bluuebunny/crossref_metadata_2025_split huggingface dataset:
Perceptions of social loafing during the process of group development
Authors: Zhu Min , Singh Satvir , Wang Huaqing 
Published: March 2020

Purpose
The purpose of this paper is to extend the social loafing literature by investigating the role of group development process on perceptions of social loafing within groups. Building on extant literature, it is contended that group members’ association with the group development stages can help in predicting their perceptions of social loafing.

Design/methodology/approach
Using a cross-sectional survey data were collected from 164 individuals nested in 39 groups. Mixed-effect modeling in R was unitized to test the proposed hypotheses.

Findings
Results of mixed-effect modeling in R show that group development stage of inclusion and dependency (stage 1) has no significant effect on perceptions of social loafing. Whereas, group development stage of counterdependency and fight (stage 2) has positive, and trust and structure (stage 3) and work (stage 4) has negative effect on perception of social loafing by group members.

Originality/value
This study investigates unique relationships between group members’ association with different stages of group development and their perceptions of social loafing. Additionally, a newer, shorter and cost-effective scale to measure four stages of group development is developed.
How ethnic cultures influence practice-based learning
Authors: Lui Kwok Wah Ronnie , Choy Sarojni 
Published: March 2020

PurposeThis paper aims to report on a study that used the practice theory lens to understand how Chinese ethnic culture influences restaurant workers' learning through engagement in everyday work practices.Design/methodology/approachA multiple case study approach was used. Data were collected from semi-structured interviews and site observations. Thematic analysis was conducted to identify how workers learnt the sayings, doings and relatings in their workplaces.FindingsThe findings show that the ethnic culture of the participants influences and enriches their learning in practice settings such as small Chinese restaurants.Research limitations/implicationsThe understandings presented here need to be verified through more research in different regions and nations. In addition, cross-cultural studies on other ethnic restaurants may contribute to deeper understandings of the influences of ethnic culture on practice-based learning.Social implicationsThe research contributes to understanding the influence of ethnic culture on practice-based learning.Originality/valueThe understandings gained from the findings of this study form a useful basis for curriculum development and instructional design of training programmes for practice-based as well as work-integrated-learning components of vocational curriculum. Furthermore, awareness of the strengths of the ethnic culture is of interest to owner/managers of small Chinese restaurants to afford supportive learning environments for workers.
Green supply chain management and innovation: a modern review
Authors: Carvalho Lucas Silvestre de , Stefanelli Nelson Oliveira , Viana Lilian Carolina , Vasconcelos Diogo de Siqueira Camargo , Oliveira Bruno Garcia 
Published: March 2020

PurposeThis paper aims to investigate the main associations between research regarding innovation and green supply chain management (GSCM).Design/methodology/approachFor this the study sought to (1) present the most cited authors in the area; (2) demonstrate the main localities that develop research with this focus; (3) list the main journals with the published research on the themes. The methodology used was a bibliometric survey using the Scopus database as the data source. The VOSviewer® software was used to perform the analysis of the database from the respective DOI® of each article.FindingsAs results of the research, it is possible to demonstrate the existence of an agglomeration of countries that are interrelated in the development of research on these themes, especially China, the United States and the United Kingdom as the main foundations of this center.Originality/valueThis paper evidences the direction of scientific research within the analyzed area, demonstrating where there is convergence for innovation in actions related to GSCM. This guidance may demonstrate possible existing and unexplored gaps so that researchers can direct future research or check gaps to be filled by the development of new processes.
Conditional violation of weak-form market efficiency
Authors: Jansen Benjamin 
Published: March 2020

PurposeMany prior tests of market efficiency, which occurred decades ago, were limited by data and did not employ methodology to correct for leptokurtosis in the stock return distribution. Furthermore, these studies did not test many aspects of conditional market efficiency. One aspect of a potential conditional violation of market efficiency is whether stock markets are efficient conditional on the level of stock return.Design/methodology/approachThis paper uses quantile regressions to control for leptokurtosis in the stock return distribution and simultaneous quantile regressions to test whether markets are efficient conditional on the level of the market return. This paper uses market-level stock return data to bias against finding significant results in the efficiency tests. Furthermore, the author uses data from 1926 through 2018, providing the longest time period to date under which market efficiency is tested.FindingsThis paper presents evidence that the autoregressive coefficient decreases across return levels in stock market indices. The autoregressive coefficient is positive around highly negative returns and negative or insignificant around highly positive returns, which suggests that when stock returns are low they are more likely to continue lower, and when stock returns are high they are more likely to reverse. Results additionally suggest that market efficiency is not time-invariant and that stock markets have become more efficient over the sample period.Originality/valueThis paper extends the literature by finding evidence of a violation of weak-form market efficiency conditional on the level of stock returns. It further extends the literature by finding evidence that the stock market has become more efficient between 1926 and 2018.
The impact of leverage on the cost of capital and market value
Authors: Battisti Enrico , Bollani Luigi , Miglietta Nicola , Salvi Antonio 
Published: March 2020

Purpose
This paper aims to investigate the impact of leverage on the cost of capital and market value in the Indonesia Stock Exchange (IDX), where there are Sharīʿah and non-Sharīʿah compliant firms.

