Judul: Pengaruh Persepsi dan Pengetahuan terhadap Perilaku Pembelian Perhiasan Emas pada Keluarga Petani
Abstrak: Gold is a precious metal and include to pure metal groups which has a high value. Generally, gold jewelry is a form of savings deposits and have the high liquidity. The aim of this study is to know the influence of consumer perception and knowledge towards purchase behavior on gold. This research used 65 samples. All samples in this research are 65 people. Data were collected through interviews using questionnaires. The results showed that sample’s age included in the category of middle adulthood with educational range of each sample less than six years, and due to family size those family include to small family category. According to analysis data (93.8%) have a good perception of the gold jewelery and (55.4%) have a good perceptions of gold jewelry. There are (72.3%) samples have a good knowledge about gold and jewelry (55%) instances ever made a purchase of gold jewelry. Due to regression test results show that the perception of a savings and total assets possess significant influence on purchase frequence of buying gold as saving, and the total assets of the family had an influence on the weight of gold jewelry is purchased by them.
Keyword: perception, knowledge, gold purchase behavior

Judul: Pengaruh Persepsi Risiko dan Financial Self-Efficacy terhadap Minat Investasi Emas pada Generasi Z
Abstrak: Emas dipandang sebagai produk investasi dengan risiko rendah, namun setiap individu tentu memiliki perbedaan persepsi yang dapat mempengaruhi pilihan investasi. Selain itu, dalam berinvestasi juga dapat dipengaruhi oleh financial self efficacy. Penelitian ini dilakukan dengan tujuan menganalisis pengaruh persepsi risiko dan financial self-efficacy terhadap minat investasi emas. Penelitian menggunakan desain cross sectional study dengan 188 responden generasi Z berusia 17-26 tahun di Indonesia. Data dikumpulkan secara online menggunakan Google Form. Hasil menunjukkan adanya hubungan positif signifikan antara jumlah tanggungan dengan financial self-efficacy dan minat investasi emas serta usia dengan minat investasi emas. Hubungan negatif ditemukan antara persepsi risiko dengan minat investasi emas. Hasil uji regresi menunjukkan jumlah tanggungan, usia, berpengaruh positif terhadap minat investasi emas, sementara pengaruh negatif ditemukan pada variabel persepsi risiko., Gold as an investment is categorised as low risk product, however each individual have their own risk perception, and it is projected that financial self efficacy could also affect the intention to buy gold as investment. The aims of this research is to analyze the influence of risk perception and financial self-efficacy towards intention to invest in gold. This quantitative study was conducted in Indonesia. Using a cross-sectional study design about 188 generation Z aged 17-26 years were involved as the respondents. Data was collected online using Google Form. The results show that the number of dependents has a significant positive relationship with financial self-efficacy and intention to invest in gold. Similarly, age has a positive correlation with intention to invest in gold, while a negative relationship was found. In addition, there is a positive influence on the number of dependents and age towards the intention to invest in gold, while the effect of perceived risk is negative.
Keyword: financial self-efficacy, gold investment intention, risk perception, generation Z

Judul: Pemanenan Energi Listrik dari Kincir Angin Vertikal
Abstrak: Usaha pemanenan energi angin di Indonesia masih sedikit. Sampai Tahun 2016 hanya 3.54 MW alat pemanenan energi angin yang sudah terpasang. Kendala utamanya ialah dibutuhkan investasi yang besar untuk membuatnya. Pembuatan kincir angin dengan ukuran yang lebih kecil dengan bahan yang dapat dibeli di pasar lokal menjadi solusi agar pembuatan kincir angin lebih ekonomis. Pembuatan kincir vertikal tipe Savonius dapat menjadi solusinya. Kincir vertikal Savonius dapat beroperasi pada kecepatan < 3 m/s dan ketinggian < 50 m. Kincir angin ini terdiri dari tiga sistem, yaitu generator, rotor kincir dan transmisi pulley-belt. Generator dibuat dari modifikasi motor AC dan magnet neodymium. Rotor kincir dibuat dari pipa PVC 4”, pipa alumunium ¾”, dan papan polikarbonat. Transmisi pulley-belt dibuat dari plastik dan karet. Kincir ini membutuhkan gaya minimal 3 N untuk dapat berputar atau torsi minimalnya 0.75 Nm. Kecepatan angin yang dibutuhkan untuk merotasikannya sebesar 1.9 m/s. Daya maksimal yang dapat dihasilkan ialah 5.76 watt berupa tegangan sebesar 36 volt dan arus 160 mA.
Keyword: energi terbarukan, generator, motor AC, sudu Savonius