Judul: Analisis Live Streaming Shopping TikTok terhadap Customer Trust dan Customer Engagement serta Dampaknya pada Purchase Intention
Abstrak: Pandemi Covid-19 menyebabkan pengguna media sosial di Indonesia meningkat. Adanya peningkatan pengguna media sosial menjadikan peluang bagi pelaku usaha untuk memasarkan bisnisnya. TikTok Shop merupakan salah satu scommerce yang memudahkan para penggunanya untuk berbelanja pada aplikasi tersebut tanpa harus berganti aplikasi. Salah satu fitur yang dimiliki TikTok Shop adalah Live Streaming. Konsumen masih belum sepenuhnya percaya dengan toko online karena maraknya kasus penipuan. Oleh karena itu, penelitian ini bertujuan untuk menganalisis live streaming shopping terhadap customer trust, customer engagement, dan purchase intention terhadap masyarakat Indonesia. Metode pengambilan sampel menggunakan purposive sampling yang melibatkan 647 responden. Pengolahan data pada penelitian ini menggunakan SEM-PLS. Hasil yang didapatkan adalah live streaming shopping memiliki pengaruh positif signifikan terhadap customer trust, customer engagement, dan purchase intention.
Keyword: customer engagement, customer trust, live streaming shopping, purchase intention

Judul: Analyzing the Influence of TikTok Strategies on Purchasing Decisions using TikTok Shop
Abstrak: Covid-19 forced almost all fulfillment of basic needs and various other activities to be diverted through digital services. Though they are now recovering, it seems that people are comfortable with the products and services provided through digital platforms, one of which is shopping through e-commerce. At this time, e-commerce competition is getting tougher in Indonesia coupled with the emergence of s-commerce. TikTok Shop as the most widely used s-commerce platform for shopping has its own way of being able to attract its consumers. The purpose of this study is to identify the characteristics of TikTok Shop consumers and analyze the influence of TikTok strategies such as live shopping, the TikTok algorithm, and the TikTok affiliate program on purchasing decisions through the TikTok Shop. The sample selection method uses a non-probability sampling method with a purposive sampling technique. The analytical method used is multiple linear regression analysis. The results show that TikTok Live Shopping, TikTok Algorithm, and the TikTok Affiliate Program have significant influences on purchasing decisions through the TikTok Shop.
Keyword: Purchasing Decision, Multiple Linear Regression, TikTok Shop, TikTok Live Shopping, TikTok Algorithm, TikTok Affiliate Program

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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