bluuebunny/crossref_metadata_2025_split huggingface dataset:
Motor compensation, not sensory error, regulates sensorimotor adaptation in human vocal pitch production in continuous speech
Authors: Lu Yuhan , Tang Xiaowei , Xiao Zhenyan , Xu Anqi , Chen Junxi , Tian Xing 
Published: October 2024

AbstractMotor control is essential for organisms to efficiently interact with the external world by maintaining accuracy and precision of actions and adapting to changes in the future. For example, speaking, one of the most complicated scenarios of motor control, utilizes sensory errors and resultant motor compensation to precisely control articulation. However, how sensory errors and compensations regulate subsequent production remains in debate. Here, we implemented a serial-dependence paradigm by randomly perturbing the pitch of auditory feedback in a sequence of trials to dissociate the effects of sensory errors and motor compensation in controlling continuous speech. We found that motor compensation in preceding trials, rather than sensory errors, affected the compensatory responses in the current trial. Critically, this compensation-driven adaptation remained across speaking of different vowels but only when adjacent vowels were embedded within the word boundary. The study provides ecologically valid evidence supporting that error-based motor compensation, incorporating cognitive constraints, regulates adaptive changes in successive actions.Graph abstract
Analysis of fracton-gravity stability
Authors: Afxonidis Evangelos , Caddeo Alessio , Hoyos Carlos , Musso Daniele 
Published: October 2024

We study the stability of fracton gravity, a variant of linearized gravity where the gauge symmetry is restricted to longitudinal diffeomorphisms. These transformations can be connected to a spacetime generalization of dipole symmetry, hence the tag fracton. We find that fracton gravity features an instability in the spin-1 sector corresponding to solutions with growing amplitude. This dynamical instability can be removed by tuning the couplings of the theory. Nonetheless, the Hamiltonian for the spin-1 modes remains always unbounded from below when evaluated on the classical solutions. We find no other sources of instability in the spin-2 or spin-0 sectors. We analyze in detail the canonical formulation and the constraints arguing that neither auxiliary fields nor gauge-fixing conditions can be employed to remove the problematic vector modes or stabilize them.

Published by the American Physical Society
2024
Multicolor wavefront sensing using Talbot effect for high-order harmonic generation
Authors: Du Yang , Li Kui , Niu Jin , Lin Angyi , Li Jie , Fan Zhongwei , Wu Guorong , Zhang Xiaoshi , Zhang Fucai 
Published: October 2024

High-order harmonic generation (HHG) using femtosecond lasers is an efficient and cost-effective method for producing attosecond and femtosecond light in the extreme ultraviolet and soft x-ray regions. This technique generates high-brightness harmonic beams with stable spectra, intensity, and wavefronts, making it a valuable tool for applications such as nanoimaging, material metrology, and studies of ultrafast dynamics. Accurate wavefront measurement of HHG beams is essential for analyzing complex incident fields, understanding atomic responses, and enhancing applications such as attosecond-driven ultrafast processes. However, quantifying the wavefronts of each harmonic component remains a challenge. Here, we present a multicolor wavefront sensing for HHG beams using the Talbot effect, validated theoretically and experimentally. Our method reconstructs individual high-order harmonic wavefronts with a spectral resolution of 4.8 eV, capturing multiple harmonic wavelengths in a single scan along the propagation direction, without the need for additional spectrometers or complex calibrations. This approach surpasses conventional Talbot effect wavefront sensing, which typically relies on quasimonochromatic waves or wavelength-averaging. Additionally, we introduce a high-accuracy centroid detection strategy that reduces tracking errors to the thousandths of a pixel while maintaining high computational efficiency, paving the way for broader applications in imaging and metrology.

