Judul: Perilaku komunikasi dan jaringan komunikasi peternak domba tentang sapta usaha peternakan (kasus pada peternak domba di desa Cigudeg, kecamatan Cigudeg, kabupaten Bogor)
Abstrak: The aim of research were to : (1) describe individual characteristic of sheep farmers in Cigudeg Village, (2) describe sheep farmers communication behaviour regard to seven efforts of animal husbandry (SUP) in Cigudeg Village, (3) describe communication roles regard to SUP which occured in their communication network, and (4)analyze correlation between their individual characteristics and communication role, their communication behaviour and communication role regard to SUP which occured in their communication network.
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Judul: Hubungan aktivitas komunikasi dengan perilaku peternak dalam upaya meningkatkan produktivitas usaha ternak domba (kasus peternak domba di desa Cigudeg, kecamatan Cigudeg, kabupaten Bogor)
Abstrak: The aim of this research were: (1) to identified the caracteristics of sheep farmer's in Cigudeg village, Bogor; (2) to described the communication activities of the sheep farmers; (3) to described the sheep farmer's behaviour in increasing farm productivities; (4) to analyzed the corelation between characteristics and sheep farmer's behaviour in increasing sheep farm productivities, and (5) to analyzed the correlation between communication activities and sheep farmer's in increasing sheep farm productivities. This research conducted on March 2007.
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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