Judul: Fishermen's Income Level on Cast net Fishing Gear at the Kejawanan Fishing Port
Abstrak: Sumberdaya perikanan yang tinggi dapat dimanfaatkan untuk meningkatkan perekonomian nelayan, namun kenyataanya penghasilan nelayan masih tergolong rendah. Faktor penyebab rendahnya penghasilan yaitu kurangnya modal dan sistem penghasilan yang diterapkan oleh nelayan dengan pemilik kapal. Tujuan penelitian ini mengetahui sistem penghasilan dan menganalisis tingkat penghasilan nelayan cast net di Pelabuhan Perikanan Nusantara Kejawanan. Metode yang digunakan yaitu survei dan melakukan wawancara. Kapal cast net di PPN Kejawanan menerapkan sistem penghasilan bagi hasil dan sistem gaji nelayan. Mekanisme sistem bagi hasil terdapat potongan atas sebesar 27% dari hasil penjualan dan dikurangi biaya operasional, hasil sisa potongan atas yaitu potongan bawah yang akan dibagi 50% untuk pemilik dan 50% untuk awak kapal, sedangkan sistem gaji dengan rata-rata upah harian nelayan cast net untuk KKM sebesar Rp72.273,00, ABK sebesar Rp33.128,00, dan nahkoda sebesar 13% dengan nilai Rp103.231.818,00 dari hasil penjualan kotor dalam satu trip. Tingkat penghasilan perbulan nelayan cast net pada sistem bagi hasil dan sistem gaji untuk nahkoda dan KKM berada diatas UMK, sedangkan untuk ABK masih berada dibawah UMK Kota Cirebon., High fishery resources can be utilized to improve the economy of fishermen, but in reality, the income of fishermen is still relatively low. Factors causing low income are lack of capital and income system applied by fishermen with ship owners. The purpose of this study was to determine the income system and analyze the income level of cast net fishermen in Kejawanan Nusantara Fishing Port. The method used was survey and interview. Cast net vessels in Kejawanan fishing port apply a profit-sharing income system and a fisherman salary system. The mechanism of the profit sharing system has an upper cut of 27% of the sales proceeds and deducts operational costs, the remaining results of the upper cut are the lower cut which will be divided 50% for the owner and 50% for the crew, while the salary system with an average daily wage for cast net fishermen for KKM is IDR 72.273,00, crew is IDR 33.128,00, and the captain is 13% with a value of IDR 103.231.818.00 from the gross sales in one trip. The level of monthly income of cast net fishermen in the profit sharing system and salary system for the captain and KKM is above the minimum wage, meanwhile for the crew is still below the minimum wage of Cirebon City.
Keyword: jala jatuh berkapal, nelayan, penghasilan, PPN Kejawanan

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