Search results

From on-board automotive diagnostics to real-time aircraft state of health, the implementation of health monitoring and management systems are an increasing trend. Further, reductions in operating budgets are forcing many companies and militaries to consider new operating and support environments. Combined with longer service lives for aircraft and other systems, maintenance and operations processes must be reconsidered. The majority of research efforts focus on health monitoring techniques and technologies, leaving others to determine the maintenance and logistics impact on the systems. The paper aims to discuss these issues.

This research analyzes the impact of a health monitoring system on a squadron of aircraft. Flight, maintenance and logistics operations are stochastically modeled to determine the impact of program decisions on supply metrics. An arena discrete event simulation is utilized to conduct this research on 20 components on each of the 12 aircraft modeled. Costs and availability are recorded for comparison across three sparing scenarios to include economic order quantity (EOQ) for baseline and health monitoring cases and a just-in-time (JIT) health monitoring set of simulations.

Data are presented for EOQ and JIT supply methods. A comparison of health monitoring enabled supply to current methods shows cost savings and availability gains. The different methodologies are compared and discussed as a trade-space for programmatic decisions.

This work demonstrates the ability of health monitoring systems and condition based maintenance to affect supply ordering decisions. The development of trade-spaces within operating environments is demonstrated along with the ability to conduct cost benefit analyses.

For decades, the Department of Defense (DoD) has employed numerous reporting and monitoring tools for characterizing the acquisition cost estimates of its programs. These tools have led to dozens of studies thoroughly documenting the magnitude and extent of DoD acquisition cost growth. However, little attention has been paid to the behavior of the other main cost component of a system's life cycle cost: Operating and Support (O&S) costs. Consequently, the DoD has little knowledge regarding the accuracy of O&S cost estimates or how that accuracy changes over time. In a previous paper, the authors described an analytical methodology for remedying this deficiency via a study to characterize the historical accuracy of O&S cost estimates. The results are presented here, and indicate there tend to be large errors in DoD O&S cost estimates, and that the accuracy of the estimates improves little over time

This chapter explores the parental experiences of 21 mothers of young and/or adult children who have been diagnosed with developmental disabilities (DD). Specific attention is paid to mothers’ reflections on marginalization, stress, and resiliency. Intersectionality of marginalization was explored with a select number of participants who identified with minority racial groups, with the LGBTQ community, and/or as a single or young mother. Data were collected via semi-structured interviews and analyzed using the constant comparative method. Eighteen mothers reported experiencing elevated levels of stress specifically related to challenges associated with DD; the need for greater investments of time and money was emphasized. However, nearly every participant highlighted stories of resilience and acclimation to these challenges associated with raising a child with DD. Thirteen mothers overtly discussed experiences of discrimination and marginalization. Some of these scenarios included being stared at or criticized in public, being excluded from social events, and facing discrimination within school settings. Select participants from marginalized backgrounds (being as a young parent, or as Black, single, lesbian, bisexual, and/or transgender) provided insight into how layers of marginalization negatively impacted their parental experiences. These personal accounts provide additional evidence that mothers of children with DD experience courtesy stigma. In addition, they provide a holistic illustration of motherhood experiences that does not center on only negative or positive aspects. Finally, the reports of mothers who identified with multiple marginalized identities strengthen the call for additional empirical focus on intersectionality as it concerns mothers of children with DD.

Education, and especially the life of a teacher, is constantly evolving. Teachers' roles and responsibilities have become more complicated and multifaceted over time. Therefore, they have to invest a great deal of time, energy, and effort to navigate the demands and complexities of their role. In the last 20 years, education has changed in response to increased workload, the rise of high-stakes testing and accountability, social-emotional and behavioral challenges among students, school safety concerns, equity concerns, and now the coronavirus pandemic. These factors have been linked to high stress and teacher burnout, which leads to more teachers leaving their jobs (Arvidsson et al., 2019). Nonetheless, those who endure the flames of burnout do so because they are resilient in the face of adversity and persistent in their commitment to the call of teaching and learning. This chapter examines the effects of stress and burnout among three alternatively certified teachers and the behaviors and strategies these educational first responders employ to build resilience and persistence in their service to the students who shape our future.

Social bookmarking is an online tool that can enable students to develop their skills in finding, sharing and (re)organising online information. Research has demonstrated that it has the potential to impact positively on students’ digital literacies – their ability to use the Internet critically to support their learning – and particularly on the kinds of online research skills that are vital to supporting inquiry-based approaches to learning and teaching in history. This chapter provides a detailed overview of how online social bookmarking tools have been used to support the development of students’ digital literacies in history in a number of UK higher education institutions. The general approach which has been adopted is based on constructivist principles and requires students to develop their skills and appreciation of the Internet as a venue for scholarly research in order to strengthen their inquiry skills in preparation for more independent work at higher levels of study. The chapter presents evaluative data that has been collected from students who have used social bookmarking to support inquiry activities within modules and as part of their independent learning activities. We also report staff reflections on the usefulness of social bookmarking to support student learning in history and make some recommendations for the practical application of such tools elsewhere. These include the potential significant impact of social bookmarking on students’ ability to interact productively and creatively with online resources in the course of their learning; the usefulness of the tool in supporting collaborative working and sharing materials; the need to ensure that students receive adequate training in using social bookmarking and that their work receives adequate credit (which will, in turn, increase motivation).

This chapter uses narrative inquiry to tell the stories of two female neophyte educators experiencing the oppositional misalignment between their idealized perception of female teachers in American society and their personal realities by providing alternate images of women in education. American teachers, especially women, are perceived as a homogeneous group that lives to serve the children of others and inhabit a monochrome, two-dimensional, existence inside the educational landscape of schools (Clandinin & Connelly, 1996). However, the prevailing notions and outdated imagery of teachers is flawed in its lack of acknowledgment of the richly diverse and textured lived experiences of women both inside and outside of the educational field. Furthermore, female teachers face tremendous pressure to imitate these unrealistic ideals and expectations at the expense of the authentic self, which can lead to a myriad of internal dissonances, such as burnout, serving as an umbrella over PTSD, anxiety, compassion fatigue, decreased confidence, and lower job satisfaction. The researchers in this chapter come from nontraditional backgrounds to capture the negative effects of subtle, persistent, and unrealistic expectations of females that contribute to feelings of burnout at the onset of our teaching careers.

This volume explores the intersection of youth agency, media representation, and conflict, urging a reevaluation of the roles of youth in contemporary socio-political contexts. Media serves as a tool for and a site of resistance. Chapters in this volume highlight ways in which children and youth leverage digital platforms to reshape narratives around conflict and peace. The compilation draws from a wide range of contexts, from the Balkan Wars to the current conflicts in Syria and Ukraine, offering in-depth analyses of the transformative potential of the (re)imagining of youth experiences, thus shifting from passive subjects to active narrators. This reorientation emphasizes the role of new technologies, including digital media and artificial intelligence, in supporting these endeavors, especially in enhancing mental health and psychological resilience among children affected by conflict.

Young children are particularly vulnerable in times of war and conflict, but they often emerge as resilient agents of change, promoting social justice and community rebuilding post-conflict. The likelihood of this type of trauma response, however, is largely dependent upon the tactical interventions offered to them during the trauma experience. News media portrayals of war and conflict can serve to heighten negative effects for children living in conflict zones, but entertainment and curriculum-based media can be used strategically to mitigate or moderate those effects.