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Sökning: WFRF:(Kumar P) > Högskolan Väst

  • Resultat 1-5 av 5
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1.
  • Jones, Benedict C, et al. (författare)
  • To which world regions does the valence-dominance model of social perception apply?
  • 2021
  • Ingår i: Nature Human Behaviour. - : Springer Science and Business Media LLC. - 2397-3374. ; 5:1, s. 159-169
  • Tidskriftsartikel (refereegranskat)abstract
    • Over the past 10 years, Oosterhof and Todorov's valence-dominance model has emerged as the most prominent account of how people evaluate faces on social dimensions. In this model, two dimensions (valence and dominance) underpin social judgements of faces. Because this model has primarily been developed and tested in Western regions, it is unclear whether these findings apply to other regions. We addressed this question by replicating Oosterhof and Todorov's methodology across 11 world regions, 41 countries and 11,570 participants. When we used Oosterhof and Todorov's original analysis strategy, the valence-dominance model generalized across regions. When we used an alternative methodology to allow for correlated dimensions, we observed much less generalization. Collectively, these results suggest that, while the valence-dominance model generalizes very well across regions when dimensions are forced to be orthogonal, regional differences are revealed when we use different extraction methods and correlate and rotate the dimension reduction solution. PROTOCOL REGISTRATION: The stage 1 protocol for this Registered Report was accepted in principle on 5 November 2018. The protocol, as accepted by the journal, can be found at https://doi.org/10.6084/m9.figshare.7611443.v1 .
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2.
  • Dom, R., et al. (författare)
  • Design and development of ferrite composite film electrode for photoelectrochemical energy application
  • 2014
  • Ingår i: Materials Science Forum. - : Trans Tech Publications Ltd. - 0255-5476 .- 1662-9752. - 9783038350675 ; 781, s. 45-61
  • Tidskriftsartikel (refereegranskat)abstract
    • Development of efficient photoanodes for water splitting under solar light is desirable to surmount the possible fuel crisis in future. Ferrite systems, with their excellent visible light absorption capability, stability, non-toxicity, cost-effectiveness and abundance, are being preferred to titanates, niobates and sulfides. The present work briefly reviews the modified form of ferrites. Additionally, ZnFe2O4 an n-type semiconductor with the low band gap (~1.9eV) has been considered as special case of visible light PEC application. The work further emphasizes on the utilization of solution processed techniques to develop the ferrite photoanodes. The tuning of photoanode properties by virtue of electrode fabrication parameters say deposition parameters viz., precursor concentration, pH, stoichiometry has been reviewed and discussed. © (2014) Trans Tech Publications, Switzerland.
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3.
  • Dom, R., et al. (författare)
  • Eco-friendly ferrite nanocomposite photoelectrode for improved solar hydrogen generation
  • 2013
  • Ingår i: RSC Advances. - 2046-2069. ; 3:35, s. 15217-15224
  • Tidskriftsartikel (refereegranskat)abstract
    • For the first time, a ferrite nanocomposite photoelectrode (FNCP) has been fabricated and investigated for photoelectrochemical hydrogen production from water under simulated solar light. The ZnFe2O4:Fe 2O3 nanocomposite photoanode has been fabricated via a single step methodology using a novel approach involving the solution precursor plasma spraying technique. The FNCP is achieved by optimal phase formation during the deposition of the ferrite film (∼10 μm) over a stainless steel substrate. It exhibits an enhanced photoactivity 6 times higher compared to pure ZnFe2O4 (ZFO), under simulated-solar (AM1.5 G) illumination. Its Mott-Schottky characterization reveals an n-type semiconducting behaviour, indicating an order of magnitude higher donor density (Nd ∼ 1017 cm-3) than the pure phase ZnFe2O4 electrode. It also exhibits a low band gap of 1.94 eV demonstrating that it can more efficiently absorb visible light photons than other systems comprising of bare zinc ferrite or iron oxide. The FNCP yielded a solar-to-hydrogen conversion efficiency of 1.25% under simulated solar radiation (AM1.5 G) with a hydrogen evolution rate of 99 μmol h-1. Electrochemical impedance spectroscopy of the FNCP revealed a significantly improved charge transfer characteristic compared to ZnFe2O 4. An enhanced photoactivity for the oxidation of water from the FNCP is attributed to its improved optical absorption and better charge transfer properties induced by the existence of Fe2O3 in ZnFe 2O4. © The Royal Society of Chemistry 2013.
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4.
  • Puthal, Deepak, et al. (författare)
  • Revolutionizing Cyber Security : Exploring the Synergy of Machine Learning and Logical Reasoning for Cyber Threats and Mitigation
  • 2023
  • Ingår i: 2023 IEEE Computer Society Annual Symposium on VLSI (ISVLSI). - : IEEE Computer Society. - 9798350327694 - 9798350327700
  • Konferensbidrag (refereegranskat)abstract
    • The integration of machine learning (ML) and logical reasoning (LR) in cyber security is an emerging field that shows great potential for improving the efficiency and effectiveness of security systems. While ML can detect anomalies and patterns in large amounts of data, LR can provide a higher-level understanding of threats and enable better decision-making. This paper explores the future of ML and LR in cyber security and highlights how the integration of these two approaches can lead to more robust security systems. We discuss several use cases that demonstrate the effectiveness of the integrated approach, such as threat detection and response, vulnerability assessment, and security policy enforcement. Finally, we identify several research directions that will help advance the field, including the development of more explainable ML models and the integration of human-in-the-loop approaches. © 2023 IEEE.
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5.
  • Saha, B. P., et al. (författare)
  • Investigation of compaction behavior of alumina nano powder
  • 2012
  • Ingår i: Powder Technology. - 0032-5910 .- 1873-328X. ; 224, s. 90-95
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper investigates the impact of natural agglomerates on powder processing and consolidation through a comprehensive study of compaction of alumina powders of different particle size (ranging from 10 to 650 nm) and shape (spherical and irregular). The yield points of individual powders were determined from the green density-pressure relationship to ascertain the effect of initial particle size on agglomeration. The effect of surface modification by binder addition, which suppresses the significance of the initial particle size, was also studied. Diametral compression tests were carried out to estimate the green strength of the compacts. Results revealed that the green strength is strongly influenced not only by the initial particle size but also by the particle size distribution. The diametrically broken samples were subjected to fractographic studies followed by image analysis to calculate the agglomerate area fraction. The area fraction was found to be high for samples with low green strength and vice versa. (C) 2012 Elsevier B.V. All rights reserved.
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  • Resultat 1-5 av 5

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