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This paper aims to propose an analytical model for the harmonic content no-load magnetic fields and Back electric motive force (EMF) in double-sided TORUS-type non-slotted axial flux permanent magnet (TORUS-NS AFPM) machines with surface-mounted magnets considering the winding distribution and iron saturation effects.

First, a procedure to calculate the winding distribution with a rectangular cross-section is proposed. The magnetic field distribution and magnetic motive force (MMF) drop due to saturation in iron cores are then exactly extracted in a 2-D analytical model. The consequent influence on air-gap magnetic field and Back EMF are also calculated using a new iterative algorithm. The results are compared with those of the conventional analytical model without saturation, 2-D finite element analysis (FEA) and an experiment on a fabricated prototype machine.

Unlike the conventional method, the new method yields the no-load magnetic field distributions in air-gap and iron cores and Back EMF very exactly such that the results well match to those of the FEA and experiment.

Unlike the conventional winding factor, the winding distribution is considered here along the both axial and circumferential directions, which improves the accuracy level of results for non-slotted structures with relatively large air-gaps. The magnetic field distribution and MMF drop-in iron parts are also calculated as the basis for exact recalculation of air-gap magnetic field and Back EMF. Because of small computational burden beside superior accuracy, the proposed model can be treated as an accurate and fast substitute for FEA to be used during the design procedure or for predicting the other performance characteristics of TORUS-NS AFPM machines.

In this paper, a new structure for the permanent magnet hysteresis synchronous (PMHS) motor is introduced. Moreover, this paper aims to presents a new analytical method for modeling of a disc-type PMHS motor.

Because the hysteresis and permanent magnet motors have unique characteristics, a motor (the PMHS motor) with excellent performance features can be achieved by combining them. Choosing a disc-type slotless structure causes the major advantages of both motors to be preserved in the new motor. To analyze PMHS motor, mathematical equations are obtained by using Ampere’s circuital law, flux continuity law and Faraday’s law. Then the air-gap voltage and exciting current of the motor can be calculated. To implement this method, a new iterative algorithm is proposed. This algorithm consists of one-iteration loop for each input voltage to find the maximum flux density of the operational hysteresis loop of the motor.

Validity of the analytical approach is confirmed by experimental results. A reasonably close agreement between the two is shown and some outstanding performances of the PMHS motor are demonstrated.

A new structure for PMHS motor and also a new analytical method for performance prediction of this motor is presented.

This study aims to design the rotor geometry of switched reluctance motor (SRM) in a completely flexible way. In the proposed method, there is no default geometry for the rotor. The initial geometry of the rotor can start from a circle or any other shape and depending on the required performance takes the final shape during the optimal design. In this way, the best performance, possible with geometric design, can be achieved.

The rotor boundary of a 4/2 SRM is defined by a few B-splines. Some control points are located around the rotor and changing their locations causes customized changes in the rotor boundary. Locations of these points are defined as design variables. A 2-D finite element analysis using MATLAB/PDE is applied to the SRM model and sensitivity analysis is used to optimization design by means of minimizing of objective function.

The proposed method has many more capabilities for matching different objective functions. For the suggested objective function, while the conventional rotor torque profile difference with the desired torque profile reaches 40%, this difference for B-spline rotor is about 17%. Experimental results from a prototype motor have a close agreement with analysis results.

The B-splines have been used to design machines and electromagnetic devices. However, this method is used for the first time in design of the whole rotor of a SRM.

Consideration of leakage fluxes in the preliminary design stage of a machine is important for accurate determination of machine dimensions and prediction of performance characteristics. This paper aims to obtain some equations for calculating the average air gap flux density, the flux density within the magnet and the air gap leakage flux factor.

A detailed magnetic equivalent circuit (MEC) is presented for a TORUS-type non-slotted axial flux permanent magnet (TORUS-NS AFPM) machine. In this MEC, the leakage flux occurring between two adjacent magnets and the leakage fluxes taking place between the magnet and rotor iron at the interpolar, inner and outer edges of the magnets are considered. According to the proposed MEC and by using flux division law, some equations are extracted. A three-dimensional finite element method (FEM) is used to evaluate the proposed analytical equations. The study machine is a 3.7 kW and 1,400 rpm TORUS-NS AFPM machine.

The air gap leakage flux factor, the average air gap flux density and the flux density within the magnet are calculated using the proposed equations and FEM. All the results of FEM confirm the excellent accuracy of the proposed analytical method.

The new equations presented in this paper can be applied for leakage flux evaluating purposes.

The purpose of this paper is to describe a new method for selective harmonic elimination in a two-level three-phase inverter-fed direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drive to suppress unwanted resonant frequencies.

The design methodology is based on random space vector pulse-width modulation (RSVPWM) of PMSM drives. MATLAB simulations support the validity of suggested structure.

The simulation results of the proposed algorithm exhibit the development of a proper gap at the selected frequency in the frequency spectra of the motor input currents and voltages as well as lowering the ripples in the PMSM electromagnetic torque, stator current and flux linkage responses in compared with traditional DTC.

The proposed algorithm is a revised form of the RSVPWM technique used in a closed-loop structure along with a sliding mode speed controller which is capable to deal with nonlinear motor loads in an online manner. This study can be beneficial for the designers of AC motor drive system who attempt to find a modulation method that can create a selective gap in the power spectrum density of the motor input voltages and currents, therefore, promote an acoustically pleasant drive or alleviate unwanted motor vibrations.

The integrity of heritage and landscape hinges on protection and restoration policies. Such policies are implemented through the determination of buffer zones that most of them are mainly based on the self-absorbed view, which isolates cultural sites from the community, instead of the more inclusive perception-based view. This study used perceptions as a base in identifying buffer zones in Anahita Temple, in comparison with previous study.

