bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the applicability of a modified strain approach to predict the fatigue life of HFMI-treated transverse stiffeners under variable amplitude loading
Authors: Löschner Daniel , Engelhardt Imke , Nitschke-Pagel Thomas , Ummenhofer Thomas 
Published: March 2024

AbstractThis paper analyses the applicability of a modified strain approach to predict the fatigue life of HFMI-treated transverse stiffeners under variable amplitude loading (VAL) with random load sequences of a p(1/3) and linear shaped spectrum. Local stresses are determined using linear-elastic finite element analyses. The measured weld geometry and component imperfections are considered. From the hardness of the HFMI-treated zone and the base material, the elastic–plastic material behaviour and Coffin-Manson parameters to describe the damage parameter Woehler curve are estimated. Based on a hysteresis counting method (HCM), the damage for each closed hysteresis is calculated. The applied notch strain approach includes the impact of residual stresses and the influence of surface roughness. Thus far, the application of similar approaches has only been validated for welded components with comparatively low residual stresses and HFMI-treated welds subjected to constant amplitude loading. To validate the accuracy of the approach for HFMI-treated welds under variable amplitude loading, the approximated fatigue life is compared to the number of cycles derived from experimental investigations. In this study, it is shown in conjunction with experimental results that it is essential to consider the strength of the base material near the weld when assessing the service life. This area can be more critical than the HFMI-treated weld toe.
A Thalamocortical Perspective on Sleep Spindle Alterations in Neurodevelopmental Disorders
Authors: Herrera Carolina Gutierrez , Tarokh Leila 
Published: March 2024

Abstract
Purpose of Review
Neurodevelopmental disorders are a group of conditions that affect the development and function of the nervous system, typically arising early in life. These disorders can have various genetic, environmental, and/or neural underpinnings, which can impact the thalamocortical system. Sleep spindles, brief bursts of oscillatory activity that occur during NREM sleep, provide a unique in vivo measure of the thalamocortical system. In this manuscript, we review the development of the thalamocortical system and sleep spindles in rodent models and humans. We then utilize this as a foundation to discuss alterations in sleep spindle activity in four of the most pervasive neurodevelopmental disorders—intellectual disability, attention deficit hyperactivity disorder, autism, and schizophrenia.

Recent Findings
Recent work in humans has shown alterations in sleep spindles across several neurodevelopmental disorders. Simultaneously, rodent models have elucidated the mechanisms which may underlie these deficits in spindle activity. This review merges recent findings from these two separate lines of research to draw conclusions about the pathogenesis of neurodevelopmental disorders.

Summary
We speculate that deficits in the thalamocortical system associated with neurodevelopmental disorders are exquisitely reflected in sleep spindle activity. We propose that sleep spindles may represent a promising biomarker for drug discovery, risk stratification, and treatment monitoring.
Gratitude Buffers Against the Effects of Stressful Life Events on Adolescents’ Externalizing Behavior but Not Internalizing Behavior
Authors: Webb Mimi S. , Whitmire Jackson B. , Hills Kimberly J. , Huebner E. Scott 
Published: March 2024

AbstractThe identification of psychological strengths that foster healthy development in youth has become a major topic of exploration in the field of positive psychology. Gratitude is a trait-like characteristic with qualities indicative of a potential psychological strength that may serve as a protective factor for early adolescents in the face of stressful life events (SLEs). This two-wave longitudinal study utilized data from a sample of 830 middle school students from the Southeastern United States. Path analysis was employed to investigate gratitude’s role as a moderator in the relations between prior SLEs and early adolescents’ frequencies of externalizing and internalizing coping behaviors. The interaction between SLEs and gratitude significantly predicted early adolescents’ subsequent frequencies of externalizing behaviors, but not internalizing behaviors. The results provided support for gratitude as a key psychological strength in early adolescents. The results also implied the benefits of promoting youths’ gratitude in efforts to prevent externalizing behavior.
The Third Country Regime for Investment Firms
Authors: Louisse Marije , van Rijn Mirik 
Published: March 2024

AbstractIn this article we discuss how an investment firm established outside the EU may provide services (to clients) in the EU. We explore how such third country firms may enter the European market and discuss the current state of the third country regimes as provided (partly) under EU law, their use—or notable lack thereof—and the challenges involved in the supervision of third country firms. We note that the recent updates to the third country equivalence regime for the provision of services to professional clients render the use of this regime even more difficult. In respect of the (optional) third country regime for the provision of services to retail clients, we observe that this regime is much akin to a full license requirement, albeit with notable difficulties when it comes to supervision and enforcement. Altogether, we come to the unfortunate conclusion that the EU third country regime for investment firms established in third countries can barely be called successful.
Dilation and energy evolution mechanisms of sandstone under true-triaxial mining unloading conditions
Authors: Li Wenpu , Wang Ze , Feng Guorui , Zhang Huan , Du Jiahui , Li Hao , Duan Minke 
Published: March 2024

