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High Thermoelectric Performance Related to PVDF Ferroelectric Domains in P-Type Flexible PVDF-Bi
Get PDFThere is increasing demand to power Internet of Things devices using ambient energy sources. Flexible, low-temperature, organic/inorganic thermoelectric devices are a breakthrough next-generation approach to meet this challenge. However, these systems suffer from poor performance and expensive processing preventing wide application of the technology. In this study, by combining a ferroelectric polymer (Polyvinylidene fluoride (PVDF, β phase)) with p-type Bi Sb Te (BST) a thermoelectric composite film with maximum is produced power factor. Energy filter from ferroelectric-thermoelectric junction also leads to high Seebeck voltage ≈242 µV K . For the first time, compelling evidence is provided that the dipole of a ferroelectric material is helping decouple electron transport related to carrier mobility and the Seebeck coefficient, to provide 5× or more improvement in thermoelectric power factor. The best composition, PVDF/BST film with BST 95 wt.% has a power factor of 712 µW•m K . A thermoelectric generator fabricated from a PVDF/BST film demonstrated P 12.02 µW and P 40.8 W m under 50 K temperature difference. This development also provides a new insight into a physical technique, applicable to both flexible and non-flexible thermoelectrics, to obtain comprehensive thermoelectric performance. [Abstract copyright: © 2023 The Authors. Small published by Wiley-VCH GmbH.
Cyber-Physical Systems and Digital Twins for “Cognitive Building” in the Construction Industry
Get PDFPurpose: Despite the growing attention on the relevance of improved building management systems with cognition in recent years in the architecture, engineering, construction and operation (AECO) community, no review has been conducted to understand the human-environment interaction features of cyber-physical systems (CPS) and digital twins (DTs) in developing the concept of a cognitive building (CB). Thus, this paper aims to review existing studies on CPS and DTs for CB to propose a comprehensive system architecture that considers human-environment interactions.
Design/methodology/approach: Scientometric analysis and content analysis were adopted for this study.
Findings: The scientometric analysis of 1,042 journal papers showed the major themes of CPS/DTs for CB, and these can be categorized into three key technologies to realize CB in the AECO community: CPS, DTs and cognitive computing (CC). Content analysis of 44 relevant publications in the built environment assisted in understanding and evidently confirming the claim of this study on the integration of CPS and DTs for CB in construction by also involving the CC. It is found and confirmed that CB can be realized with CPS and DTs along with the CC. A CB system architecture (CBSA) is proposed from the three key technologies considering the human-environment interactions in the loop. The study discovered the potential applications of the CBSA across the building lifecycle phases, including the design, construction and operations and maintenance, with the potential promise of endowing resilience, intelligence, greater efficiency and self-adaptiveness. Based on the findings of the review, four research directions are proposed: human-environment interactions, CB for sustainable building performance, CB concept for modular buildings and moving beyond CB.
Originality/value: This study stands out for comprehensively surveying the intellectual core and the landscape of the general body of knowledge on CPS/DTs for CB in the built environment. It makes a distinctive contribution to knowledge as it does not only propose CBSA by integrating CPS and DTs along with CC but also suggests some potential practical applications. These may require expert judgments and real case examples to enhance reproducibility and validation
Archiving Justice
Get PDFThis chapter interrogates this link between archives and transitional justice, and idea of justice more generally, in three parts. First I examine the ways in which the archive reinforces core aspects of transitional justice as practice and a set of normative values. This does so by both focusing on the support role that archives play in rendering justice a possibility (and in many cases beckoning a ‘justice to come’)(Derrida 1992; and 2001), and second viewing the archive as itself a site of justice in and of itself. The second section turns to a more critical assessment of the relationship between archives and justice, as I explore the archive’s logics, and drive. Ultimately, this points to the role that archives play in the governance – and disciplining – of community, and shows a concerning synergy between archival practice and the very violence that transitional justice (claims to) confront. The final section looks at practices that might offer a way in which a more transformative vision of archive and community can emerge. This both focuses on what Stewart Motha and Honni van Rijswijk (2016) have called the ‘counter-archive’ and explicitly points to the possibility of alternative archival practices that drawn on an aesthetic approach to the production of knowledge, and community
Subwoofer array design for optimal performance and minimal noise pollution in the Roman theatre of Italica, Spain
Get PDFSubwoofer arrays are widely used in live sound events. However, the performance of sound systems and the generated environmental noise pollution in the vicinity of Roman theatres is not well researched and documented. The investigation aimed to determine the most suitable subwoofer array configuration for an outdoor Roman theatre according to their low frequency coverage across the audience area and overspill on nearby residential areas. Performance suitability was determined by measuring the overall sound pressure (dBA) and spectrum levels of the arrays within the audience area at several locations representative of nearby residential areas. The Array Performance Rating (APR) was calculated for each array configuration to complement performance assessments. Results showed a notorious difference between coupled and uncoupled arrays, as well as between ground-based and flown subwoofer configurations. It was proven that the flown point source array offered overall less sound pressure levels and spectral variability in the audience plane and it caused the least environmental noise pollution. The conclusions drawn from this study can provide valuable guidance applicable to future sound system deployments and reconstruction projects of ancient outdoor theatres of similar architectural and environmental characteristics
Just a famous actor sitting in front of a judge: Hugh Grant’s presentation of self in the Leveson inquiry
Get PDFWith its attempts at humour, loosely controlled expressive behaviour and balance of haughtiness and deference, Hugh Grant’s testimony for the Leveson inquiry is rich territory for the analysis of celebrity self-presentation that complicates the dichotomous paradigm of ‘persona’ versus ‘veridical self’. Through detailed analysis of Grant’s physicality and use of prosody, this article focuses on his performance of status and use of humour during the cross-examination. These are contextualised within his diegetic and interview performances to argue that in this presentation of self, Grant showcases his comedic performance technique but seems less concerned with presenting a signature set of mannerisms, which scholars have noted conventional star performance entails. Rather, Grant performs his celebrity status through a posture of stiff hauteur, which enables the humour in his self-deprecating remarks, both of which are key elements of his persona
Insightful Electric Vehicle Utility Grid Aggregator Methodology Based on the G2V and V2G Technologies in Egypt
Get PDFDue to the exponential expansion of the global fleet of electric vehicles (EVs) in the utility grid, the vehicle-to-grid paradigm is gaining more attention to alleviate the pressure on the grid. Therefore, an EV aggregator acts as a resilient load to enhance the power deficiency in the electrical grid. This paper proposes the vital development of a central aggregator to optimize the hierarchical bi-directional technique throughout the vehicle-to-grid (V2G) and grid-to-vehicle (G2V) technologies. This study was implemented using three different types of EVs that are assumed to penetrate the utility grid throughout the day in an organized pattern. The aggregator determines the number of EVs that would participate in the electric power trade during the day and sets the charging/discharging capacity level for each EV. In addition, the proposed model minimized the battery degradation cost while maximizing the revenue of the EV owner using the V2G technology and ensuring a sufficient grid peak load demand shaving based on the genetic algorithm (GA). Three case studies were investigated based on the parking interval time where the battery degradation cost was minimized to reach approx. 82.04%. However, the revenue of the EV owner increased when the battery degradation cost was ignored. In addition, the load demand decreased by 26.5%. The implemented methodology ensured an effective grid stabilization service by shaving the load demand to identify the average required power throughout the day. The efficiency of the proposed methodology is ensured since our output findings were in good agreement with the literature survey
Reliability Improvement of Magnetic Corrosion Monitor for Long-Term Applications
