Optical characteristics of the earth's surface and atmosphere from the point of view of the remote sensing of natural resources: Review of the contemporary status of the problem

Widely used remote probing methods, and especially the multispectral method, for studying the earth from aerospace platforms necessitate the systematization and accumulation of data on the relationships between remote observations and measured parameters and characteristic properties and conditions of phenomena on the earth's surface. Data were presented on the optical characteristics of natural objects which arise during observations of these objects over a wide spectral interval which encompasses solar radiation reflected by the object as well as the object's inherent thermal radiation. The influence of the earth's atmosphere on remote measurements and several problems in simulation and calculation are discussed

Features of diagnosis and treatment of spleen abscesses.

The purpose of the study is to clarify the causes, features of clinical manifestations, to evaluate the results of diagnosis and surgical treatment of patients with sepleen abscesses. The article presents data on the results of diagnosis and treatment of 19 patients with spleen abscesses who were treated at the Surgery Department of the Dnipropetrovsk Regional Clinical Hospital named after I.I. Mechnikov, from 2006 to 2018. A comparative analysis of the etiological factors of spleen abscesses among a selected group of patients was carried out. It was established that among the causes of spleen abscesses according to our data were: bacterial endocarditis, purulent diseases of the pancreas, trauma, simple cysts, portal vein thrombosis. When analyzing the results of inoculation of the contents of abscesses, it was determined that E.Coli (26.3%), St. Epidermalis (21.1%), Ac.Baumani (10.5%) and P. Aeruginosa 21.1%) occur the most often. For the diagnosis of spleen abscesses, general clinical, biochemical, and hardware methods of investigation (computed tomography, ultrasound examination of the abdominal organs) were used. The treatment of spleen abscesses was complex and included conservative therapy and surgical methods. As a surgical treatment minimally invasive, laparoscopic, as well as open techniques were used. The main surgical method was percutaneous drainage with ultrasound monitoring (42.1%). Relapse of abscess with this treatment option in the remote period was detected in 1 (5.6%) patient. In 5 (26.3%) cases patients with spleen abscesses underwent laparotomy and splenectomy. Laparoscopy was performed in 2 (10.5%) patients with spleen abscesses, operations were completed by opening, debridement and drainage of the abscess cavity and abdominal cavity. Fatal cases were not observed in the treatment of spleen abscesses. The combination of conservative therapy (using etiotropic antibacterial therapy) and surgical treatment (a combination of minimally invasive and laparoscopic techniques) allowed to achieve good treatment results. The number of complications was 15.8%

Operando analysis of lithium profiles in Li-ion batteries using nuclear microanalysis

International audienceA wide variety of analytical methods are used for studying the behavior of lithium-ion batteries and particularly the lithium ion distribution in the electrodes. However, the development of in situ / operando techniques proved powerful to understand the mechanisms responsible for the lithium trapping and then the aging phenomenon. Herein, we report the design of an electrochemical cell to profile operando lithium concentration in LiFePO$_4$ electrodes using Ion Beam Analysis techniques. The specificity of the cell resides in its ability to not only provide qualitative information about the elements present but above all to measure quantitatively their content in the electrode at different states of charge of the battery. The nuclear methods give direct information about the degradation of the electrolyte and particularly reveal inhomogeneous distributions of lithium and fluorine along the entire thickness of the electrode. Higher concentrations of fluorine is detected near the electrode/electrolyte interface while a depletion of lithium is observed near the current collector at high states of charge