International Journal of Quantitative Research and Modeling
International Journal of Quantitative Research and Modeling (IJQRM) is published 4 times a year and is the flagship journal of the Research Collaboration Community (RCC). It is the aim of IJQRM to present papers which cover the theory, practice, history or methodology of Quatitative Research (QR) and Mathematical Moodeling (MM). However, since Quatitative Research (QR) and Mathematical Moodeling (MM) are primarily an applied science, it is a major objective of the journal to attract and publish accounts of good, practical case studies. Consequently, papers illustrating applications of Quatitative Research (QR) and Mathematical Modeling (MM) to real problems are especially welcome. In real applications of Quatitative Research (QR) and Mathematical Moodeling (MM): forecasting, inventory, investment, location, logistics, maintenance, marketing, packing, purchasing, production, project management, reliability and scheduling. In a wide variety of environments: community Quatitative Research (QR) and Mathematical Moodeling (MM), education, energy, finance, government, health services, manufacturing industries, mining, sports, and transportation. In technical approaches: decision support systems, expert systems, heuristics, networks, mathematical programming, multicriteria decision methods, problems structuring methods, queues, and simulation Computational Intelligence Computing and Information Technologies Continuous and Discrete Optimization Decision Analysis and Decision Support Mathematics Education Engineering Management Environment, Energy and Natural Resources Financial Engineering Heuristics Industrial Engineering Information Management Information Technology Inventory Management Logistics and Supply Chain Management Maintenance Manufacturing Industries Marketing Engineering Markov Chains Mathematics Actuarial Sciences Big Data Analysis Operations Research Military and Homeland Security Networks Operations Management Planning and Scheduling Policy Modeling and Public Sector Production Management Queuing Theory Revenue & Risk Management Services Management Simulation Statistics Stochastic Models Strategic Management Systems Engineering Telecommunications Transportation Risk Management Modeling of Economics And so on
Articles
97 Documents
<![CDATA[A COMPARATIVE STUDY OF SOME MODIFICATIONS OF CG METHODS UNDER EXACT LINE SEARCH ]]>
<![CDATA[Yasir Salih]]>;
<![CDATA[Mustafa Mamat]]>;
<![CDATA[Sukono Sukono]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 1 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i1.2
<![CDATA[Conjugate Gradient (CG) method is a technique used in solving nonlinear unconstrained optimization problems. In this paper, we analysed the performance of two modifications and compared the results with the classical conjugate gradient methods of. These proposed methods possesse global convergence properties for general functions using exact line search. Numerical experiments show that the two modifications are more efficient for the test problems compared to classical CG coefficients.]]>
<![CDATA[SHELF LIFE OF NORI FROM Gracilaria sp. WITH ALUMUNIUM FOIL PACKAGING BASED ON THE ACCELERATED SHELF LIFE TEST METHOD ]]>
<![CDATA[Evi Liviawaty]]>;
<![CDATA[Sapinatun Namira]]>;
<![CDATA[subiyanto subiyanto]]>;
<![CDATA[Eddy Afrianto]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 2, No 1 (2021) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v2i1.107
<![CDATA[This research was conducted at the Laboratory of Fisheries Products Processing, Faculty of Fisheries and Marine Sciences, Padjadjaran University, Jatinangor. The purpose of this research is to determine the shelf life of Nori from Gracilaria sp. with the Accelerated Shelf Life Test (ASLT) method Arrhenius Model using Aluminum Foil packaging. Aluminum foil packaging is a package composed of hermetic, flexible, and opaque metal so that it has high protection properties against water vapor, light, grease and gas. The determination of the shelf life of the ASLT method is carried out using parameters of environmental conditions that can accelerate the process of product quality degradation, namely by storing the product at several temperatures above normal storage temperature. The observations used in determining the shelf life of Gracilaria sp. using a sensory test and a water content test with storage for 35 days, at a temperature of 25oC and 35oC. The result of the Arrhenius model calculation, the appearance parameter is selected as the critical parameter because it has the lowest Activation Energy (Ea) in determining the shelf life of Gracilaria sp. which is packaged using PE plastic. The results show that the parameters used to determine the shelf life of the product are the taste parameters based on the order 1 reaction with the Arrhenius Plot Ln K = 0.026 – 1318.4 (1 / T) and Ea of 2619.66 Kj/mol. The shelf life of Nori Gracilaria sp. if stored at 25oC temperature is 89 hari 7 jam.]]>
<![CDATA[Data Cleansing Strategies on Data Sets Become Data Science ]]>
<![CDATA[Sardjono Sardjono]]>;
<![CDATA[R. Yadi Rakhman Alamsyah]]>;
<![CDATA[Marwondo Marwondo]]>;
<![CDATA[Elia Setiana]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 3 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i3.71