AbstractThe study of sandstone dilation characteristics under actual mining and excavation conditions promotes the safe and efficient development of underground engineering. Accordingly, this study employs true-triaxial testing to reveal the influence of intermediate principal stress and unloading action in the minimum principal stress directions on rock dilation. In the stress–strain analysis, with increasing intermediate principal stress, the maximum compression of the sandstone volume in the loading and unloading tests increases, while the onset of dilation is delayed under loading conditions and initially delayed and then accelerated under unloading conditions. The energy storage limit of sandstone under the unloading test tends to decrease with increasing intermediate principal stress, contrary to the results of the loading test, and the characteristic point at which the percentage of dissipative energy is greater than that of elastic energy occurs earlier. The energy of sandstone in the unloading test in the intermediate principal stress direction was smaller than that in the minimum principal stress direction, while the loading test showed the opposite trend. Combining these two analyses can elucidate the restraining effect and tensile stress effect of the intermediate principal stress, as well as the weakening and strengthening effects of the unloading action on the two effects. By further combining the average elastic energy and dissipative energy conversion rate under different test conditions, the weakening effect was manifested by shortening the compressive deformation course, and the strengthening effect was manifested by developing the degree of plastic expansion deformation. This study provides important guidance for deep mining projects.
A review of the current state-of-the-art on in situ monitoring in electron beam powder bed fusion
Authors: Grasso Marco , Colosimo Bianca Maria 
Published: March 2024

AbstractThe industrial development of electron beam powder bed fusion (PBF-EB) is relatively younger and much more limited in terms of global widespread and revenues compared to laser powder bed fusion (PBF-L). Nevertheless, PBF-EB has been adopted in some of the most successful industrial case studies of metal AM, as it provides specific benefits and capabilities that make it a key enabling technology in a variety of industrial applications. Moreover, the recent years have seen a rapid evolution with new actors and new systems entering the market, together with a considerable increase of research and innovation programs. A field of major interest is the development and continuous improvement of in situ sensing and monitoring methods to anticipate the detection of defects, to predict the final quality of the part, and to rethink product qualification procedures. The technological features of the PBF-EB process have motivated the development of solutions that differ from the ones in PBF-L. Some of them have reached a good maturity level, being recently integrated into industrial machines, while others still deserve further research. This study explores the current state-of-the-art on in situ and in-line monitoring of the PBF-EB process, aiming to provide an up-to-date overview of the major differences with respect to PBF-L, currently available methods and their performances, as well as open issues, challenges to be tackled, and perspective for future research and industrial developments.
“Some People Sit, Some People Stand, That’s Just What We Do”: a Qualitative Exploration of Sit-Stand Desk Use in Naturalistic Settings
Authors: Deery Elizabeth , Buckley John , Morris Michael , Kennedy Lynne 
Published: March 2024

AbstractProlonged sedentary behaviour is associated with poor health. Office-based workers spend much of the working day sitting. Sit-stand desks have become a popular intervention, but real-life experiences of the value of sit-stand desks remain relatively unexplored outside of research-led interventions. A qualitative study was therefore undertaken to explore real-life experiences, including perceived barriers, and facilitators of using sit-stand desks. Six focus-group interviews were undertaken with a total of 34 desk-based employees in North-West England. Interviews were transcribed and analysed using thematic analysis. Three main themes emerged: The Sedentary Office, Motivators, and The Active Office. The Sedentary Office highlighted participants’ frustration with an increasingly sedentary office environment. Motivators to reducing sitting time were knowledge of the health consequences of prolonged sitting, previous (ill) health, and the potential benefits expected. The Active Office highlighted the importance of control, choice, enhanced interaction with colleagues, and the benefits associated with moving more and enhancing an overall sense of workplace wellbeing. Perceived benefits, facilitators, and barriers - experienced and observed – from sit-stand desk use in the real world were examined, thus contributing to important discussions of transferability. Overall, the study shed light on the perceived facilitators, benefits, and drawbacks of sit-stand desk work whilst also giving evidence of the real-world acceptability and research translation of sit-stand desk use. Future research should examine this in multiple contexts and should explore implications of an increasing prevalence in home working.
The Benefit of a Multi-wedge Acoustic Black Hole at Low-frequency Mitigation
Authors: Käfer Max , Dohnal Fadi 
Published: March 2024

Abstract
Introduction
Acoustic black holes (ABH) are capable to mitigate structural vibrations efficiently above a certain cut-on frequency. The most commonly used geometry for a flexible beam is a simple wedge following a power-law curve. A simple wedge demands large dimensions for achieving mitigation in the low-frequency range below 1000 Hz. It was shown recently by experiments and numerical simulation that a multi-wedge configuration is beneficial for realizing a compact design and still showing good performance at low frequencies.

Materials and Methods
The WKB approximation is extended for a single-wedge design. Expressions for the reflection coefficient and cut-on frequency are discussed for an arbitrary number of wedges—the suggested multi-wedge ABH.

Results
The main benefit of the stacked multi-wedge ABH is a great improvement in performance in the low-frequency range. A numerical example highlights the successful vibration mitigation. It is shown how a multi-wedge ABH is tuned towards low-frequency in terms of cut-on frequency and reflections’ coefficient. The improved performance of a multi-wedge ABH is benchmarked against the well-established simple ABH.
Comparative analysis of the application efficiency of gold nanoparticles-based SERS in four foodborne pathogenic microbes
Authors: Liu Hourong , Chen Niannian , Ning Xue , Gao Fengtao 
Published: March 2024

AbstractIt has been widely reported that SERS can detect foodborne pathogenic bacteria, but SERS has only been limited to the detection of purified single bacteria. However, there’s few single bacterial infections in the natural state were found at the most time, and rare comparative investigations of different Gram-negative and Gram-positive bacteria by SERS exist. At the present study, we are aiming at the comparative analysis of the detection efficiency toward different foodborne pathogenic microbes by a conventional citrate-reduced gold colloid, including Escherichia coli, Salmonella enteritidis, Staphylococcus aureus and Listeria monocytogenes. The SERS spectra of samples were collected with sterile 0.5% NaCl solution as aggregating compound. First, the stability of each bacterial were detected with gold nanoparticles. Afterward, SERS signals of the four bacteria were compared at different concentrations, and it was found that Gram-positive and Gram-negative bacteria have different minimum sensitivity and detection stability. Next, the mixed bacterial SERS detection was applied to classify and identify the similar Raman spectra. Spectral data were analyzed using multivariate data analysis methods, including principal component analysis (PCA) and hierarchical cluster analysis (HCA). The SERS procedure we proposed, which utilized gold nanoparticles adsorbing on bacteria and multivariate analysis, allowed differentiation of species. The results of this pilot study demonstrate the potential of SERS to rapidly identify Gram-negative and Gram-positive foodborne pathogens.
Evaluation of antibacterial activity of an experimental dental adhesive containing synthesized quaternary ammonium compound: in vitro study
Authors: El-Deeb Mona , Ismail Maha M. , Kenawy El-Refaie , Habib Nour A. 
Published: March 2024

Abstract
Background
Dental adhesives with immobilized antibacterial agents are formulated to combat bacterial invasion along the tooth-restoration interface. This study aims to evaluate the antibacterial effect of synthesized quaternary ammonium compound (QAC) incorporated into commercial dental adhesive.

Methods
QAC was synthesized from 2-(Dimethylamino) ethyl methacrylate and 1-Bromobutane and characterized using CHN (Carbon, Hydrogen, Nitrogen), FTIR (Fourier transform infrared) and H+NMR (Proton nuclear magnetic resonance) analyses. The synthesized QAC was assessed for its cytotoxicity and its antibacterial activity against S. mutans using disc diffusion method, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC), time-kill kinetics test, and TEM imaging. The QAC was added to the primer of a commercially available adhesive (OptiBond XTR) at two concentrations; 20 and 40 mg mL−1 representing the MIC and MBC, respectively. The antibacterial properties of the experimental adhesives, commercial antibacterial adhesive Clearfil SE Protect containing 12-methacryloyloxydodecylpyridinium bromide (MDPB), and commercial vehicle (OptiBond XTR) were compared using time-kill kinetics test. Statistical analysis by ANOVA followed by tukey post-hoc test (P < 0.05).

Results
Disc diffusion and time-kill kinetics tests showed potent antibacterial action of QAC, both in the unpolymerized and the cured forms. MIC and MBC were 20 and 40 mg mL−1 respectively. There was no statistically significant difference between experimental adhesives and Clearfil Protect with more than 99% reduction in bacterial count, while OptiBond XTR showed no bacterial killing up for up to 10 h.

