Judul: Visualisasi Kemiripan Karakteristik Antarvarietas Kedelai Menggunakan Algoritme Force Atlas
Abstrak: Information about characteristics of soybean is needed, especially in plant breeding so that the results will not produce similar varieties. However, the information is currently available in the form of text. It would be easier to use graphical visualization to find varieties that have similar characteristics, such as seed color and flower color. Hence, information visualization is required to aid user in understanding the information displayed. This study created a web-based interactive graph that represents soybean varieties with similar characteristics. The edges weights of 0.750 to 0.967 indicates similarity. This research used Force Atlas algorithm that can generate a clustering graph based on connectedness. Three clusters were formed based on the color of soybean. Soybean varieties were represented by nodes and the similarity of soybean characteristics were represented by edges. The larger the size of nodes, the more soybean that have similar characteristics.
Keyword: Bogor Agricultural University (IPB), soybean characteristic similarity, soybean, graph visualization, force atlas

Judul: Visualisasi Silsilah Varietas Kedelai Menggunakan Algoritme Directed Acyclic Graph
Abstrak: The pedigree data of soybean varieties in Indonesia is still difficult to be traced. Soybean varieties genealogy is useful in recognizing the lineage of soybean varieties. It can simplify the process of determining varieties that will be used for soybean breeding. Graph based information visualization is used to represent the pedigree varieties. 121 varieties of soybean are represented by nodes. Moreover the relationship between varieties are represented by edges. A variety that produces many offspring is represented by size of node, while the plant breeding methods are represented by colors. This research applies Directed Acyclic Graph algorithm to clarify the form of the graph visualization by forming the edges to always point downwards. The visualization is implemented in a web based application where users can interact and explore the pedigree data to gain knowledge about soybean varieties pedigree.
Keyword: directed acyclic graph., soybean varieties pedigree, information visualization

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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