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The use of various types of filtering facepiece class 3 (FFP3) mask have become commonplace since the Covid-19 outbreak. These have been evaluated in terms of efficacy regarding aerosol filtration but less emphasis has been placed on the acoustic effects of such masks and their consequences for clinical communication. A microphone 65 cm from a sound-producing Head and Torso Simulator (wearing the masks) was used to measure attenuation via a tone sweep. Predicted impact on speech reception in noise was assessed by weighting the attenuations of cochlear excitation patterns by the frequency importance function of the Speech Intelligibility Index. We evaluated acoustic attenuation properties of seven FFP3 masks and a Type IIR surgical mask (as a comparator). The Type IIR mask had the smallest impact on SNR (2.6 dB with visor). Most FFP3s with an addition of a visor (if not already face covering) impacted SNR by approximately 6 dB. The 3 M 6000 was significantly worse (15.8 dB). Mouth-and-nose covering FFP3s masks had similar effects on SNR (≈6.2 dB with visor). The Tecmen TM-H2 had several advantages over other masks evaluated. It was reusable, allowed lipreading clues and the attenuation was similar to other FFP3s. [ABSTRACT FROM AUTHOR]

Purpose: This article reviews the experience of ICT applications as a tool for putting research derived knowledge into use for innovation in South Asia. Design/methodology/approach: The article uses the contemporary understanding of communication and innovation in reviewing the experience of ICTs in putting new knowledge into use in South Asia. Findings: The findings from this study suggest that ICTs in general have not contributed effectively to the challenge of putting new knowledge into use as they are mostly used to support traditional communication tasks--such as information dissemination and training. The article argues that this under-utilisation of the potential of ICTs could be due to: a lack of appreciation of the new communication-intermediation tasks required for innovation, underestimation of the roles of intermediaries and their capacities for innovation and lack of networks needed for communities to make use of the information provided through ICTs. Practical implications: Although the understanding of communication, innovation and extension has changed substantially in the past two decades, there is still a big gap between theory and practice. This article contends that this gap needs to be bridged if ICTs are to effectively contribute to putting new knowledge into use. Originality/value: The article manifests the necessity for ICT based initiatives to be embedded into the renewed understanding of communication and innovation and it moves ICT related debates from merely a success story to a pragmatic world of communication and innovation process. (Contains 1 table and 1 figure.)

This article examines the structure of topic movement within face-to-face postgraduate university seminar discussion forums through a conversation analytic approach. The analysis of 12 audio recordings of seminars showed that in spite of clear differences in the management style of sessions by seminar leaders there were important consistencies in their normative structure of participation. Previous research has shown that the turn-taking procedures used as a basic organisational feature of the talk have been seen to result in a regular change of topic within seminars. Although the research here supports these findings, the data showed that topic change was only one aspect of the topic negotiation process. The analysis in this article illustrates that topic negotiation was an ever-present feature of the talk and that, in addition to frequent "successful" changes of topic, there were also innumerable "unsuccessful" topical interjections. One prominent source of such failure was the presence of overlap in the seminar talk. In addition to being of value to educationalists wishing to understand educational processes, this analysis is viewed as having significant relevance for the development of alternative distributed media for hosting interactive seminars as it shows the implications of the interactional "affordances" of learning environments for the achievement of interactive talk. This article suggests, therefore, that research and development in this field would benefit from detailed studies of the affordances of these alternative hosting media.

Studies of sustainability transitions and transformational change are common in energy and transport sectors. However, there is limited research on how these transformational change processes play out in the natural resources sector, particularly in developing economies. This paper seeks to address this gap, with a case study of the community forestry system in Nepal that has, over the last four decades, reversed Himalayan land degradation and contributed to community livelihoods. The case illustrates comprehensive changes in forest management practices and governance over four decades. Central to this was a 'thinking movement' of development agencies, activists and researchers that opened up learning spaces and engage conflicting stakeholders in action-oriented dialogues. While transformation can never be pre-engineered, this study suggests that investment in strengthening locally engaged research capability could be a key way of catalyzing sustainability transitions, both as a continuous process of evolution and transformative shifts during the crisis and political opportunity. [ABSTRACT FROM AUTHOR]