cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Parton distribution function dependence of benchmark Standard Model total cross sections at the 7 TeV LHC
Creators: name: Watt, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We compare predictions for the W, Z, gg->H and t-tbar total cross sections at the Large Hadron Collider (LHC), for a centre-of-mass energy of 7 TeV, using the most recent publicly available next-to-leading order and next-to-next-to-leading order parton distribution functions (PDFs) from all PDF fitting groups. In particular, we focus on the dependence on the different values of the strong coupling, alpha_S(M_Z^2), used by each group. We also perform a comparison of the relevant quark-antiquark and gluon-gluon luminosity functions. We make some comments on the recent PDF4LHC recommendations. Finally, we discuss the comparison of data and theory for W and Z cross sections at the LHC.
description: 40 pages, 18 figures. v2: version published in JHEP
Interactions of MeV and GeV sterile neutrinos with matter
Creators: name: Alavi, S. A.
name: Ebrahimi, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Both cosmology and astrophysics suggest the possible existence of sterile neutrino which is a dark matter candidate. The interaction of sterile neutrinos with matter in keV energy scale has been studied in the literature. In this paper we study the interaction of sterile neutrinos with atoms and their role on ionization of atoms in MeV and GeV energy scale. We also study the interaction of sterile neutrinos with nuclei in the MeV and GeV energy scale. We obtain the relevant cross sections for both these two interactions. Finally we compare our results with the results of keV energy range.
description: 7 pages, 1 figure
Complex Networks and Symmetry I: A Review
Creators: name: Garlaschelli, Diego
name: Ruzzenenti, Franco
name: Basosi, Riccardo
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Finance (q-fin.GN)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: In this review we establish various connections between complex networks and symmetry. While special types of symmetries (e.g., automorphisms) are studied in detail within discrete mathematics for particular classes of deterministic graphs, the analysis of more general symmetries in real complex networks is far less developed. We argue that real networks, as any entity characterized by imperfections or errors, necessarily require a stochastic notion of invariance. We therefore propose a definition of stochastic symmetry based on graph ensembles and use it to review the main results of network theory from an unusual perspective. The results discussed here and in a companion paper show that stochastic symmetry highlights the most informative topological properties of real networks, even in noisy situations unaccessible to exact techniques.
description: Final accepted version
Es hätte schon vorgestern passieren sollen. Aber wer muss etwas machen? Etablierung von institutionalisierter Angehörigenarbeit im schweizerischen Justizvollzug
Creators: name: Brügger, Pascale
Publisher: name: Zenodo
Year: 2021

description: Auf Grundlage wissenschaftlicher Erkenntnisse, dass Angehörige inhaftierter Personen bei einer Inhaftierung finanziellen, psychischen und sozialen Belastungen ausgesetzt sind, die mit geeigneten intra- und extramuralen Massnahmen reduziert werden können, erörtert die vorliegende Master-Thesis die Forschungsfrage: Was ermöglicht die Etablierung und Umsetzung von institutionalisierter intra- und extramuraler Angehörigenarbeit im Justizvollzug der Schweiz? Die Forschungsfrage wurde ausgehend von Axel Groenemeyers Theorie der Institutionalisierung sozialer Probleme und anhand von Expert*innen- Interviews untersucht. Die Sichtweisen auf Angehörige und auf Angehörigenarbeit wurden aus wissenschaftlicher, vollzugspraktischer, rechtlicher, medialer und politischer Perspektive sowie aus Sicht der Expert*innen analysiert. Dabei liessen sich fünf verschiedene Deutungsmuster bezüglich Angehörigen und Angehörigenarbeit feststellen: (1) Angehörige sind (unschuldige) Personen in Not mit Unterstützungsbedarf, (2) Angehörige sind Personen, die eine wichtige Ressource im Resozialisierungsprozess darstellen, (3) Angehörige sind Kinder, die einen besonderen Schutzbedarf und eigene Rechte haben, (4) Angehörige sind (unschuldige) Personen in Not mit Unterstützungsbedarf, die eine wichtige Ressource im Resozialisierungsprozess darstellen können und (5) Angehörige sind Personen, die geschützt werden müssen. Anhand einer Stärken-Schwächen-Analyse zeigte sich, dass sich das dritte und das vierte Deutungsmuster besonders eignen, um die Institutionalisierung der Angehörigenarbeit im Justizvollzug zu ermöglichen. Empfehlungen auf nationaler, kantonaler und konkordatlicher Ebene, Lobbying, Sensibilisierung von Fachpersonen, das Anregen und Lancieren von Pilotprojekten sowie Grundlagenforschung durch das SKJV wurden als zentrale Massnahmen ermittelt, die die Etablierung und Umsetzung von institutionalisierter Angehörigenarbeit im Justizvollzug ermöglichen. Einmal etabliert wird sich in einem nächsten Schritt die Frage nach der Wirksamkeit von intra- und extramuraler Angehörigenarbeit stellen.
description: + Code Diss LU: hslusa masa + Fussnote: Master of Science in Sozialer Arbeit, Bern, Luzern, St. Gallen, 2021 + NL-Code: NLLUHSA202109
Eigenvectors of open XXZ and ASEP models for a class of non-diagonal boundary conditions
Creators: name: Crampé, Nicolas
name: Ragoucy, Eric
name: Simon, Damien
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a generalization of the coordinate Bethe ansatz that allows us to solve integrable open XXZ and ASEP models with non-diagonal boundary matrices, provided their parameters obey some relations. These relations extend the ones already known in the literature in the context of algebraic or functional Bethe ansatz. The eigenvectors are represented as sums over cosets of the $BC_n$ Weyl group.
description: typos corrected, references updated, accepted in J. Stat. Mech
Mapping the energy surface of PbTiO3 in multidimensional electric-displacement space
Creators: name: Hong, Jiawang
name: Vanderbilt, David
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In recent years, methods have been developed that allow first-principles electronic-structure calculations to be carried out under conditions of fixed electric field. For some purposes, however, it is more convenient to work at fixed electric displacement field. Initial implementations of the fixed-displacement-field approach have been limited to constraining the field along one spatial dimension only. Here, we generalize this approach to treat the full three-dimensional displacement field as a constraint, and compute the internal-energy landscape as a function of this multidimensional displacement-field vector. Using PbTiO3 as a prototypical system, we identify stable or metastable tetragonal, orthorhombic and rhombohedral structures as the displacement field evolves along [001], [110] and [111] directions, respectively. The energy minimum along [001] is found to be deeper than that along [110] or [111], as expected for a system having a tetragonal ground state. The barriers connecting these minima are found to be quite small, consistent with the current understanding that the large piezoelectric effects in PbTiO3 arise from the easy rotation of the polarization vector.
description: 6 pages, 6 figures
Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures
Creators: name: Kuhl, U.
name: Barkhofen, S.
name: Tudorovskiy, T.
name: Stoeckmann, H. -J.
name: Hossain, T.
name: de Parny, L. de Forges
name: Mortessagne, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a microwave realization of finite tight-binding graphene-like structures. The structures are realized using discs with a high index of refraction. The discs are placed on a metallic surface while a second surface is adjusted atop the discs, such that the waves coupling the discs in the air are evanescent, leading to the tight-binding behavior. In reflection measurements the Dirac point and a linear increase close to the Dirac point is observed, if the measurement is performed inside the sample. Resonances due to edge states are found close to the Dirac point if the measurements are performed at the zigzag-edge or at the corner in case of a broken benzene ring.
description: 4 pages, 6 figures
Synchronizing distant nodes: a universal classification of networks
Creators: name: Flunkert, V.
name: Yanchuk, S.
name: Dahms, T.
name: Schoell, E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Stability of synchronization in delay-coupled networks of identical units generally depends in a complicated way on the coupling topology. We show that for large coupling delays synchronizability relates in a simple way to the spectral properties of the network topology. The master stability function used to determine stability of synchronous solutions has a universal structure in the limit of large delay: it is rotationally symmetric around the origin and increases monotonically with the radius in the complex plane. This allows a universal classification of networks with respect to their synchronization properties and solves the problem of complete synchronization in networks with strongly delayed coupling.
description: 4 pages, 1 figure, 1 table. Phys. Rev. Lett. in print, v2 has minor changes in response to PRL referee comments
Large Short-Baseline antinu_mu Disappearance
Creators: name: Giunti, Carlo
name: Laveder, Marco
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze the LSND, KARMEN and MiniBooNE data on short-baseline antinu_mu -> antinu_e oscillations and the data on short-baseline antinu_e disappearance obtained in the Bugey-3 and CHOOZ reactor experiments in the framework of 3+1 antineutrino mixing, taking into account the MINOS observation of long-baseline antinu_mu disappearance and the KamLAND observation of very-long-baseline antinu_e disappearance. We show that the fit of the data implies that the short-baseline disappearance of antinu_mu is relatively large. We obtain a prediction of an effective amplitude sin^2 2 theta_{mu mu} >~ 0.1 for short-baseline antinu_mu disappearance generated by 0.2
description: 6 pages; final version published in Phys.Rev.D 83 (2011) 053006
The galactic spin of AGN galaxies
Creators: name: Cervantes-Sodi, Bernardo
name: Hernandez, X.
name: Park, Changbom
name: Choi, Yun-Young
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using an extensive sample of galaxies selected from the Sloan Digital Sky Survey Data Release 5, we compare the angular momentum distribution of active galactic nucleus (AGN) with non-AGN hosting late-type galaxies. To this end we characterize galactic spin through the dimensionless angular momentum parameter $λ$, which we estimate approximately through simple dynamical considerations. Using a volume limited sample, we find a considerable difference when comparing the empirical distributions of $λ$ for AGNs and non-AGN galaxies, the AGNs showing typically low $λ$ values and associated dispersions, while non-AGNs present higher $λ$ values and a broader distribution. A more striking difference is found when looking at $λ$ distributions in thin $M_{r}$ cuts, while the spin of non-AGN galaxies presents an anti-correlation with $M_{r}$, with bright (massive) galaxies having low spins, AGN host galaxies present uniform values of $λ$ at all magnitudes, a behavior probably imposed by the fact that most late-type AGN galaxies present a narrow range in color, with a typical constant $λ$ value. We also find that the fraction of AGN hosting galaxies in our sample strongly depends on galactic spin, increasing dramatically for decreasing $λ$. For AGN host galaxies we compute the mass of their supermassive black holes and find that this value tends to be higher for low spin galaxies, even at fixed luminosity, a result that could account, to a certain extent, for the spread on the luminosity black-hole mass relation.
description: 6 pages, 4 figures, published in ApJ Letters, final version
Νομικές προκλήσεις της ενσωμάτωσης των τηλεπικοινωνιακών δορυφόρων στα δίκτυα 5G
Creators: name: Μουγκράκη, Αικατερίνη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Δίκτυα 5G
Τηλεπικοινωνιακοί Δορυφόροι
ΓΚΠΔ
5G Networks
Communication Satellites
GDPR

description: Η επαναστατική έλευση του 5G υπόσχεται πανταχού παρούσα συνδεσιμότητα για μεγάλο αριθμό συσκευών και ανταλλαγή τεράστιου όγκου δεδομένων με πολύ μικρή καθυστέρηση, διαδραματίζοντας κύριο ρόλο στον ψηφιακό μετασχηματισμό της οικονομίας και της κοινωνίας. Μολονότι τόσο τα δορυφορικά όσο και τα επίγεια δίκτυα μπορούν να παρέχουν υψηλούς ρυθμούς δεδομένων, οι δορυφόροι ειδικά μπορούν να επεκτείνουν την κάλυψη σε ευρείες περιοχές, συμπεριλαμβανομένων αγροτικών, αστικών και ωκεάνιων περιβαλλόντων. Η τάση όμως των νέων τεχνολογιών να εστιάζουν στην γρήγορη εξυπηρέτηση του κοινού έχει ως συνέπεια να παραβλέπεται η ασφάλεια και το απόρρητο των χρηστών. Η ευαλωτότητα των συστημάτων αυτών επηρεάζεται ακόμη περισσότερο με την ένταξη των τηλεπικοινωνιακών δορυφόρων στα δίκτυα 5G, εγείροντας τεχνικές και νομικές προκλήσεις ως προς την παγκόσμια εναρμόνιση και διαχείριση του φάσματος, την προστασία των δεδομένων προσωπικού χαρακτήρα και την διαστημική κυβερνοασφάλεια. Οι διατάξεις του διεθνούς διαστημικού δικαίου δεν προέβλεψαν κατά το χρόνο υπογραφής τους, την πρόοδο στις διαστημικές τεχνολογίες και στον τομέα των τηλεπικοινωνιών. Έτσι κρίνεται σημαντική η εξέταση των ζητημάτων αυτών σε διεθνές επίπεδο για την αναθεώρηση των υφιστάμενων διαστημικών συνθηκών ή την θέσπιση νεότερων κανόνων πιο επίκαιρων και αποτελεσματικών.
description: The revolutionary advent of 5G promises ubiquitous connectivity for a large number of devices and the exchange of huge amounts of data with very little latency, playing a key role in the digital transformation of the economy and society. While both satellite and terrestrial networks can deliver high data rates, satellites in particular can extend coverage to wide areas, including rural, urban and oceanic environments. But the tendency of new technologies to focus on serving the public quickly has meant that the security and privacy of users has been overlooked. The vulnerability of these systems is further affected by the integration of telecommunication satellites into 5G networks, raising technical and legal challenges in terms of global harmonisation and spectrum management, personal data protection and space cybersecurity. At the time of their signature, the provisions of international space law did not foresee advances in space technologies and in the field of telecommunications. It is therefore important to consider these issues at the international level in order to revise the existing space treaties or to adopt newer rules that are more timely and effective.
European CCs landscape and first release of CCs Registry created
Creators: name: Berberi, Lisana
name: Sánchez, Marina
name: Ukar, Inaki
name: Gaido, Luciano
name: Paolini, Gabriella
name: Di Giorgio, Sara
name: Lazzeri, Emma
Publisher: name: Zenodo
Year: 2023
Subjects: Open Science
Competence Centre
EOSC
FAIR

description: This document serves as a confirmation of the accomplishment of the first milestone of WP7 of the Skills4EOSC Project - the preliminary landscaping of existing European Competence Centres and a first release of the Registry containing selected Competence Centres.
Probing the exchange field of a quantum-dot spin valve by a superconducting lead
Creators: name: Sothmann, Björn
name: Futterer, David
name: Governale, Michele
name: König, Jürgen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Electrons in a quantum-dot spin valve, consisting of a single-level quantum dot coupled to two ferromagnetic leads with magnetizations pointing in arbitrary directions, experience an exchange field that is induced on the dot by the interplay of Coulomb interaction and quantum fluctuations. We show that a third, superconducting lead with large superconducting gap attached to the dot probes this exchange field very sensitively. In particular, we find striking signatures of the exchange field in the symmetric component of the supercurrent with respect to the bias voltage applied between the ferromagnets already for small values of the ferromagnets' spin polarization.
description: published version, 10 pages, 7 figures
Το τραύμα του Εμφυλίου πίσω από μια φωτογραφία
Creators: name: Νασιώκα, Ολυμπία Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Εμφύλιος πόλεμος
Τραύμα
Προφορικές μαρτυρίες
Civil war
Trauma
Oral testimonies

description: Η μελέτη με τίτλο: «Το τραύμα του Εμφυλίου πίσω από μια φωτογραφία» αποσκοπεί στην προσέγγιση τραυματικών εμπειριών και την ανάδειξη του τραύματος του Ελληνικού Εμφυλίου πολέμου, έτσι όπως αυτό καταγράφηκε μέσα από τρεις σχετιζόμενες μεταξύ τους προφορικές μαρτυρίες τριών διαφορετικών, αλλά συγγενών μεταξύ τους αφηγητών. Σκοπός είναι, μέσω μιας προσωπικής ιστορίας αλλά και των μικροϊστοριών που την περιστοιχίζουν, να φανούν οι πτυχές που δομούν την έννοια του τραύματος ανθρώπων που έζησαν ή βίωσαν την οδύνη και τις συνέπειες του Εμφυλίου. Το βασικό ερευνητικό ερώτημα που τίθεται αφορά στο παιδί της φωτογραφίας που γεννήθηκε στη δίνη του Εμφυλίου. Τι σχέση έχει με ο τραυματικό του παρελθόν, πώς το διαχειρίζεται και πώς το αφηγείται; Η μελέτη αρθρώνεται με οδηγό τρεις βασικούς θεωρητικούς άξονες των εννοιών που σχετίζονται με τη Μνήμη, το Τραύμα και την Προφορική Ιστορία, καθώς μέσω αυτών υποστηρίζεται και κατανοείται το δεύτερο και πρωτογενές μέρος της μελέτης, το οποίο αφορά στην κατάθεση των μαρτυριών, το συσχετισμό, την ανάλυση και το σχολιασμό τους. Ο τόπος, ως αναπόσπαστο μέρος της ταυτότητας των αφηγητών, οι τραυματικές εμπειρίες του Εμφυλίου, αλλά και όλα τα γεγονότα που ακολούθησαν, φανερώνουν την ύπαρξη του τραύματος, τη θέληση για τη διαγραφή ή την αποσιώπησή του και τους μηχανισμούς της διεργασίας του.
description: This thesis, entitled "The trauma of the Civil War behind a photograph" aims to approach the traumatic experiences and to highlight the trauma of the Greek Civil War, as it was recorded through three related oral testimonies by three different narrators related to each other. Aim of this thesis is to delve into the aspects that form the concept of personal trauma of people who lived or experienced the pain and consequences of the Civil War, as seen through a personal story but also through the small stories that surround it. The main research question is whether the child of the photo, who was born in the midst of the civil war, can distance itself from the past, find ways to manage the trauma and narrate it. The study is articulated in three main theoretical axes based on concepts related to Memory, Trauma and Oral History, through which the second part of the study, which concerns the correlation, analysis and commentary of the testimonies, is supported and understood. The place, as an integral part of the narrators' identity, the traumatic experiences of the Civil War and all the events that followed, reveal the existence of trauma, the will to erase it or silence it, as well as the mechanisms of its process.
description: Σε συνεργασία με: Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Emergent relativistic-like Kinematics and Dynamical Mass Generation for a Lifshitz-type Yukawa model
Creators: name: Alexandre, J.
name: Mavromatos, N. E.
name: Yawitch, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the Infra Red (IR) limit of dispersion relations for scalar and fermion fields in a Lifshitz-type Yukawa model, after dressing by quantum fluctuations. Relativistic-like dispersion relations emerge dynamically in the IR regime of the model, after quantum corrections are taken into account. In this regime, dynamical mass generation also takes place, but in such a way that the particle excitations remain massive, even if the bare masses vanish. The group velocities of the corresponding massive particles of course are smaller than the speed of light, in a way consistent with the IR regime where the analysis is performed. We also comment on possible extensions of the model where the fermions are coupled to an Abelian gauge field.
Chiral two-body currents in nuclei: Gamow-Teller transitions and neutrinoless double-beta decay
Creators: name: Menéndez, J.
name: Gazit, D.
name: Schwenk, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We show that chiral effective field theory (EFT) two-body currents provide important contributions to the quenching of low-momentum-transfer Gamow-Teller transitions, and use chiral EFT to predict the momentum-transfer dependence that is probed in neutrinoless double-beta decay. We then calculate for the first time the neutrinoless double-beta decay operator based on chiral EFT currents and study the nuclear matrix elements at successive orders. The contributions from chiral two-body currents are significant and should be included in all calculations.
description: 4 pages, 3 figures; improved version, with clarifications and added references
Untersuchung von photoinduziertem Elektronentransfer in modifizierter DNA und bioorthogonaler Diels-Alder-Konjugation
Creators: name: Bätzner, Effi
Publisher: name: Karlsruhe
Year: 2014
Subjects: photoinduzierter Elektronentransfer
DNA
Tetrazin
COMBO
iEDDA

description: Das artifizielle HQ-HQ-Basenpaar konnte als Strangbruchsonde und als intermediärer Ladungsüberträger für den photoinduzierten Elektronentransfer in DNA mit einem neuen ED-, EA-System eingesetzt und analysiert werden. Ein neues Tetrazinnukleosid konnte hergestellt werden, welches über die automatisierte Festphasensynthese in DNA eingebracht und onbead mit einem cyclooktinmodifizierten Fluoreszeinbaustein mittels Diels-Alder Reaktion mit inversem Elektronenbedarf zur Reaktion gebracht werden.
Electrostatic Structures in Space Plasmas: Stability of Two-dimensional Magnetic Bernstein-Greene-Kruskal Modes
Creators: name: Ng, C. S.
name: Soundararajan, S. J.
name: Yasin, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Electrostatic structures have been observed in many regions of space plasmas, including the solar wind, the magnetosphere, the auroral acceleration region, and in association with shocks, turbulence, and magnetic reconnection. Due to potentially large amplitude of electric fields within these structures, their effects on particle heating, scattering, or acceleration can be important. One possible theoretical description of some of these structures is the concept of Bernstein-Greene-Kruskal (BGK) modes, which are exact nonlinear solutions of the Vlasov-Poisson system of equations in collisionless kinetic theory. BGK modes have been studied extensively for many decades, predominately in one dimension (1D), although there have been observations showing that some of these structures have clear 3D features. While there have been approximate solutions of higher dimensional BGK modes, an exact 3D BGK mode solution in a finite magnetic field has not been found yet. Recently we have constructed exact solutions of 2D BGK modes in a magnetized plasma with finite magnetic field strength in order to gain insights of the ultimate 3D theory [Ng, Bhattacharjee, and Skiff, Phys. Plasmas 13, 055903 (2006)]. Based on the analytic form of these solutions, as well as Particle-in-Cell (PIC) simulations, we will present numerical studies of their stability for different levels of background magnetic field strength.
description: Submitted to AIP Journal Proceedings for "Tenth Annual International Astrophysics Conference"
Electronic transport through correlated nanostructures: molecular diodes and steady state currents = Elektronischer Transport durch korrelierte Nanostrukturen: molekulare Dioden und Ströme in stationären Zuständen
Creators: name: Collet, Tim David
Publisher: name: Karlsruhe
Year: 2014
Subjects: Transport
One-dimensional
Simulation
Steady state currents
Minimal diode

description: This thesis is on the topic of time-resolved numerical transport simulations of microscopic one-dimensional correlated systems out of equilibrium.
The key new results include:
The investigation of minimal models of molecular diodes.
Investigation of an extension of the used simulation method, which is based on td-DMRG, to driven systems.
The proposal of Energetic Damping to create steady states in time-dependent simulations of correlated finite systems with small energy scales.
Fatigue in Cancer and Neuroinflammatory and Autoimmune Disease: CNS Arousal Matters
Creators: name: Ulke, Christine
name: Surova, Galina
name: Sander, Christian
name: Engel, Christoph
name: Wirkner, Kerstin
name: Jawinski, Philippe
name: Hensch, Tilman
name: Hegerl, Ulrich
Publisher: name: Humboldt-Universität zu Berlin
Year: 2020
Subjects: subject: depression
subject: fatigue
subject: electroencephalography
subject: hyperarousal
subject: neurophysiology
subject: 570 Biologie

description: The term fatigue is not only used to describe a sleepy state with a lack of drive, as observed in patients with chronic physical illnesses, but also a state with an inhibition of drive and central nervous system (CNS) hyperarousal, as frequently observed in patients with major depression. An electroencephalogram (EEG)-based algorithm has been developed to objectively assess CNS arousal and to disentangle these pathophysiologically heterogeneous forms of fatigue. The aim of this study was to test the hypothesis that fatigued patients with CNS hyperarousal score higher on depressive symptoms than those without this neurophysiological pattern. Methods: Subjects with fatigue (Multidimensional Fatigue Inventory sum-score > 40) in the context of cancer, neuroinflammatory, or autoimmune diseases were drawn from the 60+ cohort of the Leipzig Research Center for Civilization Diseases. CNS arousal was assessed by automatic EEG-vigilance stage classification using the Vigilance Algorithm Leipzig (VIGALL 2.1) based on 20 min EEG recordings at rest with eyes closed. Depression was assessed by the Inventory of Depressive Symptomatology (IDS-SR). Results: Sixty participants (33 female; median age: 67.5 years) were included in the analysis. As hypothesized, fatigued patients with CNS hyperarousal had higher IDS-SR scores than those without hyperarousal (F1,58 = 18.34; p < 0.0001, η2 = 0.240). Conclusion: hyperaroused fatigue in patients with chronic physical illness may be a sign of comorbid depression.
title: Редкий случай нарушения цикла мочевины у ребенка на фоне коронавирусной инфекции
Creators: name: Колягин, Михаил
name: Хишам, Кхазин
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье представлены результаты негативного воздействия нарушения цикла мочевины и коронавирусной инфекции на организм ребенка. Проанализирована история болезни ребенка с данными клиническими диагнозами и произведён разбор патологических изменений в организме, послуживщих непосредственной причиной гибели. Выявлено, что наслоение коронавирусной инфекции усугубляет тяжесть состояния и способствует прогрессированию основного заболевания, а вопросы патогенеза требуют дальнейшего исследования.
Μοριακή επιδημιολογία Εντεροκόκκων ανθεκτικών στην βανκομυκίνη στο Π.Γ.Ν.Θ ΑΧΕΠΑ κατά το έτος 2021
Creators: name: Πανίδου Τσούλου, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Εντερόκοκκος
Αντοχή στην Βανκομυκίνη
Μοριακή Επιδημιολογία
Enterococcus
Vancomycin- Resistant
Molecular epidemiology

description: Οι ανθεκτικοί στη βανκομυκίνη Εντερόκοκκοι (Vancomycin-Resistant Enterococci, VRE) είναι ευκαιριακά παθογόνοι μικροοργανισμοί και αποτελούν συχνό αίτιο ενδονοσοκομειακών λοιμώξεων. Η αντοχή που εμφανίζουν σε ένα ευρύ φάσμα αντιβιοτικών δυσχεραίνει την αντιμετώπισή των λοιμώξεων που προκαλούν ενώ παράλληλα διευκολύνει τη μετάδοσή τους εντός του νοσοκομείου. Σκοπός της παρούσας μελέτης ήταν η διερεύνηση των μηχανισμών αντοχής των VRE στελεχών που απομονώθηκαν στο Π.Γ.Ν.Θ ΑΧΕΠΑ το έτος 2021 και η ανίχνευση του τρόπου μετάδοσης τους. Συγκεκριμένα από τα 140 κλινικά στελέχη Εντερόκοκκου με αντοχή στη βανκομυκίνη προερχόμενα από δείγματα νοσηλευόμενων ασθενών σε κλινικές του νοσοκομείου ΑΧΕΠΑ επιλέχθηκαν τυχαία 44 στελέχη και σε αυτά πραγματοποιήθηκε πολυπλεκτική αλυσιδωτή αντίδραση πολυμεράσης για την ανίχνευση των γονιδίων αντοχής στη βανκομυκίνη (vanA, vanB, vanC, vanD, vanE, vanG) με τους αντίστοιχους εκκινητές. Επιπλέον για τη διερεύνηση κλωνικής συγγένειας των 44 επιλεγμένων στελεχών διενεργήθηκε ηλεκτροφόρηση σε παλλόμενο ηλεκτρικό πεδίο (PFGE). Από την μοριακή ανάλυση που πραγματοποιήθηκε βρέθηκε ότι 36 από τα 44 στελέχη (81,9%) διέθεταν το vanA γονίδιο αντοχής στη βανκομυκίνη, ενώ τα 7 (15,9%) έφεραν ταυτόχρονα τα γονίδια vanA και vanB. Επιπλέον, από την ανάλυση των αποτελεσμάτων της PFGE των 44 VRE στελεχών ταυτοποιήθηκαν 37 διαφορετικά ηλεκτροφορητικά πρότυπα (παλσότυποι). Με ποσοστό ομολογίας 75% οι παλσότυποι διαχωρίσθηκαν σε 4 κλάδους (clusters).
description: Αγγλική Περίληψη: Vancomycin-Resistant Enterococci (VRE) are opportunistic pathogens and have been a frequent cause of nosocomial infections. Their resistance to a wide range of antibiotics increases the difficulty of treatment and facilitates their spread within healthcare settings. The aim of the study was to investigate the resistance mechanisms of VRE strains isolated at the AHEPA hospital and to detect the mode of their transmission. Specifically, from 140 clinical VRE isolated in 2021, 44 isolates were randomly selected for further molecular investigation. More specific, vancomycin resistance genes (vanA, vanB, vanC, vanD, vanE, vanG) were examined by multiplex PCR as well as genetic typing using pulsed field electrophoresis (PFGE). By multiplex PCR 36/44 strains (81.9%) harboured vanA gene, while 7 (15.9%) strains carried both the vanA and vanB genes. The PFGE pattern of SmaI restricted chromosomal DNA from the 44 VRE isolates identified 37 different pulsotypes and revealed 4 main clusters using a similarity cut-off >75%.
Exact factorization of the time-dependent electron-nuclear wavefunction
Creators: name: Abedi, Ali
name: Maitra, Neepa T.
name: Gross, E. K. U.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present an exact decomposition of the complete wavefunction for a system of nuclei and electrons evolving in a time-dependent external potential. We derive formally exact equations for the nuclear and electronic wavefunctions that lead to rigorous definitions of a time-dependent potential energy surface (TDPES) and a time-dependent geometric phase. For the $H_2^+$ molecular ion exposed to a laser field, the TDPES proves to be a useful interpretive tool to identify different mechanisms of dissociation.
description: 4 pages, 2 figures
A micromechanics-enhanced finite element formulation for modelling heterogeneous materials
Creators: name: Novák, J.
name: Kaczmarczyk, Ł.
name: Grassl, P.
name: Zeman, J.
name: Pearce, C. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the analysis of composite materials with heterogeneous microstructures, full resolution of the heterogeneities using classical numerical approaches can be computationally prohibitive. This paper presents a micromechanics-enhanced finite element formulation that accurately captures the mechanical behaviour of heterogeneous materials in a computationally efficient manner. The strategy exploits analytical solutions derived by Eshelby for ellipsoidal inclusions in order to determine the mechanical perturbation fields as a result of the underlying heterogeneities. Approximation functions for these perturbation fields are then incorporated into a finite element formulation to augment those of the macroscopic fields. A significant feature of this approach is that the finite element mesh does not explicitly resolve the heterogeneities and that no additional degrees of freedom are introduced. In this paper, hybrid-Trefftz stress finite elements are utilised and performance of the proposed formulation is demonstrated with numerical examples. The method is restricted here to elastic particulate composites with ellipsoidal inclusions but it has been designed to be extensible to a wider class of materials comprising arbitrary shaped inclusions.
description: 28 pages, 12 figures, 2 tables
Did a 1-dimensional magnet detect a 248-dimensional Lie algebra?
