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The production gap between oil palm smallholder-owned plantations and corporations shows a real problem in the national palm oil industry. To reduce the gap, user-friendly assistance for smallholder-owned plantations is needed for the cultivation of sustainable palm oil production. Android-based software can be a platform for bridging the transfer of knowledge and technology, transfer of problems, and transfer of solutions between planters and experts. The platform development was formulated in five stages which began with Learning Management System (LMS) application development, identification of Good Agricultural Practices (GAP) and Best Management Practices (BMP) materials, development of digital contents, uploading the digital content to the LMS server, and dissemination. The curriculum in the application platform was prepared based on the needs of the growers according to the identification results of the farmers' profiles. The curriculum consists of GAP and BMP material blocks. Each block was divided into discussion topics. The digital contents related to GAP and BMP were set in the LMS, which was built using Moodle platform. [ABSTRACT FROM AUTHOR]

This paper describes a technique to achieve low harmonics and unity power factor for a three-phase controlled rectifier based dc motor drive by applying a simple current injection topology. This scheme consists of a thyristor bridge, three bi-directional current by-pass switches, and a simple current shaping network. The bi-directional switches are switched at double the line frequency while its current shaping network consists of only two capacitor and three resistors. Input current THD and power factor of the controlled rectifier is within acceptable limit even some variation in bridge working conditions, due to changes in either load or bridge delay angle are happened. The scheme provides a simple, light, fast, and economical upgrading to controlled rectifier based DC drives. The effectiveness of this method has been confirmed by both simulation and laboratory tests. [ABSTRACT FROM PUBLISHER]