• International Journal of Control, Automation, and Systems
• /
• v.3 no.spc2
• /
• pp.355-362
• /
• 2005

Deregulations and market practices in power industry have brought great challenges to the system planning area. In particular, they introduce a variety of uncertainties to system planning. New techniques are required to cope with such uncertainties. As a promising approach, probabilistic methods are attracting more and more attentions by system planners. In small signal stability analysis, generation control parameters play an important role in determining the stability margin. The objective of this paper is to investigate power system state matrix sensitivity characteristics with respect to system parameter uncertainties with analytical and numerical approaches and to identify those parameters have great impact on system eigenvalues, therefore, the system stability properties. Those identified parameter variations need to be investigated with priority. The results can be used to help Regional Transmission Organizations (RTOs) and Independent System Operators (ISOs) perform planning studies under the open access environment.

• International Journal of Internet, Broadcasting and Communication
• /
• v.12 no.2
• /
• pp.8-14
• /
• 2020

Recently, there was an increasing demand for an integrated access control system which is capable of user recognition, door control, and facility operations control for smart buildings automation. The market available door lock access control solutions need to be improved from the current level security of door locks operations where security is compromised when a password or digital keys are exposed to the strangers. At present, the access control system solution providers focusing on developing an automatic access control system using (RF) based technologies like bluetooth, WiFi, etc. All the existing automatic door access control technologies required an additional hardware interface and always vulnerable security threads. This paper proposes the user identification and authentication solution for automatic door lock control operations using camera based visible light communication (VLC) technology. This proposed approach use the cameras installed in building facility, user smart devices and IoT open source controller based LED light sensors installed in buildings infrastructure. The building facility installed IoT LED light sensors transmit the authorized user and facility information color grid code and the smart device camera decode the user informations and verify with stored user information then indicate the authentication status to the user and send authentication acknowledgement to facility door lock integrated camera to control the door lock operations. The camera based VLC receiver uses the artificial intelligence (AI) methods to decode VLC data to improve the VLC performance. This paper implements the testbed model using IoT open-source based LED light sensor with CCTV camera and user smartphone devices. The experiment results are verified with custom made convolutional neural network (CNN) based AI techniques for VLC deciding method on smart devices and PC based CCTV monitoring solutions. The archived experiment results confirm that proposed door access control solution is effective and robust for automatic door access control.

• International Journal of Internet, Broadcasting and Communication
• /
• v.13 no.3
• /
• pp.1-11
• /
• 2021

Development of ICT technologies leads exponential growth of various sharing economy over the last couple of years. The intuitive advantage of the sharing economy is efficient utilization of idle goods and services, but there are safety and security concerns. In this paper, we propose a onetime password based access control system to support secure accommodation sharing service and show the implementation results. To provide a secure service to both the provider and the user, the proposed system issues a onetime access password that is valid only during the sharing period reserved by the user, thereafter access returns to the accommodation owner. Especially, our system provides secure user access by merging the two elements of speaker recognition using voice and a one-time password to open and close the door lock. In this paper, we propose a secure system for accommodation sharing services as a use-case, but the proposed system can be applicable to various sharing services utilizing security-sensitive facilities.

• International Journal of Computer Science & Network Security
• /
• v.22 no.1
• /
• pp.183-188
• /
• 2022

This paper explores the opportunities for scholarly publishing as part of the educational activities of the system of extracurricular research and experimental education, UNESCO Category 2 Centre, "Junior Academy of Sciences of Ukraine" (hereinafter referred to as the JASU), using Open Journal Systems (hereinafter referred to as OJS) publishing platform. The purpose of the study was to identify and select a publishing model and substantiate the procedures for the launch of an OJS-based open-access student scholarly e-journal with a view of improving scholarly communication between gifted children from Ukraine and other countries.