Creators: name: Borthwick, David
name: Garibaldi, Skip
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 82-02 (primary), 17B25 (secondary)

description: About a year ago, a team of physicists reported in Science that they had observed "evidence for E8 symmetry" in the laboratory. This expository article is aimed at mathematicians and explains the chain of reasoning connecting measurements on a quasi-1-dimensional magnet with a 248-dimensional Lie algebra.
description: v2: Added some material clarifying the word "evidence" and the precise role of E8 in the theory // v3: many small changes to the exposition
Anomalous Temperature Dependence of the Superfluid Density Caused by Dirty-to-Clean Crossover in FeSe$_{0.4}$Te$_{0.6}$ Single Crystals
Creators: name: Takahashi, Hideyuki
name: Imai, Yoshinori
name: Komiya, Seiki
name: Tsukada, Ichiro
name: Maeda, Atsutaka
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report microwave surface impedances of FeSe$_{0.4}$Te$_{0.6}$ single crystals measured at 12, 19, and 44 GHz. The penetration depth exhibits a power law behavior, $δλ_L=λ_L (T)-λ_L (0) \propto CT^n$ with an exponent $n\simeq 2$, which is considered to result from impurity scattering. This behavior is consistent with $s\pm$-wave pairing symmetry. The temperature dependence of the superfluid density largely deviates from the behavior expected in the BCS theory. We believe that this deviation is caused by the crossover from the dirty regime near $T_c$ to the clean regime at low temperatures, which is supported by the rapid increase of the quasiparticle scattering time obtained from the microwave conductivity. We also believe that the previously published data of the superfluid density can be interpreted in this scenario.
description: 4 pages, 4 figures
Non-commutative Einstein equations and Seiberg-Witten map
Creators: name: Aschieri, Paolo
name: Di Grezia, Elisabetta
name: Esposito, Giampiero
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Seiberg--Witten map is a powerful tool in non-commutative field theory, and it has been recently obtained in the literature for gravity itself, to first order in non-commutativity. This paper, relying upon the pure-gravity form of the action functional considered in Ref. 2, studies the expansion to first order of the non-commutative Einstein equations, and whether the Seiberg--Witten map can lead to a solution of such equations when the underlying classical geometry is Schwarzschild.
description: 6 and 1/2 pages, based on talk prepared for the Friedmann Seminar, May-June 2011. In the final version, the presentation has been improved, including a better notation
69951: Villages at War
Creators: name: Project Team, Oxford At War
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Longworth & District History Society have done research on local World War One soldiers. Information about the soldiers and their families has has been gathered from a variety of sources and is now displayed on the 'Villages at War' website.
Jugendliche Aneignungsformen des öf-fentlichen Raums – am Beispiel der Gemeinde Bassersdorf
Creators: name: Camenzind, Rebecca
Publisher: name: Zenodo
Year: 2021

description: Jugendliche aller Altersklassen verbringen einen grossen Teil ihrer Freizeit im öffent-lichen Raum und agieren dort miteinander sowie mit ihrer Umwelt. Dabei beeinflus-sen sich Umwelt, Anspruchsgruppen und Jugendliche wechselseitig, was für letztere sowohl Möglichkeiten als auch Herausforderungen mit sich bringt – stets unter der Prämisse, dass Jugendliche den öffentlichen Raum unter den gegebenen, aber wan-delbaren, Strukturen optimal nutzen wollen. Vorliegende Arbeit untersucht das Aneignungsverhalten solcher Jugendlicher in der Schweizer Gemeinde Bassersdorf mit dem Ziel, Chancen und Hindernisse ihrer Freizeitgestaltung auf Basis theoreti-scher Überlegungen besser zu verstehen, um die Neuausrichtung hin zu einer sozial-räumlich-orientierten Jugendarbeit zu unterstützen und konkrete Handlungsempfeh-lungen abzuleiten. Für männliche Jugendliche stellt die Arbeit fest, dass geschützte und exklusive Rückzugsorte eine starke Relevanz besitzen – und das diese Gruppe äussere Strukturen und Verhaltensmuster sehr sensibel reflektiert. Für weibliche Ju-gendliche muss hingegen erst ein Angebot geschaffen werden, da diese Gruppe sehr zurückhaltend in der Öffentlichkeit auftritt und sich offensichtlich noch keinen eigenen Raum geschaffen hat. Da jeder Mensch den öffentlichen Raum für seine Bedürfnisse nutzen können sollte, muss hier insbesondere die Jugendarbeit unter-stützend ansetzen und sich auch auf politischer Ebene für die Jugendlichen einset-zen. Da die Jugend generell durch starke Dynamik gekennzeichnet ist, kann auch deren Unterstützung nur als dauerhafter dynamischer Prozess beschrieben werden, für den es kein konkretes Endziel gibt – welcher es aber versteht, immer wieder neu wandelnde Bedürfnisse zu erkennen und auf diese einzugehen.
description: + Code Diss LU: hslusa masa + Fussnote: Master of Science in Sozialer Arbeit, Bern, Luzern, St. Gallen, 2021 + NL-Code: NLLUHSA202109
JM-ECS: A hybrid method combining the $J$-matrix and ECS methods for scattering calculations
Creators: name: Bidasyuk, Y.
name: Vanroose, W.
name: Broeckhove, J.
name: Arickx, F.
name: Vasilevsky, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The paper proposes a hybrid method for calculating scattering processes that combines the $J$-matrix method with exterior complex scaling as an absorbing boundary condition. It represents the wave function as a finite sum of oscillator eigenstates in the inner region and on grid in the outer region. The method is validated for one and two dimensional model partial wave equation equations. Finally, the method calculates nuclear $p$-shell scattering.
Dynamics at and near conformal quantum critical points
Creators: name: Isakov, S. V.
name: Fendley, P.
name: Ludwig, A. W. W.
name: Trebst, S.
name: Troyer, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the dynamical behavior at and near a special class of two-dimensional quantum critical points. Each is a conformal quantum critical point (CQCP), where in the scaling limit the equal-time correlators are those of a two-dimensional conformal field theory. The critical theories include the square-lattice quantum dimer model, the quantum Lifshitz theory, and a deformed toric code model. We show that under generic perturbation the latter flows toward the ordinary Lorentz-invariant (2+1) dimensional Ising critical point, illustrating that CQCPs are generically unstable. We exploit a correspondence between the classical and quantum dynamical behavior in such systems to perform an extensive numerical study of two lines of CQCPs in a quantum eight-vertex model, or equivalently, two coupled deformed toric codes. We find that the dynamical critical exponent z remains 2 along the U(1)-symmetric quantum Lifshitz line, while it continuously varies along the line with only Z_2 symmetry. This illustrates how two CQCPs can have very different dynamical properties, despite identical equal-time ground-state correlators. Our results equally apply to the dynamics of the corresponding purely classical models.
description: 13 pages, 11 figures. v2: title change, added discussion of systematic error, fixed typos
Reformulation of the Covering and Quantizer Problems as Ground States of Interacting Particles
Creators: name: Torquato, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Metric Geometry (math.MG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We reformulate the covering and quantizer problems as the determination of the ground states of interacting particles in $\mathbb{R}^d$ that generally involve single-body, two-body, three-body, and higher-body interactions. This is done by linking the covering and quantizer problems to certain optimization problems involving the "void" nearest-neighbor functions that arise in the theory of random media and statistical mechanics. These reformulations, which again exemplifies the deep interplay between geometry and physics, allow one now to employ theoretical and numerical optimization techniques to analyze and solve these energy minimization problems. The covering and quantizer problems have relevance in numerous applications, including wireless communication network layouts, the search of high-dimensional data parameter spaces, stereotactic radiation therapy, data compression, digital communications, meshing of space for numerical analysis, and coding and cryptography, among other examples. The connections between the covering and quantizer problems and the sphere-packing and number-variance problems are discussed. We also show that disordered saturated sphere packings provide relatively thin (economical) coverings and may yield thinner coverings than the best known lattice coverings in sufficiently large dimensions. In the case of the quantizer problem, we derive improved upper bounds on the quantizer error using sphere-packing solutions, which are generally substantially sharper than an existing upper bound in low to moderately large dimensions. We also demonstrate that disordered saturated sphere packings yield relatively good quantizers. Finally, we remark on possible applications of our results for the detection of gravitational waves.
description: 52 pages, 9 figures, 8 tables; Changes reflect improvements made during the refereeing process
Fermionic T-duality and momenta noncommutativity
Creators: name: Nikolic, Bojan
name: Sazdovic, Branislav
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we establish the relationship between fermionic T-duality and momenta noncommuativity. This is extension of known relation between bosonic T-duality and coordinate noncommutativity. The case of open string propagating in background of the type IIB superstring theory has been considered. We perform T-duality with respect to the fermionic variables instead to the bosonic ones. We also choose Dirichlet boundary conditions at the string endpoints, which lead to the momenta noncommutativity, instead Neumann ones which lead to the coordinates noncommutativity. Finally, we establish the main result of the article that momenta noncommutativity parameters are just fermionic T-dual fields.
description: 15 pages, 1 table
Skin layer of BiFeO3 single crystals
Creators: name: Marti, X.
name: Ferrer, P.
name: Herrero-Albillos, J.
name: Narvaez, J.
name: Holy, V.
name: Barrett, N.
name: Alexe, M.
name: Catalan, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A surface layer ("skin") that is functionally and structurally different from the bulk was found in single crystals of BiFeO3. Impedance analysis indicates that a previously reported anomaly at T* ~ 275 \pm 5 ^/circC corresponds to a phase transition confined at the surface of BiFeO3. X-ray photoelectron spectroscopy and X-ray diffraction as a function of both incidence angle and photon wavelength unambiguously confirm the existence of a skin with an estimated skin depth of few nanometres, elongated out-of-plane lattice parameter, and lower electron density. Temperature-dependent x-ray diffraction has revealed that the skin's out of plane lattice parameter changes abruptly at T*, while the bulk preserves an unfeatured linear thermal expansion. The distinct properties of the skin are likely to dominate in large surface to volume ratios scenarios such as fine grained ceramics and thin films, and should be particularly relevant for electronic devices that rely on interfacial couplings such as exchange bias.
description: 8 pages, 4 figures
Baxter operators for arbitrary spin
Creators: name: Chicherin, D.
name: Derkachov, S.
name: Karakhanyan, D.
name: Kirschner, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We construct Baxter operators for the homogeneous closed $\mathrm{XXX}$ spin chain with the quantum space carrying infinite or finite dimensional $s\ell_2$ representations. All algebraic relations of Baxter operators and transfer matrices are deduced uniformly from Yang-Baxter relations of the local building blocks of these operators. This results in a systematic and very transparent approach where the cases of finite and infinite dimensional representations are treated in analogy. Simple relations between the Baxter operators of both cases are obtained. We represent the quantum spaces by polynomials and build the operators from elementary differentiation and multiplication operators. We present compact explicit formulae for the action of Baxter operators on polynomials.
description: 37 pages LaTex, 7 figures, version for publication