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The paper is devoted to presenting a systematic investigation on the mechanical model and nonlinear dynamic characteristics of spur gear system with and without input shaft crack.

Considering the backlash, load-distribution, time-varying meshing stiffness and sliding friction, the modelling of a 5DOF gear system is proposed. Likewise, stiffness and damping models under elastohydrodynamic lubrication are developed, and sliding friction between gear pair is also outlined. In particular, a cracked input shaft which affects the support stiffness is presented, and breathing crack in keyway is adopted. On this basis, the dynamic responses of a gear system with and without input shaft crack are examined using numerical method, and some classical response diagrams are given, illustrating the effect of the important parameters on the gear system.

Dynamic simulation demonstrates that there exist periodic, quasi-periodic and chaotic motions in the gear system, and rational speed of the gear pair has noteworthy effects on vibration characteristic. Besides, comparison between healthy and cracked condition of input shaft indicates that occurring of crack convert periodic motion to quasi-periodic or chaotic motion.

The results give an understanding of the operating conditions under which undesirable dynamic behavior occurs, and provide some useful information to design and diagnose such gear system with crack fault.

This chapter investigates the presence of a difference in the systemic risk level between Islamic and conventional banks in Bangladesh. The authors compare systemic resilience of three types of banks: fully fledged Islamic banks, purely conventional banks (CB), and CB with Islamic windows. The authors use the market-based systemic risk measures of marginal expected shortfall and systemic risk to identify which type is more vulnerable to a systemic event. The authors also use ΔCoVaR to identify which type contributes more to a systemic event. Using a sample of observations on 27 publicly traded banks operating over the 2005–2014 period, the authors find that CB is the least resilient sector to a systemic event, and is the one that has the highest contribution to systemic risk during crisis times.

This paper updates the literature regarding the performance of constrained US mutual funds by looking at the relative performance of Christian mutual funds, socially responsible funds and Islamic funds. This paper aims to rank the performance of religious and ethical investment funds.

This study uses monthly returns from 2005 to 2015 to perform traditional asset pricing models as well as data envelopment analysis to determine rank.

Islamic mutual funds outperform socially responsible funds, which then outperform Christian-based mutual funds; these results are also consistent during the latest 2007-2008 crisis period. The results are robust to different performance metrics and benchmarks. Moreover, this paper reports a significant amount of money “left on the table” by investing in constraint funds and disregarding the sin industry which shows an ethical dilemma for investors.

Investors who seek to invest morally/ethically can be informed of the cost of doing so. They can also compare portfolio with others that have similar holdings and constraints.

This paper not only includes Christian mutual funds in the research but also provides the performance of all constrained assets. It also compares religious funds with “SIN” industry, and thus quantifies the cost of “doing right.”

The purpose of this study is to update the investment literature by providing latest evidence of performance of Islamic mutual funds by using global sample mutual funds data to support with empirical facts.

This study analyzes the comparative performance of Islamic and conventional mutual funds by using capital asset pricing model, Fama & French’s three-factor model and Carhart’s four-factor model. Further, the study tested the coskenwness effect by using data envelopment analysis approach.

The authors find evidence that when size of the funds is controlled, Islamic investment underperform the conventional mutual funds in four out of six models. The size of underperformance varies from model to model: from 32 basis points in the Carhart’s four-factor model with the skewness factor to two basis points at the Fama and French’s three-factor model. Also the study finds that alpha(s) are only insignificant for conventional mutual funds when the skewness factor is included in the regression. While comparing the loading on Islamic mutual funds, results show that Islamic mutual funds are less risky than conventional mutual funds when they are controlled for skewness.

This study uses the different factor models of performance evolution which help in overcoming weakness of measuring the Islamic mutual funds’ performance.

Travel ban, restriction and health hazards are the results of disruptive shocks in the tourism industry leading to a significant negative impact on the tourism business. We investigated the COVID-19 induced different restrictions effects in Bangladesh through the synthesis of the literature evidence. Our study found the tourism industry is one of the hardest-hit service industries worldwide during the pandemic. The main purpose of this chapter is to discuss the impact of COVID-19 on the tourism and hospitality industry in Bangladesh. New post-epidemic potentials for sustainable tourism growth are outlined. The consequences of COVID-19 in global sustainable tourism are discussed using a qualitative technique based on emergent literature, the most recent tourism reports and content analysis in this chapter. This book chapter complements the literature inventory on COVID-19 by estimating and tracking the world economy's major effects, the impact on sustainable travel and tourism, the effects on nature wildlife tourism and (new) openings for further sustainable tourism. Finally, it analyses the nature and scope of COVID-19's effects on tourism, recovery and resolution in the post-pandemic tourism industry, as well as the suggestions for future growth of sustainable tourism.

This article examines the impact of population age structure on the real exchange rate. Data on a panel of 22 OECD (Organization of Economic Cooperation and Development) countries over 1980–2015 period are used to estimate the empirical model. Using fixed effect model the paper finds that different age cohorts have a significant influence on the real exchange rates in the sample countries. The results are mostly consistent with the theoretical framework discussed in the paper and also with the findings of previous studies in this area. These results have important policy implications given the fact that the population is ageing in almost all the OECD economies these days.

In recent years, Islamic banking (IB) has received a lot of scholarly interest, as seen by the substantial increase in publications on the subject worldwide. The increasing rate of publications on IB indicates that this subject has attracted a substantial amount of scholarly attention. It has also been a prioritized topic for many banking and financial scholars in Bangladesh. This paper aims to conduct a bibliometric analysis to assess the research on IB in Bangladesh.

The method used in this study is a bibliometric analysis of the sample literature collected in January 2022 from the SCOPUS database. The sample size of the study is 120 articles published between 1999 and 2021 which meet the specific selection criteria. To analyze the data, software such as Rstudio (Rshiny), Microsoft Excel and VOSviewer have been used. The analyses were performed in three broad categories: overall performance indicators, citation analysis and cross-dimensional keyword analysis, followed by a brief content analysis that identifies research streams.

This paper shows a notable increase in the number of publications between 2012 and 2021 with Alam M.K. being the highest contributor to this momentum publishing 12 articles. The findings also highlight the most contributing countries, organizations, publications, articles, sources and subjects. Out of 120 articles, this study has identified 14 research streams that have already been investigated by previous authors. The research streams include the growth of IB in Bangladesh; corporate social responsibility; Islamic human resource management; comparative study; customer satisfaction; development issues; efficiency of Islamic banks; green banking; Islami Bank Bangladesh Limited; IB industry; Islamic finance; Islamic microfinance; Shariah governance; and theoretical aspects of IB in Bangladesh. This study further identified future research agenda with specific research questions.

This research is limited to journal articles published in English in Scopus-indexed publications. Further research could include various databases, such as the Web of Science, and increase studied units. While this study focused only on bibliometric analysis and research streams, future studies may center on the systematic review of articles published on specific topics.

Although IB is a rising sector in the financial system of Bangladesh, to the best of the authors’ knowledge, this is the first bibliometric analysis of IB in Bangladesh. The 14 research streams identified in this study also uniquely provide 10 future research agendas with 39 specific research questions.

Design a novel optimal integrated control algorithm for the automotive electric steering system to improve the stability and adaptation of the system.

Simulation and calculation.

The output signals follow the reference signal with high accuracy.

The optimal integrated algorithm is established based on the combination of PID and SMC. The parameters of the PID controller are adjusted using a fuzzy algorithm. The optimal range of adjustment values is determined using a genetic algorithm.

This study aims to investigate whether a religious environment affects a firm capital structure.

The authors use data from Saudi Arabia with a highly Islamic religious environment. The authors use an extreme bounds analysis (EBA), which provides a reliable analysis of the determinants of capital structure and aids the process of selecting explanatory variables when there is model uncertainty.

The authors find that firms in such an Islamic environment are relatively less leveraged compared to firms in a non-Islamic environment. The authors also find that firms located in an Islamic environment have different determinants of capital structure than firms located in a non-Islamic environment. Specifically, the Islamic society creates decision makers who are more risk averse, thus leading to a preference for corporate financing using internal funds.

The results imply a potential challenge for growth-seeking firms located in religious Islamic societies.

This study is one of the first to examine the determinants of corporate capital structure in Saudi Arabia using EBA.