cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Comparison of whole body diffusion-weighted MRI (WB DWI) and skeletal scintigraphy in metastases detection - in 73 patients with prostate or breast carcinoma
Creators: name: Luczynska, Elzbieta
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Comparative studies
subject: Nuclear medicine conventional
subject: MR-Diffusion/Perfusion
subject: MR
subject: Oncology
subject: Cancer

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The main goal of this study was to compare the diagnostic accuracy of diffusion-weighted whole body MR imaging (WB DWI) with skeletal scintigraphy for the detection of metastasis and therapy control in patients suffering from prostate or breast...
On the Number of Facets of Polytopes Representing Comparative Probability Orders
Creators: name: Chevyrev, Ilya
name: Searles, Dominic
name: Slinko, Arkadii
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 51 M20, 32 S22, 60 A99

description: Fine and Gill (1973) introduced the geometric representation for those comparative probability orders on n atoms that have an underlying probability measure. In this representation every such comparative probability order is represented by a region of a certain hyperplane arrangement. Maclagan (1999) asked how many facets a polytope, which is the closure of such a region, might have. We prove that the maximal number of facets is at least F_{n+1}, where F_n is the nth Fibonacci number. We conjecture that this lower bound is sharp. Our proof is combinatorial and makes use of the concept of flippable pairs introduced by Maclagan. We also obtain an upper bound which is not too far from the lower bound.
description: 13 pages
Operator reflection positivity inequalities and their applications to interacting quantum rotors
Creators: name: Wojtkiewicz, Jacek
name: Pusz, Wiesław
name: Stachura, Piotr
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the Reflection Positivity theory and its application to statistical mechanical systems, certain matrix inequalities play a central role. The Dyson-Lieb-Simon and Kennedy-Lieb-Shastry-Schupp inequalities constitute prominent examples. In this paper we extend the KLS-S inequality to the case where matrices are replaced by certain operators. As an application, we prove the occurrence of the long range order in the ground state of two-dimensional quantum rotors.
description: 20 pages, one figure
A pancake droplet translating in a Hele-Shaw cell: lubrication film and flow field
Creators: name: Zhu, Lailai
name: Gallaire, François
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We adopt a boundary integral method to study the dynamics of a translating droplet confined in a Hele-Shaw cell in the Stokes regime. The droplet is driven by the motion of the ambient fluid with the same viscosity. We characterize the three-dimensional (3D) nature of the droplet interface and of the flow field. The interface develops an arc-shaped ridge near the rear-half rim with a protrusion in the rear and a laterally symmetric pair of higher peaks; this pair of protrusions has been identified by recent experiments (Huerre et al., Phys. Rev. Lett., vol. 115 (6), 2015, 064501) and predicted asymptotically (Burgess and Foster, Phys. Fluids A, vol. 2 (7), 1990, pp. 1105-1117). The mean film thickness is well predicted by the extended Bretherton model (Klaseboer et al., Phys. Fluids, vol. 26 (3), 2014, 032107) with fitting parameters. The flow in the streamwise wall-normal middle plane is featured with recirculating zones, which are partitioned by stagnation points closely resembling those of a two-dimensional droplet in a channel. Recirculation is absent in the wall-parallel, unconfined planes, in sharp contrast to the interior flow inside a moving droplet in free space. The preferred orientation of the recirculation results from the anisotropic confinement of the Hele-Shaw cell. On these planes, we identify a dipolar disturbance flow field induced by the travelling droplet and its $1/r^2$ spatial decay is confirmed numerically. We pinpoint counter-rotating streamwise vortex structures near the lateral interface of the droplet, further highlighting the complex 3D flow pattern.
Anomalous minimum and scaling behavior of localization length near an isolated flat band
Creators: name: Ge, Li
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using one-dimensional tight-binding lattices and an analytical expression based on the Green's matrix, we show that anomalous minimum of the localization length near an isolated flat band, previously found for evanescent waves in a defect-free photonic crystal waveguide, is a generic feature and exists in the Anderson regime as well, i.e., in the presence of disorder. Our finding reveals a scaling behavior of the localization length in terms of the disorder strength, as well as a summation rule of the inverse localization length in terms of the density of states in different bands. Most interesting, the latter indicates the possibility of having two localization minima inside a band gap, if this band gap is formed by two flat bands such as in a double-sided Lieb lattice.
description: 8 pages, 10 figures
title: Pleomorphic carcinoma of the lung: which CT findings predict poor prognosis?
Creators: name: Fujisaki, Akitaka
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: CT
subject: Lung
subject: Surgery
subject: Cancer

