Judul: Analisis Kinerja Rantai Pasok Berkelanjutan untuk Biodiesel Berbasis Minyak Jelantah di Kota Bogor dengan Pendekatan Sistem Dinamis
Abstrak: Biodiesel merupakan salah satu bahan bakar alternatif yang ramah lingkungan. Selain kelapa sawit, biodiesel juga dapat dihasilkan dari minyak jelantah. Sejak tahun 2007, pemerintah Kota Bogor telah memanfaatkan minyak jelantah menjadi biodiesel untuk digunakan sebagai bahan bakar bus Transpakuan. Namun, pada pelaksanaannya, jumlah minyak jelantah yang dipasok tidak pernah mencukupi kebutuhan bahan bakar yang dikonsumsi oleh bus Transpakuan yang berjumlah 30 unit. Tujuan penelitian ini adalah menganalisis ketersediaan minyak jelantah untuk dikonversi menjadi biodiesel dalam jangka waktu 10 tahun mendatang serta memberikan saran kebijakan untuk mendukung program tersebut. Metode yang digunakan adalah sistem dinamis yang dilanjutkan dengan simulasi beberapa skenario yang sudah ditetapkan. Sistem dibagi menjadi tiga sub sistem, yaitu sub sistem pasokan, sub sistem permintaan, dan sub sistem produksi. Hasil penelitian menunjukkan bahwa sistem yang ada saat ini tidak mampu menjamin keberlanjutan rantai pasok minyak jelantah sebagai bahan dasar biodiesel. Dari beberapa skenario yang dicoba dapat disimpulkan bahwa kebutuhan biodiesel akan meningkat seiring dengan tren penggunaan bahan bakar ramah lingkungan yang juga meningkat. Dibutuhkan sistem dan kebijakan baru yang berkaitan dengan rantai pasok biodiesel tersebut. Saran kebijakan yang dapat diusulkan dari penelitian ini adalah meningkatan partisipasi pemasok, merealisasikan program konversi angkutan kota menjadi bus Transpakuan, dan mengawasi pelaksanaan Perda Kota Bogor Nomor 1 Tahun 2014 tentang PPLH.
Keyword: biodiesel, minyak jelantah, rantai pasok, sistem dinamis, Transpakuan

Judul: Model pengelolaan pemanfaatan bahan bakar nabati biodiesel kelapa sawit di Jakarta dan sekitarnya
Abstrak: Research on biodiesel, is still a further study on the technical and economic aspects, while the ongoing research of integrated policy still not exists. Therefore it is necessary to do research on the use of palm oil biodiesel as biofuel that sustainable, especially in the area of Jakarta and its surrounding, such as part of Bogor, Depok, Tangerang and Bekasi .This study, in general aim to build a model of the management of palm oil biodiesel as biosolar in the such area on an ongoing basis. Object of the study limits the fuel distribution line administratively located in the Jakarta area. This research method is done by soft systems approach methodology (SSM), mainly using analytical techniques MDS (Multidimensional scaling), interpretative Structural Modeling (ISM), and AHP (Analytical Hierarchy Process), which supported by other methods such as brainstorming, expert survey (survey of experts) , face validity and policy analysis either hard system approach methodology (HSM), such as the economic feasibility analysis (BEP, B / C Ratio, NPV, IRR and Payback Period) and dynamic system analysis. The results of MDS analysis showed that of the five dimensions of sustainability, only environmental and technological dimensions beyond the sustainability index. While the other three dimensions (social, economic, and policy) have not met the limits of sustainability indexes. In general, the review of utilization of Biodiesel as biofuel from view point of economic is feasible but not sufficiently attracts the investment. At time being the existing regulation are still to be deployed in such manner in order to be workable, especially the local regulatory that in line with such program as shown in the result of policy content analysis result.. ISM analysis results show the structure of influence and interest levels conjunction to achieve the management of sustainable utilization of Biodiesel as biofuel. AHP results indicate that increasing the content of biodiesel is still a priority that must be done to support the management of sustainable utilization of Biodiesel as biofuel in the Jakarta area supported by following the price of raw materials, increasing the role of central government, and ensuring the availability of fuel in the Jakarta area. All analysis results can be developed as BBN model of management of sustainable utilization of palm oil biodiesel in Jakarta and its surrounding
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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