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Abstract

The domestic (Polish) lignite deposits, including the Bełchatów deposit, are classified as multi- mineral and multi-raw materials. Ensuring the possibility of using a significant part of all minerals present in this type of deposits should be a matter of priority for mines. Over several dozen years of operation, the Bełchatów Lignite Mine, based on its own experience in documenting and exploiting both the main mineral and accompanying minerals, as well as rock mass components that are not solid minerals, this mine has developed a new approach to the problem of the comprehensive use of deposit resources. The content of the article is an attempt to answer the question: do the applicable laws guarantee a comprehensive and rational use of mineral deposits whose resources are non-renewable? On the example of the area of the Bełchatów lignite deposit, the comprehensive and rational use of mineral resources was analysed. It was indicated that the reasons for their use result from the lack of appropriate organizational, economic and financial solutions. Particular attention was paid to the need to modify the licensing procedures for prospecting, documenting and extracting minerals. It seems reasonable to introduce multi-resource concessions, which are an important element of the circular economy. Therefore, proposals were formulated regarding the introduction of additional legal regulations and instruments of an economic and financial nature. These would be able to guarantee the comprehensive and rational use of most mineral resources.
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Authors and Affiliations

Elżbieta Hycnar
1
ORCID: ORCID
Tadeusz Ratajczak
2
ORCID: ORCID
Ryszard Uberman
2
ORCID: ORCID

  1. AGH University of Kraków, Poland
  2. Mineral and Energy Economy Research Institute PAS, Kraków, Poland
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Abstract

The engine simulations have become an integral part of engine design and development. They are based on approximations and assumptions. The precision of the results depends on the accuracy of these hypotheses. The simplified models of frozen composition, chemical equilibrium and chemical kinetics provide the compositions of combustion products for engine cycle simulations. This paper evaluates the effects of different operating conditions and hypotheses on the exergetic analysis of a spark-ignition engine. The Brazilian automotive market has the highest number of flex-fuel vehicles. Therefore, a flex-fuel engine is considered for simulations in order to demonstrate the effects of these different hypotheses. The stroke length and bore diameter have the same value of 80 mm. The in-cylinder irreversibility is calculated for each case at the closed part of the engine cycle. A comparative analysis of these hypotheses provides a comprehensive evaluation of their effects on exergetic analysis. Higher values of accumulated irreversibility are observed for the oversimplified hypothesis.

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Authors and Affiliations

Caio H. Rufino
Alessandro J.T.B. de Lima
Ana P. Mattos
Fazal U.M. Allah
Janito V. Ferreira
Waldyr L.R. Gallo
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Abstract

The Author defines the strategy of cultural identity of young Canadians of Polish origin. His work is based on questionnaires carried out within the group.

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Authors and Affiliations

Roch Little
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Abstract

The problem of optimal design of symmetrical double-lap adhesive joint is considered. It is assumed that the main plate has constant thickness, while the thickness of the doublers can vary along the joint length. The optimization problem consists in finding optimal length of the joint and an optimal cross-section of the doublers, which provide minimum structural mass at given strength constraints. The classical Goland-Reissner model was used to describe the joint stress state. A corresponding system of differential equations with variable coefficients was solved using the finite difference method. Genetic optimization algorithm was used for numerical solution of the optimization problem. In this case, Fourier series were used to describe doubler thickness variation along the joint length. This solution ensures smoothness of the desired function. Two model problems were solved. It is shown that the length and optimal shape of the doubler depend on the design load.
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Bibliography

