• Journal of Information Processing Systems
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• 제10권3호
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• pp.335-354
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• 2014

The accuracy of training-based activity recognition depends on the training procedure and the extent to which the training dataset comprehensively represents the activity and its varieties. Additionally, training incurs substantial cost and effort in the process of collecting training data. To address these limitations, we have developed a training-free activity recognition approach based on a fuzzy logic algorithm that utilizes a generic activity model and an associated activity semantic knowledge. The approach is validated through experimentation with real activity datasets. Results show that the fuzzy logic based algorithms exhibit comparable or better accuracy than other training-based approaches.

• 정보관리연구
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• 제40권3호
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• pp.61-77
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• 2009

최근 기업에서는 정보자산을 여러 가지 통제 및 관리 수단을 통해 보호활동을 하고 있다. 그러나 보호수준을 높게 요구할수록 업무 수행의 불편함으로 단기적인 효율성 및 생산성이 감소하게 되었다. 이와 함께 조직의 정보보호를 위한 투자가 지속적으로 증가함에도 불구하고 정보보호 성과측정을 위한 체계적인 방법이 제시되지 않아 정보보호 투자 의사결정 및 정보보호 개선 방향 도출이 어려운 것이 현실이다. 본 연구에서는 기업의 정보자산의 보호에 대한 개념을 정립하고자 하였다. 이를 위해 문헌연구를 바탕으로 정보자산보호를 위한 활동의 유형을 관리활동과 통제활동으로 분류하여 이들이 정보자산보호활동의 성과와 조직 성과에 미치는 영향을 연구하였다. 본 연구를 위해 이론연구와 더불어 실증적 연구분석을 위해 설문조사를 실시하였으며, 수집된 자료는 PLS(Partial Least Square)를 이용하여 측정모형 및 가설검증을 실시하였다. 통계분석 결과, 정보자산보호 관리활동은 정보자산보호 성과에 긍정적 영향을 미치며, 정보자산보호 통제활동은 정보자산보호 성과에 유의한 영향을 미치지 않는 것으로 나타났다. 또한 정보자산보호 성과는 조직 성과에 대해 긍정적인 영향을 미치는 것으로 나타났다. 이 외에 본 연구결과에 대한 의의 및 한계점을 논의하였으며, 향후 연구에 대한 시사점도 언급하였다.

• International Journal of Computer Science & Network Security
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• 제22권11호
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• pp.177-183
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• 2022

Thanks to the informatization of society, complex and high-tech devices are being introduced in all areas of human life, and the latest technologies are being actively improved in the modern, globalizing world. The article deals with the issues of using information and communication technologies in legal activities. It also covers the main types of such activities: law-making, law enforcement, and interpretive activity. Since there is an increase in the flow and accumulation of legal information, it is practically impossible to use traditional methods of working with legal information. The article considers and analyzes the role of information and communication technologies in modern legal activity. It is necessary to reveal the principles, concepts, conditions, and factors of their development and develop theoretical and practical recommendations for the use of such technologies in order to solve legal tasks. The authors of the article raise the issues of increasing the efficiency of legal activity, as well as the integration of information technologies into practical legal activity and their use for collecting, storing, searching, and issuing legal and reference information. Much attention is paid to the specific use of automated data banks and information retrieval systems in legal practice that ensure the accumulation, systematization, and effective search for legally important information. The development of such technologies leads to the creation of comfortable conditions for a lawyer in the course of their professional activity. Currently, legal activity cannot exist without telecommunication technologies, legal reference systems, and electronic programs. The authors believe that due to the use of the latest information technologies, the time for making legal decisions has significantly accelerated, the process of searching and systematizing evidence has been worked out, and it has become possible to quickly and efficiently find information on adopted laws and legal acts.

• Journal of Information Science Theory and Practice
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• 제8권3호
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• pp.47-63
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• 2020

This study focuses on users of activity tracking technologies and their related information behavior. How useful is the provided information by the trackers? Do users understand all information and explanations? We conducted a web-based survey. All in all, 631 users of a tracking device filled out the survey. From the perspective of information science, this investigation aims to analyze information needs considering different types of the provided information by activity tracking technologies. Are users satisfied by using the information on their steps, heart rates, and sleep duration? How do users assess readability about heart rate zones and sleep stages? Additionally, we investigated if users understand how to reflect on and adapt their health behavior based on the received explanations. According to the results, users mainly agree that the received information (raw data as well as - to a lesser extent - aggregated data in the form of corresponding diagrams) is useful, that the explanations are easy to understand, and that they know how to use this obtained information. This investigation enables an in-depth insight into how users are applying the self-quantifying activity and health information and which information needs are satisfied.

• 융합보안논문지
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• 제16권7호
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• pp.51-59
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• 2016

기업의 정보시스템에 대한 내 외부의 위협이 증가되고 있으며 이를 감소시키기 위해 많은 돈과 인력을 투자하고 있다. 하지만 이러한 투자에도 불구하고 보안위협과 사고는 지속적으로 발생하고 있다. 본 연구는 기업의 사고 방지를 위한 다양한 정보보호 활동을 예방 지향적과 억제 지향적으로 구분하고 건강신념모델을 이용하여 기업의 정보보안 활동이 구성원들에게 어떤 영향을 미치고 정보보안 정책을 준수하도록 하는지 연구하였다. 연구결과 예방 지향적 활동은 심각성에, 억제 지향적 활동은 유익성에 유의미한 영향을 주고, 심각성과 유익성은 각각 준수의도에 영향을 주었다. 이러한 결과로 미루어보아, 기업에서 교육, 홍보, 모니터링 등 사전적인 활동을 시행할 경우 미 준수로 발생할 수 있는 부정적인 결과에 대해 강조하여야 하며, 감사, 처벌 등 사후적인 활동을 통해 보안을 유지하고자 할 경우 기업의 의지를 보임으로써 보안 정책을 준수하는 것이 유익할 것이라는 판단을 구성원 스스로 하도록 하는 것이 더욱 효과적인 정보보안 활동이 될 것이다.

• Journal of information and communication convergence engineering
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• 제1권4호
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• pp.205-208
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• 2003

Voice activity detection is a important problem in the speech recognition and speech communication. This paper introduces new feature parameter which are reconstructed by spectral entropy of information theory for robust voice activity detection in the noise environment, then analyzes and compares it with energy method of voice activity detection and performance. In experiments, we confirmed that spectral entropy and its reconstructed parameter are superior than the energy method for robust voice activity detection in the various noise environment.

• Journal of information and communication convergence engineering
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• 제15권3호
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• pp.182-186
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• 2017

Maintaining a proper lookout activity routine is integral to preventing ship collision accidents caused by human errors. Various subjective measures such as interviewing, self-report diaries, and questionnaires have been widely used to monitor the lookout activity patterns of navigators. An objective measurement of a lookout activity pattern classification system is required to improve lookout performance evaluation in a real navigation setting. The purpose of this study was to develop an objective navigator lookout activity classification system using wearable accelerometers. In the training session, 90.4% accuracy was achieved in classifying five fundamental lookout activities. The developed model was then applied to predict real-lookout activity in the second session during an actual ship voyage. 86.9% agreement was attained between the directly observed activity and predicted activity. Based on these promising results, the proposed unobstructed wearable system is expected to objectively evaluate navigator lookout patterns to provide a better understanding of lookout performance.

• 한국도서관정보학회지
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• 제43권1호
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• pp.221-239
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• 2012

도서관 이용자의 복잡한 환경과 이용패턴에 따라 생성된 정보는 지식구조화를 통해 이용자에게 적합한 상황인지 정보서비스에 활용된다. 따라서, 도서관 이용자의 다양한 컨텍스트를 정의하고 상호 관련된 컨텍스트의 지식구조화를 위한 컨텍스트 모델 구축이 필수적인 요건이다. 본 연구에서는 컨텍스트의 개념 및 컨텍스트 모델링을 고찰하고, Engestrom의 행위이론의 개념을 활용하여 도서관 이용자의 행위 모델을 1) 주체, 2) 목적, 3) 도구, 4) 노동단위, 5) 커뮤니티, 그리고 6) 규칙으로 설계하였다. 또한, 도서관 이용자의 컨텍스트를 분석하기 위하여 행위정보를 수집하여 그들의 행태를 관찰 및 기록하는 사용자 추적법 (Shadow Tracking)을 활용하였고 수집된 행위정보는 CAbAT(Context Analysis based on Activity Theory)의 방법론을 활용하여 도서관 이용자의 컨텍스트를 설계하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권11호
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• pp.2016-2034
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• 2011

Ubiquitous Healthcare (u-Healthcare) is the intelligent delivery of healthcare services to users anytime and anywhere. To provide robust healthcare services, recognition of patient daily life activities is required. Context information in combination with user real-time daily life activities can help in the provision of more personalized services, service suggestions, and changes in system behavior based on user profile for better healthcare services. In this paper, we focus on the intelligent manipulation of activities using the Context-aware Activity Manipulation Engine (CAME) core of the Human Activity Recognition Engine (HARE). The activities are recognized using video-based, wearable sensor-based, and location-based activity recognition engines. An ontology-based activity fusion with subject profile information for personalized system response is achieved. CAME receives real-time low level activities and infers higher level activities, situation analysis, personalized service suggestions, and makes appropriate decisions. A two-phase filtering technique is applied for intelligent processing of information (represented in ontology) and making appropriate decisions based on rules (incorporating expert knowledge). The experimental results for intelligent processing of activity information showed relatively better accuracy. Moreover, CAME is extended with activity filters and T-Box inference that resulted in better accuracy and response time in comparison to initial results of CAME.

• 한국정보시스템학회지:정보시스템연구
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• 제7권1호
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• pp.55-76
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• 1998

Various trials to overcome the limitation of current accounting which fails in synchronizing business activities and their information have failed to make satisfactory result merely showing a little saving of processing time. This is because such trials have been done within the boundary of double-entry bookkeeping system. Without consolidating business activities and their information, reformation efforts such as BPR(business process re-engineering), ABC(activity-based costing), CALS(commerce at light speed) etc to fit the business organization to the changing business environment could not be achieved. Overcoming the limitation of accounting takes precedence of any other attempt to construct the management information systems. Activity Information Accounting System(AIAS) proposes the way of overcoming the limitation of current accounting by using the new accounting methodology and unique solution to real time accounting information. AIAS produces accounting and management information directly of activity information without bookkeeping process of activity information. AIAS adopts method of transforming the details of corporation activities directly into accounting information rather than method of double-entry bookkeeping system. The purpose of this paper is to prove AIAS to be very flexible system by using flexibility concepts. Flexibilities are defined as three aspects, namely ① timeliness (rapid accounting information generations and presentations) ② easy systems modificabilities according to environment changes ③ adaptabilities to all industries.