cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bernd Ulrich Hucker, Eugen Kotte, Christine Vogel (Hrsg.), Die Marienburg. Vom Machtzentrum des Deutschen Ordens zum mitteleuropäischen Erinnerungsort
Creators: name: Stachowiak, Remigius
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2016

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 65 Nr. 1 (2016): Samizdat and Alternative Ways of Communications
Collective relaxation dynamics in a three-dimensional lattice glass model
Creators: name: Nishikawa, Yoshihiko
name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We numerically elucidate the microscopic mechanisms controlling the relaxation dynamics of a three-dimensional lattice glass model that has static properties compatible with the approach to a random first-order transition. At low temperatures, the relaxation is triggered by a small population of particles with low-energy barriers forming mobile clusters. These emerging quasiparticles act as facilitating defects responsible for the spatially heterogeneous dynamics of the system, whose characteristic lengthscales remain strongly coupled to thermodynamic fluctuations. We compare our findings both with existing theoretical models and atomistic simulations of glass-formers.
description: 7 pages, 5 figures + supplemental material
The prose of Zhu Ziqing
Creators: name: Crofts, Iain William
Publisher: name: University of British Columbia
Year: 2010

description: Zhu Ziqing was a Chinese academic who developed a reputation first as a poet and later as an essayist in the 1920's and 1930's. His works are still read widely in China and are considered important enough to be included in the curriculum of secondary schools and universities in the People's Republic of China, Hong Kong and Taiwan. Despite his enduring reputation among his countrymen, he is little known abroad and Western scholarly works on modern Chinese literature scarcely mention him. This thesis examines Zhu Ziqing's prose, since it is his essays which are the basis of his reputation. His short stories are examined first, as the precursors to his essays, with which they have much in common. The essays are presented in categories according to their subject matter, and representative works from each category are examined in detail. It becomes clear that the most noticeable characteristic of Zhu Ziqing's writings is their autobiographical nature. He is at his best when writing about things with which he is intimately acquainted, and his attempts to grapple with wider social issues tend to be inconclusive. Zhu Ziqing is known principally as a lyric essayist, a "painter of pictures with words." The scenes which he describes are often marked by his presence, linked by the autobiographical thread which runs through all his work. Concerned as they are with painting delightful scenes rather than making any profound statements, lyric essays are not calculated to offend anyone's ideological sensibilities. This, combined with the inconclusive nature of Zhu Ziqing's attempts at weightier social pronouncements, accounts for the availability of his works on both sides of the Taiwan Strait. One may concede that Zhu Ziqing is but a minor planet in the Chinese literary firmament. Nevertheless, his short stories and essays are Interesting as examples of prose which was highly regarded by the author's contemporaries in the early days of modern Chinese vernacular literature.
An Attempt Towards Field Theory of D0 Branes -- Quantum M-Field Theory
Creators: name: Yoneya, Tamiaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I discuss my recent attempt in search of a new framework for quantum field theory of D branes. After explaining some motivations in the background of this project, I present, as a first step towards our goal, a second-quantized reformulation of the U(N) Yang-Mills quantum mechanics in which the D0-brane creation-and-annihilation fields connecting theories with different N are introduced. Physical observables are expressed in terms of bilinear forms of the D0 fields. The large N limit is briefly treated using this new formalism.
description: 8 pages, 2 figures, based on an invited talk presented at the international workshop "Progress of String Theory and Quantum Field Theory" ( Osaka City University, December 7-10, 2007), to be published in the proceedings
Stefan Troebst (Hrsg.), Postdiktatorische Geschichtskulturen im Süden und Osten Europas. BestandsaufBestandsaufnahme und Forschungsperspektiven
Creators: name: Münch, Felix
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2011

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 60 Nr. 3 (2011)
Polska i sąsiedzi. Studia z dziejów kultury, gospodarki i myśli politycznej. Księga pamiątkowa ofiarowana profesorowi Marianowi Mroczce w 70. rocznicę urodzin
Creators: name: Hartmann, Stefan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2010

