Judul: The Influence of Interest in Korean Culture on Purchase Intention of Kimchi in Jakarta
Abstrak: Meningkatnya tren budaya Korea dan oleh popularitas konten drama dan musik asal Korea Selatan di Indonesia telah membuat produk-produk Korea seperti makanan, fashion, dan kosmetik masuk ke pasar Indonesia. Salah satu produk makanan Korea Selatan yang memiliki peluang pasar di Indonesia adalah kimchi. Kimchi sudah beredar pada pasar Indonesia melalui supermarket ataupun marketplace. Penelitian ini secara khusus bertujuan untuk menganalisis pengaruh ketertarikan pada budaya Korea terhadap niat pembelian kimchi, dengan berlandaskan teori perilaku terencana. Penelitian ini menggunakan data primer dari 141 responden di Jakarta yang didapatkan melalui penyebaran kuesioner secara daring. Melalui metode analisis PLS-SEM, hasil penelitian menunjukkan bahwa variabel ketertarikan pada budaya Korea, sikap, dan norma subjektif berpengaruh positif dan signifikan terhadap niat pembelian kimchi. Untuk meningkatkan niat pembelian kinchi, produsen disarankan untuk fokus kepada peningkatan brand image kimchi, dan dengan menggunakan elemen-elemen budaya Korea dalam program pemasarannya., The increasing trend of Korean culture and the popularity of Korean content, particularly dramas and music, in Indonesia have led Korean products such as food, fashion, and cosmetics to enter the Indonesian market. One of the Korean products that has market potential in Indonesia is kimchi. Kimchi is already available in Indonesian markets through supermarkets and online marketplaces. This research specifically aims to analyze the influence of interest in Korean culture on the intention to purchase kimchi, based on the Theory of Planned Behavior. The research uses primary data from 141 respondents in Jakarta, collected through online questionnaires. Through PLS-SEM analysis, the results show that variables such as interest in Korean culture, attitude, and subjective norms have a positive and significant influence on the intention to purchase kimchi. To increase the intention to purchase kimchi, producers are recommended to focus on enhancing the brand image of kimchi and using Korean cultural elements in their marketing programs.
Keyword: PLS-SEM, kimchi, budaya korea, niat pembelian

Judul: Analysis Country of Origin and Instant Noodles Attribute on Repurchase Intention in Indonesia (Study Case Instant Noodles Indonesia and South Korea)
Abstrak: Indonesia merupakan negara dengan tingkat konsumsi mi instan tertinggi kedua di dunia 2021, dengan pangsa pasar mi instan dalam negeri dikuasai oleh brand domestik. Namun secara ekspor mi instan Indonesia 2020 menempatkan urutan ke-3 di dunia. Penelitian ini melakukan perbandingan produk domestik dan impor dalam mendukung peningkatkan penjualan dan perluasan pangsa pasar mi instan Indonesia di dalam dan luar negeri, dengan menggunakan mi instan Indonesia dan Korea Selatan sebagai objek penelitian. Tujuan penelitian ini adalah mengidentifikasi profil konsumen, menganalisis pengaruh country of origin dan atribut mi instan terhadap kepuasan konsumen, serta menganalisis kepuasan konsumen dan loyalitas pelanggan terhadap minat beli ulang. Metode penentuan sampel menggunakan purposive sampling dan quota sampling yang melibatkan 384 responden. Hasil penelitian menunjukkan karakteristik responden didominasi oleh wanita dengan rentang usia 18 sampai 24 tahun yang sebagian besar ditingkat pendidikan adalah sarjana (D4/S1) dan memiliki pendapat dibawah Rp 4.420.000 per bulan. Hasil analisis SEM Partial Least Squares (PLS) menunjukkan country of origin dan harga tidak pengaruh signifikan terhadap kepuasan konsumen dikedua objek. Variabel kualitas dan etnosentrisme memiliki pengaruh signifikan terhadap kepuasan konsumen hanya pada mi instan Korea Selatan, serta kepuasan konsumen dan loyalitas pelanggan memiliki pengaruh signifikan terhadap niat beli ulang., Indonesia has the second highest consumption of instant noodles worldwide in 2021 as instant noodles market share is dominated by domestic brands. However, in terms of exports of instant noodles, Indonesia 2020 ranks 3rd in the world. This study compares domestic and imported products in support of increasing sales and expanding the market share of Indonesia instant noodles, using Indonesia and South Korean instant noodles as research objects. The aim of this research was to identify consumer profiles, analyze country of origin effect, and attributes of instant noodles on consumer satisfaction, and analyze consumer satisfaction and customer loyalty on repurchase intention. The method of sample determination is purposive and quota sampling with 384 respondents. The results showed that respondent characteristics were dominated by women aged 18 to 24 with an undergraduate level of education (D4/S1) and incomes below Rp4.420.000 per month. The results of the SEM Partial Least Squares (PLS) analysis show that country of origin and price have no significant effect on consumer satisfaction in both objects. Quality and ethnocentrism variables have a significant effect on consumer satisfaction only on South Korean instant noodles, and consumer satisfaction and customer loyalty have a significant effect on repurchase intention.
Keyword: country of origin, ethnocentrisme, instant noodles attribute, repurchase intention

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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