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This review aims to give a critical view of the wheel/rail high frequency vibration-induced vibration fatigue in railway bogie.

Vibration fatigue of railway bogie arising from the wheel/rail high frequency vibration has become the main concern of railway operators. Previous reviews usually focused on the formation mechanism of wheel/rail high frequency vibration. This paper thus gives a critical review of the vibration fatigue of railway bogie owing to the short-pitch irregularities-induced high frequency vibration, including a brief introduction of short-pitch irregularities, associated high frequency vibration in railway bogie, typical vibration fatigue failure cases of railway bogie and methodologies used for the assessment of vibration fatigue and research gaps.

The results showed that the resulting excitation frequencies of short-pitch irregularity vary substantially due to different track types and formation mechanisms. The axle box-mounted components are much more vulnerable to vibration fatigue compared with other components. The wheel polygonal wear and rail corrugation-induced high frequency vibration is the main driving force of fatigue failure, and the fatigue crack usually initiates from the defect of the weld seam. Vibration spectrum for attachments of railway bogie defined in the standard underestimates the vibration level arising from the short-pitch irregularities. The current investigations on vibration fatigue mainly focus on the methods to improve the accuracy of fatigue damage assessment, and a systematical design method for vibration fatigue remains a huge gap to improve the survival probability when the rail vehicle is subjected to vibration fatigue.

The research can facilitate the development of a new methodology to improve the fatigue life of railway vehicles when subjected to wheel/rail high frequency vibration.

This study explores whether herd behavior exists for equity crowdfunding investors in China and whether this herding is rational.

Based on signaling theory and social learning theory, two hypotheses were proposed. This study employed two approaches to collect data. First, this paper analyzed 3,041 investments on an equity crowdfunding platform in China using Python programming and built a panel data model. Second, based on a unique experiment design, this study conducted several relevant herd behavior simulation experiments.

We found that investors in the Chinese equity crowdfunding market exhibit herd behavior and that this herding is rational. Project attributes play a negative role in moderating the relationship between the current investment amount and cumulative investments. Experimental results further support our findings.

This study contributes to the emerging literature on herding in crowdfunding by focusing on equity crowdfunding in China. We are the first to explore whether Chinese equity crowdfunding investors exhibit rational herding behavior. The study is also original in applying social learning theory to equity crowdfunding and in using both actual crowdfunding campaigns and experimental approaches to collect data. This study has valuable implications to practice.

This paper aims to tackle the challenge topic of continuum structural layout in the presence of random loads and to develop an efficient robust method.

An innovative robust topology optimization approach for continuum structures with random applied loads is reported. Simultaneous minimization of the expectation and the variance of the structural compliance is performed. Uncertain load vectors are dealt with by using additional uncertain pseudo random load vectors. The sensitivity information of the robust objective function is obtained approximately by using the Taylor expansion technique. The design problem is solved using bi-directional evolutionary structural optimization method with the derived sensitivity numbers.

The numerical examples show the significant topological changes of the robust solutions compared with the equivalent deterministic solutions.

A simple yet efficient robust topology optimization approach for continuum structures with random applied loads is developed. The computational time scales linearly with the number of applied loads with uncertainty, which is very efficient when compared with Monte Carlo-based optimization method.

Policies regarding international student enrollment represents diversified responses and attitudes on internationalization of higher education, which is associated not only to the internal reforms of the higher education system but also to the adjustment of government-institution relationships in larger contexts of economic development, and cultural and diplomatic strategies. The purpose of this paper is therefore to analyze the trend of the mainland China’s inbound international student mobility during the past decades in the broader context of the country’s diplomatic and domestic political circumstances.

By using a historical and holistic approach, this paper identifies four stages of the development of international education for inbound international students, and examines the underpinning ideologies or motives of the trend.

Findings of this research suggestthat different from the triumph of other Asian countries in international education, neo-liberalism has inserted a very limited impact to the development of international education of the mainland China, mainly at the micro level; the main motive of international education in China is to serve its domestic politics and diplomacy. A type of new nationalism is emerging in China’s recent global strategy.

This paper responds to the broader discussion of natioanlism vs internationalism by looking at the complex relationship between the state, international relations, and higher education institutions.

The National People’s Congress (NPC) of People’s Republic of China, the highest organ of state power, is popularly seen as a rubber-stamp entity. However, it has been substantially evolving its roles to accommodate the governance discourses within China’s political system over the decades. This study aims to explore the changes of governance discourse of the NPC within China’s political system through which to offer a thorough understanding of the NPC’s evolving substantial role in current China.

This study deploys a historical approach to explore the changes of governance discourse of the NPC that has seen a growing importance in China’s political agenda, as argued by this study.

The authors find that the NPC has been substantially evolving its role within China’s political system in which the Chinese Communist Party has created different governance discourses. Besides, the NPC and its Standing Committee have asserted its authority as a substantial actor within China’s political system. The NPC is no longer functioned as a rubber-stamp institution, though it is still popularized as a rubber stamp by many scholars.

This study is a historical elaboration on the development of NPC under three governance discourses. It might be, to some extent, relatively descriptive in nature.

This study, therefore, sheds some light on a revisit on the governance discourses in current China.

There is a distinct separation of price discovery from pricing power in China's sugar spot and futures markets. The purpose of this paper is to identify the reasons and provide plausible explanations for this stylized phenomenon. Therefore, the research may deepen the understandings of the operational mechanisms and internal efficiency of China's sugar spot and futures markets.

The authors analyze the historical spot and futures price time series from China's sugar spot market and China's Zhengzhou Commodity Exchange (CZCE) within a co‐integration framework.

It is found that China's sugar spot market has the pricing power, even though the futures market leads the spot market in price discovery. The phenomenon of observed separation of price discovery in spot market from pricing power in futures market may be caused by: irrational speculation in CZCE sugar futures market; oligopoly and local government politics; or the operational efficiency of the wholesale spot market, especially for its comparative advantages of information accessibility in the sugar producing areas. The results are compared with other empirical findings in many other commodities markets to obtain deeper understandings.

The paper uncovers and provides the earliest econometric evidence of the observed stylized phenomenon and also provides plausible explanations for this phenomenon.

Integrating tourism and sustainability in achieving an eco-friendlier industry, this chapter highlights current trends in sustainable tourism, both in hospitality and recreational activities. The chapter describes sustainable, tourism, hospitality, and recreation trends. The research analyzes the origin of these trends, the vast majority motivated by the aftermath of the pandemic.

Technological progress is a determining factor in the factors leading to economic and social well-being. Simultaneously, the development of a sustainable economy is based on the conservation of resources. In the energy sector, this fact can be corroborated with the reduction of energy consumption, thus increasing economic efficiency. On the one hand, improving energy efficiency contributes to increasing the quality of life, productivity, and, implicitly, the economy, but on the other hand, it leads to excess energy use – this behavioral change is known as rebound. The research estimates the rebound effect at the macroeconomic level for European countries in the period 2000–2019, referring the analysis to each country's gross domestic product (GDP) and energy consumption, as well as comparing the preaccession and postaccession periods of Romania in the EU space. The rebound effect is determined using multidimensional analysis methods, depending on the GDP of each country as well as the behavior of each in the use of energy resources in industry, agriculture, and services. Although the study results confirm the strong link between energy consumption and GDP at the level of each state, they did not show considerable changes between countries at the level of the two periods.

If building and nurturing a learning organization is not a random chance, the question of where organizations should start is patent. Because learning culture is one of the core components of learning organizations, it is wondered how individuals and organizations contribute to this phenomenon. Under an interactional perspective, the authors explore the cross-dynamics between learning resources, structure and support (organizational level), and self-directed learning (individual level).

The authors conducted qualitative and exploratory research in Spring 2021 in France. They used semi-structured interviews with HRMs and a Delphi panel as the main instruments. This dual approach brings a reflexive and complementary dialogue to the research question.

The results show that non-learning organizations took advantage of the Covid-19 period. They created a learning biotope and fostered learning dynamics. Although this biotope acted as a learning marketplace and lacked guidance, individuals interacted with this learning biotope. They took learning initiatives and developed their self-directed learning. This understanding argues for constant interaction and co-influence between organizations and individuals to build and nurture a learning culture.

There is little discussion on how individuals and organizations contribute to building and nurturing a learning culture from an interactional perspective. Furthermore, literature on learning organizations considers self-directedness as a whole, considering self-directed learning as a characteristic and a process sharpens thinking. On methodological concerns, the authors used a dual qualitative approach with interviews and Delphi for the first time in research on learning organizations.

While there is research that has explored how institutions have responded to various crises, these are usually locally or regionally situated. However, no event has impacted higher education globally like COVID-19 and it will certainly alter the way top administrators lead and how institutions move forward. Thus, this chapter will explore how to better understand how presidents and top administrators navigate the (inter)national geopolitics as they move the institution forward. In addition, clear and up-to-date communication has proven to be important in battling this crisis. Thus, how presidents at national universities have communicated with students, faculty, staff, and various off-campus communities members regarding COVID-19 and how they have achieved is important to explore. Our findings suggest that presidents and top administrators need to build support to help them navigate the political roadblocks they may encounter. Findings also suggest that communication is the main role they play as leaders on their campus. On/off-campus community members see the presidents as the face of the university and key communicator as relates to communicating what the institutions is doing and how they are addressing the crisis. This chapter helps in better understanding the roles presidents and top administrators play during a global crisis.