Judul: Program Ekstraksi file-file database
Abstrak: Pengolahan data pada Sistem Database Terdistribusi mempunyai konsep penting yaitu terjalinnya interkoneksi antar database-database lokal yang ada. Ini dapat dilakukan jika ada program aplikasi global yang baik dan dapat menangani berbagai kemungkinan perbedaan format data mengingat adanya otonomi yang wajar pada tiap database lokal. Salah satu bentuk aplikasi global yang dipertimbangkan ialah program aplikasi ekstraksi data. Program EKSTRAK versi 1.0 ialah salah satu alternatif bentuk program aplikasi ekstraksi data yang dapat mengekstrak data dari file-file data berbeda jenis berdasarkan suatu kondisi query yang didefinisikan. Program ini dirancang selain dapat dipakai pada lingkungan komputer pemakai-tunggal (single-user) juga dapat dipakai pada lingkungan banyak-pemakai (multi-user) atau Local Area Network.
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Judul: Perbandingan Alokasi File Sistem Terpusat dan Terdistribusi
Abstrak: Awalnya pada sebuah jaringan. file-file hanya disimpan pada satu server saja, seiring dengan kebutuhan dan perkembangan teknologi maka sekarang file-tile sering disimpan secara terdistribusi. Kekonsistenan dan efisiensi adalah salah satu yang hams diperhatikan pada penyimpanan file secara terdistribusi, dan salah satu cara untuk menangani hal tersebut adalah dengan algoritma alokasi file.
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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