• ETRI Journal
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• 제37권2호
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• pp.222-232
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• 2015

In this paper, we propose a dual-phase approach to improve the process of heart disease prediction in a mobile environment. Firstly, only the confident frequent rules are extracted from a patient's clinical information. These are then used to foretell the possibility of the presence of heart disease. However, in some cases, subjects cannot describe exactly what has happened to them or they may have a silent disease - in which case it won't be possible to detect any symptoms at this stage. To address these problems, data records collected over a long period of time of a patient's heart rate variability (HRV) are used to predict whether the patient is suffering from heart disease. By analyzing HRV patterns, doctors can determine whether a patient is suffering from heart disease. The task of collecting HRV patterns is done by an online artificial neural network, which as well as learning knew knowledge, is able to store and preserve all previously learned knowledge. An experiment is conducted to evaluate the performance of the proposed heart disease prediction process under different settings. The results show that the process's performance outperforms existing techniques such as that of the self-organizing map and gas neural growing in terms of classification and diagnostic accuracy, and network structure.

• 한국항해항만학회지
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• 제40권2호
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• pp.67-72
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• 2016

Vietnam's sea-port industry has experienced a significant development in recent years. Especially in Northern Vietnam, both the demand and supply of handling services for containerized cargoes have increased at a considerable rates. Accompany with such movement, the competition among container terminals in the area becomes fiercer. In this paper, Hierarchical Cluster Analysis is employed to classify all 11 container terminals in Northern Vietnam by collecting data concerning terminal competitiveness. After the classification, each group will be discussed in order to reveal more details about their competitive characteristics. The paper consists of five sections. Section 1 is the general introduction. Section 2 provides a general literature review about competitiveness and factors to evaluate competitiveness. Section 3 explains variables and methodology applied to do the analysis. Section 4 presents the results with linkage to the current condition. Section 5 summarizes the analysis results. It is shown that container terminals in Northern Vietnam should not only pay attention to their service qualities but also have to find out an appropriate mechanism to avoid unhealthy competition. The paper is expected to contribute a background for further researches in container terminals' competition in the region as well as hints for operators in planning and making decisions.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.876-879
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• 2015

사물인터넷은 사람과 모든 사물이 언제 어디서나 서로 연결된 네트워크를 의미한다. 이것은 기기들이 데이터를 수집하고 서로 공유 및 분석하는 사물 간 능동적 상호작용을 의미하는 것으로 산업전반에 새로운 패러다임의 전환을 제안하게 된다. 특히 의료서비스 분야의 접목이 주목되고 있다. 사물인터넷 기술과 헬스케어 분야의 융합은 모바일 헬스와 웨어러블, 헬스케어 디바이스가 가져오는 변화를 모두 포괄하는 헬스케어 산업의 패러다임 혁신이 될 것으로 기대된다. 따라서 본 연구에서는 사물인터넷과 의료서비스 현황, 그리고 의료분야에서의 사물인터넷 활용사례를 분석한다. 그리고 사물인터넷 기반의 의료서비스의 가장 중요이슈가 되면서도 해결과제인 보안현황을 분석한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.792-800
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• 2007

The annual power cost for Seoul metro operations is about 65.5 billion won, of which rail motors account for 60% among total power consumptions. It is expected that the power consumption would increase because of global warming, future high electric equipments demands, etc. To reduce these consumptions, it is necessary to analyze the transportation demands of passengers, arrange the power-saving driving environments, respond flexible vehicles service, and improve how to drive vehicles. These method to reduce power consumption for rail motors can lead to improve the Seoul metro management. In this research, the improvement plan is derived by collecting and analyzing the data for total 33 power consumptions factors, screening top 10 factors by priority and impact, establishing each hypothesis to execute correlation and recursion analyses. As a result of 4 items research among top 10 affected factors, the power consumption for rail motors in 2006 is effectively reduced; the power usage is down with 13,870 kwh, from 531,539 kwh to 517,669 kwh, and the cost is down with 1,026 million won, from 39, 334 million won to 38,308 million won.

• 유통과학연구
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• 제17권12호
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• pp.55-62
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• 2019

Purpose: The number intelligent homecare products are focused on the development of technology, resulting in a lack of realistic environments or requirements for consumers. The purpose of this paper is to define the consumer and context for intelligent homecare products and to develop a usability evaluation scale. Research design, data and methodology: For this study, first, consumer and contexts related to intelligent homecare products were analyzed through literature review. Second, the primary usability evaluation factors were derived for intelligent homecare products by collecting the factors related to usability evaluation and conducting in-depth interviews with experts. Third, the second usability evaluation factors were derived through survey and statistical analysis based on the derived usability evaluation factors. Results: As a result, users of intelligent homecare products were classified as primary users and secondary consumers and six related contexts. The usability evaluation scale was established with four factors - Functionality, Error, Convenience, and Emotion - and 13 items. Conclusions: This study can be the basis for developing and distributing products that meet the consumer environment and requirements related to intelligent homecare products that will contribute to securing the competitiveness of companies and developing the technology and service value of related industries.

• 대한안전경영과학회지
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• 제8권3호
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• pp.189-199
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• 2006

The purpose of this study is to analyse the job-satisfaction of police officer. The subjects of this study are selected by convenience sampling of random sampling method. The population is male and female incumbent police officers in Seoul and Gyeonggi province. The 347 cases are used to analyse the job-satisfaction among 400 police officers who answer the question. The Jod-Satisfaction Survey(Choi, 2001) are used for collecting data. In consequence of and 4 sub-factors(job-satisfaction) are found. Cronbach's alpha coefficient revealed $.058{\sim}.804,\;.846{\sim}.871$, respectively. For the statistical analysis, SPSS version 12.0 are utilized. The verification of research hypothesis are conducted by T-test, ANOVA, correlation, and multiple-regression. The significance level of all tests are set at .05. The findings of this study can be summarized as follows: Based on the demographic factors, the differences in life-style among police officers are identified. There is significant differences in gender and ages on individualism and accomplishment, in marital status on individualism and fashion-pursuing, and in income level on fashion-pursuing and accomplishment. There is also significant differences in education, religion, position and service period on accomplishment, individualism and fashion-pursuing.

• The Journal of Asian Finance, Economics and Business
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• 제9권6호
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• pp.303-312
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• 2022

Nowadays, omnichannel is a new kind of e-commerce channel. Many retailers invest in this channel to maximize customers' benefits as well as increase competitive advantage and business performance. To operate this channel effectively, the role of IT competence is very important. With the flexibility and integration of IT competence in omnichannel, retailers can optimize service quality and bring customer benefits that are outstanding in comparison with the traditional channel. Because of this significance, this research was carried out to evaluate the effects of IT competence on the business performance of retailers in Vietnam's omnichannel environment through the mediating role of customer value creation and competitive advantage. A quantitative research method is used through a survey with 200 managers working in retail companies operating omnichannel in Vietnam. After collecting data, PLS-SEM software is used to analyze the relationship among these above factors in omnichannel. The results prove that there are positive effects of IT competence on other elements in the research model. All direct and indirect effects are valuable when bootstrapping. Based on the results, some managerial implications are given to managers of retail companies using omnichannel to improve customer values and increase competitive advantage and business performance in the Vietnam context.

• 수산경영론집
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• 제52권1호
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• pp.83-99
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• 2021

Fisheries policies are diversifying, including welfare programs for fishermen, revitalization of earfish and villages, and support for the sixth industrialization of fishing villages. In response to these policy changes, the purpose of this study is to categorize the fishing village fraternity, which is a local community, a fishery production organization, and a basic unit of a fishing village, and compares the characteristics of each type A number of indicators were selected by collecting data on the Categorization and evaluation of fishing villages fraternity and the statistical geographic information service. A number of indicators were extracted as representative factor variables using the principal component analysis, and then cluster analysis was performed to categorize the fishing village fraternity. This study was the first to attempt a comprehensive approach to revitalize the fishing village economy by using not only demographic and social characteristics, industrial and economic characteristics, but also regional characteristics. The characteristics of each type of fishing village fraternity find its significance in that it provides basic information that can be used in policy decisions. In order to strengthen the sustainability of the fishing community in the future and contribute to the sustainable development at the national level, the development of sustainable fishing village fraternity development indicators and follow-up studies on fishing village regeneration strategies will be needed.

• 서비스연구
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• 제13권1호
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• pp.96-107
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• 2023

본 연구에서는 모바일 결제 서비스 이용률이 세계에서 가장 높은 중국 이용자들을 대상으로 어떤 이슈에 관심이 있는지를 미래신호 예측 방법론을 이용하여 예측하여 보았다. 이를 위하여 중국의 SNS 사이트로부터 모바일 결제와 연관된 텍스트 데이터를 수집한 후, 문장에서 추출한 키워드들을 키워드 등장 지도 (KEM: Keyword Emergence Map)와 키워드 이슈 지도 (KIM: Keyword Issue Map)를 이용하여 강신호, 약신호, 잠재신호, 그리고 강하지만 증가율이 낮은 신호로 분류하였다. 한 걸음 더 나아가서 본 연구에서는 4가지 종류의 신호를 구체적으로 이해하기 위해서 각 신호와 연관된 텍스트를 추가적으로 정성적인 분석을 실시하였다. 그 결과, 현재 뿐만 아니라 본 연구 기간 동안 키워드 출현 빈도가 빠르게 성장하고 있는 강신호에는 버스, 지하철, 가계부와 같이 중국인들의 일상생활과 관련된 키워드가 많이 포함되어 있음을 발견하였고, 현재에는 자주 등장하지만 강신호와는 달리 증가율이 낮은 신호에는 홍바오 (현금결제), 은행카드와 같이 현금 결제를 대체할 수 있는 다양한 서비스가 언급되었음을 발견하였다. 다른 신호에 비하여 출현 빈도가 저조한 약신호와 잠재신호에는 서비스 규정 변화나 이벤트와 연관된 키워드들이 포함되었다. 본 연구 결과를 통하여 모바일 결제 서비스는 중국 이용자들에게 편리함을 제공하는 것을 넘어서 그들의 일상생활을 크게 변화시켰음을 알 수 있었다. 그리고 신용카드 결제가 보편화되지 않은 중국에서 모바일 결제 서비스는 현금결제를 완전히 대체할 수 있는 서비스로 성장할 가능성이 높음을 알 수 있었다.

• 대한원격탐사학회지
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• 제39권5_2호
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• pp.811-825
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• 2023

데이터 활용을 통한 지능형 행정서비스 정책을 적극적으로 추진하고 있는 정부 기조에 따라, 재난안전관리 분야도 신종·복합재난에 효율적으로 대응하기 위한 데이터 기반의 상황관리시스템을 구축·운영하고 있다. 하지만 재난 상황 발생 시 현장 상황 파악에 어려움이 있고, 방대한 데이터의 표출만으로는 상황판단 및 수습·대응에 필요한 정보를 제공하는 데 여전히 한계가 있다. 본 논문은 재난안전상황실 근무자의 상황관리 업무에 대해 지능정보기술을 활용하여 지능화 및 효율화에 필요한 구체적인 기술 도출을 목적으로 한다. 중앙재난안전상황실 근무자를 대상으로 개별 면담 및 조사를 통해 재난 상황관리 업무 범위와 GIS 통합상황관리시스템의 활용 상황 및 시스템에 구축된 데이터의 용도와 특징을 조사·분석하였다. 그리고 상황관리 업무의 지능화 및 효율화에 필요한 기술을 도출하기 위하여 신속·정확한 현장상황 파악, 데이터 기반 상황판단, 효율적 상황관리 업무 지원을 전략으로 하여 실행과제를 정의하고, analytic hierarchy process (AHP) 분석을 통해 실행과제의 중요도를 평가하여 우선순위를 결정하였다. 그 결과 상황관리 효율화를 위해서는 영상 및 센서 데이터에 대한 수집·분석·관리와 사람이 수행하는 경우 많은 시간이 소요되거나 오류가 있을 수 있는 작업, 즉 상황관련 자료 수집 및 보고서 작업에 지능정보기술 활용이 필요한 것으로 분석되었다. 결론적으로 상황관리 지능화 전략 가운데 중요도가 높은 신속하고 정확한 현장상황의 파악과 효율적 상황관리 업무 지원이 우선적으로 상황관리 지능화 기술 개발 대상으로 추진할 수 있을 것이다.