New insight into nanoparticle precipitation by electron beams in borosilicate glasses

Nanoprecipitation in different oxide glasses by means of electron irradiation in transmission electron microscopy (TEM) has been compared in this study. Upon irradiation, groups or patterns of nanoparticles with various morphologies and sizes were formed in borosilicate glasses, loaded with zinc, copper, and silver. The study successfully includes loading ranges for the target metal from doping level (1%) over medium level (20%) to majority phase (60%). It is found that particle patterning resolution is affected by parallel processes of amorphous phase separation, glass ablation, and delocalised precipitation. In addition, via an in-situ study, it is confirmed that by heating alone without irradiation, no precipitate nanoparticles form

The Burford Masons and the changing world of building practice in England, 1630-1730

Architectural history has traditionally focused on the named architect and the completed building. Investigation of the master craftsmen who realised the emerging architect's ideas while continuing to build to their own design has only recently been embarked upon. This thesis sets out to address this imbalance by scrutinising a group of master masons closely connected with Wren for over five decades. This thesis, for the first time, explores the Burford Masons, three dynasties comprising the Strongs, the Kempsters, and Ephraim Beauchamp, who rose to join the elite of mason-contractors in the rebuilding of London. Examining their experience over the period 1630-1730, it aims to shed light on building practices undergoing transition to modem methods. The research is largely based on primary sources, some hitherto untapped, which has produced a wealth of new evidence. The Burford Masons' careers are set out in Chapter Two, a Catalogue Raisonne giving the first comprehensive account of their works. The remaining chapters are thematic, Chapter Three investigating their experience after the Great Fire, a catalyst for changing building practices and their careers. Chapters Four and Five study the Burford Masons' evolving contractual arrangements, and their strategies to withstand the endemic problem of dilatory payments. Chapter Six scrutinises changes in London Masons' Company and the Burford Masons' involvement with it. Chapter Seven explores their role in design, both in conjunction with the architect and as mason-architects in their own right. It identifies them as a school of masons emerging from quarries. The research deepens knowledge of the evolution of the contracting system in both London and the provinces. It shows the Burford Masons also in the process of change, becoming interdisciplinary master-builders, entrepreneurs, and financiers

Análise estrutural e hidrogeológica do aqüífero fraturado da formação Serra Geral região noroeste do Rio Grande do Sul

Nesta pesquisa foi desenvolvida uma análise da geologia estrutural e das condições hidrogeológicas da região noroeste do estado do Rio Grande do Sul com o objetivo de caracterizar a região quanto a hidrogeologia. Para a interpretação dos dados disponíveis foram empregadas técnicas geomatemáticas. Pela análise de superfície de tendência tratou-se os dados de distribuição espacial e orientaçoes das fraturas. Os dados hidrogeológicos foram analisados através de métodos matemático-estatísticos de multivariáveis: análise de agrupamento e análise de fatores. Verificou-se ser possível o estudo do padrão de ocorrência das fraturas, assim como compartimentar a região em áreas de mesmo comportamento em relação as águas subterrâneas, identificando os parâmetros que mais influenciaram na formação dessas áreas.This study analyzed the structural geology and hydrogeological conditions in the Northwest region of the state of Rio Grande do Sul to establish the regional hydrogeology. Geomathematical techniques were utilized to interpret the available data. Data concerning spatial distribution and direction of the fractures were treated by trend surface analysis. The hydrogeological data were analyzed by mathematical-statistical multivariate methods: cluster analysis and factor analysis. It was found possible to study fracture occurrence patterns, and also to compartmentalize the region into areas of similar ground water behavior, identifying the parameters which exerted the greatest influence in the formation of these areas

Nutrition in Early Childcare Programs: The Benefits and Barriers

Introduction: 1 in 5 Vermont children experience food insecurity. Inadequate nutrition threatens cognitive, social, and emotional development in the first years of life. 49.1% of Vermont children arrive at kindergarten underprepared. It has been shown that undernourished children have reduced activity levels and withdraw from their environment, removing them from critical learning opportunities and social interactions. Supporting the provision of healthy food in early childcare programs may help address the issue of food insecurity and promote healthy childhood development. Currently, there are no existing data on both Vermont childcare providers and parents of these children on their perceptions of the importance of providing food in early childcare programs as well as the associated benefits and barriers to do so.https://scholarworks.uvm.edu/comphp_gallery/1228/thumbnail.jp

LGBTQ+ Health: Creating a Welcoming Environment in the Primary Care Office

LGBTQ+ patients are at increased risk for discrimination and poor health outcomes. Many LGBTQ+ individuals report discrimination by health care workers, including being denied needed care. Culturally competent care improves overall health outcomes. Creating a welcoming clinical environment is an important component of culturally competent care.https://scholarworks.uvm.edu/fmclerk/1220/thumbnail.jp

Team 3: Exploring the relationship of systems research to systems literacy

In this paper, the Systems Research Team (SRT) details the activities and outcomes of the 2016 IFSR Conversation in Linz, Austria. The 2016 SRT includes: Mary Edson (team leader), Pam Buckle Henning, Tim Ferris, Andreas Hieronymi, Ray Ison, Gary Metcalf, George Mobus, Nam Nguyen, David Rousseau, and Shankar Sankaran, with guest team member, Peter Tuddenham, anchoring the endeavor in Systems Literacy. While the 2014 SRT’s focus was answering the question, “What distinguishes Systems Research from other types of research?” an internal focus intended to provide grounding for researchers new to the Systems Sciences, the 2016 SRT’s focus is on reaching out to a broader community in order to provide a foundation for Systems Literacy. The team’s Conversation revolved around the question, “How can Systems Research be in service to Systems Literacy?” The team’s discussions were directed into two essential aspects, separate and integrated, of this question. First, Systems Research serves Systems Literacy by providing a credible foundation for the principles and practices of Systems Science and Systems Thinking in both systematic and systemic modes. Second, Systems Research provides a neutral frame for development of ethical applications of those principles and practices. The SRT recognizes the exigency in providing foundational principles that can be effectively adopted and disseminated through Systems Literacy. The team’s narrative begins with an understanding the urgency for application of Systems Sciences and Systems Thinking to critical issues. Systems research, as with other types of research, is typically a slow generation of results; however, the body of knowledge gained through this process can be confidently used to address complexity in timely ways. The criticality of the need for salient approaches to complexity is shown in a graphic representation of some possible trajectories of applying or not applying these Systems principles in practice. The choice of how we respond to these issues relates to a process model that can be applied. Through understanding the relationship of the process model to the trajectory, the team directed its focus to developing a MindMap (Eppler, 2006) of eight essential aspects or features of how Systems Research can support Systems Literacy. These include: Systems Science knowledge base, roles and personas, maturity models, role profile, ontology/vocabulary, perspective/framing choice, frameworks, and political ecology. Each of these eight has its own process of unpacking, which was demonstrated to the Conversation participants by delving more deeply into the aspect of knowledge base. The eight relate to unpacking the Systems landscape in a coherent but loosely coupled investment portfolio (economic, social, and relational) for building systemic sensibility in such a way as to be dis/aggregated for different audiences. The week’s work culminated in a plan for “Looking Ahead,” which outlines the intentions of the SRT to continue its activities in support of Systems Literacy in the upcoming months. An example of this continued work is a workshop, “Toward Systems Literacy, the Role of Systems Research,” that was conducted at the 60th Meeting of the International Society for the Systems Sciences in Boulder, July 25, 2016

