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The purpose of this study is to investigate the entropy generation in different nanofluids flow over a vertically moving rotating disk. Unlike the classical Karman flow, water-based nanofluids have various suspended nanoparticles, namely, Cu, Ag, Al₂O₃ and TiO₂, and the disk is also moving vertically with time-dependent velocity.

The Keller box technique numerically solves the governing equations after reduction by suitable similarity transformations. The shear stress and heat transport features, along with flow and temperature fields, are numerically computed for different concentrations of the nanoparticles.

This study is done comparatively in between different nanofluids and for the cases of vertical movement of the disk. It is found that heat transfer characteristics rely not only on considered nanofluid but also on disk movement. Moreover, the upward movement of the disk diminishes the heat-transfer characteristics of the fluid for considered nanoparticles. In addition, for the same group of nanoparticles, an entropy generation study is also performed, and an increasing trend is found for all nanoparticles, with alumina nanoparticles dominating the others.

This research is a novel work on a vertically moving rotating surface for the water-conveying nanoparticle fluid flow with entropy generation analysis. The results were found to be in good agreement in the case of pure fluid.

This study attempts to identify and explicate the unique segmentation of the increasingly growing virtual reality (VR) user market based on the user experience. Consequently, it collects five hundred forty-five online survey questionnaires through the Prolific platform and deploys cluster analysis to identify mutually exclusive groups of VR users. The research variable, user experience, contains 16 indicators explained by four dimensions. As a result, this study is able to unveil three mutually exclusive markets which are labeled as (1) beginner, (2) aficionado, and (3) utilitarian. The unique features of these three groups are further compared based on their VR tour behaviors. In the conclusion section, it offers managerial implications for devising novel marketing strategies.

Exhibiting an unprecedented rate of advancement, technology’s progression over the past two decades has regrettably led to a disturbing increase in the distribution of child sexual abuse materials (CSAM) online. Compounded by the emergence of an underground cryptocurrency market, which serves as a primary distribution channel for these materials, the investigation and sanctioning of CSAM present a complex and unique set of challenges. The purpose of this study is to accurately diagnose the CSAM sentencing landscape and build a more comprehensive, evidence-based legal framework in penology.

The study collected and analyzed case details regarding CSAM sanctions in a database sourced from the US Department of Justice for 2020. Various factors were analyzed such as the victim’s age, offender typology and previous conviction, accompanied by an analysis of how these factors affect the sentence length.

The study found that the hierarchical agency-level interactions give insight into resource allocation prioritization, as well as confirming a close relationship between prior conviction history and sentence length, with the victim’s age inversely related to sentence length. Leveraging data-driven insights, the study paves the way for more targeted and effective sanctions, ultimately contributing to the broader goal of safeguarding children from online sexual exploitation.

The paper provides a critical analysis of the complex landscape surrounding CSAM distribution and judicial sentencing. By examining case details and leveraging data-driven insights, it offers valuable contributions to understanding the interplay between various factors such as victim age, offender typology and prior convictions on sentencing outcomes. This comprehensive approach not only sheds light on the dynamics of CSAM sanctions but also lays the groundwork for evidence-based legal frameworks in penology. Its originality lies in its nuanced examination of hierarchical agency interactions and its potential to inform more targeted interventions for safeguarding children from online exploitation.

During the coronavirus disease 2019 (COVID-19) pandemic, ubiquitous social media has become a primary channel for information dissemination, social interactions and recreational activities. However, it remains unclear how social media usage influences nonpharmaceutical preventive behavior of individuals in response to the pandemic. This paper aims to explore the impacts of social media on COVID-19 preventive behaviors based on the theoretical lens of empowerment.

In this paper, survey data has been collected from 739 social media users in China to conduct structural equation modeling (SEM) analysis.

The results indicate that social media empowers individuals in terms of knowledge seeking, knowledge sharing, socializing and entertainment to promote preventive behaviors at the individual level by increasing each person's perception of collective efficacy and social cohesion. Meanwhile, social cohesion negatively impacts the relationship between collective efficacy and individual preventive behavior.

This study provides insights regarding the role of social media in crisis response and examines the role of collective beliefs in the influencing mechanism of social media. The results presented herein can be used to guide government agencies seeking to control the COVID-19 pandemic.

Education-based discrimination has not received sufficient attention within the field of human resource development (HRD), which can provide practical interventions to help solve the hardships of high school graduate employees (HSGEs). This paper aims to bring this issue to the forefront by framing the current marginalization of South Korean HSGEs as an individual-level issue that has repercussions to early career development, and also as an organizational-level issue that has implications on workplace learning and development.

This paper used an integrative literature review method by analyzing studies that have focused on the challenges faced by HSGEs. The objective was to identify patterns of their experiences and call attention to strategies they utilize to cope with the marginality they face in the workforce. The Korea Citation Index (KCI), a database that manages Korean domestic journals, was used. In total, 187 articles were found, and 15 articles succinctly matched the research criteria.

HSGEs struggled with employment unreadiness and faced discrimination based on their academic background, young age and low-rank position within organizations. In turn, they were vulnerable to poor working conditions (e.g., high work intensity, long working hours, etc.). These challenges led HSGEs to pursue a college degree and/or engage in workplace learning.

The use of critical human resource development (CHRD) has typically been limited within a South Korean context. We deliberately applied a critical perspective to raise awareness about how contemporary forms of marginality have gone unchecked, specifically by interrogating the exclusion and disempowerment experienced by HSGEs.

This study aims to investigate the dynamics of cyberbullying among minority youths, focusing on its increasing prevalence in the digital realm, which does not necessitate technical expertise from the offenders. It explores a shift from conventional bully characteristics to individuals assuming new digital personas, merging traditional criminology with flag theory to analyze violent behavior online, specifically in educational environments, and studying the correlation between low self-control, affiliations with delinquent peers and the likelihood of cyberbullying occurrences.

The research uses structural equation modeling to examine survey data from 237 eleventh-grade students in St. Louis public schools, focusing on the relationships between cyberbullying, low self-control and association with delinquent peers within a comprehensive theoretical framework that includes the flag theory and demographic factors, as well as using multigroup analysis to investigate racial dynamics and confirming indirect effects using bootstrapping techniques.

The research establishes strong connections between low self-control, delinquent peer involvement, and cyberbullying, supporting the flag theory in digital violence contexts, while also showing that low self-control and peer engagement play a mediating role in cyberbullying incidents among minority youth, with racial composition having no significant impact on these dynamics.

The study is restricted by its focus on a particular geographical area, in conjunction with its reliance on self-reported information obtained exclusively from a specific age group. This specificity raises concerns about the applicability of the findings to diverse populations. Furthermore, the study’s dependence on a three-item assessment for cyberbullying, combined with the challenges encountered in achieving complete scalar invariance during multigroup analysis, emphasizes the need for more precise measurement tools and improved methodological frameworks.

This research discloses actionable insights fundamental to the advancement of cyberbullying prevention strategies. The finding that the connection between race and the effects of peer association and self-control on cyberbullying is minimal suggests that these interventions can be generally applied, transcending racial boundaries. Moreover, identifying self-control as a critical intermediary offers fresh avenues for cybercrime research, shifting the conventional focus from established predictors. By zeroing in on peer influence as a fundamental element, this study provides innovative angles to bolster the understanding of digital violence mitigation in educational settings.

This research emphasizes the urgent concern of cyberbullying among minority youths, along with its psychological and academic impacts. By elucidating the interaction between personal traits and social networks, the findings can guide comprehensive strategies aimed at cultivating safer digital spaces and bolstering social wellness within educational frameworks.

This research presents an original and ground-breaking method that combines various theories in criminology specifically in the context of cyberbullying among minority youths. By proposing a new and redefined role for self-control, which is not seen as the common main predictor but rather as a crucial mediator, this study provides fresh insights into the dynamics of cyber aggression. Through the detailed examination of the flag theory framework, the study uncovers the complex reciprocal relationship between self-control and peer engagement, revealing previously overlooked mechanisms in a broader landscape of digital violence.

