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11.
Postcommunism as a Contradictory Combination of Competing Elements
Gal Kirn, 2015, recenzija, prikaz knjige, kritika

Ključne besede: postcommunist cinema, transition in Eastern films, postcommunism
Objavljeno v RUNG: 19.08.2020; Ogledov: 1973; Prenosov: 0
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12.
A critique of transition studies on postsocialism, or how to rethink and reorient 1989? : the case of (post)socialist (post)Yugoslavia
Gal Kirn, 2017, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Ključne besede: liberal democracy, market reform, transition study, socialism, democratic movement
Objavljeno v RUNG: 19.08.2020; Ogledov: 2229; Prenosov: 0
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13.
Beyond Neoliberalism : Social Analysis after 1989
Gal Kirn, Marian Burchardt, 2017, znanstvena monografija

Opis: This book explores how changes that occurred around 1989 shaped the study of the social sciences, and scrutinizes the impact of the paradigm of neoliberalism in different disciplinary fields. The contributors examine the ways in which capitalism has transmuted into a seemingly unquestionable, triumphant framework that globally articulates economics with epistemology and social ontology. The volume also investigates how new narratives of capitalism are being developed by social scientists in order to better understand capitalism’s ramifications in various domains of knowledge. At its heart, Beyond Neoliberalism seeks to unpack and disaggregate neoliberalism, and to take readers beyond the analytical limitations that a traditional framework of neoliberalism entails.
Ključne besede: neoliberalism, end of socialism, end of "end of history", transition discourse, end of welfare state, privatisation, deregulation
Objavljeno v RUNG: 19.08.2020; Ogledov: 2287; Prenosov: 0
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14.
15.
Coherent THz Emission Enhanced by Coherent Synchrotron Radiation Wakefield
Primož Rebernik Ribič, Giovanni De Ninno, 2018, izvirni znanstveni članek

Opis: We demonstrate that emission of coherent transition radiation by a ∼1 GeV energy-electron beam passing through an Al foil is enhanced in intensity and extended in frequency spectral range, by the energy correlation established along the beam by coherent synchrotron radiation wakefield, in the presence of a proper electron optics in the beam delivery system. Analytical and numerical models, based on experimental electron beam parameters collected at the FERMI free electron laser (FEL), predict transition radiation with two intensity peaks at ∼0.3 THz and ∼1.5 THz, and extending up to 8.5 THz with intensity above 20 dB w.r.t. the main peak. Up to 80-µJ pulse energy integrated over the full bandwidth is expected at the source, and in agreement with experimental pulse energy measurements. By virtue of its implementation in an FEL beam dump line, this work promises dissemination of user-oriented multi-THz beamlines parasitic and self-synchronized to EUV and x-ray FELs.
Ključne besede: terahertz radiation, free-electron lasers, coherent transition radiation
Objavljeno v RUNG: 12.01.2020; Ogledov: 2858; Prenosov: 0
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16.
On spin description of water-biopolymer interactions: theory and experiment of reentrant order-disorder transition.
Artem Badasyan, predavanje na tuji univerzi

Opis: The experimental studies of biopolymer conformations have reached an unprecedented level of detailization during the past decade and allow now to study single molecules in vivo [1]. Processing of experimental data essentially relies on theoretical approaches to conformational transitions in biopolymers [2]. However, the models that are currently used, originate from the early 1960's and contain several unjustified assumptions, widely accepted at that time. Thus, the view on the conformational transitions in the polypeptides as a two-state process has very limited applicability because the all-or-none transition mechanism takes place only in short polypeptides with sizes comparable to the spatial correlation length; the original formulation of Zimm-Bragg model is phenomenological and does not allow for a microscopic model for water; the implicit consideration of the water-polypeptide interactions through the ansatz about the quadratic dependence of free energy difference on temperature can only be justified through the assumption of an ideal gas with a constant heat capacity. To get rid of these deficiencies, we augment the Hamiltonian formulation [3] of the Zimm-Bragg model [4] with the term describing the water-polypeptide interactions [5]. The analytical solution of the model results in a formula, ready to be fit to Circular Dichroism (CD) data for both heat and cold denaturation. On the example of several sets of experimental data we show, that our formula results in a significantly better fit, as compared to the existing approaches. Moreover, the application of our procedure allows to compare the strengths of inter- and intra-molecular H-bonds, an information, inaccessible before.
Ključne besede: helix-coil transition, water-polypeptide interactions
Objavljeno v RUNG: 13.03.2019; Ogledov: 3113; Prenosov: 0
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17.
18.
New method to process Circular Dichroism experimental data on heat and cold denaturation of polypeptides in water
Artem Badasyan, Matjaž Valant, 2018, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: During the past decade the experimental studies of biopolymer conformations have reached an unprecedented level of detailization and allow to study single molecules in vivo [1]. Processing of experimental data essentially relies on theoretical approaches to conformational transitions in biopolymers [2]. However, the models that are currently used, originate from the early 1960's and contain several unjustified assumptions, widely accepted at that time. Thus, the view on the conformational transitions in the polypeptides as a two-state process has very limited applicability because the all-or-none transition mechanism takes place only in short polypeptides with sizes comparable to the spatial correlation length; the original formulation of Zimm-Bragg model is phenomenological and does not allow for a microscopic model for water; the implicit consideration of the water-polypeptide interactions through the ansatz about the quadratic dependence of free energy difference on temperature can only be justified through the assumption of an ideal gas with a constant heat capacity. To get rid of these deficiencies, we augment the Hamiltonian formulation [3] of the Zimm-Bragg model [4] with the term describing the water-polypeptide interactions [5]. The analytical solution of the model results in a formula, ready to be fit to Circular Dichroism (CD) data for both heat and cold denaturation. On the example of several sets of experimental data we show, that our formula results in a significantly better fit, as compared to the existing approaches. Moreover, the application of our procedure allows to compare the strengths of inter- and intra-molecular H-bonds, an information, inaccessible before. References [1] I. König, A. Zarrine-Afsar, M. Aznauryan, A. Soranno, B. Wunderlich, F. Dingfelder, J. C. Stüber, A. Plückthun, D. Nettels, B. Schuler, (2015), Single-molecule spectroscopy of protein conformational dynamics in live eukaryotic cells/Nature Methods, 12, 773-779. [2] J. Seelig, H.-J. Schönfeld, (2016), Thermal protein unfolding by differential scanning calorimetry and circular dichroism spectroscopy. Two-state model versus sequential unfolding/Quarterly Reviews of Biophysics, 49, e9, 1-24. [3] A.V. Badasyan, A. Giacometti, Y. Sh. Mamasakhlisov, V. F. Morozov, A. S. Benight, (2010), Microscopic formulation of the Zimm-Bragg model for the helix-coil transition/Physical Review E, 81, 021921. [4] B. H. Zimm, J. K. Bragg, (1959), Theory of the Phase Transition between Helix and Random Coil in Polypeptide Chains/Journal of Chemical Physics, 31, 526. [5] A. Badasyan, Sh.A. Tonoyan, A. Giacometti, R. Podgornik, V.A. Parsegian, Y.Sh. Mamasakhlisov, V.F. Morozov, (2014), Unified description of solvent effects in the helix-coil transition/Physical Review E, 89, 022723. Corresponding author: Artem Badasyan (artem.badasyan@ung.si)
Ključne besede: Biopolymers, Circular Dichroism, Zimm-Bragg model, helix-coil transition.
Objavljeno v RUNG: 22.10.2018; Ogledov: 3589; Prenosov: 0
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19.
CVD Growth of Molybdenum Diselenide Surface Structures with Tailored Morphology
M. Naeem Sial, Usman Muhammad, Binjie Zheng, Yanan Yu, Andraž Mavrič, Fangzhu Qing, Matjaž Valant, Zhiming M. Wang, 2018, izvirni znanstveni članek

Opis: Controllable atmospheric pressure CVD has been optimized to grow transition metal dichalcogenide MoSe2 with tunable morphology at 750 °C on a silicon substrate with a native oxide layer of 250 nm. Utilizing tetrapotassium perylene-3,4,9,10-tetracarboxylate (PTAS) as a seed promoter and varying the vertical distance between the substrate and the precursor MoO3, different morphologies of MoSe2 were achieved, including 2D triangles, hexagons, 3D pyramids and vertically aligned MoSe2 sheets. We find that the shape of MoSe2 is highly dependent upon the distance h between the substrate and the precursor. The change in the morphology is attributed to the confinement of vapor (MoO3 and Se) precursors and their concentrations due to the change in h. These results are helpful in improving our understanding about the factors which influence the morphology (shape evolution) and also the continuous growth of MoSe2 films.
Ključne besede: Transition metal dichalcogenides, 2D materials, Seed promotor, Chemical vapor deposition, Molybdenum diselenide
Objavljeno v RUNG: 20.08.2018; Ogledov: 3697; Prenosov: 14
.pdf Celotno besedilo (2,68 MB)

20.
Physics behind the Conformational Transitions in Biopolymers. Demystification of DNA melting and Protein Folding
Artem Badasyan, predavanje na tuji univerzi

Opis: Biophysics is the area of research, devoted to the studies of physical problems related to living systems. Animal cell is the smallest unit of an organism and mainly contains water solutions of structurally inhomogeneous polymers of biological origin: polypeptides (proteins) and polynucleotides (DNA, RNA). Statistical physics of macromolecules allows to describe the conformations of both synthetic and bio-polymers and constitutes the basis of Biophysics. During the talk I will report on the biophysical problems I have solved with numerical simulations (Langevin-based Molecular Dynamics of Go-like protein folding model and Monte Carlo with Wang-Landau sampling) and analytical studies of spin models (formula evaluation by hand, enforced with computer algebra systems). The direct connections with the theory of phase transitions, algebra of non-commutative operators and decorated spin models will be elucidated.
Ključne besede: Biophysics, protein folding, helix-coil transition, spin models
Objavljeno v RUNG: 13.12.2016; Ogledov: 5693; Prenosov: 0
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