• 한국멀티미디어학회논문지
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• 제20권8호
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• pp.1379-1386
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• 2017

As the Internet of Things evolves, various IoT services are provided. IFTTT is an abbreviation for If This Then That and refers to a service that links different web-based services. This paper proposes a system that generates and manages rules that combine the possibility of IFTTT service and the real-time event processing according to the concept of IoT service. Conventional database-based data processing methods are burdened to process a lot of data of IoT devices coming in real-time. The IoT device's data can be classified into formal data such as the amount of power, temperature value and position information, and informal data such as video or image data. Thus, this system classifies the data stream of IoT devices coming in real-time using the CEP engine Esper into a file signature table, classifies the formal/informal data, and shows the condition of the device data defined by the user and the service to be provided by applying the service.

• 산업경영시스템학회지
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• 제20권42호
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• pp.31-38
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• 1997

The main objective of this research is to develop a model to select the optimal input service level for a distribution center - multi branch inventory distribution system. With the continuous review policy, the distribution center places an order for specific order quantity to an outside supplier, and the order quantity is replenished after a certain lead time. Also, each branch places an order for particular order quantity to the distribution center to satisfy the customer demands, and receives the replenishment after a lead time. When an out of stock condition occurs during an order cycle, a backorder is placed to the upper level to fill the unfilled demands. With these situation, variable demand and variable lead time are used for better industrial practice. Further, actual lead times with a generic lead time distribution are used in developing the control model. Under the actual lead time model, the customer service measures actually attained for the distribution center and each branch are explained as the effective customer service measures. Thus, throughout the optimal control (using computer search procedures), we can select the optimal input service levels for the distribution center and each branch to attain the effective service level for each branch which is consistent with the goal level of service for each branch. At the same time, the entire distribution system keeps minimum inventories.

• 한국정보통신학회논문지
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• 제8권8호
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• pp.1670-1678
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• 2004

현재 가격비교 사이트에서는 관련 쇼핑몰 회사들이 가격비교 사이트에 가입하여 수동으로 상품정보와 가격을 입력하여야 하며, 또한 상품가격을 자동으로 실시간 가격변동을 지원할 수 없는 문제점이 있다. 따라서 본 논문에서는 웹 서비스 기술을 이용하여 실시간의 능동적인 상품 가격비교 및 직접 상품 주문에 대한 SOAP기반의 동적 상호작용 웹 서비스 시스템을 설계 및 구현하였다. 본 연구의 웹 서비스 시스템은 크게 상품검색, 상품정렬과 상품주문을 지원하는 웹 서비스 클라이언트 모듈과 상품검색과 상품주문 원격 프로시저 호출을 포함하는 서버모듈로 나누어진다. 본 웹 서비스 시스템은 SOAP 메시지 기반으로 상호 정보를 교환하도록 구현하였으며, 사실표준 환경인 SOAP, WSDL, UDDI 표준을 따르는 모든 환경에서 이식가능하고, 플랫폼에 독립적으로 지원할 수 있다.

• 한국정보처리학회논문지
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• 제7권9호
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• pp.2930-2939
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• 2000

공중통신망을 통한 데이터 송수신율 효율적으로 제공하기 위하여 AO/DI란 서비스가 제안되고 있다. TDX-10A교환기에 의해 AO/DI서비스를 제공하고자 할 때 TDX-10A 교환기의 패킷처리용량이 AO/DI 서비스를 제공하기에 충분한 지를 분석하는 것이 필요하다. 시뮬레이션에 의해 분석한 결과 TDX-10A 교환기에 설계목표치인 50,000 ISDN 가입자가 수용될 때 AO/DI 서비스 가입자의 비율이 29% 정도가 될 때 까지는 현재의 교환기에 의해 서비스될 수 있으나 그 이상이 될 때에는 시스템의 패킷처리용량을 증가시킬 필요가 있음을 알 수 있다.

• 산업공학
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• 제17권1호
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• pp.93-103
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• 2004

Service importance has been growing increasingly as competition element of enterprises according to going on rapid softness, information and knowledge of industrial infrastructure recently. Quality management system that implemented in manufacturing sector have been spreading rapidly to service company, but the company performing pure engineering service only in construction fields performed mainly the evaluation on the operational aspect such as degree of implementation of the established system because it is difficult to objective evaluation on the activity of the established quality management system or quality assurance system. This study would like to make on offer the improvement points based on the evaluation of service quality and the itself evaluation result through the questionnaire on the service offerers and customers using the pre-qualified SERVQUAL model in establishment of the improvement goal of the company. According to the result of this study, it is analyzed a gap and required to establish a counter-plan to correct many gaps discovered between the real offered level and the expect level of custom.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 춘계학술대회
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• pp.281-294
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• 2009