A Multi-Time Scale Learning Mechanism for Neuromimic Processing

Learning and representing and reasoning about temporal relations, particularly causal relations, is a deep problem in artificial intelligence (AI). Learning such representations in the real world is complicated by the fact that phenomena are subject to multiple time scale influences and may operate with a strange attractor dynamic. This dissertation proposes a new computational learning mechanism, the adaptrode, which, used in a neuromimic processing architecture may help to solve some of these problems. The adaptrode is shown to emulate the dynamics of real biological synapses and represents a significant departure from the classical weighted input scheme of conventional artificial neural networks. Indeed the adaptrode is shown, by analysis of the deep structure of real synapses, to have a strong structural correspondence with the latter in terms of multi-time scale biophysical processes. Simulations of an adaptrode-based neuron and a small network of neurons are shown to have the same learning capabilities as invertebrate animals in classical conditioning. Classical conditioning is considered a fundamental learning task in animals. Furthermore, it is subject to temporal ordering constraints that fulfill the criteria of causal relations in natural systems. It may offer clues to the learning of causal relations and mechanisms for causal reasoning. The adaptrode is shown to solve an advanced problem in classical conditioning that addresses the problem of real world dynamics. A network is able to learn multiple, contrary associations that separate in time domains, that is a long-term memory can co-exist with a short-term contrary memory without destroying the former. This solves the problem of how to deal with meaningful transients while maintaining long-term memories. Possible applications of adaptrode-based neural networks are explored and suggestions for future research are made

The value landscape in ecosystem services : value, value wherefore art thou value?

Ecosystem services has risen to become one of the preeminent global policy discourses framing the way we conceive and articulate environment–society relations, integral to the form and function of a number of far-reaching international policies such as the Aichi 2020 Biodiversity Targets and the recently adopted Sustainable Development Goals. Value; its pursuit, definition, quantification, monetization, multiplicity and uncertainty, both in terms of meaning and attribution, is fundamental to the economic foundations of ecosystem services and a core feature driving its inclusion across multiple policy domains such as environmental management and conservation. Distilling current knowledge and developments in this arena are thus highly prescient. In this article, we cast a critical eye over the evidence base and aim to provide a comprehensive synthesis of what values are, why they are important and the methodological approaches employed to elicit them (including their pros and cons and the arguments for and against). We also illustrate the current ecosystem service value landscape, highlight some of the fundamental challenges in discerning and applying values, and outline future research activities. In so doing, we further advance ecosystem valuation discourse, contribute to wider debates linking ecosystem services and sustainability and strengthen connections between ecosystem services and environmental policy

Environment-mediated structure, surface redox activity and reactivity of ceria nanoparticles

Nanomaterials, with potential application as bio-medicinal agents, exploit the chemical properties of a solid, with the ability to be transported (like a molecule) to a variety of bodily compartments. However, the chemical environment can change significantly the structure and hence properties of a nanomaterial. Accordingly, its surface reactivity is critically dependent upon the nature of the (biological) environment in which it resides. Here, we use Molecular Dynamics (MD) simulation, Density Functional Theory (DFT) and aberration corrected TEM to predict and rationalise differences in structure and hence surface reactivity of ceria nanoparticles in different environments. In particular we calculate reactivity 'fingerprints' for unreduced and reduced ceria nanoparticles immersed in water and in vacuum. Our simulations predict higher activities of ceria nanoparticles, towards oxygen release, when immersed in water because the water quenches the coordinative unsaturation of surface ions. Conversely, in vacuum, surface ions relax into the body of the nanoparticle to relieve coordinative unsaturation, which increases the energy barriers associated with oxygen release. Our simulations also reveal that reduced ceria nanoparticles are more active towards surface oxygen release compared to unreduced nanoceria. In parallel, experiment is used to explore the activities of ceria nanoparticles that have suffered a change in environment. In particular, we compare the ability of ceria nanoparticles, in an aqueous environment, to scavenge superoxide radicals compared to the same batch of nanoparticles, which have first been dried and then rehydrated. The latter show a distinct reduction in activity, which we correlate to a change in the redox chemistry associated with moving between different environments. The reactivity of ceria nanoparticles is therefore not only environment dependent, but is also influenced by the transport pathway or history required to reach the particular environment in which its reactivity is to be exploited. © 2013 The Royal Society of Chemistry