 정확하고 신속한 물량산출이 가능하고 형상정보가 1개의 라이브러리로 통합 관리되어 기존 2D 도면에 비해 관리가 용이하다는 것을 파악 할 수 있다. 또한 콘크리트 형상을 파라미터의 조정으로 쉽게 바꿀 수 있다는 것을 알 수 있다. 그러나, 철근의 경우에는 형상 파라미터를 조정함에 따라 스트럽 및 겹이음 철근의 조정이 제대로 되지 않아 아직까지는 수동으로 물량을 조정해야 하는 한계점이 있다. 본 연구의 결과를 통해 토목구조물은 비정형적이고 개별 사업에 따라 단품적으로 생산되기에 라이브러리의 구축이 어렵다는 인식에서 벗어나 국내 토목 시설물 기준 및 시방서에 따른 꾸준한 라이브러리 추적을 통해 BIM 적용 확산을 앞당길 수 있을 것으로 판단된다. Development of infrastructure component libraries is a critical requirement for the accelerated adoption of BIM in the civil engineering sector. Libraries reduce the time for BIM model creation, allows accurate quantity take offs, and shared use of standard models in a project. However, such libraries are currently in very short supply in the domestic infrastructure domain. This research introduces library components for retaining walls and box culverts generated from 2D standard drawings made publicly available by MOLIT. Commercial BIM software was used to create the concrete geometry and rebar, and dimensional/volumetric parameters were defined to maximize the reuse and generality of the libraries. Use of the these libraries in a project context demonstrates that they allow accurate and quick quantity take offs, and easier management of geometric information through the use of a single library as to numerous 2D drawings. It also demonstrates the easy modification of the geometries of the components if and when they need to changed. However, the application also showed that some of the rebar components (stirrups and length wise rebars) do not get properly updated when concrete geometries are changed, demonstrating the limits of current software applications. The research provides evidence of the many advantages of using BIM libraries in the civil engineering, thus providing the incentive for further development of standard libraries and promoting the use of BIM in infrastructure projects.

십이지(十二支)의 상징적 의미체계를 활용한 남성장신구 디자인 연구 -벨트와 부토니에르를 중심으로-

김청운(Chung woon Kim) 아시아민족조형학회 2020 아시아민족조형학보 Vol.21 No.-

The leading male consumers purchasing accessories in modern society spend money based on the value of brands and temporary trend regardless of taste and perspective. It can be a kind of psychological phenomenon and since it is possible to express group identity and sense of belonging as one of functions of accessory, it should not be understood as a unique function of male accessory. Also, in terms of designs in male accessories, a tendency and characteristics that signify the formats and style led the brand logo and geometric lines as the main expression, demonstrating the limited number of designs. Through this, it was confirmed that ‘zodiac sign culture’ can be applied into accessories for males to improve their personalities and show where they belong with expressing individual personality; the study was performed based on that. Peoples check their age group through ‘zodiac sign culture’ and express their co-working relationship while representing their emotional beings. This ‘zodiac sign’ culture phenomenon from a long time ago has been rooted deeply within not only Formative field but also in daily lives, affecting directly and indirectly on the general society and culture carrying ethnic emotion. Such cultural phenomenon is based on ‘Twelve Branches’, divided into rat, cow, tiger, rabbit, dragon, snake, horse, sheep, monkey, chicken, dog and pig, representing each animal. Also, each image from different characteristic can be used as a means to pursue improvement of characters. After that, the symbolic expression was analyzed and the abstract meaning of 12 animals was visually created to establish a symbolic meaning system. Representations determined from the design motif were combined into belts and boutonniere for designing. Materials and manufacturing methods for expressions and symbols were combined for production. after, captions and reviews were written, selected representations from symbolic semantic system were mainly described. Various suggestions attained from the current research are expected to be continued to a new research for producing practical accessories with new design having individual expressive concept revealing oneself.

과산화수소(H2O2) 농도와 탈색시간이 모발의 손상에 미치는 영향

김청운 ( Chung Wun Kim ),양진희 ( Jin Hee Yang ),김애순 ( Ae Soon Kim ) 한국미용학회 2007 한국미용학회지 Vol.13 No.2

