• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.8 no.2
• /
• pp.583-600
• /
• 2014

Social media is considered a valuable platform for gathering and analyzing the collective and subconscious opinions of people in Internet and mobile environments, where they express, explicitly and implicitly, their daily preferences for brands and products. Extracting and tracking the various attitudes and concerns that people express through social media could enable us to categorize brands and decipher individuals' cognitive decision-making structure in their choice of brands. We investigate the cognitive network structure of consumers by building an inter-category map through the mining of big data. In so doing, we create an improved online recommendation model. Building on economic sociology theory, we suggest a framework for revealing collective preference by analyzing the patterns of brand names that users frequently mention in the online public sphere. We expect that our study will be useful for those conducting theoretical research on digital marketing strategies and doing practical work on branding strategies.

• Journal of Digital Convergence
• /
• v.10 no.2
• /
• pp.93-100
• /
• 2012

Changing the world, Smartphone has appeared in our lives. People feel convenient in their lives or work. The growth of Smartwork has developed for years all over the world. It has many functions, for instance it is not only help to save energy but also reduce environmental pollution at office or company. There are lots of reasons for this. Eventually Korea is well known as IT industry. So it is the best place to build. In order to achieve Smartwork, there must be service like infra, device, software and so on. Therefore in this study, we'll find business model(Blue ocean strategy) for Smartwork service, and apply into this.

• The Journal of Korean Association of Computer Education
• /
• v.6 no.3
• /
• pp.87-98
• /
• 2003

In recent years, e-Learning has taken an important position in the field of education. In turn, as the number of e-Learning contents continue to grow, many institutions are facing difficulty how to cut down the cost for content development and to reuse contents once made for the future courses. On of the way to solve this problem is to create technological standard for e-Learning contents and platform, for which e-Learning experts are actively participating around the world. The purpose of the study was to suggest technological standard for sharing e-Learning contents, especially among cyber universities which were established with the Life-long Education Act. To achieve the research objective, at first, we reviewed literatures related to the e-Learning standard, surveyed content management policies in cyber universities, and then made suggestions what to do for the standardization.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.15 no.1
• /
• pp.171-178
• /
• 2015

In these days, the practical training education is getting highlighted in IT curriculum. This study is for the Cloud computing based Virtual Desktop Service Plan of IT education and its efficient operation and management plan. With the implementation of a virtual lab environment system, the training environment which is customized by the curriculum is able to be provided. Also in the case of the limited system, the curriculum is able to be provided for each subject in advance. Therefore if the Cloud Training (or Practicing) Portal system for the multiple cyber universities is implemented according to this study's estimated scale and operation managing policies, the virtual training education service system could be provided in more efficient and more effective ways.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.11
• /
• pp.166-174
• /
• 2016

In this paper, we developed a mixed-integer linear programming model for transportation planning of athletes in sports events. The transportation planning of athletes involves finding the lowest-cost and fastest-time plan for distributing athletes from multiple accommodation to stadium. The decision variables associate with the number of driving events, and the total transportation cost is the objective function that needs to be minimized. The proposed method uses mixed integer linear programming to solve transportation problem, thus the global optimality is guaranteed. In order to verify the effectiveness of proposed method, we performed simulation and built the sports event management service platform (SEMSP) for transportation planning.

• Advances in Energy Research
• /
• v.5 no.4
• /
• pp.321-339
• /
• 2017

Energy simulation tools can provide information on the amount of heat transfer through building envelope components, which are considered the main sources of heat loss in buildings. Therefore, it is important to improve the quality of outputs from energy simulation tools and also the process of obtaining them. In this paper, a new Building Energy Performance Assessment Tool (BEPAT) is introduced, which provides users with granular data related to heat transfer through every single wall, window, door, roof, and floor in a building and automatically saves all the related data in text files. This information can be used to identify the envelope components for thermal improvement through energy retrofit or during the design phase. The generated data can also be adopted in the design of energy smart homes, building design tools, and energy retrofit tools as a supplementary dataset. BEPAT is developed by modifying EnergyPlus source code as the energy simulation engine using C++, which only requires Input Data File (IDF) and weather file to perform the energy simulation and automatically provide detailed output. To validate the BEPAT results, a computer model is developed in Revit for use in BEPAT. Validating BEPAT's output with EnergyPlus "advanced output" shows a difference of less than 2% and thus establishing the capability of this tool to facilitate the provision of detailed output on the quantity of heat transfer through walls, fenestrations, roofs, and floors.

• Journal of information and communication convergence engineering
• /
• v.12 no.4
• /
• pp.228-236
• /
• 2014

One of major purposes of these standard technologies is to ensure interoperability between entities from different vendors and enable interworking between various technologies. As interoperability and interworking are essential for machine-to-machine communications (M2M) and Internet of Things (IoT) for them to achieve their ultimate goal, i.e., things to be connected each other, multiple standards organizations are now working on development M2M/IoT related specifications. This paper reviews the current activities of some of the most relevant standardization bodies in the area of M2M and IoT: third-generation partnership project (3GPP) core and radio network aspects, broadband forum, and oneM2M. The major features and issues being focused upon in these standards bodies are summarized. Finally, some key common trends among the different bodies are identified: a common service layer platform, new technologies mitigating an explosive growth of network traffic, and considerations and efforts related to the development of device management technologies.

• Journal of Digital Convergence
• /
• v.16 no.8
• /
• pp.201-210
• /
• 2018

High expectations are posed on the blockchain-based internet of things (IoT), in which IoT and blockchain technology is combined to obtain trust in the Internet, where trust appears impossible to obtain. However, applications of current blockchain-based IoT technology to real-world scenarios appears to be significantly more difficult owing to limitations regarding scalability and security. In this paper, the difficulties to implement blockchain networking technologies for IoT and digital businesses are investigated and practical solutions such as sharding, off-chain, de-idetification and P2P crypto-currency exchange are explored. In further work, a blockchain platform for IoTs which provides scalability and security will be implemented according to this research results, and compared with conventional blockchain platforms.

• Journal of Information Management
• /
• v.33 no.1
• /
• pp.48-60
• /
• 2002

According to the rapid increasement of web usage, an appropriate model which supports systematically the web-based application-to-application interactions and the approach which can integrate the new distributed computing platform and the existing environments have been investigated. The web services has emerged as the solution to these needs. This paper describes the background of the emergence of the web services and the definition and characteristics of web services. Then, after explaining the operation mechanism of web services, the core techniques which are essential to implement the web services and the implementation cases are examined. Lastly, the future of web services has been mentioned.

• Journal of The Korean Digital Architecture Interior Association
• /
• v.13 no.3
• /
• pp.51-58
• /
• 2013

The projects are becoming more complicated and amplified as the design and development technology is advancing. Thus, existing architectural processes and methods are revealing limitations. The technology of BIM is an IT applied to construction, that provides the state-of-the-art tools to overcome these limitations to improve on architectural designing, technology, cost, etc. Therefore, it it necessary to converge the advises and collaboration from the various experts at the initial step in a common processing platform. In this research project with Korean Education Development Institute, configuration and utilization of EDU BIM template is studied because setting an anchor point from the initial phase is necessary for such processes at the perspective of the operator. The purpose of this study is to prevent time consumptions at the initial phase of BIM foundation, to ensure accurate information inputs within the repetitive tasks, and for effective information management that will produce consistent results through utilization of BIM technology.