Judul: Fishermen's Understanding of Shipping Navigation Aids at Muara Angke Fishing Port
Abstrak: Sarana bantu navigasi pelayaran (SBNP) merupakan peralatan atau sistem yang berada di luar kapal. Sistem ini didesain dan dioperasikan untuk meningkatkan keselamatan dan efisiensi bernavigasi kapal atau lalu lintas kapal dan berperan penting dalam bidang pelayaran domestik maupun internasional. Penelitian ini bertujuan untuk menilai pemahaman nelayan terhadap pentingnya keberadaan sarana bantu navigasi pelayaran dan alur pelayaran di PPN Muara Angke. Penelitian ini menggunakan metode survey dengan nelayan kapal perikanan sebagai nara sumber. Hasil penelitian menunjukkan sarana bantu navigasi pelayaran yang terdapat di Muara Angke berdasarkan jenisnya yaitu terdapat rambu suar dan pelampung tanda untuk jenis visual, radio untuk jenis elektronik dan tidak ditemukan untuk jenis audible. Tingkat pemahaman nelayan terhadap sarana bantu navigasi berada dalam kategori tidak paham. Nelayan yang paham terhadap sarana bantu navigasi pelayaran hanya 30%. Nahkoda kapal yang mengetahui apa itu SBNP hanya 23,33% dan yang tidak mengetahui apa itu SBNP cukup besar yaitu 76,67%., Navigation aids are equipment or systems outside the ship. This system is designed and operated to improve the safety and efficiency of ship navigations or ship traffics and plays an important role in the regional and international shipping area. This study aims to increase fishermen's understanding of the importance of the existence of shipping navigation aids and shipping channels at Nusantara Fishing Port Muara Angke. The study was conducted by Survey with fishing vessel’s Fisherman Captaints as informants. The results of the study showed that the shipping navigation aids found at Muara Angke were based on their type, such as lighthouses and sign buoys for visual types, radio for electronic types, but there were not found for the audible type. The level of fishermen who understand the navigation aids were in the category of not understanding. Only 30% of fishermen who understand shipping navigation aids. Only 23.33% of ship captains who know what the shipping navigation aids were, and those who did not know what navigation aids were was quite large, 76.67%.
Keyword: Pengetahuan, PPN Muara Angke, SBNP

Judul: Mooring and Anchoring Services Enhancement for Purse Seiner at Pengambengan Fishing Port
Abstrak: Pelabuhan Perikanan Nusantara (PPN) Pengambengan memiliki fungsi pemerintahan berupa pelayanan jasa tambat labuh kapal perikanan. Jasa tambat labuh tersebut dirasa kurang karena terdapat 20 kapal slerek (Purse Seine) yang memilih untuk berlabuh di luar kolam pelabuhan. Penelitian ini bertujuan untuk mengoptimalkan jasa tambat labuh kapal slerek dengan mengidentifikasi aktivitas pendaratan hasil tangkapan serta faktor-faktor yang mempengaruhi nelayan untuk menambatkan kapal, kemudian dirumuskan strategiyang dapat diambil oleh pihak pelabuhan. Penelitian dilakukan melalui observasi secara langsung dan wawancara terhadap nelayan dan aparatur pelabuhan menggunakan metode purposive sampling. Hasil penelitian menunjukkan bahwa terdapat penurunan pendapatan retribusi sebesar Rp146.804.400,00 per tahun akibat nelayan yang memilih untuk berlabuh di luar kolam. Didapatkan pula faktor yang mengakibatkan nelayan tidak bertambat di dermaga seperti sedimentasi, tarif mahal, letak kapal tidak teratur, dan tidak adanya hukum yang memaksa. Strategi kemudian dirumuskan menggunakan pembalikan akar masalah pada diagram fishbone., Pengambengan fishing port had government function in the form of mooring and anchoring services for fishing vessels. The services was inadequate since there were 20 purse seiners anchoring outside the pool. This research aims to optimize purse seiners mooring services by identify unloading activities and factors that influence fishermen to moor ships, then formulating strategies that can be done by the port. The research was conducted through direct observation and interviews with fishermen and port officials using the purposive sampling method. The results show that there was reduction in income for IDR 146.804.400,00 per year due to fishermen choose to be anchoring outside the pond. It was also found that factors resulted in fishermen not mooring at the wharf, such as sedimentation, high rates, irregular boat locations, and the absence of compelling laws. The strategy was then formulated by reversing the root cause from fishbone diagram.
Keyword: sedimentasi, pelabuhan perikanan, tambat labuh, anchoring, fishing port, sedimentation

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
Keyword: