Electromagnetic properties of LaCa[3]Fe[5]O[12] in the microwave range

The X-ray diffraction analysis of the LaCa[3]Fe[5]O[12] ferrite (lanthanum ferrite) prepared through high-temperature synthesis via ceramic technology was performed. It was found that ferrites belong to tetragonal system. The electromagnetic response from a flat layer of the composite based on this material under electromagnetic radiation in the frequency range of 0.01-18 GHz was investigated. It is shown that the developed material effectively interacts with electromagnetic radiation. The interaction effectiveness is directly proportional to ferrite concentration. Increased concentration of ferrite leads to growth of the reflection coefficient due to high conductivity of the material and visible decrease in the transmission coefficient in the frequency range of 4-14 GHz

Monitoring of illegal placement of solid waste with the use of space technology

© 2016, International Journal of Pharmacy and Technology. All rights reserved.This article is devoted to development and use of the space and geoinformational technologies allowing the state and municipal operating controls to carry out continuous monitoring of city and suburban territories regarding identification of unauthorized garbage dumps, to carry out control of their elimination. The purpose of the conducted research is definition of optimum ways with minimum expenses of labor and life capabilities to carry out searching of unauthorized garbage dumps and to provide monitoring for clear and rather in settlements. Object of a research is the modern territory of Kazan and its vicinities, with a total area more than 600 sq.km, numbering inhabitants more than 1,2 million human. In work traditional geographical methods were used: cartographical, based on methodological bases of thematic and complex mapping, on achievements in the field of geoinformational technologies, comparative and descriptive, a method of the space analysis, statistical. As a result of the conducted research the technique of probability assessment of placement of municipal solid waste with use of space and geoinformational technologies which will allow to make well-timed administrative decisions is developed and introduction of expressly developed hardware and software system on monitoring and holding the actions directed to elimination of unauthorized locations of municipal solid waste is offered

Application of GIS in interpretation of the results of multistage hydraulic fracturing monitoring by surface microseismic method

Currently, the problem of interpretation of microseismic monitoring data is a critical task. Along with the improvement of field survey technologies and data processing, as well as with the development of realtime hydraulic fracturing monitoring by microseismic methods there are several problems to solve, such as objectivity of geological data, the data reference with the local and regional stress-strain state of the rock massif. The aim of this work is the post-processing of surface microseismic monitoring results with the use of geographic information systems. An analytical basis of data processing is spatial statistics set of tools of ArcGIS ESRI software, which is traditionally used to identify the patterns in the spatial distribution of any point events containing georeference component. The paper shows an approach to process an interpretation in complex situations, such as fracking pump failure, when the cloud of microseismic events shows a random distribution. Main attention in the work was paid for geological interpretation of the results obtained and their relation with the results of regional stress-strain state investigation. Significant convergence is detected for the orientation of natural fractures defined by surface seismic surveys, microseismic monitoring of hydraulic fracture propagation and regional lineament analysis basing on satellite images

Analysis of environment state in technogenic region and its threat to public health.

The purpose of the research is to give a complex hygienic evaluation of environment state in Donetsk region and to determine the degree of their potential danger to population health. It includes air pollution, water contamination, state of soil. Nearly 43000 samples of air, 32000 drinking water samples and 4500 soil samples were analyzed. Regions with the highest rate of environmental pollution were defined. It was found that the main sources of environment pollution in Donetsk region are ferrous and nonferrous metallurgy enterprises, power, coal, building industry and transport. All other sources ac­count for only 5-10% of total emissions. Level of harmful technogenic pressing on population’s health was determined

Horizon-T Experiment Detailed Calibration of Cables

The ability to extract the pulse width and translate it into the actual disk width of the Extensive Air Showers (EAS) is a hard one requiring accurate knowledge of the system performance. For that, the analysis for the cable calibration for Horizon-10T detectors has been re-analyzed in a different form that allows for better signal width measurements. An innovative detector system Horizon-10T, constructed to study EAS in the energy range above 1016 eV coming from a wide range of zenith angles (0o - 85o), is located at Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above the sea level.Comment: in-depth analysis of cable calibration for 'new' cables only v2 corrects minor typo

Nanofibrous Carbon (Multi-Wall Carbon Nanotubes): Synthesis and Electrochemical Studies by Using Field-Effect Transistor Setup

Received: 30.08.2024. Revised: 21.11.2024. Accepted: 28.11.2024. Available online: 05.12.2024.An effective method for the preparation of nanofibrous carbon (multi-wall carbon nanotubes, MWCNTs) is reported; the structure of the obtained MWCNTs was confirmed by means of physical methods.According to the SEM data, the diameter of the nanotubes is 20–85 nm and the length is 500–600 nm.By using the obtained MWCNTs, the samples of field-effect transistors were created, and charge carrier mobility as high as 0.008 cm2 V–1 s–1 was observed.Synthesis of nanofibrous carbon (multi-wall carbon nanotubes, MWCNTs) by means of n-hexane pyrolysis is reported. The structure of the obtained MWCNTs was studied using scanning electron microscopy, and the diameters of 20–85 nm and lengths of 500–600 nm for these nanotubes were observed. By using the above mentioned MWCNTs field-effect transistors were fabricated on ITO glass substrates with a gate dielectric made of 390 nm thick Al2O3 foil and the drain-source contacts made of 300 nm thick aluminum foil. The Nano-C film 200 nm thick was deposited by thermal evaporation in vacuum. The properties of the obtained field-effect transistors were studied. The current-voltage characteristics of the OFET show an increase in currents with a positive voltage on the gate, which corresponds to the electron conductivity of the transport channel. The dependences are nonlinear, and there are no saturation regions in the output characteristics. The Raman spectra indicate the presence of nickel and show characteristic peaks for C=C and CH bonds.The authors are thankful to Professor of the RAS Grigory V. Zyryanov (UrFU) for the valuable comments on the manuscript

Differential diagnosis of breast tumors on the basis of radiothermometric findings

The paper presents a method for the differential diagnosis of breast tumors in accordance with radiothermometric findings, which is based on the authors’ developed diagnostic technique (Patent No. 2532372 dated 5 September 2014). The radiometric method was used to examine 119 patients with malignant breast tumors, 53 patients with benign breast tumors, and 60 women without breast involvement. The data were obtained in 3 institutions: the Russian Medical Academy of Postgraduate Education, the N.N. Blokhin Russian Cancer Research Center, and Moscow Oncology Dispensary Five. A microwave radiothermometer was used to measure core and skin temperatures in 9 symmetrical points of each breast. Using the findings as a basis, the authors proposed quantitative criteria that ensured that breast tumors should be differentially diagnosed with high specificity