• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.518-523
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• 2008

In this study, we analyzed applicability of object database, designed the concept model based on object-oriented idea for measurement data management, and applied the design model to object database. The concept model composes three sub models Infrastructure managing information model, Infrastructure measurement data model, and Measurement unit model. The process to expand measurement data of new type was executed easily without changing database schema in object database. The process to expand measurement data of new type was executed easily without changing database schema in object database. Therefore, applicability of new technology to infrastructures for building a safety management network of road bridges could be increased with object database system.

• 대한원격탐사학회지
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• 제23권3호
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• pp.199-209
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• 2007

Traditionally, aerial images have been used as main sources for compiling topographic maps. In recent years, lidar data has been exploited as another type of mapping data. Regarding their performances, aerial imagery has the ability to delineate object boundaries but omits much of these boundaries during feature extraction. Lidar provides direct information about heights of object surfaces but have limitations with respect to boundary localization. Considering the characteristics of the sensors, this paper proposes an approach to extracting buildings from lidar and aerial imagery, which is based on the complementary characteristics of optical and range sensors. For detecting building regions, relationships among elevation contours are represented into directional graphs and searched for the contours corresponding to external boundaries of buildings. For generating building models, a wing model is proposed to assemble roof surface patches into a complete building model. Then, building models are projected and checked with features in aerial images. Experimental results show that the proposed approach provides an efficient and accurate way to extract building models.

• 한국태양에너지학회 논문집
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• 제34권4호
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• pp.31-38
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• 2014

This study makes three apartment building complex an object of analyzing representative building types and energy consumption rate of house holds, and effect of outdoor air cooling. Recently created apatrment complex is composed of very various types of building, plan, and orientation etc. But, it is difficult to remark conclusively that these various types of buildings are designed energy-effectively. Because architects are hard to find useful energy design guideline for decision making. By the preceding study, the present condition and problem about this subject is grasped, apartment building types were examined and representative types were extracted. In this study, energy simulation was conducted, and the effect to outdoor air cooling was analyzed about representative types of the subject apartment complex. It is expected that this analysed results will be basic data for the more integrated study. Research consequence can be summarized as follow: 1) Besides solar gain, household layout of building, orientation, and plan etc. effects compositively on energy consumption rate. 2) The effect of ourdoor air cooling in building of tower type can be improved by arranging households appropriately.

• 한국지리정보학회지
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• 제9권2호
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• pp.11-19
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• 2006

하수관망은 인간의 삶을 증진시키거나 홍수와 같은 재해를 예방한다. 그러나 우리나라의 경우 하수처리시설에 대하여 관심을 가질 뿐, 관로에 대한 관리는 지도(map)의 수준에서 벗어나지 못하고 있다. 선형 객체의 경우 한 개의 선형에 단일 속성만 존재한다. 이 한계로 인하여 하수관거와 같은 선형 속성은 관리하기 힘들고, 선형의 부분적인(point type, line type) 속성 변화는 처리할 수 없다. 이에 본 연구는 속성 변화를 적용시킬 수 있는 방법을 찾고 적용하고자한다. 이를 위하여 Dynamic Segmentation을 이용하였다. DS는 선형객체 상의 정확한 위치에 속성값을 부여할 수 있는 장점을 가지고 있다. 이를 이용하여 하수관거 주위의 다양한 환경 변화를 적용 시킬 수 있었다. 또한 관거별 최대하수량을 정밀하게 계산할 수 있었다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2007년도 학술대회 1부
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• pp.612-615
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• 2007

This research studies the Virtual Reality simulation of Newton's physics law on rigid body type of objects for physics learning. With network support, collaborative interaction is enabled so that people from different places can interact with the same set of objects in Collaborative Virtual Environment. The taxonomy of the interaction in different levels of collaboration is described as: distinct objects and same object, in which there are same object - sequentially, same object - concurrently - same attribute, and same object - concurrently - distinct attributes. The case studies are the interaction of users in two cases: destroying and creating a set of arranged rigid bodies. We identify a specific type of application for contents authoring with modeling systems integrated with real-time physics and implemented in VR system. In our application called Virtual Dollhouse, users can observe physics law while constructing a dollhouse using existing building blocks, under gravity effects.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1299-1302
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• 2004

