Properties of self-compacting mortar made with various mineralogical sources different types of sands and fillers

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Brahim Nécira ◽  
Yacine Abadou
Keyword(s):  
Design Methodology ◽  
The Self ◽  
River Sand ◽  
Content Type ◽  
Different Types ◽  
Negative Effect ◽  
Great Availability ◽  
Mechanical Strengths ◽  
Positive Effect ◽  
Saturation Dose

Purpose By its high fluidity, great deformability and rheological stability, the self-compacting mortar (SCM) is capable of ensuring the ability to be easily implemented without vibration. However, its formulation requires a large volume of fine materials with a high dosage of cement, which is necessary to ensure adequate workability and mechanical strengths, which is necessary to allow its flow. Current environmental considerations encourage reducing the production of cement, it is essential to use additions to replace the cement, because of their great availability and their moderate price. On another side, their use contributes to an economic sort to solve the problems related to the environment. Design/methodology/approach The formulations and characteristics of SCM made with two types of mineralogical sources (silica and limestone) were investigated. Different materials were used separately and in binary combinations; silica river sand (SRS), limestone quarry sand (LQS), silica fillers (SF) and limestone fillers (LF). The formulation starts with the self-compacting pastes (SCPs) then the SCMs at the SRS and the LQS whose the cement is partially replaced by volume contents of SF and LF with 15%, 30% and 45%. Findings The results obtained prove that the incorporation of LQS instead of SRS has a negative effect on the fluidity and deformability and a positive effect on the mechanical strengths of SCM. In addition, the incorporation of the SF and LF reduces the need for water and the saturation dose of superplasticizer in the pastes. Thus, the addition of the SF and LF in specific voluminal contents (15% SF and 30% LF) in the binder can have a beneficial effect on the parameters of the workability and the mechanical strengths of SCM. These results are very interesting to aspects such as technological, economic and environmental. Originality/value Influence of the different type of sands and fillers in improvements the properties of SCM made from various mineralogical sources.

Firm exporting and investment in exploratory and exploitative R&D

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yi Ke ◽  
Marios Kafouros ◽  
Haifeng Yan
Keyword(s):  
Organizational Learning ◽  
Design Methodology ◽  
Generalized Least Squares ◽  
Learning Opportunities ◽  
Significant Positive Effect ◽  
Content Type ◽  
Different Types ◽  
D Investment ◽  
Positive Effect ◽  
Practical Implications

Purpose This study aims to investigate how firms’ internationalization activities through exporting influence their organizational learning. Specifically, this study examines how the level of exporting and geographic market scope impact a firm’s exploratory and exploitative R&D investment differently. Design/methodology/approach Using a sample of 7,055 firms in Spain during the period 2006–2011, the study uses regression analysis (generalized least squares random effects) to test various hypotheses. Findings Although exporting improves organizational learning, learning opportunities vary for different aspects of exporting. Specifically, the level of a firm’s exporting has a significant positive effect on its exploitative R&D investment, whereas geographic market scope of a firm increases its exploratory R&D investment. Practical implications The findings can aid in shaping policies and firms’ decisions pertaining to exporting and exploratory and exploitative R&D investment. As the findings indicate that, the determinants of exploratory and exploitative R&D investment are different, managers and policymakers, who aim at a specific type of R&D investment, should understand which exporting strategy they should pursue. Originality/value Prior research suggests that exporting improves organizational learning. This study extends this knowledge by showing that different aspects of exporting, specifically, the level of exporting and geographic market scope, drive different types of organizational learning.

Effect of religiosity on the decision to participate in a boycott

2017 ◽  
Vol 8 (2) ◽  
pp. 309-328 ◽  
Author(s):  
Fawzi Dekhil ◽  
Hajer Jridi ◽  
Hana Farhat
Keyword(s):  
Brand Loyalty ◽  
Design Methodology ◽  
Present Model ◽  
Moderating Effect ◽  
Content Type ◽  
Data Analyses ◽  
Negative Effect ◽  
Israeli Army ◽  
Positive Effect ◽  
Practical Implications

Purpose This research aims to analyze the effects of religiosity on the decision to participate in a boycott and the effect of a boycott on attitudes toward the boycotted brand. It also aims to measure the moderating effect of brand loyalty on the different models the authors discuss. Design/methodology/approach An experiment involving 165 Tunisian individuals during a call for a boycott of products of the Coca-Cola Company, which supports the Israeli army against Palestine, was conducted. Data analyses were conducted via two principal stages using SPSS 20.0 and Smart PLS 2.0. Findings The findings show that degree of religiosity was one of the antecedents of decision to participate in a boycott, and this decision has a negative effect on the attitude toward the brand being boycotted. The paper also has been able to show that brand loyalty moderates the relation of the present model. It diminishes the effect of religiosity on boycotting. Research limitations/implications Among the limits of the study is the fact that the authors relied on the investigation of only one product/brand (namely, Coca-Cola). In addition, the samples subjected to inquiry by the authors were chosen for their convenience. Practical implications Besides, the presentation of boycotted products in stores has a negative effect on the sales of the surrounding “non-boycotted” products (Friedman, 1999a). The authors note here that marketers can derive huge benefits from the exploration of boycott, for many reasons. The company must insist on the satisfaction and trust of their consumers, which are the bases of the loyalty. They must define the marketing strategy to increase the loyalty. This will diminish the effect of religiosity on the decision to participate in the boycott. Social implications The results allow us to assert that the decision to participate in a boycott has a negative effect on the attitude of the consumer and on the brand to be boycotted. Investigating the moderating effect of loyalty on the relation between religiosity and the decision to participate in a boycott is very interesting. Originality/value This research has shown that religiosity has a positive effect on boycotting. Also, it was found that a boycott has a negative effect on attitudes toward the boycotted brand. Therefore, brand loyalty moderates negatively the effect of religiosity on the decision to participate in the boycott and moderates the effect of the boycott on brand attitude.

The parameters affecting seam quality: a comprehensive review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Esra Zeynep Yıldız ◽  
Oktay Pamuk
Keyword(s):  
Design Methodology ◽  
Production Performance ◽  
High Quality ◽  
Actual Performance ◽  
Content Type ◽  
Sewing Thread ◽  
Negative Effect ◽  
End Use ◽  
Positive Effect ◽  
Selection Of

Purpose The conversion of fabric into a garment involves many interactions such as the selection of suitable sewing thread, optimization of sewing parameters, ease of conversion of fabric into the garment and actual performance of the sewn fabric during wear of the garment. The adjustment of all sewing parameters is necessary to ensure quality. The purpose of this paper is to define the parameters that affect seam quality comprehensively. Design/methodology/approach This study primarily focuses on the studies dealing with the effect of various parameters on-seam quality in detail. A systematic literature review was conducted. Findings The interactions between parameters may lead to different results than the effect of a single parameter. In addition, changing some parameters may have a positive effect on one element of seam quality while having a negative effect on another. For this reason, it is very important to properly select the parameters according to the specific end use of the garment products and also to consider the interactions. Originality/value The knowledge of various factors that affect seam quality will be helpful for manufacturers to improve production performance and to be able to produce high-quality seam.

Psychological drivers of referral reward program effectiveness

2018 ◽  
Vol 32 (3) ◽  
pp. 256-268 ◽  
Author(s):  
Chiara Orsingher ◽  
Jochen Wirtz
Keyword(s):  
Design Methodology ◽  
Program Effectiveness ◽  
Weak Ties ◽  
Content Type ◽  
Model Studies ◽  
Psychological Mechanisms ◽  
Negative Effect ◽  
Reward Program ◽  
Positive Effect ◽  
Practical Implications

Purpose Empirical research presents conflicting findings with regards to the effectiveness of referral reward programs (RRPs) and supports two alternative and conflicting views on the effectiveness of incentivizing recommendations. They are, first, a positive effect via perceived attractiveness of the incentive, and second, a negative effect via metaperception of the recommendation. The purpose of this paper is to examine these two opposing psychological mechanisms to reconcile the conflicting findings. Design/methodology/approach The authors conducted three experiments. Study 1 tests the base model. Studies 2 and 3 add moderators to test whether each mediating variable operates exclusively on its intended relationship. Findings Incentive size enhanced the attractiveness of an incentive, but reduced the metaperception favorability of the recommendation. These two opposing mechanisms operated in parallel, independently and fully mediated the effects of incentive size to likelihood of making a recommendation. Thus, the net impact of incentives on recommendation behavior depended on the relative strengths of these two opposing forces. Practical implications The study recommends managers to design RRPs with incentives that recommenders perceive as highly useful (i.e. to increase attractiveness) but have a low face value (i.e. to reduce metaperception concerns) and to target RRPs to strong rather than weak ties. Originality/value Our work offers an integrated theoretical account of consumers’ responses to incentivized recommendations and provides managerially relevant guidelines for the design of effective RRPs.