<![CDATA[The digital era very grows up with the increasing using of smartphone and many organization or companies was implemented of a system to support their business. That is who will increase the volume of usage and dissemination of data, neither through open nor closed internet networks. Because there is the need to process large data and how to get it from different store resource, so requirement strategy to process the data according to the rule of good, effective and efficient in activity data cleansing until the data set can be use as mature and very useful information for their business purpose. By using the R languaged who can process large data and has data complexity for the data loaded from different storage resource can be done as well as. To using R languaged maximally, so we have to a basic skill that needed to process the data set which will be used to be data scient for organizations or companies by good data cleansing techniques. In this research on Data Cleansing Strategies on data set owned by organizations,will describe the correct step by step to obtaining data that very useful to be uses as data science for organization so by the data that generated after the data cleansing process is very meaningful and useful for making decisions, other than that this research give basic overview and guide to the beginner all data scientists by doing data cleansing in the way stages and also provides a way to analyze from the result of execution some functions used.]]>
<![CDATA[Website Management Training and ICT Literacy Evaluation of Kelurahan Ciwaringin Bogor Authorities ]]>
<![CDATA[Halimah Tus Sadiah]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 2 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i2.26
<![CDATA[The use and management of e-Government websites as a mean of public service among Kelurahan Ciwaringin Bogor (Ciwaringin Bogor Village) officials are still considered low. This has implications on the level of online public services in Ciwaringin Bogor Village which is less optimal. This research aims to provide website management training and to conduct an evaluation on information and communications technology (ICT) literacy prior to (plan) and after (reflect) the training of Ciwaringin Bogor Village authorities in order to optimize the usage of e-Government website for public service improvement purpose. The research method consists of three stages, namely: Planning, Website Management Training, and Reflecting. The training is conducted 10 times from February 2019 to April 2019. Based on evaluation of the planning and reflecting stages, the authorities are ready for ICT usage and management as there is a significant improvement in e-Government website management skill of the Ciwaringin Bogor Village authorities from 40% to 80%.]]>
<![CDATA[A New 3-D Multistable Chaotic System with Line Equilibrium: Dynamic Analysis and Synchronization ]]>
<![CDATA[Muhamad Deni Johansyah]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 2, No 1 (2021) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v2i1.126
<![CDATA[This work introduces a new 3-D chaotic system with a line of equilibrium points. We carry out a detailed dynamic analysis of the proposed chaotic system with five nonlinear terms. We show that the chaotic system exhibits multistability with two coexisting chaotic attractors. We apply integral sliding mode control for the complete synchronization of the new chaotic system with itself as leader-follower systems.]]>
<![CDATA[Laplace Decomposition Method for Solving Fractional Black-Scholes European Option Pricing Equation ]]>
<![CDATA[Abiodun Ezekiel Owoyemi]]>;
<![CDATA[Ira Sumiati]]>;
<![CDATA[Endang Rusyaman]]>;
<![CDATA[Sukono Sukono]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 4 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i4.83
<![CDATA[Fractional calculus is related to derivatives and integrals with the order is not an integer. Fractional Black-Scholes partial differential equation to determine the price of European-type call options is an application of fractional calculus in the economic and financial fields. Laplace decomposition method is one of the reliable and effective numerical methods for solving fractional differential equations. Thus, this paper aims to apply the Laplace decomposition method for solving the fractional Black-Scholes equation, where the fractional derivative used is the Caputo sense. Two numerical illustrations are presented in this paper. The results show that the Laplace decomposition method is an efficient, easy and very useful method for finding solutions of fractional Black-Scholes partial differential equations and boundary conditions for European option pricing problems.]]>
<![CDATA[Meaningful and Memorable Learning: Integrating TPR and Youtube Videos to teach Vocabulary ]]>
<![CDATA[Istiqlaliah Nurul Hidayati]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 2 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i2.37
<![CDATA[The teaching of vocabulary is very essential in teaching a particular language. In Indonesia, English is taught from kindergarten up to higher educations. Unfortunately not all of the teachers in those levels especially in kindergartens and primary schools major in English or at least have good English proficiency. That is why English Language Education Study Program, the Faculty of Teacher Trainings and Educational Sciences, Pakuan University always conducts community service to provide trainings to teachers from any part of the city. The first thing done before the community service was doing need analysis. In 2019, the result of the need analysis was the teaching of vocabulary which is fun and meaningful. 28 teachers were involved in this research. They were divided into two groups to conduct experiment. From the experiment, it is proven that the training given to the teachers increase their understanding about TPR and the teaching of vocabulary. The teachers were also given questionnaire to find out their perception on the use of TPR and YouTube and from the questionnaire the teachers think that their knowledge on the teaching using TPR increased their knowledge and they can find benefits in using TPR and YouTube in the classroom namely: the use of TPR itself can help them accommodate students’ different learning styles, teach vocabulary in context so that it is more meaningful, and the teaching learning situation becomes more fun. ]]>
