• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 가을 학술발표회 논문집
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• pp.607-614
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• 2000

A cost-effective automated slope monitoring system is developed to monitor hazardous cut slopes along highways. This automated slope monitoring system consists of data-collection and visual monitoring, data-transmitting, database and internet service, and alarm system. Wire-line extensometer, automatic raingauge, and CCD camera are selected as monitoring instruments in this system, after consideration of failure characteristics of roadside cut slopes in the country. This paper describes the important features of this newly developed automated slope monitoring system.

• Journal of Communications and Networks
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• 제3권4호
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• pp.324-333
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• 2001

The Differentiated Services (Diffserv) framework has been proposed by the IETF as a simple service structure that can provide different Quality of Service (QoS) to different classes of packets in IP networks. IP packets are classified into one of a limited number of service classes, and are marked in the packet header for easy classification and differentiated treatments when transferred within a Diffserv domain. The Diffserv framework defines simple and efficient QoS differentiation mechanisms for the Internet. However, the original Diffserv concept does not provide a complete QoS management framework. Since traffic flows in IP networks are unidirectional from one network point to the other and routing paths and traffic demand get dynamically altered, it is important to monitor end-to-end traffic status, as well as traffic status in a single node. This paper suggests a distributed QoS monitoring method that collects the statistical data of each service class in every Diffserv router and calculates edge-to-edge QoS of the aggregated IP flows by combining routing topology and traffic status. A format modeling of edge-to-edge Diffserv flows and algorithms for aggregating edge-to-edge QoS is presented. Also an SNMP-based QoS management prototype system for Diffserv networks is presented, which validates our QoS management framework and demonstrates useful service management functionality.

• International Journal of Advanced Culture Technology
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• 제4권3호
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• pp.13-19
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• 2016

The growth of mobile devices in Internet of Things (IoT) leads to a number of remote and controlling system related IoT applications. For instance, home automation controlling system uses client system such web apps on smartphone or web service to access the home server by sending control commands. The home server receives the command, then controls for instance the light system. The web service gateway responsible for handling clients' requests attests an internet latency when an increasing number of end users requests submit toward it. Therefore, this web service gateway fails to detect several commands, slows down predefined actions which should be performed without human intervention. In this paper, we investigate the performance of a web server-side platgorm based event-driven, non-blocking approach called Node.js against traditional thread-based server side approach to handle a large number of client requests simultaneously for remote and controlling system in IoT remote monitoring applications. The Node.JS is 40% faster than the traditional web server side features thread-based approach. The use of Node.js server-side handles a large number of clients' requests, then therefore, reduces delay in performing predefined actions automatically in IoT environment.

• 산업경영시스템학회지
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• 제17권32호
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• pp.145-154
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• 1994

In this paper, monitoring processor in a circuit switched network is considered. Monitoring processor monitors communication links, and offers a grade of service in each link to controller. Such an information is useful for an effective maintenance of system. Two links with nonsymmetric system Parameters are considered. each link is assumed independent M/M/1/1 type. The Markov process is introduced to compute busy and idle portions of monitoring processor and monitored rate of each link. Inter-idle times and inter-monitoring times of monitoring processor between two links are respectively computed. A recursive formula is introduced to make computational procedure rigorous.

• 한국전자거래학회지
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• 제14권3호
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• pp.59-70
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• 2009

유비쿼터스 컨버전스 산업의 가능성을 확인하기 위한 시험대로서 u-City에 대한 관심이 지속적으로 커져가고 있는 시점에서, u-City의 대표적인 서비스 및 응용 분야로서 u-방재에 대한 연구도 서서히 확대되어가고 있다. u-City의 다른 영역과 마찬가지로 u-방재 서비스의 원활한 제공을 위해서는 기존에 분산되어 운영되고 있는 다양한 u-City 서비스 및 하부 인프라가 종합적으로 연계될 수 있는 방법이 매우 중요하다. 본 연구에서는 분산자원관리 분야에서 널리 활용되고 있는 CIM/WBEM 표준과 대용량 모니터링 데이터의 취득 및 활용에 적절한 모델로 인정되고 있는 GMA를 결합하여 u-방재 서비스 및 모니터링 아키텍처의 설계에 적용하는 방안을 제시하고자 한다. 향후 u-City 서비스 인프라의 표준화 및 확장성에 대한 요구가 더욱 커져갈 것으로 예상된다는 점에서, 본 연구에서 제시하는 통합 인프라 모델은 기존에 구축되어 있는 분산자원들과 지속적으로 추가될 것으로 예상되는 신규 서비스들의 효과적인 통합 모델로써 활용될 수 있을 것이다.