Spirituality has long played an important role in conflict and crisis management at both individual and organizational levels, and the interest in spirituality is increasing day by day. Spirituality gives meaning or purpose to one's life and minimizes the potential for conflict, so spirituality has a mitigating role in conflict and crisis processes. In addition, spirituality is thought to foster values such as equality, honesty, compassion, avoidance of harm, respect, peace, justice, forgiveness, sense of duty, reliability, good citizenship, gratitude, optimism, gratitude, love, dedication, and empathy. Therefore, it can be said that employees who have internalized such moral values will definitely reflect them in their actions and discourses in conflict and crisis situations and will achieve successful results. In fact, spirituality drives the behaviors of employees in both crisis management and coping with crisis management. In this context, it can be said that employees with a high level of spirituality can choose the integrative conflict style in conflict situations and can manage conflict positively and thus prevent a crisis from occurring. It is also foreseen that religious spirituality will play a positive role in conflicts and create a peaceful environment in organizations.

The application of correct contractor selection strategies leads to the selection of a qualified contractor and, as a result, the on-time delivery of the project with the desired quality and within the predetermined budgetary constraints. For this reason, evaluating and qualifying contractors before reviewing the proposed prices has been considered an important issue. One factor that disrupts the project completion process and the failure to achieve pre-planned goals effectively is the occurrence of contractors' disputes and claims in projects. To this end, the present study explores claim-reduction strategies for selecting effective contractors in an uncertain environment to reduce possible problems.

The two-step grey data envelopment analysis (GDEA) approach was used to measure efficiency as a powerful tool in selecting efficient contractors during tenders. This approach can extend the applications of multi-criteria decision-making (MCDM) models. In other words, given some uncertainties, the unavailability of some data, and the problems with the DEA model, the two-step GDEA model was used to rank the contractors. The data confirmed the satisfactory outcomes from the selected model.

The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors lacking required qualifications, and selecting efficient contractors. At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation. Consequently, this approach reduces claims to a minimum level and increases the organization's effective material and non-material profit.

Oil and gas plans and projects have a significant, sensitive, and decisive role in the economic, social, political, cultural, infrastructural, and all-round development of Iran; This is while most of the financial resources needed to implement the development and programs across the country come from oil revenues. Studies have indicated that despite the importance of these plans and projects, many of them are not completed successfully, and this causes irreparable losses to the country's economy and development in various fields.

1. The findings of this study can be used by organizations to select more effective contractors to assign projects and plans to them.

2. The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors who lack required qualifications, and finally selecting efficient contractors.

3. At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation.

4. This approach also gives credit to the employer during the execution period and contributes to assessing unqualified contractors and reducing the temptation to hand over the project to an unqualified contractor but with a lower bid price.

5. Consequently, this approach reduces claims to a minimum level and increases the effective material and non-material profit of the organization.

6. Moreover, it provides an extra-organizational evaluation for contractors, motivating them to upgrade their capabilities and optimally allocate material and non-material resources, especially human resources.

The findings of this study can be used by organizations to select more effective contractors to assign projects and plans to them.

The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors who lack required qualifications, and finally selecting efficient contractors.

At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation.

This approach also gives credit to the employer during the execution period and contributes to assessing unqualified contractors and reducing the temptation to hand over the project to an unqualified contractor but with a lower bid price.

Consequently, this approach reduces claims to a minimum level and increases the effective material and non-material profit of the organization.

Moreover, it provides an extra-organizational evaluation for contractors, motivating them to upgrade their capabilities and optimally allocate material and non-material resources, especially human resources.

The paper redefines workplace spirituality (WS/WPS) by transcending the existential vacuum (in psychiatric terms a sense of lack of meaning of human existence and thus of work), leading to the development of workplace creativity, productivity and satisfaction, targeting operational profitability and organizational optimization.

Spirituality is analyzed philosophically, following the Nietzschean definition in response to Schopenhauer’s primordial suffering. Philosophical syncretism yields a viable organizational culture change model of spiritualizing the workplace. For this purpose, specific techniques are proposed which are combined with those already applied to various large companies and organizations.

Spirituality in the workplace acts as a catalyst for developing beneficial qualities by increasing employee job satisfaction, organizational efficiency and business profitability, when equally responding to stakeholders’ needs.

The suggested change model holistically fosters organizational, operational, individual and collective effectiveness through work place spirituality redefined.

For the first time spirituality in the workplace is discussed under a brand new perspective, resulting in an interdisciplinary emerging model, contributing to the field by providing guidance to academics and practitioners to its auspicious implementation through organizational culture change.