FORMULATION OF THE PROBLEM OF PLANNING AIRCRAFT ROUTES WHEN SERVICING A RANDOM FLOW OF APPLICATIONS ARRIVING IN FLIGHT

2021 ◽  
pp. 17-27
Author(s):  
V. I. Goncharenko ◽  
G. N. Lebedev ◽  
D. S. Маrtunkevich ◽  
A. V. Rumakina
Keyword(s):  
Supply And Demand ◽  
Necessary Condition ◽  
Flight Altitude ◽  
Idle Mode ◽  
Average Speed ◽  
Poisson Law ◽  
Random Flow ◽  
Regular Mode ◽  
Destination Point

The work is about process of ground facilities servicing by aircrafts group when receiving requests during the flight. In case of manned aircraft, servicing of one request refers to the flight from the point to another one. As for unmanned aircrafts, it is necessary to observe reached destination point at the specified speed and flight altitude. It is assumed that the distance between the points and the moments of requests appearing ranked by the Poisson law. Necessary condition of successful task solving is that the average service speed of the requests flow exceeds the average speed of their receipt. It was found that taking into account the randomness of requests, three flight situations are possible – the “idle” mode in service when the requests number is less than the number of unoccupied aircraft, the regular mode when the balance of supply and demand and the “peak” mode when the requests number is increased and there is a queue in service.

MEAT PROCESSING INDUSTRY OF UKRAINE: TENDENCIES AND PROSPECTS

2021 ◽  
Vol 40 (4) ◽  
pp. 16-25
Author(s):  
VLASENKO Iryna ◽  
SEMKO Tetiana
Keyword(s):  
Supply And Demand ◽  
Poultry Meat ◽  
Necessary Condition ◽  
Meat Production ◽  
Meat Industry ◽  
Total Production ◽  
Meat Processing ◽  
Resource Saving ◽  
Investment Activity ◽  
Processing Industry

Background. The total production of beef and pork is declining from year to year. The study of development trends in the meat industry of Ukraine will help to outline the prospects for the successful realization of potential opportunities for production expansion. An analysis of recent research and publications has shown that despite some scientific developments, dynamic changes in the meat processing industry require constant monitoring of unresolved issues. The aim of the study is to analyze the current state and characteristics of the meat processing industry of Ukraine on the basis of analytical research in general and in the context of its innovation activities in particular. Materials and methods. Research methods were used: monographic, statistical groupings, correlation-regression analysis, graphical. Results. Analysis of the dynamics of industrial meat production shows that beef and veal occupy the least share in it. The basis for ensuring the economic balance of production and economic relations of economic entities is the consistency of supply and demand for raw meat and products of its processing. For the successful development of the industry, the state must protect and stimulate domestic producers; to harmonize domestic standards of safety and quality of products in accordance with international ones. The innovative development of the meat market requires adequate investment support, and the stimulation of investment activity should be considered in the context of the strategy of development of the national economy on an innovative basis. Conclusion. Livestock production in general and meat in particular are one of the leading sectors of agriculture. In recentyears, there have been some trends in the dynamics and structure of meat production and consumption in favor of cheaper poultry meat. The reason for this is the reduction in production; increase in retail prices for all types of products; low incomes of the majority of the population. A necessary condition for the sustainable development of the meat processing industry is the introduction of European regulations on product quality and safety standards; introduction of resource-saving technologies at enterprises; reconstruction of enterprises; provision of production facilities with domestic raw materials.

scholarly journals Inequities in curative health-care utilization among the adult population (20–59 years) in India: A comparative analysis of NSS 71st (2014) and 75th (2017–18) rounds

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241994
Author(s):  
Shreya Banerjee ◽  
Indrani Roy Chowdhury
Keyword(s):  
Health Care ◽  
Health Care Utilization ◽  
Economic Status ◽  
Adult Population ◽  
Supply And Demand ◽  
Strong Association ◽  
Sample Survey ◽  
Necessary Condition ◽  
Care Utilization ◽  
Socio Economic Status

Objective The study attempts (a) to compute the degree of socio-economic inequity in health care utilization and (b) to decompose and analyze the drivers of socio-economic inequity in health care utilization among adults (20–59 years) in India during the periods 2014 and 2017–18. Data source The analysis has been done by using the unit level data of Social Consumption: Health (Schedule number 25.0), of National sample Survey (NSS), corresponding to the 71st and 75th rounds. Methods Odds ratios were computed through logistic regression analysis to examine the effect of the socio-economic status on the health seeking behaviour of the ailing adult population in India. Concentration Indices (CIs) were calculated to quantify the magnitude of socio-economic inequity in health care utilization. Further, the CIs were decomposed to find out the share of the major contributory factors in the overall inequity. Results The regression results revealed that socio-economic status continues to show a strong association with treatment seeking behavior among the adults in India. The positive estimates of CIs across both the rounds of NSS suggested that health care utilization among the adults continues to be concentrated within the higher socio-economic status, although the magnitude of inequity in health care utilization has shrunk from 0.0336 in 2014 to 0.0230 in 2017–18. However, the relative contribution of poor economic status to the overall explained inequities in health care utilisation observed a rise in its share from 31% in 2014 to 45% in 2017–18. Conclusion To reduce inequities in health care utilization, policies should address issues related to both supply and demand sides. Revamping the public health infrastructure is the foremost necessary condition from the supply side to ensure equitable health care access to the poor. Therefore, it is warranted that India ramps up investments and raises the budgetary allocation in the health care infrastructure and human resources, much beyond the current spending of 1.28% of its GDP as public expenditure on health. Further, to reduce the existing socio-economic inequities from the demand side, there is an urgent need to strengthen the redistributive mechanisms by tightening the various social security networks through efficient targeting and broadening the outreach capacity to the vulnerable and marginalized sections of the population.

