cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Linear State-Space Model with Time-Varying Dynamics
Creators: name: Luttinen, Jaakko
name: Raiko, Tapani
name: Ilin, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper introduces a linear state-space model with time-varying dynamics. The time dependency is obtained by forming the state dynamics matrix as a time-varying linear combination of a set of matrices. The time dependency of the weights in the linear combination is modelled by another linear Gaussian dynamical model allowing the model to learn how the dynamics of the process changes. Previous approaches have used switching models which have a small set of possible state dynamics matrices and the model selects one of those matrices at each time, thus jumping between them. Our model forms the dynamics as a linear combination and the changes can be smooth and more continuous. The model is motivated by physical processes which are described by linear partial differential equations whose parameters vary in time. An example of such a process could be a temperature field whose evolution is driven by a varying wind direction. The posterior inference is performed using variational Bayesian approximation. The experiments on stochastic advection-diffusion processes and real-world weather processes show that the model with time-varying dynamics can outperform previously introduced approaches.
description: The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-662-44851-9_22
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 6 (114 b)]
Creators: name: Nicolaus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1446
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Nicolaus de Bacharinis, Notar und officialis ad officium assessorum praesentialiter deputatus des Albertus de Gaietanis sowie Sohn des verstorbenen Georgius, aus der contrata St. Crucis [in Ferrara], meldet dem generale consilium von Ferrara den Verkauf zweier Häuser, gelegen in der contrata St. Mariae de Vado in Ferrara, durch Guido Gonzaga, potonotarius aus Ferrara und Sohn des verstorbenen princeps Francesco I. Gonzaga, seinerseits einst Herr von Mantua usw., an Franceschinus de Benceuenis aus Cotignola, Sohn des verstorbenen Blasius, seinerseits genannt Pilatus, wohnhaft in der contrata St. Mariae de Vado.
Anomalous nuclear magnetic resonance spectra in Bi$_2$Se$_3$ nanowires
Creators: name: Nisson, D. M.
name: Dioguardi, A. P.
name: Peng, X.
name: Yu, D.
name: Curro, N. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report $^{209}$Bi nuclear magnetic resonance (NMR) spectra of in nanowires and single crystals of Bi$_2$Se$_3$. Crystals were powdered to simulate the random orientation of the nanowires, and the spectra are compared with theoretical expectations derived via an orientational study of a single crystal. The nanowire spectra are consistent with the randomly oriented powders, however we find an unusual suppression of signal intensity as a function of field orientation that may be associated with screening by surface currents.
description: 7 pages, 8 figures, to appear in Phys. Rev. B
Chiral dualities for SQCD$_{3}$ with D-type superpotential
Creators: name: Amariti, Antonio
name: Morgante, Davide
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study dualities for $3d$ $\text{U}(N_{c})_k$ chiral SQCD with $D_{n+2}$-type superpotential, with $n$ odd. We give a complete classification of such dualities in terms of the number of fundamentals and anti-fundamentals and the Chern-Simons level. The classification is obtained by real mass and Higgs flows from non-chiral dualities and we check the consistency of the new non-chiral dualities at the level of the partition function. We we also check that the complex phases appearing in the integral identities between the partition functions are consistent with the contact terms computed as quantum corrections to the effective Chern-Simons level. The $\text{SU}(N_{c})_k$ cases are recovered by gauging the topological symmetry from the $\text{U}(N_{c})$ dualities. Finally, we consider the case of $\text{USp}(2N_{c})_{2k}$ with two antisymmetric tensors and $D_{n+2}$-type superpotential.
description: 29 pages
Quantum enhancement of a single quantum battery by repeated interactions with large spins
Creators: name: Chen, P.
name: Yin, T. S.
name: Jiang, Z. Q.
name: Jin, G. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A generalized collision model is developed to investigate coherent charging a single quantum battery by repeated interactions with many-atom large spins, where collective atom operators are adopted and the battery is modeled by a uniform energy ladder. For an initially empty battery, we derive analytical results of the average number of excitations and hence the charging power in the short-time limit. Our analytical results show that a faster charging and an increased amount of the power in the coherent protocol uniquely arise from the phase coherence of the atoms. Finally, we show that the charging power defined by the so-called ergotropy almost follows our analytical result, due to a nearly pure state of the battery in the short-time limit.
description: 9 pages, 5 figures
An Alternate History of the Warring States
Creators: name: Arminio, Angelo
Publisher: name: RSAJournal
Year: 2022

description: Matt Gallagher’s 2020 novel Empire City features an alternate history where the USA, having emerged victorious in Vietnam, have gone on to wage an endless war in the Mediterranean while citizens live in a militaristic police state. This article argues that Gallagher’s novel moves between alternate history and superhero fiction to highlight the consequences of an indiscriminate use of executive power through the imposition of a perpetual state of exception – a pervasive feature of western democracies according to Giorgio Agamben. This alarming rupture between the government, citizens, and soldiers exposes an authoritarian threat that, unlike in typical alternate histories, is not tied to a foreign menace or ideology. Rather, it originates within the American democratic state, where the alienating absence of truly democratic decisions on military operations results in a sharp divide between civilians and service members, raising questions about the motives of the US imperialist practices. In this context, the story reads like a cautionary tale that responds to a perceived state of emergency of American democracy and its declining global hegemony.
