Judul: Dampak frekuensi sel harapan yang rendah terhadap metode chaid
Abstrak: utomatic Interaction ·Detection) yang dikembangkan oleh Kass (1980), mernpakan suatu tcknik yang dapat ctigunakan untuk menelusuri struktur keterkaitan antar peubah. yaitu antara peubah respon dengan pcubah-peubah penjelas yang masing-masing merupak8.n peubah kategorik. CHAID merupakan teknik eksplorasi nonparmnetrik untuk menganalisis sekumpulan data yang besar clan berlipe kategorik. Interaksi antar peubah juga dapat dideleksi melalui melode ini (Du Toil et al .. 1986). CI-IAID banyak digunakan dalam penelitian sosial, khususnya untuk seg1ncntasi. CHAID dalam proscsnya berlandaskan pada uji khi-kuadrat yang dalam pcnggunaannya terdapal beberapa syarat yang hams terpenuhi, seperti jumlah kategori adalah tiga alau cmpat, dan minimum frckuensi sel harapan di tiap label konlingensi sama dengan 5 (Gibbons, 1985). Dalmn banyak kasus sering dijumpai bahwa fekuensi scl harapan tidak memenuhi persyaratm1 tersebut. Jika hal tersebut terjadi pada metode ini, maka akap terjadi dua proses, yaitu proses penggabungan dan proses CHAID akan berhenti (diluar anggapan bahwa prosesnya tetap akan berhenli jika semua peubah penjelas yang diamati telah dianalisis). Dalam tulisan ini, CHAID diterapkan untuk menelusuri peubah penjelas apa saja yang rnempengamhi kepernilikan ATM, yang dalam kasus ini didapatkan bahwa status bank mcmpengaruhi kepcmilikan ATM.
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Judul: Penentuan Karakteristik Kelancaran Pembayaran Kartu Kredit menggunakan Metode CHAID
Abstrak: The delivery of consumptive credit by either banks or financial institutions to the right debitur is important. This is done to decrease the loss risk that might be encountered by the banks or financial institutions. CHAID (Chi-square Automatic Interaction Detector) was used in this research, as it is a classification method which generates non-binary classification tree to determine significant factors that affected customer credit payment status. The result of this research showed six from ten predictors was having association with credit status. In this case, CHAID generates 14 segments and potential segments that pointed out qualified customer with well customer payment status, the customer having the characteristics of owning credit card from other banks, has been working for more than ten years, and at least having education of undergraduate or collage (second segment). The classification accuracy table concluded thath potential customers predicted precicely by 98.6%, whereas not qualified customers predicted precicely by 9.3%. The total percentage precice prediction is 80.8%.
Keyword: Customer characteristics, CHAID method, Credit card

Judul: Rancang Bangun Elemen Pemanas Bahan Bakar Minyak Nyamplung Untuk Motor Bakar Diesel dengan Memanfaatkan Panas Gas Buang
Abstrak: Tamanu oil is one of biosolar substituter as diesel engine fuel. High viscosity of tamanu oil becomes main obstacle in direct using of tamanu oil as diesel engine fuel. Heater element is made to decrease tamanu oil viscosity. Heater element is benefitted high temperature of diesel engine exhaust gas as reheating source. Optimum temperature which is needed to reduce tamanu oil viscosity of 3-5 cSt is 110 Celcius degree (biosolar viscosity of 30oC is 5-7 cSt). IV design of element heater has optimum tamanu oil reheating. There are four kind of tamanu oil that has different treatment. degumming neutralization (N4) tamanu oil has best quality with the lowest viscosity of 30cSt in 30oC. Tamanu oil (N4) usage as fuel occur reduction power of 12.26 %, torsion of 9.59 %, power maximum of diesel engine is 5.39 kW and maximum torsion of 123.74 Nm. Maximum power of diesel engine using biosolar is 5.99 kW and maximum torsion of 144.53 Nm. But then, tamanu oil can replace biosolar (fossil energy), without made as biodiesel first and mixed with biosolar.
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