Judul: Occupational Safety During Loading and Unloading Process Fishing Vessel (Case Study of Mini Purseiner at Lempasing Fishing Port, Lampung)
Abstrak: Lempasing fishing port is the largest fishing port in Lampung Province. One of the most widely operated vessel at Lempasing Fishing Port is mini purseiner. There are several activities at the fishing port, namely fish landing activities (loading and unloading) and marketing. Loading and unloading activities at Lempasing Fishing Port are the main activities after a fishing vessel berthing at the pier. Accidents that occur causes losses in the form of delays in loading and unloading activities. The research objectives are to identify activities and hazard potential in loading unloading activities on mini purseiner in Lempasing Fishing Port, to analyze risk opportunities and accident rates that may occur and provide alternative solutions and determine prevention of work accidents. The descriptive, survey, and Hierarchy Task Analysis (HTA) methods were used in this research. The result showed that there were 47 risks of accidents in the loading and unloading activities, as many as 36 (77%) categorized in light risk, 5 (11%) medium risk, 2 (4%) severe risk and 4 (9%) fatal risk. The highest accident risk occurs in unloading activities, because there were a lot of fishers involved and the activities were quite heavy., Pelabuhan Lempasing merupakan pelabuhan perikanan terbesar di Provinsi Lampung. Salah satu kapal yang paling banyak dioperasikan pada Pelabuhan Lempasing yaitu kapal mini purse seine. Terdapat beberapa aktivitas di Pelabuhan Lempasing, yaitu pendaratan ikan (bongkar muat) dan pemasaran. Aktivitas bongkar muat di Pelabuhan Lempasing merupakan aktivitas utama setelah kapal berlabuh di dermaga. Kecelakaan pada kegiatan bongkar muat dapat menyebabkan kerugian berupa terhambatnya aktivitas. Tujuan penelitian yaitu mengidentifikasi aktivitas dan potensi bahaya kegiatan bongkar muat kapal mini purse seine, menganalisis peluang risiko dan tingkat kecelakaan yang mungkin terjadi, memberikan alternatif solusi dan menentukan tindak pencegahan pengendalian kecelakaan kerja. Metode deskriptif, survei, dan Hierarchical Task Analysis (HTA) digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa terdapat 47 risiko kecelakaan pada proses bongkar muat, sebanyak 36 (77%) kegiatan berisiko ringan, 5 (11%) menengah, 2 (4%) kegiatan berisiko berat dan 4 (9%) kegiatan berisiko fatal. Risiko kecelakaan terbesar terjadi pada aktivitas bongkar, dikarenakan individu yang terlibat cukup banyak berkisar antara 20 orang dan aktivitas yang dilakukan cukup berat.
Keyword: loading and unloading, work safety, mini purse seine, HTA

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: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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