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Papers by mubarak elhafian

Research paper thumbnail of Estimations of accelerated Lomax lifetime distribution with a dependent competing risks model under type-I generalized hybrid censoring scheme

alexandria engineering journal, Aug 1, 2022

Research paper thumbnail of Evaluate the performance of the K-means method when increasing the sample Size

International Journal of Scientific and Research Publications (IJSRP), 2018

In this paper, weexamined K-means clustering algorithm as one of the methods of data clustering a... more In this paper, weexamined K-means clustering algorithm as one of the methods of data clustering and analysis process. The proposed study investigated the k-means algorithm with different size of samples. This study was tested the diabetes UCI standard dataset as case study. We start our experiments with 1015(Random number) sample size, and then we increase the sample size for each run by 1015 units. The elapsed time for each tested was calculated and reported for investigation process. Our investigation procedure was conducted using the R software. The OneSample Kolmogorov-Smirnov Test used for examined the normality of the sample size and clustering processing time. The test proofed that the samples that we used is not distributed normally. In order to test the effect of the increase in sample size, we divided the samples into two groups: small samples (1015-15225) and large samples (17255-30450). Using a Mann-Whitney U test to test for a difference between the two groups, the medi...

Research paper thumbnail of Numerical Solution for Heat Transfer of Non – Newtonian Second – Grade Fluid Flow over Stretching Sheet via Successive Linearization Method

Abstract— The main purpose of this paper is to obtain the numerical solutions for the MHD flow of... more Abstract— The main purpose of this paper is to obtain the numerical solutions for the MHD flow of heat transfer of incompressible second grade fluid on a stretching sheet channel. The governing partial differential equations are converted into ordinary differential equation by using a similarity transformation. The nonlinear equation governing the flow problem is modeled and then solved numerically by means of a successive linearization method (SLM). The numerical results are derived in tables for comparisons. The important result of this comparison is to show the high precision of the SLM in solving system of nonlinear differential equations. The solutions take into account the behavior of Newtonian and non-Newtonian fluids. Graphical outcomes of various non-Newtonian parameters such as mixed convection parameter, Hartman, Deborah and Prandtl numbers on the flow, field are discussed and analyzed. Besides this the present results have been tested and compared with the available publ...

Research paper thumbnail of Using Markov Chain to Predict by the Natural Progression of Diabetic Nephropathy at Diabetes and Endocrinology Hospital

Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalame... more Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalameen81@gmail.com abdu-53@hotmail.com hafian10@yahoo.com 1 Sudan University of Science and Technology , Department of Statistics, College of Science 2Shendi University. Department of Statistics , Faculty of Science and Technology 3King Abdulaziz University, Department of Mathematics, College of Science and Arts ,Jeddah, Kingdom of Saudi Arabia

Research paper thumbnail of The Impact of Sample Size on the Probability Samples to Estimate the Total population Number

Indian Journal Of Science And Technology

Research paper thumbnail of Using Markov Chain to Predict by the Natural Progression of Diabetic Nephropathy at Diabetes and Endocrinology Hospital

Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalame... more Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalameen81@gmail.com abdu-53@hotmail.com hafian10@yahoo.com 1 Sudan University of Science and Technology , Department of Statistics, College of Science 2Shendi University. Department of Statistics , Faculty of Science and Technology 3King Abdulaziz University, Department of Mathematics, College of Science and Arts ,Jeddah, Kingdom of Saudi Arabia

Research paper thumbnail of Spatial Regression of reproduction of dengue fever mosquito's transmitter phenomenon in the university municipality-Jeddah province – Kingdom of Saudi Ariba -2018

International Journal of Scientific Research and Management

The method of Geographical Information System is used for building statistical models to e... more The method of Geographical Information System is used for building statistical models to estimate the number s of mosquitoes which are effected by natural factors. Decisions makers and mosquitoes' combater; in particular, those carriers to Dengue Fever, regarding to set plans and methods to fight them depending on the weighted least square model. The study aimed to build a model known by regressions spatial to the phenomenon of mosquitoes' reproduction within the neighborhood of the Jeddah Municipal. Also, studying the quality of spatial models which is estimated; including studying and determining reasons that lead to mosquitoes' reproduction carry Dengue Fever within Jeddah City. The researcher also did not forget the possibility of calculating or estimating the numbers of mosquitoes carry Dengue Fever in any single spot within the neighborhood whereas two factors were determined which are the temperature and humidity to estimate numbers of mosquitoes carry Deng...

Research paper thumbnail of Estimations of accelerated Lomax lifetime distribution with a dependent competing risks model under type-I generalized hybrid censoring scheme

alexandria engineering journal, Aug 1, 2022

Research paper thumbnail of Evaluate the performance of the K-means method when increasing the sample Size

International Journal of Scientific and Research Publications (IJSRP), 2018

In this paper, weexamined K-means clustering algorithm as one of the methods of data clustering a... more In this paper, weexamined K-means clustering algorithm as one of the methods of data clustering and analysis process. The proposed study investigated the k-means algorithm with different size of samples. This study was tested the diabetes UCI standard dataset as case study. We start our experiments with 1015(Random number) sample size, and then we increase the sample size for each run by 1015 units. The elapsed time for each tested was calculated and reported for investigation process. Our investigation procedure was conducted using the R software. The OneSample Kolmogorov-Smirnov Test used for examined the normality of the sample size and clustering processing time. The test proofed that the samples that we used is not distributed normally. In order to test the effect of the increase in sample size, we divided the samples into two groups: small samples (1015-15225) and large samples (17255-30450). Using a Mann-Whitney U test to test for a difference between the two groups, the medi...

Research paper thumbnail of Numerical Solution for Heat Transfer of Non – Newtonian Second – Grade Fluid Flow over Stretching Sheet via Successive Linearization Method

Abstract— The main purpose of this paper is to obtain the numerical solutions for the MHD flow of... more Abstract— The main purpose of this paper is to obtain the numerical solutions for the MHD flow of heat transfer of incompressible second grade fluid on a stretching sheet channel. The governing partial differential equations are converted into ordinary differential equation by using a similarity transformation. The nonlinear equation governing the flow problem is modeled and then solved numerically by means of a successive linearization method (SLM). The numerical results are derived in tables for comparisons. The important result of this comparison is to show the high precision of the SLM in solving system of nonlinear differential equations. The solutions take into account the behavior of Newtonian and non-Newtonian fluids. Graphical outcomes of various non-Newtonian parameters such as mixed convection parameter, Hartman, Deborah and Prandtl numbers on the flow, field are discussed and analyzed. Besides this the present results have been tested and compared with the available publ...

Research paper thumbnail of Using Markov Chain to Predict by the Natural Progression of Diabetic Nephropathy at Diabetes and Endocrinology Hospital

Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalame... more Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalameen81@gmail.com abdu-53@hotmail.com hafian10@yahoo.com 1 Sudan University of Science and Technology , Department of Statistics, College of Science 2Shendi University. Department of Statistics , Faculty of Science and Technology 3King Abdulaziz University, Department of Mathematics, College of Science and Arts ,Jeddah, Kingdom of Saudi Arabia

Research paper thumbnail of The Impact of Sample Size on the Probability Samples to Estimate the Total population Number

Indian Journal Of Science And Technology

Research paper thumbnail of Using Markov Chain to Predict by the Natural Progression of Diabetic Nephropathy at Diabetes and Endocrinology Hospital

Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalame... more Mohammedelameen Eissa Qurashi 1 , Abdellateef Khalifa Hamid 2,and Mubarak H.Elhafian 3,1 wedalameen81@gmail.com abdu-53@hotmail.com hafian10@yahoo.com 1 Sudan University of Science and Technology , Department of Statistics, College of Science 2Shendi University. Department of Statistics , Faculty of Science and Technology 3King Abdulaziz University, Department of Mathematics, College of Science and Arts ,Jeddah, Kingdom of Saudi Arabia

Research paper thumbnail of Spatial Regression of reproduction of dengue fever mosquito's transmitter phenomenon in the university municipality-Jeddah province – Kingdom of Saudi Ariba -2018

International Journal of Scientific Research and Management

The method of Geographical Information System is used for building statistical models to e... more The method of Geographical Information System is used for building statistical models to estimate the number s of mosquitoes which are effected by natural factors. Decisions makers and mosquitoes' combater; in particular, those carriers to Dengue Fever, regarding to set plans and methods to fight them depending on the weighted least square model. The study aimed to build a model known by regressions spatial to the phenomenon of mosquitoes' reproduction within the neighborhood of the Jeddah Municipal. Also, studying the quality of spatial models which is estimated; including studying and determining reasons that lead to mosquitoes' reproduction carry Dengue Fever within Jeddah City. The researcher also did not forget the possibility of calculating or estimating the numbers of mosquitoes carry Dengue Fever in any single spot within the neighborhood whereas two factors were determined which are the temperature and humidity to estimate numbers of mosquitoes carry Deng...