Samira Mohammadi, Ali Ramezankhani, Ali Montazeri, Akbar Nasrollahi and Nastaran Keshavarz Mohammadi
Health-related issues are widely covered in news agencies by medical and health journalists. The quantity, format and quality of their coverage influence the general public as…
Abstract
Purpose
Health-related issues are widely covered in news agencies by medical and health journalists. The quantity, format and quality of their coverage influence the general public as well as policymakers and professions. Current studies and observations suggest that news agencies are more dominated by medical topics (disease, symptoms, epidemiology, treatment and medicines) than general public health issues (risk prevention, health protection, education and promotion). This study explores the causes of the current situation in Iran and generates solutions for supporting health-promoting media that may also prove beneficial for other countries.
Design/methodology/approach
A qualitative study was conducted to explore the coverage of health-related topics in selected news agencies. Stakeholders, including health journalists, health professionals and public relations staff at the Iranian Ministry of Health and Medical Education were interviewed. Data were collected until data saturation was reached. The transcripts of all the 17 interviews conducted were analyzed using conventional content analysis.
Findings
Four groups of causes were identified, including individual factors, organizational factors, socioeconomic factors and the different nature of medicine and public health. The participants proposed several solutions that were classified into three categories, including the empowerment of stakeholders through capacity development, organizational change and mutual communication and culture change.
Originality/value
Creating health-promoting media is a complex but urgent task, and providing a comprehensive and deep understanding of the dynamic interdependencies of the multiple factors at play in it and developing and implementing the most effective interventions for it requires a systematic approach.
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Sayyed Ali Akbar Shahriari, Mohammad Mohammadi and Mahdi Raoofat
The purpose of this study is to propose a control scheme based on state estimation algorithm to improve zero or low-voltage ride-through capability of permanent magnet synchronous…
Abstract
Purpose
The purpose of this study is to propose a control scheme based on state estimation algorithm to improve zero or low-voltage ride-through capability of permanent magnet synchronous generator (PMSG) wind turbine.
Design/methodology/approach
Based on the updated grid codes, during and after faults, it is necessary to ensure wind energy generation in the network. PMSG is a type of wind energy technology that is growing rapidly in the network. The control scheme based on extended Kalman filter (EKF) is proposed to improve the low voltage ride-through (LVRT) capability of the PMSG. In the control scheme, because the state estimation algorithm is applied, the requirement of DC link voltage measurement device and generator speed sensor is removed. Furthermore, by applying this technique, the extent of possible noise on measurement tools is reduced.
Findings
In the proposed control scheme, zero or low-voltage ride-through capability of PMSG is enhanced. Furthermore, the requirement of DC link voltage measurement device and generator speed sensor is removed and the amount of possible noise on the measurement tools is minimized. To evaluate the ability of the proposed method, four different cases, including short and long duration short circuit fault close to PMSG in the presence and absence of measurement noise are studied. The results confirm the superiority of the proposed method.
Originality/value
This study introduces EKF to enhance LVRT capability of a PMSG wind turbine.
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Adeniyi Samson Afolabi, Hafeez Idowu Agbabiaka, Abel Omoniyi Afon, Akinkunle Akintan Akinbinu and Emmanuel Adetayo Adefisoye
Hospital solid waste may cause serious health hazards and impair the quality of life of the community through transmission of diseases and injury if not properly managed…
Abstract
Purpose
Hospital solid waste may cause serious health hazards and impair the quality of life of the community through transmission of diseases and injury if not properly managed. Therefore, the purpose of this paper is to examine solid waste management practice (SWMP) in Obafemi Awolowo University Teaching Hospital Complex.
Design/methodology/approach
Primary data were collected for this study through interview and questionnaire administration. Systematic sampling technique was used to select 60 students, 13 staffs, 43 cleaners, 8 contractors, and a management staff for questionnaire administration. Data obtained were analyzed using frequency distribution, pictorial analysis, and factor analysis.
Findings
Findings established that solid wastes components generated in the hospital were not segregated in line with the directive of the World Health Organization. The study further established that the factors influencing SWMP accounted for 79.9 percent variance in the following proportion: available storage and collection facilities (30.94 percent), number of patients’ factors (17.86 percent), transportation factor (15.39 percent), human and material resource factors (8.33 percent), and disposal (7.36 percent).
Originality/value
The study therefore concludes that the effectiveness of SWMPs depends on the facilities and equipment, human resources capacity, and frequency of waste collection and disposal.
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Fatemeh Ebadi, Mohammad Mardaneh and Akbar Rahideh
This paper aims to show the proposed energy method for inductance calculation is valid for any number of poles, phases and any winding layout.
Abstract
Purpose
This paper aims to show the proposed energy method for inductance calculation is valid for any number of poles, phases and any winding layout.
Design/methodology/approach
A two-dimensional (2-D) analytical energy-based approach is presented to calculate self-inductances and mutual inductances of brushless surface-mounted permanent-magnet machines.
Findings
The proposed calculation procedure is valid for brushless permanent-magnet machines with slotted or slotless stator structure. Comparisons between energy method and flux linkage method are presented based on simulation and experimental results. It shows that the energy method has an excellent agreement with the result obtained from finite element method (FEM) and experimental study.
Originality/value
This paper compares energy-based method with flux linkage method and FEM for inductance calculations in slotless and slotted permanent-magnet motors. The relations for inductance calculation are presented which are obtained based on 2-D analytical representation of magnetic field.
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Mensah Prince Osiesi, Fatai Ayiki Azeez, Sunday Ade Adeniran, Oluwayemisi Damilola Akomolafe, Oluwatoyin Tolu Obateru, Chigozie Celestina Oke, Adenike Lucia Aruleba, Adebolu Folajimi Adekoya, Ayodeji Olorunfemi Olawole and Godwin Ayodeji Nwogu
This study intends to add to the existing body of literature and provides a strong advocacy for the use of the computer-mediated corrective feedback by university lecturers in…
Abstract
Purpose
This study intends to add to the existing body of literature and provides a strong advocacy for the use of the computer-mediated corrective feedback by university lecturers in Nigeria and elsewhere. The purpose of this paper is to explore the perceptions and experiences of lecturers toward students' research project supervision using the computer-mediated corrective feedback, factors that facilitate its use, the most preferred computer-mediated corrective feedback types and the extent of its usage in project supervision.
Design/methodology/approach
This research relies on both the Dialectical Theory and the Unified Theory of Acceptance and Use of Technology. This study adopted the interpretivist philosophical paradigm. The case study approach of the qualitative design was used in this investigation. The research participants were selected using the multi-stage sampling procedure. In all, twenty-four (24) lecturers (four from each university, comprising 16 males and 8 females and their ages ranged from 37 years to 61 years) made up the study sample. In-depth interviews were held with these lecturers. The collected data were transcribed and coded and themes were generated based on the responses of research participants using inductive-thematic analysis (ATLAS.ti version 22).
Findings
The results indicated that lecturers' perceptions towards the computer-mediated corrective feedback in students’ research project supervision are positive, as they considered it flexible, speedy and economical. Users' personal and device-related factors affect the deployment of computer-mediated corrective feedback for students' research project supervision. E-mail, WhatsApp and Zoom are the three themes that emerged as computer-mediated corrective feedback types that lecturers adopt while supervising students’ research projects. Therefore, the study recommends that lecturers should take full advantage of computer-mediated corrective feedback in supervising students' research projects in lieu of the Fourth Industrial Revolution. Universities should also provide an enabling environment that facilitates computer-mediated corrective feedback.
Originality/value
Studies (outside Nigeria) have been conducted on CMCF using predominantly the experimental and the quantitative research designs in ascertaining the impact of this mode of feedback on students' writing performances. Other studies examined students' perceptions toward CMCF. However, little or no attention has been given to the use of CMCF in the supervision of students' research project writing, especially in Nigeria. Moreover, calls for more qualitative research into lecturer-student interactions and the assessment of educational issues have emerged in recent times. It is against this backdrop that this study explored university lecturers' perceptions and experiences of CMCF on students' research project supervision in Nigerian universities.
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Navid Mohammadi, Jalil Heidary Dahooie and Mohamadreza Khajevand
With the rapid advancement of technology, companies use new technologies to produce their products and services to maintain a competitive advantage. As companies alone cannot…
Abstract
Purpose
With the rapid advancement of technology, companies use new technologies to produce their products and services to maintain a competitive advantage. As companies alone cannot research and develop their technologies, they should use knowledge sources outside the organization that may exist throughout the world; hence, organizations need technology transfer. Because the success rate of technology transfer projects is low, the need to accurately assess and investigate the critical success factors of technology transfer projects is felt. In this regard, this study aims to identify and prioritize the critical success factors in technology transfer projects.
Design/methodology/approach
In this research, 56 critical success factor (CSF) were extracted from the context of the articles and were adjusted using experts’ opinions in different phases, as well as the fuzzy-Delphi approach. Finally, 15 factors were categorized in the form of steps of the technology transfer model: STAGE-GATE. In the next step, the set of criteria needed to prioritize CFSs was extracted from the literature and finalized with the help of the experts. Then, how each of the CSF influences the identified criteria was scored according to the organization’s export opinions. Finally, the priority of each key success factor was calculated using the additive ratio assessment (ARAS) method.
Findings
The results obtained for prioritization of the critical success factors show that experience in technology transfer in the transferee company, the existence of experienced technology transfer managers, sufficient organizational infrastructure and documenting project problems, achievements and experiences are four critical success factors of the technology transfer projects. Considering the long-term and short-term specific goals of the technology transfer process and the choice of technology in line with the company’s commercial strategy are also the critical success factors with the next priorities.
Originality/value
The combination of ARAS and step-wise weight assessment ratio analysis methods for identifying and prioritizing managerial decisions in the high-tech industries is a value of this research. Also, a combination of novel multi-attribute decision-making methods by the older framework of new product development is another contribution of this research.
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A. Zeeshan, Hamza Javed, N. Shehzad, Sadiq M. Sait and R. Ellahi
This study aims to examine the cilia-driven flow of magnetohydrodynamics (MHD) non-Newtonian fluid through a porous medium. The Jeffrey fluid model is taken into account. The…
Abstract
Purpose
This study aims to examine the cilia-driven flow of magnetohydrodynamics (MHD) non-Newtonian fluid through a porous medium. The Jeffrey fluid model is taken into account. The fluid motion in a two-dimensional symmetric channel emphasizes the dominance of viscous properties over inertial properties in the context of long wavelength and low Reynolds number approximations.
Design/methodology/approach
An integrated numerical and analytic results are obtained by hybrid approach. A statistical method analysis of variance along with response surface methodology is used. Sensitivity analysis is used to validate the accuracy of nondimensional numbers.
Findings
The impact of various flow parameters is presented graphically and in numerical tables. It is noted that the velocity slip parameter is the most sensitive flow parameter in velocity and relaxation to retardation time ratio in temperature.
Originality/value
A model on cilia-generated flow of MHD non-Newtonian Jeffrey fluid is proposed.
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Ghazal Mirzavand and Akbar Rahideh
This study aims to extract an analytical model for five-phase fault-tolerant permanent-magnet vernier machines (FTPMVMs) based on the analytical solution of Maxwell’s equations…
Abstract
Purpose
This study aims to extract an analytical model for five-phase fault-tolerant permanent-magnet vernier machines (FTPMVMs) based on the analytical solution of Maxwell’s equations, which has some advantages than the finite element model.
Design/methodology/approach
FTPMVMs enhance the torque density by combining the vernier characteristics and the fault-tolerant feature. The principle operation of FTPMVMs is discussed based on the magnetic field modulation due to both permanent magnets and armature current. The analytical solution of the magnetic vector potential in each sub-region is obtained based on the sub-domain technique.
Findings
According to the calculated magnetic vector potential, the magnetic flux density, torque, self- and mutual inductance and back-electromotive force are calculated. The FEM is used to validate the results obtained from the proposed analytic model.
Originality/value
Two-dimensional analytical method is used to obtain the electromagnetic model of FTPMVMs.
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Ali Akbar Abbasian Arani and Hamed Uosofvand
This paper aims to investigate the fluid flow and heat transfer of a laboratory shell and tube heat exchanger that are analyzed using computational fluid dynamic approach by…
Abstract
Purpose
This paper aims to investigate the fluid flow and heat transfer of a laboratory shell and tube heat exchanger that are analyzed using computational fluid dynamic approach by SOLIDWORKS flow simulation (ver. 2015) software.
Design/methodology/approach
In this study, several types of baffle including segmental baffle, butterfly baffle, helical baffle, combined helical-segmental baffle, combined helical-disk baffle and combined helical-butterfly baffle are examined. Two important parameters as the heat transfer and pressure drop are evaluated and analyzed. Based on obtained results, segmental baffle has the highest amount of heat transfer and pressure drop. To assess the integrative performance, performance coefficient defines as “Q/Δp” is used.
Findings
This investigation showed that among the presented baffle types, the heat exchangers equipped with disk baffle has the highest heat transfer. In addition, in the same mass flow rate, the performance coefficient of the shell and tube heat exchanger equipped with helical-butterfly baffle is the highest among the proposed models.
Originality/value
After combined helical-butterfly baffle the butterfly baffle, disk baffle, helical-segmental baffle and helical-disk baffle show their superiority of 35.12, 25, 22 and 12 per cent rather than the common segmental baffle, respectively. Furthermore, except for the combined helical-disk baffle, the other type of combined baffle have better performance compare to the basic configuration (butterfly and segmental baffle).
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Ismail Khan, Iftikhar Khan, Ikram Ullah Khan, Shahida Suleman and Shoukat Ali
This study aims to investigate the impact of extensive board diversity on firm performance from the perspective of resource-based view (RBV) theory in the context of Pakistan.
Abstract
Purpose
This study aims to investigate the impact of extensive board diversity on firm performance from the perspective of resource-based view (RBV) theory in the context of Pakistan.
Design/methodology/approach
The analyses are made using a panel random-effects model and generalized method of moment (GMM) across 188 non-financial firms listed in the Pakistan Stock Exchange (PSX) over the period of 2009–2020. The robustness of findings is checked through alternative measurements of the variables and alternative estimation techniques.
Findings
The results show that board members' nationality, ethnicity and educational level diversities are significantly positively related to firm performance. In contrast, age and educational background diversities negatively affect firm performance. However, gender and tenure diversities have an insignificant relationship with firm performance.
Research limitations/implications
This study is conducted in the context of Pakistani firms; thus, the findings may not be generalizable to other economies because different economies have different institutional settings and governance structures.
Practical implications
The policy-makers should encourage the inclusion of board members' nationality, ethnicity and educational level diversities having relevant educational backgrounds to improve firms' competitive performance. The suggested structure of the corporate board may improve firm performance by attracting multiple stakeholders and fulfilling their expectations.
Social implications
The appointment of a director should be based on merit rather than on political connections or personnel relationships to improve social welfare and avoid their negative impact on firm competitive performance.
Originality/value
To the best of the authors' knowledge, this is the first study that investigates the impact of board diversity on firm accounting-based performance and market-based performance in the emerging economy of Pakistan. This study uses RBV theory to provide a unique corporate governance structure based on board diversity, particularly in Pakistan.