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Abstract

In this text the author reflects on the semiotic existence of culture discourses in connection with the rapid development of digital technology. The author analyzes selected texts of digital art as examples of the transformation in how works of literature, sculpture, or film exist. The article covers how movable font, which changes in shape and color, participates in shaping literary meanings; the creation of semiotic and interactive figures; the textualization of the user’s actions and body; dematerialization; processuality; narrativization; the temporalizing of sculpture which changes before the eyes of the recipient; the presence of alternative narratives in literature and film; multi-variant plots co-created by the recipient; and the artistic use of other discourses. The author proves that the structure and specificity of the digital sign lies at the base of the changes. The digital sign is immaterial, programmable, and hybrid, and combines aspects of expression, meaning, and action, which makes it efficient.

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Authors and Affiliations

Ewa Szczęsna
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Abstract

In the construction industry carbonate aggregates are commonly used in processes such as concrete production. Aggregates which contain (in their mineral composition) dolomite and an admixture of clay minerals and amorphous silica , can react with alkalis. These reactions can lead to a destructive expansion in concrete. This article explains the mechanisms and the essence of this phenomenon. What is more, some effective and fast methods of the estimation and evaluation of Polish aggregates consisting of carbonate rocks suggests effective methods to determine the usefulness of Polish carbonate aggregates in concrete production are discussed in the paper. Underneath the quality criteria to determine the reactivity of the aggregates will be given. It has been agreed that alkaline reaction and expansion are two separate phenomena related to each other genetically. The aggregates in which reactions caused by clay-siliceous admixtures occur are subjected to expansion. Mineral composition of expansive aggregates as well as their texture indicate that epigenetic dolomites with a distinctive texture are the most reactive. The phase transformations do not end with a complete disintegration of dolomite. They have a cyclical character. They consist of interchangeable reactions of dedolomitization and dolomitization of secondary calcite formed as a result of dolomite's disintegration. The secondary calcite can be effected by Mg+2 ions from pores' solutions and it can form a secondary dolomite. The Mg2+ ions originate from brucite [Mg(OH)2], created in dolomitization process. As a consequence of its reaction with silica, brucite can dissolve and enrich secondary calcite with magnesium. Therefore the reactions which take place in reactive carbonate aggregates and concrete that ismade of it are in fact ongoing processes which consist of dolomite's changes into calcite and vice versa. They are reactions between dedolomitization products (brucite, silica) and products from outside (water, alkalis). The described dedolomitization reactions are a phase of the process that enables expansion due to formation of pressure in inter-granular cracks, with pressure being a result of dry clay-minerals' expansion under the influence of water solutions. Loosening of the aggregate's structure as an effect of dedolomitization reaction makes it easier for water solutions to migrate far into the aggregate's grains followed by their contact with clay minerals.

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Authors and Affiliations

Stefan Góralczyk
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Abstract

The paper presents formulas which can be used to determine steam condensation pressure in a power plant condenser in off-design conditions. The mathematical model provided in the paper makes it possible to calculate the performance of the condenser in terms of condensing steam pressure, cooling water temperature at the condenser outlet, and condenser effectiveness under variable load conditions as a function of three input properties: the temperature and the mass flow rate of cooling water at the condenser inlet and the mass flow rate of steam. The mathematical model takes into account values of properties occurring in reference conditions but it contains no constant coefficients which would have to be established based on data from technical specifications of a condenser or measurement data. Since there are no such constant coefficients, the model of the steam condenser proposed in the paper is universally applicable. The proposed equations were checked against warranty measurements made in the condenser and measurement data gathered during the operation of a 200 MW steam power unit. Based on the analysis, a conclusion may be drawn that the proposed means of determining pressure in a condenser in off-design conditions reflects the condenser performance with sufficient accuracy. This model can be used in optimization and diagnostic analyses of the performance of a power generation unit.
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Bibliography

[1] Salij A., Stepien J.C.: Performance of Turbine Condensers in Power Units of Thermal Systems. Kaprint, Warsaw 2013 (in Polish).
[2] Rusowicz A.: Issues Concerning Mathematical Modelling of Power Condensers. Warsaw University of Technology, Warsaw 2013 (in Polish).
[3] Grzebielec A., Rusowicz A.: Thermal resistance of steam condensation in horizontal tube bundles. J. Power Technol. 91(2011), 1, 41–48.
[4] Laskowski R., Smyk A., Rusowicz A., Grzebielec A.: Selection of cooling water mass flow rate at variable load for 200 MW power unit. Rynek Energii (2020), 3,41– 46 (in Polish).
[5] Durmayaz A., Sogut O. S.: In?uence of cooling water temperature on the e?ciency of a pressurized-water reactor nuclear-power plant. Int. J. Energ. Res. 30(2006), 10, 799–810.
[6] Atria S.I.: The influence of condenser cooling water temperature on the thermal efficiency of a nuclear power plant. Ann. Nucl. Energy 80(2015), 371–378.
[7] Lakovic M.S., et.al. Stojiljkovic M.M. , Lakovic S.V., Stefanovic V.P., Mitrovic D.D.: Impact of the cold end operating conditions on energy efficiency of the steam power plants. Therm. Sci. 14(2010), Suppl., S53–S66.
[8] Laskowski R., Smyk A., Lewandowski J., Rusowicz A.: Cooperation of a steam condenser with a low-pressure part of a steam turbine in off-design conditions. Am. J. Energ. Res. 3(2015), 1, 13–18.
[9] Cengel Y.A.: Heat Transfer. McGraw-Hill, 1998.
[10] Holman J.P.: Heat Transfer. McGraw-Hill, New York 2002.
[11] Weber G.E., Worek W.M.: Development of a method to evaluate the design performance of a feedwater heater with a short drain cooler. J. Eng. Gas Turbines Power 116(1994), 2, 434–441.
[12] Weber G.E., Worek W.M.: The application of a method to evaluate the design performance of a feedwater heater with a short drain cooler. J. Eng. Gas Turbines Power 117(1995), 2, 384–387.
[13] Szkłowier G.G., Milman O.O.: Research and Calculations of Condensing Systems of Steam Turbines. Energoatomizdat, Moskwa 1985 (in Russian).
[14] Pattanayak L., Padhi B.N., Kodamasingh B.: Thermal performance assessment of steam surface condenser. Case Stud. Therm. Eng. 14(2019), 100484.
[15] Beckman G., Heil G.: Mathematische Modelle für die Beurteilung von Kraftwerksprozessen. EKM Mitteillungen (1965), 10.
[16] Laskowski R., Lewandowski J.: Simplified and approximated relations of heat transfer effectiveness for a steam condenser. J. Power Technol. 92(2012), 4, 258– 265.
[17] Laskowski R.M.: A mathematical model of the steam condenser in the changed conditions. J. Power Technol. 92(2012), 2, 101–108.
[18] Szapajko G., Rusinowski H.: Empirical modelling of heat exchangers in a CHP plant with bleed-condensing turbine. Arch. Thermodyn. 29(2008), 4, 177–184.
[19] Szapajko G., Rusinowski H.: Mathematical modelling of steam–water cycle with auxiliary empirical functions application. Arch. Thermodyn. 31(2010), 2, 165–183.
[20] Bahadori A.: Simple method for estimation of effectiveness in one tube pass and one shell pass counter-flow heat exchangers. Appl. Energ. 88(2011), 11, 4191–4196.
[21] Vera-García F., García-Cascales J.R., Gonzálvez-Maciá J., Cabello R., Llopis R., Sanchez D., Torrella E.: A simplified model for shell-and-tubes heat exchangers: practical application. Appl. Therm. Eng. 30(2010), 10, 1231–1241.
[22] Patrascioiu C., Radulescu S.: Modeling and simulation of the double tube heat exchanger. Case studies. Advances in Fluid Mechanics & Heat & Mass Transfer (P. Mastny, V. Perminov, Eds.). In: Proc. 10th WSEAS Int. Conf. on Heat Transfer, Thermal Engineering and Environment (HTE ’12) and Proc. 10th WSEAS Int. Conf. on Fluid Mechanics & Aerodynamics (FMA ’12), Istanbul, Aug. 21–23, 2012, WSEAS, 2012, 35–41.
[23] Patrascioiu C., Radulescu S.: Prediction of the outlet temperatures in triple concentric-tube heat exchangers in laminar flow regime: case study. Heat Mass Transfer 51(2015), 59–66.
[24] Laskowski R.: The black box model of a double-tube counter-flow heat exchanger. Heat Mass Transfer (2014), 10.1007/s00231-014-1482-2.
[25] Chmielniak T., Trela M., Eds.: Diagnostics of New-Generation Thermal Power Plants. Wyd. IMP PAN, Gdansk 2008.
[26] Butrymowicz D., Trela M.: Influence of fouling and inert gases on the performance of regenerative feedwater heaters. Arch. Thermodyn. 23(2002), 1-2, 127–140.
[27] Badur J., Kowalczyk T., Ziółkowski P., Tokarczyk P., Wozniak M.: Study of the effectiveness of the turbine condenser air extraction system using hydro ejectors. Trans. Inst. Fluid-Flow Mach. 131(2016), 41–53.
[28] Tokarczyk P.,Woznizk M., Badur J., Kowalczyk T., Ziółkowski P.: Issue of the temperature of water supplied to hydro ejector and its influence on performance of steam turbine condenser. Energetyka 70(2017), 10 (in Polish).
[29] HEI Standards for Steam Surface Condensers (11th Edn.). Heat Exchange Institute, Cleveland 2012.
[30] Prieto M.M., Suárez I.M., Montanés E.: Analysis of the thermal performance of a church window steam condenser for different operational conditions using three models. Appl. Therm. Eng. 23(2003), 2, 163–178.
[31] Wróblewski W., Dykas S., Rulik S.: Selection of the cooling system configuration for an ultra-critical coal-fired power plant. Energ. Convers. Manage. 76(2013), 554– 560.
[32] Jian-qun Xu, Tao Yang, You-yuan Sun, Ke-yi Zhou, Yong-feng Shi: Research on varying condition characteristic of feedwater heater considering liquid level. Appl. Therm. Eng., 67 (2014), 179–189.
[33] Laskowski R.: Relations for steam power plant condenser performance in off-design conditions in the function of inlet parameters and those relevant in reference conditions. Appl. Therm. Eng. 104(2016), 528–536.
[34] Laskowski R., Smyk A., Rusowicz A., Grzebielec A.: A useful formulas to describe the performance of a steam condenser in off-design conditions. Energy 204(2020) 117910.
[35] Wagner W., Kretzschmar H.J.: International Steam Tables – Properties of Water and Steam based on the Industrial Formulation IAPWS-IF97. Springer, 2008.
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Authors and Affiliations

