Judul: Strategi Peningkatan Implementasi Penggunaan Liquefied Petroleum Gas sebagai Bahan Bakar Mesin Perahu di Kabupaten Sukabumi
Abstrak: Upaya mengurangi penggunaan bahan bakar minyak salah satunya melalui kebijakan diversifikasi energi. Kebijakan diversifikasi energi pada bidang perikanan berupa penyediaan dan pendistribusian Liquefied Petroleum Gas (LPG) untuk kapal perikanan skala kecil. Kebijakan tersebut dilaksanakan melalui program konversi BBM ke LPG bagi nelayan yang diawali dengan memberikan bantuan berupa paket konverter kit kepada nelayan yang mempunyai perahu < 5 GT. Beberapa daerah di Indonesia yang menjadi target sasaran program konversi BBM ke BBG bagi nelayan pada tahun 2016 sebanyak 10 lokasi dengan jumlah 5.473 paket dan pada tahun 2017 sebanyak 28 lokasi dengan jumlah 17.081 paket. Salah satu daerah di Jawa Barat yang mendapatkan bantuan paket konventer kit bagi nelayan adalah Kabupaten Sukabumi yaitu sebanyak 1424 unit. Namun sejak program tersebut diimplementasikan nelayan di Kabupaten Sukabumi tetap menggunakan BBM sebagai bahan bakar mesin perahunya. Hal tersebut mengindikasikan bahwa implementasi penggunaan LPG sebagai bahan bakar mesin perahu belum terlaksana secara optimal. Tujuan penelitian ini adalah untuk merumuskan dan merekomendasikan strategi peningkatan implementasi penggunaan LPG di Kabupaten Sukabumi dengan mengidentifikasi persepsi nelayan terhadap penggunaan LPG sebagai bahan bakar mesin perahu dan melakukan kajian pada beberapa faktor internal eksternal yang mempengaruhinya. Metode yang digunakan dalam rangka mencapai tujuan tersebut adalah (1) skala likert untuk menilai persepsi nelayan terhadap penggunaan LPG sebagai bahan bakar pada mesin perahu; (2) analisis IFE dan EFE untuk mengkaji faktorfaktor internal dan eksternal yang menjadi kunci dalam implementasi penggunaan LPG sebagai bahan bakar dan (3) analisis SWOT merumuskan alternatif-alternatif strategi peningkatan implementasi penggunaan LPG sebagai bahan bakar pada mesin perahu oleh Dinas Kelautan dan Perikanan Kabupaten Sukabumi. Hasil penelitian menunjukan bahwa persepsi nelayan terhadap penggunaan LPG sebagai bahan bakar pada mesin perahu termasuk kategori sedang, sehingga perlu ditingkatkan. Berdasarkan kajian faktor internal dan eksternal maka strategi peningkatan penggunaan LPG sebagai bahan bakar pada mesin perahu yang dapat dilakukan oleh Dinas Kelautan dan Perikanan Kabupaten Sukabumi yang dirumuskan melalui analisis SWOT antar lain : Meningkatkan efektifitas program sebagai sarana edukasi mengenai energi alternatif yang menguntungkan dan penerapan teknologi penangkapan yang ramah lingkungan, penyusunan peraturan daerah yang mendukung penggunaan LPG sebagai bahan bakar alternatif, peningkatan pemberdayaan nelayan, optimalisasi penggunaan konverter kit dengan menyediakan layanan purnajual, pendampingan secara berkala, dan menambah alokasi anggaran untuk kegiatan pemberdayaan. .
Keyword: kebijakan diversifikasi, konversi BBM ke LPG, persepsi, strategi

Judul: Liquefied Petroleum Gas Performance on 6,5 HP Engine as an Alternative Fuel in Small Motorized Fishing Boat.
Abstrak: Fuel is the main commodity for fisherman who owns a motor boat to run the fishing venture. Fuel expenditure at this time became traditional fishermen problem that burden the operational cost of catching fish for the most part of the total cost to be spent and high operational cost for fishing activity, is the reason why fishermen are reluctant to sail. Therefore, reducing the fuel consumption by using Liquefied Petroleum Gas (LPG) as an alternative fuel on small motor boat can reduce daily operational cost. Converting the fishing boat from using sail and paddle to engine as the powertrain has benefited fishermen in time, effort and fishing ground scope. On the other hand dependency on subsidized fuel is very fundamental for them. Therefore, on the year 2006 the Indonesian government issued the President Decree no. 5 as a policy to develop alternative fuel so that the fishermen can reduce the subsidized fuel expenditure cost by switching to LPG which as a cheaper price on their engine boat. LPG is an unrenewable energy resource which derived from liquefied earth oil and one of the fuel that has the potential to replace or reduce the use of susidized fuel as it has been stated by some studies on LPG which can be used on land vehicles such as motorcycles, cars and watercraft such as traditional fishing boats that is using fuel and diesel motor. This can be done because the octane number of LPG is 120, this octane number is equivalent to fuel. The scope of this research was to analyze the technical and cost aspects. In terms of technical aspect was comparing the performance of LPG and fuel in the engine which was used as experiment object. The comparison was to found out how the fuel consumption and the engine and exhaust temperature difference when the engine run on LPG and fuel. Further analysis was about the cost of covering the operational costs in order to be considered for fishermen to use LPG as an alternative fuel. The objectives of this work were to analyze the technical effect of LPG compared to the fuel on 6,5 HP engine by measuring the engine and exhaust temperature and to calculate the fuel saving for a single trip by measuring measuring the specific fuel consumption, and to explicate the cost benefit from the use of LPG compared to the gasoline for fishing activity. During the experimental test, the engine speed was maintained at idling conditions of 1600, 2000, and 2500 rotation/minute throughout the experiment. In each rotation, time required by the engine to consume 50 cc of fuel and 200 gr of LPG was noted in three repetition. Similiarly for recording the engine and exhaust temperature. All collected data were collected in two phases. The engine and exhaust temperature were collected in the laboratory of Fishing Technology Development Center (BBPPI) Semarang. Fuel consumption test were performed in laboratory iv and experimental fishing trip from Tambaklorok fishing port to the fishing ground where the fisherman usually catch fish. Result showed the engine and exhaust temperature decrease when
Keyword: Bogor Agricultural University (IPB)

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