Get PDFElectromagnetic techniques are widely employed for corrosion detection, and their performance for inspection of corrosion is well established. However, limited work is carried out on the development and reliability of smart corrosion monitoring devices for tracking internal or buried thickness loss due to corrosion remotely. A novel smart magnetic corrosion transducer is developed for long-term monitoring of thickness loss due to corrosion at critical locations. The reliability of the transducer is enhanced by using a dissimilar active redundancy approach. The improved corrosion monitor has been tested in the ambient environment for seven months to evaluate the stability against environmental factors and degradation. The monitor is found to show great sensitivity to detect defects due to corrosion. Detection of anomalous patterns in the time series data received from the monitors is accomplished by using Pearson’s correlation coefficient. The critical component of the monitor is identified at the end of the test. Research findings reveal that, compared to the existing corrosion monitoring techniques in the industry, the detection and isolation of faulty sensor features introduced in this study can contribute to reliable monitoring of thickness loss due to corrosion in ferromagnetic structures over an extended period of tim
System Framework for Digital Monitoring of the Construction of Asphalt Concrete Pavement Based on IoT, BeiDou Navigation System, and 5G Technology
Get PDFIn the construction of asphalt pavement, poor quality is often the main reason for damage to the pavement, which necessitates the use of monitoring systems during the construction stage. Therefore, this study focuses on building an asphalt concrete pavement construction monitoring system to monitor the construction phase. Through a literature review and semi-structured interviews with industry experts, this paper provides an in-depth understanding of the goals and obstacles of asphalt pavement monitoring and discusses directions for improvement. Subsequently, based on the analysis of the interview results, a system framework for asphalt concrete pavement construction monitoring was constructed, and the system was successfully developed and applied to a highway construction project. The results show that the monitoring system significantly improves the construction quality of asphalt concrete pavement, improves the intelligent level of pavement construction management, and promotes the digital development of highway construction
Psychometric properties and psychological correlates of the COVID‐19 Anxiety Syndrome Scale: A comprehensive systematic review and meta‐analysis
Get PDFCOVID-19 has led to the demise of millions of people worldwide; additionally, it has resulted in a significant economic and mental health burden. Since the onset of the COVID-19 pandemic, various measures have been constructed to evaluate pandemic-related fear and anxiety. The COVID-19 Anxiety Syndrome Scale (C-19ASS) is a promising measure which assesses coping strategies (e.g., avoidance, checking, worrying, and threat monitoring), termed ‘COVID-19 Anxiety Syndrome’, in response to COVID-19 fear and anxiety. The measure has been broadly welcomed, leading to its use in Brazil (Portuguese), China, Greece, Indonesia, the Philippines, Iran (Farsi), Italy, Saudi Arabia (Arabic), Turkey, the United Kingdom, and the United States. To gain a better understanding of the relevance of the COVID-19 Anxiety Syndrome, we conducted a systematic review and meta-analysis to explore the psychological correlates and psychometric properties of the C-19ASS. Through the analysis of a total of 17,789 individuals (age range 19 to 70; female = 33% to 85%), the C-19ASS demonstrated a consistent factor structure, measurement invariance across gender, and acceptable reliabilities. Furthermore, a significant association with COVID-19 anxiety, depressive symptoms, generalized anxiety, health anxiety, psychological distress, and functional impairment (work and social adjustment) during the COVID-pandemic was observed. When considering the Big Five personality traits, the C-19ASS and its subscales were only significantly and negatively associated with extraversion; only the total score on the measure was associated with neuroticism. The observed effect sizes ranged from very small to medium. Given that all included studies (K = 24) were cross-sectional, and due to the nature of the COVID-19 Anxiety Syndrome which may well persist after the pandemic ends, it is recommended to continue screening society for the persistence of this syndrome
Risk and resilience: exploring the potential of LGBTQ third sector and academic partnership
Get PDFThe Risk and Resilience Explored [RaRE] Project (2010–2016) was a collaborative process involving a third sector agency, university partners and volunteers to better understand the risk and resilience factors associated with specific mental health issues among lesbian, gay, bisexual, trans, and queer (LGBTQ) people. In this article, we discuss the project’s collaborative ethos, based on a Community-Based Participatory Research (CBPR) approach. We explain how the CBPR approach benefitted from including academic partners from the onset of the project, as well as from the direct and indirect engagement of community volunteers. We then explore some of our experience of third sector and academic partner collaboration in more depth, highlighting topic summaries salient to this partnership: support and continuity, upskilling of staff and volunteers for mutual benefit, accessible communication across sectors, and aligning priorities. We conclude by setting out recommendations based on our experience for those interested in developing similarly collaborative projects