• 한국경영과학회지
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• 제41권1호
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• pp.71-85
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• 2016

Service channel environments have changed dramatically with the advent of new, online digital channels. This article studies the effects of perceived multi-channel service quality on customer satisfaction and loyalty in the banking industry and the moderating role of age, which is a characteristic of customers. The objective is to identify the quality factors that affect the overall satisfaction and loyalty of a multi-channel customer. A quantitative study was conducted on 900 customers, with the main targets being users of the nine primary Korean retail banks. Results show that perceived service quality of the physical environment, human service, Internet banking, mobile banking, and ATM has a positive influence on overall satisfaction and loyalty. Age moderates the relationship among physical environment quality, human service, and customer loyalty.

• 한국언론정보학보
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• 제58권
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• pp.154-177
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• 2012

본 연구는 채널수의 급격한 증가로 인해 이용 가능성이 증대하고 있는 TV 선호채널 설정기능 이용에 대한 태도 및 의도에 영향을 미치는 변인들을 찾고자 하였다. 이론적인 분석틀로 개혁확산이론, 채널레퍼토리, 채널전환행위, 사회적영향 등을 활용하여 연구가설 및 연구문제를 설정하였다. 일반 시청자 250명을 대상으로 온라인 설문조사를 실시한 뒤 다중회귀분석을 통해 실증적인 분석을 실시하였다. 분석결과, TV 선호채널 설정기능에 대한 태도에는 내재적 개혁성, 상대적장점, 사회적 임계점 등이 유의미한 영향을 미쳤으며, TV 선호채널 설정기능에 대한 이용의도에는 합치성, 관찰가능성, 사회적 임계점 등이 유의미한 영향을 미쳤다.

• 대한전기학회논문지:시스템및제어부문D
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• 제52권2호
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• pp.107-111
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• 2003

In the power-line communication systems, there are many factors of noise and attenuation in the power-line channels, because they were designed for not the communication but the power transmission. Also the transfer function of the channels is highly changed with the topology and the load of the power-lines. To cope with these poor channel situation, channel modeling, one of the many studies in progress, is being studied hard. Channel modeling is essential to apply the active schemes to overcome the bad channel(e.g. modulation technique, channel coding, signal coupling & filtering, etc.) to the power-line communications. In this paper, we have realized the statistical model(this model is suggested as the channel modeling method for the power-line channels) that is combined the transfer function with the various noises. And we have compared and examined the results with the measured data. Also we have studied the plan which can effectively establish the channel data base for the channel information consisted of the parameters that are derived from this modeling, and we have studied the plan to utilize the data base.

• 한국엔터테인먼트산업학회논문지
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• 제15권8호
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• pp.107-116
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• 2021

최근 수년간 시청자들의 프로그램 관람 후 만족도에 대한 연구는 다양한 분야에서 진행돼 왔다. 하지만 새롭게 구축된 CCTV-9 채널의 시청자 만족도 요인을 단순 분석하는 연구의 전례가 없었다. 그러므로 CCTV-9에서 어떻게 하면 빅데이터 시대에 대중적 욕구를 출발점으로 삼아 산업발전을 모색할 수 있을 것인가 하는 전략은 매우 중요한 일환(一環)이라고 할 수 있다. 본문은 CCTV-9의 시청자만족도와 관련된 영향 요인을 탐색적으로 연구하고 설문조사 방식으로 연령, 학력, 전공, 소득을 달리하는 101명의 남녀를 설문조사 하여 이 채널의 만족도 표본을 검증하여 채널만족도와 관련된 영향 인자로 아홉 가지 가설을 시험적으로 제시하였다. 실증분석을 통해 기록채널의 시청자 만족도에 영향을 미치는 결정요인을 연구하고 측정의 신뢰성과 유효성을 적절히 분석했으며 모든 가설을 통계적으로 검증했다. 본 연구의 실증 결과는 재제내용, 프로그램 형식, 프로그램 섹션 편성, 방송시간, 채널의 광고 포지션, 시리즈 다큐멘터리, 다양화 홍보 플랫폼, 입체화 브랜드 이미지는 시청자 만족도와 큰 관련이 있다.

• Steel and Composite Structures
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• 제21권3호
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• pp.629-659
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• 2016

In cold-formed stainless steel lipped channel-sections, web openings are becoming increasingly popular. Such openings, however, result in the sections becoming more susceptible to web crippling, especially under concentrated loads applied near the web opening. This paper presents the results of a finite element parametric study into the effect of circular web openings on the web crippling strength of cold-formed stainless steel lipped channel-sections for the interior-one-flange (IOF) loading condition. This involves a bearing load applied to the top flange of a length of member, away from the end supports. The cases of web openings located centred beneath the bearing load (i.e. beneath the bearing plate delivering the load) and offset to the bearing plate, are considered. Three grades of stainless steel are considered: duplex EN1.4462, austenitic EN1.4404 and ferretic EN1.4003. In total, 2218 finite element models were analyzed. From the results of the parametric study, strength reduction factors for load bearing capacity are determined, where these reduction factors are applied to the bearing capacity calculated for a web without openings, to take account the influence of the web openings. The strength reduction factors are first compared to equations recently proposed for cold-formed carbon steel lipped channel-sections. It is shown that for the case of the duplex grade, the strength reduction factor equations for cold-formed carbon steel are conservative but only by 2%. However, for the cases of the austentic and ferritic grades, the cold-formed carbon steel equations are around 9% conservative. New strength reduction factor equations are proposed for all three stainless steel grades.

• 대한전자공학회논문지TC
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• 제41권8호
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• pp.1-7
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• 2004

주파수 비선택적 Rayleigh 페이딩 채널에서 준 최적 빔 형성과 페이딩 상관이 폐루프 송신 안테나 다이버시티(CTD) 시스템에 주는 영향을 분석하였다. 이동국에서 채널을 완벽하게 예측하는 것은 빠르게 변하는 채널의 페이딩으로 매우 어렵기 때문에 각각의 송신 안테나에 불완전한 가중치를 곱하게 된다. 이 불완전한 가중치는 준 최적의 빔을 형성하게 되고, CTD 시스템의 성능을 저하시킨다. 무선 채널의 페이딩 상관 역시 다이버시티 이득을 감소시키는 하나의 요소이다. CTD 시스템의 비트오율을 채널 예측 에러, 채널 상관계수, 궤환지연, 그리고 페이딩 지수의 함수로 해석적으로 유도하였다. 해석 결과 채널 예측에러가 채널상관보다 시스템성능에 더 많은 영향을 주는 것을 알 수 있었다.

• 인터넷정보학회논문지
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• 제20권1호
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• pp.113-124
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• 2019

Recently, Omni Channel Services has been considered the most innovative business strategy. Omni-Channel sees a variety of channels from all channels viewpoints, organically combining each channel to provide a seamless experience for consumers. In other words, Omni-Channel is not simply a systematic integration of channels, but a means of delivering consistent services to consumers in all processes through a strategy to an organic connection. The aim of this study is to provide a comprehensive insight into the decision factors affecting the adoption of Omni-channel. For this purpose, an empirical analysis is conducted on the course of acceptanceof the Omni-channel service based on the Unified Theory of Acceptance and Use of Technology (UTAUT) and Task-technology fit (TTF), an effective model frequently selected to describe the acceptance of service in the introduction phase of new information technology. As a result of the study, it was confirmed that the task characteristics and the technical characteristics had a positive effect on the task-technology fit, and the task-technology fit had a positive effect on the performance expectancy. In addition, task-technology fit, performance expectancy, and social influence have a positive effect on the intention to use the Omni-Channel. This study is intended to deliver an experimental meaning by proposing a strategical measure to understand the behaviorsand uses of consumers in the Omni-channel service environment and increase the customer satisfaction for the system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 D
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• pp.2559-2561
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• 2002

This paper presents a systematic method of probing channel characteristics and communication reliabilities of home PLC (power line communication) network applied to the Internet accessed control of home appliances. The effects of the three performance deterioating factors, i.e., additive noise, channel attenuation, and intersymbol interference, can be systematically measured by applying the channel probing waveform in the frequency range from 100kHz to 450kHz. The agreement between the derived probability of bit error and the measured probability of bit error supports the validity of the proposed approach of probing home power line channel characteristics. The experimental results performed with the constructed test-bed applying the proposed channel probing method also support the feasibility of commercially deploying the PLC modem installed home appliances and their services for the Internet accessed home automation.

• 대한전자공학회논문지TC
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• 제37권4호
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• pp.17-24
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• 2000

통신을 위한 채널로써 전력선을 활용하기 위해서, 전력선상에서 존재하는 잡음을 측정하여 잡음 데이터를 획득하고, 망구조에 따른 단위길이(100m당)에 따른 신호 감쇄량을 측정했다. 본 논문에서 구분한 3종류의 전력선 구조에 따른 신호 감쇄와 잡음의 최대, 최소값을 이용해서 채널 용량식에 대입한 후 통신 채널로써 전력선이 가지는 채널용량을 계산하였다. 건물내 전력선이 가지는 채널용량은 전력선에 있어서 송,수신기 사이의 거리와 전력선 망구조에 영향을 크게 받는 것으로 나타났다.

• 산업기술연구
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• 제27권B호
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• pp.21-27
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• 2007

The power line channel has time-variant characteristics caused by various kind of electrical devices. This characteristics are synchronized with the main voltage by their own characteristics. The main factors of disturbance are the variation of the channel impedance and noises. In other papers, the synchronous noise modeling has been achieved. But the modeling is not satisfied simultaneously with the time domain and the frequency domain and there are not any discussion about short-term variations of the channel impedance which cause to the signal fading. Therefore, this paper researched to solve problems about the signal fading by analyzing the short-term variation of the channel impedance, and proposed the synchronous noise modeling which is satisfied simultaneously in the time domain and the frequency domain.