Judul: Keragaan Kapal Tuna Longline Samudera Jaya Sebelum dan Setelah Kenaikan Harga BBM di PPN Palabuhanratu
Abstrak: One of the prime commodities from Palabuhanratu national fishing port is tuna. Fishermen in Palabuhanratu often use tuna longline as fishing gear to catch tuna. In tuna longline fisheries, the fishermen need a large number of investment and fuel for tuna longliner. During 2007 – 2011 period, fuel price increased in 2008. The rising fuel price has negative effects on daily life. This research has purposes to know the decreasing number of tuna longliners, tuna longlines and the fishermen during 2007 – 2011 and to analyze the performance of tuna longliner by using feasible analysis. All primary data is derived from questionnaire and interview and secondary data is derived from literature study. The result of this research were the number of tuna longline fishermen and tuna longliners which were based on PPN Palabuhanratu decreased by 2,35% and 2,55% per year. But, the number of tuna longlines increased 31,12% per year. Based on feasible analysis of tuna longliner named Samudera Jaya, IRR rate was 20%, Net B/C ratio was 2,47, and the NPV was Rp 486.927.481. It can be showed that tuna longline was still feasible and worth in fisheries business.
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Judul: Productivity and Business Feasibility of Fisheries Longline Tuna at the Palabuhanratu Fishing Port, Sukabumi
Abstrak: Terjadi penurunan jumlah armada rawai tuna yang beralih menjadi armada pancing ulur di PPN Palabuhanratu, hal ini tentu akan mempengaruhi keberlanjutan usaha perikanan rawai tuna di PPN Pelabuhanratu, perlunya perhitungan kelayakan usaha demi keberlangsungan usaha perikanan tuna di PPN Palabuhanratu. Penelitian bertujuan untuk menghitung nilai produktivitas dan kelayakan usaha rawai tuna di PPN Palabuhanratu. Sampel yang digunakan dalam penelitian ini adalah armada rawai tuna 30, 40, dan 80 GT yang masing-masing mewakili setiap kelompok ukuran armada rawai tuna di PPN Palabuhanratu yaitu 20-30 GT, 31-50 GT, dan 51-100 GT dengan masing-masing satu armada sebagai perbandingan. Perhitungan produktivitas dan kelayakan usaha digunakan sebagai indikator dalam mempertimbangkan keberlanjutan usaha perikanan rawai tuna. Metode menggunakan pendekatan perhitungan produktivitas, keuntungan (), R/C (Revenue per Cost Ratio), Payback Period, ROI (Return of Investment), dan BEP (Break Event Point). Hasil penelitian menunjukan, produktivitas armada rawai tuna tertinggi adalah armada 80 GT dengan nilai produktivitas trip 45.303,33 kg/trip/tahun, produktivitas kapal 1,698875 ton/GT/tahun, dan produktivitas nelayan 10.454,62 kg/orang/tahun. Produktivitas terendah adalah armada 40 GT dengan nilai produktivitas trip 7.026,25 kg/trip/tahun, produktivitas kapal 0,702625 ton/GT/tahun, dan produktivitas nelayan 2.555 kg/orang/tahun. Berdasarkan hasil perhitungan kelayakan usaha maka diketahui armada rawai tuna 30 dan 80 GT mengalami keuntungan dan memiliki masa payback period yang cepat dibawah 5 tahun dengan niali R/C Ratio > 1 dan ROI bernilai positif. Armada rawai 40 GT mengalami kerugian sehingga memiliki nilai R/C Ratio < 1 dan ROI bernilai negatif sehingga payback period tidak dapat dicapai., Happen decline number of switching tuna longline fleets become a tuna handline fleets in the Palabuhanratu Fishing Port, this will influence continuity business fishery longline tuna at Pelabuhanratu Fishing Port, the need appropriateness effort for continuity business tuna fishery in Palabuhanratu Fishing Port. Research aims to calculate mark productivity and feasibility business tuna longline at Palabuhanratu Fishing Port. The samples used in this study were 30, 40, and 80 GT tuna longline fleets, each representing every group the size of the tuna longline fleet in the Palabuhanratu Fishing Port namely 20-30 GT, 31-50 GT, and 51-100 GT with 1 fleet each as comparison. Productivity and feasibility business used as indicators in analyzing continuity business fishery tuna longline. method of using productivity, profit ( ), R/C (Revenue per Cost Ratio ), Payback Period, ROI ( Return of Investment ), and BEP ( Break Event Point ). The results showed that the productivity of the tuna longline fleet was the highest is an 80 GT fleet with value productivity of trip 45,303.33 kg/trip/ year, productivity of ships 1.698875 tons/GT/ year, and productivity of fishermen 10,454.62 kg/person/year. Productivity Lowest is a 40 GT fleet with value productivity of trip 7,026.25 kg/trip/year, productivity of ships 0.702625 tons/GT/year, and productivity of fishermen 2.555 kg/person/year. based on results analysis appropriateness the eating business is known to have a tuna longline fleet of 30 and 80 GT have values experience profits and has a fast payback period under 5 years with an R/C Ratio value of > 1 and a valuable ROI positive. The 40 GT longline fleet suffered loss so that own R/C Ratio value < 1 and
Keyword: GT, kelayakan usaha, produktivitas, rawai tuna, tuna, business, feasibility, GT, longline tuna, productivity, tuna

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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