cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Velocity and spatial biases in CDM subhalo distributions
Creators: name: Diemand, Juerg
name: Moore, Ben
name: Stadel, Joachim
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a statistical study of substructure within a sample of LCDM clusters and galaxies simulated with up to 25 million particles. With thousands of subhalos per object we can accurately measure their spatial clustering and velocity distribution functions and compare these with observational data. The substructure properties of galactic halos closely resembles those of galaxy clusters with a small scatter in the mass and circular velocity functions. The velocity distribution function is non-Maxwellian and flat topped with a negative kurtosis of about -0.7. Within the virial radius the velocity bias $b=σ_{\rm sub}/σ_{\rm DM}\sim 1.12 \pm 0.04$, increasing to b > 1.3 within the halo centers. Slow subhalos are much less common, due to physical disruption by gravitational tides early in the merging history. This leads to a spatially anti-biased subhalo distribution that is well fitted by a cored isothermal. Observations of cluster galaxies do not show such biases which we interpret as a limitation of pure dark matter simulations - we estimate that we are missing half of the halo population which has been destroyed by physical overmerging. High resolution hydrodynamical simulations are required to study these issues further. If CDM is correct then the cluster galaxies must survive the tidal field, perhaps due to baryonic inflow during elliptical galaxy formation. Spirals can never exist near the cluster centers and the elliptical galaxies there will have little remaining dark matter. This implies that the morphology-density relation is set {\it before} the cluster forms, rather than a subsequent transformation of disks to S0's by virtue of the cluster environment.
description: MNRAS accepted version. Due to an error in the initial conditions these simulations have a lower sigma_8 than the published value, 0.7 instead of 0.9. We thank Mike Kuhlen who helped us finding this mistake. See the erratum at http://www-theorie.physik.unizh.ch/~diemand/suberr.pdf . Images and movies available at http://www-theorie.physik.unizh.ch/~diemand/clusters/
Manipulation of the emission of colloidal semiconductor nanocrystals employing photonic structures
Creators: name: BERTUCCI, SIMONE
Publisher: name: Università degli studi di Genova
Year: 2025
Subjects: subject: photonic; quantum dots; photoluminescence; dielectric mirror, metasurface,
subject: photonic
subject: quantum dots
subject: photoluminescence
subject: dielectric mirror
subject: metasurface

description: Different photonic structures including block copolymer based self-assembled photonic pigments, chiral metasurfaces and dielectric mirrors are exploited in the manipulation of the emission of both conventional emitters and colloidal semiconductor nanocrystals.
Effective Geometry
Creators: name: Novello, M.
name: Bergliaffa, S. E. Perez
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce the concept of effective geometry by studying several systems in which it arises naturally. As an example of the power and conciseness of the method, it is shown that a flowing dielectric medium with a linear response to an external electric field can be used to generate an analog geometry that has many of the formal properties of a \Sch black hole for light rays, in spite of birefringence. The surface gravity of this analog black hole has a contribution that depends only on the dielectric properties of the fluid (in addition to the usual term dependent on the acceleration). This term may be give a hint to a new mechanism to increase the temperature of Hawking radiation.
description: 13 pages, RevTex4, Contribution to the Proceedings of the Xth Brazilian School of Gravitation and Cosmology, to be published by AIP
Additional file 1 of SHC4 promotes tumor proliferation and metastasis by activating STAT3 signaling in hepatocellular carcinoma
Creators: name: Zhang, Xin
name: Zhang, Hongwei
name: Liao, Zhibin
name: Zhang, Jiacheng
name: Liang, Huifang
name: Wang, Weixing
name: Yu, Jia
name: Dong, Keshuai
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1: Figure S1. SHC4 is overexpressed in HCC tissues and associated with aggressive clinicopathological characteristics. Figure S2. SHC4 knockdown or overexpression in HCC cell lines. Figure S3. STAT3 inhibition blocks the promotive effect of SHC4 on migration, invasion and EMT in HCC cells.
MOESM4 of A robust TDP-43 knock-in mouse model of ALS
Creators: name: Shih-Ling Huang
name: Lien-Szu Wu
name: Lee, Min
name: Chin-Wen Chang
name: Cheng, Wei-Cheng
name: Fang, Yu-Sheng
name: Yun-Ru Chen
name: Cheng, Pei-Lin
name: Che-Kun Shen
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Pharmacology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Additional file 4: Figure S4. Increase of phosphorylated TDP-43 (pTDP-43) in the spinal cord, and loss of NeuN(+) neurons of primary motor cortex of the old N390D/+ male mice.
Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
Creators: name: Mayer, Martin
name: Potapov, Pavel L.
name: Pohl, Darius
name: Steiner, Anja Maria
name: Schultz, Johannes
name: Rellinghaus, Bernd
name: Lubk, Axel
name: König, Tobias A. F.
name: Fery, Andreas
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Chains of metallic nanoparticles sustain strongly confined surface plasmons with relatively low dielectric losses. To exploit these properties in applications,such as waveguides, the fabrication of long chains of low disorder and a thorough understanding of the plasmon-mode properties, such as dispersion relations, are indispensable. Here, we use a wrinkled template for directed self-assembly to assemble chains of gold nanoparticles. With this up-scalable method, chain lengths from two particles (140 nm) to 20 particles (1500 nm) and beyond can be fabricated. Electron energy-loss spectroscopy supported by boundary element simulations, finite-difference time-domain, and a simplified dipole coupling model reveal the evolution of a band of plasmonic waveguide modes from degenerated single-particle modes in detail. In striking difference from plasmonic rod-like structures, the plasmon band is confined in excitation energy, which allows light manipulations below the diffraction limit. The non-degenerated surface plasmon modes show suppressed radiative losses for efficient energy propagation over a distance of 1500 nm.
Additional file 3 of Women’s health behaviour change after receiving breast cancer risk estimates with tailored screening and prevention recommendations
Creators: name: Rainey, Linda
name: van der Waal, Daniëlle
name: Donnelly, Louise S.
name: Southworth, Jake
name: French, David P.
name: Evans, D. Gareth
name: Broeders, Mireille J. M.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 3.
The under-explored radio-loudness of quasars and the possibility of radio-source--environment interactions
Creators: name: Blundell, Katherine
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I demonstrate that radio observations in the literature to date of optically-selected quasars are largely inadequate to reveal the full extent of their jet-activity. I discuss a recent example of an optically-powerful quasar, which is radio-quiet according to all the standard classifications, which Blundell & Rawlings discovered to have a >100 kpc jet, and show that other than being the first FRI quasar to be identified, there is no reason to presume it is exceptional. I also discuss a possible new probe of accounting for the interactions of radio sources with their environments. This tool could help to avoid over-estimating magnetic fields strengths within cluster gas. I briefly describe recent analyses by Rudnick & Blundell which confront claims in the literature of cluster gas B-fields > 10 micro-G.
description: invited talk at "The Physics of Relativistic Jets in the CHANDRA and XMM Era", proceedings edited by G. Brunetti, D.E. Harris, R.M. Sambruna, and G. Setti, to be published in New Astronomy Reviews
Machine learning transfer efficiencies for noisy quantum walks
Creators: name: Melnikov, Alexey A.
name: Fedichkin, Leonid E.
name: Lee, Ray-Kuang
name: Alodjants, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum effects are known to provide an advantage in particle transfer across networks. In order to achieve this advantage, requirements on both a graph type and a quantum system coherence must be found. Here we show that the process of finding these requirements can be automated by learning from simulated examples. The automation is done by using a convolutional neural network of a particular type that learns to understand with which network and under which coherence requirements quantum advantage is possible. Our machine learning approach is applied to study noisy quantum walks on cycle graphs of different sizes. We found that it is possible to predict the existence of quantum advantage for the entire decoherence parameter range, even for graphs outside of the training set. Our results are of importance for demonstration of advantage in quantum experiments and pave the way towards automating scientific research and discoveries.
description: 6 pages, 4 figures
A Redshift Survey of Nearby Galaxy Groups: the Shape of the Mass Density Profile
Creators: name: Mahdavi, A.
name: Geller, M. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We constrain the mass profile and orbital structure of nearby groups and clusters of galaxies. Our method yields the joint probability distribution of the density slope n, the velocity anisotropy beta, and the turnover radius r0 for these systems. The measurement technique does not use results from N-body simulations as priors. We incorporate 2419 new redshifts in the fields of 41 systems of galaxies with z < 0.04. The new groups have median velocity dispersion sigma=360 km/s. We also use 851 archived redshifts in the fields of 8 nearly relaxed clusters with z < 0.1. Within R < 2 r200, the data are consistent with a single power law matter density distribution with slope n = 1.8-2.2 for systems with sigma < 470 km/s, and n = 1.6-2.0 for those with sigma > 470 km/s (95% confidence). We show that a simple, scale-free phase space distribution function f(E,L^2) ~ (-E)^(alpha-1/2) L^(-2 β) is consistent with the data as long as the matter density has a cusp. Using this DF, matter density profiles with constant density cores (n=0) are ruled out with better than 99.7% confidence.
description: 22 pages; accepted for publication in the Astrophysical Journal
Ideal Structure in Free Semigroupoid Algebras from Directed Graphs
Creators: name: Jury, Michael T.
name: Kribs, David W.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47L55, 47L75

description: A free semigroupoid algebra is the weak operator topology closed algebra generated by the left regular representation of a directed graph. We establish lattice isomorphisms between ideals and invariant subspaces, and this leads to a complete description of the weak operator topology closed ideal structure for these algebras. We prove a distance formula to ideals, and this gives an appropriate version of the Caratheodory interpolation theorem. Our analysis rests on an investigation of predual properties, specifically the $A_n$ properties for linear functionals, together with a general Wold Decomposition for $n$-tuples of partial isometries. A number of our proofs unify proofs for subclasses appearing in the literature.
