bluuebunny/crossref_metadata_2025_split huggingface dataset:
A biophysical model of synaptic tagging-and-capture based on actin dynamics
Authors: Negri Francesco , Luboeinski Jannik , Tetzlaff Christian , Fauth Michael 
Published: February 2025

AbstractAccording to the synaptic tagging-and-capture hypothesis, long-lasting (late-phase) plasticity requires the synthesis of plasticity-related proteins and the setting of a synaptic tag at the stimulated synapse. It has been hypothesized that this tag is implemented by the complex interplay between dendritic spine geometry and the scaffolding protein actin.To test this, we propose a biophysically-grounded model of late-phase synaptic plasticity considering dynamic and stable actin pools and the size of the PSD in the synapse. In our model, the tag corresponds to the imbalance between the spine volume determined by actin and the volume that would be expected for the current PSD size.We demonstrate the viability of the proposed model by showing that it can account for the experimentally observed synaptic plasticity induced by stimulation of a single synapse, as well as tag-resetting protocols, and heterosynaptic plasticity protocols involving two synapses.Moreover, for the interaction of two consecutive stimuli at the same synapse within around up to an hour, plastic changes stack non-linearly, reminiscent of the spacing effect found in learning and memory studies.In summary, our model both matches experiments and extrapolates well to a wide range of stimulation protocols. Thus, it will be ideally suited to serve as a basis to predict the plasticity effects emerging from the complex activity patterns in recurrent networks.
Congruent neuronal modulation across competing actions challenges the role of the substantia nigra in action selection
Authors: Hou Lingfeng , Grijalva Torres Sofia , Svedberg Daniel , Assad John 
Published: February 2025

AbstractThe basal ganglia are involved in the control of movement, but their exact role is unclear. Paradoxically, most of the inhibitory projection neurons in the main output nuclei increase firing around the time of movement; only a small fraction decrease firing. This antagonistic activity pattern could subserve action selection, with the small “decrease” population selectively disinhibiting the desired movement, and the larger “increase” population inhibiting competing movements. The action-selection hypothesis makes an implicit assumption: neurons that decrease firing to disinhibit a specific action should increase firing to inhibit that action when a different action is desired. To test this hypothesis, we recorded projection neurons in the substantia nigra pars reticulata (SNr) of mice trained to alternate between two different types of movements. Many SNr neurons showed a “ramping” pattern of pre-movement firing-rate modulation, with most neurons increasing firing, consistent with previous findings. However, contrary to the action-selection model, the overwhelming majority of SNr neurons exhibited congruent modulation between the competing actions, either increasing or decreasing their firing rates for both actions; only a small fraction of neurons exhibited opposite signs of modulation. We could not ascribe the congruent modulation to potential uninstructed movements. Our results are not easily reconciled with simple antagonistic mechanisms for action selection in the basal ganglia output nuclei. We also found that ramping activity in SNr neurons typically began hundreds of ms before self-timed and spontaneous movements, in contrast to previous findings suggesting that basal ganglia output is modulated too late to be involved in movement initiation. Our findings suggest constraints – and raise new questions – about the role of the basal ganglia in movement initiation and action selection.
Axion minicluster halo limits from wide binary disruption
Authors: Wang Zihang , Gao Yu 
Published: February 2025

Axionic dark matter can form miniclusters and minicluster halos (MCHs) from inhomogeneities in the early Universe. If MCHs are sufficiently massive, then their existence can be revealed by small-scale gravitational tidal perturbation to halolike wide binary star systems in the Galaxy. The observed population of the Milky Way’s wide-separation binaries with a≳0.1 parsec offer a sensitive test to dynamic evaporation from MCHs. Considering data from recent GAIA observations, we derive significant constraints on the MCH fraction of the Galactic dark matter halo. For several scenarios including dense MCHs and isolated minicluster models, these limits will apply to axionlike particles in the mass range ma∼10−15–10−12  eV and ma∼10−19–10−16  eV, respectively.

Published by the American Physical Society
2025
Confronting cold new early dark energy and its equation of state with updated CMB, supernovae, and BAO data
Authors: Chatrchyan Aleksandr , Niedermann Florian , Poulin Vivian , Sloth Martin S. 
Published: February 2025

Cold new early dark energy (cold NEDE) addresses the Hubble tension through a triggered vacuum phase transition in the dark sector. In this paper, we constrain a phenomenological fluid model using recent cosmic microwave background likelihoods based on Planck NPIPE data alongside baryonic acoustic oscillations (BAO) and supernovae data from Pantheon+. Exploiting the enhanced constraining power of the datasets, we introduce and study an extended version of the NEDE fluid model in which the equation of state parameter wNEDE, characterizing the fluid after the phase transition, is allowed to evolve with nonvanishing derivatives dwNEDE/dlna and d2wNEDE/d(lna)2. Our results indicate that data is compatible with a rather simple time dependence that could arise from a mixture of radiation and a stiff fluid. With the updated datasets, the base and extended models still show a significant reduction of the difference of the maximum tension from 6.3σ in ΛCDM down to 3.5σ with a small simultaneous reduction of the S8 tension, slightly improving over recent findings for the axionlike early dark energy model. Finally, we also provide a first test of the model against new BAO data from the dark energy spectroscopic instrument survey. Replacing the previous BAO constraints in our analysis with the new ones, the tension is further reduced to 2.6σ, reaffirming the cold NEDE model as a promising solution to the Hubble tension.

Published by the American Physical Society
2025
Governance beyond borders: exploring executive overconfidence and firm performance using meta-analysis
Authors: Agarwal Promila , Edacherian Saneesh , Karna Amit , Kaur Ashneet , Maheshwari Sudhanshu 
Published: February 2025

PurposeThis study examines the complex relationship between executive overconfidence and firm performance, highlighting the moderating role of country-level factors. By conducting a meta-analysis of 116 independent effect sizes from global studies, this research aims to clarify the ambiguous effects of executive overconfidence, emphasizing the significance of national contexts.Design/methodology/approachUtilizing a cross-national meta-analytic framework, this study evaluates how variations in governance, board efficacy and shareholder protection across countries influence the impact of executive overconfidence on firm performance.FindingsResults reveal that the relationship between executive overconfidence and performance is significantly shaped by country-level factors, suggesting a need to consider contextual influences alongside traditional trait-focused perspectives and underscoring the importance of contextual influences.Practical implicationsThe findings suggest that organizations should incorporate national-level contextual factors in their governance structures to better manage the risks associated with executive overconfidence.Originality/valueThis study advances the literature by providing a comprehensive analysis of how country-specific variables modulate the effects of executive overconfidence on firm outcomes. It offers new insights into the role of situational factors in executive behavior, contributing to a more nuanced understanding of leadership and organizational performance.
A novel damping discrete grey model with time-polynomial term for forecasting monthly natural gas consumption
Authors: Zhao Ying , Zhang Tao , Xu Jie , Yang Jie , Wu Wen-Ze 
Published: February 2025

PurposeThis study aims to design a novel seasonal discrete grey model for forecasting monthly natural gas consumption by incorporating damping accumulation and time-polynomial term.Design/methodology/approachConsidering the principle of new information priority and nonlinear patterns in the original series of monthly natural gas consumption, we establish a novel discrete seasonal grey model by adding the damping accumulation and time-polynomial term into the existing model. In addition, the order of damping accumulation and the coefficient of time-power term can be determined by the moth flame optimization (MFO) algorithm.FindingsThe empirical cases show that the proposed model has a better prediction performance when compared with other benchmark models, including six seasonal grey models, one statistical model and one artificial intelligent model. Based on forecasts, the proposed model can be considered a promising tool for monthly natural gas consumption (NGC) in US.Originality/valueBy combining the damping accumulation and the time-polynomial term, a new discrete seasonal grey model for improving the prediction performance of the existing grey model is proposed. The properties of the proposed model are given, and the newly-designed model is initially applied to predict monthly NGC in US.
The adaptive capacity of the tourism sector to volcanic eruption and the COVID-19 pandemic: the case of Yogyakarta, Indonesia
Authors: Ningsih Reni Diah , Ariyaningsih  , Shaw Rajib 
Published: February 2025

Purpose
Tourism is a vulnerable industry easily influenced by safety and security challenges such as violence, health issues and natural disasters. To quickly recover from negative impacts in the tourism sector, the industry must adapt to changes and cope with extreme conditions. In this regard, the purpose of this paper is to understand the factors influencing the tourism industry’s adaptive capacity to volcanic eruptions and the COVID-19 pandemic.

Design/methodology/approach
Using binary logistic regression, a quantitative approach was used to answer the research question regarding the adaptive capacity against the eruption and the COVID-19 pandemic. Furthermore, a semiqualitative method was used to identify the tourism industry’s coping strategy in dealing with the eruption and the COVID-19 pandemic.

