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: Faktor-Faktor yang Memengaruhi Etnosentrisme dan Perilaku Pembelian Produk Korea Selatan di Indonesia
Abstrak: Fenomena Korean Wave memberikan dampak pada etnosentrisme dan perilaku pembelian konsumen Indonesia. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang memengaruhi etnosentrisme dan perilaku pembelian pada produk Korea Selatan di Indonesia. Penelitian ini menggunakan mixed method. Penelitian kuantitatif dilakukan dengan teknik survei pada 348 responden menggunakan instrumen kuesioner. Penelitian kualitatif dilakukan pada 10 orang dengan in-depth interview dan observasi pada retail offline dan online. Analisis data deskriptif dan tabulasi silang menggunakan SPSS 25.0 serta analisis SEM menggunakan Lisrel 8.80. Temuan pada uji hubungan menunjukkan jenis kelamin memiliki hubungan dengan norma subjektif dan etnosentrisme. Jenis kelamin, usia, dan domisili memiliki hubungan dengan citra budaya. Usia dan pekerjaan memiliki hubungan dengan citra negara. Pekerjaan dan pengeluaran memiliki hubungan dengan patriotisme, serta jenis kelamin dan pengeluaran memiliki hubungan dengan perilaku pembelian. Hasil analisis SEM menunjukkan variabel etnosentrisme dipengaruhi oleh citra negara secara negatif signifikan dan patriotisme secara positif signifikan. Hasil analisis SEM juga menunjukkan variabel perilaku pembelian dipengaruhi oleh citra negara secara positif signifikan dan patriotisme serta etnosentrisme secara negatif signifikan. Hasil temuan tersebut dapat dimanfaatkan untuk meningkatkan etnosentrisme konsumen di Indonesia dan pembelian produk dalam negeri dengan dukungan masyarakat Indonesia melalui evaluasi produk yang disampaikan pada pebisnis lokal guna meningkatkan inovasi produk. Pebisnis lokal dapat bekerja sama dengan pemasok lokal dan mendapatkan dukungan dari pemerintah khususnya Kementerian Pariwisata dan Ekonomi Kreatif (Kemenparekraf) dengan menyediakan pelatihan dan pameran produk Indonesia, sehingga meningkatkan kepercayaan masyarakat Indonesia bahwa produk yang dihasilkan oleh pebisnis lokal Indonesia dapat bersaing dengan produk Korea Selatan maupun produk dari negara lain., The Korean Wave phenomenon impacts ethnocentrism and buying behavior of Indonesian consumers. This study analyzed the factors of ethnocentrism and buying behavior of South Korean products in Indonesia. This research used mixed methods. Quantitative research was conducted using a survey technique on 348 respondents with a questionnaire instrument. Qualitative research was conducted on 10 people with in-depth interviews and observations of offline and online retailers. Descriptive data analysis and cross-tabulation used SPSS 25.0 and SEM analysis used Lisrel 8.80. The results of the relationship showed that gender had a relationship with subjective norms and ethnocentrism. Gender, age, and domicile have a relationship with cultural image. Age and job have a relationship with country image. Job and expenditure are related to patriotism. Gender and expenditure are related to buying behavior. SEM analysis shows that ethnocentrism is significantly affected by country image and patriotism is significantly positive. SEM analysis also shows that purchasing behavior is significantly positive affected by country image, while patriotism and ethnocentrism are significantly negatively affected. These findings can be used to increase consumer ethnocentrism in Indonesia and purchase domestic products with support Indonesian people through product evaluations to local businesses to increase product innovation. Local businesses can work with local suppliers and get support from the government, especially the Ministry of Tourism and Creative Economy (Kemenparekraf), by providing training and exhibitions of Indonesian products, thereby increasing the confidence of Indonesian people that products produced by local Indonesian businesses can compete with South Korean products and from other countries.
Keyword: buying behavior, country image, ethnocentrism, korean wave, patriotism

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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