Judul: Faktor-Faktor yang Mempengaruhi Keputusan Menabung di Bank Syariah Selama Pandemi COVID-19
Abstrak: The Indonesian Government's policy regarding Large-Scale Social Restrictions (PSBB) in the context of accelerating the handling of the Corona Virus Disease 2019 (COVID-19) caused a decline in the economy and household income and led to an increase in the unemployment rate in Indonesia. On the other hand, the decline in the economic sector did not interfere with public demand for Islamic savings products in Indonesia. this is evidenced by the increasing number of sharia customers and deposits and stable FDR of sharia banks in the range of 77-100 percent since before and during the COVID-19 pandemic. This study aims to determine the characteristics and factors that influence the decision to save at Islamic banks during the COVID-19 pandemic. The sample used in this study amounted to 400 respondents. Data collection using a questionnaire distributed online. Based on the data obtained, the characteristics of the respondents in this study were dominated by respondents in the age range of 17-25 years, the majority of respondents live in West Java and work as a student. Furthermore, the data will be analyzed using logistic regression analysis. Based on the results of logistic regression, the variables of religiosity, knowledge, promotion, location and age have a posit ive and significant effect on decisions to save in Islamic banks during the COVID-19 pandemic. Keywords: COVID-19, Logistics Regression, Savings Decisions, Sharia Savings., Kebijakan Pemerintah Indonesia mengenai Pembatasan Sosial Berskala Besar (PSBB) atau sekarang dikenal dengan Pembatasan Pergerakan Kegiatan Masyarakat (PPKM) dalam rangka percepatan penanganan Corona Virus Disease 2019 (COVID-19) menyebabkan terjadinya penurunan pada perekonomian dan pendapatan rumah tangga serta menyebabkan terjadinya peningkatan angka pengangguran di Indonesia. Di sisi lain, penurunan sektor ekonomi tersebut tidak mengganggu permintaan masyarakat terhadap produk tabungan syariah di Indonesia. Hal ini dibuktikan dengan jumlah nasabah dan DPK syariah yang terus meningkat serta Financing to Deposit Ratio (FDR) bank syariah yang stabil pada range 77-100 persen semenjak sebelum dan selama pandemi COVID-19. Penelitian ini bertujuan untuk mengetahui karakteristik dan faktor-faktor yang mempengaruhi keputusan menabung di bank syariah selama pandemi COVID-19. Sampel yang digunakan pada penelitian ini berjumlah 400 responden. Pengambilan data menggunakan kuesioner yang disebar secara online. Berdasarkan data yang didapatkan, karakteristik responden pada penelitian ini di dominasi oleh responden pada range usia 17-25 tahun, mayoritas responden berdomisili di Jawa Barat dan berprofesi sebagai pelajar/mahasiswa. Selanjutnya, data akan dianalisis menggunakan analisis regresi logistik. Berdasarkan hasil regresi logistik, variabel religiusitas, pengetahuan, promosi, lokasi dan usia berpengaruh positif dan signifikan terhadap keputusan menabung di bank syariah selama pandemi COVID-19. Kata kunci: COVID-19, Keputusan Menabung, Regresi Logistik, Tabungan Syariah.
Keyword: Logistics Regression, Savings Decisions, Sharia Savings, COVID-19

Judul: Analysis of Factors Affecting Islamic Banking Financing during the COVID-19 Pandemic
Abstrak: Penyebaran COVID-19 menjadi salah satu ancaman terbesar bagi ekonomi global dan pasar keuangan di dunia. Penelitian ini dilakukan untuk mengetahui pengaruh faktor-faktor yang memengaruhi pembiayaan bagi hasil selama pandemi COVID-19 terhadap perbankan syariah di Indonesia. Penelitian ini menggunakan sampel 13 Bank Umum Syariah dan 20 Unit Usaha Syariah serta periode waktu kuartal I-IV 2020. Alat analisis yang digunakan dalam penelitian ini adalah regresi data panel dengan pendekatan Random Effect Model (REM). Hasil penelitian menunjukkan bahwa DPK, NPF, FDR, ROA, PDB, inflasi dan jumlah uang beredar secara simultan berpengaruh terhadap pembiayaan bagi hasil. Untuk hasil estimasi secara parsial, variabel DPK, FDR, dan ROA berpengaruh signifikan dan positif terhadap pembiayaan bagi hasil. Sedangkan variabel NPF, PDB, inflasi, dan jumlah uang beredar tidak berpengaruh signifikan terhadap pembiayaan bagi hasil., The spread of COVID-19 is becoming one of the biggest threats to the global economy and financial markets in the world. This study is conducted to determine the effect of the factors that influence profit-sharing financing during the COVID-19 pandemic on Islamic banking in Indonesia. This study uses a sample of 13 Islamic Commercial Banks and 20 Sharia Business Units and the time period is quarter I-IV 2020. The analytical tool used in this study is panel data regression with the Random Effect Model (REM) approach. The results indicate that DPK, NPF, FDR, ROA, GDP, inflation and the money supply simultaneously has an effect on profit sharing financing. For the partial estimation results, the variables of DPK, FDR, and ROA have a significant and positive effect on profit sharing financing. While the variables of NPF, GDP, inflation, and the money supply have no significant effect on profit sharing financing.
Keyword: COVID-19, financial performance, Islamic banking financing, macroeconomics, panel data

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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