Judul: Analisis produksi dan daya saing usaha penggemukan sapi potong di Kabupaten Agam Provinsi Sumatera Barat
Abstrak: The domestic beef cattle producers have supplied only 70 percent of the national need. Demand of the beef cattle has not been accompanied by an increased supply response. One of the major problems in beef cattle fattening is its low productivity that might be caused by its low efficiency of input use. On the other side low productivity also caused an increase in the number of imported beef cattle. Therefore, this study aims to analyze : (1) factors that influence the production of beef cattle fattening, (2) the level of technical efficiency of beef cattle fattening, (3) beef cattle fattening competitiveness, and (4) the impact of government’s input-output policy on the competitiveness of beef cattle fattening in Agam district. The stochastic production frontier is used to estimate production function, while Policy Analysis Matrix was employed in this study to measure level of competitive and comparative advantage and effect of government interventions on beef cattle fattening. The results showed that quantity of forage, concentrate, cattle’s age, and livestock ownership significantly influence production. The average value of the farm technical efficiency is 0.764 ranging from a minimum of 0.478 to a maximum of 0.996. Beef cattle fattening is profitable and has competitive and comparative advantage. Fattening produces profits that create positive incentives for producers and reflect an efficient use of domestic resources.
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Judul: Mode l of beef cattle production system based on local resources in Sumeda ng West Java
Abstrak: Kebijakan pemerintah Provinsi Jawa Barat yang juga dikaitkan dengan pelaksanaan otonomi daerah adalah mengembangkan daerah-daerah berpotensi sebagai sentra produksi sapi potong. Beberapa daerah yang berpotensi dengan prosentase populasi sapi potong dari urutan tertinggi adalah Kabupaten Ciamis (11.33%), Tasikmalaya (10.24%), Sumedang (9.06%), Cianjur (8.93%), Subang (6.46%), da n Purwakarta (6.38%) (Dinas Peternakan Jawa Barat 2010). Kabupaten Sumeda ng ada lah salah satu daerah yang sangat potensial untuk dijadikan sentra pengembangan sapi potong di Jawa Barat. Populasi sapi potong pada tahun 2010 sebesar 32 577 ekor yang terdiri dari 11 618 ekor jantan dan 20 959 ekor betina dan tersebar pada sekitar 14 125 rumah tangga peternak (RTP). Beberapa permasalahan mendasar yang menentukan perkembangan sapi potong di Kabupaten Sumedang, antara lain (a) program pengembangan sapi potong oleh pemerintah belum berhasil optimal, (b) peternak mengalami kesulitan dalam penyediaan pakan ternak sapi terutama pada saat musim kemarau, (c) manajemen budidaya ternak masih tradisional. Penelitian ini bertujuan (a) mengidentifikasi dan menganalisis potensi sumberdaya alam dan sumber daya manusia dalam pengembangan sapi potong, (b) mempe lajari sistem prod uks i berdasarkan pola pemeliharaan, (c) analisis strenght, weakness, opportunity, threats (SWOT) digunakan untuk merumuskan solusi alternatif pemecahan masalah, membuat proyeksi pengembangan, dan menganalisis efisiensi usaha sapi potong. Penelitian ini dilaksanaka n di Kabupaten Sumedang Jawa Barat selama 12 bulan dari bulan Mei 2008 sampai April 2009.
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell