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 Socio-Institutional Factors on the Adoption of Teat Dipping Technology in Koperasi Peternak Sapi Cianjur Utara
Abstrak: Kontribusi subsektor peternakan dalam PDB sektor pertanian setiap tahunnya cukup tinggi dan berpengaruh terhadap pertumbuhan perekonomian nasional. Peningkatan konsumsi susu dalam memenuhi kebutuhan susu dalam negeri membuat peternak berupaya mengadopsi teknologi agar meningkatkan produksi dan kualitas susu. Tujuan dari penelitian ini menganalisis pengaruh faktor socio institutional terhadap adopsi teknologi celup puting yang dilakukan setelah pemerahan berfungsi untuk meningkatkan kualitas dan produksi susu sapi perah. Penelitian ini menggunakan metode analisis deskriptif dan regresi logistik yang diperoleh melalui wawancara dan kuesioner terdiri dari komponen adopsi teknologi, karakteristik sosial ekonomi serta socio-instutional pada aspek pelayanan kesehatan hewan, market orientation, stakeholder network yang didapatkan peternak dalam tiga tahun terakhir. Hasil analisis menujukkan karakteristik sosial ekonomi peternak mayoritas peternak berusia produktif, tingkat pendidikan SD, mengikuti pendidikan informal, memiliki anggota keluarga lebih besar dari tiga orang, memiliki hewan ternak lebih kecil sama dengan enam ekor, dan berpendapatan rendah. Pada analisis regresi logistik dalam faktor jumlah tanggungan keluarga, cara mengobati sapi ketika sakit, dan keterlibatan peternak dalam program pelatihan Indodairy berpengaruh positif dan signifikan sedangkan faktor usia peternak dan jumlah hewan ternak sapi perah berpengaruh negatif dan signifikan terhadap adopsi teknologi celup puting., The contribution of the livestock subsector to the GDP of the agricultural the sector is relatively high every year and affects the growth of the national economy. The increase in milk consumption in meeting domestic needs has made farmers adopt technology to increase milk production and quality. This study aimed to analyze socio-institutional factors that influence on adoption teat dipping technology after milking to improve dairy cows quality and milk production. This study uses descriptive analysis and logistic regression methods obtained through interviews and questionnaires consisting of components of technology adoption, social economic characteristics, socio-institutional aspects of animal health services, market orientation, and stakeholder network obtained by farmers in the last three years. The results of the analysis show that the social-economic characteristics of the farmers are most farmers of productive age, elementary school education level, attending informal education, having family members greater than three people, having livestock smaller than six, and having a low income. In the logistic regression analysis, the number of dependents in the family, how to treat cows when they were sick, and the involvement of farmers in the Indodairy training program had a positive and significant effect. Meanwhile, the age of the farmers and the number of dairy cattle had a negative and significant effect on the adoption of teat dipping technology.
Keyword: Technology Adoption, Logistic Regression, Dairy Cow, Socio-Institutional

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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