• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2005년도 추계학술대회 및 정기총회
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• pp.268-296
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• 2005

Given the growing expectations on the value and application of mobile office, we need to understand the factors which affect its successful use and implementation. We in this paper present a parsimonious model which integrates the IS success model and the TAM. The main feature of the model is that it allows one to explore the role of mobility of mobile office systems in determining the level of system usage and dependence. Although mobility is the key property of any mobile system, there is little research effort exerted to understand how mobility affects the traditional IS factors such as perceived ease of use and usefulness. In addition to the system usage, this model also uses dependence as the dependent variable. This is expected to provide richer understanding of the study context. We collected survey data from 1,614 field service workers of a major domestic electronic company. They use PDAs to retrieve information regarding the specifics of the customer service requests and to report what has been done for each service job. The results from SEM analysis show that mobility improves the perceived ease of use which then leads the field service workers to depend more on the PDA systems. Interestingly enough, however, the workers’ satisfaction does not cause more frequent use of the system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권12호
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• pp.4364-4384
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• 2021

The dynamic network state and the mobility of the terminals make the service function chain (SFC) orchestration mechanisms based on static and deterministic assumptions hard to be applied in SDN/NFV mobile edge computing networks. Designing dynamic and online SFC orchestration mechanism can greatly improve the execution efficiency of compute-intensive and resource-hungry applications in mobile edge computing networks. In order to increase the overall profit of service provider and reduce the resource cost, the system running time is divided into a sequence of time slots and a dynamic orchestration scheme based on an improved column generation algorithm is proposed in each slot. Firstly, the SFC dynamic orchestration problem is formulated as an integer linear programming (ILP) model based on layered graph. Then, in order to reduce the computation costs, a column generation model is used to simplify the ILP model. Finally, a two-stage heuristic algorithm based on greedy strategy is proposed. Four metrics are defined and the performance of the proposed algorithm is evaluated based on simulation. The results show that our proposal significantly provides more than 30% reduction of run time and about 12% improvement in service deployment success ratio compared to the Viterbi algorithm based mechanism.

• 디지털산업정보학회논문지
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• 제6권3호
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• pp.159-168
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• 2010

Developments and changes in digital environment based on computer technologies and internet networks enabled us interactive communication for planning and execution through the freedom of 'connection', 'sharing', and 'conversion'. The subject of this study, interactive commercial, might be the core of success based on creation which stems from communication design, revolution in design and technology, and conversion. Communication in modern economy is not optional, but essential. Furthermore, like evolution process up to Augmented Reality from developments of mobile communication technology, or concept in paradigm change, digital interactive commercial means the core of success, not a part of it. Therefore, in order to achieve success in the global competition structure, mobile communication design, revolution, and creation which produce added value shall be working as a base. In order to reach effective communication process performance of interactive commercial media, this study would like to propose building a media commercial system which is realized by human senses. Using this, standardized methods for interactive commercial which can be used together with augmented reality based on digital technology, and for using digital robot contents are available, along with methodology system of their use. In addition, the ultimate goal of this study aims to discover new factors through reorganization of precedent analysis and adaptation based on academic achievement and practical application. And thus, it wants to contribute to practical use of interactive commercial out of augmented reality-based communication in which technology, marketing, and design are integrated to be used in real sense.

• 정보처리학회논문지C
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• 제15C권1호
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• pp.51-60
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• 2008

모바일 노드의 움직임으로 인한 컨트롤 메시지의 오버헤드를 감소시키기 위해 마이크로 모빌리티 프로토콜이 만들어졌다. 모바일 장비의 보급으로 모바일 노드를 이용한 서비스는 계속 증가하고 있으며 인터넷에서 멀티미디어 서비스를 하기 위하여 멀티캐스트 서비스가 많이 사용된다. 이 논문에서는 마이크로 모빌리티 환경에 적절한 새로운 멀티캐스트 프로토콜을 제안하였다. 이 프로토콜은 모바일 노드가 움직여 잦은 핸드오프가 발생하는 경우에도 최적의 라우팅 경로를 유지하면서도 지속적인 멀티캐스트 서비스를 할 수 있도록 설계하였다. 이 프로토콜의 성능을 측정하기 위하여 시뮬레이션을 이용하여, 기존의 모바일 IP 멀티캐스트 방법인, Remote subscription, Bi-directional tunneling, 그리고 MMA와 비교 실험하였고, 전송 성공율, 네트워크에 미치는 부하 등 여러 가지 면에서 가장 좋은 결과를 얻었다.

• International Journal of Advanced Culture Technology
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• 제12권1호
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• pp.169-174
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• 2024

The Internet industry is developing at a high speed and entering the stage of convergence of everything, in which mobile devices are a key part, and smartphone manufacturing enterprises are developing rapidly in this environment. As one of the smartphone manufacturing enterprises that have dominated the Chinese smartphone market for many years, OPPO enterprise has developed rapidly and occupied a large share of the smartphone market. As a globally renowned technology company, its unique organizational culture is behind its success. In this study, through the analysis of OPPO's information and related literature, we found that OPPO's organizational culture has the characteristics of emphasizing teamwork, focusing on innovation, and advocating customer first. This organizational culture not only enhances employees' sense of belonging, but also promotes the company's long-term development. This study is not only important for understanding OPPO's success, but also for other companies to construct and optimize their organizational culture.

