Judul: Rancang-bangun Jaring Sirang (Bottom Gillnet) di Kecamatan Cilacap Selatan, Kabupaten Cilacap, Jawa Tengah
Abstrak: Alat tangkap jaring sirang (bottom gillnet) banyak digunakan oleh nelayan di Kecamatan Cilacap Selatan yaitu jaring sirang nilon terbuat dari nylon multifilament dan jaring sirang plastik terbuat dari nylon monofilament. Konstruksi jaring sirang nilon dan jaring plastik adalah sama, yaitu terdiri atas pelampung, tali pelampung, tali ris atas, srampad, badan jaring, tali ris bawah, pemberat, tali pemberat dan jangkar. Hang in ratio untuk jaring sirang nilon (nylon multifilament)berkisar 0.1-0.54 nilainya sudah tepat karena ikan tertangkap secara terpintal. Hang in ratio jaring plastik ( nylon multifilament) berkisar 0.48-0.66 nilainya terlalu besar karena dapat menyebabkan sasaran tangkapan mudah lolos.
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Judul: Aspek bio-teknik jaring rajungan di karangantu kabupaten serang, provinsi Banten
Abstrak: penelitian ini bertujuan membuat dokumentasi tentang teknologi dan alat tangkap jaring rajungan, serta pengoperasiannya dan menentukan komposisi hasil tangkapan jaring rajungan. Hasil penelitian ini diharapkan dapat menambah wacana penulis tentang unit penangkapan jaring rajungan. Pengambilan data di lapangan sudah dilaksanakan pada Bulan Juni sampai Juli 2002. Penelitian dilakukan di PPI Karangantu yang terletak di kawasan muara Sungai Kali Cenkok, meliputi areal kira-kira 2,5 ha. Penelitian ini merupakan studi kasus. Data primer diperoleh melalui wawancara dengan pihak terkait dan mengikuti kegiatan operasi penangkapan rajungan, meliputi data rajungan tentang panjang, lebar, berat dan jenis kelamin, daerah penangkapan rajungan dan komposisi hasil tangkapan. Data sekunder diperoleh dari instansi terkait dan meliputi data produksi rajungan di PPI Karangantu lima tahun terakhir dan data statistik dari instansi terkait lima tahun terakhir. Analisis data yang diperoleh dilakukan menggunakan rumus matematika sederhana, kemudian dideskripsikan untuk memberikan gambaran tentang usaha pemanfaatan sumberdaya rajungan menggunakan jaring rajungan. Hal ini ditinjau dari aspek biologi dan teknik. Berdasarkan cara pengoperasiannya, jaring rajungan dapat diklasifikasikan ke dalam jaring insang dasar (set-bottom single gillnet). Secara umum jaring rajungan terdiri atas badan jaring (webbing), tali ris atas dan bawah, pelampung (float), tali pampung (float line), pemberat (sinker), tali pemberat (sinker line) dan plengkapan tambahan. Jaring rajungan memiliki nilai hang-in ratio sebesar 57%.
Keyword: crab net fishing gear, operation, crab net catch

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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