description: RSAJournal, Vol. 33 (2022): Sites of Emergency, States of Exception
The Void in the Sculptor Group Spiral Galaxy NGC 247
Creators: name: Wagner-Kaiser, R.
name: Demaio, T.
name: Sarajedini, A.
name: Chakrabarti, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The dwarf galaxy NGC 247, located in the Sculptor Filament, displays an apparent void on the north side of its spiral disk. The existence of the void in the disk of this dwarf galaxy has been known for some time, but the exact nature and cause of this strange feature has remained unclear. We investigate the properties of the void in the disk of NGC 247 using photometry of archival Hubble Space Telescope data to analyze the stars in and around this region. Based on a grid of isochrones from log(t)=6.8 to log(t)=10.0, we assign ages using nearest-neighbor interpolation. Examination of the spatial variation of these ages across the galaxy reveals an age difference between stars located inside the void region and stars located outside this region. We speculate that the void in NGC 247's stellar disk may be due to a recent interaction with a nearly dark sub-halo that collided with the disk and could account for the long-lived nature of the void.
description: 11 pages, 10 figures, 3 tables. Accepted 2014 June 25. Received 2014 June 2; in original form 2014 March 25. MN-14-0765-MJ
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 4 (46 b)]
Creators: name: Garetus De Ast
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1311
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Garetus de Ast, generalis auditor am Hofe König Heinrichs VII., weist auf Verlangen des Lafranchus, Abt des Klosters [St. Nazarii] in Biandrate im Erzbistum Vercelli, den Notar Ludixius Conatus de Rippa aus dem Ezbistum Turin an, eine Urkunde im Zuge eines Rechtsstreits zu beglaubigen. Es schließt sich ein weiterer Rechtsakt an.
Growth inhibitory properties of endothelin-1 in activated human hepatic stellate cells: a cyclic adenosine monophosphate-mediated pathway. Inhibition of both extracellular signal-regulated kinase and c-Jun kinase and upregulation of endothelin B receptors.
Creators: name: Lotersztajn, S
name: Brenner, D A
name: Dhumeaux, D
name: Gallois, C
name: Bradham, C
name: Fouassier, L
name: Raufaste, D
name: Maclouf, J
name: Mavier, P
name: Mallat, A
name: Préaux, A M
name: Iourgenko, V
name: Serradeil-Le Gal, C
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: During chronic liver diseases, hepatic stellate cells (HSC) acquire an activated myofibroblast-like phenotype, proliferate, and synthetize fibrosis components. We have shown that endothelin-1 (ET-1) inhibits the proliferation of activated human HSC via endothelin B (ETB) receptors. We now investigate the transduction pathway involved in the growth inhibitory effect of ET-1 in activated HSC. Endothelin-1 and the ETB receptor agonist, sarafotoxin-S6C, increased synthesis of PGI2 and PGE2, leading to elevation of cAMP. The cyclooxygenase inhibitor ibuprofen and the adenylyl cyclase inhibitor SQ22536 both blunted the growth inhibitory effect of ET-1. Analysis of early steps associated with growth inhibition indicated that: (a) similar to ET-1, forskolin decreased c-jun mRNA induction without affecting c-fos and krox 24 mRNA expression; (b) ET-1, sarafotoxin-S6C, as well as forskolin, reduced activation of both c-Jun kinase and extracellular signal-regulated kinase. Finally, forskolin, PGI2, and PGE2 raised by fivefold the number of ET binding sites after 6 h, and increased the proportion of ETB receptors from 50% in control cells to 80% in treated cells. In conclusion, ET-1 inhibits proliferation of activated HSC via ETB receptors, through a prostaglandin/cAMP pathway that leads to inhibition of both extracellular signal-regulated kinase and c-Jun kinase activities. Upregulation of ETB receptors by prostaglandin/cAMP raises the possibility of a positive feedback loop that would amplify the growth inhibitory response. These results suggest that ET-1 and agents that increase cAMP might be of interest to limit proliferation of activated HSC during chronic liver diseases.
