Exploring Science Teachers’ Self-Efficacy Perceptions to Teach in Ontario’s Diverse Classrooms: A Mixed-Methods Investigation

In the past few years, Canadian schools have experienced increasing diversity with a large number of English Language Learners (ELLs) becoming part of the mainstream classroom. Research has shown that ELLs will achieve academic success when their backgrounds are incorporated within the curriculum and pedagogy (Gay, 2000). However, our curriculum is largely Eurocentric and caters predominantly to mainstream students. As a result, it has become critical to investigate teachers’ perceptions in terms of providing inclusive pedagogy in various classroom contexts. Hence, the purpose of this study was to examine the self-efficacy perceptions of Ontario’s Science teachers to teach in diverse classrooms. Theories of self-efficacy (Bandura, 1997) and culturally responsive pedagogy (Gay, 2000) frame this research. A mixed methods approach was employed including surveys (N = 76) and interviews (n = 10) of Ontario’s K-12 Science teachers. Quantitative and qualitative data were analyzed to explore teachers’ self-efficacy perceptions overall and on general and culturally responsive pedagogical practices. Additionally, data were analyzed to explore the correlation between the teachers’ demographic characteristics including the grade-level, their linguistic background and experience and their self-efficacy perceptions. Findings revealed that teachers’ self-efficacy perceptions in providing culturally responsive pedagogy are significantly lower in comparison to providing general pedagogy. Also, demographic factors did not have any correlation with their self-efficacy perceptions. Interview data revealed that teachers face a number of challenges amidst diverse classrooms. Considering that self-efficacy perceptions influence teachers’ behaviour, this research has shed light on issues related to inclusive pedagogical practices that need to be targeted

THE LEXICON OF SCIENCE: EXTRACTING THE SCIENTIFIC VOCABULARY FROM WRITTEN AND SPOKEN CORPORA

This study examined the nature and frequency of scientific vocabulary encountered in Science classrooms. The corpora that were analyzed include a Science textbook used at the 10th-grade level as well as transcripts of teacher-fronted lectures on three occasions. Interviews with one Science teacher were also conducted in order to understand the context of a secondary Science classroom in Ontario. Approximately 15% of the lexicon from the total corpora was scientific in nature. From the analysis of the scientific vocabulary, six lexical classes emerged with varying proportions between the written and the spoken corpora. Complexities of the scientific lexicon as realized from this study reveal that scientific vocabulary forms an extensive portion of the total corpus which makes explicit vocabulary instruction extremely important for all students, especially ELLs

Indigenous peoples and accounting: A systematic literature review

The purpose of this systematic literature review on ‘indigenous peoples and accounting’ is to identify major themes and derive insights to guide future research and policy agendas. We also investigate whether accounting has been used by the indigenous peoples for emancipation. Seventy-one peer-reviewed journal articles are categorised into three clusters (imperialism, accounting profession and need for emancipation) and analysed. This review positions accounting not as a mere neutral, benign, technical practice but as a racist and ethnocentric tool through the context in which it has been practised. Accounting was an integral part of imperial rule, inheriting colonial structures and separating and reducing indigenous peoples from their own cultures and structures. Indigenous accountants remain severely under-represented; indigenous autonomy, voice and participation are vital for transforming the ethnocentric systems that have led to the devaluation of indigenous peoples. For effecting change we identify a need to focus on forward-looking solutions and how indigenous cultural values can contribute to a more enabling accounting

THE EFFECT OF A NAVIGATIONAL AID ON TRAINING OF A MINIMALLY INVASIVE SURGERY CAMERA TASK

Minimally Invasive Surgery (MIS) differs from Open Surgery as surgeons view the surgical site indirectly on a monitor. The view shown is typically from an angled endoscope off to one side of the surgery (i.e., uncollocated with the view of the hands). This makes camera navigation a challenging ability to learn. MIS thus requires longer training periods, more practice and mental effort to achieve proficiency. Current training setups and Operating Room (OR) environments lack appropriate real-time visual cues for navigation and other perception related information that could help with learning and performance in the OR. The purpose of this research was to design and develop graphical aids for improving understanding of camera navigation and depth perception in a trainer box necessary for enhancing surgeon’s skills to perform endoscopic surgery. For the former, two alternate training methods: 1) using no graphics (control group) and 2) using three different types of graphics conveying different information, were considered for this study. The effectiveness of the training was evaluated by a comparative analysis of different performance measures across all the groups. It was observed that training using graphics did improve the performance of participants in performing a minimally invasive surgery training task. For the latter, the use of a proximity sensor was explored

Mitotic Regulators Govern Progress through Steps in the Centrosome Duplication Cycle

Centrosome duplication is marked by discrete changes in centriole structure that occur in lockstep with cell cycle transitions. We show that mitotic regulators govern steps in centriole replication in Drosophila embryos. Cdc25string, the expression of which initiates mitosis, is required for completion of daughter centriole assembly. Cdc20fizzy, which is required for the metaphase-anaphase transition, is required for timely disengagement of mother and daughter centrioles. Stabilization of mitotic cyclins, which prevents exit from mitosis, blocks assembly of new daughter centrioles. Common regulation of the nuclear and centrosome cycles by mitotic regulators may ensure precise duplication of the centrosome

Application of column buckling theory to steel aluminium foam sandwich panels

In steel structures, a lot of attention is paid to lightweight structures, i.e. reduction of dead load without compromising structural safety, integrity and performance. Thanks to modern steel aluminium foam sandwich panel manufacturing technology a new possibility became available for lightweight structural design. Assessment and understanding of the behaviour of this sandwich panel under in-plane compression or flexure is crucial before its application in steel structures. Column buckling theory is considered and applied to the steel aluminium foam sandwich panel to evaluate its behaviour under in-plane compressive load. In this work, various assumptions are made to generalise Euler’s buckling formula. The generalisation requires modification of the buckling stiffness expression to account for sandwich panel composite properties. The modified analytical expression is verified with finite element simulation employing various material models specific to steel faceplates and aluminium foam as well as various geometric imperfections. Based on this study, it can be concluded that Euler’s buckling formula can be successfully modified and used in the prediction of the load-carrying capacity of a sandwich panel

A comparison of some dynamic load-balancing algorithms for a parallel adaptive flow solver

In this paper we contrast the performance of a number of different parallel dynamic load-balancing algorithms when used in conjunction with a particular parallel, adaptive, time-dependent, 3D flow solver. An overview of this solver is given along with a description of the dynamic load-balancing problem that results from its use. Two recently published parallel dynamic load-balancing software tools are then briefly described and a number of recursive parallel dynamic load-balancing techniques are also outlined. The effectiveness of each of these algorithms is then assessed when they are coupled with the parallel adaptive solver and used to tackle a model 3D flow problem

Flexural characterization of a novel recycled-based polymer blend for structural applications

The use of recycled plastic in construction fields, among others, is becoming a turning point for resolving significant related problems such as resource management, sustainability and plastic waste generation. Hence, in the context of sustainability, the "Three R’s": reduce, reuse and recycle, are getting more attention day after day. There has been a huge surge in the recycling and reuse of plastic composites due to their eco-friendliness, lightweight, life cycle superiority and low cost. However, because of a lack of knowledge of their performance and behavior, their application is still limited in the real world. The aim of this research is to understand the behavior of recycled plastic and derive its material properties which can be used in the design of structural and non-structural elements. In the present study, three stiffened plates are manufactured from 80% of recycled plastic (around 50% of recycled Polypropylene rPP, and around 50% of High Density Polyethylene PEHD with a little part of Low Density Polyethylene PELD) and 20% of virgin polypropylene PP Copolymer. Three-point bending test is performed on the three specimens. In the experimental campaign, the behavior of these stiffened plates under pure bending loads has been studied. After that, the material properties are extracted from the data collected during the experiment using Ramberg–Osgood equation. Then, once implemented in finite elementcmodels, it was observed that the simulated material shows similar behavior to the one registered during the experiment. As a conclusion, the derived material properties show reliability and they can be used to study a design of a structural or non-structural component including recycled plastic