Judul: Feasibility Study and the Development Strategy of Nil Tilapia Farmer Groups in Gemah Parahiyangan Karawang District
Abstrak: Recently nil tilapia (Oreochromisniloticus) cultures are being practiced in floating net cages, brackish water ponds and running water ponds. Rapid development of nil tilapia culture area in Bekasi, Karawang and Purwakarta Districts required a lot of nil tilapia fries. In parallel, nil tilapia hatcheries are developed in many areas, especially the small scale hatcheries. Nil tilapia hatcheries are very profitable due to the low capital, simple technology and relatively short time culture period. Nil tilapia culturists are grouped at least into 3 segments, namely (i) breeding farmers, (ii) first nursery farmers and (iii) secondary nursery farmers. Breeding farmers, first nursery farmers and secondary nursery farmers produce 1,5-1,7 cm, 2-4 cm and 5-7 cm fries, respectively. The objectives of the study are (i) to identify the internal and external factors of the nil tilapia farmer groups, (ii) to examine the economic feasibility of nil tilapia farmer groups, and (iii) to look for alternative development strategic for nil tilapia nil tilapia farmer groups. Required data and information are collected by interviewing nil tilapia breeder and farmers which are the members of Gemah Parahiyangan (GP) nil tilapia farmer groups. Data are analyzed using simple economics analysis such as net Benefit Cost Ratio (BC ratio), Pay Back Period (PBP), Net Present Value (NPV), Internal Rate of Return (IRR) and Break Even Point (BEP). Development strategic is analyzed using Strengths, Weaknesses, Opportunities, Threats (SWOT) Analysis. The results showed that (i) Discount Factor is 20% per year, (ii) BC ratio is 1,06, (iii) PBP is 338,4 days (11 months and 8,4 days) or equals to 4 cycles, (iv) NPV is Rp 1.950.102, (iv) IRR is 29,67%, and (v) BEP is 145.840 fries per cycle at selling price of Rp 63,00 per fry. Based on the analyzed data, it can be said that the nil tilapia farmer groups are profitable. SWOT Analysis suggested that best development strategic is (i) to establish collaboration work with fish feed industry, (ii) to extend the pond areas and (iii) to develop efficient nil tilapia production system. In the future, there should be a program on fisheries human resources capacity development especially on the nil tilapia farmer groups. In order to increase the aquaculture productivity, the government through District Fisheries Services should play a role to motivate, to escort and to train the fish farmers.
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Judul: Financial Feasibility Analysis of Gouramy (Osphronemus gouramy) Hatchery in Parakanhonje, Indihiang District, Tasikmalaya City
Abstrak: Ikan gurami (Osphronemus gouramy) merupakan ikan domestik yang memiliki peluang pasar yang besar dalam perdagangan ikan air tawar nasional. Produksi ikan gurami tahun 2018-2019 mengalami peningkatan sebesar 31,62%. Tetapi peningkatan produksi tersebut belum mampu mencapai target. Tingkat produksi sangat dipengaruhi oleh ketersediaan benih yang tinggi. Upaya yang dilakukan untuk meningkatkan produksi benih yang dihasilkan dapat dilakukan melalui perbaikan teknik pembenihan yang didukung dengan peningkatan fasilitas dan sarana produksi yang memadai. Namun perlu adanya analisis kelayakan finansial usaha untuk mengetahui kelayakan usaha dan pengembangannya. Penelitian ini bertujuan menganalisis kelayakan finansial budidaya pembenihan ikan gurami. Analisis data yang digunakan berupa analisis deskriftif untuk menganalisis aspek teknis budidaya dan aspek finansial yang dianalisis secara kuantitatif. Perbaikan teknik budidaya di lokasi penelitian yaitu dilakukan penambahan fasilitas dan sarana produksi yang memadai. Proses pemijahan yang dapat diatur menjadi beberapa set induk, dengan rasio antara induk jantan dan betina pada setiap setnya yaitu 1 : 4. Proses pendederan dapat diperbaiki berdasarkan standar yang ditentukan. Berdasarkan analisis finansial pada kondisi sebelum pengembangan dan kondisi sesudah pengembangan dinilai layak untuk dijalankan. Analisis kriteria investasi pada kondisi pengembangan menghasilkan NPV sebesar Rp 233.976.978, net B/C ratio sebesar 4,20 , PP sebesar 3,11 tahun , dan IRR sebesar 53,95%., Gouramy (Osphronemus gouramy) is a domestic fish that has a large market opportunity in the national freshwater fish trade. The production of gouramy in 2018-2019 has increased by 31.62%. However, the increase in production has not been able to reach the target. The level of production is strongly influenced by the high availability of seeds. Efforts are made to increase the production of seeds produced can be carried out through improved hatchery techniques supported by an increase in adequate production installations and facilities. However, there is a need for a business financial feasibility analysis to determine the feasibility of a business and its development. This study aims to analyze the financial feasibility of gouramy hatchery cultivation. The data analysis used was descriptive analysis to analyze the technical aspects of cultivation and the financial aspects which were analyzed quantitatively. Improvement of cultivation techniques at the research location was the addition of adequate production installations and facilities. The spawning process can be arranged into several sets of broodstock, with the ratio between male and female in each set, which is 1: 4. The nursery process can be improved based on the specified standards. Based on a financial analysis of the before development conditions and after development conditions, it is considered feasible to run. Analysis of investment criteria under development conditions resulted in an NPV of IDR 233.976.978, a net B / C ratio of 4.20, a PP of 3.11 years, and an IRR of 53.95%.
Keyword: Financial feasibility analysis, gourami, hatchery, nursery

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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