Judul: Persepsi manfaat dan risiko dalam perilaku pembelian konsumen online shop
Abstrak: The attendance of the internet is used by marketing person to create a new shopping environtment that is e-commerce. One of real forms of the e-commerce is online shop. The purpose of this research was for analizing an example purchasing behaviour. Design of this research was cross sectional study. The election of research location was done with purposively, those are Kaskus, Facebook Online Shop, and Komunitas Online Shop. The pattern election was performed with purposive way that was the consumer who had shopped fashion, book and electronic. The kind of product was most bought by example that does not work that is fashion, meanwhile the example works that is a book. The frequeny of buying of the two example groups are included in low category. The address of online shop was most visited by example that does not work that was Kaskus, meanwhile the example works thas was Facebook online shop. The expense of online shopping by example that does not work including low category, meanwhile for the example that works including very high category. The payment method is had by the example groups was transfer method. Gotten nine factors that become an independent variable those are sex, age, education, job status, income, life style, benefit perception, risk perception, and online searching. Sex, income, benefit perception, and online searching variables are significant factors that influence a purchasing behaviour. Keywords: life style, perceived benefit, perceived risk, searching online, evaluation alternative and purchased behaviour.
Keyword: Persepsi manfaat, Persepsi risiko, Pencarian online, Gaya hidup, Evaluasi informasi, Perilaku pembelian

Judul: The Effect of, Perceived Risk, and Beauty Lifestyle towards Skincare Purchasing Decision on E-commerce
Abstrak: Era digitalisasi mendorong berkembangnya transaksi belanja online (ecommerce). Konsumen sering kali tidak menyadari bahwa dibalik kemudahan berbelanja terdapat risiko yang harus dipertimbangkan. Tujuan penelitian ini adalah menganalisis keputusan konsumen dalam membeli skincare melalui e-commerce. Metode survei yang digunakan untuk pengambilan data adalah teknik nonprobability sampling yaitu voluntary sampling. Data dianalisis dengan analisis deskriptif dan analisis kolerasi, sementara, analisis dilakukan dengan Structural Equation Modeling (SEM) menggunakan SmartPLS. Penelitian ini dilakukan terhadap 196 responden yang merupakan Warga Negara Indonesia (WNI), berusia minimal 17 tahun dan pernah membeli produk perawatan kulit melalui e-commerce. Hasil studi menunjukan bahwa keputusan pembelian responden tergolong baik sedangkan, persepsi risiko dan beauty lifestyle responden tegolong pada kategori sedang. Analisis SEM menunjukkan bahwa beauty lifestyle berpengaruh signifikan terhadap keputusan pembelian konsumen, sedangkan persepsi risiko tidak memiliki efek terhadap keputusan pembelian., The digitalisation era promotes the growth of e-commerce, which enables online shopping transactions. However, consumers may not be aware of the potential risks associated with the convenience of e-commerce. Therefore, this study aims to examine consumer decision making when purchasing skincare products through e-commerce. Non-probability sampling, specifically voluntary sampling, was employed to gather data. Data were analysed using descriptive analysis, and correlation analysis. Additionally, Structural Equation Modelling (SEM) was utilized through SmartPLS for analysis. The study was conducted on 196 Indonesian citizen, aged 17 years old and above, and have purchased skin care products through e-commerce. The study results indicate that the respondents' purchasing decisions were high, whereas their risk perception and beauty lifestyles were classified as medium. The results of the SEM analysis demonstrate that a beauty-oriented lifestyle significantly impacts consumer purchasing decision, whereas risk perception have no significant effect towards purchasing decision.
Keyword: Gaya hidup, keputusan pembelian, persepsi risiko, perawatan kulit

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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