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Search Results: 1 - 10 of 5988 matches for " Reza Ahangar "
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Complex Matter Space and Relativistic Quantum Mechanics  [PDF]
Reza Ahangar
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.521317
Abstract: The Special Relativity Theory cannot recognize speed faster than light. New assumption will be imposed that matter has two intrinsic components, 1) mass, and 2) charge, that is M = m + iq. The mass will be measured by real number system and charged by an imaginary unit. This article presents a Complex Matter Space in Relativistic Quantum Mechanics. We are hoping that this approach will help us to present a general view of energy and momentum in Complex Matter Space. The conclusion of this article on Complex Matter Space (CMS) theory will lead help to a better understanding toward the conversion of mass and energy equation, unifying the forces, and unifying relativity and quantum mechanics.
The Relativistic Geometry of the Complex Matter Space  [PDF]
Reza Ahangar
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.52037
Abstract: Duality behavior of photons in wave-particle property has posed challenges and opportunities to discover other frontiers of fundamental particles leading to the relativistic and quantum description of matter. The speed of particles faster than the speed of light could not be recognized, and matter was always described as a real number. A new fundamental view on matter as a complex value has been introduced by many authors who present a paradigm that is shifted from real or pure imaginary particles to Complex Matter Space. A new assumption will be imposed that matter has two intrinsic components: i) mass, and ii) charge. The mass will be measured by real number systems and charged by an imaginary unit. The relativistic concept of Complex Matter Space on energy and momentum is investigated and we can conclude that the new Complex Matter Space (CMS) theory will help get one step closer to a better understanding toward: 1) Un-Euclidean description of Minkowski Geometry in the context of the Complex Matter Space, 2) transformation from Euclidean to Minkowski space and its relativistic interpretation. Finally, geometrical foundations are essential to have a real picture of space, matter, and the universe.
Variation of Parameters for Causal Operator Differential Equations  [PDF]
Reza R. Ahangar
Applied Mathematics (AM) , 2017, DOI: 10.4236/am.2017.812134
The operator T from a domain D into the space of measurable functions is called a nonanticipating (causal) operator if the past information is independent from the future outputs. We will study the solution x(t) of a nonlinear operator differential equation where its changes depends on the causal operator T, and semigroup of operator A(t), and all initial parameters (t0, x0) . The initial information is described x(t)=φ(t) for almost all tt0 and φ(t0) =φ0. We will study the nonlinear variation of parameters (NVP) for this type of nonanticipating operator differential equations and develop Alekseev type of NVP.
An Investigation into the Determinant of Customers’ Preferences and Satisfaction of Internet Banking (Empirical Study of Iranian Banking Industry)
Reza Gharoie Ahangar
Journal of Applied Sciences , 2011,
Abstract: We have observed a considerable growth of internet based services from last many years. Managing service quality while using internet as a distribution channel, is the challenge for the service provider. In this study researcher Investigate the customers’ preferences and satisfaction with five various service quality dimensions which affect the customers’ satisfaction and indicates the relationship between the various demographic variables and satisfaction level of customers. The results of the analysis of the factors reveals that the five factors influenced on satisfaction level of customers are Responsiveness, Reliability, Efficiency and Privacy of Information and Easiness to use. Then the quality performance of all the five dimensions was shown to have a strong impact on customer satisfaction. Finally, some suggestions have been proposed to develop of Internet Banking in Iran.
Computational Approach to Control Laws of Strict-Feedback Nonlinear Systems  [PDF]
Rongdong Wang, Reza Ahangar
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102938
Maple is used to compute control laws of strict-feedback nonlinear systems. The stability of the system is also verified by Maple procedures. We show that computer algebra systems can play an important role in nonlinear system design, in research, and education of nonlinear systems. 
Handwritten Farsi Character Recognition using Artificial Neural Network
Reza Gharoie Ahangar,Mohammad Farajpoor Ahangar
Computer Science , 2009,
Abstract: Neural Networks are being used for character recognition from last many years but most of the work was confined to English character recognition. Till date, a very little work has been reported for Handwritten Farsi Character recognition. In this paper, we have made an attempt to recognize handwritten Farsi characters by using a multilayer perceptron with one hidden layer. The error backpropagation algorithm has been used to train the MLP network. In addition, an analysis has been carried out to determine the number of hidden nodes to achieve high performance of backpropagation network in the recognition of handwritten Farsi characters. The system has been trained using several different forms of handwriting provided by both male and female participants of different age groups. Finally, this rigorous training results an automatic HCR system using MLP network. In this work, the experiments were carried out on two hundred fifty samples of five writers. The results showed that the MLP networks trained by the error backpropagation algorithm are superior in recognition accuracy and memory usage. The result indicates that the backpropagation network provides good recognition accuracy of more than 80% of handwritten Farsi characters.
Multistage evolutionary model for carcinogenesis mutations
Reza Ahangar,Xiao-Biao Lin
Electronic Journal of Differential Equations , 2003,
Abstract: We developed a mathematical model for carcinogenesis mutations based on the reaction diffusion, logistic behavior, and interactions between normal, benign, and premalignant mutant cells. We adopted a deterministic view of the multistage evolution of the mutant cell to a tumor with a fast growth rate, and its progress to a malignant stage. In a simple case of this model, the interaction between normal and tumor cells with one or two stages of mutations was analyzed. The stability of the dynamical system and the travelling wave solutions for different stages of evolution of mutant cells were investigated. We observed the effect of variation and natural selection in shaping the carcinogenesis malignant mutation.
The Comparison of Methods Artificial Neural Network with Linear Regression Using Specific Variables for Prediction Stock Price in Tehran Stock Exchange
Reza Gharoie Ahangar,Mahmood Yahyazadehfar,Hassan Pournaghshband
Computer Science , 2010,
Abstract: In this paper, researchers estimated the stock price of activated companies in Tehran (Iran) stock exchange. It is used Linear Regression and Artificial Neural Network methods and compared these two methods. In Artificial Neural Network, of General Regression Neural Network method (GRNN) for architecture is used. In this paper, first, researchers considered 10 macro economic variables and 30 financial variables and then they obtained seven final variables including 3 macro economic variables and 4 financial variables to estimate the stock price using Independent components Analysis (ICA). So, we presented an equation for two methods and compared their results which shown that artificial neural network method is more efficient than linear regression method.
An Investigation into the Determinant of Service Quality among Management Students (Empirical Study of Iranian Students)
Ali Sorayaei,Reza Gharoie Ahangar,Ehsan Kasiri,Afsaneh Bahrami
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: This study explores the Iranian education to generate a curriculum that should be comprehensive of the rich inheritance of different variables like knowledge, skill and attitude. For that purpose, Service Quality (SERVQUAL) is a standard instrument to evaluation the level of quality provided. The present study is an attempt to measure the level of Service Quality provided by Zenithal in the field of technical education among management students. The results of the questionnaire survey are analyzed in relation to the five Service Quality (SERVQUAL) dimensions (tangibles; reliability; responsiveness; assurance; empathy) and revealed that various aspects of quality differ significantly based on some demographic variables.
Fabrication of Silver Nanoparticles Dispersed in Palm Oil Using Laser Ablation
Reza Zamiri,Azmi Zakaria,Hossein Abbastabar Ahangar,Amir Reza Sadrolhosseini,Mohd Adzir Mahdi
International Journal of Molecular Sciences , 2010, DOI: 10.3390/ijms11114764
Abstract: In this study we used a laser ablation technique for preparation of silver nanoparticles. The fabrication process was carried out by ablation of a silver plate immersed in palm oil. A pulsed Nd:YAG laser at a wavelength of 1064 nm was used for ablation of the plate at different times. The palm oil allowed formation of nanoparticles with very small and uniform particle size, which are dispersed very homogeneously within the solution. The obtained particle sizes for 15 and 30 minute ablation times were 2.5 and 2?nm, respectively. Stability study shows that all of the samples remained stable for a reasonable period of time.
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