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 Towards Purchase Decision and Repurchase Intention of Erigo Products in Jabodetabek
Abstrak: Erigo adalah merek pakaian lokal asal Indonesia yang berhasil menampilkan koleksinya di ajang New York Fashion Week 2022. Pencapaian ini menunjukkan kompetensi Erigo dalam pemasaran dan penjualan produknya. Penelitian ini secara garis besar bertujuan untuk menganalisis pengaruh conformity, devotion, fanaticism, perceived enjoyment, dan perceived price terhadap purchase decision dan repurchase intention produk Erigo di Jabodetabek. Teknik penentuan sampel dilakukan menggunakan non-probability sampling dengan metode purposive sampling. Sumber data yang digunakan terdiri dari data primer berupa kuesioner dan data sekunder berupa literatur terkait. Teknik analisis data yang digunakan adalah analisis deskriptif dan SEM-PLS. Hasil dari penelitian ini menunjukkan bahwa devotion, fanaticism, dan perceived price memiliki pengaruh yang signifikan terhadap purchase decision. Conformity, perceived enjoyment, dan purchase decision memiliki pengaruh yang signifikan terhadap repurchase intention., Erigo is Indonesian clothing brands that successfully shows their collection at New York Fashion Week 2022. This achievement shows Erigo's competence in marketing and selling aspects. This study aims to analyze the effect of conformity, devotion, fanaticism, perceived enjoyment, and perceived price on purchase decisions and repurchase intentions of Erigo products, especially for consumer that domicile in Jabodetabek area. The sampling technique is using non-probability sampling with a purposive sampling method. Data sources that used in this research are consisted of primary data in the form of questionnaires and secondary data in the form of related literature. The data analysis technique used is descriptive analysis and SEM PLS. The results of this study showed that devotion, fanaticism, and perceived price have significant effect to purchase decision. Conformity, perceived enjoyment, and purchase decision have significant effect to repurchase intention.
Keyword: conformity, devotion, fanaticism, perceived enjoyment, perceived price

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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