Judul: Penghitungan Premi dengan Menggunakan Model Kredibilitas Buhlmann dan Buhlmann-Straub
Abstrak: Model kredibilitas merupakan salah satu metode untuk menghitung premi yang akan dibayarkan peserta asuransi kepada perusahaan asuransi menggunakan data klaim sebelumnya dari peserta asuransi. Pada karya ilmiah ini, premi peserta asuransi dihitung menggunakan model kredibilitas Buhlmann dan Buhlmann- Straub. Pada model Buhlmann, data klaim peserta asuransi yang dimiliki perusahaan asuransi diketahui untuk satu peserta asuransi, model Buhlmann- Straub digunakan saat data klaim setiap kelompok peserta asuransi memiliki keragaman jumlah individu. Premi dari peserta asuransi private motor insurance Central Bank of Ireland dihitung berdasarkan model kredibilitas Buhlmann dan premi dari kelompok peserta asuransi Social Security Disability Insurance the United States Social Security Administration dihitung berdasarkan model kredibilitas Buhlmann-Straub. Penghitungan premi dengan kedua model kredibilitas tersebut memerlukan pendugaan non parametrik untuk memperoleh penduga takbias bagi nilai harapan hypothetical mean, nilai harapan process variance, dan ragam hypothetical mean untuk mendapatkan faktor kredibilitas sehingga didapatkan premi tahun berikutnya.
Keyword: kredibilitas, model Buhlmann, model Buhlmann-Straub

Judul: Penentuan Faktor Kredibilitas Premi Asuransi Menggunakan Teori Kredibilitas
Abstrak: Karya ilmiah ini membahas penentuan faktor kredibilitas, atau yang diketahui sebagai pembobot, dalam menentukan premi asuransi dengan menggunakan Teori Kredibilitas. Dijelaskan sebanyak tiga model untuk menduga hasil pembobot tersebut, yaitu Model Poisson-Gamma, Model Normal dan Model Buhlmann. Dengan penentuan pembobot tersebut, perusahaan asuransi dapat lebih mudah menentukan premi pada pihak tertanggung berdasarkan pengelompokan tingkat risiko yang hampir sama. Tertanggung dengan risiko yang tinggi dikelompokkan menjadi satu kelompok dengan pembayaran premi yang besar, begitu pula pihak tertanggung dengan risiko rendah dikelompokkan menjadi satu kelompok dengan pembayaran premi yang rendah. Dengan metode seperti ini diharapkan pihak tertanggung merasa adil dalam pembayaran premi sesuai dengan tingkat risiko yang mungkin akan diderita.
Keyword: Credibility Theory, Poisson-Gamma Model, Normal Model, Buhlmann Model

Judul: Drought Stress Tolerance Mechanisms of Eggplant (Solanum spp.): Physiology and Molecular.
Abstrak: Eggplant (Solanum melongena L.) is a popular and economically important vegetable crop grown in the tropics and subtropics, especially in Asia and Africa. Most of these crops grown in Asia and Africa are tolerant to biotic and abiotic stresses. Eggplant has a wide variation in morphological and physiological characteristics, therefore, it is necessary to explore the germplasm to gain more genotypes tolerant to biotic and abiotic stresses. Sufficient water availability at the first stage of plant growth is very important. Limited water supply may lead to drought stress. The long period of drought stress may disturb the metabolic process and lead the irreversible damage of the plant tissues, so the plant can not recover. This abiotic stress has been significantly proved to be one of factors decreasing the plant growth and productivity. The objective of this research was to reveal physiological and molecular response of six eggplant accessions (i.e. 098, 155, 414, 754, 772, and 827 accessions, and Panjalu-F1 as the control genotype) to drought stress. Plants were grown in medium containing soil, sand and compost (1:1:1, v/v/v) in the greenhouse. Plants were exposed to the drought treatment at 21 days after the plants have 6 fully leaves. Some parameters were examined during the drought treatment, which were media water content (MWC), relative water content (RWC), plant growth and dry weight, proline concentration, chlorophyll content and polyamine concentration. Total RNA was extracted from leaves on day 21st of the treatment. The arginine decarboxylase S. melongena (SmADC) fragment gene was amplified from the cDNA. ADC gene is one of genes involved in polyamine biosynthesis and plays important role in the plant tolerance mechanism to drought stress. The results showed that drought stress significantly reduced plant height, leaf area, stomatal density and aperture in all plants. Levels of chlorophylls were similar during the drought treatment in all plants. Proline and/or polyamines were accumulated and reached the maximum levels after 14 to 21 days after the treatment. High levels of these amines can be used to indicate that the plant is stressed by drought. Levels of proline and polyamines, especially putrescine, increased 10 times higher in the stressed-plants compared to those grown in the optimum condition. cDNA was synthesized from the total RNA by reverse transcription. In total, four fragments of SmADC were obtained by PCR from cDNA of accession 098 (2 fragments), cDNA of accession 772 (1 fragment) and genomic DNA of accession 098 (1 fragment). ADC primers were designed based on the conserved regions in ADC Solanum lycopersicum (accession number HM629957.1). Sequences analysis showed that the four SmADC fragments were 1 442 bp, 1 422 bp, 1 407 bp and 636 bp, encoding 151, 357, 466, 182 amino acids, respectively. Nucleotide alignment analysis showed that four SmADC fragments were 86-93 % homologue to Solanum lycopersicum (Acc: NM_001247720.1), Datura stramonium (Acc: AJ251898.1), Capsicum annuum (Acc: AY156514.1) and Nicotiana tabacum (Acc: AF321137.1). Based on the phylogenetic tree developed from the deduced amino acid sequence of ADC, SmADCs were grouped with Solanum lycopersicum, Datura stramonium, Capsicum annuum and Nicotiana tabacum. Analysis of conserved domains revealed that
Keyword: eggplant, proline, polyamine, arginine decarboxylase (ADC), pyridoxal 5-phosphate (PLP)