Thermal comfort is determined by the combined effect of the six thermal comfort parameters: temperature, air moisture content, thermal radiation, air relative velocity, personal activity and clothing level as formulated by Fanger through his double heat balance equations. In conventional air conditioning systems, air temperature is the parameter that is normally controlled whilst others are assumed to have values within the specified ranges at the design stage. In Fanger’s double heat balance equation, thermal radiation factor appears as the mean radiant temperature (MRT), however, its impact on thermal comfort is often ignored. This paper discusses the impacts of the thermal radiation field which takes the forms of mean radiant temperature and radiation asymmetry on thermal comfort, building energy consumption and air-conditioning control. Several conditions and applications in which the effects of mean radiant temperature and radiation asymmetry cannot be ignored are discussed. Several misinterpretations that arise from the formula relating mean radiant temperature and the operative temperature are highlighted, coupled with a discussion on the lack of reliable and affordable devices that measure this parameter. The usefulness of the concept of the operative temperature as a measure of combined effect of mean radiant and air temperatures on occupant’s thermal comfort is critically questioned, especially in relation to the control strategy based on this derived parameter. Examples of systems which deliver comfort using thermal radiation are presented. Finally, the paper presents various options that need to be considered in the efforts to mitigate the impacts of the thermal radiant field on the occupants’ thermal comfort and building energy consumption.
This study used a trait-state-occasion (TSO) model to isolate stable trait variance, occasion-specific state variance, and shared method related variance in a measure for leisure satisfaction in a Dutch nationally representative nine-year panel study. Findings indicate that satisfaction with leisure time is a consistently stronger indicator of overall leisure satisfaction than satisfaction with leisure activities. About half of the variance in leisure satisfaction is stable trait variance, with the remaining variance being mostly occasion-specific and to a lesser extent attributable to shared method variance and error. However, these findings depend on the age group we consider.Several socio-demographic variables relate directly to the trait aspect of leisure satisfaction. Our study underscores the importance of recognizing that over time leisure satisfaction measurements have considerable stable and more volatile elements and that one should control for shared method effects.
Background The experiences of residents who have communication difficulties such as dysphasia are largely absent from the literature. Aim To illuminate the everyday experiences of four residents with severe communication difficulties living in a residential care setting in the Netherlands. Methodology & Methods A collective case study methodology was used. Seventy-five hours of observation, interview and documentary data was gathered over six weeks. Alternative strategies of communication were developed to enable the co-creation of dialogue between participants and researcher. For example, a participant who could not talk used intentionally created artwork to share her ideas with the researcher. Findings Participants' daily experiences were characterised by struggling against the constraints of the residential setting: having to wait, having unmet needs, experiencing vulnerability and uncertainty. Participants' communication difficulties exacerbated these constraints. Their experiences of struggling were sometimes ameliorated by significant social contact with family or particular staff members, and engaging in enjoyable activities. Occasionally the experiences of enjoying the here-and-now, and being 'seen' as a person by the other, would create beautiful moments in which truly person centred engagement would occur. These moments were neither articulated nor recorded, and were thus invisible after they had occurred. Similarly, the experiences of struggling against the constraints were neither acknowledged nor recorded. Significant experiences in the lives of these four residents were therefore invisible to others. The unifying theme representing the participants' daily experiences was: That which goes unsaid. Discussion It was necessary to develop communication strategies which would by-pass the researcher's assumptions and enable participants to introduce their own ideas and opinions. This ongoing process of co-creation of dialogue required work from, and trust between, participants and researcher. What is new? Expressly seeking the views of residents with communication difficulties Successfully using process consent with participants in this situation Using intentionally created artwork during data gathering in this context What has regional, national or international relevance? The findings indicate that people with communication difficulties may not receive optimal care in residential settings in the Netherlands. Methods are described which could be used by practitioners in their everyday work, and which show facilitators or practice developers how they can help carers to engage in more effective communication with this kind of resident. Additionally, this research contributes to the international discussion about ethical participation of vulnerable people in research.
