• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.4
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• pp.81-87
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• 2016

With the rapid growth of the up-to-date smartphone and wireless network technologies, huge and various types of smart applications using these technologies are actively developed recently. Especially, multiplex types of smart applications using smartphone are developed and diffused with the rapid development of the ubiquitous sensor network technology using various sensors and the mobile computing technology that enables us to get network services at any time in any places. In this paper, we design a smart application that can accurately diagnose and process the current state of the local environment, objects, and persons remotely based on the context information such as local ecology, circumstances, medical or healthcare records and realtime sound or motion pictures using up-to-date samrtphone technology on the USN based mobile computing environment.

• Journal of The Korean Association of Information Education
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• v.18 no.4
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• pp.521-528
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• 2014

To discover an up-to-date way of learning through smart devices, our research studied the impact of Web 2.0 learning environment using smart devices on learner's academic achievement and learning attitude. We performed an experiment during 7 weeks based on elementary school 5th grade Society curriculum and the results were analyzed. Followings are the summary of results: The experimental group obtained higher academic achievement and also showed more improvements in self-directed learning attitude than the control group. Therefore, the usage of smart devices in Web 2.0 environment has positive effects on the academic achievement of students and their self-directed learning attitude within collaborate learning courses.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.2
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• pp.307-318
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• 2013

Smart grid is composed of variable domains including different systems, and different types of the access control are needed in the multiple domain. Therefore, the access control model suitable for the smart grid environment is required to minimize access control error and deny the unauthorized access. This paper introduce the access control requirements in the smart grid environment and propose the access control model, SG-RBAC, satisfied with the requirements. SG-RBAC model imposes constraints on the access right activation according to the user property, the role property, and the system property. It also imposes constraints on the delegation and the inheritance of access right according to temporal/spatial information and a crisis occurrence.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.9
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• pp.2180-2188
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• 2015

Plagiarism in which people use other people's works partially or in entirety as if they are their own and infringement on copyrights that frequently occur in various forms under smart device environment are becoming one of the crucial problems that need to be solved for Korea to become an advanced nation. This paper investigates and analyzes how college students, the heaviest user of smart devices under various smart device environment, are committing plagiarism and copyright infringement and suggest a basic education plan to prevent plagiarism and copyright infringement. College students have a very low awareness of plagiarism and copyrights and the level of violation associated with plagiarism and copyrights infringement they commit from elementary school to college were found to be at a serious level. It was demonstrated that the solution suggested in this paper to solve these problems would be effective in enhancing the awareness of the bad effect of plagiarism and copyrights infringement along with their side effects.

• Journal of the Korea Convergence Society
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• v.12 no.1
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• pp.77-87
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• 2021

Environment is an important factor in city life. Environmental elements are a subject that must be discussed in the smart city plan, but there is still a lack of information and data sharing in the urban environment, so improvements are needed. As part of the intelligent of Nanjing, this research has made in-depth investigation into the construction and service demand of environmental information, and has carried out the research on the design and construction of intelligent information platform that conforms to Nanjing intelligent city planning, improves environmental quality and provides environmental information service. The visualization of information is also studied. The result is an important module in the construction of intelligent city in Nanjing.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.5
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• pp.109-127
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• 2011

Mobile Office is a new type of working method in the workplace that can be used at any time or anywhere by connecting to the network with mobile devices. This allows people to do their jobs without their physical presence in their offices to use computers. The elements in mobile office environment are advancing. They include the widespread distribution of the smart phones, the network enhancing strategy in a ubiquitous environment and expansion of the wireless internet; however, there are not enough security guidelines or policies against these threats on the new environment, the mobile office, although there is the revitalization policy of smart work supported by the government. CERT and ISAC, the known security system as of now, could be used for the secure mobile office, In this paper, suggestions are to be provided for strengthening the security of smart mobile office by analysing the functions of CERT and ISAC.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.3
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• pp.469-478
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• 2022

This paper contains the results of developing smart devices and applications to monitor the load power of the industrial manufacturing machine and evaluate its performance. The smart devices in this paper are divided into two functionalities, which are collecting load power along with operating environment data of industrial manufacturing machines and transmitting the data to servers. Load power data collected from the smart devices are uploaded to MariaDB inside the Amazon Web Service (AWS) server. Using the RESTFul API, the uploaded power data can be retrieved and shown on the web and mobile application in the form of a graph to provide monitoring capability. To evaluate the performance of the developed system, the response time from MariaDB to web and mobile applications was measured. The results is ranging from 0.0256 to 0.0545 seconds in a 4G (LTE) network environment and from 0.6126 to 1.2978 seconds in a 3G network environment, which is considered a satisfactory result.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.183-183
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• 2023

Smart water cities (SWC) are urban municipalities that utilizes modern innovations in managing and preserving the urban water cycle in the city; with the purpose of securing sustainability and improving the quality of life of the urban population. Understanding the different urban water characteristics and management strategies of cities situate a baseline in the development of evaluation scheme in determining whether the city is smart and sustainable. This research herein aims to develop measurements and evaluation for SWC Key Performance Indicators (KPIs), and set up a unified global standard and certification scheme. The assessment for SWC is performed in technical, as well as governance and prospective aspects. KPI measurements under Technical Pillar assess the cities' use of technologies in providing sufficient water supply, monitoring water quality, strengthening disaster resilience, minimizing hazard vulnerability, and maintaining and protecting the urban water ecosystem. Governance and Prospective Pillar on the other hand, evaluates the social, economic and administrative systems set in place to manage the water resources, delivering water services to different levels of society. The performance assessment is composed of a variety of procedures performed in a quantitative and qualitative manner, such as computations through established equations, interviews with authorities in charge, field survey inspections, etc. The developed SWC KPI measurements are used to evaluate the urban water management practices for Busan Eco Delta city, a Semulmeori waterfront area in Gangseo district, Busan. The evaluation and scoring process was presented and established, serving as the basis for the application of the smart water city certification all over the world. The established guideline will be used to analyze future cities, providing integrated and comprehensive information on the status of their urban water cycle, gathering new techniques and proposing solutions for smarter measures.

• Journal of information and communication convergence engineering
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• v.16 no.1
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• pp.60-65
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• 2018

The Internet of Things (IoT) is happening now. By implementing IoT, we can build smart home system. Smart home is an application that is a combination of technology and services that specialize in the home environment with specific functions aimed at improving the efficiency, comfort and security of the occupants. Smart homes filled with connected products are loaded with possibilities to make our lives easier, more convenient, and more comfortable. This intelligent home system uses a microcontroller to process functions that provided by smart home system, such functions as RFID for door access and PIR sensors for motion detection. By using Android users could control the sensors anytime and anywhere. Microcontroller used is Arduino IDE with WeMos D1R2 board. Based on the testing process, there was a successful communication between the components of the device, sensors, and Android devices. Users could open or close the solenoid, users can also turn off or turn on electronic devices using Android.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.4
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• pp.193-198
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• 2010

Smart phone systems such as Android and iPhone are spreading into the next generation's computing and the prediction that cell phone (especially smart phone) penetration rate will be higher than that of PC in the near future is predominant. In this paper, we designed and materialized an item pool system which has self directed learning function that enables learning with smart phone (the PC in the hand). Users can choose the way of studying and do the offered estimation depending on their levels with smart phone. It is materialized the studying environment which can be done immediately anytime and anywhere.