Research Title: Thermal Performance of Building Attached Sunspace In Jordan Climate

Author: Nadia Fayez Badarneh, Published Year: 2010

, Nuclear & Renewable Energy Conference (Inrec), 2010, pp: 1 - 6,

Faculty: Engineering and Technology

Abstract: The thermal performance of a sunspace attached to a living room located in Amman-Jordan has been investigated. Six configurations that differ by the ratio of glazed surface area to opaque surfaces area are studied. A novel configuration that utilizes an inclined front surface is thermally investigated. The effect of orientation of the sunspace, opaque wall and floor absorption coefficients and number of glass layers on the thermal performance is evaluated. Results show that the sunspace reduces the heating load during the winter, while it creates a serious overheating problem during summer. The contribution of reducing heating requirements increases with increasing the ratio of glazed surface to opaque surface area. Also, the optimal contribution was obtained when the sunspace was oriented to the south. Two passive cooling techniques are proposed and evaluated to overcome the summer overheating problem. Additionally, a passive heating technique is proposed to minimize the thermal losses during winter nights. Internal shading and night ventilation successfully minimize the overheating problem. Employing the three passive techniques with sunspace, results show that as high as 42% reductions in annual heating and cooling load can be achieved. Utilizing an inclined front surface with double layer of glass can further reduce heating and cooling load requirements.

Keywords: Green Building-Solar Energy-Passive Heating and Cooling Techniques-Thermal Performance

Research Title: Management accounting practices’ adoption in UK universities

Author: Zaidoon abed Alhatabat, Published Year: 2019

Journal of Further and Higher Education,

Faculty: Business

Abstract: The aim of this empirical study was to explore the extent and the determinants of management accounting practices’ (MAPs) adoption in UK universities. In this vein, the current study serves as a ‘stock-take’, first reference study for future studies investigating the effects and impact of HE funding changes on accounting systems and practices in universities. In order to contribute to understanding the determinants of MAPs’ adoption in the UK HE sector, a theoretical framework consisting of contingency theory, institutional theory and particular organisational attributes was adopted. A questionnaire survey was distributed to all 125 UK universities, of which eventually fifty-nine fully completed questionnaires, which represents 47% of all UK universities, were collected. Almost all institutions have implemented MAPs relating to cost determination and financial control, and information for management planning and control. The regression analysis concludes in a final model, which includes only seven of the initial twenty-nine variables. Prospector strategy orientation, innovative culture, trialability, mimetic and normative institutional factors and type of university are determined as the predictors of enhanced MAPs in UK universities. The findings of the current study are useful for consideration when looking into adopting new management accounting practices at Higher Education institutions.

Keywords: Contingency theory, new institutional sociology, management accounting practices, UK higher education, attributes

Research Title: Educating digital natives for the future: accounting educators’ evaluation of the accounting curriculum

Author: Zaidoon abed Alhatabat, Published Year: 2018

Accounting Education, 27

Faculty: Business

Abstract: The global digital revolution has irrevocably transformed societies and industries. The accounting profession is predicted to experience a significant change in the future, due to technological developments. Practices will be automated and related positions obsolete, thus accounting graduates need to be educated for new and different tasks and positions. The current study focussed on these expected changes and how accounting profession, practice and, consequently, education will be affected and adjusted to these new technologies in an evaluation approach. A qualitative methodology was employed, investigating accounting educators’ perceptions of these developments. Semi-structured interview data and online accessible empirical data, such as podcasts, were analysed in two coding cycles. The findings illustrate that while significant changes are expected, participants’ opinions vary regarding the necessity of adjusting the accounting curriculum. Supportive changes include amending respective courses to emphasise classic skills, such as problem-solving, and contemporary skills, such as new technologies, to illustrate developments practically.

Keywords: Accounting education, new technology, future of accounting profession, developmental evaluation, digital natives: Gen X and Gen Z

Research Title: Boosting Aircraft Efficiency by Reversing the Load on the Horizontal Stabilizer

Author: Mustafa Awwad Al Khawaldeh, Published Year: 2019

nternational Journal of Recent Technology and Engineering (IJRTE), Volume-8

Faculty: Engineering and Technology

Abstract: his work aims at finding how reversing the direction of THS force improves aircraft performance. In most airplanes, the trimmable horizontal stabilizer (THS) is subjected to downward air force. This downward force acts in the same direction as the weight and opposite to the lift. The produced extra lift can be used to increase the payload orextend the range of the aircraft by carrying more fuel.The proposed design is based on shifting the wings location forward in order to make the force on the THS upward instead of downward. However, the stability of the airplane will be adversely affected. To address this issue, modern control theory is applied to the airplane elevator so as to maintain longitudinal stability. An airplane model based on longitudinal dynamics was used to investigate the stability of the airplane. Both current and proposed designs are simulated first without controllers and then with active controllers. The longitudinal dynamics’ equations are used to design the controllers so as to make the aircraft stable. The payload gain due to the proposed design is calculated; For a typical airliner, it is found that up to 21% increase in payload can be achieved using the proposed design. The proposed design where the load on the THS becomes upward instead of downward results in improving flight efficiency; that is, we can choose betweenincreasing payload, extending the range, reducing the thrust, or using a smaller wing, or any combination of these benefits. In all these cases, there is an operational advantage. This advantage is translated to cost savings or higher revenues.

Keywords: Aircraft control and stability, Aircraft fuel saving, Aircraft payload, Aircraft, Trimmable horizontal stabilizer

Research Title: Simulation-based Assessment of Quadrotor Linear Control Schemes

Author: Mustafa Awwad Al Khawaldeh, Published Year: 2019

Faculty: Engineering and Technology

Abstract: This work aims at finding the most suited control scheme for a typical quad-rotor. Selecting the appropriate controller is essential to achieve system stability.The most common control schemes are compared in terms of their performance in hovering mode. The quad-rotor propellers are modeled based onbothmomentum theory andblade element theory. The model describing the six-degrees of freedom system is used to develop a control strategy using different types of controllers such as PID, Fuzzy, Optimal, LQ), as well as LQRcontroller. The current work is confined to linear control schemes in hovering flight mode, where the comparison is based on achieving stable attitude in hovering. The simulation results show that the LQR controller is the most efficient control method to minimize the steady-state error.

Keywords: Modeling and simulation, quad-rotor control, fuzzy-PID logic, LQR control

Research Title: Influence of Sampling Period on Harmonics of Three- Phase Space Vector Modulated Inverter

Author: Mustafa Awwad Al Khawaldeh, Published Year: 2016

Current Journal of Applied Science and Technology(British Journal of Applied Science & Technology), 17

Faculty: Engineering and Technology

Abstract: The three- phase inverter is driven by a number of semiconductor switches for obtaining three-phase output of nearly sinusoidal fundamental voltage. The purpose of the Space Vector Modulation (SVM) technique is to produce three-phase load voltages of fewer harmonics. It can be reached by selecting an appropriate sampling period for the desired circular locus. This paper endeavors to present the influence of the sampling period on inverter output voltages and their harmonics. Simulation results are presented to assess the inverter performance for different values of sampling periods. The results conclude that an optimum inverter output voltage is achieved when the given circular locus of space vector is sampled at a period equals the half interval between of the two adjacent space vectors.

Keywords: Inverters; PWM inverter; SVM inverter; power electronics.

Research Title: Performance-Weight Trade for Thermal Management Systems of Lithium-Ion Batteries

Author: Mustafa Awwad Al Khawaldeh, Published Year: 2018

JJEE Jordan Journal of Electrical Engineering, Volume 4, Number 4,

Faculty: Engineering and Technology

Abstract: The most important factor limiting the efficiency of Lithium-ion (Li-ion) batteries is their thermal performance. Therefore, the analysis of battery thermal management (BTM) of this type of batteries is of a great interest. This work aims at evaluating the effectiveness of different types of passive and active BTM systems. The electro-thermal behavior of the battery pack is characterized using 3D finite element method (FEM) modeling. The heat generation rate of battery cells during utilization is determined, so that the thermal behavior of the battery pack can be evaluated. The different BTM solutions are evaluated to determine the improvements in the pack thermal behavior. For further improvements, a new mixture of phase-change materials (PCM) is proposed and simulated. The mixture contains 75% of hydrogel and 25% of paraffin wax (PW). The results show that the mixture enables reducing the weight of the BTM material while slightly reducing performance. The end result is reducing the operating cost of the system especially for aerospace applications due to the reduced weight, which is the most important factor. In addition, cooling can be enhanced by the wind.

Keywords: Hydrogel, Li-ion battery, PCM, paraffin wax, thermal management, weight reduction.

Research Title: Mechatronics Engineers’ Perception of Code Mixing: Philadelphia University and Hashemite University as a Case Study

Author: Mustafa Awwad Al Khawaldeh, Published Year: 2016

International Journal of Applied Linguistics and English Literature, 5

Faculty: Engineering and Technology

Abstract: It has recently been widely recognized that code-switching is prevalent in Jordanians' daily conversation in various situations such as home, cafés, universities, restaurants and clubs. Abalhassan and Alshalawi (2000: 183) made a very related observation on code switching behavior among Arab speakers of English that “without exception, all respondents switched into English to some degree”. This could be referred to the increase number of technological advances and people travelling across countries for pleasure or for pursuing further education. In light of this observation, the crucial role of language in people's life, ambivalent attitudes towards code-switching (Akbar, 2007), the dearth of research in this area, such a present study is required to explore Jordanian university students’ and instructors’ perceptions of code-switching in their daily classroom conversation and its expected impact on their language proficiency. In particular, it investigates the factors leading them to code mix and their underlying attitudes towards its expected future impact on their language proficiency. To the best knowledge of the present researcher, this study is the first of its kind in Jordan. Data was collected via semi-structured interviews and a questionnaire from 70 university students and 30 instructors from both Philadelphia University and the Hashemite University. Data revealed that code mixing between English and Arabic is a common phenomenon in lectures they have attended in their academic institutions. The participants also show that they find code mixing fascinating and believe that though code switching might have a positive impact on their learning as it helps them better understand the topic. The instructors revealed that code mixing fulfill a set of functions that serve the educational process.

Keywords: Arabic-English codeswitching, language attitude, bilingualism, language proficiency

Research Title: Hydrodynamics of Cerebrospinal Fluid and Drug delivery in a model of the Human Ventricular system

Author: Shatha Ammourah, Published Year: 2004

ODE, 4

Faculty: Engineering and Technology

Abstract: Hydrodynamics of Cerebrospinal Fluid and Drug delivery in a model of the Human Ventricular system had been studied numerically.

Keywords: CSF, CFD, velocity vectors, drug

Research Title: A 2-D simulation of hydrocephalus in the Foramens of Monro of the human ventricular system

Author: Shatha Ammourah, Published Year: 2004

The12th CFD conference, Canada

Faculty: Engineering and Technology

Abstract: NA

Keywords: Foramens of Monro , 2-D simulation of hydrocephalus