• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2022년도 가을 학술논문 발표대회
• /
• pp.217-218
• /
• 2022

Supervision work deals with important data necessary for the performance management on building construction sites in accordance with the Building Act. Therefore, this study attempts to use the data from supervisory reports to measure the performance of private building projects. Performance measurement is important for systematic management. However, there are only a few cases in which performance measurement is performed because it requires strenuous efforts to collect data for measurement. First, this study derived 6 performance areas and 15 indicators through a few rounds of expert group discussions. Then, we confirmed the performance indicators with high feasibility of data collection through a survey of supervision experts. It is expected that the data of supervisory reports can measure systematically performance and assist in speedy diagnosis of private building construction sites.

• 건축역사연구
• /
• 제23권1호
• /
• pp.7-19
• /
• 2014

This study considers the proper repair techniques by examining the most representative repair cases of the Korean arch bridges and proposes the constructional manual which can apply similar occasions. The cases are Seonamsa Seungseongyo and Songgwangsa Geukrockgyo where this researcher had taken part in the repair works. This Study proposes the maintenance construction manual about the performance degradation drew by performance degradation of the both Korean arch bridges in the maintenance process. First, arch bridge maintenance should be carried out in the dry season, when water is impermeable in the bottom surface of the bridge. Moreover, risk factors of the maintenance should be excluded to secure the water vally flow, the bypass and the temporary bridge. Second, prior to repair, it has to precede (1)3D shooting (2)formal examination (3)structure safety test (4)geological and lithic surveys (5)arch curvature establishment and makeshift frame settlement before transformation (6)relationship expert comments. Third, if the baduk and the foundation stones are inevitable to replace due to performance degradation on the foundation, it should use the high quality stones and secure greater stress by extending the standard range. The foundation on irregular rock needs to be flattened and underside on the replaced materials require Grengyijil to deliver the equal loads. Fourth, In the process of dismantling the stones of the arched bridge, it could make heavy weathering degree and not reuse the materials. Charge should converge the expert advices to choose the reuseable, the conservate and the alternative materials, and increase the reutilization of the raw materials by preservation and reinforcement treatments. Fifth, the side wall should be repaired by the rubble work technique which is not able to pile compost satiety, so it must use long depth of masonary stones for reinforcement. It is considered to reinforce the stone wall in shore as much as possible and protect the abutment and the side wall on the upstream for the arch bridge maintenance works.

• Journal of Electrical Engineering and information Science
• /
• 제2권5호
• /
• pp.45-50
• /
• 1997

This paper present an advanced fault diagnosis expert system to assist the operators at local control center. The system utilizes all th information available in a local control center for the better diagnostic performance. The major feature of the system is dealing with multiple faults diagnosis based on the certainty factor method for the reasoning process. the overall performance and the generality are also enhanced by utilizing the general topological knowledge. ASCADA simulator is also developed for he test and demonstration.

• 한국항공운항학회지
• /
• 제22권4호
• /
• pp.42-55
• /
• 2014

The purpose of this research was to identify expertise in ait traffic control by using cognitive skill analysis for novices and experts in routine and non-routine situations. The result of study was to understand expertise in air traffic control tasks in terms of what cognitive processes are responsible for the expert's high performance levels. The problem solving task was difficult for novices, but performed relatively automatically by experts in a routine situation. The difficulty could indicate the presence of controlled processing. Rather than rules and strategies, novices focused more on environmental factors, which merely increase cognitive load. In a non-routine situation, novices showed that they did not categorize the information consistently and alternative resources were not available for them. Experts, however, performed automatically a task by arranging and organizing information related to problem solving components in contexts without regard to a routine and non-routine situation. Especially experts developed a stable representation and directed alternative resources for air traffic flow and efficiency. Based on the results, cognitive processes of experts could be useful to understand expert performance and analyze the learning process, which imply the necessity of developing expertise systematically.

• 한국항공운항학회지
• /
• 제23권3호
• /
• pp.18-27
• /
• 2015

Many studies have shown that having perception of spatial information is important for air traffic control officer (ATCO) since it helps them understand the current situation and predict the situation it leads to. However, little or no research has been done to investigate if there is any difference at the levels of expertise in perceiving spatial information and predicting a prospective situation. This study investigates the difference between expert and novice ATCO groups in how accurately each group of ATCO perceive spatial information such as position, altitude, speed, and flying direction, and predicting such information they will encounter shortly. In completing a task to watch the movement of airplanes displayed on the computer monitor as a blip, the participants were asked to predict the position, speed, and the altitude of the aircraft in a minute by marking on the sector map. The results show that the expert group performed better in accuracy and had tendency to overestimate on position and altitude; however, no significant difference was found between the two groups in terms of reading a flying direction. Therefore reading a flying direction may not be a reliable indicator to judge expertise of ATCO. But the expert group shows better predicting performance by perceiving spatial information such as airplane's position and altitude with feeling on time. The study suggests that it is important to enhance perceptive skills in ATCO training in improving their expertise in predicting accuracy traffic situation, preventing from air collision, and improving productivity for more efficient air traffic flow. A further study on the relationship between the perception of spatial information and the sense of time in predicting future information and effectiveness as an independent factor would contribute to providing more insights into expertise of ATCOs.

