Judul: Lampu Celup LED (Light Emiting Diode) sebagai Alat Bantu Penangkapan Ikan pada Gillnet
Abstrak: Gillnet merupakan alat penangkapan ikan berupa lembaran jaring yang berbentuk persegi panjang. Prinsip utama pengoperasiannya adalah menghadang pergerakan ikan. Keberhasilan operasi penangkapannya sangat tergantung pada ada atau tidaknya ikan yang melintas melewati jaring. Nelayan biasanya memanfaatkan cahaya untuk menangkap ikan, dengan cara mengoperasikan jaring disekitar alat tangkap bagan. Namun informasi mengenai pengaruh penggunaan atraktor lampu celup pada gillnet belum banyak ditemukan. Salah satu sumber cahaya yang bisa digunakan adalah lampu LED. Tujuan yang ingin dicapai adalah membuktikan bahwa penggunaan lampu celup pada gillnet akan meningkatkan hasil tangkapan dan menentukan posisi jaring dari lampu celup yang menghasilkan berat tangkapan tertinggi. Metode penelitian yang digunakan adalah experimental fishing menggunakan dua unit alat tangkap gillnet yang dioperasikan secara bersamaan. Masing-masing gillnet dioperasikan dengan lampu celup (GDL) dan tanpa lampu celup (GTL). Analisis data yang dipakai adalah analisis statistik deskriptif dan inferensia. Analisis inferensia yang digunakan berupa analisis parametrik dan non parametrik yang terdiri atas Uji-t dan Kruskal Wallis yang dilanjutkan dengan uji Man-Whitney. Hasil penelitian membuktikan bahwa penggunaan alat bantu lampu celup pada gillnet dapat meningkatkan hasil tangkapan. Jaring GDL menghasilkan tangkapan 189,765 kg, atau lebih berat dibandingkan dengan GTL (102,575 kg). Pengujian secara statistik juga membuktikan bahwa hasil tangkapan GDL lebih banyak dibandingkan dengan GTL. Nilai signifikansi yang diperoleh berdasarkan analisis parametrik t-test adalah 0,006, atau lebih kecil dibandingkan dengan nilai signifikansi 0,05 atau H0 ditolak. Sementara lembaran jaring yang menghasilkan berat tangkapan tertinggi berada pada posisi pertama, yaitu lembar 1,6,7 dan 12 dengan hasil tangkapan sebesar 108,308 kg. Hasil yang sama ditunjukkan oleh uji statistik sebaran hasil tangkapan pada lembaran jaring yang menunjukkan ada perbedaan hasil tangkapan berdasarkan posisi lembaran jaring dari lampu celup. Uji non parametrik Kruskal Wallis menunjukkan nilai asymp. sig 0,000≤0,05.
Keyword: chip on board, jaring insang, lampu celup, light emitting diode, perairan Binuangeun

Judul: Utilization of Underwater Attractor Lamp to Increase Surface Gill Nets Catches in Selayar Island Waters
Abstrak: Prinsip pengoperasian jaring insang adalah menghadang arah ruaya ikan. Keberhasilannya sangat tergantung pada ketepatan pemasangan jaring. Prinsip pengoperasian jaring insang yang sama juga diterapkan oleh nelayan Selayar. Salah satu solusi untuk memperbaiki metode penangkapan adalah menambahkan alat pengumpul ikan berupa lampu atraktor yang dicelupkan ke dalam perairan. Jenis lampu atraktor yang cocok adalah lampu light emitting diode (LED). Tujuan dari penelitian adalah menentukan komposisi jenis ikan hasil tangkapan pada siang dan malam hari tanpa lampu, dan membuktikan bahwa penggunaan lampu atraktor celup akan meningkatkan keragaman dan jumlah ikan hasil tangkapan. Metode penelitian yang digunakan adalah experimental fishing. Jaring insang permukaan dioperasikan pada siang hari sebanyak satu unit dan malam hari sebanyak dua unit. Salah satu unit dilengkapi dengan lampu atraktor celup pada malam hari. Hasil penelitian menunjukkan bahwa waktu pengoperasian dan penggunaan lampu atraktor celup mempengaruhi keragaman jenis ikan tangkapan. Pengoperasian jaring insang pada siang hari menangkap sebanyak 18 jenis ikan dengan jumlah total 1.248 ekor, sedangkan pengopersian malam hari sebanyak 27 jenis ikan pada jaring insang tanpa lampu atraktor celup (JTL) (1.886 ekor) dan 32 jenis ikan pada jaring insang dengan lampu atraktor celup (JDL) (3,608 ekor). Uji statistika yang diperoleh adalah 0,000, atau lebih kecil dibandingkan nilai signifikansi 0,005, atau tolak H0. Artinya, penggunaan lampu atraktor celup berpengaruh terhadap jumlah ikan yang tertangkap., The principle of operation a gill nets is blocking movement of the fish. Its success depends on the precision fixing of the net. The same operating principle of netting is also applied to appropriate fishermen. One solution to improve fishing methods is to add a fish gatherer of underwater attractor lamp. The type of lamp that suitable is a light emitting diode (LED) lamp. The purpose of research was to determine the composition of fish species caught during the day and night without lamp, and to prove that the utilization of underwater attractor lamp will increase the diversity of species and the number of fish produced. The research method used is experimental fishing. Surface gill nets are operated by one unit during the day and two units at night. One of the units was equipped with a underwater attractor lamp at night. The results showed that the operating time and the use of a underwater attractor lamp affected the diversity of fish caught. Operation of gill nets during the day caught 18 species of fish with a total of 1,248 fish, while operation at night as many as 27 species of fish in gill nets without underwater attractor lamp (1,886 fish) and 32 species of fish in gill nets with underwater attractor lamp (JDL) (3,608 fish). The statistical test obtained is 0.000, or smaller than the significance value of 0.05, or rejects H0. This means that use of underwater attractor lamp has an effect on the number of fish caught.
Keyword: Jaring insang permukaan, Jumlah ikan hasil tangkapan, Lampu atraktor celup, light emitting diode (LED), Waktu pengoperasian

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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