cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Marked changes in electron transport through the blue copper protein azurin in the solid state upon deuteration
Creators: name: Amdursky, Nadav
name: Pecht, Israel
name: Sheves, Mordechai
name: Cahen, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Measuring electron transport (ETp) across proteins in the solid-state offers a way to study electron transfer (ET) mechanism(s) that minimizes solvation effects on the process. Solid state ETp is sensitive to any static (conformational) or dynamic (vibrational) changes in the protein. Our macroscopic measurement technique extends the use of ETp meas-urements down to low temperatures and the concomitant lower current densities, because the larger area still yields measurable currents. Thus, we reported previously a surprising lack of temperature-dependence for ETp via the blue copper protein azurin (Az), from 80K till denaturation, while ETp via apo-(Cu-free) Az was found to be temperature de-pendent \geq 200K. H/D substitution (deuteration) can provide a potentially powerful means to unravel factors that affect the ETp mechanism at a molecular level. Therefore, we measured and report here the kinetic deuterium isotope effect (KIE) on ETp through holo-Az as a function of temperature (30-340K). We find that deuteration has a striking effect in that it changes ETp from temperature independent to temperature dependent above 180K. This change is expressed in KIE values between 1.8 at 340K and 9.1 at \leq 180K. These values are particularly remarkable in light of the previously reported inverse KIE on the ET in Az in solution. The high values that we obtain for the KIE on the ETp process across the protein monolayer are consistent with a transport mechanism that involves through-(H-containing)-bonds of the β-sheet structure of Az, likely those of am-ide groups.
description: 15 pages, 3 figures, 2 Supplementary figures
Permeability of porous materials determined from the Euler characteristic
Creators: name: Scholz, Christian
name: Wirner, Frank
name: Götz, Jan
name: Rüde, Ulrich
name: Schröder-Turk, Gerd E.
name: Mecke, Klaus
name: Bechinger, Clemens
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the permeability of quasi two-dimensional porous structures of randomly placed overlapping monodisperse circular and elliptical grains. Measurements in microfluidic devices and lattice Boltzmann simulations demonstrate that the permeability is determined by the Euler characteristic of the conducting phase. We obtain an expression for the permeability that is independent of the percolation threshold and shows agreement with experimental and simulated data over a wide range of porosities. Our approach suggests that the permeability explicitly depends on the overlapping probability of grains rather than their shape.
Joachim Hahn, Das Geißenklösterle 1
Creators: name: Valoch, Karel
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Joachim Hahn, Das Geißenklösterle 1. Forschungen und Berichte zur Vor- und Frühgeschichte in Baden-Württemberg, Band 26. Konrad Theiss Verlag, Stuttgart 1988. 262 Seiten, 100 Textabbildungen, 45 Tafeln, 4 Beilagen.
description: Bonner Jahrbücher, Bd. 190.1990(1991): Bonner Jahrbücher
Low energy limit of QCD and the emerging of confinement
Creators: name: Frasca, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: After a derivation of low-energy limit of QCD, being this a non-local Nambu-Jona-Lasinio model, we are able to show that confinement emerges as a two-loop correction to the gluon propagator. One-gluon exchange is not enough as recently shown in literature about studies on the gluon propagator in the Landau gauge.
description: 4 pages, 3 figures. Contribution to the proceedings of conference QCD 12, Montpellier (France) 2-7 July 2012. Corrected eq. (7)
Impediments to diffusion in quantum graphs: geometry-based upper bounds on the spectral gap
Creators: name: Berkolaiko, Gregory
name: Kennedy, James B.
name: Kurasov, Pavel
name: Mugnolo, Delio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 34B45 (05C50 35P15 81Q35)

description: We derive several upper bounds on the spectral gap of the Laplacian with standard or Dirichlet vertex conditions on compact metric graphs. In particular, we obtain estimates based on the length of a shortest cycle (girth), diameter, total length of the graph, as well as further metric quantities introduced here for the first time, such as the avoidance diameter. Using known results about Ramanujan graphs, a class of expander graphs, we also prove that some of these metric quantities, or combinations thereof, do not to deliver any spectral bounds with the correct scaling.
description: 15+epsilon pages, 4 figures; with helpful corrections from an anonymous referee
Strokovna podpora Instituta Jožef Stefan prijavam na razpise Evropskega raziskovalnega sveta (ERC)
Creators: name: dr. Jordan, Romana
Publisher: name: Zenodo
Year: 2023

description: Predstavitev v okviru Srečanja projektnih konzorcijev izbranih na Javnem razpisu »Aktivnosti krepitve projektnih pisarn JRO« v okviru NOO z izmenjavo dobrih praks, ki ga je 13. 06. 2023 organizirala Univerza v Ljubljani.
Finding the Optimum
Creators: name: BS, Todd
Publisher: name: Zenodo
Year: 2023
Subjects: subject: Optimization
subject: Algorithm
subject: Statistics
subject: FOS: Mathematics

description: A robust non-parametric method is described for locating the optimum in a given list of values. The method entails first ranking the values. A linear function is then fitted to the values that maps rank to position in the list. The function is used to calculate the expected position of the value with maximum rank.
description: Anyone who is interested in the ideas published here and wishes to discuss them with me is most welcome to contact me at email address "illwind@hotmail.co.uk".
Microstructural Design via Spinodal-Mediated Phase Transformation Pathways in High-Entropy Alloys (HEAs) using Phase-Field Modelling
Creators: name: Kadirvel, Kamalnath
name: Fraser, Hamish L.
name: Wang, Yunzhi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Understanding the phase transformation pathways (PTPs) and microstructural evolution in multi-phase HEAs will aid alloy and process designs to tailor the microstructures for specific engineering applications. In this work, we study microstructural evolution in two-phase HEAs where a disordered parent phase separates into a mixture of two phases: an ordered phase ($β'$) + a disordered phase ($β$) upon cooling following two different PTPs: (i) congruent ordering followed by spinodal decomposition in the ordered phase and then disordering of one of the ordered phases, i.e., $β\rightarrow β' \rightarrow β_1' + β_2' \rightarrow β+ β_2'$ and (ii) spinodal decomposition in the disordered phase followed by ordering of one of the disordered phases, i.e., $β\rightarrow β_1 + β_2 \rightarrow β_1+β'$. We systematically investigate the effects of equilibrium volume fractions of individual phases, free energy landscapes (in particular, the location of the critical point of the miscibility gap relative to the compositions of the final two equilibrium phases), and elastic modulus mismatch between the two equilibrium phases on the microstructural evolution of these HEAs. We focus on the following morphological characteristics: bi-continuous microstructures vs. precipitates + matrix microstructures, ordered matrix + disordered precipitates vs. disordered matrix + ordered precipitates, and the discreteness of the precipitate phase. This parametric study may aid in multi-phase HEA design for desired microstructures.
description: Submitted to Acta Materialia
Angular distribution of low momentum atmospheric muons at ground level
Creators: name: Briki, Issa
name: Mazouz, Malek
name: Ghedira, Lotfi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report measurements of the angular distributions of low momentum atmospheric muons at 38 m above sea level for zenith angles $θ$ between -60 and 60 degrees in the south-north direction. The muon detection was performed with two NaI(Tl) scintillation detectors mounted in coincidence. An adjustable lead thickness placed between the detectors allowed to select muons with a minimal momentum ranging from 0.3 to 0.9 GeV$/$c. The integrated and the differential muon flux were determined by analyzing the deposited energy spectra in the scintillators backed up by a Geant4 simulation of the experimental setup. The results are consistent with the $\cos^{n}(θ)$ distribution in good agreement with the literature. These data contribute to fill the gap in the geomagnetic cutoff rigidity interval 8~GV$
Stefan Pülz, Untersuchungen zur kaiserzeitlichen Bauornamentik von Didyma
Creators: name: Köster, Reinhard
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Stefan Pülz, Untersuchungen zur kaiserzeitlichen Bauornamentik von Didyma. Istanbuler Mitteilungen, Beiheft 35. Verlag Ernst Wasmuth, Tübingen 1989. 196 Seiten, 36 Tafeln mit 216 Abbildungen
description: Bonner Jahrbücher, Bd. 192.1992(1993): Bonner Jahrbücher
Co-design focused, participatory approach to exploring a serious game with teachers of adult migrants with limited/interrupted formal education experience
Creators: name: Malessa, Eva
Publisher: name: Zenodo
Year: 2023
Subjects: LESLLA
adult migrant education
educational technology
TELL
MALL
serious games
language learning
literacy
usability
co-design

description: To produce empirical evidence, this study was initially designed as an efficacy study including field-testing of a research test version of a literacy support game app originally designed for Finnish first/second language children, with adult migrants. Experimental field-testing of with adult literacy learners was planned for 2020. Due to the disruptive effects of the COVID-19 pandemic, it was not possible to carry out the classroom-based testing. Realizing the potential of participatory design with teachers, I turned my research focus towards a participatory, re-design approach with in-service Finnish language and literacy teachers who tested, evaluated and re-designed a research version of the literacy support app 'Professori Pörröpää ja Lukukupla' developed by the AllRead research project team at the University of Jyväskylä.
Testing Helioseismic-Holography Inversions for Supergranular Flows Using Synthetic Data
Creators: name: Dombroski, D. E.
name: Birch, A. C.
name: Braun, D. C.
name: Hanasoge, S. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Supergranulation is one of the most visible length scales of solar convection and has been studied extensively by local helioseismology. We use synthetic data computed with the Seismic Propagation through Active Regions and Convection (SPARC) code to test regularized-least squares (RLS) inversions of helioseismic holography measurements for a supergranulation-like flow. The code simulates the acoustic wavefield by solving the linearized three-dimensional Euler equations in Cartesian geometry. We model a single supergranulation cell with a simple, axisymmetric, mass-conserving flow. The use of simulated data provides an opportunity for direct evaluation of the accuracy of measurement and inversion techniques. The RLS technique applied to helioseismic-holography measurements is generally successful in reproducing the structure of the horizontal flow field of the model supergranule cell. The errors are significant in horizontal-flow inversions near the top and bottom of the computational domain as well as in vertical-flow inversions throughout the domain. We show that the errors in the vertical velocity are due largely to cross talk from the horizontal velocity.
description: 22 pages, 12 figues, accepted for publication in Solar Physics
Additional file 4 of Integrated bioinformatic analysis identifies UBE2Q1 as a potential prognostic marker for high grade serous ovarian cancer
Creators: name: Topno, Rachel
name: Singh, Ibha
name: Kumar, Manoj
name: Agarwal, Pallavi
Publisher: name: figshare
Year: 2021
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Hematology

description: Additional file 4: Supplementary Fig. 1: (A & B) Kaplan Meier survival plots showing moderate to no correlation of high expression of B4GALT3 (Probe id = 210243_s_at) with relapse free survival probability of ovarian (A) and breast (B) cancer patients. (C & D) Co-expression correlation of UBE2Q1 with B4GALT3 in ovarian cancer (TCGA dataset) and basal-like breast cancer (BCGeneMiner-3 datasets) patient samples.
Strokovna podpora Kemijskega inštituta prijavam na razpise Evropskega raziskovalnega sveta (ERC)
Creators: name: dr. Tišler, Barbara
Publisher: name: Zenodo
Year: 2023

description: Predstavitev v okviru Srečanja projektnih konzorcijev izbranih na Javnem razpisu »Aktivnosti krepitve projektnih pisarn JRO« v okviru NOO z izmenjavo dobrih praks, ki ga je 13. 06. 2023 organizirala Univerza v Ljubljani.
Measurement as a shortcut to long-range entangled quantum matter
Creators: name: Lu, Tsung-Cheng
name: Lessa, Leonardo A.
name: Kim, Isaac H.
name: Hsieh, Timothy H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The preparation of long-range entangled states using unitary circuits is limited by Lieb-Robinson bounds, but circuits with projective measurements and feedback (``adaptive circuits'') can evade such restrictions. We introduce three classes of local adaptive circuits that enable low-depth preparation of long-range entangled quantum matter characterized by gapped topological orders and conformal field theories (CFTs). The three classes are inspired by distinct physical insights, including tensor-network constructions, multiscale entanglement renormalization ansatz (MERA), and parton constructions. A large class of topological orders, including chiral topological order, can be prepared in constant depth or time, and one-dimensional CFT states and non-abelian topological orders with both solvable and non-solvable groups can be prepared in depth scaling logarithmically with system size. We also build on a recently discovered correspondence between symmetry-protected topological phases and long-range entanglement to derive efficient protocols for preparing symmetry-enriched topological order and arbitrary CSS (Calderbank-Shor-Steane) codes. Our work illustrates the practical and conceptual versatility of measurement for state preparation.
description: 23 pages, 9 figures; updated to the published version
Die Redaktion stellt zur Diskussion: Siegburg
Creators: name: Tritschler, Thomas
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46, Nr. 2 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Thomas Bohn, Gräfin Mechthild von Sayn (1200/03-1285)
Creators: name: Friedhoff, Jens
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: Rezension zu: Thomas Bohn, Gräfin Mechthild von Sayn (1200/03-1285). Eine Studie zur rheinischen Kultur und Geschichte (Rheinisches Archiv 140) Köln/Weimar/Wien: Böhlau Verlag 2002, 721 Seiten, zahlr. Schwarzweiß- Abbildungen, kartoniert. ISBN 3-412-10901-0
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46, Nr. 2 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Doping Human Serum Albumin with Retinoate Markedly Enhances Electron Transport Across the Protein
Creators: name: Amdursky, Nadav
name: Pecht, Israel
name: Sheves, Mordechai
name: Cahen, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Electrons can migrate via proteins over distances that are considered long for non-conjugated systems. Proteins' nano-scale dimensions and the enormous flexibility of their structures and chemistry makes them fascinating subjects for investigating the mechanism of their electron transport (ETp) capacity. One particular attractive research direction is that of tuning their ETp efficiency by doping them with external small molecules. Here we report that solid-state ETp across human serum albumin (HSA) increases by more than two orders of magnitude upon retinoate (RA) binding to HSA. RA was chosen because optical spectroscopy has provided evidence for the non-covalent binding of at least three RA molecules to HSA and indications for their relative structural positions. The temperature dependence of ETp shows that both the activation energy and the distance-decay constant decrease with increasing RA binding to HSA. Furthermore, the observed transition from temperature-activated ETp above 190K to temperature-independent ETp below this temperature suggests a change in the ETp mechanism with temperature.
description: 7 pages, 3 figures 5 Supplementary figures
Kein Glaubenskrieg über Hauskapellen – Sondern: Auf welcher Grundlage kann eine Typologie basieren?
Creators: name: Hoernes, Martin
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46, Nr. 3 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Spike Timing Dependent Competitive Learning in Recurrent Self Organizing Pulsed Neural Networks Case Study: Phoneme and Word Recognition
Creators: name: Behi, Tarek
name: Arous, Najet
name: Ellouze, Noureddine
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Synaptic plasticity seems to be a capital aspect of the dynamics of neural networks. It is about the physiological modifications of the synapse, which have like consequence a variation of the value of the synaptic weight. The information encoding is based on the precise timing of single spike events that is based on the relative timing of the pre- and post-synaptic spikes, local synapse competitions within a single neuron and global competition via lateral connections. In order to classify temporal sequences, we present in this paper how to use a local hebbian learning, spike-timing dependent plasticity for unsupervised competitive learning, preserving self-organizing maps of spiking neurons. In fact we present three variants of self-organizing maps (SOM) with spike-timing dependent Hebbian learning rule, the Leaky Integrators Neurons (LIN), the Spiking_SOM and the recurrent Spiking_SOM (RSSOM) models. The case study of the proposed SOM variants is phoneme classification and word recognition in continuous speech and speaker independent.
description: 10 pages, 15 tables
Full randomness from arbitrarily deterministic events
Creators: name: Gallego, Rodrigo
name: Masanes, Lluis
name: de la Torre, Gonzalo
name: Dhara, Chirag
name: Aolita, Leandro
name: Acin, Antonio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Do completely unpredictable events exist in nature? Classical theory, being fully deterministic, completely excludes fundamental randomness. On the contrary, quantum theory allows for randomness within its axiomatic structure. Yet, the fact that a theory makes prediction only in probabilistic terms does not imply the existence of any form of randomness in nature. The question then remains whether one can certify randomness independent of the physical framework used. While standard Bell tests approach this question from this perspective, they require prior perfect randomness, which renders the approach circular. Recently, it has been shown that it is possible to certify full randomness using almost perfect random bits. Here, we prove that full randomness can indeed be certified using quantum non-locality under the minimal possible assumptions: the existence of a source of arbitrarily weak (but non-zero) randomness and the impossibility of instantaneous signalling. Thus we are left with a strict dichotomic choice: either our world is fully deterministic or there exist in nature events that are fully random. Apart from the foundational implications, our results represent a quantum protocol for full randomness amplification, an information task known to be impossible classically. Finally, they open a new path for device-independent protocols under minimal assumptions.
description: 4 pages, 2 figures + appendices
Spin Susceptibility of a J=3/2 Superconductor
Creators: name: Kim, Dakyeong
name: Sato, Takumi
name: Kobayashi, Shingo
name: Asano, Yasuhiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss the spin susceptibility of superconductors in which a Cooper pair consists of two electrons having the angular momentum J=3/2 due to strong spin-orbit interactions. The susceptibility is calculated analytically for pseudospin quintet states in a cubic superconductor within the linear response to a Zeeman field. The susceptibility for $A_{1g}$ symmetry states is isotropic in real space. For $E_g$ and $T_{2g}$ symmetry cases, the results depend sensitively on choices of order parameter. The susceptibility is isotropic for a $T_{2g}$ symmetry state, whereas it becomes anisotropic for an $E_{g} $ symmetry state. We also find in a $T_{2g}$ state that the susceptibility tensor has off-diagonal elements.
description: 11 pages, 3 figures
The Extended Hubble Space Telescope Supernova Survey: The Rate of Core Collapse Supernovae to z~1
Creators: name: Dahlen, Tomas
name: Strolger, Louis-Gregory
name: Riess, Adam G.
name: Mattila, Seppo
name: Kankare, Erkki
name: Mobasher, Bahram
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use a sample of 45 core collapse supernovae detected with the Advanced Camera for Surveys on-board the Hubble Space Telescope to derive the core collapse supernova rate in the redshift range 0.1=0.39, =0.73, and =1.11, we find rates 3.00 {+1.28}{-0.94}{+1.04}{-0.57}, 7.39 {+1.86}{-1.52}{+3.20}{-1.60}, and 9.57 {+3.76}{-2.80}{+4.96}{-2.80}, respectively, given in units yr^{-1} Mpc^{-3} 10^{-4} h_{70}^3. The rates have been corrected for host galaxy extinction, including supernovae missed in highly dust enshrouded environments in infrared bright galaxies. The first errors represent statistical while the second are the estimated systematic errors. We perform a detailed discussion of possible sources of systematic errors and note that these start to dominate over statistical errors at z>0.5, emphasizing the need to better control the systematic effects. For example, a better understanding of the amount of dust extinction in the host galaxies and knowledge of the supernova luminosity function, in particular the fraction of faint M > -15 supernovae, is needed to better constrain the rates. When comparing our results with the core collapse supernova rate based on the star formation rate, we find a good agreement, consistent with the supernova rate following the star formation rate, as expected.
description: 12 pages, 4 figures, ApJ, replaced to match version in press
Electronic structure and magnetic and optical properties of double perovskite Bi2FeCrO6 from first-principles investigation
Creators: name: Song, Zhe-Wen
name: Liu, Bang-Gui
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Double perovskite Bi$_2$FeCrO$_6$, related with BiFeO$_3$, is very interesting because strong ferroelectricity and high magnetic Curie temperature beyond room temperature are observed in it. However, existing density-functional-theory (DFT) studies, using pseudo-potentials, produce metallic ground state under the local density approximation (LDA) and need LDA+U method to yield needed nonmetallic ground state, resulting in low magnetic Curie temperature (below 130 K). Here, we optimize its crystal structure and then investigate its electronic structure and magnetic and optical properties by combining the full-potential augmented plane wave method with Monte Carlo simulation. Our optimized structure is a robust ferrimagnetic semiconductor. This nonmetallic phase is formed due to crystal field splitting and spin exchange splitting, in contrast to Mott-Hubbard states in previous DFT studies. Spin exchange constants and optical properties are calculated. Our ab initio magnetic Curie temperature is 450 K, much higher than previous DFT-based value and consistent with experimental results. Our study and analysis reveals that the main magnetic mechanism is an antiferromagnetic superexchange between Fe and Cr over the intermediate O atom. These results are useful to understanding such perovskite materials and exploring their potential applications.
description: 6 pages, 8 figures
Strong electronic correlations from Hund's coupling
Creators: name: Georges, Antoine
name: Medici, Luca de'
name: Mravlje, Jernej
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Strong electronic correlations are often associated with the proximity of a Mott insulating state. In recent years however, it has become increasingly clear that the Hund's rule coupling (intra-atomic exchange) is responsible for strong correlations in multi-orbital metallic materials which are not close to a Mott insulator. Hund's coupling has two effects: it influences the energetics of the Mott gap and strongly suppresses the coherence scale for the formation of a Fermi-liquid. A global picture has emerged recently, which emphasizes the importance of the average occupancy of the shell as a control parameter. The most dramatic effects occur away from half-filling or single occupancy. The theoretical understanding and physical properties of these `Hund's metals' are reviewed, together with the relevance of this concept to transition-metal oxides of the 3d, and especially 4d series (such as ruthenates), as well as to the iron-based superconductors (iron pnictides and chalcogenides).
description: Submitted to Annual Reviews in Condensed Matter Physics
XMM-Newton view of the N 206 superbubble in the Large Magellanic Cloud
Creators: name: Kavanagh, Patrick J.
name: Sasaki, Manami
name: Points, Sean. D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform an analysis of the X-ray superbubble in the N 206 HII region in the Large Magellanic Cloud using current generation facilities to gain a better understanding of the physical processes at work in the superbubble and to improve our knowledge of superbubble evolution. We used XMM-Newton observations of the N 206 region to produce images and extract spectra of the superbubble diffuse emission. Morphological comparisons with Halpha images from the Magellanic Cloud Emission Line Survey were performed, and spectral analysis of the diffuse X-ray emission was carried out. We derived the physical properties of the hot gas in the superbubble based on the results of the spectral analysis. We also determined the total energy stored in the superbubble and compared this to the expected energy input from the stellar population to assess the superbubble growth rate discrepancy for N 206. We find that the brightest region of diffuse X-ray emission is confined by a Halpha shell, consistent with the superbubble model. In addition, faint emission extending beyond the Halpha shell was found, which we attribute to a blowout region. The spectral analysis of both emission regions points to a hot shocked gas as the likely origin of the emission. We determine the total energy stored in the bubble and the expected energy input by the stellar population. However, due to limited data on the stellar population, the input energy is poorly constrained and, consequently, no definitive indication of a growth rate discrepancy is seen. Using the high-sensitivity X-ray data from XMM-Newton and optical data from the Magellanic Cloud Emission Line Survey has allowed us to better understand the physical properties of the N 206 superbubble and address some key questions of superbubble evolution.
description: 12 pages, 7 figures. Accepted for publication in A&A
Jet probes of QCD matter: single jets and dijets in heavy-ion collisions
Creators: name: Zhang, Ben-Wei
name: He, Yuncun
name: Wang, Enke
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Modifications of jets in the existence of a hot and dense QCD medium have recently attracted a lot of attentions. In this talk, we demonstrate how jet-medium interactions change the behavior of jets by offering examples of inclusive jet and dijet productions at $ {\cal O}(α_s^3)$ in heavy ion collisions including initial-state cold nuclear effects and especially the final-state parton energy loss effect. The suppression of inclusive jet spectrum varying with jet radii and a flatter dijet momentum imbalance as compared to those in hadron-hadron collisions are observed in high-energy nuclear collisions.
description: Talk at Quark Matter 2012. Small typos corrected. 4 pages, 3 figures
Entgegnung auf die Besprechung von Alexander Thon zu dem Tagungsband der 3. Landauer Staufertagung in: „Burgen und Schlösser“ 3/ 2005
Creators: name: Krüger, Jürgen
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46, Nr. 4 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
A comparative study of different machine learning methods for dissipative quantum dynamics
Creators: name: Rodriguez, Luis E. Herrera
name: Ullah, Arif
name: Espinosa, Kennet J. Rueda
name: Dral, Pavlo O.
name: Kananenka, Alexei A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: It has been recently shown that supervised machine learning (ML) algorithms can accurately and efficiently predict the long-time populations dynamics of dissipative quantum systems given only short-time population dynamics. In the present article we benchmaked 22 ML models on their ability to predict long-time dynamics of a two-level quantum system linearly coupled to harmonic bath. The models include uni- and bidirectional recurrent, convolutional, and fully-connected feed-forward artificial neural networks (ANNs) and kernel ridge regression (KRR) with linear and most commonly used nonlinear kernels. Our results suggest that KRR with nonlinear kernels can serve as inexpensive yet accurate way to simulate long-time dynamics in cases where the constant length of input trajectories is appropriate. Convolutional Gated Recurrent Unit model is found to be the most efficient ANN model.
description: 22 pages, 6 figures
Burgen und Basare – Mittelalterliche Lebensformen des Vorderen Orients
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46, Nr. 4 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Ladder operators and squeezed coherent states of a 3-dimensional generalized isotonic nonlinear oscillator
Creators: name: Ruby, V. Chithiika
name: Karthiga, S.
name: Senthilvelan, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We explore squeezed coherent states of a 3-dimensional generalized isotonic oscillator whose radial part is the newly introduced generalized isotonic oscillator whose bound state solutions have been shown to admit the recently discovered $X_1$-Laguerre polynomials. We construct a complete set of squeezed coherent states of this oscillator by exploring the squeezed coherent states of the radial part and combining the latter with the squeezed coherent states of the angular part. We also prove that the three mode squeezed coherent states resolve the identity operator. We evaluate Mandel's $Q$-parameter of the obtained states and demonstrate that these states exhibit sub-Possionian and super-Possionian photon statistics. Further, we illustrate the squeezing properties of these states, both in the radial and angular parts, by choosing appropriate observables in the respective parts. We also evaluate Wigner function of these three mode squeezed coherent states and demonstrate squeezing property explicitly.
description: To appear in J. Phys. A: Math. Theor., (2012)
Energy extraction from extremal charged black holes due to the BSW effect
Creators: name: Zaslavskii, O. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Two particles can collide in the vicinity of a rotating black hole producing the divergent energy in the centre of mass frame (the BSW effect). However, it was shown recently that an observer at infinity can register quite modest energies E and masses m which obey some upper bounds. In the present work the counterpart of the original BSW effect is considered that may occur even for radial motion of colliding particles near charged static black holes. It is shown that in some scenarios there are no upper bound on E and m . Thus the high-energetic and superheavy products of the BSW effect in this situation are, in principle, detectable at infinity.
description: 7 pages
Neutrinoless $ββ$-decay nuclear matrix elements from two-neutrino $ββ$-decay data
Creators: name: Jokiniemi, Lotta
name: Romeo, Beatriz
name: Soriano, Pablo
name: Menéndez, Javier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We study two-neutrino ($2νββ$) and neutrinoless double-$β$ ($0νββ$) decays in the nuclear shell model and proton-neutron quasiparticle random-phase approximation (pnQRPA) frameworks. Calculating the decay half-life of several dozens of nuclei ranging from calcium to xenon with the shell model, and of $ββ$ emitters with a wide range of proton-neutron pairing strengths in the pnQRPA, we observe good linear correlations between $2νββ$- and $0νββ$-decay nuclear matrix elements for both methods. We then combine the correlations with measured $2νββ$-decay half-lives to predict $0νββ$-decay matrix elements with theoretical uncertainties based on our systematic calculations. Our results include two-body currents and the short-range $0νββ$-decay operator.
description: 12 pages, 8 figures, 4 tables; corresponds to the published version
Bayerns Krone 1806
Creators: name: Oelwein, Cornelia
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 47, Nr. 1 (2006): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Do Millennials prefer urban living? : evidence from census migration flows in U.S. megaregions and the State of Texas
Creators: name: Su, Ziyue
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Migration flow
Millennials
United States
Texas
Urban

description: This report presents a spatial study of Millennials’ migration flow, looking for Millennials’ living preference within the thirteen megaregions in the United States. It also studies the migration flow in the State of Texas and focuses on the Texas Triangle megaregion. The report studies the internal migration flows in each U.S. megaregion and within the Texas State. The migration of cross-state or cross-nation is not considered here. The analysis utilizes accessible ACS 2011-2015 County-to-County Migration Flow dataset to reveal Millennials’ living preference, or their migration patterns, within thirteen megaregions in the United States and the Texas State.
Das „Haus Custodis“ auf der Isenburg bei Hattingen (Nordrhein-Westfalen)
Creators: name: Custodis, Paul-Georg
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 47, Nr. 2 (2006): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Asymmetric rotations and dimerization driven by normal to modulated phase transition in 4-biphenylcarboxy coupled L-phenylalaninate
Creators: name: Dey, Somnath
name: Sasmal, Supriya
name: Mondal, Saikat
name: Kumar, Santosh
name: Chowdhury, Rituparno
name: Sarkar, Debashrita
name: Reddy, C. Malla
name: Peters, Lars
name: Roth, Georg
name: Haldar, Debasish
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Amongst the derivatives of 4-biphenylcarboxylic acid and amino acid esters, the crystal structure of 4-biphenylcarboxy-(L)-phenylalaninate is unusual owing to its monoclinic symmetry within a pseudo-orthorhombic lattice. The distortion is described by disparate rotational property around the chiral centers ($φ_{\mathrm{chiral}}$ $\simeq$ -129 degrees and 58 degrees) of the two molecules in the asymmetric unit. Each of these molecules comprise of planar biphenyl moieties ($φ_{\mathrm{biphenyl}}$ = 0 degrees). Using temperature dependent single crystal X-ray diffraction experiments we show that the compound undergoes a phase transition below $T$ $\sim$ 124 K that is characterized by a commensurate modulation wave vector, $\mathbf{q}$ = $δ(101)$, $δ$ = $\frac{1}{2}$. The (3+1) dimensional modulated structure at $T$ = 100 K suggests that the phase transition drives the biphenyl moieties towards non coplanar conformations with significant variation of internal torsion ($φ^{\mathrm{max}}_{\mathrm{biphenyl}}$ $\leq$ $20$ degrees). These intramolecular rotations lead to dimerization of the molecular stacks that are described predominantly by intermolecular tilts and small variations in intermolecular distances. Atypical of modulated structures and superstructures of biphenyl and other polyphenyls, the rotations of individual molecules are asymmetric ($Δ$$φ_{\mathrm{biphenyl}}$ $\approx$ 5 degrees) while $φ_{\mathrm{biphenyl}}$ of one independent molecule is two to four times larger than the other. Crystal-chemical analysis and phase relations in superspace suggest multiple competing factors involving intramolecular steric factors, intermolecular H--C${\cdot}{\cdot}{\cdot}$C--H contacts and weak C--H${\cdot}{\cdot}{\cdot}$O hydrogen bonds that govern the distinctively unequal torsional property of the molecules.
Predstavitev konzorcija in projektnih aktivnosti projekta SKUPP
Creators: name: dr. Kuhar, Antoaneta
Publisher: name: Zenodo
Year: 2023

description: Predstavitev v okviru Srečanja projektnih konzorcijev izbranih na Javnem razpisu »Aktivnosti krepitve projektnih pisarn JRO« v okviru NOO z izmenjavo dobrih praks, ki ga je 13. 06. 2023 organizirala Univerza v Ljubljani.
