Science Collected Works - Research Publications
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ItemElectric field enhancement in Au and Ag nanodisks-based photonic crystals: Relevant design insights for efficient SERS substrates(Elsevier, 2023-07)In recent years, noble metal nanoparticle-based periodic nanoarrays (photonic crystals) have received special attention due to their gross potential to achieve exceptionally high Electric-Near Field Enhancement (ENFE) factors for visible light and their prospects as candidates for the fabrication of ultra-sensitive Surface-Enhanced Raman Spectroscopy (SERS) substrates. In this work, we report a simple but exhaustive theoretical analysis of the ENFE in Au and Ag nanodisks-based photonic crystals by Finite-Difference Time-Domain (FDTD) method. Nanostructures with arrays periodicities from 200 to 1000 [nm], nanodisks diameters from 100 to 500 [nm] and thicknesses from 20 to 200 [nm] were studied. Results show that the ENFE is strongly dependent on each one of these geometrical parameters, observing |E/E0|2 factors that can reach up to 1200 for the visible light spectrum. The effects of nanodisks surface curvature-based defects on the ENFE were also analyzed. This kind of defects seem to be also relevant to maximize the ENFE effects, observing that higher surface curvatures tend to considerably attenuate the electric field amplification. Our research provides relevant insights on the design optimization of this kind of photonic crystals to maximize the ENFE effects, which is a critical issue to assess the future fabrication conditions of efficient SERS substrates.
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ItemResounding relations: Habits of improvisation in Yolŋu song and contemporary Australian jazz(Taylor and Francis Group, 2024)Habit has primarily been considered along seemingly divergent trajectories, either as a mechanism that limits creativity or as a transition of imagination into embodied activity (Grosz 2013). An interplay of these two aspects is clearly seen in music improvisation, in which performances unfold through well-honed patterns of technique and processes of listening and learning. Yet while the development of good habits is considered essential to performance within distinct cultural traditions or stylistic genres, little attention has been devoted to identifying the types of habits needed for engagement in cross-cultural performance settings. This paper broadens the scope of habits typically explored within jazz studies and music pedagogy, conceptualising habit in a way that resonates across contemporary Australian jazz and Yolŋu manikay (public ceremonial song) from Australia’s Northern Territory. In this, we emphasize the relational dimensions of habit as they form a foundation for community formation through performance, involving processes of imitation and evocation, and learning through participation. Through this heuristic braiding of habits in jazz and manikay, we argue that habits of musical performance both locate performers within distinct traditions while allowing freedom to innovate. This dynamic allows for the elevation of these traditions within new contexts and relationships.
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ItemDislocation, Resilience and Change: Three Openings on Togetherness within Australian Music-making(Taylor and Francis Group, 2024)Realities of human dislocation present significant challenges to understandings of social togetherness. As such, a contemporary focus on inherited inequalities, discrimination and exclusion seems at odds with an enthusiasm for what might be held in common. In this article, we seek to reframe experiences of dislocation through three perspectives drawn from Australian music-making. While identifying challenges of inclusion and engagement within Australian history and society, we affirm the possibility for resilient and respectful relationships to be built across diverse experiences. Observations build from research on disability culture (Skinner), Indigenous engagement with western instruments (Case) and cross-cultural collaboration (Curkpatrick). Where Charles Taylor has defined social imaginaries as ‘common understanding which makes possible common practices’ (2007: 172), these perspectives show how human creativity is enabled by shared experiences and our basic materiality as proximate, relational individuals. Unique scenes of music performance are described as they shape new ways of relating and being within diverse communities, as a generative force for social change.
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ItemThe Wind is Always Blowing: Generative Crosscurrents of Ethnographic Dialogue in Australia(Wiley, 2024)Live conversations and writing play an important role in ethnographic research that seeks to develop understanding across cultural differences. Both forms of communication need not remain distinct: written dialogue can develop critical thought while foregrounding the shared contexts and relational impetuses of communication across cultures. Set against the background of recent styles in ethnographic writing about and with Yolŋu people, this article extends from conversations about wata (wind), exploring collaborative practices (music performance and teaching) and approaches to writing ethnography that respond to a core quality of wind as a medium that connects. Wata is a significant theme within manikay (public ceremonial song) that connects Wägilak with their ancestral lands, even as it blows through the country of other groups, allowing new relationships and understandings to be formed. Giving rise to concerns of connection, difference, and movement, wata is a significant theme for considering the ways narrative traditions can shape relationality and give impetus to intellectual inquiry.