Conclusions
The synthesized QAC added to a commercially available adhesive imparted antibacterial properties, thus providing an affordable adhesive system to the local market.
The harms of terminology: why we should reject so-called “frontier AI”
Authors: Helfrich Gina 
Published: March 2024

AbstractIn the mid-2023, promoters of artificial intelligence (AI) as an “existential risk” coined a new term, “frontier AI,” that refers to “highly capable foundation models that could possess dangerous capabilities sufficient to pose severe risks to public safety.” Promoters of this new term were able to disseminate it via the United Kingdom (UK) government’s Frontier AI Taskforce (formerly the Foundation Models Taskforce) as well as the UK’s AI Safety Summit, held in November 2023.I argue that adoption of the term “frontier AI” is harmful and contributes to AI hype. Promoting this new term is a way for its boosters to focus the public conversation around the AI-related risks they think are most important, namely “existential risk”—a scenario in which AI is able to bring about the destruction of humanity. Simultaneously, “frontier AI” is a re-branding exercise for the large-scale generative machine learning (ML) models that have been shown to cause severe and pervasive harms (including psychological, social, and environmental harms). Unlike “existential risk,” these harms are actual rather than theoretical, whereas the term “frontier AI” moves our collective focus away from actual harms to focus on hypothetical doomsday scenarios.Moreover, “frontier AI” as a term invokes the colonial mindset, further reinscribing the harmful dynamics between the handful of powerful Western companies who produce today’s generative AI models and the people of the “Global South” who are most likely to experience harm as a direct result of the development and deployment of these AI technologies.
Engaging the many-hands problem of generative-AI outputs: a framework for attributing credit
Authors: Khosrowi Donal , Finn Finola , Clark Elinor 
Published: March 2024

AbstractThe recent wave of generative AI (GenAI) systems like Stable Diffusion or ChatGPT that can produce images, text and code from human prompts raises controversial issues about creatorship, originality, creativity and copyright. This paper focuses on creatorship: who creates and should be credited with the outputs made with the help of GenAI? There is currently significant moral, legal and regulatory uncertainty around these questions. We develop a novel framework, called CCC (collective-centered creation), that helps resolve this uncertainty. According to CCC, GenAI outputs are created by collectives in the first instance. Claims to creatorship come in degrees and depend on the nature and significance of individual contributions made by the various agents and entities involved, including users, GenAI systems, developers, producers of training data and others. We demonstrate how CCC can help navigate a range of ongoing controversies around the responsible development and deployment of GenAI technologies and help more accurately attribute credit where it is due.
Spatial heterogeneities of residents' sentiments and their associations with urban functional areas during heat waves– a case study in Beijing
Authors: Zhu Yanrong , Wang Juan , Yuan Yuting , Meng Bin , Luo Ming , Shi Changsheng , Ji Huimin 
Published: March 2024

AbstractThe intensification of global heat wave events is seriously affecting residents' emotional health. Based on social media big data, our research explored the spatial pattern of residents' sentiments during heat waves (SDHW). Besides, their association with urban functional areas (UFAs) was analyzed using the Apriori algorithm of association rule mining. It was found that SDHW in Beijing were characterized by obvious spatial clustering, with hot spots predominately dispersed in urban areas and far suburbs, and cold spots mainly clustered in near suburbs. As for the associations with urban function areas, green space and park areas had significant effects on the positive sentiment in the study area, while a higher percentage of industrial areas had a greater impact on negative SDHW. When it comes to combined UFAs, our results revealed that the green space and park area combined with other functional areas was more closely related to positive SDHW, indicating the significance of promoting positive sentiment. Subdistricts with a lower percentage of residential and traffic areas may have a more negative sentiment. There were two main combined UFAs that have greater impacts on SDHW: the combination of residential and industrial areas, and the combination of residential and public areas. This study contributes to the understanding of improving community planning and governance when heat waves increase, building healthy cities, and enhancing urban emergency management.
Achieving carbon neutrality in Africa is possible: the impact of education, employment, and renewable energy consumption on carbon emissions
Authors: Elom Chinyere Ori , Onyeneke Robert Ugochukwu , Ankrah Daniel Adu , Deffor Eric Worlanyo , Ayerakwa Hayford Mensah , Uwaleke Chidebe Chijioke 
Published: March 2024

AbstractThis paper analysed the causal link between education, employment, renewable energy consumption and carbon emissions in Africa, where there is scant evidence. Relying on panel data obtained from the World Development Indicators for thirty-two African countries covering a period of 19 years, and five panel rigorous regression models, we found that renewable energy, investment in education, school enrolment, net national income per capita, and employment had negative and significant effects on carbon emission, thus increasing these predictors would result in significant reduction in carbon emission in Africa. We identified a bidirectional causality between carbon emissions and net national income per capita, education expenditure and renewable energy consumption, and carbon emissions and employment. Our findings suggest that investment in education, renewable energy, and employment are relevant in mitigating carbon emissions in Africa. We recommend African governments to invest heavily in education, improve school enrolment, environmental education, renewable energy and employment provision to mitigate carbon emissions.
Graphical Abstract