Judul: Behaviour Intention Analysis of Indodax Cryptocurrency Exchange Users in Jabodetabek Using the Technology Acceptance Model (TAM)
Abstrak: Penelitian ini didasarkan pada perkembangan teknologi informasi dalam bidang keuangan yang menciptakan mata uang digital terdesentralisasi atau cryptocurrency, melalui pedagang fisik aset kripto atau bursa seperti Indodax memungkinkan pengguna bertransaksi jual-beli cryptocurrency. Penelitian ini bertujuan untuk menganalisis pengaruh persepsi kegunaan, persepsi kemudahan, persepsi risiko, dan kepercayaan terhadap minat perilaku untuk menggunakan bursa Indodax. Penelitian ini menggunakan metode Structural Equation Modeling (SEM) dengan pendekatan Partial Least Square (PLS) dan analisis deskriptif. Teknik non-probability sampling digunakan untuk mengambil data primer melalui kuisioner online kepada 150 responden. Hasil penelitian menunjukkan bahwa minat perilaku pengguna dipengaruhi signifikan oleh persepsi kegunaan dan kepercayaan terhadap bursa. Hasil SEM juga menunjukkan faktor persepsi kemudahan dan persepsi risiko tidak berpengaruh terhadap minat perilaku pengguna. Prioritas utama bagi bursa cryptocurrency adalah meningkatkan kepercayaan pengguna., This research was based on the development of information technology in the financial sector which created a decentralized digital currency or cryptocurrency, through physical crypto traders or exchanges such as Indodax, users able to transact cryptocurrencies. This study was aimed to analyze the effect of perceived usefulness, perceived ease of use, perceived risk, and trust on user’s behaviour intention to use the Indodax exchange. This research used Structural Equation Modeling (SEM) with Partial Least Square (PLS) approach and descriptive analysis. Non-probability sampling technique was chosen to collect primary data through an online questionnaires towards 150 respondents. The results showed that the user's behaviour intention was significantly influenced by perceived usefulness and trust towards the exchange. The SEM results also showed that perceived ease of use and perceived risk has no effect on user behaviour intention. The top priority for cryptocurrency exchanges should be increasing their users trust.
Keyword: exchange, cryptocurrencies, trust, behaviour intention to use, perceived ease of use, perceived usefulness, perceived risk

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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