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1 – 10 of over 7000Naveen Revanna and Charles K.S. Moy
A study on the mechanical characteristics of cementitious mortar reinforced with basalt fibres at ambient and elevated temperatures was carried out. To investigate their effect…
Abstract
Purpose
A study on the mechanical characteristics of cementitious mortar reinforced with basalt fibres at ambient and elevated temperatures was carried out. To investigate their effect, chopped basalt fibres with varying percentages were added to the cement mortar.
Design/methodology/approach
All the specimens were heated using a muffle furnace. Flexural strength and Compressive strength tests were performed, while monitoring the moisture loss to evaluate the performance of basalt fibre reinforced cementitious mortars at elevated temperatures.
Findings
From the study, it is clear that basalt fibres can be used to reinforce mortar as the fibres remain unaffected up to 500 °C. Minimal increases in flexural strengths and compressive strengths were measured with the addition of basalt fibres at both ambient and elevated temperatures. SEM pictures revealed fibre matrix interaction/degradation at different temperatures.
Originality/value
The current study shows the potential of basalt fibre addition in mortar as a reinforcement mechanism at elevated temperatures and provides experimental quantifiable mechanical performances of different fibre percentage addition.
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Nursyamsi Nursyamsi, Johannes Tarigan, Muhammad Aswin, Badorul Hisham Abu Bakar and Harianto Hardjasaputra
Damage to reinforced concrete (RC) structural elements is inevitable. Such damage can be the result of several factors, including aggressive environmental conditions, overloading…
Abstract
Purpose
Damage to reinforced concrete (RC) structural elements is inevitable. Such damage can be the result of several factors, including aggressive environmental conditions, overloading, inadequate design, poor work execution, fire, storm, earthquakes etc. Therefore, repairing and strengthening is one way to improve damaged structures, so that they can be reutilized. In this research, the use of an ultra high-performance fibre-reinforced concrete (UHPFRC) layer is proposed as a strengthening material to rehabilitate damaged-RC beams. Different strengthening schemes pertaining to the structural performance of the retrofitted RC beams due to the flexural load were investigated.
Design/methodology/approach
A total of 13 normal RC beams were prepared. All the beams were subjected to a four-point flexural test. One beam was selected as the control beam and tested to failure, whereas the remaining beams were tested under a load of up to 50% of the ultimate load capacity of the control beam. The damaged beams were then strengthened using a UHPFRC layer with two different schemes; strip-shape and U-shape schemes, before all the beams were tested to failure.
Findings
Based on the test results, the control beam and all strengthened beams failed in the flexural mode. Compared to the control beam, the damaged-RC beams strengthened using the strip-shape scheme provided an increase in the ultimate load capacity ranging from 14.50% to 43.48% (or an increase of 1.1450 to 1.4348 times), whereas for the U-shape scheme beams ranged from 48.70% to 149.37% (or an increase of 1.4870–2.4937 times). The U-shape scheme was more effective in rehabilitating the damaged-RC beams. The UHPFRC mixtures are workable, as well easy to place and cast into the formworks. Furthermore, the damaged-RC beams strengthened using strip-shape scheme and U-shape scheme generated ductility factors of greater than 4 and 3, respectively. According to Eurocode8, these values are suitable for seismically active regions. Therefore, the strengthened damaged-RC beams under this study can quite feasibly be used in such regions.
Research limitations/implications
Observations of crack patterns were not accompanied by measurements of crack widths due to the unavailability of a microcrack meter in the laboratory. The cost of the strengthening system application were not evaluated in this study, so the users should consider wisely related to the application of this method on the constructions.
Practical implications
Rehabilitation of the damaged-RC beams exhibited an adequate structural performance, where all strengthened RC beams fail in the flexural mode, as well as having increment in the failure load capacity and ductility. So, the used strengthening system in this study can be applied for the building construction in the seismic regions.
Social implications
Aside from equipment, application of this strengthening system need also the labours.
Originality/value
The use of sand blasting on the surfaces of the damaged-RC beams, as well as the application of UHPFRC layers of different thicknesses and shapes to strengthen the damaged-RC beams, provides a novel innovation in the strengthening of damaged-RC beams, which can be applicable to either bridge or building constructions.
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Chen Wang, Xuejiao Ren, Xiaolong Jiang and Guangren Chen
The study aimed to analyze the influence of network embeddedness on the innovation performance of high-tech enterprises in Guangdong Province.
Abstract
Purpose
The study aimed to analyze the influence of network embeddedness on the innovation performance of high-tech enterprises in Guangdong Province.
Design/methodology/approach
A conceptual model of the influence of network embeddedness on the innovation performance of high-tech enterprises in Guangdong province is established, which takes the business model as the mediating variable and political association as the moderating variable. Multivariate statistical analysis and the MacKinnon confidence interval method were used to analyze 418 questionnaires.
Findings
The results show that both relational embeddedness and structural embeddedness have significant positive effects on the innovation performance of high-tech enterprises in Guangdong Province. The business model has a partial mediating effect between relationship embeddedness, structure embeddedness, and innovation performance of high-tech enterprises in Guangdong Province, respectively. Political relevance has a significant negative moderating effect on the relationship between the relationship embeddedness and innovation performance of high-tech enterprises in Guangdong Province, but the moderating effect on structural embeddedness and innovation performance of high-tech enterprises in Guangdong province has not been verified.
Research limitations/implications
The study of this paper also has some shortcomings: very few data research samples exist; the external factors affecting the performance of high-tech enterprises in Guangdong Province need to be further refined. The research scale needs further improvement.
Practical implications
In this paper, embedding theory, transaction cost theory, resource dependence theory, rent-seeking theory, new institution theory and uncertainty management theory were integrated by system attempt to reveal the mediating and moderating roles of business model and political relevance, respectively, between network embeddedness behavior and entrepreneurial innovation performance of high-tech enterprises. The research conclusions expand the relevant research in the field of entrepreneurial innovation. At the same time, the research results provide theoretical support and reference for the innovative growth of high-tech enterprises and government behavior decision-making in Guangdong province.
Originality/value
Network embeddedness will have a profound impact on the entrepreneurial innovation performance of high-tech enterprises. Existing research has overlooked discussing this issue from the perspective of internal and external influencing factors within the enterprise. Therefore, this study addresses this issue by (1) introducing the business model as the mediating variable from an internal perspective of the enterprise, (2) introducing political association as the moderating variable from an external perspective of the enterprise and (3) 418 original questionnaires of high-tech enterprises in Guangdong Province were used to test the effect of the study variables.
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Reyhan Sabri and Belgin Sakallı
Places of worship have historically been maintained using traditional building management techniques, including regular monitoring, upkeep and maintenance provided by their…
Abstract
Purpose
Places of worship have historically been maintained using traditional building management techniques, including regular monitoring, upkeep and maintenance provided by their religious communities. This paper examines the conservation issues arising after the forced displacement of the traditional custodians, which is a significant concern in conflict-ridden environments.
Design/methodology/approach
As a unique example of a long-term conflict, the divided Cyprus provides this research with illustrative cases to derive the data. The research employs content analysis of official documents, physical observations and interviews with conservation professionals.
Findings
This research demonstrates the human and environmental factors impacting the conservation of the material fabric and the use-related challenges stemming from the intangible significance of the religious legacy belonging to displaced communities. It highlights the urgency to formulate more effective mechanisms and regulatory frameworks to address vulnerability issues promptly.
Originality/value
Preservation problems on religious heritage buildings arising from the loss of traditional custodians after conflicts are an under-researched area in conservation literature. Drawing on research that was conducted several decades after the displacement of Cypriot communities, this paper reveals new insights into the magnitude of the conservation problems and the use-related complexities that need to be addressed to formulate mutually acceptable solutions for a sustainable future.
