КОРПОРАТИВНІ ОБЛІГАЦІЇ ЯК ДЖЕРЕЛО РОЗВИТКУ ФІНАНСОВОГО ПОТЕНЦІАЛУ СУБ’ЄКТІВ ГОСПОДАРЮВАННЯ

The success of business entities depends on the ability to attract the necessary amount of financial resources to carry out activities. One of the most important issues in raising capital through the issuance of corporate bonds is to identify the factors and trends that affect this process in the context of developing the financial potential of economic entities. The aim of the research is to analyze the current state of the issue activity of business entities and determine the impact of the issue of corporate bonds on the capital formation of business entities. The subject of the research is the formation of capital through the issuance of bonds in the context of the development of the financial potential of economic entities. The methods of the research: generalization, comparison, trend analysis, trend models. The statement of basic materials. The article highlights the features of corporate bonds as an additional source of development of the financial potential of economic entities. The state and dynamics of issue activity of business entities on bond issue and activity on the secondary market of corporate bonds are analyzed. A nonlinear regression model has been formed, which reflects the dynamics of emission activity of economic entities. A polynomial model of capital dependence on bond issues of economic entities has been built. The practical significance of the research lies in the possibility of applying the built models in the process of forming a strategy of financial regulation of the development of economic entities. Conclusions and perspectives of further research. Corporate bonds are a potential source of financing for the development of economic entities. Trend analysis of the issue activity of enterprises on the issue of corporate bonds indicates the underdevelopment of this segment of the stock market. In the process of studying the financial potential of the development of economic entities should take into account the dependence of the formed capital and emission activity, activity in the secondary market of bonds of economic entities. The constructed models of nonlinear regression of the dynamics of bond issues and the polynomial model of the dependence of capital on bond issues of economic entities will increase the objectivity of forecasting.

Reducing the Emission Activity of Vanadium from Building Materials

The article presents a study of the possibility of controlling the emission activity of heavy metals from building materials and structures. It has been established that the most active emission processes from building materials obtained using industrial wastes placed in aqueous media occur in the first five days in a neutral medium, and in the first ten days in an acidic medium. After that, the concentration of heavy metals in the aquatic environment begins to decrease. The results obtained on particular examples made it possible to establish dependencies that determine the intensity of emission processes under various conditions of contact between building materials and an aqueous medium. These dependencies are of a general nature and can be used to predict and control the formation of anthropogenic load. It is shown that the control of emission processes from building structures is possible by forming the structure of the material in the direction of increasing its hydrophobicity, density, and the content of alkaline compounds.

Issuing opportunities of the Kazakhstan stock market: unrealized gains

The Kazakhstani economy has a significant emission potential. The study reveals the issues of the restraining influence on the development of Kazakhstani companies' emission activity. Among them are the role of bank lending in financing the national economy; government discouragement of economic development; weak efficiency of administrative and tax preferences for issuers. An important factor is the doubt of Kazakhstani companies on their capital fair evaluation in the market. In particular, the study noted that over the past five years, there has been a stable trend towards a decrease in bank lending as for large, the same is for small and medium-sized businesses. Basing on the continuing low number of new registrations of prospectuses for the issue of shares, there arises an issue of finding ways to meet the needs of business entities in financing. The findings from the analysis of sources of financing the State programs in the Republic of Kazakhstan showed the amount of possible funding from the stock market instruments. The study of data over the past few years made it possible to conclude that the methods and ways of using funds allocated under these state programs actually discourage business and local governments to use the emission potential that Kazakhstani market participants currently have. Administrative and tax preferences that operate in Kazakhstan for domestic participants in the stock market are either mainly aimed at investors or rather incomprehensible and imperceptible for potential issuers. Uncertainty in achieving the planned funding levels and in a fair assessment of the company's capital cost, basing on the above factors identified as a result of the study, is the main constraining reason for the low emission activity of Kazakhstani stock market participants.

The CHIMERE v2020r1 online chemistry-transport model

The CHIMERE v2020r1 model replaces the v2017r5 version and provides numerous novelties. The most important of which is the online coupling with the WRF meteorological model, via the OASIS3-MCT external coupler. The model can still be used in offline mode; the online mode enables taking into account the direct and indirect effects of aerosols on meteorology. This coupling also enables using the meteorological parameters with sub-hourly time-steps. Some new parameterizations are implemented to increase the model performance and the user's choices: DMS emissions, additional schemes for SOA formation with VBS and H2O, improved schemes for mineral dust, biomass burning and sea-salt emissions. The NOx emissions from lightning is added. The model also includes the possibility to use the splitting-operator integration technique. The subgrid scale variability calculation of concentrations due to emission activity sectors is now possible. Finally, a new vertical advection scheme has been implemented, able to simulate more correctly long-range transport of thin pollutants plumes.

Aseismic strain episodes at Campi Flegrei Caldera, Italy

Since 2004 a research project has been developed to monitor subsurface deformation of Italian volcanoes using borehole strainmeters and long-baseline tiltmeters. Six Sacks-Evertson dilatometers were installed around Campi Flegrei caldera and Vesuvius during 2004–2005 (Scarpa et al., 2007), and in 2008 these instruments were supplemented by two arrays of 28–280 m long water-tube tiltmeters in underground tunnels. Relevant strainmeter and tiltmeter data have been collected and analysed from the instruments installed near Campi Flegrei caldera during the recent unrest episodes. In the period 2004–2005 strain, tilt and GPS data from Campi Flegrei indicate the onset of surface deformation that accompanied a low rate of vertical displacement that continued to 2006, corresponding to an increase of CO2 emission. This strain episode preceded caldera microseismic activity by a few months, as was observed also during a significant inflation episode in 1982. Other transient strain episodes occurred in October 2006, which were accompanied by a swarm of VT (Volcano-Tectonic) and LP (Long Period) events, in 2009, at the time of renewed gas emission activity at Solfatara, and again in March 2010, several minutes before a seismic swarm. The time scale of these transient strain events ranges from some hours to several days, putting tight constraints on the origin of ground uplifts at Campi Flegrei. Their location is compatible with a source inferred from long term deformation signals, located about 4 km beneath Pozzuoli. A proposed mechanism for these aseismic strain episodes is that they are associated with magma growth in reservoirs with occasional pressure relief associated with the leakage of gas.

Assessing the Impact of Corona-Virus-19 on Nitrogen Dioxide Levels over Southern Ontario, Canada

A lockdown was implemented in Canada mid-March 2020 to limit the spread of COVID-19. In the wake of this lockdown, declines in nitrogen dioxide (NO2) were observed from the TROPOspheric Monitoring Instrument (TROPOMI). A method is presented to quantify how much of this decrease is due to the lockdown itself as opposed to variability in meteorology and satellite sampling. The operational air quality forecast model, GEM-MACH (Global Environmental Multi-scale - Modelling Air quality and CHemistry), was used together with TROPOMI to determine expected NO2 columns that represents what TROPOMI would have observed for a non-COVID scenario. Applying this methodology to southern Ontario, decreases in NO2 emissions due to the lockdown were seen, with an average 40% (roughly 10 kt[NO2]/yr) in Toronto and Mississauga and even larger declines in the city center. Natural and satellite sampling variability accounted for as much as 20–30%, which demonstrates the importance of taking meteorology into account. A model run with reduced emissions (from 65 kt[NO2]/yr to 40 kt[NO2]/yr in the Greater Toronto Area) based on emission activity data during the lockdown period was found to be consistent with TROPOMI NO2 columns.

Modeling and simulation of Compton scatter image formation in positron emission tomography

We present the comparative study of the analytical forward model and the statistical simulation of the Compton single scatter in the positron emission tomography. The formula of the forward model has been obtained using the single scatter simulation approximation under simplified assumptions, and therefore we calculate scatter projections using independent Monte Carlo simulation mimicking the scatter physics. The numerical comparative study has been performed using a digital cylindrical phantom filled in with water and containing spherical sources of emission activity located at the central and several displaced positions. Good fits of the formula-based and statistically generated profiles of scatter projections are observed in the presented numerical results.

One-Step Synthesis of the Nitrogen and Sulfur Codoped Carbon Dots for Detection of Lead and Copper Ions in Aqueous Solution

Herein, by using the green and cheap L-cysteine as the precursor, nitrogen and sulfur codoped carbon dots (NS-CDs) were synthesized via a facile one-step hydrothermal method. The obtained NS-CDs showed the relatively narrow size distributions (2.1~3.9 nm) with the lattice spacing of 0.29 nm, as well as the excitation-dependent photoluminescence (PL) emission activity with the quantum yield (QY) of 18%. More interestingly, the PL intensity of NS-CDs was quenched by the addition of copper or lead ions (Cu2+ or Pb2+), which was shown in the tradition detection method by PL spectra. The NS-CDs exhibited ultrasensitive colorimetric sensing capability for both Cu2+ and Pb2+ by the color variance using naked eyes without any further treating. Two different coupling ways for detecting Pb2+ and Cu2+ were induced by the analysis of the Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). And the as-prepared NS-CDs showed their potential application in the heavy metal ions detection for the wastewater determination.