• 한국측량학회:학술대회논문집
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• 한국측량학회 2006년도 춘계학술발표회 논문집
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• pp.485-490
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• 2006

In this study, the Digital Surface Models of various spatial resolutions were constructed using LIDAR point data on Digital Photogrammetric System. Then, the accuracies of each DSM's were evaluated using GPS surveying data. And also, observable features were classified and their accuracies were evaluated to verify the availability for Ground Control Point. On Socet Set, Digial Photogrametric System 5 DSM's of which spatial resolutions were 0.15m, 0.5m, 1.0m, 2.5m and 5.0m were constructed and the accuracies of eahc DSM's evaluated in RMSE. The RMSE's of each DSM's were 0.03m, 0.05m, 0.08m, 0.12m and 0,19m. The building feature was observable in DSM's of which spatial resolutions were 0.15m, 0.30m and 0.50m. On the contrary, it could hardly be observed in those of other spatial resolutions. In comparison with the digital map at the scale of 1:1,000, the DSM at the spatial resolution of 0.lim was shifted horizaltally by 0.6m-0.7m of RMSE in each X, Y direction. Therefore, GCP of which horizontal RMSE is better than 1m can be obtained from the DSM at the spatial resolution of 0.15m, of which vertical RMSE is 0.03m-0.19m as the RMSE of DSM. This point cannot be used in aerial triangulation of cartography but can be used for GCP in modeling of satellite image at the moderate resolution.

• 한국측량학회지
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• 제38권2호
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• pp.131-140
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• 2020

Recently the importance of BIM (Building Information Modeling) that enables 3D location-based design and construction work is being highlighted around the world. In Korea, the road map has been established to settle the design based on BIM using drone survey results by 2025. As the first step, BIM would be applied to road construction projects worth more than 50 billion Korean Won from 2020. On the other hand, drone survey regulation has been enacted and the data for drone survey cost were also included on Standard of construction estimate in 2020. However, more careful improvement is required to reflect drone survey results in BIM design and construction. Currently, Engineering instructions and Standard of construction estimate specifies that earthwork volume must be calculated by cross section method only. So it is required to add the method of DEM (Digital Elevation Model) based volume calculation on these regulations to realize BIM application. In order for that, this study verified the method of DEM based earthwork volume calculation. To get an accurate DEM for accurate volume computation, drone survey was carried out according to the drone survey regulation and then could get an accurate DEM data which have errors less than 3cm in X, Y and 6.8cm in H. As each DEM cell has 3D coordinate component, the volume of each cell can be calculated by obtaining the height of area of the cell then total volume is calculated by multiplying total number of cells by volume of each cell for the construction area. Verification for the new calculation method compare with existing method was carried out. The difference between DEM based volume by drone survey and cross section based volume by traditional survey was less than 1.33% and it can be seen that new DEM method will be able to be applied to BIM design and construction instead of cross section method.

• 한국산학기술학회논문지
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• 제10권12호
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• pp.3715-3724
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• 2009

최근 들어 산업계에서 컴포넌트 기반의 소프트웨어 개발이 새로운 효율적 소프트웨어 개발 패러다임으로 받아들여지고 있다. 1990년대 후반 컴포넌트 기반 소프트웨어 공학이 소개되면서 컴포넌트기반 소프트웨어 개발 (CBSD) 관련 연구는 컴포넌트 모델링, 개발 방법론, 아키텍처, 그리고 컴포넌트 플랫폼 등에 주로 집중되어왔다. 그러나 시장에서 가용한 컴포넌트들의 수가 증가함에 따라, 컴포넌트들의 다양한 특성들을 정량화하기 위한 메트릭에 대한 개발이 점차 중요해지기 시작했다. 본 논문에서 우리는 소프트웨어 컴포넌트의 복잡도, 특화성, 재사용성을 측정할 수 있는 메트릭들을 제안한다. 복잡도 메트릭은 컴포넌트의 복잡성을 평가하는데 사용가능하고, 특화성은 해당 컴포넌트가 조직의 특화된 요구사항에 맞도록 얼마나 효율적이면서 폭넓게 커스터마이즈될 수 있는지를 측정하는데 사용된다. 재사용성은 애플리케이션을 구축할 때 해당 컴포넌트의 재사용되는 정도를 측정하는 용도로 사용된다. 제안하는 이러한 메트릭들은 컴포넌트가 갖는 특징들을 정량화하는데 보다 효율적으로 사용될 수 있으리라 기대한다.

