STABLE LEAD ISOTOPIC RATIOS IN SURFACE DEPOSITED SEDIMENT AS INDICATOR OF URBAN GEOCHEMICAL PROCESSESS

The objective of the study was to assess the isotopic ratios Pb-204/Pb-206, Pb-207/Pb-206, Pb-208/Pb-206 and analyze their availability to indicate contemporary geochemical pro-cesses in urban surface deposited sediments. The study was conducted on the example of five Russian cities.The reported study was funded by RFBR, project number 19-35-60011

The bladder cancer: the risk factors and prognostic markers

The bladder cancer: the risk factors and prognostic marker

Stable Lead Isotopic Ratios as Indicator of Urban Geochemical Processes

The study is aimed to apply the Pb isotope fingerprinting technique for tracing pollution of urban surface deposited sediment (USDS). USDS reflect changes in the geochemical conditions occurring in the environment. USDS samples were collected in residential areas with multistory buildings in Russian cities: Magnitogorsk, Nizhny Tagil, Tyumen, Ufa, and Chelyabinsk. Elements concentrations and stable Pb isotopic ratios were measured in the samples. The reconstruction of the initial geochemical baseline (IGB) relationship between potentially harmful element (PHE) Pb and conservative lithogenic element (CE) Fe was carried out for USDS sample populations in the cities. The IGB reconstruction divided USDS sample populations into the groups of 'polluted' and 'unpolluted' with Pb samples. Analysis of elements concentrations and Pb isotope ratios in the groups of USDS samples showed different trends in altering geochemical conditions for metals in the surveyed cities. The USDS is characterized by a decrease in the isotope ratios of 206Pb/204Pb and 208Pb/204Pb as a result of soil pollution by vehicles during the period of using leaded gasoline. © Published under licence by IOP Publishing Ltd.The reported study was funded by RFBR, project No 19-35-60011. Pb isotope analysis was carried out at the Geoanalyst Center for collective Use of the Ural Branch of the Russian Academy of Sciences. The work of Chervyakovskaya M. and Streletskaya M. was paid from the project No AAAA-A18-118053090045-8 of the State task of the IGG UB RAS

ASSESSMENT OF THE GEOCHEMICAL BACKGROUND AND POLLUTION OF SETTLEMENTS OF CITIES BASED ON THE STUDY OF MODERN ANTHROPOGENIC SEDIMENTS

The background concentration of elements were reconstructed for urban surface depos-ited sediments in 10 Russian cities. There reconstructed concentrations may be used in urban environmental pollution assessment.Работа выполнена при финансовой поддержке РФФИ (проект № 19-35-60011)

Superconducting parallel nanowire detector with photon number resolving functionality

We present a new photon number resolving detector (PNR), the Parallel Nanowire Detector (PND), which uses spatial multiplexing on a subwavelength scale to provide a single electrical output proportional to the photon number. The basic structure of the PND is the parallel connection of several NbN superconducting nanowires (100 nm-wide, few nm-thick), folded in a meander pattern. Electrical and optical equivalents of the device were developed in order to gain insight on its working principle. PNDs were fabricated on 3-4 nm thick NbN films grown on sapphire (substrate temperature TS=900C) or MgO (TS=400C) substrates by reactive magnetron sputtering in an Ar/N2 gas mixture. The device performance was characterized in terms of speed and sensitivity. The photoresponse shows a full width at half maximum (FWHM) as low as 660ps. PNDs showed counting performance at 80 MHz repetition rate. Building the histograms of the photoresponse peak, no multiplication noise buildup is observable and a one photon quantum efficiency can be estimated to be QE=3% (at 700 nm wavelength and 4.2 K temperature). The PND significantly outperforms existing PNR detectors in terms of simplicity, sensitivity, speed, and multiplication noise

Communicative competence of a cardiologist: ethical and psychological analysis

The article problematizes the issue behind the standard categories of psychosocial factors, informing a patient about disease, prognosis, treatment methods, etc. The issue of a doctor’s role in interaction with a patient. Although psychological research methods are actively used in cardiology practice, and their results are quite transparent and demonstrate the specifics of patients experiencing the disease, affective states, soping skills, there are still questions about a physician not as a biomedical expert, but as a helping specialist. And although deontological imperatives require quite clear personal qualities from a doctor, the very realization of these qualities should be based on psychological approaches and culturalpsychological categories. As such, the way a doctor interacts with a patient can be described in terms of virtue ethics, which is an integral category that describes personal characteristics. Such characteristics, being implemented directly in clinical communication, could become a universal “recipe” for meaningful cooperation

Relative luminosity measurement of the LHC with the ATLAS forward calorimeter

In this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.Comment: 16 page