Interconnectedness of technology teachers’ perceptions of the design process to learner creativity

The design process (DP) is key to technology education and is considered as synonymous with problem solving, hence it undergirds all its learning aims and objectives. The Curriculum Assessment and Policy Statement (CAPS) document envisages that the design process will promote problem solving, critical thinking and creativity in learners. However, a paucity of empirical studies within the South African context illuminates the interconnectedness of DP to problem solving, critical thinking and creativity in learners for which the CAPS policy advocates. Further, there is a need to explore the interconnectedness of teachers’ perceptions of the DP, their enactment of the DP and its impact on learner creativity. This paper reports on a study that explored that interconnectedness and addressed the following research questions: What are grade 9 technology teachers’ perceptions of the design process? How do these perceptions relate to teachers’ reported enactment of the DP and creativity in learners? The conceptual framework used to model the interconnectedness that exists between teachers’ perceptions and reported enactment of the design process is Shulman’s pedagogical content knowledge model (PCK). This interpretivist study was located in the Umlazi district of KwaZulu-Natal. A case study design was used to collect qualitative data via an open-ended questionnaire and a semi-structured interview from 30 purposively selected technology teachers. Content analysis of data was undertaken in line with the conceptual framework. Our findings reflect that teachers’ perception and reported enactment of DP and the flexibility of the learning environment have an impact on opportunities for problem solving, critical thinking and creativity in learners. Our findings raise questions about the type of professional development teachers need to enact the envisaged goals of the CAPS document in respect of the DP in technology education

Assessing the compressive and impact behavior of plastic safety toe caps through computational modelling

Toe caps are one of the most important components in safety footwear, but have a significant contribution to the weight of the shoe. Efforts have been made to replace steel toe caps by polymeric ones, since they are lighter, insulated and insensitive to magnetic fields. Nevertheless, polymeric solutions require larger volumes, which has a negative impact on the shoe’s aesthetics. Therefore, safety footwear manufacturers are pursuing the development of an easy, low-cost and reliable solution to optimize this component. In this work, a solid mechanics toolbox built in the open-source computational library, OpenFOAM®, was used to simulate two laboratory standard tests (15 kN compression and 200 J impact tests). To model the polymeric material behavior, a neo-Hookean hyper-elasto-plastic material law with J2 plastic criteria was employed. A commercially available plastic toe cap was characterized, and the collected data was used for assessment purposes. Close agreements, between experimental and simulated values, were achieved for both tests, with an approximate error of 5.4% and 6.8% for the displacement value in compression and impact test simulations, respectively. The results clearly demonstrate that the employed open-source finite volume computational models offer reliable results and can support the design of toe caps for the R&D footwear industry.This work was funded by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT-Portuguese Foundation for Science and Technology under the projects UIDB/05256/2020; UIDP/05256/2020 and FAMEST-Footwear, Advanced Materials, Equipment’s and Software Technologies (POCI-01-0247-FEDER-024529)

Pacing of knowledge: Pedagogic code, pedagogic discourse, and teachers’ experiences

There is sufficient evidence to suggest that post-apartheid curriculum reform has failed to produce the desired equity in performance. Research of classroom practice in curriculum reforms preceding the current curriculum and assessment policy statement (CAPS) showed very slow pacing of knowledge as a cause for poor performance. Amongst other complex changes the CAPS regulates pacing of knowledge. Adherence to prescribed CAPS pacing has been enforced in schools via monitoring tools by hierarchical management structures. This study sought to investigate the impact of the new pacing regime on teaching and learning. The study is framed by Bernstein’s theory (2003) that pacing carries invisible social class assumptions and cognitivist theory on policy implementation (Spillane, 2002) that teacher’s individual cognition is influenced by situated cognition and policy signals. How does the new pacing regime impact the pedagogic code and pedagogic discourse in lessons? What are teachers’ views of how the new pacing regime impacts teaching and learning. Based in a qualitative research design and phenomenological case studies of classroom practice, in-depth interviews with teachers preceded by classroom observations provided the main data sources. Data analysis shows strong pacing of knowledge; impoverished pedagogic discourse and restricted opportunities to learn the elaborated pedagogic code. Curriculum policy on pacing and hierarchical monitoring of enactment of pacing bring to life a tyrannical regime of pacing that displaces the pedagogic goal of transmission and acquisition of specialized knowledge. Furthermore, teachers are solely focusing on keeping up with the prescribed pacing although they know that average and slower learners are not learning at that pace. These learners are being excluded from acquiring the elaborated pedagogic code, its abstract orientation to meaning and the specialization of their identity. It is highly possible that the current curriculum reform will fail to produce the desired social justice and equity in performance. &nbsp

Rebar Impalement Safety

This project is sponsored by Webcor with the purpose of finding a better solution to rebar impalement safety. The current rebar impalement safety caps being used by Webcor were found to frequently fall off after being installed. This results in workers being exposed to the hazard for longer than desired. The research that has been done by the team showed that rebar impalement is a serious hazard and results in injury or death every year. Site visits and interviews were performed to aid in understanding the problem and designing solutions. The customer needs, current state of the problem, existing solutions, historical data relevant to the project and the materials and methods of manufacturing were thoroughly researched and considered when designing potential solutions. The team followed the Define, Measure, Analyze, Improve and control methodology when approaching the project. Once the current state was defined and measured through research and testing of the currently available caps, the team designed and tested a new prototype cap. The tests included vertical pull tests to determine how much force was required to remove a cap, a strike test to determine how well a given cap would withstand a sudden impact to the bar it is installed on, and a durability test to compare how well different materials withstood repeated installation. After comparing the results, it was found that the new prototype outperformed the current safety caps in all tests. The two key factors of the new design that were found to be significant during testing were: the materials it was made of and the design of the interior of the cap where it’s installed onto the bar. Using the results and experiences from the testing phase the team designed a improved version of the prototype, but were unable to produce or test it due to the time constraints of the project. Several considerations were taken when designing the final design: manufacturability, materials, sustainability and durability

The Effective Use of Limited Information: Do Bid Maximums Reduce Procurement Cost in Asymmetric Auctions?

Conservation programs faced with limited budgets often use a competitive enrollment mechanism. Goals of enrollment might include minimizing program expenditures, encouraging broad participation, and inducing adoption of enhanced environmental practices. We use experimental methods to evaluate an auction mechanism that incorporates bid maximums and quality adjustments. We examine this mechanism’s performance characteristics when opportunity costs are heterogeneous across potential participants, and when costs are only approximately known by the purchaser. We find that overly stringent maximums can increase overall expenditures, and that when quality of offers is important, substantial increases in offer maximums can yield a better quality-adjusted result.

Urban Goods Movement and Local Climate Action Plans: Assessing Strategies to Reduce Greenhouse Gas Emissions from Urban Freight Transportation

This report examines how freight transport/goods movement has been addressed in U.S. city climate action planning. Transportation generally is a major contributor of greenhouse gas (GHG) emissions, and freight transport represents a growing component of transportation’s share. Almost all climate action plans (CAPs) address transportation generally, but we wished to focus on efforts to reduce GHG emissions from freight transport specifically. We analyzed 27 advanced local CAPs to determine the degree to which freight transport was targeted in goals and strategies to reduce GHG emissions. We found only six CAPs that included direct measures or programs to reduce freight emissions. Many of the CAPs mentioned general transportation objectives such as lowering vehicle miles traveled or reducing emissions from city-owned vehicle fleets, but most did not include strategies or actions that explicitly targeted freight transport. We identified the specific strategies and actions that cities are taking to address GHG emissions from freight transport, such as working with the freight community to promote anti-idling and encourage transitions to electric and alternative fuel delivery vehicles. We also analyzed freight transport plans relevant for the same cities, and found that most do not explicitly mention reducing GHG emissions. Most of the freight plans are focused on improving reliability and efficiency of freight movement, which would likely have the ancillary benefit of reducing GHG emissions, but that goal was not explicitly targeted in most of these plans. Based on our findings, we recommend that cities specifically target freight transport goals and strategies in their CAPs and better coordinate with planners developing freight transport plans to identify GHG emission reduction approaches

Design of a randomized superiority trial of a brief couple treatment for PTSD.

Interpersonal difficulties are common among veterans with posttraumatic stress disorder (PTSD) and are associated with poorer treatment response. Treatment outcomes for PTSD, including relationship functioning, improve when partners are included and engaged in the therapy process. Cognitive-behavioral conjoint therapy for PTSD (CBCT) is a manualized 15-session intervention designed for couples in which one partner has PTSD. CBCT was developed specifically to treat PTSD, engage a partner in treatment, and improve interpersonal functioning. However, recent research suggests that an abbreviated CBCT protocol may lead to sufficient gains in PTSD and relationship functioning, and yield lower dropout rates. Likewise, many veterans report a preference for receiving psychological treatments through clinical videoteleconferencing (CVT) rather than traditional face-to-face modalities that require travel to VA clinics. This manuscript describes the development and implementation of a novel randomized controlled trial (RCT) that examines the efficacy of an abbreviated 8-session version of CBCT ("brief CBCT," or B-CBCT), and compares the efficacy of this intervention delivered via CVT to traditional in-person platforms. Veterans and their partners were randomized to receive B-CBCT in a traditional Veterans Affairs office-based setting (B-CBCT-Office), CBCT through CVT with the veteran and partner at home (B-CBCT-Home), or an in office-delivered, couple-based psychoeducation control condition (PTSD Family Education). This study is the first RCT designed to investigate the delivery of B-CBCT specifically to veterans with PTSD and their partners, as well as to examine the delivery of B-CBCT over a CVT modality; findings could increase access to care to veterans with PTSD and their partners

Better Choices: Charter Incubation as a Strategy for Improving the Charter School Sector

The twenty years since Minnesota passed the nation's first charter school law have seen a great expansion in school choice, with charters operating in all but ten states and enrolling nearly two million students nationwide. Yet while parents now enjoy more schooling options for their children, a disappointing number of charter schools fail to provide excellent educations. As an authorizer of charter schools in Ohio, we struggle daily with birthing and growing high-quality charter schools -- which is why we find promising and underutilized approaches like charter incubation so appealing

Effect on signal-to-noise ratio of splitting the continuous contacts of cuff electrodes into smaller recording areas.

BackgroundCuff electrodes have been widely used chronically in different clinical applications. This neural interface has been dominantly used for nerve stimulation while interfering noise is the major issue when employed for recording purposes. Advancements have been made in rejecting extra-neural interference by using continuous ring contacts in tripolar topologies. Ring contacts provide an average of the neural activity, and thus reduce the information retrieved. Splitting these contacts into smaller recording areas could potentially increase the information content. In this study, we investigate the impact of such discretization on the Signal-to-Noise Ratio (SNR). The effect of contacts positioning and an additional short circuited pair of electrodes were also addressed.MethodsDifferent recording configurations using ring, dot, and a mixed of both contacts were studied in vitro in a frog model. An interfering signal was induced in the medium to simulate myoelectric noise. The experimental setup was design in such a way that the only difference between recordings was the configuration used. The inter-session experimental differences were taken care of by a common configuration that allowed normalization between electrode designs.ResultsIt was found that splitting all contacts into small recording areas had negative effects on noise rejection. However, if this is only applied to the central contact creating a mixed tripole configuration, a considerable and statistically significant improvement was observed. Moreover, the signal to noise ratio was equal or larger than what can be achieved with the best known configuration, namely the short circuited tripole. This suggests that for recording purposes, any tripole topology would benefit from splitting the central contact into one or more discrete contacts.ConclusionsOur results showed that a mixed tripole configuration performs better than the configuration including only ring contacts. Therefore, splitting the central ring contact of a cuff electrode into a number of dot contacts not only provides additional information but also an improved SNR. In addition, the effect of an additional pair of short circuited electrodes and the "end effect" observed with the presented method are in line with previous findings by other authors

Carers as partners in social work education

This report explores the extent and nature of participation by caregivers in the education of social work students in England. A national survey gave rise to a series of telephone interviews with education providers; regional workshops then brought together for discussion representives of carers' organisations, individual caregivers and educators. The study identified the ways in which caregivers are involved in educating social work students, the challenges experienced, the factors that facilitate positive involvement, and the outcomes experienced by those involved. The report makes a series of recommendations designed to facilitate good practice in caregiver participation in social work education