Dynamic model of efficient allocation of water with three sources of water supply (groundwater, surface water and the recycling technology with limited capacity) is constructed and analyzed. It is shown that in case of binding capacity constraint we can abandon the use of groundwater at some moment and then revert to it some time in future. Efficient path could be decentralized under suitable water tariffs. Comparative analyses of water tariffs for the two users that differ only in terms of the availability of recycling technology are undertaken.
The authors of the article analyse reasons and conditions for usage of value capture scheme for financing urban transport system development. The results of the systematization of researches of public transport development impact on land and property values are discussed. The mechanisms of value capture are classified and discusses with the examples of best practices realized in cities in foreign countries.
The article examines different intermodal transportation systems in modern supply chains. The specific features of the intermodal transportation system with the series-parallel delivery scheme using the intermediate terminal are analyzed. The ratio of the road and rail volumes can be operatively varied in this type of system depending on the customers’ needs and the transport market situation. The intermediate terminal can be used for warehousing of the commodities transported. A mathematical model is developed in order to evaluate the parameters of the system. The example of application of the model is presented
In the article, there have been presented the results of assessment of working conditions' impact on workers of a vessel metal hulls assembly shop of a machine building plant on levels of morbidity with temporal disability (MTD). The assessment of the working conditions has been made according to the results of the assessment of workplaces, the levels of MTD on the ground of the longterm average annual indices for 2005-2014. The cause-and-effect relations between the working conditions and the MTD levels have been established by means of a comparison of the working conditions' classes according to the results of the workplaces' assessment and the MTD levels characterizing the impact of harmful factors on the most vulnerable human body organs and systems. According to the study results, it has been established that the MTD levels of the respiratory viral infections, diseases of the respiratory organs, diseases of the locomotor system and connective tissue, diseases of the genitourinary system were statistically significantly connected with the effect of low air temperatures, high concentrations of harmful chemical substances in the working zone air, high levels of local vibration and high labor burden.
Article presents the idea, that if the demand on a product can be described with high-elasticity of price, decrease in price can determine an increase in total revenue, but not necessary – in total margin (profitability). From one side the overstated prices on the product will decrease the intensity of its sales, from another side – will decrease the return on working capital, which is used for wholesale purchasing. Also it will increase risks of expiration period exceeding in retail network. Article considers questions of rational price setting and increase in efficiency of working capital employment for trade company.
The paper presents a brief introduction to the air traffic flow management problem, describes main terms, rules and also describes the main approaches for solving the problem. Author describes how flow management systems work in Europe, USA and in the Russian Federation. Author proposes a fast greedy algorithm for solving flow management problem defined in dynamic deterministic statement