Self-employment and job satisfaction: an empirical analysis

2014 ◽  
Vol 35 (5) ◽  
pp. 688-702 ◽  
Author(s):  
Gema Álvarez ◽  
Ana I. Sinde-Cantorna
Keyword(s):  
Job Satisfaction ◽  
Personality Traits ◽  
Empirical Analysis ◽  
Design Methodology ◽  
Explanatory Variable ◽  
The Self ◽  
Content Type ◽  
Self Employment ◽  
Effect Model ◽  
Positive Effect

Purpose – The purpose of this paper is to test whether the usual positive effect of self-employment on job satisfaction remains once the greater autonomy and flexibility afforded by self-employment have been factored in, as well as the existence of differences in unobserved characteristics across individuals. Design/methodology/approach – It may be thought that the probability of being self-employed and the declared job satisfaction are not independent from each other due to differences in unobserved characteristics – as psychological or personality traits – across individuals. Therefore, self-employment should be treated as an endogenous variable when it is introduced as an explanatory variable in a job satisfaction equation. Given this, the paper proposes the estimation of a treatment effect model in which self-employment and job satisfaction equations are estimated jointly. Findings – The results suggest that the usual positive effect of self-employment on job satisfaction is due to the greater work autonomy afforded by self-employment, and not to the greater willingness of the self-employed to report higher levels of satisfaction. Thus, the paper finds that once flexibility and autonomy are considered, the usual positive effect of self-employment on job satisfaction disappears and becomes negative. Research limitations/implications – It would be useful further empirical analysis using other data, especially panel data, to test the robustness of the results. Originality/value – The paper proposes an alternative way to analyse the relation between self-employment and job satisfaction by taking into account both the greater autonomy and flexibility afforded by self-employment, as well as psychological or personality traits.

scholarly journals Getting buy-in: financial stakeholders’ commitment to strategic transformation

2017 ◽  
Vol 15 (2) ◽  
pp. 227-243 ◽  
Author(s):  
Mark R. Mallon
Keyword(s):  
Design Methodology ◽  
Moral Legitimacy ◽  
Content Type ◽  
Stakeholder Support ◽  
Resource Commitment ◽  
External Stakeholders ◽  
Negative Effect ◽  
Strategic Transformation ◽  
Positive Effect

Purpose Strategic transformations are likely necessary for all organizations at some point in their existence, but the role of external stakeholders in committing resources to support transformations has been largely overlooked. This paper aims to begin to fill this gap by developing a theoretical model detailing which factors increase the likelihood that financial stakeholders will commit resources to strategic transformation. Design/methodology/approach Neo-institutional and stakeholder theories are applied to the strategic transformation phenomenon to develop six propositions regarding financial stakeholders’ resource commitment to strategic transformation. Findings Moral legitimacy, pragmatic legitimacy and unfamiliarity with the firm directly affect the likelihood that financial stakeholders will commit resources to strategic transformation. Cognitive legitimacy or familiarity amplifies the positive effect of pragmatic legitimacy on resource commitment, and pragmatic legitimacy lessens the negative effect of unfamiliarity with the firm on resource commitment. Originality value This paper lays out a clear conceptual model of the antecedents of financial stakeholders’ resource commitment to strategic transformation, aiding practitioners in securing critical stakeholder support and filling an important gap in strategic transformation/stakeholder literature.

scholarly journals Inflation, inflation uncertainty and output growth: what does the data say for Malaysia?

2014 ◽  
Vol 41 (3) ◽  
pp. 370-386 ◽  
Author(s):  
Ahmad Zubaidi Baharumshah ◽  
Siew-Voon Soon
Keyword(s):  
Design Methodology ◽  
Structural Breaks ◽  
Output Growth ◽  
Economic Uncertainty ◽  
Macroeconomic Performance ◽  
Inflation Uncertainty ◽  
Content Type ◽  
Output Uncertainty ◽  
Negative Effect ◽  
Positive Effect

Purpose – The purpose of this paper is to examine the causal relationships between inflation, output growth and their uncertainties in Malaysia. Design/methodology/approach – The modeling approach allows for structural breaks to avoid the masking of specific impacts. Findings – Based on the asymmetric Generalized Autoregressive Conditional Heteroskedasticity model, the paper found strong evidence favoring a positive effect of a change in the inflation uncertainty as predicted by the Friedman-Ball hypothesis. In addition, inflation (inflation uncertainty) has direct (indirect) negative effect on the output growth. The results are consistent with the Taylor effect – increases in inflation uncertainty decreases output uncertainty. The analysis also reveals that economic uncertainty lowers the growth rate of output, complying with Bernanke's idea. Originality/value – The present study suggests that extra efforts are required to locate the breaks in the variance in order to draw concrete evidence on link between economic uncertainty and macroeconomic performance.

scholarly journals Advantages and potential challenges of data management in e-maintenance

2019 ◽  
Vol 25 (3) ◽  
pp. 378-396 ◽  
Author(s):  
Arian Razmi-Farooji ◽  
Hanna Kropsu-Vehkaperä ◽  
Janne Härkönen ◽  
Harri Haapasalo
Keyword(s):  
Data Management ◽  
Design Methodology ◽  
Management Practices ◽  
Future Research ◽  
Conceptual Approach ◽  
Content Type ◽  
Different Types ◽  
Maintenance Systems ◽  
Industry Leader ◽  
Practical Implications

Purpose The purpose of this paper is twofold: first, to understand data management challenges in e-maintenance systems from a holistically viewpoint through summarizing the earlier scattered research in the field, and second, to present a conceptual approach for addressing these challenges in practice. Design/methodology/approach The study is realized as a combination of a literature review and by the means of analyzing the practices on an industry leader in manufacturing and maintenance services. Findings This research provides a general understanding over data management challenges in e-maintenance and summarizes their associated proposed solutions. In addition, this paper lists and exemplifies different types and sources of data which can be collected in e-maintenance, across different organizational levels. Analyzing the data management practices of an e-maintenance industry leader provides a conceptual approach to address identified challenges in practice. Research limitations/implications Since this paper is based on studying the practices of a single company, it might be limited to generalize the results. Future research topics can focus on each of mentioned data management challenges and also validate the applicability of presented model in other companies and industries. Practical implications Understanding the e-maintenance-related challenges helps maintenance managers and other involved stakeholders in e-maintenance systems to better solve the challenges. Originality/value The so-far literature on e-maintenance has been studied with narrow focus to data and data management in e-maintenance appears as one of the less studied topics in the literature. This research paper contributes to e-maintenance by highlighting the deficiencies of the discussion surrounding the perspectives of data management in e-maintenance by studying all common data management challenges and listing different types of data which need to be acquired in e-maintenance systems.

Exploring the boundaries of rhetoric

2014 ◽  
Vol 27 (5) ◽  
pp. 793-806 ◽  
Author(s):  
Eduard Bonet
Keyword(s):  
Social Sciences ◽  
Conceptual Framework ◽  
Design Methodology ◽  
The Self ◽  
History Of Rhetoric ◽  
Content Type ◽  
History Of ◽  
Practical Development ◽  
The Subject

Purpose – The purpose of this paper is to examine how the boundaries of rhetoric have excluded important theoretical and practical subjects and how these subjects are recuperated and extended since the twentieth century. Its purpose is to foster the awareness on emerging new trends of rhetoric. Design/methodology/approach – The methodology is based on an interpretation of the history of rhetoric and on the construction of a conceptual framework of the rhetoric of judgment, which is introduced in this paper. Findings – On the subject of the extension of rhetoric from public speeches to any kinds of persuasive situations, the paper emphasizes some stimulating relationships between the theory of communication and rhetoric. On the exclusion and recuperation of the subject of rhetorical arguments, it presents the changing relationships between rhetoric and dialectics and emphasizes the role of rhetoric in scientific research. On the introduction of rhetoric of judgment and meanings it creates a conceptual framework based on a re-examination of the concept of judgment and the phenomenological foundations of the interpretative methods of social sciences by Alfred Schutz, relating them to symbolic interactionism and theories of the self. Originality/value – The study on the changing boundaries of rhetoric and the introduction of the rhetoric of judgment offers a new view on the present theoretical and practical development of rhetoric, which opens new subjects of research and new fields of applications.

Nanocomposite Photocatalyst Based on Layered Double Hydroxides (LDHs) Associated with TiO2

2014 ◽  
Vol 92 ◽  
pp. 100-109 ◽  
Author(s):  
Jonjaua Ranogajec ◽  
Andrijana Sever-Skapin ◽  
Ognjen Rudic ◽  
Snezana Vucetic
Keyword(s):  
Photocatalytic Activity ◽  
Layered Double Hydroxides ◽  
Direct Contact ◽  
Building Materials ◽  
Specific Problem ◽  
The Self ◽  
Different Types ◽  
Double Hydroxides ◽  
Positive Effect ◽  
Material Porosity

The surfaces of building materials are constantly exposed to the actions of environmental factors, pollutants of inorganic and organic origin as well as to microorganisms, which significantly contribute to corrosion phenomena.The application of coatings decreases the negative action of the pollutants minimizing their direct contact with the substrate. Different types of coatings with additional functions have been developed. A specific problem of these applications is the lack of compatibility of the photocatalysts with the surface of the building materials and the detachment of potentially toxic TiO2nanoparticles. In the present study, this problem was solved by the proper immobilization of TiO2nanoparticles onto the photocatalyst support, layered double hydroxides (LDHs). The newly formed coating possesses acceptable porosity for a porous building material (porosity within the range of 30-46 %) and satisfied photocatalytic activity, as well as mineralogical compatibility with the substrates (mortars, renders, bricks). Additionally, a positive effect considering the self-cleaning phenomenon was attained.

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