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The purpose of this paper is to investigate the influence of stator and rotor pole number combinations together with the flux-barrier layers number on the performance of synchronous reluctance machine with emphasis on output torque capability and torque ripple.

AC synchronous reluctance machine (SynRM) or permanent magnet assisted SynRM presently receives a great deal of interest, since there is less or even no rare-earth permanent magnet in the rotor. Most of SynRM machines employ a stator that is originally designed for a standard squirrel cage induction motor for a similar output rating and application, or the SynRM machine with 24-slot, four-pole are often directly chosen for investigation in most of the available literature. Therefore, it is necessary to investigate the influence of stator and rotor pole number combinations together with the flux-barrier layers number on the performance of SynRM machine with emphasis on output torque capability and torque ripple.

The average torque decreases with the increase of the pole numbers but remain almost constant when employing different stator slot numbers but with the same pole number. In addition, the torque ripple decreases significantly with the increase of the stator slot number. The machine with double-layer flux-barrier in the rotor has the biggest average torque, while the machines with three- and four-layer flux-barrier in the rotor have almost the same average torque but their value is slightly smaller than that of machine with double-layer flux-barrier. However, the machine with three-layer flux-barrier has the lowest torque ripple but the highest torque ripple exists in the machine with double-layer flux-barrier.

The purely sinusoidal currents are applied in this analysis and the effects of harmonics in the current on torque ripple are not considered in this application.

This paper has analyzed the torque ripple and average torque of SynRMs with considering slot/pole number combinations together with the flux-barrier number.

Numerical and analytical solutions of the carrier continuity equation are found for the problem of charge transfer in charge‐coupled devices in the presence of potential barriers. The analytical solution is for a rectangular potential barrier and is useful for obtaining a qualitative understanding of charge transfer over a potential barrier. Numerical results show that the charge transfer inefficiency is strongly affected when the shape of the potential barrier is varied and the height of the potential barrier remains fixed.

The purpose of this paper is to present research findings on the experience of career barriers by women who have changed career, and to suggest the practical implications of these findings for career management.

An established, qualitative methodology, interpretative phenomenological analysis, was used to explore participants' experiences. Semi‐structured interviews were conducted with eight women who had changed careers and were analysed to identify the salient themes.

Participants experienced career barriers, but their subjective experience did not necessarily match objectively defined barriers. One participant, for example, experienced redundancy not as a barrier to her career path but as an opportunity. It was only when situations or events threatened the self‐concept that problems were experienced as barriers. These barriers were not insurmountable and participants used a number of strategies to overcome potential barriers.

The findings suggest that career management or counselling should acknowledge and explore the client's subjective experience of career barriers. Strategies such as challenging or reframing potential barriers can be effective methods for helping clients to dismantle them.

This research points to the gap in career theory and research on the experience of barriers in adult careers. It presents evidence on the subjective nature of barriers and on strategies used to overcome them.

The aim of this paper is to describe the Polish empirical studies of information barriers. The focus is to highlight the hierarchy of barriers, and the relation between demographic variables (sex, age, discipline etc.) and perception of barriers.

After a deep literature review some empirical studies have been conducted. Respondents were divided into groups in terms of: sex, field of study (social sciences, human sciences, natural sciences and technical sciences), age, science degree and year of study. In analysis of data two statistical methods: analysis of variance (ANOVA) and a chi‐square test (χ²) were used.

The phenomenon of information barriers is very common, encountered by around 80 per cent of users. The most troublesome barriers were barriers connected with libraries. The study showed that the sex variable had varied the respondents' answers to the greatest extent. The women perceived information barriers as a more serious problem than men (p<0.001). With regard to types of discipline, the faculty group found information barriers more troublesome in such disciplines as humanities and social sciences than in natural or technical sciences (p=0.001).

The hierarchy of barriers obtained from the study is related to a particular environment, a given group of users, the equipment of home library.

Studies of this subject may prove valuable in identifying people that are likely to experience difficulties in access to information.

The knowledge of the relation between demographic variables and perception of barriers, in earlier literature, was fragmentary. Findings may lead to a better understanding of the information barriers phenomenon by librarians and library users as well.

The purpose of this paper is to reduce the torque ripple but not to decrease the average torque of synchronous reluctance machines by using one step or more than two axially laminated rotors with asymmetric flux-barrier.

