Judul: Pengaruh E-service Quality dan Brand Image terhadap Minat Menggunakan Kembali Aplikasi Bibit
Abstrak: Perkembangan globalisasi membuat segala aktivitas tidak bisa terlepas dari bantuan teknologi, tidak terkecuali pada sektor investasi digital. Meningkatnya jumlah investor membuat berbagai aplikasi investasi digital bersaing untuk mencari penggunanya dengan meningkatkan kualitas layanan serta citra mereknya. Tujuan penelitian ini adalah menganalisis pengaruh e-service quality dan brand image terhadap minat menggunakan kembali aplikasi Bibit. Penelitian ini dilakukan di wilayah Jabodetabek dengan metode kuantitatif. Sampel yang diteliti adalah pengguna aplikasi Bibit di Jabodetabek dan berusia di antara 17 - 30 tahun sebanyak 160 orang yang dipilih menggunakan teknik purposive sampling. Metode pengolahan data menggunakan SEM-PLS dengan aplikasi Smart PLS 3. Hasil penelitian menunjukkan bahwa terdapat pengaruh positif dan signifikan dari e-service quality dan brand image terhadap minat menggunakan kembali aplikasi Bibit. Untuk penelitian selanjutnya dapat memperluas cakupan penelitiannya ke wilayah Pulau Jawa atau daerah lain serta dapat menambah variabel lain seperti promosi dan kemudahan penggunaan terhadap minat menggunakan kembali Bibit., The development of globalization has made all activities inseparable from technological assistance, including the digital investment sector. The increasing number of investors have made various digital investment applications compete to find users by improving the quality of service and brand image. The purpose of this study was to analyze the effect of e-service quality and brand image on the intention to reuse the Bibit application. This research was conducted in the Jabodetabek area using a quantitative method. The sample studied was Bibit application users in Jabodetabek and aged between 17-30 years as many as 160 people selected using a purposive sampling technique. The data processing method uses SEM-PLS with the Smart PLS application 3. The results show that there was a positive and significant effect of e-service quality and brand image on the interest in reusing the Bibit application. others and can add other variables such as promotions and ease of use to interest in reusing Bibit.
Keyword: Bibit Application, brand image, e-service quality, SEM-PLS

Judul: Faktor yang Memengaruhi Penggunaan Aplikasi Bibit untuk Berinvestasi Reksa Dana Syariah pada Generasi Muda
Abstrak: Reksa dana syariah terus mengalami perkembangan dari tahun ke tahun, namun pangsa pasar reksa dana syariah masih kecil dibandingkan dengan reksa dana konvensional. Keberadaan financial technology memiliki peran strategis dalam meningkatkan investasi reksa dana syariah. Aplikasi Bibit merupakan salah satu aplikasi investasi resmi yang bertindak sebagai Agen Penjual Efek Reksa Dana (APERD). Penelitian ini bertujuan menganalisis faktor yang memengaruhi penggunaan aplikasi Bibit untuk berinvestasi reksa dana syariah pada generasi muda. Penelitian ini merupakan jenis penelitian kuantitatif dengan pendekatan SEM-PLS dan kualitatif dengan analisis deskriptif. Sampel dalam penelitian ini adalah 300 orang pengguna Bibit yang berinvestasi reksa dana syariah. Hasil penelitian ini menunjukkan bahwa faktor-faktor yang memengaruhi penggunaan aktual aplikasi Bibit untuk berinvestasi reksa dana syariah adalah perceived ease of use, perceived usefulness, perceived risk, social influence, attitude toward using, dan behavioral intention to use. Aplikasi Bibit disarankan mampu meningkatkan kualitas dan keamanan layanan pengguna serta menyebarluaskan kampanye terkait investasi reksa dana syariah., Islamic mutual funds continue to develop from year to year, but the market share of Islamic mutual funds is still small compared to conventional mutual funds. The existence of financial technology has a strategic role in increasing Islamic mutual fund investment. Bibit is one of the official investment applications that acts as a Selling Agent for Mutual Funds (APERD). This study aims to analyze the factors that influence the use of Bibit application for investing in Islamic mutual funds in the young generation. This research is a type of quantitative research with SEM-PLS approach and qualitative with descriptive analysis. The sample in this study is 300 Bibit users who invest in Islamic mutual funds. The results of this study indicate that the factors that influence the actual use of the Bibit application for investment in Islamic mutual funds are perceived ease of use, perceived benefits, perceived risk, social influence, attitudes towards use, and behavioral intentions to use. It is recommended that the Bibit application be able to improve the quality and security of services to users and disseminate campaign about Islamic mutual fund investment.
Keyword: Bibit application, investment, Islamic mutual funds, SEM-PLS, Technology Acceptance Model

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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