Judul: Pendugaan Daerah Penangkapan Ikan Pelagis Kecil Berdasarkan Kandungan Klorofil-a dan Komposisi Hasil Tangkapan di Perairan Teluk Lampung
Abstrak: Keberhasilan kegiatan penangkapan ikan tentunya sangat dipengaruhi oleh kondisi dari daerah penangkapan ikan. Oleh karena itu, informasi mengenai daerah penangkapan ikan yang potensial sangat diperlukan oleh nelayan dalam kegiatan penangkapan ikan. Tujuan dari penelitian ini adalah menduga daerah penangkapan ikan pelagis kecil yang dominan tertangkap di Perairan Teluk Lampung. Daerah penangkapan ikan diduga dengan menggunakan tiga indikator, yaitu konsentrasi klorofil-a, catch per unit effort (CPUE) dan ukuran panjang hasil tangkapan. Daerah penangkapan ikan tongkol potensial berada di sekitar Pulau Condong, Kelagian, Legundi, Piabung, Tanjungputus dan Tegal. Daerah penangkapan ikan kembung potensial berada di sekitar Piabung. Daerah penangkapan ikan selar hijau potensial berada di sekitar Pulau Legundi.
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Judul: Variabilitas Suhu Permukaan Laut Kaitannya dengan Daerah Penangkapan Ikan Pelagis Kecil di Perairan Teluk Lampung
Abstrak: Informasi mengenai daerah penangkapan ikan potensial sangat penting dalam kesuksesan operasi penangkapan ikan. Daerah penan gkapan ikan dipengaruhi oleh faktor oseanografi salah satunya suhu permukaan laut (SPL). Suhu permukaan laut di Teluk Lampung hasil pengukuran satelit dan hasil tangkapan tongkol, kembung dan teri di PPI Lempasing digunakan untuk menduga daerah penangkapan potensial. Sebaran SPL di perairan Teluk Lampung pada bulan Juli 2012 malam hari berkisaran 27.22- 28.91⁰C (s2 =0.4), sedangkan siang hari berkisaran 27.99-30.16⁰C (s2 =0.3). Hasil tangkapan yang didaratkan di PPI Lempasing cukup beragam yang didominasi oleh ikan tongkol (41%), teri (22.9%) dan kembung (12.2%). Ikan tongkol dominan tertangkap pada ukuran 21.0 -27.0 cm (32.10%), kembung 16.8- 20.1 cm (57.5%). Suhu permukaan laut dengan hasil tangkapan tidak menunjukkan hubungan yang signifikan. Daerah penangkapan potensial pada bulan Juli 2012 untuk ikan tongkol terdapat di perairan Condong, Kelagian, Legundi, Puhawang, Tanjung Putus dan Tegal, untuk ikan kembung terdapat di Kelagian dan ikan teri terdapat di sekitar pulau Condong dan Kelagian.
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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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