Judul: Term Joint-Life Insurance Annual Premiums for Three People with Variation of Interest Rates and Benefits
Abstrak: Salah satu faktor yang memengaruhi perhitungan premi adalah suku bunga. Pada dunia nyata suku bunga dapat bergerak naik, turun, maupun konstan. Penulisan karya ilmiah ini bertujuan untuk melihat perbandingan harga premi asuransi jiwa joint-life berjangka untuk kasus tiga orang dengan variasi suku bunga naik, turun, dan konstan serta variasi manfaat. Asuransi jiwa dengan status joint-life merupakan salah satu jenis asuransi multi-life yang mana kegagalannya ditentukan pada saat kegagalan pertama dari salah satu tertanggung. Status joint-life digunakan dalam penentuan premi yang mana pembayaran premi tidak akan dibayarkan lagi ketika salah satu tertanggung mengalami kegagalan. Terdapat dua nilai manfaat. Manfaat pertama akan diberikan ketika salah satu tertanggung mengalami kegagalan dan manfaat kedua akan diberikan ketika sudah ada dua tertanggung yang gagal., One of the factors that influence premium calculation is the interest rate. In the real world, interests rate can go up, down, or be constant. The aim of this scientific paper is to look at the comparison of term joint-life insurance premiums for the case of three people with varying interest rates up, down, and constant; and various benefits. Life insurance with joint-life status is a type of multi-life insurance, which means the failure is determined at the first failure of one of the insureds. Joint-life status is used in determining premiums where premium payments will not be paid again when one of the insureds fails. There are two benefits. The first benefit will be given when one of the insureds fails, and the second benefit will be given when two insureds have failed.
Keyword: interest rates, joint-life insurance, premium

Judul: Determination of Premium and Reserve Benefits of Term Life Insurance for Three Insureds with Combined Joint Life and Last Survivor Status
Abstrak: Asuransi jiwa berjangka adalah pertanggungan atas risiko meninggalnya peserta asuransi dalam jangka waktu tertentu. Asuransi jiwa multi life dengan status joint life memberikan santunan saat kematian pertama pada kelompok peserta, sedangkan status last survivor memberikan santunan saat kematian terakhir pada kelompok peserta. Karya ilmiah ini membahas tentang penentuan peluang kegagalan status, premi bersih tahunan, dan cadangan manfaat asuransi dengan menggunakan metode prospektif pada asuransi jiwa berjangka untuk suami, istri, dan anak laki-laki dengan status joint life antara anak laki-laki dengan status last survivor pasangan suami istri. Perhitungan dilakukan dengan beberapa skenario berdasarkan usia mulai asuransi dan masa pertanggungan. Hasil penelitian menunjukkan bahwa peluang kegagalan status menurun ketika anak masih sangat muda dan meningkat setelahnya. Besar premi bersih tahunan menurun untuk beberapa skenario dengan usia awal termuda dan meningkat setelahnya. Nilai cadangan pada awal dan akhir kontrak bernilai nol, namun beberapa skenario memiliki cadangan negatif., Term life insurance is coverage for the risk of death of insurance participants within a certain period of time. Multi life insurance with joint life status provides compensation at the first death of the group of participants, while the last survivor status provides compensation at the last death of the group of participants. This scientific work discusses the determination of failure probability, annual net premium, and insurance benefit reserve using the prospective method in term life insurance for husband, wife, and son with joint life status between son and last survivor status of husband and wife. The calculation is done with several scenarios based on the starting age of insurance and the coverage period. The results show that the probability of failure status decreases when the child is very young and increases thereafter. The annual net premium decreases for scenarios with the youngest starting age and increases thereafter. The reserve value at the beginning and end of the contract is zero, but some scenarios have negative reserves.
Keyword: combined joint life and last survivor, insurance, premium, reserves

Judul: Identifikasi Isolat Bakteri Tahan Krom(VI) dan Pengujian Aktivitas Enzim Krom(VI) Reduktase
Abstrak: Cr(VI) (chromate) is a toxic, soluble environmental contaminant. A Gram-negative, Cr(VI)-resistant bacterium, has been isolated from effluent of electroplating wastewater treatment reactor. This strain had maximum identity value as high as 96% to Ralstonia pickettii and Ralstonia sp. M2S3. This value indicated that the strain was a species of Ralstonia genera. Because of this reason, the strain was designated as Ralstonia sp. Cr6NS. Ralstonia sp. Cr6NS was able to grow aerobically in 250 ppm Cr(VI) and had Cr(VI) reducing-capacity as high as 4,11 x 10-8μg Cr(VI)/hour/cell. From the study of enzymatic activity, Ralstonia sp. Cr6NS showed the activity of Cr(VI)-reductase both in periplasmic and sitoplasmic content. The highest activity was found in periplasmic matrix. However, the strain seemed not secreting this enzyme to the external medium.
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