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The purpose of this research is to explore and define the digital maturity of events using the Industry 4.0 model (I4.0) to create a definition for Events 4.0 (E4.0) and to place various relevant technologies on a scale of digital maturity.

In a mixed methods approach, we carried out a qualitative social media analysis and a quantitative survey of tourism and events academics. These surveys and the thorough literature review that preceded them allowed us to map the digital technologies used in events to levels of a digital maturity model.

We found that engagement with technology at events and delegate knowledge satisfactorily coexists for and across a number of different experiential levels. However, relative to I4.0, event research and the events industry appear to be digitally immature. At the top of the digital maturity scale, E4.0 might be defined as an event that is digitally managed; frequently upgrades its digital technology; fully integrates its communication systems; and optimizes digital operations and communication for event delivery, marketing, and customer experience. We expect E4.0 to drive further engagement with digital technologies and develop further research.

This study has responded to calls from the academic literature to provide a greater understanding of the digital maturity of events and how events engage with digital technology. Furthermore, the research is the first to introduce the concept of E4.0 into the academic literature. This work also provides insights for events practitioners which include the better understanding of the digital maturity of events and the widespread use of digital technology in event delivery.

DELIVERY of the first of 12 Boeing 757's powered by Rolls‐Royce RB 211–535 E4 turbofans was made to Eastern Airlines in October and the aircraft entered service with the carrier a short while afterwards. This followed a comprehensive programme of testing which culminated in certification of the powerplant by the FAA. Flight testing included engine operating characteristics, in‐flight starts and general aircraft performance as well as flight deck electronic/engine compatibility and the collection of pertinent data for flight manual revisions. Eastern Airlines at present operates a fleet of fifteen RB 211–535 C powered 757's which will be retrofitted with the —535 E4. In the UK, Monarch Airlines' Boeing 757's will also be retrofitted with the new engines.

The paper uncovers a mathematical error in George Spencer-Brown's genesis of re-entry. It distinguishes between the two interpretations of re-entry presented in “Laws of Form”: recursive versus sequential. The Indeterminacy inferred by George Spencer-Brown from his recursive genesis of re-entry is refuted in three different ways. The calculation of the Modulator from “Laws of Form” demonstrates that only the sequential interpretation of re-entry is reasonable. This contributes to the demystification of re-entry and enables a deeper understanding. Finally, six differences between the concept of form from “Laws of Form” and Niklas Luhmann's sociological systems theory are presented.

Methodologically, the paper uses the ternary logic of discrete mathematics, which extends {0, 1} by “don't care” to {0, 1, -}. George Spencer-Brown's Indeterminicy is refuted by using three different methods: complete induction, Theorems 14 and 15 and the software XBOOLE. For the calculation of the Modulator, the only practical application of re-entry in “Laws of Form”, techniques from automata theory are used.

The paper reveals a mathematical error in George Spencer-Brown's genesis of the re-entry of “Laws of Form” and refutes the assumption of Indeterminicy. The analysis of the only practical application of re-entry presented by George Spencer-Brown shows that the functioning of this Modulator can only be described correctly with the sequential interpretation of re-entry.

The paper emphasizes the interdisciplinary potential of sociology and information technology and provides methods and tools of discrete mathematics for use in the analysis of the works of George Spencer-Brown and Niklas Luhmann.

Mega construction projects (MCPs), which play an important role in the economy, society and environment of a country, have developed rapidly in recent years. However, due to frequent social conflicts caused by the negative social impact of MCPs, social risk control has become a major challenge. Exploring the relationship between social risk factors and social risk from the perspective of risk evolution and identifying key factors contribute to social risk control; but few studies have paid enough attention to this. Therefore, this study aims to systematically analyze the impact of social risk factors on social risk based on a social risk evolution path.

This study proposed a social risk evolution path for MCPs explaining how social risk occurs and develops with the impact of social risk factors. To further analyze the impact quantitatively, a social risk analysis model combining structural equation model (SEM) with Bayesian network (BN) was developed. SEM was used to verify the relationship in the social risk evolution path. BN was applied to identify key social risk factors and predict the probabilities of social risk, quantitatively. The feasibility of the proposed model was verified by the case of water conservancy projects.

The results show that negative impact on residents’ living standards, public opinion advantage and emergency management ability were key social risk factors through sensitivity analysis. Then, scenario analysis simulated the risk probability results with the impact of different states of these key factors to obtain management strategies.

This study creatively proposes a social risk evolution path describing the dynamic interaction of the social risk and first applies the hybrid SEM–BN method in the social risk analysis for MCPs to explore effective risk control strategies. This study can facilitate the understanding of social risk from the perspective of risk evolution and provide decision-making support for the government coping with social risk in the implementation of MCPs.

Effective safety supervision plays a crucial role in ensuring safe production within coal mines. Conventional coal mine safety supervision (CMSS) in China has suffered from the problems of power-seeking, excessive resource consumption and poor timeliness. This paper aims to explore the Internet+ CMSS mode being emerged in China.

The evolution of CMSS systems underwent comprehensive scrutiny through a blend of qualitative and quantitative approaches. First, evolutionary game theory was used to analyze the necessity of incorporating Internet+ technology. Second, a system dynamics model of Internet+ CMSS was crafted, encompassing a system flow diagram and equations for various variables. The model was subsequently simulated by taking the W coal mine in Shanxi Province as a representative case study.

It was revealed that the expected safety profit from the Internet+ mode is 296.03% more than that from the conventional mode. The precise dissemination of law enforcement information was identified as a pivotal approach through which the Internet+ platform served as a conduit to foster synergistic collaboration among diverse elements within the system.

The outcomes of this study not only raise awareness about the potential of Internet+ technology in safety supervision but also establish a vital theoretical foundation for enhancing the efficacy of the Internet+ CMSS mode. The significance of these findings extends to fostering the wholesome and sustainable progress of the coal mining industry.

This research stands out as one of the limited studies that delve into the influence of Internet+ technology on CMSS. Building upon the pivotal approach identified, to the best of authors’ knowledge, a novel “multi-blind” working mechanism for Internet+ CMSS is introduced for the first time.

Over the past decades, Islamic finance has expanded its presence to many countries including post-Soviet region. The purpose of this paper is to empirically investigate this phenomenon in Kazakhstan by adopting qualitative sociological approach. The study also aims to provide vital information and propose recommendations for market participants to contribute to the development of Islamic finance industry in Kazakhstan.

Primary data were gathered using the qualitative method of in-depth expert interviews with nine Islamic finance professionals representing Islamic banks, ijarah companies, funds and development institutions in Kazakhstan who occupy senior positions (directors, managers, heads of departments, etc.). Furthermore, the primary data of interviews were analyzed and processed using another qualitative method of cognitive mapping, the essence of which is to graphically display the concepts that are most often used by informants.

The study has shown that first there is a demand for Islamic finance among Kazakh business and population. At the same time, Muslims are not the only consumers of Islamic financial services; therefore, it is affordability rather than religiosity that is an important criterion for choosing Islamic finance. Second, murabaha and ijarah are the two most popular Islamic financial products in Kazakhstan, while equity-based instruments are hardly ever used. Third, Kazakhstan government policy toward Islamic finance received controversial assessments of experts: the state support is declared, but specific actions required by the market participants are not taken. Fourth, key factors that significantly limit the development of the Islamic finance market in Kazakhstan include a shortage of supply, which, in turn, is strongly associated with the second factor – limited funding of local Islamic finance institutions, the absence of insurance (or guaranteeing) system of investment accounts of the local Islamic banks, insufficient economy of scale, lack of convenient service and weak marketing policy of the existing Islamic banks and, finally, lack of educational programs.

The study reveals the potential development of Islamic finance in Kazakhstan which is a rarely studied topic. The findings and recommendations of this study can be used by the regulators, market players and policymakers of Islamic finance industry in Kazakhstan, post-Soviet and other Islamic finance-oriented countries.

This study offers new insights on the future of Islamic finance in Kazakhstan: in long term, the development will be determined by new financial technologies – Islamic FinTech, but in short term – by Islamic windows (currently not allowed by Central Bank) that will help to significantly expand the audience, increase awareness and demand for Islamic finance among local businesses and public. The current study is original, important and up-to-date, as it uses an approach that sources primary data in the form of experts’ point of view instead of relying on literature or document analysis. It is not a mere theoretical study of the literature but an empirical investigation of the problem. Moreover, it seeks to contribute to the Islamic finance literature in the post-Soviet region, particularly from the experts’ perspective.

This paper aims to examine the choices made by the hotel industry about what to include, and who to be accountable to, in their sustainability reports; a process defined as materiality assessment.

The paper is based on the findings of semi-structured interviews with eight sustainability managers (from eight of the world’s 50 largest hotel groups) to explore their understanding of, and use of, materiality and any barriers to its uptake and eight industry sustainability experts to assess the general industry-wide application of materiality.

Sustainability managers from large hotel groups are evasive when disclosing their materiality criteria, their decision-making processes and how they aggregate stakeholder feedback; they limit their disclosure to the reporting process. Sustainability managers are disempowered, with limited resources, time, knowledge and skills to apply to materiality assessment. Experts confirm that hotel groups are unsystematic and opaque about their decision-making and how they control their materiality assessments.

Materiality assessment is concealed from the public and may be constructed around business imperatives with high managerial capture. The hospitality industry needs to improve its sustainability reporting by examining how it defines and applies materiality and by addressing the barriers identified, if it is to demonstrate an enduring commitment to sustainability and organisational legitimacy.

This study addresses the limited knowledge of how hotel groups undertake materiality assessments. It identifies gaps in the conception and application of materiality by pinpointing barriers to its uptake and recommending areas in need of further research.

The purpose of this paper is to investigate the returns to the investors and the state in private finance of road infrastructure. It uses an empirical case of the E4 Helsinki-Lahti road, which was built in 1995-1999 in Finland as the first real PPP-project.

The analysis adopts an approach based on cash flow modelling of the project and the analyses show how the cash flows are formed and divided between the various stakeholders. The pure cash flow based approach to compare the economics of PPP vs traditional procurement of road infrastructure projects produced results that pose challenges to the logic, and pros and cons of shadow toll PPPs.

The analysis shows that potential win-win situations are hard to find in shadow toll arrangements. This is largely due to the different discount rates used by investors and state. It is argued that the state does not include all the true costs in its appraisal of projects. Private investors, in principle and as a rule, price all of the relevant risks and uncertainties of which they are cognisant.

The paper presents an analytical cash flow model that can be applied a wider range of PPP projects than simply to shadow toll roads. The paper contributes to the discussion on the viability of PPPs in different contexts.