• 한국정보시스템학회지:정보시스템연구
• /
• 제30권4호
• /
• pp.71-94
• /
• 2021

Purpose The purpose of this study is to verify impacts of factors, representing Push-Pull-Mooring(PPM) on switch intention to OTT(Over-The-Top) service in demand for content and to find relationship between factors through empirical analysis. Design/methodology/approach This study designed a research model by deriving factors affecting the intention to switch on OTT service based on the Push-Pull-Mooring framework and researches on OTT service. To test the hypothesis, a total of 357 responses were collected from individuals with experience in using OTT service and analyzed using SPSS26 and SmartPLS3.0. Findings According to the empirical analysis result, this study confirmed that the push, pull, and mooring factors proposed in this study had a significant effect on switching intention on OTT service. In addition, this study confirmed that both low switching cost and need for variety had a significant effect except for hypothesis H8.

• 한국콘텐츠학회논문지
• /
• 제22권1호
• /
• pp.224-239
• /
• 2022

온라인 판매가 무서운 성장세를 보여주고 있음에도 불구하고, 소비자 채널 전환행동 영역에서 오프라인 밴드왜건이 여전히 많은 주목을 받고 있다. 소비자의 오프라인에서 온라인 소매업자로의 전환행동을 탐색하는 기존연구와 달리, 본 연구는 push-pull-mooring 모델을 기반으로 소비자가 온라인에서 오프라인 채널로 전환하는 이유와 시점에 중점을 두어 살펴본다. 따라서, 본 연구는 구조방정식 모델과 SPSS를 이용하여 설립된 연구가설을 검증하였다. 그 결과는 예상대로 push 요인(지각된 위험과 불만족)과 pull 요인(대안매력과 지각된 주인의식)이 모두 소비자의 온라인에서 오프라인 채널로의 전환의도에 긍정적 영향을 미치는 것으로 나타났다. 또한, push 요인과 전환비용간의 상호작용 및 pull 요인과 주관적 규범간의 상호작용을 제외하고, 모든 push 요인과 mooring 요인(전환비용, 다양성 추구 성향과 주관적 규범)간의 상호작용 및 pull 요인과 mooring 요인간의 상호작용이 검증되었다. 마지막으로 시사점과 한계점을 더불어 제시하였다.

• 전력전자학회논문지
• /
• 제18권3호
• /
• pp.247-255
• /
• 2013

In this paper, a soft switching DC-DC converter for AC module type photovoltaic (PV) module integrated converter is proposed. A push-pull converter is suitable for a low voltage PV AC module system because the step-up ratio of a high frequency transformer is high and the number of primary side switches is relatively small. However, the conventional push-pull converters do not have high efficiency because of high switching losses by hard switching and transformer losses (copper and iron losses) by high turns-ratio of the transformer. In the proposed converter, primary side switches are turned on at zero voltage switching (ZCS) condition and turned off at zero current switching (ZVS) condition through parallel resonance between secondary leakage inductance of the transformer and a resonant capacitor. Therefore the proposed push-pull converter decreases the switching loss using soft switching of the primary switches. Also, the turns-ratio of the transformer can be reduced by half using a voltage-doubler of secondary side. The theoretical analysis of the proposed converter is verified by simulation and experimental results.

• 한국정보시스템학회지:정보시스템연구
• /
• 제27권2호
• /
• pp.221-245
• /
• 2018

Purpose This study aims to investigate the factors that influence switching intention of Smart Appliances. We focuses on Push-Pull-Mooring theory and status quo bias as factors related to switching behavior. Design/methodology/approach This study developed an model to explain the switching intention of Smart Appliances and conducted structural equation modeling with AMOS22.0. To test the proposed hypotheses, we collected 319 survey responses from smart appliances's users. Findings The results indicated that low usefulness and low ease of use had an effect on the switching intention of smart appliances. The results also indicated that attractiveness of the alternative and social norms had an effect on the switching intention of smart appliances. Lastly, The difference between the relation of push effect and switching intention and the relation of pull effect and switching intention was found to be due to the level of status quo bias. The academic and managerial implications were discussed based on the results of empirical analysis.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2009년도 제40회 하계학술대회
• /
• pp.989_990
• /
• 2009

최근 신재생에너지원의 사용 및 전기자동차의 이용이 확대되고 있는 실정에서 고승압의 전력변환기의 관심이 높아지고 있다. 이에 본 논문에서는 입출력 절연을 통하여 안전성 향상 및 고승압이 가능하며, 효율이 우수한 Push-Pull 절연형 DC/DC 컨버터를 제안한다. 제안된 컨버터는 출력단에 콘덴서를 이용한 배압 회로를 사용하여 고승압을 실현 하였으며, Soft Switching 방식을 적용하여 고효율화가 가능함을 검증 하였다.

