Judul: Adoption of E-Commerce in Marketing Agricultural Products Among Farmers (Case: Sweet Potato Farmers in Cikarawang Village, Dramaga, Bogor District)
Abstrak: E-commerce mendukung dan mempermudah petani dalam memasarkan produk pertanian. Namun demikian, tidak banyak petani yang memanfaatkan e-commerce dalam usahataninya. Penelitian ini mendalami faktor penentu adopsi e-commerce di kalangan petani ubi jalar di Desa Cikarawang, Dramaga, Bogor. Lebih spesifik, penelitian ini mendalami keterkaitan antara karakteristik petani dan persepsi terhadap keputusan adopsi e-commerce tersebut. Untuk itu, penelitian ini menggunakan metode mixed method, yaitu kombinasi pengumpulan data kuantitatif dan kualitatif. Teknik simple random sampling digunakan dalam memilih responden (40 petani ubi jalar) untuk dilakukan wawancara terstruktur. Sementara itu, informan dipilih secara sengaja berdasarkan pemahaman mereka tentang adopsi e-commerce di kalangan petani ubi jalar. Meskipun persepsi petani terhadap e-commerce pada umumnya positif, namun regresi logit mendapatkan hanya petani yang berumur muda yang berpeluang mengadopsi e-commerce. Hal ini terkait dengan kerumitan e-commerce sehingga kurang menarik bagi mereka yang berusia lanjut. ADRIANSYAH NUR FAKHRI. Adopsi E-Commerce Pemasaran Produk Pertanian di Kalangan Petani (Kasus: Petani Ubi Jalar di Desa Cikarawang, Kecamatan Dramaga, Kabupaten Bogor). Dibimbing oleh IMAN K NAWIREJA. E-commerce mendukung dan mempermudah petani dalam memasarkan produk pertanian. Namun demikian, tidak banyak petani yang memanfaatkan e-commerce dalam usahataninya. Penelitian ini mendalami faktor penentu adopsi e-commerce di kalangan petani ubi jalar di Desa Cikarawang, Dramaga, Bogor. Lebih spesifik, penelitian ini mendalami keterkaitan antara karakteristik petani dan persepsi terhadap keputusan adopsi e-commerce tersebut. Untuk itu, penelitian ini menggunakan metode mixed method, yaitu kombinasi pengumpulan data kuantitatif dan kualitatif. Teknik simple random sampling digunakan dalam memilih responden (40 petani ubi jalar) untuk dilakukan wawancara terstruktur. Sementara itu, informan dipilih secara sengaja berdasarkan pemahaman mereka tentang adopsi e-commerce di kalangan petani ubi jalar. Meskipun persepsi petani terhadap e-commerce pada umumnya positif, namun regresi logit mendapatkan hanya petani yang berumur muda yang berpeluang mengadopsi e-commerce. Hal ini terkait dengan kerumitan e-commerce sehingga kurang menarik bagi mereka yang berusia lanjut., E-Commerce supports and facilitates farmers in marketing agricultural products. However, not many farmers use e-commerce in their farming. This study explores the determinants of e-commerce adoption among sweet potato farmers in Cikarawang Village, Dramaga, Bogor. Specifically, this study explores the relationship between farmer characteristics and perceptions of e-commerce to the adoption decision. For this purpose, this research used a mixed method, a combination of quantitative and qualitative data collection. Simple random sampling was used to select respondents (40 sweet potato farmers) for a structured interview. Meanwhile, informants were selected deliberately based on their understanding of the e-commerce adoption among sweet potato farmers. Although farmers generally have positive perceptions of e-commerce, the logit regression indicates that adoption of e-commerce is more likely among younger farmers. This can be attributed to the complexity of e-commerce, which makes it less appealing to older farmers.
Keyword: sweet potato farmers, Cikarawang Village, e-commerce adoption

Judul: Accelerating the Digitalization of Indonesian MSMEs Through E-Commerce Adoption: Analysis of Socio-Economic Determinants
Abstrak: Studi ini mengkaji faktor-faktor yang berperan dalam pemanfaatan e-commerce, dengan fokus khusus pada dimensi sosial-ekonomi. Data survei yang dikumpulkan dari Survei Sosial Ekonomi Nasional (Susenas) 2021 digunakan sebagai dasar analisis, dengan penerapan metode regresi logistik. Pendekatan ini bertujuan untuk mengidentifikasi dampak dari variabel-variabel seperti jenis kelamin, pendapatan, dan pendidikan, terhadap adopsi e-commerce. Hasil penelitian menunjukkan adanya hubungan antara penjualan online dan aktivitas pembelian. Mereka yang terlibat dalam penjualan online, termasuk UMKM, cenderung juga melakukan pembelian online untuk kebutuhan pribadi sebanyak 62,80 persen. Sebaliknya, kecenderungan untuk tidak melakukan pembelian secara online mencapai 92,40 persen dari responden yang tidak terlibat dalam penjualan online. Faktor-faktor seperti jenis kelamin, status pernikahan, usia, kegiatan utama, pendapatan, ukuran keluarga, penggunaan telepon genggam, akses internet dan keuangan, tempat tinggal, dan perilaku penjualan serta pembelian online memengaruhi keputusan untuk melakukan adopsi e-commerce. Implikasi dari temuan ini diuraikan untuk memandu para pelaku industri dan pembuat kebijakan untuk mengoptimalkan penetrasi dan adopsi e-commerce di masyarakat., This study examines the factors that play a role in e-commerce utilization, with a particular focus on socio-economic dimensions. Survey data collected from the 2021 National Socio-Economic Survey (Susenas) is used as the basis of analysis, with the application of the logistic regression method. This approach aims to identify the impact of variables such as gender, income, and education, on e-commerce adoption. The results show a relationship between online sales and purchasing activities. Those who engage in online sales, including MSMEs, tend to also make online purchases for personal needs as much as 62,80 percent. In contrast, the tendency not to make online purchases reached 92,40 percent of respondents who were not involved in online sales. Factors such as gender, marital status, age, main activity, income, family size, mobile phone usage, internet access and finance, place of residence, and online selling and purchasing behavior influence the decision to adopt e-commerce. The implications of these findings are outlined to guide industry players and policy makers to optimize e-commerce penetration and adoption in society.
Keyword: UMKM, E-commerce, Logit

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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