| Title | Reliability Assessment Methods and Optimal Bug-fix Release Problems Based on Deterministic Chaos Theory for an Open Source Software |
| Author | *Yoshinobu Tamura (Hiroshima Institute of Technology, Japan), Shigeru Yamada (Tottori University, Japan) |
| Page | pp. 789 - 792 |
| Keyword | Reliability, Open source software, optimal bug-fix release problem |
| Abstract | OSS(open source software) systems which serve as key components of critical infrastructures in our social life are still ever-expanding now. However, the poor handling of quality and customer support prohibit the progress of OSS. We focus on the problems in the software quality that prohibit the progress of OSS. In this paper, we propose the method of reliability assessment based on the deterministic chaos theory for OSS. Also, we analyze actual software fault-count data to show numerical examples of software reliability assessment for the OSS. |
| Title | Agent Based Simulation of Hot Strip Rolling Mills with Controllers |
| Author | *Keita Ohe, Koichi Nakano, Yoshihiro Abe, Masami Konishi (Okayama University, Japan) |
| Page | pp. 797 - 800 |
| Keyword | agent, hot strip mills, simulation, control system, diagnosis |
| Abstract | Currently, operators try to improve their operating
situation under the changing production circumstances.
It is an important problem in the future to maintain and to extend their technologies having been built up. For the purpose, methods and systems for technical inheritance of advanced techniques like the skilled engineers are needed which can train the unskilled operators and also assist skilled operators. In this research, simulation technology for hot strip rolling mills based on distributed agents is presented aimed to the diagnosis of hot strip rolling mills
with controllers. In the operation of hot strip mills, human
operators try to maintain rolling conditions in an appropriate
situation. To help the operators, it is needed to build an intelligent rolling simulator which can check the whole rolling
performances including control apparatus. To help human experts,
it is necessary to simulate rolling phenomenon considering
operating conditions in detail. It is also required to simulate
results by changing control parameters. Visualization of
three-dimensional rolling process, and simulation of defects
in rolling mills that scarcely occur are studied. In the paper,
development of agent based rolling simulator is presented. |
| Title | A Verification Method for the Risk Management System of the Electric Power Grid (RMS-EPG) using Satellite Communication |
| Author | *Kyeongyuk Min (CAD & SoC Design Center, Hanyang University, Republic of Korea), Kwangkyoon Jung, Kyuwhan O (Korea Electric Power Research Institute, Republic of Korea), Jongwha Chong (CAD & SoC Design Center, Hanyang University, Republic of Korea) |
| Page | pp. 801 - 804 |
| Keyword | verification system, emulation, satellite communication, electric power grid |
| Abstract | In this paper, we propose a verification method for risk management system of the electric power grid (RMS-EPG) using satellite communication network. The RMS-EPG with satellite communication network should be verified with various contingencies for its design and maintenance. For the verification of RMS-PG, the proposed system composed of the satellite communication simulator and the Power flow emulator. Proposed simulator of satellite communication can evaluate not only the delay of communication with satellite but also the robustness of satellite communication according to the change of weather using simulation model for ITU-R 839. And the proposed emulator of Phase Measurement Unit for Satellite communication (sPMU) can realize its function that calculates the voltage stability by hardware implementation using FPGA. Using the proposed verification system, we verified its function of RMS-EPG for the power grid of Jeju Island in Korea |