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Background Pleomorphic carcinoma (PC) is a subtype of sarcomatoid carcinoma that contains a component of sarcoma or sarcoma-like (spindle and/or giant cell) differentiation. According to the criteria of the World Health Organization (WHO)...
Anomalous dynamic behaviour of optically trapped high aspect ratio nanowires
Creators: name: Toe, Wen Jun
name: Piwonka, Ignacio O.
name: Angstmann, Christopher
name: Gao, Qiang
name: Tan, Hark Hoe
name: Jagadish, Chennupati
name: Henry, Bruce
name: Reece, Peter J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the dynamics of high aspect ratio nanowires trapped axially in a single gradient force optical tweezers. A power spectrum analysis of the Brownian dynamics reveals a broad spectral resonance of the order of a kHz with peak properties that are strongly dependent on the input trapping power. Modelling of the dynamical equations of motion of the trapped nanowire that incorporate non-conservative effects through asymmetric coupling between translational and rotational degrees of freedom provides excellent agreement with the experimental observations. An associated observation of persistent cyclical motion around the equilibrium trapping position using winding analysis provides further evidence for the influence of non-conservative forces.
title: The imaging spectrum of ectopic/accessory organs in the abdomen
Creators: name: Onishi, Yasuyuki
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Normal variants
subject: Ultrasound
subject: MR
subject: CT
subject: Abdomen
subject: Neoplasia
subject: Cysts

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: 1) To learn the imaging spectrum of a wide variety of ectopic/accessory organs. 2) To learn the characteristic imaging features for differentiating these conditions from neoplastic...
title: Diagnostic Accuracy of Shoulder USS for Rotator Cuff Tears Based on Referrers.
Creators: name: Iqbal, Aamer
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Education and training
subject: Audit and standards
subject: Ultrasound
subject: Musculoskeletal soft tissue
subject: Musculoskeletal joint

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The objectives of this study were to compare the accuaracy of clinical diagnosis of Full Thickness Rotator Cuff Tears between staff inthe Emergency Department and Advanced Physiotherapist Practitioners. Is there a possibility to streamline the...
A note on generators of the endomorphism semigroup of an infinite countable chain
Creators: name: Dimitrova, Ilinka
name: Fernandes, Vítor H.
name: Koppitz, Jörg
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 20M20, 20M10

description: In this note, we consider the semigroup $O(X)$ of all order endomorphisms of an infinite chain $X$ and the subset $J$ of $O(X)$ of all transformations $α$ such that $|Im(α)|=|X|$. For an infinite countable chain $X$, we give a necessary and sufficient condition on $X$ for $O(X) = \langle J \rangle$ to hold. We also present a sufficient condition on $X$ for $O(X) = \langle J \rangle$ to hold, for an arbitrary infinite chain $X$.
Stability from graph symmetrisation arguments with applications to inducibility
Creators: name: Liu, Hong
name: Pikhurko, Oleg
name: Sharifzadeh, Maryam
name: Staden, Katherine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We present a sufficient condition for the stability property of extremal graph problems that can be solved via Zykov's symmetrisation. Our criterion is stated in terms of an analytic limit version of the problem. We show that, for example, it applies to the inducibility problem for an arbitrary complete bipartite graph $B$, which asks for the maximum number of induced copies of $B$ in an $n$-vertex graph, and to the inducibility problem for $K_{2,1,1,1}$ and $K_{3,1,1}$, the only complete partite graphs on at most five vertices for which the problem was previously open.
description: 44 pages
title: Splenic Graulomatosis
Creators: name: Barbiera, Filippo
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Tissue characterisation
subject: Inflammation
subject: Infection
subject: Contrast agent-intravenous
subject: Ultrasound
subject: MR
subject: CT
subject: Spleen
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: We expose the principal imaging characteristics of splenic granulomatosis, in order to interpret the findings correctly, reaching whenever possible the appropriate...
Variables associated with transprejudice
Creators: name: Cheso, Diana
name: Bjornsdottir, R. Thora
name: Zagefka, Hanna
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This survey study will investigate variables associated with transprejudice.
The digit exchanges in the rotational beta expansions of algebraic numbers
Creators: name: Kaneko, Hajime
name: Kawashima, Makoto
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In this article, we investigate the $β$-expansions of real algebraic numbers. In particular, we give new lower bounds for the number of digit exchanges in the case where $β$ is a Pisot or Salem number. Moreover, we define a new class of algebraic numbers, quasi-Pisot numbers and quasi-Salem numbers, which gives a generalization of Pisot numbers and Salem numbers. Our method is applicable also to the digit expansions of complex algebraic numbers, which gives new estimation. In particular, we investigate the digits of rotational beta expansion by Akiyama and Caalim $[3]$ and zeta-expansion by Surer $[20]$, where the base is a quasi-Pisot or quasi-Salem number.
description: 16 pages, Version 3: accepted version
title: Brain morphology and diffusion can identify a specific individual
Creators: name: Takao, Hidemasa
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: CNS
subject: Neuroradiology brain
subject: Computer applications
subject: MR
subject: MR-Diffusion/Perfusion
subject: Computer Applications-General
subject: Image verification