Design/methodology/approach
This study uses a mixed methods sequential exploratory design and is based on an empirical analysis undertaken with a sample of firms listed on the IDX. In particular, a qualitative analysis was conducted to identify the Sharīʿah-compliant firms and the qualitative study was designed to compare some financial elements in Sharīʿah and non-Sharīʿah compliant listed companies. The correlations among the main elements observed are considered and a principal component analysis describes the framework.

Findings
First, the results of the analysis show that for the Sharīʿah-compliant companies, identified as those that apply Islamic principles, the lower level of leverage that it is typical of these type of firms implies a higher cost of capital [cost of equity and weighted average cost of capital (WACC)] than non-Sharīʿah ones. Secondly, for the Sharīʿah-compliant companies, the lower level of leverage entails a higher market value measured by the multiples method (price/earning and enterprise value/operating profit) than for non-Sharīʿah ones.

Originality/value
This paper sheds new light on how leverage can affect the cost of capital and market value in the case of Sharīʿah and non-Sharīʿah compliant listed companies in the IDX. In particular, this research highlights the fact that Sharīʿah-compliant firms, despite having a higher WACC, create more market value compared to non-Sharīʿah compliant ones.
Gender, workplace support, and perceived job demands in the US and Indian context
Authors: Banerjee Dina , Doshi Vijayta 
Published: March 2020

PurposeThe purpose of this paper is to explore the under-researched dynamics of gender, workplace support, and perceived job demands in two different contexts, the United States and India.Design/methodology/approachThe paper draws from two studies conducted in different contexts (the United States and India) via different methodological approaches (quantitative and qualitative, respectively). In Study I of this paper, data was collected using questionnaires from a nationally representative sample of adult workers in the United States. In Study II, interviews were conducted with 48 workers in India, selected using convenience sampling.FindingsIt was found that both in the United States and India, women perceived considerably greater job demands than men. In terms of workplace support, both the studies found that workplace culture and supervisors’ support influenced the perception of job demands, but the same was not true for coworkers’ support, which mainly helped in coping rather than actually reducing the perception of job demands.Research implicationsThe article contributes to research by concluding that job demands as a construct are not clearly segregated from gender demands or expectations, especially in the way women “perceive” it. Women construct job demands as “job-family” demands and workplace support as “job-family” support. Moreover, being a woman in the workplace, women feel the “burden” of gender.Practical implicationsIt would be useful for organizations and policy makers to understand that women remain “conscious” of their gender in the workplace, and for them, the meaning of job demands and workplace support are “job-family” demands and “work-family” support, respectively.Social implicationsThis research intends to contribute toward thinking about gender relations and empowerment of people within organizational and work settings from a new light.Originality/valueThe present study provides an alternative way of thinking about gender, job demands, and workplace support. Its value underlies in the way it raises the voices of women workers.
Collusion with intertemporal price dispersion
Authors: de Roos Nicolas , Smirnov Vladimir 
Published: March 2020

AbstractWe develop a theory of optimal collusive intertemporal price dispersion. Dispersion clouds consumer price awareness, encouraging firms to coordinate on dispersed prices. Our theory generates a collusive rationale for price cycles and sales. Patient firms can support optimal collusion at the monopoly price. For less patient firms, monopoly prices must be punctuated with fleeting sales. The most robust structure involves price cycles that resemble Edgeworth cycles. Low consumer attentiveness enhances the effectiveness of price dispersion by reducing the payoff to deviations involving price reductions. However, for sufficiently low attentiveness, price rises are also a concern.
Enhanced glucose metabolism mediated by CD147 is associated with 18F‐FDG PET/CT imaging in lung adenocarcinoma
Authors: Zhang Yufan , Liu Jianjing , Sun Yunchuan , Yu Xiaozhou , Wang Jian , Dai Dong , Zhu Yanjia , Song Xiuyu , Zhu Lei , Li Xiaofeng , Xu Wengui 
Published: March 2020

BackgroundLung adenocarcinoma (LUAD) is one of the most deadly thoracic tumors. Reprogrammed glycolytic metabolism is a hallmark of cancer cells and significantly affects several cellular functions. In the current study, we aimed to investigate cluster of differentiation 147 (CD147)‐mediated glucose metabolic regulation in LUAD and its association with 18F‐FDG PET/CT imaging.MethodsThe expression profile and prognostic potential of CD147 in LUAD were analyzed using UALCAN and a Kaplan‐Meier plotter. Tissue immunohistochemical analyses and PET metabolic parameters were used to identify the relationship between CD147 expression and reprogrammed glycolysis. The role of CD147 in glucose metabolic reprogramming was assessed by radioactive uptake of 18F‐FDG through γ‐radioimmunoassays in vitro and micro‐PET/CT imaging in vivo. Western blotting assays were used to determine the expression level of monocarboxylate transporter 1 (MCT1) and MCT4 in established human LUAD cell lines (ie, HCC827 and H1975) with different CD147 expression levels via lentiviral transduction.ResultsCD147 was highly expressed in LUAD. A significant positive correlation existed between CD147 expression and PET metabolic parameters(SUVmax,SUVmean, SUVpeak). CD147 could promote radioactive uptake of 18F‐FDG in vitro and in vivo, suggesting the ability of CD147 to enhance glycolytic metabolism. Furthermore, as an obligate chaperone for MCT1 and MCT4, CD147 positively correlated with MCT1 and MCT4 expression in LUAD tissues and established cell lines with different CD147 expression.ConclusionsOur study revealed that CD147 is a promising novel target for LUAD treatment and CD147‐mediated glucose metabolism demonstrated its contribution to the predictive role of 18F‐FDG PET/CT imaging for targeted therapeutic efficacy.
Busy directors and firm performance: a replication and extension of Hauser (2018)
Authors: Daniliuc Sorin , Li Lingwei , Wee Marvin 
Published: March 2020

AbstractWe replicate the 2018 study by Hauser and examine whether director appointments impact firm performance by exploiting the exogenous reduction in board appointments generated by mergers that terminate target boards. Using an extended sample, we find increases in return on assets and Tobin’s q for firms with a reduction in board appointments (i.e., treated firms), confirming the results in Hauser’s study. In further analysis, we find greater improvements in firm performance when the target and treated firms are from different industries than if they are from the same industry. The results further demonstrate that director appointments influence firm performance via a workload channel.
The mating strategy and reproductive performance of Agriphila aeneociliella (Lepidoptera: Crambidae), a new insect pest of wheat in China
Authors: Zhan Yidi , Liu Jiahui , Liu Yong 
Published: March 2020

Abstract
The Eastern Grass‐veneer Agriphila aeneociliella (Eversmann) (Lepidoptera: Crambidae) is a serious stem‐feeding pest of wheat crops that has become established in China in recent years. A better understanding of the mating strategy and reproductive performance of A. aeneociliella could improve integrated pest management programmes against this newly established species by disturbing its behaviour and reducing its reproduction potential. Based on ethological and reproductive biological approaches, the mating and reproductive performances of A. aeneociliella were investigated.
Unlike the common nocturnal lepidopterans, the mating rhythm of A. aeneociliella moths showed a marked diurnal pattern. The female courtship rhythm and the mating rhythm reached peaks within the first 2 h after the onset of photocycle.
The mating success rate of monogamous pairs was 55.6%, whereas the male‐biased sex ratio (2♂:1♀) increased the mating rate (72.2%) and the female‐biased ratio (1♂:3♀) led to the lowest mating rate (27.8%).
Both females and males were able to mate twice. The duration of copulation decreased substantially with male mating frequency, whereas, when a previously mated female was paired with a virgin male, fecundity significantly increased. Monogamous couples who mated only once in their lives have the highest hatchability (97.13 ± 0.49%).
Optimization of fermentation conditions for the production of epothilone B
Authors: Long Rong , Yang Wenjian , Huang Gangliang 
Published: March 2020

AbstractEpothilone is a macrolide secondary metabolite which has the same anticancer effect as paclitaxel. Based on a series of single‐factor experiments, four factors, temperature, initial pH, rotation speed, and inoculum quantity, which have the greatest influence on yield, were determined. Four factors were designed and orthogonal experiments were carried out to optimize the fermentation conditions. Finally, the best experimental conditions were obtained as follows: 250 ml flapper triangular flask was used. The yield of epothilone B was 39.76 mg/L at 30℃, initial pH = 7.4, rotating speed 200 r/min, inoculation amount 10%, liquid loading amount 50 ml/250 ml, fermentation time 6 days and seed age 60 hr.
Clinical implications of experimental analyses of AID function on predictive computational tools: Challenge of missense variants
Authors: Abolhassani Hassan , Marcotte Harold , Fang Mingyan , Hammarström Lennart 
Published: March 2020

