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A new species of Leptanilla Emery, L. sichuanensis sp. nov., is described based on the worker caste from Sichuan, China. This new species is highly similar to L. macauensis Leong, Yamane & Guénard, sharing a conspicuous and strong central clypeal protuberance and clypeal lobes, along with a microspine-like subpetiolar process. The following characteristics of L. sichuanensis sp. nov. serve to distinguish it from the species: anteromedial circular disc of clypeal protuberance does not present a pair of triangular extensions on its medial margin, and instead has a complete curve; head and antennal scape longer in comparison (CI 67–70, SI 63–66); inferolateral margin of antennal toruli stretched angularly. An illustrated identification key for the Chinese Leptanilla based on the worker caste is provided.

PurposeThe number of crisis incidents and their severity is rising along with the growing complexity of technology and society. There are enumerable incidents that can interrupt progress in construction projects. The crisis response phase puts the project organization's established normal communication systems and processes under enormous and additional pressure. The aim of this paper is to make a contribution to link and extend the knowledge of complexity theory on communication management in the context of the crisis response. This paper aims to propose and refine a conceptual framework for understanding the underlying pattern of communication behavior and decisions of human systems in response to a crisis and to investigate how to enhance the organization's adaptability and resilience in the event of a crisis.Design/methodology/approachThe paper reviews, proposes and refines a conceptual complexity‐informed framework for effective crisis response communication management.FindingsConventional crisis response communication models and management are grounded on the linear, command‐and‐control principles of "scientific management", that they are rather limited in describing flexible reactions to the changing circumstances and explaining the dynamic and complex crisis response situations. The paper breaks out of this mould to propose an alternative model for crisis response communication based on complexity theory.Practical implicationsThe conceptual model proposed in the paper suggests that while the behavior of these complex systems cannot be predicted all the parts nevertheless self‐organize, learn and adapt to their dynamically changing environment.Originality/valueIn terms of this proposed conceptual framework, a flexible and adaptive management approach for the construction project manager to communicate and respond quickly and effectively in the midst of a crisis is suggested.

Background:High prevalence of smartphone addiction among medical students may contribute to adverse physical and mental health outcomes.Aim:To estimate the prevalence of smartphone addiction, and explore the influencing factors and related mental health symptoms of smartphone addiction among Asian medical students.Design:Systematic review and meta-analysis.Methods:PubMed (MEDLINE), the Cochrane Central Register of Controlled Trials, and EMBASE were searched for relevant literature from the inception to September 10, 2021. Using Stata software 11.0, the meta-analysis of prevalence and the influencing factors of smartphone addiction were determined with 95% confidence intervals.Results:Nineteen articles, published between 2014 and 2019, were included, producing medical student studies from seven different Asian countries. The included studies were conducted in India ( n = 11) and Malaysia ( n = 3), with China, Saudi Arabia, Turkey, Nepal, and Iran each contributing one study. Among a total of 5,497 medical students, the participants included 3,214 females, of whom 2,181 were medical students with smartphone addiction. The prevalence of smartphone addiction among Asian medical students was 41.93% (95% CI [36.24%, 47.72%]). The influencing factors of smartphone addiction among medical students included gender, duration of smartphone use, smartphone function, and marital status. Ten studies (52.63%) explored related mental health symptoms of smartphone addiction among Asian medical students. Smartphone addiction was positively correlated with poor sleep quality ( r = .17–.31), stress ( r = .30–.40), anxiety, depression, neuroticism, and general health among Asian medical students.Conclusion:Smartphone addiction is highly prevalent among Asian medical students. Smartphone addiction may adversely affect mental health, resulting in sleep disturbance, stress, anxiety, depression, and neuroticism. It is necessary to take appropriate precautionary actions and interventions to prevent smartphone overuse among medical students.