Published by the American Physical Society
2024
Waterless structures in the Protein Data Bank
Authors: Wlodawer Alexander , Dauter Zbigniew , Rubach Pawel , Minor Wladek , Loch Joanna I. , Brzezinski Dariusz , Gilski Miroslaw , Jaskolski Mariusz 
Published: October 2024

The absence of solvent molecules in high-resolution protein crystal structure models deposited in the Protein Data Bank (PDB) contradicts the fact that, for proteins crystallized from aqueous media, water molecules are always expected to bind to the protein surface, as well as to some sites in the protein interior. An analysis of the contents of the PDB indicated that the expected ratio of the number of water molecules to the number of amino-acid residues exceeds 1.5 in atomic resolution structures, decreasing to 0.25 at around 2.5 Å resolution. Nevertheless, almost 800 protein crystal structures determined at a resolution of 2.5 Å or higher are found in the current release of the PDB without any water molecules, whereas some other depositions have unusually low or high occupancies of modeled solvent. Detailed analysis of these depositions revealed that the lack of solvent molecules might be an indication of problems with either the diffraction data, the refinement protocol, the deposition process or a combination of these factors. It is postulated that problems with solvent structure should be flagged by the PDB and addressed by the depositors.
Navigating remote work: the role of corporate social responsibility in boosting employee engagement
Authors: Núñez-Sánchez José M. , Molina-Gómez Jesús , Mercadé-Melé Pere , Fernández-Miguélez Sergio 
Published: October 2024

PurposeThis paper investigates the relationship between teleworkers' perceptions of corporate social responsibility (CSR) and employee engagement (EE) in remote work.Design/methodology/approachA quantitative research approach was used, involving a questionnaire distributed via convenience sampling. Data from 205 valid responses from teleworking employees in Spain were analysed using structural equation modelling to test the hypothesis regarding the association between CSR and EE.FindingsThe study found that CSR’s social and environmental dimensions positively impact EE among teleworkers. However, the economic dimension of CSR only partially influences EE in a telework setting.Practical implicationsThe findings suggest organisations can enhance EE during telework periods by focusing on social and environmental CSR initiatives. This approach can mitigate the reduced EE associated with remote work, improving organisational performance, productivity, satisfaction and employee well-being.Originality/valueThis study provides empirical evidence on the positive effects of CSR’s social and environmental dimensions on EE in a telework context, offering valuable insights for organisations navigating the post-pandemic landscape. Also, specific CSR strategies can establish a competitive advantage by fostering a motivated and engaged remote workforce.
Understanding the consumer purchase behaviour towards green electronic products: using insight from the theory of planned behaviour
Authors: Rukhsar  , Yameen Mohd , Khanam Zeba 
Published: October 2024

PurposeThis research investigation aims to explore the factors that affect purchasing behaviour among consumers in India in the context of green electronic products with the aid of the extended theory of planned behaviour (TPB) by incorporating two additional constructs, namely environmental concern and ethical obligation.Design/methodology/approachThe current research adopted a quantitative methodology, utilising a survey (questionnaire) to gather data from respondents residing in Delhi-NCR, India. A convenience sampling technique was used to select these respondents. Both online and offline modes were used to collect the data. Moreover, to evaluate the theoretical foundation of the investigation, the researchers employed PLS-SEM (partial least square structural equation modelling) on 346 useable samples.FindingsThe outcome reveals that attitude, subjective norm and perceived behaviour control (PBC) are significant predictors, supplementary constructs such as environmental concern are not significant predictors, whereas ethical obligation is a substantial predictor of purchase intention. Consumer purchase behaviour, in turn, is influenced by consumer purchase intention.Practical implicationsThe outcome of this research could help the country’s legislators formulate policies and programs related to current environmental problems faced by our planet. Marketers could understand the factors that drive consumers' purchasing behaviour towards green electronic products and design effective marketing strategies accordingly. Thus, by enhancing the company’s green image, marketers of green products may potentially increase future purchases, all of which contribute to solving worldwide environmental problems.Originality/valueThis research confirms the usefulness of TPB in understanding Indian consumers' purchasing intention and behaviour towards green electronic products. It further extends the TPB by showing that new components, environmental concerns and ethical obligations influence Indian consumers' purchasing intentions and behaviour. Moreover, prior studies mostly used both additional constructs for green products. Current research used specific types of green products, i.e. green electronic products, as very few studies are available on these products that apply TPB, which makes this study novel. In contrast to previous research that primarily examined purchase intention, this study takes a further step by investigating the connection between intentions and consumers' purchase behaviour. It establishes intention as a precursor to behaviour, specifically towards green electronic products. Additionally, this study introduces new constructs and explores the Indian context, significantly contributing to the existing literature.
Redefining global entrepreneurship: shifting focus from China to Central and Eastern Europe
Authors: Vaduva Sebastian , Brouthers Lance , Benchis Melisa , Nedelcut Amalia Cristina 
Published: October 2024

Purpose
The purpose of this paper is to explore the viability of shifting foreign direct investment (FDI) from China to Central and Eastern European (CEE) countries in light of recent geopolitical and economic challenges. By analyzing case studies, it argues that CEE nations offer a compelling alternative for Western European businesses, with stronger intellectual property protection, political stability and alignment with European Union (EU) sustainability goals. The paper provides insights for firms and policymakers on mitigating risks and enhancing business operations by pivoting toward the CEE region, offering practical recommendations for adapting to shifting global trade dynamics.

Design/methodology/approach
The design methodology uses the case study approach to analyze the shift of FDI from China to CEE. This method examines the geopolitical, economic and legal contexts influencing business decisions, using real-world examples of Western European companies that have made this transition. The case studies highlight key factors in decision-making and the benefits of relocating investments to the CEE region.

Findings
The study identifies several advantages of the CEE region over China for Western European firms. These include geographic proximity, similarities in business values and purposes, environmental accountability, trustworthiness in business, enforceable noncompetition rules, lower risks of counterfeiting, reduced political and administrative risks, lower risks of intellectual property theft and reduced risks of negative publicity.

Practical implications
The findings suggest that Western European firms should consider redirecting their FDI to the CEE region to mitigate risks associated with investing in China. This move could offer long-term benefits despite short-term complications.

Originality/value
This paper contributes to the FDI theoretical framework by enhancing the cultural, administrative, geographic and economic (CAGE) distance framework. It provides a unique perspective on the shifting dynamics between Europe and China and highlights the potential of the CEE region as a viable alternative for FDI.
Structure‐based virtual screening and drug repurposing studies indicate potential inhibitors of bovine papillomavirus E6 oncoprotein
Authors: de Oliveira Santos Lucas Alexandre Barbosa , Batista Marcus Vinicius de Aragão 
Published: October 2024

AbstractBovine papillomavirus type 1 (BPV1) is an oncogenic virus that causes lesions and cancer in infected cattle. Despite being one of the most studied genotypes in the family and occurring in herds worldwide, there are currently no vaccines or drugs for its control. The viral E6 oncoprotein plays a crucial role in infection by this virus, making it a promising target for the development of new therapies. In this regard, we integrated structure‐based virtual screening approaches, drug repositioning, and molecular dynamics to identify approved drugs with the potential to inhibit BPV1 E6. Our results reveal that Lumacaftor and MK‐3207 are promising candidates for controlling BPV1 infection. The findings of this study may contribute to the development of E6 oncoprotein blockers in an accelerated and cost‐effective manner.
Mangrove freeze resistance and resilience across a tropical‐temperate transitional zone
Authors: Kang Yiyang , Kaplan David A. , Osland Michael J. 
Published: October 2024

Abstract

Freeze events govern the distribution and structure of mangrove ecosystems, especially in tropical‐temperate transitional zones. Understanding mangrove responses to freezing is crucial for predicting their poleward expansion under climate change. However, there is a need for field‐based measurements of mangrove freeze resistance and resilience.

After an extreme winter storm in December 2022, we measured mangrove post‐freeze damage and recovery (January and November 2023), building on a pre‐freeze baseline assessment conducted in July 2022 across 12 sites along the temperature gradient of Florida's Gulf of Mexico coast (USA).

