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Studia Humanistyczne AGH
No full textThe aim of this article is to analyze and interpret Cieszymir and Księgi Rodu Słowiańskiego, texts by Paweł Stalmach (1824–1891), a Polish national activist in Cieszyn Silesia. Using gathered data, traditions, and legends, Stalmach presents a mythologized culture and religion of the Slavs, as well as the history of Cieszyn and Cieszyn Silesia. The reflection also concerns the role that Cieszymir and Księgi Rodu Słowiańskiego in the author’s socio-political activities. The analysis was conducted based on the narrative concepts of Hayden White and Frank Ankersmit, as well as the mechanisms of mythologization defined by Jerzy Topolski (universalization, mystification, deification or glorification, stereotyping, and prophesying). The picture of the past presented by Stalmach contains almost all mechanisms of mythologization. Cieszymir and Księgi Rodu Słowiańskiego present an extremely positive image of the Slavs. The texts were part of Stalmach’s socio-political activities aimed at creating a local Polish community in Cieszyn Silesia.Głównym celem artykułu jest analiza i interpretacja Cieszymira i Ksiąg Rodu Słowiańskiego, dwóch tekstów autorstwa Pawła Stalmacha (1824–1891), polskiego działacza narodowego na Śląsku Cieszyńskim. Stalmach, korzystając z zebranych danych, przekazów i legend, przedstawia zmitologizowaną kulturę i religię Słowian, a także historię Cieszyna i Śląska Cieszyńskiego. Refleksja zawarta w artykule dotyczy również roli, jaką Cieszymir i Księgi Rodu Słowiańskiego odegrały w społeczno-politycznej działalności autora. Analiza została przeprowadzona na podstawie narratywistycznych koncepcji Haydena White’a i Franka Ankersmita oraz zdefiniowanych przez Jerzego Topolskiego mechanizmów mitologizacji (uniwersalizację, mistyfikację, deifikację czy gloryfikację, stereotypizację i profetyzację). Przedstawiony przez Stalmacha obraz przeszłości zawiera niemal wszystkie wyróżnione mechanizmy mitologizacji. Zarówno z Cieszymira, jak i z Ksiąg Rodu Słowiańskiego wyłania się niezwykle pozytywny obraz Słowian. Teksty stanowiły element działalności społeczno-politycznej Stalmacha, zmierzającej ku tworzeniu lokalnej polskiej wspólnoty na Śląsku Cieszyńskim.Krakówwersja wydawnicz
Studia Humanistyczne AGH
No full textrelationships in postmodernity. While psychology and sociology currently dominate this topic, an anthropological approach based on ethnographic research can provide a deeper understanding of this phenomenon. Ethnography allows for the examination of diverse strategies and practices adopted by people living in a nonmonogamous manner. The anthropological approach, which places individual human experience at the center of cultural context, has the potential to broaden an understanding of concepts such as jealousy, relationship/ frienship, and family. The author examines the development of concepts of non-monogamy, polygamy, and monogamous family by looking at the beginnings of anthropology and then critically reading them in relation to the contemporary social world and her own fieldwork conducted among women living in consensually nonmonogamous relationships in Poland.Artykuł podejmuje temat konsensualnej niemonogamii jako nowego dla antropologii obszaru badań nad intymnymi związkami w czasach ponowoczesności. Tematyka ta jest obecnie zdominowana przede wszystkim przez psychologię i socjologię. Podejście antropologiczne oparte na badaniach etnograficznych może pozwolić na lepsze zrozumienie tego zjawiska. Etnografia umożliwia ujęcie zróżnicowanych strategii i praktyk podejmowanych przez ludzi żyjących w sposób niemonogamiczny. Podejście antropologiczne, które z założenia stawia w centrum indywidualne doświadczenie ludzkie osadzone w kontekście kulturowym, ma szansę poszerzyć rozumienie pojęć takich jak zazdrość, związek/przyjaźń czy rodzina. Autorka, analizując rozwój między innymi określeń: niemonogamia, poligamia czy rodzina monogamiczna, przygląda się nurtom początków antropologii, a następnie krytycznie czyta je w odniesieniu do dzisiejszego świata społecznego oraz własnych badań terenowych prowadzonych w Polsce wśród kobiet żyjących we współczesnych związkach konsensualnie niemonogamicznych.Krakówwersja wydawnicz
Opuscula Mathematica
No full textWe deduce isoperimetric estimates for solutions of linear stationary and evolution problems. Our main result establishes the comparison in norm between the solution of a problem and its symmetric version when nonlocal diffusion defined through integrable kernels is replacing the usual local diffusion defined by a second order differential operator. Since an appropriate kernel rescaling allows to define a sequence of solutions of the nonlocal diffusion problems converging to their local diffusion counterparts, we also find the corresponding isoperimetric inequalities for the latter, i.e. we prove the classical Talenti's theorem. The novelty of our approach is that we replace the measure geometric tools employed in Talenti's proof, such as the geometric isoperimetric inequality or the coarea formula, by the Riesz's rearrangement inequality. Thus, in addition to providing a proof for the nonlocal diffusion case, our technique also introduces an alternative proof to Talenti's theoremKrakówwersja wydawnicz
Geomatics and Environmental Engineering
No full textThe Segawe municipal solid waste (SW) landfill in Tulungagung Regency, Indonesia, has currently exceeded its capacity. This study aimed to determine the potential use of dumped SW at the landfill as raw material for the production of refuse derived fuel (RDF). Buried SW samples were collected at a passive zone of the landfill in six locations. The samples were sieved using 10 and 30 mm mesh sieves. A composition analysis was conducted following the ASTM D5231-92 method to sample fractions of greater than 30 mm size. The density was measured according to the weight and volume. The moisture and volatile matter contents were analyzed using the ASTM D2216-10 and D3175-07 methods, respectively. The calorific value was measured using a Parr C3000 bomb calorimeter following the ASTM D5865 method. The buried SW composition was dominated by a fraction size that was greater than 30 mm (79.4%). This fraction was dominantly composed of plastics (71.2%) and had average volatile matter and calorific values which met RDF criteria as a fuel. However, the ash and moisture contents exceeded the standards and, therefore, required appropriate treatments before their applications.Krakówwersja wydawnicz
Geology, Geophysics & Environment
No full textThe study analyzes changes in the physico-chemical parameters in a 400 cm2 artificial water reservoir with distilled water, exposed to a 2-week (±2 days) period of atmospheric conditions in Krakow. After nearly 500 days, dry and wet deposition caused a shift from neutral to acidic pH levels (7.30–5.12, averaging 6.22 pH) and an average electric conductivity of 19.5 µS/cm (1.6–143.0 µS/cm). The study investigated chemical and biological pollutants, including pollen and fungal spores. Three distinct air quality periods were identified: (1) characterized by vehicle and combustion-related pollutants (Oct-Jan), (2) a transitional phase with increased biological particles (Feb-May), and (3) dominated by pollen and fungal spores (Jun-Sep). Despite peak air pollution in the warmest months, air temperature showed an inverse relationship with pollutant concentration, possibly due to decreased air humidity. Precipitation positively impacted air quality. The artificial reservoir received a total of 0.7 kg of air pollutants ( of surface water table). This corresponds to an annual load of 0.5 kg (551.4 mg) and a daily load of 1.51 mg. The reservoir’s pollutant capture capacity was estimated at 28% ±21% (mean±SD), with a critical value of 12%. The study evaluated Krakow’s surface water reservoirs’ capacity to mitigate air pollution, indicating potential benefits for urban air quality.Krakówwersja wydawnicz
Geology, Geophysics & Environment
No full textMicroseismic monitoring is an important technique that can be used to identify fractures in rock mass. The aim of this article is to identify, on the basis of the location of microseismic events, structures formed by hydraulic fracturing in the Wysin-2H/2Hbis horizontal well from the Baltic Basin in northern Poland, and to compare the patterns of these structures with the direction of regional stresses. The authors proposed a novel multi-step workflow for finding these structures. To be able to delineate the structures from microseismic events with greater accuracy, a collapsing algorithm was used. Then, based on the Hierarchical Density-Based Spatial Clustering of Applications with Noise (HDBSCAN) clustering algorithm and the elongation coefficient of each cluster, probable fissures were identified and compared against the maximum horizontal stress direction. In addition, based on the 3D seismic data from the Wysin and the calculated geomechanical parameters in the monitoring well, the probability classes of brittleness indices in the LMR (??-??) parameter domain were determined. A comparative analysis was performed between the two variants of microseismic event location (before and after the collapsing procedure) and the estimated probability of a given class of brittleness index. The comparison of the event location with the 3D seismic data was used to validate the results before and after collapsing due to the high resolution of the seismic method. It is shown that the collapsed events appeared in more rigid regions, where more energy release is expected.Krakówwersja wydawnicz
Composites Theory and Practice
No full textThe paper presents the experimental results on the fabrication of lightweight aluminum alloy AA2024 matrix composites reinforced with fly ash microspheres using powder metallurgy (PM) via hot pressing. The primary aim was to achieve a composite with the highest possible matrix density while preserving undamaged microspheres. A mixture of powders consisting of AA2024 alloy powder and 10 wt% fly ash was pressed at 550°C and pressures of 5, 10, 20, and 30 MPa for two minutes. The obtained composites had densities in the range of 1.93 - 2.31 g/cm3. Microstructural analysis revealed uniform distribution of the fly ash microspheres in the aluminum alloy matrix. The hardness of the composites was comparable only between the samples pressed at 10, 20, and 30 MPa, falling within the range of 118 to 122 HV0.1. The sample pressed at 5 MPa exhibited significantly lower hardness of 98.8 HV0.1. The composites produced by pressing at 20 and 30 MPa were characterized by high yield strength and compression strength, ranging from 211 to 216 MPa and 300 to 354 MPa, respectively. The composites pressed applying lower pressures, especially those at 5 MPa, exhibited significantly lower values of plastic yield strength and compression strength, with values of 109 MPa and 115 MPa, respectively. Taking into account the density, the number of damaged microspheres, and the microstructure of the AA2024/fly ash composite, the optimal pressing range is between 10 - 20 MPa, but superior mechanical properties were achieved after pressing at 20 and 30 MPa.wersja wydawnicz
CAD in machinery design : implementation and educational issues : XXIX International Polish-Ukrainian Conference
No full textThe dynamics of oscillations of cantilever-type oscillators have been studied in this work. The probabilistic model of a cantilever is explained. Dependencies for the probability density, mean mathematical expectation, and standard deviation were developed. A fluctuation model of a cantilever was constructed, and the dependencies for the probability density for a direct problem were developed. The modeling of the mathematical expectation and phase variance for the inverse problem was performed.Krakówrozdziałpublikacja pokonferencyjnawersja wydawnicz
Nauka – Technika – Technologia : seria wydawnicza AGH. Tom 7
No full textArtykuł przedstawia wyniki badań popiołu lotnego wapiennego pozyskanego z Elektrowni Bełchatów w stanie naturalnym oraz po jego mechanicznym uzdatnieniu w wyniku przemiału. Oznaczono skład chemiczny popiołu, gęstość oraz stopień zmielenia – definiowany powierzchnią właściwą wg Blaine’a, określono rozkład granulometryczny i wielkości charakterystyczne, takie jak pozostałość na sicie 0,090 mm oraz miałkość. Do określenia wpływu przemiału popiołu na jego właściwości fizyczne użyto mieszanin popiołowo-cementowych w proporcjach 30/70 i 70/30, a wyznacznikami były wyniki badań wodożądności oraz wskaźnika aktywności. Uzyskane wyniki potwierdzają wysoką wartość surowcową popiołów lotnych wapiennych jako materiału do produkcji spoiw, ale niezbędne jest ich uzdatnienie, na przykład przez przemiał.The article presents the results of tests on calcareous fly ash obtained from the Bełchatów Power Plant in its natural state and after its mechanical treatment by grinding. The scope of the research included the chemical composition of the ash, density and the degree of grinding – defined by the specific surface according to Blaine. The granulometric distribution and characteristic sizes such as the residue on the 0.090 mm sieve and fineness were also of the study. To determine the impact of ash milling on its physical properties, the ash-cement mixtures in the proportions of 30/70 and 70/30 were used, and the determinants were the results of water demand tests and the activity index. The results prove the high raw material value of calcareous fly ashes for the production of binders, but its treatment is necessary, for example by grinding.Krakówrozdziałwersja wydawnicz
Computer Methods in Materials Science
No full textNumerical modelling of laser welding requires that numerous strongly coupled physical phenomena be taken into account. A laser is a source of welding heat characterized by the small size of the heating volume and the shape of the fusion zone has a marked impact on the quality of the weld. In this work, a conical heat source was used with geometrical parameters to give the appropriate profile of the fusion line. The use of the weld shape factor and the dependence of the power density on the linear welding energy increases the accuracy of matching the calculated shape of the fusion line. The heat source was tested for the continuous welding case of a sheet made of steel type S355J2. The CFD software ANSYS Fluent was used to calculate the welding model. The temperature field, calculated using the finite volume method, was used to calculate the phase composition and fusion zone profile tracking. The nodes of the model reaching the maximum solidus temperature of S355J2 steel, form the profile of the fusion zone. The laser welding model allows for tracking of the kinetics of phase transformations in the cooling stage. Continuous cooling transformation phase diagram data is loaded for the welded steel grade. The calculation results of the welding model were compared with the weld micrographs.Krakówwersja wydawnicz