Judul: Pengembangan Sistem Pakar Agribisnis Cabai (Capsicum annuum. L) Berbasis Android
Abstrak: The objective of the research was to develop a consultation system for Chili Pepper (Capsicum annuum. L) agribusiness based on android. The method included problem identification, the search knowledge sources, knowledge acquisition, knowledge representation and consultation system development based on android. Knowledge from the expert and other’s materials has been captured and represented to develop the system. The system development was done by using extreme programming (XP) which included the stages of analysis, design and implementation. The results of this research is a chili pepper agribusiness expert system based on android which consists of nine consultation modules like choosing the best cultivar, fertilizing recommendation, land preparation, identified disease, controlling insect pest, farmers income and profit gain, after harvest’s technique, government policy, and price information based on user’s location. The system was running well on the android phone. Users can download the application from http://apps.cs.ipb.ac.id or http://appsriset.ipb.ac.id as a mirror link, then install it on their smartphone or computer tablet .
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Judul: Online chili (Capsicum annuum. L) agribusiness consultation based on mobile system
Abstrak: A mobile based Chili online agribusiness consultation system is a consultation system which serves the information and knowledge for farmers and stake holder involved in chili Agribusiness so they can access all needed information in processing, marketing, and developing their agricultural products by using mobile device such as: hand phone, PDA that have GPRS (General Packet Radio Services). The purpose of the research is to make the farmers as direct independent users in getting the information, by using information technology, so the mobile device it can be communication media and knowledge based consultation devices. The developing of mobile based consultation system is for supporting the activities of Agribusiness that include market information, weather information, and government policy about the farm production result that will be observed to give solution for Agribusiness doers, especially for the chili farmers in consulting all information needed to develop the result of Agriculture. This system is built by using System Development Life Cycle (SDLC) approach. It is an adaptive extreme Programming which is one of Agile’s methodologies that consist of explorating, planning, iteration launching software. The source of knowledge is gotten from the experts, police makers, customer, research institution, University, and from books, research journals, bulletin, and online information system.
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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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