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    Wyświetlanie 1-10 z 10
    Tytuł:
    Application of the Nonhomogeneous Poisson Process for Counting Earthquakes
    Autorzy:
    Sumiati, Ira
    Rahmani, Ulfa
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1062838.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nonhomogeneous Poisson processes
    earthquakes
    simple linear regression
    Opis:
    Nonhomogeneous Poisson processes are Poisson processes with parameters that depend on time and not constant from time to time, also mutually independent. In addition, the probability of no occurrence in the initial state is one and the probability of the n event in the initial state is zero. In this study, nonhomogeneous Poisson processes were applied to predict and count the number of earthquake events in Indonesia. Because earthquakes that occur in Indonesia from one month to the next do not affect each other and the numbers are not the same, by not paying attention to the geophysical cause of the earthquake. The data used in the study is the occurrence of earthquakes in Indonesia from January 2016 to July 2018, sourced from the Meteorology, Climatology and Geophysics Agency obtained online. The results were obtained that the odds of predicting dan counting the occurrence of earthquakes in Indonesia in the first week of December 2018 were around 184 times with a standard deviation of around 14 times.
    Źródło:
    World Scientific News; 2019, 127, 3; 163-176
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Shoreline Changes in the Coastal Area of Kuala Terengganu, Malaysia
    Autorzy:
    Subiyanto, Subiyanto
    Ahmad, Ahmad
    Mamat, Mustafa
    Ihsan, Yudi Nurul
    Afrianto, Eddy
    Hidayat, Yuyun
    Supian, Sudradjat
    Powiązania:
    https://bibliotekanauki.pl/articles/1031676.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Crank-Nicolson
    accretion
    coastal development
    erosion
    implicit scheme
    Opis:
    The analysis of shoreline change trends is fundamental to a broad range of investigations undertaken by coastal scientists, coastal engineers, and coastal managers, as well as the government, in this case, the coastal development policy-maker. In order to know the changing of shoreline position around the coastal area of Kuala Terengganu, an analysis and then simulation of shoreline change was performed over, respectively, 2 years, 3 years and 4 years. In this simulation, the longshore distance was divided into 87 cells of length 34 m. Shoreline positions from satellite imagery in 2010 were used in this simulation as the initial condition. Based on the numerical result, both erosion (north side) and accretion (south side) occurred around the Sultan Mahmud Airport, Kuala Terengganu. The average erosion and accretion during the 4 year period is 42.93 m and 40.89 m, respectively.
    Źródło:
    World News of Natural Sciences; 2020, 28; 24-33
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convergences Analysis from the Solution Function of the Riccati Fractional Differential Equation by Using Modified Homotopy Perturbation Method
    Autorzy:
    Sevira, Nurazizah M.
    Rusyaman, Endang
    Firdaniza, Firdaniza
    Subiyanto, Subiyanto
    Supian, Sudradjat
    Powiązania:
    https://bibliotekanauki.pl/articles/1059423.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Convergent
    Differential Equation
    Fractional
    Modified Homotopy Perturbation Method
    Riccati
    Opis:
    A Fractional differential equation is an equation that contains derivatives with an order of fractional numbers. Same with natural number order differential equations, this type of equation is divided into linear and nonlinear fractional differential equations. One of the equations that include nonlinear fractional differential equation is Riccati fractional differential equation (RFDE). Various methods have been applied to find solutions for fractional differential equations Riccati, one of them is the Modified Homotopy Perturbation Method (MHPM) which is a modification of the Homotopy Perturbation Method by Zaid Odibat and Shaher Momani. In this study, the MHPM was used to find solutions for fractional differential equations Riccati, which were then used to analyze the convergence of the function sequences of the solution. The result shows us that the order sequence of Riccati fractional differential equation which converges to a number causes the solution function sequence of Riccati fractional differential equation will converge to the function of the solution of Riccati fractional differential equation with the order of this number.
    Źródło:
    World Scientific News; 2019, 128, 2; 71-87
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of accelerated learning method to improve the ability of students mathematical representation
    Autorzy:
    Rika, Amelia
    Wati, Susilawati
    Agus, Hikmat Syaf
    Riva, Lesta Ariany
    Sudradjat, Supian
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1177701.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Method of accelerated learning
    Quasi Experiments
    mathematical representation
    purposive sampling
    Opis:
    One of the mathematical skills that must be possessed by students is the ability of mathematical representation, therefore the applied learning method should be able to facilitate the students to learn to represent the mathematical ability they have. The purpose of this study to determine the improvement of students' mathematical representation in mathematics learning using accelerated learning method. The research method used is Quasi Experiments with Nonequivalent (Pretest and Posttest) design of Control Group Design. The population in this study is the students of grade X in Pasundan Majalaya Senior High School by using Purposive Sampling technique. The samples involved in the study were 48 students of Pasundan Majalaya Senior High School, 24 students came from class X MIPA 1 (experimental class) and 24 students came from class X MIPA 3 (control class). The learning method is applied to the students of class X MIPA 1 is the method of accelerated learning whereas in the students of class X MIPA 3 is conventional methods. The result of mathematical representation of students 'mathematical representation shows that there is an improvement of ability for students' mathematical representation with gain value of 0.56 with middle criterion for class X MIPA 1 and 0.17 with lower criterion for class X MIPA 3.
    Źródło:
    World Scientific News; 2018, 101; 65-76
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scheduling of Flowshop Type Production with Dannenbring Method to Obtain Optimal Results with Observing Waiting Time and Weight of Jobs
    Autorzy:
    Rahmani, Ulfa
    Wulan, Elis Ratna
    Huda, Arief Fatchul
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1062846.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Linear Programming
    Makespan
    Weigted Mean Flow Time
    Opis:
    Linear programming is a step or process to get maximum results with existing resources or it can be said the process of looking for optimal value. One part of scheduling is production scheduling. production scheduling is the use of resources that are few but make the most profit. This paper discusses production scheduling using flowshop type production scheduling by taking into account transportation times and work weights. This paper uses the Dannenbring method with the aim of finding the optimal sequence of problems by considering the total production time (makespan) and the average Weigted Mean Flow Time (WMFT). Based on the results of the Dannenbring method, the results of flowshop scheduling are obtained with a total makespan of 75 hours and the WMFT value is 28, 87 hours.
    Źródło:
    World Scientific News; 2019, 127, 3; 212-224
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Optimization Model for Location Transportation Problems with Ellipsoidal Uncertainty Set
    Autorzy:
    Pribadi, Diantiny Mariam
    Chaerani, Diah
    Dewanto, Stanley P.
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1062875.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Ellipsoidal uncertainty set
    Location transportation problem
    Mixed integer linear problem
    Robust Counterpart
    Robust Optimization
    Uncertainty demand
    Opis:
    The location transportation problem is a combination of location, routing and inventory facilities. The problem of transportation locations consists of strategic decisions and operational decisions. Strategy decisions consist of location and facility capacity to meet demand, while operational decisions consist of final production and optimal distribution. However, sometimes there is uncertainty in demand, which influences operational decisions. Robust Optimization is a method for solving problems that are affected by uncertainty in data. This study aims to apply single-stage with an ellipsoid approach to the problem of transportation locations with uncertainty in demand. Robust optimization through the ellipsoidal uncertainty set approach provides costs for strategic and operational decisions that tend to remain for each production period. As for the optimization model, the influence of uncertainty in demand can affect the uncertainty of strategic and operational costs.