A bleaching agent which is extensively used to decorate appearance affects deeply the health of a hair. The aim of this study is to investigate a damage of a bleaching agent on a healthy hair. In order to evaluate an influence of a bleaching agent the healthy hair was treated with various concentrations of a bleaching agent and several handling times, and then the morphological and physical changes of the hair was investigated by SEM (scanning electron microscope) and UTM (universal testing maching). The tensile strength of virgin hair treated with a bleaching agent depended on the concentration of hydrogen peroxide and the handling times. When the concentration of hydrogen peroxide and the handling times was increased, the tensile strength of the hair was increased and on the other hand, the tensile strain was decreased. After the bleaching process, also, the color difference of the hair significantly showed up. The virgin hair observed by SEM was covered with the healthy cuticle which forms the outer surface of the hair. But, the bleached hair was swelled and the cuticles of the hair were down intermediately. The swelling of the hair and the breaks of the cuticles was dependently increased by the concentration of hydrogen peroxide and the handling times. When the bleaching of the hairs was achieved with various treatment times and concentrations of the bleaching agents, the damages of the hairs were occurred to the minimum at 3% of the bleaching agent for 10min treatment time. In the treatments to enhance the value of brightness of hairs, the damages of the hairs were minimized when they were treated with 9% of the bleaching agent for 10 min of treatment time. Consequently, the bleaching treatment impairs the healthy hair in abundance. Therefore, the prudence in the use of the bleaching agents should be asked for the beauty and health of the hair.

탈색시간과 과산화수소 농도에 의한 모발의 손상

김청운(Chung Wun Kim),전홍성(Hong Sung Chun) 한국생활과학회 2005 한국생활과학회지 Vol.14 No.3

자이로센서를 활용한 도난 방지 스마트 헬멧 구현

김청운(Chung Woon Kim),박상현(Sang Hyun Park),윤준식(Jun Sik Yoon),이동현(Dong Hyeon Lee),김수민(Su Min Kim),홍기남(Ki Nam Hong),김영형(Young Hyung Kim) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6

3D스캔 · 프린팅을 이용한 모형제작 및 공예분야 활용연구

김청운(Kim, Cheong woon) 아시아민족조형학회 2023 아시아민족조형학보 Vol.24 No.-

This study explores the potential applications of 3D scanning and printing in various craft fields within the context of the Fourth Industrial Revolution. The research involves three main steps: predicting utility in traditional, craft, and creative fields; examining commercialized 3D scanners and printers; and conducting actual scanning and printing tests. The findings indicate two significant possibilities: first, near-perfect measurements are achievable with home 3D scanners, enabling easy replication of objects; second, data on shape, color, and pattern can be preserved and modified for creative purposes. These confirm the potential for “craft and creative usability” in traditional fields. The study envisions broader applications beyond large institutions, aiming to democratize these technologies for individual works and creative activities. Overall, the research demonstrates the viability of 3D scanning and printing for diverse applications, from individual projects to national initiatives and large museums.

최초 발견자 차이와 관련된 간헐외사시 특징

김청운(Chung Woon Kim),김승우(Seung Woo Kim),유재은(Jaeeun Yu),정승아(Seung Ah Chung) 대한안과학회 2022 대한안과학회지 Vol.63 No.11

목적: 수술이 필요한 정도의 간헐외사시를 처음 발견한 사람이 안과의사인 군과 부모를 비롯한 비전문가인 군에서 간헐외사시 특징이다른지 알아보고자 하였다. 대상과 방법: 평균 5.9 ± 1.4세에 20프리즘디옵터(prism diopters, PD) 이상의 간헐외사시로 진단받은 환아 218명의 의무기록을 후향적으로 조사하였다. 간헐외사시 최초 발견자가 안과의사인 군과 비전문가인 군으로 나누어, 프리즘교대가림검사로 측정한 실제사시각과 반투명가리개로 가리고 촬영한 사진을 바탕으로 전문의 2명이 평가한 사진사시각, 간헐외사시 분류, 융합조절, 입체시, 억제, 구면렌즈대응치를 비교하였다. 결과: 평균 원거리사시각이 25.8 ± 6.8 PD인 간헐외사시를 41명(18.8%)은 안과의사가, 177명(81.2%)은 비전문가가 처음 발견하였다. 사시안의 구면렌즈대응치가 안과의사군에서 비전문가군에 비해 근시인 것(-0.77 ± 1.59 디옵터[diopters, D] vs. -0.19 ± 1.48 D, p=0.03)을 제외하고는 두 군 간 차이가 없었다. 두 군에서 나이와 사시안의 구면렌즈대응치를 짝지은 39쌍을 비교하면, 안과의사군에서 원거리, 근거리 실제사시각이 비전문가군에 비해 작았지만(24.0 ± 6.8 PD vs. 28.5 ± 6.4 PD, 26.9 ± 6.6 PD vs. 31.0 ± 6.4 PD, p<0.01), 사진사시각을 비롯한 다른 특징은 차이가 없었다. 결론: 수술이 필요한 정도의 간헐외사시라도 사시각이 작거나 근시가 동반된 경우 안과의사가 검진을 통해 처음 발견하는 경우가 많았다. Purpose: To determine whether the clinical features of intermittent exotropia (IXT) needing muscle surgery were different in the ophthalmologist-detected and non-specialist-detected groups (including parents). Methods: Medical records of 218 children (mean age: 5.9 ± 1.4 years) with IXT of ≥ 20 prism diopters (PD) were reviewed retrospectively. The angles of deviation were measured using the prism and alternate cover test and assessed by two ophthalmologists using photographs with a translucent occluder (photographic angle). The IXT subtype, fusional control, stereopsis, suppression, and spherical equivalent (SE) were compared between the ophthalmologist-detected and non-specialist-detected groups. Results: Mean 25.8 ± 6.8 PD of distant angle of IXT was first detected by the ophthalmologist in 41 patients (18.8%) and the non-specialists in 177 patients (81.2%). The deviated eye was more myopic in the ophthalmologist-detected than non-specialist- detected group (-0.77 ± 1.59 diopters [D] vs. -0.19 ± 1.48 D, p = 0.03). There were no other differences between the two groups. A comparison of 39 age- and non-dominant eye SE-matched pairs demonstrated that the measured angles for distant and near fixation were smaller in the ophthalmologist-detected than non-specialist-detected group (24.0 ± 6.8 PD vs. 28.5 ± 6.4 PD and 26.9 ± 6.6 PD vs. 31.0 ± 6.4 PD, respectively, p < 0.01), while the remaining characteristics, including the photographic angle, were similar. Conclusions: In cases with small angles of deviation or myopia, IXT with angles requiring surgical correction were commonly first detected by ophthalmologists during examinations.

