bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bridging indistinct relationships and online loyalty: evidence from online interest-based communities
Authors: Chen Chun-Der , C.S. Ku Edward 
Published: September 2013

Purpose
– Bridging indistinct relationships and online loyalty has become an important strategy for online interest-based communities' operators and firms. The objective of this study is to draw on the elaboration likelihood model (ELM) to advance our understanding of the influences on the development of relationship quality and the consequent impact on members' loyalty to online communities.

Design/methodology/approach
– To test the hypotheses the authors identified and selected four interest-based online communities in Taiwan. The online survey yielded 331 completed questionnaires from members of interest-based online communities and the authors analysed the results using the structural equation modelling approach.

Findings
– The findings show that argument quality and source credibility positively affect members' perceived relationship quality, which has a positive and significant effect on behavioural loyalty, and personal relevance and user expertise positively moderate the relationship between argument quality and relationship quality and negatively moderate the relationship between source credibility and relationship quality.

Research limitations/implications
– While this study has produced meaningful insights for investigating the informational processing influences on relationship quality and subsequent behavioural loyalty through the ELM perspective, the samples may not allow researchers to draw more general conclusions across different types of community contexts. The data were collected only from interest-based communities. Examining this model across different types of online communities, such as transaction-, relationship-, or fantasy-based ones, would help establish the generalisability of these results beyond the current context.

Practical implications
– The present study can help managers of online communities recognise the differential effects of these information processes across a user population and customise optimal strategies that best fit the unique characteristics of their community members. For making argument quality more convincing, Toulmin's (1958) model of argumentation could serve as an appropriate mechanism. Moreover it is crucial to provide various indicators of source credibility for information content.

Originality/value
– The paper addresses a gap in the research by using ELM to better understand the influences on the development of relationship quality and the impact on members' loyalty. Understanding these dynamics is critical since it: enriches the relationship marketing and information management literature by addressing the role of information content in the management and success of online communities; helps online community managers customise optimal strategies for their members, thereby fostering members' loyalty and their platform's competitive advantage; and illuminates two influential processes that can achieve the desired attitude change in the context of online communities.
A set of metrics to assess stakeholder engagement and social legitimacy on a corporate Facebook page
Authors: Bonsón Enrique , Ratkai Melinda 
Published: September 2013

Purpose– This study aims to propose a set of metrics in order to assess reactivity, dialogic communication and stakeholder engagement (popularity, commitment and virality): stakeholders' mood and social legitimacy on corporate Facebook pages. These metrics can offer a better understanding and measurability of this social media/social network/online communication management tool.Design/methodology/approach– Three theories (dialogic, stakeholders and legitimacy) were considered in the development of these metrics. Empirical evidence was collected from a sample of 314 European companies. Then ten active companies were used to validate the proposed metrics on Facebook.Findings– The constructed set of metrics was found to be valid and efficiently usable according to the principles of the applied theories. Moreover all the proposed metrics could be adapted for such sites as Google+.Research limitations/implications– Limitations can only be identified within the validation process as the metrics were only applied to ten representative companies from the Eurozone.Practical implications– The proposed metrics will help users, marketing/PR/communication professionals and company managers to measure their and their competitors' popularity, commitment, virality (metrics which reflect stakeholder engagement), and the mood of stakeholders, and use content analysis in order to measure social legitimacy via CSR information disclosure on Facebook. Thus the online reputation of a company can be practically measured.Originality/value– This paper is the first proposing metrics to assess stakeholder engagement and social legitimacy on a corporate Facebook page that can be used in both academic and professional circles to a gain a better understanding of corporate online communication via Facebook.
Exploring user contributed information in social computing systems: quantity versus quality
Authors: Ye Chen , Nov Oded 
Published: September 2013

Purpose– The objective of this paper is to explore empirically the relationship between quantity and quality of user contributed information in online social computing systems, and how these two performance outcomes are associated with user factors.Design/methodology/approach– Drawing from prior research, the paper presents a conceptual model hypothesizing a tradeoff between quality and quantity of user contributed information. In addition quality and quantity are associated with a set of motivational, cognitive, and social factors. The model was tested using data obtained through a web-based survey of 345 users of the Flickr online photo sharing community.Findings– The empirical results support the hypothesized inverse relationship between quantity and quality of user contributed information, moderated by user's tenure in the community. The findings also suggest that a user's quantity of contribution is positively associated with the intrinsic motivation of commitment to the community, whereas quality of contribution is positively associated with the extrinsic motivation of self-development. While users’ social embeddedness is associated with quality and quantity of contribution, virtualness of social ties is only associated with quality of contribution.Practical implications– The findings of this study can inform the design and management of online communities, and promote sustained contributions from individual users.Originality/value– This study extends our knowledge of the quality and quantity of user contributed online information by demonstrating the inverse relationship between these two performance outcomes, and that they could be motivated by different user factors.
User satisfaction with portals: testing for factorial validity and invariance across age groups
Authors: Heo Misook 
Published: September 2013

Purpose
– The goals of this study are to evaluate the factorial validity of a measurement model of cultural heritage portals and to test the model's invariance as it relates to user satisfaction.

Design/methodology/approach
– A measurement model was created by adapting multiple existing scales with the hypothesis that overall user satisfaction with a cultural heritage portal consists of satisfaction with data quality, satisfaction with service quality and users' technology acceptance. The validity of the indicator variables of each of the adapted scales was tested, then a combined measurement model was tested, via confirmatory factor analysis. The re-specified measurement model was then tested for invariance between two age groups with increasingly stringent criteria.

Findings
– The analyses indicated that the three frameworks complement each other in assessing the factors influencing user satisfaction, especially in cultural heritage portals, and that the factor structure is the same across age groups, confirming the findings of the recent online trend: some of the key internet activities such as information consumption are becoming uniformly popular across different age groups.

Originality/value
– Considering that it is not usual for non-profit organisations to assess customer satisfaction, and there exists limited literature examining factors influencing user satisfaction with cultural heritage portals, especially with different age populations, the findings of the current study provide a valuable contribution to the literature. The study also benefits practitioners in the field by providing a framework to assess user satisfaction with existing cultural heritage portals and/or to build cultural heritage portals in a way that increases users' satisfaction, regardless of age group.
Does Experience Facilitate Entry into New Export Destinations?
Authors: Wang Lili , Zhao Yong 
Published: September 2013

AbstractUsing a large panel dataset that covers 116 countries and 5013 products over the period 1998–2010, this study evaluates the effects of export experience on the geographic expansion of China's exports. The results suggest that past export experience in geographically close and culturally similar markets plays a crucial role in facilitating new market entry, and the positive spillover effects are more pronounced for incumbent and successful products. The results also indicate that spillovers from export experience are market‐specific and product‐specific, and they are limited to within the same product class and the same market, with little cross‐group effects. Finally, there is no strong evidence that export experience is more important for differentiated products than for homogeneous products, and the positive spillover effects are remarkable for both categories of products.
Population Aging and Housing Consumption: A Nonlinear Relationship in China
Authors: Li Meng , Shen Kunrong 
Published: September 2013

AbstractMass migration of rural workers to cities will inevitably increase urban housing demand. However, the scale of vacant urban housing will increase in future as a result of the population aging and the rising number of empty nesters. Therefore, demographic transition may not only increase housing demand, but also increase housing supply. Using an overlapping generations model, the present paper investigates the impact of demographic transition on housing consumption. We find that there is a nonlinear relationship between the elderly dependency ratio and housing consumption in China. With the deepening of population aging, housing consumption will increase; when the elderly dependency ratio reaches a turning point, housing consumption will decrease. The turning point of the nonlinear curve also depends on population mobility. A greater degree of population mobility will result in a delayed turning point. Furthermore, the turning point of the nonlinear curve will emerge when China's elderly dependency ratio reaches a value of 32 percent in 2025. This means that over the next decade, China should continue to increase the level of housing supply.
Emerging Geography of Creativity and Labor Productivity Effects in China
Authors: Yu Wentao , Hong Jin , Wu Yanrui , Zhao Dingtao 
Published: September 2013

AbstractThe paper presents an alternative approach to explain why regional productivity is different across regions by utilizing the creative class approach in China. First, we analyze the extent of spatial agglomeration of the creative class across regions in China. Second, we develop a model with spatial externalities to investigate how the concentration of the creative class can promote regional productivity. Our analysis confirms the importance of spatial agglomeration of the creative class in stimulating regional productivity. The results also imply that regional productivity is greater in markets with higher levels of innovation, capital stock, manufacturing and urbanization. In light of the results of our analysis, we discuss a number of policy implications.
Field‐based experimental evolution of three cereal pathogens using a mark–release–recapture strategy
Authors: Zhan J. , McDonald B. A. 
Published: September 2013

