• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.1054-1059
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• 2005

To support the expansion of the autonomous robot market, the establishment of evaluation standards of the robot performance are essential. In this paper, to venture the standardization of the performance evaluation of the autonomous robot, the authors take the autonomous cleaning robot(ACR) as the initial stepping stone. Recently, the ACR has been being developed and marketed actively in many countries including Korea and it believes to be the fore-runner among various types of autonomous robot products. Standards of the performance evaluation for the ACR could be easily modified and applied to other autonomous robots. This paper formulates and suggests a group of standards for the performance evaluation based on a evaluation platform for the ACR. The newly developed performance evaluation platform has been designed to include all the important aspects of living environments in reality. In the platform the performance of the ACR is measured in terms of mobility, cleaning performance, avoidance of obstruction(safety), and operation noise. A few commercially available ACR products are collected and tested in the evaluation platform and compared against the performance evaluation standards formulated.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.896-899
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• 2005

In this research, we investigated the acoustical characteristics of the front yard of Injeongjeon hall at Changdeokgung Palace, a Korean traditional building which is on record as the world curtural inheritance of UNESCO. Acoustical measurements and computer simulation were fitted in order to judge the appropriateness of musical performances in the space. The front part of the stage area, where musicians will perform, is made of a stone platform. The eaves of Injeongjeon hall is located behind the platform.

• 한국농촌건축학회논문집
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• 제15권4호
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• pp.35-42
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• 2013

The study aims to investigate general characteristics of Jae-sil from an architectural perspective by grasping location, deployment, structure, and plan composition based on existing inhabited conditions in Jeollabukdo. Results derived from the study are as follows. First, the location of Jae-sil is classified into mountainous and village types, and the two types showed a similar distribution. The village type showed the most distribution in the foot of a mountain in the rear of village, while the mountainous type is close to graveyard. The Jae-sil were mostly exposed to south, southeast, and southeast, which was not significantly different from residence. For deployment of the Jae-sil, a "二" shaped house, where main quarter and gated building are parallel located, can be common, indicating that additional attached building is less required. Second, for the platform out of structural components, coursed masonry was conducted by using natural rocks, and placed were a prop on the platform, first line on processed foot stone, and others on natural foot stone. For pillar, front line round columns, while others square columns. The binding type of the upper part of pillar is dominated by jangyeosujang and sorosujang. For wooden frame structure, 5ryangs were the most distributed, and out of these, 1goju 5ryang was the most generally used. For a roof part, it was composed with gambrel roof with single eave, and the roof was constructed by placing traditional Korean tile roof on the top. Third, for a size of Jae-sil out of plan composition, although the facade and the side of it were presented in a diverse manner, 4 facade rooms and 1.5 side rooms were the most frequently presented, and all Jae-sil were equipped with front ceremonial space. For spatial composition of Jae-sil, main floored hall is placed at the center, and each room is placed on the left and right side to secure space for ancestral rite for participants of it, and for a house with 5 rooms or more, it shows that main floored hall and rooms are weighted from side to side.

• 헤리티지:역사와 과학
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• 제54권4호
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• pp.112-131
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• 2021