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Crystal T. Lee, Zimo Li and Yung-Cheng Shen
The proliferation of non-fungible token (NFT)-based crypto-art platforms has transformed how creators manage, own and earn money through the creation, assets and identity of their…
Abstract
Purpose
The proliferation of non-fungible token (NFT)-based crypto-art platforms has transformed how creators manage, own and earn money through the creation, assets and identity of their digital works. Despite this, no studies have examined the drivers of continuous content contribution behavior (CCCB) toward NFTs. Hence, this study draws on the theory of relational bonds to examine how various relational bonds affect feelings of psychological ownership, which, in turn, affects CCCB on metaverse platforms.
Design/methodology/approach
Using structural equation modeling and importance-performance matrix analysis, an online survey of 434 content creators from prominent NFT platforms empirically validated the research hypotheses.
Findings
Financial, structural, and social bonds positively affect psychological ownership, which in turn encourages CCCBs. The results of the importance-performance matrix analysis reveal that male content creators prioritized virtual reputation and social enhancement, whereas female content creators prioritized personalization and monetary gains.
Originality/value
We examine Web 3.0 and the NFT creators’ network that characterizes the governance practices of the metaverse. Consequently, the findings facilitate a better understanding of creator economy and meta-verse commerce.
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Shulin Xu, Xue Wan, Yunfeng Li and Jingrui Yan
How to realize social capital “exit from virtual to real” has become not only a hot issue that elicited economists' and the practice field's concern but also a key economic…
Abstract
Purpose
How to realize social capital “exit from virtual to real” has become not only a hot issue that elicited economists' and the practice field's concern but also a key economic structure problem that the government has to solve urgently. The main purpose of this study is to explore effective methods for social capital to “exit from virtual to real”.
Design/methodology/approach
The study investigates the realization path of social capital's “exit from virtual to real” by using firm theory and data from the National Bureau of Statistics in China. Provincial panel data are also utilized to empirically test the impact of social capital's de-realization to virtual (or from virtual to real) on economic development and whether the path of social capital “from virtual to real” is valid.
Findings
This study analyzes the development status of social funds serving the real economy and the hazards of social funds' “exit from real to virtual,” which are mainly viewed as eroding the development of the real economy and causing operating difficulties. On the basis of firm theory, the internal motivation for why social funds flow to the real economy is explored from the perspectives of the needs of the real economy, price and profit. Moreover, this study designs a path for returning social capital to the real economy.
Practical implications
Overall, expanding aggregate demand while providing an effective supply and implementing a proactive fiscal policy that focuses on structural tax cuts while keeping margins in the virtual economy are appropriate for promoting the competitiveness of the real economy.
Originality/value
This study explores a topic, namely, social capital “exit from virtual to real,” that has received little attention. It provides an in-depth discussion of the following questions. (1) What is the current situation of social capital serving the real economy? (2) What kind of harm can social capital bring to society? What are the inherent barriers to the flow of social capital to the real economy? (3) At this stage, how can the effective transformation of social capital into the real economy be realized? The findings help in understanding the sustainable entrepreneurship concept, particularly in developing countries.
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Bas Reus, Christine Moser and Peter Groenewegen
The purpose of this study is to show that an important antecedent of perceived knowledge quality is an employee’s position in the organizational network due to their participation…
Abstract
Purpose
The purpose of this study is to show that an important antecedent of perceived knowledge quality is an employee’s position in the organizational network due to their participation in different interest groups. In particular, this study theorizes that brokers establish a network of groups, which increases perceived knowledge quality vis-a-vis the social capital that employees draw on.
Design/methodology/approach
To test this study’s hypotheses on the influence of the structural position of knowledge brokers on the positive effects of social capital on perceived knowledge quality, this study combines data from an online survey with longitudinal archival data from a youth-care organization who used an enterprise social network (ESN) for knowledge sharing.
Findings
This study found a mitigating effect of being a broker on the relationship between trust and perceived knowledge quality, and also between inter-team interaction and perceived knowledge quality for lower levels of both trust and inter-team interaction on perceived knowledge quality.
