cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Anomalous transverse response of Co$_2$MnGa and universality of the room-temperature $α^A_{ij}/σ^A_{ij}$ ratio across topological magnets
Creators: name: Xu, Liangcai
name: Li, Xiaokang
name: Ding, Linchao
name: Chen, Taishi
name: Sakai, Akito
name: Fauqué, Benoît
name: Nakatsuji, Satoru
name: Zhu, Zengwei
name: Behnia, Kamran
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The off-diagonal (electric, thermal and thermoelectric) transport coefficients of a solid can acquire an anomalous component due to the non-trivial topology of the Bloch waves. We present a study of the anomalous Hall (AHE), Nernst (ANE) and thermal Hall effects (ATHE) in the Heusler Weyl ferromagnet Co$_2$MnGa. The Anomalous Wiedemann-Franz law, linking electric and thermal responses, was found to be valid over the whole temperature window. This indicates that the AHE has an intrinsic origin and the Berry spectrum is smooth in the immediate vicinity of the Fermi level. From the ANE data, we extract the magnitude and temperature dependence of $α^A_{ij}$ and put under scrutiny the $α^A_{ij}/σ^A_{ij}$ ratio, which approaches k$_B$/e at room temperature. We show that in various topological magnets the room-temperature magnitude of this ratio is a sizeable fraction of k$_B$/e and argue that the two anomalous transverse coefficients depend on universal constants, the Berry curvature averaged over a window set by either the Fermi wavelength (for Hall) or the de Broglie thermal length (for Nernst). Since the ratio of the latter two is close to unity at room temperature, such a universal scaling finds a natural explanation in the intrinsic picture of anomalous transverse coefficients.
description: 5 pages, 4 figures, supplemental material included
Moquiniastrum barrosoae G. Sancho, comb. nov.
Creators: name: Sancho, Gisela
name: Funk, Ki. A.
name: Roque, Nádia
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Moquiniastrum
Moquiniastrum barrosoae

description: 3. Moquiniastrum barrosoae (Cabrera) G. Sancho, comb. nov.
 Basionym: Gochnatia barrosoae Cabrera (1950: 46), as G. barrosii. Type:― BRAZIL. Minas Gerais: Ituitaba, 28 July 1948, A. Macedo 1138 (holotype LP!, isotypes G!, SP!, US!).
description: Published as part of Sancho, Gisela, Funk, Ki. A. & Roque, Nádia, 2013, Moquiniastrum (Gochnatieae, Asteraceae): disentangling the paraphyletic Gochnatia, pp. 26-34 in Phytotaxa 147 (1) on page 29, DOI: 10.11646/phytotaxa.147.1.3, http://zenodo.org/record/5100233
Dispersive estimates, blow-up and failure of Strichartz estimates for the Schrödinger equation with slowly decaying initial data
Creators: name: Mandel, Rainer
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The initial value problem for the homogeneous Schrödinger equation is investigated for radially symmetric initial data with slow decay rates and not too wild oscillations. Our global wellposedness results apply to initial data for which Strichartz estimates fail.
title: The Role of Loss Functions in Regression Problems
Creators: name: Mühlemann, Anja
Publisher: name: Universität Bern
Year: 2021
Subjects: subject: 510 Mathematics

description: In regression analysis, the goal is to capture the influence of one or more explanatory
variables X1, . . . ,Xm on a response variable Y in terms of a regression function
g : Rm -> R. An estimate ĝ of g is then found or evaluated in terms of its ability to predict
a prespecified statistical functional T of the conditional distribution L(Y |X1, . . . ,Xm).
This is done with the help of a loss function that penalizes estimates that perform poorly
in predicting T(L(Y |X1, . . . ,Xm)). More precisely, it is done by using loss functions that
are consistent for T.
Clearly, the outcome of the evaluation or estimation strongly depends on the functional
T. However, when we focus on a specific functional T a vast collection of suitable loss
functions may be available and the result can still be sensitive to the choice of loss
function.
There are several viable solution strategies to approach this issue. We can, for instance,
impose additional properties on the loss function or the resulting estimate so that only
one of the possible loss functions remains reasonable. In this doctoral thesis we adopt
another approach. The underlying idea is that we would naturally prefer an estimate ĝ
that is optimal with respect to several consistent loss functions for T, as then the choice
of loss function seems to impact the outcome less severely.
In Chapter 1, we consider the nonparametric isotonic regression problem. We show that
this regression problem is special in that for identifiable functionals T, solutions which
are simultaneously optimal with respect to an entire class of consistent losses exist and
can be characterized. There are, however, several functionals of interest that are not
identifiable. The expected shortfall is just one prominent example. However, some of
those functionals can be obtained as a function of a vector-valued elicitable functional.
In the second Chapter, we investigate when simultaneous optimality with respect to a
class of consistent losses holds for these functionals and introduce the solution to the
isotonic regression problem for a specific loss in the case where simultaneous optimality
is not fulfilled.
In parametric regression, on the other hand, different consistent loss functions often yield
different parameter estimates under misspecification. This motivates to consider the set
of these parameters as a way to measure misspecification. We introduce this approach
in Chapter 3 and show how the set of these model parameters can be calculated on the
population and on the sample level for an isotonic regression function g.
title: A Maturity Model for Assessing the Digitalization of Public Health Agencies
title: Development and Evaluation
titleType: Subtitle
Creators: name: Doctor, Eileen
name: Eymann, Torsten
name: Fürstenau, Daniel
name: Gersch, Martin
name: Hall, Kristina
name: Kauffmann, Anna Lina
name: Schulte-Althoff, Matthias
name: Schlieter, Hannes
name: Stark, Jeannette
name: Wyrtki, Katrin
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Digital maturity
subject: Digitalization
subject: Public health offices
subject: Maturity models
subject: 300 Sozialwissenschaften::330 Wirtschaft::330 Wirtschaft

description: Requests for a coordinated response during the COVID-19 pandemic revealed the limitations of locally-operating public health agencies (PHAs) and have resulted in a growing interest in their digitalization. However, digitalizing PHAs – i.e., transforming them technically and organizationally – toward the needs of both employees and citizens is challenging, especially in federally-managed local government settings. This paper reports on a project that develops and evaluates a continuous (vs. a staged) maturity model, the PHAMM, for digitalizing PHAs as a cornerstone of a digitally resilient public health system in the future. The model supports a coordinated approach to formulating a vision and structuring the steps toward it, engaging employees along the transformation journey necessary for a federally-managed field. Further, it is now being used to allocate substantial national funds to foster digitalization. By developing the model in a coordinated approach and using it for distributing federal resources, this work expands the potential usage cases for maturity models. The authors conclude with lessons learned and discuss how the model can incentivize local digitalization in federal fields.
Thermal Expansion in YbGaGe
Creators: name: Bobev, Svilen
name: Williams, Darrick J.
name: Thompson, J. D.
name: Sarrao, J. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal expansion and magnetic susceptibility measurements as a function of temperature are reported for YbGaGe. Despite the fact that this material has been claimed to show zero thermal expansion over a wide temperature range, we observe thermal expansion typical of metals and Pauli paramagnetic behavior, which perhaps indicates strong sample dependence in this system.
description: 7 pages, 3 figures, submitted to Solid State Communications 05/04/04
Minotaurella banyulensis
Creators: name: Thibaud, Jean-Marc
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Poduromorpha
Neanuridae
Minotaurella
Minotaurella banyulensis

description: Minotaurella banyulensis (Denis, 1947)
Anurida banyulensis Denis, 1947c: 9.
Minotaurella banyulensis – Weiner 1999: 376.
DISTRIBUTION. — Pyrénées-Orientales. Vallée de la Bayorie et autour de la Mare Reig près de Banyuls-sur-Mer (Denis 1947c).
TAXONOMIE. — Weiner 1999.
description: Published as part of Thibaud, Jean-Marc, 2017, Catalogue des collemboles de France, pp. 297-436 in Zoosystema 39 (3) on page 329, DOI: 10.5252/z2017n3a1, http://zenodo.org/record/5496272
Development of Iron‐Based Single Atom Materials for General and Efficient Synthesis of Amines
Creators: name: Ma, Zhuang
name: Kuloor, Chakreshwara
name: Kreyenschulte, Carsten
name: Bartling, Stephan
name: Malina, Ondrej
name: Haumann, Michael
name: Menezes, Prashanth W.
name: Zbořil, Radek
name: Beller, Matthias
name: Jagadeesh, Rajenahally V.
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: iron catalysis
subject: single atoms
subject: reductive amination
subject: carbonyl compounds
subject: amines
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Earth abundant metal‐based heterogeneous catalysts with highly active and at the same time stable isolated metal sites constitute a key factor for the advancement of sustainable and cost‐effective chemical synthesis. In particular, the development of more practical, and durable iron‐based materials is of central interest for organic synthesis, especially for the preparation of chemical products related to life science applications. Here, we report the preparation of Fe‐single atom catalysts (Fe‐SACs) entrapped in N‐doped mesoporous carbon support with unprecedented potential in the preparation of different kinds of amines, which represent privileged class of organic compounds and find increasing application in daily life. The optimal Fe‐SACs allow for the reductive amination of a broad range of aldehydes and ketones with ammonia and amines to produce diverse primary, secondary, and tertiary amines including N‐methylated products as well as drugs, agrochemicals, and other biomolecules (amino acid esters and amides) utilizing green hydrogen.
Affluence and Interpersonal Trust
Creators: name: Tosone, Alexandra
Publisher: name: Georgia State University
Year: 2023

description:
This study explores the interplay between affluence and interpersonal trust in the United States. While existing research often focuses on the impoverished, this investigation shifts the lens to the affluent, shedding light on how affluence affects interpersonal trust dynamics.


Using qualitative methods, we conducted 15 in-depth interviews with affluent individuals and their family members. Three key findings emerged:


Trust Discrepancy: Participants claimed to trust others, but their behaviors suggested hesitancy in trust-dependent activities like sharing secrets or loaning money.


Affluent Upbringing and Lower Trust: Those raised in affluent households reported lower trust levels compared to others.


Reluctance to Discuss Finances: Affluent individuals hesitated to discuss financial matters within their families, possibly linked to economic inequality implications.


In summary, affluence appears to negatively impact interpersonal trust, extending beyond personal relationships to societal consequences. This research informs discussions on income inequality by shifting the focus to the accountability of the affluent and offers insights into the affluent's experiences and behaviors. Understanding these dynamics can guide policies and interventions toward a more equitable and trusting society.
Disinhibition enables vocal repertoire expansion after a critical period
Creators: name: Heim, Fabian
name: Mendoza, Ezequiel
name: Koparkar, Avani
name: Vallentin, Daniela
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: Birdsong
subject: Neural circuits
subject: vocal repertoire
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: The efficiency of motor skill acquisition is age-dependent, making it increasingly challenging to learn complex manoeuvres later in life. Zebra finches, for instance, acquire a complex vocal motor programme during a developmental critical period after which the learned song is essentially impervious to modification. Although inhibitory interneurons are implicated in critical period closure, it is unclear whether manipulating them can reopen heightened motor plasticity windows. Using pharmacology and a cell-type specific optogenetic approach, we manipulated inhibitory neuron activity in a premotor area of adult zebra finches beyond their critical period. When exposed to auditory stimulation in the form of novel songs, manipulated birds added new vocal syllables to their stable song sequence. By lifting inhibition in a premotor area during sensory experience, we reintroduced vocal plasticity, promoting an expansion of the syllable repertoire without compromising pre-existing song production. Our findings provide insights into motor skill learning capacities, offer potential for motor recovery after injury, and suggest avenues for treating neurodevelopmental disorders involving inhibitory dysfunctions.
Field- and pressure-induced magnetic quantum phase transitions in TlCuCl_3
Creators: name: Matsumoto, M.
name: Normand, B.
name: Rice, T. M.
name: Sigrist, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Thallium copper chloride is a quantum spin liquid of S = 1/2 Cu^2+ dimers. Interdimer superexchange interactions give a three-dimensional magnon dispersion and a spin gap significantly smaller than the dimer coupling. This gap is closed by an applied hydrostatic pressure of approximately 2kbar or by a magnetic field of 5.6T, offering a unique opportunity to explore the both types of quantum phase transition and their associated critical phenomena. We use a bond-operator formulation to obtain a continuous description of all disordered and ordered phases, and thus of the transitions separating these. Both pressure- and field-induced transitions may be considered as the Bose-Einstein condensation of triplet magnon excitations, and the respective phases of staggered magnetic order as linear combinations of dimer singlet and triplet modes. We focus on the evolution with applied pressure and field of the magnetic excitations in each phase, and in particular on the gapless (Goldstone) modes in the ordered regimes which correspond to phase fluctuations of the ordered moment. The bond-operator description yields a good account of the magnetization curves and of magnon dispersion relations observed by inelastic neutron scattering under applied fields, and a variety of experimental predictions for pressure-dependent measurements.
description: 20 pages, 17 figures
A New Implementation of the Region of Interest Strategy for the ATLAS Second Level Trigger
Creators: name: Boisvert, V.
name: Armstrong, S.
name: Baines, J.
name: Brandt, S.
name: Elsing, M.
name: George, S.
name: Li, W.
name: Mello, A. G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Among the many challenges presented by the future ATLAS detector at the LHC are the high data taking rate and volume and the derivation of a rapid trigger decision with limited resources. To address this challenge within the ATLAS second level trigger system, a Region-of-Interest mechanism has been adopted which dramatically reduces the relevant fiducial volume necessary to be readout and processed to small regions guided by the hardware-based first level trigger. Software has been developed to allow fast translation between arbitrary geometric regions and identifiers of small collections of the event data. This facilitates on-demand data retrieval and collection building. The system is optimized to minimize the amount of data transferred and unnecessary building of complex objects. Details of the design and implementation are presented along with preliminary performance results.
description: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 6 pages, LaTeX, 5 eps figures. PSN TUGT008
Inferring the coronal flaring patterns in AGN from reverberation maps
Creators: name: Goyder, R.
name: Lasenby, A. N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The relativistically broadened iron K-alpha line at 6.4 keV observed in the Seyfert 1 galaxy MCG-6-30-15 has provided a probe of the strong-gravity environment near a black hole, in particular suggesting that it is rapidly spinning. An important variable in such analyses is the geometry of the illuminating source. We present a new technique which constrains this geometry based on the spectral line shape, based on a model of discrete, point-like flaring regions in the X-ray corona. We apply it to simulated reverberation maps and give examples of successful reconstructions of complex coronal flaring patterns. For time-averaged spectral lines the problem is highly degenerate, and so its inversion more challenging. We quantify this degeneracy and give a measure of the spatial accuracy of the method in this case, before checking that it is consistent with the existing picture of MCG-6-30-15 by applying it to recent data from XMM-Newton.
description: Submitted to MNRAS. A version with higher-resolution figures is available for download at http://www.mrao.cam.ac.uk/~rg200 as are colour versions of some figures
Pushing Point spread function reconstruction to the next level. Application to SPHERE/ZIMPOL
Creators: name: Beltramo-Martin, Olivier
name: Marasco, Antonino
name: Fusco, Thierry
name: Massari, Davide
name: Milli, Julien
name: Fiorentino, Giuliana
name: Neichel, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Point spread function (PSF) reconstruction (PSF-R) is a well established technique to determine reliably and accurately the PSF from Adaptive Optics (AO) control loop data. We have successfully applied this technique to improve the precision on photometry and astrometry to observation of NGC6121 obtained with SPHERE/ZIMPOL as it will be presented in a forthcoming letter. Firstly, we present the methodology we followed to reconstruct the PSF combining pupil-plane and focal-plane measurements using using our PSF-R method PRIME (Beltramo-Martin et al. 2019), with upgrade of both the model and best-fitting steps compared to previous papers. Secondly, we highlight that PRIME allows to maintain the PSF fitting residual below 0.2% over 2 hours of observation and using only 30 s of AO telemetry, which may have important consequences for telemetry storage for PSF-R purpose on future 30-40 m class telescopes. Finally, we deploy PRIME in a more realistic regime using faint stars so as to identify the precision needed on the initial guess parameters to ensure the convergence towards the optimal solution.
Multilevel Parareal Algorithm with Averaging for Oscillatory Problems
Creators: name: Rosemeier, Juliane
name: Haut, Terry
name: Wingate, Beth
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: time-stepping
subject: multilevel method
subject: Parareal method
subject: averaging
subject: parallel-in-time
subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik

description: The present study is an extension of the work done by Peddle, Haut, and Wingate [SIAM J. Sci. Comput., 41 (2019), pp. A3476–A3497] and Haut and Wingate [SIAM J. Sci. Comput., 36 (2014), pp. A693–A713], where a two-level Parareal method with mapping and averaging is examined. The method proposed in this paper is a multilevel Parareal method with arbitrarily many levels, which is not restricted to the two-level case. We give an asymptotic error estimate which reduces to the two-level estimate for the case when only two levels are considered. Introducing more than two levels has important consequences for the averaging procedure, as we choose separate averaging windows for each of the different levels, which is an additional new feature of the present study. The different averaging windows make the proposed method especially appropriate for nonlinear multiscale problems, because we can introduce a level for each intrinsic scale of the problem and adapt the averaging procedure such that we reproduce the behavior of the model on the particular scale resolved by the level. The method is applied to nonlinear differential equations. The nonlinearities can generate a range of frequencies in the problem. The computational cost of the new method is investigated and studied on several examples.
Moquiniastrum blanchetianum G. Sancho, comb. nov.
Creators: name: Sancho, Gisela
name: Funk, Ki. A.
name: Roque, Nádia
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Moquiniastrum
Moquiniastrum blanchetianum

description: 4. Moquiniastrum blanchetianum (DC.) G. Sancho, comb. nov.
 Basionym: Baccharis blanchetiana Candolle (1838: 281). Type:― BRAZIL. “montibus Jacobinae, propè Bahiam”, no date, J . S Blanchet 2569 (holotype G-DC!, isotypes F!, two sheets K!, SP!)
description: Published as part of Sancho, Gisela, Funk, Ki. A. & Roque, Nádia, 2013, Moquiniastrum (Gochnatieae, Asteraceae): disentangling the paraphyletic Gochnatia, pp. 26-34 in Phytotaxa 147 (1) on page 29, DOI: 10.11646/phytotaxa.147.1.3, http://zenodo.org/record/5100233
Parallelizing the MARS15 Code with MPI for Shielding Applications
Creators: name: Kostin, M. A.
name: Mokhov, N. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The MARS15 Monte Carlo code capabilities to deal with time-consuming deep penetration shielding problems and other computationally tough tasks in accelerator, detector and shielding applications, have been enhanced by a parallel processing option. It has been developed, implemented and tested on the Fermilab Accelerator Division Linux cluster and network of Sun workstations. The code uses MPI. It is scalable and demonstrates good performance. The general architecture of the code, specific uses of message passing, and effects of a scheduling on the performance and fault tolerance are described.
description: 5 pages, 5 figures. Presented paper at the 10th International Conference on Radiation Shielding, Funchal (Madeira), Portugal, May 9-14, 2004. This work was supported by the Universities Research Association, Inc., under contract DE-AC02-76CH03000 with the U.S. Department of Energy
Pongeia asturianensis Najt & Weiner 2002
Creators: name: Thibaud, Jean-Marc
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Poduromorpha
Neanuridae
Pongeia
Pongeia asturianensis

description: Pongeia asturianensis Najt & Weiner, 2002 *
Pongeia asturianensis Najt & Weiner, 2002: 338.
DISTRIBUTION. — Nord. Usine des Asturies à Auby (Najt & Weiner 2002).
description: Published as part of Thibaud, Jean-Marc, 2017, Catalogue des collemboles de France, pp. 297-436 in Zoosystema 39 (3) on page 329, DOI: 10.5252/z2017n3a1, http://zenodo.org/record/5496272
Quelques éléments de combinatoire des matrices de $SL_{2}(\mathbb{Z})$
Creators: name: Mabilat, Flavien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A Theorem of V.Ovsienko characterizes sequences of positive integers $(a_1,a_2,\ldots,a_n)$ such that the $(2\times2)$-matrix $\begin{pmatrix} a_n & -1 \\ 1 & 0 \end{pmatrix}\cdots \begin{pmatrix} a_1 & -1 \\ 1 & 0 \end{pmatrix}$ is equal to $\pm Id$. In this paper, we study this equation when we replace $\pm Id$ by $\pm M$. In particular, we give a combinatorial description of the solutions of this equation in terms of dissections of convex polygons in the cases $M=\begin{pmatrix} 0 & -1 \\ 1 & 0 \end{pmatrix}$ and $M=\begin{pmatrix} 1 & 1 \\ 0 & 1 \end{pmatrix}$.
description: in French
Moquiniastrum bolivianum G. Sancho 2013, comb. nov.
Creators: name: Sancho, Gisela
name: Funk, Ki. A.
name: Roque, Nádia
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Moquiniastrum
Moquiniastrum bolivianum

description: 5. Moquiniastrum bolivianum (Rusby) G. Sancho, comb. nov.
 Basionym: Moquinia boliviana Rusby (1907: 399). Type:― BOLIVIA. No date, M . Bang 2252 (holotype NY, isotypes G!, LP!, MO!).
 Homotypic synonym: Gochnatia rusbyana Cabrera (1950: 41).
description: Published as part of Sancho, Gisela, Funk, Ki. A. & Roque, Nádia, 2013, Moquiniastrum (Gochnatieae, Asteraceae): disentangling the paraphyletic Gochnatia, pp. 26-34 in Phytotaxa 147 (1) on page 30, DOI: 10.11646/phytotaxa.147.1.3, http://zenodo.org/record/5100233
Dynamics in a cluster under the influence of intense femtosecond hard x-ray pulses
Creators: name: Jurek, Zoltan
name: Faigel, Gyula
name: Tegze, Miklos
Publisher: name: arXiv
Year: 2003
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: In this paper we examine the behavior of small cluster of atoms in a short (10-50 fs) very intense hard x-ray (10 keV) pulse. We use numerical modeling based on the non-relativistic classical equation of motion. Quantum processes are taken into account by the respective cross sections. We show that there is a Coulomb explosion, which has a different dynamics than one finds in classical laser driven cluster explosions. We discuss the consequences of our results to single molecule imaging by the free electron laser pulses.
description: 14 pages, 13 figures
Translating 'practice-into-evidence': Why multimorbidity research needs ethnography.
Creators: name: Swinglehurst, Deborah
Publisher: name: Zenodo
Year: 2024

description: Ethnography is small scale observational research conducted in naturalistic ‘everyday’ settings which seeks to describe, illuminate and interpret everyday phenomena. With its disciplinary roots in anthropology, ethnography remains underexploited in healthcare research but is particularly valuable as a way of exploring complex issues and offering insights that can inform efforts to improve the quality and safety of care.

In her talk, Deborah Swinglehurst began by introducing ethnography as an orientation to research, explaining what it was, why it was valuable, and what kinds of methods might be employed in an ethnographic enquiry.

Drawing on examples of recently completed and ongoing research projects conducted within her team, she highlighted the potential of ethnography to support new ways of thinking about the nature of some of our most complex contemporary healthcare challenges, such as multimorbidity and polypharmacy.
Atomistic spin dynamics simulations of magnonic spin Seebeck and spin Nernst effects in altermagnets
Creators: name: Weißenhofer, Markus
name: Marmodoro, Alberto
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: Altermagnetism
subject: Magnetotransport
subject: Magnons
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Magnon band structures in altermagnets are characterized by an energy splitting of modes with opposite chirality, even in the absence of applied external fields and relativistic effects, because of an anisotropy in the Heisenberg exchange interactions. We perform quantitative atomistic spin dynamics simulations based on ab initio electronic structure calculations on rutile RuO2, a prototypical “d-wave” altermagnet, to study magnon currents generated by thermal gradients. We report substantial spin Seebeck and spin Nernst effects, i.e., longitudinal or transverse spin currents, depending on the propagation direction of the magnons with respect to the crystal, together with a finite spin accumulation associated with nonlinearities in the temperature profile. Our findings are consistent with the altermagnetic spin-group symmetry, as well as predictions from linear spin-wave theory and semiclassical Boltzmann transport theory.
Additional file 2 of Pilot trial of The Living Well Toolkit: qualitative analysis and implications for refinement and future implementation
Creators: name: Mudge, Suzie
name: Sezier, Ann
name: Payne, Deborah
name: Smith, Greta
name: Kayes, Nicola
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Computational Biology

description: Additional file 2. Cliniciansâ€™ Focus Group/Interview Guide.
Bericht zur Tagung "Material Matters in Times of Crisis Capitalism. Transnational feminist and decolonial perspectives"
Creators: name: Gutiérrez-Rodríguez, Encarnación
name: Türkmen, Ceren
name: Garbe, Sebastian
Publisher: name: KULT_online
Year: 2015

description: KULT_online, Nr. 41 (2015): KULT_online 41 (2015)
A Closer Look at Lightweight Graph Reordering
Creators: name: Faldu, Priyank
name: Diamond, Jeff
name: Grot, Boris
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Graph analytics power a range of applications in areas as diverse as finance, networking and business logistics. A common property of graphs used in the domain of graph analytics is a power-law distribution of vertex connectivity, wherein a small number of vertices are responsible for a high fraction of all connections in the graph. These richly-connected (hot) vertices inherently exhibit high reuse. However, their sparse distribution in memory leads to a severe underutilization of on-chip cache capacity. Prior works have proposed lightweight skew-aware vertex reordering that places hot vertices adjacent to each other in memory, reducing the cache footprint of hot vertices. However, in doing so, they may inadvertently destroy the inherent community structure within the graph, which may negate the performance gains achieved from the reduced footprint of hot vertices. In this work, we study existing reordering techniques and demonstrate the inherent tension between reducing the cache footprint of hot vertices and preserving original graph structure. We quantify the potential performance loss due to disruption in graph structure for different graph datasets. We further show that reordering techniques that employ fine-grain reordering significantly increase misses in the higher level caches, even when they reduce misses in the last-level cache. To overcome the limitations of existing reordering techniques, we propose Degree-Based Grouping (DBG), a novel lightweight reordering technique that employs a coarse-grain reordering to largely preserve graph structure while reducing the cache footprint of hot vertices. Our evaluation on 40 combinations of various graph applications and datasets shows that, compared to a baseline with no reordering, DBG yields an average application speed-up of 16.8% vs 11.6% for the best-performing existing lightweight technique.
description: Fixed ill-formatted page 6 from the earlier version. No content changes
How black holes get their kicks: Gravitational radiation recoil revisited
Creators: name: Favata, Marc
name: Hughes, Scott A.
name: Holz, Daniel E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational waves from the coalescence of binary black holes carry away linear momentum, causing center of mass recoil. This "radiation rocket" effect has important implications for systems with escape speeds of order the recoil velocity. We revisit this problem using black hole perturbation theory, treating the binary as a test mass spiraling into a spinning hole. For extreme mass ratios (q = m1/m2 << 1) we compute the recoil for the slow inspiral epoch of binary coalescence very accurately; these results can be extrapolated to q ~ 0.4 with modest accuracy. Although the recoil from the final plunge contributes significantly to the final recoil, we are only able to make crude estimates of its magnitude. We find that the recoil can easily reach ~ 100-200 km/s, but most likely does not exceed ~ 500 km/s. Though much lower than previous estimates, this recoil is large enough to have important astrophysical consequences. These include the ejection of black holes from globular clusters, dwarf galaxies, and high-redshift dark matter halos.
description: 4 pages, 2 figures, emulateapj style; minor changes made; accepted to ApJ Letters
title: Flexibility properties and homology of Gromov-Vaserstein fibres
Creators: name: De Vito, Giorgio
Publisher: name: Universität Bern
Year: 2021
Subjects: subject: 510 Mathematics

description: In the present work we prove that an important class of affine algebraic varieties, called Gromov-Vaserstein fibres, enjoys the (algebraic) volume density property. Also, we compute the homology groups of these varieties.
Mutations in CLCN6 as a Novel Genetic Cause of Neuronal Ceroid Lipofuscinosis in Patients and a Murine Model
Creators: name: He, Hailan
name: Cao, Xiaoshuang
name: He, Fang
name: Zhang, Wen
name: Wang, Xiaole
name: Peng, Pan
name: Xie, Changning
name: Yin, Fei
name: Li, Dengfeng
name: Li, Jiada
name: Wang, Minghui
name: Klüssendorf, Malte
name: Jentsch, Thomas J.
name: Stauber, Tobias
name: Peng, Jing
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: Mutations
subject: CLCN6
subject: Novel Genetic Cause
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Objective The aim of this study was to explore the pathogenesis of CLCN6-related disease and to assess whether its Cl−/H+-exchange activity is crucial for the biological role of ClC-6. Methods We performed whole-exome sequencing on a girl with development delay, intractable epilepsy, behavioral abnormities, retinal dysfunction, progressive brain atrophy, suggestive of neuronal ceroid lipofuscinoses (NCLs). We generated and analyzed the first knock-in mouse model of a patient variant (p.E200A) and compared it with a Clcn6−/− mouse model. Additional functional tests were performed with heterologous expression of mutant ClC-6. Results We identified a de novo heterozygous p.E200A variant in the proband. Expression of disease-causing ClC-6E200A or ClC-6Y553C mutants blocked autophagic flux and activated transcription factors EB (TFEB) and E3 (TFE3), leading to autophagic vesicle and cholesterol accumulation. Such alterations were absent with a transport-deficient ClC-6E267A mutant. Clcn6E200A/+ mice developed severe neurodegeneration with typical features of NCLs. Mutant ClC-6E200A, but not loss of ClC-6 in Clcn6−/− mice, increased lysosomal biogenesis by suppressing mTORC1-TFEB signaling, blocked autophagic flux through impairing lysosomal function, and increased apoptosis. Carbohydrate and lipid deposits accumulated in Clcn6E200A/+ brain, while only lipid storage was found in Clcn6−/− brain. Lysosome dysfunction, autophagy defects, and gliosis were early pathogenic events preceding neuron loss. Interpretation CLCN6 is a novel genetic cause of NCLs, highlighting the importance of considering CLCN6 mutations in the diagnostic workup for molecularly undefined forms of NCLs. Uncoupling of Cl− transport from H+ countertransport in the E200A mutant has a dominant effect on the autophagic/lysosomal pathway. ANN NEUROL 2024;96:608–624
Unconditional applicability of Lehmer's measure to the two-term Machin-like formula for $π$
Creators: name: Abrarov, Sanjar M.
name: Siddiqui, Rehan
name: Jagpal, Rajinder K.
name: Quine, Brendan M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 11Y60

description: Lehmer defined a measure $$ μ=\sum\limits_{j=1}^J\frac{1}{\log_{10}\left(\left|β_j\right|\right)}, $$ where the $β_j$ may be either integers or rational numbers in a Machin-like formula for $π$. When the $β_j$ are integers, Lehmer's measure can be used to determine the computational efficiency of the given Machin-like formula for $π$. However, because the computations are complicated, it is unclear if Lehmer's measure applies when one or more of the $β_j$ are rational. In this article, we develop a new algorithm for a two-term Machin-like formula for $π$ as an example of the unconditional applicability of Lehmer's measure. This approach does not involve any irrational numbers and may allow calculating $π$ rapidly by the Newton$-$Raphson iteration method for the tangent function.
description: 25 pages
Long-term optical/infrared variability in the quiescent X-ray transient V404 Cyg
Creators: name: Zurita, C.
name: Casares, J.
name: Hynes, R. I.
name: Shahbaz, T.
name: Charles, P. A.
name: Pavlenko, E. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of optical and infrared photometry of the quiescent X-ray transient V404 Cyg during the period 1992-2003. The ellipsoidal modulations extracted from the most complete databases (years 1992, 1998 and 2001) show unequal maxima and minima with relative strength varying from year to year although their peak to peak amplitudes remain roughly constant at 0.24+-0.01 magnitudes. Fast optical variations superimposed on the secondary star's double-humped ellipsoidal modulation were detected every year with a mean amplitude of ~0.07 mags. We have not found significant changes in the activity during this decade which indicates that this variability is probably not connected to the 1989 outburst. We have found periodicities in the 1998 and 2001 data near the 6 hr quasi-periodicity observed in 1992, although we interpret it as consequence of the appearance of a flare event almost every night. Significant variability is also present in the I and near infrared (J and K_short) bands and this decreases slightly or remains approximately constant at longer wavelengths. A cross correlation analysis shows that both the R and I emission are simultaneous down to 40 s.
description: 13 pages, 11 figures; accepted for publication in MNRAS
Transport of Neutral Amino Acids in the Jejunum of Pigs with Special Consideration of L-Methionine
Creators: name: Schermuly, Isabel I.
name: Romanet, Stella
name: Patra, Amlan K.
name: Mastrototaro, Lucia
name: Lemme, Andreas
name: Pieper, Robert
name: Zentek, Jürgen
name: Aschenbach, Jörg R.
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: amino acid interaction
subject: methionine supplementation
subject: piglets
subject: intestinal absorption
subject: intestinal inflammation
subject: Ussing chamber
subject: angiotensin-converting enzyme II
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::636 Viehwirtschaft

description: Methionine (Met) is a popular nutritional supplement in humans and animals. It is routinely supplemented to pigs as L-Met, DL-Met, or DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA). Methods: We investigated the effect of these Met supplements on jejunal amino acid (AA) transport in male castrated Piétrain × Danbred pigs, also including a non-supplemented group. The mucosal-to-serosal flux of ten [14C]-labeled AAs (L-glutamine, glycine, L-leucine, L-lysine, L-Met, L-serine, L-threonine, L-tryptophan, L-tyrosine and L-valine) was investigated at two concentrations (50 µM and 5 mM). Inhibition of apical uptake by mucosal L-Met was also measured for these AAs. The intestinal expression of apical AA transporters, angiotensin-converting enzyme II and inflammation-related genes were compared with those of a previous study. Results: Except for tryptophan and lysine at 5 mM, all AA fluxes were Na+-dependent (p ≤ 0.05), and the uptake of most AAs, except glycine and lysine, was inhibited by L-Met (p < 0.001). A correlation network existed between Na+-dependent fluxes of most AAs (except tryptophan and partly glycine). We observed the upregulation of B0AT1 (SLC6A19) (p < 0.001), the downregulation of ATB0,+ (SLC6A14) (p < 0.001) and a lower expression of CASP1, IL1β, IL8, TGFβ and TNFα in the present vs. the previous study (p < 0.001). Conclusions: The correlating AAs likely share the same Na+-dependent transporter(s). A varying effect of the Met supplement type on AA transport in the two studies might be related to a different level of supplementation or a different inflammatory status of the small intestine.
Moquiniastrum cordatum G. Sancho, comb. nov.
Creators: name: Sancho, Gisela
name: Funk, Ki. A.
name: Roque, Nádia
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Moquiniastrum
Moquiniastrum cordatum

description: 7. Moquiniastrum cordatum (Less.) G. Sancho, comb. nov.
 Basionym: Gochnatia cordata Lessing (1830: 263). Type:― BRAZIL. No date, F. Sellow s.n. (holotype B [destroyed], photo of B sheet at F is available online at Field Museum website 2012). Neotype:― BRAZIL. Rio Grande do Sul: Morro Sta. Teresinha, 1 April 1949, Irmaõ J. Cristovão s.n. (ICN 017113! designated here, isoneotypes G, LP 022462!, SPSF 03566!, US!)
 7.1. Moquiniastrum cordatum var. mollissimum (Hassler) Sancho, comb. nov.
 Basionym: Gochnatia cordata var. mollissima Hassler (1919: 27). Type:― PARAGUAY. No date, E . Hassler 9327 (holotype G, isotype S 11-28549, photo of S sheet available online at GPI 2003, P!)
description: Published as part of Sancho, Gisela, Funk, Ki. A. & Roque, Nádia, 2013, Moquiniastrum (Gochnatieae, Asteraceae): disentangling the paraphyletic Gochnatia, pp. 26-34 in Phytotaxa 147 (1) on page 31, DOI: 10.11646/phytotaxa.147.1.3, http://zenodo.org/record/5100233
Seiberg duality as derived equivalence for some quiver gauge theories
Creators: name: Mukhopadhyay, Subir
name: Ray, Koushik
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Seiberg duality of quiver gauge theories associated to the complex cone over the second del Pezzo surface. Homomorphisms in the path algebra of the quivers in each of these cases satisfy relations which follow from a superpotential of the corresponding gauge theory as F-flatness conditions. We verify that Seiberg duality between each pair of these theories can be understood as a derived equivalence between the categories of modules of representation of the path algebras of the quivers. Starting from the projective modules of one quiver we construct tilting complexes whose endomorphism algebra yields the path algebra of the dual quiver. Finally, we present a general scheme for obtaining Seiberg dual quiver theories by constructing quivers whose path algebras are derived equivalent. We also discuss some combinatorial relations between this approach and some of the other approaches which has been used to study such dualities.
description: 20 pages, Latex, References added
Solid Quark Stars?
Creators: name: Xu, R. X.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is conjectured that cold quark matter with much high baryon density could be in a solid state, and strange stars with low temperatures should thus be solid stars. The speculation could be close to the truth if no peculiar polarization of thermal X-ray emission (in, e.g., RXJ1856), or no gravitational wave in post-glitch phases, is detected in future advanced facilities, or if spin frequencies beyond the critical ones limited by r-mode instability are discovered. The shear modulus of solid quark matter could be ~ 10^{32} erg/cm^3 if the kHz QPOs observed are relevant to the eigenvalues of the center star oscillations.
description: Revised significantly, ApJL accepted, or at http://vega.bac.pku.edu.cn/~rxxu/publications/index_P.htm
Additional file 3 of Integration of genetic, transcriptomic, and clinical data provides insight into 16p11.2 and 22q11.2 CNV genes
Creators: name: Vysotskiy, Mikhail
name: Zhong, Xue
name: Miller-Fleming, Tyne W.
name: Zhou, Dan
name: Cox, Nancy J.
name: Weiss, Lauren A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Fig. S1-S6. Supplementary figures.
title: Multigrid based preconditioners for the numerical solution of two-dimensional heterogeneous problems in geophysics
Creators: name: Duff, IS
name: Gratton, S
name: Pinel, X
name: Vasseur, X
Publisher: name: CCLRC
Year: 2007
Subjects: direct method
multigrid
Helmholz
hybrid solver
iterative method
preconditioning

description: We study methods for the numerical solution of the Helmholtz equation for two-dimensional applications in geophysics. The common framework of the iterative methods in our study is a combination of an inner iteration with a geometric multigrid used as a preconditioner and an outer iteration with a Krylov subspace method. The preconditioning system is based on either a pure or shifted Helmholtz operator. A multigrid iteration is used to approximate the inverse of this operator. The proposed solution methods are evaluated on a complex benchmark in geophysics involving highly variable coefficients and high wavenumbers. We compare this preconditional iterative method with a direct method and a hybrid method that combines our iterative approach with a direct method on a reduced problem. We see that the hybrid outperforms both the iterative and the direct approach.
Youth Online: Learning, Activism and Democracy in the Middle East
Creators: name: Gümüş, Pınar
Publisher: name: KULT_online
Year: 2015

description: Wired Citizenship: Youth Learning and Activism in the Middle East, edited by Linda Herrera and Rehab Sakr, offers a rich collection of various studies focusing on young people’s online activities in virtual spaces in the Middle East and North Africa (MENA) region. Divided into two sections, the book investigates how the concepts and practices of democracy and citizenship are changing in the digital revolutionary age and how young people of a wired generation understand political and social change. Gathering together the works of social scientists from the fields of education policy, political science, sociology, anthropology, linguistics and international relations, this volume realizes an interdisciplinary and multidimensional picture of its subject matter.
description: KULT_online, Nr. 41 (2015): KULT_online 41 (2015)