Judul: Identifikasi Keselamatan Kerja Nelayan pada Aktivitas Payang di Palabuhanratu, Sukabumi Jawa Barat
Abstrak: The study aimed to describe the fishing activity of the boat seine also to identify the potential hazard or the working risk on the operating of the boat seine in Palabuhanratu. A case study of safety was used on one of the boat seines in Palabuhanratu. Descriptive analysis was used to describe the activities of pre-operation, operation process until post-operation process of the boat seine. Detail description included of the fishing unit and the fishing activity on the boat seine fishery. Job safety analysis (JSA) was used to examine the working method and to determine the potential hazards at every step of the boat seine activity. Based on the result, it was known that the activity of the operation of the boat seine consisted of 13 events, which was divided into 3 stages. The first was pre-operation, which were from preparation on the fishing base, transfer to the ship, sailing to the fishing ground and the gear preparation. The second was operation process, which were setting and hauling the fishing gear. The third was post-operation, which were handling the catch, sailing towards the harbor and then transferring the equipment and the catch from the ship to the dock. JSA analysis result showed that the risk arising was the category of accident which were not severe, severe and very severe. The risk caused by the lack of safety equipment, the tool operation and the skill of the boat seine fisherman. Identified potential hazards at payang activity is 92% in the minor accident class category. Potential hazards in accident class category have a percentage of 8% and the percentage of severe accident class category is 0%. The risks of potential hazards in boat seine operation are caused by the lack of safety equipment, tools and fishermen skills.
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Judul: Potensi Kecelakaan Kerja Pada Kapal Angkut dan Alat Tangkap Bagan Apung di PPN Palabuhanratu, Jawa Barat
Abstrak: The study were aimed to describe the activities of ship carrier and bagan apung (lift net) in Palabuhanratu bay, to identify the potential hazard or risk during operating of the bagan apung in Palabuhanratu, and to identify the fishermen knowledge in working safety and the role of engaged institutions to fishermen safety. Primary and secondary data were collected in this research. Primary data were obtained by interview through questionnaire. Secondary data were obtained through literature study concerning fishermen safety occupational. Descriptive analysis was used to describe the activities of pre operation, operation, and postoperation processes of the bagan apung. Detail description included of the transportation ship unit, the fishing unit and the fishing activity on the bagan apung fishery. Job Safety Analisys (JSA) was used to examine the working method and the potential hazard at every step of the ship carrier and the bagan apung fishery activity. The result showed that, (1) based on Job Safety Analisys the risk arising were categorized into 3 of accident which were not severe (88%), severe (12%) and very severe (0%); (2) The fishermen having knowledge were categorized as good enough regarding occupational safety and procedures work on a ship. However, lack of awareness of the relevant agencies and fishermen in the management and implementation of work safety procedures in PPN Palabuhanratu had not been implemented properly.
Keyword: Bogor Agricultural University (IPB), ship carrier, Palabuhanratu bay, job safety, bagan apung

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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