<![CDATA[Sediment Transport Pattern Modelling in Bojong Salawe Coast Pangandaran using Mike 21 ]]>
<![CDATA[Nira Nirwana]]>;
<![CDATA[Subiyanto Subiyanto]]>;
<![CDATA[Yuniarti MS]]>;
<![CDATA[Yudi Nurul Ihsan]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 2, No 2 (2021) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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<![CDATA[Bojong Salawe is a coastal area with unique characteristics due to a confluence of three rivers that flow through Cijulang, Cijalu, Cialit and into the Indian Ocean. With complex oceanographic conditions, the sediment transport patterns at Bojong Salawe needs to be contemplated, especially the coastal’s utilization which is quite productive. This study aims to determine the sediment types, the sediment transport patterns and the effect of sediment transport on abrasion or accretion which are supported by hydrodynamic parameters modelling such as wind, currents and tides in the west and east monsoons using hydrodynamic modules and sediment transport in MIKE 21. The results showed that the sediments in this study is 80% sandy silt and 20% sand. The sediment transport pattern models in both the west and east monsoons tend to be influenced by tidal currents, sediment types and the season itself. West monsoon has a higher sediment concentration which ranges from 0 to 8.4 kg/m3 compared to the East Monsoon with a range of 0-4 kg/m3. The effect of sediment transport on the average bed level was 0.71861 m in the west monsoon and 0.37586 m in the east monsoon whereas in the estuary (research station), the average change in West Monsoon is 0.00861 m (ST 1) and 0.07107 m (ST 2) and in the East Monsoon, it is 0.01003 m (ST 1) and 0.01147 m (ST 2). This bed level change tends to increase, indicating that the Bojong Salawe coast has experienced sedimentation (accretion).]]>
<![CDATA[THE GARCH MODEL VOLATILITY OF SHARIA STOCKS ASSOCIATED CAUSALITY WITH MARKET INDEX ]]>
<![CDATA[Endang Soeryana Hasbullah]]>;
<![CDATA[Endang Rusyaman]]>;
<![CDATA[Alit Kartiwa]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 1, No 1 (2020) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v1i1.3
<![CDATA[The purpose of this paper is to examine the volatility of Islamic stocks related to the causality of the composite stock price index (CSPI). The aim is to investigate the causality of several levels of stock returns with the movement of the CSPI, and determine its volatility as a measure of risk. To determine the causality relationship is done by using the granger causality test method, with Vector Autoregressive (VAR) modeling. Whereas to determine the volatility is done using the Generalized Autoregressive Conditional Heteroscedastisiy (GARCH) model approach. The results of the causality test show that there is a direct relationship that affects and is influenced by the CSPI, and the relationship that affects each other between the company's stock market and the movement of the CSPI. While the volatility follows the GARCH model (1, 1). Based on the results of this study are expected to be used as consideration in making investment decisions in the analyzed stocks.]]>
<![CDATA[Application of the Leslie Matrix to Predict the Number and Growth Rate of Women in West Java 2021 ]]>
<![CDATA[Ati Maryati]]>;
<![CDATA[Sudrajat Supian]]>;
<![CDATA[Subiyanto Subiyanto]]>
<![CDATA[ International Journal of Quantitative Research and Modeling Vol 2, No 1 (2021) ]]>
Publisher : <![CDATA[Research Collaboration Community (RCC) ]]>
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DOI: 10.46336/ijqrm.v2i1.78
<![CDATA[Data from the Central Statistics Agency 2019 collected that the total population of women in Indonesia is less than male, which is 131.48 million people if compared to the total male population, which is 132.68 million population. This matter is directly relation to the total female population in West Java which is also less than the male population around 24031252.0 female and 24652609.0 male population(Badan Pusat Statistika, 2019).This should be the focus of the government to balance the population growth of women and men in West Java because of the role of women being central in the population growth of the people of West Java. The targets of the development plan contained in the RPJM 2005-2025 is to improve the quality of human resources, including the role of women in development. The growth of the female population is an important thing that must be observed, considering the role of women is determining the development of the human population in the future, because without the role of women the population will not be able to develop. This encourages researchers to predict the number and rate of female population growth in West Java in 2021. The Leslie matrix is a matrix used to predict the number and growth rate of a population. By applying the Leslie matrix to predict the number and growth rate of women in West Java in 2021, it can be concluded that the number of female populations in West Java is around tends to increase.]]>