Low‐temperature thresholds for leaf damage to Avicennia germinans, Rhizophora mangle and Laguncularia racemosa were quantified near −6, −4 and − 4°C, respectively. Thresholds for mortality were found to be near −6 to −7°C for A. germinans and −4 to −5°C for R. mangle. A threshold for loss of reproductivity in A. germinans was identified near −6 to −7°C. Resprouting was observed in all three species but limited to just one individual for R. mangle. Surviving A. germinans resprouted vigorously and had the greatest number of resprout branches, which was proportional to leaf damage. Tall A. germinans had a higher resprout percentage than short trees.

Strata‐specific differences in freeze damage were most pronounced for R. mangle, with higher damage in tall versus short trees, while no difference was found between A. germinans strata. These results suggest that R. mangle population recovery may depend on the growth of short trees, while A. germinans can recover from all strata.

Minimum air temperature was strongly correlated with mangrove height and above‐ground biomass. Projections of future minimum temperature and species‐specific freeze degree days predict warming winters, suggesting further mangrove development and range expansion under climate change.

Synthesis: Collectively, our study advances understanding of mangrove responses to freezing and identifies low‐temperature thresholds for each species, aiding predictions of mangrove range expansion.
Linking individualistic growth stability of trees to the complexity of understorey layers
Authors: Zheng Jiacheng , Lyu Lixin , Zhong Yuan , Yang Jing , Qiu Hongyan , Zhang Qi‐Bin 
Published: October 2024

Abstract

Tree‐growth stability is crucial in upholding forest ecosystem services. Despite extensive research on the correlation between tree growth and climate, the influence of forest understorey on tree‐growth stability remains understudied.

We surveyed forest plots and collected tree‐ring samples along two elevational gradients, ranging from 3600 to 4400 m a.s.l., in the southeastern Tibetan Plateau. An index was developed to quantify individualistic growth stability of trees, and its linkage with the complexity of forest understorey structure was examined.

We found that tree‐growth stability is more pronounced in complex forest communities. In forests with higher understorey complexity, the proportion of trees experiencing growth release increased during wet years, while those with growth suppression augmented during dry years. Interestingly, a subset of trees exhibits abnormal growth increases even during the driest years, whereas another subset shows abnormal growth reductions during the wettest years. Furthermore, forests with more complex understorey structures exhibited a higher proportion of trees showcasing these two types of ‘anti‐phase’ growth statuses.

Synthesis. Our study underscores the linkage between individualistic growth stability of trees and the complexity of understorey structures. The growth stability of the overstorey layer is conveyed at the expense of individual‐level growth stability and synchrony in forests with complex understorey structures. These findings emphasize the necessity for attention to the interplay between tree growth and understorey community structures when assessing the impacts of future climate change on forest dynamics.
The recent progress of γδ T cells and its targeted therapies in rheumatoid arthritis
Authors: Feng Xue , Xu Yan 
Published: October 2024

AbstractRheumatoid arthritis (RA) is an autoimmune condition that mostly impacts the joints. During the advanced phases of the disorder, it may be accompanied by other problems. While the precise cause of RA is uncertain, various research has been conducted to gain a better understanding of the immunological processes involved in the development of RA. T cells are acknowledged as significant contributors to the progression of RA because of their roles in cytokine secretion, antigen presentation, and facilitating B cells in the manufacture of antibodies. γδ T cells are a small subset of T cells that have significant functions in the context of infection and diseases linked with tumors. γδ T cells have been the subject of investigation in autoimmune disorders in recent years. This review focused on the involvement of γδ T lymphocytes in the development of RA. In this article, we provide an analysis of the immunological capabilities of γδ T cells, intending to comprehend their significance in RA, which could be pivotal in the creation of innovative clinical treatments.
Nutrient limitation shortly before harvest promotes high accumulation of antioxidants in lettuce
Authors: Holzgreve Hannah , Weiß Alena , Scholz Caterina , Stöhr Christine 
Published: October 2024

