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: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik.
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik