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Number of results: 573
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Abstract

This paper presents a complex study of anhydrite interbeds influence on the cavern stability in the Mechelinki salt deposit. The impact of interbeds on the cavern shape and the stress concentrations were also considered. The stability analysis was based on the 3D numerical modelling. Numerical simulations were performed with use of the Finite Difference Method (FDM) and the FLAC3D v. 6.00 software. The numerical model in a cuboidal shape and the following dimensions: length 1400, width 1400, height 1400 m, comprised the part of the Mechelinki salt deposit. Three (K-6, K-8, K-9) caverns were projected inside this model. The mesh of the numerical model contained about 15 million tetrahedral elements. The occurrence of anhydrite interbeds within the rock salt beds had contributed to the reduction in a diameter and irregular shape of the analysed caverns. The results of the 3D numerical modelling had indicated that the contact area between the rock salt beds and the anhydrite interbeds is likely to the occurrence of displacements. Irregularities in a shape of the analysed caverns are prone to the stress concentration. However, the stability of the analysed caverns are not expected to be affected in the assumed operation conditions and time period (9.5 years).
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Abstract

The national power industry is based primarily on its own energy mineral resources such as hard and brown coal. Approximately 80% of electrical energy production from these minerals gives us complete energy independence and the cost of its production from coal is the lowest in comparison to other sources. Poland has, for many decades had vast resources of these minerals, the experience of their extraction and processing, the scientific-design facilities and technical factories manufacturing machines and equipment for own needs, as well as for export. Nowadays coal is and should be an important source of electrical energy and heat for the next 25–50 years, because it is one of the most reliable and price acceptable energy sources. This policy may be disturbed over the coming decades due to the depletion of active resources of hard and brown coal. The conditions for new mines development as well as for all coal mining sector development in Poland are very complicated in terms of legislation, environment, economy and image. The authors propose a set of strategic changes in the formal conditions for acquiring mining licenses. The article gives a signal to institutions responsible for national security that without proposed changes implementation in the legal and formal process it, will probably not be possible to build next brown coal, hard coal, zinc and lead ore or other minerals new mines.
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Abstract

Miarą sukcesu rozwojowego współczesnych regionów i zarazem czynnikiem podtrzymującym trwałość tego sukcesu jest przede wszystkim jakość życia mieszkańców. Według definicji Rady Europy (A new strategy for Social Cohesion, 2004, s. 3) spójność społeczna to zdolność terytorialnych społeczności do zapewnienia dobrobytu wszystkim swoim członkom, zmniejszania rozwarstwień społecznych i unikania polaryzacji. W ocenie spójności społecznej regionu dolnośląskiego w przekroju powiatów w latach 2005–2015 uwzględniono zmienne z następujących dziedzin: dochody i aktywność ekonomiczna ludności, warunki mieszkaniowe ludności, dostępność usług i przestrzeni publicznej. Do pomiaru i oceny zmian poziomu spójności społecznej województwa dolnośląskiego w przekroju powiatów w latach 2005–2015 zastosowano odległość GDM1 oraz miernik Theila.
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Abstract

One of the characteristic features of the architectural landscape of the Stalinist era in Poland (post 1949) was the widespread use of standard designs. Initially these were not part of the propaganda of socialist realist architecture. The ideological justification of the use of standard designs as a “reflection of the era in which they arise” only began in 1953. During the following three years, a period in which the slow process of undermining Stalinist dogmas in architecture took place, supplanted by an openly technocratic vision of an industrialized architecture, the problem of standard designs regularly arose in contemporary discourse. One aspect was the growing criticism of the monotony of housing estates erected throughout the country by the state Workers Housing Department. The issue of these typical projects also came up at the National Conference of Architects in March 1956, where severe criticisms of socialist realism were voiced. The criticism arising from the architects’ milieu was heard alongside positive assessments from those close to the construction industry, who saw standard projects as instruments for producing an “architectural background worthy of a socialist society” in the Polish landscape. The adoption of “theses on typification” in 1959 (probably unwittingly repeating the words used by Hermann Muthesius in 1914) by the team of Władysław Gomułka finally terminated this period of intellectual fermentation, administratively imposing the use of standard projects and industrialised building technologies.One of the characteristic features of the architectural landscape of the Stalinist era in Poland (post 1949) was the widespread use of standard designs. Initially these were not part of the propaganda of socialist realist architecture. The ideological justification of the use of standard designs as a “reflection of the era in which they arise” only began in 1953. During the following three years, a period in which the slow process of undermining Stalinist dogmas in architecture took place, supplanted by an openly technocratic vision of an industrialized architecture, the problem of standard designs regularly arose in contemporary discourse. One aspect was the growing criticism of the monotony of housing estates erected throughout the country by the state Workers Housing Department. The issue of these typical projects also came up at the National Conference of Architects in March 1956, where severe criticisms of socialist realism were voiced. The criticism arising from the architects’ milieu was heard alongside positive assessments from those close to the construction industry, who saw standard projects as instruments for producing an “architectural background worthy of a socialist society” in the Polish landscape. The adoption of “theses on typification” in 1959 (probably unwittingly repeating the words used by Hermann Muthesius in 1914) by the team of Władysław Gomułka finally terminated this period of intellectual fermentation, administratively imposing the use of standard projects and industrialised building technologies.
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Abstract

This is attempt at drawing an audial map of Władysław Reymont’s The Vampire, taking into account all kinds of sound effects that create the atmosphere of horror, complicate the relations between characters and provoke a sense of the uncanny in the reader. One of those devices, whose importance is hard to overestimate, is silence (speechlessness). The article analyzes in detail its use in the novel, which is in many ways indebted to the modernist, neo-romantic poetics of Young Poland.
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Abstract

Michal Walicki (1904–1966) studied Art History at the University of Warsaw (1924–1929), where he received his doctorate for his dissertation on the murals in the Chapel of the Holy Trinity in the Castle of Lublin (1418), under the guidance of Prof. Zygmunt Batowski. He worked in the Department of Polish Architecture at the Warsaw Technical University, at the Warsaw School of Fine Arts (later the Academy of Fine Arts), at the National Museum, and the Art History Institute of the Warsaw University. In 1933, his earned his habilitation for his thesis on the stylistic development of panel painting in fifteenth–century Poland. During World War II, he participated in the resistance movement; he was arrested (in 1949) and put in prison. After his release (in 1953), he combined work at the Institute of History of Art at the Warsaw University and the State Institute of Art (later the Institute of Art of the Polish Academy of Sciences). Michał Walicki’s academic activities encompassed a surprisingly wide spectrum of subjects, though his particular field of interest was painting. He had a ‘positivist’ temperament, concerned with a painstaking search for new works of art and the collecting of material, and above all with cataloguing and sharing the collections. In texts written before the war he built a firm foundation for the study of panel painting in fifteenth–century Poland, although his narrow national perspective is now certainly difficult to accept. After his employment at the National Museum in Warsaw, he changed his profile of research, focusing on modern painting (particularly Dutch), but also on the best understood popularization and education through art. After the war, he initiated and coordinated the work on a series of syntheses, setting new standards of quality in Polish academic studies. He belonged to the narrow circle of great humanists who could write about art with passion, in a manner accessible and understandable to all. He developed his own, easily recognizable style, impressionistic in character, well–suited to aesthetic experiences. As an outstanding university lecturer and museum official, he became one of the founders and most important authorities of the Warsaw school of art history, and as a personality had a profound impact on students and friends led by Jan Białostocki. Above all, he instilled in them a broad outlook on matters of art and the importance of publishing in foreign languages.
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Abstract

Efektywność posłużenia się analogią w nauce zależy od stopnia adekwatności danej analogii. Teza ta jest poddana sprawdzeniu w kontekście analogii, zarówno biologicznych, jak i informatycznych użytych w teorii memów kulturowych, jako podstawy ewolucyjnego rozwoju nauki, czy szerzej kultury. Uwidoczniony w pracy problem z wyróżnieniem kulturowego odpowiednika biologicznego osobnika ma wpływ na rodzaj ewolucji – darwinowski czy lamarckowski.
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Abstract

