cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
DenResCov-19: A deep transfer learning network for robust automatic classification of COVID-19, pneumonia, and tuberculosis from X-rays
Creators: name: Mamalakis, Michail
name: Swift, Andrew J.
name: Vorselaars, Bart
name: Ray, Surajit
name: Weeks, Simonne
name: Ding, Weiping
name: Clayton, Richard H.
name: Mackenzie, Louise S.
name: Banerjee, Abhirup
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The global pandemic of COVID-19 is continuing to have a significant effect on the well-being of global population, increasing the demand for rapid testing, diagnosis, and treatment. Along with COVID-19, other etiologies of pneumonia and tuberculosis constitute additional challenges to the medical system. In this regard, the objective of this work is to develop a new deep transfer learning pipeline to diagnose patients with COVID-19, pneumonia, and tuberculosis, based on chest x-ray images. We observed in some instances DenseNet and Resnet have orthogonal performances. In our proposed model, we have created an extra layer with convolutional neural network blocks to combine these two models to establish superior performance over either model. The same strategy can be useful in other applications where two competing networks with complementary performance are observed. We have tested the performance of our proposed network on two-class (pneumonia vs healthy), three-class (including COVID-19), and four-class (including tuberculosis) classification problems. The proposed network has been able to successfully classify these lung diseases in all four datasets and has provided significant improvement over the benchmark networks of DenseNet, ResNet, and Inception-V3. These novel findings can deliver a state-of-the-art pre-screening fast-track decision network to detect COVID-19 and other lung pathologies.
Computation of the string tension in three dimensional Yang-Mills theory using large N reduction
Creators: name: Kiskis, Joe
name: Narayanan, Rajamani
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We numerically compute the string tension in the large N limit of three dimensional Yang-Mills theory using Wilson loops. Space-time loops are formed as products of smeared space-like links and unsmeared time-like links. We use continuum reduction and both unfolded and folded Wilson loops in the analysis.
description: 13 pages, 10 figures, 2 tables, minor changes to the text
Measurement of redshift-space two- and three-point correlation of Ly$α$ absorbers at $1.7< z <3.5$: Implications on evolution of the physical properties of IGM
Creators: name: Maitra, Soumak
name: Srianand, Raghunathan
name: Gaikwad, Prakash
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present redshift space two-point ($ξ$), three-point ($ζ$) and reduced three-point (Q) correlations of Ly$α$ absorbers (Voigt profile components having HI column density, $N_{\rm HI}>10^{13.5}$cm$^{-2}$) over three redshift bins spanning $1.7< z<3.5$ using high-resolution spectra of 292 quasars. We detect positive $ξ$ up to 8 $h^{-1}$ cMpc in all three redshift bins. The strongest detection of $ζ=1.81\pm 0.59$ (with Q$=0.68\pm 0.23$), is in $z=1.7-2.3$ bin at $1-2h^{-1}$ cMpc. The measured $ξ$ and $ζ$ values show an increasing trend with $N_{\rm HI}$, while Q remains relatively independent of $N_{\rm HI}$. We find $ξ$ and $ζ$ to evolve strongly with redshift. Using simulations, we find that $ξ$ and $ζ$ seen in real space may be strongly amplified by peculiar velocities in redshift space. Simulations suggest that while feedback, thermal and pressure smoothing effects influence the clustering of Ly$α$ absorbers at small scales, i.e $<0.5h^{-1}$ cMpc, the HI photo-ionization rate ($Γ_{\rm HI}$) has a strong influence at all scales. The strong redshift evolution of $ξ$ and $ζ$ (for a fixed $N_{\rm HI}$-cutoff) is driven by the redshift evolution of the relationship between $N_{\rm HI}$ and baryon overdensity. Our simulation using best-fitted $Γ_{\rm HI}(z)$ measurements produces consistent clustering signals with observations at $z\sim 2$ but under-predicts the clustering at higher redshifts. One possible remedy is to have higher values of $Γ_{\rm HI}$ at higher redshifts. Alternatively the discrepancy could be related to non-equilibrium and inhomogeneous conditions prevailing during HeII reionization not captured by our simulations.
description: 25 pages, 17 figures; Accepted in MNRAS; Comments welcomed
Nonlinear Fokker-Planck Equation in the Model of Asset Returns
Creators: name: Shapovalov, Alexander
name: Trifonov, Andrey
name: Masalova, Elena
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Finance (q-fin.CP)
subject: Mathematical Physics (math-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: The Fokker-Planck equation with diffusion coefficient quadratic in space variable, linear drift coefficient, and nonlocal nonlinearity term is considered in the framework of a model of analysis of asset returns at financial markets. For special cases of such a Fokker-Planck equation we describe a construction of exact solution of the Cauchy problem. In the general case, we construct the leading term of the Cauchy problem solution asymptotic in a formal small parameter in semiclassical approximation following the complex WKB-Maslov method in the class of trajectory concentrated functions.
description: This is a contribution to the Proc. of the Seventh International Conference ''Symmetry in Nonlinear Mathematical Physics'' (June 24-30, 2007, Kyiv, Ukraine), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Testing for Features in the Primordial Power Spectrum
Creators: name: Hoi, Loison
name: Cline, James M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Well-known causality arguments show that events occurring during or at the end of inflation, associated with reheating or preheating, could contribute a blue component to the spectrum of primordial curvature perturbations, with the dependence k^3. We explore the possibility that they could be observably large in CMB, LSS, and Lyman-alpha data. We find that a k^3 component with a cutoff at some maximum k can modestly improve the fits (Delta chi^2=2.0, 5.4) of the low multipoles (l ~ 10 - 50) or the second peak (l ~ 540) of the CMB angular spectrum when the three-year WMAP data are used. Moreover, the results from WMAP are consistent with the CBI, ACBAR, 2dFGRS, and SDSS data when they are included in the analysis. Including the SDSS galaxy clustering power spectrum, we find weak positive evidence for the k^3 component at the level of Delta chi' = 2.4, with the caveat that the nonlinear evolution of the power spectrum may not be properly treated in the presence of the k^3 distortion. To investigate the high-k regime, we use the Lyman-alpha forest data (LUQAS, Croft et al., and SDSS Lyman-alpha); here we find evidence at the level Delta chi^2' = 3.8. Considering that there are two additional free parameters in the model, the above results do not give a strong evidence for features; however, they show that surprisingly large bumps are not ruled out. We give constraints on the ratio between the k^3 component and the nearly scale-invariant component, r_3 < 1.5, over the range of wave numbers 0.0023/Mpc < k < 8.2/Mpc. We also discuss theoretical models which could lead to the k^3 effect, including ordinary hybrid inflation and double D-term inflation models. We show that the well-motivated k^3 component is also a good representative of the generic spikelike feature in the primordial perturbation power spectrum.
description: 23 pages, 6 figures; added new section on theoretical motivation for k^3 term, and discussion of double D-term hybrid inflation models; title changed, added a new section discussing the generic spikelike features, published in IJMPD
The MEarth project: searching for transiting habitable super-Earths around nearby M-dwarfs
Creators: name: Irwin, Jonathan
name: Charbonneau, David
name: Nutzman, Philip
name: Falco, Emilio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Due to their small radii, M-dwarfs are very promising targets to search for transiting super-Earths, with a planet of 2 Earth radii orbiting an M5 dwarf in the habitable zone giving rise to a 0.5% photometric signal, with a period of two weeks. This can be detected from the ground using modest-aperture telescopes by targeting samples of nearby M-dwarfs. Such planets would be very amenable to follow-up studies due to the brightness of the parent stars, and the favourable planet-star flux ratio. MEarth is such a transit survey of ~2000 nearby M-dwarfs. Since the targets are distributed over the entire (Northern) sky, it is necessary to observe them individually, which will be done by using 8 independent 0.4m robotic telescopes, two of which have been in operation since December 2007 at the Fred Lawrence Whipple Observatory (FLWO) located on Mount Hopkins, Arizona. We discuss the survey design and hardware, and report on the current status of the survey, and preliminary results obtained from the commissioning data.
description: 7 pages, 5 figures. To appear in the Proceedings of the 253rd IAU Symposium: "Transiting Planets", May 2008, Cambridge, MA
Dependence of quantum correlations of twin beams on pump finesse of optical parametric oscillator
Creators: name: Wang, Dong
name: Shang, Yana
name: Jia, Xiaojun
name: Xie, Changde
name: Peng, Kunchi
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dependence of quantum correlation of twin beams on the pump finesse of an optical parametric oscillator is studied with a semi-classical analysis. It is found that the phase-sum correlation of the output signal and idler beams from an optical parametric oscillator operating above threshold depends on the finesse of the pump field when the spurious pump phase noise generated inside the optical cavity and the excess noise of the input pump field are involved in the Langevin equations. The theoretical calculations can explain the previously experimental results, quantitatively.
description: 27 pages, 8 figures
A novel interpretation of the Klein-Gordon equation
Creators: name: Wharton, K. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The covariant Klein-Gordon equation requires twice the boundary conditions of the Schrodinger equation and does not have an accepted single-particle interpretation. Instead of interpreting its solution as a probability wave determined by an initial boundary condition, this paper considers the possibility that the solutions are determined by both an initial and a final boundary condition. By constructing an invariant joint probability distribution from the size of the solution space, it is shown that the usual measurement probabilities can nearly be recovered in the non-relativistic limit, provided that neither boundary constrains the energy to a precision near hbar/T (where T is the time duration between the boundary conditions). Otherwise, deviations from standard quantum mechanics are predicted.
description: v3: Extensively revised version accepted for publication by Found. Phys
A PPMAP analysis of the filamentary structures in Ophiuchus L1688 and L1689
Creators: name: Howard, A. D. P.
name: Whitworth, A. P.
name: Griffin, M. J.
name: Marsh, K. A.
name: Smith, M. W. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the PPMAP (Point Process MAPping) algorithm to re-analyse the \textit{Herschel} and SCUBA-2 observations of the L1688 and L1689 sub-regions of the Ophiuchus molecular cloud. PPMAP delivers maps with high resolution (here $14''$, corresponding to $\sim 0.01\,{\rm pc}$ at $\sim 140\,{\rm pc}$), by using the observations at their native resolutions. PPMAP also delivers more accurate dust optical depths, by distinguishing dust of different types and at different temperatures. The filaments and prestellar cores almost all lie in regions with $N_{\rm H_2}\gtrsim 7\times 10^{21}\,{\rm cm}^{-2}$ (corresponding to $A_{_{\rm V}}\gtrsim 7$). The dust temperature, $T$, tends to be correlated with the dust opacity index, $β$, with low $T$ and low $β$ tend concentrated in the interiors of filaments. The one exception to this tendency is a section of filament in L1688 that falls -- in projection -- between the two B stars, S1 and HD147889; here $T$ and $β$ are relatively high, and there is compelling evidence that feedback from these two stars has heated and compressed the filament. Filament {\sc fwhm}s are typically in the range $0.10\,{\rm pc}$ to $0.15\,{\rm pc}$. Most filaments have line densities in the range $25\,{\rm M_{_\odot}\,pc^{-1}}$ to $65\,{\rm M_{_\odot}\,pc^{-1}}$. If their only support is thermal gas pressure, and the gas is at the canonical temperature of $10\,{\rm K}$, the filaments are highly supercritical. However, there is some evidence from ammonia observations that the gas is significantly warmer than this, and we cannot rule out the possibility of additional support from turbulence and/or magnetic fields. On the basis of their spatial distribution, we argue that most of the starless cores are likely to disperse (rather than evolving to become prestellar).
description: 22 pages, 18 figures, Accepted for publication by MNRAS March 2021
Do we need to know the temperature in prestellar cores?
Creators: name: Pavlyuchenkov, Ya.
name: Henning, Th.
name: Wiebe, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Molecular line observations of starless (prestellar) cores combined with a chemical evolution modeling and radiative transfer calculations are a powerful tool to study the earliest stages of star formation. However, conclusions drawn from such a modeling may noticeably depend on the assumed thermal structure of the cores. The assumption of isothermality, which may work well in chemo-dynamical studies, becomes a critical factor in molecular line formation simulations. We argue that even small temperature variations, which are likely to exist in starless cores, can have a non-negligible effect on the interpretation of molecular line data and derived core properties. In particular, ``chemically pristine'' isothermal cores (low depletion) can have centrally peaked C$^{18}$O and C$^{34}$S radial intensity profiles, while having ring-like intensity distributions in models with a colder center and/or warmer envelope assuming the same underlying chemical structure. Therefore, derived molecular abundances based on oversimplified thermal models may lead to a mis-interpretation of the line data.
description: ApJL, accepted
Column basis reduction, and decomposable knapsack problems
Creators: name: Krishnamoorthy, Bala
name: Pataki, Gabor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 9008, 52C07, 11H06

