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황진하 한국전산구조공학회 1994 전산구조공학 Vol.7 No.3
구조최적화 분야는 작게 보면 구조공학의 한 분야에 불과하지만 그것이 지향하는 목표가 보다 근원적이고 원대한 것일 뿐만 아니라, 설계 자체가 복잡하고 다양한 선택과 결정의 과정인 터에, 세부대상이나 접근방법에 따라 여러가지 부 영역을 포괄하는 방대한 연구 영역을 이루고 있다. 크게 대상으로 보아 단면, 기하, 또는 형상과 위상 최적화 등으로 나눌 수 있고, 보다 상급과제로 그들을 통합하는 배치최적화 등이 있다. 다른 한편으로 방법이나 도구로써 각종 수치계산 알고리즘 및 민감도해석과 함께 CAD나 EXPERT SYSTEMS 등을 활용하는 방법 등이 활발히 연구되고 있는 바, 여기서는 구조시스템이 하나의 대규모 공학시스템이라는 본질적 측면에 입각, 복잡한 대형구조시스템의 최적화를 위한 기본이론과 방법을 다루어 보고자 한다.
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遮光이 葡萄 Campbell Early 品種의 生育에 미치는 影響
黃珍夏,陳英旭 順天大學校 農業科學硏究所 1992 農業科學硏究 Vol.6 No.-
In order to study the effects of shading on the growth and development in grape Campbell Early, three shading time (two weeks before full bloom, full bloom, two weeks after full bloom) and different shading levels (0%, 15%, 35%, 50%, 70%) were treated ; The shoot growth(shoot length, diameter, and leaf length, width, area) were reduced as the shading time and levels were earlier and more intensity. the cluster growth had a similar trend. The fresh weight, cluster weight of berries, vertical diameter and soluble solid were decreased when shading time and levels were earlier and more intensity, but the acidity was increased. The rate of berry setting at the treatment of two weeks after full bloom or 15percent shading was higher than of that other treatments, with averaged values of 46.7% and 57.3%, respectively. The values above 35 percent shading plots were half of the control. The Chlorophyll content at the treatment of two weeks before full bloom or 35 percent shading was slightly higher than that of other treatments, but the values were not different among treatments. The nitrogen content was increased as earlier time and more intensity of shading, but the amount of K, Ca, Mg and Fe were decreased.
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황진하,권기혁,유혜란 국가유산방재학회 2023 문화재방재학회 논문집 Vol.8 No.3
Wooden Cultural Heritage should be preserved and managed in the original form securing the structural stability while it is being repaired or reinforced due to aging for their long existence. Currently, there is a lack of basic data to propose the criteria for when the wooden cultural heritage should be repaired. For the recent preservation of cultural properties, HBIM is used to input the repair history based on the information and repair data of the targeted cultural heritage, and it would be used for the purpose of repair and preservation of the heritage in the future. This study aims to select items to prepare standards for the maintenance of traditional wooden cultural heritage based on the load transmission mechanism of traditional wooden structures along with the safety management guidelines in the Cultural Heritage Protection Act and use them as the basic data for the future cultural heritage conservation management system.
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황진하,서병수 한국반도체디스플레이기술학회 2007 반도체디스플레이기술학회지 Vol.6 No.1
A design of experiments was applied in order to investigate the effect of processing variables in UV irradiation on the electrical/optical properties in indium-zinc oxide thin films, The processing variables, equivalently input variables are listed as UV irradiation time, oxygen flow rate, and chamber pressure. The statistical significance of Ultra Violet (UV) treatment was confirmed using a paired-t test. The full factorial 23 design was employed to determine significant main and interaction effects in UV irradiation process. The chamber pressure and the interaction between UV irradiation time and O2 flow rate were found to be statistically significant at the significance level of 0.1. Furthermore, the optimized approach was proposed in achieving the improved conductivity after UV irradiation.Key words Indium-zinc oxides, UV irradiation, Electrical/Optical Properties, Design of experiments
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HBIM을 활용한 훼철된 “환구단 석고각” 주요부재별 복원 및 수리 방법
황진하,권기혁,손창일 국가유산방재학회 2024 문화재방재학회 논문집 Vol.9 No.2
본 연구에서는 대한제국 시기 환구단에 건립되어 2차례의 이건 이후 훼철된 대표적인 건축문화유산인 석고각에 대해 해체부재 정밀실측 및 HBIM을 활용한 복원 시뮬레이션을 제시하고자 한다. 연구 과정에서 석고각에 사용되었던 부재의 실측조사를 통해 주요 부재별 손상 상태와 재사용 가능성을 파악하였다. 주요 부재별 조사 내용을 근거로 창건 당시 석고각과창경궁 야외무대로 변용 당시의 모습을 HBIM 모델링 하여 건축구조와 형식, 변화 과정을 분석하였다. 이를 통해 다양한원인으로 훼손, 훼철될 가능성이 있는 건축문화유산의 방재 및 복원대책 수립 시 HBIM 활용에 대한 수리방법론을 제시하고자 한다.
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재무 가치를 고려한 PMO의전략적 동일 한정 자원 배분
황진하,김주한,황지연 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.3
Priority rules or sequencing heuristics conventionally used to determine resource allocation is to maximize the earned value on time and cost. This study provides a effective strategy-oriented approach for the program resource management problem with limited same resource, which systematically connects individual project objectives to the overall organizational goal, by introducing financial values as well as priority rules in a broader context. It deals with the resource allocation problem as the decision making problem in the strategic management paradigm to meet business objective and solves it using the analytic hierarchy process,and explains the method of application and usefulness through some simulation cases.
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