• 디지털융복합연구
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• 제10권8호
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• pp.185-192
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• 2012

전 세계적으로 인구 고령화와 만성질환의 증가로 건강관리에 대한 관심이 높아지고 ICT기술의 발달로 인하여 유헬스 서비스가 증가하고 있다. 기존의 유헬스 서비스는 상담을 통한 서비스나 건강정보의 모니터링만을 제공하여 심혈관질환등의 만성질환자를 예방하거나 관리하는 것에는 한계가 있다. 본 논문에서는 유헬스 플랫폼 기반의 상황정보를 활용한 건강관리 서비스 모델를 제안한다. 제안하는 서비스 모델은 유헬스 플랫폼 환경에서 임상정보 및 날씨 등의 상황 정보를 활용하여 건강 모니터링 및 운동, 식이 서비스를 제공한다. 제공하는 서비스는 외부콘텐츠 제공자의 DB를 사용하는 전문적인 서비스이다. 또한, 의사는 모니터링 서비스를 이용하여 질환자에게 권고정보를 제공할 수 있다. 제안하는 서비스 모델은 서비스 대상자에게 유헬스 플랫폼 환경에서 상황정보를 활용한 효과적인 서비스를 제공하여 만성질환자의 건강증진에 기여할 것으로 기대된다.

• 한국통신학회논문지
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• 제38B권2호
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• pp.105-114
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• 2013

인체영역 무선네트워크(WBAN)기술 기반의 생체정보 모니터링서비스의 확장과 성장은 생체신호 감지 및 측정, 생체정보의 원격제어, 실시간 모니터링기술의 진화를 가속화시키고 있다. 기술진화에 대응한 선행기술 확보와 시장선점을 위해 생체정보 모니터링 시스템의 설계 및 구축은 최신 기술 동향과 표준화 이슈의 전략적인 반영이 필수적이다. 논문은 기술 및 연구개발 동향과 이슈를 조사, 분석하고 기술적 대응과제를 제시한다.

• KSBB Journal
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• 제26권5호
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• pp.412-416
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• 2011

The conventional monitoring system for water pollution measurement is quite simple and independent and it has a lot of draw backs such as cost, installation, etc. So, in this paper, we have measured the water pollution system through a bacterial species, photobacterium phosphoreum. A novel integrated monitoring system technology has been developed which could easily dictate and analyze the major water pollutants and its surrounding environment in an accurate way. The system constitutes of bionic technology, information technology and environmental engineering technology. As a result, integrated monitoring system can observe the water pollution and various water environment of the whole country. Also, through the sensors of USN, Zigbee, RFID and middle ware, which can provide service and construct service platform, a properly standardized plan with remarkable service platform has been established through this investigation.

• 대한수의학회지
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• 제48권1호
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• pp.39-48
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• 2008

Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are ubiquitous and can contaminate the food chain. A study monitoring PCDD/Fs in imported meat was conducted at the National Veterinary Research and Quarantine Service (NVRQS, Republic of Korea) in order to maintain food safety from the bioaccumulative PCDD/Fs. Seventeen PCDD/Fs with toxic equivalency factors (TEFs) established by World Health Organization (WHO, 1998) were analyzed in imported beef, pork, and chicken by high resolution gas chromatography/mass spectrometry (HR-GC/MS). Results of the monitoring for the last 5 years are presented. The levels of PCDD/Fs were similar to other studies except two unusually high concentrations in pork and beef. Excessive levels greater than the Korean provisional maximum residue limit of PCDD/Fs were found in a sample of pork imported from Chile and a sample of beef imported from U.S, and those products were rejected and returned. There was no obvious trend or differences with respect to time or origin of meat in this study.

• 한국IT서비스학회지
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• 제13권4호
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• pp.189-203
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• 2014

With the evolution of Internet technologies and the increasing variety of Internet devices, advertisements in various web services have also expanded. Interactive web services often go hand in hand with effective advertisements for a business model. We estimated statistical parameters of the interactive web server for service monitoring and advertisement-effect. In the web pages, we integrated the plugins of social networking services (SNSs) (e.g. Facebook, Twitter) and an advertisement scheme (e.g. Google AdSense) that regards social name-directory contents. Empirical data analysis and statistical results are presented with the implementation of estimations of parameters (e.g. utilization-level and serviceability) and advertisements in a social networking name-directory service (http://ktrip.net or http://한국.net). We found that estimated parameters were applicable to service monitoring of web-server as well as to synthesis of advertisement-effect in our social-web name-directory service.