bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhanced Working Memory Representations for Rare Events
Authors: Carrasco Carlos Daniel , Simmons Aaron Matthew , Kiat John E. , Luck Steven J.
Published: March 2024

Rare events (oddballs) produce a variety of enhanced physiological responses relative to frequent events (standards), including the P3b component of the event-related potential (ERP) waveform. Previous research has suggested that the P3b is related to working memory, which implies that working memory representations will be enhanced for rare stimuli. To test this hypothesis, we devised a modified oddball paradigm where a target disk was presented at one of 16 different locations, which were divided into rare and frequent sets. Participants made a binary response on each trial to report whether the target appeared in the rare set or the frequent set. As expected, the P3b was much larger for stimuli appearing at a location within the rare set. We also included occasional probe trials in which the subject reported the exact location of the target. Accuracy was higher for rare than frequent locations. In addition, memory reports on rare trials were more accurate in participants with larger P3b amplitudes on rare trials (although reports were not more accurate for trials with larger P3b amplitudes within participants). We also applied multivariate pattern analysis to the ERP data to “decode” the remembered location of the target. Decoding accuracy was greater for locations within the rare set than for locations within the frequent set. We then replicated and extended our behavioral findings in a follow-up experiment. These behavioral and electrophysiological results demonstrate that although both frequent and rare events are stored in working memory, working memory performance is enhanced for rare oddball events.

Impact Statement

For many decades, researchers have observed that rare events elicit a broad range of physiological responses, and there has been much speculation about the functional significance of these responses. One such response is the P3b component, which is a large voltage deflection in scalp EEG recordings. Over 40 years ago, the P3b was hypothesized to reflect “context updating” (now often called “working memory updating”). However, there has been no direct evidence that working memory is actually enhanced for rare, P3b-eliciting events. In the present study, we found that both behavioral and electrophysiological measures of working memory were enhanced for rare events. However, it is not clear that the increased P3b-related brain activity actually caused the enhancement of working memory.
Assistive sensory-motor perturbations influence learned neural representations
Authors: Rajeswaran Pavithra , Payeur Alexandre , Lajoie Guillaume , Orsborn Amy L.
Published: March 2024

Task errors are used to learn and refine motor skills. We investigated how task assistance influences learned neural representations using Brain-Computer Interfaces (BCIs), which map neural activity into movement via a decoder. We analyzed motor cortex activity as monkeys practiced BCI with a decoder that adapted to improve or maintain performance over days. The dimensionality of the population of neurons controlling the BCI remained constant or increased with learning, counter to expected trends from motor learning. Yet, over time, task information was contained in a smaller subset of neurons or population modes. Moreover, task information was ultimately stored in neural modes that occupied a small fraction of the population variance. An artificial neural network model suggests the adaptive decoders contribute to forming these compact neural representations. Our findings show that assistive decoders manipulate error information used for long-term learning computations, like credit assignment, which informs our understanding of motor learning and has implications for designing real-world BCIs.
Mitochondrial pyruvate transport regulates presynaptic metabolism and neurotransmission
Authors: Tiwari Anupama , Myeong Jongyun , Hashemiaghdam Arsalan , Zhang Hao , Niu Xianfeng , Laramie Marissa A. , Stunault Marion I. , Sponagel Jasmin , Patti Gary , Shriver Leah , Klyachko Vitaly , Ashrafi Ghazaleh
Published: March 2024

Glucose has long been considered the primary fuel source for the brain. However, glucose levels fluctuate in the brain during sleep, intense circuit activity, or dietary restrictions, posing significant metabolic stress. Here, we demonstrate that the mammalian brain utilizes pyruvate as a fuel source, and pyruvate can support neuronal viability in the absence of glucose. Nerve terminals are sites of metabolic vulnerability within a neuron and we show that mitochondrial pyruvate uptake is a critical step in oxidative ATP production in hippocampal terminals. We find that the mitochondrial pyruvate carrier is post-translationally modified by lysine acetylation which in turn modulates mitochondrial pyruvate uptake. Importantly, our data reveal that the mitochondrial pyruvate carrier regulates distinct steps in synaptic transmission, namely, the spatiotemporal pattern of synaptic vesicle release and the efficiency of vesicle retrieval, functions that have profound implications for synaptic plasticity. In summary, we identify pyruvate as a potent neuronal fuel and mitochondrial pyruvate uptake as a critical node for the metabolic control of synaptic transmission in hippocampal terminals.

HIGHLIGHTS

Serum pyruvate is taken up by the brain and efficiently oxidized in the TCA cycle.

The mitochondrial pyruvate carrier (MPC) is essential for presynaptic energy metabolism.

Acetylation of the MPC complex modulates mitochondrial pyruvate uptake.

