Judul: The Dependence of Drift Gillnet Fisherman on Fishing Activities in Karangantu, Banten
Abstrak: Tingginya ketergantungan terhadap kegiatan penangkapan ikan dapat menyebabkan terjadinya penurunan stok sumberdaya ikan dan perlu dukungan dari pemerintah dan pihak PPN Karangantu dalam pemberdayaan nelayan jaring rampus. Penelitian ini bertujuan mendeskripsikan keragaan unit perikanan jaring rampus di Karangantu, mengukur ketergantungan nelayan jaring rampus terhadap sumberdaya ikan di Karangantu, dan merumuskan strategi alternatif untuk mengurangi tingkat ketergantungan nelayan jaring rampus di Karangantu. Metode penelitian yang digunakan adalah metode studi kasus. Penentuan sampel menggunakan purposive sampling dengan sampel sebanyak 32 responden. Analisis data yang digunakan adalah deskriptif, skala likert untuk mengukur ketergantungan nelayan, dan SWOT untuk menyusun strategi untuk mengurangi tingkat ketergantungan nelayan jaring rampus di PPN Karangantu. Hasil penelitian menunjukkan bahwa ketergantungan nelayan jaring rampus terhadap kegiatan penangkapan ikan dikaji dalam 12 kriteria dengan skor 3,76 yang masuk dalam kategori ketergantungan yang "tinggi" pada jaring rampus <5 GT dan skor 3 dengan kategori "cukup tinggi" pada jaring rampus >5 GT., High dependence on this activity can lead to a decline in fish resources, requiring support from the government and PPN Karangantu in empowering drift gillnet fishermen. This research aims to describe the characteristics of drift gillnet fishing units in Karangantu, measure the dependence of drift gillnet fishermen on fish resources in Karangantu, and formulate alternative strategies for reducing the dependence of drift gillnet fishermen in Karangantu. The research method used is a case study method. Sample selection was done using purposive sampling with a total of 32 respondents. The data analysis utilized descriptive analysis and Likert scale to measure fishermen's dependence, and SWOT analysis to develop development strategies for reducing fishermen's dependence. The results show that the dependence of purse seine fishermen on fishing activities was assessed using 12 criteria, with a score of 3,76 indicating "high" dependence for purse seine <5 GT, and a score of 3 indicating "moderately high" dependence for drift gillnet >5 GT
Keyword: drift gillnet, fishermen's dependency, Karangantu

Judul: The Level of Welfare of Drift Gillnet Fishers at the Karangantu Fishing Port Banten
Abstrak: Hasil tangkapan yang didapatkan oleh nelayan tidak selalu sama dalam setiap trip penangkapan, tidak jarang nelayan mendapatkan hasil tangkapan sedikit. Hasil tangkapan mempengaruhi besar kecilnya pendapatan nelayan. Pendapatan nelayan yang tidak pasti menyebabkan nelayan mengalami kesulitan ekonomi dan berdampak terhadap tingkat kesejahteraan nelayan. Tujuan penelitian ini adalah mendeskripsikan kegiatan perikanan jaring rampus, mengklasifikasikan tingkat kesejahteraan nelayan jaring rampus, dan menganalisis pengaruh pendapatan nelayan terhadap kesejahteraan nelayan jaring rampus di PPN Karangantu. Metode pengumpulan data yang digunakan adalah metode observasi dan wawancara. Data dianalisis menggunakan analisis deskriptif, dan analisis kesejahteraan menurut indikator BKKBN, dan analisis regresi linier sederhana. Hasil penelitian ini menunjukkan bahwa kegiatan perikanan jaring rampus di PPN Karangantu menggunakan ukuran kapal 2-5 GT dengan ikan hasil tangkapan yang dominan yaitu ikan kembung dan pendapatan nelayan jaring rampus yang diperoleh dalam satu kali trip melaut sebesar Rp499.000,- hingga Rp2.729.688,-. Nelayan jaring rampus di PPN Karangantu termasuk kedalam kategori Keluarga Pra Sejahtera sebesar 9%, Keluarga Sejahtera I sebesar 63%, dan Keluarga Sejahtera II sebesar 28%. Pendapatan memiliki pengaruh sebesar 16% terhadap kesejahteraan dan 84% nya dipengaruhi faktor lain., The catches obtained by fishers are not always the same in every fishing trip, it is not uncommon for fishers to get small catches. The catch affects the size of the fisher’s income. Uncertain fisher’s income causes fishers to experience economic difficulties and has an impact on the level of fishers welfare. The purpose of this research is to describe drift gillnet fishing activities, classify the level of welfare of drift gillnet fishers, and analyze the effect of fisher’s income on the welfare of drift gillnet fishers in PPN Karangantu. Data collection methods used are observation and interview methods. Data were analyzed using descriptive analysis, and welfare analysis according to BKKBN indicators, and simple linear regression analysis. The results of this study indicate that drift gillnet fishery activities in PPN Karangantu use a boat size of 2-5 GT with the dominant catch of fish, namely mackerel and drift gillnet fishers income earned in one trip to sea of IDR499.000,- until IDR2.729.688,-. Drift gillnet fishers in Karangantu PPN are included in the Pre-Prosperous Family category by 9%, Prosperous Family I by 63%, and Prosperous Family II by 28%. Income has an influence of 16% on welfare and 84% of it is influenced by other factors.
Keyword: jaring rampus, PPN Karangantu, pendapatan nelayan, tingkat  kesejahteraan nelayan

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology