134125 research outputs found
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Temperature-triggered switching of the photo-thermal catalysis mechanism on Pt/TiO2 for efficient hydrogen production
No full textCatalysts capable of actively switching between distinct reaction pathways represent a paradigm shift in chemical synthesis. Here, we demonstrate a Thermo-Gated Activation phenomenon, which can be achieved by thermally activated escape of hot electrons. We establish that the Pt/TiO2 catalyst interface is kinetically trapped in a deep metastable potential well at low temperatures, blocking a potent plasmon-driven pathway. Above a critical temperature of 170 °C, the interface collectively escapes this well by overcoming a macroscopic activation barrier, a direct manifestation of a cooperative phase transition at the catalyst interface driven by thermal fluctuations. This escape event constructs a new, highly entropic dynamic interface that unlocks the pathway for hot-electron injection, redirecting the reaction to a highly efficient decarbonylation route with a remarkable H2 rate of 3137 mol gPt−1 h−1. This work establishes a principle of Thermo-Gated Activation, which triggers a non-equilibrium charge transfer process as a novel blueprint for designing "smart" catalysts.No Full Tex
Vulnerability to appearance-based social media use and preoccupation: A model of young women's appearance values, depression, and self-esteem via uses and gratification
No full textTheory and research suggest that women's general affective and appearance-related vulnerabilities are precursors of social media use, with the associations mediated by gratifications sought from social media, such as affection-seeking. To test this, we examined whether the vulnerabilities of low self-esteem, depression, thin-ideal internalisation, appearance perfectionism and appearance-contingent self-worth had indirect associations with appearance-based social media use/preoccupation via social media gratifications of escape, socialising, and affection-seeking. Social media use/preoccupation included general appearance-related activity, self-presentation, and social comparison when online. Participants were 405 young women (Mage = 19.95, SD = 2.70) who completed surveys. In a path model, all vulnerabilities but depressive symptoms were related to more escape and/or socialising gratification and there were three small indirect associations with appearance-based social media use/preoccupation, two for self-esteem (via escape and socialising) and one for thin-ideal internalisation (via socialising). In addition, the three appearance-specific individual vulnerability factors were directly related to appearance-based social media use/preoccupation. Overall, appearance-related vulnerabilities had mostly direct relations with increased appearance-based social media use/preoccupation. In contrast, self-esteem had indirect associations with appearance-based social media use/preoccupation, which were sometimes counterintuitive, and depressive symptoms had little unique impact on gratifications or on appearance-based social media use/preoccupation once other vulnerabilities had been considered.No Full Tex
Thai parents’ perspectives on understanding and involvement in non-pharmacological neonatal pain management
No full textBackground While neonatal care units (NCUs) are essential for critical neonatal care, they expose neonates to frequent painful procedures. Despite the benefits of non-pharmacological pain management and family-centered care (FCC), Thai parents’ perspectives in alleviating their infants’ pain remain under-reported. Aim To explore Thai parents’ perspectives regarding their understanding of and involvement in non-pharmacological pain management strategies. Methods A qualitative descriptive study was conducted using face-to-face, semi-structured interviews with 12 parents of neonates admitted to two units of university hospital in Southern Thailand between March and April 2025. Data were analyzed using inductive thematic analysis. Results Five major themes emerged: 1) Parents’ recognition and interpretation of their baby’s pain; 2) Parental coping strategies and involvement in pain alleviation; 3) Gaps in communication and information from healthcare professionals; 4) Preferences for information delivery and suggestions for improvement; and 5) Cultural and religious considerations. Conclusions Thai parents demonstrate strong willingness to support their infants’ pain relief but face structural, cultural, and informational barriers. Improved communication, culturally sensitive education, and inclusive visitation policies could enhance FCC and empower parents in neonatal pain management. Clinical implications Standardized communication and culturally tailored education, including materials both Thai and “Ja-Wi”, can better equip parents to support neonatal pain management. Revising visitation policies and enhancing staff training can also promote parental involvement and strengthen FCC in Thai NCUs.No Full Tex
