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  • Author: Maciej Kamiński x
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The Theoretical Model of Polish Housing Policy between 2002 and 2016

Abstract

Research background: This paper attempts to introduce the concept of Polish housing policy and define its course.

Purpose: The main aim of the paper is to attribute the theoretical model of Polish housing policy and its goals and summarize the practical instruments and programs implemented between 2002 and 2016 to try to answer the question in what way the state was helping households to fulfil housing needs.

Research methodology: The research method used in the paper was a query of Polish and foreign literature of housing policy models, goals and instruments in the theoretical part, in the practical part (main research) is the monograph analysis of Polish housing policy between 2002 and 2016 including: housing resource, housing supply and change of their structure in the examined timeline, availability of apartments, supply of mortgages and connections with the availability of apartments and macroeconomic situation measured by the yearly GDP per capita.

Results: Theoretical and practical solutions were made. Polish housing policy can be defined as a wide ranging selective model according to Ghekiere (2009) division, the empirical analysis of the adopted solutions risks – marginalization of social housing and substantial impact of the financial sector (banking and mortgages) on housing which may be negative in the case of an economic crisis.

Novelty: The value of this paper is a contribution to the debate on defining a theoretical model of housing policy and an explanation of the changes in housing in Poland from 2002–2016.

Open access
Structure of a Flax Threshing Mass Device

Abstract

The object of the research consisted of a roller threshing unit with a profile elastic working surface of a parabolic type and a triangle one with rollers which turn concurrently with various angular speeds. Two rollers with 150 and 300 mm were investigated. The process of seeds separation from the threshing mass took place at its moisture of 10 to 35%. The relation of mixtures in the straw mass in a mass relation was changing within 10 to 35% with the length of stalks from 20 to 400 mm. The amount of the material provided for threshing was varied from 0.27 to 0.52 kg∙s-1∙m-1 and the slot between the rollers from 1.0 to 6.0 mm. The width of the base of notches located on the working surface of drums was within 25 to 150 mm, the height of notches on rollers was within 10 to 60 mm. Kinematic conditions of rollers operation were within 1.0 to 1.5. As a result of the research it was determined that a parabola is the optimal form of the profiled surface of rollers in a cross section. It ensures more effective seeds separation than a triangle configuration of drums. This conclusion is also confirmed by a theoretical discussion and is explained with the fact that the parabolic form of notches has a bigger surface than the triangle one and that they affect more seed-bags which leads to the increase of the seeds separation degree. The laboratory research allowed determination of rational ranges of parameters changes during flax mass threshing.

Open access
Threshing and Grain Separating Mechanism with Differentiate Concave for Intensification of Threshing and Grain Separation

Abstract

The objective of the paper was intensification of the process of threshing and grain separation by a rasp-bar threshing mechanism of a combine harvester with a differentiate concave; substantiation of a regular-style design and differentiate concave parameters as well as threshing and separating mechanism operation modes. Theoretical research has been conducted based on laws of motion, experimental investigation – in accordance with methods devised on the basis of conventional methodologies. Standard computing methods as well as Microsoft Excel and Mathcad application packages have been used for processing experimental data. Measuring and recording equipment has been used in the research process. Experimental investigation has been carried out on specially devised experimental assemblies. The research has enabled: to substantiate the design-manufacturing process of the threshing and separating mechanism with a differentiate concave; to establish analytical dependencies to determine the area of typical influence zones of a threshing drum and concave on threshing mass; to ascertain the regularity of stem deformation under the influence of different forces regulated by changing the distance between concave transverse slats; to figure out the regression equation enabling finding optimal process variables for a threshing and separating mechanism with a differentiate concave. The scientific novelty of the engineering solutions is confirmed by a patent of the Republic of Belarus for the utility model № 6335 « Tresking mechanism». The results of theoretical and experimental research have been used in developing design documentation for the production of a differentiate concave for combine harvesters PA «Gomselmash».

