ISSUES OF ENSURING ECONOMIC AND ENERGY SECURITY IN THE “SMART CITY” SYSTEM

The publication reflects the results of research on economic security issues at the level of administrative center of the subject of the Russian Federation in the context of the development of the “smart city” system. Cutting-edge technologies are becoming a powerful engine of transformation, including the energy sector. Development of smart cities and digitalization of services require reorganization of the energy business, search of new innovative opportunities and the development of new strategies, the final result of which will be the creation of new business models for energy suppliers. As a result of largescale statistics and practical cases analysis the main (specific) smart risks, smart challenges and smart threats for the economic security system of the largest city have been classified, recommendations to modify existing business models for Russian energetic industry have been offered

METHOD OF CALCULATING THE PROCESSES OF ICE GENERATION

The article presents an approach to the numerical implementation of the two-phase Stefan problem, useful in creating new and improving existing technical devises for ice production. The features of the author’s calculation method, which favorably distinguish it from similar developments, are given. The results of calculations are presented and they are discussed.В статье представлен подход к численной реализации двухфазной задачи Стефана, полезный при создании новых и совершенствовании существующих технических устройств для получения льда. Приведены особенности авторской методики расчета, выгодно отличающие ее от подобного рода разработок. Представлены результаты расчетов и проведено их обсуждение

The Dilemma of Inward FDI in the EU and U.S. Investment Policy: Ensuring Capital Inflows and/or Strengthening Control of Strategic Assets?

The growing awareness of the security issues, safeguarding the leading positions in strategic industries, and upholding competitive advantages has tightened the rules regarding the admission of foreign direct investment (FDI). Recent changes in policy and legislation of the United States and the EU concerning FDI set current trends and determine future perspectives in investment inflows regulation. We are currently facing a global trend towards more selective and detailed regulation of foreign investment, rethinking liberal approaches and open borders policy as the global confrontation of the new eco[1]nomic power centers becomes increasingly tougher.The issue of ensuring FDI inflow into the national economy avoiding risks of undermining leading positions in strategic industries is of a particular academic interest. The implementation of investment screening procedures is becoming one of the important tools of the new national security strategies. Investment screening models in the EU and in the U.S., the key trendsetters in FDI regulation, have a range of differences and similarities analyzed in this article. Therefore, within the framework of the current research we can make an important contribution to the further formation of new global strategies for FDI regulation

Improving of the heat supply energy efficiency in Russian cities through the individual heat points introduction

This article states the problems with the use of central heating stations, as well as the need to introduce individual heat points. As a result, the authors considered the issue of improving the energy efficiency of heat supply systems in Russian cities while replacing central heating stations with individual heat points. The beneficial effects of the activities are especially noted

Silica nanoparticles with dual visible–NIR luminescence affected by silica confinement of Tb(III) and Yb(III) complexes for cellular imaging application

© 2019, Springer Science+Business Media, LLC, part of Springer Nature. The work introduces silica confinement of Tb(III) and Yb(III) complexes with p-sulfonatothiacalix[4]arene (TCAS) arisen from their doping into silica nanoparticles (51–60 nm) as the reason for efficient dual green–NIR luminescence. pH-regulated water solubility of the lanthanide complexes is highlighted as prerequisite for the balance between efficient doping of the complexes into silica nanoparticles and their size/shape university. The impact of Tb(III) → Yb(III) energy transfer on the NIR and visible luminescence of the nanoparticles was revealed from photophysical studies of the nanoparticles doped with different couples of lanthanide complexes (Tb–Gd, Tb–Yb, Yb–Gd) at various molar ratios. The optimal balance between green and NIR luminescence is achieved for the silica nanoparticles doped with Tb–Yb complexes at 2:1 (Tb:Yb) ratio due to both Tb(III) → Yb(III) energy transfer and specific distribution of Tb(III) and Yb(III) complexes within silica nanoparticles. The dual luminescent nanoparticles exhibit efficient cellular uptake behavior after amino-decoration of their surface, which is confirmed by confocal microscopy images of the cells incubated by the heterometallic nanoparticles

Silica nanoparticles with dual visible–NIR luminescence affected by silica confinement of Tb(III) and Yb(III) complexes for cellular imaging application

© 2019, Springer Science+Business Media, LLC, part of Springer Nature. The work introduces silica confinement of Tb(III) and Yb(III) complexes with p-sulfonatothiacalix[4]arene (TCAS) arisen from their doping into silica nanoparticles (51–60 nm) as the reason for efficient dual green–NIR luminescence. pH-regulated water solubility of the lanthanide complexes is highlighted as prerequisite for the balance between efficient doping of the complexes into silica nanoparticles and their size/shape university. The impact of Tb(III) → Yb(III) energy transfer on the NIR and visible luminescence of the nanoparticles was revealed from photophysical studies of the nanoparticles doped with different couples of lanthanide complexes (Tb–Gd, Tb–Yb, Yb–Gd) at various molar ratios. The optimal balance between green and NIR luminescence is achieved for the silica nanoparticles doped with Tb–Yb complexes at 2:1 (Tb:Yb) ratio due to both Tb(III) → Yb(III) energy transfer and specific distribution of Tb(III) and Yb(III) complexes within silica nanoparticles. The dual luminescent nanoparticles exhibit efficient cellular uptake behavior after amino-decoration of their surface, which is confirmed by confocal microscopy images of the cells incubated by the heterometallic nanoparticles