• Asian review of World Histories
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• 제4권1호
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• pp.3-34
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• 2016

This introduction is both a statement of a research problem and an account of the first research results for its solution. As more historical databases come online and overlap in coverage, we need to discuss the two main issues that prevent 'big' results from emerging so far. Firstly, historical data are seen by computer science people as unstructured, that is, historical records cannot be easily decomposed into unambiguous fields, like in population (birth and death records) and taxation data. Secondly, machine-learning tools developed for structured data cannot be applied as they are for historical research. We propose a complex network, narrative-driven approach to mining historical databases. In such a time-integrated network obtained by overlaying records from historical databases, the nodes are actors, while thelinks are actions. In the case study that we present (the world as seen from Venice, 1205-1533), the actors are governments, while the actions are limited to war, trade, and treaty to keep the case study tractable. We then identify key periods, key events, and hence key actors, key locations through a time-resolved examination of the actions. This tool allows historians to deal with historical data issues (e.g., source provenance identification, event validation, trade-conflict-diplomacy relationships, etc.). On a higher level, this automatic extraction of key narratives from a historical database allows historians to formulate hypotheses on the courses of history, and also allow them to test these hypotheses in other actions or in additional data sets. Our vision is that this narrative-driven analysis of historical data can lead to the development of multiple scale agent-based models, which can be simulated on a computer to generate ensembles of counterfactual histories that would deepen our understanding of how our actual history developed the way it did. The generation of such narratives, automatically and in a scalable way, will revolutionize the practice of history as a discipline, because historical knowledge, that is the treasure of human experiences (i.e. the heritage of the world), will become what might be inherited by machine learning algorithms and used in smart cities to highlight and explain present ties and illustrate potential future scenarios and visionarios.

• 정보처리학회논문지A
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• 제10A권6호
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• pp.757-768
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• 2003

최근 환경 오염 및 자원 고갈 등의 이유로 대체에너지원은 미래의 에너지원으로 중요한 역할을 하고 있다. 국외에서는 대체에너지원에 관련된 정보 시스템의 개발 및 보급이 활발히 추진되고 있다. 그러나 국내에서는 대체에너지원 데이터의 효율적인 이력 관리 및 웹을 통한 검색 서비스가 제공되지 않고 있다. 따라서 이 논문에서는 대체에너지원 데이터의 방대한 이력 정보를 체계적으로 저장 및 관리하기 위한 대체에너지원 이력 데이터 관리 시스템을 제안한다. 이 시스템은 외부 관측 시스템으로부터 대체에너지원 데이터를 수집하여 이력 데이터베이스에 저장한다. 저장된 정보는 이력 질의 처리를 통해 검색되고 테이블, 그래프, 챠트, 등고선 등의 다양한 형태로 인터넷을 통해 제공된다. 특히, 제안 시스템은 실시간으로 이력 데이터를 관리하므로 사용자는 웹 인터페이스를 통해 항상 최신의 정보를 제공받을 수 있는 특징을 갖는다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집A
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• pp.702-707
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• 2000

Under the rapid change of a new vehicle model, it is necessary to develop a durability analysis technique using computer simulation. In order to do this. reliable dynamic stress-time history for the vehicle components must be calculated on various road conditions. In this paper, a full vehicle simulation model which is composed of flexible frame and chassis components is proposed and verified its reliability from the comparison with field test data. Finally, dynamic stress-time history on the rear chassis components is predicted with hybrid and modal superposition method.

• 치위생과학회지
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• 제20권4호
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• pp.261-268
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• 2020

Background: A comprehensive history taking at the first visit could be an important start of treatment. This study investigated the current status of the initial history taking for dental patients in S area, and the implementation and importance of the initial history taking process. Based on this, we intend to provide basic data for the development of organized and standardized questionnaires in dental clinics. Methods: In April 2019, 303 dental clinics in S area were targeted and special dental clinics (orthodontics, children, and disabled) were excluded. The questionnaire consisted of 29 items, including general characteristics, systemic disease history, dental history, oral health behaviors, and the data were obtained through self-administered questionnaire. Results: Initial history taking was mostly implemented using oral and questionnaire at the time of the first visit. Systemic disease history, dental history, and oral health behaviors differed in the work experience of the dental clinic staff. As a result of analyzing the importance according to implementation, there were significant differences in all questions except drug-related items. The importance of the questionnaire was highly recognized, but the reason it was not actually implemented was because of existing the questionnaire in the clinic and lack of time. Conclusion: Considering that the initial history taking implementation rate showed low, it is necessary to develop standardize a practical questionnaire and interview skills for dental clinics in the future. In addition, training programs should be provided to dental staff that can recognize the importance of initial history taking questionnaires and contribute to active implementation.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1999년도 봄 학술발표회 논문집
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• pp.159-168
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• 1999

