Judul: Seleksi Teknologi Penangkapan Ikan Tongkol Yang Ramah Lingkungan Di Lempasing, Lampung
Abstrak: Pembangunan unit usaha perikanan yang berkelanjutan merupakan pembangunan yang tidak saja mengutamakan keuntungan pada masa kini, tetapi juga mempertimbangkan keberlanjutannya untuk masa yang akan datang. Pembangunan yang tidak memperhatikan lingkungan merupakan suatu hal yang tidak bijaksana. Perairan Lempasing terletak di Selatan Sumatera, serta berhubungan langsung dengan Samudra Hindia. Kegiatan penangkapan ikan di PPI Lempasing dilakukan dengan menggunakan berbagai jenis unit penangkapan, seperti jaring insang hanyut, payang, pukat cincin, jaring rampus, pancing tonda, bubu, lampara dasar, jaring dogol dan bagan. Alat tangkap yang digunakan dalam kegiatan penangkapn ikan tongkol adalah jaring insang hanyut, payang, pukat cincin dan pancing tonda.
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Judul: Alokasi unit penangkapan ikan pelangis kecil di Teluk Lampung
Abstrak: Perikanan bersifat terbuka, dimana nelayan atau perusahaan bebas untuk melakukan usaha penangkapan ikan, mendorong nelayan untuk menangkap ikan sebanyak mungkinsebelum didahului nelayan lainnya. Sebagai akibatnya, teIjadi penangkapan yang secara biologis berlebihan dan keuntungan usaha tidak lagi diperoleh. Agar sumberdaya ikan tetap lestari maka perlu dilakukan pengkajian besarnya stok sumberdaya ikan, yaitu dengan mengendalikan intensitas penangkapan hingga tercapainya pengusahaan yang secara ekonomi menguntungkan. Pengkajian stok ditujukan untuk memanfaatkan sumberdaya ikan secara optimal, yang berarti pula sebagai upaya tingkat pemanfaatan jangka panjang yang memberikan hasil tangkapan maksimum dalam bentuk bobot. Pengkajian stok yang banyak dilakukan biasanya menggunakan asumsi perhitungan stok tunggal dengan upaya penangkapan tunggal. Dalam kenyataannya sumberdaya perikanan tropik seperti Indonesia memiliki potensi perikanan yang berlimpah dan terdiri dari beragam spesies ikan (multi spesies) dengan pemanfaatan sumberdaya perikanan dicirikan oleh keragaman alat tangkap (multi gear). Bertolak dari kondisi tersebut maka perlu dicarikan alternatif model yang mampu menjawab nilai optimum dari masing-masing faktor produksi di daerah tropis. Pengambilan data dilakukan di Teluk Lampung selama kurun waktu dua bulan. Teluk Lampung sebagai sentra kegiatan usaha perikanan tangkap di Provinsi Lampung.
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Judul: The Effects of Variance of Interest rate to Variance of Annuity Future Values
Abstrak: Time value of money is a concept that refers to the difference of the value of money due to time difference. The value of money for present time would not be the same as the value of money in the future. The value of money for present time is called as Present Value (PV) of the money and the value of money for future time is called Future Value (FV) of the money. Determination the value of money, for present and future time, depends on the time and rate of return. The value of money is determined by several factors such as inflation, fluctuation of interest rates, and government policy in securities and taxation. Due to fluctuation of the value of money we need a FV formulation, it is useful for knowing whether an investment can be profitable or not, and this information is useful also in budget analysis. Annuity is defined as a series of payments made for a specific period. The payment, fixed or varied, can be made at the beginning or at the end of the period. Annuity paid at the beginning of the period is called annuity-due and annuity paid at the end of the period is called immediate annuity-certain. The accumulated value of the annuity after few years later is called as a final value or a future value. Burnecki et al. (2003) have discussed about the FV of a fixed-rate annuity in which payments are made according to the arithmetic or geometric series. They have also examined FV for annuities in which payments are made according to arithmetic or geometric series with random rates of interest. This paper examines FV for annuity-due in which payments are made according to arithmetic or geometric series with interest rates as a random variable, which is normal distribution ,  . Future value formula is expressed in recursive form. FV for annuity-due which payments are made according to the arithmetic or geometric series with random rates of interest is calculated by theoretical way and simulation way. The random rates of interest is denoted as k k i  i  , where k i an independent random variable; i is a constant and k  is a random variable which has normal distribution ,  . By using the determined parameters, a sequence of random rates of interest are generated for theoretical calculation. Meanwhile for the simulation, the random rates of interest is generated 1000 times for the simulation. The generated data give mean value, variance, and standard deviation. Moreover, error of mean value, variance, and standard deviation from the theoretical and simulation results are calculated. Error calculation uses Symmetric Mean Absolute Percentage Error (SMAPE). The smaller the value of SMAPE is the more accurate the simulation. The interest rate variances are varied from 0.000036 to 0.0001 to study the relationship between variance of rates of interest and variance of future value. The theoretical and simulation results show that when the variance of random rates of interest increases, then the variance of FV increases linearly. FV of the annuity-due in
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