• 한국위성정보통신학회논문지
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• 제12권4호
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• pp.34-41
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• 2017

본 논문은 기존에 개발된 자연재난 예측 모형과 사회재난 예측 모형을 통합한 복합재난 예측 모형을 구성하기 위하여 기존 예측 모형들의 입출력 파라미터를 분석하였다. 복합 재난 예측 모형은 단일 재난이 아닌 다수의 재난이 복합적으로 일어나는 상황을 나타낸다. 이러한 복합재난은 주로 자연재난으로 인해 발생한 사회재난으로 연계되는 경우가 주를 이루기 때문에 자연재난과 사회재난 예측 모형의 연결방안에 대해 연구를 진행하였다. 기존에 개발된 예측 모형 중 재난 유형별로 몇 가지 예측 모형을 기준으로 분석하였으며 재난 유형별로 공통적으로 적용되는 입출력 파라미터가 도출되었다. 본 논문은 향 후 진행되어질 복합재난 예측 모형 구축을 위한 연구에 도움이 될 것이라 생각한다.

• 한국실내디자인학회논문집
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• 제13호
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• pp.181-186
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• 1997

If you compare recent works in small commercial places along with the terms such as Post-Modernism, Late-Modernism, and Dismantling, to those of 60's and 70's, you will discover for sure that recent works try to model individually with 'surface'. Expressing the responses to the multilateral cultural desires is available through the organization of surface, so are the re-presentationsof classic notions by adding decorations to the vertical walls, which are different from modern constructions that have persisted on only space itself as a main point. These trends are various organizing techniques with forms, decorations, materials, color etc. and made the surface modeling develop. What a 'surface element' means as a concrete notion in a design process in a commercial place is enormous. So, it implies lots of notions and logic, and can be a strong message-conveying means as well as an expressional language. At this point of view, the research was limited to Facade, which is treated as a creational object to a designer all the time in order to study what kind of system the surface organization has in a small commercial place. This is to find out what kind of system the designer uses to make the spatial images, orders and forms through surface, but ultimately it is to discover the designer's basic tecniques that he or she uses when planning. To sum up, we have studied the meanings of the composition and the changes of the organization of Facade to analyze the organizing techniques in Pasad in a small commercial construction which designers planned as material. We have also investigated the organizing techniques of surface by examining and analyzing the elements of Facade organizing techniques, i.e. its form, decoration, material, pattern and color.

• International Journal of Aeronautical and Space Sciences
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• 제18권4호
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• pp.807-815
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• 2017

For liquid rocket engine(LRE)-based space launch vehicles, longitudinal instability, often referred to as the pogo phenomenon in the literature is predicted. In the building block of system-level task, accurate dynamic modeling of a fluid-filled tank is an essential. This paper attempts to apply the virtual mass method that accounts for the interaction of the vehicle structure and the enclosed liquid oxygen to LOX-filled tanks. The virtual mass method is applied in a modal analysis considering the hydroelastic effect of the launch vehicle tank. This method involves an analysis of the fluid in the tank in the form of mass matrix. To verify the accuracy of this method, the experimental modal data of a small hemispherical tank is used. Finally, the virtual mass method is applied to a 1/8-scale space shuttle external tank. In addition, the LOX tank bottom pressure in the external tank model is estimated. The LOX tank bottom pressure is the factor required for the coupling of the LOX tank with the propulsion system. The small hemispherical tank analysis provides relatively accurate results, and the 1/8-scale space shuttle external tank provides reasonable results. The LOX tank bottom pressure is also similar to that in the numerical results of a previous analysis.

