Judul: Memprediksi Minat Konsumen Shampo dalam Berpindah Merek  dengan Menggunakan Analisis Regresi Logistik dan Multivariate  Adaptive Regression Splines (MARS)
Abstrak: Kepuasan pelanggan tidak selalu memberikan jaminan bahwa konsumen akan loyal terhadap produk yang digunakan. Walaupun konsumen sudah sangat puas terhadap kualitas produk/jasa, ternyata masih banyak yang berpindah ke merek lain. Untuk mengetahui faktor-faktor yang berpengaruh bagi minat konsumen dalam berpindah merek dan membangun model prediksinya dapat dilakukan dengan analisis regresi. Dalam karya ilmiah ini digunakan dua analisis regresi yaitu analisis regresi logistik dan Multivariate Adaptive Regression Splines (MARS). Berdasarkan hasil analisis yang digunakan, model prediksi MARS lebih sesuai daripada model prediksi regresi logistik. Pada hasil analisis MARS, faktor-faktor yang mempengaruhi minat konsumen dalam berpindah merek adalah usia, jenis kelamin, pendidikan, pekerjaan, status perkawinan, agama, jumlah merek, dan tingkat pendapatan.
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Judul: Analisis biplot dan rantai markov untuk menelaah perilaku konsumen majalah berita mingguan
Abstrak: Perpindahan merek (brand switching) majalah berita mingguan (MBM) akibat kelangkaan produk di pasar sering kali terjadi. Salah satu penyebabnya adalah persepsi konsumen yang tetap merasa terpenuhi kebutuhannya dengan membeli majalah lain. Dalam penelitian ini dipelajari persepsi konsumen di tiga kota, Bandung, Medan dan Surabaya terhadap derajat kepentingan atribut majalah serta perpindahalihan dari MBM yang satu ke MBM yang lain. Persepsi konsumen dianalisis dengan menggunakan metode biplot, sedangkan perpindahalihan dianalisis dengan menggunakan rantai Markov.
Keyword: brand switching, perilaku konsumen, persepsi konsumen

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