Judul: Pemanfaatan Turbin Ventilator sebagai Sumber Tenaga Listrik
Abstrak: The increasing demand for electrical energy in Indonesia becomes one of the national problems. The wind energy which is relatively abundant at some places in Indonesia could become an alternative energy resources to fill those needs. Wind energy is converted into mechanical energy by wind turbine. In wind turbine, the energy of motion is converted into electrical energy by a generator. Ventilator turbine is capable to rotate 24 hours and mostly used as suction fan in factories roof, warehouses, gyms, etc. This research is aimed to use the ventilator turbine to produce electricity. This ventilator wind turbine consists of motorcycle where the number of coils was varied for each data. The number of coils used are varied as 3200, 4000, 4800 and 5600. The average electrical voltage generated from the 3200, 4000, 4800 and 5600 coil at high speed was 4.62 Volt, 6.23 Volt, 6.99 Volt and 8.50 Volt while the average electrical voltage generated at medium speed is 3.49 Volt, 4.69 Volt, 4.45 Volt and 6.00 Volt.
Keyword: Bogor Agricultural University (IPB), ventilator turbine, output voltage, generator, coil

Judul: Karakteristik pompa sentrifugal sebagai penggerak generator listrik pedesaan
Abstrak: Pengembangan listrik pedesan merupakan salah satu program penting didalam kebijaksanaan energi di Indonesia. Untuk melaksanakan program ini telah dicoba beberapa proyek pembangunan pemanfaatan energi alternatip selain energi konvensional untuk pembangkit tenaga listrik. Diantara energi alternatip tersebut adalah, energi biomassa, energi matahari, energi angin, energi dll dalam skala kecil. air bahan cukup Harga terpencil oleh pemerintah. Listrik bakar mahal minyak walaupun terutama didaerah masih disubsidi Sedangkan kemampuan Perusahaan Umum (PLN) dalam daerah pedesaan masih sangat usahanya melistriki terbatas dan sampai akhir Repelita V diperkirakan hanya mampu memenuhi Negara 40% dari Energi total air 65.000 desa di Indonesia. di Indonesia diperkirakan dapat membangkitkan daya sebesar 75.624 MW 3.8 % yang telah dieksploitasi. dan baru sekitar Diproyeksikan pada akhir Repelita V, andil sebanyak listrik tenaga energi mikrohidro dapat memberikan 24.47 MW melalui mikrohidro (PLTMH). pembangkit Pada dipedesaan beberapa lokasi terdapat pompa daerah air aliran sungai (DAS) yang sebelumnya digunakan untuk irigasi. Adanya pengembangan dibidang pencetakan lahan persawahan baru, sistem dibuat lebih terpadu sehingga kemungkinan pengairan pompa air yang lama tidak dimanfaatkan lagi. Dalam kondisi ini, pompa tersebut dapat difungsikan menjadi turbin air dengan modifikasi instalasi pipanya. Tujuan penelitian ini adalah (1) Menentukan kinerja pompa sentrifugal sebagai PLTMH. (2) Menentukan hubungan antara daya (P), tinggi jatuh (H), efisiensi (?) dan putaran turbin (N) pada berbagai posisi bukaan katup.
Keyword: Centrifugal system

Judul: Mud Crab’s (Scylla serrata Forskal 1775) Response to Different Decaying Level of Gold Snail (Pomacea canaliculata Lamarck 1822) Bait.
Abstrak: Mud crab is well known as omnivorous-vigorous-voracious-opportunistic-scavenger. These intertidal animals applies mainly chemoreception in their predatory behaviour. It has been commonly assumed that non fresh gold snail bait is better than fresh bait in stimulating the mud crab. This research's aim is to analyze mud crab response to different decaying level of gold snail bait. Their response were observed as time required to touch the bait and pattern and direction of the mud crab in approaching the baits. The different decaying level of gold snail baits were shown on Total Volatile Base Nitrogen (TVBN) as 16.3 mg/100g (0 day); 534.1 mg/100g (3 days); and 887.4 mg/100g (6 days). The research was conducted from July 2009 until February 2011. The TVBN test for gold snail baits were conducted at Laboratory of BBPPHP Jakarta. The experiment was conducted in Pemalang. The result showed that the average period of mud crabs to touch the baits were 52.14 minutes; 61.57 minutes and 52.57 minutes. Anova test concluded no sufficient evidence of significant effect of TVBN content of gold snail bait on mud crab’s feeding behaviour. Movement pattern B, i.e. left and right deviation followed by straight forward movement to the bait, was commonly exhibited by the crabs. Consequences of time period required by the mud crab to approach the bait on fishing operation is discussed.
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