Corporate transitioning to electric vehicle fleets: charging tariffs, total cost of ownership, and the potential for load flexibility
Full text linkThis study estimates the total cost of ownership of corporate battery-electric vehicles (BEVs) in Australia across a range of charging scenarios. It finds that time-varying tariffs have the potential to drive down the costs of vehicle ownership if charging is done at a time when greener and (often) cheaper electricity is available. The degree of benefit varies with several key parameters and operational characteristics, so efficient charging requires careful planning. With the right incentives and infrastructure in place, BEV fleets can serve as a valuable resource for load flexibility for grid operators.Full Tex
Challenging hegemony in the Global South: radio Dhimsa’s cultural and knowledge interventions
Full text linkCommunity media act as vital alternatives to hegemonic media practices and products, providing a much-needed space for marginalised voices in a homogenised and globalised media landscape. While there are strong and long-standing examples of Indigenous community media around the world, there remains a western-centric bias in community radio research, both geographically and epistemologically. This research seeks to address this gap by exploring community radio as a vehicle for and guardian of Indigenous knowledge systems in the Global South. Drawing on an ethnographic case study of Radio Dhimsa, an Indigenous community radio station in the Indian state of Odisha, the findings reveal the critical role of Radio Dhimsa in fostering community participation, amplifying marginalised voices, and countering the dominance of expert-driven knowledge cultures. By highlighting the interplay between community media and Indigenous knowledge systems, this research contributes to the emerging scholarship on community media in the Global South and underscores the transformative potential of community radio as a tool for cultural preservation and participatory communication.Full Tex
Bayesian Analysis and Monte Carlo Simulation for Airport Pavement ACR-PCR Rating
No full textThe maintenance of airport pavements has long been a major focus of academic research. To better understand the relationship between wheel loads and pavement bearing capacity, the International Civil Aviation Organization introduced the aircraft classification rating-pavement classification rating (ACR-PCR) system. Owing to its greater flexibility and adaptability, this system is gradually replacing the traditional aircraft classification number-pavement classification number method. This study employs Monte Carlo Gibbs sampling for a Bayesian analysis of PCR values in flexible runways and uses a multiple linear regression (MLR) model to quantify the influence of layer thickness and modulus on PCR. The analysis is based on construction records of flexible pavements, including statistical data on layer thicknesses and modulus. The study compares Bayesian parameter estimates with MLR results to verify model accuracy. Based on these analyses, engineering recommendations for the construction and maintenance of flexible pavements are proposed. The results show that the combination of Bayesian analysis and MLR effectively predicts PCR values for flexible pavements, providing a reliable basis for optimizing pavement design and maintenance strategies.No Full Tex
Between frameworks and frontlines: Youth leadership for peacebuilding and climate justice in Southeast Asia and Latin America and the Caribbean
No full textEste informe analiza las estrategias que utilizan y los desafíos que enfrentan los activistas juveniles que trabajan en temas de construcción de la paz y justicia climática en el Sudeste Asiático (SEA) y América Latina y el Caribe (ALC). Considerando la falta de atención a ambas regiones en agendas globales como Juventud, Paz y Seguridad (JPS) y Clima, Paz y Seguridad (CPS), este informe busca aportar conocimientos clave desde la perspectiva de los y las jóvenes constructoras/es de paz y activistas climáticos, identificando puntos en común y particularidades percibidas en la intersección de ambas agendas. Estos aportes surgen de un proyecto piloto que incluyo un Taller Virtual de Intercambio de Conocimientos Sur-Sur facilitado por el equipo de investigación en enero 2026, en el cual jóvenes constructores de paz y activistas climáticos de ambas regiones compartieron sus experiencias de incidencia y reflexiones sobre su trabajo. En base a ese taller e investigación bibliográfica, este informe presenta seis recomendaciones basadas en los desafíos experimentados por los activistas juveniles en SEA y ALC en su labor vinculada con juventudes, clima, paz y seguridad.Full Tex
