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Robotic arms play a crucial role in various industrial operations, such as sorting, assembly, handling and spraying. However, traditional robotic arm control algorithms often struggle to adapt when faced with the challenge of dynamic obstacles. This paper aims to propose a dynamic obstacle avoidance method based on reinforcement learning to address real-time processing of dynamic obstacles.

This paper introduces an innovative method that introduces a feature extraction network that integrates gating mechanisms on the basis of traditional reinforcement learning algorithms. Additionally, an adaptive dynamic reward mechanism is designed to optimize the obstacle avoidance strategy.

Validation through the CoppeliaSim simulation environment and on-site testing has demonstrated the method's capability to effectively evade randomly moving obstacles, with a significant improvement in the convergence speed compared to traditional algorithms.

The proposed dynamic obstacle avoidance method based on Reinforcement Learning not only accomplishes the task of dynamic obstacle avoidance efficiently but also offers a distinct advantage in terms of convergence speed. This approach provides a novel solution to the obstacle avoidance methods for robotic arms.

Scholars have examined the relationship between sports and urban development and proposed to use sport programs and events as a catalyst to revitalize communities, upgrade urban infrastructure, promote city image, shift economic structure, nurture an active lifestyle, and enhance societal harmony and solidarity. Yet, previous studies were usually focused on mega sport events and were typically conceptual, theoretical and lack of practical applications. This study was designed to attain in-depth understanding on how a specific sport, table tennis, can be systematically organized and utilized to influence urban development through a qualitative research injury.

This investigation was carried by conducting in-depth interviews of the executive director of the Shanghai Table Tennis Association, on-site observations and comprehensive review of literature. Development of interview questions took into consideration the conceptual framework postulated by Preuss (2007) that contains six structures of urban development through sports. Triangulation analyses were conducted to cross validate the three information sources to generate themes and assertions.

While the identified practices were consistent with Preuss' (2007) framework, specific management activities earnestly practiced in Shanghai are centered on utilizing cultural and historical heritage, star power, branding strategies, staging tournaments, hallmark events, technical innovation and government relations to achieve the objectives of table tennis as a sport and the objectives of urban development through table tennis.

The findings of this study help fill the void that a theory usually cannot specify, namely, detailed, unambiguous practices. While table tennis may be a viewed as a small sport in many parts of the world, it has a strong, unprecedented historical heritage in Shanghai. This city has made a prudent choice and investment in this sport, which has proved to be effective. Other cities in the world should look into their own social, cultural and historical heritage and develop sport strategies, operations and programs accordingly.

This paper aims to examine the relationship between corporate COVID-19 disclosure (COVID_DISC) and stock price volatility (SPV) in Egypt.

The authors used the manual content analysis method to measure corporate COVID-19 disclosure in the narrative sections of annual reports. The authors use ordinary least squares (OLS) regression to examine the impact of corporate COVID-19 disclosure on stock price volatility using unique data from Egyptian-listed firms during COVID-19 pandemic over the period of 2020 to 2022. Propensity score matching method was adopted to mitigate the potential endogeneity issue.

This study reveals that corporate COVID-19 disclosure has a significant negative impact on stock price volatility, suggesting COVID-19 disclosure reduces stock price volatility. In addition, the results confirm that COVID-19 disclosure offers value relevant information to investors, which is consistent with the Egyptian Financial Supervisory Authority’s (EFSA) motivation in calling for more information on COVID-19 pandemic.

The findings of this study can help corporate managers and EFSA in enhancing corporate disclosure and transparency during future financial crises. Moreover, the findings offer valuable insights to investors, helping them gain a better understanding of the business environment during COVID-19 crisis.

To the best of the authors’ knowledge, this is the first Egyptian empirical evidence that examines the relationship between corporate COVID-19 disclosure and stock price volatility.

To achieve sustainable development objectives, managers are encouraged to implement best practices in corporate social and environmental responsibility within their establishments. The main objective of this chapter is to assess the quality of environmental, social, and governance (ESG) communication for Moroccan financial institutions. This chapter is devoted to the content analysis of the annual reports of 14 financial institutions listed in Morocco regarding ESG strategies between 2017 and 2021. The reference assessment tool we used is the Global Reporting Initiative (GRI) standards (2016), based on six principles. Each principle contains requirements and guidance on how to apply it. These principles are summarized in the following: Accuracy, Balance, Clarity, Comparability, Reliability, and Timeliness. The sample is composed of 14 financial institutions listed on the Casablanca Stock Exchange. After checking the content of the annual reports of listed Moroccan financial institutions, we detected several shortcomings in Corporate Social Responsibility (CSR) reporting behavior. Companies avoid disclosing information about negative events and performance. We saw this as a bad sign for stakeholders. The results showed a significant gap between the GRI standards and the content of the annual reports. These weaknesses mainly concern accuracy, comparability, and, timeliness, hence the need to carry out corrective measures to improve the quality of ESG practices within Moroccan financial institutions. One of the limitations of this research is its focus on financial institutions. However, it is possible to broaden the scope of the research by assessing the quality of ESG communication for nonfinancial companies.

This paper aims to study the following two questions. Do earnings announcements stimulate investors to participate in online discussions? Does online investment forum participation affect the market’s reaction to earnings news?

The authors collect all the online posts, which were related to the internet service companies and posted in a Chinese financial forum, guba.eastmoney.com (Guba), during the period between June 30, 2008 and December 31, 2015. Multiple linear regression analysis is used to test the questions.

The study finds that the earnings announcements induce online discussion. In addition, before the earnings announcement, online posting activity does not affect earnings response coefficient but can weaken the positive association between the magnitude of the upcoming earnings surprise and abnormal trading volume. In contrast, after the earnings announcement, online forum participation can facilitate the incorporation of earnings surprise into the price.

This study contributes to the literature studying the impact of social media on market reaction to earnings news by providing evidence that the price discovery process can be affected by the online investment forum. Several policy implications are also provided.

The poor corrosion resistance of the ferrite-pearlite steel limits its application in marine engineering because of the enhanced galvanic effect caused by continuously accumulated cementite. Cr as one principal alloying element is commonly used to improve the corrosion resistance of steels. This paper aims to study the effect of Cr on corrosion behaviors of ferrite-pearlite steels in an acidic environment.

The tested steels were immersed in a simulated solution of 10 Wt.% NaCl with pH 0.85 for 72 h to evaluate the corrosion rate. After the immersion test, the corrosion morphologies and products were tested by scanning electron microscopy, energy dispersive X-ray analysis and X-ray diffraction. Meanwhile, an electrochemical workstation was used to study the electrochemical behaviors of samples.

At the initial corrosion stage, the corrosion rate increased in the sequence of Cr₀, Cr_0.5 and Cr₁ steels, which was because of the competitive effect between the area ratio and the driving force caused by alloyed Cr. However, Cr₁ steel exhibited the best corrosion resistance after a 72-h immersion test. This was because the alloyed Cr promoted the formation of protective Fe₂O₃ and FeCr₂O₄, which suppressed the preferential dissolution of ferrite and, thus, reduced the accumulation rate of carbides, resulting in the weakened galvanic corrosion.

This paper reports the role that Cr plays in the galvanic corrosion of ferrite-pearlite steels, which is important for the engineering application of ferrite-pearlite steels in marine environment.

The objective of this paper is to synthesize and extend the existing understanding of social health accounting (SHA) literature within the perspectives of social health disclosures (SHAD) and the effect of social health problems on public and private sector accounting.

This study provides a comprehensive and up-to-date systematic literature review (SLR) of past studies on social health within the accounting literature. This is done by employing a three-step SLR research design to investigate a sample of papers, made up of 62 mixed, qualitative and quantitative studies conducted in over 23 countries, drawn predominantly from the extant accounting literature from 2013 to 2023 and published in 25 peer-reviewed journals.

