cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hermann A.G. Brijder, Nemrud Dağı. Recent Archaeological Research and Conservation Activities in the Tomb Sanctuary on Mount Nemrud
Creators: name: Messerschmidt, Wolfgang
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Hermann A.G. Brijder, Nemrud Dağı. Recent Archaeological Research and Conservation Activities in the Tomb Sanctuary on Mount Nemrud. Berlin/Boston: De Gruyter 2014, X + 686 S., 316 Abb., 32 Taf. mit 136 s/w-Zeichnungen
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
John Ma, Statues and Cities. Honorific Portraits and Civic Identity in the Hellenistic World
Creators: name: Herbin, Frédéric
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: John Ma, Statues and Cities. Honorific Portraits and Civic Identity in the Hellenistic World. Oxford: Oxford University Press 2013, 406 S., 73 Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Richard T. Neer, Kunst und Archäologie der griechischen Welt. Von den Anfängen bis zum Hellenismus
Creators: name: Dorka Moreno, Martin
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Richard T. Neer, Kunst und Archäologie der griechischen Welt. Von den Anfängen bis zum Hellenismus. Darmstadt: Wissenschaftliche Buchgesellschaft 2013, 400 S., 432 farb. Abb., 116 s/w-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Additional file 4 of Integrative analysis of TP53 mutations in lung adenocarcinoma for immunotherapies and prognosis
Creators: name: Li, He
name: Yang, Lei
name: Wang, Yuanyuan
name: Wang, Lingchan
name: Chen, Gang
name: Zhang, Li
name: Wang, Dongchang
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4. SF3. Immune infiltration results of ESITMATE, xCell, EPIC, TIMER, CIBERSORTx, MCPcounter, quanTIseq, and IPS. The columns in the heatmap represent samples; yellow represents TP53 MUT samples, and green represents TP53 ET samples. The rows represent different cells in each immune infiltration analysis, and the content between the parentheses indicates the significance of the difference in immune infiltration between the TP53 MUT and TP53 WT groups (*: p <= 0.05; **: p <= 0.01; ***: p <= 0.001; ****: p <= 0.0001). The heatmap matrix depicts the immune infiltration levels derived from various techniques. In ESTIMATE, red represents high immune infiltration levels, whereas blue represents low immune infiltration levels. In xCell, yellow represents high immune infiltration levels, whereas dark purple represents low immune infiltration levels. In EPIC, red represents high immune infiltration levels, whereas blue represents low immune infiltration levels. In TIMER, light green represents high immune infiltration levels, whereas dark green represents low immune infiltration levels. In CIBERSORTx, light red represents high immune infiltration levels whereas dark red represents low immune infiltration levels. In MCPcounter, yellow represents high immune infiltration levels, whereas deep purple represents low immune infiltration levels. In quanTIseq, yellow represents high immune infiltration levels, whereas dark blue represents low immune infiltration levels. In IPS, yellow represents high immune infiltration levels, whereas darkred represents low immune infiltration levels.
A Probabilistic Forecast-Driven Strategy for a Risk-Aware Participation in the Capacity Firming Market: extended version
Creators: name: Dumas, Jonathan
name: Cointe, Colin
name: Wehenkel, Antoine
name: Sutera, Antonio
name: Fettweis, Xavier
name: Cornélusse, Bertrand
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper addresses the energy management of a grid-connected renewable generation plant coupled with a battery energy storage device in the capacity firming market, designed to promote renewable power generation facilities in small non-interconnected grids. The core contribution is to propose a probabilistic forecast-driven strategy, modeled as a min-max-min robust optimization problem with recourse. It is solved using a Benders-dual cutting plane algorithm and a column and constraints generation algorithm in a tractable manner. A dynamic risk-averse parameters selection strategy based on the quantile forecasts distribution is proposed to improve the results. A secondary contribution is to use a recently developed deep learning model known as normalizing flows to generate quantile forecasts of renewable generation for the robust optimization problem. This technique provides a general mechanism for defining expressive probability distributions, only requiring the specification of a base distribution and a series of bijective transformations. Overall, the robust approach improves the results over a deterministic approach with nominal point forecasts by finding a trade-off between conservative and risk-seeking policies. The case study uses the photovoltaic generation monitored on-site at the University of Liège (ULiège), Belgium.
description: Extended version of the paper accepted for publication in IEEE Transactions on Sustainable Energy
Moving Pearl vortices in thin-film superconductors
Creators: name: Kogan, V. G.
name: Nakagawa, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The magnetic field $h_z$ of a moving Pearl vortex in a superconducting thin-film in $(x,y)$ plane is studied with the help of time-dependent London equation. It is found that for a vortex at the origin moving in $+x$ direction, $h_z(x,y)$ is suppressed in front of the vortex, $x>0$, and enhanced behind ($x<0$). The distribution asymmetry is proportional to the velocity and to the conductivity of normal quasiparticles. The vortex self-energy and the interaction of two moving vortices are evaluated.
description: 6 pages, 4 figures. arXiv admin note: text overlap with arXiv:2004.03663
A vanishing theorem for sheaves of small differential operators in positive characteristic
Creators: name: Samokhin, Alexander
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14F05, 13A35

description: Let $X$ be a smooth variety over an algebraically closed field $k$ of positive characteristic, ${\rm D}_X$ the sheaf of PD-differential operators, and ${\bar D}_X$ its central reduction, the sheaf of small differential operators. In this paper we show that if $X$ is a line-hyperplane incidence variety (a partial flag variety of type $(1,n,n+1)$) or a quadric of arbitrary dimension (in this case the characteristic is supposed to be odd) then ${\rm H}^{i}(X,{\bar D}_X)=0$ for $i>0$. Using this vanishing result and the derived localization theorem for crystalline differential operators (\cite{BMR}) we show that the Frobenius pushforward of the structure sheaf is a tilting bundle on these varieties, provided that $p>h$, the Coxeter number of the corresponding group.
description: Revised version. A vanishing statement added allowing to remove previous restrictions on the characteristic in the case of quadrics. 15 pages
Non-equilibrium phase separation in mixtures of catalytically active particles: size dispersity and screening effects
Creators: name: Ouazan-Reboul, Vincent
name: Agudo-Canalejo, Jaime
name: Golestanian, Ramin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Biomolecular condensates in cells are often rich in catalytically-active enzymes. This is particularly true in the case of the large enzymatic complexes known as metabolons, which contain different enzymes that participate in the same catalytic pathway. One possible explanation for this self-organization is the combination of the catalytic activity of the enzymes and a chemotactic response to gradients of their substrate, which leads to a substrate-mediated effective interaction between enzymes. These interactions constitute a purely non-equilibrium effect and show exotic features such as non-reciprocity. Here, we analytically study a model describing the phase separation of a mixture of such catalytically-active particles. We show that a Michaelis-Menten-like dependence of the particles' activities manifests itself as a screening of the interactions, and that a mixture of two differently-sized active species can exhibit phase separation with transient oscillations. We also derive a rich stability phase diagram for a mixture of two species with both concentration-dependent activity and size dispersity. This work highlights the variety of possible phase separation behaviours in mixtures of chemically-active particles, which provides an alternative pathway to the passive interactions more commonly associated with phase separation in cells. Our results highlight non-equilibrium organizing principles that can be important for biologically relevant liquid-liquid phase separation.
6D thick branes from interacting scalar fields
Creators: name: Dzhunushaliev, Vladimir
name: Folomeev, Vladimir
name: Singleton, Douglas
name: Aguilar-Rudametkin, Sergio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A thick brane in six dimensions is constructed using two scalar fields. The field equations for 6D gravity plus the scalar fields are solved numerically. This thick brane solution shares some features with a previously studied analytic solutions, but has the advantage that the energy-momentum tensor which forms the thick brane comes from the scalar fields rather than being put in by hand. Additionally the scalar fields which form the brane also provide a universal, non-gravitational trapping mechanism for test fields of various spins.
description: final version
Rapid model comparison of equations of state from gravitational wave observation of binary neutron star coalescences
Creators: name: Ghosh, Shaon
name: Liu, Xiaoshu
name: Creighton, Jolien
name: Kastaun, Wolfgang
name: Pratten, Geraint
name: Hernandez, Ignacio Magana
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The discovery of the coalescence of binary neutron star GW170817 was a watershed moment in the field of gravitational wave astronomy. Among the rich variety of information that we were able to uncover from this discovery was the first non-electromagnetic measurement of the neutron star radius, and the cold nuclear equation of state. It also led to a large equation of state model-selection study from gravitational-wave data. In those studies Bayesian nested sampling runs were conducted for each candidate equation of state model to compute their evidence in the gravitational-wave data. Such studies, though invaluable, are computationally expensive and require repeated, redundant, computation for any new models. We present a novel technique to conduct model-selection of equation of state in an extremely rapid fashion (~minutes) on any arbitrary model. We test this technique against the results of a nested-sampling model-selection technique published earlier by the LIGO/Virgo collaboration, and show that the results are in good agreement with a median fractional error in Bayes factor of about 10%, where we assume that the true Bayes factor is calculated in the aforementioned nested sampling runs. We found that the highest fractional error occurs for equation of state models that have very little support in the posterior distribution, thus resulting in large statistical uncertainty. We then used this method to combine multiple binary neutron star mergers to compute a joint-Bayes factor between equation of state models. This is achieved by stacking the evidence of the individual events and computing the Bayes factor from these stacked evidences for each pairs of equation of state.
description: Dataset produced in this study https://zenodo.org/record/4679013#.YHuUnJNKhsA
Joan Goodnick Westenholz – Yossi Maurey– Edwin Seroussi (Hgg.), Music in Antiquity. The Near East and the Mediterranean
Creators: name: Eichmann, Ricardo
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Joan Goodnick Westenholz – Yossi Maurey– Edwin Seroussi (Hgg.), Music in Antiquity. The Near East and the Mediterranean. Yuval, Studies of the Jewish Music Research Center Bd. 8. Berlin/Boston: De Gruyter 2014. XI + 375 S., Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Which contributions count? Analysis of attribution in open source
Creators: name: Young, Jean-Gabriel
name: Casari, Amanda
name: McLaughlin, Katie
name: Trujillo, Milo Z.
name: Hébert-Dufresne, Laurent
name: Bagrow, James P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Open source software projects usually acknowledge contributions with text files, websites, and other idiosyncratic methods. These data sources are hard to mine, which is why contributorship is most frequently measured through changes to repositories, such as commits, pushes, or patches. Recently, some open source projects have taken to recording contributor actions with standardized systems; this opens up a unique opportunity to understand how community-generated notions of contributorship map onto codebases as the measure of contribution. Here, we characterize contributor acknowledgment models in open source by analyzing thousands of projects that use a model called All Contributors to acknowledge diverse contributions like outreach, finance, infrastructure, and community management. We analyze the life cycle of projects through this model's lens and contrast its representation of contributorship with the picture given by other methods of acknowledgment, including GitHub's top committers indicator and contributions derived from actions taken on the platform. We find that community-generated systems of contribution acknowledgment make work like idea generation or bug finding more visible, which generates a more extensive picture of collaboration. Further, we find that models requiring explicit attribution lead to more clearly defined boundaries around what is and what is not a contribution.
description: Extended version of a paper accepted at MSR 2021
The tails in the Helix Nebula NGC 7293
Creators: name: Dyson, J. E.
name: Pittard, J. M.
name: Meaburn, J.
name: Falle, S. A. E. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have examined a stream-source model for the production of the cometary tails observed in the Helix Nebula NGC 7293 in which a transonic or moderately supersonic stream of ionized gas overruns a source of ionized gas. Hydrodynamic calculations reveal velocity structures which are in good agreement with the observational data on tail velocities and are consistent with observations of the nebular structure. The results also are indicative of a stellar atmosphere origin for the cometary globules. Tail remnants persist for timescales long enough for their identification with faint striations visible in the nebula gas to be plausible.
description: 7 pages, 6 figures, accepted for publication in A&A
The institutional impediments to state - sponsored community development in Canada's north : the case of the Northwest Territories Housing Corporation
Creators: name: McMillan, Ross J.
Publisher: name: University of British Columbia
Year: 2010

description: This study identifies and describes three institutional impediments to state-sponsored community development in Canada's North. Community development is defined as both the process and product of purposive social action aimed at community empowerment. The central premise of the study is that community development initiatives offer promise for overcoming the pernicious effects of colonialism in the North. Dominant modes of northern economic and political development are described and are shown to have resulted in few lasting benefits for northern communities and to have contributed to a pervasive alienation and sense of powerlessness. Recent theory on community development and the state is used to demonstrate that state agencies can be expected to adopt community development objectives in response to conflict or community demands — not out of the benevolence of liberal policy makers. Similarly, the study argues that if community demands for empowerment wane, institutional impediments may undermine state-sponsored community development initiatives. Impediments to state-sponsored community development are illustrated through a case study of community development in the North. The study examines the factors which led to the adoption of a community development mandate by an agency of the territorial government — the Northwest Territories Housing Corporation — and it describes the forces which ultimately undermined its community development efforts. Three institutional impediments to state-sponsored community development in Canada's North are identified and described: government-imposed limitations on the independent actions of territorial agencies; shifting political priorities which stem, in part, from the unique form of electoral politics in the Northwest Territories; and intransigence and personnel changes within the bureaucracy. The principal implication of the findings is that practitioners and theorists alike must recognize that community development is an activity concerned with power and politics. In accordance with this recognition, community interests must not expect the state to adopt meaningful community development objectives unless it is in response to effective community demands, and must anticipate that institutional impediments may appear and undermine such efforts if these demands subside. These realizations must inform strategies for community empowerment before the promise of community development can be met in Canada's North.
Image Ellipticity from Atmospheric Aberrations
Creators: name: de Vries, W. H.
name: Olivier, S. S.
name: Asztalos, S. J.
name: Rosenberg, L. J.
name: Baker, K. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the ellipticity of the point-spread function (PSF) produced by imaging an unresolved source with a telescope, subject to the effects of atmospheric turbulence. It is important to quantify these effects in order to understand the errors in shape measurements of astronomical objects, such as those used to study weak gravitational lensing of field galaxies. The PSF modeling involves either a Fourier transform of the phase information in the pupil plane or a ray-tracing approach, which has the advantage of requiring fewer computations than the Fourier transform. Using a standard method, involving the Gaussian weighted second moments of intensity, we then calculate the ellipticity of the PSF patterns. We find significant ellipticity for the instantaneous patterns (up to more than 10%). Longer exposures, which we approximate by combining multiple (N) images from uncorrelated atmospheric realizations, yield progressively lower ellipticity (as 1 / sqrt(N)). We also verify that the measured ellipticity does not depend on the sampling interval in the pupil plane using the Fourier method. However, we find that the results using the ray-tracing technique do depend on the pupil sampling interval, representing a gradual breakdown of the geometric approximation at high spatial frequencies. Therefore, ray tracing is generally not an accurate method of modeling PSF ellipticity induced by atmospheric turbulence unless some additional procedure is implemented to correctly account for the effects of high spatial frequency aberrations. The Fourier method, however, can be used directly to accurately model PSF ellipticity, which can give insights into errors in the statistics of field galaxy shapes used in studies of weak gravitational lensing.
description: 9 pages, 5 color figures (some reduced in size). Accepted for publication in the Astrophysical Journal
Christoph Eger, Spätantikes Kleidungszubehör aus Nordafrika I. Trägerkreis, Mobilität und Ethnos im Spiegel der Funde der spätesten römischen Kaiserzeit und der vandalischen Zeit
Creators: name: Otten, Thomas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Christoph Eger, Spätantikes Kleidungszubehör aus Nordafrika I. Trägerkreis, Mobilität und Ethnos im Spiegel der Funde der spätesten römischen Kaiserzeit und der vandalischen Zeit. Münchner Beitr. Prov.-Röm. Arch. Bd. 5, hg. v. M. Mackensen. Wiesbaden: Reichert Verlag 2012, 456 S., 41 s/w-Abb., 9 farb. Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Water Production Rate of C/2020 F3 (NEOWISE) from SOHO/SWAN over Its Active Apparition
Creators: name: Combi, M. R.
name: Mäkinen, T.
name: Bertaux, J. -L.
name: Quémerais, E.
name: Ferron, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: C/2020 F3 (NEOWISE) was discovered in images from the Near Earth Object program of the Wide-Field Infrared Survey Explorer (NEOWISE) taken on 27 March 2020 and has become the Great Comet of 2020. The Solar Wind ANisotropies (SWAN) camera on the Solar and Heliospheric Observatory (SOHO) spacecraft, located in a halo orbit around the Earth-Sun L1 Lagrange point, makes daily full-sky images of hydrogen Lyman-alpha. Water production rates were determined from the SWAN hydrogen Lyman-alpha brightness and spatial distribution of the comet measured over a 4-month period of time on either side of the comet's perihelion on 3 July 2020. The water production rate in s^-1 was moderately asymmetric around perihelion and varied with the heliocentric distance, r, in au as (6.9+/-0.5) x 10^28 r^-2.5+/-0.2 and (10.1+/-0.5) x 10^28 r^-3.5+/-0.1 before and after perihelion, respectively. This is consistent with the comet having been through the planetary region of the solar system on one or more previous apparitions. A water production rates as large as 5.27 x 10^30 s^-1 were determined shortly after perihelion, once the comet was outside the solar avoidance area of SWAN, when the comet was 0.324 au from the Sun.
description: 16 Pages, 4 Figures, 1 Table
Conformal quaternionic contact curvature and the local sphere theorem
Creators: name: Ivanov, Stefan
name: Vassilev, Dimiter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: A tensor invariant is defined on a quaternionic contact manifold in terms of the curvature and torsion of the Biquard connection involving derivatives up to third order of the contact form. This tensor, called quaternionic contact conformal curvature, is similar to the Weyl conformal curvature in Riemannian geometry and to the Chern-Moser tensor in CR geometry. It is shown that a quaternionic contact manifold is locally quaternionic contact conformal to the standard flat quaternionic contact structure on the quaternionic Heisenberg group, or equivalently, to the standard 3-sasakian structure on the sphere iff the quaternionic contact conformal curvature vanishes.
description: LaTeX, 33 pages, exposition clarified, final version, to appear in J.Math.Pures Appl
François Baratte, Die Römer in Tunesien und Libyen. Nordafrika in römischer Zeit
Creators: name: Rummel, Philipp Von
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: François Baratte, Die Römer in Tunesien und Libyen. Nordafrika in römischer Zeit. Sonderbände der Antiken Welt. Mainz: Verlag Philipp von Zabern 2012, 144 S., 141 Farb-, 3 s/w-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Studying High $p_T$ Muons in Cosmic-Ray Air Showers
Creators: name: Klein, Spencer R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Most cosmic-ray air shower arrays have focused on detecting electromagnetic shower particles and low energy muons. A few groups (most notably MACRO + EASTOP and SPASE + AMANDA) have studied the high energy muon component of showers. However, these experiments had small solid angles, and did not study muons far from the core. The IceTop + IceCube combination, with its 1 km$^2$ muon detection area can study muons far from the shower core. IceCube can measure their energy loss ($dE/dx$), and hence their energy. With the energy, and the known distribution of production heights, the transverse momentum ($p_T$) spectrum of high $p_T$ muons can be determined. The production of these muons is calculable in perturbative QCD, so the measured muon spectra can be used to probe the composition of incident cosmic-rays.
description: 4 pages, presented at the XIV International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2006), WeiHai, China
Weak damping of propagating MHD kink waves in the quiescent corona
Creators: name: Morton, Richard J.
name: Tiwari, Ajay K.
name: Van Doorsselaere, Tom
name: McLaughlin, James A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Propagating transverse waves are thought to be a key transporter of Poynting flux throughout the Sun's atmosphere. Recent studies have shown that these transverse motions, interpreted as the magnetohydrodynamic kink mode, are prevalent throughout the corona. The associated energy estimates suggest the waves carry enough energy to meet the demands of the coronal radiative losses in the quiescent Sun. However, it is still unclear how the waves deposit their energy into the coronal plasma. We present the results from a large-scale study of propagating kink waves in the quiescent corona using data from the Coronal Multi-channel Polarimeter (CoMP). The analysis reveals that the kink waves appear to be weakly damped, which would imply low rates of energy transfer from the large-scale transverse motions to smaller-scales via either uni-turbulence or resonant absorption. This raises questions about how the observed kink modes would deposit their energy into the coronal plasma. Moreover, these observations, combined with the results of Monte Carlo simulations, lead us to infer that the solar corona displays a spectrum of density ratios, with a smaller density ratio (relative to the ambient corona) in quiescent coronal loops and a higher density ratio in active region coronal loops.
description: 11 pages, 3 figures, Submitted
Ernst Vogt, Literatur der Antike und Philologie der Neuzeit. Ausgewählte Schriften
Creators: name: Dräger, Paul
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Ernst Vogt, Literatur der Antike und Philologie der Neuzeit. Ausgewählte Schriften. Herausgegeben von Erich Lamberz. Beiträge zur Altertumskunde Bd. 313. Berlin/Boston: De Gruyter 2013. XI + 616 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Canted Ferromagnetism in Double Exchange Model with on-site Coulomb Repulsion
Creators: name: Karchev, Naoum
name: Michev, Vasil
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The double exchange model with on-site Coulomb repulsion is considered. Schwinger-bosons representation of the localized spins is used and two spin-singlet Fermion operators are introduced. In terms of the new Fermi fields the on-site Hund's interaction is in a diagonal form and the true magnons of the system are identified. The singlet fermions can be understood as electrons dressed by a cloud of repeatedly emitted and reabsorbed magnons. Rewritten in terms of Schwinger-bosons and spin-singlet fermions the theory is U(1) gauge invariant. We show that spontaneous breakdown of the gauge symmetry leads to \emph{\textbf{canted ferromagnetism with on-site spins of localized and delocalized electrons misaligned}}. On-site canted phase emerges in double exchange model when Coulomb repulsion is large enough. The quantum phase transition between ferromagnetism and canted phase is studied varying the Coulomb repulsion for different values of parameters in the theory such as Hund's coupling and chemical potential.
description: 8 pages, 6 figures
Ulrich Schmitzer (Hg.), Enzyklopädie der Philologie. Themen und Methoden der Klassischen Philologie heute
Creators: name: Frisch, Magnus
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Ulrich Schmitzer (Hg.), Enzyklopädie der Philologie. Themen und Methoden der Klassischen Philologie heute. Vertumnus. Berliner Beiträge zur Klassischen Philologie und zu ihren Nachbargebieten Bd. 11. Göttingen: Edition Ruprecht 2013, 314 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
^{63}Cu, ^{35}Cl, and ^{1}H NMR in the S=1/2 Kagomé Lattice ZnCu_{3}(OH)_{6}Cl_{2}
Creators: name: Imai, T.
name: Nytko, E. A.
name: Bartlett, B. M.
name: Shores, M. P.
name: Nocera, D. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: ZnCu$_{3}$(OH)$_{6}$Cl$_{2}$ ($S=1/2$) is a promising new candidate for an ideal Kagomé Heisenberg antiferromagnet, because there is no magnetic phase transition down to $\sim$50 mK. We investigated its local magnetic and lattice environments with NMR techniques. We demonstrate that the intrinsic local spin susceptibility {\it decreases} toward T=0, but that slow freezing of the lattice near $\sim$50 K, presumably associated with OH bonds, contributes to a large increase of local spin susceptibility and its distribution. Spin dynamics near T=0 obey a power-law behavior in high magnetic fields.
description: Phys. Rev. Lett. (in press)
Gian Biagio Conte, 'Ope ingenii'. Experiences of Textual Criticism
Creators: name: Lindermann, Jens-Olaf
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Gian Biagio Conte, 'Ope ingenii'. Experiences of Textual Criticism. Berlin/Boston: De Gruyter 2013, VIII + 112 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Noise Squeezing in a Nanomechanical Duffing Resonator
Creators: name: Almog, R.
name: Zaitsev, S.
name: Shtempluck, O.
name: Buks, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study mechanical amplification and noise squeezing in a nonlinear nanomechanical resonator driven by an intense pump near its dynamical bifurcation point, namely, the onset of Duffing bistability. Phase sensitive amplification is achieved by a homodyne detection scheme, where the displacement detector's output, which has correlated spectrum around the pump frequency, is down converted by mixing with a local oscillator operating at the pump frequency with an adjustable phase. The down converted signal at the mixer's output could be either amplified or deamplified, yielding noise squeezing, depending on the local oscillator phase.
description: 4 pages, 5 figures; changed figure appearance
Exact solutions of the pseudo-Coulomb potential plus ring-shaped potential in the D-dimensional Schrodinger equation by the Nikiforov-Uvarov method
Creators: name: Ikhdair, Sameer M.
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present analytically the exact energy bound-states solutions of the Schrodinger equation in D-dimensions for an alternative (often used) pseudo-Coulomb potential-plus- ring-shaped potential of the form $V(r)=-% \frac{a}{r}+\frac{b}{r^{2}}+\frac{β\cos ^{2}θ}{r^{2}\sin ^{2}θ}+c$ by means of the conventional Nikiforov-Uvarov method. We give a clear recipe of how to obtain an explicit solution to the radial and angular parts of the wave functions in terms of orthogonal polynomials. The total energy of the system is different from the pseudo-Coulomb potential because of the contribution of the angular part. The general results obtained in this work can be reduced to the standard forms given in literature.
description: 15 pages
CZ vs Beam Splitter: errors of entangled operations
Creators: name: Zinatullin, Eduard
name: Korolev, Sergei
name: Golubeva, Tatiana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the quantum teleportation in continuous variables as a test scheme, we compare two entangled transformations - mixing of signals on a beamsplitter and by the CZ operation. We evaluate these transformations in terms of the errors added to teleported oscillators. We have shown that the CZ operation leads to the lower error of teleportation. This error can be further reduced by choosing appropriate weight coefficients for the CZ transforms. We have compared the errors of the theoretical CZ scheme and its practical implementation in the optical design. Although the CZ optical scheme adds intrinsic noise to the overall transformation, it is nevertheless possible to specify the parameters which provides a gain in comparison with the traditional teleportation protocol.
description: 9 pages, 5 figures
Ratio of kaon and pion leptonic decay constants with $N_f = 2 + 1 + 1$ Wilson-clover twisted-mass fermions
Creators: name: Alexandrou, C.
name: Bacchio, S.
name: Bergner, G.
name: Dimopoulos, P.
name: Finkenrath, J.
name: Frezzotti, R.
name: Garofalo, M.
name: Kostrzewa, B.
name: Koutsou, G.
name: Labus, P.
name: Sanfilippo, F.
name: Simula, S.
name: Ueding, M.
name: Urbach, C.
name: Wenger, U.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a determination of the ratio of kaon and pion leptonic decay constants in isosymmetric QCD (isoQCD), $f_K / f_π$, making use of the gauge ensembles produced by the Extended Twisted Mass Collaboration (ETMC) with $N_f = 2 + 1 + 1$ flavors of Wilson-clover twisted-mass quarks, including configurations close to the physical point for all dynamical flavors. The simulations are carried out at three values of the lattice spacing ranging from $\sim 0.068$ to $\sim 0.092$ fm with linear lattice size up to $L \sim 5.5$~fm. The scale is set by the PDG value of the pion decay constant, $f_π^{isoQCD} = 130.4~(2)$ MeV, at the isoQCD pion point, $M_π^{isoQCD} = 135.0~(2)$ MeV, obtaining for the gradient-flow (GF) scales the values $w_0 = 0.17383~(63)$ fm, $\sqrt{t_0} = 0.14436~(61)$ fm and $t_0 / w_0 = 0.11969~(62)$ fm. The data are analyzed within the framework of SU(2) Chiral Perturbation Theory (ChPT) without resorting to the use of renormalized quark masses. At the isoQCD kaon point $M_K^{isoQCD} = 494.2~(4)$ MeV we get $(f_K / f_π)^{isoQCD} = 1.1995~(44)$, where the error includes both statistical and systematic uncertainties. Implications for the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $|V_{us}|$ and for the first-row CKM unitarity are discussed.
description: 68 pages, 14 figures, 12 tables. Version to appear in PRD
Onset of $J/ψ$ Melting in Quark-Gluon Fluid at RHIC
Creators: name: Gunji, T.
name: Hamagaki, H.
name: Hatsuda, T.
name: Hirano, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A strong $J/ψ$ suppression in central Au+Au collisions has been observed by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). We develop a hydro+$J/ψ$ model in which hot quark-gluon matter is described by the full (3+1)-dimensional relativistic hydrodynamics and $J/ψ$ is treated as an impurity traversing through the matter. The experimental $J/ψ$ suppression pattern in mid-rapidity is reproduced well by the sequential melting of $χ_{\rm c}$, $ψ'$, and $J/ψ$ in dynamically expanding fluid. The melting temperature of directly produced $J/ψ$ is well constrained by the participant-number dependence of the $J/ψ$ suppression and is found to be about $2.T_{\rm c}$ with $T_{\rm c}$ being the pseudo-critical temperature.
description: 5 pages, 5 figures, Submitted to Phys. Rev. C. (Rapid Communication)
On the hollow enclosed by convex sets
Creators: name: Lehel, Jenő
name: Tóth, Géza
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: For $n\leq d$, a family ${\cal F}=\{C_0,C_1,\ldots, C_n\}$ of compact convex sets in $R^d$ is called an $n$-critical family provided any $n$ members of ${\cal F}$ have a non-empty intersection, but $\bigcap_{i=0}^n C_i=\varnothing$. If $n=d$ then a lemma on the intersection of convex sets due to Klee implies that the $d+1$ members of the $d$-critical family enclose a `hollow' in $R^d$, a bounded connected component of $R^d\setminus\bigcup_{i=0}^n C_i.$ Here we prove that the closure of the convex hull of a hollow in $R^d$ is a $d$-simplex.
description: 7 pages. Identical to original version, just some new acknowledgements
Donagi-Markman cubic for Hitchin systems
Creators: name: Balduzzi, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: The Donagi-Markman cubic is the differential of the period map for algebraic completely integrable systems. Here we prove a formula for the cubic in the case of Hitchin's system for arbitrary $\mathfrak g$. This was originally stated (without proof) by Pantev for ${\mathfrak sl}_n$.
description: Final version, minor changes made at request of referee
Scalable creation of silicon-vacancy color centers in diamond by ion implantation through a 1-$μ$m pinhole
Creators: name: Hunold, L.
name: Lagomarsino, S.
name: Flatae, A. M.
name: Kambalathmana, H.
name: Sledz, F.
name: Sciortino, S.
name: Gelli, N.
name: Giuntini, L.
name: Agio, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The controlled creation of quantum emitters in diamond represents a major research effort in the fabrication of single-photon devices. Here, we present the scalable production of silicon-vacancy (SiV) color centers in single-crystal diamond by ion implantation. The lateral position of the SiV is spatially controlled by a 1-$μ$m pinhole placed in front of the sample, which can be moved nanometer precise using a piezo stage. The initial implantation position is controlled by monitoring the ion beam position with a camera. Hereby, silicon ions are implanted at the desired spots in an area comparable to the diffraction limit. We discuss the role of ions scattered by the pinhole and the activation yield of the SiV color centers for the creation of single quantum emitters.
description: 11 pages, 4 figures
Metallicities from high resolution spectra of 49 RR Lyrae Variables
Creators: name: Gilligan, Christina K.
name: Chaboyer, Brian
name: Marengo, Massimo
name: Mullen, Joseph P.
name: Bono, Giuseppe
name: Braga, Vittorio F.
name: Crestani, Juliana
name: Dall'Ora, Massimo
name: Fiorentino, Giuliana
name: Monelli, Matteo
name: Neeley, Jill R.
name: Fabrizio, Michele
name: Martínez-Vázquez, Clara E.
name: Thévenin, Frédéric
name: Sneden, Christopher
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Accurate metallicities of RR Lyrae are extremely important in constraining period-luminosity-metallicity relationships (PLZ), particularly in the near-infrared. We analyse 69 high-resolution spectra of Galactic RR Lyrae stars from the Southern African Large Telescope (SALT). We measure metallicities of 58 of these RR Lyrae stars with typical uncertainties of 0.13 dex. All but one RR Lyrae in this sample has accurate (σ_parallax ~ 10%) parallax from Gaia. Combining these new high resolution spectroscopic abundances with similar determinations from the literature for 93 stars, we present new PLZ relationships in WISE W1 and W2 magnitudes, and the Wesenheit magnitudes W(W1,V-W1) and W(W2,V-W2).
description: 16 pages, 13 figures, accepted in MNRAS
Jasmin Rashid, Politisch instrumentalisiert? Heiligtümer und Kultstätten in Syrakus bis zum Ende des 5. Jh. v. Chr.
Creators: name: Öhlinger, Birgit
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Jasmin Rashid, Politisch instrumentalisiert? Heiligtümer und Kultstätten in Syrakus bis zum Ende des 5. Jh. v. Chr. Studien zur Geschichtsforschung des Altertums Bd. 28. Hamburg: Verlag Dr. Kovač 2014, 264 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Q-systems as cluster algebras II: Cartan matrix of finite type and the polynomial property
Creators: name: Di Francesco, Philippe
name: Kedem, Rinat
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B37

description: We define the cluster algebra associated with the Q-system for the Kirillov-Reshetikhin characters of the quantum affine algebra $U_q(\hat{\g})$ for any simple Lie algebra g, generalizing the simply-laced case treated in [Kedem 2007]. We describe some special properties of this cluster algebra, and explain its relation to the deformed Q-systems which appeared on our proof of the combinatorial-KR conjecture. We prove that the polynomiality of the cluster variables in terms of the ``initial cluster seeds'', including solutions of the Q-system, is a consequence of the Laurent phenomenon and the boundary conditions. We also give a formulation of both Q-systems and generalized T-systems as cluster algebras with coefficients. This provides a proof of the polynomiality of solutions of generalized T-systems with appropriate boundary conditions.
description: 27 pages. Appendices added to include (1) a discussion of generalized T-systems and polynomiality of solutions and (2) associated cluster algebras with coefficients. References added
Laboratory experiments for intense vortical structures in turbulence velocity fields
Creators: name: Mouri, H.
name: Hori, A.
name: Kawashima, Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Vortical structures of turbulence, i.e., vortex tubes and sheets, are studied using one-dimensional velocity data obtained in laboratory experiments for duct flows and boundary layers at microscale Reynolds numbers from 332 to 1934. We study the mean velocity profile of intense vortical structures. The contribution from vortex tubes is dominant. The radius scales with the Kolmogorov length. The circulation velocity scales with the rms velocity fluctuation. We also study the spatial distribution of intense vortical structures. The distribution is self-similar over small scales and is random over large scales. Since these features are independent of the microscale Reynolds number and of the configuration for turbulence production, they appear to be universal.
description: 8 pages, accepted by Physics of Fluids (see http://pof.aip.org/)
Nadin Burkhardt, Bestattungssitten zwischen Tradition und Modifikation. Kulturelle Austauschprozesse in den griechischen Kolonien in Unteritalien und Sizilien vom 8. bis zum 5. Jh. v. Chr.
Creators: name: Hoernes, Matthias
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Nadin Burkhardt, Bestattungssitten zwischen Tradition und Modifikation. Kulturelle Austauschprozesse in den griechischen Kolonien in Unteritalien und Sizilien vom 8. bis zum 5. Jh. v. Chr. Italiká Bd. 2. Wiesbaden: Reichert Verlag 2013, 424 S., 39 farb.- + 70 s/w-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Deliverable D‐JIP2-4.2.3 Integration of surveillance and outbreak data into the software platform (COHESIVE)
Creators: name: Lewicki, Birgit
name: Gottschald, Marion
name: Fusiak, Jakub
name: Rügen, Marco
name: Falenski, Alexander
name: Caldarelli, Valentina
name: Mangone, Iolanda
name: Di Pasquale, Adriano
name: Käsbohrer, Annemarie
name: Weiser, Armin
Publisher: name: Zenodo
Year: 2021
Subjects: FoodChain-Lab
tracing tool
COHESIVE
foodborne disease outbreak

description: This is the Deliverable D-JIP2-4.2.3 of the EJP COHESIVE project. The deliverable deals with the integration of surveillance and outbreak data into the FoodChain-Lab web application as tracing software platform.
Jörg Fündling, Philipp II. von Makedonien
Creators: name: Dietrich, Martin
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Jörg Fündling, Philipp II. von Makedonien. Darmstadt: Philipp von Zabern 2014, 230 S., 19 s/w-Abb. + 2 Kt.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Geometrical Objects on the First Order Jet Space $J^1(T,R^5)$ Produced by the Lorenz Atmospheric DEs System
Creators: name: Neagu, Mircea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53C43, 53C07, 83C22

description: The aim of this paper is to construct natural geometrical objects on the 1-jet space J^1(T,R^5), where $T/subset R$, like a non-linear connection, a generalized Cartan connection, together with its d-torsions and d-curvatures, a jet electromagnetic d-field and a jet Yang-Mills energy, starting from the given Lorenz atmospheric DEs system and the pair of Euclidian metrics $/Delta = (1,/delta_{ij})$ on $T/times R^5$.
description: 9 pages