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ItemWho is Country? A Hermeneutic Strategy Toward Philosophical Responsiveness in Australia(Open Humanities Press, 2023)Within Australian society, the term ‘Country’ is used to acknowledge prior and ongoing Indigenous Australian connections to specific lands, waters, and skies, challenging any supposed neutrality of public, cultural, or institutional spaces. However, use of the term ‘Country’ might also slide into unreflective abstraction when disconnected from the nourishing interactions of particular people and places that the term in its fullness can embody. In this paper, we seek to dispel conjectural mists that can surround the notion of ‘Country’ in popular societal use by attending to various relational dynamics which configure and substantiate its meaning. Engaging with Warlpiri (Aboriginal Australian) epistemology and the pedagogic strategies of Warlpiri scholar and co-author, Wanta Jampijinpa Pawu, we propose the seemingly odd question, who is country? as a hermeneutic strategy—an approach which embraces a grounded ontology that ‘lowercases’ meaning as essentially relational and figured within shared identities. We indicate similar tonalities in the contextual hermeneutics of prominent Indigenous Australian theologians, who challenge latent abstractions of theism lurking within pronouncements of meaning as disembodied from real contexts of people and place.
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ItemNo Preview AvailableSperm Syringe: 3D Sorting Platform for Assisted Reproduction (Adv. Mater. Technol. 9/2022)(Wiley, 2022-09)In article number 2101291, Reza Nosrati and co-workers develop a scalable 3D sorting platform for one-step semen purification and high-quality sperm selection. The Sperm Syringe selects sperm with over 65% improvement in both DNA integrity and morphology, considerably outperforming the current best clinical practices for sperm selection in assisted reproduction.
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ItemAlteration of chlorite coats and sandstone porosity reduction: Insights from reactive transport modeling(Elsevier BV, 2024-02)Chlorite coats are widely recognized as a key element in preserving sandstone porosity because it can inhibit the growth of quartz cements. However, the alteration of chlorite coats and its potential influences on sandstone porosity are rarely discussed. Therefore, this work used reactive transport models under different petrographic and geochemical conditions to investigate the influence of chlorite coats on sandstone porosity in a major dissolution window (100 °C). The HCO3-rich (CO2-charged) and HCO3-depleted (organic acids-charged) waters were injected to induce mineral dissolution and precipitation. The results indicate that the alteration of chlorite coats may result in sandstone porosity reduction. The HCO3-rich water leads to a porosity decrease mainly through the precipitation of magnesite and siderite resulting from chlorite dissolution. In contrast, the HCO3-depleted water causes a porosity decrease mainly through the redistribution of kaolinite and quartz cements. Factors, including pCO2, organic acid concentration, coat coverage, coat thickness, and grain size, have secondary influences on net porosity change. In comparison, factors, including chlorite mineralogy, detrital lithology, and the reduction of K-feldspar dissolution rate caused by chlorite coat, have negligible influences. The alteration of chlorite coats may introduce significant mis-interpretation to the analysis of the relationship between chlorite coats and sedimentary facies. Moreover, the actual impact of pore-filling chlorite on porosity reduction may be either underestimated or overestimated. Therefore, the alteration of chlorite coats should be taken into consideration in future studies.
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ItemNo Preview AvailableBalancing-sequencing paced assembly lines: a multi-objective mixed-integer linear case study(TAYLOR & FRANCIS LTD, 2023-09-02)
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ItemNo Preview AvailableAn exact method to incorporate ergonomic risks in Assembly Line Balancing Problems(PERGAMON-ELSEVIER SCIENCE LTD, 2023-09)
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ItemMorphodynamics of an erodible channel under varying discharge(WILEY, 2021-09-30)Abstract Alluvial channels arise through the interaction between morphology, hydraulics, and sediment transport, known as the ‘fluvial trinity’. Over relatively short timescales where climate and geology are fixed but discharge and sediment supply may vary, this process facilitates adjustments towards steady state, where the system oscillates around a mean condition. The relationship between changes in conditions and geomorphic response may be highly complex and nonlinear, especially in systems with multiple modes of adjustment. This study examines the adjustment of an erodible channel with fixed banks and a widely graded sediment mixture to successive increases in discharge. With each increase in discharge, components of the fluvial trinity adjusted towards a steady state. Particularly at relatively low discharges, adjustments were controlled by intrinsic thresholds and highlighted important morphodynamic processes. Notably, there was a strong interplay between channel morphology and sediment transport, and an effect whereby larger‐than‐average grains controlled channel deformation. These two processes occurred at the bar scale and were highly spatialised, which has two important implications: (1) reach‐averaged representations of process provide only partial insight into morphodynamics; and (2) models of rivers that suppress these process feedbacks and size‐dependent transport may not replicate morphodynamics that typically occur in field conditions. The experiments provide quantitative evidence for conceptual models describing exponential approaches towards steady state and the potential for transiency if disturbance frequency exceeds the recovery time. They also highlight how in natural rivers, particularly those with greater degrees of freedom for adjustment (notably, lateral adjustment and meandering), continuous changes in discharge may lead to nonlinear rather than steady‐state behaviour. In these settings, more holistic analytical frameworks that embrace different aspects of the system are critical in understanding the direction, magnitude and timing of channel adjustments.