bluuebunny/crossref_metadata_2025_split huggingface dataset:
Neural coding of choice and outcome are modulated by uncertainty in orbitofrontal but not secondary motor cortex
Authors: Romero-Sosa Juan Luis , Yeghikian Alex , Wikenheiser Andrew M. , Blair Hugh T. , Izquierdo Alicia 
Published: November 2024

AbstractOrbitofrontal cortex (OFC) and secondary motor cortex (M2) are both implicated in flexible reward learning but the conditions that differentially recruit these regions are not fully understood. We imaged calcium activity from single neurons in OFC or M2 duringde novolearning of uncertain reward probability schedules. Predictions of choice were decoded from M2 neurons with high accuracy under all certainty conditions, but were more accurately decoded from OFC neurons under greater uncertainty. In M2, the proportion of outcome-selective neurons decreased with uncertainty whereas this proportion remained stable in OFC, due to an increased recruitment of reward-selective neurons across levels of uncertainty. Decoding accuracy of both choice and outcome were predicted by indices of flexible strategy like Win-Stay and Lose-Shift in OFC, but not M2. When schedules were experienced in increasing and then decreasing uncertainty, chemogenetic perturbation of M2 and OFC neurons resulted in opposing roles in certain and uncertain conditions, respectively. Our results indicate that M2 neurons are causally involved in learning of more certain conditions, whereas OFC neurons preferentially encode choices and outcomes that foster greater reliance on adaptive strategies under conditions of uncertainty. This reveals a novel functional heterogeneity within frontal cortex in support of flexible learning.
Concept image framework for derivatives from contour graphs
Authors: Emigh Paul J. , Manogue Corinne A. 
Published: November 2024

Physics experts and students commonly use a variety of representations when working with partial derivatives, including symbols, graphs, and words. One especially powerful representation is the contour graph. In open-ended problem-solving interviews with nine upper-division physics students, we asked students to determine derivatives from contour graphs with electrostatic and thermodynamic contexts. Students undertook three overarching actions: (i) orienting to the given graph, (ii) finding one or more derivatives, and (iii) reflecting on the task. In general, students tended to have more difficulty with the thermodynamic task than the electrostatic one. Students made use of a variety of representational features throughout the interviews, namely by annotating the provided contour graphs in ways that highlighted what is held constant. We use these results to generalize the existing concept image framework for ordinary derivatives to create a framework useful for understanding student ideas about multivariable derivatives. In particular, we add a new layer to the framework—the layer—that calls attention to how students do or do not attend to which variables are changing (or remaining constant) when finding a derivative. We view the change layer as a powerful central idea for both further research and the development of instructional tasks for physics students.

Published by the American Physical Society
2024
Lifted TASEP: A Solvable Paradigm for Speeding up Many-Particle Markov Chains
Authors: Essler Fabian H. L. , Krauth Werner 
Published: November 2024

Virtually all Markov-chain Monte Carlo algorithms used for sampling a given distribution are reversible, and they satisfy the detailed-balance condition. For local chains, this leads to a slow, diffusive exploration of sample space. Significant speedups can be achieved through nonreversible algorithms with the given distribution as a targeted steady state. However, nonreversible algorithms for sampling are difficult to set up and to analyze, and exact speedup results for interacting many-particle systems are very rare. Here, we introduce the “lifted” totally asymmetric simple exclusion process (TASEP) as an exactly solvable paradigm for nonreversible many-particle Markov chains. It samples the same hard-sphere distribution as the Metropolis algorithm for symmetrically diffusing hard-core particles on a one-dimensional lattice. We solve the lifted TASEP by an unusual kind of coordinate Bethe ansatz and show that it exhibits polynomial (in particle number) speedups in the relaxation time for the asymptotic approach of the steady state, as well as the nonasymptotic mixing time, compared to both Metropolis and Kardar-Parisi-Zhang-based dynamics. The lifted TASEP is the reduction onto the one-dimensional lattice of the successful hard-sphere event-chain Monte Carlo algorithm, and we discuss that it can likewise be generalized to soft interaction potentials.

