Judul: Analysis of Intention to Reuse Shopee Affiliates Referral Link with the Technology Acceptance Model (TAM) Approach
Abstrak: Pandemi Covid-19 membuat transaksi digital khususnya e-commerce terus meningkat. Shopee merupakan situs e-commerce yang paling banyak dikunjungi setiap bulannya di Indonesia. Salah satu program yang diadakan oleh shopee adalah Shopee Affiliate, yakni program yang memberikan penghasilan tambahan kepada individu yang aktif mempromosikan berbagai produk di media sosial. Melalui program ini suatu merek dapat meningkatkan kepercayaan dari konsumen karena konsumen mendapatkan ulasan langsung. Penelitian ini bertujuan untuk mengetahui karakteristik konsumen Shopee, menganalisis faktor yang memengaruhi intention to reuse referral link yang diberikan shopee affiliates dengan pendekatan Technologi Acceptance Model (TAM). Sampel penelitian ini berjumlah 192 orang di Kota Bogor dan metode yang digunakan adalah non- probability sampling jenis voluntary sampling. Pengolahan data penelitian ini menggunakan SEM-PLS. Hasil dari penelitian menunjukkan bahwa adanya pengaruh perceived usefulness dan attitude toward using terhadap intention to reuse, sedangkan influencer trust tidak memiliki pengaruh terhadap intention to reuse.
Keyword: affiliate, e-commerce, minat, referral, tam

Judul: Pengaruh Perceived Usefulness, Perceived Ease of Use, dan Perceived Risk terhadap Intention to Reuse ShopeePay pada Masa Pandemi COVID-19
Abstrak: World Health Organization telah menganjurkan kebijakan physical distancing untuk mengurangi kontak fisik, termasuk transaksi pembayaran selama masa pandemi COVID-19. Pembayaran digital merupakan salah satu alternatif untuk mengurangi risiko selama masa pandemi COVID-19. Salah satu pembayaran digital teratas selama masa pandemi COVID-19 ialah ShopeePay. Penelitian ini secara garis besar bertujuan untuk menganalisis pengaruh perceived usefulness, perceived ease of use, dan perceived risk terhadap intention to reuse ShopeePay di Jabodetabek. Responden pada penelitian ini sebanyak 492 responden. Teknik penentuan sampel dilakukan menggunakan non probability sampling dengan metode judgmental sampling. Teknik analisis data yang digunakan adalah analisis deskriptif dan SEM PLS. Hasil dari penelitian ini menunjukkan bahwa perceived usefulness, perceived ease of use, dan perceived risk memiliki pengaruh positif signifikan terhadap Intention to Reuse ShopeePay pada masa pandemi COVID-19. Kata kunci : Intention to Reuse, perceived usefulness, perceived ease of use, perceived risk, shopeepay, World Health Organization has recommended a physical distancing policy to reduce physical contact, including payment transactions during the COVID-19 pandemic. Digital payments are an alternative to reduce risk during the COVID-19 pandemic. One of the top digital payments during the COVID-19 pandemic was ShopeePay. This study broadly aims to analyze the effect of perceived usefulness, perceived ease of use, and perceived risk on the Intention to Reuse ShopeePay in Jabodetabek. Respondents in this study were 492 respondents. The sampling technique was carried out using non probability sampling with judgmental sampling method. The data analysis technique used is descriptive analysis and SEM PLS. The results of this study indicate that perceived usefulness, perceived ease of use, and perceived risk have a significant positive effect on ShopeePay's Intention to Reuse during the COVID-19 pandemic. Keywords: Intention to Reuse, perceived usefulness, perceived ease of use, perceived risk, shopeepay
Keyword: Intention to Reuse, Perceived Usefulness, Perceived Ease of Use, Perceived Risk, ShopeePay

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.
Keyword: