Judul: Peramalan permintaan ayam di PT. Sierad Produce tbk.
Abstrak: Penelitian ini bertujuan untuk mendapatkan metode peramalan kuantitatif alternatif terakurat untuk meramalkan permintaan daging ayam dan mendapatkan ramalan permintaan daging ayam untuk satu tahun yang akan datang di PT. Sierad Produce Tbk. Metode yang digunakan dalam penelitian ini adalah metode peramalan kuantitatif. Prinsip dasar metode peramalan kuantitatif adalah cara memperkirakan yang mungkin akan terjadi pada masa yang akan datang, berdasarkan data kuantitatif pada masa lalu dengan metode yang sistematis, dengan demikian peramalan tersebut bersifat objektif. Metode kuantitatif yang diterapkan terdiri atas metode time series dan metode kausal (regresi). Data yang digunakan adalah data kuantitatif yang berasal dari data mingguan permintaan dan harga daging ayam yang dimiliki PT. Sierad Produce Tbk mulai minggu pertama bulan Januari 2001 sampai minggu ke empat bulan Mei 2003 (atau dalam rentang waktu dua tahun lima bulan) dalam satuan kilogram dan rupiah.
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Judul: Peramalan penjualan daging ayam di RPA Jabal Nur, Kabupaten Ciamis, Jawa Barat
Abstrak: Penelitian ini bertujuan menggambarkan kondisi bisnis eksternal dan internal perusahaan, menganalisis pola data penjualan daging ayam RPA Jabal Nur, memilih metode peramalan terakurat, dan mendapatkan ramalan penjualan daging ayam RPA Jabal Nur untuk tahun 2005 beserta implikasinya bagi perusahaan. Metode yang dicoba dalam penelitian ini adalah metode time series dan metode kausal (model regresi)...
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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