420 research outputs found
Zinc oxide-nickel cermet selective coatings obtained by sequential electrodeposition
The investigation of pulse electrodepositing modes influence on crystal structure, morphology and optical properties of ZnO has revealed the conditions in which quasi-one-dimensional (1D) ZnO nanorod arrays are formed as separate nanorods. Due to a sufficiently high resistance of zinc oxide, the electrodeposition of nickel on the fluorine doped tin oxide (FTO)/ZnO surfaces carried out in space between the ZnO nanorods. An incomplete filling of the gaps between nanorods by the nickel nanoparticles through subsequent Ni electrodeposition ensured the creation of ZnO–Ni graded cermets. The cermets, in which electrochemical filling of the spaces between ZnO nanorods by Ni, was performed in the pulse mode. It provided higher absorption of visible and near IR light. It was shown that the manufactured ZnO–Ni graded cermets have high light absorption combined with comparatively low thermal losses, so these cermets are promising cheap and affordable selective coatings for solar heat collectors
Past distribution of Tilia-feeding Phyllonorycter micromoth (Lepidoptera: Gracillariidae) in the Russian Far East based on survey of historical herbarium
Distribution data of Tilia-feeding Phyllonorycter in the Russian Far East have been retrieved from a century-old Tilia herbarium stored in Vladivostok. Overall, 280 typical mines of Phyllonorycter, some with larvae and pupae, were found on 61 out of 799 herbarized specimens of Tilia spp. collected in Khabarovskii krai and Primorskii krai. For the
first time, the presence of Tilia-feeding Phyllonorycter has been documented in Amurskaya oblast and Jewish Autonomous oblast. High densities of the leafminer have been recorded on Tilia amurensis sampled in Khabarovskii krai and Primorskii krai between 1937 and 2005 suggesting a population dynamics with recurrent outbreaks. Our results confirm the importance of historical herbarium collections in studying trophic interactions and invasion ecology of folivore organisms
Analytical aspects of anti-crisis measures of public administration
The study of crises is one of the most important areas of economic science. Sanctions against Russia in 2022 have led to significant functional and structural shifts in the national economy. Effective anti-crisis management in crisis conditions becomes one of the main directions of its overcoming in Russian economy. The issues of improving the mechanism of crisis management at the present historical stage are actualised. The purpose is study of anti-crisis management methods for the development of an effective anti-crisis mechanism. Objectives is to study the existing methods of anti-crisis management in the light of international experience. The authors used methods of analysis, synthesis and comparison, and abstract-logical method in the research. The analytical method of information processing, synthesis and deduction of theoretical aspects of the concept of crisis and crisis management was carried out. A study of methods of crisis management, considering international experience, systematization and analysis of existing principles of state crisis management of the economy was carried out. The content and role of modern methods of crisis management deserves special attention. In the context of the sanctions announced against Russia, it is necessary to develop more advanced approaches to crisis management. The model of the anti-crisis mechanism for building an effective management system in the country’s economy is considered
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