Judul: Karakterisasi Unsur Hara Pupuk Bokashi Residu Garam Rumput  Laut Menggunakan Mikroorganisme Lokal Bonggol Pisang
Abstrak: Keterbatasan bahan baku industri perkayuan mendorong pemanfaatan material berlignoselulosa, kelobot jagung sebagai bahan pengganti kayu, seperti papan partikel. Penelitian ini bertujuan mengetahui pengaruh variasi kerapatan dan ketebalan terhadap sifat fisik, mekanik, akustik, dan termal papan partikel dengan perekat campuran kitosan larut air dan asam sitrat 15%. Papan memiliki variasi kerapatan (0,6 dan 0,8 g/cm3) dan variasi ketebalan (3, 6, dan 9 mm). Ukuran partikel kelobot jagung 4-14 mesh. Papan berukuran 25×25 cm diproduksi menggunakan kempa panas dengan suhu 180°C dan tekanan 5 MPa (3 mm) dan 10 MPa (6 dan 9 mm) selama 15 menit. Hasil uji kerapatan sebesar 0,65-0,84 g/cm3, kadar air 3,14-13,04%, pengembangan tebal 59,08-113,92%, daya serap air 78,18180,74%, MOE 4029-7005 kgf/cm2, MOR 53-146 kgf/cm2, IB 0,71-6,67 kgf/cm2, SHP 42,34-103,44 kgf. Koefisien absorpsi suara (α) pada uji akustik sudah memenuhi standar ISO 11654 dan termasuk ke dalam kelas D untuk serapan normal. Papan partikel bersifat isolator panas dengan nilai KT 0,16-0,21 W/m.K. Uji wettability papan bersifat hidrofilik dengan sudut kontak 65°-89°. Variasi papan partikel kerapatan 0,8 g/cm3 dan ketebalan 6 mm menghasilkan kualitas terbaik sesuai standar SNI 03-2105-2006., Bokashi is an organic fertilizer produced from the fermentation of organic materials such as compost and manure using the help of decomposing microorganisms such as microbes or fermenting fungi. Local microorganisms (MOL) are microorganism that are used as starters in making solid organic fertilizer and liquid fertilizer. Banana weevils contain microbes that decompose organic matter. Brown seaweed salt residue as a basic ingredient for organic fertilizer contains macro nutrients. The residue can be mixed with other organic materials such as straw to increase the decomposition process. This research aims to determine the best concentration of brown seaweed salt residue to characterize the nutrients of bokashi fertilizer fermented using banana weevil mole based on testing N, P, K, C, water content and pH. This research method uses a Completely Randomized Design (CRD). The best concentration of added seaweed salt residue was obtained in the F3 treatment (53% RGRL, 10% husk, 3% bran, 34% MOL).
Keyword: bokashi, banana weevil, MOL, seaweed salt residue

Judul: Characteristics of Bokashi Fertilizer Residue Salt Seaweed Sargassum sp. Using Local Banana Peel Microorganisms
Abstrak: Residu garam rumput laut Sargassum sp. mengandung makro dan mikronutrien, hormon yang mendorong pertumbuhan, protein, dan vitamin. Salah satu pemanfaatan residu garam rumput laut Sargassum sp. bisa dijadikan sebagai bahan baku dalam pembuatan pupuk bokashi. Limbah kulit pisang uli memiliki potensi untuk dimanfaatkan sebagai bahan baku penumbuhan mikroorganisme lokal (MOL). Penelitian ini bertujuan menentukan konsentrasi terbaik residu garam rumput laut Sargassum sp. yang ditambahkan MOL kulit pisang uli pada pupuk bokashi. Penelitian dilakukan dengan penumbuhan mikroorganisme lokal, pembuatan pupuk bokashi, pengujian pH, C-Organik, N-Total, P2O5, K2O, kadar air, serta analisis data. Konsentrasi terbaik pada pupuk bokashi terdapat pada perlakuan F3 (Residu garam rumput laut Sargassum sp. 53%, sekam 10%, dedak 3%, dan MOL 34%) yang memiliki kandungan pH 8,14, C-Organik 38,25%, N-Total 1,17%, P2O5 0,25%, K2O 6,98%, dan kadar air 26,18%). Kandungan unsur hara pupuk bokashi residu garam rumput laut Sargassum sp. menggunakan mikroorganisme lokal kulit pisang uli memilki unsur hara yang cukup baik untuk tanaman., Seaweed salt residue Sargassum sp. contains macro and micronutrients, hormones that promote growth, protein and vitamins. One use of seaweed salt residue is Sargassum sp. can be used as raw material in making bokashi fertilizer. Uli banana peel waste has the potential to be used as raw material for growing local microorganisms (MOL). This study aims to determine the best concentration of seaweed salt residue Sargassum sp. MOL uli banana peel is added to bokashi fertilizer. The study was conducted by growing local microorganisms, making bokashi fertilizer, testing pH, C-Organic, N-Total, P2O5, K2O, water content, and data analysis. The best concentration of bokashi fertilizer is in the F3 treatment (Sargassum sp. seaweed salt residue 53%, 10% husk, 3% bran, and 34% MOL) which has a pH content of 8,14, C-Organic 38,25%, N-Total 1,17%, P2O5 0,25%, K2O 6,98%, and water content 26,18%). The nutrient content of bokashi fertilizer from Sargassum sp. seaweed salt residue using
Keyword: C-Organik, Fosfor, Hara, Kalium, MOL, dan Nitrogen

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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