Published by the American Physical Society
2024
Self-created or collaborative? The effects of virtual influencers' identity type and post type on purchase intentions
Authors: Jiang Kan , Zhou Dailan , Bao Xiaoning , Mo Silan 
Published: November 2024

PurposeConsidering that when endorsing the same product, virtual influencers with different identity types (self-created, collaborative) can have different impacts on consumers' purchasing behaviors, this paper aims to explore how to maximize the impact effects of the VIs' respective identities. It provides companies with new perspectives on endorsement strategies.Design/methodology/approachThe interaction between VI identity type and post type (informational, storytelling) on purchase intention was analyzed in four experiments (N = 1,007), considering informational and normative social influence as intermediate mechanisms and consumer self-construal as moderators.FindingsThe findings show that self-created VI is suited to informational posts and collaborative VI to storytelling posts. This identity-content match effectively triggers the social influence mechanism: informational posts of self-created VI significantly enhance informational social influence. In contrast, storytelling posts of collaborative VI primarily stimulate normative social influence. Consumer self-construal also moderates the process of influencing mechanisms.Originality/valueBased on social influence theory and matching theory, this paper confirms the existence of an interaction between VI identity types, which influences consumers' purchase intention through informational and normative social influence. This finding fills the research gap in the field of VI endorsement strategy. It also emphasizes the importance of consumer self-construal and contributes new insights into the related field.
Living one’s calling independently: the role of online labor platforms for different dynamics of calling enactment
Authors: Affolter Lorenz , Straub Caroline , Spurk Daniel 
Published: November 2024

PurposeThis study investigates the diverse career experiences of gig workers by looking at a sample of gig workers that are living a calling through online labor platforms (OLPs). Drawing from the systems informed positive psychology (SIPP) framework we examine the experiences and dynamics through which individuals can enact their calling through OLPs.Design/methodology/approachWe conducted 34 semi-structured interviews with gig workers who are able to live their calling through OLPs. The interviews were analyzed by using a grounded theory approach.FindingsOur findings reveal that gig workers sense of living a calling is rooted in the experience of being and feeling independent. Furthermore, we identify three dynamics of calling enactment through OLPs which are: (1) engaging in personal development, (2) constructing social fit and (3) stabilizing finances.Originality/valueWhile many studies document the precarious nature of the gig economy, our paper offers rich insight into positive career experiences of gig workers. Through taking a systemic view on individuals’ ability to live a calling, we illustrate how individuals interact with different features of OLPs to enact their calling. Finally, we suggest that besides direct dynamics of calling enactment there are also indirect dynamics of calling enactment that play an important role in individuals’ ability to live a calling in the gig economy.
Investigating the mediating role of national governance bundles and institutional ownership on the relationship between risk governance disclosure and market valuation: evidence from Sub-Saharan Africa
Authors: Areneke Geofry , Tunyi Abongeh A. , Nakpodia Franklin 
Published: November 2024

Purpose
The paper aims to comparatively examine the impact of risk governance disclosure (RGD) on the market valuation of firms in Sub-Saharan Africa (SSA) and the mediating role of institutional investment and national governance bundles (NGB).

Design/methodology/approach
Using a dynamic system generalized method of moments estimation to control for endogeneity, the data for this research is manually collected from the annual reports of small and large firms in Nigeria (80 firms) and South Africa (100 firms) for the period 2012–2017 (900 firm years).

Findings
The authors find that firm RGD directly impacts firm valuation positively, but this association is significantly mediated by national governance practices (bundles) and institutional investment. The authors also develop a conceptual framework that shows the direct and indirect impact of RGD on firm market valuation.

Originality/value
The paper contributes to the comparative corporate governance literature in three ways. First, the authors show that differences in country-level RGD are explained by the maturation of governance regulations and institutions in each country. Second, despite the differences in the level of maturity of governance institutions across countries, stock markets value risk governance information. Finally, the study develops a conceptual framework that addresses prior inconsistent findings by showing that firm-level NGB and institutional investment significantly mediate the association between RGD and market valuation.
The relation between perceived autonomy support and (in) formal learning when using a PDP: the mediating role of self-direction in learning
Authors: van der Baan Niels , Lejeune Christophe , Beausaert Simon , Raemdonck Isabel 
Published: November 2024

Purpose
To keep up with their changing environment, organizations are investing in continuous skills development of their employees and therefore implement personal development plans (PDPs). However, to be effective, PDPs require employees to show self-direction in learning (SDL). Autonomy-supportive supervisors can foster employees’ SDL. Therefore, the purpose of this cross-sectional study is two-fold. First, this study explores the relationship between perceived autonomy support and learning at the workplace. Second, this study investigates the mediating role of SDL when using a PDP.

Design/methodology/approach
Based on data from a convenience sample from employees in various industries (n = 193), structural equation modelling was used to investigate the relationships between the different variables.

Findings
First, a positive relationship was found between perceived autonomy support and informal learning activities, but not with formal learning activities. Second, results indicated that SDL when using a PDP mediates the relation between perceived autonomy support and both formal and informal learning activities at the workplace. These results suggest that a supervisor who is perceived as autonomy supportive can foster employees’ SDL when using a PDP and, in turn, support learning at the workplace.

Practical implications
Also, these findings indicate that autonomy-supportive supervisors can encourage the undertaking of learning activities by stimulating SDL when using a PDP.

Originality/value
For a PDP to be effective, a degree of SDL is assumed. To the best of the authors’ knowledge, this is the first study to investigate SDL within a PDP setting.
Capabilities toward adoption of outcome-based contracts
Authors: Mittal Sameer , Uski Veli-Matti , Yadav Vinod , Khan Muztoba Ahmad , Kärkkäinen Hannu 
Published: November 2024

PurposeManufacturing enterprises have started to offer the “outcome” derived from machines with the help of outcome-based contracts (OBCs). Offering OBCs leads to benefits such as increased revenues, stronger customer relationships and sustainability. However, implementing OBCs requires critical capabilities. Existing literature has focused on identifying these necessary capabilities, but the prioritization and interrelationships among them remain unexplored. This study aims to address this gap.Design/methodology/approachOur study employs a hybrid analytical hierarchy process and interpretative structural modeling approach to prioritize and map interrelationships among OBC-related capabilities within small and medium-sized enterprises (SMEs).FindingsThe findings highlight the importance of digitalization capabilities such as data privacy and security, remote monitoring, and data analytics; and organizational and governance capabilities, including quantifying, controlling, and monitoring risks, teamwork, and leadership, are highlighted.Research limitations/implicationsWe quantitatively prioritize OBC capabilities and establish their level-wise structural interrelationships, which will facilitate a more effective and efficient implementation of OBCs. Due to the emergent nature of OBCs, our study could identify just one SME case company meeting our selection criteria.Originality/valueExisting OBC literature focusses on the design of OBCs in large companies. Similarly, earlier capability-related OBC literature is oriented toward identifying the OBC capabilities to perform specific functions. However, in the current study, we propose a systematic decision-making approach that comprehensively prioritizes and identifies the interrelationships among the capabilities necessary to provide OBCs, thus complementing the existing scientific literature on OBCs. In addition, we focus on SMEs, that have specific limitations and characteristics.
Does paradoxical leadership predict employee job performance in hospitality? A sequential mediation of harmonious work passion and innovative work behavior
Authors: Madaan Kashish , Jain Divya , Sharma Himani 
Published: November 2024

PurposeDrawing insights from a self-determination perspective, this study aims to investigate the impact of paradoxical leadership (PL) on job performance among hospitality employees. It also explores harmonious work passion (HWP) and innovative work behavior (IWB) as sequential mediators in this direct association.Design/methodology/approachA self-report structured questionnaire was used to collect survey data from 298 employees working in Indian four-, five- and five-star luxury hotels. To test the hypothesized model, partial least squares-structural equation modeling (PLS-SEM) was used.FindingsThis study found PL positively influences HWP, IWB and job performance of hospitality employees. Also, the positive association between PL and employee job performance is significantly mediated by HWP and IWB, individually as well as sequentially.Practical implicationsAdopting PL in hotels can significantly boost employees’ HWP and IWB, resulting in enhanced job performance. This leadership style empowers employees to navigate conflicting demands, fostering creativity and adaptability. Consequently, hotels can benefit from a more engaged workforce, improved service delivery and a competitive edge.Originality/valueThis research adds to the limited literature on PL in the hospitality sector by highlighting its impact on employee behavior and performance outcomes. To the authors’ knowledge, this is the first study to empirically link PL with HWP, IWB and job performance in a sequential mediation model. It uncovers the “black box” of mechanisms connecting PL to work outcomes from emotional and cognitive perspectives.
The impact of the 2012 student fees increase on the mental health of British graduates: a cohort study
Authors: Richardson Thomas , Sood Monica , Large Jack , McCloud Tayla 
Published: November 2024

Purpose
Financial difficulties are associated with poor student mental health, although the 2012 tuition fees increase for British students had little impact on student mental health in the first two years at university. This study aims to examine the mental health of British graduates before and after this fees increase to determine the impact on mental health several years after graduation.

Design/methodology/approach
This study conducted an online cohort study with 327 British students who started university before and after the 2012 fees increase. Participants completed measures of current economic hardship and symptoms of depression, anxiety, stress, general mental health and suicidality. Multiple regression was used to examine the impact of cohort (pre- and post-2012 fees increase), tuition fees amount and economic hardship on mental health.

