Papers by Mohammad Ghani, Ph.D.
Basically, a machine learning algorithm is a program for pattern recognition and developing intel... more Basically, a machine learning algorithm is a program for pattern recognition and developing intelligence into the machine to make it capable of learning and improving its understanding and decisionmaking capabilities with experience. • Pattern recognition is a program to make the machines understand the environment, learn to differentiate the object of interest from the rest of the objects, and make decisions by categorizing the behavior. Machines are trained in a way that make decisions in a much similar way that humans do. In machine learning, a general algorithm is developed to solve problems.
Apache Hadoop, written in Java, is open-source framework that supports processing of large data s... more Apache Hadoop, written in Java, is open-source framework that supports processing of large data sets. It can store a large volume of structured, semistructured, and unstructured data in a distributed file system and process them in parallel. Hadoop is composed of four major components: HDFS, MapReduce, YARN, and Hadoop Common.
In big data storage, architecture data reaches users through multiple organization data structure... more In big data storage, architecture data reaches users through multiple organization data structures. The big data revolution provides significant improvements to the data storage architecture. New tools such as Hadoop, an open-source framework for storing data on clusters of commodity hardware, are developed, which allows organizations to effectively store and analyze large volumes of data. • Cluster computing is a distributed or parallel computing system comprising multiple stand-alone PCs connected together working as a single, integrated, highly available resource. • The benefits of massively parallel processors and cluster computers are high availability, scalable performance, fault tolerance, and the use of cost-effective commodity hardware. Scalability is achieved by removing nodes or adding additional nodes as per the demand without hindering the system's operation.
A key-value store database is a simplest and most efficient database that can be implemented easi... more A key-value store database is a simplest and most efficient database that can be implemented easily. It allows the user to store data in keyvalue pairs without any schema. The data is usually split into two parts: key and value. The key is a string, and the value is the actual data; hence the reference key-value pair. The implementation of the key-value database is similar to hash tables. • There are no alternate keys or foreign keys as in the case of RDBMS, and they are much faster than RDBMS. A practical application of keyvalue data store includes an online shopping cart and store session information in online gaming in the case of multiplayer games.
JTAM (Jurnal Teori dan Aplikasi Matematika)
Viscous fluid can micro-rotate due to collisions between particles that affect viscous fluid'... more Viscous fluid can micro-rotate due to collisions between particles that affect viscous fluid's velocity and temperature.This study aims to determine the effect of viscosity parameters, micro-rotation materials, and heat sources on fluid velocity and temperature. The model of the laminar flow equation for viscous fluid in this study uses the laws of physics, namely, the law of conservation of mass, Newton II, and Thermodynamics I. The formed dimensional equations are converted into non-dimensional equations by using non-dimensional variables. Then, the non-dimensional equations are converted into similarity equations using stream function and similarity variables. The formed similarity equation was solved numerically by using the Gauss-Seidel method. The results of this study indicate that the velocity and temperature of the viscous fluid flow can be influenced by the parameters of viscosity, micro-rotation material, and heat source. The presence of collisions between particles c...
International Journal of Computing Science and Applied Mathematics
In this paper, we are interested in the numerical results on the temperature and velocity profile... more In this paper, we are interested in the numerical results on the temperature and velocity profiles over a sphere of unsteady nano fluid by dealing with the effect of Prandtl, mixed convection, and magnetohydrodynamics. We first employ the boundary layer theory to establish the continuity, momentum, and energy equations. We further solve those differential equations numerically by using the finite difference scheme of Crank-Nicolson and Thomas algorithm for the iteration technique. The temperature and velocity profiles are established graphically for the variations of Prandtl, mixed convection, and magnetohydrodynamics. The velocity profile decreases when the variations of Prandtl numbers increase. Moreover, the velocity profiles increase when the variations of mixed convection and magnetohydrodynamics are increased. The temperature profiles are decreased for all variations of Prandtl numbers, mixed convection and magnetohydrodynamics.