경복궁 광화문은 고종 연간인 1866년 흥선대원군이 경복궁을 중건하면서 함께 설립되었다. 광화문 남쪽으로 너른 단인 월대를 설치하여 위계를 드러냈다. 광화문 월대는 좌우에 난간석을 설치하였고, 중앙에 어로를 두었으며, 남쪽으로는 계단과 경사면을 설치하였다. 월대 어로와 이어진 남쪽 경사면에는 좌우에 용두석을 설치하여 왕의 길이라는 점을 조형적으로 표현하였다. 광화문 월대 중앙에 있던 어로는 1915년 조선진흥공진회가 경복궁에서 개최됨에 따라 넓혀졌고, 1925년경 월대가 훼철되었다. 이후 광화문 이전에 따라 그 형상을 찾을 수 없었다. 경복궁 광화문처럼 월대를 설치하는 모습은 다른 궁에서도 쉽게 찾을 수 있다. 그러나 월대 좌우에 난간석을 설치한 모습은 광화문이 유일하다. 현재 광화문 월대의 난간석과 경사로에 위치한 석수가 남아 있지 않지만, 사진을 토대로 비교한 결과 광화문 월대의 난간석은 19세기 조선 왕실에서 제작한 석물의 양상을 보이며, 용두석 역시 대한제국 시기에 조성한 상징물에서 유사한 모습을 찾을 수 있다. 한편 동구릉에는 능에 배치되지 않는 여러 석물이 남아 있는데, 홍예석, 문소전 구기비뿐 아니라 난간석의 부재인 난간석주, 동자석, 죽석이 전해진다. 조선왕릉봉분 주변에 설치하는 난간석은 민무늬로 된 석물이 없는 반면, 궁궐 주변에 설치된 금천교에서는 문양이 없는 난간석을 설치하는 경우가 다수 남아 있다. 동구릉에 있는 난간석과 용두석은 광화문 월대의 석물로 보이는데, 시대적 양식 분석과 근대 사진과의 비교를 통하여 광화문에 설치했던 석물이라는 점을 확인할 수 있다. 경복궁 광화문 월대의 석물은 1915년 공진회 때까지는 본래의 위치에 남아 있었지만 1920년대 조선총독부 청사가 들어서고 전차가 부설됨에 따라 훼철되었다. 조선총독부 청사 위치에 자리한 영제교도 이 시기에 훼철되었으며, 1930년대까지 경복궁 지역에 남아 있다가 동구릉 지역으로 함께 옮겨지게 되었다. 본 연구를 통해 현재 광화문 월대 복원을 추진하는 시점에서 복원의 단초가 되길 기대한다.

• Coupled systems mechanics
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• 제10권1호
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• pp.1-19
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• 2021

Composite nature of the masonry structures in general causes complex and non-linear behaviour, especially in intense vibration conditions. The presence of different types and forms of structural elements and different materials is a major problem for the analysis of these type of structures. For this reason, the analysis of the behaviour of masonry structures requires a combination of experimental tests and non-linear mathematical modelling. The famous UNESCO Heritage Old Bridge in Mostar was selected as an example for the analysis of the global behaviour of reinforced stone arch masonry bridges. As part of the experimental research, a model of the Old Bridge was constructed in a scale of 1:9 and tested on a shaking table platform for different levels of seismic excitation. Non-linear mathematical modelling was performed using a combined finite-discrete element method (FDEM), including the effect of connection elements. The paper presents the horizontal displacement of the top of the arch and the failure mechanism of the Old Bridge model for the experimental and the numerical phase, as well as the comparison of the results. This research provided a clearer insight into the global behaviour of stone arch masonry structures reinforced with steel clamps and steel dowels, which is significant for the structures classified as world cultural heritage.

• International Journal of Computer Science & Network Security
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• 제24권1호
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• pp.187-195
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• 2024

This is an extended paper explaining the role of E-learning and quality development in the current situation. Amid Covid:19, E-Learning has achieved a new miles stone in imparting education and all levels of institutions have transformed their learning platform from face to face to virtual learning. In this scenario E-Learning is facing two major challenges, first to ensure the ability of computer systems or software to exchange and make use of information on virtual platform (interoperability) and secondly, developing quality learning through e-Learning. To impart learning and teaching (L&T) through E-learning, Middle East University (MEU) has adopted Learning Management Services (LMS) through Blackboard. The university has three types of L&T methods; full online, Blended and Supportive. This research studies the concept, scope and dimensions of interoperability (InT) of E-Learning in MEU then the connection and interdependence between with quality development. In this paper we have described the support and the importance of finest standards and specifications for the objectives of InT of E-Learning and quality development in MEU. The research is based principally on secondary data observed from MEU E-Learning deanship. Also sample of 20 E-Learning experts at MEU were given closed ended as well as semi closed questionnaires for evaluating the assurance of InT of E-Learning and quality development. These experts are mainly certified online facilitators and admin staff. Results provide the verification of application and presence of InT of E-Learning and assured the quality development process in MEU.

