Search results

The current analysis was conducted to investigate the quality of surfaces and geometry of tracks printed using PolyMideTM CoPA, PolymaxTM PC and PolyMideTM PA6-CF materials through fused deposition modelling (FDM). This study also examined the degree of fusion of adjacent filaments (tracks) to approximate the optimal process parameters of the three materials.

Images of fused adjacent filaments were acquired using scanning electron microscopy (SEM), after which, they were analysed using Image J Software and Minitab Software to determine the optimal process parameters.

The optimal process parameters for PolyMideTM CoPA are 0.25 mm, 40 mm/s, −0.10 mm, 255°C and 0.50 mm for layer thickness, printing speed, hatch spacing, extrusion temperature and extrusion width, respectively. It was also concluded that the optimal process parameters for PolymaxTM PC are 0.30 mm, 40 mm/s, 0.00 mm, 260°C and 0.6 mm for layer thickness, printing speed, hatch spacing, extrusion temperature and extrusion width, respectively.

It was difficult to separate tracks printed using PolyMideTM PA6-CF from the support structure, making it impossible to examine and determine their degree of fusion using SEM.

The study provides more knowledge on FDM, which is one of the leading additive manufacturing technology for polymers. The information provided in this study helps in continued uptake of the technique, which can help create job opportunities, especially among the youth and young engineers.

This study proposes a new and a more accurate method for optimising process parameters of FDM at meso-scale level.

Fused deposition modeling (FDM) nowadays offers promising future applications for fabricating not only thermoplastic-based polymers but also composite PLA/Metal alloy materials, this capability bridges the need for metallic components in complex manufacturing processes. The research is to explore the manufacturability of multi-metal parts by printing green bodies of PLA/multi-metal objects, carrying these objects to the debinding process and varying the sintering parameters.

Three different sample types of SS316L part, Inconel 718 part and bimetallic composite of SS316L/IN718 were effectively printed. After the debinding process, the printed parts (green bodies), were isothermally sintered in non-vacuum chamber to investigate the fusion behavior at four different temperatures in the range of 1270 °C−1530 °C for 12 h and slowly cooled in the furnace. All samples was assessed including geometrical assessment to measure the shrinkage, characterization (XRD) to identify the crystallinity of the compound and microstructural evolution (Optical microscopy and SEM) to explore the porosity and morphology on the surface. The hardness of each sample types was measured and compared. The sintering parameter was optimized according to the microstructural evaluation on the interface of SS316L/IN718 composite.

The investigation indicated that the de-binding of all the samples was effectively succeeded through less weight until 16% when the PLA of green bodies was successfully evaporated. The morphology result shows evidence of an effective sintering process to have the grain boundaries in all samples, while multi-metal parts clearly displayed the interface. Furthermore, the result of XRD shows the tendency of lower crystallinity in SS316L parts, whilst IN718 has a high crystallinity. The optimal sintering temperature for SS316L/IN718 parts is 1500 °C. The hardness test concludes that the higher sintering temperature gives a higher hardness result.

This study highlights the successful sintering of a bimetallic stainless steel 316 L/Inconel 718 composite, fabricated via dual-nozzle fused deposition modeling, in a non-vacuum environment at 1500 °C. The resulting material displayed maximum hardness values of 872 HV for SS316L and 755.5 HV for IN718, with both materials exhibiting excellent fusion without any cracks.

This research paper aims to provide a comprehensive analysis of the ergonomic risks faced by employees in the IT industry who work from home (WFH). With the increasing prevalence of remote work, understanding and addressing ergonomic challenges are crucial to ensure the well-being, productivity and long-term health of IT professionals.

The data are gathered through a survey questionnaire which includes demographic factors, job-related factors, quick video display terminal (VDT) workspace evaluation factors, quick chair design usability evaluation factors and the Cornell Musculoskeletal Discomfort Questionnaire (CMDQ) in order to measure the ergonomic risks among them. The risk factors associated with each body part are determined using ordinal logistic regression.

Highest occurrence of musculoskeletal disorders was observed in the neck, hip and lower back among WFH employees. By identifying and prioritizing these risks, organizations and individuals can implement effective strategies to promote a healthy and ergonomic work environment for remote IT employees.

This research contributes new insights that will be helpful for researchers and practitioners working in the areas of ergonomic risks, improving performance of work from home employees and provides suggestions for future research to explore and enrich the existing knowledge base.

While the entrepreneurship literature historically supported the idea that the center and finality of the research is the entrepreneur or the entrepreneurial firm, current developments highlight the importance of the context in which the entrepreneur or the entrepreneurial firm operates. This modern view challenges how the entrepreneurship field has been evolved and illustrates the transformation of the research that calls for an accurate overview of where the entrepreneurship field is going. This chapter aims at providing the historical evolution of the field of entrepreneurship by highlighting the state of the art, the main theories, the research gaps, the trends, the current research discussion, and where the field of entrepreneurship is going. Thanks to this historical view, scholars could learn of the origins of the field, how the research discussion has been evolved and how some popular trends appear or disappear and therefore find some research directions and a future research agenda for the future of entrepreneurship.

In a rapidly shifting market, organizations seek more diverse and innovative employee development interventions. Yet, these initiatives may have limited impact without employees’ engagement. This conceptual paper aims to propose self-leadership as a value-added strategy for promoting both individual and organizational development.

The authors conducted a conceptual analysis with three case examples. The cases were purposefully selected, aiming to comprehend how the concept of self-leadership has been applied within organizations and to identify real-life examples where self-leadership has been adopted as an organizational strategy.

This study demonstrates that self-leadership plays a significant role in facilitating human resource development (HRD) initiatives. Specifically, the authors illustrate how self-leadership interventions in companies empower individuals to take charge of their development, aligning personal and organizational goals. When effectively applied, self-leadership strategies positively impact HRD practices in the areas of training and development, organization development and career development, yielding benefits for both employees and employers.

This study addresses knowledge gaps in the emerging field of self-leadership in HRD by providing three companies’ examples of how self-leadership can add value to HRD. The findings offer unique insights into the synergy between self-leadership and HRD, benefiting academics interested in this line of inquiry and HRD practitioners seeking innovative approaches to employee and organizational development.

This paper aims to explore the core elements and essential characteristics of entrepreneurship pedagogy in American higher education institutions, outlining a model from multiple participants’ perspectives and offering a blueprint for teaching entrepreneurship in higher education settings.

Structured interviews were conducted with 26 participants involved in entrepreneurship education in American higher education institutions, including teaching managers, teachers and students. The interview data were transformed into documentary materials and analyzed through grounded theory.

The characteristics of the core elements of entrepreneurship education pedagogy in American higher education institutions include unified and distinctive teaching content, diverse and practical teaching methods, disciplinary and interdisciplinary curriculum system, professional and inclusive teaching team, procedural and systematic teaching evaluation. More profoundly, entrepreneurship pedagogy in American universities can be conceptualized as a flywheel model, propelled by the significant autonomy of teachers. Teacher autonomy empowers dynamic interactions among teaching content, teaching method, curriculum development and teaching evaluation, facilitating ongoing innovation in American entrepreneurship pedagogy like a rapidly forward-rolling wheel.

This study contributes to a better understanding of the pedagogy of American entrepreneurship education as a mature discipline, which may assist educators in teaching entrepreneurship at the college level. Moreover, a flywheel model of entrepreneurship pedagogy is offered, emphasizing teacher autonomy as a vital but often overlooked role in the development of entrepreneurship education.

Inflation and federal monetary efforts to control it with interest rate hikes have very real and overwhelmingly negative consequences on US local governments following the onset of COVID-19. This study explores the post-pandemic inflationary environment of US local governments; examines the impacts of inflation and high interest rates on local government revenue, operating costs, capital costs, and debt service; reviews local government inflation management strategies, including the use of intergovernmental revenue; and assesses ongoing threats to local government financial health and financial resilience.

This study uses trend and literature analysis to comment on current issues local governments face.

The study finds that the growth of property values and resulting stability of property tax revenue has been important to local government revenues; that local governments bear very real burdens as operating and capital costs increase; and that the combination of high inflation and interest rates affects local government debt issuance by negatively affecting credit quality and interest costs, leading to municipal market contraction. Local governments have benefitted tremendously from intergovernmental revenue, but would be ill-advised to rely on it.

Vulnerabilities owing from revenue mismatch with the economy; inadequate affordable housing, inequality, and social issues; a changing workforce and tight labor market; climate change; and federal fiscal contraction—all of which are exacerbated by high inflation and interest rates—require local governments to act strategically, boldly and collaboratively to achieve fiscal health and financial resilience, and to realize positive returns of investments in people and capital.

This work is unique in addressing the post-pandemic impact of inflation and interest rates on local governments.

This paper aims to examine the factors that contribute to the external debt growth in Ghana.

The study adopts the autoregressive distributed lag (ARDL) model and the error correction model (ECM) to establish the short-run and long-run relationships between the dependent variable (external debt) and the independent variables (debt service, exchange rate, gross domestic product, government expenditure, import and trade openness), using a time series data spanning from 1990 to 2019.

The results indicate that debt service, GDP, government expenditure and trade openness have a positive and significant relationship with external debt, while import and exchange rates have a negative relationship with external debt in the long run. In the short run, debt service, import, exchange rate and trade openness have a positive and significant relationship with external debt, while GDP has a negative relationship with external debt.

The study found that variables such as government expenditure, debt service and import contribute significantly to the nation’s external debt stock. These findings suggest that policymakers should focus on prioritising and cutting down expenditure in their quest to curtail the debt menace facing the nation. Since existing debt service has the tendency of influencing debt stock, it is recommended that government should reduce borrowing in order avoid debt trap. Home-grown policies to reduce imports must also be encouraged. As these drivers of external debt are tackled head-on, Ghana can be rightly positioned to record lower levels of public debt and subsequently reap the benefits of economic growth.

The study adds to the public debt literature, specifically addressing the idiosyncratic determinants of external debt within the Ghanaian context.

The purpose of this study is to emphasize the important role of performance-oriented human resource (HR) practices and gender equality perceptions in supervisors and chief executive officers (CEOs) for career development among women in management.

This study used a quantitative methodology to examine relationships among variables. The authors conducted a survey to investigate factors influencing the career development of women managers in professional settings, with a sample of 1,502 female managers in South Korea.

The relationship between performance-oriented HR practices and career development for women managers was supported. In addition, self-leadership significantly mediated the relationship between performance-oriented HR practices and career development. Finally, double moderator effects of gender equality perceptions of CEOs and supervisors on the relationship between performance-oriented HR practices and self-leadership were significant.

This study emphasizes that career development for women in South Korea depends on gender equality awareness and institutional reorganization for best practices at top management levels. Specifically, this study identified the essential role of performance-based HR practices to support self-leadership and career development in women managers. Furthermore, this study recognized gender equality perceptions of CEOs and supervisors as a critical factor in the successful career development of women managers.

Research has examined how new ventures strengthen local economic outcomes; however, limited research examines health-oriented ventures and their impact on social outcomes, including health outcomes. Increased VC investment in healthcare service start-ups signals more activity toward this end, and the need for further academic inquiry. We examine the relationship between these start-ups and county-level health outcomes, health factors, and hospital utilization.

Data on start-ups funded via institutional venture capital from PitchBook were merged with US county-level outcomes from the County Health Rankings and Area Health Resources Files for 2010 to 2019. We investigated how the number of VC-funded healthcare service start-ups, as well as a subset defined as innovative, were associated with county-level health measures. We used panel models with two-way fixed effects and Propensity Score Matched (PSM), controlling for demographics and socioeconomic factors.

Each additional VC-funded healthcare service start-up was related to a significant 0.01 percentage point decrease in diabetes prevalence (p < 0.01), a decrease of 1.54 HIV cases per 100,000 population (p < 0.1), a 0.02 percentage point decrease in obesity rates (p < 0.01), and a 0.03 percentage point decrease in binge drinking (p < 0.01). VC-funded healthcare service start-ups were not related to hospital utilization.

This work expands our understanding of how industry-specific start-ups, in this case healthcare start-ups, relate to positive social outcomes. The results underscore the importance of evidence-based evaluation, the need for expanded outcome measures for VC investment, and the possibilities for integration of healthcare services and entrepreneurship ecosystems.