cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Targeted Chemical Modifications Identify Key Features of Carbohydrate Assemblies and Generate Tailored Carbohydrate Materials
Creators: name: Gim, Soeun
name: Fittolani, Giulio
name: Yu, Yang
name: Zhu, Yuntao
name: Seeberger, Peter H.
name: Ogawa, Yu
name: Delbianco, Martina
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: carbohydrates
subject: electron diffraction
subject: electron tomography
subject: site-specific modifications
subject: supramolecular assemblies
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: The molecular level description of carbohydrate assemblies is hampered by their structural complexity and the lack of suitable analytical methods. Here, we employed systematic chemical modifications to identify key non-covalent interactions that triggered the supramolecular assembly of a disaccharide model. While some modifications disrupted the supramolecular organization, others were tolerated, delivering important information on the aggregation process. The screening identified new geometries, including nanotubes, and twisted ribbons that were characterized with electron tomography and electron diffraction (ED) methods. This work demonstrates that the combination of synthetic chemistry and ED methods is a powerful tool to draw correlations between the molecular structure and the nanoscale architecture of carbohydrate assemblies.
LDA+DMFT Spectral Functions and Effective Electron Mass Enhancement in Superconductor LaFePO
Creators: name: Skornyakov, S. L.
name: Skorikov, N. A.
name: Lukoyanov, A. V.
name: Shorikov, A. O.
name: Anisimov, V. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this Letter we report the first LDA+DMFT results (method combining Local Density Approximation with Dynamical Mean-Field Theory) for spectral properties of superconductor LaFePO. Calculated {\bf k}-resolved spectral functions reproduce recent angle-resolved photoemission spectroscopy (ARPES) data [D. H. Lu {\it et al}., Nature {\bf 455}, 81 (2008)]. Obtained effective electron mass enhancement values $m^{*}/m\approx$ 1.9 -- 2.2 are in good agreement with infrared and optical studies [M. M. Qazilbash {\it et al}., Nature Phys. {\bf 5}, 647 (2009)], de Haas--van Alphen, electrical resistivity, and electronic specific heat measurements results, that unambiguously evidence for moderate correlations strength in LaFePO. Similar values of $m^{*}/m$ were found in the other Fe-based superconductors with substantially different superconducting transition temperatures. Thus, the dynamical correlation effects are essential in the Fe-based superconductors, but the strength of electronic correlations does not determine the value of superconducting transition temperature.
description: 4 pages, 3 figures
Strongly Red-Emissive Molecular Ruby [Cr(bpmp)2]3+ Surpasses [Ru(bpy)3]2+
Creators: name: Reichenauer, Florian
name: Wang, Cui
name: Forster, Christoph
name: Boden, Pit
name: Ugur, Naz
name: Baez-Cruz, Ricardo
name: Kalmbach, Jens
name: Carrella, Luca M.
name: Rentschler, Eva
name: Ramanan, Charusheela
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Quantum yield
subject: Luminescence
subject: Energy
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Gaining chemical control over the thermodynamics and kinetics of photoexcited states is paramount to an efficient and sustainable utilization of photoactive transition metal complexes in a plethora of technologies. In contrast to energies of charge transfer states described by spatially separated orbitals, the energies of spin-flip states cannot straightforwardly be predicted as Pauli repulsion and the nephelauxetic effect play key roles. Guided by multireference quantum chemical calculations, we report a novel highly luminescent spin-flip emitter with a quantum chemically predicted blue-shifted luminescence. The spin-flip emission band of the chromium complex [Cr(bpmp)2]3+ (bpmp = 2,6-bis(2-pyridylmethyl)pyridine) shifted to higher energy from ca. 780 nm observed for known highly emissive chromium(III) complexes to 709 nm. The photoluminescence quantum yields climb to 20%, and very long excited state lifetimes in the millisecond range are achieved at room temperature in acidic D2O solution. Partial ligand deuteration increases the quantum yield to 25%. The high excited state energy of [Cr(bpmp)2]3+ and its facile reduction to [Cr(bpmp)2]2+ result in a high excited state redox potential. The ligand’s methylene bridge acts as a Brønsted acid quenching the luminescence at high pH. Combined with a pH-insensitive chromium(III) emitter, ratiometric optical pH sensing is achieved with single wavelength excitation. The photophysical and ground state properties (quantum yield, lifetime, redox potential, and acid/base) of this spin-flip complex incorporating an earth-abundant metal surpass those of the classical precious metal [Ru(α-diimine)3]2+ charge transfer complexes, which are commonly employed in optical sensing and photo(redox) catalysis, underlining the bright future of these molecular ruby analogues.
Futureproofing through learning and development by using design thinking: A case study of South Africa.
Creators: name: Edgars, Prof Tal
Publisher: name: figshare
Year: 2023
Subjects: Context learning
Human resources management
International business
Artificial intelligence not elsewhere classified
Strategy
Strategy, management and organisational behaviour not elsewhere classified

description: ACTIVATING LEARNING AND DEVELOPMENT THROUGH CONSTRUCTIVIST DEVELOPMENTAL PEDAGOGY
 Constructivist learning is epistemologically positioned in viewing the world with multiple knowledge interpretations and construction. Learning is therefore both contextual and relational, it is about making meaning, which is personal and unique to the individual. For as Biggs (2003, p. 13) states: Learning is thus a way of interacting with the world. As we learn, our conceptions of phenomena change, and we see the world differently. The acquisition of information in itself does not bring about such change, but the way we structure that information and think with it does.
 Developing skills and capabilities, such as those indicated above, that focus on self- development requires learning and development proffesionals to possess a heightened awareness of themselves as professionals and commit to continuous learning, self- development, and renewal. Therefore, “employees must be given the opportunity to develop their own personal and collective positions on human capital issues, and to discover possibilities for activating those positions through praxis” (Boyce et al., 2012, p. 66). It is true today as it was yesterday that workers across each industry and sector will leave to pasture new if they feel undervalued with no growth plan. Upskilling is a solution but not the be all. As demands and delivery requirements change to meet the needs of today’s customer, how can organisations keep pace? Teams have no option but to learn new skills, update on old skills to meet the new. The saying, every day is a learning day rings true to the masses but how can this be done in a structured and strategic way? The field of learning and development is in need of new design thinking. New approaches that capture the challenges of making strategies both real and realisable. Approaches that bring life to the human dimension of creating new futures for institutions, that move us, beyond the sterility of traditional approaches in organisations. The resuscitation of an old approach that offers new possibilities - the metaphor of strategy as a process of design and how to use that to future proof through learning and development.
On second quantization on noncommutative spaces with twisted symmetries
Creators: name: Fiore, Gaetano
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81Txx, 81T75, 16Txx, 53D55, 46L87

description: By application of the general twist-induced star-deformation procedure we translate second quantization of a system of bosons/fermions on a symmetric spacetime in a non-commutative language. The procedure deforms in a coordinated way the spacetime algebra and its symmetries, the wave-mechanical description of a system of n bosons/fermions, the algebra of creation and annihilation operators and also the commutation relations of the latter with functions of spacetime; our key requirement is the mode-decomposition independence of the quantum field. In a conservative view, the use of noncommutative coordinates can be seen just as a way to better express non-local interactions of a special kind. In a non-conservative one, we obtain a covariant framework for QFT on the corresponding noncommutative spacetime consistent with quantum mechanical axioms and Bose-Fermi statistics. One distinguishing feature is that the field commutation relations remain of the type "field (anti)commutator=a distribution". We illustrate the results by choosing as examples interacting non-relativistic and free relativistic QFT on Moyal space(time)s.
description: Latex file, 45 pages. I have corrected a small typo present in 3 points of the previous version and in the version published also in JPA (which had occurred via late careless serial replacements, with no consequences on the results of the calculations): $\beta^*=\beta^{-1}$ has been corrected into $\beta^*=S(\beta^{-1})$
Geomorphology of coralligenous reefs offshore southeastern Sicily (Ionian Sea)
Creators: name: Varzi, Andrea Giulia
name: Fallati, Luca
name: Savini, Alessandra
name: Bracchi, Valentina Alice
name: Bazzicalupo, Pietro
name: Rosso, Antonietta
name: Sanfilippo, Rossana
name: Bertolino, Marco
name: Muzzupappa, Maurizio
name: Basso, Daniela
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Astronomical and Space Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Coralligenous (C) includes calcareous build-ups of biogenic origin, formed since the Holocene transgression. Peculiar columnar-shaped C outcrops were documented offshore Marzamemi village (SE Sicily, Ionian Sea), although the actual extension and distribution were not assessed. Project ‘CRESCIBLUREEF’ produced a new, 17 km2 high-resolution bathymetric map, leading to good knowledge about their extent in this area. C bioconstructions are largely distributed along two depth ranges 36–42 m and 86–102 m water depth. By coupling the documented uplift rate in this region and the Holocene sea-level curve, we were able to interpret the distribution of C outcrops over terraces. However, additional investigation is required to understand: (1) the role of the inherited continental shelf landscape, in creating a favorable substrate for the settlement and growth of C habitats during the Holocene, and (2) the extent to which C bioconstructions can impact the evolution of present-day continental shelf landforms and landscapes.
Non-Markovian modeling of protein folding
Creators: name: Ayaz, Cihan
name: Tepper, Lucas
name: Brunig, Florian N.
name: Kappler, Julian
name: Daldrop, Jan O.
name: Netz, Roland R.
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: protein folding
subject: non-Markovian processes
subject: mean first-passage times
subject: generalized Langevin equation
subject: memory effects
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: We extract the folding free energy landscape and the time-dependent friction function, the two ingredients of the generalized Langevin equation (GLE), from explicit-water molecular dynamics (MD) simulations of the α-helix forming polypeptide alanine9 for a one-dimensional reaction coordinate based on the sum of the native H-bond distances. Folding and unfolding times from numerical integration of the GLE agree accurately with MD results, which demonstrate the robustness of our GLE-based non-Markovian model. In contrast, Markovian models do not accurately describe the peptide kinetics and in particular, cannot reproduce the folding and unfolding kinetics simultaneously, even if a spatially dependent friction profile is used. Analysis of the GLE demonstrates that memory effects in the friction significantly speed up peptide folding and unfolding kinetics, as predicted by the Grote–Hynes theory, and are the cause of anomalous diffusion in configuration space. Our methods are applicable to any reaction coordinate and in principle, also to experimental trajectories from single-molecule experiments. Our results demonstrate that a consistent description of protein-folding dynamics must account for memory friction effects.
How much space is left for a new family?
Creators: name: Bobrowski, Markus
name: Lenz, Alexander
name: Riedl, Johann
name: Rohrwild, Jürgen
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform an exploratory study of the allowed parameter range for the CKM-like mixing of hypothetical quarks of a fourth generation. As experimental constraints we use the tree-level determinations of the 3 $\times$ 3 CKM elements and FCNC processes ($K$-, $D$-, $B_d$-, $B_s$-mixing and the decay $b \to s γ$) under the assumption that the 4 $\times$ 4 CKM matrix is unitary. For the FCNCs we use some simplifying assumptions concerning the QCD corrections. Typically small mixing with the fourth family is favoured, but contrary to expectation we find that also a quite large mixing with the 4th family is not yet excluded.
description: 25 pages, 37 figures, version accepted by PRD
Additional file 1 of Cervical sagittal alignment changes following anterior cervical discectomy and fusion, laminectomy with fusion, and laminoplasty for multisegmental cervical spondylotic myelopathy
Creators: name: Li, Xiang-Yu
name: Wang, Yu
name: Zhu, Wei-Guo
name: Liu, Cheng-Xin
name: Kong, Chao
name: Lu, Shi-Bao
Publisher: name: figshare
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Mathematical Sciences not elsewhere classified
subject: Marine Biology
subject: Virology
subject: Computational Biology

description: Additional file 1. Cases of three surgical methods.
Geomorphology and geoheritage in the Piana Crixia Natural Park (NW Italy)
Creators: name: Ferrando, Andrea
name: Bosino, Alberto
name: Bonino, Enrico
name: Coratza, Paola
name: Faccini, Francesco
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Mental Health
subject: Computational Biology

description: This research presents a set of geomorphological and geoheritage evidence from the Piana Crixia Natural Park, located in the northwest part of Italy. The Natural Park, which covers an area of just under 8 km2, was established for the conservation and enhancement of two geosites: the Piana Crixia mushroom, a 15 m high earth pyramid shaped in conglomerates representing an example of runoff erosion, and badlands landforms that crop out in the area, representing a regional uniqueness and characterize a landscape defined the ‘Langhe of Liguria’. The methodology includes bibliographic research, aerial photographs, fieldwork and analysis of the data provided by the Park's archives. The main maps were realized by combining lithological and geomorphological data with geoheritage elements and information about hiking and tourism. The 1:10,000 map represents the main area of the Piana Crixia Natural Park, while the 1:3000 map was designed to characterize the Piana Crixia mushroom.
Probing an Ixodes ricinus salivary gland yeast surface display with tick-exposed human sera to identify novel candidates for an anti-tick vaccine
Creators: name: Trentelman, Jos J. A.
name: Tomás-Cortázar, Julen
name: Knorr, Sarah
name: Barriales, Diego
name: Hajdusek, Ondrej
name: Sima, Radek
name: Ersoz, Jasmin I.
name: Narasimhan, Sukanya
name: Fikrig, Erol
name: Nijhof, Ard M.
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Parasitic infection
subject: Target identification
subject: Vaccines
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: In Europe, Ixodes ricinus is the most important vector of human infectious diseases, most notably Lyme borreliosis and tick-borne encephalitis virus. Multiple non-natural hosts of I. ricinus have shown to develop immunity after repeated tick bites. Tick immunity has also been shown to impair B. burgdorferi transmission. Most interestingly, multiple tick bites reduced the likelihood of contracting Lyme borreliosis in humans. A vaccine that mimics tick immunity could therefore potentially prevent Lyme borreliosis in humans. A yeast surface display library (YSD) of nymphal I. ricinus salivary gland genes expressed at 24, 48 and 72 h into tick feeding was constructed and probed with antibodies from humans repeatedly bitten by ticks, identifying twelve immunoreactive tick salivary gland proteins (TSGPs). From these, three proteins were selected for vaccination studies. An exploratory vaccination study in cattle showed an anti-tick effect when all three antigens were combined. However, immunization of rabbits did not provide equivalent levels of protection. Our results show that YSD is a powerful tool to identify immunodominant antigens in humans exposed to tick bites, yet vaccination with the three selected TSGPs did not provide protection in the present form. Future efforts will focus on exploring the biological functions of these proteins, consider alternative systems for recombinant protein generation and vaccination platforms and assess the potential of the other identified immunogenic TSGPs.
A multiscale study of electronic structure and quantum transport in $C_{6n^2}H_{6n}$-based graphene quantum dots
Creators: name: Deretzis, I.
name: Forte, G.
name: Grassi, A.
name: La Magna, A.
name: Piccitto, G.
name: Pucci, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We implement a bottom-up multiscale approach for the modeling of defect localization in $C_{6n^2}H_{6n}$ islands, i.e. graphene quantum dots with a hexagonal symmetry, by means of density functional and semiempirical approaches. Using the \textit{ab initio} calculations as a reference, we recognize the theoretical framework under which semiempirical methods describe adequately the electronic structure of the studied systems and thereon proceed to the calculation of quantum transport within the non-equilibrium Green's function formalism. The computational data reveal an impurity-like behavior of vacancies in these clusters and evidence the role of parameterization even within the same semiempirical context. In terms of conduction, failure to capture the proper chemical aspects in the presence of generic local alterations of the ideal atomic structure results in an improper description of the transport features. As an example, we show wavefunction localization phenomena induced by the presence of vacancies and discuss the importance of their modeling for the conduction characteristics of the studied structures.
description: 9 pages, 9 figures, accepted at J. Phys.: Condens. Matter
Geomorphology of coralligenous reefs offshore southeastern Sicily (Ionian Sea)
Creators: name: Varzi, Andrea Giulia
name: Fallati, Luca
name: Savini, Alessandra
name: Bracchi, Valentina Alice
name: Bazzicalupo, Pietro
name: Rosso, Antonietta
name: Sanfilippo, Rossana
name: Bertolino, Marco
name: Muzzupappa, Maurizio
name: Basso, Daniela
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Astronomical and Space Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Coralligenous (C) include calcareous build-ups of biogenic origin, formed since the Holocene transgression. Peculiar columnar-shaped C outcrops were documented offshore Marzamemi village (SE Sicily, Ionian Sea), although the actual extension and distribution were not assessed. Project ‘CRESCIBLUREEF’ produced a new, 17 km2 high-resolution bathymetric map, leading to good knowledge about their extent in this area. C bioconstructions are largely distributed along two depth ranges 36–42 m and 86–102 m water depth. By coupling the documented uplift rate in this region and the Holocene sea-level curve, we were able to interpret the distribution of C outcrops over terraces. However, additional investigation is required to understand: (1) the role of the inherited continental shelf landscape, in creating a favorable substrate for the settlement and growth of C habitats during the Holocene, and (2) the extent to which C bioconstructions can impact the evolution of present-day continental shelf landforms and landscapes.
Transferable Ion Force Fields in Water from a Simultaneous Optimization of Ion Solvation and Ion–Ion Interaction
Creators: name: Loche, Philip
name: Steinbrunner, Patrick
name: Friedowitz, Sean
name: Netz, Roland R.
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Salts
subject: Free energy
subject: Solvation
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: The poor performance of many existing nonpolarizable ion force fields is typically blamed on either the lack of explicit polarizability, the absence of charge transfer, or the use of unreduced Coulomb interactions. However, this analysis disregards the large and mostly unexplored parameter range offered by the Lennard-Jones potential. We use a global optimization procedure to develop water-model-transferable force fields for the ions K+, Na+, Cl–, and Br– in the complete parameter space of all Lennard-Jones interactions using standard mixing rules. No extra-thermodynamic assumption is necessary for the simultaneous optimization of the four ion pairs. After an optimization with respect to the experimental solvation free energy and activity, the force fields reproduce the concentration-dependent density, ionic conductivity, and dielectric constant with high accuracy. The force field is fully transferable between simple point charge/extended and transferable intermolecular potential water models. Our results show that a thermodynamically consistent force field for these ions needs only Lennard-Jones and standard Coulomb interactions.
The CRIRES Search for Planets Around the Lowest-Mass Stars. I. High-Precision Near-Infrared Radial Velocities with an Ammonia Gas Cell
Creators: name: Bean, Jacob L.
name: Seifahrt, Andreas
name: Hartman, Henrik
name: Nilsson, Hampus
name: Wiedemann, Guenter
name: Reiners, Ansgar
name: Dreizler, Stefan
name: Henry, Todd J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Radial velocities measured from near-infrared spectra are a potentially powerful tool to search for planets around cool stars and sub-stellar objects. However, no technique currently exists that yields near-infrared radial velocity precision comparable to that routinely obtained in the visible. We describe a method for measuring high-precision relative radial velocities of these stars from K-band spectra. The method makes use of a glass cell filled with ammonia gas to calibrate the spectrograph response similar to the "iodine cell" technique that has been used very successfully in the visible. Stellar spectra are obtained through the ammonia cell and modeled as the product of a Doppler-shifted template spectrum of the object and a spectrum of the cell, convolved with a variable instrumental profile model. A complicating factor is that a significant number of telluric absorption lines are present in the spectral regions containing useful stellar and ammonia lines. The telluric lines are modeled simultaneously as well using spectrum synthesis with a time-resolved model of the atmosphere over the observatory. The free parameters in the complete model are the wavelength scale of the spectrum, the instrumental profile, adjustments to the water and methane abundances in the atmospheric model, telluric spectrum Doppler shift, and stellar Doppler shift. Tests of the method based on the analysis of hundreds of spectra obtained for late M dwarfs over six months demonstrate that precisions of ~5 m/s are obtainable over long timescales, and precisions of better than 3 m/s can be obtained over timescales up to a week. The obtained precision is comparable to the predicted photon-limited errors, but primarily limited over long timescales by the imperfect modeling of the telluric lines.
description: Accepted for publication in ApJ
Additional file 2 of Effect of a culturally safe student placement on students’ understanding of, and confidence with, providing culturally safe podiatry care
Creators: name: West, Matthew
name: Sadler, Sean
name: Hawke, Fiona
name: Munteanu, Shannon E.
name: Chuter, Vivienne
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 2. Student cultural capability questionnaire.
Radial asymptotics of Lemaitre-Tolman-Bondi dust models
Creators: name: Sussman, Roberto A
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine the radial asymptotic behavior of spherically symmetric Lemaitre-Tolman-Bondi dust models by looking at their covariant scalars along radial rays, which are spacelike geodesics parametrized by proper length $\ell$, orthogonal to the 4-velocity and to the orbits of SO(3). By introducing quasi-local scalars defined as integral functions along the rays, we obtain a complete and covariant representation of the models, leading to an initial value parametrization in which all scalars can be given by scaling laws depending on two metric scale factors and two basic initial value functions. Considering regular "open" LTB models whose space slices allow for a diverging $\ell$, we provide the conditions on the radial coordinate so that its asymptotic limit corresponds to the limit as $\ell\to\infty$. The "asymptotic state" is then defined as this limit, together with asymptotic series expansion around it, evaluated for all metric functions, covariant scalars (local and quasi-local) and their fluctuations. By looking at different sets of initial conditions, we examine and classify the asymptotic states of parabolic, hyperbolic and open elliptic models admitting a symmetry center. We show that in the radial direction the models can be asymptotic to any one of the following spacetimes: FLRW dust cosmologies with zero or negative spatial curvature, sections of Minkowski flat space (including Milne's space), sections of the Schwarzschild--Kruskal manifold or self--similar dust solutions.
description: 44 pages (including a long appendix), 3 figures, IOP LaTeX style. Typos corrected and an important reference added. Accepted for publication in General Relativity and Gravitation
Element-specific contributions to improved magnetic heating of theranostic CoFe2O4 nanoparticles decorated with Pd
Creators: name: Shams, S. Fatemeh
name: Schmitz, Detlef
name: Smekhova, Alevtina
name: Ghazanfari, Mohammad Reza
name: Giesen, Margret
name: Weschke, Eugen
name: Chen, Kai
name: Luo, Chen
name: Radu, Florin
name: Schmitz-Antoniak, Carolin
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Condensed-matter physics
subject: Magnetic properties and materials
subject: Physics
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Decoration with Pd clusters increases the magnetic heating ability of cobalt ferrite (CFO) nanoparticles by a factor of two. The origin of this previous finding is unraveled by element-specific X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) combined with atomic multiplet simulations and density functional theory (DFT) calculations. While the comparison of XAS spectra with atomic multiplet simulations show that the inversion degree is not affected by Pd decoration and, thus, can be excluded as a reason for the improved heating performance, XMCD reveals two interrelated responsible sources: significantly larger Fe and Co magnetic moments verify an increased total magnetization which enhances the magnetic heating ability. This is accompanied by a remarkable change in the field-dependent magnetization particularly for Co ions which exhibit an increased low-field susceptibility and a reduced spin canting behavior in higher magnetic fields. Using DFT calculations, these findings are explained by reduced superexchange between ions on octahedral lattice sites via oxygen in close vicinity of Pd, which reinforces the dominating antiparallel superexchange interaction between ions on octahedral and tetrahedral lattice sites and thus reduces spin canting. The influence of the delocalized nature of Pd 4d electrons on the neighboring ions is discussed and the conclusions are illustrated with spin density isosurfaces of the involved ions. The presented results pave the way to design nanohybrids with tailored electronic structure and magnetic properties.
Covariant Hamiltonian Field Theory
Creators: name: Struckmeier, Jürgen
name: Redelbach, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A consistent, local coordinate formulation of covariant Hamiltonian field theory is presented. Whereas the covariant canonical field equations are equivalent to the Euler-Lagrange field equations, the covariant canonical transformation theory offers more general means for defining mappings that preserve the form of the field equations than the usual Lagrangian description. It is proved that Poisson brackets, Lagrange brackets, and canonical 2-forms exist that are invariant under canonical transformations of the fields. The technique to derive transformation rules for the fields from generating functions is demonstrated by means of various examples. In particular, it is shown that the infinitesimal canonical transformation furnishes the most general form of Noether's theorem. We furthermore specify the generating function of an infinitesimal space-time step that conforms to the field equations.
description: 93 pages, no figures
Adult Tissue Extracellular Matrix Determines Tissue Specification of Human iPSC‐Derived Embryonic Stage Mesodermal Precursor Cells
Creators: name: Ullah, Imran
name: Busch, Jonas Felix
name: Rabien, Anja
name: Ergün, Bettina
name: Stamm, Christof
name: Knosalla, Christoph
name: Hippenstiel, Stefan
name: Reinke, Petra
name: Kurtz, Andreas
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2020
Subjects: subject: cell differentiation
subject: extracellular matrix
subject: pluripotent stem cells
subject: regenerative medicine
subject: tissue engineering
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: The selection of pluripotent stem cell (PSC)-derived cells for tissue modeling and cell therapy will be influenced by their response to the tissue environment, including the extracellular matrix (ECM). Whether and how instructive memory is imprinted in adult ECM and able to impact on the tissue specific determination of human PSC-derived developmentally fetal mesodermal precursor (P-meso) cells is investigated. Decellularized ECM (dECM) is generated from human heart, kidney, and lung tissues and recellularized with P-meso cells in a medium not containing any differentiation inducing components. While P-meso cells on kidney dECM differentiate exclusively into nephronal cells, only beating clusters containing mature and immature cardiac cells form on heart dECM. No tissue-specific differentiation of P-meso cells is observed on endoderm-derived lung dECM. P-meso-derived endothelial cells, however, are found on all dECM preparations independent of tissue origin. Clearance of heparan-sulfate proteoglycans (HSPG) from dECM abolishes induction of tissue-specific differentiation. It is concluded that HSPG-bound factors on adult tissue-derived ECM are essential and sufficient to induce tissue-specific specification of uncommitted fetal stage precursor cells.
Morphology of the submerged Ferdinandea Island, the ‘Neverland’ of the Sicily Channel (central Mediterranean Sea)
Creators: name: Spatola, Daniele
name: Sulli, Attilio
name: Basilone, Luca
name: Casalbore, Daniele
name: Napoli, Simone
name: Basilone, Gualtiero
name: Chiocci, Francesco Latino
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: We present the bathy-morphological map at a scale of 1: 50,000 of the area around the submerged Ferdinandea Island, the ‘Neverland’ of the Sicily Channel (central Mediterranean Sea). We investigate an area of 100 km2, between 10 and 350 m, which is part of a triangular morphological high, 360 km2 wide, representing the SE-wards prolongation of the Adventure Bank. The study is based on the morphometric analysis based on high resolution multibeam, and sub-bottom CHIRP profiles collected in 2015. The area around the remains of Ferdinandea Island is morphologically shaped by the interplay between volcanic, tectonic, fluid seepage, and oceanographic processes. Since the study area is considered a hot spot of biodiversity affected by maritime traffic (especially in Ferdinandea Channel) and hosting communication pipelines, this map provides insights both for habitat mapping purposes and preliminary marine geohazard assessment due to the occurrence of historically active submarine volcanoes, pockmarks, and mass transport deposits.
Additional file 2 of Limitation of life-sustaining therapies in critically ill patients with COVID-19: a descriptive epidemiological investigation from the COVID-ICU study
Creators: name: Giabicani, Mikhael
name: Le Terrier, Christophe
name: Poncet, Antoine
name: Guidet, Bertrand
name: Rigaud, Jean-Philippe
name: Quenot, Jean-Pierre
name: Mamzer, Marie-France
name: Pugin, Jérôme
name: Weiss, Emmanuel
name: Bourcier, Simon
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Virology

description: Additional file 2. Participating Sites and COVID–ICU Investigators.
Additional file 1 of Thoughts about health and patient-reported outcomes among people with diabetes mellitus: results from the DiaDec-study
Creators: name: Borgmann, Sandra O.
name: Chernyak, Nadja
name: Haastert, Burkhard
name: Linnenkamp, Ute
name: Andrich, Silke
name: Schlenker, Rabea
name: Razum, Oliver
name: Icks, Andrea
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1: Appendix 1. Description of data: Visualisation of Dolan’s (2011) ‘thoughts about health’ instrument in the DiaDec-study.
Real-Time Dynamics in Quantum Impurity Models with Diagrammatic Monte Carlo
Creators: name: Schiró, Marco
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We extend the recently developed real-time Diagrammatic Monte Carlo method, in its hybridization expansion formulation, to the full Kadanoff-Baym-Keldysh contour. This allows us to study real-time dynamics in correlated impurity models starting from an arbitrary, even interacting, initial density matrix. As a proof of concept we apply the algorithm to study the non equilibrium dynamics after a local quantum quench in the Anderson Impurity Model. Being a completely general approach to real-time dynamics in quantum impurity models it can be used as a solver for Non Equilibrium Dynamical Mean Field Theory.
description: 19 pages, 13 figures, published version
Additional file 2 of Comprehensive analysis of metabolome and transcriptome reveals the mechanism of color formation in different leave of Loropetalum Chinense var. Rubrum
Creators: name: Zhang, Xia
name: Zhang, Li
name: Zhang, Damao
name: Su, Dingding
name: Li, Weidong
name: Wang, Xiangfei
name: Chen, Qianru
name: Cai, Wenqi
name: Xu, Lu
name: Cao, Fuxiang
name: Zhang, Dongling
name: Yu, Xiaoying
name: Li, Yanlin
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 2: Table S2. A list of 207 flavonoid metabolites identified in Loropetalum chinense var. rubrum
Dynamic susceptibilities of the single impurity Anderson model within an enhanced non-crossing approximation
Creators: name: Schmitt, Sebastian
name: Jabben, Torben
name: Grewe, Norbert
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The single impurity Anderson model (SIAM) is studied within an enhanced non-crossing approximation (ENCA). This method is extended to the calculation of susceptibilities and thoroughly tested, also in order to prepare applications as a building block for the calculation of susceptibilities and phase transitions in correlated lattice systems. A wide range of model parameters, such as impurity occupancy, temperature, local Coulomb repulsion and hybridization strength, are studied. Results for the spin and charge susceptibilities are presented. By comparing the static quantities to exact Bethe ansatz results, it is shown that the description of the magnetic excitations of the impurity within the ENCA is excellent, even in situations with large valence fluctuations or vanishing Coulomb repulsion. The description of the charge susceptibility is quite accurate in situations where the singly occupied ionic configuration is the unperturbed ground state; however, it seems to overestimate charge fluctuations in the asymmetric model at too low temperatures. The dynamic spin excitation spectra is dominated by the Kondo-screening of the impurity spin through the conduction band, i.e. the formation of the local Kondo-singlet. A finite local Coulomb interaction U leads to a drastic reduction of the charge response via processes involving the doubly occupied impurity state. In the asymmetric model, the charge susceptibility is enhanced for excitation energies smaller than the Kondo scale T_K due to the influence of valence fluctuations.
description: 16 pages, 13 figures
Optimization of Training and Feedback Overhead for Beamforming over Block Fading Channels
Creators: name: Santipach, Wiroonsak
name: Honig, Michael L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We examine the capacity of beamforming over a single-user, multi-antenna link taking into account the overhead due to channel estimation and limited feedback of channel state information. Multi-input single-output (MISO) and multi-input multi-output (MIMO) channels are considered subject to block Rayleigh fading. Each coherence block contains $L$ symbols, and is spanned by $T$ training symbols, $B$ feedback bits, and the data symbols. The training symbols are used to obtain a Minimum Mean Squared Error estimate of the channel matrix. Given this estimate, the receiver selects a transmit beamforming vector from a codebook containing $2^B$ {\em i.i.d.} random vectors, and sends the corresponding $B$ bits back to the transmitter. We derive bounds on the beamforming capacity for MISO and MIMO channels and characterize the optimal (rate-maximizing) training and feedback overhead ($T$ and $B$) as $L$ and the number of transmit antennas $N_t$ both become large. The optimal $N_t$ is limited by the coherence time, and increases as $L/\log L$. For the MISO channel the optimal $T/L$ and $B/L$ (fractional overhead due to training and feedback) are asymptotically the same, and tend to zero at the rate $1/\log N_t$. For the MIMO channel the optimal feedback overhead $B/L$ tends to zero faster (as $1/\log^2 N_t$).
description: accepted for IEEE Trans. Info. Theory, 2010
Additional file 1 of Gender differences in symptom structure of adolescent problematic internet use: A network analysis
Creators: name: Liu, Sihan
name: Zhang, Di
name: Tian, Yuxin
name: Xu, Boya
name: Wu, Xinchun
Publisher: name: figshare
Year: 2023
Subjects: Biotechnology
Science Policy
Mental Health

description: Supplementary Material 1
Additional file 1 of Psychometric validation of the Moroccan version of the EORTC QLQ-C30 in colorectal Cancer patients: cross-sectional study and systematic literature review
Creators: name: Yacir El Alami
name: Hajar Essangri
name: Majbar, Mohammed Anass
name: Boutayeb, Saber
name: Benamr, Said
name: Hadj Omar El Malki
name: Souadka, Amine
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Marine Biology
subject: Cancer
subject: Science Policy

description: Additional file 1.
Seroprevalences of specific antibodies against avian pathogens in free-ranging ring-necked pheasants (Phasianus colchicus) in Northwestern Germany
Creators: name: Gethöffer, Friederike
name: Curland, Nele
name: Voigt, Ulrich
name: Woelfing, Benno
name: Ludwig, Tobias
name: Heffels-Redmann, Ursula
name: Hafez, Hafez Mohamed
name: Lierz, Michael
name: Siebert, Ursula
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Phasianus colchicus
subject: avian pathogens
subject: antibodies
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: Infectious diseases in captive pheasants (Phasianus colchicus) are well known, but there is a lack of knowledge about occurrence and distribution of pathogens in free-ranging pheasants in Germany. We investigated 604 sera from hunted pheasants and 152 sera from wild caught pheasants between 2011 to 2015, with the aim to determine the prevalence of specific antibodies against different viruses: Avian influenza virus (AIV) of subtypes H5, H7, H9, paramyxovirus type 1 (PMV-1), avian encephalomyelitis virus (AEV), infectious bursitis disease virus (IBDV), infectious bronchitis virus (IBV), infectious laryngotracheitis virus (ILTV), avian metapneumovirus (aMPV) and Salmonella sp., Mycoplasma synoviae (MS) and Mycoplasma gallisepticum (MG). In addition, 178 caeca were investigated for Histomonas meleagridis. The study reveals an ongoing circulation of IBV in the wild pheasant population during the study. Also high seroprevalences of specific antibodies against aMPV depending on the area and a strong increase in prevalence of IBDV antibodies in sera of pheasants in Lower Saxony were detected. ILTV antibody prevalences differed between areas and AEV antibody detection differed between years significantly, whereas specific antibodies against PMV-1 could not be detected and antibodies against AIV-H5, -H7 and -H9 and Mycoplasma spp. were detected in very few cases.
Quantum discord and local demons
Creators: name: Brodutch, Aharon
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum discord was proposed as a measure of the "quantumness" of correlations. There are at least three different discord-like quantities, two of which determine the difference between the efficiencies of a Szilard's engine under different sets of restrictions. The three discord measures vanish simulataneosly. We introduce an easy way to test for zero discord, relate it to the Cerf-Adami conditional entropy and show that there is no relation between the discord and the local disitnguishability.
description: 7 pages, RevTeX. Some minor changes after comments from colleagues, some references added. Similar to published version
The Cabibbo Angle in a Supersymmetric D14 Model
Creators: name: Blum, Alexander
name: Hagedorn, Claudia
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a supersymmetric model with the flavor symmetry D14 in which the CKM matrix element |V_{ud}| can take the value |V_{ud}| =cos (pi/14) = 0.97493 implying that the Cabibbo angle theta_C is sin (theta_C) = |V_{us}| = sin (pi/14) = 0.2225. These values are very close to those observed in experiments. The value of |V_{ud}| (theta_C) is based on the fact that different Z2 subgroups of D14 are conserved in the up and down quark sector. In order to achieve this, D14 is accompanied by a Z3 symmetry. The spontaneous breaking of D14 is induced by flavons, which are scalar gauge singlets. The quark mass hierarchy is partly due to the flavor group D14 and partly due to a Froggatt-Nielsen symmetry U(1)_{FN} under which only the right-handed quarks transform. The model is completely natural in the sense that the hierarchies among the quark masses and mixing angles are generated with the help of symmetries. The issue of the vacuum alignment of the flavons is solved up to a small number of degeneracies, leaving four different possible values for |V_{ud}|. Out of these, only one of them leads to a phenomenological viable model. A study of the Z2 subgroup breaking terms shows that the results achieved in the symmetry limit are only slightly perturbed. At the same time they allow |V_{ud}| (theta_C) to be well inside the small experimental error bars.
description: 1+24 pages