Judul: Studi terhadap Perencanaan Premi Optimal dengan Reinstatements pada Perusahaan Reasuransi.
Abstrak: Reinsurance is an underwrite all or a portion of the insurance risk. Insurer paid a number of premiums to reinsurer and that premiums would be income for reinsurer. Premium plan is very important for reinsurer facing risks of submitted claims. Premium plan in this paper is premium plan of reinsurance with reinstatement. This premium is not paid in the beginning of the contract, but it is paid when the loss of the reinsurer exceed maximum bound capacity of reinsurer. For illustration purpose, it is assumed that the reinsurer’s loss is satisfied a truncated exponential distribution. Reinsurance contract minimizes the expectation of square the difference between the total premium income and the loss of the reinsurance, therefore it is said to be optimal. Minimizing the expectation of square all over premium plans can be viewed as a credibility problems. Covariance matrix of the explanatory random variables of premium plan with reinstatement is invertible, so that the premium plan has a unique solution. Optimal premium plan are unbiased and nonnegative.
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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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Judul: Identifikasi Spesies Fabavirus Penyebab Penyakit Mosaik pada Tanaman Nilam
Abstrak: Survei di daerah Jawa Barat dilakukan untuk mendeteksi infeksi Fabavirus pada tanaman nilam (Pogostemon cablin Benth) dan untuk mengidentifikasi spesies virus berdasarkan sikuen nukleotidanya. Dari 25 sampel tanaman nilam yang menunjukkan gejala mosaik dan variasinya, dua sampel didapatkan dari Cicurug, Sukabumi dan dua lainnya berasal dari Gunun Bunder, Bogor positif diinfeksi oleh Fabavirus (dibuat dengan nama CG15 dan CG16 & GB27 dan GB29, berturut-turut) berdasarkan enzyme-linked immunosorbent assay (ELISA) menggunakan antiserum untuk Fabavirus. Keberadaan infeksi Fabavirus pada sampel tanaman nilam dikonfirmasi dengan uji molekuler melalui reverse transcription-polymerase chain reaction (RT-PCR) menggunakan primer untuk Fabavirus. Untuk menguraikan spesies dari isolat virus, produk RT-PCR CG16 dan GB29 disikuensing langsung tanpa kloning pada vektor plasmid. Sikuen terdiri dari sekitar 322 nukleotida, berdasarkan primer yang didesain [BBWVVSSP (5'-GTBTCDAGTGCTYTDGAAGG-3', B = C, G, or T; D = A, G, or T; Y = C ог T) and BBWVKMRM (5'- TDGWDCCATCVAGICKCATTTT-3', W = A or T; V = A, C, or G; I = Inosine; KG or T)]. Penjajaran sikuen nukleotida mengonfirmasi identitas dari isolat virus sebagai Broad bean wilt virus 2 (BBWV-2). Penelitian ini merupakan laporan pertama keberadaan BBWV-2 penyebab penyakit mosak pada tanaman nilam di Indonesia. Kata kunci: Nilam, Broad bean wilt virus 2.
Keyword: Nilam, Broad bean wilt virus 2