A 24-slot four-pole synchronous reluctance machine with overlapping windings and asymmetric flux-barrier in the rotor is, first, described and designed by finite element (FE) method for maximizing average torque. The dimensions of asymmetric flux-barrier including the pole span angle and flux-barrier angle will be optimized to minimize the torque ripple and its influence on the average torque is also investigated by FE analysis. The impact of current angle on the average torque and torque ripple are also analysed. The step laminations together with the asymmetric flux-barrier are employed for further torque ripple reduction which can consider the both rotation directions.

The torque ripple of synchronous reluctance machine can be significantly reduced by employing asymmetric flux-barrier but the average torque is not reduced.

The purely sinusoidal currents are applied in this analysis and the effects of harmonics in the current on torque ripple are not considered in this application. The 24-slot/four-pole synchronous reluctance machine with single-layer flux-barrier has been employed in this analysis, but this work can be continued to investigate the synchronous reluctance machine with multilayer flux-barrier. This asymmetric flux-barrier can be easily applied to permanent magnet (PM)-assisted synchronous reluctance machine and the interior PM machine with flux-barrier in the rotor, since the space which is used for PM insertion is the same as the SynRM machines.

This paper has analysed the torque ripple and average torque of synchronous reluctance machines with asymmetric flux-barrier and step laminations with asymmetric flux-barrier. The torque ripple can be reduced by this flux-barrier arrangement. The difference of this technique with the other techniques such as stator/rotor skew is that the average torque can be improved.

The objective of this paper is to report results from a Canadian-based study addressing systems-level barriers that restrict the employment of persons with vision loss, specifically in the experience of searching for and maintaining competitive employment. This paper aims to generate knowledge which may inform strategies and advocacy efforts to enhance opportunities for, and experiences of, paid employment for persons with vision loss.

This constructivist, grounded theory study used in-depth, semi-structured interviews with seven participants with restricted vision (those who are legally blind) to frame data collection and analyses.

Three interconnected themes emerged: facing and negotiating barriers, the cyclical process of seeking and keeping employment and settling for second best. Participants described barriers to employment that have been described in previous literature that not only continue to exist, but that act to potentiate one another, resulting in settling for competitive employment experiences that are second best. This represents a type of social injustice that has been previously described as ‘occupational injustice’. We explain this concept and link it to participants’ experiences.

This was a small, geographically bounded study. Nonetheless, the findings resonate with previous research and further our understanding regarding how barriers are experienced.

Knowledge gained furthers the understanding of how systemic obstacles restrict and bound the participation of persons with vision loss in the labour market.

While the barriers to employment for persons with low vision have been previously well described, this paper demonstrates how these barriers interact and act synergistically with one another, thereby reinforcing the need to focus on shortcomings at the service, system and policy level, in addition to individual rehabilitation.

Six million Iraqis were displaced during the Iraq-Daesh War, and although many have returned to their communities, there remain approximately 1.3 million internally displaced persons (IDPs) across the country. Today, approximately 25% of IDP children in Iraq are out of school (REACH, 2020). This study foregrounds the voices and family histories of IDPs when navigating educational access and makes a methodological argument for the need for increased qualitative research in post-conflict settings. Using the conceptual framework of navigation, the author presents displaced persons as agentic, dynamic people with lived histories, present realities, and imagined futures which inform their journey through the education system. Semi-structured interviews with 16 IDPs who identified as parents or caregivers were conducted virtually. Displaced Iraqis value education for different reasons, ranging from basic literacy to employment to societal improvement. In doing so, the author challenges the barrier-dominant framework through which IDP educational access is often understood and nuanced with a temporal lens which requires us to identify IDPs as (1) persons capable of making choices for themselves, (2) givers as well as receivers, and (3) persons who aspire to goals beyond basic survival.

The purpose of the paper is to analyse the sequence of forces acting as barriers in the usage of drones in the construction industry using interpretive structural modelling (ISM). The usage of drones in the construction industry is brought out phase-wise with the help of literature and live cases. Barriers to the usage of drones in construction and steps to derive the interaction between them are described in detail.

The extraction of barriers to the usage of drones in construction is done through cases and supported by the literature. The identification of the interaction between the barriers is done through multi-criteria decision models, namely, ISM and Matriced Impacts Croises Multiplication Appliquee a un Classement (MICMAC) and the results are presented in the form of a hierarchical structure. The paper highlights the potential for the usage of drones in every phase of construction across three stages of construction and eight different applications.

The findings on the interaction between barriers show that technical and research and development-related barriers have a higher driving power, ultimately influencing negativity among stakeholders in drone usage for construction. By analysing interrelationships between barriers, management can frame suitable strategies to adopt drone usage in projects. Awareness about the strength of certain barriers can help management take steps to mitigate the same.

By analysing interrelationships between barriers, management can frame suitable strategies to adopt drone usage in projects. A major limitation is a restriction of the study area to the Indian subcontinent. However, the authors believe that the results can be applied across countries where drone technology is at the nascent stage.

Awareness about the strength of certain barriers can help stakeholders take steps to mitigate the same.

The results of this research also give some inputs to the government’s drone policy for wider usage of drones in the construction industry.

To the best of the authors’ knowledge, most studies on drones in construction industry bring out a list various challenges to their adoption. In this study, the authors have gone further to perform a hierarchical sequencing of barriers to drone adoption based on challenges faced in an emerging economy like India.

This paper aims to investigate research activity on barriers for minority and underserved groups to access and use mental health services.

Using Scopus, relevant articles published from 1993 to 2022 were collected. The final list included 122 articles.

Research hotspots included cultural and ethnic barriers, obstacles encountered by LGBTQ+ individuals, challenges faced by refugees and immigrants, limited access in rural areas and barriers affecting special populations. The top 10 cited articles focused on language barriers, cultural stigma, gender-specific challenges and systemic obstacles. New research avenues included the role of technology in overcoming barriers to access mental health services.

Policymakers and practitioners can use this knowledge to develop targeted interventions, enhance cultural competence, reduce stigma, improve rural access and provide LGBTQ+-affirming care, ultimately promoting equitable mental health care.

This research underscores the importance of addressing mental health service barriers for equity and social justice. Neglecting these disparities can worsen mental health, increase health-care costs, reduce productivity and lead to higher social welfare expenses, perpetuating disadvantages.

This paper's uniqueness lies in its comprehensive analysis of barriers and facilitators to mental health service utilization among minority and underserved groups. It serves as a basis for developing evidence-based strategies to improve service accessibility and enhance the well-being of marginalized communities.

This article aims at - exploring and prioritizing the barriers to adoption of digitization in supply chains (SCs), categorizing them into sustainability triple bottom line (STBL) based upon their direct impact and suggesting digital technologies to address each barrier.

A five-phase methodology is used which consists of an exploration of 44 barriers to the adoption of digitization in SCs, analysis of 44 barriers for mean, standard deviation and Cronbach alpha based on questionnaire-based feedback of 25 experts, extraction of 10 most significant barriers through 05 experts, followed by categorization of the barriers into STBL referring to their direct impact on STBL, prioritization of ten barriers using Fuzzy Technique for Order Performance by Similarity to Ideal Solution and recommendation of digital technologies to address each barrier.

While all the barriers considered in this study significantly impede the adoption of digitization in SCs, lack of top management commitment (B1) is found to be most crucial while lack of culture toward use of information and communication technology required for digitization (B3) has minimum impact. Large investment in digital infrastructure (B6), difficulty in integration of cyber physical systems (CPSs) on varied platforms (B8) and lack of experts having knowledge of digital technologies (B2) are equally important barriers requiring more attention while adopting digitization in SCs.

This study is mainly based on feedback from 25 seasoned experts; a wider cross section of experts will give more insight.

The outcomes are very significant for organizations looking to adopt digitization in their SCs. Simultaneous consideration to all the barriers becomes impractical hence prioritization of same will be useful for the SC managers to benchmark their preparedness and decide strategies for the adoption of digitization with due consideration toward the impact of barriers on STBL. The digital technologies recommended will further aid in planning the digital strategies to address each barrier.

A unique approach to explore, analyze, prioritize and categorize the barriers to adoption of digitization in SCs is used to provide a deeper understanding of factors deterring the same. It implies that a supportive top management along with systematic allocation of finances plays a crucial role. The importance of availability of digital experts for integrating CPSs on a single platform is also highlighted. The digital technologies recommended will further assist the organizations toward adoption of digitization in SCs with due consideration to STBL.