cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A reduced model for precessional switching of thin-film nanomagnets under the influence of spin-torque
Creators: name: Lund, Ross G.
name: O'Flynn, Gabriel D. Chaves
name: Kent, Andrew D.
name: Muratov, Cyrill B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the magnetization dynamics of thin-film magnetic elements with in-plane magnetization subject to a spin-current flowing perpendicular to the film plane. We derive a reduced partial differential equation for the in-plane magnetization angle in a weakly damped regime. We then apply this model to study the experimentally relevant problem of switching of an elliptical element when the spin-polarization has a component perpendicular to the film plane, restricting the reduced model to a macrospin approximation. The macrospin ordinary differential equation is treated analytically as a weakly damped Hamiltonian system, and an orbit-averaging method is used to understand transitions in solution behaviors in terms of a discrete dynamical system. The predictions of our reduced model are compared to those of the full Landau--Lifshitz--Gilbert--Slonczewski equation for a macrospin.
description: 9 Pages, 5 Figures
Data paper: a key research output to powering up FAIR data
Creators: name: Loureiro-Vázquez, Vanesa
name: Darriba-López, Isaac G.
name: Balsa-Sánchez, Carlota
Publisher: name: Zenodo
Year: 2023

description: A data article is a brief type of paper whose main objective is to describe a dataset generated and used in a research process, to encourage FAIR data, reproducibility and reusability. Although this research output has a great potential for open science, it is a document type not well known among researchers, according to our own experience as data stewards at our institution. With the objective of giving literacy to the research community about data papers and encouraging its creation as a good open science practice, our poster will answer five questions: What is a data paper? What is their current status? Why to publish a data paper? Where to publish a data paper? Where to find support? By giving a response to these questions, our poster would comply with a double finality: On the one hand, it aims to explain the main characteristics and advantages of data papers to the research community. In addition, we want to present some interesting information about data papers: evolution of published items in recent years, percentage of data papers on open access and top funders. We have also identified the different names used by journals to refer to this research output. On the other hand, we provide a link to a list of journals where to read and submit this document type. This dataset has been created by our team, is available at a trusted repository under a Creative Commons license and is updated regularly. In conclusion, data papers can be considered a good practice in open science and are a further step to make research reproducible and data FAIRer. All these benefits must be known by the research community. Data stewards and libraries could guide them across this open science ecosystem, which includes new research outputs, such as data papers.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Royen's proof of the Gaussian correlation inequality
Creators: name: Latała, Rafał
name: Matlak, Dariusz
Publisher: name: arXiv
Year: 2015
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We present in detail Thomas Royen's proof of the Gaussian correlation inequality which states that $μ(K\cap L)\geq μ(K)μ(L)$ for any centered Gaussian measure $μ$ on $R^d$ and symmetric convex sets $K,L$ in $R^d$.
description: 9 pages
XMM-Newton Slew Survey observations of the gravitational wave event GW150914
Creators: name: Troja, E.
name: Read, A. M.
name: Tiengo, A.
name: Salvaterra, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The detection of the first gravitational wave (GW) transient GW150914 prompted an extensive campaign of follow-up observations at all wavelengths. Although no dedicated XMM-Newton observations have been performed, the satellite passed through the GW150914 error box during normal operations. Here we report the analysis of the data taken during these satellite slews performed two hours and two weeks after the GW event. Our data cover 1.1 square degrees and 4.8 square degrees of the final GW localization region. No credible X-ray counterpart to GW150914 is found down to a sensitivity of 6E-13 erg/cm2/s in the 0.2-2 keV band. Nevertheless, these observations show the great potential of XMM-Newton slew observations for the search of the electromagnetic counterparts of GW events. A series of adjacent slews performed in response to a GW trigger would take <1.5 days to cover most of the typical GW credible region. We discuss this scenario and its prospects for detecting the X-ray counterpart of future GW detections.
description: 6 pages, 3 figures, 2 tables. Accepted for publication in ApJ Letters
Reply to "Comment on "Normalization of quasinormal modes in leaky optical cavities and plasmonic resonators" " by E. A. Muljarov and W. Langbein
Creators: name: Kristensen, Philip Trøst
name: Ge, Rong-Chun
name: Hughes, Stephen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We refute all claims of the "Comment on "Normalization of quasinormal modes in leaky optical cavities and plasmonic resonators" " by E. A. Muljarov and W. Langbein (arXiv:1602.07278v1). Based entirely on information already contained in our original article (P. T. Kristensen, R.-C. Ge and S. Hughes, Physical Review A 92, 053810 (2015)), we dismiss every point of criticism as being completely unjustified and point out how important parts of our argumentation appear to have been overlooked by the Comment Authors. In addition, we provide additional calculations showing directly the link between the normalizations by Sauvan et al. and Muljarov et al., which were not included in our original article.
Pulsar Acceleration Shifts from nearby Supernova Explosion
Creators: name: Kodwani, Darsh
name: Pen, Ue-Li
name: Yang, I-Sheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that when a supernova explodes, a nearby pulsar signal goes through a very specific change. The observed period first changes smoothly, then is followed by a sudden change in the time derivative. A stable millisecond pulsar can allow us to measure such an effect. This may improve our measurement of the total energy released in neutrinos and also the orientation of the supernova-pulsar system.
description: 7 pages, 12 figures
Statistical Hauser-Feshbach theory with width fluctuation correction including direct reaction channels for neutron induced reaction at low energies
Creators: name: Kawano, T.
name: Capote, R.
name: Hilaire, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A model to calculate particle-induced reaction cross sections with statistical Hauser-Feshbach theory including direct reactions is given. The energy average of scattering matrix from the coupled-channels optical model is diagonalized by the transformation proposed by Engelbrecht and Weidenmüller. The ensemble average of $S$-matrix elements in the diagonalized channel space is approximated by a model of Moldauer [Phys.Rev.C {\bf 12}, 744 (1975)] using newly parametrized channel degree-of-freedom $ν_a$ to better describe the Gaussian Orthogonal Ensemble (GOE) reference calculations. Moldauer approximation is confirmed by a Monte Carlo study using randomly generated $S$-matrix, as well as the GOE three-fold integration formula. The method proposed is applied to the $^{238}$U(n,n') cross section calculation in the fast energy range, showing an enhancement in the inelastic scattering cross sections.
A Megaxion at 750 GeV as a First Hint of Low Scale String Theory
Creators: name: Ibanez, Luis E.
name: Martin-Lozano, Victor
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Low scale string models naturally have axion-like pseudoscalars which couple directly to gluons and photons (but not $W$s) at tree level. We show how they typically get tree level masses in the presence of closed string fluxes, consistent with the axion discrete gauge symmetry, in a way akin of the axion monodromy of string inflation and relaxion models. We discuss the possibility that the hints for a resonance at 750 GeV recently reported at ATLAS and CMS could correspond to such a heavy axion state (megaxion). Adjusting the production rate and branching ratios suggests the string scale to be of order $M_s$ ~ $7 - 10^4$ TeV, depending on the compactification geometry. If this interpretation was correct, one extra $Z'$ gauge boson could be produced before reaching the string threshold at LHC and future colliders.
description: 26 pages, 3 figures, 1 Megaxion
Heating and Acceleration of the Fast Solar Wind by Alfvén Wave Turbulence
Creators: name: van Ballegooijen, A. A.
name: Asgari-Targhi, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present numerical simulations of reduced magnetohydrodynamic (RMHD) turbulence in a magnetic flux tube at the center of a polar coronal hole. The model for the background atmosphere is a solution of the momentum equation, and includes the effects of wave pressure on the solar wind outflow. Alfvén waves are launched at the coronal base, and reflect at various heights due to variations in Alfvén speed and outflow velocity. The turbulence is driven by nonlinear interactions between the counter-propagating Alfvén waves. Results are presented for two models of the background atmosphere. In the first model the plasma density and Alfvén speed vary smoothly with height, resulting in minimal wave reflections and low energy dissipation rates. We find that the dissipation rate is insufficient to maintain the temperature of the background atmosphere. The standard phenomenological formula for the dissipation rate significantly overestimates the rate derived from our RMHD simulations, and a revised formula is proposed. In the second model we introduce additional density variations along the flux tube with a correlation length of 0.04 $R_\odot$ and with relative amplitude of $10 \%$. These density variations simulate the effects of compressive MHD waves on the Alfvén waves. We find that such variations significantly enhance the wave reflection and thereby the turbulent dissipation rates, producing enough heat to maintain the background atmosphere. We conclude that interactions between Alfvén- and compressive waves may play an important role in the turbulent heating of the fast solar wind.
Noncommutative Wormhole Solutions in Einstein Gauss-Bonnet Gravity
Creators: name: Rani, Shamaila
name: Jawad, Abdul
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this paper, we explore static spherically symmetric wormhole solutions in the framework of $n$-dimensional Einstein Gauss-Bonnet gravity. Our objective is to find out wormhole solutions that satisfy energy conditions. For this purpose, we consider two frameworks such as Gaussian distributed and Lorentzian distributed non-commutative geometry. Taking into account constant redshift function, we obtain solutions in the form of shape function. The fifth and sixth dimensional solutions with positive as well as negative Gauss-Bonnet coefficient are discussed. Also, we check the equilibrium condition for the wormhole solutions with the help of generalized Tolman-Oppenheimer-Volkov equation. It is interesting to mention here that we obtain fifth dimensional stable wormhole solutions in both distributions that satisfy the energy conditions.
description: 21 pages, 10 figures, Accepted for publication in Advances in High Energy Physics. arXiv admin note: text overlap with arXiv:1111.2468 by other authors
Maximum information entropy principle and the interpretation of probabilities in statistical mechanics - a short review
Creators: name: Kuic, Domagoj
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper an alternative approach to statistical mechanics based on the maximum information entropy principle (MaxEnt) is examined, specifically its close relation with the Gibbs method of ensembles. It is shown that the MaxEnt formalism is the logical extension of the Gibbs formalism of equilibrium statistical mechanics that is entirely independent of the frequentist interpretation of probabilities only as factual (i.e. experimentally verifiable) properties of the real world. Furthermore, we show that, consistently with the law of large numbers, the relative frequencies of the ensemble of systems prepared under identical conditions (i.e. identical constraints) actually correspond to the MaxEnt probabilites in the limit of a large number of systems in the ensemble. This result implies that the probabilities in statistical mechanics can be interpreted, independently of the frequency interpretation, on the basis of the maximum information entropy principle.
description: 15 pages, revtex4; The final publication is available at Springer via http://dx.doi.org/10.1140/epjb/e2016-70175-6
A new route towards merging massive black holes
Creators: name: Marchant, Pablo
name: Langer, Norbert
name: Podsiadlowski, Philipp
name: Tauris, Thomas
name: Moriya, Takashi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent advances in gravitational-wave astronomy make the direct detection of gravitational waves from the merger of two stellar-mass compact objects a realistic prospect. Evolutionary scenarios towards mergers of double compact objects generally invoke common-envelope evolution which is poorly understood, leading to large uncertainties in merger rates. We explore the alternative scenario of massive overcontact binary (MOB) evolution, which involves two very massive stars in a very tight binary which remain fully mixed due to their tidally induced high spin. We use the public stellar-evolution code MESA to systematically study this channel by means of detailed simulations. We find that, at low metallicity, MOBs produce double-black-hole (BH+BH) systems that will merge within a Hubble time with mass ratios close to one, in two mass ranges, ~25...60msun and >~ 130msun, with pair instability supernovae (PISNe) being produced in-between. Our models are also able to reproduce counterparts of various stages in the MOB scenario in the local Universe, providing direct support for it. We map the initial parameter space that produces BH+BH mergers, determine the expected chirp mass distribution, merger times, Kerr parameters and predict event rates. We typically find that for Z~
description: Accepted for publication in A&A. Abstract in the uploaded version differs slightly due to the arXiv character limit
Diamond Open Access - a Robust, Accessible and Federated Network for Journals (CRAFT-OA)
Creators: name: Arasteh, Sona
name: Mueller, Katharina
name: Klaus, Tabea
name: Varachkina, Hanna
name: Bargheer, Margo
Publisher: name: Zenodo
Year: 2023

description: Diamond Open Access - a Robust, Accessible and Federated Network for Journals Though Diamond Open Access is widely considered the most progressive publishing form for Open Access journals, Diamond Open Access journals face various challenges including (technological) standardisation, securing sustainability for journals and juggling a broad set of workflows while depending largely on voluntary work. The project CRAFT-OA (Creating a Robust Accessible Federated Technology for Open Access) aims to help standardize Diamond Open Access journals by offering technological innovations available to all Diamond Open Access journals alike. Furthermore, in cooperation with the DIAMAS project, CRAFT-OA will foster a community of practice, further enhancing Diamond Open Access publishing by uniting the scholarly community behind common goals and fostering Open Science in the ERA. The poster includes an overview of the key objectives of the project as well as a section dedicated to explaining which steps the project teams aim to take in order to make these goals become reality. Additionally, the poster includes a visualization of how the collaboration among the project group DIAMAS, CRAFT-OA and PALOMERA is set up. It shows how these collaborations work on a structural level. Specifically, it will be explained how the results of DIAMAS and CRAFT-OA complement each other and will be crucial to set up a Capacity Centre supporting institutional Diamond Open Access publishers by providing all information, best practice guidelines, workflows and training materials relating to Diamond Open Access in one place.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain).
