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Article
Publication date: 4 August 2021

Hassan Dahmardeh, Mahmood Ghanbari and Seyed Mehdi Rakhtala

The purpose of this paper is to develop a combined control (CC) technique based on the direct torque control (DTC) strategy and vector control (VC) method, to improve the…

Abstract

Purpose

The purpose of this paper is to develop a combined control (CC) technique based on the direct torque control (DTC) strategy and vector control (VC) method, to improve the overall performance of a three-phase induction machine (TPIM) drives.

Design/methodology/approach

The proposed control scheme includes a table-based DTC strategy in connection with a proportional-integral-sliding mode controller and pulse width modulation switching strategy. The control system has merits of DTC technique such as simple structure, less dependent on machine parameters, fast dynamic response and merits of VC technique such as high accuracy and constant switching frequency.

Findings

To validate the effectiveness of the proposed control system, simulation and experimental studies are carried out for a 0.75 kW TPIM in different operating conditions. The achieved results show the superiority of the proposed method in terms of fast dynamics and simple structure compared to the VC strategy and low speed and torque ripples and constant switching frequency compared to the DTC method.

Originality/value

Compared to the conventional CC strategies, the control law of the proposed method is based on DTC theory and modulation is established based on VC. In other words, the variable switching frequency which is one of the main disadvantages of the conventional CC strategies is rectified using the proposed CC scheme.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 40 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 15 January 2021

Hamid Zarei, Hassan Yazdifar and Farideh Soofi

After graduation, many female accountants tend to ordinarily have professional work experience to obtain an ideal position in the career; but under the influence of both…

Abstract

Purpose

After graduation, many female accountants tend to ordinarily have professional work experience to obtain an ideal position in the career; but under the influence of both internal (in the profession) and external (in life) adverse conditions, the application of their potential talent would be failed and they cannot utilize their abilities to progress in the career. Relevant studies in this field are in developed countries with minimal attention to females in other countries. This study contributes to the literature by examining the case in a developing country–Iran.

Design/methodology/approach

A mixed-method study was undertaken to gather data by a postal questionnaire distributed in 2016–2017 and structured interviews with females who assuredly have working experience in the corporate finance department of firms listed in the Tehran Stock Exchange.

Findings

It is concluded that the primary issue affecting the career vision of women is to achieve a better working environment. This issue admittedly can be considered as a reason for women to change their employer. The salaries and benefits are also the least important to them. Most women prefer to work in the educational part because of flexible working hours, and they broadly obtain almost no desire to work in the field of tax and cost accounting.

Research limitations/implications

When answering the questionnaire or during the interviews, women are supposed to think about events that happened in the past, so it is recognized that they may selectively remember such events and interpret them with reference to the intervening events and the values that they hold at the time of the data collection. Moreover, all selected respondents may be naturally influenced by a desire to provide socially acceptable answers. Accordingly, the inherent limitations of the results are acknowledged. However, the prime focus of this paper is to consider and give voice to the female experience, which may or may not replicate the experience of their male counterparts.

Practical implications

This paper contributes meaningfully to the debate on the issues affecting the career vision of women and may result in their departure.

Originality/value

The impact of the dual work–life burden of women on career progression is assessed which contributes to the extant literature on the career progression of women in the context of developing countries such as Iran.

Details

Journal of Applied Accounting Research, vol. 22 no. 2
Type: Research Article
ISSN: 0967-5426

Keywords

Open Access
Article
Publication date: 9 December 2020

Mohamed Saih Mahfouz, Suhaila Abdalkarim Ali, Haya Ahmed Alqahtani, Amani Ahmad Kubaisi, Najla Mohammed Ashiri, Eshrag Hassan Daghriri, Shaima Ali Alzahrani, Azhar Ahmed Sowaidi, Afnan Mousa Maashi and Doa’a Albarag Alhazmi

The purpose of this study is to assess the prevalence of burnout syndrome and its associated factors among medical students at Jazan University, Jazan, Kingdom of Saudi Arabia.

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Abstract

Purpose

The purpose of this study is to assess the prevalence of burnout syndrome and its associated factors among medical students at Jazan University, Jazan, Kingdom of Saudi Arabia.

Design/methodology/approach

A cross-sectional survey was conducted among 440 randomly selected medical students at Jazan University. The questionnaire used for this study was based on the Copenhagen Burnout Inventory.

Findings

The overall prevalence of burnout was estimated at 60.2% (95% CI 55.6–64.8). The prevalence was higher for females (64.1%) than for males (56.2%) but without statistically significant differences (p > 0.05). On average, the students scored the highest averages in the personal burnout category, followed by the study-related and client-related burnout categories. In the multivariate analysis, a lower age (beta = −3.17, p = 0.026), female (beta = −0.896, p = 0.016), and having better burnout knowledge (beta = 0.710, p = 0.025) predict significantly higher personal burnout.

Practical implications

It is necessary to implement strategies to reduce the incidence of burnout among medical students for the sake of a better quality of life for future doctors.

Originality/value

There is a high prevalence of burnout among Jazan’s medical students.

Details

Mental Illness, vol. 12 no. 2
Type: Research Article
ISSN:

Keywords

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