Judul: Pengembangan Aplikasi Mobile Cross-Platform Budidaya Cabai Merah (Capsicum annuum L.)
Abstrak: Today there are many farmers are aware of the internet to search and obtain relevant information for their work using a mobile device. The development of information and mobile-based communication technologies has been accelerating, making the availability of various operating systems on mobile devices such as smartphones, tablets, and gadgets that make it difficult for users when the website that is accessible made only for particular platforms. This research aims to develop mobile application cultivation of red peppers that can be run on multiplatform (cross-platform) mobile devices. The research of this study is a mobile application that is able to adapt in variety of browser operating system on mobile device platforms with a screen resolution size different, using HTML5 and CSS3 techniques. Functional features which have been developed in the system include choosing the chili pepper variety, chili cultivation which includes determination of fertilizer dosage, pest and deasese handly, cultivation knowledge, post-harvest. Module outside of cultivation include farming bussiness analysis, forecasting weather, government policies, and chili pepper price information. Based on the compatibility test is in three native platform browsers (iOS, Android and Windows Phone) at the level of resolution of different screen sizes that can consistently run well.
Keyword: Bogor Agricultural University (IPB), red chilli, mobile application, cross-platform application

Judul: Pengembangan Basis Pengetahuan Manajemen Nutrisi Cabai Merah (Capsicum annuum L.) di Wilayah Tropika Berbasis Pertanian Teliti (Precision Farming)
Abstrak: Red chili (Capsicum annuum L.) is a strategic agricultural commodities grown in Indonesia. Cultivation of red chili generaly faces many constraints, such as cultivation techniques, pests and plant diseases, post-harvest handling, and fertilization. These constraints can occur because the average of a farmers have insufficient knowledge on cultivation best practices, particularly about fertilization for red chili. The objective of this research is to developed knowledge base of red chili nutrient management in tropical region based on precision farming. This research includes data and information collecting, knowledge acquisition, knowledge base repesentation, knowledge coding and testing. Finally prototype a application development was done to demonsrate the usability of knowledge based developed in this research. Knowledge aquisition was carried out by literature survey and expert interviews. In our system, knowledge is represented as decision trees/decision tables, and related data model. The main result of this research is the knowledge base of red chili nutrient management and cultivation that can be used for several application such as expert systems, decision support systems, and consultation systems for farmers, agroindustry, practitioners, or other agribusiness units. The specific result of the research is a knowledge about how to determine dosage of limestone/sulfur based of pH and texture, animal manure based of organic carbon, singular and compound fertilizers based on the amount of red chili nutrient requirement. The knowledge base system was implemented using PostgreSQL and the application prototype was built using PHP on web platform basis.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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