• The Journal of the Korea Contents Association
• /
• v.13 no.12
• /
• pp.568-574
• /
• 2013

In recent years, IT companies offer various cloud services using hardware-based technologies or software-based technologies. User can access these cloud services without the constraints of location or devices. The technologies are virtualization, provisioning, and big data processing. However, security incidents are constantly occurring even with these techniques. Thus, many companies build and operate private cloud service to prevent the leak of critical data. If virtual environment are different according to user permission, many system are needed, and user should login several virtual system to execute an program. In this paper, I suggest the access control method for application software on virtual operating system using the Open Authentication protocol in the Cloud system.

• The Journal of the Korea Contents Association
• /
• v.16 no.9
• /
• pp.512-522
• /
• 2016

The purpose of this study was to investigate general population's awareness and attitudes toward medical records and an 'Open Notes' system which allows the general public to access their medical records anytime on the hospital website. This study also examines the possibility of making the 'Open Notes' system available to Korean medical community and the general public. The results of this study shows that the general population usually used internet for health information. They obtained their medical records from the hospital mostly for the purpose of submitting to insurance company. They also believed that medical records that hospital and doctors provided might be forged or falsified. The majority of them responded that they could trust their doctors and hospitals more if they could have access to their own medical records anytime. Most of the respondents agreed that the Open Notes system would be beneficial for the general public and that it should be implemented in Korea. And they would be willing to participate in the Open Notes system if it is introduced. In conclusion, if the Open Notes system which emphasizes transparency in medical records is introduced, it could enhance the trust between doctor and patient. The trust doctor-patient relation would make patients more likely to comply and be satisfied with doctors.

• Journal of the Korean Society for information Management
• /
• v.33 no.3
• /
• pp.31-61
• /
• 2016

This study aims to implement the electronic record management systems that can preserve and utilize local festival records and archives. To accomplish the goal, this study used open source software for Namwon chunhyang festival as a case. This paper revealed the fact that there is no constructive system for preserving local festival records. To solve this problem, this study implemented electonic records management system based on Open Source Softwares, which are called AtoM(Access to Memory) and OMEKA. Also, both OSSs were compared and evaluated according to Characteristics of Local festival records. As a result, ERMS for Festival based on AtoM was appropriate comparatively.

• 한국가스학회:학술대회논문집
• /
• 2003.10a
• /
• pp.219-224
• /
• 2003

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.22 no.2
• /
• pp.375-381
• /
• 2018

As smart home network services such as home CCTV, outdoor control of home appliances, home security and disaster prevention services become popular, there appear various affiliated products including smart home gateway and smart speaker. Since those services are generally developed on the vendors' individual hardware and software platforms, it is not much expected for them to interwork well among different architecture and communication methods. In this paper, we propose a new home network service system running on an open source platform to address such issues. We implemented a home network system using OpenWRT-based wireless router(or access point) and Zigbee communication technology. In the proposed system, a wireless router replaces a commercial home gateway and small control units implemented with Arduino control electronic devices and sensors in home. Several service scenarios are also implemented to verify the operability of the proposed system.

• The Journal of the Convergence on Culture Technology
• /
• v.8 no.5
• /
• pp.431-435
• /
• 2022

The fields of STEM (Science, Technology, Engineering and Medicine) are changing rapidly. Recently, with the remarkable development of Internet and Web technologies, an environment that can be accessed worldwide has been created, thereby lowering the barriers to share STEM knowledge and information. The purpose of this study is to derive improvements by evaluating users' satisfaction with the information system developed by applying the open access model in the STEM field. Through an online survey using a structured questionnaire, a total of 204 users participated from January to February. The collected data were analyzed using quantitative statistical techniques. IPA (Importance Performance Analysis) technique was used. By identifying the importance and satisfaction (performance) between variables, areas with relatively low satisfaction compared to importance were derived. Users' overall satisfaction with the open access information system was 81.2 points and social reliability was 85.9 points, which were relatively high, respectively. What should be paid attention to in this study is the satisfaction with the system use environment, which is the most vulnerable area.