The article discusses Nicholas Rescher’s metaphilosophical view of orientational pluralism. In his essay Philosophical Disagreement: An Essay towards Orientational Pluralism in Metaphilosophy Rescher explains a substantial difference between philosophy and science—namely, that philosophers—differently than scientists— continuously propose and undermine various solutions to the same old problems. In philosophy it is difficult to find any consensus or convergence of theories. According to Rescher, this pluralism of theoretical positions is caused by holding by philosophers different sets and hierarchies of cognitive values, i.e. methodological orientations. These orientations are chosen in virtue of some practical postulates, they are of axiological, normative, but not strictly theoretical character. Different methodological orientations yield different evaluations of philosophical theses and arguments. This article shows that Rescher’s account does not determine clearly acceptable cognitive values. If there are no clear criteria of evaluation of methodological orientations, then the described view seems to be identical to relativism adopting the everything goes rule. In addition, accepting orientational pluralism it is hard to avoid the conclusion that discussions between various philosophical schools are futile or can be reduced to non-rational persuasion.
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Abstract

The paper refers to planning deliveries of food products (especially those available in certain seasons) to the recipients: supermarket networks. The paper presents two approaches to solving problems of simultaneous selection of suppliers and transportation modes and construction of product flow schedules with these transportation modes. Linear mathematical models have been built for the presented solution approaches. The cost criterion has been taken into consideration in them. The following costs have been taken into account: purchase of products by individual recipients, transport services, storing of products supplied before the planned deadlines and penalties for delays in supply of products. Two solution approaches (used for transportation planning and selection of suppliers and selection of transportation modes) have been compared. The monolithic approach calls for simultaneous solutions for the problems of supplier selection and selection of transportation modes. In the alternative (hierarchical) solution approach, suppliers are selected first, and then transportation companies and their relevant transportation modes are selected. The results of computational experiments are used for comparison of the hierarchical and monolithic solution approaches.
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Abstract

Problems associated with designing silencers are presented. Results of direct tests of silencers for cooperation with systems of axial fans, as well as results of numerical tests of a two stage acoustic silencer, are given. The numerical tests enabled determining the distribution of acoustic field inside the silencer and in the surrounding area. In those tests A sound insertion losses for different variants of installation inside the silencer, as well as for two different types of absorbing material used to fill the silencer walls, were determined. Impact of design features of silencers on effectiveness of noise reduction is described. Also, a technical sketch of a universal silencer with significant noise reduction (DipS = 39:1 dB) which can be successfully used in many ventilation systems is presented
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Abstract

The article presents probable consequences for the protection of deposits and other mining needs, related to the entry into force of the Act of July 5, 2018 on the Facilitation of the Preparation and Implementation of Housing Investments and Accompanying Investments. This act introduces facilities for the preparation and implementation of housing as well as related projects, including the possibility of introducing investments incompatible with the existing local plans. In addition, it does so in a situation where land reserves for housing development, both in local plans and in studies of conditions and directions of spatial development, many times exceed the future needs of our country. The article presents the fundamental changes introduced by the Act to the existing planning and spatial planning system, as well as the risks associated with the mining industry. Among the latter, the following can be mentioned: lower stability of local law regulations, the possibility of resolving changes in spatial development at a very fast pace, without providing an effective way to inform subjects that may be threatened by these changes and increase the probability of the appearance of investments in the area of mining, the neighborhood of which may lead to limit or even liquidate these installations, due to even their disadvantages to housing. Some remedies have been proposed to mitigate some of the threats in the article. The Act in question was prepared and passed at an express pace, with a large opposition from many environments. At the same time, a number of legal solutions were applied in it, which were not applied in the Polish law. As a result, there are many doubts about the effects of its introduction.
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