Judul: Kajian produk domestik bruto tanaman bahan makanan melalui model vector autoregression
Abstrak: Produk Domestik Bruto (PDB) merupakan salah satu indikator untuk mengukur kinerja para pelaku usaha di sektor pertanian. PDB sektor pertanian sangat dipengaruhi oleh PDB sub sektor tanaman bahan makanan sehingga perhitungan PDB sektor pertanian dapat didekati dengan menghitung nilai produksi komoditas utama tanaman bahan makanan yaitu padi dan jagung.
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Judul: Identifikasi Faktor-faktor yang Mempengaruhi Tingkat Pertumbuhan PDB Pertanian Tanaman Pangan Serta Perannya dalam Perekonomian
Abstrak: Salah satu sub sektor yang penting dalam sektor pertanian adalah pertanian tanaman pangan atau tanaman bahan makanan. Pertanian ini menjadi penting bagi bangsa Indonesia karena langsung berkaitan dengan stabilitas perekonomian nasional, kehidupan sebagian besar masyarakat dan memiliki kontribusi yang besar terhadap perekonomian. Dengan berbagai peran yang strategis dalam perekonomian tersebut, pertanian tanaman pangan harus terus diperhatikan perkembangannya dan ditingkatkan laju pertumbuhannya. Perkembangan tersebut dapat diketahui melalui gambaran umum pertanian tanaman pangan.di Indonesia secara rinci. Sedangkan untuk menetapkan strategi pembangunan dalam pencapaian laju pertumbuhan yang tinggi, perlu diketahui pula faktor-faktor yang berpengaruh terhadap pertumbuhan output pertanian tanaman pangan.
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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