Gravitational towing of asteroids by spacecrafts with a solar sail as a propulsion system

2020 ◽  
Author(s):  
R.M. Poluektov ◽  
M.V. Skrob
Keyword(s):  
Comparative Analysis ◽  
Solar Sail ◽  
Propulsion System ◽  
Joint Motion ◽  
Jet Engines ◽  
Low Thrust ◽  
Design Features ◽  
Long Period ◽  
The Impact

The paper considers the possibility of changing the orbit of potentially dangerous aste-roids using a gravity tractor. The concept of using spacecrafts equipped with a solar sail for gravitational towing is described. The analysis of this type spacecraft effectiveness is carried out on the example of changing the orbit of the Apophis asteroid. Software and mathematical support for modeling the joint motion of the asteroid-spacecraft system has been developed. The model was used to assess the impact of spacecraft with design features on the asteroid’s orbit over a long period of time. Several variants of the spacecraft configuration with different weight and sail design are considered. A comparative analysis of the results of using solar sail vehicles with similar vehicles using low-thrust jet engines is carried out.

Magnetic towing of asteroids using a spacecraft with a solar sail as a propulsion system

2020 ◽  
Author(s):  
R.M. Poluektov
Keyword(s):  
Gravitational Interaction ◽  
Solar Sail ◽  
Propulsion System ◽  
Joint Motion ◽  
Neodymium Magnet ◽  
Magnetic Attraction ◽  
Long Time

The paper considers the possibility of changing the orbit of potentially dangerous asteroids using the concept of a spacecraft — a magnetic tractor. The described concept is based on the use of a superconducting electromagnet mounted on a spacecraft and a permanent neodymium magnet attached to the surface of an asteroid. The principle of operation of this type of vehicle is similar to the concept of a spacecraft — a gravitational tractor, however, the considered vehicle, in addition to the force of mutual gravitational interaction, uses the force of magnetic attraction as a tug. A solar sail is used as a propulsion system for the type of vehicles under consideration. Within the framework of the work, the analysis of the effectiveness of the use of spacecraft of this type was carried out by modeling the joint motion of the asteroid — spacecraft system for a long time using the example of the change in the orbit of the asteroid Apophis.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

Corruption as “one‑stop‑shop”: theory and empirical analysis

2018 ◽  
pp. 32-51
Author(s):  
R. Yu. Kochnev ◽  
L. I. Polishchuk ◽  
A. Yu. Rubin
Keyword(s):  
Comparative Analysis ◽  
Business Environment ◽  
Enterprise Performance ◽  
Double Jeopardy ◽  
One Stop ◽  
The Commons ◽  
Public Production ◽  
Performance Project ◽  
The Impact ◽  
Sector Theory

We present the comparative analysis of the impact of centralized and decentralized corruption for private sector. Theory and empirical evidence point out to a “double jeopardy” of decentralized corruption which increases the burden of corruption upon private firms and weakens the incentives of bureaucracy to provide public production inputs, such as infrastructure. These outcomes are produced by simultaneous free-riding and the tragedy of the commons effects. The empirical part of the paper utilizes data of the Business Environment and Enterprise Performance project.

Assessment of small businesses activities in Ukraine

2019 ◽  
pp. 40-47
Author(s):  
Igor Ponomarenko ◽  
Kateryna Volovnenko
Keyword(s):  
Comparative Analysis ◽  
Statistical Analysis ◽  
Small Business ◽  
Small Businesses ◽  
Government Agencies ◽  
Small Enterprises ◽  
The Subject ◽  
Business Entities ◽  
The Impact ◽  
Micro Enterprises

The subject of the research is a set of approaches to the statistical analysis ofthe activities of small business entities in Ukraine, including micro-enterprises. The purpose of writing this article is to study of the features of functioningof small business entities in Ukraine. Methodology. The research methodology isto use a system-structural and comparative analysis (to study the change in thenumber of small enterprises by major components); monographic (when studyingmethods of statistical analysis of small businesses); economic analysis (when assessing the impact of small business entities on socio-economic phenomena andprocesses in Ukraine). The scientific novelty consists to determine the features ofthe functioning of small businesses in Ukraine in modern conditions. The influenceof the activities of the main socio-economic and political indicators on the activities of small enterprises in recent periods of time has been identified. It has beenestablished that there is flexibility in the development of strategies by small businesses in conditions of significant competition, which makes it possible to quicklyrespond to changing situations in specific markets. Conclusions. The use of acomprehensive statistical analysis of small businesses functioning in Ukraine willallow government agencies to develop a set of measures to optimize the activitiesof these enterprises, which ultimately will positively affect the strengthening oftheir competitiveness and will contribute to the growth of the national economicsystem.