description: We propose a very simple preconditioning method for integer programming feasibility problems: replacing the problem b' <= Ax <= b, x \in Z^n with b' <= AUy <= b, y \in Z^n, where U is a unimodular matrix computed via basis reduction, to make the columns of $AU$ short and nearly orthogonal. The reformulation is called rangespace reformulation. It is motivated by the reformulation technique proposed for equality constrained IPs by Aardal, Hurkens and Lenstra. We also study a family of IP instances, called decomposable knapsack problems (DKPs). DKPs generalize the instances proposed by Jeroslow, Chvatal and Todd, Avis, Aardal and Lenstra, and Cornuejols et al. DKPs are knapsack problems with a constraint vector of the form $pM + r, $ with $p >0$ and $r$ integral vectors, and $M$ a large integer. If the parameters are suitably chosen in DKPs, we prove 1) hardness results for these problems, when branch-and-bound branching on individual variables is applied; 2) that they are easy, if one branches on the constraint $px$ instead; and 3) that branching on the last few variables in either the rangespace- or the AHL-reformulations is equivalent to branching on $px$ in the original problem. We also provide recipes to generate such instances. Our computational study confirms that the behavior of the studied instances in practice is as predicted by the theoretical results.
Momentum-space entanglement in scalar field theory on fuzzy spheres
Creators: name: Kawamoto, Shoichi
name: Kuroki, Tsunehide
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum field theory defined on a noncommutative space is a useful toy model of quantum gravity and is known to have several intriguing properties, such as nonlocality and UV/IR mixing. They suggest novel types of correlation among the degrees of freedom of different energy scales. In this paper, we investigate such correlations by the use of entanglement entropy in the momentum space. We explicitly evaluate the entanglement entropy of scalar field theory on a fuzzy sphere and find that it exhibits different behaviors from that on the usual continuous sphere. We argue that these differences would originate in different characteristics; non-planar contributions and matrix regularization. It is also found that the mutual information between the low and the high momentum modes shows different scaling behaviors when the effect of a cutoff becomes important.
description: 1+35 pages, 35 figures; Ver.2, minor changes; Ver. 3, added some explanation in Section 4, some paragraphs in Section 5, and some references. Version to appear in JHEP
Time vs. Ensemble Averages for Nonstationary Time Series
Creators: name: McCauley, Joseph L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We analyze the question whether sliding window time averages applied to stationary increment processes converge to a limit in probability. The question centers on averages, correlations, and densities constructed via time averages of the increment x(t,T)=x(t+T)-x(t)and the assumption is that the increment is distributed independently of t. We show that the condition for applying Tchebyshev's Theorem to time averages of functions of stationary increments is strongly violated. We argue that, for both stationary and nonstationary increments, Tchebyshev's Theorem provides the basis for constructing emsemble averages and densities from a single, historic time series if, as in FX markets, the series shows a definite statistical periodicity on the average.
A Precise Estimate of the Radius of HD 149026b
Creators: name: Nutzman, Philip
name: Charbonneau, David
name: Winn, Joshua N.
name: Knutson, Heather A.
name: Fortney, Jonathan J.
name: Holman, Matthew J.
name: Agol, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Spitzer 8 micron transit observations of the extrasolar planet system HD 149026. At this wavelength, transit light curves are weakly affected by stellar limb-darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of R_p/R_s = 0.05158 +/- 0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination of i = 85.4 +0.9/-0.8 deg. and a planet radius of 0.755 +/- 0.040 Jupiter radii. These measurements further support models in which the planet is greatly enriched in heavy elements.
description: To appear in the Proceedings of the 253rd IAU Symposium: "Transiting Planets", May 2008, Cambridge, MA
A note on late-time tails of spherical nonlinear waves
Creators: name: Bizoń, Piotr
name: Chmaj, Tadeusz
name: Rostworowski, Andrzej
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the long-time behavior of small amplitude solutions of the semilinear wave equation $\Box ϕ=ϕ^p$ in odd $d\geq 5$ spatial dimensions. We show that for the quadratic nonlinearity ($p=2$) the tail has an anomalously small amplitude and fast decay. The extension of the results to more general nonlinearities involving first derivatives is also discussed.
description: 7 pages
title: Unusual neurovascular compressive lesions around the knee: A pictorial review of key anatomy and imaging findings
Creators: name: Paramesparan, KETHESPARAN
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Musculoskeletal joint
subject: Musculoskeletal soft tissue
subject: Anatomy
subject: MR
subject: CT
subject: Ultrasound
subject: Imaging sequences
subject: Education
subject: Cysts
subject: Trauma
subject: Pathology

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: 1) Review key anatomy of the neurovascular structures at the knee joint. 2) Describe the radiological findings of unusual compressive lesions that involve the neurovascular structures of the...
Mapping Class Groups and Interpolating Complexes: Rank
Creators: name: Mj, Mahan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F67 (Primary), 22E40

description: A family of interpolating graphs $\calC (S, ξ)$ of complexity $ξ$ is constructed for a surface $S$ and $-2 \leq ξ\leq ξ(S)$. For $ξ= -2, -1, ξ(S) -1$ these specialise to graphs quasi-isometric to the marking graph, the pants graph and the curve graph respectively. We generalise Theorems of Brock-Farb and Behrstock-Minsky to show that the rank of $\calC (S, ξ)$ is $r_ξ$, the largest number of disjoint copies of subsurfaces of complexity greater than $ξ$ that may be embedded in $S$. The interpolating graphs $\calC (S, ξ)$ interpolate between the pants graph and the curve graph.
description: v2 Final version incorporating refree comments 16pgs no figs
title: Role of Imaging in Osteonecrosis (Avascular Necrosis) of Hip
Creators: name: Jain, Amit
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Diagnostic procedure
subject: MR
subject: Musculoskeletal system

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: The main learning objectives are: ·To understand the pathophysiology of osteonecrosis of hip ·To evaluate the role of various imaging modalities in the condition ·To be able to grade the severity of the disease by...
Grzegorz Łukomski, Wojna domowa. Z dziejów konfliktu polsko-litewskiego 1918-1920
Creators: name: Przeniosło, Marek
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2000

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 49 Nr. 1 (2000)
title: Forgotten joints of sero-negative arthritis – Key findings
Creators: name: Paramesparan, KETHESPARAN
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Musculoskeletal joint
subject: Musculoskeletal bone
subject: Musculoskeletal system
subject: MR
subject: Conventional radiography
subject: Ultrasound
subject: Education
subject: Arthritides
subject: Inflammation
subject: Infection

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: 1) Updates on the current classification criteria for peripheral seronegative spondyloarthritis (SpA). 2) Highlight imaging features of seronegative arthritis in non-axial joints that the radiologist should be aware...
title: Dual-Energy CT and Pelvic Fractures: a review
Creators: name: Rhodes, Nicholas
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Trauma
subject: Imaging sequences
subject: CT
subject: Musculoskeletal bone

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: 1. Understand DE CT for fracture detection. 2. Understand potential benefits of DE CT for fracture evaluation. 3. Understand limitations of DE CT for fracture...
title: Location, Location, Location (revisted): Imaging of Calcium Pyrophosphate Dihydrate Crystal Deposition Disease
Creators: name: Bielecki, Dennis
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Musculoskeletal joint
subject: Musculoskeletal system
subject: Digital radiography
subject: CT
subject: MR
subject: Education
subject: eLearning
subject: Arthritides
subject: Education and training
subject: Pathology

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: To understand the classification of crystal deposition diseases. To learn the pathophysiology of this disorder. To understand the clinical manifestations of this disorder. To learn the radiographic distribution and appearance using example...
Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts
Creators: name: Nagaev, K. E.
name: Ayvazyan, O. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the corrections to the Sharvin conductance of ballistic multimode microcontacts that result from electron--electron scattering in the leads. Using a semiclassical Boltzmann equation, we obtain that these corrections are {\it positive} and scale with temperature as $T^2\ln(E_F/T)$ for three-dimensional contacts and as $T$ for two-dimensional ones. These results are relevant to recent experiments on 2DEG contacts.
description: 4 pages, 2 figures, published version
Regularity results for the Primitive Equations of the ocean
Creators: name: Nodet, Maëlle
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q35

description: We consider the linear Primitive Equations of the ocean in the three dimensional space, with horizontal periodic and vertical Dirichlet boundary conditions. Thanks to Fourier transforms we are able to calculate explicitly the pressure term. We then state existence, unicity and regularity results for the linear time-depending Primitive Equations, with low-regularity right-hand side.
description: 36 pages
title: Soft tissue sarcomas of the extremities - imaging and surgical planning
Creators: name: Mota Louro, João
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Neoplasia
subject: Surgery
subject: MR
subject: Musculoskeletal soft tissue

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: To review the most important imaging findings for surgical planning that should be evaluated during the locoregional staging of Soft Tissue Sarcomas (STS) of the...
Observation of electrically tunable Feshbach resonances in twisted bilayer semiconductors
Creators: name: Schwartz, Ido
name: Shimazaki, Yuya
name: Kuhlenkamp, Clemens
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Kroner, Martin
name: Imamoğlu, Ataç
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Moire superlattices in twisted transition metal dichalcogenide bilayers have emerged as a rich platform for exploring strong correlations using optical spectroscopy. Despite observation of rich Mott-Wigner physics stemming from an interplay between the periodic potential and Coulomb interactions, the absence of tunnel coupling induced hybridization of electronic states ensured a classical layer degree of freedom in these experiments. Here, we investigate a MoSe$_2$ homobilayer structure where inter-layer coherent tunnelling and layer-selective optical transitions allow for electric field controlled manipulation and measurement of the layer-pseudospin of the ground-state holes. A striking example of qualitatively new phenomena in this system is our observation of an electrically tunable 2D Feshbach resonance in exciton-hole scattering, which allows us to control the strength of interactions between excitons and holes located in different layers. Our findings enable hitherto unexplored possibilities for optical investigation of many-body physics, as well as realization of degenerate Bose-Fermi mixtures with tunable interactions, without directly exposing the itinerant fermions to light fields.
description: Main text: 9 pages, 4 figures; Supplementary Material: 9 pages, 7 figures
Entanglement Transfer Through an Antiferromagnetic Spin Chain
Creators: name: Bayat, Abolfazl
name: Bose, Sugato
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the possibility of using an uniformly coupled finite antiferromagnetic spin-1/2 Heisenberg chain as a channel for transmitting entanglement. One member of a pair of maximally entangled spins is initially appended to one end of a chain in its ground state and the dynamical propagation of this entanglement to the other end is calculated. We show that compared to the analogous scheme with a ferromagnetic chain in its ground state, here the entanglement is transmitted faster, with less decay, with a much higher purity and as a narrow pulse form rising non-analytically from zero. Here non-zero temperatures and depolarizing environments are both found to be less destructive in comparison to the ferromagnetic case. The entanglement is found to propagate through the chain in a peculiar fashion whereby it hops to skip alternate sites.
description: 5 pages, 5 figures. Modified version with more explanation
Simona Bertacco (ed.), Language and Translation in Postcolonial Literature (Abingdon, Routledge, 2014, 248 pp. ISBN 978-0415656047)
Creators: name: Vallorani, Nicoletta
Publisher: name: Università degli  Studi di Milano
Year: 2014

description: Simona Bertacco (ed.), Language and Translation in Postcolonial Literature
(Abingdon, Routledge, 2014, 248 pp. ISBN 978-0415656047)
description: Altre Modernità, No 12 (2014): MANDELA
Citizen science on urban mobility - A practitioner's guide to evaluation, engagement and policy change
Creators: name: Sardo, Margarida
name: Laggan, Sophie
name: Bracke, Anke
name: Franchois, Elke
name: Maccanni, Giovanni
Publisher: name: Zenodo
Year: 2021
Subjects: citizen science, guide

description: This guide emerged from the WeCount project and sets out to scale general guidelines for evaluating similar citizen science projects for improved urban mobility, and draw best practice models for engagement and policy recommendations. It accompanies WeCount Deliverable 5.4 Part A - Final Summative Monitoring & Evaluation Project Report .
title: Pictorial Review of Radiographically Occult Hip Fractures
Creators: name: Kallampallil, Jins
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Pelvis
subject: CT
subject: MR
subject: Diagnostic procedure
subject: Trauma

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: To recognise the common injury patterns seen in radiographically occult hip...
REVOLUÇÃO CÓSMICA - COMETAS, NANOTECNOLOGIA E BIOPRINTING NA EXPLORAÇÃO ESPACIAL
Creators: name: Brandl, Edenilson
Publisher: name: Zenodo
Year: 2023
Subjects: NASA
Cometas
Exploração espacial
Nanotecnologia
Bioprinting
Sistema solar
Química interplanetária
Saúde espacial
Ciência médica no espaço
Nanomateriais,
Medicina regenerativa interplanetária

description: Este artigo explora a convergência de três áreas distintas - cometas, nanotecnologia e bioprinting - na vanguarda da exploração espacial. Os cometas, como reveladores da composição inicial do sistema solar, são peças-chave na decifração de segredos cósmicos. A nanotecnologia emerge como uma força propulsora, otimizando espaçonaves e abrindo novas fronteiras na exploração espacial. O bioprinting, por sua vez, promete transformar a medicina regenerativa no espaço, com implicações significativas para a saúde dos astronautas. Essas áreas interconectadas não apenas expandem nosso entendimento do universo, mas também moldam o futuro da exploração espacial, unindo ciência, engenharia e medicina além dos limites terrestres.

 

 

This article explores the convergence of three distinct areas – comets, nanotechnology and bioprinting – at the forefront of space exploration. Comets, as revealers of the initial composition of the solar system, are key players in deciphering cosmic secrets. Nanotechnology emerges as a driving force, optimizing spacecraft and opening new frontiers in space exploration. Bioprinting, in turn, promises to transform regenerative medicine in space, with significant implications for the health of astronauts. These interconnected areas not only expand our understanding of the universe, but also shape the future of space exploration, uniting science, engineering and medicine beyond Earth's boundaries.
title: Terminology regarding instability of the long head of the biceps- what is correct? A systematic and pictorial review.
Creators: name: Sadat Akhavi, Mehdi
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Anatomy
subject: MR
subject: Structured reporting
subject: Trauma

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The long head ofthe biceps tendon (LHBT)is a common cause of shoulder pain and impaired function. The terminology used for location of LHBT in regard to the intertubercular sulcus is unclear.Subluxation(SUB), displacement and dislocations(DIS) are...
Systematic study of trace radioactive impurities in candidate construction materials for EXO-200
Creators: name: Leonard, D. S.
name: Grinberg, P.
name: Weber, P.
name: Baussan, E.
name: Djurcic, Z.
name: Keefer, G.
name: Piepke, A.
name: Pocar, A.
name: Vuilleumier, J. -L.
name: Vuilleumier, J. -M.
name: Akimov, D.
name: Bellerive, A.
name: Bowcock, M.
name: Breidenbach, M.
name: Burenkov, A.
name: Conley, R.
name: Craddock, W.
name: Danilov, M.
name: DeVoe, R.
name: Dixit, M.
name: Dolgolenko, A.
name: Ekchtout, I.
name: Fairbank, W.
name: Farine, J.
name: Fierlinger, P.
name: Flatt, B.
name: Gratta, G.
name: Green, M.
name: Hall, C.
name: Hall, K.
name: Hallman, D.
name: Hargrove, C.
name: Herbst, R.
name: Hodgson, J.
name: Jeng, S.
name: Kolkowitz, S.
name: Kovalenko, A.
name: Kovalenko, D.
name: LePort, F.
name: Mackay, D.
name: Moe, M.
name: Díez, M. Montero
name: Neilson, R.
name: Odian, A.
name: O'Sullivan, K.
name: Ounalli, L.
name: Prescott, C. Y.
name: Rowson, P. C.
name: Schenker, D.
name: Sinclair, D.
name: Skarpaas, K.
name: Smirnov, G.
name: Stekhanov, V.
name: Strickland, V.
name: Virtue, C.
name: Wamba, K.
name: Wodin, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Enriched Xenon Observatory (EXO) will search for double beta decays of 136Xe. We report the results of a systematic study of trace concentrations of radioactive impurities in a wide range of raw materials and finished parts considered for use in the construction of EXO-200, the first stage of the EXO experimental program. Analysis techniques employed, and described here, include direct gamma counting, alpha counting, neutron activation analysis, and high-sensitivity mass spectrometry.
description: 32 pages, 6 figures. Expanded introduction, added missing table entry. Accepted for publication in Nucl. Instrum. Meth. A
Marian Stolarczyk, Działalność Lwowskiej Centralnej Rady Narodowej
Creators: name: Golczewski, Frank
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 1998

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 47 Nr. 3 (1998)
Small-scale Flux Emergence, Coronal Hole Heating, and Flux-tube Expansion: A Hybrid Solar Wind Model
Creators: name: Wang, Y. -M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Extreme-ultraviolet images from the Solar Dynamics Observatory often show looplike fine structure to be present where no minority-polarity flux is visible in magnetograms, suggesting that the rate of ephemeral region (ER) emergence inside "unipolar" regions has been underestimated. Assuming that this rate is the same inside coronal holes as in the quiet Sun, we show that interchange reconnection between ERs and open field lines gives rise to a solar wind energy flux that exceeds 10$^5$ erg cm$^{-2}$ s$^{-1}$ and that scales as the field strength at the coronal base, consistent with observations. In addition to providing Ohmic heating in the low corona, these reconnection events may be a source of Alfv{é}n waves with periods ranging from the granular timescale of $\sim$10 minutes to the supergranular/plume timescale of many hours, with some of the longer-period waves being reflected and dissipated in the outer corona. The asymptotic wind speed depends on the radial distribution of the heating, which is largely controlled by the rate of flux-tube expansion. Along the rapidly diverging flux tubes associated with slow wind, heating is concentrated well inside the sonic point (1) because the outward conductive heat-flux density and thus the outer coronal temperatures are reduced, and (2) because the net wave energy flux is dissipated at a rate proportional to the local Alfv{é}n speed. In this "hybrid" solar wind model, reconnection heats the lower corona and drives the mass flux, whereas waves impart energy and momentum to the outflow at greater distances.
title: Subcutaneous panniculitis-like T-Cell lymphoma presenting with huge masses on both cruri
Creators: name: Sanal, Hatice Tuba
Publisher: name: European Society of Muscoskeletal Radiology
Year: 2019
Subjects: subject: Lymphoma
subject: Diagnostic procedure
subject: MR
subject: Musculoskeletal bone

description: Learning objectives Background Imaging findings OR Procedure Details Conclusion References Personal Information
description: Learning objectives: To remind the readers arare entity of subcutaneous panniculitis-like T-cell lymphoma in patients presenting withbilateral huge leg masses along with infectious etiologies and other...
Contributions from primordial non-Gaussianity and General Relativity to the galaxy power spectrum
Creators: name: Martinez-Carrillo, Rebeca
name: Hidalgo, Juan Carlos
name: Malik, Karim A.
name: Pourtsidou, Alkistis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compute the real space galaxy power spectrum, including the leading order effects of General Relativity and primordial non-Gaussianity from the $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$ parameters. Such contributions come from the one-loop matter power spectrum terms dominant at large scales, and from the factors of the non-linear bias parameter $b_{\mathrm{NL}}$ (akin to the Newtonian $b_ϕ$). We assess the detectability of these contributions in Stage-IV surveys. In particular, we note that specific values of the bias parameter may erase the primordial and relativistic contributions to the configuration space power spectrum.
description: Version accepted for publication in JCAP
Controlling transition probability from matter-wave soliton to chaos
Creators: name: Zhu, Qianquan
name: Hai, Wenhua
name: Rong, Shiguang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For a Bose-Einstein condensate loaded into a weak traveling optical superlattice it is demonstrated that under a stochastic initial set and in a given parameter region the solitonic chaos appears with a certain probability. Effects of the lattice depths and wave vectors on the chaos probability are investigated analytically and numerically, and different chaotic regions associated with different chaos probabilities are found. The results suggest a feasible method for eliminating or strengthening chaos by modulating the moving superlattice experimentally.
description: 4 pages, 2 figures
České země ve stínu půlměsíce. Obraz Turka v raně novověké literatuře z českých zemí
Creators: name: Bahlcke, Joachim
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2004

