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: Analysis of Investors in Jabodetabek Intention for Using the IPOT Application using the Technology Acceptance Model (TAM) Approach
Abstrak: Perkembangan teknologi informasi turut merevolusi kegiatan bisnis menuju ke arah digital. Pasar modal merupakan salah satu usaha yang merevolusi model bisnisnya ke arah digital. IPOT merupakan salah satu platform penyedia layanan untuk melakukan transaksi di Bursa Efek Indonesia (BEI). Saat ini, IPOT merupakan aplikasi paling digemari di Indonesia untuk melakukan transaksi di pasar modal. Penelitian ini bertujuan untuk menganalisis pengaruh persepsi manfaat, persepsi kemudahan, dan persepsi kepercayaan terhadap minat penggunaan aplikasi IPOT pada investor di Jabodetabek. Penelitian ini menggunakan perangkat lunak IBM SPSS Statistics 26 dan SmartPLS 3.0 untuk pengolahan data. Hasil dari penelitian ini menunjukkan adanya pengaruh positif signifikan dari persepsi manfaat dan persepsi kemudahan dalam minat investor untuk menggunakan aplikasi IPOT, serta ditemukan persepsi kepercayaan tidak mempengaruhi minat investor untuk menggunakan aplikasi IPOT., The development of information technology is revolutionizing business activities towards digital. The capital market is one of the businesses that revolutionizes its business model towards digital. IPOT is a service provider platform for conducting transactions on the Indonesia Stock Exchange (IDX). Currently IPOT is the most popular application in Indonesia to perform transactions in the capital market. This study aims to analyze the effect of perceived usefulness, perceived ease of use, and perceived trust on investors intention in using the IPOT application in Jabodetabek. This research uses IBM SPSS Statistics 26 and SmartPLS 3.0 software for data processing. The results of this study indicate that there is a significant positive effect of perceived usefulness and perceived ease of use in investors intention to use the IPOT application, and it is found that the perceived trust does not affect investor intention to use the IPOT application.
Keyword: IPOT, Persepsi Manfaat, Persepsi Kemudahan, Persepsi Kepercayaan, Minat Pengunaan

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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