bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theta-nested gamma oscillations in next generation neural mass models
Authors: Segneri Marco , Bi Hongjie , Olmi Simona , Torcini Alessandro 
Published: March 2020

ABSTRACTTheta-nested gamma oscillations have been reported in many areas of the brain and are believed to represent a fundamental mechanism to transfer information across spatial and temporal scales. In a series of recent experimentsin vitroit has been possible to replicate with an optogenetic theta frequency stimulation several features of cross-frequency coupling (CFC) among theta and gamma rhythms observed in behaving animals. In order to reproduce the main findings of these experiments we have considered a new class of neural mass models able to reproduce exactly the macroscopic dynamics of spiking neural networks. In this framework, we have examined two set-ups able to support collective gamma oscillations: namely, the pyramidal interneuronal network gamma (PING) and the interneuronal network gamma (ING). In both set-ups we observe the emergence of theta-nested gamma oscillations by driving the system with a sinusoidal theta-forcing in proximity of a Hopf bifurcation. These mixed rhythms display always phase amplitude coupling. However two different types of nested oscillations can be identified: one characterized by a perfect phase locking between theta and gamma rhythms, corresponding to an overall periodic behaviour; another one where the locking is imperfect and the dynamics is quasi-periodic or even chaotic. From our analysis it emerges that the locked states are more frequent in the ING set-up. In agreement with the experiments, we find theta-nested gamma oscillations for forcing frequencies in the range [1:10] Hz, whose amplitudes grow proportionally to the forcing one and which are clearly modulated by the theta phase. Furthermore, analogously to the experiments, the gamma power and the frequency of the gamma-power peak increase with the forcing amplitude. At variance with experimental findings, the gamma-power peak does not shift to higher frequencies by increasing the theta frequency. This effect can be obtained, in or model, only by incrementing, at the same time, also the noise or the forcing amplitude. On the basis of our analysis both the PING and ING mechanisms give rise to theta-nested gamma oscillations with almost identical features.
The role of body temperature in regulating brain and body sizes in hominin evolution
Authors: Lingam Manasvi 
Published: March 2020

AbstractA number of models have posited that the concomitant evolution of large brains and increased body sizes in hominins was constrained by metabolic costs. In such studies, the impact of body temperature has not been sufficiently addressed despite the well-established fact that the rates of most physiological processes are manifestly temperature-dependent. Hence, the role of body temperature in modulating the number of neurons and body size is investigated in this work by means of a simple quantitative model. It is determined that modest deviations in the body temperature (i.e., by a few degrees Celsius) might bring about substantive changes in brain and body parameters. In particular, a higher body temperature might prove amenable to an increase in the number of neurons, a higher brain-to-body mass ratio and fewer hours expended on feeding activities, while the converse applies when the temperature is lowered. It is therefore argued that future studies must endeavour to explore and incorporate the effects of body temperature in metabolic theories of hominin evolution, while also accounting for other factors such as foraging efficiency, diet and fire control in tandem.
Amplitude modulation encoding in auditory cortex: Comparisons between the primary and middle lateral belt regions
Authors: Johnson Jeffrey S. , Niwa Mamiko , O’Connor Kevin N. , Sutter Mitchell L. 
Published: March 2020

ABSTRACTIn macaques, the middle lateral auditory cortex (ML) is a belt region adjacent to primary auditory cortex (A1) and believed to be at a hierarchically higher level. Although ML single-unit responses have been studied for several auditory stimuli, the ability of ML cells to encode amplitude modulation (AM) – an ability which has been widely studied in A1 – has not yet been characterized. Here we compare the responses of A1 and ML neurons to amplitude modulated (AM) noise in awake macaques. While several of the basic properties of A1 and ML responses to AM noise are similar, we found several key differences. ML neurons do not phase lock as strongly, are less likely to phase lock, and are more likely to respond in a non-synchronized fashion than A1 cells, consistent with a temporal-to-rate transformation as information ascends the auditory hierarchy. ML neurons tend to have lower temporally (phase-locking) based best modulation frequencies than A1. At the level of ML, neurons that decrease firing rate with increasing modulation depth become more common than in A1. In both A1 and ML we find a prevalent class of neurons with excitatory rate responses at lower modulation frequencies and suppressed rate responses relative to the unmodulated carrier at middle modulation frequencies.
C. elegansELT-3 regulates cuticle collagen expression in response to environmental stimuli
Authors: Mesbahi Hiva , Pho Kim B. , Tench Andrea J. , Leon Guerrero Victoria L. , MacNeil Lesley T. 
Published: March 2020

