Judul: Prospek pengembangan usaha peternakan sapi potong di kecamatan Bawang kabupaten Banjarnegara
Abstrak: The objectives this research are : 1) to identify internal and external factors which can influences development of beef cattle business in Sub-District Bawang, Banjarnegara and 2) to formulate the alternative development strategy of beef cattke business in Sub-District Bawang, Banjarnegara. Primary data obtained by direct interview with the farmers, used questionaire as the tool. Secondary data obtained from relevant institutions sources which related the topic of research.
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Judul: Prospek pengembangan usaha peternakan sapi potong di Kecamatan Surade Kabupaten Sukabumi
Abstrak: The objective of the research were 1) to identification internal and ekstemal factors which can influences beef cattle farming development in Surade Sub-District, 2) to formulate the strategy of beef cattle development in Surade Sub-District. Primary data obtained by direct interview with the beef cattle farmer, used questionaue as the tool. Secondary data obtained from relevant institutions sources that related with the topic of the research, the data analyzed descriptive quantitative method. The result of feseability study analysis showed Net Present Value (NPV) equal to Rp. 5,670,144,68, Benefit Cost Ratio (BCR) equal to 1.52, Interest Rate Ratio (IRR) equal to 22% and Pay Back Period (PBP) equal to 4 year. The return cost ratio (RiC ratio) of beef cattle farm business analysis, showed that ratio as 1.70 value. It means that the beef cattle farm business were profitable with earning equal to Rp. 2,286,006,94. Base on data feseability study analyzed showed beef cattle development in Surade Sub-District were feseable. Result of analysis of SWOT in the form of strategy S-0 that is cooperation with financial institution to increase working capital, cooperation with government institution to introduce artificial insemination technology. Strategy of W-0 that is re-activated farmer group in marketing beef cattle product, more recruit farmer adviser to increase farmer knowledge in beef cattle farming. Strategy S-T that is to increase farmer knowledge in animal health, to increase animal productivity by applicated advance breeding technology. Strategy W-T that is to increase farmer personal skill in beef cattle farming, it can be implemented by coopemtion between farmer group and government intsitution.
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Judul: Sulfonated Polystyrene-Nafion Composite Gel Polymer Electrolyte for Dye Sensitized Solar Cells Application with Synthetic Dyes
Abstrak: Dye Sensitized Solar Cell (DSSC) merupakan sel surya generasi ketiga dengan kelebihan mudah difabrikasi, biaya produksinya rendah, ramah lingkungan, serta menghasilkan efisiensi konversi daya yang cukup baik. Sistem DSSC tersusun atas elektrode kerja, zat warna, elektrolit, dan elektrode lawan. Elektrolit yang umum digunakan dalam aplikasi DSSC adalah elektrolit cair yang mengandung iodida/triiodida (I-/I3-). Elektrolit cair memiliki kelemahan mudah menguap, sehingga mengakibatkan kinerja DSSC menjadi menurun. Penelitian ini bertujuan memodifikasi elektrolit cair menjadi gel polimer elektrolit komposit polistirena tersulfonasi-nafion serta membandingkan nilai efisiensi dari penggunaan zat warna merah dan kuning sebagai zat pemeka DSSC. Komposit polistirena tersulfonasi-nafion dibuat dengan lima variasi komposisi 0,00:1,00; 0,25:0,75; 0,50:0.50; 0,75;0,25; 1,00: 0,00. Hasil pengukuran menunjukkan komposisi optimum komposit polistirena tersulfonasi-nafion adalah 0,50:0,50 dengan nilai efisiensi 1,50% untuk zat warna merah dan 1,35% untuk zat warna kuning., Dye Sensitized Solar Cell (DSSC) is a third generation solar cell with the advantages of being fabricated, low production costs, environmentally friendly, and producing a fairly good power conversion efficiency. The DSSC system consists of a working electrode, dyes, electrolyte, and counter electrode. The electrolyte commonly used in DSSC applications is liquid electrolyte containing iodide/triiodide (I-/I3-). The electrolyte has the weakness of being volatile, which causes the performance of the DSSC to decrease. This study aims to modify the liquid electrolyte into a gel polymer electrolyte composite PSS-nafion and compare the efficiency values of red and yellow dyes as DSSC sensitizers. Sulfonated polystirene-nafion composite was made with five composition variations 0,00:1,00; 0,25:0,75; 0,50:0,50; 0,75;0,25; 1,00: 0,00. The measurement results show that the optimal composite composition of PSS-nafion is 0,50:0,50 with an efficiency value of 1,50% for red dyes and 1,35% for yellow dyes.
Keyword: dye sensitized solar cell, dyes, gel polymer electrolyte, nafion, sulfonated solystirene