Zooplankton variability in the Northern Salish Sea over the past 3 decades, and relationships with Coho salmon

The past 30 years have seen huge changes in the populations of Pacific salmon in the Salish Sea. These changes include very large reductions in the abundances of Chinook and Coho, and high variability of Fraser River Sockeye salmon populations. The Salish Sea Marine Survival Program is a Canada – U.S. collaborative multi-year research initiative established to investigate two main questions: what has driven the very strong declines in abundances of Coho and Chinook populations in the Salish Sea since the 1980s, and what determines the interannual variability of present populations. In this study we examine these two questions from the perspective of zooplankton (including ichthyoplankton) populations in the Salish Sea since 1990. We identify interannual trends of total zooplankton biomass, and of its major constituents including those taxa identified as comprising important dietary items for Coho, Chinook, and Sockeye. We identify years with significant changes in zooplankton taxonomic composition, and compare these with environmental variables to identify potential “drivers of change” in these ecosystem. We conclude with analyses of how these relationships relate to variability in the key salmon species of this region

Tuning biexciton binding and anti-binding in core/shell quantum dots

We use a path integral quantum Monte Carlo method to simulate excitons and biexcitons in core shell nanocrystals with Type-I, II and quasi-Type II band alignments. Quantum Monte Carlo techniques allow for all quantum correlations to be included when determining the thermal ground state, thus producing accurate predictions of biexciton binding. These subtle quantum correlations are found to cause the biexciton to be binding with Type-I carrier localization and strongly anti-binding with Type-II carrier localization, in agreement with experiment for both core shell nanocrystals and dot in rod nanocrystal structures. Simple treatments based on perturbative approaches are shown to miss this important transition in the biexciton binding. Understanding these correlations offers prospects to engineer strong biexciton anti-binding which is crucial to the design of nanocrystals for single exciton lasing applications.Comment: 10 pages, 11 figure

Coulomb effects in the absorbance spectra of two-dimensional Dirac materials

A wide range of materials like graphene, topological insulators and transition metal dichalcogenides (TMDs) share an interesting property: the low energy excitations behave as Dirac particles. This emergent behavior of Dirac quasiparticles defines a large class of media that are usually called Dirac materials. The linear and nonlinear optical properties of Dirac materials with a gap are still largely unexplored, and in this Letter we build the foundations of a novel way to study the linear optical properties of these two-dimensional media. Our approach is based on a new Dirac-like formulation of the standard semiconductor Bloch equations used in semiconductor physics. We provide an explicit expression of the linear absorbance -- which we call the relativistic Elliott formula -- and use this to quantify the variation of the continuum absorbance spectrum with the strength of the Coulomb interaction (the Sommerfeld factor). Our calculations also show how the Coulomb enhancements scales with the bandgap and vanishes for zero bandgap, shedding new light on the behaviour of graphene for low light intensities. The results presented are in good quantitative agreement with published experimental results. Our new theory will allow researchers to explore the nonlinear interactions of intense, ultrashort pulses with TMDs, and the framework is flexible enough to be adapted to different experimental situations, such as cavities, multilayers, heterostructures and microresonators

Developing self-regulated learning through the use of meta-cognitive strategies in adventure-based activities

This research investigates the benefits of adventure-based activities used as a learning experience at school level. In order to scientifically investigate these benefits the study is located at a school where an adventure-based programme is being developed as part of the school's curriculum. This programme consists of a range of adventure type experiences including, rock climbing, abseiling, canoeing, mountain biking, group dynamic activities, survival camps, ropes courses and adventure racing. At Lilyfontein School these activities form part of the Life Orientation and life Skill programmes from grade 1 to grade 11. Specialized and qualified staff are used to conduct some of these programmes. Adventure-based activities are rigorous and contain elements of risk which require problem solving, good decision making and sound emotional management. These aspects present both physical and mental challenges to any participant. This study postulates that learners engaged in these adventure type activities are faced with using meta-cognitive strategies to help them through these mental and physical challenges. In doing these activities regularly learners will develop meta-cognitive strategies that will enable them to become better self-regulated learners. A self-regulated learner is able to use meta-cognitive strategies like problem solving, decision making, selfevaluation, self-monitoring, self-reflective thinking or emotional control in life generally. The aim of this research is to conduct an on-going action research study of the adventure-based programmes to determine their worth for the learners at Lilyfontein School and consequently the future of such experiences in a school's curriculum. This forms the primary goal of this research. The secondary goal is to gather valid and reliable evidence required to make an argument for the School's Governing Body (SGB) and Curriculum Development Committee (CDC) to be able to substantiate decisions relating to any such future programmes. This research regards the school context as the activity system which forms a primary case study. In order to extract maximum information from this educational system, embedded case studies will be conducted and monitored. These embedded case studies will be made up of the following groups of people: firstly the learners engaged in a variety of adventure-based experiences, secondly the educators as they observe and perceive the consequences of these experiences, and thirdly the parents as they identifY possible influences of adventure-based experiences on the behaviours, beliefs or habits of their children. In this research study data collecting techniques are used to extract infonnation from the embedded cases. Infonnation is elicited from parents and educators through the use of questionnaires and interviews. For learners, narratives and interviews are used to get a more qualitative sense of their beliefs and feelings on adventure-based experiences. However, in order to capture and document the learners' use of metacognitive strategies as they engage in the rigours of an adventure-based activity a more empirical approach is used. This approach uses in-depth observation, recording and measuring of the learners in action. Video footage is used to record the learners' reactions as they battle with fear, mental-strength, fatigue and decision making to accomplish their goal during an adventure activity. This study claims that an adventure-based experience helps to mediate the learning that will develop selfregulatory strategies in a learner. The limited research in the adventure-based learning field and more significantly the lack of empirical evidence of how meta-cognitive strategies fonn a crucial component of adventure-based activities has meant that the researcher has developed his own recording, measuring and analytical tools to serve this end. He has chosen to use Engestrom's third generation Activity Theory model which provides a useful underlying theory as well as an analytical and interpretive framework for this study. The research was conducted over a period of three years. Findings are considered in relation to the National Curriculum Statement for the GET and FET bands to ensure its relevance in the school context to the National Department of Education's expectations for the Life Orientation curriculum. The empirical findings of this study at Lilyfontein School and their relevance to the curriculum content of the National Curriculum Statement ought to provide convincing data for very important curriculum policy decisions at Lilyfontein School and in the broader educational context

The development and validation of a global advanced development framework for the pharmacy workforce: a four-stage multi-methods approach

Background: Studies have indicated that a generalisable and translatable global framework is a useful tool for supporting career progression and recognising advanced practice. / Aim: To develop and validate a global advanced competency development framework as a tool to advance the pharmacy profession globally. / Method: A four-stage multi-methods approach was adopted. In sequence, this comprised an assessment of initial content and a cultural validation of the advanced level framework. Following this, we conducted a transnational modified Delphi followed by an online survey sampling the global pharmacy leadership community. Finally, a series of case studies was constructed exemplifying the framework implementation. / Results: Initial validation resulted in a modified draft competency framework comprising 34 developmental competencies across six clusters. Each competency has three phases of advancement to support practitioner progression. The modified Delphi stage provided feedback on framework modifications related to cultural issues, including missing competencies and framework comprehensiveness. External engagement and case study stages provided further validity on the framework implementation and dissemination. / Conclusion: The four-staged approach demonstrated transnational validation of a global advanced competency framework as a mapping and development tool for the pharmacy professions. Further study is needed to develop a global glossary of terminologies on advanced and specialist practice. Also, developing an accompanying professional recognition system and education and training programmes to support framework implementation is recommended

Strengthening Primary Healthcare through accelerated advancement of the global pharmacy workforce: a cross-sectional survey of 88 countries

Objective: Advancing the pharmacy workforce contributes to strengthening primary healthcare and accelerating progress towards universal health coverage. This study aimed to identify key enablers to support policy development for national pharmacy workforce advancement. // Design: A cross-sectional country-level questionnaire was distributed from July 2018 to March 2019. // Setting: National-level or country-level pharmacy workforce development policy. // Participants: Professional leadership associations and national agencies of the International Pharmaceutical Federation (FIP). The FIP global database included 129 countries. // Measures: The questionnaire was designed to collate data on the scope of advanced and specialist practice in respondent countries. Multiple correspondence analysis and subsequent cluster analysis were conducted to explore the associations and patterns of country-level attributes of systems in place for the pharmacy workforce advancement in order to develop a general transnational model for country-level advanced practice development. // Results: Eighty-eight countries (68.2% response rate) responded to the questionnaire. Factors that enhance and contribute to advanced practice policy development include the country’s socioeconomic factors and the availability of national practice advancement concepts. The essential advancement concepts include the availability of framework and professional recognition systems, programmes assisting advanced practice development and workforce advancement and recognition opportunities. Cluster analysis identified three clusters of country respondents. First cluster included low-income and middle-income with poor pharmacy advancement implementation, second cluster included a higher socioeconomic status with weaker pharmacy workforce advancement implementation and third cluster included upper middle-income to high-income countries and high rates of pharmacy advancement implementation. // Conclusion: The key factors identified in this study can be used to support a transnational approach to pharmacy workforce advancement. The three clusters identified highlighted that workforce advancement was not an exclusive trait of higher-income countries. Lessons from countries that have already adopted concepts of advancement in pharmacy practice could be adopted to other countries to accelerate the progress of advanced practice globally

Practitioner experience of the impact of humanistic methods on autism practice : a preliminary study

Purpose: Autistic people are subject to having their behaviour shaped from a variety of practitioners predominantly using behaviourist methodologies. Little is known about how learning alternative humanistic methodologies impacts practitioner experiences of relational encounters with autistic people. This paper aims to develop an understanding of practitioner experiences of using person-centred counselling (PCC) skills and contact reflections (CR) when engaging with autistic people. Design/methodology/approach: This qualitative study used an interpretive approach to help elucidate perceptions of changing practice. It involved a framework analysis of 20 practitioner’s experiential case study accounts. Findings: An overarching theme emerged: subtle transformations resulted from shifting practice paradigms. Four broad themes were identified: “A different way of being”; “Opening heightened channels of receptivity”; “Trust in self-actualising growth” and “Expanding relational ripples”. The findings suggest that PCC and CRs skills training shows promise in providing practitioners with a different way of being with autistic people that enhances their capacity towards neurotypical-neurodivergent intersubjectivity. Social implications: The authors speculate on the power dynamics of care relationships and those who may identify as possessing autism expertise. The authors are curious as to whether this humanistic skills training can truly penetrate practitioner core values and see this as a fundamental issue which requires further investigation. Originality/value: To the best of the authors’ knowledge, this is the first study to provide a qualitative account of autism practitioner reflections following training in humanistic methodologies. It challenges the concept of autism expertise, guided by a pathologiSing model, focused on fixing a problem located in the person, which conceals the removal of personhood

Population Genetic Structure of Aldabra Giant Tortoises

Evolution of population structure on islands is the result of physical processes linked to volcanism, orogenic events, changes in sea level, as well as habitat variation. We assessed patterns of genetic structure in the giant tortoise of the Aldabra atoll, where previous ecological studies suggested population subdivisions as a result of landscape discontinuity due to unsuitable habitat and island separation. Analysis of mitochondrial DNA (mtDNA) control region sequences and allelic variation at 8 microsatellite loci were conducted on tortoises sampled in 3 locations on the 2 major islands of Aldabra. We found no variation in mtDNA sequences. This pattern corroborated earlier work supporting the occurrence of a founding event during the last interglacial period and a further reduction in genetic variability during historical time. On the other hand, significant population structure recorded at nuclear loci suggested allopatric divergence possibly due to geographical barriers among islands and ecological partitions hindering tortoise movements within islands. This is the first attempt to study the population genetics of Aldabra tortoises, which are now at carrying capacity in an isolated terrestrial ecosystem where ecological factors appear to have a strong influence on population dynamic