Modelling the energy distribution in CHIME/FRB Catalog-1
Creators: name: Bhattacharyya, Siddhartha
name: Bharadwaj, Somnath
name: Tiwari, Himanshu
name: Majumdar, Suman
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We characterize the intrinsic properties of any FRB using its redshift $z$, spectral index $α$ and energy $E_{33}$ in units of $10^{33} \, {\rm J}$ emitted across $2128 - 2848\; {\rm MHz}$ in the FRB's rest frame. Provided that $z$ is inferred from the measured extra-galactic dispersion measure $DM_{\rm Ex}$, the fluence $F$ of the observed event defines a track in $(α, E_{33})$ space which we refer to as the "energy track". Here we consider the energy tracks for a sample of $254$ non-repeating low dispersion measure FRBs from the CHIME/FRB Catalog-1, and use these to determine $n(E_{33} \mid α)$ the conditional energy distribution i.e. the number of FRBs in the interval $ΔE_{33}$ given a value of $α$. Considering $-10 \le α\le 10$, we find that the entire energy scale shifts to higher energy values as $α$ is increased. For all values of $α$, we can identify two distinct energy ranges indicating that there are possibly two distinct FRB populations. At high energies, the distribution is well fitted by a modified Schechter function whose slope and characteristic energy both increase with $α$. At low energies, the number of FRBs are in excess of the predictions of the modified Schechter function indicating that we may have a distinctly different population of low-energy FRBs. We have checked that our main findings are reasonably robust to the assumptions regarding the Galactic Halo and Host galaxy contributions to the dispersion measure.
description: 7 pages, 9 figures, Submitted to MNRAS
Absolute colors and phase coefficients of asteroids
Creators: name: Alvarez-Candal, A.
name: Corral, S. Jiménez
name: Colazo, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context: We use phase curves of small bodies to measure absolute magnitudes and, together with complementary theoretical and laboratory results, to understand their surfaces' micro and macroscopic properties. Although we can observe asteroids up to phase angles of about 30 deg, the range of phase angles covered by outer solar system objects usually does not go further than 7 to 10 deg for centaurs and 2 deg for trans-Neptunian objects, and a linear relation between magnitude and phase angle may be assumed. Aims: We aim at directly comparing data taken for objects in the inner solar system (inside the orbit of Jupiter) with data of centaurs and trans-Neptunian objects. Methods: We use the SLOAN Moving Objects Catalog data to construct phase curves restricted to phase angles less than or equal to 7.5 deg, compatible with the angles observed for the trans-Neptunian/Centaur population. We assume a linear model for the photometric behavior to obtain absolute magnitudes and phase coefficients in the ugirz, V, and R filters. Results: We obtained absolute magnitudes in seven filters for $>4000$ objects. Our comparison with outer solar system objects points to a common property of the surfaces: intrinsically redder objects become blue with increasing phase angle, while the opposite happens for intrinsically bluer objects.
description: 8 pages, 11 figures, 1 appendix, accepted for publication in A&A
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 6 (114 c)]
Creators: name: Rolandinus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1446
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Rolandinus a Cornu, publicus banitor von Ferrara, meldet mit Erlaubnis des Albertus de Gaietanis, seinerseits Doktor der Rechte, vicarius und assessor des Podestà von Ferrara, Andrea de Bonromeis de Sancto Miniato, dem Notar Libanorius de Curlo, Sohn des Jacobus, aus Ferrara den Kauf zweier Häuser, gelegen in der contrata St. Mariae de Vado in Ferrara, durch Guido Gonzaga, protonotarius aus Ferrara und Sohn des verstorbenen princeps Francesco I. Gonzaga, seinerseits einst Herr von Mantua usw., an Franceschinus de Benceuenis aus Cotignola, Sohn des verstorbenen Blasius, seinerseits genannt Pilatus, wohnhaft in der contrata St. Mariae de Vado.
pulsar_spectra: A pulsar flux density catalogue and spectrum fitting repository
Creators: name: Swainston, N. A.
name: Lee, C. P.
name: McSweeney, S. J.
name: Bhat, N. D. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the pulsar_spectra software repository, an open-source pulsar flux density catalogue and automated spectral fitting software that finds the best spectral model and produces publication-quality plots. The Python-based software includes features that enable users in the astronomical community to add newly published spectral measurements to the catalogue as they become available. The spectral fitting software is an implementation of the method described in Jankowski et al. (2018) which uses robust statistical methods to decide on the best-fitting model for individual pulsar spectra. pulsar_spectra is motivated by the need for a centralised repository for pulsar flux density measurements to make published measurements more accessible to the astronomical community and provide a suite of tools for measuring spectra.
The advent and fall of a vocabulary learning bias from communicative efficiency
Creators: name: Carrera-Casado, David
name: Ferrer-i-Cancho, Ramon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Information Theory (cs.IT)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Biosemiosis is a process of choice-making between simultaneously alternative options. It is well-known that, when sufficiently young children encounter a new word, they tend to interpret it as pointing to a meaning that does not have a word yet in their lexicon rather than to a meaning that already has a word attached. In previous research, the strategy was shown to be optimal from an information theoretic standpoint. In that framework, interpretation is hypothesized to be driven by the minimization of a cost function: the option of least communication cost is chosen. However, the information theoretic model employed in that research neither explains the weakening of that vocabulary learning bias in older children or polylinguals nor reproduces Zipf's meaning-frequency law, namely the non-linear relationship between the number of meanings of a word and its frequency. Here we consider a generalization of the model that is channeled to reproduce that law. The analysis of the new model reveals regions of the phase space where the bias disappears consistently with the weakening or loss of the bias in older children or polylinguals. The model is abstract enough to support future research on other levels of life that are relevant to biosemiotics. In the deep learning era, the model is a transparent low-dimensional tool for future experimental research and illustrates the predictive power of a theoretical framework originally designed to shed light on the origins of Zipf's rank-frequency law.