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 59 Nr. 2 (2010)
Additional file 2 of Mental illness and suicidality among Roma and traveller communities in the UK, Ireland, and other countries: a systematic review
Creators: name: Dagli, Arav
name: Webb, Roger T.
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Mental Health

description: Additional file 2. The JBI Quality Appraisal Checklists for each study included in the review, organized in alphabetical order.
Hierarchy of inequalities for quantitative duality
Creators: name: Martinez-Linares, Jesus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive different relations quantifying duality in a generic two-way interferometer. These relations set different upper bounds to the visibility V of the fringes measured at the output port of the interferometer. A hierarchy of inequalities is presented which exhibits the influence of the availability to the experimenter of different sources of which-way information contributing to the total distinguishability D of the ways. For mixed states and unbalanced interferometers an inequality is derived, V^2+ Xi^2 \leq 1, which can be more stringent than the one associated with the distinguishability (V^2+ D^2 \leq 1).
description: 7 pages, 4 figures
Detecting General Relativistic Orbital Precession in Transiting Hot Jupiters
Creators: name: Antoniciello, G.
name: Borsato, L.
name: Lacedelli, G.
name: Nascimbeni, V.
name: Barragán, O.
name: Claudi, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Both classical and relativistic weak-field and slow-motion perturbations to planetary orbits can be treated as perturbative corrections to the Keplerian model. In particular, tidal forces and General Relativity (GR) induce small precession rates of the apsidal line. Accurate measurements of these effects in transiting exoplanets could be used to test GR and to gain information about the planetary interiors. Unfortunately, models for transiting planets have a high degree of degeneracy in the orbital parameters that, combined to the uncertainties of photometric transit observations, results in large errors on the determinations of the argument of periastron and precludes a direct evaluation of the apsidal line precession. Moreover, tidal and GR precession time-scales are many order of magnitudes larger than orbital periods, so that on the observational time-spans required to cumulate a precession signal enough strong to be detected, even small systematic errors in transit ephemerides add up to cancel out the tiny variations due to precession. Here we present a more feasible solution to detect tidal and GR precession rates through the observation of variations of the time interval ($Δτ$) between primary and secondary transits of hot Jupiters and propose the most promising target for such detection, WASP-14 b. For this planet we expect a cumulated $Δτ$ $\approx$ -250 s, due to tidal and relativistic precession, since its first photometric observations.
description: This paper has been accepted for publication by MNRAS
Constructing QFT's wherein Lorentz Invariance is broken by dissipative effects in the UV
Creators: name: Parentani, Renaud
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There has been a recent interest in considering Quantum Field Theories in which Lorentz Invariance is broken in the UV sector. However attention has been mostly limited to dispersive theories. In this work we provide the generalized settings for studying dissipation. Unitarity is preserved by coupling the original fields to additional (heavy) fields which induce the dissipation. Starting with Lagrangians breaking LI in the UV, we learn that dissipative effects unavoidably develop in the effective theory. We then covariantize these Lagrangians in order to address the trans-Planckian question of inflation and black hole physics. The peculiar properties of the additional fields inducing dissipation is revealed by the covariantization. The links with the phenomenological approach to Quantum Gravity and with some Brane World scenarios are also discussed.
description: 31 pages, 1 Figure, Proceedings of the SISSA conference: ``From Quantum to Emergent Gravity'' june 2007, * Added comments and references
Diffuse stellar emission in X-ray luminous galaxy clusters at z~0.3 I. Is the diffuse optical light boosted and rejuvenated in merging clusters?
Creators: name: Pierini, D.
name: Zibetti, S.
name: Braglia, F.
name: Boehringer, H.
name: Finoguenov, A.
name: Lynam, P. D.
name: Zhang, Y. -Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: [Abridged] We searched for diffuse stellar emission around BCGs in three of the most X-ray luminous clusters found at z~0.3 in the REFLEX cluster survey and observed with XMM-Newton. These systems (RXCJ0014.3-3022, RXCJ0232.2-4420, and RXCJ2308.3-0211) are in different dynamical states, as witnessed by their X-ray morphology and optical appearence (e.g. multiplicity of BCGs). [Abridged] Diffuse stellar emission is robustly detected down to a surface brightness of 26 R-mag/arcsec^2 (observed frame) around a total of seven BCGs, extending up to galactocentric distances of ~100 kpc. In particular, it surrounds a pair of BCGs in RXCJ0232.2-4420, while it bridges two BCGs associated with the minor subcomponent of the merging cluster RXCJ0014.3-3022. The diffuse light detected at the greatest distances from the BCGs of the rather regular clusters RXCJ0232.2-4420 and RXCJ2308.3-0211 follows the ICM distribution. Its B-R colour is consistent with the colours measured within the BCG effective radii. The diffuse light around the two pairs of BCGs in RXCJ0014.3-3022 exhibits bluer colours than the BCG central regions by up to 0.5 mag. If the contribution of the intracluster light (ICL) to the detected diffuse light around BCGs is not negligible, ICL and BCGs have similar stellar populations in relatively relaxed clusters. Merging on a cluster scale eventually adds gravitational stresses to BCGs and other galaxies in subcluster cores. This event may affect the properties of the diffuse stellar emission around BCGs. Shredding of star-forming, low-metallicity dwarf galaxies is favoured as the cause of the bluer B-R colours of the diffuse stellar component around the two pairs of BCGs in the merging cluster RXCJ0014.3-3022.
description: 20 pages including 3 tables and 11 low-resolution colour figures, accepted for publication in A&A
Kateřina Čapková, Czechs, Germans, Jews? National Identity and the Jews of Bohemia
Creators: name: Wessely, Katharina
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 2 (2014)
Ground state pseudoscalar mesons on the light front: from the light to heavy sector
Creators: name: Shi, Chao
name: Li, Ming
name: Chen, Xurong
name: Jia, Wenbao
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extract the leading Fock-state light front wave functions (LF-LFWFs) of both the light and heavy pseudoscalar mesons, e.g., the pion (at masses of 130 MeV, 310 MeV and 690 MeV), $η_c$ and $η_b$, from their covariant Bethe-Salpeter wave functions within the rainbow-ladder (RL) truncation. It is shown that the LF-LFWFs get narrower in $x$ (the longitudinal momentum fraction of meson carried by the quark) with the increasing current quark mass, and the leading twist parton distribution amplitudes (PDAs) inherit this feature. Meanwhile, we find in the pion the LF-LFWFs only contribute around 30\% to the total Fock-state normalization, indicating the presence of significant higher Fock-states within. In contrast, in the $η_c$ and $η_b$ the LF-LFWFs contribute more than $90$\%, suggesting the $Q\bar{Q}$ valence Fock-state truncation as a good approximation for heavy mesons. We thus study the 3-dimensional parton distributions of the $η_c$ and $η_b$ with the unpolarized generalized parton distribution function (GPD) and the transverse momentum dependent parton distribution function (TMD). Through the gravitational form factors in connection with the GPD, the mass radii of the $η_c$ and $η_b$ in the light-cone frame are determined to be $r_{E,{\rm LC}}^{η_c} =0.150$ fm and $r_{E,{\rm LC}}^{η_b} =0.089$ fm respectively.
description: 10 pages, 9 figures
Johannes Hoffmann (Hrsg.), Stereotypen, Vorurteile, Völkerbilder in Ost und West in Wissenschaft und Unterricht. Eine Bibliographie. Teil 4
Creators: name: Weger, Tobias
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
Chiral two-dimensional electron gas in a periodic magnetic field
Creators: name: Taillefumier, Mathieu
name: Dugaev, Vitalii
name: Canals, Benjamin
name: Lacroix, Claudine
name: Bruno, Patrick
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the energy spectrum and electronic properties of two-dimensional electron gas in a periodic magnetic field of zero average with a symmetry of triangular lattice. We demonstrate how the structure of electron energy bands can be changed with the variation of the field strength, so that we can start from nearly free electron gas and then transform it continuously to a system of essentially localized chiral electron states. We find that the electrons near some minima of the effective potential are responsible for occurrence of dissipationless persistent currents creating a lattice of current contours. The topological properties of the electron energy bands are also varied with the intensity of periodic field. We calculated the topological Chern numbers of several lower energy bands as a function of the field. The corresponding Hall conductivity is nonzero and, when the Fermi level lies in the gap, it is quantized.
description: 10 pages;9 figures;42 references
A pressure-free long-time stable reduced-order model for two-dimensional Rayleigh-Bénard convection
Creators: name: Chand, Krishan
name: Rosenberger, Henrik
name: Sanderse, Benjamin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 65M08, 76D05 (Primary)

description: The present work presents a stable POD-Galerkin based reduced-order model (ROM) for two-dimensional Rayleigh-Bénard convection in a square geometry for three Rayleigh numbers: $10^4$ (steady state), $3\times 10^5$ (periodic), and $6 \times 10^6$ (chaotic). Stability is obtained through a particular (staggered-grid) full-order model (FOM) discretization that leads to a ROM that is pressure-free and has skew-symmetric (energy-conserving) convective terms. This yields long-time stable solutions without requiring stabilizing mechanisms, even outside the training data range. The ROM's stability is validated for the different test cases by investigating the Nusselt and Reynolds number time series and the mean and variance of the vertical temperature profile. In general, these quantities converge to the FOM when increasing the number of modes, and turn out to be a good measure of accuracy. However, for the chaotic case, convergence with increasing numbers of modes is relatively difficult and a high number of modes is required to resolve the low-energy structures that are important for the global dynamics.
On the Initial Conditions in New Ekpyrotic Cosmology
Creators: name: Buchbinder, Evgeny I.
name: Khoury, Justin
name: Ovrut, Burt A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: New Ekpyrotic Cosmology is an alternative scenario of early universe cosmology in which the universe existed before the big bang. The simplest model relies on two scalar fields, whose entropy perturbation leads to a scale-invariant spectrum of density fluctuations. The ekpyrotic solution has a tachyonic instability along the entropy field direction which, a priori, appears to require fine-tuning of the initial conditions. In this paper, we show that these can be achieved naturally by adding a small positive mass term for the tachyonic field and coupling to light fermions. Then, for a wide range of initial conditions, the tachyonic field gets stabilized with the appropriate values well before the onset of the ekpyrotic phase. Furthermore, we show that ekpyrotic theory is successful in solving the flatness, horizon and homogeneity problems of standard big bang cosmology. Motivated by the analysis of the tachyonic instability, we propose a simplification of the model in terms of new field variables. Instead of requiring two exponential potentials, one for each scalar field, it suffices to consider a single nearly exponential potential for one of the fields and a tachyonic mass term along the orthogonal direction in field space. All other terms in the potential are essentially arbitrary. This greatly widens the class of ekpyrotic potentials and allows substantial freedom in determining the spectral index and possible non-Gaussianity. We present a generalized expression for the spectral index which is easily consistent with the observed red tilt. We also argue that for a wide range of potentials non-Gaussianity can be substantial, within the reach of current observations.
description: 54 pages, 9 figures. v2: typos corrected
Single-molecule vacuum Rabi splitting: four-wave mixing and optical switching at the single-photon level
Creators: name: Pscherer, André
name: Meierhofer, Manuel
name: Wang, Daqing
name: Kelkar, Hrishikesh
name: Martín-Cano, Diego
name: Utikal, Tobias
name: Götzinger, Stephan
name: Sandoghdar, Vahid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A single quantum emitter can possess a very strong intrinsic nonlinearity, but its overall promise for nonlinear effects is hampered by the challenge of efficient coupling to incident photons. Common nonlinear optical materials, on the other hand, are easy to couple to but are bulky, imposing a severe limitation on the miniaturization of photonic systems. In this work, we show that a single organic molecule acts as an extremely efficient nonlinear optical element in the strong coupling regime of cavity quantum electrodynamics. We report on single-photon sensitivity in nonlinear signal generation and all-optical switching. Our work promotes the use of molecules for applications such as integrated photonic circuits, operating at very low powers.
description: 6 pages, 4 figures
Karl-Heinz Willroth, Hans-Jürgen Beug, Friedrich Lüth, Frank Schopper (Hrsg.), Slawen an der unteren Mittelelbe. Untersuchungen zur ländlichen Besiedlung, zum Burgenbau, zu Besiedlungsstrukturen und zum Landschaftswandel
Creators: name: Klammt, Anne
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2016

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 65 Nr. 1 (2016): Samizdat and Alternative Ways of Communications
Verflochtene Erinnerungen. Polen und seine Nachbarn im 19. und 20. Jahrhundert
Creators: name: Hein-Kircher, Heidi
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2010

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 59 Nr. 2 (2010)
Lepton Flavour Violating Decays in the Littlest Higgs Model with T-Parity
Creators: name: Tarantino, Cecilia
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the results of an extensive analysis of lepton flavour violating decays in the Littlest Higgs model with T-parity (LHT). As lepton flavour violation is highly suppressed in the Standard Model by small neutrino masses, the LHT effects turn out to be naturally huge and could be seen in the near future experiments.
description: 3 pages, 1 table. Proceedings of the talk presented at the EPS Conference on High Energy Physics 2007, Manchester
Discovering interpretable elastoplasticity models via the neural polynomial method enabled symbolic regressions
Creators: name: Bahmani, Bahador
name: Suh, Hyoung Suk
name: Sun, WaiChing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Conventional neural network elastoplasticity models are often perceived as lacking interpretability. This paper introduces a two-step machine learning approach that returns mathematical models interpretable by human experts. In particular, we introduce a surrogate model where yield surfaces are expressed in terms of a set of single-variable feature mappings obtained from supervised learning. A post-processing step is then used to re-interpret the set of single-variable neural network mapping functions into mathematical form through symbolic regression. This divide-and-conquer approach provides several important advantages. First, it enables us to overcome the scaling issue of symbolic regression algorithms. From a practical perspective, it enhances the portability of learned models for partial differential equation solvers written in different programming languages. Finally, it enables us to have a concrete understanding of the attributes of the materials, such as convexity and symmetries of models, through automated derivations and reasoning. Numerical examples have been provided, along with an open-source code to enable third-party validation.
Precision cosmology and the stiff-amplified gravitational-wave background from inflation: NANOGrav, Advanced LIGO-Virgo and the Hubble tension
Creators: name: Li, Bohua
name: Shapiro, Paul R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The recent NANOGrav finding of a common-spectrum process has invited interpretations as possible evidence of a primordial stochastic gravitational-wave background (SGWB) stronger than predicted by standard inflation+LCDM. Such an SGWB would contribute an extra radiation component to the background Universe which may affect its expansion history. As such, it may help alleviate the current Hubble tension, a novel connection between gravitational waves and cosmology. We demonstrate this by considering a cosmological model, the "standard inflation + stiff amplification" scenario, with two components added to the LCDM model: a stiff component (w=1) and the primordial SGWB. Previously, we showed that even for standard inflation, the SGWB may be detectable at the high frequencies probed by laser interferometers, if it is amplified by a possible early stiff era after reheating. Models that boost the SGWB enough to cause significant backreaction, however, must still preserve the well-measured radiation-matter equality, as precision cosmology demands. For that, we calculate the fully-coupled evolution of the SGWB and expansion history, sampling parameter space (tensor-to-scalar ratio, reheating temperature and temperature at stiff-to-radiation equality). We then perform a joint analysis of the NANOGrav results and latest upper bounds from Planck, big bang nucleosynthesis and Advanced LIGO-Virgo, to constrain the model. The resulting blue-tilted, stiff-amplified SGWB is still too small to explain the NANOGrav results. However, if someday, Advanced LIGO-Virgo detects the SGWB, our model can explain it within standard inflation (without requiring an initial blue tilt). Meanwhile, this model may bring current high-z measurements of the Hubble constant within 3.4 sigma of the low-z measurements by SH0ES (from 4.4 sigma) and within 2.6 sigma of those by H0LiCOW (from 3.1 sigma), reducing the tension.
description: 31 pages, 11 figures. Published in JCAP. (This version) Updated to match the published version
The Phases of Non-Compact QED(3)
Creators: name: Strouthos, Costas
name: Kogut, John B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Non-compact three-dimensional QED is studied by computer simulations to understand its chiral symmetry breaking features for different values of the number of fermion flavors N_f. We consider the four-component formulation for the fermion fields, which arises naturally as the continuum limit of the staggered fermion construction in (2+1) dimensions. We present preliminary results for the equation of state of the theory in an effort to understand the properties of the chiral phase transition of the theory at a critical number of fermion flavors N_{fc}. Our preliminary results indicate that N_{fc}~1.5.
description: 7 pages, Presented at the XXV International Symposium on Lattice Field Theory, Regensburg, Germany
Analysis of the spleen colony-forming ability and lympho-myeloid repopulating ability of adherent marrow
Creators: name: Henry, Elizabeth Anne
Publisher: name: University of British Columbia
Year: 2010

description: In an attempt to characterize different populations of primitive hemopoietic stem cells, the spleen colony forming and in vivo lympho-myeloid repopulating ability of bone marrow cells which adhere to plastic was assessed. The property of adherence was chosen for evaluation because it had previously been reported that adherent stem cells have greater self-renewal capacity than non-adherent stem cells (1). When adherent marrow was assessed for spleen colony-forming ability, it contained 2 to 3 fold fewer day 10 CFU-S than fresh marrow but a relatively increased myeloid repopulating ability. These results are consistent with evidence that high self-renewal stem cells form spleen colonies that do not become macroscopically visible until 12 to 14 days post-transplantation (2). The results also suggested that adherence did not enrich for stem cells with long-term T lymphoid repopulating ability, although this may have been generally compromised by minor histocompatibility differences between the donor and host strains used. These studies thus provide further evidence of heterogeneity amongst primitive pluripotent marrow progenitor cells. Adherence separation appears to enrich for a sub-population that does not form spleen colonies within 10 days, but has superior myeloid repopulating potential.
NLO QCD corrections to pp->WW+jet+X
Creators: name: Dittmaier, Stefan
name: Kallweit, Stefan
name: Uwer, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on a calculation of the next-to-leading order QCD corrections to the production of W-boson pairs in association with a hard jet at hadron colliders, which is an important source of background for Higgs and new-physics searches at the LHC. If a veto against the emission of a second hard jet is applied, the corrections stabilize the leading-order prediction for the cross section considerably.
description: 6 pages, latex, 5 figures, 7 eps-files, to appear in the proceedings of 9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory, Sondershausen, Germany, 20-25 Apr 2008
Deep learning for prediction of complex geology ahead of drilling
Creators: name: Fossum, Kristian
name: Alyaev, Sergey
name: Tveranger, Jan
name: Elsheikh, Ahmed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: During a geosteering operation the well path is intentionally adjusted in response to the new data acquired while drilling. To achieve consistent high-quality decisions, especially when drilling in complex environments, decision support systems can help cope with high volumes of data and interpretation complexities. They can assimilate the real-time measurements into a probabilistic earth model and use the updated model for decision recommendations. Recently, machine learning (ML) techniques have enabled a wide range of methods that redistribute computational cost from on-line to off-line calculations. In this paper, we introduce two ML techniques into the geosteering decision support framework. Firstly, a complex earth model representation is generated using a Generative Adversarial Network (GAN). Secondly, a commercial extra-deep electromagnetic simulator is represented using a Forward Deep Neural Network (FDNN). The numerical experiments demonstrate that the combination of the GAN and the FDNN in an ensemble randomized maximum likelihood data assimilation scheme provides real-time estimates of complex geological uncertainty. This yields reduction of geological uncertainty ahead of the drill-bit from the measurements gathered behind and around the well bore.
description: Accepted to ICCS 2021
Angelika Ebbinghaus (Hrsg.), Die letzte Chance? 1968 in Osteuropa. Analysen und Berichte über ein Schlüsseljahr
Creators: name: Brier, Robert
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2011

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 60 Nr. 3 (2011)
Modeling the black holes surrounded by a dark matter halo in the galactic center of M87
Creators: name: Liu, Dong
name: Yang, Yi
name: Xu, Zhaoyi
name: Long, Zheng-Wen
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, the structure of a dark matter halo can be well described by the mass model of M87 and the Einasto profile for the cold dark matter model, i.e., $ρ_{\text{eina}} (r)=ρ_\text{e} \exp ( -2 α^{-1} ((r/r_\text{e})^α-1 ) )$ (Wang et al. in Nature 585:39-42, 2020). Under these conditions, we construct a solution of a static spherically symmetric black hole in a dark matter halo. Then, using the Newman-janis algorithm, we extend this static solution to the case of rotation, and obtain a solution for the Kerr-like black hole. We prove that this solution of the Kerr-like black hole is indeed a solution to the Einstein field equations. Finally, taking M87 as an example, we study and analyze some physical properties of this Kerr-like black hole, and then compare them with the Kerr black hole. Particularly, from the perspective of the black hole shadow and the fact that the Kerr-like black hole and the Kerr black hole is distinguishable, we give the upper limit of the shape parameter of the Einasto density profile, that is approximately $α<0.22$, which may provide a new method to further improve and perfect the density profile of dark matter model. These research results for the black hole in a dark matter halo may indirectly provide an effective method for detecting the existence of dark matter.
Racah Algebra $R(n)$ from Coalgebraic Structures and Chains of $R(3)$ Substructures
Creators: name: Latini, Danilo
name: Marquette, Ian
name: Zhang, Yao-Zhong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The recent interest in the study of higher-rank polynomial algebras related to $n$-dimensional classical and quantum superintegrable systems with coalgebra symmetry and their connection with the generalised Racah algebra $R(n)$, a higher-rank generalisation of the rank one Racah algebra $R(3)$, raises the problem of understanding the role played by the $n - 2$ quadratic subalgebras generated by the left and right Casimir invariants (sometimes referred as universal quadratic substructures) from this new perspective. Such subalgebra structures play a signficant role in the algebraic derivation of spectrum of quantum superintegrable systems. In this work, we tackle this problem and show that the above quadratic subalgebra structures can be understood, at a fixed $n > 3$, as the images of $n - 2$ injective morphisms of $R(3)$ into $R(n)$. We show that each of the $n-2$ quadratic subalgebras is isomorphic to the rank one Racah algebra $R(3)$. As a byproduct, we also obtain an equivalent presentation for the universal quadratic subtructures generated by the partial Casimir invariants of the coalgebra. The construction, which relies on explicit (symplectic or differential) realisations of the generators, is performed in both the classical and the quantum cases.
Prospects for probing gravitational waves from primordial black hole binaries
Creators: name: Pujolas, Oriol
name: Vaskonen, Ville
name: Veermäe, Hardi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the prospects of future gravitational wave (GW) detectors in probing primordial black hole (PBH) binaries. We show that across a broad mass range from $10^{-5}M_\odot$ to $10^7M_\odot$, future GW interferometers provide a potential probe of the PBH abundance that is more sensitive than any currently existing experiment. In particular, we find that galactic PBH binaries with masses as low as $10^{-5}M_\odot$ may be probed with ET, AEDGE and LISA by searching for nearly monochromatic continuous GW signals. Such searches could independently test the PBH interpretation of the ultrashort microlensing events observed by OGLE. We also consider the possibility of observing GWs from asteroid mass PBH binaries through graviton-photon conversion.
description: 9 pages, 3 figures. published version
Lenka Adámková, „…schrecklich fremd, dennoch anziehend“ (Škvorecký). Zum Bild des Rotarmisten in ausgewählten Texten der tschechischen und (ost)deutschen Literatur nach 1945
Creators: name: Kałużna, Magdalena
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 1 (2012)
Injection locking and synchronization in Josephson photonics devices
Creators: name: Danner, Lukas
name: Padurariu, Ciprian
name: Ankerhold, Joachim
name: Kubala, Björn
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Injection locking can stabilize a source of radiation, leading to an efficient suppression of noise-induced spectral broadening and therefore, to a narrow spectrum. The technique is well established in laser physics, where a phenomenological description due to Adler is usually sufficient. Recently, locking experiments were performed in Josephson photonics devices, where microwave radiation is created by inelastic Cooper pair tunneling across a dc-biased Josephson junction connected in-series with a microwave resonator. An in-depth theory of locking for such devices, accounting for the Josephson non-linearity and the specific engineered environments, is lacking. Here, we study injection locking in a typical Josephson photonics device where the environment consists of a single mode cavity, operated in the classical regime. We show that an in-series resistance, however small, is an important ingredient in describing self-sustained Josephson oscillations and enables the locking region. We derive a dynamical equation describing locking, similar to an Adler equation, from the specific circuit equations. The effect of noise on the locked Josephson phase is described in terms of phase slips in a modified washboard potential. For weak noise, the spectral broadening is reduced exponentially with the injection signal. When this signal is provided from a second Josephson device, the two devices synchronize. In the linearized limit, we recover the Kuramoto model of synchronized oscillators. The picture of classical phase slips established here suggests a natural extension towards a theory of locking in the quantum regime.
description: 18 pages, 8 figures
Nonlinearly driven Landau-Zener transition with telegraph noise
Creators: name: Vestgarden, J. I.
name: Bergli, J.
name: Galperin, Y. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study Landau-Zener like dynamics of a qubit influenced by transverse random telegraph noise. The telegraph noise is characterized by its coupling strength, $v$ and switching rate, $γ$. The qubit energy levels are driven nonlinearly in time, $\propto \sign(t)|t|^ν$, and we derive the transition probability in the limit of sufficiently fast noise, for arbitrary exponent $ν$. The longitudinal coherence after transition depends strongly on $ν$, and there exists a critical $ν_c$ with qualitative difference between $ν< ν_c$ and $ν> ν_c$. When $νν_c$ the system keeps some coherence depending on the strength of the noise, and in the limit of weak noise no transition takes place. For fast noise $ν_c=1/2$, while for slow noise $ν_c<1/2$ and it depends on $γ$. We also discuss transverse coherence, which is relevant when the qubit has a nonzero minimum energy gap. The qualitative dependency on $ν$ is the same for transverse as for longitudinal coherence. The state after transition does in general depend on $γ$. For fixed $v$, increasing $γ$ decreases the final state coherence when $ν<1$ and increase the final state coherence when $ν>1$. Only the conventional linear driving is independent of $γ$.
description: 7 pages, 5 figures
Thermodynamics of Einstein-Born-Infeld black holes in three dimensions
Creators: name: Myung, Yun Soo
name: Kim, Yong-Wan
name: Park, Young-Jai
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that all thermodynamic quantities of the Einstein-Born-Infeld black holes in three dimensions can be obtained from the dilaton and its potential of two dimensional dilaton gravity through the dimensional reduction. These are all between non-rotating uncharged BTZ black hole (NBTZ) and charged BTZ black hole (CBTZ).
description: 17 pages, 2 figures, version to appear in PRD
A study of CNN capacity applied to Left Venticle Segmentation in Cardiac MRI
Creators: name: Toledo, Marcelo
name: Lima, Daniel
name: Krieger, José
name: Gutierrez, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.2.6; I.5.1; J.3
subject: 68T07, 92B20