Our SLR offers several findings. First, we find that existing SHA studies apply theories in SHAD studies, but hardly apply them to explain the impact of health problems on business outcomes. Second, we show that the extant studies have focused predominantly on rigorous empirical studies on SHAD, while this is scarce for studies examining the impact of diseases/health problems on both public and private sector accounting. Third, we identify several research design weaknesses, including a lack of primary data analysis, mixed-methods approach and rigorous qualitative studies. Finally, we present directions for future SHA research.

In contrast to the ever-increasing general social and environmental accounting (SEA) research, existing studies examining global health issues and challenges (e.g. diseases, epidemics and pandemics), especially from an accounting perspective are rare. Nonetheless, the past decade has witnessed a steady increase in research on corporate accounting for, and reporting of, health issues; although the emerging literature remains fragmented thereby impeding the generation of useful empirical and theoretical insights for policymakers, practitioners and researchers. Consequently, this paper offers extensive and timely SLR of the existing studies on SHA; critically reviewing past findings published in a wide range of peer-reviewed international journals that discuss the current state of global SHA research, their weaknesses and set future research agenda.

The aim of this study was to investigate the impact of the transactive memory system (TMS) on green innovation and examine the mediation role of the social network at all hierarchical levels.

Three hypotheses were examined by performing regression analyses on survey data from manufacturing firms in China. Especially, the nested sets of data from 389 individual observations nested in 53 work teams, including individual level and collective level have been investigated.

The study results show that the TMS has a positive effect on green innovation. Furthermore, the results indicate that at the team level, structure holes' mediation in this relationship is stronger than degree centrality; at the individual level, weak ties mediation in the relationship of specialization and green innovation is stronger than strong ties, conversely, strong ties mediation in the relationship of credibility and green innovation is stronger than weak ties.

This study expands previous research by highlighting the significance of multilevel social network elements in the context of the TMS and sustainable development and enriches the present research on green innovation.

Low-alloy structural steels (LASS) face severe microbiologically influenced corrosion (MIC) in their service environments. To mitigate this issue, Cu is often used as an alloying element owing to its intrinsic antimicrobial activity. However, the antibacterial performance and biofilm resistance of Cu-containing LASS (Cu-LASS) are still unclear. This study aims to analyze the effect of Cu addition to 420 MP LASS on its MIC by the Pseudomonas aeruginosa biofilm.

Scanning electron microscope, confocal laser scanning microscope and X-ray photoelectron spectroscopy were used to analyze the surface morphology and composition of corrosion products. The antibacterial activities of Cu-LASS were analyzed by the spread-plate method. In addition, electrochemical analysis was conducted to characterize the corrosion behavior of the produced alloy.

Bacterial analysis and morphological observation confirmed a reduced sessile cell count and inactivation of the P. aeruginosa biofilm on the surface of Cu-LASS coupons. Electrochemical measurements showed that Cu-LASS exhibited large polarization and charge-transfer resistances, which indicated excellent MIC resistance. This significantly enhanced resistance to MIC could be explained by the synergistic effect of released Cu²⁺ from the Cu-LASS surface and immediate contact to Cu-rich phase in the surface and the release of Cu²⁺ ions from the Cu-LASS surface.

The effect of Cu addition on the MIC resistance and antibacterial performance of LASS is seldom reported. It is necessary to investigate the corrosion resistance of Cu-LASS and clarify its antibacterial mechanism. This paper fulfills this need.

This paper aims to examine the direct and indirect effects of advertising on investor behavior.

The authors use a novel and direct measure of investor attention: the number of investors whose watch lists has the stock.

The authors find that beyond its direct effect through information dissemination, advertising has an indirect effect with regard to grabbing investor attention and the trading response. The authors further find that an increase in attention induces a positive influence on the impact of advertising on investor behavior.

First, it complements studies of home bias, in which investors are more likely to buy familiar stocks. Second, it also complements the literature on advertising and investor attention and on attention and capital markets. Third, with a new and unambiguous measure of investor attention. Fourth, combining the direct and indirect aspects, this study presents a detailed description of the financial market effect of advertising.