    Źródło:
    World Scientific News; 2019, 127, 3; 296-310
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Cobb-Douglas Production Function to Manufacturing Industries in West Sumatra Indonesia
    Autorzy:
    Nurunnajib, Ahfazh Fauzy
    Wulan, Elis Ratna
    Awalluddin, Asep Solih
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1177721.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cobb-Douglas Production Function
    Least Square Estimation
    Manufacturing Industry
    Newton Raphson Method
    Opis:
    In this paper, we discusses one of the production functions that shows the relationship between the level of output and the level of input combinations that called Cobb-Douglas production function. The estimation method used is the least square estimation with the settlement using Newton Raphson iteration. The Cobb-Douglas production function is applied to five selected manufacturing industries in West Sumatra. From the research result, the return to scale (RTS) of the rubber and plastic goods industry is 0.8424 and the return to scale of the food and beverage industry is 0.8496 in which the two industries produce RTS <1. Whereas return to scale of the publishing and printing industry is 1.0460, the return to scale of the textile industry is 1.0018, and the return to scale of the non-metallic mining industry is 1.3384. Of the three industries each produce RTS> 1.
    Źródło:
    World Scientific News; 2018, 101; 145-156
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Character analysis on linear elementary algebra with max-plus operation
    Autorzy:
    Kalfin, Kalfin
    Jufra, Jufra
    Muhtar, Norma
    Subiyanto, Subiyanto
    Supian, Sudradjat
    Powiązania:
    https://bibliotekanauki.pl/articles/1177763.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Max-Plus Algebra
    eigenvalues and eigenvectors
    matrix
    vector space
    Opis:
    This paper discusses the further characteristic that exists in max-plus algebra by comparing the characteristics that exist in ordinary linear algebra. The steps taken are to examine what happens to linear algebra, then applied to max-plus algebra with respect to the existing operations. Characteristics of matrix operations and differences that occur in linear algebra and are met in max-plus algebra with max and plus operations. However, max-plus algebra does not satisfy the vector space characteristics.
    Źródło:
    World Scientific News; 2018, 100; 110-123
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Best Model of LASSO With The LARS (Least Angle Regression and Shrinkage) Algorithm Using Mallow’s Cp
    Autorzy:
    Januaviani, Trisha Magdalena Adelheid
    Gusriani, Nurul
    Joebaedi, Khafsah
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1076395.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cp Mallows
    LARS
    LASSO
    Multicollinearity
    Opis:
    Multicollinearity often occurs in regression analysis. Multicollinearity is a condition of correlation between independent variables which is a problem. One method that can overcome multicollinearity is the LASSO (Least Absolute Shrinkage and Selection Operator) method. LASSO is able to help to shrink multicollinearity and improve the accuracy of linear regression models. Estimators of LASSO parameters can be solved by the LARS (Least Angle Regression and Shrinkage) algorithm by algorithm which calculates the correlation vector, the largest absolute correlation value, equiangular vector, inner product vector, and determines the LARS algorithm limiter for LASSO. Selecting the best model using the Mallow’s C_p statistics. The smallest Mallow’s C_p value will be selected as the best model. LASSO method with a more detailed procedure with LARS algorithm and selecting the best model using the Mallow’s C_p statistics is discussed in this paper.
    Źródło:
    World Scientific News; 2019, 116; 245-252
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flowshop scheduling with respect to transport time, break-time and weight of jobs using Nawaz, Enscor and Ham (NEH) methods
    Autorzy:
    Bahari, Muhammad Faudzi
    Wulan, Elis Ratna
    Huda, Arief Fatchul
    Supian, Sudradjat
    Subiyanto, Subiyanto
    Powiązania:
    https://bibliotekanauki.pl/articles/1177485.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Flowshop
    Makespan
    NEH
    Scheduling
    Weighted Mean Flow Time
    Opis:
    This research discusses a production scheduling by using flowshop type production scheduling with respect to transportation time, break-time and weight of jobs. The data used are four job scheduling on three machines. In addition, there is inter-machine transport time. The method was used in this research is NEH Method. Based on the results, the NEH method obtained a makespan value of 56 hours with a weighted mean flow time of 34.07 hours.
    Źródło:
    World Scientific News; 2018, 102; 180-187
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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