Judul: Modifikasi desain dan uji unjuk kerja mesin pengempa briket semi mekanis tipe kempa ulir (screw pressing)
Abstrak: Energi merupakan bagian yang paling penting dalam setiap kegiatan manusia. Konsumsi energi di Indonesia semakin lama semakin meningkat seiring dengan bertambahnya jumlah penduduk dan peningkatan kebutuhan energi di segala sektor terutama sektor industri dan pertanian. Selama ini bangsa Indonesia sangat tergantung pada energi yang berasal dari fosil. Padahal semakin lama energi tak terbarukan ini semakin menipis ketersediaannya. Penandatanganan kebijakan energi oleh Presiden Indonesia pada Februari 2006 semakin menyadarkan kita akan pentingnya pemanfaatan energi alternatif terbarukan.
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Judul: Pengembangan Konsep Desain Pengempa Briket Semi Mekanis Tipe Kempa Ulir untuk Arang Tandan Sawit Kosong
Abstrak: . Empty bunches from palm were waste with high benefit but less used optimum. One of the way to increase the benefit from this waste was to use it as the raw material of bunches briquette. Making of briquette pressing machine was used to increase the better quality of briquette. Types of briquette machine were regular pressing tool, mechanic pressing tool and hydraulic pressing tool. The objective of this research was to develop the previous design of briquette pressing machine into machine which can work in optimum. On this research has modified from previous machines owned by Endah Marwati (2006) and Irwan Darmawan (2008). Design modification has create a design of briquette pressing machine semi mechanic type of screw pressing with power needed for 7.453 Watt hour/kg less than if compared with Irwan darmawan’s power needed as 17.1486 Watt hour/kg while Endah Marwati power needed for 10.6734 Watt hour/kg. This was caused by the certain modification especially on briquette pressing part both material and dimension. Besides that, the characteristic of briquette raw material affected the pressing process. This was also indirectly affected level power needed by that machine, the harder material and the more material needed to be pressed there will increase the needed of power
Keyword: briquette pressing, design, briquette

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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