Open access
Cutting of Woody Shrubs at Melioration Objects by a Multi-Rotor Mower With Trapezoidal Knives

Abstract

The object of the research is a technological process and technical means of cutting woody shrubs at melioration objects. The subject of the research consists of regularities and methods of execution of the process of cutting woody shrubs at melioration objects by a multirotor mower with trapezoidal knives. The aim of the research is to increase efficiency of cutting shrubs at melioration objects by applying a multi-rotor mower with trapezoidal knives. We have obtained analy tical dependences in order to determine the angle of diversion of a knife from the radial position during contact with the stem, and to calculate the reaction in the joint “knife-fixing bolt” depending on the parameters of a knife and rotor, and the distance from the centre of the knife fixing bolt to the point of contact of a knife and stem, which provides minimal impact load on the knife fixing bolt during cutting woody shrubs. We have also developed a mathematical model of the process of cutting shrubs by a multi-rotor mover with trapezoidal knives, and methods of determination of the main parameters and regimes of work of the mower cutting apparatus for cutting shrubs at melioration objects, which contain a monogram, based on the use of theoretical-experimental dependences.

Open access
The Analysis of the State Space of Management Process in the Industry Applying Expert Systems

Abstract

The article includes analysis of expert system application possibilities in the environment of production processes control. Such concepts as artificial intelligence, expert system, intellectual factor, state space were used. The object of the research consisted of the mechanism of controlling an enterprise (manager). These mechanisms were analysed from the point of view of state space. The graph method was used to visualize information presentation. Analysis of control processes of an enterprise was carried out by determination of their state space. The concept of state space itself is completed with numerous measurement values (parameters) under influence of which the process of task solution takes place. Moreover, the concept of static and dynamic elements of state space of the control system is applied. It was shown that dynamic elements enable the quality presentation of space, which without including other restrictions leads to extension of its impact, which confirms that a given system has an intelligent factor.

Open access
Trends in Improving the Structure of a Rotary Dryer

Abstract

The article presents rational principles for improving the structure of a flax heap drier. As a result of tests which were carried out, we established that the counter-flow rotary dryer SKM-1 is the most perspective for drying flax heap. For effective drying of the flax heap fine fraction the second rotating screen above the loaded layer of flax heap is suggested in the SKM-1 dryer. Consequently, the drying agent processed on the bottom screen is used for preliminary drying and removal of surface moisture of the material loaded on the top screen. For the purpose of maintaining the uniform drying of the material it is recommended to carry out loosening and hashing during the drying process with the help of the loosening device, established as the V-shaped device on the discharge unit on the way to a mill. The preliminary heating of the flax heap on the top screen essentially accelerates drying and allows the increase of the dryer performance and can minimize energy requirement for drying. The correctly selected modes of the drying process provide favorable conditions for ripening flax seed, avoid damage of drying material and improve its sowing quality.

Open access
Estimation of the propagation direction and spectral properties of the EEG signals registered during sevoflurane anaesthesia using Directed Transfer Function method

Estimation of the propagation direction and spectral properties of the EEG signals registered during sevoflurane anaesthesia using Directed Transfer Function method

The aim of this study was to estimate spectral properties and propagation of the EEG signals registered during sevoflurane anaesthesia between individual EEG recording channels. The intensities of activity flows were calculated for delta, theta, alpha and beta waves using the Directed Transfer Function integration procedure. It was found that delta waves played the dominant role in the EEG signal propagation during anesthesia and it was suggested that theta and alpha waves propagation could be related to the processes participating in the wakefulness control. Data obtained with DTF method were compared with data received from the analysis of cerebral blood flow with the use of PET in other laboratory. This study showed that analysis of the EEG signal propagation is useful for better understanding and thus safer induction of anaesthesia procedure.

Open access
Determination of Optimal Geometric Parameters of the Windshield Device Limiting the Spray Drift by Wind in Herbicides Spraying

Abstract

The objective of the paper is to determine the optimal geometric parameters of the windshield device limiting the spray drift by wind in herbicides spraying. Tests were carried out with the use of the planning methods of experiments and statistical methods of processing of the obtained results. The result of the research consisted in obtaining structural parameters of the windshield made in the shape of gratings with rectangular boards. It was found out that this device may be used at the wind speed exceeding agrotechnological sizes. The research results will be used in the work on devices protecting against wind at a precise herbicides spraying.

Open access