cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Resonant nuclear reaction $^{23}$Mg $(p,γ)$ $^{24}$Al in strongly screening magnetized neutron star crust
Creators: name: Liu, Jing-Jing
name: Liu, Dong-Mei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Basing on the relativistic theory in superstrong magnetic fields (SMFs), we investigate the influence of strong electron screening (SES) on the rates of nuclear reaction $^{23}$Mg $(p, γ)$ $^{24}$Al by three models of Lai (LD), Fushiki et al. (FGP), and Liu et al. (LJ) on the surface of magnetars. Our results show that the rates can be greatly enhanced by three orders of magnitude due to the influence of SES. The rates in our model are in good agreement with those of LD and FGP at relatively low density environment (e.g. $ρ_7<0.01$) for $110^2$), the rates of our model can be 1.58 times and around three orders of magnitude larger than those of FGP and LD, respectively. The significant increase of the rates of our model for $^{23}$Mg $(p, γ)$ $^{24}$Al implies that more $^{23}$Mg will escape from the Ne-Na cycle due to SES in SMFs. As a consequence, the next reaction $^{24}$Al $(β^+, ν)$ $^{24}$Mg will produce more $^{24}$Mg to participate in the Mg-Al cycle. Thus, it may lead to synthesize a large amount of production of $A\geq 20$ nuclides (e.g. $^{26}$Al) on the surface of magnetars. These heavy elements (e.g. $^{26}$Al) may be thrown out due to the compact binary mergers of double neutron star (NS-NS) or black hole and neutron star (BH and NS) systems. Our results may help to understand why the $^{26}$Al is always overabundance in the interstellar space. Our conclusion may be helpful to the investigation of the nucleosynthesis of some heavy elements, the energy generation rate, and the numerical calculations of magnetars evolution.
description: 44 pages, 6 figures, Accepted for publication in Chinese Physics C
Implementing Parrondo's paradox with two coin quantum walks
Creators: name: Rajendran, Jishnu
name: Benjamin, Colin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Parrondo's paradox is ubiquitous in games, ratchets and random walks.The apparent paradox, devised by J.~M.~R.~Parrondo, that two losing games $A$ and $B$ can produce an winning outcome has been adapted in many physical and biological systems to explain their working. However, proposals on demonstrating Parrondo's paradox using quantum walks failed {for large number of steps}. In this work, we show that instead of a single coin if we consider a two coin initial state which may or may not be entangled, we can observe a genuine Parrondo's paradox with quantum walks. Further we focus on reasons for this and pin down the asymmetry in initial two-coin state or asymmetry in shift operator, either of which are necessary for observing a genuine Parrondo's paradox. We extend our work to a 3-coin initial state too with similar results. The implications of our work for observing quantum ratchet like behavior using quantum walks is also discussed.
description: 9 pages, 7 Figures, accepted for publication in Royal Society Open Science
$R_K$ and $R_{K^{\ast}}$ beyond the Standard Model
Creators: name: Hiller, Gudrun
name: Nisandzic, Ivan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Measurements of the ratio of $B \to K^* μμ$ to $B \to K^* e e $ branching fractions, $R_{K^*}$, by the LHCb collaboration strengthen the hints from previous studies with pseudoscalar kaons, $R_K$, for the breakdown of lepton universality, and therefore the Standard Model (SM), to $\sim 3.5 σ$. Complementarity between $R_K$ and $R_{K^*}$ allows to pin down the Dirac structure of the new contributions to be predominantly SM-like chiral, with possible admixture of chirality-flipped contributions of up to ${\cal{O}}( \mbox{few} 10 \%)$. Scalar and vector leptoquark representations $(S_3,V_1,V_3)$ plus possible ($\tilde S_2,V_2$) admixture can explain $R_{K,K^*}$ via tree level exchange. Flavor models naturally predict leptoquark masses not exceeding a few TeV, with couplings to third generation quarks at $O(0.1)$, implying that this scenario can be directly tested at the LHC.
description: v1: 8 pages, v2: references added, typos corrected, matches published version
Selected U.S. Crop Budgets: Yields, Inputs, and Variable Costs, Volume II, North Central Region
Creators: name: Worden, Gaylord
name: Tompkin, Ralph D.
name: Benson, Richard A.
name: Bursch, William G.
name: Buxton, Boyd M.
name: Worden, Gaylord
name: Tompkin, Ralph D.
name: Benson, Richard A.
name: Bursch, William G.
name: Buxton, Boyd M.
Publisher: name: Unknown
Year: 1971
Subjects: subject: Crop Production/Industries
subject: Labor and Human Capital
subject: Production Economics
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Crop costs
subject: Crop budgets
subject: Production costs
subject: North Central region

description: This report contains estimates of variable costs of producing major crops in 24 production areas in the North Central region of the United States. Crops include corn, soybeans, oats, grain sorghum, barley, wheat, hay, rye, flax, and cotton. Budgets show the quantity and value of specific preharvest and harvest inputs, total preharvest costs per acre planted, and total variable costs per acre planted. Detailed breakdowns of crop yields and rates of fertilization are also included.
Causality Implies Inflationary Back-Reaction
Creators: name: Basu, S.
name: Tsamis, N. C.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: There is a widespread belief among inflationary cosmologists that a local observer cannot sense super-horizon gravitons. The argument goes that a local observer would subsume super-horizon gravitons into a redefinition of his coordinate system. We show that adopting this view for pure gravity on de Sitter background leads to time variation in the Hubble parameter measured by a local observer. It also leads to a violation of the gravitational field equation $R = 4 Λ$ because that equation is obeyed by the full metric, rather than the one which has been cleansed of super-horizon modes.
description: 20 pages, 2 figures, uses LaTeX2e, version 2 slightly revised for publication
Grain Boundary Resistance in Copper Interconnects from an Atomistic Model to a Neural Network
Creators: name: Valencia, Daniel
name: Wilson, Evan
name: Jiang, Zhengping
name: Valencia-Zapata, Gustavo A.
name: Klimeck, Gerhard
name: Povolotskyi, Michael
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Orientation effects on the resistivity of copper grain boundaries are studied systematically with two different atomistic tight binding methods. A methodology is developed to model the resistivity of grain boundaries using the Embedded Atom Model, tight binding methods and non-equilibrum Green's functions (NEGF). The methodology is validated against first principles calculations for small, ultra-thin body grain boundaries (<5nm) with 6.4% deviation in the resistivity. A statistical ensemble of 600 large, random structures with grains is studied. For structures with three grains, it is found that the distribution of resistivities is close to normal. Finally, a compact model for grain boundary resistivity is constructed based on a neural network.
description: 18 pages, 12 figures
The initial-value problem for the cubic-quintic NLS with non-vanishing boundary conditions
Creators: name: Killip, Rowan
name: Murphy, Jason
name: Visan, Monica
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the initial-value problem for the cubic-quintic NLS \[ (i\partial_t+Δ)ψ=α_1 ψ-α_{3}\vert ψ\vert^2 ψ+α_5\vert ψ\vert^4 ψ\] in three spatial dimensions in the class of solutions with $|ψ(x)|\to c >0$ as $|x|\to\infty$. Here $α_1$, $α_3$, $α_5$ and $c$ are such that $ψ(x)\equiv c$ is an energetically stable equilibrium solution to this equation. Normalizing the boundary condition to $ψ(x)\to 1$ as $|x|\to\infty$, we study the associated initial-value problem for $u=ψ-1$ and prove a scattering result for small initial data in a weighted Sobolev space.
description: 57 pages
Geodesic models of quasi-periodic-oscillations as probes of quadratic gravity
Creators: name: Maselli, Andrea
name: Pani, Paolo
name: Cotesta, Roberto
name: Gualtieri, Leonardo
name: Ferrari, Valeria
name: Stella, Luigi
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Future very-large-area X-ray instruments (for which the effective area is larger than $>3$m$^2$) will be able to measure the frequencies of quasi-periodic oscillations~(QPOs) observed in the X-ray flux from accreting compact objects with sub-percent precision. If correctly modeled, QPOs can provide a novel way to test the strong-field regime of gravity. By using the relativistic precession model and a modified version of the epicyclic resonance model, we develop a method to test general relativity against a generic class of theories with quadratic curvature corrections. With the instrumentation being studied for future missions such as eXTP, LOFT, or STROBE-X, a measurement of at least two QPO triplets from a stellar mass black hole can set stringent constraints on the coupling parameters of quadratic gravity.
description: Minor changes to match the version published on ApJ
Prediction of helium vapor quality in steady state Two-phase operation for SST-1 Toroidal field magnets
Creators: name: Singh, G. K.
name: Panchal, R.
name: Tanna, V. L.
name: Pradhan, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Steady State Superconducting Tokamak (SST-1) at the Institute for Plasma Research (IPR) is an operational device and is the first superconducting Tokamak in India. Superconducting Magnets System (SCMS) in SST-1 comprises of sixteen Toroidal field (TF) magnets and nine Poloidal Field (PF) magnets manufactured using NbTi/Cu based cable-in-conduit-conductor (CICC) concept. SST-1, superconducting TF magnets are operated in a Cryo-stable manner being cooled with two-phase (TP) flow helium. The typical operating pressure of the TP helium is 1.6 bar (a) at corresponding saturation temperature. The SCMS has a typical cool-down time of about 14 days from 300 K down to 4.5 K using Helium plant of equivalent cooling capacity of 1350 W at 4.5 K. Using the onset of experimental data from the HRL, we estimated the vapor quality for the input heat load on to the TF magnets system. In this paper, we report the characteristics of two-phase flow for given thermo-hydraulic conditions during long steady state operation of the SST-1 TF magnets. Finally, the experimentally obtained results have been compared with the well-known correlations of two-phase flow.
Large-scale circulation patterns and their influence on European winter windstorm predictions
Creators: name: Degenhardt, Lisa
name: Leckebusch, Gregor C.
name: Scaife, Adam A.
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Large-scale patterns (NAO, SCA, EA)
subject: Extra-tropical cyclones
subject: Windstorm
subject: Seasonal forecast
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Severe winter windstorms are amongst the most damaging weather events for Europe and show significant interannual variability. While surface variables (temperature, precipitation) have been successfully predicted for some time now, predictability of severe windstorms caused by extra-tropical cyclones remains less well explored. This study investigates windstorm prediction skill of the UK Met Office Global Seasonal Forecast System Version 5 (GloSea5) for the Northeast-Atlantic and European region. Based on an objective Lagrangian tracking of severe, damage relevant windstorms, three storm parameters are analysed: windstorm frequency and two intensity measures. Firstly, skill based on direct tracking of simulated windstorms is diagnosed. Significant positive skill for storm frequency and intensity is found over an extended area at the downstream end of the storm track, i.e., from the UK to southern Scandinavia. The skill for frequency agrees well with previous studies for older model versions, while the results of event-based intensity are novel. Receiver Operating Characteristic Curves for three smaller regions reveal significant skill for high and low storm activity seasons. Second, skill of windstorm characteristics based on their multi-linear regressions to three dominant large-scale circulation patterns [i.e., the North Atlantic Oscillation (NAO), the Scandinavian Pattern (SCA), and the East-Atlantic Pattern (EA)] are analysed. Although these large-scale patterns explain up to 80% of the interannual variance of windstorm frequency and up to 60% for intensity, the forecast skill for the respectively linear-regressed windstorms do not show systematically higher skill than the direct tracking approach. The signal-to-noise ratio of windstorm characteristics (frequency, intensity) is also quantified, confirming that the signal-to-noise paradox extends to windstorm predictions.
A stellar over-density associated with the Small Magellanic Cloud
Creators: name: Pieres, A.
name: Santiago, B. X.
name: Drlica-Wagner, A.
name: Bechtol, K.
name: van der Marel, R. P.
name: Besla, G.
name: Martin, N. F.
name: Belokurov, V.
name: Gallart, C.
name: Martinez-Delgado, D.
name: Marshall, J.
name: Noel, N. E. D.
name: Majewski, S. R.
name: Cioni, M. -R. L.
name: Li, T. S.
name: Hartley, W.
name: Luque, E.
name: Conn, B. C.
name: Walker, A. R.
name: Balbinot, E.
name: Stringfellow, G. S.
name: Olsen, K. A. G.
name: da Costa, L. N.
name: Ogando, R.
name: Maia, M.
name: Neto, A. Fausti
name: Abbott, T. M. C.
name: Abdalla, F. B.
name: Allam, S.
name: Annis, J.
name: Benoit-Levy, A.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Cunha, C. E.
name: DAndrea, C. B.
name: Desai, S.
name: Diehl, H. T.
name: Doel, P.
name: Flaugher, B.
name: Fosalba, P.
name: Garcia-Bellido, J.
name: Gruen, D.
name: Gruendl, R. A.
name: Gschwend, J.
name: Gutierrez, G.
name: Honscheid, K.
name: James, D.
name: Kuehn, K.
name: Kuropatkin, N.
name: Menanteau, F.
name: Miquel, R.
name: Plazas, A. A.
name: Romer, A. K.
name: Sako, M.
name: Sanchez, E.
name: Scarpine, V.
name: Schubnell, M.
name: Sevilla-Noarbe, I.
name: Smith, R. C.
name: Soares-Santos, M.
name: Sobreira, F.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Tucker, D. L.
name: Wester, W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of a stellar over-density 8$^{\circ}$ north of the center of the Small Magellanic Cloud (Small Magellanic Cloud Northern Over-Density; SMCNOD) using data from the first two years of the Dark Energy Survey (DES) and the first year of the MAGellanic SatelLITEs Survey (MagLiteS). The SMCNOD is indistinguishable in age, metallicity and distance from the nearby SMC stars, being primarly composed of intermediate-age stars (6 Gyr, Z=0.001), with a small fraction of young stars (1 Gyr, Z=0.01). The SMCNOD has an elongated shape with an ellipticity of 0.6 and a size of $\sim$ 6x2 deg. It has an absolute magnitude of $M_V \cong$ -7.7, $r_h = 2.1$ kpc, and $μ_V(r
description: 14 pages, 10 color figures
Implications of residual CP symmetry for leptogenesis in a model with two right-handed neutrinos
Creators: name: Li, Cai-Chang
name: Ding, Gui-Jun
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the interplay between leptogenesis and residual symmetry in the framework of two right-handed neutrino model. Working in the flavor basis, we show that all the leptogenesis CP asymmetries are vanishing for the case of two residual CP transformations or a cyclic residual flavor symmetry in the neutrino sector. If a single remnant CP transformation is preserved in the neutrino sector, the lepton mixing matrix is determined up to a real orthogonal matrix multiplied from the right side. The $R$-matrix is found to depend on only one real parameter, it can take three viable forms, and each entry is either real or purely imaginary. The baryon asymmetry is generated entirely by the CP violating phases in the mixing matrix in this scenario. We perform a comprehensive study for the $Δ(6n^2)$ flavor group and CP symmetry which are broken to a single remnant CP transformation in the neutrino sector and an abelian subgroup in the charged lepton sector. The results for lepton flavor mixing and leptogenesis are presented.
description: 46 pages, 12 figures
Retiolitid graptolites from the collection of Hermann Jaeger III. Paraplectograptus, Gothograptus and their relatives
Creators: name: Maletz, Jörg
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Silurian
subject: Glacial boulder
subject: Graptolites
subject: Retiolitinae
subject: Taxonomy
subject: Evolution
subject: 500 Naturwissenschaften und Mathematik::560 Fossilien, Paläontologie::560 Paläontologie, Paläozoologie

description: The graptolite collection of Hermann Jaeger at the Museum für Naturkunde in Berlin, Germany includes a number of Paraplectograptus and Gothograptus specimens. The material provides another glimpse into the dramatic changes affecting retiolitine graptoloids across the Lundgreni Extinction Event of the mid Homerian (Wenlock, Silurian) which led to the demise of most earlier groups of retiolitines. The material indicates that the diversity of the pre-extinction retiolitines might have been larger than is already known through the recognition of previously unknown constructional details in earlier Gothograptus and Paraplectograptus species. Especially, Gothograptus shows a much higher diversity in the pre-extinction interval than previously recognized. In the Pristiograptus parvus/Gothograptus nassa Biozone interval Gothograptus re-emerged with new species and Semigothograptus is shown to have survived unchanged, indicating that these two genera represent survivors of the extinction event. A number of new genera originated and diversified in the Pristiograptus dubius/Gothograptus nassa to Colonograptus praedeubeli/deubeli Biozone interval, but their evolutionary relationships with earlier taxa are still only partly understood. Paraplectograptus hermanni sp. nov., Gothograptus berolinensis sp. nov. and Gothograptus osgaleae sp. nov. are described as new. Several species are described in open nomenclature due to the lack of sufficiently well preserved material.
Functional, not Taxonomic, Composition of Soil Fungi Reestablishes to Pre-mining Initial State After 52 Years of Recultivation
Creators: name: Roy, Julien
name: Reichel, Rüdiger
name: Brüggemann, Nicolas
name: Rillig, Matthias C.
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Fungal functional guilds
subject: Nutrient stoichiometry
subject: Soil biodiversity loss
subject: Soil reclamation
subject: Succession
subject: Temporal dynamic
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Open-cast mining leads to the loss of naturally developed soils and their ecosystem functions and services. Soil restoration after mining aims to restore the agricultural productivity in which the functions of the fungal community play a crucial role. Whether fungi reach a comparable functional state as in the soil before mining within half a century of recultivation is still unanswered. Here, we characterised the soil fungal community using ITS amplicon Illumina sequencing across a 52-year chronosequence of agricultural recultivation after open-cast mining in northern Europe. Both taxonomic and functional community composition showed profound shifts over time, which could be attributed to the changes in nutrient status, especially phosphorus availability. However, taxonomic composition did not reach the pre-mining state, whereas functional composition did. Importantly, we identified a positive development of arbuscular mycorrhizal root fungal symbionts after the initial three years of alfalfa cultivation, followed by a decline after conversion to conventional farming, with arbuscular mycorrhizal fungi being replaced by soil saprobes. We conclude that appropriate agricultural management can steer the fungal community to its functional pre-mining state despite stochasticity in the reestablishment of soil fungal communities. Nonetheless, conventional agricultural management results in the loss of plant symbionts, favouring non-symbiotic fungi.
Structural and electronic properties of $α,β$-(BEDT-TTF)$_2$I$_3$ and $κ$-(BEDT-TTF)$_2$X$_3$ (X=I,F,Br,Cl) organic charge transfer salts
Creators: name: Commeau, Benjamin
name: Geilhufe, R. Matthias
name: Fernando, Gayanath W.
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: (BEDT-TFF)$_2$I$_3$ charge transfer salts are reported to show superconductivity and pressure induced quasi two-dimensional Dirac cones at the Fermi level. By performing state of the art ab initio calculations in the framework of density functional theory, we investigate the structural and electronic properties of the three structural phases $α$, $β$ and $κ$. \edit{We furthermore report about the irreducible representations of the corresponding electronic band structures, symmetry of their crystal structure, and discuss the origin of band crossings. Additionally, we discuss the chemically induced strain in $κ$-(BEDT-TTF)$_2$I$_3$ achieved by replacing the Iodine layer with other Halogens: Fluorine, Bromine and Chlorine. In the case of $κ$-(BEDT-TTF)$_2$F$_3$, we identify topologically protected crossings within the band structure. These crossings are forced to occur due to the non-symmorphic nature of the crystal.} The calculated electronic structures presented here are added to the organic materials database (OMDB).
description: 7 pages, 4 figures, 2 tables
Quasimap SYZ for toric Calabi-Yau manifolds
Creators: name: Chan, Kwokwai
Publisher: name: arXiv
Year: 2017
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this note, we study the SYZ mirror construction for a toric Calabi-Yau manifold using instanton corrections coming from Woodward's quasimap Floer theory instead of Fukaya-Oh-Ohta-Ono's Lagrangian Floer theory. We show that the resulting SYZ mirror coincides with the one written down via physical means (as expected).
description: v2: 15 pages, 2 figures; to appear in the proceedings of the 7th ICCM (2016) held in Beijing
How Did Corona Crisis Managers in Germany Make Sense of the Psychosocial Situation?
Creators: name: Lüttschwager, Nils
name: Stelzmann, Daniela
name: Gerhold, Lars
name: Sterl, Sebastian
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Corona crisis
subject: Crisis management
subject: Psychosocial information
subject: Sensemaking
subject: Situation picture
subject: 100 Philosophie und Psychologie::150 Psychologie::150 Psychologie

description: Alongside its immediate consequences for physical health, the current Coronavirus pandemic and the associated containment measures have led to multiple psychosocial consequences for the population. While virus containment is the main motive of crisis management, there is, so far, little evidence on how crisis management actors consider findings about the psychosocial state of the German population. This paper therefore examines the role of psychosocial consequences within the work of crisis management organizations during the Corona pandemic in Germany. Against the theoretical background of the sensemaking concept, 14 qualitative interviews were conducted with decision-makers from municipal and state administrations, public health departments, aid organizations, and critical infrastructure organizations. Our results indicate that crisis managers perceive aspects related to the psychosocial situation as relevant, but in a very selective way. They use different and often non-scientific sources to acquire knowledge about the psychosocial consequences. In sum, these aspects do not play a major role in decision-making processes. We argue that the perception and processing of psychosocial consequences depend in particular on the organizational context such as goals, plausibility assumptions, identity conceptions, and problem frames. In order to extend theoretical models of psychosocial crisis management, more detailed knowledge of sensemaking processes in crisis management organizations is necessary.
CHASE 2025 - Supplementary Material for paper title: Exploring Retrospective Meeting Practices and the Use of Data in Agile Teams
Creators: name: Milani, Alessandra
name: Storey, Margaret
name: Katial, Vivek
name: Peate, Lauren
Publisher: name: Zenodo
Year: 2025

description: CHASE 2025 - Supplementary Material for paper title: Exploring Retrospective Meeting Practices and the Use of Data in Agile Teams.
title: Η ενδοκρινολογία και φυσιολογία της προεφηβείας
title: The endocrinology and physiology of preadolescence
titleType: AlternativeTitle
Creators: name: Γάλλου, Ελευθερία-Ευαγγελία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2024
Subjects: Ενδοκρινολογία
Άξονας υποθαλάμου-υπόφυσης-επινεφριδίων (ΥΥΕ)

description: Η παρούσα μελέτη εμβαθύνει στη σύνθετη αλληλεπίδραση ορμονικών, φυσιολογικών, σωματικών και ψυχολογικών παραγόντων που διαμορφώνουν την προεφηβική ανάπτυξη. Μέσω της ενδελεχούς ανάλυσης, αποσαφηνίζεται η ολιστική φύση αυτής της μεταμορφωτικής φάσης και τονίζεται η περίπλοκη δυναμική των ορμονικών διακυμάνσεων και των φυσιολογικών προσαρμογών. Εξετάζοντας τη μετάβαση από την παιδική ηλικία στην προεφηβική και την εφηβεία, υπογραμμίζεται η συνέχεια της ανθρώπινης ωρίμανσης. Επιπρόσθετα, η ανάλυση των ομοιοτήτων και των διαφορών μεταξύ αυτών των σταδίων, παρέχει πολύτιμες γνώσεις για το πολύπλευρο ταξίδι της ανθρώπινης ανάπτυξης. Η εξερεύνηση βιοδεικτών και μεταβολίτων ως διαγνωστικά εργαλεία για την προεφηβική έναρξη προσδιορίζει οδούς για έγκαιρη ανίχνευση και παρέμβαση στην παιδιατρική ενδοκρινολογία. Τίθενται, επιπλέον, οι βάσεις για προληπτικές πρακτικές υγειονομικής περίθαλψης που στοχεύουν στη βελτιστοποίηση των αποτελεσμάτων υγείας στην προεφηβική ηλικία. Με την επισήμανση των προκλήσεων των αναπτυξιακών διαταραχών, όπως η πρώιμη εφηβεία και η καθυστερημένη εφηβεία, προσφέρεται μια ολοκληρωμένη ανάλυση της αιτιολογίας και της διαχείρισής τους. Ακόμη, προτείνονται θεραπευτικές μέθοδοι και προληπτικές στρατηγικές για την ορθή ενημέρωση και τη συμβουλευτική των επαγγελματιών υγείας και των οικογενειών στην πλοήγηση αυτών των καταστάσεων. Συμπερασματικά, προάγεται η ολοκληρωμένη κατανόηση για την προεφηβική φυσιολογία και την ενδοκρινολογία, με ιδιαίτερη έμφαση στους μηχανισμούς που διέπουν αυτήν την κρίσιμη φάση της ανθρώπινης ανάπτυξης. Ο στόχος είναι η ενίσχυση των πρακτικών υγειονομικής περίθαλψης και η βελτιστοποίηση των αποτελεσμάτων για τα άτομα που αφορά, δηλαδή τα παιδιά προεφηβικής ηλικίας.
The first supermassive black holes
Creators: name: Smith, Aaron
name: Bromm, Volker
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We briefly review the historical development of the ideas regarding the first supermassive black hole seeds, the physics of their formation and radiative feedback, recent theoretical and observational progress, and our outlook for the future.
description: Invited review, Astronomy & Geophysics, 6 pages, 6 figures, updated to reflect the printed version
Verzeichnis der mineralogischen, geologischen, urgeschichtlichen und hydrologischen Literatur von Württemberg, Hohenzollern und den angrenzenden Gebieten. [Lieferung] V [mit Register und Titel zu dem Verzeichnis der Literatur von 1901 bis 1905]
Creators: name: Unkn
Publisher: name: unkn
Year: 2021

description: Beilagen zu den Jahresheften des Vereins für Vaterländische Naturkunde in Württemberg
description: 1908, 5 [JVVNW 64, 1908]
title: Governance for the sustainable economy
title: institutional innovation from the bottom up?
titleType: Subtitle
Creators: name: Jacob, Klaus
name: Guske, Anna-Lena
name: Antoni-Komar, Irene
name: Funcke, Simon
name: Gruchmann, Tim
name: Kny, Josefa
name: Naber, Elias
name: Ruppert-Winkel, Chantal
name: Sauer, Philipp Christopher
name: Stumpf, Klara Helene
name: Volk, Rebekka
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: governance
subject: infrastructures
subject: innovation
subject: institutions
subject: networks
subject: supply chains
subject: sustainability
subject: sustainable economy
subject: transformation
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: A sustainable economy fulfills societal needs in a fundamentally different way to the current economic system. Improvements to the efficiency of existing technologies or practices appear insufficient for achieving sustainable development within the planetary boundaries. Disruptive, systemic and transformational changes appear necessary in order to replace existing technologies and practices to establish a sustainable economy. Such innovations often start out in niches; however, the scaling up and the ultimate replacement of current socio-technical systems requires governance to allow for the coordination of actors, the reorganization of socio-technical systems and the mobilization and allocation of resources. As governmental institutions are part of the current (non-sustainable) systems and thereby fail to provide coherent, integrated and transformative governance, we explore whether institutional innovation from non-state actors can step in to provide governance of transformation processes. Based on explorative qualitative case studies of networks in the food sector, city planning and reporting tools, we analyze the potential of bottom-up institutional innovations to coordinate actors in transformation processes.
Modularity of logarithmic parafermion vertex algebras
Creators: name: Auger, Jean
name: Creutzig, Thomas
name: Ridout, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The parafermionic cosets $C_k = \mathrm{Com} (H, L_k(\mathfrak{sl}_2) )$ are studied for negative admissible levels $k$, as are certain infinite-order simple current extensions $B_k$ of $C_k$. Under the assumption that the tensor theory considerations of Huang, Lepowsky and Zhang apply to $C_k$, all irreducible $C_k$- and $B_k$-modules are obtained from those of $L_k(\mathfrak{sl}_2)$, as are the Grothendieck fusion rules of these irreducible modules. Notably, there are only finitely many irreducible $B_k$-modules. The irreducible $C_k$- and $B_k$-characters are computed and the latter are shown, when supplemented by pseudotraces, to carry a finite-dimensional representation of the modular group. The natural conjecture then is that the $B_k$ are $C_2$-cofinite vertex operator algebras.
description: 28 pages; v2 31 pages: many clarifications and improvements, especially to the example in Sec. 4.3
Nachträge und Zusätze zur Literatur von 1901 bis 1905
Creators: name: Schütze, Ewald
Publisher: name: unkn
Year: 2021

description: Beilagen zu den Jahresheften des Vereins für Vaterländische Naturkunde in Württemberg
description: 1908, 5 [JVVNW 64, 1908]
Generalized Elliott-Yafet spin-relaxation time for arbitrary spin mixing
Creators: name: Vollmar, Svenja
name: Hilton, David J.
name: Schneider, Hans Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We extend our recent result for the spin-relaxation time due to acoustic electron-phonon scattering in degenerate bands with spin mixing [New J. Phys. 18, 023012 (2015)] to include interactions with optical phonons, and present a numerical evaluation of the spin-relaxation time for intraband hole-phonon scattering in the heavy-hole (HH) bands of bulk GaAs. Comparing our computed spin-relaxation times to the conventional Elliott-Yafet result quantitatively demonstrates that the latter underestimates the spin-relaxation time because it does not correctly describe how electron-phonon interactions change the (vector) spin expectation value of the single-particle states. We show that the conventional Elliott-Yafet spin relaxation time is a special case of our result for weak spin mixing.
Helping hand or centralizing tool? The politics of conditional grants in Australia, Canada, and the United States
Creators: name: Schnabel, Johanna
name: Dardanelli, Paolo
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: conditional grants
subject: Australia
subject: Canada
subject: United States
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: Conditional grant programs are widely used in federal systems to address the tension between decentralized policy provision and territorial equity, given constraints on constituent units' ability to raise revenues. While enhancing their financial capacity, conditional grants are often seen as reducing constituent units' policy autonomy. Against this backdrop, this article examines the actual impact conditional grants have on the capacity and autonomy of a constituent unit. We analyze key milestones in the genesis and evolution of conditional grant programs in education and healthcare in Australia, Canada, and the United States. We find that the impact of conditional grants primarily depends on constituent units' size, fiscal capacity, and distinctiveness. Conditional grants are most beneficial to smaller and/or fiscally weaker constituent units but highly distinctive units suffer the most significant autonomy losses. If they are not to exacerbate centralization, conditional grants programs thus need to be sensitive to the preferences of the more distinctive constituent units.
Time as an argument in Roman water law
Creators: name: Möller, Cosima
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Water rights
subject: Water usage
subject: Time units
subject: Servitutes
subject: Interdicta
subject: Roman law
subject: 300 Sozialwissenschaften::340 Recht::340 Recht

description: This article analyses the function of time in legal regulations of water use. It is discussed how time units are employed to specify the use of water through servitudes, enabling the involved parties an efficient distribution. In this context, it is examined how the jurists take different approaches when it comes to defining the terms of use and maintenance for a servitude and how the diverging conceptions are influenced by philosophical ideas. Moreover, the legal regulation for usage of multiple parties in irrigation communities is explored. Further, the article deals with the role of time for the formation and nullification of servitudes. The jurists apply different conceptions in deciding whether a servitude can be lost through non-use or created through acquisitive prescription and other means, which take the factor time into account. It becomes evident that the opinions of the jurists derive from philosophically influenced schools of legal thinking. Finally, the time intervals of possession are analysed, which are necessary for allowing judicial protection of water use through the praetor. In order to enforce an interdictum, solely a one-day use of the possessor is required. The conclusion highlights the connection between legal rules and archaeological evidence.
Knot traces and concordance
Creators: name: Miller, Allison N.
name: Piccirillo, Lisa
Publisher: name: arXiv
Year: 2017
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: We give a method for constructing many pairs of distinct knots $K_0$ and $K_1$ such that the two 4-manifolds obtained by attaching a 2-handle to $B^4$ along $K_i$ with framing zero are diffeomorphic. We use the d-invariants of Heegaard Floer homology to obstruct the smooth concordance of some of these $K_0$ and $K_1$, thereby disproving a conjecture of Abe in [Abe16]. As a consequence, we obtain a proof that there exist patterns $P$ in solid tori such that $P(K)$ is not always concordant to $P(U) \# K$ and yet whose action on the smooth concordance group is invertible.
description: 17 pages, 15 figures. This version of the paper has been accepted by the Journal of Topology for publication
Heat stress can change the competitive outcome between fungi: insights from a modelling approach
Creators: name: Wesener, Felix
name: Rillig, Matthias C.
name: Tietjen, Britta
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: fungal community
subject: induced stress defence
subject: mathematical model
subject: microbiology
subject: mycology
subject: PDE model
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::579 Mikroorganismen, Pilze, Algen

description: Under a changing climate, soil fungal communities will increasingly be subject to periods of heat stress. These periods can affect the performance of individual fungi and their competition for space and resources. Competition between fungi is strongly controlled by the exudation of inhibitory compounds, resulting in different competitive outcomes that range from overgrowth of the inferior competitor to a deadlock, where the competing fungi inhibit each other. As heat stress can alter the competitive outcome between fungi, the community composition can also change strongly. So far, a general understanding of the mechanisms that drive the competitive outcome between fungi under heat stress is still missing. However, this understanding is essential to assess important community functions, such as decomposition or mediation of plant nutrition, which strongly depend on the fungal community composition. Here, we used a partial differential equation (PDE) model simulating two fungal competitors in a two-dimensional space, to mechanistically explain the observed change of fungal competition under heat stress. The model describes mycelial growth, the production and secretion of antifungal compounds and the synthesis of heat shock proteins of interacting colonies. We found a heat stress-induced lag phase favouring the accumulation of antifungal compounds and the build-up of inhibitor fields. This led to a qualitative change of the competitive outcome, reducing the occurrence of overgrowth by two thirds. The changes in competitive outcome favoured slower growing species, which benefit more strongly from the additional time during a stress-induced lag to build up a defence or block territory that would otherwise be quickly claimed by faster competitors. Our work is an important step towards understanding how environmental changes may lead to qualitative changes in competitive outcomes. Our results show the importance of explicitly including species interactions into studies of climate change effects.
Diverse types of knowledge on a plate: a multi-perspective and multi-method approach for the transformation of urban food systems towards sustainable diets
Creators: name: López Cifuentes, Marta
name: Penker, Marianne
name: Kaufmann, Lisa
name: Wittmann, Fritz
name: Fiala, Valentin
name: Gugerell, Christina
name: Lauk, Christian
name: Krausmann, Fridolin
name: Eder, Michael
name: Freyer, Bernhard
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Scenario approach
subject: Transdisciplinary research
subject: Interdisciplinary research
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: Urbanization processes are accompanied by growing global challenges for food systems. Urban actors are increasingly striving to address these challenges through a focus on sustainable diets. However, transforming food systems towards more sustainable diets is challenging and it is unclear what the local scope of action might be. Co-production of knowledge between science and non-science is particularly useful for analysing context-specific solutions and promise to result in more robust socio-economic, political and technical solutions. Thus, this paper aims to integrate different types and sources of knowledge to understand urban food systems transformation towards a more sustainable diet in Vienna; and, second, to analyse and reflect on the difficulties and ways forward to integrate diverse actors’ perspectives, multiple methods and epistemologies. We created different future scenarios that illustrate the synergies and trade-offs of various bundles of measures and the interactions among single dimensions of sustainable diets. These scenarios show that there is plenty of scope for local action, but co-ordination across diverse groups, interests, and types of knowledge is necessary to overcome lock-ins.
Encouraged to Cheat? Federal Incentives and Career Concerns at the Sub-national Level as Determinants of Under-Reporting of COVID-19 Mortality in Russia
Creators: name: Kofanov, Dmitrii
name: Kozlov, Vladimir
name: Libman, Alexander
name: Zakharov, Nikita
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: COVID-19
subject: data manipulation
subject: authoritarian regimes
subject: incentives in federations
subject: Russia
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: This article investigates the determinants and consequences of manipulating COVID-19 statistics in an authoritarian federation using the Russian case. It abandons the interpretation of the authoritarian regime as a unitary actor and acknowledges the need to account for a complex interaction of various bureaucratic and political players to understand the spread and the logic of manipulation. Our estimation strategy takes advantage of a natural experiment where the onset of the pandemic adjourned the national referendum enabling new presidential terms for Putin. To implement the rescheduled referendum, Putin needed sub-national elites to manufacture favourable COVID-19 statistics to convince the public that the pandemic was under control. While virtually all regions engaged in data manipulation, there was a substantial variation in the degree of misreporting. A third of this variation can be explained by an asynchronous schedule of regional governors’ elections, winning which depends almost exclusively on support from the federal authorities.
Extreme events in Fitzhugh-Nagumo oscillators coupled with two time delays
Creators: name: Saha, Arindam
name: Feudel, Ulrike
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study two identical FitzHugh-Nagumo oscillators which are coupled with one or two different time delays. If only a single delay coupling is used, the length of the delay determines whether the synchronization manifold is transversally stable or unstable, exhibiting mixed mode or chaotic oscillations in which the small amplitude oscillations are always in-phase but the large amplitude oscillations are in-phase or out-of-phase respectively. For two delays we find an intricate dynamics which comprises an irregular alteration of small amplitude oscillations, in-phase and out-of-phase large amplitude oscillations, also called events. This transient chaotic dynamics is sandwiched between a bubbling transition and a blowout bifurcation.
description: 11 pages, 12 figures
El criterio de imputación para fundamentar la responsabilidad del Estado por privación injusta de la libertad (análisis de la jurisprudencia del Consejo de Estado 1991 – 2024)
Creators: name: Vásquez Suárez, Yeni Paola
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Responsabiliad extracontractual - Legislación
subject: Procedimiento penal - Colombia
subject: Sentencias - Aspectos jurídicos
subject: Privación de la libertad
subject: Daño especial
subject: Falla en el servicio
subject: Medida de aseguramiento

description: El Consejo de Estado no ha tenido una postura pacífica sobre la responsabilidad patrimonial extracontractual del Estado en casos de privación de la libertad; la presente obra evidencia lo anterior y el tránsito de la jurisprudencia por el cambio normativo de los códigos de procedimiento penal, para luego proponer que el régimen de imputación sea el objetivo, en concreto el daño especial.
description: The Council of State has not had a peaceful position on the State's extracontractual patrimonial responsibility in cases of deprivation of liberty; this work evidences the above and the transition of the jurisprudence through the normative change of the criminal procedure codes, to then propose that the imputation regime be the objective, specifically the special damage.
Separation of pulsar signals from noise with supervised machine learning algorithms
Creators: name: Bethapudi, Suryarao
name: Desai, Shantanu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We evaluate the performance of four different machine learning (ML) algorithms: an Artificial Neural Network Multi-Layer Perceptron (ANN MLP ), Adaboost, Gradient Boosting Classifier (GBC), XGBoost, for the separation of pulsars from radio frequency interference (RFI) and other sources of noise, using a dataset obtained from the post-processing of a pulsar search pi peline. This dataset was previously used for cross-validation of the SPINN-based machine learning engine, used for the reprocessing of HTRU-S survey data arXiv:1406.3627. We have used Synthetic Minority Over-sampling Technique (SMOTE) to deal with high class imbalance in the dataset. We report a variety of quality scores from all four of these algorithms on both the non-SMOTE and SMOTE datasets. For all the above ML methods, we report high accuracy and G-mean in both the non-SMOTE and SMOTE cases. We study the feature importances using Adaboost, GBC, and XGBoost and also from the minimum Redundancy Maximum Relevance approach to report algorithm-agnostic feature ranking. From these methods, we find that the signal to noise of the folded profile to be the best feature. We find that all the ML algorithms report FPRs about an order of magnitude lower than the corresponding FPRs obtained in arXiv:1406.3627, for the same recall value.
description: 14 pages, 2 figures. Accepted for publication in Astronomy and Computing