bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure learning in coupled dynamical systems and dynamic causal modelling
Authors: Jafarian Amirhossein , Zeidman Peter , Litvak Vladimir , Friston Karl 
Published: October 2019

Identifying a coupled dynamical system out of many plausible candidates, each of which could serve as the underlying generator of some observed measurements, is a profoundly ill-posed problem that commonly arises when modelling real-world phenomena. In this review, we detail a set of statistical procedures for inferring the structure of nonlinear coupled dynamical systems (structure learning), which has proved useful in neuroscience research. A key focus here is the comparison of competing models of network architectures—and implicit coupling functions—in terms of their Bayesian model evidence. These methods are collectively referred to as dynamic causal modelling. We focus on a relatively new approach that is proving remarkably useful, namely Bayesian model reduction, which enables rapid evaluation and comparison of models that differ in their network architecture. We illustrate the usefulness of these techniques through modelling neurovascular coupling (cellular pathways linking neuronal and vascular systems), whose function is an active focus of research in neurobiology and the imaging of coupled neuronal systems.
This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences'.
Recent advances in coupled oscillator theory
Authors: Ermentrout Bard , Park Youngmin , Wilson Dan 
Published: October 2019

We review the theory of weakly coupled oscillators for smooth systems. We then examine situations where application of the standard theory falls short and illustrate how it can be extended. Specific examples are given to non-smooth systems with applications to the Izhikevich neuron. We then introduce the idea of isostable reduction to explore behaviours that the weak coupling paradigm cannot explain. In an additional example, we show how bifurcations that change the stability of phase-locked solutions in a pair of identical coupled neurons can be understood using the notion of isostable reduction.
This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences’.
Coupling in complex systems as information transfer across time scales
Authors: Paluš Milan 
Published: October 2019

Complex systems such as the human brain or the Earth's climate consist of many subsystems interacting in intricate, nonlinear ways. Moreover, variability of such systems extends over broad ranges of spatial and temporal scales and dynamical phenomena on different scales also influence each other. In order to explain how to detect cross-scale causal interactions, we review information-theoretic formulation of the Granger causality in combination with computational statistics (surrogate data method) and demonstrate how this method can be used to infer driver-response relations from amplitudes and phases of coupled nonlinear dynamical systems. Considering complex systems evolving on multiple time scales, the reviewed methodology starts with a wavelet decomposition of a multi-scale signal into quasi-oscillatory modes of a limited bandwidth, described using their instantaneous phases and amplitudes. Then statistical associations, in particular, causality relations between phases or between phases and amplitudes on different time scales are tested using the conditional mutual information. As an application, we present the analysis of cross-scale interactions and information transfer in the dynamics of the El Niño Southern Oscillation.
This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences’.
Anti-phase collective synchronization with intrinsic in-phase coupling of two groups of electrochemical oscillators
Authors: Sebek Michael , Kawamura Yoji , Nott Ashley M. , Kiss István Z. 
Published: October 2019

The synchronization of two groups of electrochemical oscillators is investigated during the electrodissolution of nickel in sulfuric acid. The oscillations are coupled through combined capacitance and resistance, so that in a single pair of oscillators (nearly) in-phase synchronization is obtained. The internal coupling within each group is relatively strong, but there is a phase difference between the fast and slow oscillators. The external coupling between the two groups is weak. The experiments show that the two groups can exhibit (nearly) anti-phase collective synchronization. Such synchronization occurs only when the external coupling is weak, and the interactions are delayed by the capacitance. When the external coupling is restricted to those between the fast and the slow elements, the anti-phase synchronization is more prominent. The results are interpreted with phase models. The theory predicts that, for anti-phase collective synchronization, there must be a minimum internal phase difference for a given shift in the phase coupling function. This condition is less stringent with external fast-to-slow coupling. The results provide a framework for applications of collective phase synchronization in modular networks where weak coupling between the groups can induce synchronization without rearrangements of the phase dynamics within the groups.
This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences’.
Inferring the dynamics of rising radical right-wing party support using Gaussian processes
Authors: Blomqvist Björn R. H. , Sumpter David J. T. , Mann Richard P. 
Published: October 2019

The use of classical regression techniques in social science can prevent the discovery of complex, nonlinear mechanisms and often relies too heavily on both the expertise and prior expectations of the data analyst. In this paper, we present a regression methodology that combines the interpretability of traditional, well used, statistical methods with the full predictability and flexibility of Bayesian statistics techniques. Our modelling approach allows us to find and explain the mechanisms behind the rise of Radical Right-wing Populist parties (RRPs) that we would have been unable to find using traditional methods. Using Swedish municipality-level data (2002–2018), we find no evidence that the proportion of foreign-born residents is predictive of increases in RRP support. Instead, education levels and population density are the significant variables that impact the change in support for the RRP, in addition to spatial and temporal control variables. We argue that our methodology, which produces models with considerably better fit of the complexity and nonlinearities often found in social systems, provides a better tool for hypothesis testing and exploration of theories about RRPs and other social movements.This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences’.
The Golgi Glycoprotein MGAT4D is an Intrinsic Protector of Testicular Germ Cells From Mild Heat Stress
Authors: Akintayo Ayodele , Liang Meng , Bartholdy Boris , Batista Frank , Aguilan Jennifer , Prendergast Jillian , Sundaram Subha , Stanley Pamela 
Published: October 2019

AbstractMale germ cells are sensitive to heat stress and testes must be maintained outside the body for optimal fertility. However, no germ cell intrinsic mechanism that protects from heat has been reported. Here, we identify the germ cell specific Golgi glycoprotein MGAT4D as a protector of male germ cells from heat stress. Mgat4d is highly expressed in spermatocytes and spermatids. Unexpectedly, when the Mgat4d gene was inactivated globally or conditionally in spermatogonia, or mis-expressed in spermatogonia, spermatocytes or spermatids, neither spermatogenesis nor fertility were affected. On the other hand, when males were subjected to mild heat stress of the testis (43°C for 25 min), germ cells with inactivated Mgat4d were markedly more sensitive to the effects of heat stress, and transgenic mice expressing Mgat4d were partially protected from heat stress. Germ cells lacking Mgat4d generally mounted a similar heat shock response to control germ cells, but could not maintain that response. Several pathways activated by heat stress in wild type were induced to a lesser extent in Mgat4d[−/−] heat-stressed germ cells (NFκB response, TNF and TGFβ signaling, Hif1α and Myc genes). Thus, the Golgi glycoprotein MGAT4D is a novel, intrinsic protector of male germ cells from heat stress.
ROGUE: an entropy-based universal metric for assessing the purity of single cell population
Authors: Liu Baolin , Li Chenwei , Li Ziyi , Ren Xianwen , Zhang Zemin 
Published: October 2019

AbstractSingle-cell RNA sequencing (scRNA-seq) is a versatile tool for discovering and annotating cell types and states, but the determination and annotation of cell subtypes is often subjective and arbitrary. Often, it is not even clear whether a given cluster is uniform. Here we present an entropy-based statistic, ROGUE, to accurately quantify the purity of identified cell clusters. We demonstrated that our ROGUE metric is generalizable across datasets, and enables accurate, sensitive and robust assessment of cluster purity on a wide range of simulated and real datasets. Applying this metric to fibroblast and B cell datasets, we identified additional subtypes and demonstrated the application of ROGUE-guided analyses to detect true signals in specific subpopulations. ROGUE can be applied to all tested scRNA-seq datasets, and has important implications for evaluating the quality of putative clusters, discovering pure cell subtypes and constructing comprehensive, detailed and standardized single cell atlas.
Regenerative capacity inDrosophilaimaginal discs is controlled by damage-responsive, maturity-silenced enhancers
Authors: Harris Robin E. , Stinchfield Michael J. , Nystrom Spencer L. , McKay Daniel J. , Hariharan Iswar K. 
Published: October 2019

SummaryLike tissues of many organisms,Drosophilaimaginal discs lose the ability to regenerate as they mature. This loss of regenerative capacity coincides with reduced damage-responsive expression of multiple genes needed for regeneration. Our previous work showed that two such genes,wgandWnt6, are regulated by a single damage-responsive enhancer, which becomes progressively inactivated via Polycomb-mediated silencing as discs mature. Here we explore the generality of this mechanism, and identify numerous damage-responsive, maturity-silenced (DRMS) enhancers, some near genes known to be required for regeneration such asMmp1, as well as near genes that we now show function in regeneration. Using a novel GAL4-independent tissue ablation system we characterize two DRMS-associated genes,apontic(apt), which curtails regeneration and CG9752/asperous (aspr), which promotes it. This mechanism of suppressing regeneration by silencing damage-responsive enhancers at multiple loci can be partially overcome by reducing activity of the chromatin regulatorextra sex combs(esc).
Functionally Nb graded inconel 718 alloys fabricated by laser melting deposition: mechanical properties and corrosion behavior
Authors: Ni Xiaoqing , Zhang Liang , Wu Wenheng , Zhu Dexiang , Kong Decheng , Dong Chaofang , Zhu Guoliang 
Published: October 2019

Purpose
Laser melting deposition (LMD) is an advanced additive manufacturing (AM) technology without powder waste, and nickel-based alloys with different Nb contents were created one-time by adjusting the ratio of mixed powders via a dual-feed system. Here, the authors provide a systematic report on the effects of the Nb content on the microstructure, Laves phase segregation and mechanical properties of as-received LMD nickel-based alloys. The effects of the Nb content on the microstructure, precipitation evolution and mechanical properties of the subsequent heat-treated LMD samples are also discussed in this paper.

Design/methodology/approach
Thus, the present research aims to obtain a better understanding of the effect of Nb content on the microstructural and mechanical properties of the as-received LMD Inconel 718 alloys through high-throughput sample fabrication. The microstructures were characterized by scanning electron microscopy and energy-dispersive spectroscopy, electron back-scattered diffraction and transmission electron microscopy methods. The mechanical properties were obtained from compressive tests and nano-indentation tests. Electrochemical tests, including electrochemical impedance spectroscopy and potentiodynamic polarizations, were carried out to evaluate the durability of the Inconel 718 alloys. Results can provide a factual basis for future applications of the functionally graded by AM technology.

Findings
The grain size of the as-received LMD Inconel 718 alloys decreased with the Nb content. The Laves phase distribution at the macro level was relatively uniform and the Laves phase exhibited a 1.5-fold nano-hardness compared with the matrix. The strength improvement for the as-received LMD Inconel 718 alloys with Nb content was attributed to grain refinement and enhancement of the Laves phase in terms of both hardness and content. Meanwhile, the corrosion resistance increased with the increase of the Nb content, especially for the pitting potential, which was attributed to the optimization of carbide precipitates due to the strong affinity between niobium and carbon.

Originality/value
The results provide a factual basis for the Nb content effect in LMD nickel-based alloys, and this method can greatly promote the development of new materials. The authors believe that this study makes a significant contribution to the literature and is suitable for publication.
Accepting or rejecting the label: how gay employees cope with harassment at work
Authors: Liyanage Dilusha Madushanka , Adikaram Arosha 
Published: October 2019

Purpose
The purpose of this paper is to understand how gay employees, as labeled deviants, cope with heterosexist harassment at work in an Asian culture of hegemonic heterosexual masculinity, using the modified labeling theory.

Design/methodology/approach
Using qualitative research approach, in-depth interviews were carried out with 16 self-identified gay employees.

Findings
Results revealed how the coping strategies of gay employees, in the face of harassment, are entwined with the labeling and stigma leading to diverse and complex coping strategies. Several broader coping strategies were thus identified based on whether the participants accepted the label of deviance and stigma and whether they were open about their sexuality. These broader coping strategies are support seeking, confrontation, inaction, quitting and, stigma and labeling avoidance strategies. Under these broader strategies, there were also sub strategies such as seeking social support, organizational support, legal support the support of the wise, as well as secrecy and social withdrawal.

Originality/value
These findings will advance the knowledge in coping strategies of heterosexist harassments at work as well as knowledge in harassment of gay employees, in hegemonic heterosexual cultures.
The moderating effect of e-bank structure on French consumers’ trust
Authors: Kaabachi Souheila , Ben Mrad Selima , Fiedler Anne 
Published: October 2019

Purpose
The purpose of this paper is to demonstrate how an e-bank’s structure (click-and-mortar bank vs internet-only bank) influences the consumer’s evaluation of website quality, and to identify the most significant website features that influence online trust and lead to consumer loyalty.

Design/methodology/approach
A non-probability convenience sample of 476 online bank users (248 click-and-mortar and 230 internet-only bank users) was used in this study. An online survey was conducted. Structural equation modeling and multi-group analysis were used to analyze the data.

Findings
Findings suggest that e-trust and e-loyalty levels depend on the e-banking structure. Click-and-mortar-based online users were found to have more trust and loyalty in their online banks than internet-only bank users. Findings demonstrate that website features are evaluated differently according to the e-bank structure. Information design and interactivity are very important for internet-only banks, and their effect on online trust seems to be higher. On the other hand, website personalization was evaluated as more important for click-and-mortar banks and had a stronger impact on online trust.

Practical implications
To promote the trustworthiness of their websites and retain customers, internet-only banks should make the experience more tangible for users by developing a pleasant online experience. Personalization is an important variable that can enhance the consumer’s engagement with the brand. Click-and-mortar banks should enhance their interactivity by providing a continuous and consistent experience across different channels of distribution whether online or in-person and provide more interactive tools on their websites.

Originality/value
This study contributes significantly to the marketing research literature related to consumer trust as well as to the electronic banking literature. It is the first study to compare customers of click-and-mortar banks with customers of internet-only banks when evaluating website features. It also explores the impact of the e-bank model on the relationship between website features and online trust and customer loyalty.
Fuzzy Markov development for buried transportation bridges
Authors: Gharehbaghi Koorosh , McManus Kerry , Robson Kathryn , Eves Chris , Myers Matt 
Published: October 2019

Purpose
The purpose of this paper is to review the Fuzzy Markov development for assessing the structural integrity of buried transportation bridges. In doing so, the appropriateness of Fuzzy Markov will be assessed, leading to the subsequent model.

Design/methodology/approach
This research will utilize the Fuzzy Markov techniques as the conceptual framework. Such methodology is further supported via the utilization and evaluation of 30 buried transportation bridges using the developed Fuzzy Markov model.

Findings
Subsequently, through a developed Fuzzy Markov model, this research found that as the basis of structural resilience, specific matrices for age-dependent transition probability can be compiled using conditional survival probabilities in the various structural states; as the basis of structural integrity, specific environmental and economic schemes can also be established based on inspection intervals, intervention systems and failure phases; exact inspection and maintenance intervals can be scheduled to further prolong an asset’s life; and clear and early warning signs can also be formulated for immediate intervention when the structural integrity of the asset are indeed compromised.

Originality/value
The gap within the literature currently surrounds the limitation of computational analysis for some buried structures such as bridges. Specifically, to streamline such evaluation and regimes, a Fuzzy Markov is developed and reviewed.
The Airbnb phenomenon: the resident’s perspective
Authors: Richards Steven , Brown Lorraine , Dilettuso Alessandra 
Published: October 2019

PurposeMedia and academic attention on Airbnb focuses on user experiences, implications for traditional accommodation establishments and negative sociocultural impacts. The purpose of this paper is to explore the views of Barcelona residents who have been impacted by the proliferation of Airbnb rentals.Design/methodology/approachA qualitative approach was adopted, involving semi-structured interviews with residents of Barcelona.FindingsIt highlights the problem of unregistered Airbnb rentals throughout the city, carrying implications for the gentrification of neighbourhoods, the displacement of local residents and anti-social guest behaviour. This study points to a consequent rise in anti-tourist feeling. It also reveals that the authentic experience promised by the sharing economy is illusory.Originality/valueThis paper presents a model that highlights a clash between the vaunted benefits of the sharing economy for hosts and tourists and the negative implications for a city’s residents.
Husband’s international migration
Authors: Shwe Win Win , Jampaklay Aree , Chamratrithirong Aphichat , Thaweesit Suchada 
Published: October 2019

Purpose
The purpose of this paper is to understand the effects of the husband’s migration on wives’ decision-making autonomy.

Design/methodology/approach
The study setting is Magway Region of central Myanmar where poverty has driven adult males to migrate overseas. The study hypothesizes that the absence of husbands due to international migration leads to changes in the roles and decision-making power of left-behind wives. A cross-sectional survey was conducted in 22 villages of Pakkoku district, Magway Region, using the multi-stage random sampling method. The study sample included 205 migrant’s wives and 196 non-migrant’s wives.

Findings
The international migration of husbands has a strong and positive impact on left-behind wives’ autonomy independent of individual characteristics and household social and economic status. In addition, the findings show that the number of children and household wealth are positively associated with women’s autonomy, whereas household size shows a negative association.

Research limitations/implications
It is possible that there will be unmeasured selection factors such as unsuccessful migration as it might influence both husbands’ migration status and women’s autonomy. Cross-sectional data also invite a question about the causal relationship. For example, it might be possible that women with high autonomy may be more likely to encourage their husband to work abroad. So, the relationship might be the other way around. A further longitudinal study is also needed to describe detail explanation about the causal influence of left-behind women’s autonomy.

Originality/value
Successful international migration has a impact not only on women’s autonomy but also on household economic status in central rural Myanmar.
The effect of talent management processes on knowledge creation
Authors: Mohammed Atheer Abdullah , Baig Abdul Hafeez , Gururajan Raj 
Published: October 2019

Purpose
The purpose of this paper is to develop a theoretical model and investigate the relationship between talent management (TM) processes and knowledge creation (KC) in Australian public and private universities. This is because of the pragmatic advantages for organisations that focus on talents and knowledge.

Design/methodology/approach
This research adopted the mixed-methods design. The sample comprised 23 individuals for the qualitative study and 286 individuals for the quantitative survey questionnaire, all conducted in nine public and private universities in Australia.

Findings
The qualitative outcomes were utilised to develop the quantitative survey statement. These outcomes are based on a three-stage method of thematic analysis. The core conclusion of the quantitative study is that there is a significantly positive influence on TM processes (TMPs) on KC.

Research limitations/implications
The principle limitation of this study was the scope. It only targeted one country (Australia), one state (Queensland) and a part of the higher education sector (the university).

Practical implications
This research designed a quantitative instrument of TMPs and KC for the Australian educational institutions. The instrument is severely designed and comprehensively conceptualised utilising social, excellent, performance, strategic, behavioural and developmental concepts within TMPs with innovative, informational and technological concepts underlining KC within the Australian public and private universities in Queensland.

Originality/value
The study adds value to both TM and knowledge management literature through designing a conceptual model that links both of these variables in one tool regarding the university sector.