The influence of Ag/SiO2 as nanofiller and sodium oleate as compatibilizer and their mixtures on the patterns flow and structure formation processes in thermodynamically incompatible polypropylene/plasticized polyvinylalcohol (PP / PVA) systems were studied. It is found that the change in the sequence of mixing the ingredients of the composition allows adjusting the morphology phase type due to the predominant localization of nanoparticle additives in the melt amount of a component or on the border of phase separation. Injection of Ag/SiO2 to melt PP increases dispersion degree and homogeneity of its distribution in the matrix. Simultaneous use of nanoadditive and sodium oleate as compatibilizer improves the connections between the polymers and promotes thinner and more homogeneous dispersion of the particles of the dispersed phase. It is shown that the effective viscosity of melt nanofilled system is determined by components mixing method: viscosity of melt blend increases when the additive is localized predominantly in the PVA and decreases with the prior injection of PP. The nature of the flow for all researched compositions obeys a power law and almost does not depend on the method of mixing. The ability of the longitudinal deformation of ternary blends is deteriorating, but remains sufficient for their processing. Combining nanoadditive with compatibilizer promotes increased elasticity and the melt spinnability of modified blends.
The article is devoted to the study of the organization of air medicine and the architectural design of helipads in hospitals located in an urban environment. Also, the article has an attempt to draw public attention to the inevitable development of air medical aviation as a new and promising type of emergency medical transport in dense urban areas, which, in the processes of urbanization, will be aggravated by blocking the possibility of automobile movement in the city. The purpose of the article is to analyze the main problems and difficulties that accompany the design and operation of medical helipads in an urban environment, as well as to propose and systematize the main features and parameters that must be considered when designing helipads in hospitals. Methodology: the study consists of a systematic, and comprehensive analysis of the problems of architectural design of hospital helipads. The study used the analysis of literary, normative, informational sources, graphic-analytical methods, photographs and field research. The research methodology consists of a set of methods of practical, theoretical, empirical, retrospective and factor analysis. Conclusions: when designing a heliport in a hospital, it is essential to provide the shortest and safest route for a patient to the intensive care unit or operating room. Helipads for medical use are best located directly on the hospital grounds (on the roof of a hospital building or outbuilding, on the ground). It is also necessary to take into account the presence of a network of public heliports, which will create the possibility of landing and takeoff of medical helicopters in different parts of the urban space.
Urbanization today is a global process that "shrinks" and "densifies" urban areas, whilst significantly and chaotically expanding cities. As a result, many problems arise, including the reduction or destruction of green spaces. This study proposes the systematization of urban landscapes at the global, macro, local, and micro levels to improve the sustainable development of urban areas. The article also discusses the impact of the urbanized landscape on the level of happiness and quality of life of urban residents, and the possibility of their participation in the development of greening of urban spaces. The purpose of the article: the research goal is to propose a concept for the systematization of the urbanized landscape, which is based on the vector of sustainable development in order to improve the level of happiness and quality of life of people in the largest cities. The methods of the scientific work: the methods of complex and system analysis, the historical method, cartography, photographic fixation, work with archives, the study of literary data, etc. were used. The main results: the result presents the systematization of urban landscapes as a single system, the identification of the main components of the four levels of this system, and their characteristics in terms of their impact on the level of happiness and quality of life of people. Taking into account the fact that the level of happiness of each individual or community depends on many factors and is a fairly broad concept, in this article, this term is understood as satisfaction with the degree of saturation with natural elements in the environment. At the same time, the quality of life is the ability of a person (or community) to directly contact with nature and its various constituent elements in the urban environment.
An analysis has been made of the effect of different additives on the properties of starch-based polymer composites. The authors describe the principal stages of the technology for producing such materials, which can be used for creating new ecologically safe biodegradable materials for the manufacture of films, packaging, and different products of short-time use. Their main trade names and manufacturers are given.
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