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Abstract Aim To investigate and analyse the current situation of clinical nurses' sense of organisational support, emotional intelligence and work engagement in different departments and their correlation, in order to provide guidance for enhancing the sense of organisational support, improving nurses' emotional intelligence and mobilising nurses' work engagement and to promote the development of nursing teams. Methods Clinical nurses from three hospitals in eastern and western China were selected by convenience sampling method from September to October 2023 and were surveyed using a general information questionnaire, organisational support questionnaire, emotional intelligence scale and work engagement scale. We investigated the correlation between nurses' sense of organisational support, emotional intelligence and work engagement in clinical units. Results The clinical nurses investigated in this study had moderate levels of perceived organisational support and emotional intelligence and high levels of work engagement. The total score of the nurses' sense of organisational support questionnaire was positively correlated with the total score of the emotional intelligence scale, the total score of the work engagement scale and the scores of all dimensions (all p

In recent years, studies have shown that among elderly comorbidities, the incidence of comorbidity between osteoporosis and cognitive impairment is increasing year by year, which is manifested as a high incidence of falls and an increased risk of fractures, which leads to disability, increased mortality, and serious harm to health and quality of life of patients with comorbidities also bring a heavy economic burden to the family and society, which has become a more difficult problem in the management of chronic diseases in the community. This article reviews the progress of the relationship between osteoporosis and cognitive impairment. The focus is on the co-morbidity mechanism, clinical risk factors and clinical features of co-morbidity between osteoporosis and cognitive impairment. It is found that osteoporosis is closely related to cognitive impairment and seriously endangers the health of the elderly. It is hoped that this article can provide ideas for exploring new risk factors for comorbidity of osteoporosis and cognitive impairment, and provide help for the effective prevention and management of patients with comorbidity of osteoporosis and cognitive impairment.

The microstructure, structure, and cracking behavior of Q235-A strip iron oxide skin were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), and a universal tensile testing machine. The results show that the composition of the iron oxide mainly consists of Fe3O4, Fe2O3, and Fe, together with small amount of FeO, the oxide layer has the same thickness all over, about 10 μm, the structure is dense, and the matrix is better connected. The tensile experiments show that with increasing strain, the increase in the number of cracks is at first slow, then fast, then slow again. When the strain reaches 0.05%, its iron oxide skin begins to crack; the number of cracks increases with increasing strain in the range 0.08% -0.10%. When the strain exceeds 0.10%, the crack number increases slowly, and when the strain exceeds 0.15%, the number of cracks stops grow.

C16H16F6N3P, monoclinic, P21/n, a = 8.6414(8) Å, b = 20.755(2) Å, c = 10.1157(8) Å, β = 104.686(9)°, V = 1755.0(3) Å3, Z = 4, Rgt(F) = 0.0547, wRref(F2) = 0.1496, T = 291(2) K.

With the rapid development of the tourist hotel, the hotel has many problems in the protection of employee rights and interests. To enhance the importance that hotel managers attach to the protection of em-ployee’s rights and interests, and strengthen the hotel employees’ consciousness in rights protection, this paper regards the China’s tourist hotel employees as research objects, discusses the problems and causes in the process of protecting the tourist hotel employee rights and interests, and proposes solutions with the basic idea of “dis-covering, analyzing and solving problems”.

C7H6N2S2, monoclinic, P21/n (no. 14), a = 10.123(1) Å, b = 13.861(2) Å, c = 11.728(1) Å, ( = 91.538(1)°, V = 1645.1 Å3, Z = 8, Rgt(F) = 0.0366, wRref(F2) = 0.1046, T = 296 K.

Aiming at effectively utilizing recycled coarse aggregate (RCA) in sustainable construction, it is necessary to study the internal damage evolution of steel fiber–reinforced recycled-aggregate concrete (SFRAC) under dynamic tensile loads and the reinforced mechanism of steel fiber. The influences of the steel fiber content, the recycled-aggregate replacement ratio, and the loading rate on the mechanical properties and dynamic damage of SFRAC were studied using the Brazilian disc splitting test and acoustic emission (AE) technology. Then, the mechanism of crack evolution was investigated by means of the parameter analysis method. The results indicate that the existence of RCA makes the mechanical properties of recycled-aggregate concrete worse than those of normal concrete and weakens the strain rate effect of splitting tensile strength, whereas this negative influence can effectively be improved by steel fiber. The preferable steel fiber contents obtained from the splitting tensile strength and peak displacement are 1.0% and 1.5%, and under these conditions, the SFRAC replaced by 30% RCA has a mechanical performance superior to that of normal concrete. It is also found that the damage degree and energy absorbing capacity of SFRAC can be identified by analyzing the ring and energy counts of the AE signal. Furthermore, the evolution of the crack pattern of SFRAC under dynamic axial tensile load is well reflected by the rise angle and average frequency. Increased steel fiber content and recycled-aggregate replacement ratio can change the failure mode to a complex tensile-shear mixed failure, and the shear crack gradually becomes the main crack with increasing loading rates. Practical Applications: The public environment crisis from the greenhouse effect led to a series of measures from all industries worldwide. The widespread use of concrete has brought with it serious environmental and energy-saving problems. The construction industry preliminarily attempts to replace natural aggregate by recycled aggregate obtained by crushing construction solid waste in green low-carbon buildings, which shows considerable carbon sequestration and emission reduction. However, recycled aggregate has poor mechanical properties such as low strength and high porosity. When participating in concrete configuration, this defect seriously affects the strength of the material and limits its wide application in construction engineering. For a component with strength requirements or special purposes, fiber can be adopted to improve the mechanical properties of recycled-aggregate concrete. This study examines the damage process of fiber-reinforced recycled-aggregate concrete with the microscopic method and proposes a satisfactory mix proportion. Naturally, these analysis methods require more time and effort than a basic macroscopic analysis. Moreover, proper research on the mechanism of damage evolution under dynamic loading is crucial. [ABSTRACT FROM AUTHOR]

The stability of the plugging zone has a great impact on lost circulation control and gas invasion prevention in fractured reservoirs. In this work, the concept of "cavitation‐induced shear failure" is put forward based on the analysis of the flow field characteristics, and the failure mechanism is discussed. The strength physical model of a fractured plugging zone is formed based on the analysis of the characteristic parameters of LCMs and the failure mechanism. And then the simulation experiments of cavitation‐induced shear failure, gas invasion prevention, pressure bearing, and tight plugging are carried out. The research shows that (1) the fractured plugging zone is a dense granular matter system, and the contact forces and quid bridge force are dominant in its internal; (2) the cavitation‐induced shear failure is one of the main failure modes of the plugging zone in a fractured gas reservoir, and the failure process includes three steps: gas diffusion‐dilution damage, confluence and carry damage, and displacement dislocation shear failure; (3) the strengthening model of the plugging zone, "rigid bridging+elastoplastic filling+lacing wire of fiber+film‐forming seal," is a better model, and experiments prove that it can form a tight pressure‐bearing plugging zone, preventing drill‐in fluid loss. The research results provide a theoretical and technical basis for the lost circulation control of fractured gas formations. [ABSTRACT FROM AUTHOR]