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City wall is an important symbol of ancient Chinese cities with unique geographical and cultural characteristics. Thus, the preservation of this historic landmark is considered significantly important. However, numerous residential construction activities and changes in ecological environment have destructed a great portion of the city walls in recent years. This study looks into the preservation of the ancient city walls from the systematic perspective and in line with the actual characteristics of Longdong Region to provide guideline measures for the protection and restoration of such landmark. Cognition and preservation are adopted extensively to investigate the specific situation of and the factors that influence the ancient city walls in this region. Preservation strategies for the city walls, including the “Axis-Point” system, planning control, and authenticity readability, are presented. The ancient city walls in Longdong Region can be preserved by protecting the entire region, the city, and the main wall body. The systematic method and preservation strategies at the “macro perspective,” “medium perspective” and “micro perspective” levels can solve the preservation problems of the ancient city walls in Longdong Region effectively.

Principals’ leadership has become a subversive activity that is carried out strategically to challenge and disrupt the status quo and resist policies and practices that are counterproductive to their work. The purpose of this paper is to reveal subversive tactics principals use in pursuit of justice and equity in schools and identify challenges and risks associated with their subversive leadership practices. Power tactics were used as a conceptual framework to guide the analysis of subversive activities by school principals.

This qualitative study focuses on 18 elementary and secondary school principals from six district school boards in the Metro Vancouver area who participated in the semi-structured interviews on their practices that epitomize different tactics in response to increasing demand and accountability.

The power tactics identified in this study illuminate many of the dilemmas principals face in their work and demonstrate the various ways principals exercise their political acumen to “act strategically to determine which tactics to use, when, and with whom.” In exercising ethics of subversion and critique, participants are more likely to use soft, rational, and bi/multilateral rather than hard, non-rational, and unilateral power tactics. Such tendency reveals their concern about causing relational harm and shows their strategic avoidance of direct confrontation.

Considering the limitations on the sample size and the research context, more research is needed to examine to what extent subversive practices are exercised and how they play out in different contexts.

The study shows that leadership involves upholding morals and values, even if this means having to use subversive practices to ensure inclusive, equitable, and just outcomes.

The Qingcheng County, where the ancient city wall is located, has rich regional cultural heritage. This ancient city wall is an important symbol for exhibiting the regional historical culture of Qingcheng. However, urban expansionary construction activities, environment chaos, and other issues have led to the destruction of the main part of the Qingcheng Ancient City Wall. Previous strategies for historical and cultural heritage Preservation planning emphasize rigidity and disregard resilience in protecting cultural heritage and the environment. On the basis of an analysis of the built environment of the Qingcheng Ancient City Wall, this study gains insights into the three aspects, namely, land use, road traffic, and municipal and disaster prevention in frastructure of the old city proper where the ancient city wall is located. A planning strategy that integrates an ordered control of land development, highly efficient and compound road traffic, synergetic municipal administration, and sound disaster-preventing infrastructure is formed according to cognitive results.

This study aims to analyse the major geographical dimensions of the location strategies of multinational tourism firms.

Conceptually, this paper is situated at the intersection of two distinct and evolving bodies of research literature on the global geographies of the tourism industry and the production of economic globalization from a set of strategic locations. Empirically, principal component analysis is applied to explore the main geographical configurations within a location matrix of 102 tourism firms across 547 cities.

The results identify strong geographical organizing patterns in the location strategies of multinational tourism firms, above all articulated in countries/regions that themselves have large domestic and/or international tourism markets. However, there is also a global component in terms of firm/location composition, while the national/regional components are hybrid and porous in practice.

This study contributes to a new way of looking at a globalizing tourism sector. The findings can be used to reflect on possible wider implications for the tourism geographies literature and reveal some avenues for further research.

跨国旅游公司的地理位置和选址：全球化战略

本研究旨在分析跨国旅游企业区位战略的主要地理维度。

在理论研究层面, 本文基于两个截然不同和不断发展的研究交叉点: (1)全球经济地理中的旅游产业研究; (2)战略区位选择上的经济全球化研究。在实证研究层面, 本文将主成分分析法应用于547个城市的102家旅游企业的区位矩阵研究中。

研究结果显示, 跨国旅游企业的区位选择具有很强的地理规律, 这点在本身拥有庞大国内和/或国际旅游市场的国家/地区内尤为明显。此外, 跨国旅游企业/地点的区位组成也具有明显的全球属性, 在单个国家/区域内的表现则很多元化, 有很大的不同。

这项研究有助于以新的视角来看待全球化的旅游产业。本文的研究成果可以用来反思旅游地理文献可能存在的更广泛的意义, 并探讨进一步的研究可能。

La geografía y la localización de selección de las empresas multinacionales de turismo: estrategias Para la globalización

Este estudio tiene como objetivo analizar las principales dimensiones geográficas de las estrategias de localización de las empresas multinacionales de turismo.

Conceptualmente, este documento se sitúa en la intersección de dos bibliografías de investigación distintas y en evolución: (1) sobre las geografías globales de la industria del turismo y (2) sobre la producción de la globalización económica desde un conjunto de ubicaciones estratégicas. Empíricamente, el análisis de componentes principales se aplica para explorar las principales configuraciones geográficas dentro de una matriz de ubicación de 102 empresas de turismo en 547 ciudades.

Los resultados identifican fuertes ordenamientos geográficos en estas estrategias de ubicación, sobre todo articuladas en países/regiones que a su vez tienen grandes mercados turísticos nacionales y/o internacionales. Sin embargo, también hay un componente global en términos de composición empresa/ubicación, mientras que los componentes nacionales/regionales son en la práctica híbridos y porosos.

Este estudio contribuye a una nueva forma de ver un sector turístico en globalización. Los resultados se pueden utilizar para reflexionar sobre posibles implicaciones más amplias para la literatura sobre geografías turísticas y discutir algunas vías para futuras investigaciones.

The purpose of this paper is to examine the impact of media attention on corporate disaster relief.

The authors used a matched sample research design, which is considered more appropriate than a random sample design for studying events that have low-occurrence rates in general. For each donor firm in the Yushu earthquake, the authors matched the firm with a non-donor firm in the same industry and with a firm size of within ±30 percent of the total assets in the year prior to the year of the occurrence of the Yushu earthquake. Then, using the Baidu engine, which is the most popular Chinese search engine, the authors captured the online media attention to the donor firms and their disaster relief.

The authors found that media attention drove corporate disaster relief.

Although the authors highlighted the role of the media as an important stakeholder in influencing corporate disaster relief, the authors did not fully explore the media’s influence. Future research should delve more deeply into the impact of the tenor of media coverage on corporate disaster relief.

This study reveals that the media, a particularly powerful stakeholder, can be a corporate disaster relief driver in China.

The purpose of this paper is to study the stability analysis and optical solitary wave solutions of a (2 + 1)-dimensional nonlinear Schrödinger equation, which are derived from a multicomponent plasma with nonextensive distribution.

Based on the ansatz and sub-equation theories, the authors use a direct method to find stability analysis and optical solitary wave solutions of the (2 + 1)-dimensional equation.

By considering the ansatz method, the authors successfully construct the bright and dark soliton solutions of the equation. The sub-equation method is also extended to find its complexitons solutions. Moreover, the explicit power series solution is also derived with its convergence analysis. Finally, the influences of each parameter on these solutions are discussed via graphical analysis.

The dynamics of these solutions are analyzed to enrich the diversity of the dynamics of high-dimensional nonlinear Schrödinger equation type nonlinear wave fields.

With the increasingly collaborative nature of innovation and the expanding role of digital platforms on inter-firm collaboration, the purpose of this paper is to investigate the impacts of digital platforms on collaborative innovation capability (CIC) under conditions of two distinctive governance mechanisms. Furthermore, the competitive benefits of CIC at different levels of environmental uncertainty are examined to clarify the performance of collaborative innovation.

The research model is proposed based on dynamic capabilities theory, information technology (IT)-enabled organizational capability and governance mechanisms literature, and then validated by using partial least squares with data collected from 200 Chinese firms that engage in digital collaboration with their major channel distributors.

Empirical results show that the enabling effect of digital platforms capability on CIC is positively moderated by relational governance while negatively moderated by formal governance, and both governance mechanisms directly and positively influence CIC; the positive relationship between CIC and competitive performance is stronger for higher level of environmental uncertainty; and CIC is the key mediator converting digital platforms capability into competitive performance.

This study enriches the existing literatures in IT-innovation relationship by not only surfacing the interplay of digital platforms capability with two distinctive governance mechanisms in building CIC, but also clarifying the competitive benefits of CIC in an uncertain environment. Moreover, this study helps explain the controversial issue of the business value of IT capability by discovering the mediating role of CIC.

A robotic wheelchair system was designed to assist disabled people with disabilities to walk.

An anticipated sharing control strategy based on topological map is proposed in this paper, which is used to assist robotic wheelchairs to realize interactive navigation. Then, a robotic wheelchair navigation control system based on the brain-computer interface and topological map was designed and implemented.

In the field of robotic wheelchairs, the problems of poor use, narrow application range and low humanization are still not improved.

In the system, the topological map construction is not restricted by the environment structure, which helps to expand the scope of application; the shared control system can predict the users’ intention and replace the users’ decision to realize human-machine interactive navigation, which has higher security, robustness and comfort.

Drug repurposing involves the identification of new applications for existing drugs. Owing to the enormous rise in the costs of pharmaceutical R&D, several pharmaceutical companies are leveraging repurposing strategies. Parkinson's disease is the second most common neurodegenerative disorder worldwide, affecting approximately 1–2 percent of the human population older than 65 years. This study proposes a literature-based drug repurposing strategy in Parkinson's disease.

The literature-based drug repurposing strategy proposed herein combined natural language processing, network science and machine learning methods for analyzing unstructured text data and producing actional knowledge for drug repurposing. The approach comprised multiple computational components, including the extraction of biomedical entities and their relationships, knowledge graph construction, knowledge representation learning and machine learning-based prediction.

The proposed strategy was used to mine information pertaining to the mechanisms of disease treatment from known treatment relationships and predict drugs for repurposing against Parkinson's disease. The F1 score of the best-performing method was 0.97, indicating the effectiveness of the proposed approach. The study also presents experimental results obtained by combining the different components of the strategy.

The drug repurposing strategy proposed herein for Parkinson's disease is distinct from those existing in the literature in that the drug repurposing pipeline includes components of natural language processing, knowledge representation and machine learning for analyzing the scientific literature. The results of the study provide important and valuable information to researchers studying different aspects of Parkinson's disease.