A time discontinuous Galerkin isogeometric analysis method for non-Fourier thermal wave propagation problem

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yang Xia ◽  
Pan Guo
Keyword(s):  
Wave Propagation ◽  
Discontinuous Galerkin ◽  
Heat Wave ◽  
Isogeometric Analysis ◽  
Numerical Instability ◽  
Analysis Method ◽  
Content Type ◽  
Mesh Dependency ◽  
Spurious Oscillations ◽  
Stability And Accuracy

Purpose Numerical instability such as spurious oscillation is an important problem in the simulation of heat wave propagation. The purpose of this study is to propose a time discontinuous Galerkin isogeometric analysis method to reduce numerical instability of heat wave propagation in the medium subjected to heat sources, particularly heat impulse. Design/methodology/approach The essential vectors of temperature and the temporal gradients are assumed to be discontinuous and interpolated individually in the discretized time domain. The isogeometric analysis method is applied to use its property of smooth description of the geometry and to eliminate the mesh-dependency. An artificial damping scheme with proportional stiffness matrix is brought into the final discretized form to reduce the numerical spurious oscillations. Findings The numerical spurious oscillations in the simulation of heat wave propagation are effectively eliminated. The smooth description of geometry with spline functions solves the mesh-dependency problem and improves the numerical precision. Originality/value The time discontinuous Galerkin method is applied within the isogeometric analysis framework. The proposed method is effective in the simulation of the wave propagation problems subjecting to impulse load with numerical stability and accuracy.

The “Halalification” of tourism

2017 ◽  
Vol 8 (4) ◽  
pp. 558-577 ◽  
Author(s):  
Faiza Khan ◽  
Michelle Callanan
Keyword(s):  
Design Methodology ◽  
Secondary Data ◽  
Market Segment ◽  
Analysis Method ◽  
Review Of Literature ◽  
Primary Research ◽  
Content Type ◽  
Starting Point ◽  
Practical Implications

Purpose The purpose of this paper is to address the confusing use of terminology associated with tourism undertaken by Muslims and to identify key concerns associated with this type of tourism. Design/methodology/approach This is an exploratory study and adopts a critical review of literature following the evolutionary concept analysis method. Content analysis of popular UK media, UK-based tour operators’ websites and tourism strategies of destinations popular with Muslim tourists were conducted to examine the use of terminology. Findings There is no clear difference between the various terms (halal, Muslim friendly, Islamic, etc.) used. Overall, academia uses the term Islamic tourism, while the industry and media use various terms. Among destinations, however, there is no clear and consistent use of terminology. A key concern of Islamic tourism is the role of certification in assuring travellers and the lack of standardisation of halal certification. Research limitations/implications The paper is based on literature review and secondary data analysis. It lacks primary research. Practical implications This study highlights the need for consistent use of terminology across industry. Another implication is the issue surrounding halal certification of food and the importance of trust in the seller/service provide. Another trend that industry providers need to consider is the growth of the Muslim millennial traveller and the needs of this market segment. Originality/value The paper highlights the importance of studying the Muslim tourist market and provides a starting point for further research. It highlights several issues such as the need to develop a typology of Muslim tourists. Of particular interest is the concern whether halal values in danger of being commodified in the absence of a universal agreed criterion for halal certification.

An environmental impact analysis method of machine-tool cutting units based on LCA

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Junli Shi ◽  
Junyu Hu ◽  
Mingyang Ma ◽  
Huaizhi Wang
Keyword(s):  
Environmental Impact ◽  
Machine Tool ◽  
Energy Demand ◽  
Impact Analysis ◽  
Primary Energy ◽  
Analysis Method ◽  
Environmental Impact Analysis ◽  
Content Type ◽  
Primary Energy Demand ◽  
Tool Cutting

Purpose The purpose of this paper is to present a method for the environmental impact analysis of machine-tool cutting, which enables the detailed analysis of inventory data on resource consumption and waste emissions, as well as the quantitative evaluation of environmental impact. Design/methodology/approach The proposed environmental impact analysis method is based on the life cycle assessment (LCA) methodology. In this method, the system boundary of the cutting unit is first defined, and inventory data on energy and material consumptions are analyzed. Subsequently, through classification, five important environmental impact categories are proposed, namely, primary energy demand, global warming potential, acidification potential, eutrophication potential and photochemical ozone creation potential. Finally, the environmental impact results are obtained through characterization and normalization. Findings This method is applied on a case study involving a machine-tool turning unit. Results show that primary energy demand and global warming potential exert the serious environmental impact in the turning unit. Suggestions for improving the environmental performance of the machine-tool turning are proposed. Originality/value The environmental impact analysis method is applicable to different machine tools and cutting-unit processes. Moreover, it can guide and support the development of green manufacturing by machinery manufacturers.

Practice of the member states of the European Union in the field of anti-corruption regulation

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dmytro S. Melnyk ◽  
Oleg A. Parfylo ◽  
Oleksii V. Butenko ◽  
Olena V. Tykhonova ◽  
Volodymyr O. Zarosylo
Keyword(s):  
European Union ◽  
System Analysis ◽  
The European Union ◽  
Analysis Method ◽  
Member States ◽  
Content Type ◽  
Eu Member States ◽  
Legal Method ◽  
Content Analysis Method ◽  
The Eu

Purpose The experience of most European Union (EU) Member States has demonstrated effective anti-corruption practices, making the EU one of the leaders in this field, which can be used as an example to learn from in the field of anti-corruption. The purpose of this study is to analyze and identify the main features of anti-corruption legislation and strategies to prevent corruption at the national and supranational levels of the EU. Design/methodology/approach The following methods were used in the work: discourse and content analysis, method of system analysis, method of induction and deduction, historical-legal method, formal-legal method, comparative-legal method and others. Using the historical and legal method, the evolution of the formation of anti-corruption regulation at the supranational level was revealed. The comparative law method helped to compare the practices of the Member States of the EU in the field of anti-corruption regulation. The formal-legal method is used for generalization, classification and systematization of research results, as well as for the correct presentation of these results. Findings The main results, prospects for further research and the value of the material. The paper offers a critical review of key EU legal instruments on corruption, from the first initiatives taken in the mid-1990s to recent years. Originality/value In addition, the article analyzes the relevant anti-corruption legislation in the EU member states that are in the top 10 countries with the lowest level of corruption, namely: Denmark, Finland, Sweden, the Netherlands, Germany and Luxembourg.

Social media as a platform for information and support for coronavirus: analysis ofCOVID-19 Facebook groups

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hossein Motahari-Nezhad ◽  
Maryam Shekofteh ◽  
Maryam Andalib-Kondori
Keyword(s):  
Health Care ◽  
Health Care Providers ◽  
Design Methodology ◽  
Information Needs ◽  
Descriptive Statistics ◽  
Public Knowledge ◽  
Care Providers ◽  
Analysis Method ◽  
Content Type ◽  
Content Analysis Method

Purpose This study aims to investigate the characteristics, as well as the purpose and posts of the COVID-19 Facebook groups. Design/methodology/approach A systematic search for COVID-19 Facebook groups was conducted on June 1, 2020. Characteristics of the groups were examined using descriptive statistics. Mann-Whitney test was used to study the differences between groups. The study of the most popular groups’ posts was also carried out using the content analysis method. Findings The groups had a combined membership of 2,729,061 users. A total of 147,885 posts were received. There were about approximately 60% public groups. A high percentage of the groups (86.5%) had descriptions. The results showed a significant relationship between the groups’ description status and the number of members (p-value = 0.016). The majority of COVID-19 Facebook groups (56%) were created to meet their members’ information needs. The highest number of studied posts were related to vaccination (35.2%), followed by curfew rules (19.6%) and symptoms (10.6%). Originality/value Translating these insights into policies and practices will put policymakers and health-care providers in a stronger position to make better use of Facebook groups to support and enhance public knowledge about COVID-19.

Constructing the ideal SRI (sustainability reporting index) framework for Indonesian market: combined perspectives from rating agencies, academics, and practitioners

2019 ◽  
Vol 15 (5) ◽  
pp. 573-596 ◽  
Author(s):  
Sita deliyana Firmialy ◽  
Yunieta Anny Nainggolan
Keyword(s):  
Factor Analysis ◽  
Content Analysis ◽  
Exploratory Factor Analysis ◽  
Social Performance ◽  
Sustainability Reporting ◽  
Analysis Method ◽  
Content Type ◽  
Rating Agencies ◽  
Social Environmental ◽  
Social Rating

Purpose This study aims to focus on developing the sustainability reporting index (SRI) with combined perspectives from varied social rating agencies, along with integrated combined perspectives from academics experts and Indonesian companies. Design/methodology/approach The first section discusses the theoretical framework along with the sustainability challenges faced by companies in Indonesia. The second section develops the methodology of the study to measure the SRI by considering practical and theoretical perspectives, starting from the identification of initial disclosure, selecting the final disclosure and developing the hierarchical framework. Lastly, the third section confirms the validity of the study’s framework by the exploratory factor analysis method and its comparability by comparing the content analysis result of the study with the Kinder–Lydenberg–Domini (KLD) method. The content analysis was used to analyze annual reports, sustainability reports and companies’ websites based on indicators found in the resulted model. Findings The main finding is the SRI framework (SRIF) of the study, which is built on the basis of the stakeholder relationship theory and is focused on three main dimensions (social, economic and environmental). Specifically, the framework consists of 17 indicators and 93 sub-indicators. On the basis of factor analysis method, it can be safely said that the study’s SRIF is quite valid. The high score of correlations between the SRIF and KLD results at the composite and dimension levels, along with the statistically significant results show that the study’s SRIF results and KLD results are fairly similar. Research limitations/implications The present study has its limitation as it only gathers data from publicly available reports issued by the firms (secondary data). Owing to time limitation, primary data are not collected. However, this is also the strength of this research as it will allow investors to replicate the study’s methodology to measure companies’ sustainability. Practical implications The study is useful to organizations and statutory bodies toward finding a replicable method to measure the Indonesian companies’ social performance. In addition, the study also introduced the usefulness of the qualitative program Atlas TI to perform content analysis, the exploratory factor analysis method to ensure validity and comparability by comparing it to the KLD methodology, which is known globally as the most widely accepted methodology to measures social performance. Lastly, this study will provide implications to the Government to ascertain the level of SRI reporting among the Indonesian public-listed companies. Originality/value The resulted framework in this study simultaneously considers social, environmental and economic factors in the context of companies in Indonesia, while previous researchers have constructed reporting index separately (i.e. Sumiani et al., 2007; Zhao et al., 2012). Especially in the context of Indonesia, there is no such index simultaneously focused on the three main dimensions, namely, social, environmental and economics. The current study tries to fill the gap by using the constructed SRI index based on three perspectives combined, namely, social rating agencies, academic theorist and Indonesian companies.

Modeling schedule overrun and cost escalation percentages of highway projects using fuzzy approach

2017 ◽  
Vol 24 (5) ◽  
pp. 809-827 ◽  
Author(s):  
Ahmed Ebrahim Abu El-Maaty ◽  
Amr M. El-Kholy ◽  
Ahmed Yousry Akal
Keyword(s):  
Linear Regression ◽  
Design Methodology ◽  
Fuzzy Theory ◽  
Linear Regression Analysis ◽  
Fuzzy Approach ◽  
Analysis Method ◽  
Highway Projects ◽  
Content Type ◽  
Theoretical And Numerical Analysis ◽  
Better Than

Purpose Modeling represents the art of translating problems from an application area into tractable mathematical formulations whose theoretical and numerical analysis provides insight, answers and guidance useful for the originating application. The purpose of this paper is to determine the causal causes of schedule overrun and cost escalation of highway projects in Egypt in order to be used as independents variables in mathematical models for predicting the percentages of schedule overrun and cost escalation of such projects in Egypt. Design/methodology/approach A survey of a randomly selected samples yielded responses from 40 owners, 15 consultants and 56 contractors. The survey includes 38 schedule overrun factors and 26 cost escalation factors. The effectiveness degree of the identified factors has been identified by the triangle fuzzy approach. Findings The results of the survey show that “contractor’s technical staff is insufficient and ineligible to accomplish the project” is the most important cause of schedule overrun, while the major cause of cost escalation is inadequate preparation of the project concerning planning and execution. Originality/value The main contribution of this study is predicting the percentages of schedule overrun and cost escalation of highway projects in Egypt. Through the application of the linear regression analysis method and statistical fuzzy theory, four predictive models have been developed and it has been noted that the linear regression-based model shows prediction accuracy better than statistical fuzzy-based model in predicting percentages of schedule overrun and cost escalation.

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