Search

Faced with rapid changes in the external environment, the operation of physical bookstores is facing crises. Metaverse is the product of virtual reality integration and it provides a new idea for the transformation and upgrading of bookstores. Based on the analysis of the current situation of bookstore operation, this paper proposes to build the new scenario, a Metaverse bookstore, from the perspective theory of media scene. The concept of establishing a Metaverse bookstore in this paper explores the dynamics between individuals, individuals and their surroundings, as well as individuals and objects. The Metaverse bookstore is in line with the trend of people's experience consumption and visual consumption. The immersive reading experience brought by Metaverse technology enables the bookstore to transcend time and space boundaries and meet the needs of users for personalized reading scenes. In the final part of the paper, the development strategy is proposed to provide a reference for future application research on Metaverse Bookstore. [ABSTRACT FROM AUTHOR]

Mindfulness training has shown beneficial effects on cognitive functions in older adults. However, the studies on this topic have used different methods and populations, and their results were inconsistent No systematic review has synthesized and evaluated these findings. This review aims to address this gap by categorizing the studies based on the training methods and cohorts of older adults, and summarizing the effects of mindfulness training on cognitive function. The review finds that mindfulness training had different effects depending on the level of cognitive decline and the training method. Both standardized and unstandardized training methods improved cognitive performance in older adults with normal or subjective cognitive decline. However, the effect of mindfulness training diminished as cognitive decline worsened, being inconsistent in mild cognitive impairment and non-significant in dementia. The review also discusses the possible mechanisms and suggested directions for future research. [ABSTRACT FROM AUTHOR]

Objective The study aimed to compare the diagnostic efficacy of QuantiFERON-TB Gold （QFT-TB） detection of specific cellular immune IGRAs in tuberculosis diagnostic laboratory for pulmonary tuberculosis, extrapulmonary tuberculosis and special population samples in vitro, which may provide evidence for clinical diagnosis and treatment. Methods A total of 546 patients with tuberculosis （AFB + 146 cases, AFB-247 cases）, 117 patients with molecular biology positive tuberculosis（ Xpert 69 cases, TB-DNA 48 cases） and 36 patients with histopathological positive were collected from January to July 2023. There were 72 cases of extrapulmonary tuberculosis, 276 cases of pleural effusion and 25 cases of ascites. QFT-TB method was used for detection, chi-square test was applied for comparison between groups, and the methodological evaluation of positive rate and coincidence rate were all compared. Results The positive rates of QFT-TB in pulmonary tuberculosis, extrapulmonary tuberculosis and close contacts were 83.69 %, 69.44 %, and 32.41 %, respectively. The coincidence rates of QFT-TB in AFB +, GeneXpert, TB-DNA and pathological confirmed tuberculosis patients were 91.09%, 88.40%, 81.25%, and 72.22%, respectively. The positive rate of pleural effusion in patients with tuberculous pleurisy was 60.50 %, and the uncertainty rate was 29.71%. The positive rate of ascites was 44.00 % and the uncertainty was 36.00%. Conclusion QFT-TB test has good value in the auxiliary diagnosis of pulmonary tuberculosis, and has certain reference significance for the diagnosis of extrapulmonary tuberculosis based on the detection of pleural fluids and ascites. [ABSTRACT FROM AUTHOR]

Pervious concrete was prepared with two industrial solid wastes of granulated blast-furnace slag and Bayer red mud as cementitious materials, sodium silicate solution as alkali activator, and limestone gravel as coarse aggregate. The effects of design porosity, water-binder ratio and aggregate size on the strength and permeability of pervious concrete were studied respectively. The optimal water-binder ratio is influenced by the design porosity and aggregate size. When the design porosity of pervious concrete is 15% and the aggregate size is 4.75-9.50 mm, the optimal water-binder ratio of 0.36 and it has a higher strength and has good water permeability. The mechanics and permeability performance of alkali-activated slag-red mud pervious concrete are better than those of cement pervious concrete, which is in line with the development concept of low carbon and green. [ABSTRACT FROM AUTHOR]

Objectives: The seasonal subsidence and uplift of the surface elevation in permafrost area occur due to the annual melting and freezing of active layer, which has an important impact on the safety of engineering construction, the balance of ecological environment, and global climate change. Using global navigation satellite system-interferometric reflectometry (GNSS-IR) to monitor frozen soil deformation is a new technique. Aiming at the terrain influence caused by the non-daily-repeatable orbits of GLONASS and Galileo satellites, this paper proposes a new method to calculate the freeze-thaw deformation of permafrost using these GNSS data. Methods: By introducing the inclination angle of reflector surface, the effects of terrain changes are eliminated, and the seasonal freeze-thaw deformation closer to the actual situation is obtained. The GNSS signal-to-noise ratio data of 2018 and 2019 snow-free days at SG27 site in northern Alaska are used for experiments and compared with the results obtained by existing retrieval methods to verify the effectiveness of this method in monitoring permafrost deformation. Results: The results show that compared with the methods without considering the terrain effect, the surface elevation changes obtained by GLONASS and Galileo have smaller discreteness and smaller uncertainty, and the fitting consistency and determination coefficient R2 of the composite model have been improved. The total average standard deviations are reduced by about 28.9 % and 36.9 %, and the total average R2 are increased by about 0.23 and 0.24, respectively. The total average increases of daily data utilization rate of non-repetitive orbits are about 19.6 % and 22.8 % . Conclusions: This study provides a valuable reference for monitoring permafrost freeze-thaw deformation, and expands the application of GNSS-IR in GNSS system for permafrost freeze-thaw monitoring. [ABSTRACT FROM AUTHOR]