Lower limb biomechanics in femoroacetabular impingement syndrome, asymptomatic cam morphology, and controls during bilateral and single-leg squatting
Full text linkBACKGROUND: Femoroacetabular impingement syndrome (FAIS) is a movement-related disorder and causing hip and/or groin pain in young active adults. Movement patterns in individuals with FAIS may be modifiable through conservative management. Identifying biomechanical differences between cohorts with asymptomatic cam morphology (FAIM) and FAIS could reveal relevant treatment targets. This study compared lower limb kinematics and kinetics between FAIS, FAIM, and healthy controls during double- (DLS) and single-leg squats (SLS). METHODS: Whole-body motion and ground reaction forces were synchronously recorded during five DLS and five SLS. Joint angles, moments, and spatiotemporal parameters (mean squat velocity and maximum squat depth) were compared between groups using a one-way repeated measures ANOVA with statistical parametric mapping (SPM). RESULTS: During DLS, there were no differences in hip or knee kinematics, or hip, knee, or ankle moments. The FAIM group had less ankle dorsiflexion than controls during both descent and ascent (P < .01). During SLS, the FAIM group had greater hip flexion than the FAIS group (P < .01), and the FAIS group had greater external hip rotation than controls (P < .01) and a greater hip abduction moment than the FAIM group (P < .01). CONCLUSION: The greater demands of SLS may require those with FAIS to perform it differently to those without symptoms, regardless of the presence of cam morphology. Given all groups squatted to a similar depth, hip biomechanics - including flexion, rotation, and abduction moments - may be a more relevant target for rehabilitation.Full Tex
The role of advanced AI in improving chatbot-driven consumer experiences
No full textArtificial Intelligence (AI) is redefining modern consumer engagement. The study investigates the impact of AI-driven chatbots on enhancing consumer experiences and facilitating digital transformation using Stimulus, Organism, and Response Theory (SOR). This study employs a review research methodology to gain insights into the research area and applies thematic and inductive analysis for deeper understanding. The findings reveal how AI-enabled interactions function as stimuli that shapes customer responses and experience outcomes through cognitive and emotional factors such as trust and perceived risk. Additionally, the paper contributes to the research field by providing a conceptual framework that offers profound insights about the role of AI and chatbots in enhancing consumers’ experience using the S-O-R model. The paper offers theoretical implications through the application of the S-O-R model and provides managerial implications by demonstrating how AI can be leveraged in business to solve customer problems and strengthen customer connections.No Full Tex
Mediated Urgency: Exploring GBTQ+ Perceptions of Antibiotic-Resistant Sexually Transmitted Infections
No full textOften, research takes place once a health issue is already at ‘crisis’ point. However, health professionals and populations can have different understandings of ‘urgency’. At present, health authorities, scientists and other medical professionals are increasingly concerned about escalating antimicrobial resistance (AMR) in the context of STIs. Clinicians worry about Neisseria gonorrhoeae becoming progressively resistant to last-line treatment, as well as the very limited treatment options for resistant Mycoplasma genitalium. This paper explores how states of ‘urgency’ and ‘crisis’ are socially produced within people's everyday contexts. Drawing on semi-structured interviews with 49 gay and bisexual cisgender men and trans and gender diverse people, we explore contemporary GBTQ+ (gay, bisexual, trans and queer+) understandings of antibiotic-resistant STIs and people's perceptions of urgency. Findings reveal that urgency is shaped by pre-existing understandings of resistance, spatial-temporal dimensions, histories and experiences of pleasure. We conceptualise this as a relation of mediated urgency, which centres the multidimensional production and reception of crisis rather than making a priori assumptions that ‘crisis’ has already arrived. This theoretically and empirically recentres the everyday, relational and contextualised manifestations of how people relate to ‘crisis’, critical to working with communities to address it/them.No Full Tex