• 한국전산구조공학회논문집
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• 제19권2호
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• pp.161-169
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• 2006

본 연구에서는 효과적인 인터넷 기반 구조해석 플랫폼을 개발하기 위하여 컴포넌트 모델을 제시하였다. 구조해석의 특성상 복잡한 알고리즘을 수행해야 하므로 다수 사용자에 대한 원활한 서비스를 위해 서버 연산 보다는 X-Internet을 이용한 클라이언트 연산을 실시하였다. 기존 상용 해석프로그램들의 사용자 편의적인 인터페이스에 부합되도록 Smart Client를 이용하여 윈도우 기반 인터페이스를 구축하였으며, 개발된 플랫폼의 재사용 및 확장성을 고려하여 컴포넌트 기반 프로그래밍을 함으로써 수정 및 변화에 능동적인 대처가 가능하게 하였다. 컴포넌트는 분할-단순화의 기법을 적용하여 전체 시스템을 표현하였고, 상위 컴포넌트와 하위 컴포넌트, 컴포넌트와 객체간의 관계에는 공통 인터페이스를 사용함으로써 라이브러리간의 연결을 명확히 구분하였다. 설계검토를 XML WebService를 사용하여 이기종 플렛폼과의 데이터 통신을 실시함으로써 차후의 통합 CAE에서의 데이터 교환의 기틀을 제시하였다. 2차원 트러스 구조물의 정적해석 및 설계검토를 수행하여 개발한 플랫폼의 효율성을 검증하였다.

• International Journal of Aeronautical and Space Sciences
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• 제10권2호
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• pp.140-147
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• 2009

The paper presents the design, development and testing activities of the multi-rotorcraft-based unmanned aerial vehicle at the Center for Unmanned System Studies, Institut Teknologi Bandung (ITB), Indonesia. The multi-rotor system was selected as the design stepping stone for future development of personal aerial vehicle prototypes. A step-by-step design program is conducted to study the technology building blocks and critical issues associated with the design, development and operation of personal aerial vehicles. A number of multi-rotor configurations have been investigated providing basic guidelines for developing a stable unmanned aerial platform. The benefit of the presently selected configuration is highlighted and some preliminary testing results are presented.

• 한국안전학회지
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• 제15권2호
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• pp.36-45
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• 2000

Automated production system is composed of many complicated techniques and it become a very difficult task to control, monitor and diagnose this compound system. Moreover, it is required to develop an effective diagnosing technique and reduce the diagnosing time while operating the system in parallel under many faults occurring concurrently. This study develops a Modular Artificial Neural Network(MANN) which can perform a diagnosing function of multiple faults with the following steps: 1) Modularizing a complicated system into subsystems. 2) Formulating a hierarchical structure by dividing the subsystem into many detailed elements. 3) Planting an artificial neural network into hierarchical module. The system developed is implemented on workstation platform with $X-Windows^{(r)}$ which provides multi-process, multi-tasking and IPC facilities for visualization of transaction, by applying the software written in $ANSI-C^{(r)}$ together with $MOTIF^{(r)}$ on the fault diagnosis of PI feedback controller reactor. It can be used as a simple stepping stone towards a perfect multiple diagnosing system covering with various industrial applications, and further provides an economical approach to prevent a disastrous failure of huge complicated systems.

• 건축역사연구
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• 제30권3호
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• pp.21-31
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• 2021

This paper studied the Pingzuo(平坐) platform structure of the two story building covered with one roof during the early period of Tang dynasty, based on wall paintings, stone pagodas, brick buildings and wooden buildings might be influenced by the Tang style. Instead of Chazhuzao(叉柱造), the typical column linkage in the Song, Liao and Jin buildings, it put the boundary column just behind the wall of a bracket set. Otherwise, the column root might be seen from outside, because its bracket set was still using Touxinzao(偸心造) which did not have a lateral arm on it. And its flooring structure was also different from the Song style, it used cantilever beams instead of lateral beams supported by bracket sets.