Judul: Persepsi Petani Binaan ICDF terhadap Peranan Public Relation dalam Penerapan Budidaya dan Penanganan Pasca Panen Buah Jambu Kristal
Abstrak: Public relations (PR) is a process of mutual communication between the various parties, giving rise to mutual understanding and mutual trusting. International Coorporation and Development Fund (ICDF) used the PR’s role in the development and to make a good perception of the Crystal Guava fruit. This study aims to identify farmers' perceptions of the role of PR in the application of cultivation and post-harvest handling of Crystal Guava fruit and related factors, identify the knowledge of farmers on programs that do ICDF and related factors, as well as analyze the profile of Crystal Guava farmers in the Cikarawang’s village. As the results Crystal Guava farmers showed relatively a good perception of the PR’s role as informator and is quite good on the PR’s role as a facilitator and mediator, as well as factors related to farmers' knowledge of the ICDF program conducted training that includes knowledge of cultivation, provision of means of production, and post-harvest training. Knowledge of farmers on programs that do ICDF Crystal Guava farmers is quite high as well as related factors are age, income, farming experience, interaction with farmer groups.
Keyword: 

Judul: Perbandingan Analisis Kelayakan Usaha Jambu Kristal (Psidium guajava L.) Petani Mandiri dengan Petani Binaan ICDF Kabupaten Bogor
Abstrak: Kristal guava presents as popular primadona fruits. Nowdays, there is a gap between demand and production. This gap could be an opportunity to open kristal guava business. The purpose of this research is to compare feasibility analysis of kristal guava between independent farmer (Mr.Agus) and mentored farmer by ICDF (Mr.Badri). The research was conducted at Tangkil Village and Cikarawang Village. Is that ICDF bring a positive effect to the farmer. Data analysis method which is used on this research is qualitative analysis method to analyze feasibility based on non-financial aspect such as market aspect, technical aspect, management and legal aspect, and also sosial, economic, culture and environmental aspect. Quantitative analysis based on investment criteria and sensitivity analysis using switching value to analyze feasibility based on financial aspect. The result of this feasibility analysis shows that kristal guava cultivation is feasible to run. Based on the sensitivity analysis using a switching value.
Keyword: kristal guava, comparison feasibility

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: