AL-MANSOUR JOURNAL

The Radio Frequency (RF) transceiver performs various functions and the use of software defined radios (SDRs) is increasing day after another. The SDRs are characterized by their flexibility where the software can change the functionality of the device without changing its hardware. This paper presents a flexible SDR-based communication system. The simulated system has the ability to perform the following modulation / demodulation modes: AM, DSB, SSB, QAM, FM and PM. These modes are achieved by software at the baseband frequency components that are in-phase component (I) and quadrature phase component (Q) in accordance to the modulator / demodulator instead of achieving this process digitally at IF or RF frequency directly. The simulated results proved the efficiency of the implemented system in case of noiseless or noisy channel. To simplify the use and evaluation of the proposed system a Graphical User Interface (GUI) has been implemented for the system.

Internet of Things (IoT) applications represents a new revolution in information technology field. Researchers have predicted that by 2020, the number of digitally connected devices will exceed 50 billion. However, due to the fact that IoT applications aim to provide the ability for billions of smart devices to connect and interact to each other via the Internet, IoT security challenges are huge. IoT security has always been a major concern of discussion not only for researchers, but also for users when assessing the risks of using IoT applications. IoT applications are vulnerable to various types of attacks related to security issues. Therefore, the need to protect such applications from those attacks has been increased. Many works of researchers have been conducted to reduce or minimize the effect of security attacks on IoT environment. This research aims to explore the security requirements and limitations of IoT, then classifies security attacks based on IoT architecture layers. Finally, up-to-date IoT security solutions are proposed briefly and conclusions are made. This research gives a better understanding to future trends for researchers in IoT security.

In this paper, a novel technique of an automotive electromechanical sunlight curtain for the cars is designed and implemented. It depends on applying the sunlight rays on a photodiode at an angle fitted to that of the sunlight rays falling on the eyes of the car driver and the person beside him and make them uncomfortable. The proposed system is composed from four main parts: The photodiode and related comparator, a control circuit, 12 Volt DC motor with gearbox, and sunlight curtain plate with some mechanical parts. When the sunlight rays fall onto the photodiode with an desired angle, the control circuit will instruct the DC motor to rotate in clockwise direction, the motor will rotate the curtain plate to the downside location, where the curtain plate will prevent the sunlight rays to fall on eyes of the car driver or the person beside him. The proposed system has been tested practically in different environment conditions and different seasons, and it has exhibited stimulant results.

Since 1980's, word-prediction systems have been used as writing aids. They were used by people with physical incompetence to reduce the amount of effort needed to enter text, but later they were found to be also helpful to people with learning or language weakness, such as difficulties in speaking, spelling, or grammar. The purpose of this paper is to propose an auto-completing system built using multidimensional nesting matrices to build a database that store the previously learned words, and use that database to find all the words that starts with a given two letters. Where, it's taken 5.343 seconds to look for word which starts with existing first two letters, and it has taken 2.2568 seconds to look for word which start with two nonexistent letters in the database.

Robotic path-planning is a major problem in the robotic world, and one of the most used algorithms in this area is the A* algorithm. This paper presents a modified A* Algorithm that can work in a Three-Dimensional (3D) sphere environment and allows the moving of robot to reach its goal while avoiding obstacles on its path, solve local minima problems, safety rim and accurate convergence. The F(n)* evaluation function has been used in the proposed modified A*. Simulation results showed that the proposed modified A* guarantee to find near optimal, safe path from the start position to goal point in 3D static sphere environment with acceptable execution time.

Magnetic levitation is an unstable and non-linear system. The main problem for these types of systems is how to develop a control system to obtain the desired output response. For years several techniques and methods have been followed to get a control system that meets requirements of stable performance. In this paper, a classical PID controller is implemented, to control a magnetic levitation system. A fuzzy system is used to modify the parameters of PID controller according to body position. The impact of system’s non-linearity has been reduced with the suggested controller. The simulation results explain that the supervisory fuzzy-PID controller has a good robustness and a quality controller. The model of the system is simulated using Matlab R (2015) a Simulink.

In this paper, we study the solution of the cancerous tumors operator equation of the form:A^* XA+t AXA=Q, Where A is a known operator defined on a Hilbert space H, represent the contributing factors are cancer (Hormonal factor ,Nutrient factor, Relationship between nutrient and hormone, Genetic factor, Viruses,...), Q is a known operator defined on a Hilbert space H, represent the percentages of contributing. Factors are cancer (Sex, Age, Exposure to radiation, Take sedatives, Psychological stress, Factors that weaken immunity, ...), t is any scalar positive real number, represent the control factor, X is unknown operator, represents the treatment of the injured in terms of quantity and quality of treatment , and A^* is adjoint of operator A. Also, we show the nature of the solution for this operator equation for special types of operators. As well as, we will introduce some propositions and remarks because it is very important in this new study of medical systems of differential equations.

: Printed Arabic document image retrieval is a very important and needed system for many applications including electronic archiving, search engines, and document management systems. In this paper, an adaptive header-words based printed Arabic document images classification and retrieval system has been proposed that based on decision tree classifier improved by bagging technique. The proposed system implements effective preprocessing and segmentation techniques to prepare the document and correctly detect a specific Arabic header words form query document. Besides that, a collection of discriminative features has been extracted from detected header words to correctly classify them to a right class. In the proposed system, bagging technique has been adapted with decision tree classifier to enhance the performance of classification and hence improve the precision of retrieving documents. The experimental tests confirmed that the proposed system achieved very satisfied results of 97.35% for precision.

The problem of study diagnosis the reduction in sales in the company of plant oils in some its classes and weakness in differentiation and its reputation at market in spit if having good products with standardized features And lack of customer communication channels، also the company does not have any whole view about the concept of marketing communication، Therefore، This study aimed define to know the type of relationship between the extent of the impact of the integrated marketing communications an independent variable represented the nine dimensions and customer satisfaction as a dependent variable Using a descriptive and analytical approach That is formulated to search premises branched out of the nine major hypotheses، In order to achieve these objectives، the study was applied in the General Company for vegetable oil industry using the descriptive and analytical method with an objective sample of (84) department managers and employees of the company by means of the questionnaire and statistical analysis using statistical methods، and the researcher used analytic and descriptive method with using the statistical analysis program (SPSS-v23) with interviews ، Statistical Methods showed a number of results، the most important active results with a good and positive relation between marketing communication and its dimensions with customer satisfaction، As well as the need for the management of the company investigated to raise awareness of its employees desire to increase the level of satisfaction of customers and thus gain their satisfaction and loyalty .

The research aims to formulate an applied vision on the relationship between the practices of managers and the requirements of contemporary organizations. A sample of the Ministry of Housing and Construction was selected in three companies and the research was conducted on a sample of (144) of its employees at various administrative levels (manager, engineer, administrative). A number of hypotheses have tested for correlation and influence between search variables. Criteria for verifying these hypotheses have adopted, including the questionnaire as a main tool for collecting data and information, consisting of (66) sections covering research aspects (managers' practices, requirements of contemporary organizations) , And the personal observation of the researcher and using a set of statistical tools to analyze data and information using the program (SPSS vr23).The research reached a number of conclusions,( the most important of which are: the direction of the managers of the companies investigated towards the accounting practices more than the other practices, and the companies' efforts to reach the requirements of the contemporary organizations, especially the employees and their requirements and other requirements). In the light of the conclusions, a set of recommendations was formulated (corporate emphasis on managers to enhance their positive role, encourage employees, adopt a staff recycling approach, and a broader role for managers' practices in providing the pillars for requirements to contribute to the activities and practices of managers).