• 디지털융복합연구
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• 제9권5호
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• pp.253-263
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• 2011

본 연구는 국내의 중 고교생이 많이 사용하는 온라인 교육사이트의 서비스품질을 측정하는데 있어서 SERVPERF모형과 KS-SQI모형 중에서 어느 것이 더 적합한지를 비교 분석하였다. AMOS7을 이용하여 분석한 결과, SERVPERF모형에서 서비스품질은 신뢰성, 유형성, 반응성, 공감성, 확산성으로 측정하는 모형으로 나타났다. 또한 KS-SQI모형의 서비스품질은 본원적 서비스와 예상외 서비스로 구성된 성과차원과 신뢰성, 친절성, 적극지원성, 접근용이성, 매체유형성으로 구성된 과정 차원으로 구성된 측정모형으로 나타났다. 두 모형간 비교에서는 KS-SQI가 경로분석에 대한 모형적합도 측면에서 더 우수한 것으로 나타났다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권6호
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• pp.2463-2482
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• 2016

Cloud services are often provisioned to their customers using user-friendly web browsers with flexible and rich plug-in environments. Delay is one of the fundamental performance metrics of these web-based services. Commonly-used network measurement tools usually only measure network delay and it may be difficult to infer the web-delay performance using only network layer measurement approaches. In this paper, we propose to evaluate the application layer delay in a browser-based network measurement platform using engineered scripts. We conducted a delay measurement study using instrumented scripts in the proposed browser-based measurement platform. Our investigation included a comparison study of three browser-scripting delay measurement methods, including Java applet, JSP and Flash ActionScript. We developed a browser-based delay measurement testbed over the Internet so that different delay measurement tools could be evaluated in the same real network environment including typical Internet paths and the Baidu cloud. We also decomposed the components of the end-to-end delay process of the above measurements to reveal the difference and relationship between the network-layer delay and the application-layer delay. Our measurement results characterize the stochastic properties of the application-layer delay over real Internet paths, and how these properties vary from the underlying network layer delay. This browser-scripting measurement approach can be easily deployed on different cloud service platforms to inspect their application-layer delay performance between end clients and the cloud platforms. Our measurement results may provide insights into designing new cloud services with enhanced quality-of-experience perceived by cloud users.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2005년도 추계 종합학술대회 논문집
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• pp.611-615
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• 2005

본 논문은 향후에 구축될 BcN망을 통해 제공될 멀티미디어 서비스를 위한 QoS를 보장하기 위해 서비스를 분류하고 풀질기준과 측정방법을 분석한다. 현재의 서비스 및 향후 BcN에서 제공될 서비스를 분류하였고, 종단간 품질기준을 살펴보고, 종단간 품질측정을 위한 측정방안으로서 호성공률, 패킷손실율, 단방향지연, 지터, R-값 등의 측정방법을 소개하였다.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2006년도 춘계학술대회
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• pp.54-65
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• 2006

Since the ending of the IMF period, the Korean health industry has experienced a number of changes in its environment such as hospital bankruptcy, enforcement of SDF(Separation of Dispensing and Prescription), opening of the medical market by WHO, evaluation of medical institutions with more than 100 sick beds, and limited approval for medical service advertisement. Furthermore, the concept of medical service has changed from a beneficent and vortical one to a hi lateral and righteous one. These changes in medical service have required medical institutions to provide customers with medical service options and adopt market principles actively, while considering customer satisfaction. Thus, this paper aims to investigate the service quality and service value of medical institutions, to understand the mutual relationship between customer satisfaction and repeat visits, and to suggest better solutions for the improvement of service quality. For future studies, It will be necessary to overcome the limitations of this research and develop proper measurement tools on service quality in the Korean medical system.

• 한국산학기술학회논문지
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• 제19권12호
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• pp.709-716
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• 2018

한국건설기술연구원은 건설 및 엔지니어링업체의 기술경쟁력을 높이기 위해 건설기술 디지털도서관시스템(CODIL)을 운영하고 있고, CODIL의 이용자 만족도를 높이기 위한 일환으로서 매년 설문조사를 실시하였다. 하지만, 설문조사를 통해 얻은 만족도 점수를 가지고서 단순히 이용자 만족도의 수준을 설명하였기 때문에 만족도 개선을 위한 전략을 수립하는데 부족함이 있어 이용자의 만족도를 객관적으로 측정할 수 있는 새로운 연구모형이 필요하였다. CODIL의 서비스 품질 측정에 적합한 연구모형을 설계하기 위해 도서관의 서비스 품질과 관련한 SERVQUAL, LibQUAL+, DigiQUALTM에서 사용한 항목들을 조사하여 조사된 항목들 중 CODIL의 특성을 반영할 수 있는 항목들을 선정하였다. 다음으로, CODIL 회원을 표본으로 한 설문조사 결과를 가지고서 독립변수들과 종속변수 간의 상관관계를 측정하였고, 이용자 만족도에 영향을 미치는 유의한 측정 항목들과 영향력을 분석하였다. 본 연구결과는 다른 전문 분야에서의 디지털 도서관의 서비스 품질을 개선하는데 유용한 기초자료로 활용할 수 있을 것으로 사료된다. 추가적인 연구로는 CODIL의 서비스 측정에 사용된 측정항목들과 응답자의 인구통계학적 특성간의 상관관계의 통계량을 계산하여 유의한 독립변수들이 이용자 만족도에 미치는 영향정도를 분석할 필요가 있다.

