Judul: Nutrient management knowledge base development of red chili (Capsicum annum L.) in the tropic reagion based 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
Keyword: 

Judul: Application Development of Determination of Organic and Inorganic Fertilizing Doses on Red Chili (Capsiccum annuum L.) plants based on Android Offline
Abstrak: Pupuk adalah salah satu faktor penting pada budidaya tanaman untuk menentukan jumlah hasil panen. Aplikasi pupuk organik dapat digunakan ke berbagai tanaman hortikultura seperti pada cabai merah. Cabai merah organik memiliki nilai lebih tinggi di mata masyarakat karena dibudidayakan secara organik dan dapat dijual dengan harga lebih tinggi. Aplikasi pemupukan cabai berbasis Android ini digunakan untuk mengelola penggunaan pupuk organik maupun anorganik berdasarkan jenis tanah dan kondisi kesuburan tanah serta menghitung kebutuhan kapur berdasarkan tingkat keasaman tanah. Aplikasi ini dapat berjalan secara offline sehingga tidak memerlukan koneksi internet setelah aplikasi di instal. Aplikasi ini dibangun menggunakan bahasa C# dalam platform Xamarin yang disediakan dalam program Visual Studio., Fertilizer is one of the crucial factor in determining the quantity of harvest in cultivation. Application of organic fertilizer can be used in a variety of crops like in red chili. Organic red chili have a higher value in the public eyes and can be sold at a higher price. The purpose of Android-based chili fertilizer application is to manage the use of organic and inorganic fertilizer based on the type of soil and soil fertility condition while also able to calculate calcification requirement based on the level of acidity. This application can be operated while offline, therefor it doesn’t require an internet connection after the application is installed. This application is built using C# language in Xamarin platform provided in Visual Studio program.
Keyword: Android, Cabai, Pupuk, chilli, fertilizer, inorganic, offline, organic

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular