Judul: Analisis Persepsi Konsumen Terhadap Keputusan Pembelian Alas Kaki Yongki Komaladi
Abstrak: Tujuan penelitian ini adalah untuk mengetahui pengaruh persepsi konsumen terhadap keputusan pembelian alas kaki Yongki Komaladi. Metode analisis yang digunakan adalah analisis regresi linier berganda. Variabel persepsi konsumen dalam penelitian adalah kualitas, harga, citra merek dan promosi penjualan. Hasil Uji F menunjukkan bahwa persepsi konsumen (kualitas, harga, citra merek dan promosi penjualan) secara simultan mempengaruhi keputusan pembelian alas kaki Yongki Komaladi. Hasil uji t menunjukkan bahwa kualitas (sig 0.366) memiliki pengaruh positif dan tidak signifikan terhadap keputusan pembelian alas kaki Yongki Komaladi. Harga (sig 0.014), citra merek (sig 0.059) dan promosi penjualan (sig 0.011) memiliki pengaruh positif dan signifikan terhadap keputusan pembelian alas kaki Yongki Komaladi.
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Judul: Analisis Persepsi Konsumen terhadap Keputusan Pembelian Online di Tokopedia.
Abstrak: Pengguna internet di Indonesia semakin meningkat. Hal itu berpengaruh positif terhadap transaksi jual beli online. Pada saat ini persaingan e-commerce semakin ketat di Indonesia. Tokopedia harus meningkatkan keunggulan dalam bersaing dengan e-commerce lainnya untuk menarik banyak konsumen dengan memahami persepsi konsumen dalam pengambilan keputusan pembelian. Tujuan dari penelitian ini adalah mengidentifikasi karakteristik konsumen Tokopedia dan menganalisis pengaruh harga, kualitas layanan, dan merek terhadap keputusan pembelian online Tokopedia. Metode pemilihan sampel menggunakan metode non-probability sampling dengan teknik purposive sampling. Metode analisis yang digunakan adalah analisis regresi linier berganda. Hasil uji F menunjukkan bahwa pengaruh harga, kualitas layanan dan citra merek berpengaruh signifikan terhadap keputusan pembelian online tokopedia (sig. 0.000). Hasil uji t bahwa harga (sig. 0.044), kualitas layanan (sig. 0.040), dan citra merek (sig. 0.000) memiliki pengaruh signifikan terhadap keputusan pembelian online Tokopedia.
Keyword: keputusan pembelian, regresi linier berganda, Tokopedia

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