The modified LTCBDE with a T-shaped incision of the cystic duct and FREDDY laser lithotripsy is a safe and effective means of managing gallstones concomitant with large or impacted CBD stones.
Given the central role of webcams in monitoring physical surroundings, it behooves the research community to understand the characteristics of webcams' distribution and their privacy/security implications. In this paper, we conduct the first systematic study on live webcams from both aggregation sites and individual webcams (webpages/IP hosts). We propose a series of efficient, automated techniques for detecting and fingerprinting live webcams. In particular, we leverage distributed algorithms to detect aggregation sites and generate webcam fingerprints by utilizing the Graphical User Interface (GUI) of the built-in web server of a device. Overall, we observe 0.85 million webpages from aggregation sites hosting live webcams and 2.2 million live webcams in the public IPv4 space. Our study reveals that aggregation sites have a typical long-tail distribution in hosting live streams (5.8% of sites contain 90.44% of live streaming contents), and 85.4% of aggregation websites scrape webcams from others. Further, we observe that (1) 277,239 webcams from aggregation sites and IP hosts (11.7%) directly expose live streams to the public, (2) aggregation sites expose 187,897 geolocation names and more detailed 23,083 longitude/latitude pairs of webcams, (3) the default usernames and passwords of 38,942 webcams are visible on aggregation sites in plaintext, and (4) 1,237 webcams are detected as having been compromised to conduct malicious behaviors.
In this paper, a composite photocatalyst is prepared by using waste clay bricks to adsorb nano-titanium dioxide (TiO2), and a decorative concrete surface layer is made by using it. Then, it is found that reclaimed clay sand (RCA) prepared by building waste clay bricks has poor workability, with a relative strength between 40% and 80%, but can meet the strength requirements of ordinary building mortar. Compared with RCA, natural sand (NS) has lower water absorption, coarser particles and higher hardness. The relative strength of the mortar prepared using NS is between 50% and 80%, which also meets the basic strength requirements of the mortar. In terms of photocatalytic effect, the decorative concrete surface layer prepared using the composite photocatalyst has a good photocatalytic effect and can effectively degrade nitrogen oxide (NO x ) in automobile exhaust. The decorative concrete surface layer made of NS has lower nitrogen oxide degradation efficiency than RCA. The photocatalytic concrete surface layer prepared using RCA loaded with nano-titanium dioxide has good photocatalytic durability.
There is a statistically significant correlation between the HLA-DRB1*03 allele and the occurrence of CHB in the Han Chinese population, and the HLA-DRB1*03 allele may be a susceptibility allele for this disease.
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