Judul: Ecological Factors on the Adoption Rate of High Quality Feed Technology in the Dairy Cattle Farmer Cooperative North Cianjur
Abstrak: Kebutuhan konsumsi susu segar nasional terus mengalami peningkatan dalam sepuluh tahun terakhir, tetapi produksi susu dalam negeri masih belum mampu memenuhi kebutuhan susu nasional, sehingga masih bergantung kepada produksi impor. Ini merupakan permasalahan yang perlu diatasi untuk melakukan peningkatan pada peternakan sapi perah di Indonesia. Adopsi teknologi pakan kualitas tinggi adalah upaya untuk dapat meningkatkan produksi susu nasional. Penelitian ini bertujuan untuk menganalisis karakteristik sosial ekonomi peternak di koperasi sapi perah Cianjur Utara dan faktor ekologi yang memengaruhi keputusan adopsi teknologi pakan kualitas tinggi. Metode analisis yang digunakan dalam penelitian ini adalah analisis deskriptif dan analisis regresi logistik yang dibantu software Stata 15, data diperoleh melalui wawancara langsung dengan bantuan kuesioner terstruktur dari 71 responden. Hasil penelitian menunjukkan terdapat enam faktor yang signifikan terhadap keputusan adopsi, yaitu: usia, pendapatan sedang, pendapatan tinggi, musim hujan panjang, pengolahan lahan, dan penyakit pada tanaman. Berdasarkan keenam faktor tersebut hanya usia yang signifikan negatif, sementara kelima faktor lain berdampak signifikan positif., The need for national fresh milk has continued to increase in the last ten years. However, domestic milk production can still not meet the national demand for milk, so it is still dependent on imported products. This problem needs to be addressed to improve dairy farming in Indonesia. Adopting high-quality feed technology is an effort to increase national milk production. This study aims to analyze the socio-economic characteristics of farmers in the Northern Cianjur dairy cow cooperative and the ecological factors influencing the decision to adopt high- quality feed technology. The analytical method used in this study is descriptive analysis and logistic regression analysis assisted by Stata 15 software, data obtained through direct interviews with the help of structured questionnaires from 71 respondents. The results showed that six factors were significant to the adoption decision: age, medium income, high income, long rainy season, tillage, and plant diseases. Only age was significantly negative based on these six factors, while the other five factors had a significant positive impact.
Keyword: Adopsi Teknologi, Ekologi, Pakan Kualitas Tinggi, Sapi Perah

Judul: The Effect of Government Support Program on The Adoption of Improved Feed Technology in Koperasi Peternak Sapi Cianjur Utara
Abstrak: Peranan subsektor peternakan dalam PDB tahun 2021 memberikan kontribusi positif sebesar 1,58 persen dengan pertumbuhan sebesar 0,34 persen (yoy) bagi perekonomian nasional. Peningkatan konsumsi susu dalam memenuhi kebutuhan susu dalam negeri dapat meningkatkan jumlah impor susu di Indonesia. Ketergantungan terhadap impor mendorong pemerintah melakukan upaya pengembangan usaha dengan kebijakan yang membantu peternak mengadopsi teknologi. Penggunaan teknologi pakan kualitas tinggi dapat meningkatkan produksi serta kualitas susu. Penelitian ini bertujuan menganalisis pengaruh program bantuan pemerintah terhadap adopsi teknologi pakan kualitas tinggi di KPS Cianjur Utara. Penelitian ini menggunakan metode analisis deskriptif, regresi logistik dan data primer yang diperoleh dengan wawancara dan kuesioner terdiri dari komponen adopsi teknologi, karakteristik sosial ekonomi, program bantuan pemerintah yang diakses peternak dari tahun 2019 hingga 2022. Hasil penelitian ini menunjukkan karakteristik peternak dalam kategori umur produktif, sebagian besar tamatan SD, peternak turut aktif dalam pendidikan informal, jumlah tanggungan lebih besar, jumlah sapi yang dimiliki kategori skala usaha kecil, luas kandang yang dimiliki sempit, peternak mendapatkan hijauan dari menanam sendiri dan pendapatan dalam kategori tinggi. Faktor tanggungan keluarga, sumber hijauan, program bantuan sapi, skema bantuan kredit dan kemudahan akses bantuan berpengaruh positif dan signifikan sementara faktor lahan kandang dan frekuensi bantuan berpengaruh negatif dan siginfikan terhadap adopsi teknologi., The role of the livestock subsector in GDP in 2021 contributed positively by 1.58 persen with growth of 0.34 persen (yoy) to the national economy. Theincrease in milk consumption in meeting domestic milk needs can increase the number of impor milk in Indonesia. Dependence on imports encourages the government to make efforts to develop dairy businesses with government policies that help farmers adopt technology to increase milk production. This study analyses the government support program's effect on adopting improved feed technology in the KPS Cianjur Utara. The method used is descriptive analysis, logistic regression and primary data obtained by interviews and questionnaires accessed by farmers from 2019-2022. The results of this study showed that farmers in the productive age category, primarily elementary school, actively participated in informal education, the number of dependents and the number of cows were more significant, the area of the stalled land was narrow, and forage food sourced from self-growing, and income was high. Factors of family dependents, forage sources, cattle support programs, credit support schemes and Support frequency has positive and significant. While the area of stall land and the frequency of government support have a negative and significant impact on technology adoption.
Keyword: Government Support, Improved Feed, Logistic Regression, Technology Adoption

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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