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Article
Publication date: 1 February 1992

RICARDO DOBRY and AND TANG‐TAT NG

A general overview is presented on applications of the discrete element method (DEM) to granular media. A literature survey is performed of static and dynamic simulations using…

Abstract

A general overview is presented on applications of the discrete element method (DEM) to granular media. A literature survey is performed of static and dynamic simulations using random arrays of compliant particles, and forty‐two references published mostly in the last ten years are identified and categorized according to a number of relevant criteria. It is concluded that the interest in the use of the technique is rapidly increasing in the research and engineering community, with applications concentrated in soil mechanics, rock mechanics, grain flow and engineering problems. Additional studies and verifications of some numerical aspects of the DEM technique are suggested including parametric studies and comparisons. Program CONBAL‐2 (CONTACT + TRUBAL in 2D) developed by the authors based on TRUBAL created by Strack and Cundall, is described. CONBAL‐2 uses the complete Mindlin solution for the contact between two spheres and thus can be used for small strain and cyclic loading. The program is applied to study the cyclic response of uniform, medium dense to dense rounded quartz sand. Cyclic strain‐controlled loading at constant volume is applied to isotropically consolidated, random arrays of 531 spheres, using cyclic strains ranging from 10–4% to 10–1%. The calculated shear modulus, Gmax, constrained modulus, D, and Poisson's ratio at small strains are correlated with the confining pressure, the porosity of the array, and the coordination number. The calculated variations of secant modulus and damping ratio with cyclic strain compare favourably with the experimental results on sands compiled by Seed and Idriss. Finally, ‘pore water pressure buildup’ and cyclic stiffness degradation of the material with number of cycles is calculated at a cyclic strain of 10–1%, and the prediction is found to represent closely cyclic undrained experiments on sands. The existence of a threshold strain, yt ≈ 10–2%, found experimentally, is also predicted by the simulations.

Details

Engineering Computations, vol. 9 no. 2
Type: Research Article
ISSN: 0264-4401

Keywords

Book part
Publication date: 7 November 2022

David Jesuit

This chapter summarizes public perceptions and expert evaluations concerning elected officials' levels of corruption, focusing on comparisons between the United States and 29…

Abstract

This chapter summarizes public perceptions and expert evaluations concerning elected officials' levels of corruption, focusing on comparisons between the United States and 29 European Union “plus” (EU+) countries (28 EU Member States in 2018 plus Switzerland). While surveys of corruption have become more widely available in recent years, there is still a lack of comparable data focusing on specific government institutions, rather than general perceptions of corruption by elected or public officials. Thus, this study takes advantage of four major sources of citizens' perceptions of corruption to develop an average score and ranking for a total of 30 countries: the 2017 Global Corruption Barometer, the 2017 Eurobarometer subtitled “Integration of Immigrants in the European Union and Corruption,” the 2016 International Social Survey Program's (ISSP) Module on the “Role of Government V,” and the Pew Research Center's 2018 “Global Attitudes & Trends Survey.” Three expert assessments of levels of corruption supplement these surveys: the Varieties of Democracy (V-Dem) Project's measure of legislative corruption, Transparency International's Corruption Perceptions Index (CPI) 2016, and the World Bank's 2016 Worldwide Governance Indicators (WGI) assessment of the “Control of Corruption.” Finally, the chapter tests several hypotheses derived from the literature using the various corruption measures as the dependent variable and finds that choosing a measure of corruption based on citizens' perceptions or expert evaluations is substantively important. Thus, one must exercise caution when selecting one type of measure over the other.

Article
Publication date: 6 June 2019

Ali Bassam Mahmoud, Nicholas Grigoriou, Leonora Fuxman, Dieu Hack-Polay, Fatina Bassam Mahmoud, Eiad Yafi and Shehnaz Tehseen

This study aims to assess consumers’ beliefs in three Middle Eastern Arab countries regarding attitudinal and behavioural responses towards permission-based direct email marketing…

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Abstract

Purpose

This study aims to assess consumers’ beliefs in three Middle Eastern Arab countries regarding attitudinal and behavioural responses towards permission-based direct email marketing (hereafter DEM) and the moderating role of gender in the hypothesised path model.

Design/methodology/approach

Structural equation modelling was used to test the hypothesised path model by using data collected from 829 respondents.

Findings

The findings show that attitude was found to fully mediate the relationship between beliefs and behavioural responses towards permission-based DEM. Gender moderates the relationship between beliefs and attitudes and responses to permission-based DEM. Notably, female respondents were found to react more actively when exposed to permission-based DEM.

Research limitations/implications

Further qualitative research is needed to learn more about how and why individuals develop behavioural intentions in certain ways towards opt-in DEM. In addition, neuropsychology approaches such as eye-tracking are endorsed for future research to gain more insights and conquer biases associated with self-reporting procedures in countries where such technologies are deemed as legal and ethical to be used with human subjects.

Practical implications

Advertisers promoting products and services in the Middle Eastern Arab context should take further steps to enhance the quality of information (including cultural sensitiveness) and the perceived entertainment value that could be delivered to consumers through permission-based DEM, especially for female internet users. Additionally, this study highly recommends the double opt-in approach to permission-based DEM.

Originality/value

To the best of the authors’ knowledge, this is the first attempt to address the gender role as a moderator of the path depicting the effectiveness of permission-based DEM approach in the Middle East (Arab counties) from beliefs to behavioural responses via attitudes.

Details

Journal of Research in Interactive Marketing, vol. 13 no. 2
Type: Research Article
ISSN: 2040-7122

Keywords

Article
Publication date: 1 February 2000

Yaw A. Debrah and Ian G. Smith

Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on…

11565

Abstract

Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on work and employment in contemporary organizations. Covers the human resource management implications of organizational responses to globalization. Examines the theoretical, methodological, empirical and comparative issues pertaining to competitiveness and the management of human resources, the impact of organisational strategies and international production on the workplace, the organization of labour markets, human resource development, cultural change in organisations, trade union responses, and trans‐national corporations. Cites many case studies showing how globalization has brought a lot of opportunities together with much change both to the employee and the employer. Considers the threats to existing cultures, structures and systems.

Details

Management Research News, vol. 23 no. 2/3/4
Type: Research Article
ISSN: 0140-9174

Keywords

Article
Publication date: 1 March 1949

H. SCHURER

THE list given below is based on the selection presented in Dr. Joris Vorstius's Ergebnisse und Fortschritte der Bibliographie in Deutschland seit dem ersten Weltkrieg

Abstract

THE list given below is based on the selection presented in Dr. Joris Vorstius's Ergebnisse und Fortschritte der Bibliographie in Deutschland seit dem ersten Weltkrieg (Zentralblatt für Bibliothekswesen, Beiheft 74. Leipzig: Harrassowitz 1948, pp.v.172). Up to recently Dr. Vorstius was Director of the Öffentliche Wissenschaftliche Bibliothek in Berlin, the former Prussian State Library, and he has been the editor of the Zentralblatt since 1947. In addition to this survey of bibliographical work done in Germany, he has recently published a study of subject cataloguing in several of the large German learned libraries (Die Sachkatalogisierung in den wisseuschaftlichen Allgemeinbibliotlieken Deutschlands. Leipzig: Harrassowitz 1948, pp.viii.58) and a revised edition of his sketch of library history (Grundzüge der Bibliotheksgeschichte. Vierte, erweiterte Auflage. Leipzig: Harrassowitz 1948, pp.vii.114). In his survey of German bibliography Dr. Vorstius has aimed at making his selection in such a manner as to give a representative cross‐section of the bibliographies devoted to all important fields of scholarship. Works are listed according to their significance irrespective of the form in which they were issued, as monographs, appendixes to books, or contributions to serials. As the book is not likely to come the way of many British librarians, it has been thought useful to give a tabulated survey of bibliographical work done in Germany during the war years covering the period when there was least cultural contact between Germany and England. While thus cutting off a good slice at the beginning of the period covered by Dr. Vorstius's book, I have been able to extend the time range to include the post‐war period. When Dr. Vorstius surveyed the field in 1947, German bibliographical activity had reached a nadir after declining steeply from the second half of the war onwards. For the whole of 1945 Dr. Vorstius lists one single bibliography, devoted to the literature on doves and pigeons. From this trough of the graph, a slightly ascending curve led to the compilation of the first three German post‐war bibliographies, all of them black lists of Nazi literature compiled for purge purposes. That was the only sign of any revival of bibliographic production Dr. Vorstius was able to record. Writing two years later I have been in a position to expand the post‐war component of the list considerably, at least, relatively speaking. Again, in a field where Germany could take a justified pride in her achievement, in the publication of the numerous current bibliographies, Dr. Vorstius's survey of the numerous Zentralblätter and Jahresberichte is a list of war casualties. All these publications had come to an end, most of them long before the end of the war. Dr. Vorstius's book only records the revival of two, the Deutsche National‐bibliographie and the Deutsche Literaturzeitung. Now the list is considerably longer. Considerations of space have prevented me from listing all the extinct current bibliographies with their dates of stoppage under their appropriate headings; I have limited myself to listing those which have been revived or started since the end of the war and those which were started (and in practically all cases came to a speedy end) during the war.

Details

Journal of Documentation, vol. 5 no. 2
Type: Research Article
ISSN: 0022-0418

Article
Publication date: 2 February 2023

Ahmed Hamdy, Jian Zhang and Riyad Eid

This study's goal is to look at how visitors' experiences affect the indirect links between the destination's extrinsic motivations (DEMs) and tourists' intrinsic motives (TIMs)…

Abstract

Purpose

This study's goal is to look at how visitors' experiences affect the indirect links between the destination's extrinsic motivations (DEMs) and tourists' intrinsic motives (TIMs), on the one hand, and the perceived destination image (PDI), on the other.

Design/methodology/approach

Using structural equation modeling, 613 tourists from different nationalities were used to test the five hypotheses.

Findings

The research results revealed that second-order destinations' extrinsic motivations directly impact TIM and PDI. It also showed that tourists' experiences as moderators reduce the direct effect of DEM on PDI for first-time visitors compared to repeat visitors. Moreover, it increases the direct effect of TIM on PDI for repeated visitors.

Practical implications

Destination managers can fix the problems that hurt their reputations and images by hiring police officers in tourist areas and cleaning tourist places. In the same way, destination managers and travel agencies should use AI tools to create social media marketing campaigns focusing on natural and historical monuments. Also, the marketing plans should stress the value for money (for example, lodging, food and attractions’ cost). Finally, destination marketers can make programs for repeat visitors, focusing on DEM and TIM.

Originality/value

This article tries to fill a gap in the research on PDI formation in emerging markets as a modern technique in destination marketing by using the push-intrinsic and pull-extrinsic theories. It also looks at how the tourists' experiences moderate the direct link between DEM, TIM and PDI. Lastly, this study examines how TIM affects a destination's image in emerging markets.

Book part
Publication date: 11 December 2023

Kamil Jonski and Wojciech Rogowski

Recent academic studies, as well as media reporting, have devoted substantial attention to the ongoing “crisis of democracy.” Democratic “backsliding” of Central and Eastern…

Abstract

Recent academic studies, as well as media reporting, have devoted substantial attention to the ongoing “crisis of democracy.” Democratic “backsliding” of Central and Eastern Europe – sometimes referred to as an effort to establish a new system of “illiberal democracy” – is one of the most visible symptoms of this crisis. This narrative is supported by the quantitative metrics of democratic quality, reflecting professional community views on the appropriate criteria to define and assess democracy. However, once general public views expressed in the survey item of “satisfaction with democracy” are taken into account, the picture changes markedly. This chapter analyzes quantitative metrics reflecting expert community consensus and the general public assessment of the quality of democracy in the 27 EU members over the period 2010–2019. It documents substantial divergence between the perspectives of the experts and the general public – while expert-based indexes portray Central and Eastern European backsliding as the most significant trend in the EU democratic landscape, public opinion identifies a very different set of democracy's successes and failures. As experts and the general public fail to arrive at mutually accepted criteria of democratic performance evaluation, public debate has become futile. Meaningful discussion and systemic corrections have become unlikely, creating conditions easily exploitable by the populists, eager to frame it as an example of “elite” detachment from the “ordinary people”.