이항옵션가격 모형을 활용한 CER 판매전략 구축과 이를 통한 CDM 사업 수익성 향상 방안에 관한 연구

구본상,박종호,김청운,Koo, Bonsang,Park, Jong-Ho,Kim, Cheong-Woon 한국건설관리학회 2014 한국건설관리학회 논문집 Vol.15 No.1

The Clean Development Mechanism (CDM) allows New & Renewable Energy projects to make additional income by selling CER's, which represent the amount of Green House Gases(GHG) that is reduced in the project. However, forward contracts used to hedge fluctuating market prices does not allow projects to sell CER's at a premium. As an alternate approach to maximize CER revenue, CER's are modeled as a 'real option', in which CER's are sold only above the desired sales price. Using the Binomial Option Pricing model, the resultant lattices are used to determine whether to sell, defer or abandon the option at individual nodes. Overlaying Pascal's Triangle on the lattices also enabled the calculation of the annual probabilities for deferring CER sales without incurring downside losses. Application to an actual Landfill Gas project showed increased overall NPV, and that CER sales could be deferred at a maximum of 2 years. The proposed framework allows transparency in the analysis and provides valuable and strategical information when making investment decisions related to CER sales of CDM projects. 청정개발체제(Clean Development Mechanism, CDM)사업은 온실가스 배출을 줄이는 대신 그에 상응하는 탄소배출권(Certified Emission Reductions, CER)의 판매를 통해 추가 수입을 얻는 대표적인 신재생에너지 사업 보조 수단이다. 그러나 선물계약으로 고정된 가격에 CER을 판매할 경우 손실위험은 피할 수 있으나 CER 가격 상승에 따르는 프리미엄 혜택은 받지 못한다. 본 연구에서는 CER 매출을 극대화하기 위한 방안으로 CER이 일정 가격이상 일 경우에만 판매하는 권한을 실물옵션으로 모델링하였다. 옵션 가치를 정량화하기 위해 이항옵션 가격 모형을 활용하였으며, 생성된 라티스를 통해 예상되는 CER의 시장가격에 따라 옵션의 행사, 지연 및 포기여부의 절점별 분석을 가능케 하였다. 더불어, '파스칼의 트라이앵글' 원리를 적용하여, 손실은 피하면서 CER 판매를 지연시킬 수 있는 연도별 확률을 구할 수 있는 방안을 정립하였다. 이를 실제 국내 CDM 사업 중 매립가스 사업에 적용해 본 결과, 옵션으로 인해 사업의 NPV가 증대되었고, 최대 3년까지 CER 판매를 지연해도 손해를 보지 않는 것으로 관측되었다. 본 연구에서 제시한 프레임워크는 분석과정에서 투명성을 제공하고 NPV분석 외에 추가적인 사업성 정보를 제공하여 CER 판매 전략에 관한 중요한 투자 의사결정 정보를 제시해 준다.

정보보호 및 개인정보보호 관리체계(ISMS-P) 인증제도의 현황과 전망

최훈(Choi, Hun),김청운(Kim, Chung-woon),이유빈(Lee, Yu-bin) 한국콘텐츠학회 2022 한국콘텐츠학회 종합학술대회 논문집 Vol.2022 No.7