Judul: Work Posture Improvement Using Biomechanical Analysis on  Teak Wood Bucking Activities
Abstrak: The activity of dividing the trunk using a chainsaw is one of the wood harvesting activities that needs to be considered ergonomically. Heavy loads and extreme environments on field workers can cause extreme postures in skeletal muscles. The extreme work postures were selected from the results of the Range of Motion (ROM) analysis which were then analyzed using a biomechanical method with 3DSSPP 7.1.0 Software. The results of the biomechanical analysis include compressive forces on L5/S1, shear forces on disk and L5/S1, strength percent capable, and standing balance. The most extreme working posture is the squat posture on the work element turning the chainsaw on at 3346±231 N and the trunk division element at 3483±242 N, then it is necessary to calculate the Recommended Weight Limit (RWL) and Lifting Index (LI), and choose 1 posture that has a compressive force value of L5/S1 from all work elements, namely in the squatting posture of the working element of the division of the trunk. The RWL value was 11.52 kg, so the LI value was 1.52 which was classified as a moderate risk of injury, The activity of dividing the trunk using a chainsaw is one of the wood harvesting activities that needs to be considered ergonomically. Heavy loads and extreme environments on field workers can cause extreme postures in skeletal muscles. The extreme work postures were selected from the results of the Range of Motion (ROM) analysis which were then analyzed using a biomechanical method with 3DSSPP 7.1.0 Software. The results of the biomechanical analysis include compressive forces on L5/S1, shear forces on disk and L5/S1, strength percent capable, and standing balance. The most extreme working posture is the squat posture on the work element turning the chainsaw on at 3346±231 N and the trunk division element at 3483±242 N, then it is necessary to calculate the Recommended Weight Limit (RWL) and Lifting Index (LI), and choose 1 posture that has a compressive force value of L5/S1 from all work elements, namely in the squatting posture of the working element of the division of the trunk. The RWL value was 11.52 kg, so the LI value was 1.52 which was classified as a moderate risk of injury.
Keyword: biomechanics, bucking, ergonomics, L5/S1, Range of Motion (ROM)

Judul: Analisis Biomekanik pada Kegiatan Penyadapan Getah Pinus Menggunakan Alat Mujitech di KPH Sukabumi
Abstrak: Sistem kerangka manusia mempunyai beberapa titik rawan, yaitu ruas tulang leher, ruas tulang punggung atau Lumbar 5 Sacrum 1 (L5/S1), dan pangkal paha. Tujuan penelitian ini adalah menghitung nilai Range of Motion (ROM) pada postur kerja yang terpilih, menghitung momen dan gaya pada segmen tubuh, serta mengidentifikasi gaya tekan pada bagian L5/S1. Metode yang digunakan adalah analisis ROM dan analisis biomekanik. Postur kerja paling ekstrem adalah postur berdiri pada elemen berjalan dan postur berdiri sangat tengadah pada elemen pembuatan quarre. Gaya dan momen paling besar terdapat pada segmen tubuh bagian punggung. Gaya tekan terbesar yang dihasilkan pada postur berdiri sebesar 1582.21 N dan postur berdiri sangat tengadah sebesar 1088.57 N. Gaya tekan L5/S1 yang diperoleh pada masing-masing postur kerja memiliki nilai dibawah batas gaya angkat normal sebesar 3500 N dan dibawah nilai gaya tekan L5/S1 sebesar 6500 N, sehingga postur tersebut dinyatakan aman. Kata kunci: biomekanik, gaya tekan, mujitech, postur ekstrem.
Keyword: biomekanik, gaya tekan, mujitech, postur ekstrem

Judul: Pembuatan dan Karakterisasi Prototipe Sel Surya Nanokristal n-TiO2/Dye/p-CuSCN
Abstrak: Dengan metode casting dan perlakuan annealing, dapat dibuat lapisan nanokristal semikonduktor TiO, pada substrat Transparant Conductive Oxide (TCO). Penambahan dye Methylviolet Thiocianate (MVSCN) dan lapisan CuSCN pada TiO, tersebut menghasilkan sel surya n-TiO,ldye/p-CuSCN yang dapat menyerap foton dan mengubahnya menjadi energi listrik.
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