cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Räumliche Inventurverfahren zur Bestimmung des Naturverjüngungserfolgs - Modellstudie zum Kiefernsamenbaumverfahren
Creators: name: Huth, Franka
name: Wehnert, Alexandra
name: Vogt, Juliane
name: Ullrich, Jörg
Publisher: name: Technische UNiversität Dresden
Year: 2017

description: Grundlegendes Ziel des Projektes ist die Ermittlung ganzflächiger räumlicher Informationen zur Naturverjüngung in Kiefernbeständen, die im Samenbaumverfahren behandelt wurden. Das Samenbaumverfahren stellt hierbei ein waldbauliches Modellsystem dar, das sowohl den Einsatz bildgesteuerter Erfassungsmethoden zulässt (Oktokopter) als auch methodische Ansätze verfolgt, die eine Prüfung möglicher Inventurverfahren zulassen (terrestrische Stichprobenverfahren).
Hypothesis Testing for Progressive Kernel Estimation and VCM Framework
Creators: name: Lin, Zehui
name: Hu, Chenxiao
name: Jia, Jinzhu
name: Li, Sheng
Publisher: name: arXiv
Year: 2025
Subjects: subject: Graphics (cs.GR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Identifying an appropriate radius for unbiased kernel estimation is crucial for the efficiency of radiance estimation. However, determining both the radius and unbiasedness still faces big challenges. In this paper, we first propose a statistical model of photon samples and associated contributions for progressive kernel estimation, under which the kernel estimation is unbiased if the null hypothesis of this statistical model stands. Then, we present a method to decide whether to reject the null hypothesis about the statistical population (i.e., photon samples) by the F-test in the Analysis of Variance. Hereby, we implement a progressive photon mapping (PPM) algorithm, wherein the kernel radius is determined by this hypothesis test for unbiased radiance estimation. Secondly, we propose VCM+, a reinforcement of Vertex Connection and Merging (VCM), and derive its theoretically unbiased formulation. VCM+ combines hypothesis testing-based PPM with bidirectional path tracing (BDPT) via multiple importance sampling (MIS), wherein our kernel radius can leverage the contributions from PPM and BDPT. We test our new algorithms, improved PPM and VCM+, on diverse scenarios with different lighting settings. The experimental results demonstrate that our method can alleviate light leaks and visual blur artifacts of prior radiance estimate algorithms. We also evaluate the asymptotic performance of our approach and observe an overall improvement over the baseline in all testing scenarios.
description: This paper has been published in IEEE Transactions on Visualization and Computer Graphics. This version is a preprint one
The VIPERS Multi-Lambda Survey. II. Diving with massive galaxies in 22 square degrees since z = 1.5
Creators: name: Moutard, T.
name: Arnouts, S.
name: Ilbert, O.
name: Coupon, J.
name: Davidzon, I.
name: Guzzo, L.
name: Hudelot, P.
name: McCracken, H. J.
name: Van Waerbeke, L.
name: Morrison, G. E.
name: Fèvre, O. Le
name: Comte, V.
name: Bolzonella, M.
name: Fritz, A.
name: Garilli, B.
name: Scodeggio, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the evolution of the galaxy stellar mass function (SMF) and stellar mass density from redshift z=0.2 to z=1.5 of a $K_{AB}$<22-selected sample with highly reliable photometric redshifts and over an unprecedentedly large area. Our study is based on NIR observations carried out with WIRCam at CFHT over the footprint of the VIPERS spectroscopic survey and benefits from the high quality optical photometry from the CFHTLS and UV observations with the GALEX satellite. The accuracy of our photometric redshifts is $σ_z$ < 0.03 and 0.05 for the bright ($i_{AB}$<22.5) and faint ($i_{AB}$>22.5) samples, respectively. The SMF is measured with ~760,000 galaxies down to $K_s$=22 and over an effective area of ~22.4 deg$^2$, the latter of which drastically reduces the statistical uncertainties (i.e. Poissonian error & cosmic variance). We point out the importance of a careful control of the photometric calibration, whose impact becomes quickly dominant when statistical uncertainties are reduced, which will be a major issue for future generation of cosmological surveys with, e.g. EUCLID or LSST. By exploring the rest-frame (NUV-r) vs (r-$K_s$) color-color diagram separating star-forming and quiescent galaxies, (1) we find that the density of very massive log($M_*/ M_{\odot}$) > 11.5 galaxies is largely dominated by quiescent galaxies and increases by a factor 2 from z~1 to z~0.2, which allows for additional mass assembly via dry mergers, (2) we confirm a scenario where star formation activity is impeded above a stellar mass log($M^*_{SF} / M_{\odot}$) = 10.64$\pm$0.01, a value that is found to be very stable at 0.2 < z < 1.5, (3) we discuss the existence of a main quenching channel that is followed by massive star-forming galaxies, and finally (4) we characterise another quenching mechanism required to explain the clear excess of low-mass quiescent galaxies observed at low redshift.
description: 22 pages, 20 figures. Accepted for publication in A&A. Version to be published
MARVEL - D3.1: Multimodal and privacy-aware audio-visual intelligence – initial version
Creators: name: Iosifidis, Alexandros
Publisher: name: Zenodo
Year: 2022
Subjects: E2F2C
AI
multimodal
supervised
unsupervised
cross-modal
smart cities

description: This document describes the initial version of the methodologies pro- posed by MARVEL partners towards the realisation of the Audio, Visual and Multimodal AI Subsystem of the MARVEL architecture. These include methods for Sound Event De- tection, Sound Event Localisation and Detection, Automated Audio Captioning, Visual Anomaly Detection, Visual Crowd Counting, Audio-Visual Crowd Counting, as well as methodologies for improving the training and efficiency of AI models under supervised, unsupervised, and cross-modal contrastive learning settings. The effectiveness of these methods is compared against recent baselines, towards achieving the AI methodology- related objectives of the MARVEL project.
Time Symmetric Quantum Mechanics and Causal Classical Physics
Creators: name: Bopp, Fritz W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: A two boundary quantum mechanics without time ordered causal structure is advocated as consistent theory. The apparent causal structure of usual "near future" macroscopic phenomena is attributed to a cosmological asymmetry and to rules governing the transition between microscopic to macroscopic observations. Our interest is a heuristic understanding of the resulting macroscopic physics.
description: 15 pages, 2 figures, important reference added
Towards a unified explanation of $R_{D^{(\ast)}}$, $R_{K}$ and $(g-2)_μ$ anomalies in a left-right model with leptoquarks
Creators: name: Das, Diganta
name: Hati, Chandan
name: Kumar, Girish
name: Mahajan, Namit
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a unified explanation for the $B$-decay anomalies in $R_{D^{(\ast)}}$ and $R_{K}$ together with the anomalous muon magnetic moment, consistent with the constraints from the current measurements of leptonic decay rates and $D^0-\bar{D}^0$, $B_{s}^0-\bar{B}_{s}^0$ mixings, within the framework of a minimal left-right symmetric gauge theory motivated by one of the low-energy subgroups of $E_{6}$ naturally accommodating leptoquarks.
description: 6 pages, 2 figures, revised section IV, main results and conclusions unchanged, references added, matches published version
Josua und das Deuteronomistische Geschichtswerk: Zur Bedeutung von Hendrik J. Koorevaar, De Opbouw van het Boek Jozua
Creators: name: Klement, Herbert
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1650137397
description: Jahrbuch für evangelikale Theologie, V. 5 (1991): Jahrbuch für evangelikale Theologie, Band 5
Gender Balance on State Boards in Ireland: To the Forefront of Progress or Concealing the Status Quo?
Creators: name: BERKERY, ELAINE
name: Murphy, Caroline
name: CROSS, CHRISTINE
Publisher: name: University of Limerick
Year: 2023
Subjects: Commerce, management, tourism and services

description: In this article, we examine female appointments to government-owned corporations, called State Sponsored Boards (SSBs), in Ireland over a twenty-eight-year period, to analyze the extent to which gender parity has been achieved using voluntary gender targets. Using data from thirty-four SSBs, we found that overall figures relating to the achievement of gender parity on SSBs are masking the reality of female representation on these boards. We have demonstrated that the high concentration of females on particular boards is increasing the overall average gender representation figures, and as a result, a high proportion of boards are not meeting their gender targets. This research provides evidence of the importance of taking a more nuanced approach to examining gender diversity on boards as a whole
Die Einheitlichkeit der Sintfluterzählung: Ein Beitrag zur neueren Diskussion über die Urkundenhypothese
Creators: name: Wacker, Michael
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1650137389
description: Jahrbuch für evangelikale Theologie, V. 5 (1991): Jahrbuch für evangelikale Theologie, Band 5
Superradiance in a Large and Dilute Cloud of Cold Atoms in the Linear-Optics Regime
Creators: name: Araújo, Michelle O.
name: Kresic, Ivor
name: Kaiser, Robin
name: Guerin, William
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Superradiance has been extensively studied in the 1970s and 1980s in the regime of superfluores-cence, where a large number of atoms are initially excited. Cooperative scattering in the linear-optics regime, or "single-photon superradiance" , has been investigated much more recently, and superra-diant decay has also been predicted, even for a spherical sample of large extent and low density, where the distance between atoms is much larger than the wavelength. Here, we demonstrate this effect experimentally by directly measuring the decay rate of the off-axis fluorescence of a large and dilute cloud of cold rubidium atoms after the sudden switch-off of a low-intensity laser driving the atomic transition. We show that, at large detuning, the decay rate increases with the on-resonance optical depth. In contrast to forward scattering, the superradiant decay of off-axis fluorescence is suppressed near resonance due to attenuation and multiple-scattering effects.
PPN parameters in gravitational theory with nonminimally derivative coupling
Creators: name: Yi, Zhu
name: Gong, Yungui
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The nonminimal coupling of the kinetic term to Einstein's tensor helps the implementation of inflationary models due to the gravitationally enhanced friction. We calculate the parametrized post-Newtonian (PPN) parameters for the scalar--tensor theory of gravity with nonminimally derivative coupling. We find that under experimental constraint from the orbits of millisecond pulsars in our galaxy, the theory deviates from Einstein's general relativity in the order of $10^{-20}$, and the effect of the nonminimal coupling is negligible if we take the scalar field as dynamical dark energy. With the assumed conditions that the background scalar field is spatially homogeneous and evolves only on cosmological timescales and the contribution to stress--energy in the solar system from the background scalar field is subdominant, the scalar field is required to be massless.
description: minor corrections, 1 table added, Int. J. Mod. Phys. D in press
Wald Confidence Intervals for the Parameter in a Bernoulli Component of Zero-Inflated Poisson and Zero-Altered Poisson Models with Different Link Functions
Creators: name: Patchanok Srisuradetchai
Publisher: name: กองบริหารการวิจัย
Year: 2020
Subjects: Count data
Hurdle model
Link functions
Wald Confidence Interval

description: Science & Technology Asia, 25, 2, 1-14
Generalized guidance equation for peaked quantum solitons and effective gravity
Creators: name: Durt, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bouncing oil droplets have been shown to follow de Broglie-Bohm like trajectories and at the same time they exhibit attractive and repulsive pseudo-gravitation. We propose a model aimed at rendering account of these phenomenological observations. It inspires, in a more speculative approach, a toy model for quantum gravity.
On Causality in Dynamical Systems
Creators: name: Harnack, Daniel
name: Laminski, Erik
name: Pawelzik, Klaus Richard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Discovery of causal relations is fundamental for understanding the dynamics of complex systems. While causal interactions are well defined for acyclic systems that can be separated into causally effective subsystems, a mathematical definition of gradual causal interaction is still lacking for nonseparable dynamical systems. The solution proposed here is analytically tractable for time discrete chaotic maps and is shown to fulfill basic requirements for causality measures. It implies a method for determination of directed effective influences using pairs of measurements from dynamical systems. Applications to time series from systems of coupled differential equations and linear stochastic systems demonstrate its general utility.
description: 7 pages, 6 figures, original manuscript
title: The investigation of the correlation between spermiogram parameters and intraparenchymal testicular spectral doppler indices in patients with clinical varicocele
Creators: name: Semiz, Ismail
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Ultrasound-Colour Doppler
subject: Genital / Reproductive system male
subject: Diagnostic procedure
subject: Varices

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Varicocele is one of the most frequent causes of infertility among men referring to infertility clinics. Clinically, varicocele can be classified into three grades. In grade 3, the presence of dilated varicose veins can be seen by observation...
title: Gastric traumatic injuries: MDCT findings.
Creators: name: Gaha, Mehdi
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Trauma
subject: Diagnostic procedure
subject: CT
subject: Gastrointestinal tract
subject: Emergency
subject: Abdomen

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Traumatic injuries are a leading cause of death during the first four decades of life with a substantial rate of permanent disability, accounting for a major social and economic problem. Gastric traumatic injuries and their radiological appearance...
title: Changes in renal doppler ultrasonographic parameters in patients managed with rigid ureteroscopy
Creators: name: Tokgoz, Husnu
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Abdomen
subject: Urinary Tract / Bladder
subject: Ultrasound-Colour Doppler
subject: Surgery
subject: Obstruction / Occlusion

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Our primary aim in this prospective clinical study was to determine preoperative and postoperative intrarenal vascular parameters such as resistive index (RI), pulsatility index (PI), peak systolic velocity (PSV), end-diastolik velocity (EDV);...
title: Color Doppler evaluation of the retrobulbar hemodynamic changes in chronic obstructive pulmonary disease (COPD) patients
Creators: name: Tokgoz, Ozlem
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Chronic obstructive airways disease
subject: Diagnostic procedure
subject: Ultrasound-Colour Doppler
subject: Ultrasound physics
subject: Thorax
subject: Lung

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Chronic obstructive pulmonary disease (COPD) is defined by chronic inflammation throughout the airways, parenchyma, andpulmonary vasculature [1]. In our prospective clinical trial, we aimed to evaluate the hemodynamic changes in the extraocular...
Sci-GaIA Deliverable D2.4 - Energising Scientific Endeavour: Experiences of Supporting Communities of Practice with Science Gateways and e-Infrastructures
Creators: name: Tenhunen, Hannu
Publisher: name: Sci-GaIA Open Access Repository
Year: 2017

description: This deliverable presents the status of the activities of WP2 (Support new and already emerging communities of practice), Tasks 2.2, 2.3 and 2.4
Factor Models for Cancer Signatures
Creators: name: Kakushadze, Zura
name: Yu, Willie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Genomics (q-bio.GN)
subject: Quantitative Methods (q-bio.QM)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Biological sciences
subject: FOS: Economics and business

description: We present a novel method for extracting cancer signatures by applying statistical risk models (http://ssrn.com/abstract=2732453) from quantitative finance to cancer genome data. Using 1389 whole genome sequenced samples from 14 cancers, we identify an "overall" mode of somatic mutational noise. We give a prescription for factoring out this noise and source code for fixing the number of signatures. We apply nonnegative matrix factorization (NMF) to genome data aggregated by cancer subtype and filtered using our method. The resultant signatures have substantially lower variability than those from unfiltered data. Also, the computational cost of signature extraction is cut by about a factor of 10. We find 3 novel cancer signatures, including a liver cancer dominant signature (96% contribution) and a renal cell carcinoma signature (70% contribution). Our method accelerates finding new cancer signatures and improves their overall stability. Reciprocally, the methods for extracting cancer signatures could have interesting applications in quantitative finance.
description: 70 pages, 21 figures; a few trivial typos corrected
title: Aberrations of the cervical internal carotid artery which may be dangerous in pharyngeal surgery are more common than previously reported- a computed tomographic study
Creators: name: Gossner, Johannes
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Safety
subject: CT
subject: Head and neck
subject: Ear / Nose / Throat
subject: Haemorrhage

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Variations in the anatomical course of the cervical portion of the internal carotid artery (ICA) are incidental findings in most cases lacking clinical relevance. However, an aberrant ICA showing contact to the pharyngeal wall could easily be...
Thermal transport in crystals as a kinetic theory of relaxons
Creators: name: Cepellotti, Andrea
name: Marzari, Nicola
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal conductivity in dielectric crystals is the result of the relaxation of lattice vibrations described by the phonon Boltzmann transport equation. Remarkably, an exact microscopic definition of the heat carriers and their relaxation times is still missing: phonons, typically regarded as the relevant excitations for thermal transport, cannot be identified as the heat carriers when most scattering events conserve momentum and do not dissipate heat flux. This is the case for two-dimensional or layered materials at room temperature, or three-dimensional crystals at cryogenic temperatures. In this work we show that the eigenvectors of the scattering matrix in the Boltzmann equation define collective phonon excitations, termed here relaxons. These excitations have well defined relaxation times, directly related to heat flux dissipation, and provide an exact description of thermal transport as a kinetic theory of the relaxon gas. We show why Matthiessen's rule is violated, and construct a procedure for obtaining the mean free paths and relaxation times of the relaxons. These considerations are general, and would apply also to other semiclassical transport models, such as the electronic Boltzmann equation. For heat transport, they remain relevant even in conventional crystals like silicon, but are of the utmost importance in the case of two-dimensional materials, where they can revise by several orders of magnitude the relevant time- and length-scales for thermal transport in the hydrodynamic regime.
Joint Learning Content and Degradation Aware Feature for Blind Super-Resolution
Creators: name: Zhou, Yifeng
name: Lin, Chuming
name: Luo, Donghao
name: Liu, Yong
name: Tai, Ying
name: Wang, Chengjie
name: Chen, Mingang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: To achieve promising results on blind image super-resolution (SR), some attempts leveraged the low resolution (LR) images to predict the kernel and improve the SR performance. However, these Supervised Kernel Prediction (SKP) methods are impractical due to the unavailable real-world blur kernels. Although some Unsupervised Degradation Prediction (UDP) methods are proposed to bypass this problem, the \textit{inconsistency} between degradation embedding and SR feature is still challenging. By exploring the correlations between degradation embedding and SR feature, we observe that jointly learning the content and degradation aware feature is optimal. Based on this observation, a Content and Degradation aware SR Network dubbed CDSR is proposed. Specifically, CDSR contains three newly-established modules: (1) a Lightweight Patch-based Encoder (LPE) is applied to jointly extract content and degradation features; (2) a Domain Query Attention based module (DQA) is employed to adaptively reduce the inconsistency; (3) a Codebook-based Space Compress module (CSC) that can suppress the redundant information. Extensive experiments on several benchmarks demonstrate that the proposed CDSR outperforms the existing UDP models and achieves competitive performance on PSNR and SSIM even compared with the state-of-the-art SKP methods.
Remarks on mathematical structure of the Staruszkiewicz theory
Creators: name: Herdegen, Andrzej
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The purpose of this note is threefold: (i) to recall (with some points made more explicit) the mathematical Weyl algebra model formulation, given before, of the Staruszkiewicz theory of quantum Coulomb field; (ii) to add some new elements to the discussion of the representation of the Lorentz group within this model; (iii) to comment on some statements on the structure of the theory which appeared recently.
description: 19 pages, content identical with the published version (except for the order of references)
title: 256-slice CT angiographic evaluation of coronary artery bypass grafts: qualitative and quantitative assessment of image quality and consistency
Creators: name: Gramer, Bettina
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Cardiac
subject: Cardiovascular system
subject: CT-Angiography
subject: Venous access
subject: Contrast agent-intravenous
subject: Artifacts
subject: Haemodynamics / Flow dynamics
subject: Arteriosclerosis

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: To assess subjective and objective image quality and consistency of coronary artery bypass graft (CABG) imaging with prospectively ECG-gated large coverage 256-slice CT angiography...
Time Series Optimization-Based Characteristic Curve Calculation for Local Reactive Power Control Using Pandapower-PowerModels Interface
Creators: name: Liu, Zheng
name: Majidi, Maryam
name: Wang, Hanoan
name: Mende, Denis
name: Braun, Martin
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: characteristic curve
subject: optimal power flow
subject: distribution grids
subject: voltage stability
subject: reactive power flexibility
subject: 333
subject: 600
subject: Blindleistung
subject: Blindleistungsregelung
subject: Spannungsstabilisierung
subject: Verteilungsnetz
subject: Flexibilität

description: Gefördert durch den Publikationsfonds der Universität Kassel
title: A new radiation dose minimization approach to monitor early chemotherapy response in lymphoma with 18F-FDG PET-CT
Creators: name: Sonoda, Luke
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Oncology
subject: PET-CT
subject: Radiation safety
subject: Cancer

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: There is ever-increasing evidence of 18 F-FDG-PET-CT being useful in monitoring early response to chemotherapy in lymphoma. With a concern of radiation burden this study aimed to assess if PET-CT acquisition area could be minimised in order to...
Minimal Extension of Einstein's Theory: The Quartic Gravity
Creators: name: Karasu, Atalay
name: Kenar, Esin
name: Tekin, Bayram
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: We study structure of solutions of the recently constructed minimal extensions of Einstein's gravity in four dimensions at the quartic curvature level. The extended higher derivative theory, just like Einstein's gravity, has only a massless spin-two graviton about its unique maximally symmetric vacuum. The extended theory does not admit the Schwarzschild or Kerr metrics as exact solutions, hence there is no issue of Schwarzschild type singularity but, approximately, outside a source, spherically symmetric metric with the correct Newtonian limit is recovered. We also show that for all Einstein space-times, square of the Riemann tensor (the Kretschmann scalar or the Gauss-Bonnet invariant) obeys a non-linear scalar Klein-Gordon equation.
description: 12 pages, 2 figures, typos corrected, version to appear in PRD
Gender-dependent Contribution, Code and Creativity in a Virtual Programming Course
Creators: name: Graßl, Isabella
name: Fraser, Gordon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.5; K.3.2
subject: 97P50

description: Since computer science is still mainly male dominated, academia, industry and education jointly seek ways to motivate and inspire girls, for example by introducing them to programming at an early age. The recent COVID-19 pandemic has forced many such endeavours to move to an online setting. While the gender-dependent differences in programming courses have been studied previously, for example revealing that girls may feel safer in same-sex groups, much less is known about gender-specific differences in online programming courses. In order to investigate whether gender-specific differences can be observed in online courses, we conducted an online introductory programming course for Scratch, in which we observed the gender-specific characteristics of participants with respect to how they interact, their enjoyment, the code they produce, and the creativity exposed by their programs. Overall, we observed no significant differences between how girls participated in all-female vs. mixed groups, and girls generally engaged with the course more actively than boys. This suggests that online courses can be a useful means to avoid gender-dependent group dynamics. However, when encouraging creative freedom in programming, girls and boys seem to fall back to socially inherited stereotypical behavior also in an online setting, influencing the choice of programming concepts applied. This may inhibit learning and is a challenge that needs to be addressed independently of whether courses are held online.
description: To be published in the Proceedings of the 17th Workshop in Primary and Secondary Computing Education (WIPSCE'22)
title: The ratio of descending aortic enhancement to main pulmonary artery enhancement measured on pulmonary CT angiography as a finding to predict outcome in patients with massive or submassive pulmonary embolism
Creators: name: Kim, Kwan Sup
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Cardiovascular system
subject: CT-Angiography
subject: Contrast agent-intravenous
subject: Embolism / Thrombosis

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The 3 months mortality rate of patient with acute pulmonary embolism accompanied with hemodynamic stability has been known as 3~15% depending on different studies 1, 2 . In particular, in case of massive pulmonary embolism accompanied with right...
New Distributed Optimization Method for TSO-DSO Coordinated Grid Operation Preserving Power System Operator Sovereignity
Creators: name: Meinecke, Steffen
name: Stock, David Sebastian
name: Braun, Martin
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: optimal power flow
subject: voltage control
subject: reactive power dispatch
subject: transmission system operator
subject: distribution system operator
subject: multi-voltage level
subject: fairness
subject: 620
subject: Netzregelung
subject: Netzbetrieb
subject: Verteilungsnetz
subject: Übertragungsnetz
subject: Blindleistung
subject: Betriebsgesellschaft

description: Gefördert durch den Publikationsfonds der Universität Kassel
title: guidelines for CT paranasal sinuses
Creators: name: Macdonald, Katy
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Inflammation
subject: Safety
subject: CT
subject: Ear / Nose / Throat

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: CT Paranasal sinuses is one of the most commonly requested radiological investigations from the otolaryngology outpatient department. There are no formal guidelines for its use, although guidance has been given via the European Position Paper on...
title: Diffusion weighted imaging of the parotid glands in the patients with Sjogren's syndrome
Creators: name: Ma, Lin
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Head and neck
subject: Salivary glands
subject: MR-Diffusion/Perfusion
subject: Diagnostic procedure
subject: Metabolic disorders

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Sjogren's syndrome is an autoimmune disease, and commonly involved exocrine glands such as parotid glands, salivary and lacrimal glands, resulting dry eyes and dry mouth(1). Current imaing evaluation of parotid glands included 99m Technetium...
Common Patterns in Block-Based Robot Programs
Creators: name: Obermüller, Florian
name: Pernerstorfer, Robert
name: Bailey, Lisa
name: Heuer, Ute
name: Fraser, Gordon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.5; K.3.2
subject: 97P50

description: Programmable robots are engaging and fun to play with, interact with the real world, and are therefore well suited to introduce young learners to programming. Introductory robot programming languages often extend existing block-based languages such as Scratch. While teaching programming with such languages is well established, the interaction with the real world in robot programs leads to specific challenges, for which learners and educators may require assistance and feedback. A practical approach to provide this feedback is by identifying and pointing out patterns in the code that are indicative of good or bad solutions. While such patterns have been defined for regular block-based programs, robot-specific programming aspects have not been considered so far. The aim of this paper is therefore to identify patterns specific to robot programming for the Scratch-based mBlock programming language, which is used for the popular mBot and Codey Rocky robots. We identify: (1) 26 bug patterns, which indicate erroneous code; (2) three code smells, which indicate code that may work but is written in a confusing or difficult to understand way; and (3) 18 code perfumes, which indicate aspects of code that are likely good. We extend the LitterBox analysis framework to automatically identify these patterns in mBlock programs. Evaluated on a dataset of 3,540 mBlock programs, we find a total of 6,129 instances of bug patterns, 592 code smells and 14,495 code perfumes. This demonstrates the potential of our approach to provide feedback and assistance to learners and educators alike for their mBlock robot programs.
description: To be published in the Proceedings of the 17th Workshop in Primary and Secondary Computing Education (WIPSCE'22)
Large deviation function for the number of eigenvalues of sparse random graphs inside an interval
Creators: name: Metz, Fernando L.
name: Castillo, Isaac Pérez
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a general method to obtain the exact rate function $Ψ_{[a,b]}(k)$ controlling the large deviation probability $\text{Prob}[\mathcal{I}_N[a,b]=kN] \asymp e^{-NΨ_{[a,b]}(k)}$ that a $N \times N$ sparse random matrix has $\mathcal{I}_N[a,b]=kN$ eigenvalues inside the interval $[a,b]$. The method is applied to study the eigenvalue statistics in two distinct examples: (i) the shifted index number of eigenvalues for an ensemble of Erdös-Rényi graphs and (ii) the number of eigenvalues within a bounded region of the spectrum for the Anderson model on regular random graphs. A salient feature of the rate function in both cases is that, unlike rotationally invariant random matrices, it is asymmetric with respect to its minimum. The asymmetric character depends on the disorder in a way that is compatible with the distinct eigenvalue statistics corresponding to localized and delocalized eigenstates. The results also show that the number variance $σ_{N}^{2}$ for the Anderson model on a regular graph scales as $σ_{N}^{2} \propto N$ ($N \gg 1$) for any nonzero disorder, which is consistent with the absence of level-repulsion in the extended phase. Our theoretical findings are thoroughly compared to numerical diagonalization in both cases, showing a reasonable good agreement.
description: 6 pages, 3 figures
MARVEL - D3.2: Efficient deployment of AI-optimised ML/DL models – initial version
Creators: name: Papoutsakis, Manos
name: Barmpaki, Anthi
name: Michalodimitrakis, Manolis
Publisher: name: Zenodo
Year: 2022
Subjects: E2F2C
Kubernetes
orchestration
containers
ML compression

description: The purpose of this deliverable is to describe the MARVEL Edge-to-Fog-Cloud framework as the deployment layer for the AI/DL MARVEL components. This framework incorporates the deployment logic that is hidden behind MARVdash, the proposed Kubernetes dashboard for instantiating services as orchestrated containers, and deploying them to desired execution sites based on optimisation strategy. The main goal of the optimisation strategy is for MARVEL components to be deployed into Kubernetes nodes based on their resource requirements and the resource offerings of the actual nodes. Moreover, this deliverable will describe methods for compressing machine learning algorithms/models based on the resources available at the edge (e.g., reducing the size and operation time of million-parameter deep learning models). Such compression could minimise the computational overhead on the edge servers.
title: The value of (U)SPIO by differentiating abscesses from tumors.
Creators: name: Seyfer, Perla
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Molecular imaging
subject: Contrast agents
subject: Abdomen
subject: MR
subject: Ultrasound
subject: CT
subject: Contrast agent-intravenous
subject: Molecular imaging
subject: Experimental investigations
subject: Cancer
subject: Inflammation
subject: Arteriosclerosis

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The differentiation between benign and malignant lesions is still an unsolved challenge for non-invasive diagnostic modalities. Magnetic resonance imaging (MRI) provides images with excellent anatomical detail and soft-tissue contrast but is...
title: Application of CARE kV and SAFIRE in Contrast-Enhanced CT Examination on Thorax
Creators: name: Zhuodong, Xu
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Quality assurance
subject: Technical aspects
subject: CT
subject: Thorax

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: To evaluate the potential of automated tube potential selection algorithm (CARE kV) and Sinogram Affirmed Iterative Reconstruction (SAFIRE) to improve image quality while reduce the radiation dose of...
Time reversal method with stabilizing boundary conditions for Photoacoustic tomography
Creators: name: Chervova, Olga
name: Oksanen, Lauri
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study an inverse initial source problem that models Photoacoustic tomography measurements with array detectors, and introduce a method that can be viewed as a modification of the so called back and forth nudging method. We show that the method converges at an exponential rate under a natural visibility condition, with data given only on a part of the boundary of the domain of wave propagation. In this paper we consider the case of noiseless measurements.
description: Revised Version, accepted to the IOP Journal of Inverse Problems
Common Problems and Effects of Feedback on Fun When Programming Ozobots in Primary School
Creators: name: Greifenstein, Luisa
name: Graßl, Isabella
name: Heuer, Ute
name: Fraser, Gordon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: K.3.2; D.2.6
subject: 97P50

description: Computational thinking is increasingly introduced at primary school level, usually with some form of programming activity. In particular, educational robots provide an opportunity for engaging students with programming through hands-on experiences. However, primary school teachers might not be adequately prepared for teaching computer science related topics, and giving feedback to students can often be challenging: Besides the content of the feedback (e.g., what problems have to be handled), the way the feedback is given is also important, as it can lead to negative emotional effects. To support teachers with the way of giving feedback on common problems when teaching programming with robotics, we conducted a study consisting of seven workshops with three third and four fourth grade primary school classes. Within seven different activities, the 116 primary school children first programmed the Ozobot Evo robot in the pen-and-paper mode and then on a digital device. Throughout these activities we collected data on the problems the students encountered, the feedback given, and the fun they experienced. Our analysis reveals eight categories of problems, which we summarise in this paper together with corresponding possible feedback. We observed that problems that are urgent or can harm the students' self-efficacy have a negative impact on how enjoyable an activity is perceived. While direct instruction significantly decreased the experienced fun, hints had a positive effect. Generally, we found programming the Ozobot Evo to be encouraging for both girls and boys. To support teachers, we discuss ideas for giving encouraging feedback on common problems of Ozobot Evo programming activities and how our findings transfer to other robots.
description: To be published in the Proceedings of the 17th Workshop in Primary and Secondary Computing Education (WIPSCE'22)
title: Value of double inversion recovery sequence (DIR) in magnetic resonanace imaging of multiple sclerosis, compared to T2 and FALIR weighted sequences.
Creators: name: El-Nekidy, Abdel-Aziz
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Neuroradiology brain
subject: MR
subject: Diagnostic procedure
subject: Inflammation

