We develop a three‐dimensional concept of supervisor–subordinate guanxi. This concept includes affective attachment, personal‐life inclusion, and deference to supervisor. Based on this concept, we conducted three studies to develop and validate a three‐dimensional supervisor–subordinate guanxi measure and to examine its relationship with related constructs, such as leader–member exchange. Results from Study 1 and Study 2 provide evidence of convergent and discriminant validity of the scale, while Study 3 demonstrates the scale's incremental validity and replicates results from Study 2. Furthermore, in Study 3, we found that the three dimensions of supervisor–subordinate guanxi had different significant effects on commitment, turnover intention, and procedural justice, providing further evidence of criterion‐related validity. Overall, these empirical results provide support for our three‐dimensional model of supervisor–subordinate guanxi.

The year 2015 is the 25th annum of the international disaster and risk reduction proposed by the United Nations. Disaster risk reduction (DRR) has achieved significant progress worldwide. The goals of disaster risk reduction, climate change adaptation, and sustainable development have become the joint responsibility of all countries in their economic, societal, cultural, political, and ecological construction activities. In the past 25 years, UNISDR together with national governments, scientific community, NGOs, entrepreneur groups, media and various relevant regional organizations is gaining effective results in alleviating human being's casualties, property losses, and damages to resources and environment caused by natural hazards on the world and is earning a great reputation at every stratum of society as well. Nevertheless, data released by related UN organizations indicate that natural disaster and disaster risk are still on the rise globally. Some nations and regions are still extremely vulnerable to large-scale disasters, although significant progress has been made in DRR actions. Natural disaster risk reduction is still a long haul ahead. FoundationsThe global hot spots project jointly finished by the World Bank and Columbia University (the USA) is the first ever cartography of major natural disaster risks at the global scale (Dilley et al. 2005). The UNISDR Global Assessment Report on Disaster Risk Reduction (GAR) inspired this Atlas (UN-ISDR 2009, 2011 All faculties and students of BNU on the disaster risk science and the international experts who participated in the IHDP/Future Earth-Integrated Risk Governance and "111 Project", as well as all the personnel involved in these two projects, throughout ten years of preparation, planning, and action, were organized to compile this atlas, aiming to reflect the spatial patterns of the main natural disaster risk all around the world. This atlas provides scientific evidence for taking effective measures of world natural disaster risk reduction by demonstrating the spatial variation from the following three spatial scales for the main natural disaster risk on the world: the grid unit (1°× 1°, 0.75°× 0.75°, 0.5°× 0.5°, 0.25°× 0.25°, 0.1°× 0.1°or 1 km × 1 km), the comparable geographic unit (about 448,334 km 2 per unit), and the national or regional unit (245 nations and regions). International Scientific and Technological CooperationClose cooperation with worldwide scientific institutions lays the scientific foundation of this Atlas. Scientific BasisThe World Atlas of Natural Disaster Risk attempts to reveal the spatial pattern of the risks of natural disaster which are mainly caused by physical hazards in the world with multiple perspectives of natural environment, exposure, disaster loss, and disaster risk with the framework of Regional Disaster System Theory (Shi 1991(Shi , 1996(Shi , 2002(Shi , 2005(Shi , 2009. It emphasizes the spatial-temporal pattern of worldwide natural disasters from the perspective of individual disasters and integrated disasters, in...

In this article, we recall the United Nations’ 30-year journey in disaster risk reduction strategy and framework, review the latest progress and key scientific and technological questions related to the United Nations disaster risk reduction initiatives, and summarize the framework and contents of disaster risk science research. The object of disaster risk science research is the “disaster system” consisting of hazard, the geographical environment, and exposed units, with features of regionality, interconnectedness, coupling, and complexity. Environmental stability, hazard threat, and socioeconomic vulnerability together determine the way that disasters are formed, establish the spatial extent of disaster impact, and generate the scale of losses. In the formation of a disaster, a conducive environment is the prerequisite, a hazard is the necessary condition, and socioeconomic exposure is the sufficient condition. The geographical environment affects local hazard intensity and therefore can change the pattern of loss distribution. Regional multi-hazard, disaster chain, and disaster compound could induce complex impacts, amplifying or attenuating hazard intensity and changing the scope of affected areas. In the light of research progress, particularly in the context of China, we propose a three-layer disaster risk science disciplinary structure, which contains three pillars (disaster science, disaster technology, and disaster governance), nine core areas, and 27 research fields. Based on these elements, we discuss the frontiers in disaster risk science research.

Solar thermal fuels offer a closed cycle and a renewable energy storage strategy by harvesting photon energy within the chemical conformations of molecules and retrieving energy by an induced release of heat. However, the majority of reports are limited to the ultraviolet light storage, which potentially interferes with the surrounding environment and reduces the material lifetime. Here, we present a novel arylazopyrazole (AAP)containing dendrimer that not only addresses the hindrance of visible light storage for solar thermal fuels but also exhibits outstanding performances of abundant energy conversion and stable storage, which are attributed to the substantial absorbance in visible wavelengths of para-thiomethyl-substituted AAP groups and the stability of cis isomers, respectively. The energy density of the dendrimer fuel after efficiently harvesting blue light (405 nm) is as high as 0.14 MJ kg −1 (67 kJ mol −1 ), and the storage half-life of the fabricated dendrimer film can reach up to 12.9 days. Moreover, the heat release of the dendrimer film can be triggered by different stimuli (light and heat). The dendrimer film displays a 6.5 °C temperature difference between trans isomers and cis isomers during green light irradiation. Our work provides a fascinating avenue to fabricate visible light storage solar thermal fuels and unlocks the possibility of developing natural sunlight storage in the future.

Dendrimers are well-defined, highly branched macromolecules that have been widely applied in the fields of catalysis, sensing, and biomedicine. Here, we present a novel multifunctional photochromic dendrimer fabricated through grafting azobenzene units onto dendrimers, which not only enables controlled switching of adhesives and effective repair of coating scratches but also realizes high-performance solar energy storage and on-demand heat release. The switchable adhesives and healable coatings of azobenzene-containing dendrimers are attributed to the reversible solid-to-liquid transitions because trans-isomers and cis-isomers have different glass transition temperatures. The adhesion strengths increase significantly with the increase in dendrimer generations, wherein the adhesion strength of fifth-generation photochromic dendrimers (G5-Azo) can reach up to 1.62 MPa, five times higher than that of pristine azobenzenes. The solar energy storage and heat release of dendrimer solar thermal fuels, the isomers of which possess different chemical energies, can be also enhanced remarkably with the amplification of azobenzene groups on dendrimers. The storage energy density of G5-Azo can reach 59 W h kg −1 , which is much higher than that of pristine azobenzenes (36 W h kg −1 ). The G5-Azo fuels exhibit a 5.2 °C temperature difference between cis-isomers and trans-isomers. These findings provide a new perspective and tremendously attractive avenue for the fabrication of photoswitchable adhesives and coatings and solar thermal fuels with dendrimer structures.