The principles of Educational Robotic Applications (ERA): a framework for understanding and developing educational robots and their activities

The original educational robots were the Logo Turtles. They derived their rationale from constructionism. How has this changed? This paper postulates ten principles that underpin the effective utilisation of robotic devices within education settings. We argue that they form a framework still sympathetic to constructionism that can guide the development, application and evaluation of educational robots. They articulate a summary of the existing knowledge as well as suggesting further avenues of research that may be shared by educationists and designers. The principles also provide an evaluative framework for Educational Robotic Applications (ERA). This paper is an overview of the ideas, which we will develop in future papers

The e-Robot Project: a longitudinal on-line research collaboration to investigate ERA principles

The Educational Robotic Application (ERA) Principles provides a framework for evaluating Educational Robots and their activities. This paper presents the rationale behind the proposed e-Robot Project, an online community based research resource aimed at gathering data on the use of educational robotics. Collating the data against ERA is an iterative process that will simultaneously verify and improve ERA, which in turn will inform the design and application of educational robotics. e-Robot involves all aspects of the research process from research design to meta-analysis. The project can run indefinitely and will encourage participation from student teachers, teachers, researchers, developers, administrators, politicians and other interested parties

Semantic change in portuguese: Considering cerrado and vereda

© 2020, Universiti Kebangsaan Malaysia Press. All rights reserved. This paper highlights the process by which meaning instantiates itself in word formation and discusses how semantic change installs subsequently in them, in this case, the Portuguese words cerrado and vereda. These two words have long individual histories that can be tracked back to their Latin or Celtic etymons, cerrado rooted in the origin of the Latin verb serāre, which gave origin to the Portuguese verb cerrar (to close, to seal) and vereda (narrow path) derived from the Latin word veredus (horse), which has its root in the Celtic word voredos. Yet, in the modern Brazilian context, Cerrado designates a particular ecosystem, the second largest biome in the country, that of short, closely-packed trees and foliage, and Vereda, a verdant subsystem of the same ecosystem. The discussion tracks the linguistic movement to arrive at these current meanings, showing how understanding the “history” of a word helps to understand both the uniqueness of its morpho-phonological and semantic constitution, as well as that of its relationship with the object it designates in the empirical world

Conservation of a pH-sensitive structure in the C-terminal region of spider silk extends across the entire silk gene family

Spiders produce multiple silks with different physical properties that allow them to occupy a diverse range of ecological niches, including the underwater environment. Despite this functional diversity, past molecular analyses show a high degree of amino acid sequence similarity between C-terminal regions of silk genes that appear to be independent of the physical properties of the resulting silks; instead, this domain is crucial to the formation of silk fibres. Here we present an analysis of the C-terminal domain of all known types of spider silk and include silk sequences from the spider Argyroneta aquatica, which spins the majority of its silk underwater. Our work indicates that spiders have retained a highly conserved mechanism of silk assembly, despite the extraordinary diversification of species, silk types and applications of silk over 350 million years. Sequence analysis of the silk C-terminal domain across the entire gene family shows the conservation of two uncommon amino acids that are implicated in the formation of a salt bridge, a functional bond essential to protein assembly. This conservation extends to the novel sequences isolated from A. aquatica. This finding is relevant to research regarding the artificial synthesis of spider silk, suggesting that synthesis of all silk types will be possible using a single process

The Spider Silk Standardization Initiative (S3I): A powerful tool to harness biological variability and to systematize the characterization of major ampullate silk fibers spun by spiders from suburban Sydney, Australia.

The true stress-true strain curves of 11 Australian spider species from the Entelegynae lineage were tensile tested and classified based on the values of the alignment parameter, α*, in the framework of the Spider Silk Standardization Initiative (S3I). The application of the S3I methodology allowed the determination of the alignment parameter in all cases, and were found to range between α* = 0.03 and α* = 0.65. These data, in combination with previous results on other species included in the Initiative, were exploited to illustrate the potential of this approach by testing two simple hypotheses on the distribution of the alignment parameter throughout the lineage: (1) whether a uniform distribution may be compatible with the values obtained from the studied species, and (2) whether any trend may be established between the distribution of the α* parameter and phylogeny. In this regard, the lowest values of the α* parameter are found in some representatives of the Araneidae group, and larger values seem to be found as the evolutionary distance from this group increases. However, a significant number of outliers to this apparent general trend in terms of the values of the α* parameter are described

From fibres to adhesives: evolution of spider capture threads from web anchors by radical changes in silk gland function.

Spider webs that serve as snares are one of the most fascinating and abundant type of animal architectures. In many cases they include an adhesive coating of silk lines-so-called viscid silk-for prey capture. The evolutionary switch from silk secretions forming solid fibres to soft aqueous adhesives remains an open question in the understanding of spider silk evolution. Here we functionally and chemically characterized the secretions of two types of silk glands and their behavioural use in the cellar spider, Pholcus phalangioides. Both being derived from the same ancestral gland type that produces fibres with a solidifying glue coat, the two types produce respectively a quickly solidifying glue applied in thread anchorages and prey wraps, or a permanently tacky glue deployed in snares. We found that the latter is characterized by a high concentration of organic salts and reduced spidroin content, showing up a possible pathway for the evolution of viscid properties by hygroscopic-salt-mediated hydration of solidifying adhesives. Understanding the underlying molecular basis for such radical switches in material properties not only helps to better understand the evolutionary origins and versatility of ecologically impactful spider web architectures, but also informs the bioengineering of spider silk-based products with tailored properties

Structure and Optical Anisotropy of Spider Scales and Silk: The Use of Chromaticity and Azimuth Colors to Optically Characterize Complex Biological Structures.

Herein, we give an overview of several less explored structural and optical characterization techniques useful for biomaterials. New insights into the structure of natural fibers such as spider silk can be gained with minimal sample preparation. Electromagnetic radiation (EMR) over a broad range of wavelengths (from X-ray to THz) provides information of the structure of the material at correspondingly different length scales (nm-to-mm). When the sample features, such as the alignment of certain fibers, cannot be characterized optically, polarization analysis of the optical images can provide further information on feature alignment. The 3D complexity of biological samples necessitates that there be feature measurements and characterization over a large range of length scales. We discuss the issue of characterizing complex shapes by analysis of the link between the color and structure of spider scales and silk. For example, it is shown that the green-blue color of a spider scale is dominated by the chitin slab's Fabry-Pérot-type reflectivity rather than the surface nanostructure. The use of a chromaticity plot simplifies complex spectra and enables quantification of the apparent colors. All the experimental data presented herein are used to support the discussion on the structure-color link in the characterization of materials

The long-term impact of COVID-19 on nursing: An e-panel discussion from the International Network for Child and Family Centred Care

Aim To explore the International Network for Child and Family Centred Care (INCFCC) members\u27 experiences and views on the long-term impact of COVID-19 on the nursing workforce. Background On the 11 March 2020, the World Health Organization declared COVID-19 a global pandemic. While some countries adopted a herd immunity approach, others imposed stricter measures to reduce the transmission of the virus. Hospitals in some countries faced an avalanche of extremely sick admissions, whereas others experienced an early surge in cases or were able to control the spread. Design Discursive paper. Methods A web-based survey was e-mailed to 63 INCFCC members from 28 March to 30 April 2022, as an invitation to share their experience concerning the long-term impact of COVID-19 on their role as a nurse educator, clinician or researcher. Results Sixteen members responded, and the responses were grouped under the themes stress and anxiety, safe staffing and pay, doing things differently, impact on research, impact on teaching and learning, impact on clinical practice, nursing made visible and lessons for the future. Conclusion The INCFCC members provided their views and highlighted the impact on their role in nursing education, administration, research and/or practice. This discussion of international perspectives on the similarities and differences imposed by COVID-19 found that the impact was wide-ranging and prolonged. The overarching theme revealed the resilience of the participating members in the face of COVID-19. Relevance to Clinical Practice This study highlights the importance of all areas of nursing, be it in academia or in clinical practice, to work together to learn from the present and to plan for the future. Future work should focus on supporting organizational and personal resiliency and effective interventions to support the nursing workforce both during a disaster and in the recovery phase. Nursing workforce resilience in the face of COVID-19

The journey travelled – A view of two settings a decade apart

Inclusion is generally recognized as an ongoing, active process which reflects shifts in policies, practice and values as well as political choices made over long periods of time. Although intended as a transformative concept it can also represent a messy compromise between congealed policy positions and contradictory practices. Against this background of compromise and dissatisfaction, this study aims to examine how two schools with clear inclusive aspirations and intentions have weathered the last decade. Drawing upon two research visits ten years apart in which the schools were filmed and members of the school community were interviewed, this study reports on their perception of the journey travelled. Data from the study shows that in both cases there was a shift away from practices which were previously seen as being a route towards greater inclusion. The causes for these shifts were political, economic and social factors underpinned by the pervasive influence of the special education and medical model on the two schools’ practice and principles