In seismic analysis, there are two main ways - uniform load method and dynamic analysis, dynamic analysis can be divided into response spectrum analysis and time history analysis. In case of which get the complexion of the vibration with 3-axis of coordinate direction in each mode of free vibration mode happened owing to complication of the shape, 3-dimensional dynamic analysis is recommended to perform as multi-mode spectral analysis in standard specification for highway bridge. The purpose of this study is to understand the dynamic behavior by performing multi-mode seismic analysis according to responses analysis and time history anal)'sis in using record of earthquake. In accordance with the criterion of seismic design as defined in standard specification for highway bridge by using modified records of the El Centre and Coyote Lake earthquake, response spectrum was constructed by using the tripartite logarithmic plot. The 3-span continuous space truss bridge was selected as model of numerical analysis. As the result performed time history analysis and analysis of response spectrum for the model of numerical analysis, the result of time history analysis was slightly larger than that of response spectrum analysis. This coincide with the tendency of the result came from the analysis when using a jagged response spectrum analysis, This coincide with the tendency of the result came from the analysis when using a jagged response spectrum for a single excitation. In the Process of performing these two analysis. response spectrum analysis is more effective than time history analysis in saving times in analyzing data.

• 한국멀티미디어학회논문지
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• 제22권4호
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• pp.432-442
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• 2019

Most current human action recognition methods based on deep learning methods. It is required, however, a very high computational cost. In this paper, we propose an action change detection method to reduce repetitive human action recognition tasks. In reality, simple actions are often repeated and it is time consuming process to apply high cost action recognition methods on repeated actions. The proposed method decides whether action has changed. The action recognition is executed only when it has detected action change. The action change detection process is as follows. First, extract the number of non-zero pixel from motion history image and generate one-dimensional time-series data. Second, detecting action change by comparison of difference between current time trend and local extremum of time-series data and threshold. Experiments on the proposed method achieved 89% balanced accuracy on action change data and 61% reduced action recognition repetition.

• 한국구조물진단유지관리공학회 논문집
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• 제24권2호
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• pp.15-22
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• 2020

본 논문에서는 지진발생 후 임의 위치에서 발생된 지진가속도 시간이력을 추정하기 위하여 기상청 지진관측소 계측자료를 활용하는 방법을 제안하였으며, 국내에서 발생한 지진기록을 이용하여 제안한 응답스펙트럼 및 시간이력 추정 방법의 적용성을 평가하였다. 임의 관측소에서 계측된 결과를 인근 관측소 자료를 이용하여 추정하는 방법으로 제안방법을 검증한 결과, 지반정보 없이도 해당 관측소 위치의 지진가속도 응답스펙트럼 및 시간이력을 낮은 수준의 오차로 추정할 수 있었으며, 특히 시간이력의 경우 형상 및 위상의 변화에 큰 차이가 없음을 확인할 수 있는 등 제안된 방법이 임의 위치에서의 지진가속도 시간이력을 추정하는데 유효함을 확인할 수 있었다.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제22권5호
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• pp.235-239
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• 2016

커밋-버그 링크는 커밋히스토리(commit history)와 버그 리포트(bug report) 간의 연결(Link)을 뜻한다. 커밋-버그 링크는 소프트웨어 유지보수와 결함 예측, 버그 추적 시스템(Bug Tracking System)에 이용이 되며, 특히 결함 예측 측면에서는 성능면에서의 기반이 된다. 일반적으로 링크를 자동으로 연결하는 방식은 텍스트 유사도(text similarity)나 시간 간격(time interval), 키워드(keyword) 등을 통해서 추출하였다. 하지만 기존 방식은 커밋히스토리(commit history)의 질적인 부분에 의존적이기 때문에 다수의 링크를 놓치게 된다는 단점이 존재한다. 본 논문에서는 커밋히스토리의 메시지(message)부분에만 의존하지 않고, 버그리포트에서 연결된 커밋히스토리의 파일간의 유사도를 이용하여 링크를 연결할 수 있는 방식을 제안하고 실험을 통하여 본 기법의 적용성을 보인다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.253-262
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• 2010

In this study, localized heavy rainfall occurred during the collapse of steep slopes adjacent to the construction site and to ensure the safety of residents to build an early warning system was performed. Forecast/Alert range was estimated based on vulnerability landslide map and past disaster history. And established a critical line in consideration of the characteristics of local rainfall and operating a snake line, the study calculated causing and non-causing points. Also, be measured in real-time analysis of rainfall data in conjunction with the system before the steep slope failure occurred forecast/Alert System is presented.

• 한국컴퓨터산업학회논문지
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• 제5권9호
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• pp.1031-1042
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• 2004

대체에너지원 데이터는 측정값이 시시각각으로 변경되는 특성을 갖기 때문에 시간의 변화에 따라 발생되는 원시 데이터의 양이 상당히 방대하다. 따라서 대체에너지원 데이터의 이력 정보를 체계적으로 저장 및 관리할 수 있는 이력 데이터베이스의 구축과 대체에너지원 예측 시스템에 대한 연구가 필요하다. 이 논문에서는 대체에너지원 데이터의 과거 측정값에 대한 추정 기능의 지원을 통해 시시각각으로 변화하는 데이터를 체계적으로 관리하기 위한 대체에너지원 추정 기법을 제안하였다.