• 대한전기학회논문지:전력기술부문A
• /
• 제53권11호
• /
• pp.596-603
• /
• 2004

This paper proposes an expert system based on the pattern recognition method which can enhance the accuracy and effectiveness of real-time bus reconfiguration strategy for the transfer of faulted load when a main transformer fault occurs in the automated substation. The minimum distance classification method is adopted as the pattern recognition method of expert system. The training pattern set is designed MTr by MTr to minimize the searching time for target load pattern which is similar to the real-time load pattern. But the control pattern set, which is required to determine the corresponding bus reconfiguration strategy to these trained load pattern set is designed as one table by considering the efficiency of knowledge base design because its size is small. The training load pattern generator based on load level and the training load pattern generator based on load profile are designed, which are can reduce the size of each training pattern set from max L/sup (m+f)/ to the size of effective level. Here, L is the number of load level, m and f are the number of main transformers and the number of feeders. The one reduces the number of trained load pattern by setting the sawmiller patterns to a same pattern, the other reduces by considering only load pattern while the given period. And control pattern generator based on exhaustive search method with breadth-limit is designed, which generates the corresponding bus reconfiguration strategy to these trained load pattern set. The inference engine of the expert system and the substation database and knowledge base is implemented in MFC function of Visual C++ Finally, the performance and effectiveness of the proposed expert system is verified by comparing the best-first search solution and pattern recognition solution based on diversity event simulations for typical distribution substation.

• 한국컴퓨터정보학회논문지
• /
• 제17권10호
• /
• pp.1-9
• /
• 2012

지진, 태풍, 쓰나미 등의 환경재해에 대한 피해 뉴스가 빈발하게 보도되고 있다. 이러한 자연재해로부터 구조물의 건전성이 위협받는 상황에서 이를 최대한 빠르게 확인하여 정확한 경보를 하는 것만이 인명 및 재산의 피해를 최소화할 수 있는 방법이다. 본 연구에서는 경보시스템의 오경보를 줄이고 정확성을 높이고자 전문가 시스템을 설계하였다. 전문가 시스템은 인접해 있는 다수의 센서를 하나의 그룹으로 바라보고 단일 센서가 아닌 인접한 센서의 상태를 함께 비교함으로 모니터링 시스템의 신뢰도 높이는데 초점을 두고 있다. 시설물 유지 관리자에게 건전성 유무를 판단할 정확한 자료를 제공하는 것은 조기대응으로 인한 현재의 피해를 최소화할 수 있으며, 추후 발생할 수 있는 추가적인 피해를 예방할 수 있는 장점이 있다.

• 전자공학회논문지CI
• /
• 제38권6호
• /
• pp.57-69
• /
• 2001

전문가 시스템은 인공지능의 한 분야로서 인간의 사고방식을 모방함으로써 다양한 분야에서 야기되는 문제들을 해결해준다. 대부분의 전문가 시스템은 추론엔진과 지식베이스등과 같은 많은 요소들로 구성된다. 특히 전문가 시스템의 성능은 추론엔진의 효율성에 의해 좌우된다 이러한 추론 엔진은 지식베이스가 구축될 때, 가능한한 적은 제약성을 가져야 함은 물론, 다양한 추론 방법을 제공해야 한다는 특정을 갖고 있어야 한다. 이 논문에서는 도메인 지식 표현을 위한 지식스키마와, 추론을 위한 지식구현 기법, 그리고 블랙보드와 추론엔진을 혼합한 지식베이스 엔진을 제안한다. 그리고 제안한 기법들을 이용하여 구축한 중공업 장비 진단 전문가 시스템에 대해서 설명한다. 이 논문에서 연구한 고장진단 지식기반 시스템은 지식기반 시스템 연구분야의 실질적 기반이 될 수 있을 것이다.

• 한국컴퓨터정보학회논문지
• /
• 제19권11호
• /
• pp.149-157
• /
• 2014

당뇨병은 급성합병증을 예방하고 장기간의 합병증의 위험도를 감소하기 위하여 지속적인 치료와 환자 자가 관리 교육이 필요한 만성질환이다. 또한 전 세계적으로 당뇨병에 대한 유병률과 사망률이 대부분의 인구집단에서 역학적 비율에 도달하였다. 많은 연구에서 당뇨병에 대한 조기진단은 적절한 치료와 생활습관을 지키는 관리를 통하여 발병을 예방하는데 도움을 줄 수 있으며, 이를 통하여 당뇨병의 합병증을 감소시키고 생존률을 향상시킬 수 있다고 보고하고 있다. 본 연구는 PIMA Indians 당뇨 데이터에 대하여 mixture of expert 모형을 적용하여 당뇨유병환자의 여부를 분류하고, 이를 로지스틱 회귀분석, 신경망분석의 성능과 비교함으로서 그 유용성을 주장하고자 하였다. 연구결과 정확도 및 ROC 곡선, c-통계량에서 ME 모형이 다른 분류도구들에 비해서 높게 나타남을 확인할 수 있었다.

• 상하수도학회지
• /
• 제29권5호
• /
• pp.583-590
• /
• 2015

Evaluation and comparison for the performance on the contracting-out became possible after the introduction of the performance indicators(PIs) in 2012 in Korea, And local governments and private companies are utilizing them as evaluation data to enhance the performance of the contracting-out. Several revisions on performance indicator were carried out by expert group on contents validity of PIs, But the review of the composition validity of PIs was not sufficient. In this study, the applicability, distinction ability and composition validity of PIs is evaluated by statistical method. From the results, Improvement of indicator is required in order to increase the interrelationship among indicators to enhance the compostion validity of indicators related with operation, sludge and water reuse.