This study aims to determine the effectiveness and practicality of interactive video-based PowerPoint media implemented in learning. This research and development phase refers to the Research and Development (R&D) method. The assessment instruments consist of: (1) Validity instruments in the form of validity assessment instruments based on interactive video PowerPoint media; (2). Practicality instruments in the form of questionnaires for teacher and student responses to interactive video-based PowerPoint media; and (3) Effectiveness instruments in the form of observations of learning outcomes and student learning outcomes. Based on data analysis, obtained an average level of media validity of 3.99 and included in the valid criteria. Also, the practicality test results are seen from the teacher's response to learning by 4.4 and the response of students by 3.46 with practical criteria. This is supported by the results of students' learning tests on the use of interactive video-based PowerPoint media with an average score of students learning outcomes of 70.29. Therefore, it can be concluded that the interactive video-based PowerPoint media developed is effective and practical in the implementation of learning. On the other hand, the development of this media focuses on the concept of integrated learning video learning using PowerPoint and concentrates on interactive learning.

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Abstract. Sukmawati S, Rosalina F, Sipriyadi, Dewi NK, Yunita M, Sarhan ART, Rahayu Y, Kusumawati E. 2022. Short Communication: Bacterial diversity of mangrove ecosystem in Klawalu Sorong, West Papua, Indonesia. Biodiversitas 23: 1427-1432. The mangrove ecosystem is a producer of detritus and a source of nutrients and organic matter. Some of the ecological functions of mangrove forests are coastline protector, preventing seawater intrusion, as a habitat for various living creatures, a microclimate regulator, a nursery ground, spawning ground, as well as a feeding ground for various aquatic biota. The mangrove forest ecosystem cannot be separated from the role of microbes in helping the process of soil biochemical cycles. In the biochemical cycle, microbes are able to maintain the availability of macronutrients in the soil. The objective of this study was to identify the diversity of bacteria in the mangrove ecosystem in Klawalu, Sorong City. The research method descriptively described the diversity of bacterial species found in the mangrove ecosystem in Klawalu, Sorong City, West Papua Province. The results indicated that the DNA fragments of the four isolates obtained from this study were around 1300 bp. Meanwhile, the bacterial species obtained were isolated SA3, identified as Bacillus safensis strain C251, isolate SA8 identified as Bacillus amyloliquefaciens strain NO10, isolate SL8 was identified as Clostridium sp. JC336, and isolate SL1 was identified as Bacillus australimaris strain IIHR GAPB01.

Global Positioning System (GPS) merupakan teknologi yang sangat penting karena membantu untuk menentukan posisi koordinat di permukaan bumi. Pelatihan ini bertujuan untuk memberikan pengenalan tentang GPS Garmin, memperkenalkan feature-feature dan fungsi yang ada di dalam GPS Garmin, serta mengetahui respon mahasiswa terhadap pelatihan GPS. Metode dalam kegiatan pelatihan ini menggunakan metode ceramah untuk menyampaikan materi yang bersifat teori dengan menggunakan slide (powerpoint). Selanjutnyanmenggunakan metode demostrasi alat (materi yang bersifat praktek) dengan memperkenalkan alat secara langsung. Metode terakhir yang digunakan dalam pelatihan yaitu metode tanya jawab dan diskusi untuk mempertajam serta memperjelas tingkat pemahaman peserta terkait teori dan cara menggunakan GPS. Berdasarkan hasil pelatihan yang telah dilakukan maka dapat diperoleh informasi bahwa: 1) GPS merupakan sebuah sistem satelit navigasi yang berguna untuk mengetahui suatu posisi di permukaan bumi. 2) Komponen yang terdapat di dalam GPS terdiri dari unit antena sebagai penangkap sinyal satelit, unit display sebagai penampil informasi hasil pembacaan, unit receiver sebagai penerima sinyal satelit untuk memperkirakan posisi. 3) Prinsip kerja GPS adalah pengukuran jarak (range) antara receiver dengan satelit. Dimana pemancaran sinyal satelit yang diterima alat secara pasif paling tidak GPS harus memperoleh sinyal dari 3 satelit untuk dapat menentukan posisi dengan tepat. 4) Kelebihan GPS adalah dapat dioperasikan oleh setiap orang kapan saja dan dimana saja,karena pengoperasisannya yang cukup mudah, serta posisi koordinat geografis dapat diketahui dengan cepat. Namun, GPS juga memiliki kelemahan pada sinyalnya yang lemah karena pengaruh atmosfer serta sulit digunakan di dalam ruangan atau bila terhalang gedung tinggi. selain itu tingkat akurasinya di atas 1 meter apabila digunakan di daerah dengan tutupan kanopi yang lebat (sehingga menyebab pergeseran lokasi).

Maintenance is an activity to maintain facilities or equipment of the factory and make repairs or adjustments to the necessary replacement to satisfactory condition of production operations in accordance with what is planned. Companies often experience damage to the Blowing machine so that interconnected machines cannot be operated. The purpose of this study was to improve the performance of Blowing line 4 engines with the Total Productive Maintenance (TPM) method at PT. Coca-Cola Amatil Indonesia Medan Unit, also to determine the level of Blowing machine performance based on the analysis of overall equipment effectiveness (OEE) at PT. Coca-Cola Amatil Indonesia Medan Unit. The method used in this study is the overall equipment effectiveness (OEE) method to measure Ishikawa’s treatments and diagrams to compare and propose low engine performance. The results of data processing shows machine maintenance has not comply the OEE standards in July 81.48%, August 81.48%, September 78.07%, October 81.22%, November 78.08%, and those that fill the standards in June amount to 86.48%, with losses that most affect the effectiveness of equipment in line 4 blowroom machine is Equipment Failure Losses of 11.42% based on the results of the study, the proposed improvement in engine performance is to provide training to employees, and increase operator awareness. against engine damage, thus the production process will run smoothly.