Judul: Membangun Sistem Inferensi Fuzzy Berdasarkan Fuzzy Subtractive Clutering untuk Kasus Pelanggan Telepon
Abstrak: Pelanggan bisnis di PT. Telkom Bogor merupakan pelanggan yang potensial, karena memiliki kontribusi yang sangat besar bagi perusahaan. Ratarata 80% pendapatan perusahaan berasal dari pelanggan bisnis. Oleh karena itu diperlukan kemampuan untuk mengidentifikasi pelanggan, agar produk-produk yang dikeluarkan oleh PT. Telkom dapat memenuhi keinginan pelanggannya. Sistem yang digunakan pada penelitian ini adalah sistem inferensi fuzzy (FIS) berdasarkan fuzzy subtractive clustering (FSC). FSC menghasilkan deretan pusat cluster, nilai derajat keanggotaan dan sejumlah cluster yang dapat menjadi informasi untuk membangun FIS. Cluster yang terbentuk dari hasil FSC dilakukan uji validitasnya dengan metode kekompakan dan pemisahan (compactness and separated). Sehingga cluster yang diambil untuk membangun FIS adalah cluster yang terbaik. Selanjutnya untuk melihat tingkat kesalahan hasil output FIS dilakukan tes dengan metode root mean square error (rmse). Berdasarkan hasil FSC dan uji validitas yang dilakukan cluster yang valid pada kecamatan di Kota Bogor adalah yang memiliki dua, tiga dan empat cluster. Nilai output FIS yang didapat menunjukan perbedaan yang tidak jauh dengan output sebenarnya, terbukti dengan hasil rmse yang kecil disetiap kecamatan di Kota Bogor.
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Judul: Karakterisasi Pelanggan PLN Menggunakan Algoritma Fuzzy C Mean
Abstrak: Based on the technology point of view, CRM is a system tool in analyzing customers’ behavior based on customer histories data. One of the important tasks of CRM is identifying PLN customers’ behavior based on their behavior in using electricity. Customer identification is done by segmenting customers. In this research, the customer that will be segmented are home, business and industrial customer. The variable that used as a attribute in segmentation process are the duration of subscribing, total payment, discipline in paying and total electric usage. The system that developed in this research provided many choice of variable combination to be segmented. The goal is to provide many choice for PLN in segmenting customer. The method used for segmenting customer is fuzzy c-mean algorithm. To measure the segmentation accuration, the result of the clustering is validated by the Xie and Beni index method. The result of the research showed that business and home customer are more accurate if they are clustered into 3 clusters, while the industrial customer in some variable combination are more accurate if they are clustered into 3 clusters and the some variable combination are more accurate if they are clustered into 4 clusters. The result of customers’ character segmentation can be used as supporting data in making PLN’s business decision which is related to CRM.
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Judul: Pemberian astaxanthin dan vitamin E dalam pakan terhadap perkembangan gonad calon induk udang vaname, Litopenaeus vannamei.
Abstrak: High quality of shrimp larvae produced by using a good broodstock. Increase production high quality of white shrimp (Litopenaeus vannamei) broodstock can be done with the addition of vitamin E or astaxanthin. A dose used was 350 ppm vitamin E, 500 ppm astaxanthin, combination of 350 ppm vitamin E and 500 ppm astaxanthin, combination of 175 ppm vitamin E and 250 ppm astaxanthin. The purpose of this research was to evaluate the effect of astaxanthin and vitamin E supplementation with different dose in the feed on gonad maturity of white shrimp broodstock. Feeding of vitamin E and astaxanthin was performed in three times, at 06.00, 12.00 and 20.00 by as much as 2% of the shrimp weight. The results showed that dose was used combination of 175 ppm vitamin E and 250 ppm astaxanthin giving highest relative survival (100.00±0.00%), growth rate of broodstock shrimp (1.07±0.26%/day), the fastest maturity of first gonads level achieved 14 days (19.45 ±4.81%), maturity of fourth gonads level achieved 41 days, levels of spawning (33.33±8.33%), fecundity (87000±2000 eggs) and hatching rate (49±1.53%).
Keyword: vitamin E., white shrimp Litopenaeus vannamei, astaxanthin