description: 32 pages, J. Operator Theory, to appear
Solar Cycle Variations of p-Mode Frequencies
Creators: name: Chou, Dean-Yi
name: Serebryanskiy, Alexander
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations show that the solar p-mode frequencies change with the solar cycle. The horizontal-phase-velocity dependence of the relative frequency change, scaled by mode mass, provides depth information on the perturbation in the solar interior. We find that the smoothed scaled relative frequency change varies along the solar cycle for horizontal phase velocities higher than a critical value, which corresponds to a depth near the base of the convection zone. This phenomenon suggests that the physical conditions in a region near the base of the convection zone change with the solar cycle.
MOESM3 of A robust TDP-43 knock-in mouse model of ALS
Creators: name: Shih-Ling Huang
name: Lien-Szu Wu
name: Lee, Min
name: Chin-Wen Chang
name: Cheng, Wei-Cheng
name: Fang, Yu-Sheng
name: Yun-Ru Chen
name: Cheng, Pei-Lin
name: Che-Kun Shen
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Additional file 3: Figure S3. Similar levels of Tardbp mRNA expression in different tissues of +/+, A315T/+ and N390D/+ male mice.
Spin Flavor Conversion of Neutrinos in Loop Quantum Gravity
Creators: name: Lambiase, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Loop quantum gravity theory incorporates a new scale length ${\cal L}$ which induces a Lorentz invariance breakdown. This scale can be either an universal constant or can be fixed by the momentum of particles (${\cal L}\sim p^{-1}$). Effects of the scale parameter ${\cal L}$ and helicity terms occurring in the dispersion relation of fermions are reviewed in the framework of spin-flip conversion of neutrino flavors.
description: 7 pages, no figure
The lowest of the low: discovery of SN 2019gsc and the nature of faint Iax supernovae
Creators: name: Srivastav, Shubham
name: Smartt, Stephen J.
name: Leloudas, Giorgos
name: Huber, Mark E.
name: Chambers, Ken
name: Malesani, Daniele B.
name: Hjorth, Jens
name: Gillanders, James H.
name: Schultz, A.
name: Sim, Stuart A.
name: Auchettl, Katie
name: Fynbo, Johan P. U.
name: Gall, Christa
name: McBrien, Owen R.
name: Rest, Armin
name: Smith, Ken W.
name: Wojtak, Radoslaw
name: Young, David R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the discovery and optical follow-up of the faintest supernova-like transient known. The event (SN 2019gsc) was discovered in a star-forming host at 53\,Mpc by ATLAS. A detailed multi-colour light curve was gathered with Pan-STARRS1 and follow-up spectroscopy was obtained with the NOT and Gemini-North. The spectra near maximum light show narrow features at low velocities of 3000 to 4000 km s$^{-1}$, similar to the extremely low luminosity SNe 2010ae and 2008ha, and the light curve displays a similar fast decline (\dmr $0.91 \pm 0.10$ mag). SNe 2010ae and 2008ha have been classified as type Iax supernovae, and together the three either make up a distinct physical class of their own or are at the extreme low luminosity end of this diverse supernova population. The bolometric light curve is consistent with a low kinetic energy of explosion ($E_{\rm k} \sim 10^{49}$ erg s$^{-1}$), a modest ejected mass ($M_{\rm ej} \sim 0.2$ \msol) and radioactive powering by $^{56}$Ni ($M_{\rm Ni} \sim 2 \times 10^{-3}$ \msol). The spectra are quite well reproduced with radiative transfer models (TARDIS) and a composition dominated by carbon, oxygen, magnesium, silicon and sulphur. Remarkably, all three of these extreme Iax events are in similar low-metallicity star-forming environments. The combination of the observational constraints for all three may be best explained by deflagrations of near $M_{\rm Ch}$ hybrid carbon-oxygen-neon white dwarfs which have short evolutionary pathways to formation.
description: 12 pages, 5 figures, accepted to ApJL, minor changes to submitted version
Shock emission in the bipolar post-AGB star IRAS 16594-4656
Creators: name: Van de Steene, G. C.
name: van Hoof, P. A. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we study the near-infrared emission spectrum of IRAS 16594-4656, a bipolar post-AGB star with spectral type B7 and no observed ionization. Using optical and near-infrared photometry we determined the total extinction towards this object to be A_V=7.5 +/- 0.4 mag and derived a distance of 2.2 +/- 0.4 kpc, assuming a luminosity of 10^4 L_sol. The near-infrared spectrum shows strong H_2 emission lines and some typical metastable shock excited lines such as [Fe II] 1.257 & 1.644 micron. We determined the rotational and vibrational excitation temperatures, as well as the ortho-to-para ratio of the molecular hydrogen. Based on these we argue that the H_2 emission is mainly collisionally excited. Line ratios indicate that the H_2 emission originates in a +/- 25 km/s C-type shock. On the other hand, the metastable lines, and especially the [Fe II] emission lines, indicate the presence of a +/- 75 km/s J-type shock. Hence we postulate that the H_2 emission originates where the stellar wind (with an observed terminal velocity of +/- 126 km/s) is funneled through an equatorial density enhancement, impinging almost tangentially upon the circumstellar material. The [Fe II] emission either occurs along the walls of the bipolar lobes where the transverse shock velocity would be higher, or could originate much closer to the central star in shocks in the post-AGB wind itself, or possibly even an accretion disk. Further high resolution near-infrared spectra are currently being obtained to confirm the proposed geometry and kinematics.
