Repozytorium Uniwersytetu Śląskiego RE-BUŚ
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Anomalous transport in driven periodic systems: distribution of the absolute negative mobility effect in the parameter space
No full textAbsolute negative mobility is one of the most paradoxical forms of anomalous transport
behaviour. At the first glance it contradicts the superposition principle and the second law of
thermodynamics, however, its fascinating nature bridges nonlinearity and nonequilibrium in
which these fundamental rules are no longer valid.We consider a paradigmatic model of the
nonlinear Brownian motion in a driven periodic system which exhibits the absolute negative
mobility. So far research on this anomalous transport feature has been limited mostly to the single
case studies due to the fact that this model possesses the complex multidimensional parameter
space. In contrast, here we harvest GPU supercomputers to analyze the distribution of negative
mobility in the parameter space. We consider nearly 109 parameter regimes to discuss how the
emergence of negative mobility depends on the system parameters as well as provide the optimal
ones for which it occurs most frequently
Petrochronological Evidence for a Three-Stage Magmatic Evolution of the Youngest Nepheline Syenites from the Ditrau Alkaline Massif, Romania
No full textThe Ditr«u Alkaline Massif (DAM) is an igneous massif in the Eastern Carpathian Moun-tains of Romania. Numerous geochronological and geochemical studies have proposed a long formation history (ca. 70 m.y.) of the DAM from Middle Triassic to Cretaceous times, which is hardly reconcilable with geochemical evolutionary models and the geotectonic environment during the Mesozoic in this part of the Eastern Carpathian Mountains. In order to put tighter age constraints on the igneous processes forming the DAM, two nepheline syenites from the so-called Ghidut¸ and L«zarea suites were investigated. Based on field and geochemical evidence, the two rock suites represent the younger part of the DAM intrusives. Detailed zircon characterization, in situ zircon SIMS U-Pb dating, and geochemical modelling were used to establish the timing of zircon crystallization and thus to set time constraints on the igneous formation of these parts of the DAM. The intrusion of the dated Ghidut¸ suite sample took place at 232 ± 1 Ma in the Karnium, whereas the L«zarea suite nepheline syenite sample was intruded at 225 ± 1 Ma in the Norium. Together with published geochemical and geochronological data, three different magmatic events can thus be identified: Ghidut¸ suite at 231.1 ± 0.8 Ma, Ditr«u suite at 230.7 ± 0.2 Ma, and L«zarea suite at 224.9 ± 1.1 Ma. Although the ages of the events 1 and 2 are statistically indistinguishable, the combination of geochemical and petrochronological data certainly favor independent intrusion events. Thus, the igneous events forming the younger parts of the DAM encompassed a time span of ca. 13 m.y. Additionally, each igneous event can tentatively be divided in an older syenitic stage and a younger nepheline syenitic one, each with an age difference of some 100,000 years. No indication of any post 215 Ma igneous or hydrothermal activity was found. The new data and interpretation significantly improve our understanding of the temporal and geochemical evolution of the DAM and of alkaline complexes as such, demonstrating that the underlying igneous processes (melt generation, assimilation, fractionation, and the duration of plumbing systems) work on the same time scale for both sorts of magmatic rock suites
From the "rally 'round the flag" effect to a social crisis of confidence : Poland and Slovakia in the first year of the covid-19 pandemic
Get PDFThe pandemic COVID-19 became a challenge for both societies and
governments. While most countries and citizens reacted similarly to
the unknown strength of the virus at the start of the pandemic, the
situation in each country began to vary more and more each month.
Poland and Slovakia are interesting cases in this context. One year
after the WHO declared a pandemic, these countries are
experiencing one of the worst crises in history. In Poland, despite the
initial social mobilisation, after a very short time, many government
decisions ceased to be perceived as protecting citizens. In the first
period of the pandemic, the Slovak government coped with the
situation much better, which changed significantly in the autumn of
2020. The article aims to analyse how an active “rally 'round the flag”
effect and the resulting natural potential for social mobilisation to
fight the pandemic were wasted in Poland and Slovakia due to
irresponsible political decisions undermining the citizens 'trust in
the governments' good intentions
Diels-Alder cycloaddition with CO, CO2, SO2, or N2 extrusion : a powerful tool for material chemistry
Get PDFPhenyl, naphthyl, polyarylphenyl, coronene, and other aromatic and polyaromatic moieties
primarily influence the final materials’ properties. One of the synthetic tools used to implement (hetero)
aromatic moieties into final structures is Diels–Alder cycloaddition (DAC), typically combined
with Scholl dehydrocondensation. Substituted 2-pyranones, 1,1-dioxothiophenes, and, especially,
1,3-cyclopentadienones are valuable substrates for [4 + 2] cycloaddition, leading to multisubstituted
derivatives of benzene, naphthalene, and other aromatics. Cycloadditions of dienes can be carried
out with extrusion of carbon dioxide, carbon oxide, or sulphur dioxide. When pyranones, dioxothiophenes,
or cyclopentadienones and DA cycloaddition are aided with acetylenes including masked
ones, conjugated or isolated diynes, or polyynes and arynes, aromatic systems are obtained. This
review covers the development and the current state of knowledge regarding thermal DA cycloaddition
of dienes mentioned above and dienophiles leading to (hetero)aromatics via CO, CO2, or
SO2 extrusion. Particular attention was paid to the role that introduced aromatic moieties play in
designing molecular structures with expected properties. Undoubtedly, the DAC variants described
in this review, combined with other modern synthetic tools, constitute a convenient and efficient way
of obtaining functionalized nanomaterials, continually showing the potential to impact materials
sciences and new technologies in the nearest future
Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application
Get PDFThis study presented an analysis of the TeO2/GeO2 molar ratio in an oxide glass system. A family of melt-quenched glasses with the range of 0–35 mol% of GeO2 has been characterized by using DSC, Raman, MIR, refractive index, PLE, PL spectra, and time-resolved spectral measurements. The increase in the content of germanium oxide caused an increase in the transition temperature but a decrease in the refractive index. The photoluminescence spectra of europium ions were examined under the excitation of 465 nm, corresponding to 7F0 → 5D2 transition. The PSB (phonon sidebands) analysis was carried out to determine the phonon energy of the glass hosts. It was reported that the red (5D0 → 7F2) to orange (5D0 → 7F1) fluorescence intensity ratio for Eu3+ ions decreased from 4.49 (Te0Ge) to 3.33 (Te15Ge) and showed a constant increase from 4.58 (Te20Ge) to 4.88 (Te35Ge). These optical features were explained in structural studies, especially changes in the coordination of [4]Ge to [6]Ge. The most extended lifetime was reported for the Eu3+ doped glass with the highest content of GeO2. This glass was successfully used for the drawing of optical fiber
Strong Law of Large Numbers for Iterates of Some Random-Valued Functions
Get PDFAssume (Ω,A,P) is a probability space, X is a compact metric space with the σ-algebra B of all its Borel subsets and f:X×Ω→X is B⊗A-measurable and contractive in mean. We consider the sequence of iterates of f defined on X×ΩN by f0(x,ω)=x and fn(x,ω)=f(fn−1(x,ω),ωn) for n∈N, and its weak limit π. We show that if ψ:X→R is continuous, then for every x∈X the sequence (1n∑nk=1ψ(fk(x,⋅)))n∈N converges almost surely to ∫Xψdπ. In fact, we are focusing on the case where the metric space is complete and separable
National identity predicts public health support during a global pandemic
Get PDFJay J. Van Bavel, Valerio Capraro, Hallgeir Sjåstad, John B. Nezlek, Tomislav Pavlović, Mark Alfano, Michele J. Gelfand, Flavio Azevedo, Michèle D. Birtel, Patricia L. Lockwood, Robert Malcolm Ross, Koen Abts, Elena Agadullina, John Jamir Benzon Aruta, Sahba Nomvula Besharati, Alexander Bor, Becky L. Choma, Charles David Crabtree, William A. Cunningham, Koustav De, Waqas Ejaz, Christian T. Elbaek, Andrej Findor, Daniel Flichtentrei, Renata Franc, Biljana Gjoneska, June GruberEstrella Gualda, Yusaku Horiuchi, Toan Luu Duc Huynh, Augustin Ibanez, Mostak Ahamed Imran, Jacob Israelashvili, Katarzyna Jasko, Jaroslaw Kantorowicz, Elena Kantorowicz-Reznichenko, André Krouwel, Michael Laakasuo, Claus Lamm, Caroline Leygue, Ming-Jen Lin, Mohammad Sabbir Mansoor, Antoine Marie, Lewend Mayiwar, Honorata Mazepus, Cillian McHugh, John Paul Minda, Panagiotis Mitkidis, Andreas Olsson, Tobias Otterbring, Dominic J. Packer, Anat Perry, Michael Bang Petersen, Arathy Puthillam, Julián C. Riaño-Moreno, Tobias Rothmund, Hernando Santamaría-García, Petra C. Schmid, Drozdstoy Stoyanov, Shruti Tewari, Bojan Todosijević, Manos Tsakiris, Hans H. Tung, Radu G. Umbreș, Edmunds Vanags, Madalina Vlasceanu, Andrew Vonasch, Meltem Yucel, Yucheng Zhang, Mohcine Abad, Eli Adler, Narin Akrawi, Hamza Alaoui Mdarhri, Hanane Amara, David M. Amodio, Benedict G. Antazo, Matthew Apps, F. Ceren Ay, Mouhamadou Hady Ba, Sergio Barbosa, Brock Bastian, Anton Berg, Maria P. Bernal-Zárate, Michael Bernstein, Michał Białek, Ennio Bilancini, Natalia Bogatyreva, Leonardo Boncinelli, Jonathan E. Booth, Sylvie Borau, Ondrej Buchel, C. Daryl Cameron, Chrissie F. Carvalho, Tatiana Celadin, Chiara Cerami, Hom Nath Chalise, Xiaojun Cheng, Luca Cian, Kate Cockcroft, Jane Conway, Mateo Andres Córdoba-Delgado, Chiara Crespi, Marie Crouzevialle, Jo Cutler, Marzena Cypryańska, Justyna Dabrowska, Michael A. Daniels, Victoria H. Davis, Pamala N. Dayley, Sylvain Delouvee, Ognjan Denkovski, Guillaume Dezecache, Nathan A. Dhaliwal, Alelie B. Diato, Roberto Di Paolo, Marianna Drosinou, Uwe Dulleck, Jānis Ekmanis, Arhan S. Ertan, Tom W. Etienne, Hapsa Hossain Farhana, Fahima Farkhari, Harry Farmer, Ali Fenwick, Kristijan Fidanovski, Terry Flew, Shona Fraser, Raymond Boadi Frempong, Jonathan A. Fugelsang, Jessica Gale, E. Begoña Garcia-Navarro, Prasad Garladinne, Oussama Ghajjou, Theofilos Gkinopoulos, Kurt Gray, Siobhán M. Griffin, Bjarki Gronfeldt, Mert Gümren, Ranju Lama Gurung, Eran Halperin, Elizabeth Harris, Volo Herzon, Matej Hruška, Guanxiong Huang, Matthias F. C. Hudecek, Ozan Isler, Simon Jangard, Frederik J. Jørgensen, Frank Kachanoff, John Kahn, Apsara Katuwal Dangol, Oleksandra Keudel, Lina Koppel, , Mika Koverola, Emily Kubin, Anton Kunnari, Yordan Kutiyski, Oscar Laguna, Josh Leota, Eva Lermer, Jonathan Levy, Neil Levy, Chunyun Li, Elizabeth U. Long, Chiara Longoni, Marina Maglić, Darragh McCashin, Alexander L. Metcalf, Igor Mikloušić, Soulaimane El Mimouni, Asako Miura, Juliana Molina-Paredes, César Monroy-Fonseca, Elena Morales-Marente, David Moreau, Rafał Muda, Annalisa Myer, Kyle Nash, Tarik Nesh-Nash, Jonas P. Nitschke, Matthew S. Nurse, Yohsuke Ohtsubo, Victoria Oldemburgo de Mello, Cathal O’Madagain, Michal Onderco, M. Soledad Palacios-Galvez, Jussi Palomäki, Yafeng Pan, Zsófia Papp, Philip Pärnamets, Mariola Paruzel-Czachura, Zoran Pavlović, César Payán-Gómez, Silva Perander, Michael Mark Pitman, Rajib Prasad, Joanna Pyrkosz-Pacyna, Steve Rathje, Ali Raza, Gabriel G. Rêgo, Kasey Rhee, Claire E. Robertson, Iván Rodríguez-Pascual, Teemu Saikkonen, Octavio Salvador-Ginez, Waldir M. Sampaio, Gaia C. Santi, Natalia Santiago-Tovar, David Savage, Julian A. Scheffer, Philipp Schönegger, David T. Schultner, Enid M. Schutte, Andy Scott, Madhavi Sharma, Pujan Sharma, Ahmed Skali, David Stadelmann, Clara Alexandra Stafford, Dragan Stanojević, Anna Stefaniak, Anni Sternisko, Augustin Stoica, Kristina K. Stoyanova, Brent Strickland, Jukka Sundvall, Jeffrey P. Thomas, Gustav Tinghög, Benno Torgler, Iris J. Traast, Raffaele Tucciarelli, Michael Tyrala, Nick D. Ungson, Mete S. Uysal, Paul A. M. Van Lange, Jan-Willem van Prooijen, Dirk van Rooy, Daniel Västfjäll, Peter Verkoeijen, Joana B. Vieira, Christian von Sikorski, Alexander Cameron Walker, Jennifer Watermeyer, Erik Wetter, Ashley Whillans, Robin Willardt, Michael J. A. Wohl, Kaidi Wu, Yuki Yamada, Onurcan Yilmaz, Kumar Yogeeswaran, Carolin-Theresa Ziemer, Rolf A. Zwaan, Paulo S. BoggioChanging collective behaviour and supporting non-pharmaceutical interventions is an
important component in mitigating virus transmission during a pandemic. In a large international
collaboration (Study 1, N = 49,968 across 67 countries), we investigated selfreported
factors associated with public health behaviours (e.g., spatial distancing and stricter
