Judul: Basic properties, treatability, and finishing properties of tumih (combretocarpus rotundatus miq.) wood from central kalimantan
Abstrak: Penelitian ini bertujuan untuk menganalisis sifat dasar, keterawetan, dan finishing kayu tumih asal Kalimantan Tengah serta menganalisis pengaruh pengeringan awal dengan oven dan microwave terhadap sifat keterawetan dan finishing-nya. Hasil penelitian menunjukkan bahwa kayu tumih berwarna cokelat kemerahan, bertekstur kasar, berserat lurus, permukaan kayu mengkilap, dan bercorak. Pori-pori kayu tersusun dalam pola tata baur, didominasi oleh pori soliter meski dijumpai juga pori yang bergabung radial 2-3 sel. Diameter pori antara 68.50-510.90 μm dan berisi tilosis. Serat kayu tergolong kelas mutu III dengan panjang serat tergolong sedang (1338.39 μm). Kayu tumih lebih disarankan sebagai bahan baku mebel karena memiliki penampilan yang dekoratif, disamping sebagai bahan konstruksi (kelas kuat II; berat jenis = 0.63). Hasil uji keterawetannya memperlihatkan bahwa kayu tumih sukar diawetkan karena retensinya hanya 1.67-2.93 kg m-3 dan penetrasinya 13.22-40.66% atau 2.99-8.50 mm. Sifat finishing-nya tergolong baik (Grade 4B; ASTM D3359-02). Hasil uji finishing ini tidak dipengaruhi secara nyata oleh perlakuan cara pengeringan awal dan pengawetan borax yang diberikan., Tumih wood is a lesser-known wood species that has been used as construction material limitedly in some areas of Borneo Island. This study aimed to analyze the basic properties, treatability, and finishing properties of tumih wood and to analyze the influence of initial drying using oven and microwave to wood’s treatability and finishing properties. The result showed that tumih wood has reddish-brown colour, rough-texture, straight-grain, lustrous, and decorative. Pore distribution is diffuse, dominated by solitary but sometimes in radial-multipled of 2-3 cells. Pore diameter ranged between 68.50-510.90 μm, and contained tylosis. Its fiber was classified as quality class III and had medium length (1338.39 μm). The specific gravity of tumih wood was 0.63 that belongs to strength class II. Tumih wood is suitable for furniture manufacturing. Based on this study, the treatability of this wood was difficult because the preservative retention and penetration were 1.67-2.93 kg m-3 and 13.22-40.66% or 2.99-8.50 mm, respectively. Its finishing property was good (Grade 4B) based on ASTM D3359- 02, which was not affected by pre-drying treatment and borax preservation.
Keyword: anatomi, Combretocarpus rotundatus, finishing, keterawetan, tumih

Judul: Keawetan Alami Kayu Tumih (Combretocarpus rotundatus Miq Danser) dari Serangan Rayap Kayu Kering, Rayap Tanah dan Jamur Pelapuk Kayu
Abstrak: Combretocarpus rotundatus Miq Danser or tumih is known as one of the fast growing species in the peat forests. Tumih wood has a straight trunk that could potentially be a good wood working materials, but there are no studies that describe the natural durability of wood tumih. The objective of this study was to test the natural durability of wood tumih from dry wood termites Cryptotermes cynocephalus Light, subterranean termites Coptotermes curvignathus Holmgren, decay fungus Schizophyllum commune, as well as its field natural durability in the grave yard test. Observed variables in this study were the percentage of termite mortality and weight loss of samples due to termites and fungal attacks. The result showed that the durability of tumih wood was not the same for all wood destroying factors. The natural durability of tumih wood belong to class III of C. cynocephalus, class II of C. curvignathus and class IV of decay fungus S. commune.
Keyword: Bogor Agricultural University (IPB), Schizophyllum commune., grave yard test, Cryptotermes cynocephalus Light, Coptotermes curvignathus Holmgren, Combretocarpus rotundatus Miq Danser

Judul: Implementasi Algoritme Enkripsi Advanced Encryption Standard secara Paralel dengan GPU NVIDIA CUDA
Abstrak: Processor streaming architecture in GPU has provide general purpose computation which have its own potential to help CPU with its parallel computation capability. One example of supported processor streaming architecture is Fermi which is developed by NVIDIA. Furthermore, NVIDIA has developed its own software development kit namely CUDA, which can integrate many popular existing programming languanges such as C++ for GPU-based parallel computation. This research focus on the implementation of parallel AES algorithm with GPU and analyze the performance result of the implementation in two different NVIDIA devices, namely NVIDIA GeForce GT220 and NVIDIA Quadro 600. In general, the performance of parallel GPU computation is better than sequential computation for large data input. It is obtained that the maximum speedup of NVIDIA GeForce GT220 in 8 MB input is 89.3 with 180% efficiency. Higher speedup of 101.6 can be obtained by NVIDIA Quadro 600 with the same input size with around 100% efficiency.
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