Activity Theory as Theoretical Framework for Analyzing and Designing Global K-12 Collaborations in Engineering: A Case Study of a Thai-U.S. Elementary Engineering Project

The American engineering pipeline requires future workers to possess a unique skill set, comprised of content knowledge and 21st century skills, to recruit highly skilled, globally competitive engineers. Generally, 21st century skills are defined as the ability to think critically, communicate, collaborate in teams, and creatively solve problems. These skills are pertinent in training future engineers provided engineering utilizes the application of scientific knowledge within an inherently collaborative modality (the engineering design process). One component of developing 21st century skills and engineering competencies is the need for students to broaden their global awareness. Hence, American K-12 teachers are actively seeking opportunities for their students to collaborate with their international peers in an engineering context. One emergent pedagogical strategy is engaging in global K-12 collaborations in engineering in which K-12 students collaborate with international counterparts (another K-12 classroom/s or engineering expert/s), using the engineering design process, to create collaborative engineering solutions (projects). Because of the social complexity of global K-12 collaborations in engineering, the efficacy of these endeavors varies. This paper proposes Activity theory (AT) as a theoretical framework to analyze global K-12 collaborations in engineering. The authors use AT, in the context of an elementary-level U.S./Thai global collaboration, to document the experience and describe the activity. Using student, teacher, and expert created documents from the collaboration, the efficacy of the activity (student learning outcomes) were evaluated and then applied to AT. The rules, division of labor and community were found as areas that presented challenges to achieving successful outcomes within the activity system. This paper provides classroom teachers a roadmap for designing more successful global collaborations for K-12 engineering and 21st century skill development

The impact of plasticizer and degree of hydrolysis on free volume of poly (vinyl alcohol) films

The effect of plasticizer species and the degree of hydrolysis (DH) on the free volume properties of poly(vinyl alcohol) (PVA) were studied using positron annihilation lifetime spectroscopy. Both glycerol and propylene glycol caused an increase in the free volume cavity radius, although exhibited distinct plasticization behavior, with glycerol capable of occupying existing free volume cavities in the PVA to some extent. The influence of water, normally present in PVA film under atmospheric conditions, was also isolated. Water added significantly to the measured free volume cavity radius in both plasticized and pure PVA matrices. Differences in plasticization behavior can be attributed to the functionality of each plasticizing additive and its hydrogen bonding capability. The increase in cavity radii upon plasticizer loading shows a qualitative link between the free volume of voids and the corresponding reduction in Tg and crystallinity. Cavity radius decreases with increasing DH, due to PVA network tightening in the absence of acetate groups. This corresponds well with the higher Tg observed in the resin with the higher DH. DH was also shown to impact the plasticization of PVA with glycerol, indicating that the larger cavities—created by the weaker hydrogen bonding acetate groups—are capable of accommodating glycerol molecules with negligible effect on the cavity dimensions

How do Changes in Family Role Status Impact Employees? An empirical investigation

Purpose – Despite the proliferation of work–family research, a thorough understanding of family role status changes (e.g. the gaining of elder or child caregiving responsibilities) remain under-theorized and under-examined. The purpose of this paper is to conceptualize various forms of family role status changes and examine the ways in which these changes influence various employee outcomes. Design/methodology/approach – Data were collected as part of the work–family health study. Using a longitudinal, three-wave study with two-time lags of 6 months (n = 151 family role status changes; n = 392 individuals with family role stability), this study uses one-way analysis of variance to compare mean differences across groups and multilevel modeling to examine the predictive effects of family role status changes. Findings Overall, experiences of employees undergoing a family role status change did not differ significantly from employees whose family role status remained stable over the same 12-month period. Separation/divorce predicted higher levels of family-to-work conflict. Originality/value The work raises important considerations for organizational science and human resource policy research to better understand the substantive effects of family role status changes on employee well-being

Towards a best practice for the use of active non-contact surface scanning to record human skeletal remains from archaeological contexts

Active surface scanners emit light or a laser stripe to record the exterior surface of an object or landscape, providing results in three dimensions. The use of active surface scanners to record anthropological and archaeological contexts has increased within the last few years, creating a number of sub-contexts within these disciplines, and allowing a further development of certain applications, such as quantitative analysis, the use of replicas in education and museums, and the creation of digital databases archived in institutions. However with guidance, this paper aims to assess the advantages and disadvantages of active surface scanning and the potential for research with regards to the recording and analysis of human skeletal remains. The key advantages and uses identified include: quantitative digitisation, geometric morphometric studies, conservation, preservation, documentation, and reconstruction. However, surface scanning also has some limitations, including: cost, technological expertise, the need for a power source, computing requirements, and data size. Overall, the application of active surface scanning technology to archaeological skeletal remains will provide a vital digital archive that will serve to preserve the integrity of this fragile and finite resource for future generations. This is particularly important within the current developer-funded environment in which many skeletal collections, including those yielding unique or unusual pathological or morphological features, are re-buried, with only very limited time for analysis

Concept Mapping As A Tool To Promote Cognitive Integration

For 20 years there has been a push to integrate the basic and clinical sciences in medical school curricula. Recently, studies have suggested that cognitive integration by the student is best achieved when the relationships between basic science and clinical domains are explicitly demonstrated. Concept mapping in response to a prompt, which asks students to create relationships among clinical and basic science concepts, should provide explicit connections that lead to a deeper conceptual understanding of the material. We designed a study to test the hypothesis that concept mapping improves the ability of students to diagnostically discriminate between multiple endocrinopathies when compared to students who were provided with similar resources. We also looked to see if knowledge retention was correlated with concept mapping or the type of notes taken during studying.https://dune.une.edu/cetl_minigrant_posters/1001/thumbnail.jp

Bias modelling in evidence synthesis

Policy decisions often require synthesis of evidence from multiple sources, and the source studies typically vary in rigour and in relevance to the target question. We present simple methods of allowing for differences in rigour (or lack of internal bias) and relevance (or lack of external bias) in evidence synthesis. The methods are developed in the context of reanalysing a UK National Institute for Clinical Excellence technology appraisal in antenatal care, which includes eight comparative studies. Many were historically controlled, only one was a randomized trial and doses, populations and outcomes varied between studies and differed from the target UK setting. Using elicited opinion, we construct prior distributions to represent the biases in each study and perform a bias-adjusted meta-analysis. Adjustment had the effect of shifting the combined estimate away from the null by approximately 10%, and the variance of the combined estimate was almost tripled. Our generic bias modelling approach allows decisions to be based on all available evidence, with less rigorous or less relevant studies downweighted by using computationally simple methods

Student Perceptions Of Integrated Vs. Separate Basic Science And Clinical Resources

For 20 years there has been a push to integrate the basic and clinical sciences in medical school curricula. Recently, studies have suggested that cognitive integration is achieved when the relationships between basic science and clinical domains are explicitly demonstrated. In order to investigate methods that promote cognitive integration we performed a pilot study to develop and test different learning resources. We then surveyed students’ perceptions of these resources and analyzed how the resources affected their note taking. Our study suggests that the type of resources can influence the type of note-taking done by students, and that the process of taking integrated notes can enhance learning and retention. This was a pilot study and is limited by its small sample size. Additional research is planned to confirm and expand on these results.https://dune.une.edu/cetl_minigrant_posters/1000/thumbnail.jp