Browsing by Subject "segregation"

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Access status: Restricted ,
Inwentaryzacja i analiza wybranych Punktów Selektywnej Zbiórki Odpadów Komunalnych w Małopolsce
(Data obrony: 2017-10-20) Mitera, Iwona
Wydział Geologii, Geofizyki i Ochrony Środowiska
Praca ukazuje stan Punktów Selektywnej Zbiórki Odpadów Komunalnych w Małopolsce trzy lata po wprowadzeniu Ustawy o odpadach. Wskazana została różnica między funkcjonowaniem PSZOK-ów w poszczególnych gminach i porównanie ich z modelowym PSZOK-iem. Najwięcej odpadów w przeliczeniu na jednego mieszkańca zostało zebranych w gminie Tarnów, natomiast najmniej w gminie Brzesko. Duży wpływ na ilość odpadów dostarczanych do PSZOK-u ma jego lokalizacja, możliwość dostarczenia odpadów z każdej miejscowości w gminie, a także stopień świadomości mieszkańców.
Access status: Open Access ,
The Occurrence of Chunky Graphite in Ductile Cast Iron Solution Strengthened by Silicon
(AGH University Press, 2025) Zaczyński, Artur; Królikowski, Maciej; Sokolnicki, Marek; Nowak, Adam; Guzik, Edward; Burbelko, Andriy A.
Solution strengthened ferritic cast iron is characterised in EN 1563:2018 (and also in ISO 1083:2018) as grades EN-GJS-450-18, EN-GJS-500-14 and EN-GJS-600-10. Machine and plant builders have been using this material in new designs since 2011. The strength and ductile properties, competitive in comparison with the previous classical ductile cast iron grades, make it pos¬sible to reduce the weight of castings. Particularly preferred is grade EN-GJS-600-10 with Rm min. 600 MPa and A min. 10%. Strengthening of the ferritic matrix is possible due to the content of approximately 4.2% of silicon in the cast iron. In casting practice, this material is difficult to produce in a stable manner due to the frequent occurrence of degenerate chunky graphite in the casting structure, resulting in a loss of ductile properties of the cast iron. In this article, an analysis has been made, based on literature, of the occurrence of strong negative segregation of silicon in classical ductile cast iron. The authors’ own research has confirmed the occurrence of chunky graphite in the cast. Dendritic crystallisation of austenite and strong segregation of silicon favours the formation of chunky graphite. A much stronger proportion of silicon was found in the chunky graphite zone, compared to the adjacent ball graphite zone. The introduction of micro-additives into the liquid melt eliminated the presence of chunky graphite in the casting. The applied modifiers of graphite and metal matrix (hybrid modification) seem to be an effective method to stabilise the technological process of this innovative casting material.
Access status: Open Access ,
Together or separated? The segregative and integrative model of cultural accessibility for persons with disabilities
(Wydawnictwa AGH, 2020) Dubiel, Monika Natalia
Culture takes an increasingly important position in the debate about the accessibility of public space for persons with disabilities. Many questions about how to include them in cultural life have emerged. The subject of the present article is a theoretical reflection on actions taken in this area by cultural institutions and non-governmental organizations. Basing on a comparative analysis of two events of such kind, and using the achievements of special pedagogy, I present two models of cultural accessibility for persons with disabilities: the separative and integrative model. I ponder on their advantages and disadvantages. I conclude by claiming that both can be useful in the process of making culture accessible for persons with disabilities, providing that the beneficiaries will be allowed to choose what kind of events they will attend. These considerations accord with the recently burgeoning field of accessibility studies, while Disability Studies serves as a broad theoretical frame.
Access status: Restricted ,
Вплив геологічних чинників на характер нафто- вилучення при завершальній стадії розробки родовища
(Data obrony: 2014-06-16) Bahnii, Tetiana
Wydział Geologii, Geofizyki i Ochrony Środowiska
Object of research - oil fields that are found in the final stages of development. The aim of this work is research the influence of geological factors on the the character of oil recovery in the final stages of field development. The main objective of the work is to evaluate the resource base and problem of elaboration of remaining reserves. On the basis execution analysis substantiated the need to improve methods of control over the features of reservoir systems and a detailed study of the process of reforming the oil beds. It is shown the necessity of using the theory of gravitational segregation to increase production of liquid hydrocarbons through the remaining reserves. Recommended commissioning liquidated and dormant wells and involvement them in the of additional development the exhausted fields for the full extraction the remaining reserves.