Search results

Concrete gravity dams are important structures for flood control and hydraulic power generation, but they can be vulnerable to seismic activity due to ground movements that trigger crack propagation.

To better understand the factors that affect the stability of concrete gravity dams against concrete fracture during earthquakes, a concrete plastic damage model has been utilized with two new expressions to simulate compressive and tensile damage variables.

The findings showed that the crack patterns were strongly influenced by the concrete’s strength. The simulation results led to the proposal of appropriate concrete properties aimed at minimizing damage. These findings, together with the proposed model, offer significant insights that can enhance the safety and stability of concrete gravity dam structures.

This study offers a comprehensive analysis of concrete behavior under varying grades and introduces simple and robust expressions for evaluating concrete parameters in plastic damage models. The versatility of these expressions enables accurate simulation of stress-strain curves for different grades, resulting in excellent agreement between model results and experimental findings. The simulation of the Koyna Dam case study demonstrates a similarity in crack patterns with previous simulations and field observations.

The purpose of this review paper is to provide a review of the most recent advances in the field of manufacturing composite sandwich panels along with their advantages and limitations. The other purpose of this paper is to familiarize the researchers with the available developments in manufacturing sandwich structures.

The most recent research articles in the field of manufacturing various composite sandwich structures were reviewed. The review process started by categorizing the available sandwich manufacturing techniques into nine main categories according to the method of production and the equipment used. The review is followed by outlining some automatic production concepts toward composite sandwich automated manufacturing. A brief summary of the sandwich manufacturing techniques is given at the end of this article, with recommendations for future work.

It has been found that several composite sandwich manufacturing techniques were proposed in the literature. The diversity of the manufacturing techniques arises from the variety of the materials as well as the configurations of the final product. Additive manufacturing techniques represent the most recent trend in composite sandwich manufacturing.

This work is valuable for all researchers in the field of composite sandwich structures to keep up with the most recent advancements in this field. Furthermore, this review paper can be considered as a guideline for researchers who are intended to perform further research on composite sandwich structures.

Within minutes, our group, who had no prior introduction, began to learn the value of emerging from a relational space of (re)presenting and (re)storying our experiences. “I” became “We”, which became “Us”

Recently, the seventh bi-annual conference of the World Federation for Teacher Education 2023 focused on the theme of “Re-imagining Teacher Education: From Words to Action.” During the session on métissage as methodology, participants from four different countries, three ethnic backgrounds and gender and sexual differences were invited into dialogue to explore the nuances of our identities, academic positions and life experiences.

Doing métissage as novices, our subsequent discussion problematized the perpetuation of procedural narratives that contested the Cartesian cuts of methodological normalcy.

Sharing our stories of self in our group we referenced how institutional frameworks had shaped and were reconstructing contexts for our being and belonging in the academy. In our narrating vulnerability we were once again located in telling relations to do with identity, power and social being. Jones (2015, p. 8) has asked. “Other than dry academic reports, how can we retell these stories in sensitive and ethical ways to wider audiences? How do the stories themselves inspire creativity in retelling them? How can we involve participants in the retelling of their stories?”

This study aims to understand why some social and environmental reporting (SER) regulations are more successful than others in modifying collective corporate reporting behaviour and expectations. More specifically, it presents a qualitative and historically informed exploration of the construction of the enabling conditions for corporate adoption of SER regulation in a national context.

Drawing on insights from structuration theory and the sociological approach to legal studies, the authors examined the normative persuasion of the first regulation in Spain requiring firms to disclose social and environmental information in a stand-alone report: Article 39 of the Spanish Sustainable Economy Law. The case study is based primarily on 38 semi-structured interviews with relevant actors involved in this SER regulation from 2008 to 2014. Other sources such as legal and policy documents, historical documents, books, press reports and field notes from attendance at technical meetings related to the phenomenon under study help inform and complement the analysis of the interviews.

The analysis reveals that the agency of regulators, regulatees and other relevant actors involved in the SER regulation led to the law becoming a dead letter. However, only by examining the structural circumstances, shaped by history and socio-economic context, can the authors understand how the normative persuasion of law is constructed or undermined.

The study underscores the importance of the national context in developing corporate social responsibility (CSR) regulation and the crucial role of history. The results of this research also suggest that significant progress towards a more transformative CSR regulation cannot be achieved without the support of enabling structures/

Recent SER regulations (European Corporate Sustainability Reporting Directive and IFRS sustainability standards, to mention those that are gaining most traction) may not achieve sufficient compliance if those responsible for drafting them do not ensure that the conditions for the emergence of regulatory persuasion are met. Regulators must therefore have a profound understanding of how these conditions are constructed as part of a historical process inextricably linked to the social structures of the environment in which the law is to be applied.

The study reveals the changing landscape of corporate social responsibility, where scientists, academics, NGO activists and civil society organisations struggle to gain some agency in a field populated by actors, such as trade unions or employers, who were constitutive of Western industrial liberal democracies.

This study presents an in-depth and historically grounded analysis of the dynamics involved in creating the conditions that lead to successful SER legislation in a national context.

This study empirically examines the moderating role of geopolitical risk on the tourism–economic growth nexus by applying a recent geopolitical risk indicator developed by Caldara and Iacoviello (2022) in a cross-country panel data growth model context for a sample of 24 countries.

A Dummy Variable Least Squares panel data model, nonparametric covariance matrix estimator and SYS-GMM estimation techniques are employed for the analysis. The authors capture the GPR moderating effect by disaggregating the cross-country sample according to low versus high country GPR score and through a GPR interaction coefficient. Several controls are included in the models such as gross fixed capital formation and—consistent with Barro (1990)—government consumption. Trade openness is used to account for the export-led growth effect. In line with neoclassical growth theory (e.g. Barro, 1991), the authors also include the real interest rate, to account for policy makers' commitment to macroeconomic stability, financial depth, as a proxy for financial development, population growth and the level of secondary school education. The authors also control for unobserved country-specific and time-invariant effects.

The research finds that the interaction term of geopolitical risk significantly contributes to the predictive ability of the regression and provides empirical evidence that confirms that only in low geopolitical risk countries international tourism positively and significantly contributes to economic growth. Important theoretical and policy implications flow from these findings.

The study not only contributes to advancing academic knowledge on the tourism–growth nexus, it also has impact beyond academia. Many countries have in the past pursued and many continue to pursue, tourism specialization and/or tourism-led growth strategies based on the theoretically well-established and empirically validated positive link between inbound tourism and economic growth. The findings alert policy makers in such countries to the significant moderating role that geopolitical risk plays in affecting the above-mentioned relationship and to the importance of prioritizing geopolitical stability as a policy precursor for the successful implementation of such strategies.

This paper aims to unravel the puzzle that the United Kingdom’s high-quality government accounting and fiscal architecture is associated with low-quality outcomes, including poor productivity growth, high public debt, public services which do not meet citizen expectations and historically high levels of taxation. It contributes to public sector accounting research in the fields of fiscal transparency and governance.

This paper uses Miller and Power’s (2013) economization framework and Dunsire’s (1990) concept of collibration to explain why being a global leader in public sector accounting reform and in fiscal and monetary architecture has not protected the UK from weak governance. The intersection of economization’s roles of accounting with modes of government accounting clarifies the puzzle.

Whereas accruals government accounting contributes to fiscal transparency, this is not a sufficient condition for well-judged policy and its effective application. Collibration is the dominant mechanism for mediation in the fiscally centralized UK, but it has failed to deliver stable outcomes, in part because Parliament is limited in its ability to hold back inappropriate behaviour by the Executive. Subjectivization has disrupted adjudication because governments at all levels resist constraints on their behaviour, with unpredictable and often damaging consequences.

This paper provides insights through the combined lens of economization and modes of government accounting, demonstrating the practical value of this conceptualization. Although some causes for unsatisfactory outcomes are specific to the UK, there are cautions for accounting and fiscal reformers in other countries, such as Member States of the European Union.

This papers aims to study lattice structures in terms of geometric variables, manufacturing variables and material-based variants and their correlation with compressive behaviour for their application in a methodology for the design and development of personalized elastic therapeutic products.

Lattice samples were designed and manufactured using extrusion-based additive manufacturing technologies. Mechanical tests were carried out on lattice samples for elasticity characterization purposes. The relationships between sample stiffness and key geometric and manufacturing variables were subsequently used in the case study on the design of a pressure cushion model for validation purposes. Differentiated areas were established according to patient’s pressure map to subsequently make a correlation between the patient’s pressure needs and lattice samples stiffness.

A substantial and wide variation in lattice compressive behaviour was found depending on the key study variables. The proposed methodology made it possible to efficiently identify and adjust the pressure of the different areas of the product to adapt them to the elastic needs of the patient. In this sense, the characterization lattice samples turned out to provide an effective and flexible response to the pressure requirements.

This study provides a generalized foundation of lattice structural design and adjustable stiffness in application of pressure cushions, which can be equally applied to other designs with similar purposes. The relevance and contribution of this work lie in the proposed methodology for the design of personalized therapeutic products based on the use of individual lattice structures that function as independent customizable cells.