description: 10 pages (Latex), 8 figures, accepted for publication by A&A, the ps file is available at http://homepage.oma.be/gsteene/publications.html
MOESM2 of A robust TDP-43 knock-in mouse model of ALS
Creators: name: Shih-Ling Huang
name: Lien-Szu Wu
name: Lee, Min
name: Chin-Wen Chang
name: Cheng, Wei-Cheng
name: Fang, Yu-Sheng
name: Yun-Ru Chen
name: Cheng, Pei-Lin
name: Che-Kun Shen
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Additional file 2: Figure S2. Cognition analysis of N390D/+ male mice.
Modulating Light-Matter Interactions by Quantum Engineering of 2D Materials for Optoelectronics Devices
Creators: name: GUPTA, HARSH
Publisher: name: Università degli studi di Genova
Year: 2025
Subjects: subject: Bound State in the Continuum, Polaritons, Plasmons, hexagonal Boron Nitride, Photonic Crystal, Metasurfaces, Nanolaminate, Nanofabrication
subject: Bound State in the Continuum
subject: Polaritons
subject: Plasmons
subject: hexagonal Boron Nitride
subject: Photonic Crystal
subject: Metasurfaces
subject: Nanolaminate
subject: Nanofabrication

description: The study of light-matter interactions has undergone remarkable transformations over the past century, evolving from classical electrodynamics to modern-day nanophotonics. The advent of two-dimensional (2D) materials has revolutionized this field, enabling the confinement and manipulation of light at scales previously thought impossible. From the discovery of graphene to the exploration of hexagonal boron nitride (hBN) and transition metal dichalcogenides (TMDs), 2D materials have unlocked novel polaritonic phenomena, including plasmon, phonon, and exciton-polaritons. These quasiparticles facilitate sub-wavelength optical confinement, surpassing the diffraction limit and offering new opportunities for photonic applications. Building upon these advancements, this thesis explores the intricate physics of polaritonic modes in 2D materials, with a strong emphasis on Bound States in the Continuum (BICs), topological photonics, and ultraconfined resonances. We begin by establishing the fundamental principles governing phonon, plasmon, and exciton-polaritons in 2D materials. The concept of BICs is then introduced, highlighting their role in achieving lossless optical states and their emergence in hexagonal boron nitride (hBN) within the Reststrahlen bands. Our investigation delves into long-range coupled BICs in the Upper Reststrahlen Band (RB-2) and symmetry-protected topological BICs in the Lower Reststrahlen Band (RB-1), demonstrating their potential in enhancing optical robustness and waveguiding capabilities. Beyond BICs, this thesis explores ultraconfined dielectric resonances in hBN, specifically at frequencies beyond the transverse optical phonon frequency, revealing new regimes of light confinement. The impact of substrate engineering is also examined, where nanolaminate oxide layers enable sub-nanometer phonon-polariton confinement, further expanding the design space for 2D material-based photonics. To experimentally validate these findings, we employ advanced nanofabrication techniques, including electron beam lithography and atomic layer deposition, ensuring precise realization of theoretical predictions. As photonics continues to evolve, the principles outlined in this thesis will serve as a cornerstone for designing future material platforms capable of extreme light confinement and tailored wave interactions.
Spectroscopy of $\mathbf{B_c}$ mesons and the possibility of finding exotic $\mathbf{B_c}$-like structures
Creators: name: Ortega, Pablo G.
name: Segovia, Jorge
name: Entem, David R.
name: Fernandez, Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The bottom-charmed ($B_c$) mesons are more stable than their charmonium ($c\bar c$) and bottomium ($b\bar b$) partners because they cannot annihilate into gluons. However, the low production cross-sections and signal-to-background ratios avoided until now their clear identification. The recent experimental results reported by CMS and LHCb at CERN open the possibility of having a $B_c$ spectrum as complete as the ones of charmonium and bottomonium. Motivated by this expectation, we compute bottom-charmed meson masses in the region energies in which decay meson-meson thresholds are opened, looking for the analogs to the $X(3872)$ in the $B_c$ spectroscopy. We use a constituent quark model in which quark-antiquark degrees of freedom are complemented by four-body Fock states configurations. The model has been applied to a wide range of hadronic observables, in particular to the $X(3872)$, and thus the model parameters are completely constrained. No extra states are found in the $J^P=0^+$ and $J^P=1^+$ sectors. However, in the $J^P=2^+$ sector we found an additional state very close to the $D^*B^*$ threshold which could be experimentally detected.