Recently the information system introduction and the application which use the computer are increasing. The efficient operation of information system helps corporations to improve productivity, customer service and corporate competitive power. SaaS(Software as a Service), which is the developed type of outsourcing in the area of information technology, is to use standardized and packaged application by hosting from the outside of enterprise. SaaS is not developed yet as much as people's interest about that in the initial stage, but its related technology and service capacity are accumulated after repeated trial and error, and it's ready to activate the industry. In the area of information system, studies on the measurement of service quality were followed. But there is little study on service quality measurement in the field of SaaS(Software as a Service). The purpose of this study was to divides the SaaS with e-SERVQUAL and it consider the relationship with the perceived recognition and the usage intention. According to this, variables of traditional research were rejected because SaaS is not developed yet in Korea. But information had a strong effect on perceived recognition. Therefore, business related with in SaaS must have provided a correct information about various applications.

• 한국동물위생학회지
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• 제40권4호
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• pp.245-251
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• 2017

Cold air or ice water are used to chill poultry carcasses after slaughter. In order to compare the microbial reduction effect of two different chilling systems in poultry carcasses, Pre-and post-chilled carcass samples were tested for contamination agents such as aerobic bacteria counts, E. coli counts and Salmonella spp. counts. Water chilling system showed higher reduction ratio of bacteria than air chilling system during the three seasons. Also, aging of slaughter facility was related with bacterial contamination of pre-chilld carcasses. And additional volatile basic nitrogen (VBN) test were conducted in poultry packing meats and it increased steadily during 15 days. VBN at 8~9 days were over 13 mg% with putrid smell. Poultry packing meats by water chilling system were fresher than air chilling system during early storage time. But those decayed faster after 9 days.

• Journal of Information Technology Applications and Management
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• 제15권1호
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• pp.117-137
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• 2008

Using the service innovation system model, the development of Korean online game industry is analyzed. The model proposed by Gallouj (2002) is modified in order to reflect IT service characteristics such as network externalities. Success factors and innovations patterns of Korean online game industry are examined. First, at the early stage of her growth, Korean online game industry was not supported or coordinated by any Government policies unlike DRAM, CDMA or TFT-LCD. Many parts of technical and service innovations were unintentionally initiated by online game developing ventures without predeterminde strategies. Second, the online game industry is basically a service industry so that users' needs and technical and service characteristics are intertwined to produce innovation. The innovation system of the online game industry is quite different from conventional product technological innovation systems in a sense that there are no blueprints for innovation as well as major players in the system. Third, Government's policies for promotion of IT industry such as the broadband infrastructure installation policy, the hi-tech venture promotion policy and the military exemption policy contributed greatly to development of the online game industry. However, these policy tools were not intended for online game industry but in the end gave a great impact on the service innovation system of the online game industry.

• Journal of Computing Science and Engineering
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• 제2권4호
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• pp.412-427
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• 2008

We propose ID-exchange protocol for Connectionless Location-Awareness Service (CLAS) to locate mobile nodes in indoor sensor network. When adapting location-awareness service to sensor network, the target system must be designed in accordance with various metrics which reflect the system requirement. We especially consider sustainability of the existing service which has been provided for its original purpose, such as environmental monitoring. The detailed meaning of sustainability here is that, even if location-awareness service is newly added to the existing service, the system must be assured to retain a stable network condition, and to deal with newly caused traffic properly. The CLAS ID-exchange protocol is especially designed for fixture and mobile nodes communication to achieve these properties. The protocol operates on 802.15.4 MAC layer to make mobile node work independently of the procedure to build routing table of fixture node, so a stable routing condition can be achieved even if there are many mobile nodes. Moreover, the dedicated frequency channel is assigned only for this protocol, so that traffic caused by location-awareness service can be distributed to another channel. A real system adapting the protocol was implemented to monitor fire and authorities' positions. We verified the overhead and elapsed time for location-awareness. The result shows the proposed protocol has a high performance in detecting speed, traffic distribution, and stability of overall network.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.661-668
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• 2005

본 논문에서는 웹 서비스 기술을 이용하여 동적으로 가격비교를 위한 SOAP기반 유/무선 웹 서비스 시스템을 설계 및 구현하였다. 본 웹 서비스 시스템은 크게 상품검색, 상품정렬, 상품주문과 UDDI 검색 브라우저를 지원하는 웹 서비스 클라이언트 모듈과 상품 검색/주문 원격 프로시저와 UDDI 게시 브라우저를 포함하는 서버모듈과 무선 환경에서 상품 검색/주문을 지원하는 모바일 클라이언트 모듈로 나누어지며, SOAP 표준 환경기반으로 상호 정보를 교환하도록 구현하였다. 따라서 사실표준 환경인 SOAP, WSDL, UDDI 표준을 따르는 모든 환경에서 이식가능하며, 플랫폼에 독립적으로 지원할 수 있다.