Judul: Analisis Gender pada Ketahanan Pangan Rumah Tangga Petani Agroforestri (Kasus: Desa Sukaluyu, Kecamatan Nanggung, Kabupaten Bogor, Jawa Barat)
Abstrak: Ketahanan pangan masih menjadi isu global yang mendapat perhatian serius dari berbagai negara internasional. Pertanian dengan sistem agroforestri dapat ditawarkan untuk mengatasi masalah pangan. Namun, permasalahan ketidaksetaraan gender dinilai dapat menjadi penyebab masalah kerawanan pangan. Penelitian ini bertujuan untuk memetakan ketahanan pangan rumah tangga petani agroforestri dan kaitannya dengan pengambilan keputusan rumah tangga serta peran pembagian peran dalam pengelolaan pangan rumah tangga petani agroforestri. Penelitian ini menggunakan metode survei dengan mengambil sampel 60 rumah tangga petani agroforestri di Desa Sukaluyu, Kecamatan Nanggung, Kabupaten Bogor, Jawa Barat. Data kuantitatif dikumpulkan dengan instrumen kuesioner dan didukung dengan data kualitatif melalui panduan wawancara mendalam. Hasil dari penelitian ini menemukan adanya hubungan positif antara pembagian peran gender dengan tipe pengambilan keputusan rumah tangga petani agroforestri. Hubungan positif juga ditemukan antara tipe pengambilan keputusan rumah tangga dalam menentukan alokasi lahan untuk budidaya dengan ketahanan pangan rumah tangga petani agroforestri., Food security is still a global issue that has received serious attention from various international countries. Agriculture with agroforestry systems offered to address the food problem. However, the problem of gender inequality is considered to be the cause of the problem of food insecurity. This study aims to map the household food security of agroforestry farmers and its correlation to household decision making and the role of division of roles in agroforestry farmer household food management. This study used a survey method by taking a sample of 60 agroforestry farmer households in Sukaluyu Village, Nanggung District, Bogor Regency, West Java. Quantitative data is collected with questionnaire instrument and supported by qualitative data through in-depth interview guides. The results of this study found a positive correlation between the division of gender roles and the type of household decision making for agroforestry farmers. The positive relationships were also found between the type of household decision making in determining the allocation of land for cultivation with household food security of agroforestry farmers.
Keyword: agroforestry, decision making, food security, gender, household

Judul: Analisis Gender dalam Ketahanan Pangan Rumah Tangga Petani Hutan Rakyat (Kasus Desa Bojonggenteng Kecamatan Jampangkulon Kabupaten Sukabumi)
Abstrak: Food security became a universal issue in the face of world food vulnerability. Private forests provide a solution by becoming one of the food providers. Accordingly, women and men hold different important role. Women manage the food, while men manage private forests. This study uses the Harvard Framework for analyzing the division of labor, access and control of gender, and the factors that influence it. The method used was a survey on private forest farmers of Bojonggenteng Village. The results showed the level of private forests contribution, education level, income level, and tenure level has a positive effect; the household size has negative effect; division of labor, access and control gender had no effect on household food security. Men dominate on productive activities and women dominate on reproductive activities. In the social activities, both of them tend to do it. Access to and control over resources and benefits aspects are different between men and women. Factors influencing include Sundanese culture and the Islamic religion
Keyword: food security, harvard framework, private forest, gender

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.
Keyword: