With the rapid growth of population and huge energy demand, fossil fuels, which are the most widely used fuel, are running low. One of the things that can be a solution to deal with this problem is utilizing alternative energy sources. The article describes an idea of a perpetual motion machine as one of the options to find alternative energy sources. Using Neodymium magnets as the main component of the machine, the authors built and analyzed the performance of a perpetual motion machine. The method allows improving the machine's performance to generate electricity and its possibilities of future enhancements. The results show that the utilization of neodymium magnets on the machine is considered a better option and effective in generating electricity. However, proper arrangement of the component must be made carefully and accurately to improve the project's performance.

No abstract

A teleoperated robotic system offers a rapid deployment for performing tasks in dangerous environments. An effective teleoperation requires a proper feedback system such as a vision system using cameras. Despite its effectiveness of using camera, the limited field of view (FoV) become one of the main burdens of the operation. To deal with this problem, some researchers used wider-view camera or multiple cameras. In contrast, this research proposed to achieve a better teleoperation by eliminating FoV limit by using 360 camera. This research also aimed to improve the immersive experience by utilizing virtual reality (VR) headset. The proposed framework then developed to accommodate all the requirements and then evaluated by some numerous trials by some participants. An AprilTag marker was placed on the robot and tracked by a ceiling mounted camera to record the trajectory data. The obtained trajectories then measured its performance by using a standard performance metrics. The experiments demonstrated that the proposed method achieved lower collision area, closer to desired ideal path and smoother than using a standard camera as the feedback system. However, as the 360-video streaming induced higher latency, the proposed approach was slower. The measurements justified that the proposed approach achieved a better teleoperation especially for mission critical tasks.

There are two factors that must be considered for the power quality analysis of an electrical power system, i.e. frequency and voltage stability. The system that can return to the initial condition or the steady state after a disturbance occurred indicates that the system is stable. This paper aims to detect the transient stability of three generators, which have identical specification of 2.25 MW 6.6 kV and are operated in parallel, based on the frequency performance. In this paper, the stability analysis is determined by using the nyquist method, where the system stability is indicated by the value of the response curve of the system. The analysis results show that the system of three paralleled generators have the value that far from 1 + j0 and the phase margin value and gain margin tend to be minimum. These values indicate that the system is unstable. The system slowly changes into more unstable because the oscillations are getting bigger until the final state. So, it is necessary to change the parameters of each generator that can affect the system stability during synchronization state.

No abstract