Judul: Penggunaan Teknologi Informasi dan Komunikasi Sebagai Sarana Edukasi Pertanian
Abstrak: Teknologi Informasi dan Komunikasi (TIK) telah memberikan dampak pada cara masyarakat berinteraksi dan membangun komunitas lewat jalan baru dalam memperoleh, menyimpan dan menyebarluaskan informasi kembali ke masyarakat. TIK dibutuhkan dalam berbagai bidang, salah satunya sebagai sarana edukasi. TIK melalui media sosial dengan mendukung konsep e-agribusiness atau e-business di bidang pertanian. Tujuan penelitian ini adalah menganalisis penggunaan TIK pada Kebun Kumara sebagai sarana edukasi pertanian. Penelitian ini menggunakan pendekatan kuantitatif menggunakan kuesioner online dan didukung data kualitatif melalui wawancara mendalam dengan diolahnya data menggunakan Microsoft Excel 2016 dan aplikasi IBM SPSS Statistics. Hasil penelitian menunjukkan bahwa karakteristik individu, lingkungan dan wilayah tidak memiliki hubungan dengan pola penggunaan TIK. Selain itu juga, perubahan perilaku dengan pola penggunaan TIK memiliki hubungan pada orang yang belum pernah datang ke Kebun Kumara. Pada orang yang sudah pernah datang ke Kebun Kumara tidak memiliki hubungan., Information and Communication Technology (ICT) has had an impact on the way people interact and build communities through new avenues of acquiring, storing and disseminating information back to society. ICT is needed in various fields, one of which is as a means of education. ICT through social media by supporting the concept of e agribusiness or e-business in agriculture. The purpose of this study is to analyze the use of ICT in Kumara Gardens as a means of agricultural education. The study used a quantitative approach using online questionnaires and supported qualitative data through in-depth interviews with data processing using Microsoft Excel 2016 and IBM SPSS Statistics applications. The results showed that individual, environmental and region characteristics had no association with ICT usage patterns. In addition, behavioral changes with ICT usage patterns have a relationship in people who have never come to Kumara Gardens. In people who have already come to Kumara Garden have no relationship.
Keyword: agricultural education, behavior changes, use of ICT

Judul: Use of Information and Communication Technology (ICT) and Digital Literacy of Farmers
Abstrak: Teknologi Informasi dan Komunikasi (TIK) memiliki kekuatan tersendiri dalam memberikan perubahan besar bagi perkembangan dunia. TIK dapat dimanfaatkan oleh semua bidang pekerjaan baik bidang pariwisata, pendidikan, kesehatan bahkan pertanian. Tujuan dari penelitian ini adalah menganalisis karakteristik penggunaan TIK untuk pertanian, menganalisis tingkat penggunaan TIK bagi para petani, menganalisis perkembangan usaha pertanian, menganalisis hubungan karakteristik individu dengan tingkat penggunaan TIK bagi para petani, dan menganalisis hubungan tingkat penggunaan TIK dengan perkembangan usaha. Metode yang digunakan dalam penelitian ini adalah metode survei dan didukung oleh data kualitatif dengan wawancara mendalam dan studi literatur. Hasil penelitian menunjukan beberapa karakteristik individu yang berbeda dengan penelitian sebelumnya. Intensitas penggunaan alat TIK petani termasuk dalam kategori sedang serta literasi digital petani termasuk dalam kategori tinggi. Perkembangan usaha pertanian menunjukan bahwa saat ini petani masih mengandalkan media konvensional untuk menjual hasil pertaniannya. Sementara itu terdapat hubungan antara karakteristik umur dengan tingkat penggunaan TIK. Akan tetapi tidak ada hubungan nyata antara tingkat penggunaan TIK dengan meningkatnya usaha pertanian., Information and Communication Technology (ICT) has the power to make major changes to the development of the world. ICT can be utilized by all fields of work, be it tourism, education, health, even agriculture. The purpose of this study is to analyze the characteristics of the use of ICT for agriculture, analyze the level of use of ICT for farmers, analyze the development of agricultural businesses, analyze the relationship between individual characteristics and the level of use of ICT for farmers. , and analyze the relationship between levels of ICT use and business development. The method used in this research is a survey method and is supported by qualitative data with in-depth interviews and literature study. The results showed several individual characteristics that were different from previous studies. The intensity of farmers' use of ICT tools is in the medium category and farmers' digital literacy is in the high category. The development of agricultural businesses shows that currently farmers still rely on conventional media to sell their agricultural products. Meanwhile, there is a relationship between age characteristics and the level of ICT use. However, there is no significant relationship between the level of ICT use and the increase in agricultural enterprises.
Keyword: agribusiness, digital literacy, ICT

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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