A real object duplication system (RODS), including three dimensional (3D) scanner and solid freeform fabrication system (SFFS), is a device to make three-dimensional objects directly from the drawing or photo data. A Selective Multi-Laser Sintering (SMLS) process designed in this paper is by which computer images received using 3D scanner are built up from polymer powder on building room of large size using dual laser at industrial type SFF system. Using the process can rapidly produce real object duplication components of industrial type such as cylinder, engine block, chassis of automobile, etc. In this paper, the industrial type SFF system using SMLS process is manufactured and the system is satisfied with high precision and high speed processing technique. To research characteristics of each part for theindustrial type SFF system, a structure and thermal analysis and test of each part is carried out. Also, to achievement of high performance for industrial type SFF system, design and fabrication for the structure, heater, nitrogen supply, laser and control part are carried out.

• 한국CDE학회논문집
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• 제22권2호
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• pp.118-128
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• 2017

Many countries have been developing BIM-based building code checking system and studies in the utilization of Industry Foundation Classes (IFC) in building code checking. IFC is the open standard of BIM format. Currently, there is a disadvantage that could not include all of the attribute for the regulations of each country and there is the problem with the interoperability of the different defined IFC approach between BIM software. This study focus on developing, derived object and property by comparing through domestic regulation and IFC2x3 specification provided by the buildingSMART and classified review type depending on the interoperability of derived information. According to classified review type, the IFC data structure was established and property mapping contents were developed by including BIM software compatible information and creating a type of review plan. When the developed property mapping contents are applied into BIM-based building code checking system, checking of the BIM data generated from various fields is made effective and thus improving the interoperability of information.

• 대한공간정보학회지
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• 제19권3호
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• pp.49-56
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• 2011

도시 지역의 환경은 빠르게 변화하고 있기 때문에 그 변화를 신속하게 탐지하여 수치지도 데이터베이스에 반영하는 것이 필요하다. 이에 LiDAR 자료를 사용하여 도시지역 건물의 변화를 탐지하려는 연구가 진행되고 있다. 본 연구에서는 LiDAR 자료와 기존 수치지도를 이용하여 객체 기반으로 건물변화를 탐지하고 그 유형을 분류하고자 하였다. 점 기반으로 건물의 외곽선을 추출하고 수치지도 건물 레이어와 중첩하여 중첩비교와 형상비교를 통해 변화유형을 분류하였다. 중첩비교시 객체별 적응적 임계치를 산정하여 적용함으로써 변화탐지의 객관성과 정확도를 높이고자 하였다. 실험결과, 제안한 방법으로 도시지역 건물의 변화를 탐지하고 분류하는 것이 기존 방법에 비해 높은 분류 정확도를 보임을 확인하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.208-209
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• 2022

This study aims to analyze the risk factors caused by object damage and third-party damage loss in actual bridge construction based on past insurance premium payment data from major domestic insurers for bridge construction projects, and develop a quantitative loss prediction model. For the development of quantitative bridge construction loss model, the dependent variable was selected as the loss ratio, and the independent variable adopted 1) Technical factors: superstructure type, foundation type, construction method, and bridge length 2) Natural hazards: flood anf Typhoon, 3) Project information: total construction duration, total cost and ranking. Among the selected independent variables, superstructure type, construction method, and project period were shown to affect the ratio of bridge construction losses, while superstructure, foundation, flood and ranking were shown to affect the ratio of the third-party losses.

• 한국주거학회논문집
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• 제8권3호
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• pp.119-129
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• 1997

The purpose of this study was to suggest fundmental data for facilities and the design of domitory building by investigating satisfaction of residents and their demands, grasping the present situation and the problem through the present of facilities and resident's actual condition. The object of this research were facilities and students using the domitory building of five universities. To analyze the data, frequncy, percentage, mean, one-way ANOVA and duncan-test were used by running SPSS $PC^＋$/ program. The major results are as follows. 1. There were differencies in the type of living space. the construction and furniture in the domitory building according to the five universities. 2. In using domitory building, five university students have significant differences. 3. There were significant differences in the satisfaction about exterior. interior and socio-psychological environment and the level of performance to the behavior.