Judul: Analysis Of Delayed Material Based On Data Warehouse And C5.0 Decision Tree Algorythm Approach.
Abstrak: Dalam aktivitas bisnis yang selalu dinamis, para pelakunya harus senantiasa memikirkan strategi dan inovasi dari kualitas produk agar dapat mengembangkan skala bisnis mereka. Salah satu upaya dalam memenuhi kebutuhan bisnis tersebut adalah dengan melakukan analisis terhadap kegiatan pembelian bahan baku yang dibutuhkan oleh perusahaan terkait produksi. Semakin cepat pemenuhan kebutuhan tersebut, maka perusahaan dapat memaksimalkan segala aktivitas yang berhubungan dengan proses produksi. Salah satu permasalahan penting terkait kegiatan pembelian barang adalah kegiatan keterlambatan penerimaan barang dari vendor kepada perusahaan yang melakukan pembelian. Dengan berdasarkan latar belakang permasalahan yang dihadapi oleh PT AKPI Tbk maka penelitian ini bertujuan untuk melakukan pembangunan data warehouse dan OLAP untuk menyajikan informasi pembelian barang dan bahan baku secara multidimensi., Business activities are always dynamic, that is why a company has to constantly think about strategies and innovation in order to develop their business scale. By utilizing information technology, the process of data analysis and information to determine policies can be implemented properly to reach corporate strategy. Most case of late delivery by the vendor can resulted in production activities become stunted due to lack of material available. The solution to this problem is to perform data analysis using the factors related to the purchase of goods and materials. Based on the background of the problems, this study aims to do the development of data warehouse and OLAP for presenting information purchase of goods and raw materials in multidimensional.
Keyword: classification model, data warehouse, decision tree

Judul: Pengembangan data warehouse pengiriman barang di PT Geologistics
Abstrak: PT Geologistics adalah sebuah perusahaan pengiriman barang. Data pengiriman barang terus bertambah setiap hari dan membentuk tumpukan atau gunungan data. Untuk mengintegrasikan data dari berbagai departemen pada PT Geologistic dibutuhkan data warehouse. Pada data warehouse dapat dilakukan berbagai operasi On-line Analytical Processing (OLAP) untuk memenuhi kebutuhan pengolahan data dari setiap divisi. Tujuan penelitian ini untuk membuat data warehouse dan operasi OLAP pada data pengiriman barang PT Geologistics. Ruang lingkup penelitian ini dibatasi pada data pengiriman barang dari bulan Oktober 2005 sampai dengan juni 2006. Sebelum data warehouse dibangun, data harus melewati proses ekstraksi, pembersihan, transformasi, pemuatan, dan refresh. Data warehouse dibangun menggunakan arsitektur tiga tingkat data warehouse, yaitu server basis data warehouse, server OLAP, dan perangkat analisis untuk pengguna.
Keyword: 

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