Field‐based experimental evolution is a research approach in which study species are allowed to evolve across several generations under well‐defined field conditions. Field‐based experiments in pathogen evolution became feasible with advances in molecular markers and computing technologies. Critical to success of these experiments is the choice of parental genotypes, molecular markers, experimental sites and field plot design. The current study used field‐based experimental evolution based on a mark–release–recapture strategy to analyse the dynamics of interstrain competition and host specialization in the cereal pathogens Zymoseptoria tritici, Phaeosphaeria nodorum and Rhynchosporium commune. In all three pathogen–plant interactions, compelling evidence was found indicating that increasing host heterogeneity by growing cultivar mixtures slowed down the evolution of the corresponding pathogen populations. Evidence for differential selection between parasitic and saprophytic phases of the life cycle in P. nodorum and R. commune was also found. The effect of partial resistance on the evolution of the experimental pathogen populations was mixed. A decreased rate of evolution was found in the pathogen populations sampled from partially resistant hosts in Z. tritici and P. nodorum but not R. commune. The findings indicate that field‐based experimental evolution offers a powerful approach to test hypotheses associated with the evolution of plant pathogens.
Higher torsion in the Abelianization of the full Bianchi groups
Authors: Rahm Alexander D. 
Published: September 2013

AbstractDenote by $ \mathbb{Q} ( \sqrt{- m} )$, with $m$ a square-free positive integer, an imaginary quadratic number field, and by ${ \mathcal{O} }_{- m} $ its ring of integers. The Bianchi groups are the groups ${\mathrm{SL} }_{2} ({ \mathcal{O} }_{- m} )$. In the literature, so far there have been no examples of $p$-torsion in the integral homology of the full Bianchi groups, for $p$ a prime greater than the order of elements of finite order in the Bianchi group, which is at most 6. However, extending the scope of the computations, we can observe examples of torsion in the integral homology of the quotient space, at prime numbers as high as for instance $p= 80\hspace{0.167em} 737$ at the discriminant $- 1747$.Supplementary materials are available with this article.
1-Hexanol Based Catalyst Inks for Catalyst Layer Preparation for a
DMFC
Authors: Hürter S. , Wannek C. , Müller M. , Stolten D. 
Published: September 2013

Abstract
The catalyst ink preparation for a catalyst layer production by screen printing for a direct methanol fuel cell (DMFC) is evaluated. Among a large variety of solvents 1-hexanol was chosen for the preparation due to its properties fitting the requirements for the ink preparation. 1-hexanol based catalyst inks lead to thicker catalyst layers compared to isopropyl-/propylalcohol based catalyst inks, currently used in-house. Despite showing different layer properties, MEAs based on 1-hexanol or isopropyl-/propylalcohol based catalyst layers show comparable electrochemical performances. When using 1-hexanol based catalyst inks the dispersion procedure shows great influence on the outcoming catalyst layer. Long dispersion periods and a medium power output of ultrasonication of the catalyst dispersion are beneficial and lead to good coating qualities of the catalyst layer and therefore to high electrochemical performances.
Validation of mathematical models for the prediction of organs‐at‐risk dosimetric metrics in high‐dose‐rate gynecologic interstitial brachytherapy
Authors: Damato Antonio L. , Viswanathan Akila N. , Cormack Robert A. 
Published: September 2013

Purpose:Given the complicated nature of an interstitial gynecologic brachytherapy treatment plan, the use of a quantitative tool to evaluate the quality of the achieved metrics compared to clinical practice would be advantageous. For this purpose, predictive mathematical models to predict the D2cc of rectum and bladder in interstitial gynecologic brachytherapy are discussed and validated.Methods:Previous plans were used to establish the relationship between D2cc and the overlapping volume of the organ at risk with the targeted area (C0) or a 1‐cm expansion of the target area (C1). Three mathematical models were evaluated: D2cc = α*C1 + β (LIN); D2cc = α – exp(–β*C0) (EXP); and a mixed approach (MIX), where both C0 and C1 were inputs of the model. The parameters of the models were optimized on a training set of patient data, and the predictive error of each model (predicted D2cc − real D2cc) was calculated on a validation set of patient data. The data of 20 patients were used to perform a K‐fold cross validation analysis, with K = 2, 4, 6, 8, 10, and 20.Results:MIX was associated with the smallest mean prediction error <6.4% for an 18‐patient training set; LIN had an error <8.5%; EXP had an error <8.3%. Best case scenario analysis shows that an error ≤5% can be achieved for a ten‐patient training set with MIX, an error ≤7.4% for LIN, and an error ≤6.9% for EXP. The error decreases with the increase in training set size, with the most marked decrease observed for MIX.Conclusions:The MIX model can predict the D2cc of the organs at risk with an error lower than 5% with a training set of ten patients or greater. The model can be used in the development of quality assurance tools to identify treatment plans with suboptimal sparing of the organs at risk. It can also be used to improve preplanning and in the development of real‐time intraoperative planning tools.
Identification of MMV Malaria Box Inhibitors of Plasmodium falciparum Early-Stage Gametocytes Using a Luciferase-Based High-Throughput Assay
Authors: Lucantoni Leonardo , Duffy Sandra , Adjalley Sophie H. , Fidock David A. , Avery Vicky M. 
Published: September 2013

ABSTRACT

The design of new antimalarial combinations to treat
Plasmodium falciparum
infections requires drugs that, in addition to resolving disease symptoms caused by asexual blood stage parasites, can also interrupt transmission to the mosquito vector. Gametocytes, which are essential for transmission, develop as sexual blood stage parasites in the human host over 8 to 12 days and are the most accessible developmental stage for transmission-blocking drugs. Considerable effort is currently being devoted to identifying compounds active against mature gametocytes. However, investigations on the drug sensitivity of developing gametocytes, as well as screening methods for identifying inhibitors of early gametocytogenesis, remain scarce. We have developed a luciferase-based high-throughput screening (HTS) assay using tightly synchronous stage I to III gametocytes from a recombinant
P. falciparum
line expressing green fluorescent protein (GFP)-luciferase. The assay has been used to evaluate the early-stage gametocytocidal activity of the MMV Malaria Box, a collection of 400 compounds with known antimalarial (asexual blood stage) activity. Screening this collection against early-stage (I to III) gametocytes yielded 64 gametocytocidal compounds with 50% inhibitory concentrations (IC
50
s) below 2.5 μM. This assay is reproducible and suitable for the screening of large compound libraries, with an average percent coefficient of variance (%CV) of ≤5%, an average signal-to-noise ratio (S:N) of >30, and a Z′ of ∼0.8. Our findings highlight the need for screening efforts directed specifically against early gametocytogenesis and indicate the importance of experimental verification of early-stage gametocytocidal activity in the development of new antimalarial candidates for combination therapy.
Activity of Tigecycline in Combination with Colistin, Meropenem, Rifampin, or Gentamicin against KPC-Producing Enterobacteriaceae in a Murine Thigh Infection Model
Authors: Michail George , Labrou Maria , Pitiriga Vassiliki , Manousaka Styliani , Sakellaridis Nikolaos , Tsakris Athanasios , Pournaras Spyros 
Published: September 2013

ABSTRACT

Limited antimicrobials remain active for treating severe infections due to KPC-producing pathogens, and optimal regimens have not been established. In murine thigh infections caused by nine KPC-producing clinical strains of
Enterobacteriaceae
(meropenem MICs, 1 to 4 μg/ml), we evaluated the activities of tigecycline, colistin, meropenem, rifampin, and gentamicin in single and combination regimens lasting for 24 h and 48 h. Rifampin, tigecycline, and gentamicin were the most effective monotherapies, reducing significantly the CFU counts yielded from thighs infected by 88.9 to 100%, 77.8 to 88.9%, and 66.7 to 88.9% of strains, respectively; meropenem and colistin alone exhibited considerably lower performance (significant CFU reduction in 33.3% and 22.2 to 33.3% of the strains, respectively). The addition of rifampin or gentamicin to tigecycline produced synergistic effect in most strains, while antagonism was observed in 33.3 to 44.4% of the strains when colistin was added to tigecycline and in 44.4 to 55.5% of the strains for meropenem combination with tigecycline. Tigecycline combinations with gentamicin or with rifampin caused higher CFU reductions than did tigecycline plus colistin or plus meropenem with almost all strains. Furthermore, tigecycline plus gentamicin was significantly more effective than tigecycline plus colistin or tigecycline plus meropenem in 33.3 to 44.4% and 55.5 to 66.7% of the strains, respectively, while tigecycline plus rifampin significantly outperformed tigecycline plus colistin and tigecycline plus meropenem in 33.3% and 66.7 to 77.8% of the strains, respectively. Overall, our
in vivo
study showed that tigecycline plus rifampin or plus gentamicin is a robust regimen against soft tissue infections caused by KPC-producing strains. The combinations of tigecycline with colistin or meropenem should be considered with caution in clinical practice.
Whole-Cell Screening-Based Identification of Inhibitors against the Intraphagosomal Survival of Mycobacterium tuberculosis
Authors: Khare Garima , Kumar Praveen , Tyagi Anil K. 
Published: September 2013

ABSTRACT

We describe here an efficient strategy that employs whole-cell-based screening and further short listing of the compounds by cytotoxicity- and fluorescence-based intracellular assays, resulting in potential bactericidal hits against the growth of
Mycobacterium tuberculosis
in broth culture as well as in phagosomes. These compounds also inhibited multidrug-resistant strains of
M. tuberculosis
but showed no or poor inhibition of nonpathogenic mycobacteria or other bacterial species such as
Escherichia coli
.