• 한국IT서비스학회지
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• 제16권1호
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• pp.99-118
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• 2017

Growing importance of online security on certification, many of the web-related security technology introduced day by day. Especially, using smart certificate (USIM) is recognized as one of the most safe and convenient method for the security of public certificate. The purpose of this study is to find the factors that affect the Intention of switching to smart certificate for the general public who use public certificate service. Based on migration theory, this study determined the relationship between pull factors, push factors and mooring factors which can affect the intention of switching to smart certificate. To empirically analyze the proposed hypothesis, the statistical analysis were conducted based on the response from 350 public certificate service users using SPSS 22.0 and Smart PLS 2.0. The results of this study can be summarized as follows. First, system quality, one of the pull factors has positive influence on perceived ease of use. On the other hand, the other pull factor, service quality has positive influence on both perceived ease of use and perceived usefulness. Second, push factors, user experience and information security awareness have positive influence on perceived ease of use only. Third, mooring factor, switching cost does not have influence on switching intention while perceived usefulness has positive influence on. The results of this research can be used for whom has interest to the switching intention of public certificate service for online security and provide the proper understanding about smart certificate service mechanism.

• 한국정보시스템학회지:정보시스템연구
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• 제30권4호
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• pp.43-69
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• 2021

Purpose Although companies occupied the network market take the advantageous position first and can be successful in securing users over a certain size, it is important to satisfy the customers' demand and prevent the outflow of users toward a new alternative SNS. What is more, there are frequent changes in the flow of users toward new SNSs. Despite these dynamic market circumstances, there is a lack of research to explain the switching behaviors of SNS users. Design/methodology/approach The objective of this study is to explain and verify a specified migration theory(Push-Pull-Mooring model) focused on SNS fatigue in the psychological point of view, as well as reviewing previous studies on functional and technical characteristics of SNSs themselves. Moreover, this study tried to highlight factors affecting users actual SNS switch rather than their switching intention. Findings According to the statistical analysis, the most influenced pull factor to switch SNS was the alternative attractiveness. On the other hand, undesired relationship burden, service innovation and important mooring factors to prevent users' SNS switch. This study has a significant contribution to the theory, which analyzed users' actual SNS switch, and examined SNS users' psychological factors(SNS fatigue), reviewing the characteristics of existing services. To secure more users and to keep them, companies providing social network service need to develop differentiated strategies by analyzing psychological characteristics of various users.

• 경영과학
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• 제30권2호
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• pp.63-77
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• 2013

Recently, many companies are interested in adopting cloud computing as their IT strategy. However, no distinct results have appeared in the substantial implementation of this technology. The main reason for such result is from the absence of research models leading to high impact studies on cloud computing. Thus, this study attempts to find a possible answer for the following research question : what factors influence an organizational assimilation of cloud computing? This study investigates Technology-Push (TP)/Need-Pull (NP) theory as a main factor affecting cloud computing assimilation. Also, the study examines the moderating role of organizational readiness. TP includes of perceived benefits, vendor pressure, cost savings, and IT activity intensity while NP includes competitor orientation, information technology policy, technological turbulence, and performance gaps. In addition, organizational readiness suggests two variables, financial resources and technological knowledge. Result from 217 adopting organizations showed that all of these factors with exception of competitor orientation and vendor pressure, have statistically significant impact on assimilation of cloud computing. The implications of the findings propose a theoretical framework for the foundation of studies on cloud computing assimilation, which can server as important practical guidelines for technology development.

• 한국지구과학회지
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• 제37권1호
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• pp.62-77
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• 2016

초기의 판 구조론에서 지각 판은 연약권 위에 떠서 맨틀의 움직임에 따라 움직이는 수동적인 모습으로 그려졌고, 자연히 해령에서 발산되는 힘이나 암석권 하부의 맨틀 견인력(drag force)이 판을 움직이는 주된 원동력으로 묘사되었다. 하지만 최근 여러 연구들은 판의 이동을 일으키는 원동력이 맨틀의 대류보다는 섭입대에서 침강하는 판이 만드는 섭입판 인력(slab pull)이라고 보고 있다. 최근 학계는 무거운 해양판과 주변 연약권의 밀도 차이가 섭입판 인력의 핵심이라고 설명한다. 해양판의 높은 밀도는 중력에 의해 판이 해구에서 맨틀 속으로 가라앉는 원인이 되며, 이것이 판이 움직이는 가장 큰 원동력을 발생시키는 것이다. 이러한 연구 결과들을 바탕으로, 본 연구는 고등학교 지구과학 교과서의 관련 내용을 검토하고 최근 수십 년 간의 서술 경향을 분석하였다. 그 결과 5차 교육과정 이래로 지금까지 거의 대부분의 고등학교 교과서가 맨틀 대류를 판 이동의 주 원동력으로 서술하고 있다는 것을 확인하였으며, 이는 대학교 교재가 개정판을 통해 새로운 학설을 꾸준히 제시해온 것과 대조적인 모습이라 할 수 있다. 따라서 학생들에게 더욱 정확한 학술적 정보를 제공하기 위해 이와 같은 새로운 판 구조론 내용이 해당 교과서 관련 단원에 추가되어야 할 것이다.

• 지능정보연구
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• 제22권1호
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• pp.19-41
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• 2016

정보통신기술의 발전과 모바일 기기 사용의 생활화로 인해 최근 많은 소비자들이 멀티채널 쇼핑(multi-channel shopping)이라는 새로운 쇼핑 행태를 보이고 있다. 온라인 쇼핑이 등장한 이후, 온라인 매장에서 상품을 구매하기 전 오프라인 매장에서 상품을 먼저 확인하는 쇼루밍(showrooming) 형태의 멀티채널 쇼핑이 한 때 대세를 이루었으나, 최근에는 스마트폰, 태블릿 PC, 스마트워치 등 스마트 기기 사용의 폭발적 증가와 옴니채널(omni-channel) 전략으로 대표되는 오프라인 채널의 대대적 반격으로 인해 오프라인 매장에서 상품을 구매하기 전 온라인(혹은 모바일)으로 정보를 먼저 확인하는 웹루밍(webrooming) 현상이 도드라지게 나타나 온라인 소매업자를 위협하고 있다. 이러한 상황에서 소비자의 온라인 쇼핑에서 웹루밍으로의 쇼핑전환 의도에 영향을 미치는 요인을 분석하는 것이 의미가 있음에도 불구하고, 기존 대부분의 선행연구는 싱글채널(single-channel) 혹은 멀티채널 쇼핑 자체에만 초점을 맞추고 있다. 이에, 본 연구에서는 밀고-당기기-이주이론(push-pull-mooring theory)을 바탕으로 소비자의 온라인 채널 쇼핑이 웹루밍 형태의 쇼핑으로 전환되는 과정을 상품정보 탐색과 구매행위로 각각 구분하여 그 영향을 실증하였다. 연구모형을 검증하기 위하여, 웹루밍 경험이 있는 수도권 소재 대학생을 대상으로 280개의 설문 표본을 수집하였다. 본 연구의 결과는 현업 마케팅 종사자에게 멀티채널 소비자들을 관리하는 데 있어 실무적인 시사점을 제공함과 동시에, 향후 다양한 형태의 멀티채널 쇼핑전환 연구로의 확장에 기여할 수 있을 것으로 기대한다.

• 셀메드
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• 제8권4호
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• pp.25.1-25.2
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• 2018

The aim of this article is to suggest that Samulnori will be able to produce better and more lovable language. Samulnori is a good example of the Korean music. Samulnori is originally meaning four-percussion play. Janggu and buk made of leather which were mainly cowskin and dogskin. But jing and kkaengwari made out of brass. Four percussions are an instrument composed of a pattern based on the theory of yin and yang. The principle of Samulnori rhythms are well made up of the relaxation, tension, improvisation, escalating rhythms, and dynamic sound. Samulnori looks like two lovers exchanging sweet words in the natural forest. The push and pull between four instruments like a love quarrel. The author feels that the rhythms of the four instruments are like the whispers and cries of lovers. In conclusion, the silent or passionate rhythm of Samulnori feels like two lovers' tightrope love. The author thinks it creates a rich language of love.

• Journal of Power Electronics
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• 제9권1호
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• pp.61-67
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• 2009

In this paper, a simple technique is presented for robust stability testing of perturbed DC-DC converters having multi-linear uncertainty structure. This technique provides a necessary and sufficient condition for testing robust stability. It is based on the corollary of Routh criterion and gridding of parameters. The previous work based on parametric control theory using Kharitonov's theorem and Hermite Biehler theorem gives conservative results and only the sufficient condition of stability, whereas the proposed method provides the necessary and sufficient condition for testing robust stability and it is computationally efficient. The superiority of the method is compared with the Edge theorem.

• 산업경영시스템학회지
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• 제23권59호
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• pp.21-36
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• 2000

The drum-buffer-rope(DBR) system is a finite scheduling mechanism that balances the flow of the production system. DBR controls the flow of materials through the plant in order to produce products in accordance with market demand, with a minimum of manufacturing lead time, inventory, and operating expenses. This paper integrates the best of MRP push system and JIT pull system with DBR system, efficiently adapts these logics to capacity constraint resources, and contributes to the evolution of synchronous manufacturing. The purpose of this paper is, thus, threefold. The first objective is to identify the frame of theory of constraints(TOC) and the logic of DBR scheduling. The second objective is to formulate the DBR constraint scheduling problems(DBRCSP) in a job shop environments. Finally, the paper is to suggest the solution procedure of DBRCSP for embedding TOC into MRP/JIT along with an numerical expression. In addition, illustrative numerical example is given.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권6호
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• pp.1996-2011
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• 2021

To understand a trend is to explore the intricate process of how something or a particular situation is constantly changing or developing in a certain direction. This exploration is about observing and describing an unknown field of knowledge, not testing theories or models with a preconceived hypothesis. The purpose is to gain knowledge we did not expect and to recognize the associations among the elements that were suspected or not. This generally requires examining a massive amount of data to find information that could be transformed into meaningful knowledge. That is, looking through the lens of big-data analytics with an inductive reasoning approach will help expand our understanding of the complex nature of a trend. The current study explored the trend of well-being in South Korea using big-data analytic techniques to discover hidden search patterns, associative rules, and keyword signals. Thereafter, a theory was developed based on inductive reasoning - namely the hook, upward push, and downward pull to elucidate a holistic picture of how big-data implications alongside social phenomena may have influenced the well-being trend.

• 산경연구논집
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• 제10권1호
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• pp.59-67
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• 2019

Purpose - The Millennial Generation, which grew in the wake of the spread of the Internet and rapid changes in the media environment, is rapidly moving from the traditional broadcasting environment to the Internet-broadcasting environment in terms of content acceptance. With the emergence of UGC (User-generated content), the change in the status of single-person content creators enables the growth of multi-channel networks (MCN), a new content-distribution platform and an agency concept for single creators. Youtube-based MCN produces multiple single star producers and casts and provides its own video series through Youtube. It is also emerging as a major M&A target for global media providers in terms of providing content to a wide range of consumers with the same interests and consumption characteristics. In addition, for the Millennials generation, which are part of their lives, MCN is becoming the most suitable media for TGIF (Twitter, Google, i-phone, Facebook). Accordingly, this study defines newly emerging MCNs and analyzes the factors for accepting MCN-produced content based on the push-pull-mooring (PPM) model. Research design, data, and methodology - An empirical analysis is performed through a questionnaire survey. For this purpose, 204 people who have experience of watching MCN were studied. Collected data is processed through analysis of a structural equation model using R to test the hypothesis. Results - For the MCN service to become an alternative to existing media, it is necessary to continuously promote cultural diversity and diversity of attempts that conventional media cannot provide. It is the attractiveness of the alternative that has the greatest influence on the intention to switch to a MCN service. When we look at MCN content so far, certain patterns such as game progress, introduction, food, and chat rooms have already appeared. We need to overcome this and develop a completely new conceptual content that we have never seen before. This requires a more generous viewer perception of the topics covered. For diversity, linguistic and verbal violence should be tolerant in common sense to provide a foundation for securing cultural diversity. Conclusions - In this study, we tried to develop a comprehensive approach to the substitution effect of MCN. In terms of academic achievement, the PPM model is used to enhance the utilization of media and broadcasting. Practical implications are to provide an analytical framework for verifying alternative or complementary effects when viewers switch to MCN.