description: In press in Biosemiotics; version improved with reviewer comments; typos corrected
Constructing and Contesting the State(s) of Exception
Creators: name: Schiavini, Cinzia
Publisher: name: RSAJournal
Year: 2022

description: The article investigates how the state(s) of exception generated by 9/11 events, post-national dreams and not-so-postnational realities are at play in Joseph O’Neill’s Netherland (2008). Constructed as a series of flashbacks from the narrative present of 2006 in London, the story is told from the perspective of the Dutch-born equities analyst Hans van der Broek, who, after moving to New York in 1998, experiences the social and psychological consequences of 9/11 and becomes emotionally estranged from his wife Rachel (who decides to return to England with their infant son). He seeks refuge and companionship in the immigrant world of American cricket and in his friendship with Chuck Ramkissoon, an Indo-Trinidadian immigrant, entrepreneur and small-time gangster, whose dream of building the nation’s first multicultural cricket park ends with the recovery of his body in a canal in Brooklyn. With a special focus on the self-reflexive dimension of the novel, the article explores the dialectics between the 9/11 anxieties and the endless promises of the American Dream, and in particular the state of emergency/exception as an identitarian mode of representation and the processes of memorialization and (re)memory it engenders.
description: RSAJournal, Vol. 33 (2022): Sites of Emergency, States of Exception
On general-relativistic Lagrangian perturbation theory and its non-perturbative generalization
Creators: name: Buchert, Thomas
name: Gaspar, Ismael Delgado
name: Ostrowski, Jan J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Newtonian Lagrangian perturbation theory is a widely used framework to study structure formation in cosmology in the nonlinear regime. We review a general-relativistic formulation of such a perturbation approach, emphasizing results on already developed extensive formalism including among other aspects: the non-perturbative modeling of Ricci and Weyl curvatures, gravitational waves and pressure-supported fluids. We discuss subcases of exact solutions related to Szekeres Class II and, as exact average model, Ricci-flat LTB models. This latter forms the basis of a generalization that we then propose in terms of a scheme that goes beyond the relativistic Lagrangian perturbation theory on a global homogeneous-isotropic background cosmology. This new approximation does not involve a homogeneous reference background and it contains Szekeres class I (and thus general LTB models) as exact subcases. Most importantly, this new approximation allows for the interaction of structure with an evolving `background cosmology', conceived as a spatial average model, and thus includes cosmological backreaction.
description: 26 pages, 4 figures, matches published version in Universe
Hepatic lipase gene therapy in hepatic lipase-deficient mice. Adenovirus-mediated replacement of a lipolytic enzyme to the vascular endothelium.
Creators: name: Meyn, S
name: Shamburek, R
name: Applebaum-Bowden, D
name: Kashyap, V S
name: Kobayashi, J
name: Maeda, N
name: Santamarina-Fojo, S
name: Parrott, C
name: Berard, A
name: Brown, D R
name: Brewer, H B
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: Hepatic lipase (HL) is an endothelial-bound lipolytic enzyme which functions as a phospholipase as well as a triacylglycerol hydrolase and is necessary for the metabolism of IDL and HDL. To evaluate the feasibility of replacing an enzyme whose in vivo physiologic function depends on its localization on the vascular endothelium, we have infused recombinant replication-deficient adenovirus vectors expressing either human HL (HL-rAdV; n = 7) or luciferase cDNA (Lucif-rAdV; n = 4) into HL-deficient mice with pretreatment plasma cholesterol, phospholipid, and HDL cholesterol values of 176 +/- 9, 314 +/- 12, and 129 +/- 9, respectively. After infusion of HL-rAdV, HL could be detected in the postheparin plasma of HL-deficient mice by immunoblotting and postheparin plasma HL activities were 25,700 +/- 4,810 and 1,510 +/- 688 nmol/min/ml on days 5 and 15, respectively. Unlike the mouse HL, 97% of the newly synthesized human HL was heparin releasable, indicating that the human enzyme was virtually totally bound to the mouse vascular endothelium. Infusion of HL-rAdV in HL-deficient mice was associated with a 50-80% decrease in total cholesterol, triglyceride, phospholipids, cholesteryl ester, and HDL cholesterol (P < 0.001) as well as normalization of the plasma fast protein liquid chromatography lipoprotein profile by day 8. These studies demonstrate successful expression and delivery of a lipolytic enzyme to the vascular endothelium for ultimate correction of the HL gene defect in HL-deficient mice and indicate that recombinant adenovirus vectors may be useful in the replacement of endothelial-bound lipolytic enzymes in human lipolytic deficiency states.
Hierarchical Interdisciplinary Topic Detection Model for Research Proposal Classification
Creators: name: Xiao, Meng
name: Qiao, Ziyue
name: Fu, Yanjie
name: Dong, Hao
name: Du, Yi
name: Wang, Pengyang
name: Xiong, Hui
name: Zhou, Yuanchun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The peer merit review of research proposals has been the major mechanism for deciding grant awards. However, research proposals have become increasingly interdisciplinary. It has been a longstanding challenge to assign interdisciplinary proposals to appropriate reviewers, so proposals are fairly evaluated. One of the critical steps in reviewer assignment is to generate accurate interdisciplinary topic labels for proposal-reviewer matching. Existing systems mainly collect topic labels manually generated by principal investigators. However, such human-reported labels can be non-accurate, incomplete, labor intensive, and time costly. What role can AI play in developing a fair and precise proposal reviewer assignment system? In this study, we collaborate with the National Science Foundation of China to address the task of automated interdisciplinary topic path detection. For this purpose, we develop a deep Hierarchical Interdisciplinary Research Proposal Classification Network (HIRPCN). Specifically, we first propose a hierarchical transformer to extract the textual semantic information of proposals. We then design an interdisciplinary graph and leverage GNNs for learning representations of each discipline in order to extract interdisciplinary knowledge. After extracting the semantic and interdisciplinary knowledge, we design a level-wise prediction component to fuse the two types of knowledge representations and detect interdisciplinary topic paths for each proposal. We conduct extensive experiments and expert evaluations on three real-world datasets to demonstrate the effectiveness of our proposed model.
description: 14 pages, Accepted by IEEE Transactions on Knowledge and Data Engineering. arXiv admin note: substantial text overlap with arXiv:2203.10922
Anisotropic magnetodielectric coupling behavior of Ca3Co1.4Rh0.6O6 due to geometrically frustrated magnetism
Creators: name: Basu, Tathamay
name: Iyer, Kartik K.
name: Singh, Kiran
name: Mukherjee, K.
name: Paulose, P. L.
name: Sampathkumaran, E. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated the magnetic, dielectric and magnetodielectric (MDE) behavior of a geometrically frustrated spin-chain system, Ca3Co1.4Rh0.6O6, in the single crystalline form for different orientations. The results bring out that the magnetic behavior of this compound is by itself interesting in the sense that this compound exhibits an anisotropic glassy-like magnetic behavior with a huge frequency dependence of ac susceptibility peak for an orientation along the spin-chain in the range 30-60 K; this behavior is robust to applications of large external magnetic fields (H) unlike in canonical spin-glasses. The temperature dependence of dielectric constant also shows strong frequency dependence with similar robustness to H. The isothermal H-dependent dielectric results at low temperatures establishes anisotropic MDE coupling. It is intriguing to note that there is a 'step' roughly at one-third of saturation values as in the case of isothermal magnetization curves for same temperatures (for orientation along spin-chain), a correlation hitherto unrealized for geometrically frustrated systems.
description: Applied Physics Letters, in press. Supplementary Material is included
A Hybrid SIE-PDE Formulation Without Boundary Condition Requirement for Transverse Magnetic Electromagnetic Analysis
Creators: name: Sun, Aipeng
name: Zhu, Zekun
name: Yang, Shunchuan
name: Zhizhang
name: Chen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: A hybrid surface integral equation partial differential equation (SIE-PDE) formulation without the boundary condition requirement is proposed to solve the transverse magnetic (TM) electromagnetic problems. In the proposed formulation, the computational domain is decomposed into two overlapping domains: the SIE and PDE domains. In the SIE domain, complex structures with piecewise homogeneous media, e.g., highly conductive media, are included. An equivalent model for those structures is constructed by replacing them with the background medium and introducing a surface equivalent electric current density on an enclosed boundary to represent their electromagnetic effects. The remaining computational domain and homogeneous background medium replaced domain consist of the PDE domain, in which inhomogeneous or non-isotropic media are included. Through combining the surface equivalent electric current density and the inhomogeneous Helmholtz equation, a hybrid SIE-PDE formulation is derived. It requires no boundary conditions, and is mathematically equivalent to the original physical model. Through careful construction of basis functions to expand electric fields and the equivalent current density, the discretized formulation is made compatible with the SIE and PDE domain interface. The accuracy and efficiency are validated through two numerical examples. Results show that the proposed SIE-PDE formulation can obtain accurate results, and significant performance improvements in terms of CPU time and memory consumption compared with the FEM are achieved.
Rotating Solar Models in Agreement with Helioseismic Results and Updated Neutrino Fluxes
Creators: name: Yang, Wuming
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Standard solar models (SSMs) constructed in accordance with old solar abundances are in reasonable agreement with seismically inferred results, but SSMs with new low-metal abundances disagree with the seismically inferred results. The constraints of neutrino fluxes on solar models exist in parallel with those of helioseismic results. The solar neutrino fluxes were updated by Borexino Collaboration. We constructed rotating solar models with new low-metal abundances where the effects of enhanced diffusion and convection overshoot were included. A rotating model using OPAL opacities and the Caffau abundance scale has better sound-speed and density profiles than the SSM with the old solar abundances and reproduces the observed $p$-mode frequency ratios $r_{02}$ and $r_{13}$. The depth and helium abundance of the convection zone of the model agree with the seismically inferred ones at the level of $1σ$. The updated neutrino fluxes are also reproduced by the model at the level of $1σ$. The effects of rotation and enhanced diffusion not only improve the model's sound-speed and density profiles but bring the neutrino fluxes predicted by the model into agreement with the detected ones. Moreover, the calculations show that OP may underestimate opacities for the regions of the Sun with $T\gtrsim5\times10^{6}$ K by around $1.5\%$, while OPAL may underestimate opacities for the regions of the Sun with $2\times10^{6}$ K $\lesssim T \lesssim 5\times10^{6}$ K by about $1-2\%$.
description: 32 pages, 10 figures, 7 tables. Accepted for publication in ApJ
Coulomb Effects on time-trajectory-resolved high-order harmonic generation
Creators: name: Xie, X. J.
name: Xu, R. H.
name: Yu, S. J.
name: Liu, X.
name: Li, W.
name: Chen, Y. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the effect of Coulomb potential on high-order harmonic generation (HHG) numerically and analytically. We focus on the influence of Coulomb potential on emission times of HHG associated with specific electron trajectories. By using a numerical procedure based on numerical solution of time-dependent Schrödinger equation (TDSE) in three dimensions, we extract the HHG emission times both for long and short electron trajectories. We compare TDSE predictions with those of a Coulomb-modified model arising from strong-field approximation (SFA). We show that the Coulomb effect induces earlier HHG emission times than those predicted by the general SFA model without considering the Coulomb potential. In particular, this effect influences differently on long and short electron trajectories and is more remarkable for low-energy harmonics than high ones. It also changes the HHG amplitudes for long and short electron trajectories. We validate our discussions with diverse laser parameters and forms of Coulomb potential. Our results strongly support a four-step model of HHG.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 4 (50)]
Creators: name: Francisschinus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1313
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Francisschinus de Monteiotho, consul iustitiae in Pavia, beauftragt Nycolinus Lambertus, eine Urkunde aus dem Jahr 1295 zu beglaubigen, nach der Bertoldinus Litardus, Sohn des verstorbenen Bonacursus, dazu angehalten wird, zur Begleichung der Verbindlichkeiten des genannten Bonacursus und des Barianus de Stata einige Ländereien zu veräußern, die der Zinspflicht gegenüber dem Kloster St. Salvatoris unterliegen.
Inhibition of 5-lipoxygenase-activating protein (FLAP) reduces pulmonary vascular reactivity and pulmonary hypertension in hypoxic rats.
Creators: name: Tuder, R M
name: Voelkel, N F
name: Wade, K
name: Fitzpatrick, F
name: Goulet, J L
name: Höper, M
name: Koller, B H
name: Lepley, R A
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: Chronically elevated shear stress and inflammation are important in hypertensive lung vessel remodeling. We postulate that 5-lipoxygenase (5-LO) is a molecular determinant of these processes. Immunohistology localized the 5-LO to macrophages of normal and chronically hypoxic rat lungs and also to vascular endothelial cells in chronically hypoxic lungs only. In situ hybridization of normal and chronically hypoxic lungs demonstrated that 5-LO mRNA is expressed in macrophages. Rats hypoxic for 4 wk-developed pulmonary hypertension increased translocation of the lung 5-LO from the cytosol to the membrane fraction and increased levels of lung tissue 5-lipoxygenase-activating protein (FLAP). A FLAP ligand, 3-[l-(4-chlorobenzyl)-3-t-butyl-thio-t-isopropylindol-2-yl]-2,2- dimethylpropanoic acid (MK-886), inhibited the acute angiotensin II and hypoxia-induced pulmonary vasoconstriction in vitro and the development of chronic hypoxic pulmonary hypertension in rats in vivo. Mice bred with the deletion of the 5-LO enzyme (5-LO knockout) developed less right heart hypertrophy than age-matched 5-LO competent mice. Our results support the hypothesis that the 5-LO is involved in lung vascular tone regulation and in the development of chronic pulmonary hypertension in hypoxic rodent models.
Regularization of the Hill four-body problem with oblate bodies
Creators: name: Belbruno, Edward
name: Gidea, Marian
name: Lam, Wai-Ting
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider the Hill four-body problem where three oblate, massive bodies form a relative equilibrium triangular configuration, and the fourth, infinitesimal body orbits in a neighborhood of the smallest of the three massive bodies. We regularize collisions between the infinitesimal body and the smallest massive body, via McGehee coordinate transformation. We describe the corresponding collision manifold and show that it undergoes a bifurcation when the oblateness coefficient of the small massive body passes through the zero value.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 6 (114 d)]
Creators: name: Laurentius
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1446
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Laurentius de Mutina, praeco publicus von Mailand, benachrichtigt mit Erlaubnis des Albertus de Gaietanis, seinerseits vicarius und assessor des Podestà von Ferrara, Andrea de Bonromeis de Sancto Miniato, den Notar Libanorius de Curlo, Sohn des Jacobus, aus Ferrara vom Kauf zweier Häuser, gelegen in der contrata St. Mariae de Vado in Ferrara, durch Guido Gonzaga, protonotarius und Sohn des verstorbenen Francesco I. Gonzaga.
Macrospin model of an assembly of magnetically coupled core-shell nanoparticles
Creators: name: Ntallis, Nikolaos
name: Kons, Corisa
name: Srikanth, Hariharan
name: Phan, Manh-Huong
name: Arena, D. A.
name: Pereiro, Manuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Highly sophisticated synthesis methods and experimental techniques allow for precise measurements of magnetic properties of nanoparticles that can be reliably reproduced using theoretical models. Here, we investigate the magnetic properties of ferrite nanoparticles by using theoretical techniques based on Monte Carlo methods. We introduce three stages of sophistication in the macromagnetic model. First, by using tailor-made hamiltonians we study single nanoparticles. In a second stage, the internal structure of the nanoparticle is taken into consideration by defining an internal (core) and external (shell) region, respectively. In the last stage, an assembly of core/shell NPs are considered. All internal magnetic couplings such as inter and intra-atomic exchange interactions or magnetocrystalline anisotropies have been estimated. Moreover, the hysteresis loops of the aforementioned three cases have been calculated and compared with recent experimental measurements. In the case of the assembly of nanoparticles, the hysteresis loops together with the zero-field cooling and field cooling curves are shown to be in a very good agreement with the experimental data. The current model provides an important tool to understand the internal structure of the nanoparticles together with the complex internal spin interactions of the core-shell ferrite nanoparticles.
description: 8 pages, 8 figures
Comment on "Cosmic radio dipole from NVSS and WENSS"
Creators: name: Singal, Ashok K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that a recent purported correction to the effects of Doppler boosting of flux density in an erstwhile published formula for calculating the observer's motion from the cosmic radio dipole in sky brightness is erroneous. The thereby computed downward correction in the estimated magnitude for the observer's motion needs to be scrapped and the results derived therefore need to be reverted back to their erstwhile values.
description: 2 pages
Active learning of reactive Bayesian force fields: Application to heterogeneous hydrogen-platinum catalysis dynamics
Creators: name: Vandermause, Jonathan
name: Xie, Yu
name: Lim, Jin Soo
name: Owen, Cameron J.
name: Kozinsky, Boris
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Accurate modeling of chemically reactive systems has traditionally relied on either expensive ab initio approaches or flexible bond-order force fields such as ReaxFF that require considerable time, effort, and expertise to parameterize. Here, we introduce FLARE++, a Bayesian active learning method for training reactive many-body force fields on the fly during molecular dynamics (MD) simulations. During the automated training loop, the predictive uncertainties of a sparse Gaussian process (SGP) force field are evaluated at each timestep of an MD simulation to determine whether additional ab initio data are needed. Once trained, the SGP is mapped onto an equivalent and much faster model that is polynomial in the local environment descriptors and whose prediction cost is independent of the training set size. We apply our method to a canonical reactive system in the field of heterogeneous catalysis, hydrogen splitting and recombination on a platinum (111) surface, obtaining a trained model within three days of wall time that is twice as fast as a recent Pt/H ReaxFF force field and considerably more accurate. Our method is fully open source and is expected to reduce the time and effort required to train fast and accurate reactive force fields for complex systems.
The Space Density of Intermediate Redshift, Extremely Compact, Massive Starburst Galaxies
Creators: name: Whalen, Kelly E.
name: Hickox, Ryan C.
name: Coil, Alison L.
name: Diamond-Stanic, Aleksandar M.
name: Geach, James E.
name: Moustakas, John
name: Rudnick, Gregory H.
name: Rupke, David S. N.
name: Sell, Paul H.
name: Tremonti, Christy A.
name: Davis, Julie D.
