Judul: Analisis Kerusakan Komponen dan Produktivitas Gergaji Rantai di Perum Perhutani Divisi Regional Jawa Timur KPH Madiun
Abstrak: The correct usage of chainsaw will increase the logging productivity. In the other hand, the incorrect usage will cause loss such as decline of the productivity, damage to the chainsaw and also causing occupational accident for the operator. The objectives of this research to find out the damage component, the cause of the damage component in chainsaw and also to find out the effect of the damage component towards logging productivity. The data was collected by analyzing the damage component, the cause of the damage chainsaw component and also by analyzing the effect of the damage component towards logging productivity. The analysis of the damage chainsaw component show that the most frequently damage component are chain, spark plug, piston and sprocket. The lack of understanding about the correct maintenance and treatment way for the tools and the usage of non-original part is one of the factors that cause the damage. The damage of chainsaw component can influence the non-effective work hours which result in the size of productivity.
Keyword: Bogor Agricultural University (IPB), productivity, influence, damage, component, chainsaw

Judul: Analisis Biomekanik Operator Chainsaw pada Kegiatan Bucking Pohon Jati di Perhutani KPH Madiun Jawa Timur.
Abstrak: Operator Chainsaw dihadapkan pada faktor fisik di tempat kerja yang meliputi postur janggal saat menebang dan mengangkat beban berat chainsaw. Resiko tersebut apabila tidak diperhatikan dapat menyebabkan pekerja mengalami cedera seperti nyeri, mati rasa, bengkak, kekakuan, dan lain-lain yang secara langsung dapat mempengaruhi produktivitas. Titik ruas tulang belakang (L5/S1) merupakan salah satu titik yang paling rawan terhadap kecelakaan kerja. Hasil analisis biomekanik untuk kegiatan pembagian batang menujukkan postur berdiri membungkuk dan postur menungging termasuk dalam kategori membahayakan bagi pekerja dan perlu dilakukan tindakan perbaikan. Upaya untuk menghindari terjadinya resiko cedera pada titik ruas tulang belakang (L5/S1) yaitu, perlu dilakukan perbaikan terhadap postur kerja operator chainsaw dengan mengubah postur pekerja dan mengganti pemakaian chainsaw yang lebih ringan.
Keyword: antropometri, biomekanik, ergonomika, pembagian batang, postur tubuh

Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera