Judul: Edible Film dengan bahan dasar air limbah surimi ikan nila (Oreochromis niloticus)
Abstrak: Pencucian merupakan salah satu tahapan dalam pembuatan surimi yang sangat penting untuk dilakukan. Proses pencucian surimi menggunakan air dalam jumlah yang cukup besar. Oleh karena itu dari proses pembuatan surimi dapat dikeluarkan limbah cair yang tidak sedikit dan dapat menimbulkan masalah lingkungan yang cukup serius bila tidak ditangani dengan baik.
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Judul: Kajian potensi air limbah surimi sebagai alternatif bahan baku untuk mengurangi penggunaan serum janin sapi pada media kultur hewan
Abstrak: Penggunaan serum janin sapi sebagai suplemen dalam media kultur Shewan memerlukan biaya tinggi. Dalam proses pembuatan surimi dari ikan dihasilkan limbah yang kaya nutrisi dan dapat dibuat menjadi serum ikan. Limbah yang dibuang selama proses pembuatan surimi mengandung banyak komponen terlarut termasuk protein, komponen nitrogen, mineral dan lain-lain. Penelitian ini dilakukan untuk menganalisis kandungan protein, lemak dan mineral serta kadar air, abu, TVN dan TMA yang terdapat dalam air limbah surimi. Lebih lanjut air limbah surimi dapat digunakan sebagai alternatif untuk mengurangi penggunaan serum janin sapi dalam media kultur dan mengatasi masalah penanganan limbah hasil proses pembuatan surimi sehingga limbah dapat dimanfaatkan dan memiliki nilai ekonomi. Penelitian ini menggunakan ikan beloso lokal yang termasuk spesies Lizardfish. Tahap pertama penelitian ini adalah persiapan sampel air limbah skala laboratorium, menghitung jumlah air limbah yang akan dihasilkan melalui penimbangan berat ikan dan pembuatan konsentrat dari air limbah yang dihasilkan pada skala laboratorium, pada tahap ini parameter yang dianalisis adalah kadar protein. Air limbah skala industri didapat dari industri surimi di Thailand. ...
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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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