Judul: Faktor-Faktor yang Memengaruhi Loyalitas Nasabah Bank Syariah Indonesia di Kabupaten Bogor
Abstrak: Perkembangan perbankan syariah di Indonesia saat ini mengalami kenaikan yang cukup signifikan dalam lima tahun terakhir. Bank Syariah Indonesia menjadi top brand image nomor satu dalam kategori Tabungan syariah menurut Top Brand Index tahun 2023. Namun pada awal Mei 2023, terjadi kasus serangan dari sebuah grup peretas ke layanan BSI yang menyebabkan layanan mengalami gangguan dan keluhan dari nasabah terkait sejumlah layanan yang tidak dapat berfungsi. Penelitian ini bertujuan untuk mengetahui faktor-faktor yang berpengaruh terhadap loyalitas nasabah Bank Syariah Indonesia di Kabupaten Bogor. Metode yang digunakan dalam penelitian adalah analisis regresi logistik. Pengambilan sampel menggunakan non-probability sampling dengan subjek penelitian generasi milenial sebanyak 100 responden di Kabupaten Bogor. Hasil analisis regresi logistik menunjukkan bahwa terdapat pengaruh positif dan signifikan antara variabel brand trust, brand image, dan perceived quality terhadap loyalitas nasabah Bank Syariah Indonesia di Kabupaten Bogor secara parsial maupun simultan., The development of Islamic banking in Indonesia is currently experiencing a significant increase over the last five years. Bank Syariah Indonesia became the number one top brand in the Sharia Savings category according to the top brand index in 2023. However in May 2023, there was a case of attack from a hacker group to BSI services which caused service disruptions and complaints from customers regarding a number of services that could not function. This study aims to determine the factors that influence the loyalty of Bank Syariah Indonesia customers in Bogor Regency. The method used in the research is logistic regression analysis. Sampling using non-probability sampling with millennial generation research subjects as many as 100 respondents in Bogor Regency. The results of logistic regression analysis show that there is a positive and significant influence between the variables of brand trust, brand image, and perceived quality on the loyalty of Bank Syariah Indonesia customers in Bogor Regency partially or simultaneously.
Keyword: brand trust, regresi logistik, brand image, loyalitas nasabah, perceived quality

Judul: Analisis Faktor-faktor yang Memengaruhi Masyarakat Muslim Kota Bogor dalam Memilih Menabung di Bank Syariah
Abstrak: Perkembangan bank syariah di Indonesia sudah semakin baik, namun persentase jumlah nasabah bank syariah terhadap jumlah populasi muslim di Indonesia hanya sebesar 17,3 persen. Hal ini menunjukan bahwa masih sedikitnya masyarakat yang memilih untuk menabung di bank syariah. Penelitian ini bertujuan untuk mendeskripsikan persepsi masyarakat muslim Kota Bogor terhadap bank syariah dan menganalisis faktor-faktor yang memengaruhi keputusan masyarakat muslim Kota Bogor dalam memilih menabung di bank syariah dengan mengambil responden sebanyak 80 responden. Metode pengumpulan data dengan penyebaran kuesioner secara online melalui google form, sedangkan metode analisis yang digunakan adalah analisis deskriptif dan analisis regresi logistik. Hasil penelitian ini menunjukkan bahwa pengetahuan, pendapatan dan layanan digital berpengaruh positif dan signifikan terhadap keputusan memilih menabung di bank syariah., The development of Islamic banks in Indonesia is getting better, however the percentage of Islamic bank customers against the number of muslim populations in Indonesia is only 17,3 percent. This shows that there are still few people who choose to save in Islamic banks. This study aims to describe the perception of the Muslim community of Bogor City towards Islamic banks and analyze the factors that influence the saving decision of muslim community in Bogor City in Islamic banks with 80 respondents. The method of data collection is by distributing online questionnaires via google form, while the analytical methods used are descriptive analysis and logistic regression analysis. The results of this study indicate that knowledge, income and digital service had a positive and significant effect on saving decisions in Islamic banks.
Keyword: bank syariah, menabung, persepsi, regresi logistik

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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