description: 7 pages, 4 tables
title: Syberyjskie zesłanie jako przestrzeń i miejsce „przeznaczone na zatracenie”
Creators: name: Jędrychowska, Barbara
Publisher: name: Instytut Pedagogiki Uniwersytetu Wrocławskiego
Year: 2021

description: In the Polish history of 19th and 20th century, the concept of Siberia was broad and connected with space but not always that of the geographical sort. A particular part of this space for many was the place of their Siberian exile. The 20thcentury brought this space and the places that were defined by it into an inhuman state. However, even in such circumstances, one could find examples proving that not all of those years were lost. This paper presents two Polish exiles, who were born and lived in two different periods and who were also connected by the space of Siberia, similar values and goals. Their experiences from the place of their Siberian exile serve as a testament that even such a difficult time could be used for “honest living and for the benefit of others.”
MOESM1 of A robust TDP-43 knock-in mouse model of ALS
Creators: name: Shih-Ling Huang
name: Lien-Szu Wu
name: Lee, Min
name: Chin-Wen Chang
name: Cheng, Wei-Cheng
name: Fang, Yu-Sheng
name: Yun-Ru Chen
name: Cheng, Pei-Lin
name: Che-Kun Shen
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Computational Biology

description: Additional file 1: Figure S1. Effects of N390D mutations on the survival of newborn pups and on motor function/ lifespan of N390D/+ female mice.
Non-local effects in the mean-field disc dynamo. I. An asymptotic expansion
Creators: name: Priklonsky, Vladimir
name: Shukurov, Anvar
name: Sokoloff, Dmitry
name: Soward, Andrew
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We reconsider thin-disc global asymptotics for kinematic, axisymmetric mean-field dynamos with vacuum boundary conditions. Non-local terms arising from a small but finite radial field component at the disc surface are consistently taken into account for quadrupole modes. As in earlier approaches, the solution splits into a local part describing the field distribution along the vertical direction and a radial part describing the radial (global) variation of the eigenfunction. However, the radial part of the eigenfunction is now governed by an integro-differential equation whose kernel has a weak (logarithmic) singularity. The integral term arises from non-local interactions of magnetic fields at different radii through vacuum outside the disc. The non-local interaction can have a stronger effect on the solution than the local radial diffusion in a thin disc, however the effect of the integral term is still qualitatively similar to magnetic diffusion.
A new INARMA(1, 1) model with Poisson marginals
Creators: name: Bracher, Johannes
Publisher: name: arXiv
Year: 2019
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We suggest an INARMA(1, 1) model with Poisson marginals which extends the INAR(1) in a similar way as the INGARCH(1, 1) does for the INARCH(1) model. The new model is equivalent to a binomially thinned INAR(1) process. This allows us to obtain some of its stochastic properties and use inference methods for hidden Markov models. The model is compared to various other models in two case studies.
description: This is a pre-print (submitted version before peer review) of a contribution in Steland, A., Rafajlowicz, E., Okhrin, O. (Eds.): Stochastic Models, Statistics and Their Applications, p. 323-333, published by Springer Nature Switzerland, 2019. The final authenticated version is available at https://doi.org/10.1007/978-3-030-28665-1_24
Supplemental materials for preprint: Sources of confusion in global biodiversity trends
Creators: name: Maelys Boennec
Publisher: name: Zenodo
Year: 2023

description: Supplemental materials for preprint: Sources of confusion in global biodiversity trends Including - The extracted papers and reasons for rejection (screening_process_sources_of_confusion.ods) - The final metadata base (metadata_sources_of_confusion.ods) - Supplementrary figures and tables (supplementary_sources_of_confusion.pdf)
The Probability Distribution of Binary Pulsar Coalescence Rate Estimates. II. Neutron Star-White Dwarf Binaries
Creators: name: Kim, Chunglee
name: Kalogera, Vassiliki
name: Lorimer, Duncan R.
name: White, Tiffany
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the statistics of pulsar binaries with white dwarf companions (NS-WD). Using the statistical analysis method developed by Kim et al. (2003) we calculate the Galactic coalescence rate of NS-WD binaries due to gravitational-wave emission. We find that the most likely values for the total Galactic coalescence rate (R_tot) of NS-WD binaries lie in the range 0.2--10 per Myr depending on different assumed pulsar population models. For our reference model, we obtain R_tot=4.11_(-2.56)^(+5.25) per Myr at a 68% statistical confidence level. These rate estimates are not corrected for pulsar beaming and as such they are found to be about a factor of 20 smaller than the Galactic coalescence rate estimates for double neutron star systems. Based on our rate estimates, we calculate the gravitational-wave background due to coalescing NS-WD binaries out to extragalactic distances within the frequency band of the Laser Interferometer Space Antenna. We find the contribution from NS-WD binaries to the gravitational-wave background to be negligible.
description: 20 pages, 2 figures, 2 tables, Accepted for publication in ApJ
Iterative Construction of Gaussian Process Surrogate Models for Bayesian Inference
Creators: name: Alawieh, Leen
name: Goodman, Jonathan
name: Bell, John B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: A new algorithm is developed to tackle the issue of sampling non-Gaussian model parameter posterior probability distributions that arise from solutions to Bayesian inverse problems. The algorithm aims to mitigate some of the hurdles faced by traditional Markov Chain Monte Carlo (MCMC) samplers, through constructing proposal probability densities that are both, easy to sample and that provide a better approximation to the target density than a simple Gaussian proposal distribution would. To achieve that, a Gaussian proposal distribution is augmented with a Gaussian Process (GP) surface that helps capture non-linearities in the log-likelihood function. In order to train the GP surface, an iterative approach is adopted for the optimal selection of points in parameter space. Optimality is sought by maximizing the information gain of the GP surface using a minimum number of forward model simulation runs. The accuracy of the GP-augmented surface approximation is assessed in two ways. The first consists of comparing predictions obtained from the approximate surface with those obtained through running the actual simulation model at hold-out points in parameter space. The second consists of a measure based on the relative variance of sample weights obtained from sampling the approximate posterior probability distribution of the model parameters. The efficacy of this new algorithm is tested on inferring reaction rate parameters in a 3-node and 6-node network toy problems, which imitate idealized reaction networks in combustion applications.
Brassolis isthmia subsp. isthmia isthmia Bates 1864
Creators: name: Bristow, C. Roger
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nymphalidae
Brassolis
Brassolis isthmia
Brassolis isthmia isthmia bates, 1864

description: Brassolis isthmia isthmia Bates, 1864
(Plate 2, figs. 1–4; Plate 3, figs 4–6)
 The description of isthmia was based on two males from Lion Hill, Panamá. In the BMNH Type Collection, there are two males; the one with the additional label ‘figured specimen’ is designated lectotype (Plate 2, figs. 3&4). Male nominate isthmia in Panamá have a distinct orange streak alongside Cu 2 on the hindwing. The range of the nominate taxon is generally regarded as extending from Nicaragua to the Cauca Valley in Colombia (Stichel 1909; 1932). Nominate isthmia, if it does occur in Colombia, is probably confined to the northwest, but I have seen no undoubted specimen from Colombia; there is, however, one male in the MNHN from ‘Cauca’.
description: Published as part of Bristow, C. Roger, 2008, A review of the genus Brassolis Fabricius in Colombia and Ecuador with description of two new taxa (Lepidoptera, Nymphalidae), pp. 47-58 in Zootaxa 1806 (1) on page 49, DOI: 10.11646/zootaxa.1806.1.3, http://zenodo.org/record/5125051
Braneworld inflation driven by dynamics of a bulk scalar field
Creators: name: Himemoto, Yoshiaki
name: Sasaki, Misao
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review a viable alternative scenario of the inflationary universe in the context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics of a 5-dimensional scalar field, which we call a bulk scalar field, plays the central role. Focusing on the second (single-brane) RS model, we discuss braneworld inflation driven by a bulk scalar field without introducing an inflaton on the brane. As a toy model, for the bulk scalar field, we consider a minimally coupled massive scalar field in the 5-dimensional spacetime, and look for a perturbative solution of the field equation in the anti-de Sitter background with an inflating brane. For a suitable range of the model parameters, we find a solution that realizes slow-roll inflation on the brane. When the Hubble parameter on the brane and the mass of a bulk scalar field are much smaller than a typical 5-dimensional mass scale, it is found that this proposed inflation scenario reproduces the standard inflation scenario in the 4-dimensional theory.
description: 10 pages, 1 figure, 1 reference added, typos corrected, to be published in Progress of Theoretical Physics Supplement No. 148 "Brane World: New Perspective in Cosmology"
Discrete quasiperiodic sets with predefined local structure
Creators: name: Cotfas, Nicolae
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 52C23

description: Model sets play a fundamental role in structure analysis of quasicrystals. The diffraction diagram of a quasicrystal admits as symmetry group a finite group G, and there is a G-cluster C (union of orbits of G) such that the quasicrystal can be regarded as a quasiperiodic packing of interpenetrating copies of C. We present an algorithm which leads from any G-cluster C directly to a multi-component model set Q such that the arithmetic neighbours of any point x belonging to Q are distributed on the sites of the translated copy x+C of C. Our mathematical algorithm may be useful in quasicrystal physics.
description: This is the revised version (19 pages, 3 figures) of a paper submitted to Journal of Geometry and Physics. Software for generating quasiperiodic discrete sets available at http://fpcm5.fizica.unibuc.ro/~ncotfas
Brassolis haenschi Stichel. The 1902
Creators: name: Bristow, C. Roger
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nymphalidae
Brassolis
Brassolis haenschi

description: Brassolis haenschi Stichel, 1902
(Plate 1, figs. 1&2; Plate 3, figs 13–15)
 Brassolis haenschi is a rare, high-altitude (900–2000m), species known so far only in the central eastern Andes in Ecuador (nominate haenschi), central Peru (h. rufescens Rothschild) and Venezuela (h. maritimus Stichel). At times, all three taxa have been regarded as subspecies of astyra Godart [1824] (Fruhstorfer 1912b, Rothschild 1916) or even sophorae (Racheli and Racheli 2001). Carla Penz (pers. commn.) informs me that the male genitalia of haenschi (and astyra) show a few, slight, differences from sophorae and isthmia.
 Male haenschi is similar to both isthmia and sophorae. The main difference from these taxa is in the ocelli on the hindwing underside (particularly the lower one). In both sexes of the three haenschi taxa examined (rufescens from Peru, nominate haenschi from Ecuador, and maritimus from Venezuela), the hindwing ocelli lack the narrow, dark brown, border seen in isthmia and sophorae. Additionally, on the forewing underside, the two very narrow submarginal bands which occur in isthmia (very clear on Plate 3, fig. 4) and sophorae are either absent (as in all nominate haenschi examined), or represented by just one (never two) indistinct line (as in a female rufescens from Huancabamba and one male maritimus from Venezuela). These two characters appear to be defining features of haenschi (Plate 3, figs. 13&14).
 The forewing band of nominate haenschi has an almost white ‘highlight’ close to the cell and costal margin (Plate 3, fig. 15); on the hindwing, there is just a very faint, apically developed, sub-marginal band. In the female, there is no sub-marginal hindwing band; the forewing band is a deep orange and composed of a series of touching spots. Where these cross the upper part of the cell, they are elongated distally into ‘flame-like’ spots. On the underside, the outer ocellus on the hindwing does not have an inner, dark brown circle.
 I have seen only the following, Ecuadorian, specimens of nominate haenschi: 2 males ‘Balzapamba’ (BMNH and FLMNH); 1 male Macas (ZMUC) — Plate 1, fig. 2; 1 male Macas (MNHN); 1 male & 1 female ‘Oriente’ AMNH; 1 female Normandia (BMNH) — Plate 1, fig.1); 1 female Macas (ZMUC).
description: Published as part of Bristow, C. Roger, 2008, A review of the genus Brassolis Fabricius in Colombia and Ecuador with description of two new taxa (Lepidoptera, Nymphalidae), pp. 47-58 in Zootaxa 1806 (1) on page 57, DOI: 10.11646/zootaxa.1806.1.3, http://zenodo.org/record/5125051
Triggering mechanism and material transfer of a failed solar filament eruption
Creators: name: Yan, X. L.
name: Xue, Z. K.
name: Cheng, X.
name: Zhang, J.
name: Wang, J. C.
name: Kong, D. F.
name: Yang, L. H.
name: Chen, G. R.
name: Feng, X. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Soar filament eruptions are often associated with solar flares and coronal mass ejections (CMEs), which are the major impacts on space weather. However, the fine structures and the trigger mechanisms of solar filaments are still unclear. To address these issues, we studied a failed solar active-region filament eruption associated with a C-class flare by using high-resolution H$α$ images from the New Vacuum Solar Telescope (NVST), supplemented by EUV observations of the Solar Dynamical Observatory (SDO). Before the filament eruption, a small bi-pole magnetic field emerged below the filament. And then magnetic reconnection between the filament and the emerging bi-pole magnetic field triggered the filament eruption. During the filament eruption, the untwisting motion of the filament can be clearly traced by the eruptive threads. Moreover, the foot-points of the eruptive threads are determined by tracing the descending filament materials. Note that the filament twisted structure and the right part of the eruptive filament threads cannot be seen before the filament eruption. These eruptive threads at the right part of the filament are found to be rooting in the weak negative polarities near the main negative sunspot. Moreover, a new filament formed in the filament channel due to material injection from the eruptive filament. The above observations and the potential field extrapolations are inclined to support that the filament materials were transferred into the overlying magnetic loops and the nearby filament channel by magnetic reconnection. These observations shed light on better understanding on the complexity of filament eruptions.
description: 20 pages, 11 figures, accepted for publication in ApJ
A serendipitous survey for galaxy clusters by the XMM-Newton Survey Science Center
Creators: name: Schwope, A. D.
name: Lamer, G.
name: Burke, D.
name: Elvis, M.
name: Watson, M. G.
name: Schulze, M. P.
name: Szokoly, G.
