scholarly journals On ways to improve the efficiency of water propellers

Author(s):  
A. V. Mesropyan ◽  
Yu. A. Shabelnik

Objective. The purpose of the analytical review is to identify promising areas of research to improve the efficiency of water propellers.Method. The research provides an overview and analysis of modern propellers.Result. The analysis of the design – layout and schematics solutions of propeller is carried out, methods of increasing the efficiency of propellers are revealed, the main directions of further research are formed. Prospects for the development of propellers are considered, structural and layout and circuit solutions are described that ensure an increase in the efficiency of the working process, which allows to form the main directions of further scientific research. Created promising circuit solutions are closely related to the use of modern numerical methods at all stages of design, new approaches to the creation of propellers will provide an increase in efficiency by 8-10%.Conclusion. Increasing the efficiency of propellers, due to modeling workflows using numerical methods of hydrodynamics, and developing advanced schematics solutions, will not only increase the efficiency, but also improve the cavitation and acoustic characteristics of the propellers. The use of CFD calculations allows you to reduce the time, costs and volumes of product development work.

Oikos ◽  
2014 ◽  
Vol 16 (33) ◽  
pp. 69
Author(s):  
Luis Muñoz Medina ◽  
Rafael Pizarro Rodríguez

The Role of Rhetoric and Metaphors in Organisational Change  RESUMEN El presente artículo es una recopilación de literatura científica que demuestra la relevancia de comprender nuevas formas de construir el concepto de cambio organizacional a través del lenguaje, en especial a través de claves lingüísticas como la retórica y metáfora. Esta construcción ayuda a generar procesos de cambio organizacional que presenten una menor intensidad y carga emocional negativa para los individuos, así como una mejor comprensión del mismo cambio para los empleados. Palabras clave: cambio, organización, retórica, metáfora. ABSTRACT This article is a compilation of scientific literature about the importance of understanding new approaches to the construction of the organisational change concept through language, especially through linguistic devices such as rhetorical and metaphorical ones. This construction helps the creation of organisational change processes with lower levels of impact and a lower negative emotional burden for individuals as well as a better understanding of such changesKeywords: changes; organisation; rhetoric; metaphor. 


Acta Numerica ◽  
2021 ◽  
Vol 30 ◽  
pp. 765-851
Author(s):  
Wei Wang ◽  
Lei Zhang ◽  
Pingwen Zhang

Liquid crystals are a type of soft matter that is intermediate between crystalline solids and isotropic fluids. The study of liquid crystals has made tremendous progress over the past four decades, which is of great importance for fundamental scientific research and has widespread applications in industry. In this paper we review the mathematical models and their connections to liquid crystals, and survey the developments of numerical methods for finding rich configurations of liquid crystals.


2021 ◽  
Vol 3 (3) ◽  
pp. 96-123
Author(s):  
L.V. Shchennikova

Introduction: the article deals with the methodological problem of the meaning of the goal of civil law research. The author analyzes the dissertation abstracts from the point of view of goal setting, which were completed in different periods of the development of Russian civil law science, identifies the qualitative characteristics of the stages, and proves the connection of the achieved results with the researcher’s knowledge of the methodological methods of goal setting. Purpose: to show the value of goal setting in scientific research in general and in civil research in particular; to consider the relationship of goal setting with the achievement of specific scientific results on the examples of dissertations defended in the specialty 12.00.03; to justify the need to set as goals the fundamental problems associated with the identification of patterns of development of relations that are part of the subject of civil law regulation and the creation of effective mechanisms that mediate them. Methods: system-structural, system-functional, generalization, abstraction, analogy, logical, statistical, classification, legal modeling, comparative legal, forecasting, formal legal, historical. Results: civil methodology should take into account the importance of the goal in the organization of scientific work. Only a competent possession of goal setting skills can ultimately ensure the creation of scientifically-based mechanisms for effective impact of civil law norms on regulated social relations. Conclusions: 1) any science, including the science of civil law, is not only designed to study and describe existing problems, including legislative, doctrinal, and law enforcement. Research, in order to meet the criterion of scientific character, must attempt to identify the laws of development, both regulated relations and mechanisms that mediate them; 2) the significance of the goal in the development of science has been proven by outstanding philosophers. In addition, the very definition of science indicates that goal setting is one of its essential characteristics; 3) the analysis of the author’s abstracts of leading Russian tsivilists showed how the skilful setting of research goals helped to achieve them consistently, as well as to create a high-quality categorical apparatus of civil law science; 4) the analysis of modern dissertations showed that not all young researchers see the value of goal-setting and this methodological disadvantage is important for the author to eliminate.


2018 ◽  
Vol 43 (4) ◽  
pp. 517-543 ◽  
Author(s):  
Ruggero Sainaghi ◽  
Manuela De Carlo ◽  
Francesca d’Angella

This article aims to identify the key elements underlying a destination capability (DC) and to examine what the genesis of these factors is and how they interact to foster the destination development. The article explores a specific development process—the creation of a new product in an alpine destination (Livigno, Italy)—making use of a theoretical framework structured around four major dimensions: DCs, coordination at the destination level, inter-destination bridge ties, and destination development. The results help clarify the genesis of a DC in the context of new product development. First, the dynamics underlying the creation of a DC show that coordination at the destination level constitutes the heart of the process, whereas the integration of scattered resources in the new product plays a more limited role. Second, from a dynamic perspective, the analysis has identified three patterns (scouting, implementation, and involvement).


2021 ◽  
pp. 15-23
Author(s):  
V. F. Pivovarov ◽  
A. V. Soldatenko ◽  
O. N. Pyshnaya ◽  
L. K. Gurkina

The article reflects the issues of the current state of scientific research at the FSBSI FSVC, shows the directions and prospects for the development of selection and seed production of vegetable crops. The main mission of the selection and seed-growing work of the FSVC is the creation and reproduction of varieties and hybrids of vegetable and melon crops of a new generation, characterized by resistance to abiotic and biotic stressors, high productivity and product quality. One of the main ways to increase the efficiency of the breeding process is the use of modern methods of biotechnology and molecular genetics, which make it possible to obtain new genotypes and reduce the time of breeding. Success has been achieved in the creation of homozygous lines of cabbage, squash, cucumber, carrots. For the first time, it was possible to complete a full cycle of obtaining doubled radish haploids in microspore culture in vitro. The institution pays special attention to immunological research on the resistance of crops and new varieties to diseases, as well as protecting plants from pests and diseases. Phytosanitary monitoring, assessment and selection of resistant genotypes are carried every years. One of the important theoretical and practical problems solved at the institution is the development of environmentally friendly products based on preparations obtained from plants with a high content of biologically active compounds with adaptogenic properties. In the center, a new direction of research in traditional breeding has received significant development - the creation of varieties of vegetable plants with an increased content of biologically active substances and antioxidants, on the basis of which functional products are created. The persistence of modern varieties and hybrids of table carrots, depending on the biochemical composition, has been studied. Methods for enriching vegetable plants with micronutrients are being developed. A large amount of scientific research is being carried out on the development of technologies for the cultivation of new varieties and hybrids, as well as technologies for their seed production. At the branches located in different soil and climatic conditions, hospitals were established to study the interaction of factors controlling soil fertility and the productivity of vegetable crops in agrocenoses (crop rotation, soil treatment systems, fertilizers and plant protection). In general, at the FSBSI FSVC, all research is aimed at developing and improving methods in breeding and seed production of vegetable crops, creating new breeding achievements and developing varietal technologies for their cultivation.


2021 ◽  
Vol 81 (2) ◽  
pp. 21-26
Author(s):  
S. V. Vasyliev

The study is focused on the legal regulation of state support for the creation of innovative medicinal products. Establishment of the measures of state support for scientific research for creating innovative medicinal products within legislative acts and by-laws should help to increase the competitiveness of the pharmaceutical industry in Ukraine. The government declares the provision of support for scientific research in the field of creating innovative medicinal products. The legislation establishes the conditions for registering an innovative project, provides the maintenance of the Register of scientific institutions that received the state support. A detailed characteristic of the existing means of the state support for scientific research in the pharmaceutical industry is provided. The state supports innovations by establishing tax incentives for research institutions and providing funding for some innovative projects. Support for innovations is carried out by the State Innovative Financial and Credit Institution, the National Research Fund of Ukraine and the Innovation Development Fund. Funding for the creation of innovative medicinal products can be realized through public and private partnership. The scholars have declared their propositions regarding the introduction of specific measures of the state support for innovations in the field of creating new medicinal products. It has been offered to amend the current legislation on the issues of state funding of scientific research in the sphere of developing new medicinal products. It is necessary to delineate the competence of various funds for promoting innovations in relation to supporting innovations in the field of pharmacia. It is important that the law should provide the procedure and conditions for supporting public and private partnership projects at the expenses of funds for promoting innovations.


2021 ◽  
Author(s):  
Rozemien De Troch ◽  
Piet Termonia

<p>The Belgian expertise with respect to climate research is very fragmented and led by both federal (like the Royal Meteorological Institute of Belgium, hereafter RMI) as well as regional scientific research institutions and universities. Furthermore, both in societal, research as well as policy context there is an increasing need for detailed, quantitative, reliable and consistent climate information and services, in particular linked to the expected climate changes and its impacts in different sectors (e.g. water, agriculture, energy, health, transport).</p><p>To make all this scientific expertise and climate information available in a coordinated and, above all, user-friendly way, a Belgian climate centre or a one-stop shop for climate research and services would fully address the needs. With its long-standing scientific expertise and service provision, RMI plays a crucial role in fulfilling this growing need for climate information and services.</p><p>Hence, RMI has elaborated a proposal on the creation of a Belgian climate centre. For the creation of such centre it is preferable to use existing collaborations from previous or ongoing research and service-provision activities in Belgium, requiring a structural cooperation in which each members’ expertise can be fully deployed. In the context of a previous research project, a large consortium of Belgian research institutions active in regional climate modelling, calculated for the first time a consistent set of high-resolution climate projections and sectoral impacts for Belgium. Nevertheless, it should be emphasized that the number of models used was far too limited to develop reliable information of the future climate. Moreover, this was a one-time project and there is currently an urgent need to update the climate projections to meet the new scientific requirements of the IPCC's new sixth Assessment Report.</p><p>One of the activities of the centre would thus be the coordination of the climate research based on scientific research projects. Furthermore, in order to ensure the continuous development and provision of climate services based on this objective and scientifically based expertise coming from Belgian climate scientists, the climate centre would carry out two main core tasks: (i) the production and storage of climate information and (ii) the support for the development of climate services.</p><p>The financing and implementation of a Belgian climate centre, would provide a structural framework for climate research and services, establishing partnerships with the various regions and communities, at both policy and research levels. In this way, RMI, as national meteorological institute and at the start of the climate services value chain, can guarantee a continuous scientific expertise and respond to the major needs for climate information and services at national and international level.</p>


2021 ◽  
Vol 09 (02) ◽  
pp. 11-23
Author(s):  
Abhinav Sood ◽  
Varsha Dogra ◽  
Gayatri Pathmanathan

2019 ◽  
Vol 11 (1) ◽  
pp. 39-42
Author(s):  
Anita Darabos ◽  
Judit Szalai

Abstract Nowadays, concerns related to mankind’s increasing and destructive impact on the environment have influenced and changed the paradigms of product development; this in turn has brought about the appearance of environmental considerations in the creation and design of new products. Numerous industrial sectors have changed their processes of product development and production to meet the ecological requirements. Issues such as the scarcity of natural resources, increasing consumption and increasing pollution also present a number of problems. This article presents a process of comparing new alternatives with a specific methodology of decision-making. It is primarily focused on the use of rare natural materials and resources that are extracted and processed.


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