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Kamienica „Pod Kruki”, Rynek Główny 25, Kraków. Teraźniejszość historii – nawarstwianie przyszłości

Włodarczyk Małgorzata, Włodarczyk Marcin

Ochrona Dziedzictwa Kulturowego

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2021

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Nr 11

107--126

PL

Architektura to sztuka budowania, czyli gromadzenia trwałych materiałów i takie ich aglomerowanie, aby powstał utwór trwały, funkcjonalny i piękny (jak to opisuje witruwiańska triada: firmitas, utilitas, venustas). Zakończenie budowy oznacza początek trwania budynku. Trwanie architektury prawie zawsze wiąże się z wprowadzaniem zmian. Byłoby wspaniale pozwalać trwać architekturze w nieskończoność, z zachowaniem jej pierwotnych kształtów, faktur, materiałów. Postęp techniczny, zmiany w zakresie potrzeb, wypadki przyrodnicze i historyczne, i mnóstwo innych czynników powoduje konieczność wprowadzania zmian w obiekcie. Trwanie architektury to ciągłe zmiany i dobrze jest, jeżeli powstają one na drodze NAWARSTWIANIA. Nawarstwianie to jak pisanie książki, karta za kartą. Pozwala to potem na „czytanie” architektury, a z nią historii miejsca i ludzi. Nawarstwianie jest ciekawsze niż wymienianie. Strata w wypadku wymiany polega na tym, że poprzedni etap, który został usunięty, katastrofą czy świadomie, jest jak karta z książki wyrwana. Nowoczesna ingerencja w zabytkowy budynek musi szanować poprzednie karty, poprzednie nawarstwienia. Czasami może nawet pewne braki stron uzupełnić albo raczej wskazać. Mądre postępowanie nie kieruje się w takim wypadku wyłącznie poleceniami służb konserwatorskich. Empatia dla zapisów architektury/księgi to wyzwanie dla twórców, szczególnie architektów. Pokażemy taki proces na przykładzie kamienicy o numerze Rynek Główny 25 w Krakowie, która jest przykładem starannego unowocześniania struktury i przestrzeni z zachowywaniem czytelnych śladów. Jest także ukłonem teraźniejszości ku przyszłości nowego ducha tej przestrzeni.

EN

Architecture is the art of building, that is, gathering durable materials and agglomerating them in such a way as to produce a work that is durable, functional, and beautiful (as described by the Vitruvian triad: firmitas, utilitas, venustas). The completion of construction marks the beginning of the building's duration. The duration of architecture almost always involves making changes. It would be wonderful to let architecture last indefinitely, with its original shapes, textures, and materials preserved. Technical progress, changes in needs, natural and historical accidents, and many other factors make it necessary to introduce changes in the object. Persistence of architecture is a constant change and it is good if they are created by EVOLUTION. Layering is like writing a book, page by page. It then allows you to "read" the architecture and with it the history of the place and the people. Layering is more interesting than exchanging. The loss in the case of replacement is that the previous stage that was removed, whether by disaster or intentionally, is like a page torn out of a book. A modern intervention in a historic building must respect the previous pages, the previous layering. Sometimes it can even fill in some missing pages or rather point them out. The wise course of action in such a case is not guided only by the orders of conservation services. Empathy for architectural/book records is a challenge for creators, especially architects. We will show such a process on the example of the tenement house number 25 Market Square in Krakow, which is an example of careful modernization of structure and space while preserving legible traces. It is also a nod of the present to the future of the new spirit of this space.

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Encrustation of inarticulate brachiopods on scaphitid ammonites and inoceramid bivalves from the Upper Cretaceous U. S. Western Interior

Landman N. H., Slattery J. S., Harries P. J.

Acta Geologica Polonica

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2016

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Vol. 66, no. 4

645--662

EN

The inarticulate brachiopod Discinisca is a rare faunal element in the Upper Cretaceous of the U.S. Western Interior. We report two occurrences of encrustation of Discinisca on a scaphitid ammonite (scaphite) and several inoceramids from the lower Maastrichtian Baculites baculus/Endocostea typica Biozones of the Pierre Shale at two localities. Six specimens of Discinisca are present on a single specimen of Hoploscaphites crassus from eastcentral Montana. They occur along the furrow at the mature apertural margin. Because the brachiopods are restricted to the margin and do not occur on the rest of the shell, it is likely that they encrusted the ammonite during its lifetime. If so, this implies that the soft body of the scaphite did not cover the outside surface of the aperture, leaving this area vulnerable to epizoan attachment. A total of 13 specimens of Discinisca are also present on four specimens of Cataceramus? barabini from east-central Wyoming. The brachiopods occur in crevices on the outside of the shells and may have encrusted the inoceramids after their death as the shells began to break down and delaminate, resulting from the decomposition of the organic matrix holding them together. Based on the faunal assemblages at both localities, the presence of Discinisca may indicate environments with either low oxygen levels and/or few predators or competitors.

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Mathematical model of the nitrided layer buildup.

Gut S.

Inżynieria Materiałowa

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1998

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R. XIX, nr 4

1096-1099

EN

The mathematical model of iron nitriding described here considers the kinetics of the chemical reaction at the metal atmosphere interface as well as the diffusion processes occuring inside the metal phase. The chemical composition of the diffusion layer has been determined by the thermodynamical analysis of the chemical reactions taking place between iron and the nitriding atmosphere and by examining the equilibrium state of the Fe-N system. The calculations assume that the flux of nitrogen atoms from the nitriding atmosphere to the steel is proportional to the difference between the equilibrium and the actual nitrogen concentrations at the steel surface. Since carbon affects the interphase equilibrium of the Fe-N system, one can use the model implemented here for predicting the effects of nitriding of steels with low carbon concentration. The model assumes that the kinetics of the reactions taking place across the interphase boundaries in the solid phase is driven by the diffusion process, hence the boundary location can be determined from the differences between nitrogen fluxes across various interphase boundaries.