Further Development and Preliminary Testing of the α-Prototype of an Ultra-Micro Gas Turbine for Portable Power Generation

2008 ◽  
Author(s):  
R. Capata ◽  
E. Sciubba
Keyword(s):  
Fluid Dynamic ◽  
Fem Analysis ◽  
Point Of View ◽  
Power Sources ◽  
Preliminary Testing ◽  
Micro Gas Turbine ◽  
Portable Power ◽  
Portable Electronics ◽  
Further Development ◽  
Physical Construction

The ever increasing development of portable electronics leads to a higher demand for compact and reliable power sources. Significant resources are being presently dedicated to the study of micro machined turbines, because of their remarkable power density that suggests that the generation of about 100–300 W with a total device weight of few hundreds grams and a fuel mass flow rate of few grams per second may be feasible in the short range. In this paper a possible configuration of such a nano-GT set is considered, which was defined on the basis of previous thermo-fluid dynamic analysis: the results of a preliminary design study, including some cold-run tests, are reported in this paper. The layout of the device was finalized on the basis of both a CFD and a FEM analysis that identified the “optimal” blade shape, shaft size and rotors arrangements under the point of view of the energy efficiency and of thermo-mechanical material stresses, Some of the problems deriving by the physical construction and preliminary testing of the prototype are analyzed and discussed.

Design and Performance Prediction of a Ultra-Micro Gas Turbine for Portable Power Generation

2007 ◽  
Author(s):  
R. Capata ◽  
E. Sciubba
Keyword(s):  
Gas Turbine ◽  
Social Impact ◽  
Point Of View ◽  
Entropy Generation Rate ◽  
Design Strategies ◽  
Power Sources ◽  
Micro Gas Turbine ◽  
Portable Power ◽  
Rate Analysis ◽  
And Performance

In the last decades, the enormous growth in portable electronics applications has stimulated research in lightweight and reliable power sources. In this technological niche, the idea of developing miniaturized turbomachinery to serve as portable power sources is attractive, especially in view of the much higher power density of a small turbogas generator in comparison with conventional chemical batteries. The potential social impact of an eventual commercialization of such “nano-devices” is enormous, but the technological and phenomenological complexity of the design and manufacturing of ultra-small machines (with a rotor diameter of the order of 1 cm) poses difficult problems, because some of the well-established design procedures for large and medium scale machines do not seem to be applicable as such at these extremely reduced scales. In this work the design and performance of a miniaturized gas turbine with a tip diameter of about 10 mm is examined from a thermo-fluiddynamic point of view. An extensive series of CFD simulations allows for the quantification of the losses at the resulting low Reynolds numbers (∼4600 in the stator and ∼1500 in the rotor) on the single-curvature geometry imposed by manufacturing constraints. The geometry of the blades is “optimized” on the basis of an entropy generation rate analysis, and the capabilities and limitations of conventional design strategies are assessed.

scholarly journals Fabric-Based Triboelectric Nanogenerators

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Jinmei Liu ◽  
Long Gu ◽  
Nuanyang Cui ◽  
Qi Xu ◽  
Yong Qin ◽  
...  
Keyword(s):  
High Performance ◽  
Material Synthesis ◽  
Power Sources ◽  
Practical Applications ◽  
Energy Harvesters ◽  
Portable Electronics ◽  
The Past ◽  
Triboelectric Nanogenerators ◽  
Energy Harvesting Devices ◽  
Further Development

In the past decades, the progress of wearable and portable electronics is quite rapid, but the power supply has been a great challenge for their practical applications. Wearable power sources, especially wearable energy-harvesting devices, provide some possible solutions for this challenge. Among various wearable energy harvesters, the high-performance fabric-based triboelectric nanogenerators (TENGs) are particularly significant. In this review paper, we first introduce the fundamentals of TENGs and their four basic working modes. Then, we will discuss the material synthesis, device design, and fabrication of fabric-based TENGs. Finally, we try to give some problems that need to be solved for the further development of TENGs.

Preservation of Documental Heritage of the Republic of Sakha (Yakutia) Peoples

2009 ◽  
pp. 34-39
Author(s):  
Galina F. Leveryeva ◽  
Afanasii R. Batorov
Keyword(s):  
Point Of View ◽  
Information Portal ◽  
Rare Books ◽  
The Republic ◽  
Further Development

Questions of creation and development of information portal “Memory of Yakutia” from the point of view of accumulation and preservation of documental heritage of Yakutia nations are considered. Problems of digitization of manuscripts, rare books, audiovisual documents are highlighted and trends of further development are traced.

Party-Political and Socio-Economic Сonsequences of Elections to the German Bundestag

2021 ◽  
pp. 24
Author(s):  
V.B. Belov
Keyword(s):  
Point Of View ◽  
The European Union ◽  
Social Democrats ◽  
The Social ◽  
Angela Merkel ◽  
The Face ◽  
German Bundestag ◽  
The Impact ◽  
Further Development

The article examines the results of the last Bundestag elections. They marked the end of the Angela Merkel era and reflected the continuation of difficult party-political and socio-economic processes in the informal leader of the European Union. The main attention of the research focuses on the peculiarities of the election campaign of the leading parties and of the search for ways of further development of Germany in the face of urgent economic and political challenges. These challenges include the impact of the coronavirus crisis, the impact of the energy and digital transition to a climate-neutral economy, and the complex international situation. Based on original sources, the author analyzes the causes of the SPD victory and the CDU/CSU bloc defeat, the results of the negotiations of the Social Democrats with the Greens and Liberals, the content of the coalition agreement from the point of view of the prospects for the development of domestic and foreign policy and the economy of Russia's main partner in the west of the Eurasian continent. The conclusion is made about the absence of breakthrough ideas, the consistent continuation of the course started by the previous government for a carbon-free economy and the strengthening of the role of Germany in Europe and the world. For this course, conflicts and problems in achieving the set goals will be immanent due to the compromising nature of the coalition agreements.

TRANSPORT INFRASTRUCTURE ADAPTATION

2021 ◽  
Vol 73 (2) ◽  
pp. 92-98
Author(s):  
O.U. BULATOVA ◽  
Keyword(s):  
Social System ◽  
Point Of View ◽  
Transport Infrastructure ◽  
Technological Changes ◽  
Technical Process ◽  
Transport Services ◽  
Market Relations ◽  
Transport Complex ◽  
The City ◽  
Further Development

The transition of a city to the «Smart city» level is a socio-technical process: first, the transi-tion includes technical and technological changes, and second, since the city is a social system, this process considered from the point of view of users who influence the development of certain types of services and devices for their provision. This article examines the process of digitalization of the city and transport infrastructure in particular. To fulfill the goal set for the transport infrastructure - complete, timely and high-quality transport services for the population, it is necessary to solve a whole range of tasks that are associated with the further development of market relations and improving the efficiency of the transport complex.

Market Opportunity Analysis in Thailand: Case of Individual Power Sources by Thermoelectric-Generator Technology for Portable Electronics

2019 ◽  
Vol 16 (03) ◽  
pp. 1950027
Author(s):  
Surapree Maolikul ◽  
Thira Chavarnakul ◽  
Somchai Kiatgamolchai
Keyword(s):  
Thermoelectric Generator ◽  
Electrical Power ◽  
Technology Commercialization ◽  
Market Opportunity ◽  
Business Research ◽  
Power Sources ◽  
Practical Applications ◽  
Portable Electronics ◽  
Decision Factors ◽  
Insight Into

Thermoelectrics, an energy-conversion technology, has been developed for its potential to support portable electronics with an innovative power source. Primarily focusing on the metropolitan market in Thailand, the study, thus, aimed at the market insight into portable electronics users’ characteristics and opinions of thermoelectric-generator (TEG) technology commercialization. The business research was conducted to analyze their behaviors for power-supply lacking problems, encountering heat or cold sources, purchasing decision for a TEG-based charger and key decision factors. For practical applications, an innovative TEG-based charger should be more flexible by harnessing various heat or cold sources from ambient situations to generate electrical power.

scholarly journals Social Acceptance of Aquaculture in Spain: An Instrument to Achieve Sustainability for Society

2020 ◽  
Vol 17 (18) ◽  
pp. 6628
Author(s):  
José Ruiz-Chico ◽  
José M. Biedma-Ferrer ◽  
Antonio R. Peña-Sánchez ◽  
Mercedes Jiménez-García
Keyword(s):  
Carrying Capacity ◽  
Social Acceptance ◽  
Point Of View ◽  
Saturation Point ◽  
Traditional Fishing ◽  
Further Development

Aquaculture is a technique to produce food that is under debate, due to its possible consequences for altering the economy, traditional fishing included, or the environment, even with doubts about the health of consumers. This document studies its social acceptance from the point of view of carrying capacity. This term is defined as the level at which this activity begins to be disproportionate and poses important disadvantages for society. In this context, we conducted 803 surveys in six coastal provinces in Spain. The results show that the acceptance of these products is good, implying that aquaculture is far from reaching its saturation point in society. Additionally, the respondents gave a higher priority to socio-economic objectives than to environmental ones. We can conclude that the further development of this sector is advisable in these provinces. The general perception of aquaculture is better among men, and also among higher-income consumers. Informative activities should be organized to target these more hesitant groups. Production structures should be revised to overcome biases in the population about the idea that the food obtained from aquaculture harms the environment or is less natural or healthy. The possible abuse of feed and chemicals spreads this idea, and this could affect the taste and quality adversely.

scholarly journals ЄВРАЗІЙСЬКИЙ ЕКОНОМІЧНИЙ СОЮЗ: ЄВРАЗІЙСЬКИЙ ЕКОНОМІЧНИЙ СОЮЗ: РОЗВИТОК ВЗАЄМНОЇ ТОРГІВЛІ ДЕРЖАВ-ЧЛЕНІВ

