Judul: Improving Supervisors' OSH Knowledge Field Supervisors in Logging Operations through Safety Game in BKPH Parung  Panjang KPH Bogor
Abstrak: Keselamatan dan kesehatan kerja (K3) di sektor kehutanan merupakan hal yang sangat penting sebagai bentuk perlindungan terhadap pekerja. Safety game merupakan instrumen yang dibuat oleh Prof. Dr. Efi Yuliati Yovi, S. Hut., M.Life.Env.Sc., terbukti efektif dalam penyebarluasan informasi mengenai K3 bagi pekerja kehutanan. Penelitian ini bertujuan membuktikan pengaruh safety game dalam peningkatan pengetahuan K3 dan mengidentifikasi strategi uji coba safety game yang efektif dalam peningkatan pengetahuan K3 supervisor lapangan di BKPH Parung Panjang melalui metode yang diberikan. Metode yang digunakan dalam penelitian ini adalah metode full set dan half set. Hasil penelitian ini menunjukkan bahwa safety game terbukti meningkatkan pengetahuan yang signifikan tentang K3 terhadap supervisor lapangan setelah lima kali pengulangan permainan. Strategi yang tepat dilakukan yaitu pengelompokkan permainan berdasarkan karakteristik pekerja dengan metode full set atau half set sebagai upaya pengoptimalan program pembelajaran K3. Hasil penelitian ini dapat digunakan sebagai acuan dalam menentukan metode yang tepat dalam meningkatkan pengetahuan K3 sesuai karakteristik pekerja., Occupational safety and health (OSH) in the forestry sector is very important as a form of protection for workers. Safety game is an instrument created by Prof. Dr. Efi Yuliati Yovi, S. Hut., M.Life.Env.Sc., proven effective in disseminating information about OSH for forestry workers. This study aims to prove the effect of safety games in improving OSH knowledge and identify safety game trial strategies that are effective in improving OSH knowledge of field supervisors in BKPH Parung Panjang through the given method. The methods used in this study are full set and half set methods. The results showed that the safety game was proven to significantly increase the OSH knowledge of field supervisors after five repetitions of the game. The right strategy is to group games based on worker characteristics with the full set or half set method as an effort to optimize the OSH learning program. The results of this study can be used as a reference in determining the right method in improving OSH knowledge according to worker characteristics.
Keyword: ergonomi, keselamatan dan kesehatan kerja (K3), pemanenan hutan, ergonomics, forest harvesting, occupational safety and health (OSH)

Judul: Kinerja Safety Game untuk Peningkatan Aspek Pengetahuan K3 Supervisor Lapangan dalam Kegiatan Penebangan di KPH Bogor
Abstrak: One of the jobs in the forest which is continuously exposed to a high accident risk is a timber cutter. The use of a chainsaw for the main wood cutting tool and the process of felling trees may trigger an accident. Focusing on achieving high productivity often makes workers neglect the aspects of OSH, resulting in undesirable accidents, which in the worst case can take lives and bring a big loss to the company where the workers concerned work. Therefore, it is a must for forestry workers to have good knowledge of OSH. And, safety game is actually a learning instrument designed to improve workers’ knowledge on Occupational Safety and Health (OSH) so that they can work safety in the forest. Safety game is a board game that can be played by anyone anytime, and it does not cost a lot of money. This instrument had been proven to be able to increase the knowledge of field supervisors on OSH after the safety game was tested with 5 replications.
Keyword: work accident, safety game, OSH, felling, field supervisor

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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