Judul: Identification of Potential Hazard in Fishing Vessel Unloading Activities at Bitung Ocean Fishing Port
Abstrak: Aktivitas bongkar merupakan aktivitas yang cukup padat dilakukan di Dermaga PPS Bitung. Kegiatan bongkar hasil tangkapan di PPS Bitung belum adanya SOP mengenai keselamatan saat melakukan operasi bongkar. Penelitian dilakukan dengan tujuan untuk mengidentifikasi kegiatan dan menghitung potensi risiko kegiatan pembongkaran ikan di PPS Bitung. Metode pengumpulan data yang digunakan adalah metode observasi langsung kemudian dianalisis dengan metode HTA (Hierarchy Task Analysis), JSA (Job Safety Analysis) dan analisis deskriptif. Hasil yang diperoleh yaitu terdapat total 40 aktivitas yang dikelompokkan menjadi 3 aktivitas utama yaitu persiapan operasi bongkar, operasi bongkar, dan pasca operasi bongkar, yang memiliki tingkat bahaya dibagi menjadi 5 tingkat bahaya, yaitu 3 (7%) tidak berbahaya, 19 (48%) Ringan, 14 (35%) Menengah, 0 (0%) Berat, dan 4 (10%) Fatal. Pengendalian risiko yang dapat dilakukan untuk memperkecil risiko yaitu dengan meningkatkan kesadaran untuk menggunakan APD pada saat kegiatan bongkar., Unloading activities are quite busy activities carried out at Bitung Ocean Fishing Port Bitung OFP. There is no SOP regarding safety when carrying out unloading operations. The aimed of the research were to identify and calculate the potential risks of fish unloading activities at Bitung OFP. The data were collected by direct observation. The data collected then analyzed using HTA (Hierarchy Task Analysis), JSA (Job Safety Analysis) and descriptive analysis methods. The results showed that there were 40 activities in total unloading process which were grouped into 3 main activities, namely unloading preparation activities, unloading activities, and post-unloading activities. Based on the analysis, all of those activities then divided into 5 group level of hazard. The level of hazard of those activities were 3 (7%) no hazard, 19 (48%) light, 14 (35%) medium, 0 (0%) severe, and 4 (10%) fatal. Risk control that can be carried out to minimize risks is by increasing awareness of using PPE during unloading activities.
Keyword: PPS Bitung, work safety, keselamatan kerja, operasi bongkar, potensi risiko, tingkat bahaya, Bitung Ocean Fishing Port, potential hazard, potential risk

Judul: Potential Hazards in the Loading and Unloading  Activities of Cast Net Ships at Muara Angke Fisheries Port, Jakarta
Abstrak: Kapal Jala Jatuh merupakan kapal cumi terbanyak kedua yang ada di PPN Muara Angke. Aktivitas bongkar merupakan aktivitas utama yang dilakukan setelah kapal berlabuh di dermaga. Aktivitas ini terindikasi memiliki potensi kecelakaan kerja, sehingga perlu adanya identifikasi potensi bahaya pada aktivitas bongkar muat ini. Penelitian ini bertujuan untuk mendeskripsikan aktivitas kegiatan bongkar muat Kapal Jala Jatuh di PPN Muara Angke, mengidentifikasi potensi bahaya pada kegiatan bongkar muat, serta memberikan rekomendasi dan mitigasi untuk meminimumkan risiko kecelakaan kerja pada kegiatan bongkar muat Kapal Jala Jatuh. Metode yang digunakan dalam penelitian ini adalah observasi dan wawancara kepada kapten, ABK dan buruh angkut. Analisis yang digunakan berupa analisis deskriptif, analisis Hierarchy Task Analysis (HTA), dan metode Job Safety analysis (JSA). Hasil penelitian menunjukkan bahwa terdapat 71 aktivitas pada kegiatan bongkar muat. Terdapat 8 (11%) aktivitas dikategorikan tidak berbahaya, 40 (56%) aktivitas dikategorikan bahaya ringan, 19 (27%) aktivitas dikategorikan bahaya menengah, 0 (0%) aktivitas dikategorikan bahaya berat, dan 4 (6%) aktivitas dikategorikan bahaya fatal. Perlu adanya perhatian mengenai keselamatan kerja pada aktivitas bongkar muat seperti kelengkapan alat pelindung diri (APD) terutama pada saat aktivitas bongkar muat, dan juga pengemudi yang bersertifikat guna mencegah terjadinya kecelakaan yang bersifat fatal., Kapal Jala Jatuh is the second most squid fishing vessel at Muara Angke Fisheries Port. Unloading is the main activity conducted after the vessel docks at the pier. This activity is suspected to have the potential for work accidents, thus requiring the identification of potential hazards in this loading and unloading activity. This study aims to describe the loading and unloading activities of Kapal Jala Jatuh at PPN Muara Angke, identify potential hazards in loading and unloading activities, and provide recommendations and mitigation to minimize the risk of work accidents in the loading and unloading activities of Kapal Jala Jatuh. The methods used in this research are observation and interviews with the captain, crew members, and cargo handlers. The analysis includes descriptive analysis, Hierarchy Task Analysis (HTA), and Job Safety Analysis (JSA) methods. The research findings indicate that are 71 activities involved in the unloading process. Among these, 8 (11%) activities are categorized as non-hazardous, 40 (56%) activities as mild hazards, 19 (27%) activities as moderate hazards, 0 (0%) activities as severe hazards, and 4 (6%) activities as fatal hazards. Attention should be given to occupational safety during the unloading activities, such as ensuring the availability of personal protective equipment (PPE), especially during the unloading process, and having certified drivers to prevent fatal accidents.
Keyword: bongkar muat, hta, Kapal Jala Jatuh, jsa, keselamatan kerja, castnet, loading and unloading, work safety

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.
Keyword: