One of the main human goals is to achieve the state of happiness. Almost all people ask themselves the question of how to attain this goal. For thousands of years, philosophers and spiritual leaders and, nowadays, researchers representing various disciplines of social sciences, have been searching for the right answer to this question. One of the dilemmas intertwined in the debate about the essence of happiness relates to the tension expressed by the question “to be or to have”; the tension between the spiritual and the material world; between sacrum and profanum. Can accumulation of money and material possessions make us happy? Starting with the message passed on by a German psychoanalyst Erich Fromm in his essay “To Have or to Be” and the wisdom derived from the classic philosophical and religious works, I will attempt to define the relation between the state of happiness and the attachment to money and possessions or the attachment to social and transcendent values. This difficult, yet crucial, problem will be analyzed in the context of the current psychological knowledge related to the emotional and cognitive consequences of taking a materialistic approach to life. Erich Fromm and other thinkers who had lived hundreds of years before him, suggested that greed and pursuit of material possessions did not appease the human longing for happiness. The latest experimental research, conducted by psychologists, economists and scholars representing other disciplines of science, seem to strongly confirm these assumptions.
The article is an attempt to collate and present the existing works of Polish geographers who focused on public space in cities, taking two main theoretical and methodological approaches – objective and subjective – under consideration. The article discusses different definitions of the analysed term in an interdisciplinary context as well as indicates main aspects and research directions in geographical studies along with the scholars representing them. Moreover, the authors make an attempt to evaluate the existing state of the art and try to set future perspectives for geographical studies on public space in cities. The article finishes with the authors’ conclusions regarding the necessity to continue the research on public space and the role Polish geographers shall play in it.
The general aim of the paper is to indicate the key role played by banks in Schumpeterian innovative evolution. It includes formal modelling of innovative evolution of financial subsystem of an economy which goes beyond routine behavior of banks deprived of innovative, financial strategies. Moreover this paper studies an impact of innovations in financial sphere of modified Debreu monetary economy on its real sector and, specifically, on social welfare. Thus the paper main aims are to prove that pro-innovative banks may intensify innovative evolution and to specify the sufficient conditions to guarantee the preservation of the rules of circular flow for a consumption sector within the innovative changes in banks behavior.
This research work is focused on examining the turning behavior of Incoloy 800H superalloy by varying important cutting parameters. Incoloy 800H is an Iron- Nickel-Chromium based superalloy; it can withstand high temperature (810°C), high oxidization and corrosion resistance. But, it is difficult to turn in conventional machines and hence the present work was carried out and investigated. Experiments were conducted based on the standard L27 orthogonal array using uncoated tungsten inserts. The cutting force components, namely, feed force (Fx), thrust force (Fy) and cutting force (Fz); surface roughness (Ra) and specific cutting pressure (SCPR) were measured as responses and optimized using Taguchi-Grey approach. The main effects plots and analysis of mean (ANOM) were performed to check the effect of turning parameters and their significance on responses of cutting forces in all the direction (FX, FY, FZ), the surface roughness (Ra) and specific cutting pressure (SCPR). The tool wear and machined surfaces were also investigated using white light interferometer and SEM.
Pressure pulsations occurring in volumetric compressors manifold are still one of the most important problems in design and operation of compressor plants. The resulting vibrations may cause fatigue cracks and noise. Accuracy of the contemporary method is not sufficient in many cases. The methods for calculating pressure pulsation propagation in volumetric compressors manifolds are based on one-dimensional models. In one-dimensional models, the assumption is made that any installation element may be simplified and modeled as a straight pipe with given diameter and length or as a lumped volume. This simplification is usually sufficient in the case of small elements and long waves. In general, the geometry of the element shall be also considered. This may be done using two ways: experimental measurements of pressure pulsations, which lead to transmittance approximation for the investigated element, or CFD analysis and simulation for the acoustic manifold element. In this paper, a new method based on Computational Fluid Dynamics (CFD) simulation is presented. The main idea is to use CFD simulation instead of experimental measurements. The impulse flow excitation is introduced as a source. The results of simulation are averaged in the inlet and outlet cross sections, so time only dependent functions at the inlet and outlet of the simulated element are determined. The transmittances of special form are introduced. On the basis of introduced transmittances, the generalized four pole matrix elements and impedance matrix elements may be calculated. The method has been verified on the basis of experimental measurements.
The performance of majority engineering systems made of composite laminates can be improved by increasing strength to weight ratio. Variable thickness approach (VTA), in discrete form, used in this study is capable of finding minimum laminate thickness in one stage only, instead of two stage methodology defined by other researchers, with substantial accuracy for the given load conditions. This minimum required laminate thickness can be used by designers in multiple ways. Current study reveals that effectiveness of VTA in this regard depends on ply thickness increment value and number of plies. Maximum Stress theory, Tsai Wu theory and Tsai Hill theory are used as constraints, while ply angles, ply thicknesses and number of plies in discrete form are used as design variables in current simulation studies. Optimization is carried out using direct value coded genetic algorithm. The effect of design variables such as ply angles, ply thicknesses and number of plies in discrete form on optimum solution is investigated considering Uniform Thickness Approach (UTA) and Variable Thickness Approach (VTA) for various load cases.
