Behaviour of sandy soil subjected to dynamic loading

This thesis presents the kinematics occurring during lab-based dynamic compaction tests using high speed photography and image correlation techniques. High speed photography and X-ray microtomography have been used to analyse the behaviour of sandy soil subjected to dynamic impact. In particular, the densification mechanism of granular soils due to dynamic compaction is the main theme of the thesis. High speed photography and digital image correlation (DIC) techniques have enabled the deformation patterns, soil strains and strain localisations to be observed. Image correlation and X-ray scans revealed the formation, rate and growth of narrow tabular bands of intense deformation and significant volumetric change and provided answers towards a better understanding of the densification mechanism in dry granular soils due to dynamic compaction. As a quantitative tool, high speed photography has allowed the propagation of localised deformation and strain fields to be identified and has suggested that compaction shock bands control the kinematics of dynamic compaction. The displacement and strain results from high speed photography showed that soil deformation in the dynamic tests was dominated by a general bearing capacity mechanism similar to that widely stated in classic soil mechanics texts. Comparative static loading tests have been conducted to enable the dynamic effects to be clearly distinguished. This has enabled the densification process taking place below the soil surface to be investigated and identified. Simulations of the physical models were carried out using LS-DYNA finite element formulations for comparison and verification purposes. The FE simulations verified the general characteristics from the photography findings. However, simulation results were unable to predict the exact details of the strain localisation due to surface impacts during physical model tests

Attachment and intervention in adoptive families with and without biological children

Wetensch. publ. refereedFaculteit der Sociale Wetenschappe

Analysis of coelom development in the sea urchin Holopneustes purpurescens yielding a deuterostome body plan

Companion Research Data "Two Z stacks of coelomogenesis in vestibula larvae of the sea urchin Holopneustes purpurescens recorded by high resolution confocal laser scanning microscopy from Morris (2016)" at http://hdl.handle.net/2123/14227An analysis of early coelom development in the echinoid Holopneustes purpurescens yields a deuterostome body plan that explains the disparity between the pentameral plan of echinoderms and the bilateral plans of chordates and hemichordates, the three major phyla of the monophyletic deuterostomes. The analysis shows an early separation into a medial hydrocoele and lateral coelomic mesoderm with an enteric channel between them before the hydrocoele forms the pentameral plan of five primary podia. The deuterostome body plan thus has a single axial or medial coelom and a pair of lateral coeloms, all surrounding an enteric channel, the gut channel. Applied to the phyla, the medial coelom is the hydrocoele in echinoderms, the notochord in chordates and the proboscis coelom in hemichordates: the lateral coeloms are the coelomic mesoderm in echinoderms, the paraxial mesoderm in chordates and the lateral coeloms in hemichordates. The plan fits frog and chick development and the echinoderm fossil record, and predicts genes involved in coelomogenesis as the source of deuterostome macroevolution

A History of Aboriginal Sydney…digitally delivering the past to the present

For more than two centuries, the history of the Indigenous people of the Sydney region has remained locked away in archives, held within families, or obliterated by the dominant culture. Now, with community approval and co-operation, our project, A history of Aboriginal Sydney, is beginning to use digital tools to restore Sydney's Aboriginal history in forms which can be appreciated and shared by the families themselves, by high school students and by everyone who values the history and culture of Australia's first peoples. Our project is based on the developing knowledge management platform, which integrates historical records, methods and tools of e-scholarship, and solutions for delivering research data for different uses. The project team employs methods such as marking of topic threads, and linking data with interactive timelines and digital maps to enable online learning and information discovery on the website . The project itself is based in the Department of History, University of Sydney and is funded by an Australia Research Council, Australian Professorial Fellowship and Discovery Grant. The research data are archived in ATSIDA (Aboriginal and Torres Strait Islander Data Archive), which provides long-term preservation and manages appropriate access to the data.ARC, ATSID

Improving quality of the child care environment through a consultancy programme for centre directors

This study examined the effects of a newly developed on-site consultancy programme to improve global quality of the child care environment in non-parental child care centres for 0- to 4-year-old children as measured with the ITERS-R/ECERS-R. Using a randomised controlled trial with a pretest, posttest, and follow-up test, we compared 35 experimental group with 33 control group. The consultancy programme comprised three consultations in total. Analysis on the items that were specifically targeted during the consultancy showed a significant improvement on these targeted items between pretest and posttest and between posttest and follow-up. The effect of the consultancy programme on the total scores (including the non-targeted items) was not significant

Tijd voor Kwaliteit in de Kinderopvang

*0ntbrkt

Waar blijft de tijd? Over ontwikkeling, "slow science" en snel studeren

Item does not contain fulltextFarewell adress RU, 26 februari 201424 p

Tijd voor kwaliteit in de kinderopvang

*0ntbrkt

Groepsfunctioneren in de kinderopvang, een conceptueel kader

Contains fulltext : 90425.pdf (publisher's version ) (Open Access)In Dutch child care it is generally assumed that group functioning influences children's wellbeing and development. Yet, a clear definition of the functioning of a child care group is lacking. This article describes a conceptual framework for child care group functioning based on Robert Hinde's model of social complexity (1987). Group functioning is defined as a relatively stable pattern of interactions between group members, associated with cognitions (expectations) and emotions, that develops over time as a function of internal (group) and external (contextual) influences. Each group has its own unique pattern, which may be described on two dimensions, namely group cohesion and emotional climate. Cohesion is the extent to which interactions within a group reflect togetherness and connectedness. It concerns the number and pattern of dyadic interactions (network structure), the extent to which the behaviour of individual group members is mutually coordinated (joint action) and the degree of positive involvement between group members. The emotional climate concerns the positive versus negative tone of the emotions expressed in the group. Although little is known about group functioning in the child care setting, it is plausible that it influences children's socio-emotional and cognitive development. Therefore group functioning can be seen as a relevant part of child care quality. Additional empirical research is needed to acquire more knowledge about group functioning in child care.18 p

Pedagogische kwaliteit in de kinderopvang: doelstellingen en kwaliteitscriteria

Item does not contain fulltex