Judul: Pengaruh Online Consumer Review dan Rating Terhadap Minat Beli Produk Erigo pada E-Commerce Tokopedia di Jabodetabek.
Abstrak: Tokopedia merupakan salah satu e-commerce yang sedang berkembang di Indonesia dan menyediakan fitur online consumer review dan rating pada platformnya. Salah satu jenis produk yang paling laris di tokopedia di tahun 2021 adalah bidang fashion. Penelitian ini bertujuan untuk menganalisis pengaruh online consumer review dan rating terhadap minat beli produk Erigo pada e-commerce Tokopedia. Penarikan sampel dilakukan dengan teknik purposive sampling. Metode yang digunakan dalam penelitian ini adalah analisis deskriptif dan SEM-PLS. Hasil dari penelitian ini menunjukkan bahwa online consumer review dan rating berpengaruh signifikan terhadap minat beli produk Erigo pada e-commerce Tokopedia di Jabodetabek dengan variable rating memiliki pengaruh lebih dominan., Tokopedia is one of the growing online marketplaces in Indonesia that provides online consumer review and rating features on its. On of the best selling types of product on tokopedia in 2021 is the fashion sector. This study aimed to analyze the effect of online consumer review and rating on purchase intention of Erigo products on tokopedia online marketplace. The sampling method used in this study was purposive sampling technique. The method used in this research was descriptive analysis and SEM-PLS. The results of this study indicate that online consumer reviews and ratings have a significant effect on buying interest in Erigo products at Tokopedia e-commerce in Jabodetabek with the rating variable having a more dominant influence.
Keyword: Erigo, online consumer review, purchase intention, rating, Tokopedia

Judul: Factors Influencing the Purchase Intention and Purchase Decision of Erigo Products in Jabodetabek
Abstrak: Erigo merupakan brand fashion lokal asal Indonesia yang berhasil merajai pasar nasional dan memasuki kancah internasional. Pencapaian ini menunjukkan kompetensi Erigo dalam pemasaran dan penjualan produknya. Penelitian ini bertujuan untuk menganalisis pengaruh brand awareness, brand association, perceived quality, trial dan preference terhadap purchase intention dan purchase decision produk Erigo di Jabodetabek. Sumber data yang digunakan terdiri dari data primer berupa kuesioner dan data sekunder berupa studi literatur. Teknik penarikan sampel pada penelitian ini menggunakan metode purposive sampling dengan 380 responden. Metode pengolahan dan analisis data pada penelitian ini adalah analisis deskriptif dan SEM PLS. Hasil penelitian menunjukkan bahwa brand awareness dan brand association berpengaruh positif dan signifikan terhadap purchase intention. Variabel trial dan purchase intention berpengaruh positif dan signifikan terhadap purchase decision produk Erigo di Jabodetabek. Brand association memiliki pengaruh paling kuat pada purchase intention yaitu sebesar 0,317 dan trial adalah variabel eksogen yang memiliki pengaruh paling kuat pada purchase decision yaitu sebesar 0,286.
Keyword: erigo, purchase decision, purchase intention, SEM-PLS

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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