Judul: Analisis kinerja algoritma cut both ways dan dynamic itemset counting dalam menghitung maximal frequent itemset pada teknik asisiasi
Abstrak: Association Is a technique in data mining used to identify lhe relationship between itemsets in a database (association rule). Some researches In association rule since the Invention d the AIS algorithm In 1993 have yielded several new algorithms. Some of those used artificial datasets (IBM Artificial) and daimed by their authonl to have a reliable performance ln finding maximal frequent ltemset (MFI). But these datasets have different dlaracteriStic from the real wot1d dataset (retail data8ets). The goal d this research Is to evaluate the performance d Dynamic Hemset Counting (DIC) and Cut Both Ways (CBW) ln finding MFI on retail dataset using Apriori as a third party algorittvn. There are 5 datasets used In 1his research which have different number of items and records. We used sman and large values d minimum support (mlnsupp) thresholds as a treatment for each algorithm and dataset, whim are: 0.02%, 0.04%, 0.06%, 0.08%, and 0.10% for
Keyword: data mining, algoritma, Association rule, gugus data

Judul: Pembentukan Minimal Non-Redundant Association Rules Menggunakan Frequent Closed Itemsets pada Data Transaksi Swalayan
Abstrak: Teknik association rules mining di dalam data mining seringkali menghasilkan aturan asosiasi dalam jumlah banyak yang dapat mengandung aturan-aturan yang berulang, yaitu aturan-aturan yang memberikan informasi yang sama. Penelitian ini menggunakan teknik mining minimal non-redundant association rules untuk menghasilkan aturan asosiasi yang tidak berulang pada data transaksi pembelian barang di Sinar Mart Swalayan selama 2 bulan (1 Maret 2004 – 21 Mei 2004). Konsep closure dalam Galois connection diterapkan dalam teknik minimal non-redundant association rules mining untuk membentuk generators dan frequent closed itemsets menggunakan algoritma Close. Pada penelitian ini dilakukan pembentukan generators dan frequent closed itemsets dengan menggunakan empat nilai minimum support, yaitu 5 %, 2 %, 1 %, dan 0,5 % dari 23.631 transaksi yang ada. Berdasarkan generators dan frequent closed itemsets, dibentuk minimal non-redundant association rules menggunakan 11 nilai minimum confidence, yaitu 75 %, 70 %, 65 %, 60 %, 55 %, 50 %, 45 %, 40 %, 30 %, 20 %, dan 10 %.
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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