Increased plastic waste has a negative impact on the environment if not further processed, Because plastic waste is nonbiodegradable One method that can be used to process plastic waste is pyrolysis method.The purpose of this study was to observe the effect of process variables (temperature and ratio of PP plastic: PS) to yield and characterization of pyrolysed oil produced. the pyrolysis proce…
This final project discusses the evaluation of value-at-risk for claim severity having a Rayleigh distribution. Value-at-risk is the estimation of maximum loss which can occur with -level of confidence over a certain period of time. The losses caused by the large value of the claims can be overcome by a transformation called the proportional hazard transform. From this tranformation a new…
The green open space is one of an effort in order to handling of the increasing the greenhouse gas emission, because green open space has an ability to absorbing the CO2 emission. The purpose of this research is to find out the potential of absorption capacity of CO2 by the pbulic’s green open space and to analyze the level of absoption of CO2 by green open space from transportation activity.…
This final project discusses the predictor-corrector method based on quadrature rules for solving a nonlinear equation. The special cases of the discussed methods are Midpoint Newton quadrature method and Trapezoid Newton quadrature method. These methods have respectively two and three function evaluations per iteration. Convergence analysis shows that both iterative methods have the order…
PT. Perkebunan Nusantara V in its operational activities has the potential to generate noise coming from palm oil production machines. Workers who are constantly exposed to noise have the potential to affect workers' health and comfort. The purpose of this research is to know the intensity of noise generated by oil palm production machine, exposure time, map of noise distribution pattern, and n…
This nal project discusses the high order iterative method based on a quadrature rule for determining a simple root of nonlinear equations. The order of the method depends on the number of quadrature nodes used. If the number of quadrature nodes used is one, we obtains Newton method of the order two, If the number of quadrature nodes used is two, we obtain Newton-Trapezoid methods with th…
Biocoagulant is a natural coagulant that has an active substance and has a role as cationic which is able to bind colloidal particles in water. Chitosan is a non-toxic, easy-to-degrade and polyelectrolyte biocogulant that can be found in crustacean animals especially in crabs (Brachyura). The availability of crab shell waste has a huge potential to be used as raw material for making chitosan. H…
This final project discusses a general algorithm used for determining the nu- merical approximations to derivatives of any order. The algorithm is based on linear combinations of Taylor series for nonequispaced nodes. The algorithm also gives truncation and round-off errors for the numerical approximations. Keywords: System of linear equations, matriks, Taylor series, numerical app- roxima…
Produced water has a complex composition and more than 40% is discharged into the environment. Constructed wetlands is one of the water produced treatment systems that use vegetation, media, and microorganisms for pollutants removal. The objectives of this research were to determine the efficiency of pollutants parameter removal and to assess the effect of residence time of COD, NH3 and TDS. Su…
The population of Pekanbaru City grows increasingly every year, especially in Bukit Raya Sub-district. The higher number of motorcycle used by the people as a transportation directly affect the amount of CO2 emissions generated from each vehicles. This study aims to calculate the volume of vehicles and predict CO2 emissions from the number of vehicles in Bukit Raya District. The methodology use…
This final project discusses a family of four-step iteration method with six parameters which requires three function evaluations and one derivative function evaluation. Analytically it is showed that the iterative method has the optimal order of convergence eight, with the efficiency index is 1:682 which is optimal according to Kung and Traubs conjecture. Numerical comparisons shows that …
Drilling mud wastewater is one of Hazardous and Toxic Substance from drilling activities by oil-gas company contain by phenol, H2S (dissolved sulfide) and COD with concentration 43,3 mg/L; 7,332 mg/L and 3400 mg/L. In this research is using Advanced Oxidation Processes (AOPs) ozone based with oxidation potential value 2,08 eV. Ozonation is performed by injecting ozone on reactor with continious…
This final project discusses a family of two-step iterative method, which is a correction of the article Ogbereyivwe dan Atoma [International Journal of Mathematics and Statistics Invention, 2 (2014), 24–27]. Analytically it is showed, using the Taylor expansion and geometric series, that the iterative method has the convergence of order fourth. Numerical comparisons show that this metho…
This final project discusses the parameter estimators of middle cencored data with exponential distribution having expectation E(x) = 1/θ. Parameter θ is estimated using the method of maximum likelihood. Because the result of maximum estimator ˆθ cannot be obtained explicitly, then for solution of maximum estimator θ is done numerically using an iterative procedure h(θ). Next, the co…
This final project discusses the quadrature method for solving nonlinear Fredholm integral equations of the second kind. Quadrature method provides an approximate solution approaching to the exact solution. Then, the error of quadrature method is discussed. The numerical simulation results show that by using quadrature method, nonlinear Fredholm integral equation of the second kind is solv…
The CNC machine (Computer Numerically Controlled) is a machine tool equipped with a computer-controlled mechanical and control system capable of reading N, G, F, T, and other code instructions. The codes will be instructed to the CNC machine interface system, so that the machine can work in accordance with the program listings that have been made. In general, the selling price of this machine i…
This final project discusses the mathematical model of love and happiness with affair. In this model, system of differential equations is used to describe quality of each individual. There are four conditions observed, in which each case is analyzed using Routh-Hurwitz criterion. Furthermore, simulation is given to show the behaviour and the stability of each case. Keywords: Differential e…
In the development of manufacture industry the use of composite materials began to be widely used. One of them is composite by using fiber glass or fiber carbon, because of its characteristic that can be designed close to certain needs. In addition the specific strength and stiffness are far exceeding the engineering material in general. This research uses carbon fiber composite material as veh…
This nal project discusses an error sums from roots of positive integers but not a perfect square. The error sum functions dened by "( √ D) = Σ1 m=0(−1)m(qm √ D − pm) and "( √ D) = Σ1 m=0(qm √ D − pm), are considered where D is positive integers but not a perfect square and pm=qm denotes the convergence of the continued fraction expansion of √ D. This is …
This study focuses attention on the efforts to reveal and analyze the effect of leadership and organizational culture with work ethic and performance of employees either directly or indirectly on tax services office pratama in Pekanbaru. Primary data were collected using a questionnaire as a tool to prove the results. The subjects of this study were employees in Pekanbaru covering on tax…