Judul: Utilization of VIIRS Boat Detection and Vessel  Monitoring System for Fisheries Surveillance in The Marine Sanctuary of  Southeast Aru Islands
Abstrak: Kawasan Konservasi Suaka Alam Perairan (SAP) Kepulauan Aru Bagian Tenggara berada di perairan WPPNRI-718, seluas 114.000 ha. Posisi Kabupaten Kepulauan Aru dikelilingi oleh Laut Aru dan Laut Arafura memiliki potensi sumberdaya hayati berlimpah. Tingginya tingkat penangkapan pada WPPNRI-718 membuat peluang bagi kapal penangkapan ikan masuk kedalam zona larang tangkap di kawasan konservasi. Penelitian ini bertujuan memetakan dan menghitung sebaran kapal berdasarkan data VIIRS Boat Detection (VBD) dengan data Vessel Monitoring System (VMS), membandingkan aktivitas pelanggaran antara kedua data dan merekomendasikan pengembangan pengawasan di kawasan konservasi. Penelitian ini menggunakan metode studi kasus berupa pelanggaran kapal penangkapan ikan di kawasan konservasi. Data yang digunakan adalah data VBD, VMS, batas kawasan konservasi dan kalender bulan. Hasil penelitian menunjukan bahwa berdasarkan data VMS, kapal yang terdeteksi berukuran 39- 198 Gross Tonnage (GT) menggunakan 11 jenis alat tangkap. Terdapat pelanggaran oleh kapal bouke ami, pancing cumi, purse seine dan jala jatuh berkapal dengan ukuran 58-148 GT. Pelanggaran banyak ditemukan pada bulan November saat musim penangkapan ikan di sekitar Pulau Enu dan Pulau Karang. Rekomendasi yang disarankan yaitu pengawasan lebih intensif dilakukan pada saat musim penangkapan ikan., The Southeast Aru Islands Marine Nature Reserve is located in WPPNRI- 718, with an area of 114.000 hectares. The position of Aru Islands Regency is surrounded by the Aru Sea and the Arafura Sea, which have enormous potential for biological resources. The Arafura Sea is an ocean where illegal fishing is common. The high rate of fishing in WPPNRI-718 creates opportunities for fishing vessels to enter the no-take zone in the conservation area. This study aims to calculate and map the distribution of fishing vessels based on data from VIIRS Boat Detection (VBD) with Vessel Monitoring System (VMS), compare violation activities between the two data, and recommend the development of surveillance in conservation areas. The distribution of fishing vessels in conservation zones is studied using a case study approach. The data used are VBD, VMS, conservation area boundaries and lunar calendars. The results showed that based on VMS data, the detected vessels were 39-198 Gross Tonnage (GT), which used 11 fishing gear. There are violations by bouke ami, squid jigging, purse seine and cast nets vessels with a size of 58-148 GT. Most of the violations were found in November during the fishing season around Enu Island and Karang Island. The recommended recommendation is that more intensive supervision is carried out during the fishing season.
Keyword: VBD (VIIRS Boat Detection), VMS (Vessel Monitoring System), no-take zones, Illegal fishing, surveillance of fishing vessels

Judul: Utilization of VIIRS Boat Detection and Vessel Monitoring System for the Surveillance of Light Fishing Vessels in Sawu Sea National Marine Park
Abstrak: Tingginya potensi sumberdaya hayati yang dimiliki Laut Sawu membuat peluang terjadinya pelanggaran penangkapan ikan pada malam hari di Taman Nasional Perairan (TNP) Laut Sawu. Penelitian ini bertujuan untuk memetakan sebaran kapal light fishing yang beroperasi dan mendeteksi kemungkinan adanya aktivitas pelanggaran penangkapan ikan di dalam kawasan TNP Laut Sawu serta merekomendasikan tindakan lanjut pengawasan dan pemantauan kapal penangkapan ikan di TNP Laut Sawu. Penelitian ini memanfaatkan data VIIRS Boat Detection dari Earth Observation Group dan Vessel Monitoring System Direktorat Jenderal Pengawasan Sumber Daya Kelautan dan Perikanan KKP selama tahun 2021. Analisis data yang digunakan adalah analisis spasial dan analisis deskriptif. Hasil penelitian menunjukan adanya aktivitas penangkapan ikan yang dilakukan oleh kapal light fishing di TNP Laut Sawu. Aktivitas kapal penangkapan ikan ditemukan pada sekitar Pulau Timor, Sumba, Sabu, Dan Rote. Terdapat deteksi kapal yang diindikasi melakukan pelanggaran penangkapan ikan, jumlah indikasi pelanggaran ditemukan paling banyak pada bulan Januari, Februari, dan Desember tahun 2021, masing masing mencapai 229 deteksi, 231 deteksi dan 167 deteksi. Rekomendasi tindakan lanjut untuk pengawasan dan pemantauan kapal penangkapan ikan di TNP Laut Sawu yaitu memberikan sosialisasi mengenai ketentuan pada setiap zona, peringatan untuk kapal besar yang masuk kawasan konservasi, meningkatkan jumlah patroli serta memanfaatkan citra satelit., The high potential of biodiversity resources in the Sawu Sea creates opportunities fishing violations in the Sawu Sea National Marine Park. This study aims to map the distribution of light fishing vessels operating in the Sawu Sea National Marine Park, detect potential fishing violation activities within the area, and recommend further actions for monitoring and supervising fishing vessels in the Sawu Sea. This study utilizes VIIRS Boat Detection data from the Earth Observation Group and the Vessel Monitoring System of the Directorate General of Marine and Fisheries Resource Surveillance, Ministry of Maritime Affairs and Fisheries, during the year 2021. The data analysis methods employed include spatial and analysis descriptive analysis. The research findings reveal fishing activities conducted by light fishing vessels in the in the Sawu Sea National Marine Park. Fishing vessel activities were found around the islands of Timor, Sumba, Sabu, and Rote. There were vessel detections indicating fishing violation activities, with the highest number of potential violation occurring in January, February, and December 2021, reaching 229 detections, 231 detections, and 167 detections, respectively. Recommendations for further actions in the monitoring and supervision of fishing vessels in the Sawu Sea include conducting awareness campaigns regarding regulations in each zone, issuing warnings to large vessels entering conservation areas, increasing patrol frequencies, and utilizing satellite imagery.
Keyword: kawasan konservasi, light fishing, pengawasan, VIIRS Boat Detection (VBD), Vessel Monitoring System (VMS)

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: