Judul: Studi tentang Penelusuran Jejak Ikan dengan Menggunakan Sistem Pemrosesan Sinyal Simrad EP 500
Abstrak: Penelitian ini bertujuan untuk memberikan informasi tingkah laku ikan pelagis kecil perairan Selat Sunda melalui penelusuran jejak ikan dengan menggunakan sistem pemrosesan sinyal SIMRAD EP 500 dan menduga lokasi penangkapan ikan pelagisnya. Pengumpulan data dilakukan di Perairan Selat Sunda pada tanggal 24 Juli 1998 hingga 3 Agustus 1998. Cruise track/pelayaran riset terbagi menjadi 36 ESDU (Elementary Sampling Distance Unit) dengan panjang 6 mil laut tiap ESDU. Perekaman data dilakukan siang dan malam tanpa henti dengan kecepatan kapal enam sampai tujuh knot.
Keyword: 

Judul: Penentuan nilai sebaran kecepatan renang ikan pelagis dengan menggunakan simrad ek-500 split beam acoustic system di perairan laut Sulawesi pada bulan Agustus - September 2001
Abstrak: Perikanan tropis di Indonesia merupakan multispesies ikan, dimana ikan dari berbagai spesies dan ukuran panjang menempati volume perairan yang sama. Situasi kompleks ini dapat mempengaruhi ketepatan perhitungan akustik dengan teknik integrasi echo. Salah satu contoh penerapannya yaitu split beam acoustic system untuk mengetahui kecepatan renang ikan pelagis di perairan Laut Sulawesi. Penentuan nilai dan sebaran kecepatan renang ikan pelagis berguna untuk mengetahui tingkah laku ikan yang bersangkutan pada wilayah tersebut. Hal ini berkaitan dengan peningkatan kemampuan dari suatu jenis alat tangkap dan perkembangan efisiensi dari suatu metode penangkapan bagi usaha perikanan komersional. Penelitian ini bertujuan untuk menentukan nilai kecepatan renang menurut kedalaman, waktu renang Ikan dan target strength ikan pelagis tunggal di perairan Laut Sulawesi serta mengetahui distribusi spasial dan temporal ikan yang bersangkutan. Data diperoleh dari penelitian akustik pada tanggal 18 Agustus 2001-14 September 2001 di wilayah perairan Laut Sulawesi. Sarana yang digunakan yaitu satu unit Kapal Riset Baruna Jaya IV yang dikelola bersama oleh BPPT dan DISHIDROS TNI-AL dengan instrumen akustik berupa Scientific Echosounder SIMRAD EK-500 untuk memperoleh data akustik, GPS (Global Positioning System) untuk menentukan posisi, dan CTD Seacat Profiler V4,0, Tipe SBE 19, Sea-bird electronics untuk menentukan suhu, salinitas, dan kedalaman. Selanjutnya data diolah dengan menggunakan software EP-500, Microsoft Excel, dan Surfer 7,00.
Keyword: 

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
Keyword: