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This paper aims to investigate the flow of two-layered non-Newtonian fluids with different viscosities in an axisymmetric elastic tube.

A mathematical model was considered for this study to describe the flow characteristics of two-layered non- Newtonian Jeffrey fluids in an elastic tube. Because Jeffrey fluid model is a better model for the description of physiological fluid motion. Further, this model is a significant generalization of Newtonian fluid model. Analytical expressions for flux, stream functions, velocities and interface velocity have been derived in terms of elastic parameters, inlet, outlet and external pressures. The effects of various pertinent parameters on the flow behavior have been studied.

The volumetric flow rate was calculated by different models of Mazumdar (1992) and Rubinow and Keller (1972); from this it was found that the flux of Jeffrey fluid is more in the case of Rubinow and Keller model than Mazumdar. A comparative study is made between single-fluid and two-fluid models of Jeffrey fluid flows and it was observed that more flux and higher velocities were observed in the case of two-fluid model rather than single-fluid model. Furthermore, when both the Jeffrey parameter tends to zero and ratios of viscosities and radii are unity, the results in this study agree with those of Rubinow and Keller (1972).

To describe the fluid flow in an elastic tube with two-layered systems, the models and solutions developed here are very important. These results will be highly suitable in analyzing the rheological characteristics of blood flow in a small blood vessel because of their elastic nature.

The purpose of this paper is to consider three factors, namely, intra-week demand fluctuations, interrelationship between the number of robots and order scheduling and conflicting objectives (i.e. cost minimization and customer satisfaction maximization), to optimize the robot logistics system.

The number of robots and the sequence of delivery orders are first optimized using the heuristic algorithm NSGACoDEM, which is designed using genetic algorithm and composite difference evolution. The superiority of this method is then confirmed by a case study of a four-star grade hotel in South Korea and several comparative experiments.

Two performance metrics reveal the superior performance of the proposed approach compared to other baseline approaches. Results of comparative experiments found that the consideration of three influencing factors in the operation design of a robot logistic system can effectively balance cost and customer satisfaction over the course of a week in hotel operation and optimize robot scheduling flexibility.

The results of this study reveal that numerous factors (e.g. intra-week demand fluctuations) can optimize the performance efficiency of robots. The proposed algorithm can be used by hotels to overcome the influence of intra-week demand fluctuations on robot scheduling flexibility effectively and thereby enhance work efficiency.

The design of a novel algorithm in this study entails enhancing the current robot logistics system. This algorithm can successfully manage cost and customer satisfaction during off-seasons and peak seasons in the hotel industry while offering diversified schemes to various types of hotels.

This chapter provides an overview on the traditions and values of teaching students with traumatic brain injury (TBI). First, we discuss the prevalence, identification, and characteristics associated with TBI and how those characteristics affect learning, behavior, and daily life functioning. Next, we focus on instructional and behavioral interventions used in maintaining the traditions in classrooms for working with students with TBI. Findings from a review of the literature conclude that there are no specific academic curriculums designed specifically for teaching students with TBI; however, direct instruction and strategy instruction have been shown to be effective educational interventions. Current research on students with TBI is predominately being conducted in medical centers and clinics focusing on area of impairments (e.g., memory, attention, processing speed) rather than academic achievement and classroom interventions. Finally, we conclude with a list of accommodations and a discussion of recommendations for future work in teaching students with TBI.

Focusing on the social influence processes in the context of massively multiplayer online role-playing games (MMORPGs), this study aims to investigate the nomological network of social influence factors, a topic seldom explicitly articulated in the literature in this unique context.

This study adopts a mixed-methods approach to develop and test a context-specific model of social influence processes in MMORPGs. First, the authors conducted qualitative interviews with MMORPG players to identify the drivers shaping players' perceptions of social influences. Second, the authors formulated and tested a research model with quantitative data collected from 450 respondents of an online survey.

Through the qualitative study, the authors identify leader enthusiasm, social support and social presence as the critical drivers of social influence factors. The result of the quantitative study validates the influences of the critical drivers and demonstrates the impact of social influences on MMORPG players' we-intention to continue playing games.

This research extends the social influence theory by identifying contextualized drivers that shape MMORPG players' perception of social influences determining their we-intention to continue playing games. MMORPG service providers can draw on these drivers to leverage social influences to increase players' we-intention of continuance.

This study aims to investigate how a sample of US municipalities use social media for strategic communication, focusing on efforts to effectively measure and evaluate that communication. Research questions focus on measurement and evaluation practices, as well as the motivations and impacts associated with these practices.

This research uses a qualitative approach. Interviews were conducted with 12 municipal government personnel responsible for social media communication. The self-selected participants represent 10 states and all US Census regions. Data was content analyzed and categorized according to four research questions, with emergent themes described.

The results show a diverse set of approaches and motivations, with surface-level measurement and evaluation methods. Initial efforts at more ad hoc use of social media are moving toward more deliberate strategies, but limited resources inhibit progress for some municipalities.

Few studies exist which explore how US municipalities formally measure and evaluate their social media activities as part of their overall strategic communication efforts. This study adds to the existing literature by providing insight into the measurement and evaluation practices that municipalities use to assess their social media communication. The study also provides a basis for larger and deeper investigations of municipal strategic communication practices related to measurement and evaluation.

This study aims to investigate basic/core principles and practical tools behind successful manuscript writing for education journals. Drawing on the insights of journal editors and related literature, this paper seeks to clarify the craft of preparing quality manuscripts to meet the expectations of academic journals.

This paper uses an interpretivist framework by incorporating a qualitative analysis of the literature with the authors’ experiences to identify key principles and issues in academic publishing. These narratives provide an empirical basis for understanding the mechanics and essence of effective manuscript crafting. The study integrates theoretical knowledge with actionable strategies, focusing on identifying the objectives and processes of writing, determining common challenges and directing readers toward comprehensive resources for guidance in article writing.

This study reveals that manuscript rejections often transcend technical shortcomings. Issues that are central to nonacceptance include misalignment with a journal’s thematic focus, absence of a coherent and persuasive argument, methodological weaknesses and insufficient evidence underpinning the assertions. Successful publication depends not just on data presentation and adherence to submission norms but also on developing a narrative that enriches the prevailing scholarly discourse. Our findings advocate for manuscripts that strike an appropriate balance between lucidity and analytical rigor, avoid superfluous technical language and express a mix of assertiveness and scholarly modesty.

Although there is literature on academic writing, very few recent articles have been uncovered that probe the intricacies of crafting education manuscripts and point to resources.

The primary objective of this research is to provide evidence that there are two distinct layers of investor sentiments that can affect asset valuation models. The first is general market-wide sentiments, while the second is biased approaches toward specific assets.

To achieve the goal, the authors conducted a multi-step analysis of stock returns and constructed complex sentiment indices that reflect the optimism or pessimism of stock market participants. The authors used panel regression with fixed effects and a sample of the US stock market to improve the explanatory power of the three-factor models.

The analysis showed that both market-level and stock-level sentiments have significant contributions, although they are not equal. The impact of stock-level sentiments is more profound than market-level sentiments, suggesting that neglecting the stock-level sentiment proxies in asset valuation models may lead to severe deficiencies.

In contrast to previous studies, the authors propose that investor sentiments should be measured using a multi-level factor approach rather than a single-factor approach. The authors identified two distinct levels of investor sentiment: general market-wide sentiments and individual stock-specific sentiments.

This paper aims to examine whether the audit committee moderates the relationship between audit quality and market reactions.

Using fixed effects and the GMM model for robustness, the study used 472 publicly listed firms on South Africa’s Johannesburg stock exchange spanning a period of six years from 2014 to 2019.

Results obtained show that audit quality impacts market reactions through share price and adjusted market returns. And, that the audit committee moderates the relationship between audit quality and market reactions in South Africa’s publicly listed firms. An effective audit committee is expected to play a crucial role in overseeing the audit process, ensuring the independence of auditors and promoting transparency and accountability which in turn impacts asset prices.

The study implies that governments and regulatory bodies in other developing economies could strengthen regulations about companies’ Acts, how firms regulate themselves and more so audit committees. Firms can also strive to make sure that audit committees are staffed with experts to promote higher audit quality and investor attention to get access to the much-alluded capital.

To the best of the authors’ knowledge, the study adds value by being the first to explore the subject matter of the importance of audit committees in defining audit quality and market reactions in publicly listed firms. The research adds to the body of knowledge on corporate governance and audit quality. It provides a case study specific to the South African context, contributing to the global literature on these topics.

Internationally publicized cases of police violence against unarmed black men have led to calls for accountability in policing. Increased footage of police–public interactions, specifically through the form of police body-worn cameras (BWCs), is encouraged and considered an innovation that can improve the policing profession. However, BWC adoption is likely more feasible in big city departments than in small and rural departments, who respond to many of the same issues as their larger counterparts. The purpose of this study is to explore perceptions of BWC among leaders of small and rural police departments.

Using a mixed methods approach, the authors surveyed 349 chiefs of small and rural Pennsylvania police departments and conducted qualitative follow-up interviews with 53 chiefs.

The results indicate that both adopters and non-adopters esteem BWC in a positive light, particularly toward the ability to improve professionalism and police–community relations. Other findings and implications of these results will be discussed.

This study focuses on small and rural police departments, which make up the majority of police departments but are often understudied.