Findings
According to the research findings, the tourism industry was more affected by the COVID-19 pandemic than by the eruption. In addition, various determinant factors have influenced the adaptive ability to the eruption and the COVID-19 pandemic, and this study offers successful strategies for improving adaptive capacity and enhancing resilience. Finally, this study indicates that to deal with current issues, multi-hazard risk assessments should be integrated with adaptive capacity hazard type elements to reduce future disaster risks and improve tourism business capacity.

Originality/value
The tourism industry is the most important economic pillar in developing countries. If disasters are not adequately understood, they have the potential to halt the tourism industry. However, no research has been conducted to examine the adaptive capacity of the tourism sector in disasters, especially in volcanic eruptions and the COVID-19 pandemic.
Could entrepreneurial leadership promote employees’ IWB? The roles of intrinsic motivation, creative self-efficacy and firms’ innovation climate
Authors: Alshahrani Mohammed Awad , Yaqub Muhammad Zafar , Ali Murad , El Hakimi Imane , Salam Mohammad Asif 
Published: February 2025

Purpose
Building on social cognitive theory and self-determination theory, this study aims to discern the innovative work behaviors of organizational employees as the process by which they generate, develop and implement new and valuable ideas, practices, products or procedures shaped by entrepreneurial leadership by reinforcing intrinsic motivation and creative self-efficacy under the boundary condition of a firm’s innovative climate.

Design/methodology/approach
This study used partial least squares-based structural equation modeling on a sample of 203 employees of small and medium-sized enterprises operating in Saudi Arabia.

Findings
This study found that entrepreneurial leadership improves employees’ innovative work behavior by successively enhancing their intrinsic motivation and creative self-efficacy. Furthermore, the analysis confirmed that a firm’s innovative climate significantly moderates the strength of the indirect mediation effect between entrepreneurial leadership and employees’ innovative work behavior through sequential mediation.

Practical implications
The findings of this study yield substantial theoretical and practical implications resulting from a fine-grained understanding of the instrumentality of entrepreneurial leadership in fostering employees’ innovative work behavior. Effectively orchestrating these psychological mechanisms could enable entrepreneurial leaders to alleviate their behaviors.

Originality/value
This is an original study that outlines the importance of aligning entrepreneurial leadership and an innovative climate to shape intrinsic motivation and creative self-efficacy in employees’ innovative work behavior. It demonstrates how entrepreneurial leadership enhances innovative work behavior through the sequential mediation of intrinsic motivation and creative self-efficacy under the boundary condition of an innovative climate.
The effect of expatriates’ role conflict on their desire to terminate an international assignment and venture performance: comparing wholly owned subsidiaries with international joint ventures
Authors: Gehrisch Marius Gabriel , Klingenberg Ingo , Süß Stefan 
Published: February 2025

PurposeCompared to wholly owned subsidiaries (WOSs), certain international organizational forms such as international joint ventures (IJVs) often fail. Moreover, associated expatriations to these organizational forms also regularly fail, which contributes to or exacerbates the problem described above. To address this issue, this article aims to investigate the effect of expatriates’ role conflict on their desire to terminate an international assignment and on venture performance, measured as managerial satisfaction, by comparing expatriates who are delegated to an WOS with expatriates who are delegated to an IJV.Design/methodology/approachDrawing on role theory, a vignette-based experimental study was conducted with role conflict and organizational form as experimental variables. After conducting two pilot studies, data were gathered by means of an online questionnaire targeting organizational assigned expatriates (AE) for the main study.FindingsThe results indicate that role conflict negatively influences managerial satisfaction with venture performance, but has no effect on expatriates’ desire to terminate an international assignment and show no moderating effect of the organizational form. Additionally, we found a significant direct effect of organizational form on managerial satisfaction with venture performance. Hence, participants were less satisfied with IJVs compared to WOSs.Originality/valueStudies in international business research lack experimental investigations. This article addresses this deficiency for the presented topic by applying a vignette-based experimental approach, thereby drawing causal inferences. Moreover, we extend role theory to the context of IJVs and contribute to organization research, as this article is the first to make a comparison between WOSs and IJVs for the context of role conflict. Fertile opportunities for future re-search are also provided.
Italian Gen Z and sustainable coastal tourism: a segmentation analysis of knowledge, attitudes and pro-environmental behaviours
Authors: Forleo Maria Bonaventura , Bredice Marilena 
Published: February 2025