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The identification of individual differences in brain structures is important to study the background of individual differences in brain function and performance. The proliferation of computer networks has enhanced the need for reliably establishing...
Association between dermatoglyphic patterns and growth patterns of subjects with skeletal class I relation : A Cross Sectional Study
Creators: name: Shashidhar, Keerthan
name: Kuttappa, M
name: Nayak, U
name: D'souza, Neevan
name: Shetty, Mahabalesh
name: Achalli, Sonika
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Dental Public Health and Education
subject: Medicine and Health Sciences
subject: Bioethics and Medical Ethics
subject: Dentistry
subject: FOS: Clinical medicine

description: Patients with Class I Skeletal relation were selected after clinical diagnosis followed by digitally tracing the cephalogram. The patients were subdivided into three groups of mandibular divergence patterns ie Average, Horizontal and Vertical. 90 samples ie 30 in each group we selected for the study. The fingerprints of all the selected subjects were then extracted digitally and analysed for the most dominant pattern in each hand.
The Nonlinear Field Space Theory
Creators: name: Mielczarek, Jakub
name: Trzesniewski, Tomasz
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In recent years the idea that not only the configuration space of particles, i.e. spacetime, but also the corresponding momentum space may have nontrivial geometry has attracted significant attention, especially in the context of quantum gravity. The aim of this letter is to extend this concept to the domain of field theories, by introducing field spaces (i.e. phase spaces of field values) that are not affine spaces. After discussing the motivation and general aspects of our approach we present a detailed analysis of the prototype (quantum) Nonlinear Field Space Theory of a scalar field on the Minkowski background. We show that the nonlinear structure of a field space leads to numerous interesting predictions, including: non-locality, generalization of the uncertainty relations, algebra deformations, constraining of the maximal occupation number, shifting of the vacuum energy and renormalization of the charge and speed of propagation of field excitations. Furthermore, a compact field space is a natural way to implement the "Principle of Finiteness" of physical theories, which once motivated the Born-Infeld theory. Thus the presented framework has a variety of potential applications in the theories of fundamental interactions (e.g. quantum gravity), as well as in condensed matter physics (e.g. continuous spin chains), and can shed new light on the issue of divergences in quantum field theories.
description: 7 pages, v2 additional content and references added, title changed, presentation improved
title: Optimization protocol of abdomen CT by using ASIR iterative method.
Creators: name: Di Nardo, Gerardo
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Technology assessment
subject: CT
subject: Abdomen
subject: Dosimetric comparison

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Our goal consisted in providing the Healthcare Physics Department with an abdomen CT protocol that could make the best use of the Adaptive Statistical Iterative Reconstruction (ASIR) method, in order to reduce the dose and preserve the image quality...
Young Children’s Subjective and Objective Thresholds of Visual Consciousness Using a Backward Masking Task and Perceptual Awareness Scale
Creators: name: Watanabe, Ryoichi
name: Moriguchi, Yusuke
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Developmental Psychology
subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: Several previous research on visual consciousness has shown that when a stimulus is presented for a sufficient time to be processed, we can perceive it consciously. Specifically, consciousness has an all-or-nothing, sigmoidal emergent process between pre-threshold and post-threshold. However, the development of visual consciousness, indexed by the threshold and the emergent processes, are still unknown. We will examine what the subjective and objective thresholds and emergent processes of visual consciousness are in young children and adults. Five-to-6-year-old children and adults will participate in this study. In our experiment, children and adults were given a visual awareness task using a square or a diamond as the target stimulus. Four conditions of stimulus onset asynchronies (SOAs) were randomly intermixed across trials (40, 80, 120, and 160 ms). We measured the accuracy rate (A square or a diamond?) and the Perceptual Awareness Scale rate (How clear did you see it?). After the non-linear models (Sandberg et al., 2011) were fitted to the accuracy and PAS rate, we compared the parameters such as the threshold and the steepness of the models in young children and adults.
title: Perfusion-CT in stroke : false ischemic penumbra.
Creators: name: Vivancos Costaleite, Karla Hypatia
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Embolism / Thrombosis
subject: Contrast agent-intravenous
subject: CT-High Resolution
subject: CT-Angiography
subject: CT
subject: Emergency
subject: Neuroradiology brain
subject: Acute
subject: Ischaemia / Infarction

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Familiarize radiologists and residents begin with image patterns and causes of false ischemic penumbra in emergency CT...
Revisiting the psychological sources of ambiguity avoidance: Replication and extensions of Curley, Yates, and Abrams (1986)
Creators: name: Feldman, Gilad
name: Yiu, Sze
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: ambiguity
subject: ambiguity avoidance
subject: bias
subject: decision making
subject: heuristics
subject: judgment
subject: replication
subject: replication and extension

description: Freezing and pre-reg PCIRR stage 1 folder following IPA from PCI-RR.
Arithmetic Chern-Simons theory with real places
Creators: name: Lee, Jungin
name: Park, Jeehoon
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R04, 11R37, 11R80, 81T45

description: The goal of this paper is two-fold: we generalize the arithmetic Chern-Simons theory over totally imaginary number fields studied in [Kim15, CKK+16] to arbitrary number fields (with real places) and provide new examples of non-trivial arithmetic Chern-Simons invariant with coefficient $\mathbb{Z}/n\mathbb{Z}$ $(n \geq 2)$ associated to a non-abelian gauge group. The main idea for the generalization is to use cohomology with compact support (see [Mil06]) to deal with real places. Before the results of this paper, non-trivial examples were limited to some non-abelian gauge group with coefficient $\mathbb{Z}/2\mathbb{Z}$ in [CKK+16] and the abelian cyclic gauge group with coefficient $\mathbb{Z}/n\mathbb{Z}$ in [BCG+18]. Our non-trivial examples (with non-abelian gauge group and general coefficient $\mathbb{Z}/n\mathbb{Z}$) will be given by a simple twisting argument based on examples of [BCG+18].
description: 21 pages, exposition improved
title: Comparision of diagnostic efficiency of DWI and contrast enhanced sequences performed with MRI in assessment of active and chronic Crohn disease- preliminary results.
Creators: name: Szymańska-Dubowik, Anna
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Inflammation
subject: Imaging sequences
subject: MR
subject: Gastrointestinal tract
subject: Colon
subject: Abdomen

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Crohn's disease is an inflammatory process of the gastrointestinal tract usually affecting the small intestine but it can attack every part of the bowel and digestive tract. Typically indentified changes affect limitated areas of the bowel, are...
Censoring Diffusion for Harvesting WSNs
Creators: name: Fernandez-Bes, Jesus
name: Arroyo-Valles, Rocío
name: Arenas-García, Jerónimo
name: Cid-Sueiro, Jesús
Publisher: name: arXiv
Year: 2015
Subjects: subject: Systems and Control (eess.SY)
subject: Multiagent Systems (cs.MA)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this paper, we analyze energy-harvesting adaptive diffusion networks for a distributed estimation problem. In order to wisely manage the available energy resources, we propose a scheme where a censoring algorithm is jointly applied over the diffusion strategy. An energy-aware variation of a diffusion algorithm is used, and a new way of measuring the relevance of the estimates in diffusion networks is proposed in order to apply a subsequent censoring mechanism. Simulation results show the potential benefit of integrating censoring schemes in energy-constrained diffusion networks.
description: Accepted in 2015 IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP 2015)
Intersection models and forbidden pattern characterizations for 2-thin and proper 2-thin graphs
Creators: name: Bonomo-Braberman, Flavia
name: Brito, Gastón Abel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.2.2
subject: 05C62, 05C75

description: The \emph{thinness} of a graph is a width parameter that generalizes some properties of interval graphs, which are exactly the graphs of thinness one. Graphs with thinness at most two include, for example, bipartite convex graphs. Many NP-complete problems can be solved in polynomial time for graphs with bounded thinness, given a suitable representation of the graph. \emph{Proper thinness} is defined analogously, generalizing proper interval graphs, and a larger family of NP-complete problems are known to be polynomially solvable for graphs with bounded proper thinness. The complexity of recognizing 2-thin and proper 2-thin graphs is still open. In this work, we present characterizations of 2-thin and proper 2-thin graphs as intersection graphs of rectangles in the plane, as vertex intersection graphs of paths on a grid (VPG graphs), and by forbidden ordered patterns. We also prove that independent 2-thin graphs are exactly the interval bigraphs, and that proper independent 2-thin graphs are exactly the bipartite permutation graphs. Finally, we take a step towards placing the thinness and its variations in the landscape of width parameters, by upper bounding the proper thinness in terms of the bandwidth.
description: An extended abstract of this work, entitled "Intersection models for 2-thin and proper 2-thin graphs", was presented at LAGOS 2021 and appears in Procedia Computer Science 195 (2021), 221-229 (Proc. LAGOS'21, Sao Paulo, Brazil)
Ionised outflows in z $\sim$ 2.4 quasar host galaxies
Creators: name: Carniani, S.
name: Marconi, A.
name: Maiolino, R.
name: Balmaverde, B.
name: Brusa, M.
name: Cano-Díaz, M.
name: Cicone, C.
name: Comastri, A.
name: Cresci, G.
name: Fiore, F.
name: Feruglio, C.
name: La Franca, F.
name: Mainieri, V.
name: Mannucci, F.
name: Nagao, T.
name: Netzer, H.
name: Piconcelli, E.
name: Risaliti, G.
name: Schneider, R.
name: Shemmer, O.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: AGN-driven outflows are invoked by galaxy evolutionary models to quench star formation and to explain the origin of the relations observed locally between super massive black holes and their host galaxies. This work aims to detect the presence of extended ionised outflows in luminous quasars where we expect the maximum activity both in star formation and in black hole accretion. Currently, there are only a few studies based on spatially resolved observations of outflows at high redshift, $z>2$. We analyse a sample of six luminous (${\rm L>10^{47} \ erg/s}$) quasars at $z\sim2.4$, observed in H-band using the near-IR integral field spectrometer SINFONI at VLT. We perform a kinematic analysis of the [OIII] emission line at $λ= 5007Å$. [OIII] has a complex gas kinematic, with blue-shifted velocities of a few hundreds of km/s and line widths up to 1500 km/s. Using the spectroastrometric method we infer size of the ionised outflows of up to $\sim$2 kpc. The properties of the ionised outflows, mass outflow rate, momentum rate and kinetic power, are correlated with the AGN luminosity. The increase in outflow rate with increasing AGN luminosity is consistent with the idea that a luminous AGN pushes away the surrounding gas through fast outflows driven by radiation pressure, which depends on the emitted luminosity. We derive mass outflow rates of about 6-700 M$_{\odot}$/yr for our sample, which are lower than those observed in molecular outflows. Indeed physical properties of ionised outflows show dependences on AGN luminosity which are similar to those of molecular outflows but indicating that the mass of ionised gas is smaller than that of the molecular one. Alternatively, this discrepancy between ionised and molecular outflows could be explained with different acceleration mechanisms.
description: 13 pages, 11 figures; accepted for publication in A&A
title: Lines and tubes - A Radiological Review
Creators: name: Ramsay, Lauren
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Education and training
subject: Venous access
subject: Education
subject: Drainage
subject: Conventional radiography
subject: Vascular
subject: Respiratory system
subject: Interventional non-vascular

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Recognisecommonly placed lines and tubes on conventional radiography (primarily chest and abdominal X-Ray), Interpret and evaluate placement and position, Learn about common mistakes and pitfalls when interpreting tube placement, Recognise less...
$L_2$-small ball asymptotics for a family of finite-dimensional perturbations of Gaussian functions
Creators: name: Petrova, Yulia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this article we study the small ball probabilities in $L_2$-norm for a family of finite-dimensional perturbations of Gaussian functions. We define three types of perturbations: non-critical, partially critical and critical; and derive small ball asymptotics for the perturbated process in terms of the small ball asymptotics for the original process. The natural examples of such perturbations appear in statistics in the study of empirical processes with estimated parameters (the so-called Durbin's processes). We show that the Durbin's processes are critical perturbations of the Brownian bridge. Under some additional assumptions, general results can be simplified. As an example we find the exact $L_2$-small ball asymptotics for critical perturbations of the Green processes (the processes which covariance function is the Green function of the ordinary differential operator).
The monotonicity of the apsidal angle in power-law potential systems
Creators: name: Castelli, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 70F05, 65G30

description: In a central force system the apsidal angle is the angle at the centre of force between two consecutive apsis and measures the precession rate of the line of apsis. The apsidal angle has applications in different fields and the Newton's apsidal precession theorem has been extensively studied by astronomers, physicist and mathematicians. The perihelion precession of Mercury, the dynamics of galaxies, the vortex dynamics, the JWKB quantisation condition are some examples where the apsidal angle is of interest. In case of eccentric orbits and forces far from inverse square, numerical investigations provide evidence of the monotonicity of the apsidal angle with respect to the orbit parameters, such as the orbit eccentricity. However, no proof of this statement is available. In this paper central force systems with $f(r)\sim μr^{-(α+1)}$ are considered. We prove that for any $-2
description: 34 pages, 1 figure
title: Role of MR in the evaluation of cystic-appearing soft tissue masses
Creators: name: Garatea Aznar, Pedro
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Tissue characterisation
subject: Neoplasia
subject: Cysts
subject: Diagnostic procedure
subject: Contrast agent-intravenous
subject: MR
subject: Musculoskeletal system
subject: Musculoskeletal soft tissue

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Distinguish between truly cystic and cystic-appearing solid soft tissuelesions. Discuss the lesions that may have a cystic appearance at MR imaging. Describe thecharacteristic imaging features of the aforementioned...
A Framework for Population-Based Stochastic Optimization on Abstract Riemannian Manifolds
Creators: name: Fong, Robert Simon
name: Tino, Peter
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We present Extended Riemannian Stochastic Derivative-Free Optimization (Extended RSDFO), a novel population-based stochastic optimization algorithm on Riemannian manifolds that addresses the locality and implicit assumptions of manifold optimization in the literature. We begin by investigating the Information Geometrical structure of statistical model over Riemannian manifolds. This establishes a geometrical framework of Extended RSDFO using both the statistical geometry of the decision space and the Riemannian geometry of the search space. We construct locally inherited probability distribution via an orientation-preserving diffeomorphic bundle morphism, and then extend the information geometrical structure to mixture densities over totally bounded subsets of manifolds. The former relates the information geometry of the decision space and the local point estimations on the search space manifold. The latter overcomes the locality of parametric probability distributions on Riemannian manifolds. We then construct Extended RSDFO and study its structure and properties from a geometrical perspective. We show that Extended RSDFO's expected fitness improves monotonically and it's global eventual convergence in finitely many steps on connected compact Riemannian manifolds. Extended RSDFO is compared to state-of-the-art manifold optimization algorithms on multi-modal optimization problems over a variety of manifolds. In particular, we perform a novel synthetic experiment on Jacob's ladder to motivate and necessitate manifold optimization. Jacob's ladder is a non-compact manifold of countably infinite genus, which cannot be expressed as polynomial constraints and does not have a global representation in an ambient Euclidean space. Optimization problems on Jacob's ladder thus cannot be addressed by traditional (constraint) optimization methods on Euclidean spaces.
description: The present abstract is slightly altered from the PDF version due to the limitation "The abstract field cannot be longer than 1,920 characters"
Sampling by Divergence Minimization
Creators: name: Dharamshi, Ameer
name: Ngo, Vivian
name: Rosenthal, Jeffrey S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: We introduce a Markov Chain Monte Carlo (MCMC) method that is designed to sample from target distributions with irregular geometry using an adaptive scheme. In cases where targets exhibit non-Gaussian behaviour, we propose that adaption should be regional rather than global. Our algorithm minimizes the information projection component of the Kullback-Leibler (KL) divergence between the proposal and target distributions to encourage proposals that are distributed similarly to the regional geometry of the target. Unlike traditional adaptive MCMC, this procedure rapidly adapts to the geometry of the target's current position as it explores the surrounding space without the need for many preexisting samples. The divergence minimization algorithms are tested on target distributions with irregularly shaped modes and we provide results demonstrating the effectiveness of our methods.
description: 33 pages, 12 figures
Hodge Theory for Polymatroids
Creators: name: Pagaria, Roberto
name: Pezzoli, Gian Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B35, 14N20, 52C35

description: We construct a Leray model for a discrete polymatroid with arbitrary building set and we prove a generalized Goresky-MacPherson formula. The first row of the model is the Chow ring of the polymatroid; we prove Poincaré duality, Hard Lefschetz, and Hodge-Riemann theorems for the Chow ring. Furthermore we provide a relative Lefschetz decomposition with respect to the deletion of an element.
description: 41 pages, 4 figure. Comments are welcome
Approaches to including environmental impacts in health technology assessments, guidelines, and health economic analyses: a systematic scoping review
Creators: name: Yoo, Seo-Hyun
name: Pinho-Gomes, Ana-Catarina
name: Maiden, Hannah
name: Toolan, Michael
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Environmental Health Life Sciences
subject: Physical Sciences and Mathematics
subject: Environmental Indicators and Impact Assessment
subject: Pharmacology, Toxicology and Environmental Health
subject: Public Health
subject: Medicine and Health Sciences
subject: Life Sciences
subject: Environmental Sciences
subject: Health and Medical Administration

description: A systematic scoping review of approaches to including consideration of environmental impacts in health technology appraisals, guidelines development processes and health economic evaluations.
Delayed or Forgone Care During the COVID-19 Pandemic
Creators: name: Barnard, Marie
name: Korgaonkar, Siddhi
name: Prajapati, Prachi
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Public Health
subject: Medicine and Health Sciences
subject: Health and Medical Administration
subject: Health Services Research
subject: COVID-19
subject: Healthcare utilization

description: Scoping review protocol for review to understand the patterns of healthcare services utilization with a focus on care delays and/or avoidance among adults in the United States (US) during the COVID-19 pandemic.
Hyperelliptic graphs and metrized complexes
Creators: name: Len, Yoav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We prove a version of Clifford's theorem for metrized complexes. Namely, a metrized complex that carries a divisor of degree $2r$ and rank $r$ (for $0
description: Fixed a gap in Proposition 3.3
title: Temporal bone multidetector computed tomography in the diagnosis of traumatic facial nerve injuries
Creators: name: Baraibar Argota, Nerea
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Anatomy
subject: Trauma
subject: Head and neck
subject: CT-High Resolution
subject: Computer Applications-Detection, diagnosis
subject: Trauma

