• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.230-237
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• 2022

The Community Social Service Investment project started as a state subsidy project in 2007 and has grown very rapidly in quantitative terms in a short period of time. It is a bottom-up project that discovers the welfare needs of people and plans and provides services suitable for them. The purpose of this study is to analyze using big data to determine the social response to local community service investment projects. For this, data was collected and analyzed by crawling with a specific keyword of community service investment project on Google and Naver sites. As for the analysis contents, monthly search volume, related keywords, monthly search volume, search rate by age, and gender search rate were conducted. As a result, 10 items were found as related keywords in Google, and 3 items were found in Naver. The overall results of Google and Naver sites were slightly different, but they increased and decreased at almost the same time. Therefore, it can be seen that the community service investment project continues to attract users' interest.

• 한국안전학회지
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• 제28권6호
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• pp.42-48
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• 2013

Forensic engineering is the application of engineering principles covering the investigation of constructed facilities and systems that fail to perform as intended, causing personal injury or damage to property, environmental, economy etc. In the year 2012, two collapsed accidents of the large scaffolding system in national thermal power station occurred one after another, causing many casualties. In this study, we had performed to investigate the collapsed accident of scaffolding system occurred in the a thermal power station of two accidents. First, the investigation about the collapsed accidents site had performed to understand collapsed state and structures of the scaffolding system. Second, reviewing the materials concerning about the applied weight on the scaffolding system had performed. The applied weight is sum of the weights of the 15 workers, additional materials for coating work and dispersed and loaded shot ball on the foothold etc. the applied weight that calculated exceed more three times than the safe working load. Third, we had confirmed the install state of the materials of the scaffolding system by reviewing the quantity of the materials on the manual and the real system. Last, structural analysis had performed to evaluate structural integrity of the scaffolding system using Ansys. Through a series of this processes, the definite accidents causes of the collapsed scaffolding system revealed. Through these studies, the collapse accident that may occur in the scaffolding system in thermal power station can be minimized by performing specialized and systematic investigation on the accidents in terms of Forensic engineering.

• 한국멀티미디어학회논문지
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• 제9권7호
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• pp.914-926
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• 2006

현재 국내 물류부문은 산업 전반의 정보화 추세에 따라 물류정보화에 대한 요구가 증가하고 있다. 그러나 대다수의 물류업체들은 물류 프로세스의 비효율성, 물류 유통단계의 과다, 높은 공차 율, 경쟁 제한적 제도등의 문제점으로 인하여 영세성을 벗어나지 못하고 있으며, 고객이 원하는 수준의 물류서비스를 제공할 만한 사회적 인프라나 정보 기술 능력을 갖추지 못하고 있는 실정이다. 영세한 물류업체들이 대형 물류업체나 해외 물류업체들에 대한 경쟁력을 갖추기 위해서는 현재 기업체들이 제공하고 있는 서비스의 품질과 동등 혹은 그 이상의 서비스를 제공할 수 있어 야 한다. 그러나 이는 현실적으로 매우 어려운 일이다. 본 논문에서는 그러한 영세 물류업체들이 위치기반 서비스(Location Based Service: LBS)와 물류정보 송수신 서비스를 웹 기반의 ASP(Application Service Provider) 서비스 형태로 제공받아 경쟁력 향상과 고객서비스 품질을 개선할 수 있도록 SMS와 GPS를 차량 상태정보 및 위치관제 시스템을 설계 및 구현하였다.

• 한국정보통신학회논문지
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• 제21권11호
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• pp.2115-2120
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• 2017

시스템 가시성평가는 복잡한 시스템과 고도의 신뢰성 분야인 In-Vehicle 산업에서 하드웨어 및 소프트웨어간의 융합과 역할 변화에서 시작되었다. 융합의 중심이 기술에서 문화로 자연스럽게 스며드는 형태로 진화하고 있다. 문화의 주변에 기술의 생태적 특징을 반영하기 위해 유니버설미들웨어의 장점인 생명주기모델을 활용하여 시스템의 가시성을 높이고 직관적 판단을 유도하여 혼란 상태를 대비할 수 있다 .본 연구에서는 유니버설미들웨어 기반의 데이터와 서비스모듈을 유기적으로 표준화 및 안정화하여 시스템 가시성 엔진을 시험하고 평가하였다. 이 모듈은 Intelligent Pervasive Cloud 모듈, Memorial Service 모듈, Life Cycler 모듈로 구성하고 현재와 미래의 통신표준과 응용서비스 표준을 비롯한 다양한 요구사항을 반영하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4398-4417
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• 2017

Multi-user Multiple-Input and Multiple-Output (MU-MIMO) has potential for prominently enhancing the capacity of wireless network by simultaneously transmitting to multiple users. User selection is an unavoidable problem which bottlenecks the gain of MU-MIMO to a great extent. Major state-of-the-art works are focusing on improving network throughput by using Channel State Information (CSI), however, the overhead of CSI feedback becomes unacceptable when the number of users is large. Some work does well in balancing tradeoff between complexity and achievable throughput but is lack of consideration of fairness. Current works universally ignore the rational utilizing of time resources, which may lead the improvements of network throughput to a standstill. In this paper, we propose TOUSE, a scalable and fair user selection scheme for MU-MIMO. The core design is dynamic-time-warping-based user selection mechanism for downlink MU-MIMO, which could make full use of concurrent transmitting time. TOUSE also presents a novel data-rate estimation method without any CSI feedback, providing supports for user selections. Simulation result shows that TOUSE significantly outperforms traditional contention-based user selection schemes in both throughput and fairness in an indoor condition.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2004년도 추계학술대회 및 정기총회
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• pp.304-316
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• 2004

When new services are introduced, one of the drivers for market performance of them is the interactions among existing and new services. They are characterized by the substitution or complementary effects among existing and new service or the cannibalization of existing services by new services. This paper analyzes these issues in the telecommunications service industry context. To analyze them, a simple graphical tool or State Transition Diagram(STD) is developed and used. The diagram helps to clearly represent and explain the substitution, complement and cannibalization impact. Then, using the face-to-face survey of 1,200 people, a new wireless internet access service or WiBro is analyzed to identify the substitution/complement and cannibalization impacts in relation with the other competing services. Additionally, the important factors explaining customer subscription and substitution behavior are identified. The analysis results indicate that males, students or on-line game users are more likely to subscribe WiBro. Also, among the potential WiBro subscribers, customers who are less satisfied with the existing fixed line broadband internet access services are more likely to stop subscribing the fixed line service, which implies substitution by a new service. Additionally, this raises the issue of cannibalization if the existing and new services are provided by the same company. In fact we find the cannibalization effect is more serious for the cost sensitive group. We believe that our tool, approach, analysis results and their implications would be very helpful to devise a winning strategy for the new services in the highly uncertain telecommunications business environment.

• Journal of Computing Science and Engineering
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• 제6권2호
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• pp.89-104
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• 2012

In dynamic Web service environments, the performance of the Internet is unpredictable; the reliability and effectiveness of remote Web services are also unclear. Therefore, it can hardly be guaranteed that the quality of Web service (QoWS) attributes of Web services do not fluctuate with the dynamic Web service environments. When a composite service is planned in the context of dynamic service environments, there is another aspect which has not been taken into account by existing works, namely, concurrency - the fact that multiple requests to a composite service may arrive at the same time. Considering the dynamics of Web service environments and concurrency of requests, we propose in this paper a service selection scheme which adopts top-k dominating queries to generate a composition solution rather than only select the best composition solution for a given request. The experimental results have investigated the efficiency and effectiveness of our approach and shown that it outperforms baseline and traditional methods for service selection.

• 정보관리연구
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• 제39권2호
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• pp.75-94
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• 2008

국내 대학도서관들은 첨단 기술의 발전을 수용하고 이를 기반으로 하는 정보서비스의 기획 및 제공을 통해 도서관 서비스의 발전을 주도하고 있으며, 해당 기관 내에서 정보유통의 중심으로서 도서관의 위상을 공고히 하는 데 기여하고 있다. 본 고에서는 국내 대학도서관들에서 무선인터넷을 통해 제공하고 있는 도서관 정보서비스의 현황을 살펴보고자 한다. 이를 위해 다수 도서관이 참여하고 있는 협의체인 'WDL 모바일 캠퍼스 컨소시엄'을 통해 주도되고 있는 무선인터넷 서비스의 일반현황, 플랫폼의 구성, 서비스의 구성과 주요기능, 이용환경과 현황을 살펴보고 지속적인 발전을 위한 발전방안을 제시하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제27권4호
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• pp.371-384
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• 2008

The purposes of this study were to investigate perspective teachers' conceptions of liquid-state and get implications for the direction of science curriculum or professional development. The instrument was composed of seven questions focusing on aspects of liquid-state phenomena. The results showed that the participants have various alternative concepts about liquid-state. The problem revealed in almost every question was their macroscopic explanations for the phenomena. In addition, it appeared that the participants seemed to understand phenomena in terminology level, but they didn't know basic reasons or fundamental concepts about the phenomena. It is required to change the curriculum or instructional methods in secondary school and teacher education programs to anchor the scientific concepts on molecular or microscopic level.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.103-107
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• 2021

The article analyzes the theoretical aspects of the relationship between the right to medical secrecy and the employer's right to receive information on the employee's state of health, resulting in a more complete description of the implementation of the right to medical secrecy and the employer's right to information on the employee's health state and the possibilities of protecting violated rights. The limits of permissible restrictions on the right to secrecy of health in terms of ensuring the person's performance of their job function have been clarified.