[1] L.F.M. da Silva, P.J.C. das Neves, R.D. Adams, and J.K. Spelt. Analytical models of adhesively bonded joints. Part I: Literature survey. International Journal of Adhesion and Adhesives, 29(3):319–330, 2009. doi: 10.1016/j.ijadhadh.2008.06.005.
[2] E.H. Wong and J. Liu. Interface and interconnection stresses in electronic assemblies – A critical review of analytical solutions. Microelectronics Reliability, 79:206–220, 2017. doi: 10.1016/j.microrel.2017.03.010.
[3] S. Budhe, M.D. Banea, S. de Barros, and L.F.M. da Silva. An updated review of adhesively bonded joints in composite materials. International Journal of Adhesion and Adhesives, 72:30–42, 2017. doi: 10.1016/j.ijadhadh.2016.10.010.
[4] K.P. Barakhov and I.M. Taranenko. Influence of joint edge shape on stress distribution in adhesive film. In: M. Nechyporuk, V. Pavlikov, D. Kritskiy (eds) Integrated Computer Technologies in Mechanical Engineering – 2021. ICTM 2021. Lecture Notes in Networks and Systems, 367:123–132, Springer, Cham, 2022. doi: 10.1007/978-3-030-94259-5_12.
[5] H. Lee, S. Seon, S. Park, R. Walallawita, and K. Lee. Effect of the geometric shapes of repair patches on bonding strength. The Journal of Adhesion, 97(3):1–18, 2019. doi: 10.1080/00218464.2019.1649660.
[6] F. Ramezani, M.R. Ayatollahi, A. Akhavan-Safar, and L.F.M. da Silva. A comprehensive experimental study on bi-adhesive single lap joints using DIC technique. International Journal of Adhesion and Adhesives, 102:102674, 2020. doi: 10.1016/j.ijadhadh.2020.102674.
[7] Ya.S. Karpov. Jointing of high-loaded composite structural components. Part 2. Modeling of stress-strain state. Strength of Materials, 38(5):481–491, 2006. doi: 10.1007/s11223-006-0067-9.
[8] J. Kupski and S. Teixeira de Freitas. Design of adhesively bonded lap joints with laminated CFRP adherends: Review, challenges and new opportunities for aerospace structures. Composite Structures, 268:113923, 2021. doi: 10.1016/j.compstruct.2021.113923.
[9] S. Amidi and J. Wang. An analytical model for interfacial stresses in double-lap bonded joints. The Journal of Adhesion, 95(11):1031–1055, 2018. doi: 10.1080/00218464.2018.1464917.
[10] H. Kumazawa and T. Kasahara. Analytical investigation of thermal and mechanical load effects on stress distribution in adhesive layer of double-lap metal-composite bonded joints. Advanced Composite Materials, 28(4):425–444, 2019. doi: 10.1080/09243046.2019.1575028.
[11] S. Kurennov and N. Smetankina. Stress-strain state of a double lap joint of circular form. Axisymmetric model. In: M. Nechyporuk, V. Pavlikov D. Kritskiy (eds) Integrated Computer Technologies in Mechanical Engineering – 2021. ICTM 2021. Lecture Notes in Networks and Systems, 367:36–46, Springer, Cham, 2022. doi: 10.1007/978-3-030-94259-5_4.
[12] S. E. Stapleton, B. Stier, S. Jones, A. Bergan, I. Kaleel, M. Petrolo, E. Carrera, and B.A. Bednarcyk. A critical assessment of design tools for stress analysis of adhesively bonded double lap joints. Mechanics of Advanced Materials and Structures, 28(8):791–811, 2019. doi: 10.1080/15376494.2019.1600768.
[13] R.H. Kaye and M. Heller. Through-thickness shape optimisation of bonded repairs and lap-joints. I nternational Journal of Adhesion and Adhesives, 22(1):7–21, 2002. doi: 10.1016/s0143-7496(01)00029-x.
[14] S. Kurennov, K. Barakhov, I. Taranenko, and V. Stepanenko. A genetic algorithm of optimal design of beam at restricted sagging. Radioelectronic and Computer Systems, 1:83–91, 2022. doi: 10.32620/reks.2022.1.06.
[15] V.S. Symonov, I.S. Karpov, and J. Juračka. Optimization of a panelled smooth composite shell with a closed cross-sectional contour by using a genetic algorithm. Mechanics of Composite Materials, 49(5):563–570, 2013. doi: 10.1007/s11029-013-9372-0.
[16] N.S. Kulkarni, V.K. Tripathi. Variable thickness approach for finding minimum laminate thickness and investigating effect of different design variables on its performance. Archive of Mechanical Engineering, 65(4):527–551, 2018. doi: 10.24425/ame.2018.125441.
[17] H. Ejaz, A. Mubashar, I.A. Ashcroft, E. Uddin, and M. Khan. Topology optimisation of adhesive joints using non-parametric methods. International Journal of Adhesion and Adhesives, 81:1–10, 2018. doi: 10.1016/j.ijadhadh.2017.11.003.
[18] H.L. Groth and P. Nordlund. Shape optimization of bonded joints. International Journal of Adhesion and Adhesives, 11(4):204–212, 1991. doi: 10.1016/0143-7496(91)90002-y.
[19] R.Q. Rodríguez, R. Picelli, P. Sollero, and R. Pavanello. Structural shape optimization of bonded joints using the ESO method and a honeycomb-like mesh. J ournal of Adhesion Science and Technology, 28(14-15):1451–1466, 2014. doi: 10.1080/01694243.2012.698112.
[20] E.G. Arhore, M. Yasaee, and I. Dayyani. Comparison of GA and topology optimization of adherend for adhesively bonded metal composite joints. International Journal of Solids and Structures, 226-227:111078, 2021. doi: 10.1016/j.ijsolstr.2021.111078.
[21] S. Kumar, and de A. de Tejada Alvarez. Modeling of geometrically graded multi-material single-lap joints. 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. doi: 10.2514/6.2015-1885.
[22] S.S. Kurennov: Refined mathematical model of the stress state of adhesive lap joint: experimental determination of the adhesive layer strength criterion. Strength of Materials, 52:779–789, 2020. doi: 10.1007/s11223-020-00231-5.
[23] P. Zou, J. Bricker, and W. Uijttewaal. Optimization of submerged floating tunnel cross section based on parametric Bézier curves and hybrid backpropagation – genetic algorithm. Marine Structures, 74:102807, 2020. doi: 10.1016/j.marstruc.2020.102807.
[24] O. Coskun and H.S.Turkmen. Multi-objective optimization of variable stiffness laminated plates modeled using Bézier curves. Composite Structures, 279:114814, 2022. doi: 10.1016/j.compstruct.2021.114814.
[25] S. Kumar and P.C. Pandey. Behaviour of bi-adhesive joints. Journal of Adhesion Science and Technology, 24(7):1251–1281, 2010. doi: 10.1163/016942409x12561252291982.
[26] Ö. Öz and H. Özer. On the von Mises elastic stress evaluations in the bi-adhesive single-lap joint: a numerical and analytical study. Journal of Adhesion Science and Technology, 28(21):2133–2153, 2014. doi: 10.1080/01694243.2014.948110.
[27] E. Selahi. Elasticity solution of adhesive tubular joints in laminated composites with axial symmetry. Archive of Mechanical Engineering, 65(3):441–456, 2018. doi: 10.24425/124491.
[28] K. Barakhov, D. Dvoretska, and O. Poliakov. One-dimensional axisymmetric model of the stress state of the adhesive joint. In: M. Nechyporuk, V. Pavlikov, D. Kritskiy (eds) I ntegrated Computer Technologies in Mechanical Engineering – 2020. ICTM 2020. Lecture Notes in Networks and Systems, 188:310–319, Springer, Cham, 2021. doi: 10.1007/978-3-030-66717-7_26.
[29] S. Kurennov, N. Smetankina, V. Pavlikov, D. Dvoretskaya, V. Radchenko. Mathematical model of the stress state of the antenna radome joint with the load-bearing edging of the skin cutout. In: D.D. Cioboată, (ed.) International Conference on Reliable Systems Engineering (ICoRSE) – 2021. ICoRSE 2021. Lecture Notes in Networks and Systems, 305:287–295, Springer, Cham, 2022. doi: 10.1007/978-3-030-83368-8_28.
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Authors and Affiliations

Sergei Kurennov
1
ORCID: ORCID
Konstantin Barakhov
1
ORCID: ORCID
Olexander Polyakov
1
ORCID: ORCID
Igor Taranenko
1
ORCID: ORCID

  1. National Aerospace University “Kharkiv Aviation Institute”, Kharkiv, Ukraine
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Abstract

Differences in patients motivating factors influence their attitudes towards the role and quality of tourism agents’ services. This paper identified three major components (treatment-related, economic and travel-related) that explain patients motivation to travel for treatment. The study can help medical tourism agents to refine their marketing strategies and suggest the proper incentives to encourage participation in medical tourism. The research was made on the basis of a critical analysis of scientific literature, surveys and analyses.

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Authors and Affiliations

Magdalena Kachniewska
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Abstract

The idea of emergence in its complex scientific sense was first formulated by the proponents of British emergentism. Emergentism in this perspective was an ontology of evolutionary processes in a broad sense, encompassing the relationships between various levels of existence. However, with the growing popularity of this trend, more and more critical voices against this theory began to appear. This article reviews and compares the critical arguments against British emergentism. Works by Stephen C. Pepper, Charles Baylis and Walter Terence Stace, who pointed to the impossibility of explaining emergent novelty from the perspective of a mechanistic view of the world, are discussed.
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Authors and Affiliations

Marzena Fornal
1
ORCID: ORCID

  1. Akademia Humanistyczno-Ekonomiczna w Łodzi, ul. Sterlinga 26, 90-212 Łódź
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Abstract

In Tractatus Logico‑Philosophicus Wittgenstein referred to a relatively small number of philosophers, and Fritz Mauthner was one of them, although his work is nowadays largely forgotten. In thesis 4.0031 Wittgenstein claimed that his critique of language was quite different from Mauthner’s project. What could it mean then for contemporary discussions on the Tractatus? In this paper it is argued that for Wittgenstein it amounted to rejection of both the resolute and the materialistic interpretation of the Tractatus. On the one hand, Mauthner thought that language could not be exhaustively analyzed by semantics and logic. On the other hand, he believed that one of the greatest illusions of philosophers who investigated language was the conviction that one of the most fundamental features of language is its referential function. These are the claims that the proponents of the radical interpretation read into the Tractatus. But thesis 4.0031 shows that they are wrong. Moreover, in his critique of the referential function of language Mauthner associated states of affairs directly with brain states of a given agent. As for the representatives of the materialistic interpretation of the Tractatus, they attribute to theses 5.54–5.5422 a similar view on the relation between man and the world. Hence, thesis 4.0031 falsifies their reading, as well.
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Bibliography

Arens K. (1995), Mach und Mauthner: Der Fall eines Paradigmenwechsels, w: E. Leinfellner, H. Schleichert (red.), Fritz Mauthner: Das Werk eines Kritischen Denkers, Wien: Böhlau, s. 95–109.

Berlage A. (1994), Empfindung, Ich und Sprache um 1900: Ernst Mach, Hermann Bahr und Fritz Mauthner im Zusammenhang, Frankfurt am Main: Peter Lang.

Brentano F. (1977), Die Abkehr vom Nichtrealen, Hamburg: Meiner.

Conant J. (2009), Rozjaśnienie i nonsens u Fregego i wczesnego Wittgensteina, przeł. T. Zarębski, w: A. Crary, R. Read (red.), Wittgenstein – nowe spojrzenie, Wrocław: Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej, s. 211–256.

Dayton E. (1976), Tractatus 5.54–5.5422, „Canadian Journal of Philosophy” 6, s. 275–283.

Dehnel P. (2014), Ludwig Wittgenstein: teoria a terapia, Warszawa: Wydawnictwo Naukowe PWN.

Diamond C. (2009a), Etyka, wyobraźnia i metoda „Traktatu” Wittgensteina, przeł. P. Mroczkiewicz, w: A. Crary, R. Read (red.), Wittgenstein – nowe spojrzenie, Wrocław: Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej, s. 181–209.

Diamond C. (2009b), Czy Bismarck ma żuka w pudełku? Argument języka prywatnego w „Tractatus logico‑philosophicus”, przeł. M. Gusin, w: A. Crary, R. Read (red.), Wittgenstein – nowe spojrzenie, Wrocław: Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej, s. 307–341.

Gakis D. (2012), Contextual Metaphilosophy: The Case of Wittgenstein, Amsterdam: ILLC.

Hacker P. (2009), Czy próbował to zagwizdać?, przeł. P. Dehnel, w: A. Crary, R. Read (red.), Wittgenstein – nowe spojrzenie, Wrocław: Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej, s. 409–447.

Jacquette D. (1992/1993), Wittgenstein’s Critique of Propositional Attitudes and Russell’s Theory of Judgement, „Brentano Studien” 4, s. 193–220.

Le Rider J. (2012), Fritz Mauthner: scepticisme linguistique et modernité, Paris: Bartillat.

Machlarz A. (2006), Fritza Mauthnera krytyka języka i jej konsekwencje dla metodologii nauk o kulturze, „Przegląd Filozoficzny – Nowa Seria” 15, s. 49–66.

Mauthner F. (1901), Beiträge zu einer Kritik der Sprache, t. 1: Sprache und Psychologie, Stuttgart: J.G. Cotta’sche.

Mauthner F. (1902), Beiträge zu einer Kritik der Sprache, t. 3: Zur Grammatik und Logik, Stuttgart: J.G. Cotta’sche.

Mauthner F. (1906), Die Sprache, Frankfurt am Main: Rütten u. Loening.

Mauthner F. (1922), Fritz Mauthner, w: R. Schmidt (red.), Die Philosophie der Gegenwarten in Selbstdarstellungen, vol. 3, Leipzig: Meiner, s. 120–144.

Mauthner F. (1925), Die Drei Bilder der Welt – ein sprachkritischer Versuch, Erlangen: Verlag der Philosophischen Akademie.

McGuinness B. (2012), Two Cheers for the ‘New’ Wittgenstein?, w: J. Zalabardo (red.), Wittgenstein’s Early Philosophy, Oxford: Oxford University Press, s. 260–272.

Nájera E. (2007), Wittgenstein versus Mauthner: Two Critiques of Language, Two Mysticisms, w: H. Hrachovec, A. Pichler, J. Wang (red.), Papers of the 30th International Wittgenstein Symposium 5–11 August 2007, Kirchberg am Wechsel: ALWS, s. 160–162.

Ostrow M. (2002), Wittgenstein’s „Tractatus”. A Dialectical Interpretation, Cam- bridge: Cambridge University Press. Proops I. (2001), The New Wittgenstein. A Critique, „European Journal of Philosophy” 9, s. 375–404.

Puhl K. (1999), Subjekt und Körper. Untersuchungen zur Subjektkritik bei Wittgenstein und zur Theorie der Subjektivität, Paderborn: Mentis.

Revolledo Novoa Á. (2014), El „Tractatus” y la critica linguística de Fritz Mauthner, „Analítica” 8, s. 41–60.

Rusell B. (1984), Theory of Knowledge, w: tenże, The Collected Papers, vol. 7, London: George Allen & Unwin.

Sass L. (2017), Głębokie niepokoje. Uwagi o Wittgensteinie jako antyfilozofie, przeł. K. Rychter, „Przegląd Filozoficzny – Nowa Seria” 26, s. 7–70.

Seron D. (2021), Brentano and Mauthner on Grammatical Illusions, w: A. Dewalque, C. Gauvry, S. Richard (red.), Philosophy of Language in the Brentano School: Reassesing the Brentanian Legacy, London: Palgrave Macmillan, s. 77–94.

Weiler G. (1970), Mauthner’s Critique of Language, Cambridge: Cambridge University Press. Wittgenstein L. (2000a), Dociekania filozoficzne, przeł. B. Wolniewicz, Warszawa: Wydawnictwo Naukowe PWN.

Wittgenstein L. (2000b), Tractatus logico‑philosophicus [cyt. jako TLP], przeł. B. Wolniewicz, Warszawa: Wydawnictwo Naukowe PWN.
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Authors and Affiliations

Marek Dobrzeniecki
1
ORCID: ORCID

  1. Akademia Katolicka w Warszawie, ul. Dewajtis 3, 01‑815 Warszawa
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Abstract

The text outlines a project of research on modernism in Poland, of which the key element is the heuristic model as the effect of the social reaction to the processes of modernisation. On the one hand, they caused the belief about their negative impact on European civilisation; on the other hand, they triggered the need for a comprehensive regeneration of humanity and its living space.
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Bibliography

Bolecki Włodzimierz, Modalności modernizmu. Studia, analizy, interpretacje, Warszawa 2012.

Griffin Roger, Modernism and Fascism. The Sense of a Beginning under Mussolini and Hitler, Basingstoke 2007.

Juszkiewicz Piotr, Cień modernizmu, Poznań 2013.

Modernism. Designing a New World. 1914–1939, red. Christopher Wilk, London 2006.

Szczerski Andrzej, Transformacja. Sztuka w Europie Środkowo-Wschodniej po 1989 roku, Kraków 2018.

The Cambridge History of Modernism, red. Vincent Sherry, Cambridge 2016.
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Authors and Affiliations

Piotr Juszkiewicz
1
ORCID: ORCID

  1. Uniwersytet im. Adama Mickiewicza, Poznań
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Abstract

In this paper we introduce a self-tuning Kalman filter for fast time-domain amplitude estimation of noisy harmonic signals with non-stationary amplitude and harmonic distortion, which is the problem of a contactvoltage measurement to which we apply the proposed method. The research method is based on the self-tuning of the Kalman filter's dropping-off behavior. The optimal performance (in terms of accuracy and fast response) is achieved by detecting the jump of the amplitude based on statistical tests of the innovation vector of the Kalman filter and reacting to this jump by adjusting the values of the covariance matrix of the state vector. The method's optimal configuration of the parameters was chosen using a statistical power analysis. Experimental results show that the proposed method outperforms competing methods in terms of speed and accuracy of the jump detection and amplitude estimation.

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Authors and Affiliations

Uroš Kovač
Andrej Košir

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