City University London

About: City University London is a education organization based out in London, United Kingdom. It is known for research contribution in the topics: Population & Context (language use). The organization has 5735 authors who have published 17285 publications receiving 453290 citations.

Psychological distress after stroke and aphasia: the first six months

Abstract: Objective: We explored the factors that predicted psychological distress in the first six months post stroke in a sample including people with aphasia.Design: Prospective longitudinal observational study.Setting and subjects: Participants with a first stroke from two acute stroke units were assessed while still in hospital (baseline) and at three and six months post stroke.Main measures: Distress was assessed with the General Health Questionnaire-12. Other measures included: NIH Stroke Scale, Barthel Index, Frenchay Aphasia Screening Test, Frenchay Activities Index, MOS Social Support Scale and social network indicators. Logistic regression was used to identify predictors of distress at each stage post stroke; and to determine what baseline factors predicted distress at six months.Results: Eighty-seven participants were able to self-report on measures used, of whom 32 (37%) had aphasia. 71 (82%) were seen at six months, including 11 (16%) with aphasia. Predictors of distress were: stroke severity at basel...

Visualisation of Origins, Destinations and Flows with OD Maps

Abstract: We present a new technique for the visual exploration of origins (O) and destinations (D) arranged in geographic space. Previous attempts to map the flows between origins and destinations have suffered from problems of occlusion usually requiring some form of generalisation, such as aggregation or flow density estimation before they can be visualized. This can lead to loss of detail or the introduction of arbitrary artefacts in the visual representation. Here, we propose mapping OD vectors as cells rather than lines, comparable with the process of constructing OD matrices, but unlike the OD matrix, we preserve the spatial layout of all origin and destination locations by constructing a gridded two-level spatial treemap. The result is a set of spatially ordered small multiples upon which any arbitrary geographic data may be projected. Using a hash grid spatial data structure, we explore the characteristics of the technique through a software prototype that allows interactive query and visua...

Research-derived web design guidelines for older people

Abstract: This paper presents the development of a set of research-derived ageing-centred Web design guidelines. An initial set of guidelines was first developed through an extensive review of the HCI and ageing literature and through employing a series of classification methods (card sorting and affinity diagrams) were employed as a means for obtaining a revised and more robust set of guidelines. A group of older Web users were then involved in evaluating the usefulness of the guidelines. To provide evaluation context for these users, two websites targeted to older people were used. This study makes several contributions to the field. First, it is perhaps the first manuscript that proposes ageing-friendly guidelines that are for most part backed by published studies. Second, the guidelines proposed in this study have been thoroughly examined through a series of expert and user verifications, which should give users of these guidelines confidence of their validity.

R&D, internationalization and growth of newly listed firms: European evidence

Abstract: The initial public offering (IPO) is an important stage in the life cycle of privately held and entrepreneurial firms. For innovative firms eager to capitalize on their technological advances, an IPO represents a springboard for a rapid international expansion of sales. However, there is little research on the longer-term, post-IPO strategic evolution of newly listed companies, including their internationalization. We build on international entrepreneurship and dynamic capabilities perspectives and examine interrelationships between R&D, exporting and growth of newly listed firms in the UK, Germany, Italy and France. Using panel data for 1110 IPOs during the period 1985–2004, we found that R&D intensity is an important antecedent factor for internationalization of sales. Both R&D and export intensities have a positive effect on the sales growth of newly listed firms. However, R&D intensity is path dependent, and is determined by levels of accumulated intangible assets and debt. In terms of time dynamics, the growth of IPO firms is at its highest level just after the float, whereas export intensity increases as IPO firms mature. We conclude that managers and IPO investors need to take into account not only growth opportunities but also past innovation strategies and financial constraints on managers' strategic choices.