• The Journal of Asian Finance, Economics and Business
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• 제7권3호
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• pp.211-221
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• 2020

This study aims to analyze the effect of structural Person-Organization Fit and organizational justice on organizational commitment, job satisfaction, Organizational Citizenship Behavior and employee performance. This study is based on a quantitative approach by collecting data using a survey conducted on three SOE's companies in Indonesia that operate in Makassar City, namely Pelindo. Ltd (Port Company), PLN. Ltd (Electric Company) and Pertamina. Ltd (Oil and Gas Company), with a sample of 90 employees. The study population was all non-managerial permanent employees. Data analysis using Structural Equation Modeling. In structural relations, out of the nine direct tests, there were two insignificant relationships, and in all three hypotheses there was one not-supported hypothesis. When compared between person-organization Fit and Organizational Justice, it is found that organizational justice has a more critical role in building Human Resource performance compared to Person-Organization Fit, because organizational justice is better able to provide job satisfaction and make organizational commitment and OCB as a prerequisite for its formation to better Human Resources performance. With organizational justice, employees will feel more satisfied working, committed to the work and organization, and behaves as a supportive organizational citizen for the realization of the best performance for the interests of the organization going forward.

• 한국산학기술학회논문지
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• 제15권12호
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• pp.7357-7363
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• 2014

우리나라는 화산 위험으로부터 안전한 지대로 알려져 있으나, 과거 1,000년 전에 백두산에서 큰 분화를 한 사례가 있으며 최근 화산분화의 전조현상들이 자주 보고되고 있어, 이에 대한 경고를 하는 화산전문가들이 늘어나고 있는 상황이다. 본 논문은 이러한 화산재해 발생시 공간정보 및 과학모델링 프로그램을 기반으로 신속하게 대응할 수 있는 화산재해대응시스템을 개발하고 활용방안을 제시한다. 세부적으로 언급하면 첫 번째로 사용자업무 및 관련시스템을 분석하여 화산재해 대응업무 프로세스를 도출하고, 두 번째로 이를 기반으로 화산재해대응시스템 설계 및 개발을 수행하며, 세 번째로 도출된 시스템의 효율성을 극대화하기 위한 활용 및 발전 방안을 제시한다. 본 연구를 통해 도출된 화산재해대응시스템은 우리나라를 비롯하여 동남아시아에 지역에 발생할 화산재해 피해를 최소화할 것으로 기대된다.

• 한국산학기술학회논문지
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• 제15권11호
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• pp.6922-6931
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• 2014

현대 과학기술과 컴퓨터공학의 발전은 정보통신 분야의 비약적 발전과 함께 생활양식에 많은 변화를 가져다주고 있다. 정부는 '미래교육 비전과 전략'을 통해 2030년의 미래사회를 예측하고 그에 맞는 인재 육성을 위해 미래지향적 관점으로 교육정책의 목표를 발표하였다. 교육과정의 변화에는 교육시설의 변화가 동시에 요구 되며, 교실운영과 교사공간정보는 연동된다. 최근 주목받고 있는 BIM 설계는 3D 형상정보 기반으로 설계할 수 있으며, 설계정보와 비형상 정보인 공간정보를 연계시킬 수 있다. 본 연구는 BIM 기반 교사공간정보를 활용하여 교육시설을 운영하고자 한다. 본 연구에서는 교사공간정보를 표준화하고 학교시설 BIM 발주와 운영을 위한 시나리오를 제안하고자 한다.

• 한국추진공학회지
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• 제19권4호
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• pp.15-23
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• 2015

본 연구는 유한요소해석 기반의 Helmholtz solver인 ASCI3D를 사용하여 예혼합 가스터빈 연소기에서 연소불안정 현상과 관련된 주요 결과들을 예측하였다. 해석결과는 실험결과와 비교할 때 일반적인 불안정 특성 예측에는 성공하였으나, 불안정 구간이 나타나는 영역을 다소 과대 예측하는 경향이 발견되었다. 이를 개선하기 위한 노력으로 반사계수가 불안정 특성에 미치는 영향이 분석되었다. 결과로부터 반사계수는 불안정 특성에 큰 영향을 미치고, 정확한 예측 결과를 얻기 위해서는 정확한 음향 경계 조건의 정의가 필수적인 것으로 나타났다.