The Internal Rating Based (IRB) approach requires that financialinstitutions estimate the Loss Given Default (LGD) parameter not only based onclosed defaults but also considering partial recoveries from incomplete workouts.This is one of the key issues in preparing bias-free samples, as there is aneed to estimate the remaining part of the recovery for incomplete defaultsbefore including them in the modeling process. In this paper, a new approachis proposed, where parametric and non-parametric methods are presented toestimate the remaining part of the recovery for incomplete defaults, in pre-defined intervals concerning sample selection bias. Additionally it is shown thatrecoveries are driven by different set of characteristics when default is aging.As an example, a study of major Polish bank is presented, where regressiontree outperforms other methods in the secured products segment, and fractionalregression provides the best results for non-secured ones.
The main aim of this paper is to analyse the effect of Common Agricultural Policy (CAP) subsidies on technical efficiency of Polish dairy farms. We have distinguished several types of subsidies and provided an analysis to find out which types are most likely to engender systematic differences in technical efficiency. A balanced panel of microeconomic data on Polish dairy farms over an eight-year period (between 2004 and 2011), taken from the Farm Accountancy Data Network (FADN), is used. The translog production function is estimated by employing the Bayesian approach. The empirical results show that the elasticity of production with respect to livestock is the highest, whereas with respect to feed is the lowest. The mean technical efficiency in the covered period is 83%. The research reveals the negative effect of subsidies on technical efficiency.
The primary evaluation of the economic losses caused by water pollution in Shanghai in the year 2009 is made by classification approach in order to provide basis for decision of the relative water management policy. The result shows that the portion of water pollution losses in GDP of Shanghai was 2.7%, which was still lower than the average level of whole China despite of the local high population density and the scale of industry, suggesting to some extent the continuous attention in water protection paid by Shanghai government.
Theory and practice of environmental protection in the case of foundries in Europe and Asia
• Experience resulting from the cooperation with the foundries in a few European countries, China and India
• Phenomena and factors affecting the pollution of the natural environment and the implementation of measures aiming at the
environmental protection
Every specialist dealing with foundry processes and their impact on environmental pollution must have encountered in their professional
careers numerous situations in which the theory of environmental protection confronts the stark reality. The discrepancy between theory
and practice can particularly be noticed in foundry engineering in developing countries where the contrasts between different countries and
casting plants are extremely striking. The comparison of working conditions in European and Asian foundries provides a vast scope for
further observations and analyses. Environmental protection seems not only a concern of manufacturers of castings, but also of their
customers whose opinion exerts a significant influence on both the acceptability of working conditions and on the approach to
environmental pollution adopted in metal casting industry.
The article presents a number of examples of various outlooks on environmental issues in foundries manufacturing a wide range of cast
steel and cast iron castings, where different technologies and production processes are applied.
The transition effect between different track-foundation systems is examined from the point of view of energy that is produced during the passage of load. Analytical solution is given. A model of beam on elastic foundation with damping is used as the base model. It is developed into a model composed of two parts that represent the track-subgrade system with an abrupt change in mechanical parameters: bending stiffness, foundation stiffness, damping, and mass. Several calculations are carried out including examples of comparative calculations with the Finite Difference Model and the Finite Element Model. Transient rail deflections and energy are determined, which may serve to estimate the rate of track-subgrade deterioration.
The machinability and the process parameter optimization of turning operation for 15-5 Precipitation Hardening (PH) stainless steel have been investigated based on the Taguchi based grey approach and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). An L27 orthogonal array was selected for planning the experiment. Cutting speed, depth of cut and feed rate were considered as input process parameters. Cutting force (Fz) and surface roughness (Ra) were considered as the performance measures. These performance measures were optimized for the improvement of machinability quality of product. A comparison is made between the multi-criteria decision making tools. Grey Relational Analysis (GRA) and TOPSIS are used to confirm and prove the similarity. To determine the influence of process parameters, Analysis of Variance (ANOVA) is employed. The end results of experimental investigation proved that the machining performance can be enhanced effectively with the assistance of the proposed approaches.
Marine governance is an essential way of achieving the objectives of sustainable development. It ought to be understood as the process of planning, as well as decision-making and management at the national and regional levels taking into account the global ocean as an ecological unity. The process of decision-making is closely interrelated with the regional and transnational cross-border cooperation. The adoption of the EU Directive establishing a framework for maritime spatial planning (hereinafter: MSP Directive) plays an important role in developing of marine spatial planning in Europe by promoting MSP instruments. MSP Directive requires all coastal EU Member States to prepare cross-sectoral maritime spatial plans by 2021. The development of spatial plans for Polish marine areas was started in 2013. The MSP legal bases are included in the Marine Areas of the Republic of Poland and Maritime Administration Act of 1991 amended in 2015 and its implementing regulations.
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