631 research outputs found
Recommended from our members
Supporting Computer-supported collaborative work (CSCW) in conceptual design
In order to gain a better understanding of online conceptual collaborative design processes this paper investigates how student designers make use of a shared virtual synchronous environment when engaged in conceptual design. The software enables users to talk to each other and share sketches when they are remotely located. The paper describes a novel methodology for observing and analysing collaborative design processes by adapting the concepts of grounded theory. Rather than concentrating on narrow aspects of the final artefacts, emerging âthemesâ are generated that provide a broader picture of collaborative design process and context descriptions. Findings on the themes of âgrounding â mutual understandingâ and âsupport creativityâ complement findings from other research, while important themes associated with ânear-synchronyâ have not been emphasised in other research. From the study, a series of design recommendations are made for the development of tools to support online computer-supported collaborative work in design using a shared virtual environment
Climate change, young people, and the IPCC: the role of citizen science
This commentary suggests that undertaking citizen science research with young people has the potential to play a significant role in contributing to the IPPC and related UN research and policy processes around climate change. Further, citizen science engagement can educate and empower children and young people in and through research by involving wider communities and groups in data collection, communication, and engagement. A persuasive body of literature suggests that children and youth can be and ought to be included in citizen science projects and that young people ought to and can have a greater say in their environmental and climate lives and futures. There is acknowledgment that certain populations, including young people, have been excluded from participation in citizen science, and strategies need to be developed to be more inclusive. Moreover, through inclusion of youth, there are opportunities for intergeneration collaboration leading to potential solutions. Our commentary is a call for the IPCC to be much more open and creative in its knowledge production work and to engage young people in climate-related citizen science
Spin-orbit coupled j=1/2 iridium moments on the geometrically frustrated fcc lattice
Motivated by experiments on the double perovskites La2ZnIrO6 and La2MgIrO6,
we study the magnetism of spin-orbit coupled j=1/2 iridium moments on the
three-dimensional, geometrically frustrated, face-centered cubic lattice. The
symmetry-allowed nearest-neighbor interaction includes Heisenberg, Kitaev, and
symmetric off-diagonal exchange. A Luttinger-Tisza analysis shows a rich
variety of orders, including collinear A-type antiferromagnetism, stripe order
with moments along the [111]-direction, and incommensurate non-coplanar
spirals, and we use Monte Carlo simulations to determine their magnetic
ordering temperatures. We argue that existing thermodynamic data on these
iridates underscores the presence of a dominant Kitaev exchange, and also
suggest a resolution to the puzzle of why La2ZnIrO6 exhibits `weak'
ferromagnetism, but La2MgIrO6 does not.Comment: 5 pages, 5 figs, significantly revised to address referee comments,
to appear in PRB Rapid Com
Recommended from our members
Citizen science for conservation: towards a cleaner, greener China
Citizen science (CS) is the practice where amateurs without formal scientific training collect data to contribute to the scientific observations available to scientists and decision makers (Bonney, et al., 2009). Citizen science is increasingly utilized for environmental protection and conservation as well as related purposes such as education, access to nature, access to justice, inclusion, civics and equality or other âsocial goodsâ (Mor Barak, 2020; Makuch & Aczel, 2020). Several eco-citizen science projects are developing in China (Chen, et al., 2020; Hsu, Yeo & Weinfurter, 2020), though little research has evaluated their effectiveness in facilitating environmental protection or advancing social goods. This paper aims to identify the role and potential benefits of environmental citizen science in China to promote environmental and social objectives within the context of what has been called âauthoritarian environmentalismâ (Beeson, 2018). Through semi-structured interviews and a review of the (limited) available literature, we identify three key areas in which citizen science could potentially benefit environmental protection and promote social good in China: (1) fostering education to inform society and encourage environmental advocacy; (2) facilitating effective environmental governance through monitoring and litigation; and (3) improving data collection for biodiversity and conservation research
The lattice Schwarzian KdV equation and its symmetries
In this paper we present a set of results on the symmetries of the lattice
Schwarzian Korteweg-de Vries (lSKdV) equation. We construct the Lie point
symmetries and, using its associated spectral problem, an infinite sequence of
generalized symmetries and master symmetries. We finally show that we can use
master symmetries of the lSKdV equation to construct non-autonomous
non-integrable generalized symmetries.Comment: 11 pages, no figures. Submitted to Jour. Phys. A, Special Issue SIDE
VI
Tenzing and the importance of tool development for research efficiency
The way science is done is changing. While some tools are facilitating this change, others lag behind. The resulting mismatch between tools and researchers' workflows can be inefficient and delay the progress of research. As an example, information about the people associated with a published journal article was traditionally handled manually and unsystematically. However, as large-scale collaboration, sometimes referred to as âteam science,â is now common, a more structured and easy-to-automate approach to managing meta-data is required. In this paper we describe how the latest version of tenzing (A.O. Holcombe et al., Documenting contributions to scholarly articles using CRediT and tenzing, PLOS One 15(12) (2020)) helps researchers collect and structure contributor information efficiently and without frustration. Using tenzing as an example, we discuss the importance of efficient tools in reforming science and our experience with tool development as researchers.</p
Sound and complete axiomatizations of coalgebraic language equivalence
Coalgebras provide a uniform framework to study dynamical systems, including
several types of automata. In this paper, we make use of the coalgebraic view
on systems to investigate, in a uniform way, under which conditions calculi
that are sound and complete with respect to behavioral equivalence can be
extended to a coarser coalgebraic language equivalence, which arises from a
generalised powerset construction that determinises coalgebras. We show that
soundness and completeness are established by proving that expressions modulo
axioms of a calculus form the rational fixpoint of the given type functor. Our
main result is that the rational fixpoint of the functor , where is a
monad describing the branching of the systems (e.g. non-determinism, weights,
probability etc.), has as a quotient the rational fixpoint of the
"determinised" type functor , a lifting of to the category of
-algebras. We apply our framework to the concrete example of weighted
automata, for which we present a new sound and complete calculus for weighted
language equivalence. As a special case, we obtain non-deterministic automata,
where we recover Rabinovich's sound and complete calculus for language
equivalence.Comment: Corrected version of published journal articl
- âŠ