Judul: Role of leading sectors on regional economic growth: a multiregional input-output approach of East Java, Bali, and West Nusa Tenggara
Abstrak: East Java, Bali, and West Nusa Tengga ra Provinces were selected as the locations of this study, which geogr aphically close connected so that economically these provinces are strongl y inter dependent. Based on regional economic theory, an economic growth of a sector in a province will induce not only economic growth in that province but also in the connected provinces. Using Indonesian Multiregional Input-Output, th is study is aiming at analyzing (1) economic structure of East Java, Bali, and West Nusa Tenggara Provinces, (2) production sectors having st rong backward and forward linkage, (3) trade flows between these provinces, and (4) the role of leading se ctors both on intraregional and interregional economic growth.
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Judul: The tendency of regional economic convergence and the role of marine in the Indonesian economy
Abstrak: The purposes of this research were: (1). Acquiring information about economic disparity and estimating the tendency of economic convergence, as well as estimating the determinants for the Indonesian regional economic growth; (2) Analyzing the role of Marine sectors in the regional economy in Indonesia; (3). Analyzing the impacts of both Marine sectors and spatial economic development – through changes in the value of final demands’ components – towards the economy and disparity changes or the tendency of regional economic convergence. The research was focused on Indonesian provincial regions and its main islands, with three analysis approaches, such as Theil’s Index, Panel Data Econometric Model, and Interregional Input-Output (IRIO) Model. The data used were secondary data, comprised of a 1985-2010 Panel Data and a 2005 and 2010 Indonesian IRIO Table. The analysis resulted in the findings that, during the 1985-2010 periods, the Indonesian economic disparities between provinces were considered low with a greater composition of source from within the regions than from among the main islands. The tendency of convergence within both provincial and main-islands economy – during 1985-2010 period – did happen with a slow pace. The model also showed that the tendency of convergence could be accelerated by controlling the economic-growthdetermining variables.The marine sectors had a major role in the Indonesian regional economyas shown by its high degree of linkage and multipliers, as well as its positive marine share role in stimulating growth and the pace of regional economic convergence. From the sectors point of view, the policy of increasing the final demands components from every region would lead to better economic performance, and higher tendency of overall regional economic convergence. Spatially, the aforementioned policy would potentially keep the pace of growth of the national economy. Relatively, focusing the economic activities towards increasing final demands for marine outputs within the Eastern Regions of Indonesia would slow the national economic growth down, but lessen the disparity problem – or increasing the regional economic convergence. Therefore, it would require disparity-lessening or regional-economic-convergenceincreasing policies with an emphasis on the role of marine sectors in Indonesia which could be paired with the efforts of strengthening the interrelation or connectivity that would create both sectoral and spatial economic interdependencies among regions in Indonesia. The commitment of focusing the economic activities towards the Eastern Regions of Indonesia –including the marine sectors – would also require the implementation of an economic-growth-steadying policy.
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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