Development and application of methods for spatio-temporal perturbation and analysis of protein interactions via intracellular protein microarrays
Creators: name: Venkatachalapathy, Muthukumaran
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Cell and systems biology
subject: Protein array
subject: Chemical biology
subject: 570
subject: 540

description: Many processes in mammalian cells, including adhesion and migration, require dynamic rearrangements of specialized filament structures, which are collectively called the cytoskeleton. Those dynamic rearrangements are controlled in space and time by signaling proteins, including the Rho family of small GTPases. In this thesis, the development and application of techniques to measure and perturb the activity of RhoGTPases in space and time is presented. First, a miniaturized, intracellular protein interaction array was developed to study multiple protein interactions inside an individual living cell. Using this technology, two distinct protein interactions were simultaneously monitored in individual cells to uncover cell-to-cell variance in their dynamic response to acute pharmacological perturbation. To generate those intracellular interaction arrays, bio-orthogonal artificial receptors were used that do not perturb normal cellular function. To optimize the processing of those receptors on the secretory pathway, their design was systematically improved by deletion analysis and insertion of linkers and glycosylation motifs. Those optimizations lead to a significant improvement of the plasma membrane targeting of artificial receptors. To perturb protein activities in living cells, a new class of optimized artificial receptors, termed ‘ActivatorPARCs’ was generated, that are based on subcellular targeting via chemically induced dimerization. Recruitment of ActivatorPARCs to subcellular regions in the plasma membrane enabled perturbation of RhoGTPase activity in space and time. To increase the speed of this perturbation and to enable more flexible control of spatial perturbations, ActivatorPARCs that are based on photo chemically induced dimerization were generated. Lateral diffusion of the uncaged photodimerizer was eliminated by covalent linkage on immobilized receptors. This enabled 'Molecular activity painting', a novel technique, in which rapid and stable perturbations can be directly “painted” with light inside individual living cells. The application of those tools to directly study spatio-temporal signal propagation in cellular reaction networks is discussed.
Van Est isomorphism for homogeneous cochains
Creators: name: Cabrera, Alejandro
name: Drummond, Thiago
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: VB-groupoids define a special class of Lie groupoids which carry a compatible linear structure. In this paper, we show that their differentiable cohomology admits a refinement by considering the complex of cochains which are k-homogeneous on the linear fiber. Our main result is a Van Est theorem for such cochains. We also work out two applications to the general theory of representations of Lie groupoids and algebroids. The case k=1 yields a Van Est map for representations up to homotopy on 2-term graded vector bundles. Arbitrary k-homogeneous cochains on suitable VB-groupoids lead to a novel Van Est theorem for differential forms on Lie groupoids with values in a representation.
Driving institutional changes in Research Performing Organisations to support CS
Creators: name: Livio Spera, Alessio
name: Iasillo, Claudia
Publisher: name: Zenodo
Year: 2023

description: The EU-funded TIME4CS project aims at closing the gap between the limited adoption of citizen science (CS) as a research methodology across European universities and Research Performing Organizations (RPOs) and the important benefits that can derive from it. We address this in a unique way, aiming to support sustainable Institutional Changes to promote CS in Science and Technology. We chose a distinctive paradigm, namely addressing this at the institutional level. 4 RPOs (‘Implementers’) are currently facing the challenge of introducing CS in their structures; in order to support this process, 3 more experienced organizations within the consortium, (‘Front-Runners’) assist and mentor the Implementers to follow their personalized institutional roadmap and implement the set of tailored Grounding Actions, namely practical actions that can trigger long term Institutional Changes within their organizations so they will promote the effective implementation of CS. This poster provides an extensive overview of our journey so far, presenting the method, outcomes and findings. This includes i) the definition of the drivers of successful institutional change in support of CS based on 38 Case Studies around the world; ii) the selection of 11 conditions enabling the institutional transformation of RPOs such as identifying champions; iii) the identification of indicators for both individual and institutional changes supporting CS; and iv) the development of a general roadmap framework for assuring institutional change in CS. These results will be linked to tangible examples of success and implementation based on 25 months of work in different RPOs and wide outreach among the community. Our examples range from a medical university to a specialized research institution and a multi-faculty university. The project is of interest to representatives of RPOs that are still at early stages of the implementation of CS, experts who are willing to spread the CS value as a research methodology outside their organization, as well as stakeholders and members of the community who are interested to learn how to ground RRI in society.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Molecular spectra in collective Dicke states
Creators: name: Sela, Eran
name: Fleurov, Victor
name: Yurovsky, Vladimir A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a model describing competition of interactions between $N$ two-level systems (TLSs) against decoherence. We apply it to analyze dye molecules in an optical microcavity, where molecular vibrations provide a local source for decoherence. Most interesting is the case when decoherence strongly affects each individual TLS, e.g. via broadening of emission lines as well as vibrational satellites, however its influence is strongly suppressed for large $N$ due to the interactions between TLSs. In this interaction dominated regime we find unique signatures in the emission spectrum, including strong $\mathcal{O}(\sqrt{N})$ level shifts, as well as $1/N$ suppression of both the decoherence width and of the vibrational satellites.
description: 13 pages, 8 figures
The Riemann Hypothesis For Period Polynomials Of Modular Forms
Creators: name: Jin, Seokho
name: Ma, Wenjun
name: Ono, Ken
name: Soundararajan, Kannan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: The period polynomial $r_f(z)$ for an even weight $k\geq 4$ newform $f\in S_k(Γ_0(N))$ is the generating function for the critical values of $L(f,s)$. It has a functional equation relating $r_f(z)$ to $r_f\left(-\frac{1}{Nz}\right)$. We prove the Riemann Hypothesis for these polynomials: that the zeros of $r_f(z)$ lie on the circle $|z|=\frac{1}{\sqrt{N}}$ . We prove that these zeros are equidistributed when either $k$ or $N$ is large.
description: 11 pages. We added the one sentence explanation for the $2n^{(k-1)/2}$ bound for $\Lambda_f(n)$. This paper will be appearing in Proceedings of the National Academy of Sciences, USA
Quasi-one-dimensional electron gas bound to a helium-coated nanotube
Creators: name: Liebrecht, Michael
name: Del Maestro, Adrian
name: Cole, Milton W.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A much-studied system is the quasi-2D electron gas in image-potential bound states at the surface of helium and hydrogen. In this paper, we report on an analogous quasi-1D system: electrons bound by image-like polarization forces to the surface of a helium-coated carbon nanotube. The potential is computed from an electron-helium pseudopotential, plus a dynamic image term evaluated from a semi-classical model of the nanotube's response function. Predictions are made for the bound states and potential many-body properties of this novel electron gas for a specific choice of tube radius and film thickness.
description: To appear in the Quantum Fluids and Solids 2015 JLTP conference proceedings
Empowering Higher Education Institutions by trainings for researchers on Open and RRI practices
Creators: name: Iasillo, Claudia
name: Livio Spera, Alessio
name: Ribeiro Do Canto Lagido, Cristina
name: Salnikova, Asya
Publisher: name: Zenodo
Year: 2023

description: The EU-funded PATTERN project aims at promoting the practice of Open and Responsible Research and Innovation (Open RRI) by developing and testing trainings for researchers at all stages of their careers. The project has defined 8 main transferable skills on Open RRI: Open Access; FAIR data management; Citizen Science; Research Integrity; Gender, Non-discrimination and Inclusion in research; Dissemination and Exploitation of results; Science communication; Management and Leadership. For each of them, specific training modules will be developed and tested in 14 Higher Education Institutions (HEIs) and made publicly accessible on the PATTERN platform. Moreover, PATTERN will address authorities responsible for researcher training, presenting evidence-based recommendations on educational policies to empower HEIs in contributing to bridge the gap between science and society. This poster will provide an overview of PATTERN methodology and discuss the results of the first 9 months of the project. In particular, it will focus on two aspects: Consolidated knowledge about the existing trainings on Open RRI and learning opportunities for researchers, identifying existing gaps, as the basis for the development of PATTERN training modules The analysis of European policies (including guidelines and policy framework) focusing on understanding how they contribute to including Open RRI practices in trainings and training materials aimed at researchers. The establishment of the EU level baseline will then be a basis for further analysis on how the EU approach is embedded at national level in the countries hosting the pilots. The findings of the two-level policy mapping, in addition to building on the mapping of trainings, will be a cornerstone for co-creating policy recommendations with and for EU and national authorities, as well as for actors in HEIs and RPOs.
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Evidence of a pseudogap driven by competing orders of multi-band origin in the ferromagnetic superconductor Sr$_{0.5}$Ce$_{0.5}$FBiS$_2$
Creators: name: Aslam, Mohammad
name: Paul, Arpita
name: Thakur, Gohil S.
name: Gayen, Sirshendu
name: Kumar, Ritesh
name: Singh, Avtar
name: Das, Shekhar
name: Ganguli, Ashok K.
name: Waghmare, Umesh V.
name: Sheet, Goutam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: From temperature and magnetic field dependent point-contact spectroscopy on the ferromagnetic superconductor Sr$_{0.5}$Ce$_{0.5}$FBiS$_2$ (bulk superconducting $T_c$ = 2.5 K) we observe (a) a pseudogap in the normal state that sustains to a remarkably high temperature of 40 K and (b) two-fold enhancement of $T_c$ upto 5 K in the point-contact geometry. In addition, Andreev reflection spectroscopy reveals a superconducting gap of 6 meV for certain point-contacts suggesting that the mean field $T_c$ of this system could be approximately 40 K, the onset temperature of pseudo-gap. Our results suggest that quantum fluctuations originating from other competing orders in Sr$_{0.5}$Ce$_{0.5}$FBiS$_2$ forbid a global phase coherence at high temperatures thereby suppressing $T_c$. Apart from the known ordering to a ferromagnetic state, our first-principles calculations reveal nesting of a multi-band Fermi surface and a significant electron-phonon coupling that could result in charge density wave-like instabilities.
description: This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics: Cond-mat. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it
Patient uptake rates for non-invasive prenatal screening for single gene disorders (NIPS-SGD) associated with advanced paternal age
Creators: name: Katz, Kylie
Publisher: name: No Publisher Supplied
Year: 2022

description: The objective of this study was to quantify uptake rates of non-invasive prenatal screening for single-gene disorders (NIPS-SGD) for pregnant subjects whose reproductive partner is of advanced paternal age and to understand reasons for declining this testing. To do so, we performed a retrospective chart review of 195 pregnant subjects seen at Rutgers-Robert Wood Johnson Medical School who were offered NIPS-SGD for advanced paternal age between June 1, 2017 and April 13, 2021. We performed multivariate logistic regression analysis to develop a predictive model for NIPS-SGD uptake. Overall NIPS-SGD uptake rate was 39.5%. We identified that the most significant factors associated with test uptake are if patients had additional prenatal testing, including NIPS for aneuploidy (OR=5.92), expanded carrier screening (OR=10.91), or invasive diagnostic testing (OR=15.55), if the genetic counseling was conducted over telemedicine (OR=6.54), if the father of the baby (FOB) was present (OR=5.06), and if it was the patient’s first pregnancy (OR=2.20). The most significant reported reason for declining testing was due to FOB being unavailable (40%). Subjects who opted for NIPS-SGD due to advanced paternal age were those whose male partner was present at the session and was available for a blood draw. These patients also were more likely to have invasive testing and expanded carrier screening, compared to people who did not have NIPS-SGD testing. FOB not being available was the single most common reason for declining NIPS-SGD. Current NIPS-SGD does not require a paternal sample. Thus, we anticipate a higher proportion of patients will opt for this screen in the future. Patients who are pursuing other fetal screening modalities are also interested in NIPS-SGD, in the context of advanced paternal age.
The Matsu Wheel: A Cloud-based Framework for Efficient Analysis and Reanalysis of Earth Satellite Imagery
Creators: name: Patterson, Maria T
name: Anderson, Nikolas
name: Bennett, Collin
name: Bruggemann, Jacob
name: Grossman, Robert
name: Handy, Matthew
name: Ly, Vuong
name: Mandl, Dan
name: Pederson, Shane
name: Pivarski, Jim
name: Powell, Ray
name: Spring, Jonathan
name: Wells, Walt
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Project Matsu is a collaboration between the Open Commons Consortium and NASA focused on developing open source technology for the cloud-based processing of Earth satellite imagery. A particular focus is the development of applications for detecting fires and floods to help support natural disaster detection and relief. Project Matsu has developed an open source cloud-based infrastructure to process, analyze, and reanalyze large collections of hyperspectral satellite image data using OpenStack, Hadoop, MapReduce, Storm and related technologies. We describe a framework for efficient analysis of large amounts of data called the Matsu "Wheel." The Matsu Wheel is currently used to process incoming hyperspectral satellite data produced daily by NASA's Earth Observing-1 (EO-1) satellite. The framework is designed to be able to support scanning queries using cloud computing applications, such as Hadoop and Accumulo. A scanning query processes all, or most of the data, in a database or data repository. We also describe our preliminary Wheel analytics, including an anomaly detector for rare spectral signatures or thermal anomalies in hyperspectral data and a land cover classifier that can be used for water and flood detection. Each of these analytics can generate visual reports accessible via the web for the public and interested decision makers. The resultant products of the analytics are also made accessible through an Open Geospatial Compliant (OGC)-compliant Web Map Service (WMS) for further distribution. The Matsu Wheel allows many shared data services to be performed together to efficiently use resources for processing hyperspectral satellite image data and other, e.g., large environmental datasets that may be analyzed for many purposes.