• 디지털융복합연구
• /
• 제16권2호
• /
• pp.127-137
• /
• 2018

4차 산업혁명을 주도할 차세대 정보기술들이 발전하면서 다양한 산업 분야에서 이를 융합한 제품이 출시되고 있으며 스마트 가전은 차세대 기술과 플랫폼이 가전제품에 적용된 것으로 소비자들의 욕구를 충족시켜줄 미래의 핵심유망 산업으로 주목받고 있다. 이에 본 연구는 Push-Pull-Mooring 프레임워크를 기반으로 소비자들이 스마트 가전으로 전환하려는 행동의도에 어떤 요인들이 영향을 미치는지를 실증분석을 통해 살펴보고자 한다. 본 연구의 목적을 위해 217명의 자료를 수집하여 AMOS 22.0를 이용해 분석하였다. 연구결과, 기능적 결핍, 비용적 결핍, 대안매력도는 전환의도에 정(+)의 영향을 미치는 것으로 나타났으며 낮은 전환비용은 기능적 결핍, 비용적 결핍, 대안매력도와 전환의도 간의 관계 강화하는 것으로 나타났다. 본 연구의 결과는 스마트 가전에 주목하고 있는 기업에 소비자들을 유인하기 위해 고려해야 하는 요소들을 이해할 수 있는 유용한 정보 제공할 수 있을 것으로 기대한다.

• Journal of Power Electronics
• /
• 제12권3호
• /
• pp.418-428
• /
• 2012

It is very important to improve the overall efficiency of systems with a source of power that has low-voltage high-current terminal characteristics such as fuel cells. A resonant converter is required for high efficiency systems. However, the peak value of the switches current is large in a resonant converter. This peak current requires a large number of switches and results in system failures. In this paper, an analysis and experiments of a resonant isolation push-pull converter are performed. A switching loss analysis is performed in order to compare losses between a resonant push pull converter and a hard switching push-pull converter. Specially, the conduction loss is studied based on the ratio between the resonant frequency and the switching frequency. In addition, a method for improving the efficiency is implemented with conventional HF insolation converters.

• 한국정보시스템학회지:정보시스템연구
• /
• 제30권3호
• /
• pp.65-91
• /
• 2021

Purpose In this study, we investigated the impact of perceived risk and switching costs on switching intention to cloud service based on PPM (Pull-Push-Mooring) model. Design/methodology/approach We focused on revealing the switching factors of the switching intention to the cloud services. The switching factors to the cloud services were defined as perceived risk consisting of performance risk, economic risk, and security risk, and switching costs consisting of financial and learning costs. On the PPM model, we defined the pull factors consisting of perceived usefulness and perceived ease of use, and the push factor as satisfaction of the legacy system, and the mooring factor as policy supports. Findings The results of this study as follows; (1) Among the perceived risk factors, performance risk has a negative effect on the ease of use of pull factors, and finally it was found to affect the switching intention to the cloud services. Therefore, cloud service providers need to improve trust in cloud services, service timeliness, and linkage to the legacy systems. And it was found that economic risk and security risk among the perceived risk factors did not affect the switching intention to the cloud services. (2) Of the perceived risk factors, financial cost and learning cost did not affect the satisfaction of the legacy system, which is a push factor. It indicates that the respondents are positively considering switching to cloud service in the future, despite the fact that the respondents are satisfied with the use of the legacy system and are aware of the switching cost to cloud service. (3) Policy support was found to improve the switching intention to cloud services by alleviating the financial and learning costs required for cloud service switching.

• Journal of Power Electronics
• /
• 제12권2호
• /
• pp.242-248
• /
• 2012

Self oscillating current fed push pull resonant inverters can be controlled without using special drivers. Dc current flows through the choke coil and the power switches, although the driving signals of the power switches are sinusoidal. When the base current is near zero, the transistors cannot be operated in switching mode. Hence higher switching power losses and instantaneous peak power during off transitions are observed. In this study, an alternative design has been proposed to overcome this problem. A prototype circuit has been built which provides dc bias current to the base of the transistors. Experimental results are compared with theoretical calculations to demonstrate the validity of the design. The proposed design decreases the peak and average power losses by about 8 times, when compared to conventional designs.

• Journal of Information Display
• /
• 제9권2호
• /
• pp.9-13
• /
• 2008

A novel push-pull voltage converter structure, using a switched capacitor type voltage doubler, is proposed. The circuit is constructed with a two-stage push-pull voltage doubler that has a stable operation with small output ripple. The two-stage voltage doubler creates the output voltage 4Vdd. The high clock signal is cross-coupled to the input of the second stage with the opposite phase to reduce two switching transistors and capacitors. Simulation results verify that even with a reduced number of transistor and capacitor, there is no circuit performance loss. Adding one capacitor and two switching transistors the circuit can be changed to eight times of Vdd maker.