cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
HybridSVD: When Collaborative Information is Not Enough
Creators: name: Frolov, Evgeny
name: Oseledets, Ivan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: H.3.3

description: We propose a new hybrid algorithm that allows incorporating both user and item side information within the standard collaborative filtering technique. One of its key features is that it naturally extends a simple PureSVD approach and inherits its unique advantages, such as highly efficient Lanczos-based optimization procedure, simplified hyper-parameter tuning and a quick folding-in computation for generating recommendations instantly even in highly dynamic online environments. The algorithm utilizes a generalized formulation of the singular value decomposition, which adds flexibility to the solution and allows imposing the desired structure on its latent space. Conveniently, the resulting model also admits an efficient and straightforward solution for the cold start scenario. We evaluate our approach on a diverse set of datasets and show its superiority over similar classes of hybrid models.
description: accepted as a long paper at ACM RecSys 2019; 9 pages, 2 figures, 2 tables
Space Tourism: Current Status and Future Prospects
Creators: name: Neha Shrotriya
name: Pradeep Kumar
Publisher: name: Zenodo
Year: 2018

description: Space tourism, as soon as restricted to the imaginations of technology fiction lovers, has emerged as a burgeoning industry with the promise of democratizing get admission to to the cosmos. This evaluation paper navigates thru the historical evolution, cutting-edge status, and future possibilities of area tourism. From the pioneering ventures of space businesses to the current endeavors of personal entities, the adventure unfolds, encompassing suborbital flights, orbital hotels, and the technological improvements propelling this transformative enterprise. The evaluation extends to economic impact, regulatory considerations, and the myriad demanding situations going through area tourism. As we glimpse into the destiny, the paper explores the possibilities of extended space remains, lunar tourism, and the societal implications of this paradigm shift in human exploration. The evaluation concludes by emphasizing the delicate stability required to harness the capability of space tourism while making sure protection, sustainability, and accountable growth.
Forms of meteorological knowledge 1750–1850 in German countries and beyond
Creators: name: Richter, Linda
Publisher: name: FID GEO
Year: 2020

description: The complexity of atmospherical processes has always yielded a multitude of ways of knowing about the weather. What has been lacking in the historiography of meteorology so far is a way to formulate differences between forms of knowledge in a way that does not privilege modern scientific structures, but focuses instead on the epistemological category of causality. Using causality as ground of comparison for different knowledge claims, I shall argue, may enable researchers to investigate meteorological knowledge across time periods, perhaps even geographical regions, in a more symmetrical manner. This review demonstrates this approach as a means to organize a large set of historical meteorological writings from German countries between 1750 and 1850. Three distinct forms of knowledge (Semiotics, Physics, and Organics of the weather) during that time and in that region are suggested and will be described. While a bibliography with a national perspective from the 1880s was the basis for the selection of historical sources, such a setup proved awkward even to contemporaries. In addition, the bibliography came with a number of biases and shortcomings that will be critically reviewed. This article is categorized under: Climate, History, Society, Culture > Major Historical Eras
Supersolid phases in the extended boson hubbard model
Creators: name: Ng, Kwai-Kong
name: Chen, Y. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a comprehensive numerical study on the ground state phase diagram of the two-dimensional hardcore boson extended Hubbard model with nearest ($V_1$) and next nearest neighbor ($V_2$) repulsions. In addition to the quantum solid and superfluid phases, we report the existence of striped supersolid and three-quarter (quarter) filled supersolid at commensurate density $ρ=0.75$ (0.25) due to the interplay of $V_1$ and $V_2$ interactions. The nature of three-quarter filled supersolid and the associated quantum solid will be discussed. Quantum phase transition between the two supersolids of different symmetries is observed and is clearly of first order.
description: 4 pages, 6 figures
Constraining the final fates of massive stars by oxygen and iron enrichment history in the Galaxy
Creators: name: Suzuki, Akihiro
name: Maeda, Keiichi
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent observational studies of core-collapse supernovae suggest only stars with zero-age main sequence masses smaller than $16$-$18\ M_\odot$ explode when they are red supergiants, producing type IIP supernovae. This may imply that more massive stars produce other types of supernovae or they simply collapse to black holes without giving rise to bright supernovae. This failed supernova hypothesis can lead to significantly inefficient oxygen production because oxygen abundantly produced in inner layers of massive stars with zero-age main sequence masses around $20$-$30\ M_\odot$ might not be ejected into the surrounding interstellar space. We first assume an unspecified population of oxygen injection events related to massive stars and obtain a model-independent constraint on how much oxygen should be released in a single event and how frequently such events should happen. We further carry out one-box galactic chemical enrichment calculations with different mass ranges of massive stars exploding as core-collapse supernovae. Our results suggest that the model assuming that all massive stars with $9$-$100\ M_\odot$ explode as core-collapse supernovae is still most appropriate in explaining the solar abundances of oxygen and iron and their enrichment history in the Galaxy. The oxygen mass in the Galaxy is not explained when assuming that only massive stars with zero-age main sequence masses in the range of 9-17 $M_\odot$, contribute to the galactic oxygen enrichment. This finding implies that a good fraction of stars more massive than $17M_\odot$ should eject their oxygen layers in either supernova explosions or some other mass loss processes.
description: 20 pages, 7 figures, accepted for publication in ApJ
Variable VHE gamma-ray emission from non-blazar AGNs
Creators: name: Rieger, F. M.
name: Aharonian, F. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The observation of rapidly variable very high energy (VHE) gamma-rays from non-aligned active galactic nuclei (AGNs), as reported from M87, proves challenging for conventional theoretical acceleration and emission models. We re-examine the centrifugal acceleration of particles by rotating jet magnetospheres in the vicinity of accreting supermassive black hole systems and analyze the energy constraints imposed for highly underluminous systems. Applications are presented for conditions expected to be present in the radio galaxy M87, assuming accretion onto the central black hole to occur in an advection-dominated (ADAF) mode. We show that for a highly underluminous source like M87, centrifugally accelerated electrons may reach Lorentz factors up to $γ\sim (10^7-10^8)$, allowing inverse Compton (Thomson) upscattering of sub-mm disk photons to the TeV regime. Upscattering of Comptonized disk photons results in a flat TeV spectrum $L_ν \propto ν^{-α_c}$ with spectral index $α_c \simeq 1.2$. The characteristic variability time scale is of the order $r_{\rm L}/c$, which in the case of M87 corresponds to $\simeq 1.7$ d for a typical light cylinder radius of $r_{\rm L} \simeq 5 r_{\rm s}$. Centrifugal acceleration could thus provide a natural explanation for the challenging VHE emission features in M87. Our results suggest that some advection-dominated accreting (non-blazar) AGNs could well be observable VHE emitting sources. (abridged)
description: 4 pages, A&A Letters; typos (r_l) fixed, Journal ref. added
Metabolic profile of patients with coronary artery disease and comorbid obesity
Creators: name: Maksymets, T.
name: Faynyk, A.
name: Sklyarov, E.
Publisher: name: figshare
Year: 2018
Subjects: subject: 110303 Clinical Microbiology
subject: FOS: Clinical medicine
subject: 111502 Clinical Pharmacology and Therapeutics
subject: Diseases
subject: 111102 Dietetics and Nutrigenomics
subject: FOS: Health sciences

description: Cardiovascular diseases (CVD) are the leading cause of death worldwide. Most CVD can be prevented by modification of such risk factors as tobacco use, obesity and unhealthy diet, physical inactivity and harmful use of alcohol. Patients with CVD or who are at high cardiovascular risk due to the presence of risk factors such as dyslipidemia, hypertension, diabetes mellitus type 2, need early detection and management of these states. The article describes differences between metabolic profile of patients with obesity and coronary artery disease. The study included 58 patients. They were divided into 3 groups: 1st - patients with BMI <30 and CAD, 2nd - patients with BMI>30 and CAD, and 3rd - patients with BMI>30. 1st and 2nd group of patients were treated with atorvastatin in the dose of 40 mg for 2 years, 3rd - untreated. The results indicate that significant difference was faund in the lipid profile between groups of patients treated with atorvastatin in the dose of 40 mg . Transaminases and uric acid levels were different but within the reference range. The difference was found in serum glucose, insulin and HOMA-IR between participants of the 2-nd and other groups. We observed significant insulin resistance in the group of patients with coronary heart disease, obesity, treated with atorvastatin. So, administration of atorvastatin to the patients with IHD and obesity may negatively impact carbohydrate exchange and serve as a possible cause of diabetes melitus type 2 development.
An alternative NMSSM phenomenology with manifest perturbative unification
Creators: name: Barbieri, Riccardo
name: Hall, Lawrence J.
name: Papaioannou, Anastasios Y.
name: Pappadopulo, Duccio
name: Rychkov, Vyacheslav S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Can supersymmetric models with a moderate stop mass be made consistent with the negative Higgs boson searches at LEP, while keeping perturbative unification manifest? The NMSSM achieves this rather easily, but only if extra matter multiplets filling complete SU(5) representations are present at intermediate energies. As a concrete example which makes use of this feature, we give an analytic description of the phenomenology of a constrained NMSSM close to a Peccei-Quinn symmetry point. The related pseudo-Goldstone boson appears in decays of the Higgs bosons and possibly of the lightest neutralino, and itself decays into (b anti-b) and (tau anti-tau).
description: 19 pages, 13 figures; v2: possibility of pseudo-Goldstone below 2m_b threshold added, version published by JHEP
Development of half metallicity within mixed magnetic phase of Cu$_{1-x}$Co$_x$MnSb alloy
Creators: name: Bandyopadhyay, Abhisek
name: Neogi, Swarup Kumar
name: Paul, Atanu
name: Meneghini, Carlo
name: Dasgupta, Indra
name: Bandyopadhyay, Sudipta
name: Ray, Sugata
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Cubic Half-Heusler Cu$_{1-x}$Co$_x$MnSb (0 $\leq$ $x$ $\leq$ 0.1) compounds have been investigated both experimentally and theoretically for their magnetic, transport and electronic properties in search of possible half metallic antiferromagnetism. The systems (Cu,Co)MnSb are of particular interest as the end member alloys CuMnSb and CoMnSb are semi metallic (SM) antiferromagnetic (AFM) and half metallic (HM) ferromagnetic (FM), respectively. Clearly, Co-doping at the Cu-site of CuMnSb introduces changes in the carrier concentration at the Fermi level that may lead to half-metallic ground state but there remains a persistent controversy whether the AFM to FM transition occurs simultaneously. Our experimental results reveal that the AFM to FM magnetic transition occurs through a percolation mechanism where Co-substitution gradually suppresses the AFM phase and forces FM polarization around every dopant cobalt. As a result a mixed magnetic phase is realized within this composition range while a nearly HM band structure is developed already at the 10% Co-doping. Absence of T$^2$ dependence in the resistivity variation at low T-region serves as an indirect proof of opening up an energy gap at the Fermi surface in one of the spin channels. This is further corroborated by the ab-initio electronic structure calculations that suggests a nearly ferromagnetic half-metallic ground state is stabilized by Sb-p holes produced upon Co doping.
Critical Behavior of Disordered Systems with a Free Surface
Creators: name: Belim, S. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The behavior of homogeneous and disordered systems with a free boundary is described on the basis of group theory in the two-loop approximation directly in three-dimensional space. The effect of the free boundary on the regime of the bulk critical behavior is revealed. It is shown that the boundedness of the system slightly affects the regime of the bulk critical behavior in the case of the ordinary transition, whereas this effect is more noticeable in the case of the special transition. Surface critical phenomena are described for homogeneous and disordered systems, and the critical exponents are calculated in the two-loop approximation. It is shown that the effect of impurities is insignificant in the special phase transition, whereas it is more noticeable in the ordinary phase transition. The derived critical exponents are compared with the computer-simulation results.
description: 19 pages, 2 figures
Bayesian geomorphology
Creators: name: Korup, Oliver
Publisher: name: FID GEO
Year: 2020

description: The rapidly growing amount and diversity of data are confronting us more than ever with the need to make informed predictions under uncertainty. The adverse impacts of climate change and natural hazards also motivate our search for reliable predictions. The range of statistical techniques that geomorphologists use to tackle this challenge has been growing, but rarely involves Bayesian methods. Instead, many geomorphic models rely on estimated averages that largely miss out on the variability of form and process. Yet seemingly fixed estimates of channel heads, sediment rating curves or glacier equilibrium lines, for example, are all prone to uncertainties. Neighbouring scientific disciplines such as physics, hydrology or ecology have readily embraced Bayesian methods to fully capture and better explain such uncertainties, as the necessary computational tools have advanced greatly. The aim of this article is to introduce the Bayesian toolkit to scientists concerned with Earth surface processes and landforms, and to show how geomorphic models might benefit from probabilistic concepts. I briefly review the use of Bayesian reasoning in geomorphology, and outline the corresponding variants of regression and classification in several worked examples. © 2020 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd
Fractal Dimensions of a Weakly Clustered Distribution and the Scale of Homogeneity
Creators: name: Bagla, J. S.
name: Yadav, Jaswant
name: Seshadri, T. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Homogeneity and isotropy of the universe at sufficiently large scales is a fundamental premise on which modern cosmology is based. Fractal dimensions of matter distribution is a parameter that can be used to test the hypothesis of homogeneity. In this method, galaxies are used as tracers of the distribution of matter and samples derived from various galaxy redshift surveys have been used to determine the scale of homogeneity in the Universe. Ideally, for homogeneity, the distribution should be a mono-fractal with the fractal dimension equal to the ambient dimension. While this ideal definition is true for infinitely large point sets, this may not be realised as in practice, we have only a finite point set. The correct benchmark for realistic data sets is a homogeneous distribution of a finite number of points and this should be used in place of the mathematically defined fractal dimension for infinite number of points (D) as a requirement for approach towards homogeneity. We derive the expected fractal dimension for a homogeneous distribution of a finite number of points. We show that for sufficiently large data sets the expected fractal dimension approaches D in absence of clustering. It is also important to take the weak, but non-zero amplitude of clustering at very large scales into account. In this paper we also compute the expected fractal dimension for a finite point set that is weakly clustered. Clustering introduces departures in the Fractal dimensions from D and in most situations the departures are small if the amplitude of clustering is small. Features in the two point correlation function, like those introduced by Baryon Acoustic Oscillations (BAO) can lead to non-trivial variations in the Fractal dimensions where the amplitude of clustering and deviations from D are no longer related in a monotonic manner.
description: 10 pages, 5 figures. accepted for publication in the MNRAS
Quantifying the Effects of EMIC Wave Scattering and Magnetopause Shadowing in the Outer Electron Radiation Belt by Means of Data Assimilation
Creators: name: Cervantes, S.
name: Shprits, Y. Y.
name: Aseev, N. A.
name: Allison, H. J.
Publisher: name: FID GEO
Year: 2020

description: In this study we investigate two distinct loss mechanisms responsible for the rapid dropouts of radiation belt electrons by assimilating data from Van Allen Probes A and B and Geostationary Operational Environmental Satellites (GOES) 13 and 15 into a 3-D diffusion model. In particular, we examine the respective contribution of electromagnetic ion cyclotron (EMIC) wave scattering and magnetopause shadowing for values of the first adiabatic invariant μ ranging from 300 to 3,000 MeV G−1. We inspect the innovation vector and perform a statistical analysis to quantitatively assess the effect of both processes as a function of various geomagnetic indices, solar wind parameters, and radial distance from the Earth. Our results are in agreement with previous studies that demonstrated the energy dependence of these two mechanisms. We show that EMIC wave scattering tends to dominate loss at lower L shells, and it may amount to between 10%/hr and 30%/hr of the maximum value of phase space density (PSD) over all L shells for fixed first and second adiabatic invariants. On the other hand, magnetopause shadowing is found to deplete electrons across all energies, mostly at higher L shells, resulting in loss from 50%/hr to 70%/hr of the maximum PSD. Nevertheless, during times of enhanced geomagnetic activity, both processes can operate beyond such location and encompass the entire outer radiation belt.
Characterization of High Purity Germanium Point Contact Detectors with Low Net Impurity Concentration
Creators: name: Mertens, S.
name: Hegai, A.
name: Radford, D. C.
name: Abgrall, N.
name: Chan, Y. -D.
name: Martin, R. D.
name: Poon, A. W. P.
name: Schmitt, C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: High Purity germanium point-contact detectors have low energy thresholds and excellent energy resolution over a wide energy range, and are thus widely used in nuclear and particle physics. In rare event searches, such as neutrinoless double beta decay, the point-contact geometry is of particular importance since it allows for pulse-shape discrimination, and therefore for a significant background reduction. In this paper we investigate the pulse-shape discrimination performance of ultra-high purity germanium point contact detectors. It is demonstrated that a minimal net impurity concentration is required to meet the pulse-shape performance requirements.
Impact of Martian Crustal Magnetic Field on the Ion Escape
Creators: name: Dubinin, E.
name: Fraenz, M.
name: Pätzold, M.
name: Woch, J.
name: McFadden, J.
name: Fan, K.
name: Wei, Y.
name: Tsareva, O.
name: Zelenyi, L.
Publisher: name: FID GEO
Year: 2020

description: Based on the Mars Atmosphere and Volatile EvolutioN (MAVEN) observations, we have analyzed the role of the crustal magnetic field on ion loss driven by the direct interaction of the solar wind with the Mars ionosphere. Crustal magnetic fields significantly attenuate the ion ionospheric motions and raise the flux of returning ions. On the other hand, since the ion densities in the ionosphere with strong crustal field are significantly higher than in the ionosphere with a weak crustal magnetic field, the net escape fluxes from the ionosphere with the crustal sources remain vital. The crustal magnetic field also leads to the expansion of the ionosphere and increase of the area exposed to solar wind. As a result, fluxes from higher altitudes essentially contribute to the flow pattern in Martian tail producing an excess of ion loss rate (∼15%) through the southern part of the tail. Thus, effects of inhibition and enhancement of the escape rate by the crustal magnetic field at Mars operate in competition producing a minor influence on the total ion loss.
Neurological features of newborns associated with late preterm and early term birth
Creators: name: Mavropulo, T.K.
Publisher: name: figshare
Year: 2018
Subjects: subject: Diseases
subject: 110706 Immunogenetics (incl. Genetic Immunology)
subject: FOS: Clinical medicine
subject: 110904 Neurology and Neuromuscular Diseases
subject: 111403 Paediatrics
subject: 111499 Paediatrics and Reproductive Medicine not elsewhere classified

description: Infants delivered at 37 and 38 weeks’ gestation are at increased risk for morbidity as compared to infants delivered at 39-40 weeks. Our objectives were to study the frequency of transient neurologic dysfunction in the first months in newborns and infants, depending on the gestational age. We found a higher incidence of risk factors of pregnancy, more frequent need in oxytherapy after birth, and differences of hemo lyquordynamics at the age of 2-3 months.
Investigating the predicted breathing-mode excitation of the Hoyle state
Creators: name: Li, K. C. W.
name: Smit, F. D.
name: Adsley, P.
name: Neveling, R.
name: Papka, P.
name: Nikolskii, E.
name: Brümmer, J. W.
name: Donaldson, L. M.
name: Freer, M.
name: Harakeh, M. N.
name: Nemulodi, F.
name: Pellegri, L.
name: Pesudo, V.
name: Wiedeking, M.
name: Buthelezi, E. Z.
name: Chudoba, V.
name: Förtsch, S. V.
name: Jones, P.
name: Kamil, M.
name: Mira, J. P.
name: O'Neill, G. G.
name: Sideras-Haddad, E.
name: Singh, B.
name: Siem, S.
name: Steyn, G. F.
name: Swartz, J. A.
name: Usman, I. T.
name: van Zyl, J. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Knowledge of the low-lying monopole strength in $\mathrm{^{12}C}$ $-$ the Hoyle state in particular $-$ is crucial for our understanding of both the astrophysically important $3α$ reaction and of $α$-particle clustering. Multiple theoretical models have predicted a breathing mode of the Hoyle State at $E_{x} \approx 9$ MeV, corresponding to a radial in-phase oscillation of the underlying $α$ clusters. The $\mathrm{^{12}C}(α, α^{\prime})\mathrm{^{12}C}$ and $\mathrm{^{14}C}(p, t)\mathrm{^{12}C}$ reactions were employed to populate states in $^{12}$C in order to search for this predicted breathing mode. A self-consistent, simultaneous analysis of the inclusive spectra with R-matrix lineshapes, together with angular distributions of charged-particle decay, yielded clear evidence for excess monopole strength at $E_{x} \approx 9$ MeV which is highly collective. Reproduction of the experimentally observed inclusive yields using a fit, with consistent population ratios for the various broad states, required an additional source of monopole strength. The interpretation of this additional monopole resonance as the breathing-mode excitation of the Hoyle state would provide evidence supporting a $\mathcal{D}_{3h}$ symmetry for the Hoyle state itself. The excess monopole strength may complicate analysis of the properties of the Hoyle state, modifying the temperature dependence of the $3α$ rate at $T_{9} \gtrsim 2$ and ultimately, the predicted nucleosynthesis in explosive stars.
description: 8 pages, 5 figures
Effect of Fe3+ on Phase Relations in the Lower Mantle: Implications for Redox Melting in Stagnant Slabs
Creators: name: Sinmyo, Ryosuke
name: Nakajima, Yoichi
name: McCammon, Catherine A.
name: Miyajima, Nobuyoshi
name: Petitgirard, Sylvain
name: Myhill, Robert
name: Dubrovinsky, Leonid
name: Frost, Daniel J.
Publisher: name: FID GEO
Year: 2019

description: Recent studies have revealed that Earth's deep mantle may have a wider range of oxygen fugacities than previously thought. Such a large heterogeneity might be caused by material subducted into the deep mantle. However, high-pressure phase relations are poorly known in systems including Fe3+ at the top of the lower mantle, where the subducted slab may be stagnant. We therefore conducted high-pressure and high-temperature experiments using a multi-anvil apparatus to study the phase relations in a Fe3+-bearing system at 26 GPa and 1573–2073 K, at conditions prevailing at the top of the lower mantle. At temperatures below 1923 K, MgSiO3-rich bridgmanite, an Fe3+-rich oxide phase, and SiO2 coexist in the recovered sample. Quenched partial melt was observed above 1973 K, which is significantly lower than the solidus temperature of an equivalent Fe3+-free bulk composition. The partial melt obtained from the Fe3+-rich bulk composition has a higher iron content than coexisting bridgmanite, similar to the Fe2+-dominant system. The results suggest that strong mantle oxygen fugacity anomalies might alter the subsolidus and melting phase relations under lower mantle conditions. We conclude that (1) a small amount of melt may be generated from an Al-depleted region of a stagnant slab, such as subducted former banded-iron-formation, and (2) Fe3+ is not transported into the deep part of the lower mantle because of its incompatibility during melting.
Observations of Laboratory and Natural Slow Slip Events: Hikurangi Subduction Zone, New Zealand
Creators: name: Ikari, Matt J.
name: Wallace, Laura M.
name: Rabinowitz, Hannah S.
name: Savage, Heather M.
name: Hamling, Ian J.
name: Kopf, Achim J.
Publisher: name: FID GEO
Year: 2020

description: Slow slip events (SSEs) are recognized as an important component of plate boundary fault slip, and there is a need for laboratory friction data on natural samples to guide comparisons with natural SSEs. Here, we compile a comprehensive catalog of SSEs observed geodetically at the Hikurangi subduction zone offshore northern New Zealand, and compare it with results of laboratory friction experiments that produce laboratory SSEs under plate tectonic driving rates (5 cm/yr). We use samples from Ocean Drilling Program Site 1124 seaward of the Hikurangi subduction zone to represent the plate boundary that hosts shallow SSEs at Hikurangi. We find that laboratory SSEs exhibit a similar displacement record and range of stress drops as the natural SSEs. Results of velocity step tests, which can be used to evaluate frictional instability based on the critical stiffness criterion, indicate that the slow slip activity at Hikurangi is a form of stably-accelerating slip. Our laboratory SSEs provide an alternative method of quantifying (in)stability by direct measurement of the unloading stiffness during the stress drop. The observed dependence of laboratory SSE parameters on effective normal stress is consistent with critical stiffness theory; however, depth-increasing projections based on laboratory data do not match observations from natural SSEs. These differences are likely related to changing temperature and fault rock composition downdip but also complications related to scaling and/or limited sampling. Scientific drilling recently undertaken at the Hikurangi subduction zone should serve to improve and guide future studies of the role of frictional properties for the occurrence of SSEs.
title: ADCO, Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0332
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
name: Petot, Frédéric
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: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0332, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Saint-Seine (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 165 (10 H 6, ms. 139), 354 pages, f. 0332, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Saint-Seine
description: Provenance: http://www.wikidata.org/entity/Q2820709
Application of chiral perturbation theory to 2+1 flavor lattice QCD with O(a)-improved Wilson quarks
Creators: name: CS Collaboration
name: Kadoh, D.
name: Aoki, S.
name: Ishii, N.
name: Ishikawa, K. I.
name: Ishizuka, N.
name: Izubuchi, T.
name: Kanaya, K.
name: Kuramashi, Y.
name: Namekawa, Y.
name: Okawa, M.
name: Sasaki, K.
name: Taniguchi, Y.
name: Ukawa, A.
name: Ukita, N.
name: Yoshie, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We apply chiral perturbation theory to the pseudoscalar meson mass and decay constant data obtained in the PACS-CS Project toward 2+1 flavor lattice QCD simulations with the O(a)-improved Wilson quarks. We examine the existence of chiral logarithms in the quark mass range from m_{ud}=47 MeV down to 6 MeV on a (2.8 fm)^3 box with the lattice spacing a=0.09 fm. Several low energy constants are determined. We also discuss the magnitude of finite size effects based on chiral perturbation theory.
description: 7 pages, 6 figures, talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
The role of assessment of quality of life and health with the index of vital activity in patients with arterial hypertension combined with gout in the family doctor practice
Creators: name: Lazarenko, O.M.
name: Kuzmina, A.P.
Publisher: name: figshare
Year: 2018
Subjects: subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: FOS: Clinical medicine
subject: 110303 Clinical Microbiology
subject: Diseases
subject: 110314 Orthopaedics

description: The number of studies that assess the quality of life of patients with various comorbid diseases is increasing annually. Arterial hypertension and gout is no exception. There are difficulties in managing this category of patients at the primary stage in accordance with current recommendations. The purpose of the study was to analyze the effectiveness of use of questionnaires for assessing the quality of life (SF-36) and health (HAQ) with disability index (DI) in patients with arterial hypertension combined with gout in everyday clinical practice by the family doctor; to assess the correctness of maintaining this category of patients in accordance with current recommendations (EULAR, 2016). A sociological survey of general practitioners (n=30) was carried out by a specially developed questionnaire consisting of three sections. It was found that not all doctors prescribe an adequate dose of colchicine for exacerbation of gouty arthritis, and more than half of the doctors do not use preventive colchicine for 3-6 months after the attack. Most doctors do not use the assessment quality of life (SF-36) and Health Assessment Questionare (HAQ) with a disability index (DI) at admission, but most believe that the results of these questionnaires contain important information on the patient's condition and the prospects for their using at the outpatient stage.
Automated static and moveout corrections of high-resolution seismic data from the Baltic Sea
Creators: name: Reiche, Sönke
name: Berkels, Benjamin
name: Weiß, Benedikt
Publisher: name: FID GEO
Year: 2019

description: High-frequency multichannel seismic systems provide detailed images of the shallow marine subsurface. In order to exploit the redundancy inherent in such data optimally, traveltime corrections need to account for normal moveout and static effects due to vertical source and receiver variations. Misalignment of reflections in common-midpoint gathers will significantly lower the frequency content in the final stack, making this correction particularly important for very high-frequency seismic data. Traditionally, normal moveout correction involves labour-intensive picking of stacking velocities, while static corrections can be, by some techniques, performed automatically. In this paper, we present a high-frequency seismic case study from the Baltic Sea, using seismic image matching as a novel, fully automated technique to perform joint moveout and static corrections. Our multichannel test profiles were acquired offshore Rügen island for wind farm development. Owing to the regular passage of up to 1.5 m high ocean waves during data acquisition, these boomer profiles suffer from strong static effects. We perform joint normal moveout and static corrections by defining the nearest common offset section as a fixed reference frame and minimizing its difference in traveltime with respect to all available common offset sections. Time shifts are computed independent of a pre-defined traveltime curve, using the normalized cross-correlation as a measure of data similarity while penalizing irregular displacements by a regularization term. Time shifts are converted to stacking velocities based on the traditional hyperbolic traveltime equation. Our results are compared with those derived by conventional manual velocity analysis and subsequent trim static corrections. We find that image matching produces stacks of similar quality and stacking velocity models of similar to slightly better quality compared with the conventionally derived ones, revealing the potential of this technique to automatize and significantly speed up this first part of the seismic processing chain.
title: Saturation Control for Reduction of Rotor Blade Lag Vibration
Creators: name: Saguanrum, Sayam
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1998

description: Within  the context of this research, the performance of saturation control for reduction in the vibratory lag motion of helicopter rotor blades is investigated. The single-degree-of-freedom plant, which consists of a spring and damper attached to the rotor blade, is perturbed by an aerodynamic force, and produces the unwanted vibration. To restrict this vibration, the second-order controller is provided to couple with the blade system. It works adaptively, when the system is excited and the controller frequency is set at half of the blade lag frequency in accordance with the relationship of both natural frequencies. The nonlinear terms from the controller respond to the blade system. As a result, the system vibration diminishes, and also the system reaches a steady-state condition.

The equation of motion from the plant, and the control law equation from the controller are nonhomogeneous second-order equations associated with quadratic nonlinearities. Both of them are coupled together. The approximate solution for these two equations is mathematically determined by a perturbation technique called the method of averaging. Finally, the equations of motion are utilized for assembling a simulation model to evaluate the solution, and to examine the efficiency of the system.
Evaluation and communication of pluvial flood risks in urban areas
Creators: name: Schmitt, Theo G.
name: Scheid, Christian
Publisher: name: FID GEO
Year: 2019

description: The increase of pluvial flooding has long been discussed to be a most probable outcome of climate change. This has raised the question of necessary consequences in the design of urban drainage systems in order to secure adequate flood protection and resilience. Due to the uncertainties in future trends of heavy rainfall events, the awareness of remaining risks of extreme pluvial flooding needs to be roused at responsible decision makers and the public as well leading to the implementation of pluvial flood risk management (PFRM) concepts. The state of two core elements of PFRM in Germany are described here: flood hazard and risk evaluation and risk communication. In 2016 the guideline DWA-M 119 has been published to establish city-based PFRM concepts in specification of the European Flood Risk Management Directive (EU 2007). As core elements, the guidelines recommend a site-specific analysis and evaluation of flood hazards and potentials of flood damages to create flood hazard and flood risk maps. In the long run, PFRM needs to be established as a joint community effort and a requirement for more flood resilience. The risk communication within the administration and in the public requires a comprehensible characterization and classification of heavy rainfall to illustrate event extremity. The concept of a rainstorm severity index (RSI) instead of statistical rainfall parameters appears to be promising to gain a better perception by affected citizens and non-hydrology-experts as well. A methodical approach is described to specify and assign site-specific rainfall depths within the severity index scheme RSI12. This article is categorized under: Engineering Water > Sustainable Engineering of Water Engineering Water > Planning Water Engineering Water > Methods
A hybrid adaptive multiresolution approach for the efficient simulation of reactive flows
Creators: name: Gusto, Brandon
name: Plewa, Tomasz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Computational studies that use block-structured adaptive mesh refinement (AMR) approaches suffer from unnecessarily high mesh resolution in regions adjacent to important solution features. This deficiency limits the performance of AMR codes. In this work a novel hybrid adaptive multiresolution (HAMR) approach to AMR-based calculations is introduced to address this issue. The multiresolution (MR) smoothness indicators are used to identify regions of smoothness on the mesh where the computational cost of individual physics solvers may be decreased by replacing direct calculations with interpolation. We suggest an approach to balance the errors due to the adaptive discretization and the interpolation of physics quantities such that the overall accuracy of the HAMR solution is consistent with that of the MR-driven AMR solution. The performance of the HAMR scheme is evaluated for a range of test problems, from pure hydrodynamics to turbulent combustion.
description: 24 pages, 13 figures, 3 tables; accepted for publication in Computer Physics Communications; source code available at https://github.com/blg13/HAMR-FLASH
Grassroots, Astroturf und andere Hybridbildungen zwischen Partei und Bewegung.: Turbulenzen im Verhältnis der inneren und äußeren Peripherie des politischen Systems
Creators: name: Itschert, Adrian
Publisher: name: Zenodo
Year: 2021
Subjects: Politische Parteien
Soziale Bewegungen
Historische Soziologie
Bewegungsparteien
Zentrum und Peripherie

description: Im Laufe der letzten 200 Jahre haben sich zwei komplementäre politische Akteure herausgebildet, die das Publikum moderner Staaten in spezifischer Hinsicht zu mobilisieren versuchen. Politische Parteien haben sich darauf spezialisiert, das Publikum der Wähler für politische Programme zu mobilisieren und soziale Bewegungen konkurrieren darum, in der Öffentlichkeit die Konstruktionen gesellschaftlicher Probleme zu etablieren und die gewählten Regierungen für deren Lösung verantwortlich zu machen. Der Artikel rekonstruiert die Prozesse der Ausdifferenzierung dieser beiden politischen Akteure und analysiert deren Interdependenzen. Er unterscheidet dabei einen routinegesteuerten Modus im Verhältnis dieser beiden politischen Akteure von einem krisenhaften Modus, bei dem es zur Gründung von Bewegungsparteien, zu Formen der asymmetrischen Mobilisierung und zur feindlichen Übernahme etablierter Parteien durch Bewegungsaktivisten kommen kann.
description: + ID der Publikation: unilu_53509 + Sprache: Deutsch + Letzte Aktualisierung: 2021-07-21 16:22:32
Meson correlators in the epsilon-regime of two-flavor lattice QCD
Creators: name: JLQCD Collaboration
name: Fukaya, H.
name: Aoki, S.
name: Hashimoto, S.
name: Kaneko, T.
name: Matsufuru, H.
name: Noaki, J.
name: Ogawa, K.
name: Onogi, T.
name: Yamada, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We calculate the meson correlators in the $ε$-regime of two-flavor QCD. On a $16^3\times 32$ lattice with $a\sim 0.11$ fm, the lattice simulations are performed with the dynamical overlap fermions. We reduce the sea quark mass down to $\sim$ 3 MeV and the valence quark masses are taken in the range 1-4 MeV. The meson correlators in various channels are compared with the predictions of (partially quenched) chiral perturbation theory (ChPT). Including the NLO order of the $ε$-expansion, we extract the leading-order low energy constants of ChPT, the pion decay constant $F$ and the chiral condensate $Σ$, as $F=87.3(5.5)$ MeV and $Σ^{\bar{\mathrm{MS}}}=[237.8(4.0){MeV}]^3$.
description: 7pages, 4figures. Presented at Lattice 2007, Regensburg, Germany, 30 Jul - 4 Aug 2007, minor corrections in figures
Geometric Speed Limit of Accessible Many-Body State Preparation
Creators: name: Bukov, Marin
name: Sels, Dries
name: Polkovnikov, Anatoli
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We analyze state preparation within a restricted space of local control parameters between adiabatically connected states of control Hamiltonians. We formulate a conjecture that the time integral of energy fluctuations over the protocol duration is bounded from below by the geodesic length set by the quantum geometric tensor. The conjecture implies a geometric lower bound for the quantum speed limit (QSL). We prove the conjecture for arbitrary, sufficiently slow protocols using adiabatic perturbation theory and show that the bound is saturated by geodesic protocols, which keep the energy variance constant along the trajectory. Our conjecture implies that any optimal unit-fidelity protocol, even those that drive the system far from equilibrium, are fundamentally constrained by the quantum geometry of adiabatic evolution. When the control space includes all possible couplings, spanning the full Hilbert space, we recover the well-known Mandelstam-Tamm bound. However, using only accessible local controls to anneal in complex models such as glasses or to target individual excited states in quantum chaotic systems, the geometric bound for the quantum speed limit can be exponentially large in the system size due to a diverging geodesic length. We validate our conjecture both analytically by constructing counter-diabatic and fast-forward protocols for a three-level system, and numerically in nonintegrable spin chains and a nonlocal SYK model.
The problem of anemia treatment in patients with chronic heart failure
Creators: name: Ivanov, V.P.
name: Kolesnуk, M.O.
name: Kolesnуk, O.M.
name: Ivanovа Ye.I.
Publisher: name: figshare
Year: 2018
Subjects: subject: 110301 Anaesthesiology
subject: FOS: Clinical medicine
subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: 110299 Cardiorespiratory Medicine and Haematology not elsewhere classified
subject: 110303 Clinical Microbiology
subject: Diseases
subject: 110202 Haematology

description: This article presents the literature review devoted to studying the problem of iron-deficient states in the event of chronic heart failure. The epidemiological indicators, various published data on the impact of anemia on the prognosis of chronic heart failure which show a particular urgency of this problem have been presented. All existing approaches to the treatment of iron deficiency anemia and anemia of chronic diseases in this category of patients have been described. The results of studies on the use of classical oral ferrocorrection, as well as the use of modern approaches – intravenous ferrotherapy, isolated and combined use of recombinant human erythropoietin have been demonstrated. The advantages and disadvantages of each of the methods of anemia correction in patients with chronic heart failure have been discussed. The possible reasons for failures in anemia treatment and the absence of a pronounced impact on the clinical manifestations of chronic heart failure with the use of standard approaches to treatment have been discussed as well.
STM tunneling through a quantum wire with a side-attached impurity
Creators: name: Kwapinski, T.
name: Krawiec, M.
name: Jalochowski, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The STM tunneling through a quantum wire (QW) with a side-attached impurity (atom, island) is investigated using a tight-binding model and the nonequilibrium Keldysh Green function method. The impurity can be coupled to one or more QW atoms. The presence of the impurity strongly modifies the local density of states of the wire atoms, thus influences the STM tunneling through all the wire atoms. The transport properties of the impurity itself are also investigated mainly as a function of the wire length and the way it is coupled to the wire. It is shown that the properties of the impurity itself and the way it is coupled to the wire strongly influence the STM tunneling which is reflected in the density of states and differential conductance.
description: 16 pages, 6 figures