2020 ◽  
pp. 31-37
Author(s):  
М. П. Самоховец ◽  
Е. А. Гречишкина
Keyword(s):  
Point Of View ◽  
Positive Development ◽  
High Tech ◽  
Member States ◽  
Trade Relations ◽  
Mutual Trade ◽  
Leading Position ◽  
Macroeconomic Effect ◽  
Further Development ◽  
Industrial Demand

The study of mutual trade of the EAEU member states is relevant from the point of view of its improvement in order to achieve the macroeconomic effect of the EAEU creation. The purpose of the article is to study the economic indicators of mutual trade between the EAEU member states and to identify the main trends and prospects for trade relations development in the EAEU integration environment. The object of the study is trade relations between the EAEU member states. Methods used in the study. The study was conducted using official statistics of the EAEU for 2014–2018 and is based on economic comparisons and systematization. The development of cooperative ties within the EAEU, an extensive list of program and reporting documents was studied. Research hypothesis. Mutual trade of the EAEU member states has positive development trends. Statement of the main material. Significant changes in the dynamics of trade relations and their regulation in Belarus, Russia, Kazakhstan, Kyrgyzstan, Armenia are associated with the creation of the EAEU. The analysis of indicators of mutual trade between the EAEU member states showed that the Russian Federation occupies a leading position in mutual trade, and the Russian market is main market for goods from other EAEU member states. Trends indicate that the benefits of integration within the EAEU are not fully realized. Originality and practical value. Further development of EAEU trade relations is seen in the context of regional economic integration. Development on a cooperative basis will save the costs of the EAEU member countries and take advantage of the specialization of the countries. Conclusion. Intensification of mutual trade of the EAEU member states is possible by stimulating consumer and industrial demand, increasing the export of high-tech products and diversifying exports

scholarly journals SCHENGEN BORDERS CODE IN THE ASPECT OF BORDER SECURITY

2021 ◽  
Vol 6 ◽  
pp. 56-64
Author(s):  
Artūrs Gaveika
Keyword(s):  
International Crime ◽  
Point Of View ◽  
Border Security ◽  
Public Security ◽  
Foreign Law ◽  
The Face ◽  
Migration Crisis ◽  
Free Movement Of Persons ◽  
The Right ◽  
Further Development

Latvia has joined the Schengen area in 2007 and has already passed three Schengen evaluations. The aim of the article is to analyse the Schengen Borders Code in the context of border security.  Based on analysis of the Schengen Borders Code implementation in Latvia the author develops and puts forward suggestions on Schengen Borders Code content improvement as well as  its judicial systematisation development. The research tasks include the investigation of the current EU and national normative regulations, legal practices, the conclusions of Latvian and foreign law researchers by using analytical, historical and comparative methods.The improvement of the national normative regulation was started long before Latvia's accession to the Schengen area. In 2006, the Schengen Borders Code entered into force, which was revised due to the migration crisis in the Mediterranean region and adopted in 2016 in an improved version. The further development of the Schengen Borders Code is important from the point of view of the right to free movement of persons and from the point of view of ensuring public security in the face of today's challenges related to terrorism, international crime, uncontrolled migration and the spread of disease.The main achievement of the research is that the author has defined the main areas of Schengen Borders Code further development. 

scholarly journals Consequences of information covering the COVID-19 pandemic from the point of view of Terror Management Theory

2021 ◽  
Vol 273 ◽  
pp. 11012
Author(s):  
Polina Dmitrieva
Keyword(s):  
Information Technologies ◽  
Terror Management Theory ◽  
Terror Management ◽  
Point Of View ◽  
Management Theory ◽  
Social Phenomena ◽  
Psychological Phenomena ◽  
The Individual ◽  
Further Development ◽  
Information Coverage

The article is devoted to the description and explanation of individual psychological and social phenomena from the point of view of actualizing thanatic issues during the COVID-19 pandemic and its information coverage. The relevance of the study is due to the situation of the spread of coronavirus infection, the peculiarities of combating its spread, the influence of information technologies on this process and the need to understand the phenomena that have developed in society. The novelty of the research lies in the complex consideration of various social and individual psychological phenomena from the standpoint of the influence of the vital threat and existential fears on the individual and social consciousness. The article contains information on the socio-psychological phenomena that manifested themselves during the COVID-19 pandemic (alarmism, infodemic, intergroup tensions, stigmatization of certain groups of the population, a shift in political preferences, aggravation or emergence of mental disorders, inadequate purchasing activity) and describes them in terms of Terror Management Theory. In the conclusion, prospects are given for using the provisions of Terror Management Theory to develop a strategy for overcoming a pandemic situation, taking into account the action of proximal and distal defenses. The author comes to the conclusion that the features of the information coverage of the situation have a strong influence on its further development, in connection with which it is necessary to develop a clear plan for the preparation of official information that meets the criteria of completeness, credibility, scientific character and conveys the idea of positive realism.

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