name: Urrutia, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe the initial results of a programme to detect and identify extended X-ray sources found serendipitously in XMM-Newton observations. We have analysed 186 EPIC-PN images at high galactic latitude with a limiting flux of $1\times 10^{-14}$ \ergcms and found 62 cluster candidates. Thanks to the enhanced sensitivity of the XMM-Newton telescopes, the new clusters found in this pilot study are on the average fainter, more compact, and more distant than those found in previous X-ray surveys. At our survey limit the surface density of clusters is about 5 deg$^{-2}$. We also present the first results of an optical follow-up programme aiming at the redshift measurement of a large sample of clusters. The results of this pilot study give a first glimpse on the potential of serendipitous cluster science with XMM-Newton based on real data. The largest, yet to be fulfilled promise is the identification of a large number of high-redshift clusters for cosmological studies up to $z=1$ or 1.5.
description: Proc World Space Conf. Houston, October 2002, Adv. Space Res., in press
Approximation of Steiner Forest via the Bidirected Cut Relaxation
Creators: name: Çivril, Ali
Publisher: name: arXiv
Year: 2019
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The classical algorithm of Agrawal, Klein and Ravi [SIAM J. Comput., 24 (1995), pp. 440-456], stated in the setting of the primal-dual schema by Goemans and Williamson [SIAM J. Comput., 24 (1995), pp. 296-317] uses the undirected cut relaxation for the Steiner forest problem. Its approximation ratio is $2-\frac{1}{k}$, where $k$ is the number of terminal pairs. A variant of this algorithm more recently proposed by Könemann et al. [SIAM J. Comput., 37 (2008), pp. 1319-1341] is based on the lifted cut relaxation. In this paper, we continue this line of work and consider the bidirected cut relaxation for the Steiner forest problem, which lends itself to a novel algorithmic idea yielding the same approximation ratio as the classical algorithm. In doing so, we introduce an extension of the primal-dual schema in which we run two different phases to satisfy connectivity requirements in both directions. This reveals more about the combinatorial structure of the problem. In particular, there are examples on which the classical algorithm fails to give a good approximation, but the new algorithm finds a near-optimal solution.
description: 15 pages, 5 figures
AI & Simulation to Create a Common Strategic Engineering Framework to Support Sustainability
Creators: name: FERRARI, ROBERTO
Publisher: name: Università degli studi di Genova
Year: 2025
Subjects: subject: Modeling, Simulation, Port, Training, Serious Games, M&S, Oil Spill, Heavy Gas, Intelligent Agents
subject: Modeling
subject: Simulation
subject: Port
subject: Training
subject: Serious Games
subject: M&
subject: S
subject: Oil Spill
subject: Heavy Gas
subject: Intelligent Agents

description: Within the current economic context, ports represent fundamental hubs for global trade, allowing the development of countries' economies. However, the nature of ports and the operations within them makes ports dangerous and complex environments at the same time. Accidents involving dangerous substances could have impacts not only on the port, but also on the surrounding areas. For this reason, training exercises and decision support tools are used to draft emergency plans, to be used when accidents occur. The main purpose of this thesis is to illustrate advantages of introduction of innovative oil spill model and a dense gas diffusion model in the context of decision-making and training in maritime ports, as to support environmental assessment between different scenarios. Having to take into account numerous complex factors, these models have been studied with innovative approaches through the integration of modeling and simulation tools, data analysis and the use of artificial intelligence. The models were finally tested within a seaport simulation system, within predefined scenarios, where models were positively evaluated by the Subject Matter Experts. Therefore, this thesis will first illustrate the port context and associated dangers and hazards, highlight the importance of training and simulation-based decision support tools, and finally detail the development of the two environmental models and results.
Can the state $Y(4626)$ be a $P$-wave tetraquark state $[cs][\bar{c}\bar{s}]$?
Creators: name: Deng, Chengrong
name: Chen, Hong
name: Ping, Jialun
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Stimulated by the state $Y(4626)$ recently reported by Belle Collaboration, we utilize a multiquark color flux-tube model with a multibody confinement potential and one-glue-exchange interaction to make an exhaustive investigation on the diquark-antidiquark state $[cs][\bar{c}\bar{s}]$. Numerical results indicate that the appearance of the states $[cs][\bar{c}\bar{s}]$ like a dumb-bell, the larger the orbital excitation $L$, the more distinguished the shape. The mixing of the color configurations $\left[[cs]_{\bar{\mathbf{3}}_c}[\bar{c}\bar{s}]_{\mathbf{3}_c}\right]_{\mathbf{1}}$ and $\left[[cs]_{\mathbf{6}_c}[\bar{c}\bar{s}]_{\bar{\mathbf{6}}_c}\right]_{\mathbf{1}}$ in the ground states is strong while the color configuration $\left[[cs]_{\bar{\mathbf{3}}_c}[\bar{c}\bar{s}]_{\mathbf{3}_c}\right]_{\mathbf{1}}$ is absolutely predominant in the excited states. The main component of the state $Y(4626)$ can be interpreted as a $P$-wave state $[cs][\bar{c}\bar{s}]$. Its hidden-bottom partner is predicted in the model calculation. The states $X(4140)$, $X(4274)$, $X(4350)$, $X(4500)$ and $X(4700)$ are also discussed.