Research Title: IMPACT OF ECCENTRICITY ON HEAT TRANSFER IN AN ANNULAR SQUARE FILLED WITH SATURATED POROUS MEDIUM

Author: Laith Batarseh, Published Year: 2017

Faculty: Engineering and Technology

Abstract: In this work, the eccentricity effect on heat transfer in an annular square filled with a saturated porous medium was investigated. A numerical solution based on the Galerkin finite element was found for three different cases: (1) positive and negative diagonal eccentricity, (2) positive and negative horizontal eccentricity ±ex, and (3) positive and negative vertical eccentricity. In this study, the outer walls of the annuli were kept isothermally at hot temperature, while the inner walls were kept isothermally at cold temperature. The analysis is carried out to find the influence of eccentricity for three selected nondimensional values (±0.1, ±0.5, ±0.9) on two selected Rayleigh numbers of 100 and 200, without and with the effect of radiation equal to 0 and 1 and for different width ratios (0.25, 0.5, 0.75), respectively. Numerical results of fluid flow and heat transfer characteristics inside the porous medium for the three cases considered were presented and discussed. Furthermore, the results of the average Nusselt number of each outer wall show an increase as eccentricity increases, in particular, at higher values of width ratios ≥0.75.

Keywords: annular square, porous medium, heat transfer, Nusselt number, Rayleigh number

Research Title: three dimensional stress strain analysis of a typical gas turbine blade using finite element method

Author: Muhammad Mustafa Gogazeh, Published Year: 2018

Faculty: Engineering and Technology

Abstract: Energy is extracted in gas turbine systems by expanding working fluids (hot gases) through several rings passages of fixed stator (blades) and moving rotor blades. Blades should have maximum reliability, durability, maximum yield strength and minimum material cost. The objective of this work is to analyze three dimensional stress-strain field equations on a three dimensional axial flow turbine blade using two types high speed steel –HSS- (iron base super alloys) and titanium alloys (Ti-6Al-2Sn.). An attempt has been made to compute stresses and displacements of a typical rotor blade of gas turbine system and comparing the obtained results with an available data. The analysis also involves derivation of three dimensional stress-strain equations, including body, forces. Attention was focused on analyzing stress-strain field on the upper, lower blade surfaces, and on the chord line of the turbine blade. The discretized (meshed ) model of the blade is generated using solidworks package, and the generated equations are solved by customized software. Steady state stress-strain analysis is assumed to understand the generalized behavior of blade forces from root to tip using finite element method. The results show that complexity of the stress-strain field over turbine blade. Result show that Ti6Al4V is better than HSS in most of application cases.element techniques and software to analyse strain and stress of a typical gas turbine blade

Keywords: finite element , gas turbine blade , stress , strain

Research Title: تحديث طرق الرقابة الحكومية العليا وفقا لمتطلبات الخصخصة ( دراسة تطبيقية في الاردن )

Author: Jafer Maroof Al Sawalhah, Published Year: 2013

Journal of Baghdad College of Economic sciences University مجلة كلية بغداد للعلوم الاقتصادية الجامعة, Issue: 36 Pages: 279

Faculty: Business

Abstract: This research addressed the problem of Preservation of public money in order to avoid regulatory gaps that occur as a result of privatizing some government units and managed, financial transformation of the public sector to the private sector to activate the spectrum Tools government censorship, and updated in accordance with international auditing standards, which required studying the factors that help the financial control of a high development and the development of programs operating electronic data through the model year and then apply the elements of control in the operation of electronic data. The second factor which was adopted by the research was to focus on control performance with the direction of public administration based on the criteria of economic feasibility and a cost-benefit and encoding Multiple quality. To get out of financial control of the traditional audit department.So for the International Accounting Standards Committee (IASC) provides to a large extent to meet the requirements set above. As the Standards Committee holds to accept the most professional organizations located in developed and developing countries alike, depending on the means of the three above; Operating-mail, Performance Audit and International Standards on Auditing. Been developed strategic planning and audit programs and plans of modern control and then put the plan into action, the involvement of the Audit Bureau this development which has become a reality if necessary due to the change in the structures of some quarters concerning the maintenance of public money as a result of privatization and Tathiratvakiet GATT, which is an original research problem. Through the above research focuses on the following :1. Supreme Audit and characteristics2. Standards of internal financial controls and government recognized internationally.3. Plans for a program of development and modernization of government internal control

Keywords: الرقابة المالية

Research Title: The Relationship between Capital Structure and Profitability

Author: Jafer Maroof Al Sawalhah, Published Year: 2012

International Journal of Business and Social Science , Vol. 3 No. 16

Faculty: Business

Abstract: This study seeks to extend Abor’s (2005), and Gill, et al., (2011) findings regarding the effect of capital structure on profitability by examining the effect of capital structure on profitability of the industrial companies listed on Amman Stock Exchange during a six-year period (2004-2009). The problem statement to be analyzed in this study is: Does capital structure affect the Industrial Jordanian companies? The study sample consists of 39 companies. Applying correlations and multiple regression analysis, the results reveal significantly negative relation between debt and profitability. This suggests that profitable firms depend more on equity as their main financing option. Yet recommendations based on findings are offered to improve certain factors like the firm must consider using an optimal capital structure and future research should investigate generalizations of the findings beyond the manufacturing sectors.

Keywords: Short term Liabilities, Long term liabilities, Return on Equity, Amman Stock Exchange.