• 한국정보통신학회논문지
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• 제18권6호
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• pp.1350-1354
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• 2014

미국 등 해외 여러 국가에서 많은 통신사가 B2C 시장에서의 유무선 통합 서비스를 추진하였으나, 소비자의 외면 등으로 그 활성화가 이루어지지 못하였다. 반면에 최근에 는 공공기관과 대기업 중심으로 B2B 시장에서의 유무선 통합서비스가 독일 미국 등을 중심으로 활성화 되고 있으며, 이는 전자정부의 발달과 최근 BOYD (Bring You Own Device)의 추세에 적합하다. 본 논문에서는 해외 유무선 통신서비스의 사례를 분석하고 시사점을 분석한다. 또한 이를 근간으로 국내 전자정부의 취약점인 무선 서비스에 활성화 방안과 그 보안에 관하여 기술한다.

• Asia pacific journal of information systems
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• 제33권4호
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• pp.899-933
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• 2023

The second-generation mobile instant messaging (SMIM) proliferates with various relationship management functions: group chats, audio/video chats, file sharing, real-time location sharing, and nonverbal graphics, such as emojis and stickers. This study integrates the important but often overlooked affordances theory into innovation diffusion and proposes an SMIM continuance intention model. SMIM is a social affordance platform for users to develop new friendships and maintain their relationships. Integrated diffusion of innovation and affordance theoretical frameworks, this study investigates the influence of four factors on the success of using SMIM apps to improve friendship development and relationship management. Data were collected from 231 participants using a survey questionnaire in a public university in Taiwan. The findings confirm the effects of friendship development and relationship maintenance on the intention of users to continue using SMIM apps. Implications for research and practice are discussed.

• 한국정보시스템학회지:정보시스템연구
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• 제23권1호
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• pp.225-246
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• 2014

With the recent establishment of a ubiquitous environment and the paradigm shift to a smart society, the use of mobile devices, such as smart phones and tablet PCs, has become widespread. Thus, the trend is gradually shifting from using Web-based Instant Messenger to using Mobile-based Instant Messenger. Mobile Instant Messenger refers to a service that allows instant messaging as well as data sending and receiving between individuals with exclusive application programs(mobile Apps), which can be used in portable devices-such as smart phones-with wireless Internet access. Korea's portal sites, telecommunication companies, and even big companies have all rushed into the MIM market to join the competition. The reason so many companies are showing interest in the MIM business is because it is rising as a core platform to substitute portal sites in the mobile society, and MIM is perceived as the best means to attract and secure users. The intention to reuse or use continually was considered an important factor in maintaining a dominant position amidst such fierce competition, and consequently, most research thus far has reflected such thought. However, the frequent or long-term use of a system alone cannot indicate the definite success of the system, nor guarantee its dominant position in the market. On the contrary, MIM dependence, which goes beyond simple repetitive use and indicates a state where users actually or emotionally depend on a specific system, can better explain the user action. However, not much research has been conducted on dependence. The research results showed that lively message, concise message, message responsiveness, and social belonging significantly affected perceived usefulness. Message responsiveness, Link, and social belonging significantly affected flow. Flow significantly affected MIM dependence, and perceived usefulness did not affect MIM dependence. This study has proven that lively message, concise message, message responsiveness, Link, social belonging and perceived usefulness are important antecedents and mediating factors of MIM dependence. Moreover, this study is significant in that it explains the overall process of MIM dependence, and expands on the variety and scope of research that can be applied to MIM-related studies.

• International Journal of Advanced Culture Technology
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• 제4권2호
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• pp.7-18
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• 2016

The first D2C-era web-real variety show in Korea was broadcast via tvN of CJ E&M. The web-real variety program 'SinSeoYuGi' accumulated 54 million views, along with 50 million views at the Chinese portal site QQ. This study carries out an analysis using text mining that extracts portal site blogs, twitter page views and associative terms. In addition, this study derives viewers' response by extracting key words with opinion mining techniques that divide positive words, neutral words and negative words through customer sentiment analysis. It is found that the success factors of the web-real variety were reduced in appearance fees and production cost, harmony between actual cast members and scenario characters, mobile TV programing, and pre-roll advertising. It is expected that web-real variety broadcasting will increase in value as web contents in the future, and be established as a new genre with the job of 'technical marketer' growing as well.

• ETRI Journal
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• 제44권4호
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• pp.560-572
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• 2022

H²RDC (heuristic handover based on RCC-DTSK-C), a heuristic algorithm based on a highly interpretable deep Takagi-Sugeno-Kang fuzzy classifier, is proposed for suppressing the mobile heterogeneous networks problem of frequent handover and handover ping-pong in the multibase-station scenario. This classifier uses a stack structure between subsystems to form a deep classifier before generating a base station (BS) priority sequence during the handover process, and adaptive handover hysteresis is calculated. Simulation results show that H²RDC allows user equipment to switch to the best antenna at the optimal time. In high-BS density load and mobility scenarios, the proposed algorithm's handover success rate is similar to those of classic algorithms such as best connection (BC), self tuning handover algorithm (STHA), and heuristic for handover based on AHP-TOPSIS-FUZZY (H²ATF). Moreover, the handover rate is 83% lower under H²RDC than under BC, whereas the handover ping-pong rate is 76% lower.