Details

The Economics and Regulation of Digital Markets
Type: Book
ISBN: 978-1-83797-643-0

Keywords

Article
Publication date: 13 December 2018

Thomas Belz, Dominik von Hagen and Christian Steffens

Using a meta-regression analysis, we quantitatively review the empirical literature on the relation between effective tax rate (ETR) and firm size. Accounting literature offers…

Abstract

Using a meta-regression analysis, we quantitatively review the empirical literature on the relation between effective tax rate (ETR) and firm size. Accounting literature offers two competing theories on this relation: The political cost theory, suggesting a positive size-ETR relation, and the political power theory, suggesting a negative size-ETR relation. Using a unique data set of 56 studies that do not show a clear tendency towards either of the two theories, we contribute to the discussion on the size-ETR relation in three ways: First, applying meta-regression analysis on a US meta-data set, we provide evidence supporting the political cost theory. Second, our analysis reveals factors that are possible sources of variation and bias in previous empirical studies; these findings can improve future empirical and analytical models. Third, we extend our analysis to a cross-country meta-data set; this extension enables us to investigate explanations for the two competing theories in more detail. We find that Hofstede’s cultural dimensions theory, a transparency index and a corruption index explain variation in the size-ETR relation. Independent of the two theories, we also find that tax planning aspects potentially affect the size-ETR relation. To our knowledge, these explanations have not yet been investigated in our research context.

Details

Journal of Accounting Literature, vol. 42 no. 1
Type: Research Article
ISSN: 0737-4607

Keywords

Article
Publication date: 8 January 2024

Samwel Sanga Alananga

The purpose of this study is to examine households’ behavior towards dirty cooking energy utilisation in an environment where relatively higher accessibility to clean energy is…

Abstract

Purpose

The purpose of this study is to examine households’ behavior towards dirty cooking energy utilisation in an environment where relatively higher accessibility to clean energy is noted. Although the low utilisation rate of clean energy can partly be attributed to utility gains anticipated in dirty energy mixes (DEMs) arising out of accessibility constraints, affordances and enablers, it is still unclear on the extend at which each of these contributes towards DEMs manifestation among the seemingly well-to-do households with higher levels of clean energy mixes (CEM) access. This study, therefore, hinges on scrutinising on this lower utilisation patterns despite a seemingly higher accessibility of CEMs, specifically liquified petroleum gases (LPG).

Design/methodology/approach

The study is based on a household’s survey that was carried out in 2018, reaching a sample of 393 households using questionnaires in four wards of the Kigamboni district in Tanzania. Subsequent analyses were descriptive as well as inferential based on binary logistic regression analysis where utilisation of DEMs was predicted for both the high and low social economic status (SES) households by incorporating accessibility constraints, affordances and enablers.

Findings

The results show, first, if one assumes energy stacking is not an issue, as households become more constrained towards CEMs utilisation, they shift towards DEMs suggesting that the overall effect is a substitution, and second, the complementarity effect ultimately outweighs the substitution effect as households do not shift from DEMs to CEMs rather stack multiple energy. DEMs flourish in this case study area because those with high income are among those in the lowest SES, and some of those with the highest SES are from among the lowest income category, and all of them end up with more DEMs because shifting towards CEMs require income to complement SES.

Practical implications

Policy-wise, removing hurdles in accessing CEMs such as LPG subsidy programme, gas stove provision to the poor, and enhanced LPG awareness will most likely benefits only those who do not stack energy in cooking while strategies targeting those at the lowest SES such as higher education attainment, empower women as a family decision maker, encourage co-occupancy to enlarge the household size and contain urban growth within certain perimeter will have a significant impact only if they raise both incomes and SES.

Originality/value

Despite of the dominance of DEMs for cooking such as charcoal and firewood in Tanzania, CEMs such as LPG, have emerged as complements or alternatives in the household energy basket. The utilisation of such CEMs is, however, still very low despite the accessibility, cost, environmental and health advantages they offer. Accessibility is not the only factor fuelling CEMs; a complementarity must exist between SES and income for the positive transition towards CEMs to be realised.

Details

International Journal of Energy Sector Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 1 September 2005

Rachel Ashworth, Tom Entwistle, Julian Gould‐Williams and Michael Marinetto

This monograph contains abstracts from the 2005 Employment Research Unit Annual Conference Cardiff Business School,Cardiff University, 6‐7th September 2005

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Abstract

This monograph contains abstracts from the 2005 Employment Research Unit Annual Conference Cardiff Business School, Cardiff University, 6‐7th September 2005

Details

Management Research News, vol. 28 no. 9
Type: Research Article
ISSN: 0140-9174

Keywords

1 – 10 of over 1000