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: Negative Association Rule untuk Melihat Pola Keterkaitan Perilaku Konsumen pada Data Transaksi Pembelian
Abstrak: Association rule mining is one of the most popular data mining techniques to find associations among items in a set by mining necessary patterns in a large database. Typical association rules consider only items enumerated in transactions. Such rules are referred to as positive association rules. Negative association rules also consider the same items, but in addition consider negated items or absent from transactions. The behavior of the customers is studied with reference to buying different products in a shopping store, the discovery of interesting patterns in this collection of data can lead to important marketing and management strategic decisions. Negative association rules are useful in market-basket analysis to identify products that conflict with each other or products that complement each other, in devising marketing strategies. This study used the combinations of minimum support of 10%, 30%, 50% and 70% and minimum confidence 10%, 30%, 50%, and 70%, also minimum interest 0.01, 0.001, 0.0001, and 0.00001. The result shows that the highest value is established by the occurence of rules if customers buy soap then customers will not buy soft drinks and otherwise if a customer buys a soft drink, the customer will not buy soap. Both rules have an interesting value 0.02012.
Keyword: purchasing transaction data., Negative association rule

Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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