Search results

This paper aims to model a three-dimensional twisted geometry of a twisted pair studied in an electrostatic approximation using only two-dimensional (2D) finite elements.

The proposed method is based on the reformulation of the weak formulation of the electrostatics problem to deal with twisted geometries only in 2D.

The method is based on a change of coordinates and enables a faster computational time as well as a high accuracy.

The effectiveness of the adopted approach is demonstrated by studying different configurations related to the IEC 60851-5 standard defined for the measurement of the electrical properties of the insulation of the winding wires used in electrical machines.

In digital education curricular initiatives, some teachers are taking on key roles when appointed as instructional coaches (ICs) and become crucial in the sustainability of the initiative by coaching teachers. This study aimed to find out the difficulties ICs are facing when mentoring teachers in the development of the digital skills and to identify the coaching activities the coaches offer.

Employing a mixed-methods research design focusing on a qualitative approach, the research team conducted 6 focus groups with 38 ICs from 12 primary schools in Switzerland. Quantitative descriptive data were collected through a survey submitted before and after the focus group.

The results indicate that (1) the professional development (PD) activities offered to teachers vary greatly depending on the instructional coach characteristics and the school to which the teachers belong, (2) the in-service training of ICs should include coaching and leadership skills and (3) distributed leadership to ICs could facilitate the adoption of technologies by teachers and support change in the school.

Some ICs offer activities with a low involvement of the teacher. ICs' training programs should provide strategies to better take advantage of PD activities. The authors suggest training ICs in PD activities, aligned with Gibbons and Cobb's (2017) such as analyzing classroom video or lesson study involving a group of teachers working together with an expert to improve a lesson. District and school leaders should provide ICs with explicit guidance and more resources to achieve systemic change. ICs should also be empowered by being involved in the development of the school's continuing education training plans.

This study presents a new perspective about understanding and applying in-service teacher PD in the context of a digital education curricular initiative.

This study investigated how behavioral and emotional forms of engagement are associated with faculty support and student-faculty interactions among engineering students.

Quantitative research methods were used to analyze survey data from 781 undergraduates in seven large undergraduate engineering courses. Linear hierarchical regression models were used to evaluate the relationships between demographics (gender, race/ethnicity, family education, US status and transfer status) and student engagement and between faculty behaviors and engagement.

Faculty support was consistently, significantly and positively linked to all forms of student engagement, while student-faculty interactions were significantly and positively linked to effort and positive emotional engagement and negatively linked to attention and (an absence of) negative emotional engagement. Gender, race/ethnicity, international student status and transfer status significantly predicted at least one form of engagement.

Although this was a single institution study and cross-sectional, the findings suggest that faculty support and student-faculty interactions, while important for engagement, have different effects on different types of students. Faculty and teacher professional development efforts should raise awareness of these differences in order to enhance diversity and inclusion in engineering courses and curricula at all levels.

The analysis of behavioral and emotional forms of engagement represents more of a motivational lens on engagement in contrast to the traditional focus on time-on-task or time spent in fruitful educational practices, as is the norm with much of the engagement literature in higher education.

This study revisits the Great Canadian Grain Logistics Crisis of 2013-14 to explore the competitiveness of the country's grain exports. An approach to comprehending the dilemmas of the international grain supply chain and trade, and national logistics policy in an era of multinational corporations, draws upon the literature on global value chain analysis. This analysis identifies both the grain industry's global and local dimensions. An important literature on the 'politics’ of the supply chain is also called into play to discuss who controls what aspects. This task of interpreting the various steps in Canada's grain logistics chain recognizes the key economic actors - producers, grain companies, railway companies, port terminal operators and export buyers - and political struggles between them as they each seek to maximize their self-interest. Policy implications for streamlining logistics operations are drawn from identifying where changes in the supply chain arrangements have gained or lost opportunities in export markets, particularly in the Asia-Pacific region.

This research aims to examine the educational philosophy of teachers in classrooms. Teachers' educational philosophy influences the power balance, course content function, student and teacher roles, responsibility for learning and assessment purposes and processes. The research also analyzes whether gender, qualification, specialization and experience significantly influence classroom educational philosophies.

The study utilized a quantitative research design, utilizing data from 193 teachers working in a public higher education institution in the Sultanate of Oman. The study utilized a survey method to solicit data from the respondents. Besides utilizing descriptive statistics such as mean and standard deviation, the study used analysis of variance (ANOVA) and t-test to test the hypotheses.

Analysis revealed an instructional strategy's preference, including elements of both teacher-centered and student-centered educational philosophies. Elements of progressivism, constructivism, reconstructivism and perennialism are more relevant in the teacher's instructional design. The results show no significant differences in teachers' pedagogical philosophy that exist based on gender, specialization and experience. However, teachers' age significantly influences their educational philosophy preferences.

This research centers on a public higher education institution in the Sultanate of Oman, with a particular focus on the Department of Business Studies. This resarch delimits its discussion on teachers' chosen educational philosophy. Other possible factors may also impact student retention and effective teaching and learning.

This research offers valuable insights to academicians, higher education administrators, and policymakers. Specifically, this research emphasizes the significance of employing a blended approach, which incorporates both student-centered and teacher-centered educational philosophies, to enhance student engagement, retention, and effective teaching and learning.

This research emphasizes the importance of educators' adoption of a blended educational philosophy in promoting student retention and engagement within higher education institutions. To achieve desirable outcomes, policymakers in higher education must ascertain which educational philosophy is most effective in the classroom. Additionally, ensuring congruence between preferred educational philosophy and teachers’  instructional practices is vital in facilitating effective teaching and learning.

To the best of the authors’ knowledge, this study is the first of its kind among teachers in higher education in the Sultanate of Oman. The outcome of this study helps detail the specific strategies teachers deploy and categorize into various educational philosophies.

A considerable amount of police evaluation research focuses on innovative approaches to reduce crime at places. This is hardly coincidental; policing and place-based scholars have found crime is highly concentrated, and when police focus on these places, they can prevent and reduce crime. The regularity of such findings led Weisburd (2015) to assert the existence of a “law of crime concentration.” Given that bold assertion, the authors test whether the law of crime concentration is generalizable to one of the most common public safety concerns that police handle—traffic crashes.

To determine whether the law of crime concentration applies to traffic crashes, the authors examined crash locations and times in all counties in Utah across four years. Following and expanding on Weisburd's methods, the authors calculate the bandwidth of concentration for these crashes and analyze various types by severity and possible explanations for variations in crash concentrations across the state.

A small proportion of street segments and intersections experience a disproportionately high number of crashes, and the degree of concentration of crashes may be even higher than that of crime. Further, there are variations in the levels of crash concentration across counties and in the severity of injuries resulting from the crashes.

Place-based criminologists and policing scholars have not often explored traffic crashes in their analyses. Yet, traffic problems take up a significant amount of law enforcement time and resources and are often priorities for most law enforcement agencies. Given what the authors know from traffic, policing and crime and place research, targeted approaches at micro traffic crash hot spots can be beneficial for public safety prevention.

This study is the first to explore the application of Weisburd's Law of Crime Concentration to traffic crashes. Given that police spend a significant amount of time and resources on traffic-related problems in their jurisdiction, finding more effective, evidence-based approaches to address this public safety concern should be a high priority for police and researchers alike.

In response to growing concerns over the negative consequences of Internet addiction on adolescents’ mental health, coupled with conflicting results in this literature stream, this meta-analysis sought to (1) examine the association between Internet addiction and depressive symptoms in adolescents, (2) examine the moderating role of Internet freedom across countries, and (3) examine the mediating role of excessive daytime sleepiness.

In total, 52 studies were analyzed using robust variance estimation and meta-analytic structural equation modeling.

There was a significant and moderate association between Internet addiction and depressive symptoms. Furthermore, Internet freedom did not explain heterogeneity in this literature stream before and after controlling for study quality and the percentage of female participants. In support of the displacement hypothesis, this study found that Internet addiction contributes to depressive symptoms through excessive daytime sleepiness (proportion mediated = 17.48%). As the evidence suggests, excessive daytime sleepiness displaces a host of activities beneficial for maintaining mental health. The results were subjected to a battery of robustness checks and the conclusions remain unchanged.

The results underscore the negative consequences of Internet addiction in adolescents. Addressing this issue would involve interventions that promote sleep hygiene and greater offline engagement with peers to alleviate depressive symptoms.

This study utilizes robust meta-analytic techniques to provide the most comprehensive examination of the association between Internet addiction and depressive symptoms in adolescents. The implications intersect with the shared interests of social scientists, health practitioners, and policy makers.

To advance marketing research and practice, this study aims to examine the application of the innovative, mobile-applicable neuroimaging method – mobile functional near-infrared spectroscopy (mfNIRS) – in the field of marketing research, providing comprehensive guidelines and practical recommendations.

A general review and investigation of when and how to use mfNIRS in business-to-consumer and business-to-business marketing settings is used to illustrate the utility of mfNIRS.

The research findings help prospective marketing and consumer neuroscience researchers to structure mfNIRS experiments, perform the analysis and interpret the obtained mfNIRS data.

The application of mfNIRS offers opportunities for marketing research that allow the exploration of neural processes and associated behaviour of customers in naturalistic settings.

The application of mfNIRS as a neuroimaging method enables the investigation of unconscious neural processes that control customer behaviour and can act as process variables for companies.

This is one of the first studies to provide comprehensive guidelines and applied practical recommendations concerning when and how to apply mfNIRS in marketing research.

This paper aims to investigate the impact of combining grain-oriented electrical steel (GOES) grades on specific iron losses and the flux density distribution within a single-phase magnetic core.

This paper presents the results of finite-element method (FEM) simulations investigating the impact of mixing two different GOES grades on losses of a single-phase magnetic core. The authors used different models: a 3D model with a highly detailed geometry including both saturation and anisotropy, as well as a simplified 2D model to save computation time. The behavior of the flux distribution in the mixed magnetic core is analyzed. Finally, the results from the numerical simulations are compared with experimental results.

The specific iron losses of a mixed magnetic core exhibit a nonlinear decrease with respect to the GOES grade with the lowest losses. Analyzing the magnetic core behavior using 2D and 3D FEM shows that the rolling direction of the GOES grades plays a critical role on the nonlinearity variation of the specific losses.

The novelty of this research lies in achieving an optimum trade-off between the manufacturing cost and the core efficiency by combining conventional and high-performance GOES grade in a single-phase magnetic core.

Restrictions on social interaction and travel due to the COVID-19 pandemic have affected how researchers approach fieldwork and data collection. Whilst online focus groups have received attention since the 2000s as a method for qualitative data collection, relatively little of the relevant literature appears to have made use of now ubiquitous video calling software and synchronous, interactive discussion tools. Our own experiences in organising fieldwork aimed at understanding the impact of different “future-proofing” strategies for the European agri-food system during this period resulted in several methodological changes being made at short notice. We present an approach to converting in-person focus group to a virtual methodology and provide a checklist for researchers planning their own online focus groups. Our findings suggest data are comparable to in-person focus groups and factors influencing data quality during online focus groups can be safeguarded. There are several key steps, both before and during the focus groups, which can be taken to ensure the smooth running of such events. We share our reflections on this approach and provide a resource for other researchers moving to online-only data collection.