515 research outputs found

    Graduate Lecture Recital: Inna Vishnevskaya

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    Decentralization of minimum wage setting in Russia: Causes and consequences

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    [Final remarks] Our findings suggest that the decentralization reform of the MW setting mechanism accelerated the growth of the wage floor for Russian workers and narrowed the variation in the minima between regions. At the same time, the coexistence of the federal and regional minimum wages has led to new imbalances. All these mean that the reform of the minimum wage setting mechanism in Russia cannot be considered final and further steps are required for better functioning of this institute

    Aerodynamic Analysis of Low Speed Wing Design using Taguchi L9 Orthogonal Array

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    The study of aerodynamics has been preoccupied with understanding flight at increasing speeds and ultimately supersonic. Today, this pursuit has advanced the science for both Hypersonic and Transonic flight to near Mach 1 supporting economical commercial flight operations. This research presents the data from a Taguchi array on low speed with twin wing designs to establish the design parameters for their use in low speed and high altitude. Also presented is how aerodynamic advantages can be achieved through understanding the interactions of parameters and their use. This is compared to operational effectiveness when applied to remotely piloted aircraft that are not constrained by direct requirements. The research concludes with suggestions for improved designs and further work that may enable higher altitudes with low speeds

    Twin-Wing Design Options Used for Unmanned Aerial Vehicles to Achieve High Altitudes at Low Speeds

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    The paper addresses the aerodynamic performance of twin‐wing aircraft (biplanes) that are remotely piloted. While twin wing aircraft are acknowledged as to having greater maneuverability than monoplanes, they have inherent disadvantages based on the set position of the upper wing to meet piloting needs which induces significant levels of drag from the struts that link the upper and lower wings together. In this research, the aerodynamics of the wing position in relationship to the lower wing are analyzed with Computational Fluid Mechanics/Dynamics and simulation models. It will show that modern material can eliminate the strut drag and allow for greater lift at lower speeds. This proposed design is capable of achieving much higher altitudes with low speeds to offer advanced applications for Unmanned Aerial Vehicles, UAVs

    Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: the Polish reference

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    The radiolarian species Astroentactinia paronae, A. stellata, Trilonche echinata, T. grandis, T. nigra, Haplentactinia inaudita, and H. rhinophyuosa are common in late Frasnian to early Famennian rhythmic, calcareous−marly sequence of the southern Holy Cross Mts., Poland. They are known also from coeval abundant siliceous biota assemblages from the carbonate shelf of East European Platform including more than 150 taxa of radiolarians. However, in ecological terms, the moderately diverse Polish microfaunas (34 species of 12 genera) are more similar to these from Kolyma and Alaska, also marked by abundance of sphaerical entactiniids and near-absence of bilateral−symmetric Ceratoikiscidae and Palaeoscenididae. A succession of two distinctive siliceous sponges associations is established in the incipiently submerged Holy Cross carbonate platform: from an ephemeral, diverse, mostly rigid−skeletal lithistid−hexactinosan foreslope assemblage (initial phase of the late Frasnian Kellwasser Crisis), to long−lasting, basinal loose−skeletal hexactinellid−demosponge faunas (appearing abundantly just prior the Frasnian–Famennian boundary in the late Palmatolepis linguiformis Zone). Such regional blooms of marine siliceous biotas, parallel to temporary retreat of calcareous biota, are demonstrated worldwide for the Kellwasser Crisis. These suggest probable causal links with cooling pulses and at least regional, volcanically induced eutrophication

    Artificial Intelligence in the Aviation Manufacturing Process for Complex Assemblies and Components

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    Aviation manufacturing is at the leading edge of technology with materials, designs and processes where automation is not only integral; but complex systems require more advanced systems to produce and verify processes. Critical Infrastructure theory is now used to protect systems and equipment from external software infections and cybersecurity techniques add an extra layer of protection. In this research, it is argued that Artificial Intelligence can reduce these risks and allow complex processes to be less exposed to the threat of external problems, internal errors or mistakes in operation

    Tourist business in turbulence

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    The article deals with the factors of turbulence which engulfed the tourism industry with a «whirling flood». The main causes of the impact on the tourist market are: devaluation of the rouble, the bankruptcy of the largest tour operators and Transaero Airlines, the sanctions of the West, the introduction of fingerprinting for Russian tourists, as well as the causes of non-economic nature. In the "new reality" there is an objective need to develop some new management strategies that take into account the likelihood of unexpected fluctuation
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