Unemployment as an indicator of economic security in the employment sector: A regional dimension

2020 ◽  
Vol 16 (4) ◽  
pp. 715-729
Author(s):  
T.N. Savina
Keyword(s):  
Comparative Analysis ◽  
Age Groups ◽  
National Development ◽  
Federal District ◽  
Economic Security ◽  
Employment Policy ◽  
Multivariate Statistical ◽  
Band Theory ◽  
The Republic ◽  
The Impact

Subject. To achieve a high level of economic security is a key priority of national development. Employment reveals one of the most important aspects of social development of the individual that is associated with his or her needs satisfaction in the sphere of employment and is boon to economic security. Objectives. The purpose of the study is to show the impact of unemployment on economic security in employment. Methods. I apply such scientific methods as dialectical, historical and logical unity, structural and functional analysis, traditional techniques of economic analysis and synthesis. The methods of multivariate statistical and comparative analysis serve as a methodological basis of the study. To determine the indicator of unemployment, I use the band theory. Results. I underpin the growing role of employment in ensuring economic security. The paper presents a comprehensive assessment of the unemployment status and a comparative analysis of the indicator in the Republic of Mordovia, the Volga Federal District, and the Russian Federation as a whole. I identify trends in the average duration of unemployment, show the distribution of unemployed by level of education and age groups. Conclusions. The average annual unemployment rate in the Republic of Mordovia is lower than in Russia and the Volga Federal District. The findings may be useful for public authorities to substantiate their employment policy at both macro- and meso-levels, for designing programs and strategies for socio-economic development of regions and the social security doctrine, as well as in practical activities of employment services.

Directions of Accounting Environmental Factors for Forecasting Formation of Agroecosystems

2020 ◽  
pp. 31-35
Author(s):  
L.Z. Khalishkhova ◽  
◽  
A. Kh. Temrokova ◽  
I.R. Guchapsheva ◽  
K.A. Bogаtyreva ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Comparative Analysis ◽  
Environmental Factors ◽  
Environmental Safety ◽  
Logical Analysis ◽  
Management Decisions ◽  
The Sustainable Development ◽  
The Impact

Ensuring the sustainable development of agroecosystems requires research into the justification of the impact of environmental factors on the formation of territorial agroecosystems and identifies ways to take them into account in order to justify management decisions and ensure environmental safety. The main goal of the research within the article is to identify the most significant environmental factors in predicting the formation of agroecosystems. Provisions are devoted to the study of the laws governing the functioning of agroecosystems in order to increase their stability. The methods of comparative analysis, generalization, abstraction, logical analysis are applied. A number of provisions are formulated regarding ways to account for the influence of factors on the formation of key elements of agroecosystems.

Features and tendencies of budgetary provision of Zaporizhzhya region development in the conditions of budget decentralization

2019 ◽  
pp. 88-97
Author(s):  
Iryna Storonyanska ◽  
Liliya Benovska
Keyword(s):  
Comparative Analysis ◽  
Regional Development ◽  
State Budget ◽  
Regional Center ◽  
The Social ◽  
Graphical Visualization ◽  
Social And Economic Development ◽  
Decentralization Reform ◽  
Regional Development Strategies ◽  
The Impact

The purpose of the article is to study trends and identify problems of budgetary provision of the development of Zaporizhzhia region in the context of budgetary decentralization reform. Methods of systematic and comparative analysis, graphical visualization, generalization and statistical methods were used for the study. The article examines the impact of decentralization reform on the financial provision of social and economic development of administrative and territorial units of Zaporizhzhia region. The comparative analysis of the budgetary provision of the development of Zaporizhzhya region and other regions of the Central region is conducted. The article describes the trends and problems of Zaporizhzhya region development. The following positive trends were revealed: increase of revenues to local budgets of the region; reduction of transfer dependence of the region on the state budget; formation of high-taxation CTCs. The negative tendencies of development were: increase of differentiation of financial provision of the development of the regional center and other administrative and territorial units, reduction of the growth rate of revenues to the development budget of Zaporizhzhia region. Attention is drawn to the fact that under the conditions of decentralization reform and administrative and territorial reform, consolidated territorial communities are actively being formed in the Zaporizhzhya region, most of them with high financial capacity, which testifies to the high potential of regional development. The article analyzes the regional target programs of Zaporizhzhia region and clarifies the possibilities of their integration with the Action Plans for implementation of the Regional Development Strategies. The dominance of the social component over the development of regional target programs and low level of implementation of a number of programs are emphasized.

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