Judul: The Feasibility of Gillnet Operation in Tambak Mulyo Semarang, in terms of Technical, Economic, and Environmental
Abstrak: Mayoritas nelayan Tambak Mulyo menggunakan alat tangkap gillnet. Usaha penangkapan gillnet memiliki beberapa kendala diantaranya musim penangkapan ikan yang tidak menentu dan kenaikan harga BBM yang memicu kenaikan harga kebutuhan melaut lainnya. Oleh karena itu, perlu dikaji kelayakan usahanya untuk melihat keberlanjutan penangkapan nelayan gillnet di Tambak Mulyo. Selain menguntungkan secara ekonomi, pengoperasian gillnet harus dilakukan sesuai dengan peraturan yang berlaku (Permen KP No 18/Permen-KP/2021). Tujuan penelitian ini mengidentifikasi spesifikasi dan jenis alat tangkap gillnet, dimensi utama kapal gillnet, daerah penangkapan ikan (DPI), aspek finansial, dan mengkaji kesesuaian unit penangkapan gillnet terhadap Permen KP No 18 tahun 2021. Metode yang digunakan adalah purposive sampling. Hasil penelitian menunjukkan bahwa alat tangkap gillnet yang digunakan nelayan Tambak Mulyo sesuai dengan kriteria kelayakan teknis yang ditentukan seperti mudah dalam pembuatan/pengadaan, dapat dioperasikan sesuai dengan konstruksi yang diharapkan, mudah dioperasikan, dan dapat menghasilkan tangkapan ikan/target tangkapan. Analisis finansial didapatkan nilai Internal Rate of Return (IRR) sebesar 37,2% dan Payback Period (PP) sebesar 2,6 tahun. Aspek mesh size, dimensi kapal, dan DPI nelayan gillnet sesuai dengan peraturan. Namun, hampir keseluruhan nelayan pada aspek panjang tali ris atas tidak sesuai dengan peraturan., The majority of Tambak Mulyo fishers use gillnet fishing gear. Gillnet fishing has several obstacles, including the uncertain fishing season and the increase in fuel prices which triggers an increase in the price of other fishing needs. Therefore, the study of the feasibility of its business to see the sustainability of gillnet fishing in Tambak Mulyo is necessary. In addition to being economically profitable, the operation of gillnets must be carried out by applicable regulations (Permen KP No 18/Permen-KP/2021). The purpose of this study are identified the specifications and types of gillnet, the main dimensions of gillnet vessels, fishing grounds, financial aspects, and examine the suitability of gillnet fishing units to Marine Fisheries Ministry Regulation No. 18 2021. The method used is purposive sampling. The results showed that the fishing gear used by Tambak Mulyo fishermen was technically feasible according to the technical feasibility criteria determined according to technical criteria, such as easy to manufacture/procure, can be operated according to the expected construction, easy to operate, and can produce fish catch/catch target. Financial analysis obtained an Internal Rate of Return (IRR) of 37.2% and a Payback Period (PP) of 2.6 years. Aspects of mesh size, boat dimensions, and fishing grounds of gillnet fishers by regulations. However, almost all fishers on the aspect of the length of the upper rope do not comply with the regulations.
Keyword: gillnet, policy, feasibility, violation, Tambak Mulyo

Judul: Business Manajemen of Small-Scale Gillnet Fisheries in Palembang City
Abstrak: Secara umum, produksi perikanan tangkap di Provinsi Sumatera Selatan berfluktuasi setiap tahunnya, namun untuk Kota Palembang produksinya cenderung mengalami penurunan dalam beberapa tahun terakhir ini. Hal tersebut diduga usaha nelayan di Kota Palembang dalam kondisi merugi, yang akhirnya akan berdampak pada tingkat kesejahteraan nelayannya. Tujuan penelitian ini untuk mendeskripsikan karakteristik usaha perikanan gillnet skala kecil di Kota Palembang, menganalisis finansial usaha perikanan gillnet skala kecil di Kota Palembang, dan merumuskan strategi manajemen usaha perikanan gillnet skala kecil di Kota Palembang. Metode yang digunakan dalam penelitian ini adalah metode survei dengan menggunakan pendekatan analisis deskriptif, analisis finansial, dan analisis SWOT. Hasil Penelitian menunjukkan bahwa ukuran armada kapal gillnet di Kota Palembang cukup beragam, yakni 16 GT, 17 GT, 18 GT, 20 GT, 25 GT, 27 GT, 28 GT dan 29 GT. Sistem bagi hasil yang diterapkan nelayan gillnet Kota Palembang yaitu 50 : 50, untuk pemilik menerima 50% sedangkan untuk nakhoda dan ABK menerima 50%. Usaha penangkapan ikan menggunakan gillnet di Kota Palembang ternyata masih mendapatkan keuntungan sebesar Rp 1.325.000.000 per tahun dengan R/C rasio sebesar 2,59, sehingga dapat dinyatakan layak usaha. Strategi diperlukan untuk mengembangkan perikanan gillnet yang berkelanjutan di masa mendatang diantaranya adalah efisiensi armada perikanan gillnet, memperluas jangkauan daerah penangkapan ikan, menyediakan sumber permodalan atau akses perbankan, dan peningkatan fasilitas tempat pendaratan., In general, fisheries production in South Sumatra Province fluctuates every year, but in Palembang City, production tends to decrease in recent years. It is suspected that the fishing business in Palembang City is in a state of loss, which will ultimately impact the welfare of the fisher. The purpose of this study was to describe the characteristics of small-scale gillnet fisheries in Palembang City, analyze the financials of small-scale gillnet fisheries in Palembang City, and formulate a management strategy for small-scale gillnet fisheries in Palembang City. The method used in this research is a survey method using a descriptive analysis approach, financial analysis, and SWOT analysis. The results show that the size of the gillnet fleet in Palembang City is quite diverse, namely 16 GT, 17 GT, 18 GT, 20 GT, 25 GT, 27 GT, 28 GT and 29 GT. The profit-sharing system applied by gillnet fisher in Palembang City is 50: 50, for owners to receive 50% while for skippers and crew members receive 50%. The fishing business using gillnets in the city of Palembang is still getting a profit of Rp. 1,325,000,000 per year with an R/C ratio of 2.59, so the business is feasible. Then, several strategies are needed to develop sustainable gillnet fisheries in the future, including gillnet fisheries’ efficiency, expanding fishing ground, providing sources of capital or banking access, and improving landing site facilities.
Keyword: fishery business, gillnet, management strategy, Palembang, small scale

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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