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Copyright of Uranium Geology is the property of Uranium Geology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Earth Sciences & Environment is the property of Journal of Earth Sciences & Environment and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The current frequent occurrence of extreme weather events and the rapid expansion of urban and rural construction since the reform and opening up have led to aggravation of the contradiction between human and disasters. Therefore, it is necessary to clarify the relationship between urban and rural construction space and natural disasters. Taking the urban and rural construction space and natural disasters in the Guangdong-Hong Kong-Macao Greater Bay Area as the research object, and the interaction between the expansion of urban and rural construction space and natural disasters in the Guangdong-Hong Kong-Macao Greater Bay Area was explored through the methods of comparative research and comprehensive induction. The research shows that the spatial expansion of urban and rural construction is closely related to natural disasters, and the mutual influence relationship is bidirectional. There are regional differences in the correlation between urban and rural construction space expansion and disaster evolution. The overlap between disasterprone areas and urban construction-intensive areas is more closely related. The evolution of geological disasters, rainstorm and flood disasters is highly correlated with the spatial expansion of urban and rural construction. The expansion of urban and rural construction space aggravates the possibility and danger of disasters. The natural disasters limit the development direction of urban and rural construction space. The cost of urban development is increased by natural disasters. High-intensity construction and layout of important facilities should avoid areas prone to disasters. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Nanjing Agricultural University / Nanjuing Nongye Daxue Xuebao is the property of Journal of Nanjing Agricultural University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The change of the coastline has an extremely important impact on the safety of the wharf and port, the ecological environment of the island and the development of coastal industries. Therefore, analyzing the temporal and spatial evolution characteristics of island coastlines and its driving factors is of great significance for government to strengthen coastal management, improve the environment quality of islands, and maintain sustainable development of islands. Research selected the Landsat satellite data of Zhuhai City in 7 years from 1986 to 2021, employed the MNDWI and manual visual interpretation to extract the coastal waterline of the island, and analyzes the changes in the length of the coastline and the area of the island in each time period. As a result, the research objects are divided into islands with slight coastline changes and islands with significant coastline changes. DSAS module and multi-source data are employed to explore the driving factors affecting the temporal and spatial changes of island coastlines. The conclusionsare as follows: 1) In the past 35 years, the coastline length of each island in Zhuhai City has changed significantly, and the change trend of each island area is different. 2) The island has undergone large-scale construction activities in the past 35 years, and the coastline has changed significantly. The LCI in each period is in the range of 1.1-2.2, and the ACI is in the range of 1.1-3.3; the island has a slight coastline change due to the development disadvantages and island protection policies determined by the natural conditions of the islands, the degree of island development is low, the coastline changes slightly, and the LCI and ACI in each period are within the range of 0.9-1.1. 3) Human activities are the direct driving factor affecting the change of the island coastline, and the specific manifestations are island-connecting projects, land reclamation, and construction of wharfs. The indirect drivers of shoreline change are macroscopically the development of islands as a key driver of Zhuhai's marine economy and the human activities brought about by industrial development that affect shoreline change. Microscopically, the related island has the potential to develop related industries or contains rare ecological populations that need to be protected, and the resulting construction projects such as reclamation, island linkage or urban planning policies affect the island's shoreline change. Research departs from the micro perspective of existing studies at the research scale and takes a medium to macro perspective by selecting 66 islands in Zhuhai to explore the commonalities and characteristics of shoreline changes in each island. In terms of analysis depth, study combined government planning documents at various stages of Zhuhai City to deeply explore the indirect impact of planning on shoreline changes, which was rarely discussed in existing studies. This research can provide more comprehensive data support and reference materials for Zhuhai and the GBA to formulate island development strategies, and has practical and academic value. [ABSTRACT FROM AUTHOR]

Surface water is an important water resource required for all living things on Earth and the basic resource for human production and living, having great value to mankind. Based on the GEE and ArcGIS platforms, this study uses the global annual surface water dataset from 1985 to 2020 as the main data source and analyzes the spatial and temporal evolution of surface water bodies in the Greater Bay Area (GBA) using the rate of water area change, the density of gridded water bodies, and the land use conversion matrix. We then investigate the relevant influencing factors driving the spatial and temporal evolution of surface water bodies with the assistance of the Geographic Detector. Based on the above findings, and combined with urban development policy and regional development orientation, the spatiotemporal evolution mechanism of surface water bodies in the GBA over the study period was analyzed from the perspective of urbanization development laws. This analysis is also the primary contribution of the study and is the key difference between this research and previous pure geography studies. The results indicate the following: 1) The area change rate of surface water bodies in the GBA shows the characteristics of "slow decline - accelerated decline - deceleration - steady increase;" therefore, the study period is divided into slow shrinkage(1985-2000), accelerated shrinkage(2000-2010), deceleration shrinkage (2010-2015), and steady growth(2015-2020) based on these stage characteristics; 2) The change in the permanent water body area in the GBA has the periodic characteristics of "small cycles of alternating increases and decreases," while the seasonal water bodies area show the change characteristics of "largely decreased first and then increased." The influence of the two types of water bodies on the changes in the total surface water body area shows the characteristics of "alternative domination" with 2010 as the time node; 3) Spatially, large changes in surface water bodies appear in the form of urban clusters. For example, regional urban agglomerations, such as Fo-Guang-Zhao, Shenzhen-Guan-Hui, and Zhu-Zhong-Jiang, show synchronous shrinking or growth in the evolution of water bodies. This is mainly due to urban agglomerations being caused by the transfer (including migration in and out) of land types, such as water bodies, urban construction land, and cultivated land at different periods of urbanization development; 4) From the perspective of the entire study period, natural factors had higher explanatory power for the spatial differentiation of surface water bodies in the GBA than social and economic factors. The explanatory power of annual precipitation and vegetation coverage factors reached 40% and 34%, respectively. There was a two-factor enhanced interaction relationship with multiple factors, among which the explanatory power of cultivated land density and population factors was 31% and 30%, respectively, and there was a non-linear enhanced interaction relationship with multiple factors; and 5) From the perspective of the urban development period, the degree of influence of natural, social, and economic factors on surface water bodies varies across different stages. Natural factors played a leading role in the temporal and spatial differentiation of surface water bodies during the early urbanization process. As urban development accelerated and entered a stable period, the influence of human activities on surface water bodies increased rapidly and became an important driving force for temporal and spatial differentiation. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objevtive: To explore the effect of percutaneous transforaminal endoscopic discectomy for the treatment of lumbar disc herniation. Methods: 77 patients with lumbar disc herniation treated in our hospital from January 2018 to March 2020 were selected as the research subjects. They were divided into two groups by random number table according to the order of admission. 39 patients in the control group were given open surgery: posterior lumbar discectomy, intervertebral fusion, pedicle screw internal fixation, and 38 patients in the study group were treated with percutaneous endoscopic. Compare the recovery of lumbar function after treatment between two groups of patients. Comparison of clinical indicators such as surgical time, intraoperative blood loss, length of hospital stay, and incision length between the two groups of patients. The levels of interleukin-1β (IL-1β) and C-reactive protein (CRP) were compared between the two groups of patients before and 1 day after surgery. Results: The total excellent rate of waist function recovery in the study group was 92.11 % (35/38), which was significantly higher than that of the control group. The total excellent rate of waist function recovery was 66.67 %(26/39) (P<0.05). Intraoperative blood loss, length of hospital stay, length of incision, and operation time were significantly less (shorter) in the study group than in the control group (P<0.05). Before surgery, there was no significant difference in the levels of IL-1β and CRP between the two groups of patients (P>0.05). One day after surgery, the levels of IL-1β and CRP in the two groups were significantly higher than before surgery, but the study group was significantly lower than the control group (P<0.05). Conclusions: Percutaneous intervertebral foramen is effective in treating lumbar intervertebral disc herniation. This method can effectively improve the clinical indicators of patients, and has less damage to patients. It is recommended to be widely used in clinical practice. [ABSTRACT FROM AUTHOR]