• 디지털콘텐츠학회 논문지
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• 제13권4호
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• pp.625-629
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• 2012

NGN 운용과정의 품질 보증을 위해 어떤 체계하에서 품질이 테스트 되어야 하는지 방법론을 도출하기 위해서 멀티미디어 트래픽을 중심으로 NGN 품질측정 프레임워크를 제시한다. 테스트베드는 NGN 운용과정에서 QoS 측정 메트릭스, 측정구간과 측정계위, 측정도구, 측정장비, 측정방법 및 측정결과 분석에 대한 일련의 프로세스와 방법론을 모델화한다. 이 모델은 향후 NGN 품질보증 활동에 활용토록 한다. 통신서비스 품질은 스스로 보장되지 않으며 끊임없이 측정되고 관리될 때에 만 품질 목표수준 확보가 가능하다. NGN 네트워크기술 패러다임 중요성을 감한할 때 NGN 운용상의 품질관리에 대한 연구는 앞으로 활발하게 추진되어야 할 핵심 소재이다.

• 전기학회논문지P
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• 제61권2호
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• pp.103-109
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• 2012

This paper analyzed major factors affecting video quality in IPTV (Internet Protocol TV) services in multicasting under our lab network environment similar to practical IPTV service networks. We measured video qualities for the broadcasting traffics in IPTV multicasting with or without applying QoS (Quality of Service) technique. The measurements allowed us to extract thresholds of network measurement factors affecting the quality for the service. It will be a good choice that the factors can be a reference to ensure stable video quality for practical IPTV services in multicasting.

• 한국안전학회지
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• 제23권5호
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• pp.30-34
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• 2008

To evaluate the mechanical properties of in-service materials, tensile properties measurement using small-scaled specimen has been carried out. Tensile testing specimens with various dimensions, including standard and sub-size specimen specified in ASTM and ISO and small-scaled specimen, were prepared. Tensile strain in small-scaled specimen was measured using micro-ESPI system set up in this study. This system was used in the specimen with the parallel length of 2 mm and in subsequently measuring the strain under tensile loading. From each type of tensile specimen, stress-strain curves were determined. The dimension effect of the tensile properties was investigated comparing the tensile results obtained from standard specimens and small-scaled specimens. It was shown that the tensile strength for the small-scaled specimen is lower by 15% than those for the standard specimen.

• The Journal of the Acoustical Society of Korea
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• 제28권3E호
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• pp.99-108
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• 2009

In this paper, we suggest criteria for objective measurement of speech quality in mobile VoIP (Voice over Internet Protocol) services over wireless mobile internet such as mobile WiMAX networks. This is the case that voice communication service is available under other networks. When mobile VoIP service users in the mobile internet network based on packet call up PSTN and mobile network users, but there have not been relevant quality indexes and quality standards for evaluating speech quality of mobile VoIP. In addition, there are many factors influencing on the speech quality in packet network. Especially, if the degraded speech with packet loss transfers to the other network users through the handover, voice communication quality is significantly deteriorated by the transformation of speech codecs. In this paper, we eventually adopt the Gilbert-Elliot channel model to characterize packet network and assess the voice quality through the objective speech quality method of ITU-T P. 862. 1 MOS-LQO for the various call scenario from mobile VoIP service user to PSTN and mobile network users under various packet loss rates in the transmission channel environments. Our simulation results show that transformation of speech codecs results in the degraded speech quality for different transmission channel environments when mobile VoIP service users call up PSTN and mobile network users.

• 산업경영시스템학회지
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• 제34권1호
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• pp.80-89
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• 2011

In service science, it is critical to measure service satisfaction for innovating service processes, which is challenging for service sectors oriented to the usage of IT systems. For that purpose, in this study, a model based on the technology acceptance model and satisfaction measurement model is proposed. The model is empirically tested using data sets from a public service sector (G2B) and a private service sector (internet banking). The purpose of this study is to identify factors which affect the service satisfaction. The result shows that a public service sector is less sensitive to the IT systems on which its services are operated, and that the attitude factor strongly affects the service satisfaction in both sectors.