hygiene) and endorsed public policy interventions (e.g., closing bars and restaurants) during
the early stage of the COVID-19 pandemic (April-May 2020). Respondents who reported
identifying more strongly with their nation consistently reported greater engagement in
public health behaviours and support for public health policies. Results were similar for
representative and non-representative national samples. Study 2 (N = 42 countries) conceptually
replicated the central finding using aggregate indices of national identity (obtained
using the World Values Survey) and a measure of actual behaviour change during the
pandemic (obtained from Google mobility reports). Higher levels of national identification
prior to the pandemic predicted lower mobility during the early stage of the pandemic
(r = −0.40). We discuss the potential implications of links between national identity, leadership,
and public health for managing COVID-19 and future pandemics
Interpersonal Competences and Attitude to Online Collaborative Learning (OCL) among Future Pedagogues and Educators - A Polish and Portuguese Perspective
Get PDFInterpersonal competences in relationship building, collaboration and teamwork are essential
both in F2F education and in distance or hybrid styles of education. In the face of the COVID-19
crisis, as well as previous trends, some or all of the higher education didactics were transferred
to the online environment. In this context, the Online Collaborative Learning (OCL) model, now
known as collaborativism, is gaining importance. This research aims to diagnose and compare the
level of interpersonal competences and attitude in the OCL model among students preparing for
the profession of an educator, pedagogue or teacher in the autonomous region of Madeira and in
Poland. Quantitative studies were conducted using the Interpersonal Competence Questionnaire by
D. Buhrmester,W. Furman, M.T.Wittenberg and H.T. Reis—as adapted by Poland and Portugal. In
addition, the respondents expressed their views on OCL in the self-written questionnaire. According
to the research findings, the highest level of competence in the Portuguese group was achieved by
the respondents in terms of: Emotional Support (EW), Conflict Management and Resolution (RK)
and Negative Assertion—Asserting Influence (AO). In the Polish group, EW was the lowest. The
highest level of interpersonal competences was observed for Conflict Management and Resolution
(RK), Disclosure (US) and Initiation (IR). The largest group of the surveyed students in both countries
expressed a positive attitude towards implementing OCL in their courses of study and declared their
willingness to be a member of a group that learns online together
Characteristics of the natural radioactivity of the underground laboratories in the Baltic Sea Region participating in the BSUIN and EUL projects
Get PDFUnderground laboratories (ULs) offer more and
more opportunities for their usage. Still, one of the most
critical parameters describing ULs is their natural radioactivity.
Therefore, the article compares the six ULs of the
BSUIN (Baltic Sea Underground Innovation Network) and
EUL (Empowering Underground Laboratories Network Usage)
projects regarding their natural radioactivity. Measurements
include in situ and laboratory analysis of the collected
rock and water samples, using various nuclear spectrometry
techniques. The lowest level of natural radioactivity characterizes
salt deposit is in the Conceptual Lab development coordinated
by KGHM Cuprum R&D centre
Spin–orbit coupling in buckled monolayer nitrogene
Get PDFBuckled monolayer nitrogene has been recently predicted to be stable above the room temperature.
The low atomic number of nitrogen atom suggests, that spin–orbit coupling in nitrogene is weak,
similar to graphene or silicene. We employ first principles calculations and perform a systematic
study of the intrinsic and extrinsic spin–orbit coupling in this material. We calculate the spin mixing
parameter b
2 , reflecting the strength of the intrinsic spin–orbit coupling and find, that b
2 is relatively
small, on the order of 10
−6 . It also displays a weak anisotropy, opposite for electrons and holes. To
study extrinsic effects of spin–orbit coupling we apply a transverse electric field enabling spin–orbit
fields . We find, that are on the order of a single μ eV in the valence band, and tens to a hundred of
μ eV in the conduction band, depending on the applied electric field. Similar to b
2 , is also anisotropic,
in particular for the conduction electrons