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: 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: Penggunaan Metode Homotopi untuk Menyelesaikan Persamaan KdV (Korteweg-de Vries)
Abstrak: Natural phenomena can be explained using nonlinear mathematical models. In this paper, we studied the solution of KdV equation using the Homotopy method. The KdV equation is used for describing both surface and internal waves. One of the solutions is called a solitary wave. The use of homotopy method to solve the KdV equation required a nonlinear operator which was determined by the nonlinear form of the KdV equation itself. Based on this operator, a recursive formula was obtained to get a sequence of the KdV solution. The higher the sequence order of the sequence used, the closer to the exact solution of the KdV equation.
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