What are the affordances of information and communication technologies?

The paper examines the notion that Information and Communication Technologies (ICT) have affordances that epitomize the features of our late modern age (Giddens, 1991) and explores whether these affordances (Salomon, 1993, p. 51) can be used to facilitate particular approaches to educational practice. It argues that a clear articulation of these affordances would enable us to understand how these technologies can be most effectively used to support learning and teaching. We believe that any one affordance can be considered to have both positive and negative connotations and the paper draws on social and educational theory to provide an initial taxonomy of these affordances

Hollow vortices and minimal surfaces

We consider an overdetermined elliptic problem known as the hollow vortex problem. We prove that the solutions to this problem are in 1:1 correspondence with minimal graphs bounded by horizontal symmetry lines. We use this correspondence to give various examples of domains with hollow vortices.Comment: 22 pages, 7 figure

「物性研究」10周年記念特集

この論文は国立情報学研究所の電子図書館事業により電子化されました

The influence of the school on the decision to participate in learning post 16

The paper reports on work in progress for a Department for Education and Skills (DfES) funded research project on “The Influence of the School in the Decision to Participate in Learning Post-16”. The primary aim of the project is to identify the nature and influence of school-based factors in the choices of young people about their post-16 education, training and career pathways. Twenty-four schools were selected to represent schools with rising attainment. The sampling frame included schools both with and without sixth forms, in nine Metropolitan, Urban Unitary, and Shire County Local Education Authorities (LEAs)in Engaland. A profile of schools whose ‘catchment’ areas represented different social and economic status was created using data on the number of pupils receiving free schools meals. Schools with and schools without rising levels of participation post-16 were also included in the sample. Pupils from Year 11 and Year 10 were interviewed in single sex focus groups providing a total of 48 pupils in each school. Each pupil interviewed completed a questionnaire. Year 11 pupils will also take part in follow up interviews planned for Autumn 2003 when they have left compulsory education. Semi-structured interviews were also carried out with head teachers, senior careers teachers and Year 11 tutors, LEA and local Connexions service representatives. The study also analysed secondary data relating to each school to build a profile for the schools in terms of its social and economic context, ethos and organisation. The secondary data included; inspection reports, DfeS and LEA published data for each school as well as school produced promotional material. The study identified the attitudes and preferences of the pupils, their teachers and advisors towards post-16 education and training. The factors that influenced the pupils’, the teachers’ and advisors’ attitudes and preferences were identified and compared to those factors considered in previous research. The DfES commissioned the study to look specifically at the influence of the school rather than factors beyond the school, and aimed at contributing an understanding of the impact of schooling, thereby informing the policy development for widening participation post-16. In addition to the investigation of school based factors that influence the choices young people make about post- 16 learning the study had two other aims: To identify implications for the development of careers education and guidance and decision making awareness amongst pupils in schools. To enhance further the modelling of pupil decision-making in education and training markets, and in the labour markets. This paper considers some of the preliminary findings of the research, carried out in 2003

The application of the law of virtual work in the solution of civil engineering structures

The purpose of this thesis is to explore the civil engineering application of the law of virtual work to the determination of defelections, shears, bending stresses in truss structures, beams, structures subjected to both direct stress and bending, and indeterminate structures, and further to give examples of their mathematical solutions

Impaired neutrophil directional chemotactic accuracy in chronic periodontitis patients

Aim: To investigate the chemotactic accuracy of peripheral blood neutrophils from patients with chronic periodontitis compared with matched healthy controls, before and after non-surgical periodontal therapy. Material & Methods: Neutrophils were isolated from patients and controls (n = 18) by density centrifugation. Using the Insall chamber and video microscopy, neutrophils were analysed for directional chemotaxis towards N-formyl-methionyl-leucyl-phenylalanine [fMLP (10 nM), or CXCL8 (200 ng/ml)]. Circular statistics were utilized for the analysis of cell movement. Results: Prior to treatment, neutrophils from patients with chronic periodontitis had significantly reduced speed, velocity and chemotactic accuracy compared to healthy controls for both chemoattractants. Following periodontal treatment, patient neutrophils continued to display reduced speed in response to both chemoattractants. However, velocity and accuracy were normalized for the weak chemoattractant CXCL8 while they remained significantly reduced for fMLP. Conclusions: Chronic periodontitis is associated with reduced neutrophil chemotaxis, and this is only partially restored by successful treatment. Dysfunctional neutrophil chemotaxis may predispose patients with periodontitis to their disease by increasing tissue transit times, thus exacerbating neutrophil-mediated collateral host tissue damage

Leadership, diversity and decision making

This working paper reports on leadership decision making in the UK Further Education (FE) sector drawing on the Integrating Diversity in Leadership project funded by the Centre for Excellence in Leadership (CEL). The project was undertaken by a team from the University of Southampton and Oxford Brookes University. The Full Report is available at: http://www.lums.lancs.ac.uk/leadership/cel/ The focus on leadership decision making arises from a conviction that increasing staff and student diversity in the sector brings unprecedented challenges and implications for leading and managing learning, learners and the learning community (Lumby with Coleman, 2007). Among the wide ranging challenges is that of enabling groups and teams to deliver ‘quality decisions’ (Hoffberg and Korver, 2006:2). The paper investigates the extent to which the increasing diversity in colleges impacts on the decision making capacity of leadership teams and groups within the sector. Our focus on this aspect of decision making is based on three key assumptions

Teasing apart retrieval and encoding interference in the processing of anaphors

Two classes of account have been proposed to explain the memory processes subserving the processing of reflexive-antecedent dependencies. Structure-based accounts assume that the retrieval of the antecedent is guided by syntactic tree-configurational information without considering other kinds of information such as gender marking in the case of English reflexives. By contrast, unconstrained cue-based retrieval assumes that all available information is used for retrieving the antecedent. Similarity-based interference effects from structurally illicit distractors which match a non-structural retrieval cue have been interpreted as evidence favoring the unconstrained cue-based retrieval account since cue-based retrieval interference from structurally illicit distractors is incompatible with the structure-based account. However, it has been argued that the observed effects do not necessarily reflect interference occurring at the moment of retrieval but might equally well be accounted for by interference occurring already at the stage of encoding or maintaining the antecedent in memory, in which case they cannot be taken as evidence against the structure-based account. We present three experiments (self-paced reading and eye-tracking) on German reflexives and Swedish reflexive and pronominal possessives in which we pit the predictions of encoding interference and cue-based retrieval interference against each other. We could not find any indication that encoding interference affects the processing ease of the reflexive-antecedent dependency formation. Thus, there is no evidence that encoding interference might be the explanation for the interference effects observed in previous work. We therefore conclude that invoking encoding interference may not be a plausible way to reconcile interference effects with a structure-based account of reflexive processing

Does early physical therapy intervention reduce opioid burden and improve functionality in the management of chronic lower back pain?

Introduction: Chronic lower back pain is a leading cause of disability in US adults. Opioid use continues to be controversial despite the Centers for Disease Control and Prevention guidance on chronic pain management to use nonpharmacologic and nonopioid pharmacologic interventions. The objectives of the study were to assess the impact of early physical therapy (PT) intervention on improving functionality and reducing opioid burden in patients with chronic lower back pain. Methods: A single-center, retrospective chart review of patients receiving ≥6 PT visits and treated with either opioids first (OF) or PT first (PTF) therapy for chronic lower back pain were evaluated. Concomitant use of nonopioid and nonpharmacologic therapy was permitted. The Oswestry Disability Index (ODI), a survey measuring functionality, was recorded for PTF group. Pain scores and medication use including opioids were collected at treatment initiation and completion. Results: One hundred and eighty patients were included in three groups: OF group (n = 60), PTF group (n = 60), and PTF + ODI group (n = 60). The PTF + ODI group had mean ODI reduction of 11.9% ( Discussion: Early PT resulted in improved functionality, decreased pain, and reduced medication use upon PT completion. These findings suggest PT, along with nonopioid modalities, are a viable first-line option for the management of chronic lower back pain