Suzanne Bäumler, Evamaria Brockhoff und Michael Henker (Hrsg.), Von Kaisers Gnaden. 500 Jahre Pfalz-Neuburg
Creators: name: Laß, Heiko
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2019

description: Rezension zu: Suzanne Bäumler, Evamaria Brockhoff und Michael Henker (Hrsg.), Von Kaisers Gnaden. 500 Jahre Pfalz-Neuburg. Katalog zur Bayerischen Landesausstellung 2005. Neuburg an der Donau, 3. Juni bis 16. Oktober 2005 (Veröffentlichungen zur Bayerischen Geschichte und Kultur 50/2005). Augsburg 2005. 400 Seiten, Softcover, Abbildungen durchgehend farbig, ISBN 3-937974-01-6. Buchhandelsausgabe Hardcover, Regensburg 2004, ISBN 3-7917-1966-1
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 47, Nr. 2 (2006): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Streaming complexity of CSPs with randomly ordered constraints
Creators: name: Saxena, Raghuvansh R.
name: Singer, Noah
name: Sudan, Madhu
name: Velusamy, Santhoshini
Publisher: name: arXiv
Year: 2022
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: We initiate a study of the streaming complexity of constraint satisfaction problems (CSPs) when the constraints arrive in a random order. We show that there exists a CSP, namely $\textsf{Max-DICUT}$, for which random ordering makes a provable difference. Whereas a $4/9 \approx 0.445$ approximation of $\textsf{DICUT}$ requires $Ω(\sqrt{n})$ space with adversarial ordering, we show that with random ordering of constraints there exists a $0.48$-approximation algorithm that only needs $O(\log n)$ space. We also give new algorithms for $\textsf{Max-DICUT}$ in variants of the adversarial ordering setting. Specifically, we give a two-pass $O(\log n)$ space $0.48$-approximation algorithm for general graphs and a single-pass $\tilde{O}(\sqrt{n})$ space $0.48$-approximation algorithm for bounded degree graphs. On the negative side, we prove that CSPs where the satisfying assignments of the constraints support a one-wise independent distribution require $Ω(\sqrt{n})$-space for any non-trivial approximation, even when the constraints are randomly ordered. This was previously known only for adversarially ordered constraints. Extending the results to randomly ordered constraints requires switching the hard instances from a union of random matchings to simple Erdös-Renyi random (hyper)graphs and extending tools that can perform Fourier analysis on such instances. The only CSP to have been considered previously with random ordering is $\textsf{Max-CUT}$ where the ordering is not known to change the approximability. Specifically it is known to be as hard to approximate with random ordering as with adversarial ordering, for $o(\sqrt{n})$ space algorithms. Our results show a richer variety of possibilities and motivate further study of CSPs with randomly ordered constraints.
The negative side of cohomology for Calabi-Yau categories
Creators: name: Bergh, Petter Andreas
name: Jorgensen, David A.
name: Oppermann, Steffen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: Commutative Algebra (math.AC)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 13H10, 16E40, 16W50

description: We study integer-graded cohomology rings defined over Calabi-Yau categories. We show that the cohomology in negative degree is a trivial extension of the cohomology ring in non-negative degree, provided the latter admits a regular sequence of central elements of length two. In particular, the product of elements of negative degrees are zero. As corollaries we apply this to Tate-Hochschild cohomology rings of symmetric algebras, and to Tate cohomology rings over group algebras. We also prove similar results for Tate cohomology rings over commutative local Gorenstein rings.
description: 14 pages
Experimental Examination of Entanglement Estimates
Creators: name: Xie, Songbo
name: Zhao, Yuan-Yuan
name: Zhang, Chao
name: Huang, Yun-Feng
name: Li, Chuan-Feng
name: Guo, Guang-Can
name: Eberly, Joseph H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently a proper genuine multipartite entanglement (GME) measure has been found for three-qubit pure states [see Xie and Eberly, Phys. Rev. Lett. 127, 040403 (2021)], but capturing useful entanglement measures for mixed states has remained an open challenge. So far, it requires not only a full tomography in experiments, but also huge calculational labor. A leading proposal was made by Gühne, Reimpell, and Werner [Phys. Rev. Lett. 98, 110502 (2007)], who used expectation values of entanglement witnesses to describe a lower bound estimation of entanglement. We provide here an extension that also gives genuine upper bounds of entanglement. This advance requires only the expectation value of {\em any} Hermitian operator. Moreover, we identify a class of operators $\A_1$ which not only give good estimates, but also require a remarkably small number of experimental measurements. In this note we define our approach and illustrate it by estimating entanglement measures for a number of pure and mixed states prepared in our recent experiments.
description: 5 pages, 4 figures
Additional file 5 of Integrated bioinformatic analysis identifies UBE2Q1 as a potential prognostic marker for high grade serous ovarian cancer
Creators: name: Topno, Rachel
name: Singh, Ibha
name: Kumar, Manoj
name: Agarwal, Pallavi
Publisher: name: figshare
Year: 2021
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Hematology

description: Additional file 5: Supplementary Fig. 2: (A) Structure of UBE2Q1 depicting UBC catalytic domain at the C terminus and a site of protein modification (red dot) (HPRD ID: 15601) (B & C) 3D structure of UBE2Q1 showing 5 alpha helices and 6 beta strands (PDB ID 2QGX).