AbstractPlants exposed to drought not only have to cope with a shortage of water, but also with a simultaneous decrease in nutrient availability. In this greenhouse experiment, the responses of antioxidants and key metabolites to 2 or 4 days of water limitation immediately prior to harvest were compared to the effect of nutrient limitation with continued water supply in lettuce leaves. Water limitation led to a faster increase in stress intensity than nutrient limitation. While moderate drought stress led to a slight increase in the antioxidant compounds studied, there was a concomitant sharp decrease in starch content. Under nutrient limitation, an increase in the content of ascorbic acid, the proportion of reduced ascorbic acid and the content of phenolic compounds, flavonoids, soluble sugars and starch was observed in the mild phase of stress. These results suggest that reducing nutrient availability shortly before harvest could be a suitable means of improving the nutritional value of crops through cultivation practices as opposed to breeding.
Differential production of mitochondrial reactive oxygen species between mouse (Mus musculus) and crucian carp (Carassius carassius)
Authors: Gerber Lucie , Torp May‐Kristin , Nilsson Göran E. , Lefevre Sjannie , Stensløkken Kåre‐Olav 
Published: October 2024

AbstractAimIn most vertebrates, oxygen deprivation and subsequent re‐oxygenation are associated with mitochondrial impairment and excess production of reactive oxygen species (ROS) like hydrogen peroxide (H2O2). This in turn triggers a cascade of cell‐damaging events in a temperature‐dependent manner. The crucian carp (Carassius carassius) is one of few vertebrates that survives months without oxygen at cold temperatures and overcomes oxidative damage during re‐oxygenation periods. Mitochondria of this anoxia‐tolerant species therefore serve as an excellent model in translational research to study adaptation and resilience to low oxygen conditions and thermal variability.MethodsHere, we used high‐resolution respirometry on isolated mitochondria from hearts of crucian carp and the anoxia‐intolerant mouse (Mus musculus), at 37 and 8°C; two temperatures relevant for transplantation medicine (i.e., graft preservation and subsequent rewarming).ResultsWe find: (1) a striking difference in H2O2 release between the two species at 37°C despite comparable mitochondrial efficiency and capacity, (2) a massive H2O2 release after inhibition of complex V in mouse at 37°C that is absent in crucian carp, and prevented in mouse by incubation at 8°C or uncoupling with a protonophore at 37°C, and (3) indications that differences in mitochondrial complex I and II capacity and thermal sensitivity influence the release of mitochondrial H2O2 relative to respiration.ConclusionOur findings provide comparative insights into a spectrum of mitochondrial adaptations in vertebrates and the importance of thermal variability. Furthermore, the species‐ and temperature‐related changes associated with mitochondria highlighted in this study may help identify mitochondria‐based targets for translational medicine.
From colonial time to decolonial temporalities
Authors: Maphosa Thabolwethu Tema , Makama Refiloe 
Published: October 2024

AbstractIn this paper, we critique the colonial conception of time and present alternative decolonial temporalities. We propose that the colonial conception of time, which is linear and scarcity centred, is limiting when it comes to the possibility of contextually theorizing trauma and healing. We offer two main arguments. The first argument explores the discourse around the Truth and Reconciliation Commission (TRC) in South Africa. Focusing specifically on Winnie Madikizela and F. W De Klerk, we show that in their engagement with the TRC, the linear, scarcity‐centred and gendered nature of colonial time was animated. The second argument extends the first argument by considering how temporality is ‘captured’ by colonialism to foreground and universalize Western subjectivities and sensibilities. We use what Derek Hook calls a psycho‐societal‐diagnostic framework in conjunction with Fanon to show how subjectivities are structured in post‐apartheid South Africa. We then consider how this time–subjectivity relationship is enacted at a geopolitical level. The paper ends by considering decolonial temporalities as a way to ‘re‐cognize’ at a collective level. While the paper engages with a series of concepts and ideas, namely capitalism, politics of justice, gender and race, these are threaded by the concept of time.