Judul: Mata Pencaharian Utama dan Alternatif Nelayan Gillnet di Pangkalan Pendaratan Ikan Logending, Kebumen, Jawa Tengah.
Abstrak: Kesejahteraan nelayan gillnet khususnya nelayan ABK yang masih rendah merupakan salah satu masalah di Pangkalan Pendaratan Ikan Logending. Hal ini disebabkan pendapatan dan tingkat pendidikan nelayan yang juga relatif rendah. Untuk meningkatkan pendapatan, nelayan gillnet melakukan pekerjaan alternatif atau pekerjaan di luar mata pencaharian utama. Penelitian ini bertujuan untuk mendeskripsikan usaha perikanan gillnet di lokasi studi, dan menganalisis mata pencaharian alternatif nelayan tersebut. Dalam penelitian ini, mata pencaharian utama dan alternatif nelayan gillnet juragan dan ABK dianalisis untuk mengetahui besarnya penghasilan total. Hasil penelitian menunjukkan bahwa pendapatan utama nelayan gillnet juragan rata-rata sebesar Rp3 237 513 per bulan, sementara pendapatan rata-rata ABK masih di bawah Upah Minimum Regional Kabupaten Kebumen yaitu sebesar Rp1 388 706 per bulan (UMR = Rp1 433 900). Untuk itu, sebagian besar nelayan melakukan pekerjaan alternatif untuk menambah pendapatan. Mata pencaharian alternatif tersebut meliputi ternak sapi, usaha warung, dan penyadapan nira yang masing-masing dapat menambah pendapatan rata-rata sebesar Rp496 666, Rp409 143, dan Rp435 193 per bulan.
Keyword: Logending, pencaharian alternatif, pencaharian utama, perikanan gillnet

Judul: Analisis mata pencaharian alternatif nelayan gillnet di Desa Batukaras, Kecamatan Cijulang, Pangandaran, Jawa Barat
Abstrak: Fishermen in Batukaras generally using bottom set gillnets. Activities of fishing operations using the hunting system and depend on the season. The purpose of this study is to describe the gillnet fishing unit and analyze the work done by the fishermen, both fisheries and alternative livelihoods (non-fisheries). The method of this research using survey methods and data collection techniques by purposive sampling. Analysis of the data used in the form of analysis of fishing unit and financial analysis that includes the analysis of income and revenue cost ratio (R/C). The results of the analysis of fishing unit showed that gillnet construction consist of buoys, head and ground ropes, net body, neck strap, and sinker. Gillnet was operated by 2-3 fishermen using the boat which its length (L) 9.00 meters, breadth (B) of 1.50 meters, and depth (D) 1.00 meters. The work done by gillnet fishermen is fisheries effort and alternative livelihoods. Based on the financial analysis has result that average of fishermen income is Rp 693.297 per month and the value of R/C of 1.31 (R/C> 1), so fisheries effort is profitable and feasible to be developed. alternative livelihoods undertaken by the fishermen including agriculture, albizia wood cultivation, collecting firewood, collecting coconuts, used goods sellers, kiosk, and gardening cardamom. Based on the financial analysis has result that average of alternative livelihoods is Rp 445.347 per month and the value of R/C obtained from all alternative livelihoods is more than one, so the alternative livelihoods businesses profitable and feasible to be developed. This is supported by the result of the pattern of business implementation, in which all alternative livelihood done on famine and moderate, so it does not interfere the main work of the fishermen.
Keyword: Bogor Agricultural University (IPB), gillnet fishermen business, financial analysis, gillnet, Batukaras Village

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