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review temporal bone fracture classification and its practical implications in the management of these patients. To illustrate through imaging techniques the complex facial nerve anatomy. To discuss the role of multidetector computed tomography...
A Gromov-Witten theory for simple normal-crossing pairs without log geometry
Creators: name: Tseng, Hsian-Hua
name: You, Fenglong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We define a new Gromov-Witten theory relative to simple normal crossing divisors as a limit of Gromov-Witten theory of multi-root stacks. Several structural properties are proved including relative quantum cohomology, Givental formalism, Virasoro constraints (genus zero) and a partial cohomological field theory. Furthermore, we use the degree zero part of the relative quantum cohomology to provide an alternative mirror construction of Gross-Siebert and to prove the Frobenius structure conjecture of Gross-Hacking-Keel.
description: 34 pages. Comments are welcome! v2: final version to appear in CMP
Feature-Based Interpretable Reinforcement Learning based on State-Transition Models
Creators: name: Davoodi, Omid
name: Komeili, Majid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Growing concerns regarding the operational usage of AI models in the real-world has caused a surge of interest in explaining AI models' decisions to humans. Reinforcement Learning is not an exception in this regard. In this work, we propose a method for offering local explanations on risk in reinforcement learning. Our method only requires a log of previous interactions between the agent and the environment to create a state-transition model. It is designed to work on RL environments with either continuous or discrete state and action spaces. After creating the model, actions of any agent can be explained in terms of the features most influential in increasing or decreasing risk or any other desirable objective function in the locality of the agent. Through experiments, we demonstrate the effectiveness of the proposed method in providing such explanations.
Generalized SU(2) Proca theory reconstructed and beyond
Creators: name: Cadavid, Alexander Gallego
name: Rodriguez, Yeinzon
name: Gomez, L. Gabriel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: As a modified gravity theory that introduces new gravitational degrees of freedom, the generalized SU(2) Proca theory (GSU2P for short) is the non-Abelian version of the well-known generalized Proca theory where the action is invariant under global transformations of the SU(2) group. This theory was formulated for the first time in Phys. Rev. D 94 (2016) 084041, having implemented the required primary constraint-enforcing relation to make the Lagrangian degenerate and remove one degree of freedom from the vector field in accordance with the irreducible representations of the Poincaré group. It was later shown in Phys. Rev. D 101 (2020) 045008, ibid 045009, that a secondary constraint-enforcing relation, which trivializes for the generalized Proca theory but not for the SU(2) version, was needed to close the constraint algebra. It is the purpose of this paper to implement this secondary constraint-enforcing relation in GSU2P and to make the construction of the theory more transparent. Since several terms in the Lagrangian were dismissed in Phys. Rev. D 94 (2016) 084041 via their equivalence to other terms through total derivatives, not all of the latter satisfying the secondary constraint-enforcing relation, the work was not so simple as directly applying this relation to the resultant Lagrangian pieces of the old theory. Thus, we were motivated to reconstruct the theory from scratch. In the process, we found the beyond GSU2P.
description: LaTeX file in RevTeX 4.1 style, 22 pages, no figures. v2: minor changes, including the small change in the title, in order to make the discussion clearer and more accurate. The appendix, having become inconclusive after we recognized that Eq. A19 is not as general as was originally thought, has been removed. Version to be published in Physical Review D
title: Clinical presentation, diagnosis and endovascular treatment of carotid-cavernous fistulas (CCFs): A single-centre experience
Creators: name: Magers, Sergejs
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Fistula
subject: Embolisation
subject: Catheter arteriography
subject: Interventional vascular

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: A carotid-cavernous fistula (CCF) is a type of arteriovenous fistula, in which a pathologic communication exists between the carotid artery or its branches and the cavernous sinus. Such fistulas form spontaneously or due to secondary causes...
title: Stenting renal transplant artery U-bends. A single centre experience.
Creators: name: Alsafi, Ali
Publisher: name: European Congress of Radiology
Year: 2015
Subjects: subject: Transplantation
subject: Stents
subject: Angioplasty
subject: Catheter arteriography
subject: Vascular
subject: Kidney
subject: Arteries / Aorta

