18 research outputs found
Evolution of Rogue Waves in Interacting Wave Systems
Large amplitude water waves on deep water has long been known in the sea
faring community, and the cause of great concern for, e.g., oil platform
constructions. The concept of such freak waves is nowadays, thanks to satellite
and radar measurements, well established within the scientific community. There
are a number of important models and approaches for the theoretical description
of such waves. By analyzing the scaling behavior of freak wave formation in a
model of two interacting waves, described by two coupled nonlinear Schroedinger
equations, we show that there are two different dynamical scaling behaviors
above and below a critical angle theta_c of the direction of the interacting
waves below theta_c all wave systems evolve and display statistics similar to a
wave system of non-interacting waves. The results equally apply to other
systems described by the nonlinear Schroedinger equations, and should be of
interest when designing optical wave guides.Comment: 5 pages, 2 figures, to appear in Europhysics Letter
Talking about my experiences ... at times disturbing yet positive': Producing narratives with people living with dementia
Background: This research investigated narrative production and use with families living with dementia. We hypothesised that the process of narrative production would be beneficial to people with dementia and carers, and would elicit important learning for health and social care professionals. Method: Through third sector partners, we recruited community-dwelling people with dementia and carers who consented to develop written, audiotaped or videotaped narratives. Audio-taped narratives were transcribed verbatim and handwritten narratives word-processed. After checking by participants, completed narratives were analysed thematically using qualitative data analysis computer software. A summary of the analysis was circulated to participants, inviting feedback: the analysis was then reviewed. A feedback questionnaire was subsequently circulated to participants, and responses were analysed thematically. Results: Twenty-one carers and 20 people with dementia participated in the project. Four themes of support were identified: ârelationshipsâ, âservicesâ, âprior experience of copingâ and having an âexplanation for the dementiaâ. Three themes were identified as possible additional stresses: âemotionsâ, âphysical healthâ and âidentityâ. We suggest a model incorporating all these themes, which appeared to contribute to three further themes; âexperience of dementiaâ, âapproaches to copingâ and âlooking to the futureâ. In participant feedback, the main themes identified were âemotionsâ, âputting things in perspectiveâ, âsharing or not sharing the narrativeâ and âactions resultingâ. Conclusions: Producing a narrative is a valuable and engaging experience for people with dementia and carers, and is likely to contribute to the quality of dementia care.Further research is needed to establish how narrative production could be incorporated into routine practice