Accordingly, two parallel and qualitative methods were implemented. First, the site inventory approach was used to determine physical buffer zone, and then historical and temporal perceptions were used to determine a perception-based one. In addition, integrated buffer zone was defined based on two approaches. Finally, the participatory importance and performance analysis were proposed in order to conservation strategies formulation.

The results indicated that a physical buffer zone isolates the historical site from its landscape, thereby presenting challenges. By contrast, constructing a perception-based one not only maintains the integrity of the landscape but also creates correspondence between the landscape and people's mental map of the site.

Maintaining the site's integrity is expected to encourage participation from the local community and fuel more effective conservation efforts but it also introduces challenges given the need to impose new regulations.

Despite various studies on role of perception in Historical Landscape, less attention has been paid to the role of perception in definition of heritage buffer zone. Therefore, the main goal is to develop a framework to determine the buffer zone of heritage sites by providing a sample.

This study aims to examine the effect of the main corporate governance characteristics on compliance with accounting and auditing organisation for Islamic financial institutions’ (AAOIFI) governance standards’ (GSs) disclosure requirements by Islamic banks (IB) that adopt AAOIFIs’ standards in Bahrain, Qatar, Jordan, Oman, Syria, Sudan, Palestine and Yemen.

The sample consists of 486 bank-year observations from 2009 to 2017.

The findings reveal that compliance with AAOIFIs’ GSs’ disclosure requirements is positively influenced by the audit committee (AC) independence, AC’s accounting and financial expertise and industry expertise, auditor industry specialisation, IB’s size and IB’s listing status. On the other hand, it is negatively influenced by the ownership concentration.

This study has only examined compliance with AAOIFI’s GSs’ disclosure requirements and has focussed on one major sector of the Islamic financial institutions (which is IB).

The findings are useful for various groups of preparers and users of IBs’ annual reports such as academics and researchers, accountants, management of IBs and some organisations.

While the study of the AAOIFIs’ standards has grown contemporary with considerable contributions from scholars, however, the majority of these studies are descriptive in nature. Indeed, the existing literature that has explored the determinants of compliance with AAOIFI’s standards is in the early research stage. To the best of the knowledge, there is a paucity of empirical research testing this issue.

Institutional changes, in a historical context, through simultaneous evolutionary and metamorphic processes either deform or reform long-enduring institutions. The chapter delves into the Persian history from the early days of the reign of Nāṣer al-Dīn Shāh-e Qājār in 1848 to the recent years and traces Persian institutions' historical transformations, which culminated to the Persian women entrepreneurship. Thus, the chapter first sets the historical context in each period and then sheds light on the pivotal issues of each period's women. The undergirding base of the discussions is the assumption of the change in institutions as natural metamorphosis in the animate. Finally, the discussions contribute to the conceptualization of the Institutional Triangulation and in the case of Persia, a cultural-driven triangulation, which has paved the way to the formation of a stupendously hegemonic patriarchal and masculine sociopolitical economy in Persia, that has historically affected women's institutionalization, subjugation, subordination, marginalization, socialization, emancipation, and most recently Islamization phases.

This study aims to investigate the effect of Lean Six Sigma elements on the Jordanian Pharmaceutical Manufacturing organizations’ business performance.

Data were collected from 120 managers out of about 300 managers by means of questionnaire. After confirming normality, validity and reliability of the study tool, correlation analysis was carried out, and then multiple regressions were used to test the hypotheses.

The results show that there is an agreement on high implementation of Lean Six Sigma variables among Jordanian Pharmaceutical Manufacturing organizations; there are strong relationships among Lean Six Sigma variables, except between non-utilized talent and transportation; there are strong relationships between Lean Six Sigma variables and business performance. All Lean Six Sigma variables have effect on business performance, except extra processing and waiting time.

This study was carried out on the pharmaceutical industry in Jordan, generalizing results of one industry and/or one country to other industries and/or countries may be questionable. Extending the analyses to other industries and countries represents future research opportunities.

Implementing Lean Six Sigma variables in all Jordanian Pharmaceutical Manufacturing organizations can improve their business performance; also, it can be applied to other manufacturing industry.

The aim of all organizations is to reduce waste, which leads to reserve the natural resources, which is considered as a corporate social responsibility.

Only few studies related to Lean or Six Sigma have been carried out in pharmaceutical industry in Jordan. Therefore, this study might be considered as an initiative study, which studies the effect of both Lean and Six Sigma on pharmaceutical industry in Jordan.

This study aims to investigate the effect of the ownership structure types on the indicators of the external audit quality, in the light of the weak legal protection of the shareholders.

This study used the panel data of 94 listed Jordanian companies from 2009–2018 and the fixed-effect method.

The results revealed a significant relationship between the directors’ ownership, family and institutional ownership with the audit quality. By contrast, the managerial ownership had an insignificant influence on audit quality.

The results show the important role played by the directors’ and institutions’ ownership in ensuring the audit quality in Jordan. The results have implications for the policymakers in Jordan, to encourage and support the participation of such types of the investors and provide an effective monitoring over other types of ownership in the Jordanian capital markets.

This study suggests that the ownership structures are an essential and effective determinants of the external audit quality, which ultimately affects the performance and financial statements.

These results are consistent with prior studies, which have indicated a significant relation between ownership structure and the demand of the audit quality, even in a setting where legal protection of the shareholders plays essentially no role. To the best knowledge of the researchers, this study is one of the few studies that separates the ownership by the directors into two separate types. Further, this is the first study that used several indicators to measure the audit quality at the same time.