description: 10 pages, accepted for presentation to IEEE BigDataService 2016
Hilbert Exclusion: Improved Metric Search through Finite Isometric Embeddings
Creators: name: Connor, Richard
name: Cardillo, Franco Alberto
name: Vadicamo, Lucia
name: Rabitti, Fausto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.3

description: Most research into similarity search in metric spaces relies upon the triangle inequality property. This property allows the space to be arranged according to relative distances to avoid searching some subspaces. We show that many common metric spaces, notably including those using Euclidean and Jensen-Shannon distances, also have a stronger property, sometimes called the four-point property: in essence, these spaces allow an isometric embedding of any four points in three-dimensional Euclidean space, as well as any three points in two-dimensional Euclidean space. In fact, we show that any space which is isometrically embeddable in Hilbert space has the stronger property. This property gives stronger geometric guarantees, and one in particular, which we name the Hilbert Exclusion property, allows any indexing mechanism which uses hyperplane partitioning to perform better. One outcome of this observation is that a number of state-of-the-art indexing mechanisms over high dimensional spaces can be easily extended to give a significant increase in performance; furthermore, the improvement given is greater in higher dimensions. This therefore leads to a significant improvement in the cost of metric search in these spaces.
description: 41 pages, 19 figures
Molecular Bremsstrahlung Radiation at GHz Frequencies in Air
Creators: name: Samarai, I. Al
name: Berat, C.
name: Deligny, O.
name: Letessier-Selvon, A.
name: Montanet, F.
name: Settimo, M.
name: Stassi, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A detection technique for ultra-high energy cosmic rays, complementary to the fluorescence technique, would be the use of the molecular Bremsstrahlung radiation emitted by low-energy ionization electrons left after the passage of the showers in the atmosphere. In this article, a detailed estimate of the spectral intensity of photons at ground level originating from this radiation is presented. The spectral intensity expected from the passage of the high-energy electrons of the cascade is also estimated. The absorption of the photons in the plasma of electrons/neutral molecules is shown to be negligible. The obtained spectral intensity is shown to be $2\times10^{-21} $W cm$^{-2}$ GHz$^{-1}$ at 10 km from the shower core for a vertical shower induced by a proton of $10^{17.5}$ eV. In addition, a recent measurement of Bremsstrahlung radiation in air at gigahertz frequencies from a beam of electrons produced at 95 keV by an electron gun is also discussed and reasonably reproduced by the model.
description: 20 pages, 9 figures, figures (2,4,7) improved in v2, accepted by Phys. Rev. D
EUDAT CDI: Data shared and preserved across borders and disciplines
Creators: name: Smith, Zachary
name: Carillo, Rob
Publisher: name: Zenodo
Year: 2023

description: EUDAT aims to achieve the shared and preserved data vision by enabling data stewardship within and between European research communities through a Collaborative Data Infrastructure (CDI). This infrastructure offers European researchers and practitioners from any research discipline a trusted environment to preserve, find, access, and process data. The CDI is a common model and service infrastructure that manages data spanning all European research data centres and community data repositories. EUDAT supports the goals of the conference offering open and seamless services for storage, management, analysis and re-use of research data, across borders and scientific disciplines that increase reproducibility and interoperability of data. The poster highlights the heterogeneous research data management services and storage resources, supporting multiple research communities as well as individuals in increasing the reproducibility and interoperability of their data, through a geographically distributed, resilient network distributed across 15 European nations and data is stored alongside some of Europe’s most powerful supercomputers (B2 Service Suite). The poster includes demonstrator use cases that show the value of the EUDAT services for researchers. There is also an emphasis on how researchers can try the services, with most services having a freemium model (with a free version of the service with limited capabilities).
description: This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)
Measurements of jet quenching with semi-inclusive charged jet distributions in $Au+Au$ collisions at $\sqrt{s_{NN}}$=200 GeV
Creators: name: Jacobs, P. M.
name: Schmah, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report measurements of jet quenching in $Au+Au$ collisions at $\sqrt{s_{NN}}$=200 GeV, based on the semi-inclusive distribution of reconstructed charged particle jets recoiling from a high $p_T$ hadron trigger. Jets are reconstructed with the anti-k$_T$ algorithm ($R$=0.2 to 0.5), with low IR-cutoff of track constituents ($p_{T}>0.2$ GeV/c). Uncorrelated background is corrected using a novel mixed-event technique, with no fragmentation bias imposed by the correction procedure on the accepted recoil jet population. Corrected recoil jet distributions, reported in the range $0
description: Proceedings of the Quark Matter 2015 conference
Supplementary Results from Comparing the potential for maternal–fetal signalling in oviparous and viviparous lizards
Creators: name: Wen, Jinglin
name: Ishihara, Teruhito
name: Renfree, Marilyn
name: Griffith, Oliver
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: 60408 Genomics

description: The evolution of a placenta requires several steps including changing the timing of reproductive events, facilitating nutrient exchange, and the capacity for maternal–fetal communication. To understand the evolution of maternal–fetal communication, we used ligand-receptor gene expression as a proxy for the potential for cross-talk in a live-bearing lizard (Pseudemoia entrecasteauxii) and homologous tissues in a related egg-laying lizard (Lampropholis guichenotti). Approximately 70% of expressed ligand/receptor genes were shared by both species. Gene ontology (GO) analysis showed that there was no GO-enrichment in the fetal membranes of the egg-laying species, but live-bearing fetal tissues were significantly enriched for 50 GO-terms. Differences in enrichment suggest the evolution of viviparity involved reenforcing specific signalling pathways, perhaps to support fetal control of placentation. One identified change was in transforming growth factor beta signalling. Using immunohistochemistry, we show the production of the signalling molecule inhibin beta B occurs in viviparous fetal membranes but was absent in closely related egg-laying tissues, suggesting that the evolution of viviparity may have involved changes to signalling via this pathway. We argue that maternal–fetal signalling evolved through co-opting expressed signalling molecules and recruiting new signalling molecules to support the complex developmental changes required to support a fetus in utero.This article is part of the theme issue ‘Extraembryonic tissues: exploring concepts, definitions and functions across the animal kingdom’.
Holographic Chern-Simons Defects
Creators: name: Fujita, Mitsutoshi
name: Melby-Thompson, Charles M.
name: Meyer, Rene
name: Sugimoto, Shigeki
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study SU(N) Yang-Mills-Chern-Simons theory in the presence of defects that shift the Chern-Simons level from a holographic point of view by embedding the system in string theory. The model is a D3-D7 system in Type IIB string theory, whose gravity dual is given by the AdS soliton background with probe D7-branes attaching to the AdS boundary along the defects. We holographically renormalize the free energy of the defect system with sources, from which we obtain the correlation functions for certain operators naturally associated to these defects. We find interesting phase transitions when the separation of the defects as well as the temperature are varied. We also discuss some implications for the Fractional Quantum Hall Effect and for two-dimensional QCD.
description: 56 pages, 19 figures, v2: sign convention for CS level in terms of number of D7 branes switched, UV behavior of one and two point functions added in sec. 5.4.1 and 5.4.3, references added, typos corrected
Compressive Sensing Based Design of Sparse Tripole Arrays
Creators: name: Hawes, Matthew
name: Liu, Wei
name: Mihaylova, Lyudmila
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper considers the problem of designing sparse linear tripole arrays. In such arrays at each antenna location there are three orthogonal dipoles, allowing full measurement of both the horizontal and vertical components of the received waveform. We formulate this problem from the viewpoint of Compressive Sensing (CS). However, unlike for isotropic array elements (single antenna), we now have three complex valued weight coefficients associated with each potential location (due to the three dipoles), which have to be simultaneously minimised. If this is not done, we may only set the weight coefficients of individual dipoles to be zero valued, rather than complete tripoles, meaning some dipoles may remain at each location. Therefore, the contributions of this paper are to formulate the design of sparse tripole arrays as an optimisation problem, and then we obtain a solution based on the minimisation of a modified l1 norm or a series of iteratively solved reweighted minimisations, which ensure a truly sparse solution. Design examples are provided to verify the effectiveness of the proposed methods and show that a good approximation of a reference pattern can be achieved using fewer tripoles than a Uniform Linear Array (ULA) of equivalent length.
A non-geometric representation of the Dirac equation in curved spacetime
Creators: name: Vassiliev, Dmitri
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q41

description: We write the Dirac equation in curved 4-dimensional Lorentzian spacetime using concepts from the analysis of partial differential equations as opposed to geometric concepts.