Research limitations/implications
Although the hypotheses are supported, in light of prior research, the authors would have expected stronger and positive effects.
Practical implications
This research is particularly interesting because it emphasizes the important role of social capital. For organizations that deal with trust issues, it might help to stimulate employees to broaden their activity on ESNs by becoming active in multiple groups.
Originality/value
While knowledge sharing on ESNs is generally conducive for creating organizational value, there is a lack of understanding of what drives employees’ perception of the quality of shared knowledge, and how this perception may depend on their position in the social network. To investigate this question, the authors turn to social capital theory.
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Vartika Sharma, Nikki Singh, Annie Chiang, Janine Paynter and Rachel Simon-Kumar
With global migration, the number of ethnic minority and migrant women receiving maternity health care in dominantly Anglo-European societies has increased significantly but they…
Abstract
Purpose
With global migration, the number of ethnic minority and migrant women receiving maternity health care in dominantly Anglo-European societies has increased significantly but they consistently have among the worst pregnancy and maternal outcomes. This paper aims to analyse gaps in structural (migration-related inequalities) and cultural (responsiveness to ethno-cultural practices) competencies among maternal health practitioners in Aotearoa New Zealand (NZ).
Design/methodology/approach
Using a semi-structured interview guide, in-depth interviews were conducted with 13 maternal health practitioners in NZ. Data were analysed using a thematic analysis framework.
Findings
The results highlight significant barriers around language and communication, cultural stereotyping by professionals, ethnic women’s own constraints around family and cultural expectations and their lack of knowledge about reproductive health. In addition, practitioners’ own ethnic differences are inseparable from their approach to structural and cultural competencies; there were instances of ‘over-’ or ‘under-’ reading of culture, practitioner constructions of ideal pregnancies and anti-racism concerns that shaped maternal care practices that were sensitive to, but also marginalised, ethnic migrant women who attended maternity services.
Originality/value
To the best of the authors’ knowledge, this is the only study in NZ that examines the impact of complex dynamics of migration and culture on knowledge, beliefs and values of practitioners, in context of their own personal biographies. Identifying strategies to improve the way diversity is practiced in hospital settings can be transformational in improving maternal outcomes for ethnic migrant women in NZ.
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Harold Delfín Angulo Bustinza, Bruno de Souza and Roberto De la Cruz Rojas
Maddy Power, Katie J. Pybus, Kate E. Pickett and Bob Doherty
Background: Evidence suggests that people living in poverty often experience inadequate nutrition with short and long-term health consequences. Whilst the diets of low-income…
Abstract
Background: Evidence suggests that people living in poverty often experience inadequate nutrition with short and long-term health consequences. Whilst the diets of low-income households have been subject to scrutiny, there is limited evidence in the UK on the diet quality and food practices of households reporting food insecurity and food bank use. We explore lived experiences of food insecurity and underlying drivers of diet quality among low-income families, drawing upon two years of participatory research with families of primary school age children.
Methods: We report on a mixed-methods study of the relationship between low income, food bank use, food practices and consumption from a survey of 612 participants, including 136 free text responses and four focus groups with 22 participants. The research followed a parallel mixed-methods design: qualitative and quantitative data were collected separately, although both were informed by participatory work. Quantitative data were analysed using binary and multinomial logistic regression modelling; qualitative data were analysed thematically.
Results: Lower income households and those living with food insecurity struggle to afford a level of fruit and vegetable consumption that approaches public health guidance for maintaining a healthy diet, despite high awareness of the constituents of a healthy diet. Participants used multiple strategies to ensure as much fruit, vegetable and protein consumption as possible within financial constraints. The quantitative data suggested a relationship between higher processed food consumption and having used a food bank, independent of income and food security status.
Conclusions: The findings suggest that individualised, behavioural accounts of food practices on a low-income misrepresent the reality for people living with poverty. Behavioural or educational interventions are therefore likely to be less effective in tackling food insecurity and poor nutrition among people on a low income; policies focusing on structural drivers, including poverty and geographical access to food, are needed.
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