Continuing professional development for the early years workforce in England since 2015: a synthesis of survey data highlighting commonalities, discrepancies and gaps

Continuing Professional Development (CPD) is an essential aspect of Early Years (EY) workforce planning. In understanding how CPD is currently provided, we depend largely on surveys carried out by separate sector organisations with little synthesis of the data. In this paper, we scrutinise findings relating to CPD from nine surveys of EY managers and practitioners carried out by three well-established sector organisations since 2015. We highlight commonalities, discrepancies and gaps in the data. On the basis of this analysis, we highlight the need for further investigation around what constitutes CPD in the EY sector, what are perceived to be ‘quality’ experiences, CPD accreditation and the leadership and management of CPD in settings. We recommend gathering more detailed and accurate data about CPD through practitioner logs completed as and when CPD is undertaken, as opposed to retrospective surveys

An algorithm for optimal sizing of the capacitor banks under non-sinusoidal and unbalanced conditions

In non-sinusoidal and unbalanced systems, optimal sizing of the capacitor banks is not a straightforward task as in sinusoidal and balanced systems. In this paper, by means of qualitative and quantitative analysis, it is interpreted that the classical capacitor selection algorithm widely implemented in Reactive Power Control (RPC) relays does not achieve optimal power factor improvement in non-sinusoidal and unbalanced systems. Accordingly, a computationally efficient algorithm is proposed to find the optimal capacitor bank for smart RPC relays. It is further shown in a simulated test case by using Matlab software that the proposed algorithm provides better power factor improvement when compared with the classical algorithm. It is also figured out from the simulation results that both algorithms cause almost the same harmonic distortion and unbalance deterioration levels in the system

Spectral and Directional Control of Thermal Emission with Nanophotonics

Thermal emission is a ubiquitous phenomenon required in many applications, including thermophotovoltaics (TPV), selective solar absorption, and infrared spectroscopy. Making it selective can greatly improve application performance. Here, selectivity is achieved using engineered photonic structures. Two specific design scenarios are discussed for different applications. The first scenario considers angular and spectral selectivity for TPV heat-to-electricity conversion. The second scenario excludes emission towards specific directions, with potential applications in daytime radiative cooling and sensitive IR detectors. In both scenarios, optical modeling is performed using rigorous coupled wave analysis, finite-difference time domain simulations, plus Kirchhoffs law of thermal radiation. In the first scenario, TPV efficiency is enhanced by matching the emitters photonic bandgap to the PV electronic bandgap. A rare earth-based spectrally selective emitter with integrated filter is proposed, where theoretical efficiencies can approach 38%. To aid this goal, the proportion of emitted heat intercepted by the PV diode, or the view factor, should be maximized. Hence, symmetric sensitive metallic grating emitters are proposed to restrict directionality. Then, spectral and angular selectivity are combined using doped oxide thin films and high contrast gratings. A relative enhancement of TPV system efficiency of 3.9x is expected using the proposed selective emitters at large separation distances. In the second scenario, directional emission exclusion is achieved using high contrast meta-surfaces. A nearly-complete reduction of heat exchange by 99.77% is shown between an engineered emitter and a distant receiver, and by 77% between an emitter covered by sets of metasurfaces and a nearby target

Exploring whole body interaction and design for museums

Museums increasingly use digital technology to enhance exhibition experiences for families, notably in relation to physically mediated installations for young children through natural user interfaces. Yet little is known about how families and children engage with such installations and the kinds of interactive experiences they engender in museum spaces. This paper addresses a pressing need for research to adopt an analytical focus on the body during such digitally mediated interactions in order to understand how bodily interaction contributes to meaning making in the museum context. It reports an observation study of families and children interacting with a whole-body interface (using Kinect) in the context of an installation in a museum exhibit on rare Chinese paintings. The study shows how the installation design engenders particular forms of bodily interaction, collaboration and meaning making. It also contributes design insights into whole-body interaction installations in museums and public spaces

Mobile experiences of historical place: a multimodal analysis of emotional engagement

This article explores how to research the opportunities for emotional engagement that mobile technologies provide for the design and enactment of learning environments. In the context of mobile technologies that foster location-based linking, we make the case for the centrality of in situ real-time observational research on how emotional engagement unfolds and for the inclusion of bodily aspects of interaction. We propose that multimodal methods offer tools for observing emotion as a central facet of person–environment interaction and provide an example of these methods put into practice for a study of emotional engagement in mobile history learning. A multimodal analysis of video data from 16 pairs of 9- to 10-year-olds learning about the World War II history of their local Common is used to illustrate how students’ emotional engagement was supported by their use of mobile devices through multimodal layering and linking of stimuli, the creation of digital artifacts, and changes in pace. These findings are significant for understanding the role of digital augmentation in fostering emotional engagement in history learning, informing how digital augmentation can be designed to effectively foster emotional engagement for learning, and providing insight into the benefits of multimodality as an analytical approach for examining emotion through bodily interaction

Coherent back-scattering near the two-dimensional metal-insulator transition

We have studied corrections to conductivity due to the coherent backscattering in low-disordered two-dimensional electron systems in silicon for a range of electron densities including the vicinity of the metal-insulator transition, where the dramatic increase of the spin susceptibility has been observed earlier. We show that the corrections, which exist deeper in the metallic phase, weaken upon approaching to the transition and practically vanish at the critical density, thus suggesting that the localization is suppressed near and at the transition even in zero field.Comment: to appear in PR

Responses of cork oak seedlings to short-term exposures to low temperatures.

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