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Similar Dynamics (similar + dynamics)
Selected AbstractsUltrafast Energy Transfer from Bound Tetra(4- N,N,N,N -trimethylanilinium)porphyrin to Synthetic Dopa and Cysteinyldopa Melanins,PHOTOCHEMISTRY & PHOTOBIOLOGY, Issue 1 2003Tong Ye ABSTRACT The binding of tetra(4- N,N,N,N -trimethylanilinium)porphyrin (TAP) to melanins quenches the porphyrin emission. Time-resolved femtosecond absorption spectroscopy reveals that the mechanism behind this quenching is ultrafast nonradiative energy transfer (,ET < 100 fs) from electronically excited TAP to melanin. Similar dynamics are observed for both dopa and cysteinyldopa melanins. Steady-state emission studies demonstrate that the emission from melanin increases upon excitation of bound TAP, thereby confirming that rapid energy transfer occurs. These results are consistent with previous photoacoustic studies, which revealed that the TAP,melanin complex behaves like a supermolecular system liberating heat as a whole. [source] Heteromyopia and the spatial coexistence of similar competitorsECOLOGY LETTERS, Issue 1 2003David J. Murrell Abstract Most spatial models of competing species assume symmetries in the spatial scales of dispersal and interactions. This makes analysis tractable, and has led to the conclusion that segregation of species in space does not promote coexistence. However, these symmetries leave parts of the parameter space uninvestigated. Using a moment-approximation method, we present a spatial version of the Lotka,Volterra competition equations to investigate effects of removing symmetries in the distances over which individuals disperse and interact. Some spatial segregation of the species always comes about due to competition, and such segregation does not necessarily lead to coexistence. But, if interspecific competition occurs over shorter distances than intraspecific competition (heteromyopia), spatial segregation becomes strong enough to promote coexistence. Such coexistence is most likely when the species have similar dynamics, in contrast to the competition,colonization trade-off that requires large competitive differences between species. [source] An anxious profession in an age of fearJOURNAL OF PSYCHIATRIC & MENTAL HEALTH NURSING, Issue 4 2006R. LAKEMAN dipcpnsg bn ba hons pgdip (psychotherapy) fanzcmhn mhn (credentialed) This paper proposes that some practices and trends in mental health care may be considered as defensive responses to collective anxiety and fear. On a larger scale similar dynamics occur around fear of terrorism. Collectively and individually we are pulled by the defensive forces and dynamics associated with anxiety. This can in part explain the polarization that occurs around issues of definition and response to mental illness. Fear and anxiety push services towards simplistic viewpoints and futile practices. The capacity to view things from the perspective of others, embracing explanatory and therapeutic pluralism and adopting a humble attitude, may be helpful in enabling anxiety to be channelled productively. [source] Danger,early maladaptive schemas at work!: the role of early maladaptive schemas in career choice and the development of occupational stress in health workersCLINICAL PSYCHOLOGY AND PSYCHOTHERAPY (AN INTERNATIONAL JOURNAL OF THEORY & PRACTICE), Issue 2 2008Martin Bamber The schema-focused model of occupational stress and work dysfunctions (Bamber & Price, 2006; Bamber, 2006) hypothesizes that individuals with EMS (unconsciously) gravitate toward occupations with similar dynamics and structures to the toxic early environments and relationships that created them. They subsequently re-enact these EMS and their associated maladaptive coping styles in the workplace. For most individuals, this results in ,schema healing', but for some individuals with more rigid and severe EMS, schema healing is not achieved and the structures and relationships of the workplace, together with the utilization of maladaptive coping styles, serve to perpetuate their EMS. The model hypothesizes that it is these individuals who are most vulnerable to developing occupational stress syndromes To date, this model has been subjected to very little empirical investigation, so the main aim of this study was to address this gap in the literature by testing out some of its main assumptions and to provide empirical data, which would either support or reject the model using a population of health workers. Specifically, it was hypothesized that ,occupation-specific' EMS would be found in health workers from a range of different healthcare professions. It was also hypothesized that the presence of higher levels of EMS would be predictive of raised levels of occupational stress, psychiatric caseness and increased sickness absence in those individuals. A cross-sectional study design was employed and a total of 249 staff working within a NHS Trust, belonging to one of five occupational groups (medical doctors, nurses, clinical psychologists, IT staff and managers), participated in the study. All participants completed the Young Schema Questionnaire-Short Form (Young, 1998); the Maslach Burnout Inventory-Human Services Form (Maslach & Jackson, 1981), and the General Health Questionnaire-28-item version (Goldberg, 1978). A demographic questionnaire and sickness absence data was also collected. The results of a between groups analysis of variance and further post hoc statistical analyses identified a number of occupation specific EMS. Also, the results of a series of multiple linear regression analyses indicated the presence of some EMS to be predictive of higher levels of burnout, psychiatric caseness and sickness absence in health workers. In conclusion, the findings of this study provide empirical support for the schema-focused model of occupational stress and work dysfunctions (Bamber & Price, 2006; Bamber, 2006), and it appears that the existence of underlying EMS may constitute a predisposing vulnerability factor to developing occupational stress.,Copyright © 2008 John Wiley & Sons, Ltd. [source] | ||||||||||