Minerva Elements (Restricted Access: Repository Staff Only)
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ItemCommunity bike workshops and bicycle repair: the global picture(Koochemag.ir, 2023-10-04)There is a global movement to “close the circle” of citizen bicycle use and repair, in community bicycle workshops. They are spaces where people repair their own bikes, or help others, also recycling parts and components. In the process, enthusiasm for cycling is increased, friendships flourish, and in a small way, urban automobility is challenged.
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ItemDeveloping teachers’ spatial competency: Professional learning in a Singapore context.( 2023-10-04)RationaleSignificant investment in school infrastructure needs to be accompanied with effective professional learning and development of teachers to develop their spatial competency. These spatialised professional learning practices are critical for teachers to understand and use the affordances of flexible and agile design features that are increasingly being used in schools all over the world. Research has shown that this is a significant gap as schools and school systems focus on the school built without due consideration to the professional learning needs of teachers. AimThe collaborative project between the Faculty of Education at the University of Melbourne and the National Institute of Education at Nanyang Technological University investigated the impact of a spatialised professional learning pilot program in one secondary school in Singapore. MethodThis study draws on an in-depth case study approach of the pedagogical and spatial practices of three teachers. Using quantitative and qualitative data from teacher and student surveys, observations and semi-structured interviews, this report provides critical perspectives on the impact of the professional learning program on their teaching practice, efficacy and mind frames.ResultsIn summary, the professional learning program helped teachers become more aware of how the physical space can shape the learning experiences of students. However, they also noted challenges, such as a lack of suitable classrooms and furniture, class size, and heavy curriculum, which restricts them from using the affordances of the physical space as part of their pedagogical practice. ImplicationsThe report concludes by discussing three practical implications for future practice: (1) the importance of providing a range of diverse furniture options in flexible and agile learning environments, (2) the inclusion of teacher and student voice in the design of learning spaces, and (3) the significance of future-focused spatialised professional learning and development practices. These provocations for future practice, while pertinent to the Singaporean context, can also be read with broader relevance to other educational systems and schools.
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ItemLife after Ayahuasca: A Qualitative Analysis of the Psychedelic Integration Experiences of 1630 Ayahuasca Drinkers from a Global Survey(MDPI AG, )Ayahuasca is an Amazonian psychoactive plant medicine being explored for its potential therapeutic uses in Western contexts. Preliminary studies link ayahuasca use with improvements across a range of mental health indicators, but studies have not yet explored qualitative aspects of the post-treatment process known in the psychedelic literature as “integration”. This includes how participants make sense of their ayahuasca experiences and minimise harm/maximise benefits after ayahuasca use. A global online survey, conducted between 2017 and 2019, collected responses from 1630 ayahuasca drinkers (50.4% male, mean age = 43 years) to an open-ended question about their integration experiences after consuming ayahuasca. Inductive codebook thematic analysis was used to identify themes in participants’ integration experiences. Participants described integration experiences in three main ways. First, was an overall appraisal of the integration experience (e.g., as easy, challenging, or long-term/ongoing). Second, was describing beneficial tools which facilitated integration (e.g., connecting with a like-minded community and ongoing practice of yoga, meditation, journaling, etc.). Third, was describing integration challenges (e.g., feeling disconnected, going back to “old life” with new understandings, etc.). These findings suggest that integrating ayahuasca experiences can be challenging and take considerable time, though working through integration challenges may facilitate positive growth. Findings also challenge the role of individual psychotherapy as the primary integration tool in Western psychedelic therapy, suggesting that communal and somatic elements may also be useful. An expanded definition of psychedelic integration is proposed which includes working with integration challenges and adjusting to life changes.
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ItemNo Preview AvailableExamining plurilingual repertoires(Routledge, 2023-08-04)
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ItemEnabling productivity goals through construction 4.0 skills: Theories, debates, definitions(Elsevier BV, 2023-09)
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ItemMuddying the Waters: Complicating Narratives through Global Architectural History(University of California Press, 2023)Architectural history’s global turn has received widespread scholarly attention. However, what we mean by “global architectural history” remains an open question. The map is not the territory, and just as the plan is not the building, architectural history can offer only an approximation of the ways we build. Global architectural history has the potential to remind us of this fact, demonstrating how the people and buildings we study were shaped by global networks and flows; how the stories we tell about a place are often part of larger narratives of movement; how the work we do identifies only certain threads. In muddying the waters, global architectural history offers the promise of fertile soil in which new things can grow.
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ItemExperimental investigation of boundary layer transition in flow past a bluff body(IOP PUBLISHING LTD, 2017-01-01)We explore the phenomenon of drag crisis observed for the flow over bluff bodies at high Reynolds numbers. The drag coefficient reduces significantly beyond a certain Re due to the transition of the boundary layer from laminar to turbulent state. Flow past a smooth sphere and a circular cylinder is experimentally investigated for 1.0 × 105 ≤ Re ≤ 5.0 × 105 via unsteady force, surface-pressure and 2-D Particle Image Velocimetry(PIV) measurements. In case of a smooth sphere, the drag crisis is observed for Re > 3.3 × 105. The unsteady force measurements reveal that the fluctuations in the force coefficients initially increase with Re in the high subcritical regime and then experience a steep fall in the critical regime. It is found from the PIV measurements that the normal Reynolds stresses in the separated shear layer from the sphere are one order lower in magnitude for the supercritical regime in comparison to the subcritical regime. In the case of flow past a smooth circular cylinder, a two-stage drag crisis is captured using surface-pressure measurements where the boundary layer over one side of the cylinder undergoes transition around Re = 3.9 × 105 and that over the second side transitions around Re = 4.8 × 105. The transition is accompanied with increased fluctuations in the surface-pressure coefficients near the shoulders of the cylinder.
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ItemOn the relationship between manipulated inter-scale phase and energy-efficient turbulent drag reduction(Cambridge University Press (CUP), 2023-10-10)We investigate the role of inter-scale interactions in the high-Reynolds-number skin-friction drag reduction strategy reported by Marusic et al. (Nat. Commun., vol. 12, 2021). The strategy involves imposing relatively low-frequency streamwise travelling waves of spanwise velocity at the wall to actuate the drag generating outer scales. This approach has proven to be more energy efficient than the conventional method of directly targeting the drag producing inner scales, which typically requires actuation at higher frequencies. Notably, it is observed that actuating the outer scales at low frequencies leads to a substantial attenuation of the major drag producing inner scales, suggesting that the actuations affect the nonlinear inner–outer coupling inherently existing in wall-bounded flows. In the present study, we find that increased drag reduction, through imposition of spanwise wall oscillations, is always associated with an increased coupling between the inner and outer scales. This enhanced coupling emerges through manipulation of the phase relationships between these triadically linked scales, with the actuation forcing the entire range of energy-containing scales, from the inner (viscous) to the outer (inertial) scales, to be more in phase. We also find that a similar enhancement of this nonlinear coupling, via manipulation of the inter-scale phase relationships, occurs with increasing Reynolds number for canonical turbulent boundary layers. This indicates improved efficacy of the energy-efficient drag reduction strategy at very high Reynolds numbers, where the energised outer scales are known to more strongly superimpose and modulate the inner scales. Leveraging the inter-scale interactions, therefore, offers a plausible mechanism for achieving energy-efficient drag reduction at high Reynolds numbers.
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ItemCrowdshipping for sustainable urban logistics: A systematic review of the literature(Elsevier BV, 2023-10)
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