PurposeCoastal and marine tourism (CMT) is facing environmental challenges that may prove critical in the near future. A shift towards sustainable approaches is required. Investigating the approach of today’s youth, who represent an important segment of the general and tourist populations, can foster this change. The aim of this study is to investigate the knowledge, opinions, attitudes and behaviour among the Italian Gen Z in relation to coastal and marine environments and the sustainability of CMT and to perform a segmentation of young people’s profiles.Design/methodology/approachA survey of 778 students was performed. Descriptive statistics, tests and cluster analyses were applied.FindingsTwo-thirds of the participants are convinced that tourism activities may interfere with the protection of marine and coastal environments. Likewise, they are largely convinced that the quality of these environments could affect tourism. The respondents’ environmental behaviour is mainly related to the issues of litter and single-use plastics. Gender and area of residence significantly affect the respondents’ knowledge of marine sustainability topics, some of their behavioural attitudes and their future perspectives. The educational field is significant for many phenomena. The cluster analysis detected five groups, ranging from a distant profile to one more interested in sustainable marine tourism whose members are involved and have a strong environmental attitude.Originality/valueThe study gives an original contribution to the literature on generational cohorts and young people’s perspectives on future scenarios of sustainable coastal and marine tourism.
Leading and managing inclusive entrepreneurial ecosystems
Authors: Bendickson Joshua S. , Stewart Geoffrey T. , Cowden Birton , Lanier Patricia A. , Johnson Sydnee I. 
Published: February 2025

PurposeThe purpose of this article is to discuss methods for leading and managing inclusive entrepreneurial ecosystems (IEEs) that encourage inclusion and participation from underrepresented portions of their community for entrepreneurship ecosystems to represent and help all types of entrepreneurs in their region.Design/methodology/approachThis article uses an in-depth interview method for data collection.FindingsOur findings present challenges and opportunities in striving to have more inclusive entrepreneurial ecosystems (IEEs) by empathizing with different populations and co-creating new and novel programs to meet needs.Practical implicationsEE leaders should follow suit with entrepreneurs and utilize the customer discovery and design thinking processes to design resources and programming that reach the various needs of entrepreneurs from all backgrounds. This process should be co-created with stakeholders to allow those communities to have ownership in the final product.Originality/valueThis article takes a pracademic approach using both interviews and academic research to determine methods for fostering IEEs.
Social collective organizing: a dynamic capability for the social resilience of a territory
Authors: D’Antone Simona , Crespin-Mazet Florence , Goglio Karine , Fuschillo Gregorio 
Published: February 2025

PurposeThis research aims to explore how emergent social collectives contribute to the social resilience of their territory by enacting dynamic capabilities (DCs) to face persistent social adversities untapped by local governments.Design/methodology/approachWe comparatively analyze two social collectives which emerged to tackle food poverty in Italy (Spesasospesa.org) and cardiac arrest in France (30 min to save lives). Through an abductive research approach, we search DCs allowing social collectives and their founders to mobilize territorial capabilities and self-organize.FindingsThe DCs enabling social collective organizing for the social resilience of territories are: (1) interpreting an external trigger as an opportunity to address persistent social adversities (sensing); (2) mobilizing various territorial capabilities to ideate and implement a solution (seizing); (3) reconfiguring DCs to further deploy and adapt the solution to new domains and geographical areas; and (4) enacting overarching individual and organizational boundary spanning capabilities.Originality/valueThis research outlines social resilience as a DC in social mission-driven organizations rather than within firms, focuses on emergent and heterogeneous social groups and on long-term adversities affecting a territory. Its main contributions highlight: (1) how triggering events impact social collectives’ emergence and resilience capabilities mobilization; (2) how social collective self-organizing and DCs contribute to the social resilience of a territory; (3) how the pair of founders sense an opportunity and activate collective capabilities for social resilience; (4) the crucial role of boundary spanning capabilities; and (5) how territorial characteristics influence the resilient capabilities mobilized.
Digital entrepreneurial enterprises: the evolution of organizational structure
Authors: Cai Ting , Yang Bin , He Jiandu 
Published: February 2025

PurposeOn the premise of verifying whether the platformization organization of DEEs is born, this work aims to explore the evolutionary process of the organizational structure of digital entrepreneurial enterprises (DEEs) and to further reveal the drivers of organizational structure evolution from the perspective of data resources.Design/methodology/approachThe authors use a longitudinal two-case approach to analyze rich archival and interview data from two DEEs in China.FindingsThe findings reveal that the organizational structure of DEEs evolves from hierarchy, network and flatlization to platformization, that the drivers of evolution include building data flow channels, removing barriers of data flow and forming data rules. Meanwhile, the coordination devices in this process have gradually evolved from hierarchy to standard operating procedures, shared culture, norms, etc. to achieve a balance between commercial and creative success.Originality/valueThis work develops a framework for the evolution of organizational structure of DEEs from organization design theory lens and provide some management insights into the development of DEEs.