Surface deformation relief (SDR) of the contact areas of a hip joint endoprosthesis subjected to wear was studied at different structural levels using laser scanning microscopy. Quantitative ...comparative 3D analysis of the SDR parameters characterizing postimplantation changes in components of the implant was performed. It was found that wear of the kinematic unit was eccentric and heterogeneous. Deep local surface changes were mainly observed at the upper pole of the head and the insert. The bottom segments of the insert remained intact even after long-term use of the tribological pair. The SDR of these segments remained intact.
The COVID-19 pandemic has a serious impact on surgical service, emergency and especially elective surgical care. Many hospitals were re-designated as COVID hospitals due to resource constraints and ...large number of COVID-19 patients requiring hospitalization. This led to cancellation or postponement of scheduled surgeries. In addition, restrictions in elective surgery were associated with the risk of infection in surgical patients. Various protocols and guidelines recommended non-surgical or outpatient treatment if possible. During the pandemic, postoperative morbidity and mortality in emergency surgery increased significantly. The same is true for elective surgeries in 7-8 weeks after previous coronavirus infection. The authors analyze the issues of organization, priorities for restoration of elective surgery and criteria for patient selection.
The 1-cubic km deep Baikal-GVD underwater Cherenkov detector, a new-generation neutrino telescope, is now being deployed in Lake Baikal. The telescope’s status is described and the first physical ...results from its operation are presented.
The status and perspectives of the feasibility study to detect high energy cosmic neutrinos acoustically in Lake Baikal is presented. The concept of on acoustic array as a part of the Baikal Gigaton ...Volume Neutrino Telescope GVD based on results of simulation and background measurements is described.
A corrected energy dependence of the depth of the maximum in the wide range of energies 10
15
to 10
18
eV is obtained using data collected at the Tunka-133 facility over 7 years of operation ...(2009–2017) and the TAIGA-HiSCORE facility in the 2019–2020 season. At the highest energies, our results match those of the Pierre Auger observatory. The results are converted to parameter ❬ln
A
❭, which characterizes the mean EAS composition.
The Tunka-Grande array is part of an experimental complex located in the Tunka Valley (Republic of Buryatia, Russia) about 50 km from Lake Baikal. This complex also contains the Tunka-133 and ...Tunka-Rex arrays. The aim of this complex is to study the primary cosmic ray energy spectrum and mass composition in the energy range of 10
16
–10
18
eV, and to search for diffuse gamma rays in the energy range of 5 × 10
16
–5 × 10
17
eV. The design of the Tunka-Grande array and the procedure for reconstructing the parameters of extensive air showers (EASes) are described, and preliminary results are presented from the search for diffuse gamma rays with energies of more than 5 × 10
16
eV.
Baikal-GVD: Results, status and plans Avrorin, A.D.; Avrorin, A.V.; Aynutdinov, V.M. ...
EPJ Web of Conferences,
01/2016, Letnik:
116
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
The future next-generation neutrino telescope Baikal-GVD will be a km3-scale array aimed at the detection of astrophysical neutrino fluxes. It will have modular structure and consist of functionally ...independent sub-arrays – clusters of strings of optical modules. The prototyping phase of the project has been concluded in 2015 with the deployment of the first cluster of Baikal-GVD in Lake Baikal. We discuss the current status and perspectives of the Baikal-GVD project.
Baikal-GVD is a cubic-kilometer scale neutrino telescope, which is currently under construction in Lake Baikal. GVD will consist of an array of optical modules arranged in clusters of strings. The ...first GVD-cluster has been deployed and put in operation in April 2015. We describe equipment and methods for the calibration of the first GVD-cluster and discuss the accuracy of the calibration procedures.
PDF