Findings
Greater economic hardship was positively correlated with all mental health variables. Starting university after the fees increased and/or paying greater fees was associated with increased depression, anxiety, stress and suicidality, with little impact on general mental health. When economic hardship was covaried, the strength of cohort effects reduced but remained significant.

Originality/value
To the best of the authors’ knowledge, this is the first study to show that the 2012 tuition fees increase for British students increased depression, anxiety, stress and suicidality in graduates many years after graduation, owing to additional financial strain.
University entrepreneurship: entrepreneurial orientation, networks, market orientation, and sustainable development
Authors: Pacheco Ana , Ferreira João J. M. , Simões Jorge , Veiga Pedro , Caputo Andrea 
Published: November 2024

PurposeThe literature identifies the need to understand better the role of universities’ entrepreneurial orientation (EO), even while this remains an unexplored field. This study seeks to overcome this shortcoming and put forward empirical evidence on the EO of universities and it examines the moderating effects of networks, knowledge and trust, market orientation, and implementing sustainable development goals (SDGs) on the design and development of entrepreneurial universities.Design/methodology/approachTo test the conceptual model, the authors used a sample of 125 questionnaires obtained from Portuguese higher education institutions, and it was deployed a structural equation model by a partial least squared as the estimation method.FindingsThe results show that the different dimensions of EO significantly influence the design and development of entrepreneurial universities. Furthermore, our findings show how market orientation and SDGs have moderating effects on the development of university entrepreneurship.Practical implicationsAs for practical implications, the results point to the influence EO holds over entrepreneurial universities, and this causal relationship undergoes moderation by networks, knowledge and trust, market orientation and SDGs. As such, HEI rectors, deans and directors need to leverage these moderating effects, fostering human capital and universities’ active initiatives and policies to conceive and develop more entrepreneurial universities.Originality/valueOur research model seeks to contribute to advancing studies on the EO of universities and assists in better understanding EO within the scope of influence of the third university mission as entrepreneurial institutions.
Service robot acceptance: agenda for tourism and hospitality research
Authors: Chen Qiurong , Huang Dan , Miao Mingjie 
Published: November 2024

Purpose
This study aims to provide insights and guidance for future research on service robot acceptance in the tourism and hospitality (T&H) domain through a comprehensive literature review.

Design/methodology/approach
A total of 249 journal articles, retrieved from the Scopus and Web of Science databases, were reviewed using an inductive analysis method.

Findings
Since its emergence in 2008, the topic of robot acceptance has gained significant attention, especially after 2019. The research assesses the current state of research, methodologies used, theoretical foundations and antecedents influencing acceptance. Five categories of antecedents affecting acceptance were systematically identified: robot design factors, individual/organisational factors, situational factors, appraisal factors and affective factors.

Originality/value
This study provides a comprehensive overview of the current landscape of service robot acceptance research. It offers insights and theoretical directions to advance research in the T&H domain.
Plant phenology predicts the stability of primary production in three ecosystems of the northern Chihuahuan Desert
Authors: Hallmark Alesia J. , Collins Scott L. , Litvak Marcy E. , Rudgers Jennifer A. 
Published: November 2024

Abstract

The temporal stability of plant productivity affects species' access to resources, exposure to stressors and strength of interactions with other species in the community, including support to the food web. The magnitude of temporal stability depends on how a species allocates resources among tissues and across phenological stages, such as vegetative growth versus reproduction. Understanding how plant phenological traits correlate with the long‐term stability of plant biomass is particularly important in highly variable ecosystems, such as drylands.

We evaluated whether phenological traits predict the temporal stability of plant species productivity by correlating 18 years of monthly phenology observations with biannual estimates of above‐ground plant biomass for 98 plant species from semi‐arid drylands. We then paired these phenological traits with potential climate drivers to identify abiotic contexts that favour specific phenological strategies among plant species.

Phenological traits predicted the stability of plant species above‐ground biomass. Plant species with longer vegetative phenophases not only had more stable biomass production over time but also failed to fruit in a greater proportion of years, indicating a growth–reproduction trade‐off. Earlier leaf‐out dates, longer fruiting duration and longer time lags between leaf and fruit production also predicted greater temporal stability.

Species with stability‐promoting traits began greening in drier conditions than their unstable counterparts and experienced unexpectedly greater exposure to climate stress, indicated by the wider range of temperatures and precipitation experienced during biologically active periods.

Our results suggest that bet‐hedging strategies that spread resource acquisition and reproduction over long time periods help to stabilize plant species productivity in variable environments, such as drylands.

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