Search results

The policy of strategic diagnostics in the modern economy of Russia's regions is built in a contradiction. The expected growth of the share of material production in GRP was not confirmed. Analysis of economic indicators allows stating the expected tendency in dynamics of development of tertiary spheres. A dominating element of structural changes of economy is consumer market.

Several methodological approaches to defining the category “consumer market” are distinguished: marketing, institutional, reproduction, and economic.

For formation of methodological foundations of evaluation of consumer market, several methodologies are systematized. A methodology including two stages of evaluation of development of consumer market is offered: diagnostics (first stage) and forecasting (second stage) of the region's consumer market.

According to evaluations obtained by the authors, a strategic factor of structural changes in Russia's economy is regions' consumer market. Its well-balanced development ensures acceleration of progressive structural changes in economy. A dominating factor in the structure of consumer market is trading sphere, and a tool of structural changes is trading the goods of local and domestic manufacturers.

The purpose of the chapter is to develop and substantiate the necessity for delegating authorities in the process of decision making in modern business systems, as well as conditions, principles, and criteria of successful delegation in view of the applied approach. The methodology of the chapter is based on the method of analysis of causal connections, which is used for determining the necessity and essence of delegation, evaluating and comparison of the possible concepts and means of its implementation in the process of decision making, and studying the managers' opinions for determining the problems of delegation. This allows determining the conditions and criteria of successful delegation and developing an optimal set of principles that allow for effective implementation of the process of delegating authorities. As a result, the authors determine conditions and limitations that determine the possibility of delegating authorities in the process of decision making and offer criteria of successfulness of the process: preliminary task setting, interest and readiness of employees, briefing, written form of delegating authorities for complex and responsible tasks, accessibility of any necessary information, support from manager, and controllability of the process and result. The concepts of delegation are studied, and priority of its new model is established. Based on this, 11 principles of successful delegation were formulated: determination of goal, certainty, parity of rights and responsibility, adequate support, motivation of effective solutions, participation, “finite character,” structural limitations, complex nature of tasks, succession, and vision of perspective.

Complexities of the process of delegation in the process of decision making in business systems are described – their knowledge helps developing own styles of delegation and improving it.

This paper is about how a command system allocated resources under profound uncertainty. The command system was the Soviet economy, the period was Stalin's dictatorship, and the resources were designated for military research & development. The context was formed by the limits of the existing aviation propulsion technology, the need to replace it with another, and uncertainty as to how to do so. We observe the formation of a quasi-market in which rival agents proposed projects and competed for funding to carry them out. We find rivalry and rent seeking, imperfectly regulated by principals. As rent seeking spread and uncertainty was reduced, the quasi-market was closed down and replaced by strict hierarchical allocation and monitoring. In theory, a dictator cannot commit to refrain from taxing the returns from today's effort tomorrow; therefore, we expect agents in a command system to seek only short-term returns from quasi-market activity. Agents’ willingness to invest in the Soviet quasi-market for inventions is ascribed to a reputation mechanism that enforced long-run returns.

In this paper, a new structure for the permanent magnet hysteresis synchronous (PMHS) motor is introduced. Moreover, this paper aims to presents a new analytical method for modeling of a disc-type PMHS motor.

Because the hysteresis and permanent magnet motors have unique characteristics, a motor (the PMHS motor) with excellent performance features can be achieved by combining them. Choosing a disc-type slotless structure causes the major advantages of both motors to be preserved in the new motor. To analyze PMHS motor, mathematical equations are obtained by using Ampere’s circuital law, flux continuity law and Faraday’s law. Then the air-gap voltage and exciting current of the motor can be calculated. To implement this method, a new iterative algorithm is proposed. This algorithm consists of one-iteration loop for each input voltage to find the maximum flux density of the operational hysteresis loop of the motor.

Validity of the analytical approach is confirmed by experimental results. A reasonably close agreement between the two is shown and some outstanding performances of the PMHS motor are demonstrated.

A new structure for PMHS motor and also a new analytical method for performance prediction of this motor is presented.

This study aims to address the issue of high-precision measurement of AC electric field. An electro-optical sensor with high sensitivity is proposed for this purpose.

The proposed sensor combines electromagnetic induction and fiber Bragg grating (FBG) sensing techniques. It is composed of a sensing probe, a piece or stack of piezoelectric ceramics (PZT) and an FBG. A signal processing circuit is designed to rectify and amplify the induced voltage. The processed signal is applied to the PZT and the deformation of PZT is detected by FBG. Theoretical calculation and simulation are conducted to verify the working principle of the probe. The sensor prototype is fabricated and its performance is tested.

The results of this study show that the sensor has good linearity and repeatability. The sensor sensitivity is 0.061 pm/Vm⁻¹ in the range from 250 to 17,500 V/m, enabling a measurement resolution of electric field strength of 16.3 V/m. The PZT stack is used to enhance the sensor sensitivity and the resolution can be improved up to 3.15 V/m.

A flexure hinge lever mechanism is used to amplify the deformation of PZT for further enhancement of sensitivity. The results show that the proposed sensor has high sensitivity and can be used for the accurate measurement of an electric field. The proposed sensor could have potential use for electric field measurement in the power industry.

The fight against corruption, which undermines the efficiency of the state apparatus and public confidence in public institutions, remains one of the critical present-day tasks. In this regard, the purpose of this study is to identify the available possibilities and real practice of law enforcement of the norms on investigative prevention, the practical significance of this institution and its potential.

The study investigated theoretical materials on criminological prevention, legislative norms and available law enforcement practice.

It was discovered that, in general, the available statutory regulation is insufficient for the full-fledged practical implementation of the potential of investigative prevention. An exception is specialised prevention, assigned as one of the main tasks to the Agency of the Republic of Kazakhstan for Combating Corruption. Proposals have been formulated to improve anti-corruption investigative prevention in other bodies of pre-trial investigation, considering the identified risks.

The uniqueness of the situation lies in the fact that the existence of the institution of investigative prevention, in fact, is limited to the post-Soviet space. The elimination of formalism in the approach to this method of crime prevention can contribute to greater efficiency in the fight against crime, including corruption.

The purpose of this paper is to develop a subgrid-scale (SGS) model for large eddy simulation (LES) of buoyancy- and thermally driven transitional and turbulent flows and further examine its performance.

Favre-filtered, non-dimensional LES equations are solved using non-dissipative, fully implicit, kinetic energy conserving, finite-volume algorithm which uses an iterative predictor-corrector approach based on pressure correction. Also, to develop a new SGS model which accounts for buoyancy, turbulent generation term in SGS viscosity is properly modified and enhanced by buoyancy production.

The proposed model has been successfully applied to turbulent Rayleigh–Bénard convection. The results show that the model is able to reproduce the complex physics of turbulent thermal convection. In comparison with the original wall-adapting local eddy-viscosity (WALE) and buoyancy-modified (BM) Smagorinsky models, turbulent diagnostics predicted by the new model are in better agreement with direct numerical simulation.

A BM variant of the WALE SGS model is newly developed and analyzed.

A new cutting tool is always well-defined and sharp at the onset of the metal cutting process and gradually losses these properties as the machining process advances. Similarly, at the beginning of the machining process, amplitude of tool vibrations is considerably low and it increases gradually and peaks at the end of the service period of the cutting tool while machining. It is significant to provide a corresponding real-time varying damping to control this chatter, which directly influences accuracy and quality of productivity. This paper aims to review the literature related to the application of smart fluid to control vibration in metal cutting and also focused on the challenges involved in the implementation of active control system during machining process.

Smart dampers, which are used as semi-active and active dampers in metal cutting, were reviewed and the research studies carried out in the field of the magnetorheological (MR) damper were concentrated. In smart materials, MR fluids possess some disadvantages because of their sedimentation of iron particles, leakage and slow response time. To overcome these drawbacks, new MR materials such as MR foam, MR elastomers, MR gels and MR plastomers have been recommended and suggested. This review intents to throw light into available literature which exclusively deals with controlling chatter in metal cutting with the help of MR damping methods.

Using an MR damper popularly known for its semi-active damping characteristics is very adaptable and flexible in controlling chatter by providing damping to real-time amplitudes of tool vibration. In the past, many researchers have attempted to implement MR damper in metal cutting to control vibration and were successful. Various methods with the help of MR fluid are illustrated.

A new cutting tool is always well-defined and sharp at the onset of metal cutting process and gradually losses these properties as the machining process advances. Similarly, at the beginning of the machining process, amplitude of tool vibrations is considerably low and it increases gradually and peaks at the end of service period of cutting tool while machining. Application of MR damper along with the working methodology in metal cutting is presented, challenges met are analyzed and a scope for development is reviewed.

This study provides corresponding real-time varying damping to control tool vibration which directly influences accuracy and quality of productivity. Using an MR damper popularly known for its semi-active damping characteristics is very adaptable and flexible in controlling chatter by providing damping to real-time amplitudes of tool vibration.

This study attempts to implement smart damper in metal cutting to control vibrations.

It is significant to provide corresponding real-time varying damping to control tool vibration which directly influences accuracy and quality of productivity.