The fish mass mortality often occurred in the Maninjau Lake as the oxygen level as well as the carrying capacity of the lake may not be able to support the life of the cultured fish. A research aims to determine carrying capacity of the lake based in dissolved oxygen has been conducted on January to March 2017. There were 4 stations; 2 stations were in the inlet area (Pandan and Sigiran) and 2 …
Phosphate is an important element for determining the fertility of waters and a limiting factor for the growth of phytoplankton. A research aims to understand the vertical profile of phosphate in Diatas Lake was conducted in February - March 2017. Water samples were taken from 3 stations, namely Station 1 (inlet area), Station 2 (in the middle of the lake) and Station 3 (outlet area).The vertic…
There were several methods to understand the trophical state of waters, such as chemical, biological and combination of chemical and biological methods. The combination method, namely the TRIX method is more representative for predicting the trophical state of the water and thus it was used to analyze the trophical state of the Maninjau Lake waters. This research was conducted in Januari – Ma…
The water surface of the dam of the Fisheries and Marine Science Faculty of Riau University is almost covered by Pistia stratiotes and this condition may affect the availability of fish in that area. To understand the types of fish associated with that aquatic plant, a research has been conducted February to March 2017. Based on plant density, there were 3 sampling sites, site 1 (46.19 plants/m…
Dam and streams around the University of Riau is inhabited by many types of aquatic organism, including prawns. Scientific information of those organisms, however, is almost none. To understand the types of freshwater prawns present in that area. A research has been conducted from February to April 2017. Sampling areas were in the dam, pond and streams around the University of Riau. Freshwater …
Pangasius polyuranodon is one of freshwater fishes that inhabit the Siak and Kampar Rivers in Riau. Water qualities in those areas are different. Availabillity of food and the success of reproduction are important factors for the fish existence. To understand the stomach content and reproductive biology of this fish, a study has been conducted from October – December 2016. The fish was sample…
The peat water has low pH and it can be improved by adding bentonite and lime. The use of lime, however, produced relatively large amount of sediment. To understand the effectiveness of combined bentonite and lime in osmofilter paper package to increase the pH and reduce the sediment, a study has been conducted on May- Juni 2016. Combination of 1,7 g bentonite and 1,7 g lime were wrapped using …
A study aims to understand the condition of tofu industry waste water, the effectiveness of stabilization ponds in improving the waste water quality and the effects of discharged waste in the Tarai River, a study has been conducted on September 2016. The tofu waste was obtained from the UD. Dhika Putra tofu industry. Waste water was sampled from the stabilization ponds (3 sampling areas) and in…
This final project discusses a single premium of the whole life insurance using half increasing annuity based on Burr distribution. This calculation of premium is solved by predetermined life probability based on Burr distribution, discount factor using Dothan interest rate model, and single premium of whole life insurance using insurance money payment made at the end of the policy year. K…
This nal project discusses the solutions for a diophantine equation { A + B = C, ABC = Dn, where A, B, C, D, n are positive integers and n ≥ 3. The equations are regard as a generalization of Fermat's equation xn +yn = zn. This is a review of some parts of Cai et al. [Journal of Number Theory, 149 (2015), 33{45]. The solutions are determined by using the concept of greatest common div…
This article discusses a model economic manufacturing quantity in production process that has random variables for item breakdown and machine break down. In machine breakdown, the production has the time breakdown obeying the exponential distribution. The optimal result is obtained when the total inventory cost being in uenced by time is convex function. The procedure of model is ilustrat…
This nal project discusses some identities of Fibonacci and Lucas sequences. Binet's formula of Fibonacci and Lucas sequences are used to prove these identities. Some identities of Fibonacci and Lucas polynomials are also explained. The identities being form from these polynomials are proved by Binet's formula of Fibonacci and Lucas polynomials. This is a review of Singh et al. [Internati…
This final project discusses the use of Adomian decomposition method to solve a class of nonlinear problems which is a review of the article of Cano [ISRN Applied Mathematics 2011 (2011), 1-10]. The discussion begins by solving the initial value problems using Adomian decomposition method to find the approximate solution. The approximate solution obtained in the form of power series is com…
This final project discusses the cubic spline quadrature weights method which is a method to estimating the value of approximation of a function. This final project presents the work of Leung and Quan [Appl. International Journal of Mathematics Education in Science and Technology, 15 (1984), 305-313]. The numerical simulation shows that the cubic spline quadrature weights method has a good…
This final project discusses the determination of expected return portfolio using Theil mixed estimation of Black-Litterman’s model and the comparison of the weighted values asset between Black-Litterman’s model and meanvarians model. Stage in the determination of the expected return portfolio is to calculate the expected return values, to determine the view investor, then to combine t…
Kampar Kanan River has strong current and rocky substrate and it may affect the type and abundance of phytoplankton and ephylitic periphyton. To understand the type and abundance those organisms, a study has been conducted in February to March 2017. Parameter measured were types and abundance the phytoplankton and ephylitic periphyton, temperature, brightness, current, depth, pH, DO, free CO2, …
This final project discusses three estimators for population mean in Post- Stratified sampling, which is a review article from Onyeka et al. [Global Journal of Science Frontier Research and Decision Sciences, 13 (2013), 1-9]. The three estimators are biased estimators, then their mean square errors are determined. Furthermore, the mean square errors are compared to the mean square error of…
Osphrenemus gouramy or gurami fish is freshwater fish that live in the Pinang Luar Lake. Population of that fish in the lake, however, is low and information on its biological aspect such as morphometric, meristic, and growth pattern is rare. A study aims to determine those aspects had been conducted in March 2017. There were 102 fishes, with 63.87-193.72 mm TL and 3.49-129.98 gr BW. There were…
This final project discusses the premium of healthy insurance of the log-logistic distribution. Health insurance is one type of insurance products that specifically guarantees the cost of health insurance or care when participants experience health problems that caused hospitalized. Health insurance reserve calculation is solved by determination of the single premium, annual premium and ann…
This study aims to: 1) To determine the correlation of the original school students with student motivation to learn Education Program History Armed 2014. 2) To determine the correlation of the original school students with student learning outcomes Education Program History Armed 2014. 3) To determine the correlation the entrance to the student motivation to learn students of History Education…