description: CNN (Convolutional Neural Network) models have been successfully used for segmentation of the left ventricle (LV) in cardiac MRI (Magnetic Resonance Imaging), providing clinical measurements. In practice, two questions arise with deployment of CNNs: 1) when is it better to use a shallow model instead of a deeper one? 2) how the size of a dataset might change the network performance? We propose a framework to answer them, by experimenting with deep and shallow versions of three U-Net families, trained from scratch in six subsets varying from 100 to 10,000 images, different network sizes, learning rates and regularization values. 1620 models were evaluated using 5-fold cross-validation by loss and DICE. The results indicate that: sample size affects performance more than architecture or hyper-parameters; in small samples the performance is more sensitive to hyper-parameters than architecture; the performance difference between shallow and deeper networks is not the same across families.
Robert Traba, The Past in the Present. The Construction of Polish History
Creators: name: Stokłosa, Katarzyna
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2016

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 65 Nr. 1 (2016): Samizdat and Alternative Ways of Communications
Additional file 1 of Normative values for the hypoparathyroidism patient questionnaire (HPQ28) in the German general population
Creators: name: Trummer, Christian
name: Blaschke, Martina
name: Quint, Deborah
name: Schulz, Maxi
name: Herrmann-Lingen, Christoph
name: Büttner, Matthias
name: Siggelkow, Heide
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Science Policy
subject: Mental Health

description: Supplementary Material 1
Adiabatic Cooper pair splitter
Creators: name: Brange, Fredrik
name: Baruah, Riya
name: Flindt, Christian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent experiments have observed Cooper pair splitting in quantum dots coupled to superconductors, and efficient schemes for controlling and timing the splitting process are now called for. Here, we propose and analyze an adiabatic Cooper pair splitter that can produce a regular flow of spin-entangled electrons in response to a time-dependent and periodic gate voltage. The splitting process is controlled by moving adiabatically back and forth along an avoided crossing between the empty state and the singlet state of two quantum dots that are coupled to a superconductor, followed by the emission of the split Cooper pairs into two normal-state drains. The scheme does not rely on fine-tuned resonance conditions and is therefore robust against experimental imperfections in the driving signal. We identify a range of driving frequencies, where the output currents are quantized and proportional to the driving frequency combined with suppressed low-frequency noise. We also discuss the main sources of cycle-missing events and evaluate the statistics of electrons emitted within a period of the drive as well as the distribution of waiting times between them. Realistic parameter estimates indicate that the Cooper pair splitter can be operated in the gigahertz regime.
description: 6+2 pages, 4 figures
Johannes Hoffmann (Hrsg.), Stereotypen, Vorurteile, Völkerbilder in Ost und West in Wissenschaft und Unterricht. Eine Bibliographie. Teil 3
Creators: name: Weger, Tobias
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
D* K molecular structure of the Ds1(2460) meson
Creators: name: Faessler, Amand
name: Gutsche, Thomas
name: Lyubovitskij, Valery E.
name: Ma, Yong-Liang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a possible interpretation of the Ds1(2460) meson as a hadronic molecule - a bound state of D* and K mesons. Using a phenomenological Lagrangian approach we determine the strong Ds1 to Ds* pi0 and radiative Ds1 to Ds gamma decays. In order of magnitude our results for the partial strong and radiative decay widths are consistent with previous calculations.
description: 11 pages, 3 figures
Noncommutative Supertori in Two Dimensions
Creators: name: Chang-Young, Ee
name: Kim, Hoil
name: Nakajima, Hiroaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: First we consider the deformations of superspaces with N=(1,1) and N=(2,2) supersymmetries in two dimensions. Among these the construction of noncommutative supertorus with odd spin structure is possible only in the case of N=(2,2) supersymmetry broken down to N=(1,1). However, for the even spin structures the construction of noncommutative supertorus is possible for both N=(1,1) and N=(2,2) cases. The spin structures are realized by implementing the translational properties along the cycles of commutative supertorus in the operator version: Odd spin structure is realized by the translation in the fermionic direction in the same manner as in the construction of noncommutative torus, and even spin structures are realized with appropriate versions of the spin angular momentum operator.
description: LaTeX 17 pages
Anne-Christin Saß, Berliner Luftmenschen. Osteuropäisch-jüdische Migranten in der Weimarer Republik
Creators: name: Ritter, Rüdiger
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 2 (2014)
Łukasz Kamiński u.a. (Hrsg.), Handbuch der kommunistischen Geheimdienste in Osteuropa 1944-1991
Creators: name: Foitzik, Jan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2011

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 60 Nr. 3 (2011)
Gravitational waves from the Big Bounce
Creators: name: Mielczarek, Jakub
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we investigate gravitational waves production during the Big Bounce phase inspired by the Loop Quantum Cosmology. We consider the influence of the holonomy corrections to the equation for tensor modes. We show that they act like additional effective graviton mass, suppressing gravitational waves creation. However, this effects can be treated perturbatively. We investigate the simplified model without these corrections and find its exact analytical solution. For this model we calculate a spectrum of the gravitational waves from the Big Bounce phase. The obtained spectrum decreases to zero for the low energy modes. Based on this observation we indicate that this effect can lead to the low CMB multipoles suppression and gives a potential way to test Loop Quantum Cosmology models. We also consider a scenario with a post-bounce inflationary phase. The obtained power spectrum gives qualitative explanation of the CMB spectra, including low multipoles suppression. This result is a challenge to construct a consistent bounce+inflation model in the Loop Quantum Cosmology.
description: 19 pages, 9 figures
Franz Schön, Dietrich Scholze (Hrsg.), Sorbisches Kulturlexikon
Creators: name: Vogt, Till
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2016

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 65 Nr. 1 (2016): Samizdat and Alternative Ways of Communications