Improvement on modal curvatures methods for multiple damage identification in beams

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Daniele Cinque ◽  
Jose Viriato Araujo dos Santos ◽  
Stefano Gabriele ◽  
Sonia Marfia ◽  
Hernâni Lopes
Keyword(s):  
Finite Difference ◽  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Damage Identification ◽  
Substantial Improvement ◽  
Content Type ◽  
Damage Scenarios ◽  
Difference Formula ◽  
Modal Curvature ◽  
Experimental Stage

PurposeThe purpose of this paper is to present a study on the application of four damage factors to several single and multiple damage scenarios of aluminium beams. Each one of these damage factors is defined by the information given by modal curvatures of the beams.Design/methodology/approachThe methodology consisted of a first experimental stage in which the modal rotations were measured with shearography and a subsequent numerical analysis in order to obtain the modal curvatures. To this end, three finite difference formulae were applied. The modal curvatures were then used to calculate the damage factors.FindingsIt was found that the profile of the damage factors varies according to the finite difference formula used. In view of the findings, the differences among the damage factors analysed are highlighted and some final recommendations to improve damage identifications via modal curvature-based are presented.Originality/valueTo the best of the authors’ knowledge, the application and comparison of several finite difference formulae and corresponding optimal sampling has not been carried out before. With the proposed approach, it is possible to identify multiple damages, which is still a great challenge. The post-processing of shearography measurements with a numerical method, which is inherently a multidisciplinary approach, is also a substantial improvement upon other type of approaches found in the literature.

Emerging social and business trends associated with the Covid-19 pandemic

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hamid Yeganeh
Keyword(s):  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Synthesis Method ◽  
Comprehensive Investigation ◽  
Content Type ◽  
New Era ◽  
The Past ◽  
New Type ◽  
High Connectivity ◽  
Work And Organizations

Purpose This paper aims to identify, classify and study emerging social and business trends associated with the outbreak of the Covid-19 pandemic. Design/methodology/approach By adopting the meta-synthesis method, the study scrutinizes, synthesizes and interprets the findings from a pool of publications. This approach results in identifying 53 key ideas that are classified under nine dominant trends. Findings The study identifies and examines nine major trends caused and intensified by the Covid-19 pandemic, i.e. the rise of authoritarianism, the new era of corporate welfare, deep imbalances in public finances, exacerbated inequalities, higher risks of poverty and famine, the dominance of giant corporations, the increasing influence of big tech, the accelerated innovation and the fluidity of work and organizations. The paper suggests that these trends are the continuation of the past three decades’ transformations, are contributing to the rising concentration of power and wealth and are leading to a new type of globalization marked by high connectivity and low tangibility. Originality/value The originality of this paper resides in adopting a multidisciplinary approach to analyzing various social and business dimensions of a complex phenomenon. While the study should not be viewed as a comprehensive investigation, it offers a groundwork for further research on Covid-19.

Humanistic perspectives in virtual reference

2017 ◽  
Vol 66 (8/9) ◽  
pp. 695-710 ◽  
Author(s):  
Adolfo G. Prieto
Keyword(s):  
Emotional Intelligence ◽  
Future Study ◽  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Relevant Literature ◽  
Background Information ◽  
Virtual Reference ◽  
Content Type ◽  
Practical Applications ◽  
Practical Implications

Purpose Virtual reference is a part of the services offered at academic and other types of libraries. This paper discusses humanistic perspectives that merit consideration in the provision of virtual reference (VR), including mindfulness, authenticity, emotional intelligence (EI) and counseling. This study aims to make these perspectives become a part of the language and practice of virtual reference through this discussion. Design/methodology/approach The paper establishes a framework for the VR perspectives it discusses by examining relevant literature for background information and practical applications. Findings VR has the potential to benefit from the interrelated humanistic perspectives of mindfulness, authenticity, EI and counseling. It is through the counseling perspective that mindfulness, authenticity and EI are embodied to offer a more transformational and less transactional experience for both librarians and users. Research limitations/implications While the paper provides examples of language used by the author to illustrate the counseling perspective, a future study, whereby virtual reference transcripts are formally analyzed, may be beneficial to determine other expressions of counseling and its related perspectives of mindfulness, authenticity and EI. Practical implications This paper provides a resource especially helpful to individuals new to VR or who seek opportunities for growth in providing VR. Originality/value In addition to taking a multifaceted view of VR through the humanistic perspectives presented, this paper also offers a multidisciplinary approach in its discussion, drawing from areas such as business and medicine.

Conclusions: managing tourism sustainability in mountain destinations

2018 ◽  
Vol 10 (2) ◽  
pp. 267-273 ◽  
Author(s):  
Raphaël Dornier ◽  
Chiara Mauri
Keyword(s):  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Sharing Economy ◽  
Economic Aspects ◽  
Theme Issue ◽  
Mountain Areas ◽  
Content Type ◽  
Cross Border ◽  
Key Points ◽  
Strategic Issue

Purpose This paper aims to offer some key summary points drawn from the collection of articles gathered in this theme issue as to how Alpine destinations can manage tourism sustainability. Design/methodology/approach The paper summarizes the contribution made by different articles published in this issue and discusses their connection to the strategic issue of tourism sustainability. Findings The paper presents four key points that contribute to the debate on tourism sustainability: the sharing economy geared for winter mountain destinations; marketing perspectives on sustainability in winter mountain destinations; sustainability and transportation; and the institutional, legal and socio-economic aspects of sustainability. Originality/value Drawing on indicators of tourists’ behavior and from the findings of the articles published in this issue, this concluding study identifies the challenges that winter mountain destinations will have to address in the future. The originality and value of this issue lies in the multidisciplinary approach that was adopted – most research on sustainability tends to focus on a single academic stream. Moreover, the focus is on mountain areas with a cross-border perspective, whereas most research on sustainability is designed for a single country, and wider applicability is bounded by constraints.

An automatic switching approach of robotic components for improving robot localization reliability in complicated environment

2014 ◽  
Vol 41 (2) ◽  
pp. 135-144 ◽  
Author(s):  
Wenshan Wang ◽  
Qixin Cao ◽  
Xiaoxiao Zhu ◽  
Masaru Adachi
Keyword(s):  
Design Methodology ◽  
Substantial Improvement ◽  
Laser Range Finder ◽  
Robot Localization ◽  
Robotic Technology ◽  
Content Type ◽  
Laser Range ◽  
Localization System ◽  
Novel Approach ◽  
Automatic Switching

Purpose – Robot localization technology has been widely studied for decades and a lot of remarkable approaches have been developed. However, in practice, this technology has hardly been applied to common day-to-day deployment scenarios. The purpose of this paper is to present a novel approach that focuses on improving the localization robustness in complicated environment. Design/methodology/approach – The localization robustness is improved by dynamically switching the localization components (such as the environmental camera, the laser range finder and the depth camera). As the components are highly heterogeneous, they are developed under the robotic technology component (RTC) framework. This simplifies the developing process by increasing the potential for reusability and future expansion. To realize this switching, the localization reliability for each component is modeled, and a configuration method for dynamically selecting dependable components at run-time is presented. Findings – The experimental results show that this approach significantly decreases robot lost situation in the complicated environment. The robustness is further enhanced through the cooperation of heterogeneous localization components. Originality/value – A multi-component automatic switching approach for robot localization system is developed and described in this paper. The reliability of this system is proved to be a substantial improvement over single-component localization techniques.

scholarly journals Human remains as documents: implications for repatriation

2019 ◽  
Vol 76 (1) ◽  
pp. 258-270 ◽  
Author(s):  
Jim Berryman
Keyword(s):  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Cultural Anthropology ◽  
Human Remains ◽  
Biological Specimen ◽  
Content Type ◽  
Ethical Argument

Purpose The purpose of this paper is twofold. First, to investigate the documentality of human remains in museum and research collections. Second, to provide a rationale for a processual model of documentation, which can account for their repatriation and eventual burial. Design/methodology/approach This paper uses a multidisciplinary approach to examine the repatriation issue. It considers an ethical argument developed to support claims for repatriation: the nominal identification of a body as a universal criterion for its burial. Based on Igor Kopytoff’s processual model of commoditisation, it looks to cultural anthropology to help explain how objects can move between a document and non-document state. Findings Human remains can be understood as examples of information-as-thing. However, while document theory can readily account for the expanding realm of documentation, it cannot adequately accommodate instances where documentality is revoked, and when something ceases to be a document. When a human biological specimen is returned, the process that made it serve as a document is effectively reversed. When remains are interred, they revert to their primary standing, as people. The process of becoming a document is therefore not unidirectional, and document status not permanent. Research limitations/implications The implications of a processual model of documentation are discussed. Such a model must be able to account for things as they move into and out of the document state, and where the characteristics of documentality change through time. Originality/value This paper explores problematic material not usually discussed in relation to document theory. The repatriation movement poses a challenge to a discourse predicated on documentation as a progressively expanding field.

Short note: empirical findings for spatial and temporal discretization orders for the Taylor – Green vortex

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alejandro Figueroa ◽  
Rainald Löhner
Keyword(s):  
Finite Difference ◽  
Turbulent Flows ◽  
Design Methodology ◽  
Short Note ◽  
Grid Size ◽  
Numerical Dissipation ◽  
Finite Difference Schemes ◽  
Eighth Order ◽  
Content Type ◽  
Discretization Orders

Purpose The purpose of this paper is to shed some light into the equivalency of grid size and spatial and temporal orders of accuracy for turbulent flows. Design/methodology/approach This paper compared several finite difference schemes on various meshes and various orders of accuracy for the canonical Taylor–Green vortex testcase. Findings A remarkable empirical result observed is that the accuracy of eighth-order schemes on grids of size 2 h was equivalent to second-order schemes on grids of size h. This was the case when going from 1003 to 2003 as well as from 2003 to 4003. In all these cases, kinetic energy, vorticity and numerical dissipation were compared in detail. Research limitations/implications The results obtained were carried out using finite difference solvers. It remains to be seen if similar behaviors are also observed for other numerical schemes. Originality/value These (surprising) findings should be of interest to the larger community.

Evaluation of the usability of the Canay’s equivalent circuit diagrams for the calculation of subsynchronous resonances

2019 ◽  
Vol 38 (4) ◽  
pp. 1347-1356
Author(s):  
Marek Gołębiowski ◽  
Carsten Göbel
Keyword(s):  
Finite Difference ◽  
Equivalent Circuit ◽  
Dynamic Behavior ◽  
Material Properties ◽  
Design Methodology ◽  
Short Circuit ◽  
Circuit Diagram ◽  
Content Type ◽  
Network Generator ◽  
Simulation Results

Purpose In the shaft and end windings of large turbogenerators, unacceptably high mechanical stresses can occur as a result of subsynchronous resonances (SSRs) in the system network-generator-shaft. These stresses can cause severe damages. Subsynchronous resonances are characterized by the occurrence of currents and electromagnetic torques in the air gap of the generator with frequencies that are significantly below the synchronous frequency. When simulating the balancing processes in multi-machine networks, the generators are represented by Canay’s equivalent circuit diagrams. The parameters used here are determined from geometric dimensions of the generator, taking into account material properties, and verified by means of surge short-circuit tests in which the 50 and 100 Hz components are dominant. This paper aims to examine whether the parameters of the equivalent circuit diagram determined in this way reproduce correctly the dynamic behavior of a synchronous machine, even if the SSR occur. Design/methodology/approach The simulation program NETOMAC is used to simulate the SSRs for different parameters. The results of these simulations are then compared with those obtained by the finite difference (FD) method calculations. Findings The comparison of the waveforms calculated with NETOMAC and FELMEC for an SSR shows that the original equivalent circuit diagram parameters provide satisfactory results. An extension of Canay’s equivalent circuit diagram is not necessary. Optimization of the discussed parameters leads to a significant improvement in comparison to the calculation with the parameters from the generator data sheet. Originality/value The unresolved doubt has been proven, that the Parka generator model with the manufacturer’s parameters can also be used for subsynchronous studies of electromechanical resonances of systems. However, it was advisable to improve the simulation results by optimizing the generator parameters used in the calculations. By optimizing the parameters for the SSRs, the calculation of the occurring torques has been significantly improved.

Demateriality

2015 ◽  
Vol 10 (1) ◽  
pp. 76-90
Author(s):  
Eric Fimbel ◽  
Anne-Sophie Binninger ◽  
Catherine Karyotis
Keyword(s):  
Design Methodology ◽  
Information Technologies ◽  
Multidisciplinary Approach ◽  
Social Power ◽  
Modern World ◽  
Content Type ◽  
Current Role ◽  
Technology Marketing ◽  
The Relationship

Purpose – The purpose of this article is to analyze the symbolic and practical impacts of demateriality in two areas that are emblematic of the way the modern world operates. Firstly, finance via currency, and secondly, trade via the relationship between trading firms and their customers. The article also addresses the current role played by so-called “information” technologies, exploring the double embedding of society within trade and trade within finance. Design/methodology/approach – A multidisciplinary approach which mobilizes available knowledge in finance, technology, marketing and sociology. Findings – The overall social power of the state of demateriality is that it reinforces the double-embedding. Originality/value – A multidisciplinary approach which mobilizes available knowledge in finance, technology, marketing and sociology to comprehend the role of a state, beyond the process creating that state.

“I got the power!”: An exploration of contemporary fetishism

2019 ◽  
Vol 22 (5) ◽  
pp. 781-795
Author(s):  
Ziyed Guelmami
Keyword(s):  
Design Methodology ◽  
Multidisciplinary Approach ◽  
Contextual Factors ◽  
Personal Goals ◽  
Content Type ◽  
Factors Influencing ◽  
Magical Power ◽  
Definition Of ◽  
Depth Interviews ◽  
Magical Beliefs

Purpose This paper aims to discuss the concept of fetishism as an important but understudied kind of magical relationship to objects. Fetishism in the context of contemporary consumption is conceptualized as a multilayered construct underlining the attribution of an aura and magical power to a product to achieve personal goals. Design/methodology/approach In total, 15 in-depth interviews were conducted to highlight contextual factors influencing the emergence of fetishism in contemporary consumption, to underline the instrumental and aspirational dimensions of fetishism and to provide a definition of contemporary product fetishism. Findings The results show that fetishism appears as fragmented and unstable magical beliefs toward products related to a need to cope with uncertain and important aspirational situations. Originality/value The paper provides a multidisciplinary approach of fetishism to provide insights regarding this phenomenon and its manifestations in the context of contemporary consumption.

An analysis of the viability of micro health takaful in Malaysia

2015 ◽  
Vol 7 (1) ◽  
pp. 37-71 ◽  
Author(s):  
Sheila Nu Nu Htay ◽  
Nur Shazwani Sadzali ◽  
Hanudin Amin
Keyword(s):  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Design Methodology ◽  
Poor People ◽  
Content Type ◽  
Mutual Help ◽  
The Poor ◽  
The Government ◽  
Corporate Social ◽  
Experimental Stage

Purpose – This research aims to examine the viability of micro-health takaful in Malaysia. Current practices in the takaful industry in Malaysia reveal that takaful operators (TOs) are keen on offering products that are affordable for middle- to high-income people. However, the concept of takaful is based on mutual help, and, hence, it is believed that TOs should offer products affordable by the poor and lower income people. Design/methodology/approach – To achieve this objective, the interest of the poor to participate in this product is examined by sending the questionnaire. In addition, TOs were approached to understand why micro-health takaful products have not been offered as yet. The regulator was also interviewed to gauge whether the government is supportive of this scheme. Findings – From the survey, it was noted that the poor people are interested to participate in such a scheme. However, most of them are only willing to contribute about RM5 per month, while some of the respondents, especially, zakat recipients are unable to afford to pay at all. The zakat authority when interviewed stated they were unable to contribute on behalf of the zakat recipients. To a certain extent, zakat authority is required to obtain an approval from the National Fatwa Council with regard to that issue. The regulator views that the micro takaful is still in an experimental stage. From the perspective of TOs, it might be viable if the product is offered as part of the corporate social responsibility, rather than by individual operators. Therefore, it could be summed up that micro-health takaful will be viable if and only if TOs collectively offer it as a part of their corporate social responsibility, and it must be subsidized by the zakat or waqf authorities. Research limitations/implications – Particularly, this study only considers a limited geography in Malaysia to understand the viability of micro-health. On the same note, the current focus of the study is on micro-health takaful in which it has not tapped other potential micro takaful products. Originality/value – This study is a pioneering effort in understanding the viability of the micro health takaful in Malaysia.

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