Repozytorium Uniwersytetu Śląskiego RE-BUŚ
Not a member yet
23505 research outputs found
Sort by
Ołów w środowisku
Get PDFW publikacji zostały opisane zagadnienia związane z naturalnym występowaniem ołowiu w środowisku oraz jego wtórnymi, antropogenicznymi koncentracjami w glebach, wodach i pyłach atmosferycznych. Przedstawiono zmieniające się kierunki wykorzystania ołowiu w okresie ostatnich kilku tysięcy lat. Zwrócono uwagę, że stosunkowo niskie temperatury hutniczej produkcji oraz korzystne właściwości sprzyjały masowemu wykorzystaniu ołowiu, jednego z siedmiu najwcześniej poznanych metali. Wskazano, że jedną z przyczyn szybko rosnącego wydobycia ołowiu było pozyskiwanie srebra ze złóż galeny. Omówiono geochemię i mineralogię ołowiu w kontekście koncentracji oraz form występowania tego pierwiastka w różnych środowiskach litosfery. Silna skłonność ołowiu do wiązania się z siarką powoduje, że najczęściej występuje w siarczku Pb, galenie. W etapie utlenienia powstaje węglan Pb, cerusyt, znacznie rzadziej, w obecności jonów innych pierwiastków, np.: P, As, Mo, V, Cr tworzy fosforany, arseniany, molibdeniany, wanadyniany i chromiany ołowiu. Scharakteryzowano geologię oraz zespół minerałów występujących w śląsko-krakowskich złożach rud Zn-Pb. Stosunkowa niska aktywność geochemiczna jonów ołowiu Pb2+ powoduje, że w warunkach naturalnych transfer ołowiu do organizmów żywych jest ograniczony, jednak znacząco rośnie dla syntetycznych minerałów lub związków ołowiu.
Opisano metody przeróbki rud Zn-Pb oraz hutniczej produkcji ołowiu, która od XIX wieku była związana z szybko rosnącą produkcją cynku, dlatego jednym ze znaczących źródeł emisji ołowiu są huty cynku. Wskazano na znaczącą rolę regionu śląsko-krakowskiego dla globalnej produkcji ołowiu, cynku i kadmu w okresie XIX i na początku XX wieku. Przedstawiono wielkość produkcji ołowiu na świecie i w Polsce. W kontekście rożnych zastosowań ołowiu (akumulatory, stopy, farby, dodatek czteroetylku Pb do benzyn itp.) wskazano na najważniejsze źródła emisji ołowiu i jego związków do gleb, wód i atmosfery. Zestawiono źródła i wielkość
emisji Pb w Europie w latach 1955–2010.
Bardziej szczegółowe informacje dotyczące emisji ołowiu do środowiska odnoszą się do regionu śląsko-krakowskiego, gdzie od ponad 200 lat liczne huty produkowały ołów, cynk oraz stopy metali nieżelaznych, co wiązało się z lokalnym i regionalnym zanieczyszczeniem środowiska metalami ciężkimi. Szczególnie silne, toksyczne oddziaływania na organizmy żywe wywiera ołów, szczególnie jego syntetyczne formy emitowane przez huty oraz zakłady wykorzystujące ten metal. Okresy największej prosperity śląskiego hutnictwa ołowiu, cynku i kadmu wiązały się ze wzrostem zatrudnienia, z rozwojem gospodarczym i ogromnymi zyskami dla właścicieli. Z drugiej strony przyczyniły się do katastrofalnego zanieczyszczenia środowiska oraz trudnej do oszacowania skali zachorowań dzieci i dorosłych w wyniku zatrucia ołowiem
Qualitative Data Clustering to Detect Outliers
Get PDFDetecting outliers is a widely studied problem in many disciplines, including statistics, data mining, and machine learning. All anomaly detection activities are aimed at identifying cases of unusual behavior compared to most observations. There are many methods to deal with this issue, which are applicable depending on the size of the data set, the way it is stored, and the type of attributes and their values. Most of them focus on traditional datasets with a large number of quantitative attributes. The multitude of solutions related to detecting outliers in quantitative sets, a large and still has a small number of research solutions is a problem detecting outliers in data containing only qualitative variables. This article was designed to compare three different categorical data clustering algorithms: K-modes algorithm taken from MacQueen’s K-means algorithm and the STIRR and ROCK algorithms. The comparison concerned the method of dividing the set into clusters and, in particular, the outliers detected by algorithms. During the research, the authors analyzed the clusters detected by the indicated algorithms, using several datasets that differ in terms of the number of objects and variables. They have conducted experiments on the parameters of the algorithms. The presented study made it possible to check whether the algorithms similarly detect outliers in the data and how much they depend on individual parameters and parameters of the set, such as the number of variables, tuples, and categories of a qualitative variable
Kalifornijska flânerie w powieści Karoliny Waclawiak How to Get into the Twin Palms
Get PDFUnlike most of the immigration novels created by contemporary Polish American female writers, How to Get into the Twin
Palms written by Karolina Waclawiak, does not focus on the hardships of assimilation into American culture but depicts
experiments with ethnic cross-dressing. Waclawiak, a representative of the so-called one-and-a half generation of Polish
immigrants from the 1980s Solidarity wave, reinvents the immigration story as her protagonist, Zosia, a Polish American
resident of Los Angeles, yearns to become Russian in order to be granted entrance to the mysterious and appealing Russian
nightclub. The protagonist’s transformation into Anya goes hand in hand with her exploration of the City of Angels, the
postmodern megalopolis with neon lights and pavements reaching the horizon. Thus, Zosia/Anya becomes a Californian
flâneuse, the urban scrutinizer and strolling observer of the what is known as the most photographed but least photogenic
city in the United States. In this context, the main aim of this presentation will be to explore Californian flânerie in Waclawiak’s
novel: while walking down the city streets the narrator flâneuse reflects on her home (Polish) culture, underscores
her status as an immigrant outsider, and delves into the questions of alienation as well as defamiliarization. Hence, one
may assume that flânerie itself contributes to the transformation of Waclawiak’s protagonist
Modele publikacyjne w nauce o kulturze
Get PDFThis article examines quantitatively the patterns of research phenomena being observed
during last years in the field of cultural studies basing on the data acquired from Scopus – one of
the biggest scientific bibliographic databases. The authors of the article were inspired to undertake
such research from the recent amendment of Polish legislation called the Constitution for Science,
which promotes inter-institutional and international research. Therefore, the results of the investigation
were prepared for all countries publishing in Scopus indexed literature, but with particular
emphasis on Polish participation.
The conducted research allowed to identify the dominant publication languages in the studied
field, the quantitative publication share of individual countries, the average number of authors per
one publication from a given country, but also made it possible to identify countries willing to cooperate
with each other, which was visualized on the so-called cooperation maps.
In addition, Polish and global scientific productivity measured by the number of articles was
embedded in the so-called Polish “ministerial list” of journals, which may give Polish scientists of
the field of cultural studies hints on the choice of a journal dealing with relevant topics and being
indexed in the Scopus database
Dynamic villages in the hinterland of a polycentric region : case study of the Górnośląsko-Zagłębiowska Metropolis in Poland
Get PDFThis article examines the growth of the labour market and entrepreneurship in a metropolitan
area. In particular, the study attempts to answer how the economy of the rural regions is
developing in the hinterland of a large urban complex in Southern Poland, which is transforming
from a post-industrial conurbation into a metropolitan area. The study applied Florence’s local
specialization index, statistical measures, dynamics indexes, and Pearson’s correlation index. The
research results show that the local economy, including the labour market, is systematically growing.
Rural communes refer to multifunctional development based on services, and they represent diverse
economic specializations. They are subject to economies of scale and benefit from the proximity and
impact of a large urban complex. The economic growth of rural areas in the hinterland is related to
entrepreneurship, convenient location in relation to cities, and migration from cities to villages
Małgorzata Płomińska: "Juristische Fachphraseologie – Zwischen Konvention Und Routine". Berlin: Peterlang. 2019. ISBN 978-3-631-79361-9. 420 S. [recenzja]
Get PDFRecenzja książki, Małgorzata Płomińska: "Juristische Fachphraseologie – Zwischen Konvention Und Routine". Berlin: Peterlang. 2019. ISBN 978-3-631-79361-9. 420 S
The English Interjection "Oh" In Specialist Literature And Translation
Get PDFThe following paper aims to analyse the functions of the interjection oh in the English corpus provided by Helen Fielding’s Bridget Jones’s Diary and its translation into Polish. Once the functions and patterns of the form are defined, the translation strategies employed are analysed. The study reveals which translational strategies proposed by Cuenca (2006) are employed in the translation of oh: literal translation, using an interjection with dissimilar form but having the same meaning, using a non‑interjective structure but with similar meaning, using an interjection with a different meaning, omission, or addition of usually a primary interjection. The analysis of the interjection oh is preceded by a very brief presentation of various approaches focusing on the problem of defining and classifying interjections, as well as the presentation of the research concerning the interjection oh and its description in the specialist literature
Agnieszka Leńko-Szymańska "Defining And Assessing Lexical Proficiency", Warsaw: University of Warsaw, Institute of Applied Linguistics, 2019. ISBN 978-83-95-1407-2-3, 370 pp [recenzja]
Get PDFRecenzja książki, Agnieszka Leńko-Szymańska "Defining And Assessing Lexical Proficiency", Warsaw: University of Warsaw, Institute of Applied Linguistics, 2019. ISBN 978-83-95-1407-2-3, 370 pp
The dielectric response of phenothiazine‑based glass‑formers with different molecular complexity
Get PDFWe examined a series of structurally related glass-forming liquids in which a phenothiazine-based
tricyclic core (PTZ) was modified by attaching n-alkyl chains of different lengths (n = 4, 8, 10). We
systematically disentangled the impact of chemical structure modification on the intermolecular
organization and molecular dynamics probed by broadband dielectric spectroscopy (BDS). X-ray
diffraction (XRD) patterns evidenced that all PTZ-derivatives are not ‘ordinary’ liquids and form
nanoscale clusters. The chain length has a decisive impact on properties, exerting a plasticizing effect
on the dynamics. Its elongation decreases glass transition temperature with slight impact on fragility.
The increase in the medium-range order was manifested as a broadening of the dielectric loss peak
reflected in the lower value of stretching parameter βKWW. A disagreement with the behavior observed
for non-associating liquids was found as a deviation from the anti-correlation between the value of
βKWW and the relaxation strength of the α-process. Besides, to explain the broadening of loss peak in
PTZ with the longest (decyl) chain a slow Debye process was postulated. In contrast, the sample with
the shortest alkyl chain and a less complex structure with predominant supramolecular assembly
through π–π stacking exhibits no clear Debye-mode fingerprints. The possible reasons are also
discussed