name: Perrotta, Serena
name: Petter, Grayson C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a measurement of the intrinsic space density of intermediate redshift ($z\sim0.5$), massive ($M_{*} \sim 10^{11} \ \text{M}_{\odot}$), compact ($R_{e} \sim 100$ pc) starburst ($Σ_{SFR} \sim 1000 \ \text{M}_{\odot} \ \text{yr}^{-1} \text{kpc}^{-1}$) galaxies with tidal features indicative of them having undergone recent major mergers. A subset of them host kiloparsec scale, $>1000 \ \text{km}\ \text{s}^{-1}$ outflows and have little indication of AGN activity, suggesting that extreme star formation can be a primary driver of large-scale feedback. The aim for this paper is to calculate their space density so we can place them in a better cosmological context. We do this by empirically modeling the stellar populations of massive, compact starburst galaxies. We determine the average timescale for which galaxies that have recently undergone an extreme nuclear starburst would be targeted and included in our spectroscopically selected sample. We find that massive, compact starburst galaxies targeted by our criteria would be selectable for $\sim 148 ^{+27}_{-24}$ Myr and have an intrinsic space density $n_{\text{CS}} \sim (1.1^{+0.5}_{-0.3}) \times 10^{-6} \ \ \text{Mpc}^{-3}$. This space density is broadly consistent with our $z\sim0.5$ compact starbursts being the most extremely compact and star forming low redshift analogs of the compact star forming galaxies in the early Universe as well as them being the progenitors to a fraction of intermediate redshift post starburst and compact quiescent galaxies.
description: 27 pages, 13 figures, accepted for publication in the Astrophysical Journal
Interaction between the insulin-like growth factor family and the integrin receptor family in tissue repair processes. Evidence in a rabbit ear dermal ulcer model.
Creators: name: Clemmons, D R
name: Lin, X
name: Roth, S I
name: Zhao, L L
name: Galiano, R D
name: Mustoe, T A
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: We have determined previously that IGF-I is dependent on the presence of IGF binding protein-1 (IGFBP-1) to act as a wound healing agent. We sought to determine the mechanism whereby IGFBP-1 is able to enhance IGF-I bioactivity. As IGFBP-1 binds both the alpha5beta1 integrin as well as IGF-I in vitro, we asked which of the following interactions were important: (a) the ability of IGFBP-1 to interact with an integrin receptor, and/or (b) the binding of IGF-I by IGFBP-1. We used an IGF-1 analogue (des(1-3)IGF-I) with a > 100-fold reduction in affinity for IGFBP-1 as well as an IGFBP-1 mutant (WGD-IGFBP-1) which does not associate with the alpha5beta1 integrin to selectively abrogate each of these interactions. We also tested the ability of IGFBP-2, a related binding protein which has an arginine-glycine-aspartate sequence but does not associate with integrin family members, to enhance IGF-I bioactivity. Full-thickness dermal wounds were created on rabbit ears; various combinations of native IGF-I, native IGFBP-1, native IGFBP-2, and their respective analogues/mutants were applied to each wound. Wounds were harvested 7 d later for analysis. Only native IGF-I in combination with native IGFBP-1 was effective as a wound healing agent, enhancing reepithelialization and granulation tissue deposition by 64+/-5 and 83+/-12% over controls (P = 0.008 and 0.016, respectively). The same doses of IGF-I/WGD-IGFBP-1, des(1-3)IGF-I/IGFBP-1, and IGF-I/IGFBP-2 were ineffective. We propose that IGF-I physically interacts with IGFBP-1 and that IGFBP-1 also binds to an integrin receptor, most likely the alpha5beta1 integrin. This interaction is unique to IGFBP-1 as the closely related IGFBP-2 had no effect, a finding consistent with its inability to bind to integrin receptors. Our results suggest that activation of both the IGF-I receptor and the alpha5beta1 integrin is required for IGF-I to stimulate wound healing.
Normal luminal bacteria, especially Bacteroides species, mediate chronic colitis, gastritis, and arthritis in HLA-B27/human beta2 microglobulin transgenic rats.
Creators: name: Grenther, W B
name: Ikeda, J S
name: Taurog, J D
name: Sartor, R B
name: Herfarth, H H
name: Balish, E
name: Wilson, K H
name: Rath, H C
name: Hamm, T E
name: Hammer, R E
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: Genetic and environmental factors are important in the pathogenesis of clinical and experimental chronic intestinal inflammation. We investigated the influence of normal luminal bacteria and several groups of selected bacterial strains on spontaneous gastrointestinal and systemic inflammation in HLA-B27 transgenic rats. Rats maintained germfree for 3-9 mo were compared with littermates conventionalized with specific pathogen-free bacteria. Subsequently, germfree transgenic rats were colonized with groups of five to eight bacteria that were either facultative or strictly anaerobic. Transgenic germfree rats had no gastroduodenitis, colitis, or arthritis, but developed epididymitis and dermatitis to the same degree as conventionalized rats. Colonic proinflammatory cytokine expression was increased in transgenic conventionalized rats but was undetectable in germfree and nontransgenic rats. Colitis progressively increased over the first 4 wk of bacterial exposure, then plateaued. Only transgenic rats colonized with defined bacterial cocktails which contained Bacteroides spp. had colitis and gastritis. Normal luminal bacteria predictably and uniformly induce chronic colonic, gastric and systemic inflammation in B27 transgenic F344 rats, but all bacterial species do not have equal activities.