Judul: Impact of Portable FAD Operation on Social Conflict, Productivity and Composition of Fish Size in Hand-line Fishing
Abstrak: Pancing ulur merupakan salah satu alat tangkap yang banyak digunakan di Kepulauan Seribu, khususnya di Pulau Panggang. Namun, Ketidaktersediaan informasi daerah penangkapan ikan berakibatkan rendahnya hasil tangkapan pancing ulur. Hal ini dapat berdampak terhadap rendahnya produktivitas tangkapan dan degradasi daerah penangkapan ikan. Penggunaan teknologi rumpon portable diharapkan dapat menciptakan daerah penangkapan ikan dan mengantisipasi timbulnya degradasi daerah penangkapan ikan. Penelitian ini bertujuan untuk mengidentifikasi persepsi nelayan terhadap penggunaan rumpon portable, menghitung produktivitas dan menganalisis kelayaktangkapan ikan serta menganalisis dampak pengoperasian rumpon portable dalam perikanan pancing ulur. Metode penelitian dilakukan dengan wawancara dan kegiatan experimental fishing sebanyak 16 trip. Hasil penelitian menunjukkan bahwa 50% nelayan memiliki persepsi positif, 40% netral dan 10% tidak setuju terhadap penggunaan rumpon portable. Produktivitas pancing ulur di sekitar rumpon portable sebesar 2,018 kg/trip, dan tanpa rumpon 1,841 kg/trip. Hasil tangkapan pancing ulur di sekitar rumpon portable menunjukkan 62,60% layak tangkap dan 37,40% tidak layak tangkap sedangkan tanpa rumpon 58,93% layak tangkap dan 41,07% tidak layak tangkap. Penggunaan rumpon portable memiliki keunggulan diantaranya: produktivitas tangkapan yang banyak, jenis tangkapan beragam, dan komposisi ikan kategori layak tangkap yang banyak. Namun, sebagian besar (60%) nelayan beranggapan bahwa adanya sikap kecemburuan sosial oleh nelayan tanpa rumpon terhadap nelayan pengguna rumpon., Hand lines is one of the fishing gear that is widely used in the Seribu Islands, especially on Panggang Island. However, the unavailability of information on fishing grounds resulted in low hand line catches. This can have an impact on low catch productivity and degradation of fishing grounds. The use of portable FAD technology is expected to create artificial fishing grounds and anticipate the onset of degradation of fishing grounds. This study aims to identify fishermen’s perceptions of the use of portable FAD, calculate the productivity and analyze sustainability of fish and analyze the impact of operating portable FAD in Hand line fisheries. The research method was conducted with interviews and experimental fishing activities as many as 16 trips. Research shows that 50% of fishermen have a positive perceptions, 40% are neutral and 10% disapprove of the use of portable FAD. The productivity of hand lines around the portable FAD is 2.018 kg/trip, and without portable FAD 1.841 kg/trip. The catches of hand lines around portable FAD showed 62.60% were eligible for capture and 37.40% were not eligible for capture, while without portable FAD 58.93% were eligible for capture and 41.07% were not eligible for capture. The use of portable FAD has advantages includes the productivity of many catches, the type of catch varies, and the composition of fish categories eligible for capture a lot. However, the vast majority (60%) of fishermen think that there is an attitude of social jealousy by fishermen without FAD towards fishermen who use of FAD.
Keyword: degradation, Fishing ground, Hand line, Portable FAD

Judul: Application of eFAD-3 Portable FAD on Handline Fishing for Small Fishers in Cianjur
Abstrak: Pancing ulur merupakan alat tangkap berskala kecil untuk menangkap ikan pelagis maupun demersal. Pengoperasian pancing ulur di Jayanti belum memanfaatkan alat bantu untuk pengoptimalan hasil tangkapan karena mahalnya harga dan kurangnya informasi. Oleh karena itu, penggunaan rumpon portable dengan spesifikasi yang lebih murah diharapkan dapat meningkatkan efisiensi operasi penangkapan melalui terbentuknya daerah penangkapan. Penelitian bertujuan mendesain rumpon portable untuk perikanan pancing ulur skala kecil, menghitung komposisi hasil tangkapan, dan membandingkan produktivitas hasil tangkapan diantara lokasi pengoperasian rumpon dan tanpa rumpon. Metode penelitian menggunakan experimental fishing dengan ulangan sebanyak 16 trip. Hasil penelitian menunjukkan rumpon portable eFAD-3 berbahan dasar HDPE berukuran 4 inci dengan komponen penyusun baterai lithium 18650 3,7V, MP3 player 5V, stepdown DC 5V, BMS 3S 60 A 12V, dua speaker 3 inci 60 watt 8 ohm, 4 inci 20 watt 4 ohm. Layur adalah hasil tangkapan terbanyak dengan rumpon sebanyak 24 ekor (41%). Selar tetengek terbanyak kedua yaitu 12 ekor (20%). Kakap merah 11 ekor (19%), tongkol banyar 5 ekor (8%), kerapu dan barakuda masing-masing 3 ekor (5%), dan ikan terbang 1 ekor (2%). Nilai produktivitas rumpon portable adalah 0,50 kg/trip dan tanpa rumpon portable adalah 0,54 kg/trip. Nilai produktivitas tanpa rumpon lebih tinggi dari pada menggunakan rumpon., Hand line is a small fishing gear to catch pelagic and demersal fish. Hand line operations at Jayanti have not utilized tools for optimizing catches due to high prices and lack of information. Therefore, the use of portable FADs with cheaper specifications is expected to increase operating efficiency through how to regulate them. The research aims to design portable FADs for small-scale hand line fishing, determine catches, and compare catch productivity between FAD operating locations and without FADs. The research method uses fishing experiments with 16 repetitions of trips. The result study showed that the eFAD-3 portable FAD made from HDPE measuring 4 incies with the components of a 3.7V 18650 lithium battery, 5V MP3 player, DC 5V stepdown, BMS 3S 60 A 12V, two 3 inci 60 watt 8 ohm speakers, 4 inci 20 watt 4 ohm. Layur is the catch with FADs is 24 Slug Fish (41%). The second largest tetengek snake was 12 fish (20%). 11 red snapper (19%), 5 mackerel (8%), 3 grouper and barracuda (5%), and 1 flying fish (2%). The productivity value of portable FAD is 0.50 kg/trip and without portable FAD is 0.54 kg/trip. The value of productivity without FADs is higher than using FADs.
Keyword: Cianjur, fishing ground, hand-line, portable FAD

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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