Judul: Pengaruh Persepsi dan Gaya Hidup Mahasiswa terhadap Minat Investasi Reksa Dana Syariah pada Masa Pandemi Covid-19
Abstrak: Pandemi Covid-19 berdampak pada perekonomian yang semakin terpuruk, sehingga investasi menjadi salah satu jalan keluar yang perlu mendapat perhatian sebagai salah satu alternatif sumber pemasukan dari return yang dihasilkan. Penelitian ini bertujuan untuk menganalisis pengaruh persepsi dan gaya hidup mahasiswa terhadap minat investasi reksa dana syariah pada masa pandemi Covid-19. Penelitian ini menggunakan desain cross sectional study, dengan pendekatan kuantitatif dengan metode analisis SEM-PLS. Populasi penelitian ini adalah mahasiswa program S1 seluruh Indonesia. Responden dipilih secara voluntary sampling dengan jumlah responden sebanyak 100 responden. Mahasiswa muslim memiliki persepsi yang lebih baik dan minat investasi yang lebih tinggi terhadap reksa dana syariah, serta memiliki gaya hidup hedonis dibandingkan mahasiswa non-muslim. Kemudian, mahasiswa dengan persepsi baik terhadap reksa dana syariah dan memiliki gaya hidup hemat (frugal) berpengaruh meningkatkan minat investasi reksa dana syariah., The Covid-19 pandemic had an impact on the economy which is getting worse, so that investment is one way out that needs attention as an alternative source of income from the returns. This research aims to analyze the influence of undergraduate student perception and lifestyle towards investment interest on sharia mutual fund during the Covid-19 pandemic. This research used cross sectional study, with a quantitative approach. The population of this study were undergraduate students throughout Indonesia. Respondents were selected by voluntary sampling with a total of 100 respondents. Muslim students have a better perception and higher investment interest on sharia mutual fund, with hedonis lifestyle than non-muslim students. Then, students with a good perception of sharia mutual fund and frugal lifestyle have an effect on increase investment interest on sharia mutual fund
Keyword: Covid-19, investment interest, lifestyle, perception, sharia mutual fund

Judul: The Influence of Undergraduate Student Religion, Knowledge, and Attitude towards Investment Intention on Sharia Mutual Fund during The Covid-19 Pandemic
Abstrak: Salah satu sektor yang terdampak selama masa pandemi Covid-19 adalah sektor ekonomi. Dalam kondisi tersebut, masyarakat dituntut untuk mengatur keuangannya sebaik mungkin. Salah satu alternatif untuk mengatur keuangan adalah dengan melakukan investasi. Reksa dana syariah merupakan salah satu alternatif investasi yang mudah dan cocok untuk pemodal kecil. Reksa dana syariah cocok bagi investor pemula, salah satunya adalah mahasiswa. Penelitian ini dilakukan dengan tujuan untuk menganalisis pengaruh agama, pengetahuan, dan sikap mahasiswa terhadap minat investasi reksa dana syariah selama pandemi Covid-19. Penelitian ini menggunakan desain cross sectional, dengan pendekatan kuantitatif. Populasi penelitian ini adalah mahasiswa S1 seluruh Indonesia. Responden dipilih secara voluntary sampling dengan jumlah responden sebanyak 192 responden. Data yang diperoleh diolah menggunakan software microsoft excel dan SPSS versi 25. Pada analisis uji beda terdapat perbedaan minat investasi antara mahasiswa yang beragama islam dengan non-islam. Hasil uji hubungan menunjukkan bahwa terdapat hubungan yang signifikan antara pengetahuan dan sikap dengan minat investasi. Hasil analisis uji pengaruh menunjukkan pengetahuan dan sikap berpengaruh signifikan terhadap minat investasi., One of the sectors affected during the Covid-19 pandemic is the economic sector. Under these conditions, people are required to manage their finances as well as possible. One alternative to managing finances is to invest. Sharia mutual funds are an easy investment alternative that is suitable for small investors. Sharia mutual funds are suitable for novice investors, one of which is a college student. This study was conducted with the aim of analyzing the influence of students' religion, knowledge, and attitudes towards investment intention in sharia mutual fund during the Covid-19 pandemic. This study used a cross-sectional design, with a quantitative approach. The population of this study was undergraduate students throughout Indonesia. Respondents were selected by voluntary sampling with a total of 192 respondents. The data obtained were processed using Microsoft Excel and SPSS version 25 software. In the analysis of the difference test, there is a difference in investment intention between Muslim and non-Muslim students. The results of the relationship test showed that there was a significant relationship between knowledge and attitudes with investment intention. The results of the analysis of the influence test show that knowledge and attitudes have a significant effect on investment intention.
Keyword: Investment intention, knowledge, attitude, religion, sharia mutual funds

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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