Dalam skripsi ini, diperkenalkan mengenai definisi, teorema tentang Quasi-Ideal Minimal dalam -Se... more Dalam skripsi ini, diperkenalkan mengenai definisi, teorema tentang Quasi-Ideal Minimal dalam -Semigrup Terurut (po- -Semigrup). Telah diketahui secara jelas bahwa -Semigrup Terurut merupakan perluasan dari -Semigrup, dengan perbedaan mendasar yaitu terdapat suatu relasi terurut parsial (partially ordered relation). Sehingga dalam skripsi ini akan dibahas definisi, teorema Quasi-Ideal Minimal dalam -Semigrup Terurut (po- -Semigrup) yang merupakan perluasan dari Quasi-Ideal Minimal dalam -Semigrup
The availability of renewable energy such as solar and wind is a determining factor in the conver... more The availability of renewable energy such as solar and wind is a determining factor in the conversion of electrical energy in solar cell and wind turbine power plants. The level of availability of renewable energy is a consideration in the orientation of the development of renewable energy plants. The purpose of this study was to determine the potential of renewable energy sources, namely wind, and sun in the Gili Iyang island, Madura. Geographically, Gili Iyang is an island with an area of 9.15 km2 with a typical coastal area located to the east of the island of Java. Data retrieval is done by direct retrieval method by surrounding the entire island. Data retrieval is based on geographic points marked with GPS and using a solar power meter and anemometer instrumentation tools. Data processing techniques are carried out using MATLAB and 3DField. The data processing technique is carried out so that the location of areas with high and low potential for renewable energy sources can be easily identified. The results of the study case region, in the form of spatial data and geographical information system. From the measurement results, the highest potential for renewable energy is found on the south to the west coast with an irradiation level of 1068 W/m2. The highest wind energy potential is on the west to the south coast with an average wind speed of 5.6 m/s. The wind speed is suitable for a wind turbine with capacities below 500 Watts. Based on the measurement results, the standard deviation for wind potential is 1.68 m/s and 233.89 W/m2 for solar irradiation. The findings from this research can be used as a reference for stakeholders, consultants, and contractors to plan the best location for the installation and power grid of wind and solar power plants.
According to the 2006 research report data of the Lembaga Penerbangan dan Antariksa Nasional (LAP... more According to the 2006 research report data of the Lembaga Penerbangan dan Antariksa Nasional (LAPAN) and the findings of the Balai Besar Teknologi Kesehatan Lingkungan dan Pengendalian Penyakit (BBTKLPP), the oxygen (O2) and carbon dioxide (CO2) levels on Gili Iyang Island reached 20.9%-21.5% and 302 ppm-313 ppm, respectively. In comparison to oxygen levels in other regions, O2 concentrations are relatively higher. This investigation determined the air quality on Gili Iyang Island by an examination. Using O2 and CO2 meters, O2 and CO2 concentrations were measured at 77 sites over the island's land and water. The average O2 concentration is 20.02%, whereas the average CO2 concentration is 475.68 ppm. The measured findings suggest a reduction in O2 concentration and an increase in CO2 concentration. Based on the results of the visualization using the 3Dfield with the color cell map approach, the waters of the southern portion of the island have the highest O2 levels, while the middle of the island has the highest CO2 levels. Multiple variables contribute to the increasing and decreasing CO2 concentrations. The installation of a diesel power plant in 2017 and the increase in the number of motor vehicles on Gili Iyang island are among the contributing reasons. These have been delivering adverse implications for the island's ecosystem.
For this project, we designed several control systems for a predator-prey chemostat: one obtained... more For this project, we designed several control systems for a predator-prey chemostat: one obtained using root locus methods and three that rely on full-state feedback, including one that utilizes the LQR optimal control technique. We also quantified the desired performance of the system and its robustness to disturbances and sensor noise. We applied all three controllers as well as the performance and robustness analysis to both a linear and a nonlinear model of the chemostat and applied the observer-based controller to a nonlinear model which incorporates inaccuracies in measured parameters, observation delay, and limits on the rate of nutrient addition
Mathematics and Computers in Simulation
Modeling Earth Systems and Environment
International Journal of Computing Science and Applied Mathematics
HIV-1 is a virulent virus, it has the ability to easily spread the virus. This study aims to opti... more HIV-1 is a virulent virus, it has the ability to easily spread the virus. This study aims to optimally control the spread of the HIV-1 virus with SIPA (Susceptible-Infection-PreAIDS-AIDS) model by using nutritional status and ARV-treatment. Assessment of nutritional status is carried out on people with HIV/AIDS (ODHA). The results showed that the control in the form of nutritional status and ARV-treatment was able to reduce the infected subpopulation. Routine assessment of nutritional status can form balanced nutrition for ODHA. ARV-treatment works by reducing the amount of HIV viral load, so that HIV infection cannot cause disorders of the immune system.
