cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
Creators: name: Pradler, Josef
name: Steffen, Frank Daniel
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Considering gravitino dark matter scenarios, we study constraints on the reheating temperature of inflation. We present the gauge-invariant result for the thermally produced gravitino yield to leading order in the Standard Model gauge couplings. Within the framework of the constrained minimal supersymmetric Standard Model (CMSSM), we find a maximum reheating temperature of about 10^7 GeV taking into account bound-state effects on the primordial $^6$Li abundance. We show that late-time entropy production can relax this constraint significantly. Only with a substantial entropy release after the decoupling of the lightest Standard Model superpartner, thermal leptogenesis remains a viable explanation of the cosmic baryon asymmetry within the CMSSM.
description: 13 pages, 15 figures, revised version accepted for publication (reheating phase considered, improved treatment of entropy production, revised last section, references added)
Non-transitivity from Feedback between environment and traits under selection in a seasonal environment: consequences for experimental evolution
Creators: name: Collot, Dorian
name: Nidelet, Thibault
name: Ramsayer, Johan
name: Martin, Olivier C.
name: Méléard, Sylvie
name: Dillmann, Christine
name: Sicard, Delphine
name: Legrand, Judith
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Batch cultures are frequently used in experimental evolution to study the dynamic of adaptation. Although they are generally considered to simply drive a growth rate increase, other fitness components can also be selected for. Indeed, recurrent batches form a seasonal environment where different phases repeat periodically and different traits can be under selection in the different seasons. Moreover, the system being closed, organism may have a strong impact on the environment. Thus, the study of adaptation should take into account the environment and eco-evolutionary feedbacks. Using data from an experimental evolution on yeast Saccharomyces cerevisiae, we developed a mathematical model to understand which traits are under selection, and what is the impact of the environment for selection in a batch culture. We showed that two kinds of traits are under selection in seasonal environments: life-history traits, related to growth and mortality, but also transition traits, related to the ability to react to environmental changes. The impact of environmental conditions can be summarized by the length of the different seasons which weight selection on each trait: the longer a season is, the higher the selection on associated traits. Since phenotypes drive season length, eco-evolutionary feedbacks emerge. Our results show how evolution in successive batches can affect season lengths and strength of selection on different traits.
Asymptotics of Polynomials Orthogonal with respect to a Logarithmic Weight
Creators: name: Conway, Thomas Oliver
name: Deift, Percy
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: In this paper we compute the asymptotic behavior of the recurrence coefficients for polynomials orthogonal with respect to a logarithmic weight $w(x){\rm d}x = \log \frac{2k}{1-x}{\rm d}x$ on $(-1,1)$, $k > 1$, and verify a conjecture of A. Magnus for these coefficients. We use Riemann-Hilbert/steepest-descent methods, but not in the standard way as there is no known parametrix for the Riemann-Hilbert problem in a neighborhood of the logarithmic singularity at $x=1$.
A Simulation of the Intracluster Medium with Feedback from Cluster Galaxies
Creators: name: Metzler, Christopher A.
name: Evrard, August E.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The formation and evolution of an X--ray cluster is studied using a 3--D N-body + hydrodynamical simulation which includes feedback of energy and iron from cluster galaxies. The differences in evolution and final state between the simulation and a similar run without feedback are highlighted. We address the energetics of cluster gas; the distribution of dark matter, gas, and galaxies; the thermodynamic state of cluster gas, the beta model, and the beta discrepancy; x-ray evolution; the validity of estimates of the binding mass and of the baryon fraction of the cluster; dynamics of the galaxy population and velocity bias; and of the evolution of the iron abundance distribution in the cluster. We find that preheating by galactic winds results in a lower core density for the ICM, which in turn makes the simulated cluster fainter at high redshift and undergo rapid luminosity evolution to the present. A strong iron abundance gradient is present, even at high redshift. Velocity bias is present in the galaxy population; this bias combined with the preheating from winds drives the value of $β_{spec}\,=\,σ^{2}/\left(kT/μm_{p}\right)$ to values less than one. The two fluid simulation, modelling infall only, predicts $β_{spec}\,\geq\,1$, less in line with observation.
description: 36 pages (15 figures available upon request), LaTeX (modified AAS style included), submitted to the Astrophysical Journal, UM AC 93-12
CP and Lepton-Number Violation in GUT Neutrino Models with Abelian Flavour Symmetries
Creators: name: Ellis, John
name: Gomez, Mario E.
name: Lola, Smaragda
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the possible magnitudes of CP and lepton-number-violating quantities in specific GUT models of massive neutrinos with different Abelian flavour groups, taking into account experimental constraints and requiring successful leptogenesis. We discuss SU(5) and flipped SU(5) models that are consistent with the present data on neutrino mixing and upper limits on the violations of charged-lepton flavours and explore their predictions for the CP-violating oscillation and Majorana phases. In particular, we discuss string-derived flipped SU(5) models with selection rules that modify the GUT structure and provide additional constraints on the operators, which are able to account for the magnitudes of some of the coefficients that are often set as arbitrary parameters in generic Abelian models.
description: 30 pages, 6 figures
The metal systems in Q0000--2619 at high resolution
Creators: name: Savaglio, Sandra
name: D'Odorico, Sandro
name: Møller, Palle
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained high, 11 and 14 \kms, and medium, 40 and 53 \kms, resolution spectra of the $z_{em} = 4.11$ quasar Q0000--2619 covering the range 4400 Å to 9265 Å. We identify nine metal absorption systems, of which four were previously known. A fifth previously suggested system at $z_{abs} \approx 3.409$ (Turnshek et al~ 1991) is ruled out by our data. Two of the eight systems for which the \lya~ line is in the observable range have a damped \lya~ line. Six of the nine systems show evidence for complex sub--component structure. At our resolution and S/N we identify a total of 21 sub--components in the nine systems. Five of the nine systems (11 of the 21 components) fall within the $\pm 5000$ \kms~ range of the emission redshift, and are hence classified as \zae~ absorbers. For the two damped systems we find metal abundances of $\leq 1$% and $\leq 8$% of solar values at redshifts of 3.0541 and 3.3901 respectively. These upper limits are consistent with what would be expected from previous determinations at lower redshifts, and our data are hence compatible with earlier conclusions that no evidence is yet found for chemical evolution of intervening damped and Lyman limit absorbers. For the \zae~ systems we found indications of metallicities comparable to, and even in excess of solar values. These much higher values compared to the damped systems, are in favour of the intrinsic hypothesis for these systems.
description: 18 pages, 8 figures available from the authors in ps-format, LaTeX file (standard macro l-aa)
On the possibility to detect multipolar order in URu$_2$Si$_2$ by the electric quadrupolar transition of resonant elastic X-ray scattering
Creators: name: Wang, Y. L.
name: Fabbris, G.
name: Meyers, D.
name: Sung, N. H.
name: Baumbach, R. E.
name: Bauer, E. D.
name: Ryan, P. J.
name: Kim, J. -W.
name: Liu, X.
name: Dean, M. P. M.
name: Kotliar, G.
name: Dai, X.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Resonant elastic X-ray scattering is a powerful technique for measuring multipolar order parameters. In this paper, we theoretically and experimentally study the possibility of using this technique to detect the proposed multipolar order parameters in URu$_2$Si$_2$ at the U-$L_{3}$ edge with the electric quadrupolar transition. Based on an atomic model, we calculate the azimuthal dependence of the quadrupolar transition at the U-$L_{3}$ edge. The results illustrate the potential of this technique for distinguishing different multipolar order parameters. We then perform experiments on ultra-clean single crystals of URu$_2$Si$_2$ at the U-$L_{3}$ edge to search for the predicted signal, but do not detect any indications of multipolar moments within the experimental uncertainty. We theoretically estimate the orders of magnitude of the cross-section and the expected count rate of the quadrupolar transition and compare them to the dipolar transitions at the U-$M_4$ and U-$L_3$ edges, clarifying the difficulty in detecting higher order multipolar order parameters in URu$_2$Si$_2$ in the current experimental setup.
description: 9 pages, 4 figures, Accepted for publication in PRB
Shear thinning in dilute and semidilute solutions of polystyrene and DNA
Creators: name: Pan, Sharadwata
name: Nguyen, Duc At
name: Duenweg, B.
name: Sunthar, P.
name: Sridhar, T.
name: Prakash, J. Ravi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The viscosity of dilute and semidilute unentangled DNA solutions, in steady simple shear flow, has been measured across a range of temperatures and concentrations. For polystyrene solutions, measurements of viscosity have been carried out in the semidilute unentangled regime, while results of prior experimental measurements in the dilute regime have been used for the purpose of data analysis, and for comparison with the behaviour of DNA solutions. Interpretation of the shear rate dependence of viscosity in terms of suitably defined non-dimensional variables, is shown to lead to master plots, independent of temperature and concentration, in each of the two concentration regimes. In the case of semidilute unentangled solutions, defining the Weissenberg number in terms of a concentration dependent large scale relaxation time is found not to lead to data collapse across different concentrations. On the other hand, the use of an alternative relaxation time, with the concentration dependence of a single correlation blob, suggests the existence of universal shear thinning behaviour at large shear rates.
description: 24 pages, 13 figures, supplementary material (see ancillary directory), to appear in Journal of Rheology
Statistical Analyses of Higgs- and Z-Portal Dark Matter Models
Creators: name: Ellis, John
name: Fowlie, Andrew
name: Marzola, Luca
name: Raidal, Martti
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform frequentist and Bayesian statistical analyses of Higgs- and Z-portal models of dark matter particles with spin 0, 1/2 and 1. Our analyses incorporate data from direct detection and indirect detection experiments, as well as LHC searches for monojet and monophoton events, and we also analyze the potential impacts of future direct detection experiments. We find acceptable regions of the parameter spaces for Higgs-portal models with real scalar, neutral vector, Majorana or Dirac fermion dark matter particles, and Z-portal models with Majorana or Dirac fermion dark matter particles. In many of these cases, there are interesting prospects for discovering dark matter particles in Higgs or Z decays, as well as dark matter particles weighing $\gtrsim 100$ GeV. Negative results from planned direct detection experiments would still allow acceptable regions for Higgs- and Z-portal models with Majorana or Dirac fermion dark matter particles.
description: 9 figures, 8 tables, 34 pages. v3: closely matches published version
Supplementary Data S1 from Sost deficiency leads to reduced mechanical strains at the tibia midshaft in strain-matched in vivo loading experiments in mice
Creators: name: Albiol, Laia
name: Cilla, Myriam
name: Pflanz, David
name: Kramer, Ina
name: Kneissel, Michaela
name: Duda, Georg N.
name: Willie, Bettina M.
name: Checa, Sara
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Sclerostin, a product of the Sost gene, is a Wnt-inhibitor and thus negatively regulates bone accrual. Canonical Wnt/β-catenin signalling is also known to be activated in mechanotransduction. Sclerostin neutralizing antibodies are being tested in ongoing clinical trials to target osteoporosis and osteogenesis imperfecta but their interaction with mechanical stimuli on bone formation remains unclear. Sost knockout (KO) mice were examined to gain insight on how long-term Sost deficiency alters the local mechanical environment within the bone. This knowledge is crucial since the strain environment regulates bone adaptation. We characterized the bone geometry at the tibial midshaft of young and adult Sost KO and age-matched littermate control (LC) mice using microcomputed tomography imaging. The cortical area and the minimal and maximal moment of inertia were higher in Sost KO than in LC mice, whereas no difference was detected in either the anterior–posterior or medio-lateral bone curvature. Differences observed between age-matched genotypes were greater in adult mice. We analysed the local mechanical environment in the bone using finite-element models (FEMs), which showed that strains in the tibiae of Sost KO mice are lower than in age-matched LC mice at the diaphyseal midshaft, a region commonly used to assess cortical bone formation and resorption. Our FEMs also suggested that tissue mineral density is only a minor contributor to the strain distribution in tibial cortical bone from Sost KO mice compared to bone geometry. Furthermore, they indicated that although strain gauging experiments matched strains at the gauge site, strains along the tibial length were not comparable between age-matched Sost KO and LC mice or between young and adult animals within the same genotype.
Dynamical susceptibility near a long-wavelength critical point with a nonconserved order parameter
Creators: name: Klein, Avraham
name: Lederer, Samuel
name: Chowdhury, Debanjan
name: Berg, Erez
name: Chubukov, Andrey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the dynamic response of a two-dimensional system of itinerant fermions in the vicinity of a uniform ($\mathbf{Q}=0$) Ising nematic quantum critical point of $d-$wave symmetry. The nematic order parameter is not a conserved quantity, and this permits a nonzero value of the fermionic polarization in the $d-$wave channel even for vanishing momentum and finite frequency: $Π(\mathbf{q} = 0,Ω_m) \neq 0$. For weak coupling between the fermions and the nematic order parameter (i.e. the coupling is small compared to the Fermi energy), we perturbatively compute $Π(\mathbf{q} = 0,Ω_m) \neq 0$ over a parametrically broad range of frequencies where the fermionic self-energy $Σ(ω)$ is irrelevant, and use Eliashberg theory to compute $Π(\mathbf{q} = 0,Ω_m)$ in the non-Fermi liquid regime at smaller frequencies, where $Σ(ω) > ω$. We find that $Π(\mathbf{q}=0,Ω)$ is a constant, plus a frequency dependent correction that goes as $|Ω|$ at high frequencies, crossing over to $|Ω|^{1/3}$ at lower frequencies. The $|Ω|^{1/3}$ scaling holds also in a non-Fermi liquid regime. The non-vanishing of $Π(\mathbf{q}=0, Ω)$ gives rise to additional structure in the imaginary part of the nematic susceptibility $χ^{''} (\mathbf{q}, Ω)$ at $Ω> v_F q$, in marked contrast to the behavior of the susceptibility for a conserved order parameter. This additional structure may be detected in Raman scattering experiments in the $d-$wave geometry.
Direct Detection of Dark Matter Rates for Various Wimps
Creators: name: Oikonomou, V. K.
name: Vergados, J. D.
name: Moustakidis, Ch. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The event rates for the direct detection of a dark matter candidate, which is a Kaluza-Klein gauge boson, are evaluated for a number of nuclear targets. Realistic form factors as well as spin ME and response functions are employed.
description: 23 LaTex pages, 22 eps figures
Summary of feedback from Feedback between environment and traits under selection in a seasonal environment: consequences for experimental evolution
Creators: name: Collot, Dorian
name: Nidelet, Thibault
name: Ramsayer, Johan
name: Martin, Olivier C.
name: Méléard, Sylvie
name: Dillmann, Christine
name: Sicard, Delphine
name: Legrand, Judith
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Batch cultures are frequently used in experimental evolution to study the dynamic of adaptation. Although they are generally considered to simply drive a growth rate increase, other fitness components can also be selected for. Indeed, recurrent batches form a seasonal environment where different phases repeat periodically and different traits can be under selection in the different seasons. Moreover, the system being closed, organism may have a strong impact on the environment. Thus, the study of adaptation should take into account the environment and eco-evolutionary feedbacks. Using data from an experimental evolution on yeast Saccharomyces cerevisiae, we developed a mathematical model to understand which traits are under selection, and what is the impact of the environment for selection in a batch culture. We showed that two kinds of traits are under selection in seasonal environments: life-history traits, related to growth and mortality, but also transition traits, related to the ability to react to environmental changes. The impact of environmental conditions can be summarized by the length of the different seasons which weight selection on each trait: the longer a season is, the higher the selection on associated traits. Since phenotypes drive season length, eco-evolutionary feedbacks emerge. Our results show how evolution in successive batches can affect season lengths and strength of selection on different traits.
Entanglement Entropy of a Scalar Field in a Squeezed State
Creators: name: Katsinis, Dimitrios
name: Pastras, Georgios
name: Tetradis, Nikolaos
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement entropy within a spherical region for a free scalar field in a squeezed state in 3+1 dimensions. We show that, even for small squeezing, a volume term appears, whose coefficient is essentially independent of the field mass. This is in line with Page's argument that the entanglement entropy in an arbitrary quantum state is proportional to the number of degrees of freedom of the smaller subsystem. It follows that squeezed states can be considered as arbitrary quantum states, in contrast to the ground or coherent states that give rise to entanglement entropy that is dominated by a term proportional to the area of the entangling surface.
description: 21 pages, 6 figures. v2: references added. v3 version published in JHEP
Terremoti, distruzione/ricostruzione, tradizione/innovazione e comunità locale
Creators: name: De Bonis, Luciano
name: Giovagnoli, Marco
Publisher: name: Scienze del Territorio
Year: 2019

description: From a territorialist point of view earthquakes, and more generally natural risks, are to be understood as long-term structural invariants of the territory. This involves a change of paradigm, a sort of conceptual transition from ex post intervention to a culture of prevention and programmed maintenance that operates at multiple levels and with multiple cultural visions: from the creation of a ‘safe society’, where security is not only guaranteed by exogenous and institutional actors but by virtuous mechanisms of endogenous organisation, up to the generation of broad vision and long-term perspective scenarios, able to take into account social desiderata and normative visions of development (social creativity, real utopias, etc.), together with the unpredictable inevitability of natural events (in this case earthquakes). For the safe society it is necessary to turn towards a real complementarity between contextual and expert knowledge, whether we speak of social self-defence ability from catastrophic risks, whether of constructive skills, whether finally of activating a scenario building activity, potentially engaging inhabitants and territory in a multigenerational perspective. A perspective clearly identifying a path of neo-centrality of the so-called ‘fragile’ areas, based on the virtuous (re)use of their patrimonial wealth (environmental, cultural, landscape, agro-forestry, etc.), through institutional architectures and practices of self-government of commons.
description: Scienze del Territorio, Vol 7 (2019): Territori fragili. Comunità, patrimonio, progetto
Reentrant phase transition of Born-Infeld-dilaton black holes
Creators: name: Hendi, Seyed Hossein
name: Momennia, Mehrab
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore a novel reentrant phase transition of four-dimensional Born-Infeld-dilaton black hole in which the first order phase transition modify into a zeroth order phase transition below the critical point. Working in the extended phase space with regarding the cosmological constant as a pressure, we study the reentrant behavior of phase transition in the canonical ensemble. We show that these black holes enjoy a zeroth order intermediate-small black hole phase transition as well as a first order phase transition between small and large black holes for a narrow range of temperatures and pressures. We also find that the standard first order small-large black hole phase transition can modify into a zeroth order type. This zeroth order phase transition stands between the critical point and the first order phase transition region. We discuss the significant effect of the scalar field (dilaton) on the mentioned interesting treatment.
description: 9 pages, 5 figures, 2 tables. A section added. Accepted in EPJC
La restanza
Creators: name: Teti, Vito
Publisher: name: Scienze del Territorio
Year: 2019

description: To leave or to stay is a dilemma belonging since ancient times to the history of humanity and to places that have known calamities, earthquakes, landslides, displacements, migrations. The recent earthquakes that struck Central Italy revealed people who do not want to leave their places and their lives, perhaps made of fatigue and loneliness, which they would have liked to escape and which, instead, they realise they love just when they are forced to flee. The choice to come back or to stay is a drive tending to the construction of a new polis, a new way of living and organising spaces, economies, relationships, to the birth of a new community. The word ‘restanza’ (similar but distinct from ‘resilience’) denotes a creative and dynamic act, it means feeling on the road even when standing still. To stay requires the ability to relate past and present, to re-actualise lost and viable routes. Unproductive and abandoned mountain areas, for example, are rediscovered today as harbingers of new resources and opportunities of life.
description: Scienze del Territorio, Vol 7 (2019): Territori fragili. Comunità, patrimonio, progetto
title: Διεθνείς Σχέσεις και Διεθνής Πολιτική
title: ΘΕΩΡΙΕΣ ΚΑΙ ΣΥΓΧΡΟΝΑ ΔΙΕΘΝΗ ΠΡΟΒΛΗΜΑΤΑ
titleType: AlternativeTitle
Creators: name: Irakleidis, Alexios
Publisher: name: Kallipos, Open Academic Editions
Year: 2016
Subjects: ΕΞΩΤΕΡΙΚΗ ΠΟΛΙΤΙΚΗ
ΔΙΠΛΩΜΑΤΙΑ
ΠΟΛΕΜΟΣ
ΕΠΙΛΥΣΗ ΣΥΓΚΡΟΥΣΕΩΝ
ΔΙΕΘΝΕΣ ΔΙΚΑΙΟ
ΣΤΡΑΤΗΓΙΚΗ-ΑΣΦΑΛΕΙΑ
ΙΣΟΡΡΟΠΙΑ ΙΣΧΥΟΣ
ΕΘΝΙΚΙΣΜΟΣ-ΑΥΤΟΔΙΑΘΕΣΗ
ΑΝΘΡΩΠΙΣΤΙΚΗ ΕΠΕΜΒΑΣΗ
ΑΝΘΡΩΠΙΝΑ ΔΙΚΑΙΩΜΑΤΑ
ΔΙΕΘΝΕΙΣ ΟΡΓΑΝΙΣΜΟΙ
ΔΙΕΘΝΕΙΣ ΜΗ ΚΥΒΕΡΝΗΤΙΚΕΣ ΟΡΓΑΝΩΣΕΙΣ
ΠΑΓΚΟΣΜΙΟΠΟΙΗΣΗ
ΓΕΩΠΟΛΙΤΙΚΗ
Foreign Policy
Diplomacy
War
Conflict Resolution
International Law
Strategy-security
Balance Of Power
Nationalism-self-determination
Humanitarian Intervention
Human Rights
International Organizations
International Non-governmental Organizations
Globalization
Geopolitics

description: Οι θεματικές του βιβλίου θα είναι οι ακόλουθες: ο κλάδος των Διεθνών Σχέσεων, οι ρίζες του, η επιστημονική του πορεία από το 1919 που ξεκίνησε την πορεία του μέχρι σήμερα, οι κύριες σχολές σκέψεις (θεωρητικά Παραδείγματα κατά Kuhn), η εξωτερική πολιτική και η διπλωματία, η ισορροπία ισχύος και η στρατηγική-ασφάλεια, ο πόλεμος (αίτια, τερματισμός, κανονιστικές απόψεις για τον πόλεμο), η ειρηνική επίλυση των συγκρούσεων, το διεθνές δίκαιο, ο εθνικισμός και η αυτοδιάθεση των λαών, τα ανθρώπινα δικαιώματα και η ανθρωπιστική επέμβαση, η γεωπολιτική, οι διεθνείς οργανισμοί (και η παγκόσμια διακυβέρνηση) και οι διεθνείς ΜΚΟ.
Blue perturbation spectra from inflation
Creators: name: Mollerach, S.
name: Matarrese, S.
name: Lucchin, F.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate inflationary models leading to density perturbations with a spectral index $n>1$ (``blue spectra"). These perturbation spectra may be useful to simultaneously account for both the amount of ultra large-scale power required to fit cosmic microwave background anisotropies, such as those measured by COBE, and that required to give bulk motions and structures on the $\sim 50~h^{-1}$ Mpc scale.
description: 12 pages, plain TEX
title: ADCO, Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402) (11 H 1160), f. 00176
Creators: name: de la Côte-d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2017
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: comptes
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160), f. 00176, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Accelerating lattice QCD simulations with 2 flavours of staggered fermions on multiple GPUs using OpenACC - a first attempt
Creators: name: Gupta, Sourendu
name: Majumdar, Pushan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present the results of an effort to accelerate a Rational Hybrid Monte Carlo (RHMC) program for lattice quantum chromodynamics (QCD) simulation for 2 flavours of staggered fermions on multiple Kepler K20X GPUs distributed on different nodes of a Cray XC30. We do not use CUDA but adopt a higher level directive based programming approach using the OpenACC platform. The lattice QCD algorithm is known to be bandwidth bound; our timing results illustrate this clearly, and we discuss how this limits the parallelization gains. We achieve more than a factor three speed-up compared to the CPU only MPI program.
description: 14 pages, 6 figures and 2 tables. Details about benchmarking hardware added along with one paragraph on GPU memory bandwidth measurements. Results unchanged. Replaced to match published version
Equivalence of Meson Scattering Amplitudes in Strong Coupling Lattice and Flat Space String Theory
Creators: name: Armoni, Adi
name: Ireson, Edwin
name: Vadacchino, Davide
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider meson scattering in the framework of the lattice strong coupling expansion. In particular we derive an expression for the 4-point function of meson operators in the planar limit of scalar Chromodynamics. Interestingly, in the naive continuum limit the expression coincides with an independently known result, that of the worldline formalism. Moreover, it was argued by Makeenko and Olesen that (assuming confinement) the resulting scattering amplitude in momentum space is the celebrated expression proposed by Veneziano several decades ago. This motivates us to also use holography in order to argue that the continuum expression for the scattering amplitude is related to the result obtained from flat space string theory. Our results hint that at strong coupling and large-$N_c$ the naive continuum limit of the lattice formalism can be related to a flat space string theory.
Cosmological forecasts from the combination of Stage-IV photometric galaxy surveys and the magnification from forthcoming GW observatories
Creators: name: Beltrame, Matteo
name: Bonici, Marco
name: Carbone, Carmelita
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work we have investigated the synergy between Stage-IV galaxy surveys and future GW observatories for constraining the underlying cosmological model of the Universe, focussing on photometric galaxy clustering, cosmic shear and GW magnification as cosmological probes. We have implemented a Fisher matrix approach for the evaluation of the full $6\times2$pt statistics composed by the angular power spectra of the single probes together with their combination. For our analysis, we have in particular considered dynamical dark energy and massive neutrino scenarios. We have found that the improvement to galaxy survey performance is below 1\%, in the case $\ell^{\rm GW}_{\rm max}=100$ and a luminosity distance error of $σ_{d_L}/d_L=10\%$. However, when extending the analysis to $\ell^{\rm GW}_{\rm max}=1000$, we find that the GW magnification improves the galaxy survey performance on all the cosmological parameters, reducing their errors by $3\%$-$5\%$, when $σ_{d_L}/d_L=10\%$, and by $10\%$-$18\%$ when $σ_{d_L}/d_L=1\%$, especially for $M_ν$, $w_0$ and $w_a$. However, here our analysis is unavoidably optimistic: a much more detailed and realistic approach will be needed, especially by including systematic effects. But we can conclude that, in the case of future gravitational wave observatories the inclusion of the gravitational wave magnification can improve Stage-IV galaxy surveys performance on constraining the underlying cosmological model of the Universe.
description: 33 pages, 14 figures. Published n JCAP
Local NMR Relaxation of Dendrimers in the Presence of Hydrodynamic Interactions
Creators: name: Dolgushev, Maxim
name: Schnell, Sebastian
name: Markelov, Denis A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study the role of hydrodynamic interactions for the relaxation of segments' orientations in dendrimers. The dynamics is considered in the Zimm framework. It is shown that inclusion of correlations between segments' orientations plays a major role for the segments' mobility, that reveals itself in the NMR relaxation functions. The enhancement of the reorientation dynamics of segments due to the hydrodynamic interactions is more significant for the inner segments. This effect is clearly pronounced in the reduced spectral density $ωJ(ω)$, whose maximum shifts to higher frequencies when the hydrodynamic interactions are taken into account.
description: Accepted version. The final publication is available at link.springer.com/article/10.1007/s00723-017-0897-6
Supplementary Data S2 from Sost deficiency leads to reduced mechanical strains at the tibia midshaft in strain-matched in vivo loading experiments in mice
Creators: name: Albiol, Laia
name: Cilla, Myriam
name: Pflanz, David
name: Kramer, Ina
name: Kneissel, Michaela
name: Duda, Georg N.
name: Willie, Bettina M.
name: Checa, Sara
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Sclerostin, a product of the Sost gene, is a Wnt-inhibitor and thus negatively regulates bone accrual. Canonical Wnt/β-catenin signalling is also known to be activated in mechanotransduction. Sclerostin neutralizing antibodies are being tested in ongoing clinical trials to target osteoporosis and osteogenesis imperfecta but their interaction with mechanical stimuli on bone formation remains unclear. Sost knockout (KO) mice were examined to gain insight on how long-term Sost deficiency alters the local mechanical environment within the bone. This knowledge is crucial since the strain environment regulates bone adaptation. We characterized the bone geometry at the tibial midshaft of young and adult Sost KO and age-matched littermate control (LC) mice using microcomputed tomography imaging. The cortical area and the minimal and maximal moment of inertia were higher in Sost KO than in LC mice, whereas no difference was detected in either the anterior–posterior or medio-lateral bone curvature. Differences observed between age-matched genotypes were greater in adult mice. We analysed the local mechanical environment in the bone using finite-element models (FEMs), which showed that strains in the tibiae of Sost KO mice are lower than in age-matched LC mice at the diaphyseal midshaft, a region commonly used to assess cortical bone formation and resorption. Our FEMs also suggested that tissue mineral density is only a minor contributor to the strain distribution in tibial cortical bone from Sost KO mice compared to bone geometry. Furthermore, they indicated that although strain gauging experiments matched strains at the gauge site, strains along the tibial length were not comparable between age-matched Sost KO and LC mice or between young and adult animals within the same genotype.
Il passato si trova dove si cerca il futuro
Creators: name: Clemente, Pietro
Publisher: name: Scienze del Territorio
Year: 2019

description: As in all territories just touched by modernisation, even in the inland areas of Italy the new generations, returning or going for the first time in the places of their ancestors, become “indigenous of the XXI century” (Clifford): thus showing that the apparently inevitable modernity, populated by cities, malls, highways, is not our only destiny; and that history is neither closed nor finished, but is full of branches and gems that open up to different ways of thinking time. Thus, in the dialectic between staying and coming back, between resistance and resilience, animated by “place consciousness” (Magnaghi), a space opens for a recovery of memory, even in its dispersed and isolated shreds: a memory that, switching from an archival tradition to the practical concept of safeguard, returns from the past to drive the future.
description: Scienze del Territorio, Vol 7 (2019): Territori fragili. Comunità, patrimonio, progetto
Covert Wireless Communication with Artificial Noise Generation
Creators: name: Soltani, Ramin
name: Goeckel, Dennis
name: Towsley, Don
name: Bash, Boulat
name: Guha, Saikat
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Covert communication conceals the transmission of the message from an attentive adversary. Recent work on the limits of covert communication in additive white Gaussian noise (AWGN) channels has demonstrated that a covert transmitter (Alice) can reliably transmit a maximum of $\mathcal{O}\left(\sqrt{n}\right)$ bits to a covert receiver (Bob) without being detected by an adversary (Warden Willie) in $n$ channel uses. This paper focuses on the scenario where other friendly nodes distributed according to a two-dimensional Poisson point process with density $m$ are present in the environment. We propose a strategy where the friendly node closest to the adversary, without close coordination with Alice, produces artificial noise. We show that this method allows Alice to reliably and covertly send $\mathcal{O}(\min\{{n,m^{γ/2}\sqrt{n}}\})$ bits to Bob in $n$ channel uses, where $γ$ is the path-loss exponent. Moreover, we also consider a setting where there are $N_{\mathrm{w}}$ collaborating adversaries uniformly and randomly located in the environment and show that in $n$ channel uses, Alice can reliably and covertly send $\mathcal{O}\left(\min\left\{n,\frac{m^{γ/2} \sqrt{n}}{N_{\mathrm{w}}^γ}\right\}\right)$ bits to Bob when $γ>2$, and $\mathcal{O}\left(\min\left\{n,\frac{m \sqrt{n}}{N_{\mathrm{w}}^{2}\log^2 {N_{\mathrm{w}}}}\right\}\right)$ when $γ= 2$. Conversely, we demonstrate that no higher covert throughput is possible for $γ>2$.
Ripensare il terremoto
Creators: name: Giacchè, Luciano
Publisher: name: Scienze del Territorio
Year: 2019

description: The periodic recurrence of earthquakes in seismogenic areas imposes a general rethinking of this phenomenon in all its aspects and its phases, from emergency, to building reconstruction and economic and social rebirth, with the full involvement of local populations in the view objective of ‘re-inhabiting’ places.
description: Scienze del Territorio, Vol 7 (2019): Territori fragili. Comunità, patrimonio, progetto
Parameters Values from Feedback between environment and traits under selection in a seasonal environment: consequences for experimental evolution
Creators: name: Collot, Dorian
name: Nidelet, Thibault
name: Ramsayer, Johan
name: Martin, Olivier C.
name: Méléard, Sylvie
name: Dillmann, Christine
name: Sicard, Delphine
name: Legrand, Judith
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Batch cultures are frequently used in experimental evolution to study the dynamic of adaptation. Although they are generally considered to simply drive a growth rate increase, other fitness components can also be selected for. Indeed, recurrent batches form a seasonal environment where different phases repeat periodically and different traits can be under selection in the different seasons. Moreover, the system being closed, organism may have a strong impact on the environment. Thus, the study of adaptation should take into account the environment and eco-evolutionary feedbacks. Using data from an experimental evolution on yeast Saccharomyces cerevisiae, we developed a mathematical model to understand which traits are under selection, and what is the impact of the environment for selection in a batch culture. We showed that two kinds of traits are under selection in seasonal environments: life-history traits, related to growth and mortality, but also transition traits, related to the ability to react to environmental changes. The impact of environmental conditions can be summarized by the length of the different seasons which weight selection on each trait: the longer a season is, the higher the selection on associated traits. Since phenotypes drive season length, eco-evolutionary feedbacks emerge. Our results show how evolution in successive batches can affect season lengths and strength of selection on different traits.
Density profiles of supernova matter and determination of neutrino parameters
Creators: name: Chiu, Shao-Hsuan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The flavor conversion of supernova neutrinos can lead to observable signatures related to the unknown neutrino parameters. As one of the determinants in dictating the efficiency of resonant flavor conversion, the local density profile near the MSW resonance in a supernova environment is, however, not so well understood. In this analysis, variable power-law functions are adopted to represent the independent local density profiles near the locations of resonance. It is shown that the uncertain matter density profile in a supernova, the possible neutrino mass hierarchies, and the undetermined 1-3 mixing angle would result in six distinct scenarios in terms of the survival probabilities of $ν_{e}$ and $\bar{ν_{e}}$. The feasibility of probing the undetermined neutrino mass hierarchy and the 1-3 mixing angle with the supernova neutrinos is then examined using several proposed experimental observables. Given the incomplete knowledge of the supernova matter profile, the analysis is further expanded to incorporate the Earth matter effect. The possible impact due to the choice of models, which differ in the average energy and in the luminosity of neutrinos, is also addressed in the analysis.
description: 27 pages, 10 figures. text and figures revised, references added, to appear in Phys. Rev. D
Matrix decompositions in Quantum Optics: Takagi/Autonne, Bloch-Messiah/Euler, Iwasawa, and Williamson
Creators: name: Houde, Martin
name: McCutcheon, Will
name: Quesada, Nicolás
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this note we summarize four important matrix decompositions commonly used in quantum optics, namely the Takagi/Autonne, Bloch-Messiah/Euler, Iwasawa, and Williamson decompositions. The first two of these decompositions are specialized versions of the singular-value decomposition when applied to symmetric or symplectic matrices. The third factors any symplectic matrix in a unique way in terms of matrices that belong to different subgroups of the symplectic group. The last one instead gives the symplectic diagonalization of real, positive definite matrices of even size. While proofs of the existence of these decompositions exist in the literature, we focus on providing explicit constructions to implement these decompositions using standard linear algebra packages and functionalities such as singular-value, polar, Schur and QR decompositions, and matrix square roots and inverses.
description: 10 pages
Transition from axi- to nonaxisymmetric dynamo modes in spherical convection models of solar-like stars
Creators: name: Viviani, Mariangela
name: Warnecke, Jörn
name: Käpylä, Maarit J.
name: Käpylä, Petri J.
name: Olspert, Nigul
name: Cole-Kodikara, Elizabeth M.
name: Lehtinen, Jyri J.
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We seek to understand the transition from nearly axisymmetric configurations at solar rotation rates to nonaxisymmetric configurations for rapid rotation using 3D numerical simulations of turbulent convection and considering rotation rates between 1 and 30 times the solar value. We find a transition from axi- to nonaxisymmetric solutions at around 1.8 times the solar rotation rate. This transition coincides with a change in the rotation profile from antisolar- to solar-like differential rotation with a faster equator and slow poles. In the solar-like rotation regime, the field configuration consists of an axisymmetric oscillatory field accompanied by an m=1 azimuthal mode (two active longitudes), which also shows temporal variability. At slow (rapid) rotation, the axisymmetric (nonaxisymmetric) mode dominates. The axisymmetric mode produces latitudinal dynamo waves with polarity reversals, while the nonaxisymmetric mode often exhibits a drift in the rotating reference frame and the strength of the active longitudes changes cyclically over time between the different hemispheres. Most of the obtained dynamo solutions exhibit cyclic variability either caused by latitudinal or azimuthal dynamo waves. In an activity-period diagram, the cycle lengths normalized by the rotation period form two different populations as a function of rotation rate or magnetic activity level. The slowly rotating axisymmetric population lies close to what is called the inactive branch in observations, while the rapidly rotating models are close to the superactive branch with a declining cycle to rotation frequency ratio with increasing rotation rate. We can successfully reproduce the transition from axi- to nonaxisymmetric dynamo solutions for high rotation rates, but high-resolution simulations are required to limit the effect of rotational quenching of convection at rotation rates above 20 times the solar value.
description: 19 pages, 17 figures, accepted for publication in A&A
Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies - generic third-order model for non-linear clustering
Creators: name: Buchert, Thomas
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Lagrangian perturbation theory on Friedman-Lemaitre cosmologies investigated and solved up to the second order in earlier papers (Buchert 1992, Buchert \& Ehlers 1993) is evaluated up to the third order. On its basis a model for non-linear clustering applicable to the modeling of large-scale structure in the Universe for generic initial conditions is formulated. A truncated model is proposed which represents the ``main body'' of the perturbation sequence in the early non-linear regime by neglecting all gravitational sources which describe interaction of the perturbations. However, I also give the irrotational solutions generated by the interaction terms to the third order, which induce vorticity in Lagrangian space. The consequences and applicability of the solutions are put into perspective. In particular, the model presented enables the study of previrialization effects in gravitational clustering and the onset of non-dissipative gravitational turbulence within the cluster environment.
description: pages:29, TeX; MPA preprint 729; MNRAS, in press