Research Title: Measuring Quality Performance of Mechatronics Engineering Programs

Author: Mohammed Bani Younis, Published Year: 2018

19th International Conference on Research and Education in Mechatronics (REM), Delft, Netherlands

Faculty: Engineering and Technology

Abstract: Quality criteria and performance measurement are becoming essential tools for assessing and developing academic programs. In this paper, accreditation and quality criteria from six different agencies (ABET, QAA, ENQA, ASIIN, HEAC, and ISO) are gathered, compared, and tailored towards mechatronics engineering programs. Seven Criteria are identified: strategy planning, resources and student support, academic programs, student learning outcomes, research, local and international collaboration, and quality assurance. Then, 12 Key Performance Indicators (KPI) and seven Student Learning Outcomes (SLO) are selected. Quality assurance methodology proposed in this study can be used as the basis to measure the performance of mechatronics programs.

Keywords: Key Performance Indicators; Mechatronics Programs; Quality Criteria; Measurement Methodology, Student Learning Outcomes

Research Title: Harmonics generation Due to Multi-Cycle Auto Reclosing on HV Transmission Lines

Author: Mohammed Bani Younis, Published Year: 2019

Faculty: Engineering and Technology

Abstract: The technology of auto-reclose has been widely used on overhead HV transmission lines in most of power systems. As most of the faults on a transmission line are transient in nature, the auto-reclose can greatly improve the reliability and stability of the power system. The purpose is to make the fault line re-run after the temporary fault elimination. In this work the generation and nature of harmonics during auto reclosing process is investigated using adopted Fourier series instead of Fourier transform. It is found that subharmonics as well as higher order harmonics of the line frequency are generated depending on the type and durations of the reclosing. Also the amplitude and phase-angle relationships of these harmonic components are calculated for multi-pole multi-cycle auto reclosing. The results were verified using fast Fourier transform. It is found that the adopted Fourier series method gives more accurate and clearer results for the nature of harmonics than those based on simulation techniques such as FFT and discrete Wavelet Transform (DWT). Keywords— Auto reclosing, Fourier series, transmission lines, Fourier transform, harmonics, subharmonics

Keywords: Auto reclosing, Fourier series, transmission lines, Fourier transform, harmonics, subharmonics

Research Title: Combining Program Slicing and Algorithmic Debugging to Diagnose a PLC program

Author: Mohammed Bani Younis, Published Year: 2019

Faculty: Engineering and Technology

Abstract: Program logic controllers are widely used in industry either to control the manufacturing process or the processing plant. Thus, any faulty behavior in the program logic controller will have a crucial effect on both of the industry or/and labors. Therefore, it is important to be able to detect and diagnose any fault in the program logic controller. This paper introduces a new debugging technique; it combines both of the program slicing and the algorithmic debugging techniques. This is attained by making use of the instruction list programming to perform the debugging techniques and then it is converted into a control flow graph before applying the new combination between the slicing and algorithmic debugging. Through the use of these techniques, the debugger can utilize the feedback from the user to detcet the fault and find the source of this fault.

Keywords: Program Slicing; Debugging; Algorithmic debugging; Diagnosability

Research Title: Temperature control of a heat sink based on Hardware in the Loop

Author: Mohammed Bani Younis, Published Year: 2018

Faculty: Engineering and Technology

Abstract: This paper is concerned with the modeling, design, and implementation of controllers for a heat sink system using a Single Board Computer. Temperature data is collected from an electrical circuit plant and used to develop a block model using MATLAB Simspace. Then, the Simscape model is used to design a Proportional-Integral-Derivative controller in a simulation environment. Two techniques, Control Prototyping and Hardware-In-the-Loop, are used to validate the controller results. Finally, the Proportional-Integral-Derivative controller is embedded in BeagleBone Black and connected to electrical circuit plant. Experimental results show that the BeagleBone Black can implement Proportional-Integral-Derivative controllers in real-time environment with accurate results.

Keywords: Temperature Control; Hardware in the Loop; BeagleBone Black

Research Title: Analysis and Design of Adaptive Current Controller for DC Drive Using Z-Transform

Author: Mohammed Bani Younis, Published Year: 2018

Proceedings of the15th IEEE SSD 2018, Hammamet, Tunisia

Faculty: Engineering and Technology

Abstract: Tracking applications such as robotics, actuation, manipulation and radar antenna system employing four-quadrant thyristorized D.C. drive require precise and optimal speed control. In this paper, the analysis and design of an adaptive current controller of a separately excited d.c. motor with a thyristor converter using z-transform technique is presented. With an adaptive current controller, the current loop will have the same dynamic characteristics whatever may be its operational state. A hardware realization of the controller is also discussed. A digital simulation study is made of the performance of the closed loop speed control system using an approximate continuous time representation for describing its dynamics. The designed controller responses were simulated with the help of MATLAB to show the validity of the proposed method.

Keywords: power electronics, d.c. machines, d.c. drives, control theory, z-transform, adaptive control

Research Title: Analysis and Design of an Adaptive Current Controller with DC Drives for Tracking Applications

Author: Mohammed Bani Younis, Published Year: 2019

Faculty: Engineering and Technology

Abstract: Tracking applications such as robotics, actuation, manipulation and radar antenna system employing four-quadrant thyristorized DC drive require precise and optimal speed control. A track is a time history of position and/or velocity that the end effector of a manipulator should follow at all time. In this paper, the analysis and design of an adaptive current controller for a permanent magnet d.c. motor driven by a four-quadrant thyristor converter is presented. The proposed adaptive current controller will enable the current loop of the closed loop speed control system of the DC motor to have the same dynamic characteristics whatever may be its operational state regarding continuous or discontinuous current modes. Current loop analysis is presented using z-transform technique. Criteria for the selection of the parameter and hardware realisation of the adaptive current controller are also discussed. A digital simulation study is made of the performance of the closed loop speed control system using an approximate continuous time representation for describing its dynamics. The hardware design of the controller is simple, reliable and easy to implement.

Keywords: power electronics, d.c. machines, d.c. drives, control theory, z-transform, adaptive control