Postulat : Jurnal Inovasi Pendidikan Matematika
Implicit method is one of the finite difference method and is widely used for discretization some... more Implicit method is one of the finite difference method and is widely used for discretization some of ordinary or partial differential equations, such like: advection equation, heat transfer equation, burger equation, and many others. Implicit method is unconditionally stable and has been proved with the approximation of Von-Neumann stability criterion. Actually, implicit method is always identical to block matrices (tri-diagonal matrices or penta-diagonal matrices). These matrices can be solved numerically by Thomas algorithm including Gauss elimination using pivot or not, backward or forward substitution. Furthermore, it can be also solved using LU decomposition method with the elimination of lower triangle matrices first and then the elimination of upper triangle matrices. In this research, Thomas algorithm is used to solve numerically for the problem of convective flow on boundary layer, especially for energy equation with the variation of Prandtl number ( ).
Journal of Fundamental Mathematics and Applications (JFMA), 2021
We are interested in study of the velocity (𝑓′) and temperature (𝜃) profiles for fluid flow over ... more We are interested in study of the velocity (𝑓′) and temperature (𝜃) profiles for fluid flow over the surface of porous flat plate with the effect of magnetohydrodynamics. The dimensional equations are first transformed into the non-dimensional equations. Then, we transform the non-dimensional equations into the similar equations using stream functions. The numerical results are based on the discretization of similar equations using the finite difference method of Keller-Box. Based on the numerical results, the velocity profiles (𝑓′) decrease when the viscoelastic parameter (𝐾), Prandtl number (𝑃𝑟), magnetic parameter (𝑀), porosity parameter (𝑃) are increased. Moreover, the temperature profile (𝜃) is increased when the viscoelastic parameter (𝐾) and magnetic parameter (𝑀) are increased. However, the temperature profile (𝜃) decreases when Prandtl number (𝑃𝑟) and porosity (𝑃) are increased.
InPrime: Indonesian Journal of Pure and Applied Mathematics, 2021
AbstractIn this paper, we investigate the numerical results between Implicit and Crank-Nicolson m... more AbstractIn this paper, we investigate the numerical results between Implicit and Crank-Nicolson method for Laplace equation. Based on the numerical results obtained, we get the conclusion that the absolute error of Crank-Nicolson method is smaller than the absolute error of Implicit method for uniform and non-uniform grids which both refer to the analytical solution of Laplace equation obtained by separable variable method.Keywords: Crank-Nicolson; Implicit; Laplace equation; separable variable method; uniform and non-uniform grids. AbstrakDalam makalah ini, kami menyelidiki hasil numerik antara etode Implisit dan Crank-Nicolson untuk persamaan Laplace. Berdasarkan hasil numerik yang diperoleh, kita mendapatkan kesimpulan bahwa kesalahan absolut metode Crank-Nicolson lebih kecil daripada kesalahan absolut metode Implisit untuk grid seragam dan tak-seragam yang keduanya mengacu pada solusi analitik persamaan Laplace yang diperoleh dengan metode separable.Kata kunci: Crank-Nicolson; I...
Aliran konveksi campuran merupakan perpaduan antara aliran konveksi bebas (free convection flow) ... more Aliran konveksi campuran merupakan perpaduan antara aliran konveksi bebas (free convection flow) dan aliran konveksi paksa (forced convection flow). Dalam hal ini, pengaruh aliran gaya yaitu gaya tekanan (pressure forces) dan gaya apung (buoyant forces) pada aliran konveksi bebas menjadi signifikan. Aliran konveksi campuran dapat digunakan pada teknologi reaksi reaktor dan pendingin elektronik. Di dalam tesis ini persamaan lapisan batas (boundary layer) aliran konveksi campuran fluida viskoelastik yang melewati permukaan sebuah bola awalnya ditransformasikan kedalam bentuk nondimensi, kemudian ditransformasikan kedalam bentuk persamaan lapisan batas nonsimilar yang diselesaikan secara numerik menggunakan metode skema Crank-Nicholson.
Mixed convection flow is the combination between free convection flow and forced convection flow.... more Mixed convection flow is the combination between free convection flow and forced convection flow. In this research, the pressure and buoyancy forces are significant. The governing equations are taken from Navier-Stokes equation that includes continuity, momentum, and energy equations. These equations are obtained from Boussinesq and boundary layer approximations. These non-dimensional equations are then transformed into non-dimensional equations to make easy in numerical processes. Further, these non-dimensional equations are transformed into non-similar equations and solved numerically using the finite difference method.
Jambura Journal of Mathematics, 2022
We are interested in the study of asymptotic stability for Burgers equation with second-order non... more We are interested in the study of asymptotic stability for Burgers equation with second-order nonlinear diffusion. We first transform the original equation by the ansatz transformation to establish the existence of traveling wave. We further employ the energy estimate under small perturbation and arbitrary wave amplitude. This energy estimate is then used to establish the stability.
Uploads
Papers by Mohammad Ghani, Ph.D.