AbstractThe nematodeCaenorhabditis elegansis protected from the environment by the cuticle, an extracellular collagen-based matrix that encloses the animal. Over 170 cuticular collagens are predicted in theC. elegansgenome, but the role of each individual collagen is unclear. Stage-specific specialization of the cuticle explains the need for some collagens, however, the large number of collagens suggests that specialization of the cuticle may also occur in response to other environmental triggers. Missense mutations in many collagen genes can disrupt cuticle morphology, producing a helically twisted body causing the animal to move in a stereotypical pattern described as rolling. We find that environmental factors, including diet, early developmental arrest, and population density can differentially influence the penetrance of rolling in these mutants. These effects are in part due to changes in collagen gene expression that are mediated by the GATA family transcription factor ELT-3. We propose a model by which ELT-3 regulates collagen gene expression in response to environmental stimuli to promote the assembly of a cuticle specialized to a given environment.
How do governments cope with austerity? The roles of accounting in shaping governmental financial resilience
Authors: Barbera Carmela , Guarini Enrico , Steccolini Ileana 
Published: March 2020

PurposeStudies on how accounting is involved in financial crises and austerity are limited. The context of austerity provides an interesting opportunity to explore the role of accounting in shaping governmental financial resilience, i.e. the capacity of governments to cope with shocks affecting their financial conditions.Design/methodology/approachBased on a multiple case analysis of eight Italian municipalities, this paper explores how accounting contributes to the government capacities which are used to anticipate and respond to shocks affecting public finances.FindingsMunicipalities cope with financial shocks differently; accounting can support self–regulation and can affect internally-led or externally-led adaptation. Different combinations of anticipatory and coping capacities lead to different responses to shocks.Practical implicationsThe findings can be useful for public managers, policymakers and oversight bodies for strengthening governmental financial resilience in the face of crises and austerity.Originality/valueThe results provide evidence of the conditions, contexts, processes under which accounting becomes a medium which can support both anticipation of and coping with financial shocks, supporting cuts in some cases and resistance in the short run or driving long-term changes intended to maintain public services as much intact as possible. This highlights the existence of different patterns of governmental financial resilience and thus indicates ways of best preserving the service of the public interest.
Non-profit organization’s innovative donor management-the identification of salient factors that drive donor loyalty
Authors: Middleton Gilroy Hughdonald , Lee Hyoung Tark 
Published: March 2020

Purpose
This study aims to progress knowledge by developing and analyzing an integrated model of behavioral loyalty enhancement related to non-profit organization (NPO) donation. To achieve this aim, the study examines the influences of three variables of donor loyalty, namely, attitude toward beneficiaries, trust and self-esteem in one integrated model. Additionally, to compare the extent to which each variable affects donor loyalty, mediating effects are suggested.

Design/methodology/approach
Data from 245 Korean donors are used to investigate the proposed conceptual model using structural equation modeling with AMOS.

Findings
Findings from the study demonstrate that trust has the highest mediating influence on the intention to continue donation. Similarly, the findings reveal that self-esteem has the highest mediating influence on positive word-of-mouth (PWOM). However, the study findings suggest that attitudes toward beneficiaries are not significant predictors of both intentions to continue donating and PWOM.

Research limitations/implications
The impact of trust on the intention to continue donating is more important than that of self-esteem and attitude toward the beneficiary.

Practical implications
Similarly, the impact of trust and self-esteem on positive WOM is more important than that of attitude toward beneficiary.

Social implications
With this research, NPOs can make more budget from personal donation efficiently.

Originality/value
The findings of this research provide evidence that there are three important components relative to donation, namely, donor, NPO and beneficiary, and propose an integrated model which is composed of these three key components.
Financial performance of Hungarian and Romanian retail food small businesses
Authors: Fenyves Veronika , Zsido Kinga Emese , Bircea Ioan , Tarnoczi Tibor 
Published: March 2020

PurposeChanges in food retailing (globalization, concentration) have negative impacts on smaller, “traditional” food retail businesses. Their market share decreasing year by year. The purpose of this study is to examine and compare the financial performances of these businesses under the given circumstances and current economic environment in a Hungarian and a Romanian county.Design/methodology/approachThe study is based on two complete databases, including all companies that behoove retail food activity (considering the NACE cod) in the counties of Hajdu-Bihar (Hungary) and Cluj (Romania). The database analyzed contains the financial statements for five consecutive years for 212 and 690 businesses. Databases were examined by the most typical financial indicators using the multivariate and univariate analysis of variance and the k-medoid cluster analysis methods.FindingsThe results of the analysis have shown that there are differences in the number of retail food companies in the case of two counties, both in number and in financial performance. Companies in Hajdú-Bihar county perform better in terms of financial ratios than those in Cluj county. The groups created by k-medoids cluster analysis are relatively well distinguished in the case of Hajdú-Bihar county, while the picture is much more mixed in the case of Kolozs county. However, it is also important to note that the companies analyzed should generally perform better to survive.Research limitations/implicationsAmong the limitations of the study, it is important to note that the findings are relevant only to the two counties examined. Another limiting factor is that quite several companies had to be excluded from the analysis due to missing data or outliers.Practical implicationsThe study presents for the corporate decision-makers the current performance of the companies of the sector examined in the two counties. The results of the study highlight the business areas of concern in management. The findings show that they need to change this performance to strengthen their market position. We believe that it is not enough to complain about the expansion of the supermarket chains, but they should take appropriate actions to improve their situation. Based on the results of the study, it can be concluded that there is a need to improve the financial efficiency of retail food companies in both counties to survive in the long run. This improvement is essential because retailers can play an important role in smaller settlements and narrower residential environments.Originality/valueComparative analysis of retail food companies in similar counties in these two neighboring countries has not been conducted using complex financial analysis. The study revealed the common and/or individual characteristics of these companies.
Fostering intrapreneurial behavior through human resource management system
Authors: Escribá-Carda Naiara , Revuelto-Taboada Lorenzo , Canet-Giner Maria Teresa , Balbastre-Benavent Francisco 
Published: March 2020

PurposeThis work aims to analyze the effect of employees' perceptions of high-performance work systems (HPWS) on intrapreneurial behavior (IPB), and the potential role of knowledge sharing as a mediating variable in this relationship.Design/methodology/approachHypothesis testing was performed using a structural equation model (SEM) based on a PLS-SEM approach applied to a sample of 297 knowledge-intensive employees from six industrial companies of the Valencian region (Spain).FindingsResults confirmed that the relationship between employees' perceptions of HPWS and IPB does not take place directly. Alternatively, this relationship occurs through knowledge sharing of employees.Originality/valueThis study makes theoretical and empirical contributions to better understand the impact of employee's perceptions of HPWS on IPB mediated by knowledge sharing. This work theorized and tested a model where the concept of IPB gains special relevance at academic and practical levels due to its implications for HRM.
The culture of UK employee-owned worker cooperatives
Authors: Wren David 
Published: March 2020

PurposeThis paper presents exploratory, empirical data from a three-year study of organizational culture in for-profit, employee-owned businesses within the UK, comparing ownership types (direct, trust, and cooperative). It outlines the study and then focuses on worker cooperatives. Culture is illuminated through the lens of performance and reward management.Design/methodology/approachQualitative data was gathered from three worker cooperatives based in the North of England, using semi-structured interviews, participant observation, and document review and was compared to qualitative data collected from other types of employee-owned businesses.FindingsThe findings suggest a distinct culture within worker cooperatives encompassing five key values: a whole life perspective, consistently shared values, self-ownership, self-control, and secure employment.Research limitations/implicationsAdditional time with each cooperative and a greater spread of cooperatives would be beneficial. The research was carried out during a period of organizational growth for the case organizations, which may influence attitudes to reward and retention management.Practical implicationsThe results inform recruitment and retention policy and practice within worker cooperatives and highlight concerns regarding the stresses of being a self-owner. These are important considerations for potential worker co-operatives alongside policy recommendations to advance employee ownership.Originality/valueA comparative analysis of culture, performance, and rewards across different employee ownership types has not been undertaken before. This addresses an under-researched area of employee ownership regarding HR practices. Within the UK, recent research on the culture(s) of worker cooperatives is limited.
Maternal health outcomes of socially marginalized groups in India
Authors: Yadav Arvind Kumar , Jena Pabitra Kumar 
Published: March 2020

PurposeThe present study delves into the health inequalities between the two most socially deprived groups namely Scheduled Tribes (STs) and Scheduled Castes (SCs) in rural India.Design/methodology/approachThis study used health-specific three rounds of National Sample Survey Office (NSSO) unit-level data for analyses. Probit model has been used to predict the differences in access to maternal healthcare services. Blinder–Oaxaca decomposition method is used to explore the inequality in health of rural population in India and assess the estimated relative contribution of socioeconomic and demographic factors to inequalities in maternal health.FindingsThe study establishes that STs women often perform poorly compared to SCs in terms of maternal health such as antenatal care, postnatal care and institutional delivery. Blinder–Oaxaca decomposition method shows that there exist health inequalities between STs and SCs women. Difference in household income contributes 21–34 percent and women's education 19–24 percent in the gap of utilization of maternal healthcare services between SCs and STs women. A substantial part of this difference is contributed by availability of water at home and geographical region. Finally, the study offers some policy suggestions in order to mitigate the health inequalities among socially marginalized groups of SCs and STs women in rural areas.Originality/valueThis study measures and explains inequalities in maternal health variables such as antenatal care, postnatal care and institutional delivery in rural India. Research on access to maternal healthcare facilities is needed to improve the health of deprived sections such as STs and SCs in India. The results of this study pinpoint the need for public health decision-makers in India to concentrate on the most deprived and vulnerable sections of the society. This study thus makes a detailed and tangible contribution to the current knowledge of health inequalities between the two most deprived social groups, i.e., SCs and STs.
Financial bootstrapping of informal micro-entrepreneurs in the financial environment
Authors: Khan Eijaz Ahmed , Quaddus Mohammed 
Published: March 2020

PurposeThis study first examines whether the capital structure served as a mediator between financing mix and firm performance. Furthermore, the authors investigate whether this mediation effect was moderated by the financial environment. Grounded in the pecking order theory (POT) and dynamic capability view (DCV), this study extends these concepts by configuring all links to a moderated mediation model.Design/methodology/approachThe study uses the structural equation modelling (SEM) approach and multiple regression analysis using “Hayes PROCESS macro” to empirically examine the model using data collected from 384 informal micro-firms operating in Bangladesh.FindingsIn the mediation analyses, results found that capital structure was a mediator in the link between financing mix and firm performance. In further moderated mediation analyses, outcomes confirmed that this mediation effect was moderated by the financial environment.Research limitations/implicationsThis investigation shows paths for future research including implications for theory advancement and intervention development.Originality/valueThis investigation offers the first step towards examining a moderated mediation effect, using POT and DCV, of the relationship between financial environment, financing mix, capital structure and firm performance.
Correlates of social media fatigue and academic performance decrement
Authors: Malik Aqdas , Dhir Amandeep , Kaur Puneet , Johri Aditya 
Published: March 2020

PurposeThe current study aims to investigate if different measures related to online psychosocial well-being and online behavior correlate with social media fatigue.Design/methodology/approachTo understand the antecedents and consequences of social media fatigue, the stressor-strain-outcome (SSO) framework is applied. The study consists of two cross-sectional surveys that were organized with young-adult students. Study A was conducted with 1,398 WhatsApp users (aged 19 to 27 years), while Study B was organized with 472 WhatsApp users (aged 18 to 23 years).FindingsIntensity of social media use was the strongest predictor of social media fatigue. Online social comparison and self-disclosure were also significant predictors of social media fatigue. The findings also suggest that social media fatigue further contributes to a decrease in academic performance.Originality/valueThis study builds upon the limited yet growing body of literature on a theme highly relevant for scholars, practitioners as well as social media users. The current study focuses on examining different causes of social media fatigue induced through the use of a highly popular mobile instant messaging app, WhatsApp. The SSO framework is applied to explore and establish empirical links between stressors and social media fatigue.
Effects of smart city service channel- and user-characteristics on user satisfaction and continuance intention
Authors: Abu Salim Taghreed , El Barachi May , Onyia Okey Peter , Mathew Sujith Samuel 
Published: March 2020

PurposeSmart city services (SCS) in contrast with other technology-based services, demand significant interaction and collaboration between the users and the service providers. This study examines the SCS delivery-channel characteristics and the users' personal (behavioral and demographic) characteristics that influence their satisfaction or dissatisfaction with the services, as well as their intention to adopt (i.e. continue using) the SCS-delivery channels.Design/methodology/approachA quantitative study using a structured questionnaire was conducted for this paper. The data-collection method was administered by emailing the survey to a list of 2,350 city/urban residents who are members of the two largest universities in the greater Dubai metropolis. A total of 600 completed responses (26 percent) were received back, while 580 useable responses (25 percent) were analyzed for this paper.FindingsOur initial findings suggest that contrary to popular belief, it is not only SCS channel factors that influence user satisfaction and continuance intention. SCS users' personal characteristics (such as their user innovativeness and control-seeking behavior) are also pivotal in determining their satisfaction and intention to continue or not continue using the SCS-delivery channels.Research limitations/implicationsThe paper argues that both SCS channel factors and SCS users' personal characteristics jointly influence the users' experience of the services and therefore jointly determine their satisfaction with the service as well as their SCS usage continuance intention. The result of our research gives important insights into users' behaviors toward the emerging SCS channels in general, and it will be of great value to architects and designers of Smart City technologies around the world.Practical implicationsThe paper argues that both SCS channel factors and SCS users' personal (behavioral and demographic) characteristics jointly influence the users' trials of the services, and therefore jointly determine their satisfaction with the service as well as their SCS usage continuance intention. The result of our research gives important insights into users' behavioral intentions toward the emerging SCS channels in general; and it will be of great value to architects and designers of Smart City technologies around the world.Originality/valueThis paper is one of the first few studies focused on investigating the antecedents of SCS usage behaviors in the Middle Eastern region.