Judul: Pengaruh Pengelolaan Usahatani Terhadap Aliran Permukaan, Sedimen dan Pendapatan Usahatani di DAS Mikro Cibugel Jawa Barat.
Abstrak: Pengelolaan usahatani yang dilakuakan dalam suatu DAS sangat berpengaruh terhadap konservasi tanah dan air. Pengelolaan usahatani yang baik ditandai dengan rendahnya aliran permukaan, erosi dan kehilangan unsur hara serta tingginya hasil dan pendapatan petani. Untuk mengetahui pengelolaan usahatani yang dilakukan dalam suatu DAS, maka perlu dipelajari pengaruh penglolaan usahatani dan kemiringan lahan pada berbagai periode pertumbuhan vegetasi terhadap aliran permukaan, sedimen, unsur hara dan pendapatan usahatani.
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Judul: Analisis pendapatan dan modal usahatani konservasi lahan kering : Kasus Mikro DAS Desa Selopamioro Kecamatan Imogiri dan Desa Srimartani Kecamatan Piyungan Kabupaten Bantul
Abstrak: Pemanfaatan dan pengelolaan lahan kering bagi kegiat- an pertanian di samping ditujukan untuk meningkatkan produksi serta hasil, harus pula memperhatikan kaidah- kaidah konservasi tanah dan air secara tepat dan memadai. Peningkatan dan Stabilisasi Mikro DAS yang berorientasi jangka panjang, dalam jangka pendek manfaatnya belum dinikmati oleh peserta Mikro DAS. Hal ini sering menim- bulkan masalah dalam pengembangan usahatani di lahan kering. Penelitian ini ditujukan untuk mengetahui sejauh mana modal petani dialokasikan bagi usahatani konservasi, mengetahui proporsi pendapatan dari usahatani konservasi terhadap pendapatan keluarga petani serta mengetahui hambatan dalam pengembangan usahatani konservasi. Analisis pendapatan usahatani menggunakan metode Return to Total Capital dan disajikan dalam bentuk tabula- si serta dilengkapi analisis kualitatif observatif. Data primer terdiri dari 32 responden petani pemilik yang sekaligus menggarap lahan Mikro DAS miliknya. Pendapatan dan belanja konsumtif keluarga petani Mikro DAS Desa Selopamioro per tahunnya. Rp 2.259….
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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