Rafał Laskowski
1
Adam Smyk
1
Adam Ruciński
1
Jacek Szymczyk
1

  1. Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665 Warsaw, Poland
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Abstract

Paper is considering the purpose and the process of development of last stage blade for intermediate pressure module of 13K215 steam turbine. In the last 20–30 years most of the steam turbine manufacturers were focused on improving such a turbine mainly by upgrading low pressure module. In a result of such a modernization technology were changed from impulse to reaction. The best results of upgrading were given by developing low pressure last stage blade. With some uncertainty and based on state of art knowledge, it can be stand that improving of this part of steam turbine is close to the end. These above indicators show an element on which future research should be focused on – in the next step it should be intermediate pressure module. In the primary design the height of intermediate pressure last stage blade was 500 mm but because of change of technology this value was decreased to 400 mm. When to focus on reaction technology, the height of the last stage blade is related to output power and efficiency. Considered here is the checking the possibility of implementing blades, in a reaction technology, higher than 400 mm and potentially highest. Article shows a whole chosen methodology of topic described above. It leads through the reasons of research, limitations of 13K215 steam turbine, creation of three-dimensional models, fluid flow calculations, mechanical integrity calculations and proposed solutions of design.
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Bibliography

[1] Choudhary A., Prasad E.: Steam Turbine Market by Design (Reaction and Impulse) and Application (Power generation, Petrochemical, Oil & Gas and Others): Global Opportunity Analysis and Industry Forecast, 2020–2027. Market Research Report 2019. Allied Market Research, 2020.
[2] Termuehlen H., Emsperger W.: Steam turbine technology. In: Clean and Efficient Coal-Fired Power Plants. ASME Press, New York 2003, 60–62.
[3] Dominiczak K., Radulski W., Banaszkiewicz M., Mróz K., Bondyra R.: Thermal stress limiter for 13K215 steam turbine retrofit in Połaniec Power Plant, Poland. J. Power Technol. 96(2016), 4, 285–294.
[4] Singh M.P., Lucas G.M.: Blade design and analysis for steam turbines. McGraw- Hill, New York 2011.
[5] Reddy A.S., Ahmed M.D.I., Kumar T.S., Reddy A.V.K., Bharathi W.P.: Analysis of steam turbines. Int. Refer. J. Eng. Sci. 3(2014), 2, 32–48.
[6] Bloch H.P., Singh M.P.: Steam Turbines Design, Application, and Re-Rating. McGraw Hill Prof., 2008, 109–124, 188–218.
[7] Jansen M., Ulm W.: Modern blade design for improving steam turbine efficiency. In: Proc. 1st Eur. Conf.: Turbomachinery – Fluid Dynamic and Thermodynamic Aspects, Erlangen, 1–3 Mar 1995.
[8] Segawa K., Shikano Y., Tsubouchi K., Shibashita N.: Development of a highly loaded rotor blade for steam turbines. JSME Int. J. B-Fuid. Therm. Eng. 45(2002), 4, 881–890.
[9] Shimoyama K., Yoshimzu S, Jeong S., Obayashi S, Yokono Y.: Multi-objective design optimization for a steam turbine stator blade using LES and GA. J. Comput. Sci. Technol. 5(2011), 3, 134–47.
[10] Mohan R.S., Sarkar A., Sekhar A.S.: Vibration analysis of a steam turbine blade. In: Proc. 43rd Int. Cong. Expo. on Noise Control Engineering: Improving the World Through Noise Control., Internoise 2014 (J. Davy, T. McMinn, N. Broner, Ch. Don, L. Dowsett, M. Burgess, Eds.), Melbourne, 16–19 Nov. 2014.
[11] Heidari M., Amini K.: Structural modification of a steam turbine blade. In: Proc. IOP Conf. Ser.: Mater. Sci. Eng. 203 (2017), 012007.
[12] https://www.ansys.com/products/fluids/ansys-blademodeler (accessed 16 April 2021).
[13] https://www.ansys.com (accessed 16 April 2021).
[14] Rusanov A.V., Paschenko N.W., Kosianova A.I.: Method for analythical profiling of axial turbine blade rows. East Eur. J. Power Technol. 2(2009), 7, 32–37 (in Russian).
[15] Lampart P., Ershov S.: 3D shape optimisation of turbomachinery blading. TASK Quart. 6(2002), 1, 113–125.
[16] https://www.ansys.com/products/fluids/ansys-cfx (accessed 16 Apr. 2021).
[17] https://www.ansys.com/products/fluids/ansys-turbogrid (accessed 16 Apr. 2021).
[18] Yoon S., Vandeputte T., Mistry H., Ong J., Stein A.: Loss audit of a turbine stage. J. Turbomach. 138(2016), 5, 051004.
[19] https://www.3ds.com/products-services/catia/ (accessed 10 March 2021).
[20] Stuck Z., Schurdak S.: Steam turbine blade design. In: Proc. 20th Ann. Freshman Conf., 14 April 2012, 2214.
[21] Rzadkowski R., Kubitz L., Maziarz M., Troka P., Dominiczak K., Szczepanik R.: Tip-timing measurements and numerical analysis of last-stage steam turbine mistuned bladed disc during run-down. J. Vib. Eng. Technol. 8(2020), 3, 409– 415.
[22] Rzadkowski R., Lampart P., Kwapisz L., Szymaniak M., Drewczynski M.: Transient thermodynamic, thermal and structure analysis of a steam turbine during its start-up. In: Proc. ASME Turbo Expo 2010: Power for Land, Sea and Air, Vol. 4: Heat Transfer, Glasgow, June 14–18, 2010, GT 2010-22813, 2010, 1103–1112.
[23] Dominiczak K., Rzadkowski R., Radulski W., Szczepanik R.: Online prediction of temperature and stress in steam turbine components using neural network. J. Eng. Gas Turbines Powers 138(2016), 5: 052606.
[24] Singh M.P., Vargo J.J., Schiffer D.M., Dello J.D.: SAFE diagram – A design and reliability tool for turbine blading. In: Proc. 17th Turbomachinery Symp. Houston, 1988, 93–102, Texas A&M Univ. Turbomach. Lab.
[25] Singh M.P.: History of evolution, progress and application of SAFE diagram for tuned and mistuned systems. In: Proc. 42nd Turbomachinery Symp., Houston, Oct. 1-3, 2013, Texas A&M Univ. Turbomach. Lab.
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Authors and Affiliations

Radoslaw Bondyra
1
Jan Przytulski
1
Krzysztof Dominiczak
2

  1. GE Power Ltd, Stoczniowa 2, 82-300 Elblag, Poland
  2. Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdansk, Poland
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Abstract

The Polish political transformation of 1989 brought significant changes not only on the political and social levels but also on the economic level. The Polish economy, which until then had been a centrally planned economy, had to be rapidly changed into a free market economy. As a result of this, a lot of areas of the economy had to be transformed including the mining industry, especially hard-coal mining. In 1990, there were seventy-one mines in operation in Poland, employing nearly 400,000 people. The process of decommissioning these mines, which continues to this day, began in 1994. Walbrzych coal mines were among the first to be liquidated. Poland has long been dependent on coal for energy production, but the country is facing increasing pressure in the transition to cleaner and more sustainable energy sources in order to reduce carbon emissions and mitigate the effects of climate change in order to fulfil EU climate policy assumptions. Civil society organizations in Poland were associated with the political transformation, as the changes in the system has opened the doors for the social participation in decision-making processes. Civil society organizations in Poland have been actively pushing for policies and initiatives that promote renewable energy, energy efficiency, and the phasing out of coal. However, it should be underlined that the role of civil society in energy transformation is crucial as on the one hand, it should be an advocate of change, but on the other hand, civil society has to take an active part in the discussion on the challenges of the transformation, such a change in the employment structure which is an inevitable consequence of the energy transition. The scope of the paper is to provide a set of tools for the civil society participating in energy transformation processes.
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Authors and Affiliations

Olga Julita Janikowska
1
ORCID: ORCID

  1. The Division of Strategic Research, Mineral and Energy Economy Research Institute of the Polish Academy ofSciences, Poland
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Abstract

The article is an attempt to present circumstances that nowadays determine negotiating, conclusion and performance of a multimodal transport contract in Poland. Author focuses in particular on parties’ approach, their business and legal conscience in this respect, as well as their decisions’ practical consequences. Doctrinal aspects of a multimodal transport contract are taken into account only as long as it is essential in examining the most common practices of the parties to the contract. Due to particular character of this publication, the method of author’s views presentation is as brief as possible.

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Authors and Affiliations

Krzysztof Kochanowski
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Abstract

The paper presents a one-dimensional mathematical model for simulating the transient processes which occur in the liquid flat-plate solar collector tubes. The proposed method considers the model of collector tube as one with distributed parameters. In the suggested method one tube of the collector is taken into consideration. In this model the boundary conditions can be time-dependent. The proposed model is based on solving the equation describing the energy conservation on the fluid side. The temperature of the collector tube wall is determined from the equation of transient heat conduction. The derived differential equations are solved using the implicit finite difference method of iterative character. All thermo-physical properties of the operating fluid and the material of the tube wall can be computed in real time. The time-spatial heat transfer coefficient at the working fluid side can be also computed on-line. The proposed model is suitable for collectors working in a parallel or serpentine tube arrangement. As an illustration of accuracy and effectiveness of the suggested method the computational verification was carried out. It consists in comparing the results found using the presented method with results of available analytic solutions for transient operating conditions. Two numerical analyses were performed: for the tube with temperature step function of the fluid at the inlet and for the tube with heat flux step function on the outer surface. In both cases the conformity of results was very good. It should be noted, that in real conditions such rapid changes of the fluid temperature and the heat flux of solar radiation, as it was assumed in the presented computational verification, do not occur. The paper presents the first part of the study, which aim is to develop a mathematical model for simulating the transient processes which occur in liquid flat-plate solar collectors. The experimental verification of the method is a second part of the study and is not presented in this paper. In order to perform this verification, the mathematical model would be completed with additional energy conservation equations. The experimental verification will be carry out in the close future.

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Authors and Affiliations

Wiesław Zima
Piotr Dziewa
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Abstract

Two-dimensional numerical investigations of the fluid flow and heat transfer have been carried out for the laminar flow of the louvered fin-plate heat exchanger, designed to work as an air-source heat pump evaporator. The transferred heat and the pressure drop predicted by simulation have been compared with the corresponding experimental data taken from the literature. Two dimensional analyses of the louvered fins with varying geometry have been conducted. Simulations have been performed for different geometries with varying louver pitch, louver angle and different louver blade number. Constant inlet air temperature and varying velocity ranging from 2 to 8 m/s was assumed in the numerical experiments. The air-side performance is evaluated by calculating the temperature and the pressure drop ratio. Efficiency curves are obtained that can be used to select optimum louver geometry for the selected inlet parameters. A total of 363 different cases of various fin geometry for 7 different air velocities were investigated. The maximum heat transfer improvement interpreted in terms of the maximum efficiency has been obtained for the louver angle of 16° and the louver pitch of 1.35 mm. The presented results indicate that varying louver geometry might be a convenient way of enhancing performance of heat exchangers.

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Authors and Affiliations

Tomasz Muszyński
Sławomir Marcin Kozieł
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Abstract

Gaston Milhaud (1858–1918) was a French modern philosopher, who, having started from mathematics, came to philosophy (especially epistemology) and history of science. His works on the history of science were devoted to Greek science and modern science. Milhaud in his papers claimed that important concepts and principles of science (in different disciplines) result from decisions that simultaneously transcend both experience and logic. He emphasized the role of free creation and activity of the mind. The author discusses central problems of Milhaud’s thought, especially the problem of the relationship between science and philosophy.

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Authors and Affiliations

Ryszard Kleszcz
ORCID: ORCID
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Abstract

The article presents an analysis of the Armenian translation of Plato’s Laws dating back to the so-called Hellenizing school (sixth–eighth century AD). The analysis is predominantly a linguistic one, although issues such as stylistics are touched upon as well. Thorough examination of the manifold ways of translating various Greek grammatical structures present in the text contributes to the wider discussion surrounding its dating.
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Authors and Affiliations

Roberto Peressin
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Abstract

In the present article the Author analyses the changes in historiography in Communist Poland after the Second World War.
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Authors and Affiliations

Rafał Stobiecki
ORCID: ORCID
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Abstract

This is a comparative analysis of the key ideas regarding nation-building in the writ-ings of Adam Mickiewicz and Patrick Pearse, who have gone down to history as icons of the Polish and Irish national revival. In the case of Mickiewicz the article focuses on Dziady – Część III (Forefathers’ Eve – Part III), Konrad Wallenrod, Księgi narodu polskiego i pielgrzymstwa polskiego (Books of the Polish Nation and Poland’s Pilgrimage); the Irish materials include Pearce’s dramas The King and The Singer as well as Theobald Wolfe Tone’s ‘Speech from the Dock’. A trope common to all of them is the concept of ‘a beauti-ful, awesome voice’ / ‘a traitorous song’: literature as a mighty force that can create a community dedicated to the national cause. A comparison of passages that articulate the messianic idea indicates that, though understood by either writer in his own way, they both envision it as a catalyst turning nation-building literature into an apotheosis of martyrdom and death – a process which could be described as axiological metabolism. The article also examines the paradoxes of the projections of the myth of national unity in the work of both writers, especially in Mickiewicz’s Pan Tadeusz and Pearse’s short story ‘In My Garden’.
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Authors and Affiliations

Dobromiła Księska
1
ORCID: ORCID

  1. Szkoła Doktorska Nauk Humanistycznych UJ

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