Control of Flight Altitude of a Small Flapping Robot by Wing Flapping Frequencies

2011 ◽  
Author(s):  
Tadatsugu Imura ◽  
Masaki Fuchiwaki ◽  
Kazuhiro Tanaka
Keyword(s):  
Vertical Velocity ◽  
Large Body ◽  
The Body ◽  
Necessary Condition ◽  
Flight Altitude ◽  
Body Angle ◽  
Flight Velocity ◽  
Wing Motion ◽  
Frequency Changes ◽  
Flying Robot

The purpose of this paper is clarifying the effect of wing motion for the flight of small flying robot without having tail wing. Specifically, we measured the body angle and flight velocity of flying small flying robot at different flapping frequency in range from 7.5 [Hz] to 10.5 [Hz], and clarified the effect of body angle for flight velocity in flights as flapping frequency changes. The small flying robot has large body angle in flight at high flapping frequency. The spatial vertical velocity increases because the body angle increases linearly despite of little change of flight velocity from viewpoint of robot as increasing flapping frequency. Moreover, for this flying robot, flying at larger body angle than body angle of 16 [deg.] is necessary condition for increasing spatial vertical velocity as flapping frequency changes. It indicates that the flight altitude of micro flapping robot is controllable by its flapping frequency.

The Infancy of Solar-Type Stars and its Relevance for the Origin of Life

1997 ◽  
Vol 161 ◽  
pp. 267-282 ◽  
Author(s):  
Thierry Montmerle
Keyword(s):  
Main Sequence ◽  
Solar Nebula ◽  
Circumstellar Disks ◽  
T Tauri Stars ◽  
Necessary Condition ◽  
Sequence Evolution ◽  
T Tauri ◽  
Solar Type ◽  
Optical Domain ◽  
The Origin Of Life

AbstractFor life to develop, planets are a necessary condition. Likewise, for planets to form, stars must be surrounded by circumstellar disks, at least some time during their pre-main sequence evolution. Much progress has been made recently in the study of young solar-like stars. In the optical domain, these stars are known as «T Tauri stars». A significant number show IR excess, and other phenomena indirectly suggesting the presence of circumstellar disks. The current wisdom is that there is an evolutionary sequence from protostars to T Tauri stars. This sequence is characterized by the initial presence of disks, with lifetimes ~ 1-10 Myr after the intial collapse of a dense envelope having given birth to a star. While they are present, about 30% of the disks have masses larger than the minimum solar nebula. Their disappearance may correspond to the growth of dust grains, followed by planetesimal and planet formation, but this is not yet demonstrated.

Universal ESEM

1993 ◽  
Vol 51 ◽  
pp. 786-787
Author(s):  
G.D. Danilatos
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Vacuum ◽  
Natural Extension ◽  
Necessary Condition ◽  
Environmental Scanning ◽  
Detection Systems ◽  
Small Gain ◽  
Detection Medium ◽  
Scanning Electron

The environmental scanning electron microscope (ESEM) has evolved as the natural extension of the scanning electron microscope (SEM), both historically and technologically. ESEM allows the introduction of a gaseous environment in the specimen chamber, whereas SEM operates in vacuum. One of the detection systems in ESEM, namely, the gaseous detection device (GDD) is based on the presence of gas as a detection medium. This might be interpreted as a necessary condition for the ESEM to remain operational and, hence, one might have to change instruments for operation at low or high vacuum. Initially, we may maintain the presence of a conventional secondary electron (E-T) detector in a "stand-by" position to switch on when the vacuum becomes satisfactory for its operation. However, the "rough" or "low vacuum" range of pressure may still be considered as inaccessible by both the GDD and the E-T detector, because the former has presumably very small gain and the latter still breaks down.

Subtle Impact of Akt1 and Akt3 on Exploratory Behavior in Gene Targeted Mice

2015 ◽  
Vol 223 (3) ◽  
pp. 173-180 ◽  
Author(s):  
Christina Leibrock ◽  
Michael Hierlmeier ◽  
Undine E. Lang ◽  
Florian Lang
Keyword(s):  
Forced Swimming Test ◽  
Open Field Test ◽  
Wild Type ◽  
Average Speed ◽  
Closed Area ◽  
Light Area ◽  
Swimming Test ◽  
The Impact ◽  
Center Area ◽  
Dark Transition

Abstract. The present study explored the impact of Akt1 and Akt3 on behavior. Akt1 (akt1-/-) and Akt3 (akt3-/-) knockout mice were compared to wild type (wt) mice. The akt1-/- mice, akt3-/- mice, and wt mice were similar in most parameters of the open-field test. However, the distance traveled in the center area was slightly but significantly less in akt3-/- mice than in wt mice. In the light/dark transition test akt1-/- mice had significantly lower values than wt mice and akt3-/- mice for distance traveled, number of rearings, rearing time in the light area, as well as time spent and distance traveled in the entrance area. They were significantly different from akt3-/- mice in the distance traveled, visits, number of rearings, rearing time in the light area, as well as time spent, distance traveled, number of rearings, and rearing time in the entrance area. In the O-maze the time spent, and the visits to open arms, as well as the number of protected and unprotected headdips were significantly less in akt1-/- mice than in wt mice, whereas the time spent in closed arms was significantly more in akt1-/- mice than in wt mice. Protected and unprotected headdips were significantly less in akt3-/- mice than in wt mice. In closed area, akt3-/- mice traveled a significantly larger distance at larger average speed than akt1-/- mice. No differences were observed between akt1-/- mice, akt3-/- mice and wt-type mice in the time of floating during the forced swimming test. In conclusion, akt1-/- mice and less so akt3-/ mice display subtle changes in behavior.

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