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Renal transplantation is considered to be the optimal treatment for dialysis dependent end stage renal failure in patients considered fit enough to undergo the surgery. Transplant renal artery stenosis (TRAS) is an important late complication that...
Anisotropic micro-cloths fabricated from DNA-stabilized carbon nanotubes: one-stop manufacturing with electrode needles
Creators: name: Frusawa, Hiroshi
name: Yoshii, Gen
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Among a variety of solution-based approaches to fabricate anisotropic films of aligned carbon nanotubes (CNTs), we focus on the dielectrophoretic assembly method using AC electric fields in DNA-stabilized CNT suspensions. We demonstrate that a one-stop manufacturing system using electrode needles can draw anisotropic DNA-CNT hybrid films of 10-100 $μ$m in size (i.e., free-standing DNA-CNT micro-cloths) from the remaining suspension into the atmosphere while maintaining structural order. It has been found that a maximal degree of polarization (ca. 40 \%) can be achieved by micro-cloths fabricated from a variety of DNA-CNT mixtures. Our results suggest that the one-stop method can impart biocompatibility to the downsized CNT films and that the DNA-stabilized CNT micro-cloths directly connected to an electrode could be useful for biofuel cells in terms of electron transfer and/or enzymatic activity.
description: For supplementary movies, see http://www.nanoscalereslett.com/content/10/1/107/additional
Duisburg Birth Cohort Study
Creators: name: Mattonet, Katharina
name: Nowack-Weyers, Nikola
name: Kumsta, Robert
name: Vogel, Vanessa
name: Schölmerich, Axel
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: adolescence
subject: autism
subject: cognitive skills
subject: development
subject: dioxins
subject: DNA methylation
subject: EDCs
subject: empathy
subject: epigenetics
subject: estrogen
subject: hormones
subject: longitudinal
subject: PCB
subject: PCDD/F
subject: puberty
subject: sex differences
subject: social skills
subject: systemizing
subject: testosterone

description: Developmental consequences of prenatal exposure to endocrine disruptor chemicals - An investigation of epigenetic mechanisms in the Duisburg Birth Cohort Study
Precision multi-band photometry with a DSLR camera
Creators: name: Zhang, M.
name: Bakos, G. Á.
name: Penev, K.
name: Csubry, Z.
name: Hartman, J. D.
name: Bhatti, W.
name: de Val-Borro, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Ground-based exoplanet surveys such as SuperWASP, HATNet and KELT have discovered close to two hundred transiting extrasolar planets in the past several years. The strategy of these surveys is to look at a large field of view and measure the brightnesses of its bright stars to around half a percent per point precision, which is adequate for detecting hot Jupiters. Typically, these surveys use CCD detectors to achieve high precision photometry. These CCDs, however, are expensive relative to other consumer-grade optical imaging devices, such as digital single-lens reflex cameras (DSLRs). We look at the possibility of using a digital single-lens reflex camera for precision photometry. Specifically, we used a Canon EOS 60D camera that records light in 3 colors simultaneously. The DSLR was integrated into the HATNet survey and collected observations for a month, after which photometry was extracted for 6600 stars in a selected stellar field. We found that the DSLR achieves a best-case median absolute deviation (MAD) of 4.6 mmag per 180 s exposure when the DSLR color channels are combined, and 1000 stars are measured to better than 10 mmag (1%). Also, we achieve 10\,mmag or better photometry in the individual colors. This is good enough to detect transiting hot Jupiters. We performed a candidate search on all stars and found four candidates, one of which is KELT-3b, the only known transiting hot Jupiter in our selected field. We conclude that the Canon 60D is a cheap, lightweight device capable of useful photometry in multiple colors.
description: 15 pages, 15 figures, submitted to PASP
Bayesian hierarchical nonlinear modelling of intra-abdominal volume during pneumoperitoneum for laparoscopic surgery
Creators: name: Calvo, Gabriel
name: Armero, Carmen
name: Gómez-Rubio, Virgilio
name: Mazzinari, Guido
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 62P10, 62F25

description: Laparoscopy is an operation carried out in the abdomen or pelvis through small incisions with external visual control by a camera. This technique needs the abdomen to be insufflated with carbon dioxide to obtain a working space for surgical instruments' manipulation. Identifying the critical point at which insufflation should be limited is crucial to maximizing surgical working space and minimizing injurious effects. Bayesian nonlinear growth mixed-effects models are applied to data coming from a repeated measures design. This study allows to assess the relationship between the insufflation pressure and the intra--abdominal volume.