MPC activity regulates the release and retrieval of synaptic vesicles in nerve terminals.
Robust chromatin state annotation
Authors: Foroozandeh Shahraki Mehdi , Farahbod Marjan , Libbrecht Maxwell W.
Published: March 2024

With the goal of mapping genomic activity, international projects have recently measured epigenetic activity in hundreds of cell and tissue types. Chromatin state annotations produced by segmentation and genome annotation (SAGA) methods have emerged as the predominant way to summarize these epigenomic data sets in order to annotate the genome. These chromatin state annotations are essential for many genomic tasks, including identifying active regulatory elements and interpreting disease-associated genetic variation. However, despite the widespread applications of SAGA methods, no principled approach exists to evaluate the statistical significance of chromatin state assignments. Here, we propose the first method for assigning calibrated confidence scores to chromatin state annotations. Toward this goal, we performed a comprehensive evaluation of the reproducibility of the two most widely used existing SAGA methods, ChromHMM and Segway. We found that their predictions are frequently irreproducible. For example, when applying the same SAGA method on two sets of experimental replicates, 27%–69% of predicted enhancers fail to replicate. This suggests that a substantial fraction of predicted elements in existing chromatin state annotations cannot be relied upon. To remedy this problem, we introduce SAGAconf, a method for assigning a measure of confidence (r-value) to chromatin state annotations. SAGAconf works with any SAGA method and assigns anr-value to each genomic bin of a chromatin state annotation that represents the probability that the label of this bin will be reproduced in a replicated experiment. Thus, SAGAconf allows a researcher to select only the reliable predictions from a chromatin annotation for use in downstream analyses.
Spontaneous Chirality Flipping in an Orthogonal Spin-Charge Ordered Topological Magnet
Authors: Miao H. , Bouaziz J. , Fabbris G. , Meier W. R. , Yang F. Z. , Li H. X. , Nelson C. , Vescovo E. , Zhang S. , Christianson A. D. , Lee H. N. , Zhang Y. , Batista C. D. , Blügel S.
Published: March 2024

The asymmetric distribution of chiral objects with opposite chirality is of great fundamental interest ranging from molecular biology to particle physics. In quantum materials, chiral states can build on inversion-symmetry-breaking lattice structures or emerge from spontaneous magnetic ordering induced by competing interactions. Although the handedness of a chiral state can be changed through external fields, a spontaneous chirality flipping has yet to be discovered. We present experimental evidence of chirality flipping via changing temperature in a topological magnet EuAl4, which features orthogonal spin density waves (SDW) and charge density waves (CDW). Using circular dichroism of Bragg peaks in the resonant magnetic x-ray scattering, we find that the chirality of the helical SDW flips through a first-order phase transition with modified SDW wavelength. Intriguingly, we observe that the CDW couples strongly with the SDW and displays a rare commensurate-to-incommensurate transition at the chirality flipping temperature. Combining with first-principles calculations and angle-resolved photoemission spectroscopy, our results support a Fermi surface origin of the helical SDW with intertwined spin, charge, and lattice degrees of freedom in EuAl4. Our results reveal an unprecedented spontaneous chirality flipping and lay the groundwork for a new functional manipulation of chirality through momentum-dependent spin-charge-lattice interactions.

Published by the American Physical Society
2024
Synthesis and crystal structure of N-phenyl-2-(phenylsulfanyl)acetamide
Authors: Mohamed-Ezzat Reham A. , Kariuki Benson M. , Elgemeie Galal H.
Published: March 2024

N-Phenyl-2-(phenylsulfanyl)acetamide, C14H13NOS, was synthesized and structurally characterized. In the crystal, N—H...O hydrogen bonding leads to the formation of chains of molecules along the [100] direction. The chains are linked by C—H...π interactions, forming a three-dimensional network. The crystal studied was twinned by a twofold rotation around [100].
Synthesis, crystal structure and Hirshfeld surface analysis of 2-phenyl-3-(prop-2-yn-1-yloxy)quinoxaline
Authors: Abad Nadeem , Mague Joel T. , Alsubari Abdulsalam , Essassi El Mokhtar , Pourayoubi Mehrdad , Yahya Abdullah Alzahrani Abdullah , Ramli Youssef
Published: March 2024

In the title compound, C17H12N2O, the quinoxaline moiety shows deviations of 0.0288 (7) to −0.0370 (7) Å from the mean plane (r.m.s. deviation of fitted atoms = 0.0223 Å). In the crystal, corrugated layers two molecules thick are formed by C—H...N hydrogen bonds and π-stacking interactions.
Does blockchain adoption engender environmental sustainability? The mediating role of customer integration
Authors: Mohamed Summer K. , Haddad Sandra , Barakat Mahmoud
Published: March 2024

Purpose

Due to the rapid increase in environmental degradation and depletion of natural resources, there has been a recent shift in global focus from economic concerns to environmental ones. The purpose of this research is to examine the relevant literature on the use of blockchain technology to promote environmental sustainability through customer integration.

Design/methodology/approach

The proposed framework is based on the theoretical lens of systems theory (ST) and knowledge-based view (KBV) theory, and is developed by conducting a systematic literature review of 51 articles, (16) from 2022, (17) from 2021, (10) 2020, (5) 2019, (2) 2018 and (1) from 2017 on blockchain technology (BCT), environmental supply chain performance (ESCP) and customer integration.

Findings

Three main propositions are formulated and demonstrated using the developed framework, which shows that BCT has the potential to revolutionize the supply chain from an environmental sustainability perspective through facilitating waste management, reduction of energy consumption and reduction of carbon emissions/pollution. The technology will not only enhance the environmental sustainability but also facilitate customer integration through resolving transparency issues, protecting data/enhancing security, database decentralization, promoting trust and immutability.

Originality/value

The effects of blockchain on supply chain performance has been studied in the past; however, no studies were found which shed light on how BCT can affect ESCP through the mediation of customer integration.
Leadership coaching strategies for Black women leaders who code switch: avoiding linguistic profiling career boundaries
Authors: Carter Angela Danielle , Sisco Stephanie
Published: March 2024

Purpose

This case study, within the context of boundaryless and protean career development frameworks, investigates linguistic profiling and how code-switching is used to mitigate its impact on Black leaders during their careers. The experiences of Black women coaches and the coaching support they offered Black women clients in code-switching, leadership and career advancement are described. The value of leadership coaching when used to navigate these career progression challenges is emphasized.

Design/methodology/approach

The study employed a multiple-case study approach of two Black women leadership coaches.

Findings

The findings of this study illustrate the understanding of code-switching and the coaching techniques employed by two Black women leadership coaches. Sage focused on educational strategies, offering historical contexts and resources, while Khadijah leaned on empathy-driven methods, using storytelling to evoke reflection. Both coaches emphasized creating safe spaces for open dialog, encouraged clients to reconsider their actions and values regarding code-switching challenges and sought to prompt clients towards authenticity while navigating career spaces effectively.

Practical implications

Additional strategies for coach practitioners include cultivating trust and a safe environment; active listening; challenging biases and assumptions; contextual understanding; empowering authentic self-expression; fostering skill development; challenging stereotypes; promoting autonomy and flexibility and adopting cross-cultural sensitivity, humility and competence. These practical coaching strategies bridge the gap in career development research by demonstrating how race-conscious strategies can promote workplace inclusivity and promulgate career development.

Originality/value

The study underscores the problem of linguistic profiling, the complexity of code-switching and implications for Black women navigating their career journey within professional spaces. It highlights the significance and value of tailored leadership coaching strategies to promote career advancement. This study addresses the gap in career development research related to linguistic profiling avoidance strategies for workplace inclusivity.
External audits and official controls – what’s the difference in their usefulness and credibility?
Authors: Rogala Piotr , Kafel Piotr , Lapina Inga
Published: March 2024

Purpose

The study aims to determine whether audited organizations experience differences between external audits and official controls.

Design/methodology/approach

A survey among 100 organic food producers was conducted to explore differences regarding the usability of external audits and official controls. The survey was conducted in 2020 using the computer-assisted telephone interview (CATI) method supplemented by the computer-assisted web interview (CAWI) method. Organizations processing organic farming products in Poland were chosen for the study.

Findings

Three primary benefits associated with external audits and official controls were identified, i.e. (1) enabling and initiating activities related to the improvement of the organization, (2) improving the financial performance of the organization and (3) enhancing credibility. For most organizations, the assessment of these features was at the same level for both external audits and official control. However, if these assessments differed, commercial audits were assessed at a higher level than official controls.

Research limitations/implications

The study is limited to only one specific type of manufacturing organization and one European country.

Originality/value

The literature review shows some conceptual differences between audits and official controls, but the results of this study show that the business environment does not perceive these differences as significant. Thus, the value of the study is reflected in the conclusion that both external audits and official controls are considered useful and credible approaches to monitoring the quality within the organization, which allows us to state that external evaluation is generally seen as an opportunity to improve the performance of the organization.
Cloud Computing and firm performance: a SEM microdata analysis for Israeli firms
Authors: Katz Raúl , Jung Juan , Goldman Matan
Published: March 2024

Purpose

This paper aims to study the economic effects of Cloud Computing for a sample of Israeli firms. The authors propose a framework that considers how this technology affects firm performance also introducing the indirect economic effects that take place through cloud-complementary technologies such as Big Data and Machine Learning.

Design/methodology/approach

The model is estimated through structural equation modeling. The data set consists of the microdata of the survey of information and communication technologies uses and cyber protection in business conducted in Israel by the Central Bureau of Statistics.

Findings

The results point to Cloud Computing as a crucial technology to increase firm performance, presenting significant direct and indirect effects as the use of complementary technologies maximizes its impact. Firms that enjoy most direct economic gains from Cloud Computing appear to be the smaller ones, although larger enterprises seem more capable to assimilate complementary technologies, such as Big Data and Machine Learning. The total effects of cloud on firm performance are quite similar among manufacturing and service firms, although the composition of the different effects involved is different.

Originality/value

This paper is one of the very few analyses estimating the impact of Cloud Computing on firm performance based on country microdata and, to the best of the authors’ knowledge, the first one that contemplates the indirect economic effects that take place through cloud-complementary technologies such as Big Data and Machine Learning.
Exploring the impact of serious leisure on well-being and self-perceived employability: the mediating role of career adaptability amongst Chinese undergraduates
Authors: Ma Yin , Nimmi P.M. , Mouratidou Maria , Donald William E.
Published: March 2024

Purpose

This study aims to explore the impact of engaging in serious leisure (SL) on the well-being (WB) and self-perceived employability (PE) of university students while also considering the role of career adaptability (CA) as a mediator.

Design/methodology/approach

A total of 905 domestic undergraduate students from China completed an online survey.

Findings

The findings reveal that participation in SL positively influences WB and PE. Additionally, the results indicate that CA mediates the SL-WB relationship but not the SL-PE relationship.

Originality/value

The theoretical contribution of this research comes from advancing our understanding of sustainable career theory through empirical testing of SL, PE, and CA on WB outcomes within a higher education setting. The practical implications of this study involve providing universities with strategies to support domestic Chinese undergraduate students in enhancing their WB and PE through active engagement in SL pursuits and the development of CA. Moreover, our findings serve as a foundation for future research investigating whether insights gained from domestic Chinese undergraduate students can provide solutions on a global scale to address the persistent challenges of improving student WB and PE.
Enucleating the student support and services needs in higher education: the application of Kano analysis as a strategic tool
Authors: Tejero-Dakay Irish , Lozano Lorafe , Ferolin Rosana
Published: March 2024

Purpose

This paper aims to help higher education institutions (HEIs) develop a better understanding of student support and services needs, thereby enabling them to allocate limited resources for initiatives that effectively improve student experience.

Design/methodology/approach

An assessment framework following the Kano analysis is developed to categorize student service features based on customer satisfaction and need fulfillment. The framework is used at a local university, using 23 service features listed as minimum requirements by the national regulatory body for education. Analysis of the satisfaction survey results and prioritization are based on quality indices derived from a factor of importance and the satisfaction gap. A survey was conducted for two academic years to generate a comparison of results.

Findings

Of the list mandated as minimum requirements for HEIs, the study revealed that no features were regarded as “must-be,” eight as performing, 14 as attractive and one as indifferent by the students. As these results were disaggregated per year level, the natural decay of delight as in the Kano theory was exhibited as there were less attractive features for students who have been in the university longest. After a full-year academic cycle, results compared to the baseline figures seemed to reveal of impact of the achievement of performance targets by the units rendering specific activities on client satisfaction.

Research limitations/implications

Further rounds of the study are needed to build up more data sets on the relationship between objective performance and satisfaction level for performing features, mindful that this categorization is also bound to change along the way.

Practical implications

As HEIs in the Philippines journey towards the establishment of their own respective internal quality assurance systems, this study provides a practical approach for institutions to transform a mere list of student services for compliance into a strategic tool to enhance the student experience.

Originality/value

In the context of continuous quality improvement, the study presents how the qualitative Kano model, along with simple quantitative tools in the methodology, can be utilized not only in the planning stage of service design but also in closing the planning, doing, checking and acting (PDCA) cycle and opening the quality improvement spiral.
Application of Six Sigma methodology in the analysis of variance: process shift versus inflation coefficient
Authors: Joghee Ravichandran , Varghese Reesa
Published: March 2024

Purpose

The purpose of this article is to study the link between mean shift and inflation coefficient when the underlying null hypothesis is rejected in the analysis of variance (ANOVA) application after the preliminary test on the model specification.

Design/methodology/approach

A new approach is proposed to study the link between mean shift and inflation coefficient when the underlying null hypothesis is rejected in the ANOVA application. First, we determine this relationship from the general perspective of Six Sigma methodology under the normality assumption. Then, the approach is extended to a balanced two-stage nested design with a random effects model in which a preliminary test is used to fix the main test statistic.

Findings

The features of mean-shifted and inflated (but centred) processes with the same specification limits from the perspective of Six Sigma are studied. The shift and inflation coefficients are derived for the two-stage balanced ANOVA model. We obtained good predictions for the process shift, given the inflation coefficient, which has been demonstrated using numerical results and applied to case studies. It is understood that the proposed method may be used as a tool to obtain an efficient variance estimator under mean shift.

Research limitations/implications

In this work, as a new research approach, we studied the link between mean shift and inflation coefficients when the underlying null hypothesis is rejected in the ANOVA. Derivations for these coefficients are presented. The results when the null hypothesis is accepted are also studied. This needs the help of preliminary tests to decide on the model assumptions, and hence the researchers are expected to be familiar with the application of preliminary tests.

Practical implications

After studying the proposed approach with extensive numerical results, we have provided two practical examples that demonstrate the significance of the approach for real-time practitioners. The practitioners are expected to take additional care before deciding on the model assumptions by applying preliminary tests.

Originality/value

The proposed approach is original in the sense that there have been no similar approaches existing in the literature that combine Six Sigma and preliminary tests in ANOVA applications.
The role of social and environmental sustainability on sportswear’s purchasing among European consumers
Authors: Fuchs Michael , Bodet Guillaume , Hovemann Gregor
Published: March 2024

Purpose

While consumer preferences for sporting goods have been widely researched within sport management, literature is lacking on aspects of social and environmental sustainability. Accordingly, this study aims to investigate the role of social and environmental sustainability for purchase decisions of sportswear and compares them to the role of price and functionality.

Design/methodology/approach

Based on a conjoint analysis among 1,012 Europeans, the authors conducted a two-step cluster analysis. First, the authors investigated the number of segments via Ward’s method. Second, the authors ran a k-means analysis based on part-worth utilities from the conjoint analysis.

Findings

The authors identified four segments which differ in terms of preferred product attributes, willingness to pay, and sociodemographic, behavioral, and psychographic characteristics: undecided, sustainable, price-focused and function-oriented consumers. Based on this segmentation, the authors found that the importance of social and environmental sustainability is growing, but not among all consumers.

Research limitations/implications

The generalizability of the study is limited since it is not built on a sample representative for the included European countries, it focuses on a single product, and participants are potentially subject to a social desirability bias.

Originality/value

The consumer analysis comprises the uptake of attributes related to social and environmental sustainability. The authors thereby address a literature gap as previous research (thematizing sporting goods) in the sport management field has often neglected sustainability elements despite their rapidly growing importance within the sport sector.
Harnessing appreciative inquiry in tourism planning: towards a strategy for poverty alleviation in marginalised communities
Authors: Elsawy Tamer M.
Published: March 2024

Purpose

This study aims to apply the appreciative inquiry approach (AI) to develop a tourism strategy for poverty alleviation in marginalised communities. The focus is to provide practical insights for leveraging tourism to drive positive socio-economic change for the impoverished, using Rosetta, a port city in Egypt with cultural and historical significance, as a case study.

Design/methodology/approach

This qualitative applied study uses the four-D phases of AI and thematic analysis to strategise tourism development in Rosetta. Through interviews, focus groups and field visits, the study identifies tourism potential, stakeholder aspirations and actionable strategies for sustainable development. The approach prioritises a bottom-up, community-centric and stakeholder-involved process, aiming for inclusive and equitable growth.

Findings

The study revealed Rosetta’s underutilised tourism potential, emphasising heritage tourism. Although tourism offers some economic benefits, its impact on alleviating poverty in Rosetta remains limited. A holistic strategy for tourism development in Rosetta is proposed for economic growth and poverty reduction, focusing on sustainable management, local empowerment, enhanced marketing, improved infrastructure and diversified tourism offerings.

Originality/value

While AI is not new in qualitative studies, the novelty of this study lies in its application to tourism planning for poverty alleviation in a marginalised community like Rosetta, introducing a comprehensive tourism strategy with an original framework applicable to comparable destinations. The study’s significance is emphasised by providing actionable strategies for policymakers, valuable insights for practitioners and enriching the discourse and methodology on pro-poor tourism for academics, representing a step towards filling the gap between theoretical concepts and practical strategies.
Researching the use of e-portfolios to promote students thinking in digital age: a qualitative action study
Authors: Afrilyasanti Rida , Suhartoyo Eko , Widiati Utami
Published: March 2024

Purpose

Through the action research study, this paper aims to examine how e-portfolios improve students’ critical, reflective and creative thinking as part of higher-order thinking skills (HOTS). Besides, this paper also explores how e-portfolios enhance students’ speaking skills. The study is carried out to improve the current state by identifying and solving problems in specific contexts.

Design/methodology/approach

This investigation was designed to seek the improvement of the students’ higher-order thinking and speaking skills after the implementation of the e-portfolio. Action research was chosen because action research is suitable to bring change and improvement in the system or assume to bring progress in the system. This study was designed in two phases, featuring reflection and connection between previous and new data.

Findings

By completing this action research study, the authors assisted students in improving their higher-order thinking and speaking skills. The improvement was related to the indicators for learning success, which were explained in this research. The HOTS criteria include the capacity to analyze essential facts and arguments that the students presented in their spoken works logically and critically.

Research limitations/implications

HOTS encompasses critical, logical, creative and metacognitive thinking skills. Future research should go further into the usage of e-portfolios in the development of students’ metacognitive capacities. Moreover, because this investigation was carried out using action research methods, it is crucial to recognize that no generalizability can be offered for the findings.

Practical implications

The study’s findings should also benefit practitioners and instructors endeavoring to enhance students’ e-portfolios, critical thinking and digital skills in the classroom.

Social implications

The discussion focuses on important development topics. Everyone, not just students, should be encouraged to participate in creating and developing our technological future. The analysis offers unique and essential perspectives into what to explore for such a substantial attempt as implementing digital technology, specifically to construct an e-portfolio.

Originality/value

Despite the widespread usage of e-portfolios in English as a foreign language (EFL) instruction, there is a lack of research on how e-portfolios can enhance EFL students’ HOTS and speaking abilities. Hence, this study addresses a deficiency in existing research by examining the potential of e-portfolios to enhance students’ HOTS and oral communication skills within the context of EFL.
When government is the solution: creating the arms industry in the Connecticut River Valley in the 1800s
Authors: Ford Robert , Regele Lindsay Schakenbach
Published: March 2024

Purpose

This historical example of the creation of the arms industry in the Connecticut River Valley in the 1800s provides new insights into the value of government venture capital (GVC) and government demand in creating a new industry. Since current theoretical explanations of the best uses of governmental venture capital are still under development, there is considerable need for further theory development to explain and predict the creation of an industry and especially those industries where failures in private capital supply necessitates governmental involvement in new firm creation. The purpose of this paper is to provide an in depth historical review of how the arms industry evolved spurred by GVC and government created demand.

Design/methodology/approach

This study uses abductive inference as the best way to build and test emerging theories and advancing theoretical explanations of the best uses of GVC and governmental demand to achieve socially required outcomes.

Findings

By observing this specific historical example in detail, the authors add to the understanding of value creation caused by governmental venture capital funding of existing theory. A major contribution of this paper is to advance theory based on detailed observation.

Originality/value

The relatively limited research literature and theory development on governmental venture capital funding and the critical success factors in startups are enriched by this abductive investigation of the creation of the historically important arms industry and its spillover into creating the specialized machine industry.
Applying STEM and extended reality technologies to explore students' artificial intelligence learning performance and behavior for sustainable development goals
Authors: Su Yu-Sheng , Tseng Wen-Ling , Cheng Hung-Wei , Lai Chin-Feng
Published: March 2024

Purpose

To support achieving sustainable development goals (SDGs), we integrated science, technology, engineering and math (STEM) and extended reality technologies into an artificial intelligence (AI) learning activity. We developed Feature City to facilitate students' learning of AI concepts. This study aimed to explore students' learning outcomes and behaviors when using Feature City.

Design/methodology/approach

Junior high school students were the subjects who used Feature City in an AI learning activity. The learning activity consisted of 90-min sessions once per week for five weeks. Before the learning activity, the teacher clarified the learning objectives and administered a pretest. The teacher then instructed the students on the features, supervised learning and unsupervised learning units. After the learning activity, the teacher conducted a posttest. We analyzed the students' prior knowledge and learning performance by evaluating their pretest and posttest results and observing their learning behaviors in the AI learning activity.

Findings

(1) Students used Feature City to learn AI concepts to improve their learning outcomes. (2) Female students learned more effectively with Feature City than male students. (3) Male students were more likely than female students to complete the learning tasks in Feature City the first time they used it.

Originality/value

Within SDGs, this study used STEM and extended reality technologies to develop Feature City to engage students in learning about AI. The study examined how much Feature City improved students' learning outcomes and explored the differences in their learning outcomes and behaviors. The results showed that students' use of Feature City helped to improve their learning outcomes. Female students achieved better learning outcomes than their male counterparts. Male students initially exhibited a behavioral pattern of seeking clarification and error analysis when learning AI education, more so than their female counterparts. The findings can help teachers adjust AI education appropriately to match the tutorial content with students' AI learning needs.
Metaverse-driven sustainable tourism: a horizon 2050 paper
Authors: Tran Lobel Trong Thuy
Published: March 2024

Purpose

This study aims to delve into the transformative potential of metaverse-driven sustainable tourism (MDST) to envision a sustainable and inclusive future for the tourism industry.

Design/methodology/approach

The author uses a forward-looking approach by drawing insights from existing literature, visionary articles and an analysis of technological developments to project the MDST trajectory to 2050, aligning with sustainable development goals (SDGs).

Findings

The study highlights the profound potential of MDST as a crucial force in sustainable tourism, identifying key components – immersive experiences, artificial intelligence integration, blockchain and collaborative platforms – that will drive MDST’s evolution. The alignment with SDGs demonstrates MDST’s capacity to facilitate global collaboration, cultural exchange and community engagement, especially in uncertain situations (e.g. pandemic).

Research limitations/implications

While presenting an exploration of MDST, there is a need for empirical evidence in response to the dynamic tourism environment.

Practical implications

Tourism policymakers, businesses and technology developers can leverage MDST to drive sustainable practices, enhance user experiences and contribute to economic growth. The findings offer actionable insights for the practical implementation of MDST initiatives, aligning with the importance of SDGs.

Originality/value

The value of this study lies in its forward-looking perspective, envisioning the role of MDST in the year 2050. The author proposes ten foci for MDST development, contributing to the discourse on sustainable tourism.
Among‐population variation in telomere regulatory proteins and their potential role as hidden drivers of intraspecific variation in life history
Authors: Wolf Sarah E. , Woodruff Mary J. , Chang van Oordt David A. , Clotfelter Ethan D. , Cristol Daniel A. , Derryberry Elizabeth P. , Ferguson Stephen M. , Stanback Mark T. , Taff Conor C. , Vitousek Maren N. , Westneat David F. , Rosvall Kimberly A.
Published: March 2024

Biologists aim to explain patterns of growth, reproduction and ageing that characterize life histories, yet we are just beginning to understand the proximate mechanisms that generate this diversity. Existing research in this area has focused on telomeres but has generally overlooked the telomere's most direct mediator, the shelterin protein complex. Shelterin proteins physically interact with the telomere to shape its shortening and repair. They also regulate metabolism and immune function, suggesting a potential role in life history variation in the wild. However, research on shelterin proteins is uncommon outside of biomolecular work.

Intraspecific analyses can play an important role in resolving these unknowns because they reveal subtle variation in life history within and among populations. Here, we assessed ecogeographic variation in shelterin protein abundance across eight populations of tree swallow (Tachycineta bicolor) with previously documented variation in environmental and life history traits. Using the blood gene expression of four shelterin proteins in 12‐day‐old nestlings, we tested the hypothesis that shelterin protein gene expression varies latitudinally and in relation to both telomere length and life history.

Shelterin protein gene expression differed among populations and tracked non‐linear variation in latitude: nestlings from mid‐latitudes expressed nearly double the shelterin mRNA on average than those at more northern and southern sites. However, telomere length was not significantly related to latitude.

We next assessed whether telomere length and shelterin protein gene expression correlate with 12‐day‐old body mass and wing length, two proxies of nestling growth linked to future fecundity and survival. We found that body mass and wing length correlated more strongly (and significantly) with shelterin protein gene expression than with telomere length.

These results highlight telomere regulatory shelterin proteins as potential mediators of life history variation among populations. Together with existing research linking shelterin proteins and life history variation within populations, these ecogeographic patterns underscore the need for continued integration of ecology, evolution and telomere biology, which together will advance understanding of the drivers of life history variation in nature.
The landscape of fear in cattle farms? How the presence of barn swallow influences the activity of pest flies
Authors: Roseo Francesca , Salvatori Marco , Brambilla Mattia , Pedrini Paolo , Fedrigotti Chiara , Bertocchi Alberto
Published: March 2024

Insectivorous birds are key suppliers of crucial ecosystem services, especially important for pest control in agricultural systems, and are globally decreasing at a fast rate. Among them, the declining barn swallow Hirundo rustica is particularly linked to cattle farms, where it is impacted by changes in livestock husbandry practices.

The presence of swallows in cattle sheds might contribute to control insect pests, but such an effect had never been explored. With this work, we evaluated the potential control effect exerted by barn swallow on economically relevant pest insects, filth flies.

To assess whether swallows inside the cattle sheds influence the activity rate of pest flies (especially Musca domestica and Stomoxys calcitrans), we assessed the relative abundance of swallows and flies over 16 weeks in nine different cattle farms in Non valley (Trentino, North‐east Italy), either occupied or not by nesting swallows. From April 2022 to August 2022, we collected weekly data on the activity rate of flies by placing eight white spot cards inside each of nine cattle sheds and counting the deposition of faecal and regurgitation spots by flies. Simultaneously, we collected weekly data regarding swallow occurrence, brood size, number and age of chicks.

We applied generalised linear mixed effect models on the activity rate of flies, with spot card and farm as nested random effects, to account for potential random variability between cards and farms. We then assessed through model selection the effect of number of cows, number of swallows, and temperature or week alternatively. Temperature and week were modelled also in interaction with the number of swallows.

Fly activity rate followed a seasonal trend with a peak in July, which was markedly lower where swallows were present. Moreover, the positive relationship between flies and temperature was lessened when swallows were abundant.

Synthesis and applications. Barn swallows are effective biological control agents for lowering pest fly activity in livestock farms. Farmers were actively involved in swallow conservation within their sheds, also with a shared memorandum‐of‐intent. Harnessing the ecosystem services supplied by farmland birds could bring positive outcomes for people and biodiversity.
Seed bank and aboveground vegetation of Atlantic Forest re‐growing on mining tailings in Mariana: Highlighting diversity patterns of functional groups
Authors: Martins Sebastião Venâncio , Pilocelli Aline , Kruschewsky Gabriel Correa , Dias Andreia Aparecida , Nabeta Fabio Haruki , Villa Pedro Manuel
Published: March 2024

Natural regeneration after mining activities depends largely on the soil seed bank (SSB) and aboveground vegetation (AGV) richness and composition. We evaluated the species diversity pattern of the SSB and AGV on soil and technosol across second‐growth Atlantic Forests (SGFs) after mining tailings deposition in Mariana, southeastern Brazil. Two second‐growth Atlantic seasonal semideciduous forests of different stand ages were selected: a 3‐year‐old stand of SGF re‐growing on tailings (SGF tailings) and a 30‐year‐old stand of native reference forest not affected by tailings (SGF nontailings). Overall, the results showed significant differences in forest attributes (species richness and composition) in the SSB and AGV between the two forest patches evaluated (SGF tailings and SGF nontailings). Moreover, both nonzoochoric and zoochoric dispersed species of AGV showed significant differences between second‐growth forests, with higher variability of community‐weighted mean in SGF tailings. The result shows smaller differences in species richness between forest types for both SBB (ranging 85 and 90 species) and AGV (~55 species). Despite the time difference between the secondary forest and the absence of zoochoric species in the tailings seed bank, the AGV that are re‐growing on mining tailings presented a high proportion of zoochoric species. This pattern of species richness and community composition variability observed in the technosol seed bank, and AGV that are re‐growing after the deposition of mining tailings are important recovery indicators for plant communities affected.
Planning deregulation: What if land markets are monopolies?
Authors: Sims Emily , Hermans Jesse
Published: March 2024

Upzoning and land‐use reform are widely discussed as a way to improve housing supply and affordability. However, some literature contests this view and leads to apparent contradictions. We consider the theoretical frameworks and literature underpinning these divergent views in the hopes to establish mutual coherence, as well as questions for further research and the nascent but growing literature of empirical studies that could evaluate them.
A Comment on the Financial Literacy, Financial Risks and Financial Challenges Facing Older Australians
Authors: Austen Siobhan , Preston Alison
Published: March 2024

Drawing on data from the Household, Income and Labour Dynamics in Australia (HILDA) Survey and from qualitative data from in‐depth interviews with older Australians in mixed sex couple households, this article highlights the risks and vulnerabilities that older Australians face in saving for retirement and, importantly, in drawing down assets in retirement. The article also provides data on financial literacy and risk‐taking among older Australians.
The population genetics of partial diapause, with applications to the aestivating malaria mosquito Anopheles coluzzii
Authors: Mwima Rita , Hui Tin‐Yu J. , Kayondo Jonathan K. , Burt Austin
Published: March 2024

Diapause, a form of dormancy to delay or halt the reproductive development during unfavourable seasons, has evolved in many insect species. One example is aestivation, an adult‐stage diapause enhancing malaria vectors' survival during the dry season (DS) and their re‐establishment in the next rainy season (RS). This work develops a novel genetic approach to estimate the number or proportion of individuals undergoing diapause, as well as the breeding sizes of the two seasons, using signals from temporal allele frequency dynamics. Our modelling shows the magnitude of drift is dampened at early RS when previously aestivating individuals reappear. Aestivation severely biases the temporal effective population size (), leading to overestimation of the DS breeding size by across 1 year, where is the aestivating proportion. We find sampling breeding individuals in three consecutive seasons starting from an RS is sufficient for parameter estimation, and perform extensive simulations to verify our derivations. This method does not require sampling individuals in the dormant state, the biggest challenge in most studies. We illustrate the method by applying it to a published data set for Anopheles coluzzii mosquitoes from Thierola, Mali. Our method and the expected evolutionary implications are applicable to any species in which a fraction of the population diapauses for more than one generation, and are difficult or impossible to sample during that stage.