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 53 Nr. 1 (2004)
Impurity resonance states in electron-doped high T_c superconductors
Creators: name: Wan, Yuan
name: Lv, Hai-Dong
name: Lu, Hong-Yan
name: Wang, Qiang-Hua
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two scenarios, i.e., the anisotropic s-wave pairing (the s-wave scenario) and the d-wave pairing coexisting with antiferromagnetism (the coexisting scenario) have been introduced to understand some of seemingly s-wave like behaviors in electron doped cuprates. We considered the electronic structure in the presence of a nonmagnetic impurity in the coexistence scenario. We found that even if the AF order opens a full gap in quasi-particle excitation spectra, the mid-gap resonant peaks in local density of states (LDoS) around an impurity can still be observed in the presence of a d-wave pairing gap. The features of the impurity states in the coexisting phase are markedly different from the pure AF or pure d-wave pairing phases, showing the unique role of the coexisting AF and d-wave pairing orders. On the other hand, it is known that in the pure s-wave case no mid-gap states can be induced by a nonmagnetic impurity. Therefore we proposed that the response to a nonmagnetic impurity can be used to differentiate the two scenarios.
description: 5 pages, two-column revtex4, 5 figures, author list corrected
Electrostatics: Fixed Point Charges and Polarization
Creators: name: Gilson, Michael K.
name: Jang, Hyesu
name: Nerenberg, Paul S.
name: Schauperl, Michael
name: Wang, Lee Ping
Publisher: name: Zenodo
Year: 2019
Subjects: Open Force Field Initiative
force fields
charges
RESP
AM1-BCC
electrostatics
fitting

description: Michael Schauperl and Hyesu Jang describe how molecules will be parameterized for fixed charge and polarizable SMIRNOFF force fields at Open Force Field Consortium Workshop in San Diego, Jan 8 2019.
Making high-quality quantum microwave devices with van der Waals superconductors
Creators: name: Antony, Abhinandan
name: Gustafsson, Martin V.
name: Rajendran, Anjaly
name: Benyamini, Avishai
name: Ribeill, Guilhem
name: Ohki, Thomas A.
name: Hone, James
name: Fong, Kin Chung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ultra low-loss microwave materials are crucial for enhancing quantum coherence and scalability of superconducting qubits. Van der Waals (vdW) heterostructure is an attractive platform for quantum devices due to the single-crystal structure of the constituent two-dimensional (2D) layered materials and the lack of dangling bonds at their atomically sharp interfaces. However, new fabrication and characterization techniques are required to determine whether these structures can achieve low loss in the microwave regime. Here we report the fabrication of superconducting microwave resonators using NbSe$_2$ that achieve a quality factor $Q > 10^5$. This value sets an upper bound that corresponds to a resistance of $\leq 192 μΩ$ when considering the additional loss introduced by integrating NbSe$_2$ into a standard transmon circuit. This work demonstrates the compatibility of 2D layered materials with high-quality microwave quantum devices.
description: 5 pages, 6 figures, 1 table
Analysis of the $B\to a_1(1260)$ form-factors with light-cone QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we calculate the $B\to a_1(1260)$ form-factors $V_1(q^2)$, $V_2(q^2)$, $V_3(q^2)$ and $A(q^2)$ with the $B$-meson light-cone QCD sum rules. Those form-factors are basic parameters in studying the exclusive non-leptonic two-body decays $B\to AP$ and semi-leptonic decays $B\to A l ν_l$, $B\to A \bar{l}l$. Our numerical results are consistent with the values from the (light-cone) QCD sum rules. The main uncertainty comes from the parameter $ω_0$ (or $λ_B$), which determines the shapes of the two-particle and three-particle light-cone distribution amplitudes of the $B$ meson, it is of great importance to refine this parameter.
description: 12 pages, 3 figures, 4-version, slight revision
Die Deutschen im staatlichen Sektor des öffentlichen Lebens in Großpolen, Westpreußen und Oberschlesien nach dem Ersten Weltkrieg
Creators: name: Wanatowicz, Maria Wanda
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 1999

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 48 Nr. 4 (1999)
Shifting computational boundaries for complex organic materials
Creators: name: Geilhufe, R. Matthias
name: Olsthoorn, Bart
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Methodology adapted from data science sparked the field of materials informatics, and materials databases are at the heart of it. Applying artificial intelligence to these databases will allow the prediction of properties of complex organic crystals.
description: 5 pages, 2 figures