AbstractDue to the increased usage of high throughput sequencing for the diagnosis of genetically inherited disorders, it is vital to evaluate the risk of new variants and novel genes before accepting them in clinical practice. However, discordant in silico and in vitro results, challenge estimations of the effect of an identified genetic variant. We aimed to comprehensively evaluate pathogenic and polymorphic variants using the activation‐induced‐cytidine‐deaminase (AICDA) gene as a model. We systematically searched and identified patients with confirmed AICDA‐mutations. Population‐based‐databases were screened for germline‐polymorphic‐AICDA‐variants. Activity of AICDA‐mutant and severity of the clinical and immunologic‐phenotype were showed comparing 108 population‐based‐variants with 48 pathogenic mutations (12 overlapping‐variants). Discordant predictions of different algorithms were observed on average in 38% of the population‐database variants, mainly for missense mutations. Functional activity in mutations observed only in patients was significantly lower than variants in the population databases and overlapping‐variants between patients and the general‐population. Surprisingly, overlapping‐variants had an even higher functional activity than the most common polymorphic‐variants; however, their pathogenicity was still distinguishable when their function was compared with wild‐type AICDA. Classifications of genetic variants cannot readily be translated into a clinical implication. Combined databases of functional and computational assays should therefore be developed for each specific gene.
Microtubule disrupting agent‐mediated inhibition of cancer cell growth is associated with blockade of autophagic flux and simultaneous induction of apoptosis
Authors: Hasanain Mohammad , Sahai Rohit , Pandey Praveen , Maheshwari Mayank , Choyal Kuldeep , Gandhi Deepa , Singh Akhilesh , Singh Kavita , Mitra Kalyan , Datta Dipak , Sarkar Jayanta 
Published: March 2020

AbstractObjectivesGiven that autophagy inhibition is a feasible way to enhance sensitivity of cancer cells towards chemotherapeutic agents, identifying potent autophagy inhibitor has obvious clinical relevance. Here, we investigated ability of TN‐16, a microtubule disrupting agent, on modulation of autophagic flux and its significance in promoting in vitro and in vivo cancer cell death.Materials and methodsThe effect of TN‐16 on cancer cell proliferation, cell division, autophagic process and apoptotic signalling was assessed by various biochemical (Western blot and SRB assay), morphological (TEM, SEM, confocal microscopy) and flowcytometric assays. In vivo anti‐tumour efficacy of TN‐16 was investigated in syngeneic mouse model of breast cancer.ResultsTN‐16 inhibited cancer cell proliferation by impairing late‐stage autophagy and induction of apoptosis. Inhibition of autophagic flux was demonstrated by accumulation of autophagy‐specific substrate p62 and lack of additional LC3‐II turnover in the presence of lysosomotropic agent. The effect was validated by confocal micrographs showing diminished autophagosome‐lysosome fusion. Further studies revealed that TN‐16–mediated inhibition of autophagic flux promotes apoptotic cell death. Consistent with in vitro data, results of our in vivo study revealed that TN‐16–mediated tumour growth suppression is associated with blockade of autophagic flux and enhanced apoptosis.ConclusionsOur data signify that TN‐16 is a potent autophagy flux inhibitor and might be suitable for (pre‐) clinical use as standard inhibitor of autophagy with anti‐cancer activity.
von Willebrand factor D and EGF domains is an evolutionarily conserved and required feature of blastemas capable of multitissue appendage regeneration
Authors: Leigh Nicholas D. , Sessa Sofia , Dragalzew Aline C. , Payzin‐Dogru Duygu , Sousa Josane F. , Aggouras Anthony N. , Johnson Kimberly , Dunlap Garrett S. , Haas Brian J. , Levin Michael , Schneider Igor , Whited Jessica L. 
Published: March 2020

AbstractRegenerative ability varies tremendously across species. A common feature of regeneration of appendages such as limbs, fins, antlers, and tails is the formation of a blastema—a transient structure that houses a pool of progenitor cells that can regenerate the missing tissue. We have identified the expression of von Willebrand factor D and EGF domains (vwde) as a common feature of blastemas capable of regenerating limbs and fins in a variety of highly regenerative species, including axolotl (Ambystoma mexicanum), lungfish (Lepidosiren paradoxa), and Polpyterus (Polypterus senegalus). Further, vwde expression is tightly linked to the ability to regenerate appendages in Xenopus laevis. Functional experiments demonstrate a requirement for vwde in regeneration and indicate that Vwde is a potent growth factor in the blastema. These data identify a key role for vwde in regenerating blastemas and underscore the power of an evolutionarily informed approach for identifying conserved genetic components of regeneration.