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: This study aimed to assess the value of double inversion recovery (DIR) sequence in the detection ofdemylinating lesions in patients with multiple sclerosis (MS) compared to T2 and FLAIR weighted...
title: An audit of chest X-ray requests in acute medical settings at a London teaching hospital – are guidelines being met?
Creators: name: Sharif, Ban
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Quality assurance
subject: Education and training
subject: Acute
subject: Radiation safety
subject: Cost-effectiveness
subject: Audit and standards
subject: Conventional radiography
subject: Respiratory system
subject: Radioprotection / Radiation dose

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The chest x-ray (CXR) exposes a patient to approximately three days of background radiation 1 . This could be considered negligible if performed once. However, many patients will encounter repeated CXR, for instance those with obstructive lung...
Multi Spectral Switchable Infra-Red Reflectance Resonances in Highly Subwavelength Partially Oxidized Vanadium Thin Films
Creators: name: P, Ashok
name: Chauhan, Yogesh Singh
name: Verma, Amit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Phase transition materials are promising for realization of switchable optics. In this work, we show reflectance resonances in the near-infrared and long-wave infrared wavelengths in highly subwavelength partially oxidized Vanadium thin films. These partially oxidized films consist of a multilayer of Vanadium dioxide and Vanadium as shown using Raman spectroscopy and four-probe measurements. As Vanadium dioxide is a phase transition material that shows insulator to metal phase transition at 68 C, the observed infra-red resonances can be switched with temperature into a high-reflectance state. The wavelength of these resonances are passively tunable as a function of the oxidation duration. The obtained reflectance resonance at near-infrared wavelength red shifts from 1.78 um to 2.68 um with increasing oxidation duration while the long-wavelength infrared resonance blue shifts from 12.68 um to 9.96 um. To find the origin of the reflectance resonances, we model the reflectance spectra as a function of the oxidation duration using the transfer matrix method. The presented model captures the dual reflectance resonances reasonably well. These passive wavelength-tunable and switchable resonances with easy to fabricate lithography-free multilayer structure will be useful for multispectral applications such as camouflage, spectral selective microbolometer, and thermal management.
description: 10 pages, 3 figures
A General Framework of Automorphic Inflation
Creators: name: Schimmrigk, Rolf
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Automorphic inflation is an application of the framework of automorphic scalar field theory, based on the theory of automorphic forms and representations. In this paper the general framework of automorphic and modular inflation is described in some detail, with emphasis on the resulting stratification of the space of scalar field theories in terms of the group theoretic data associated to the shift symmetry, as well as the automorphic data that specifies the potential. The class of theories based on Eisenstein series provides a natural generalization of the model of $j$-inflation considered previously.
description: 30 pages, corrected typos
title: Intra-operative Hepatic Artery Thrombosis versus Postoperative Hepatic Artery Thrombosis after Liver Transplantation and an Analysis of Risk Factors: a Matched Case-Control Study.
Creators: name: Bekker, Jasper
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Abdomen
subject: Interventional vascular
subject: Vascular
subject: CT-Angiography
subject: Ultrasound-Colour Doppler
subject: Percutaneous
subject: Catheters
subject: Complications
subject: Intraoperative
subject: Haemodynamics / Flow dynamics
subject: Transplantation
subject: Outcomes

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Early hepatic artery thrombosis (eHAT) after liver transplantation is a disastrous event, which has a huge impact. This is reflected by reported patient mortality rates of up to 30% and graft loss rates of up to 50% in patients with eHAT...
Sci-GaIA Deliverable D1.3 - e-Infrastructure Sentinel Report
Creators: name: Becker, Bruce
Publisher: name: Sci-GaIA Open Access Repository
Year: 2017

description: This deliverable presents the status of the activities of WP1 (Promote the uptake of Science Gateways and e-Infrastructures in Africa and Beyond), Task 1.4 (Ensure the interoperability and interoperation between the African, the EU and the global e-Infrastructures)
1D to 3D Crossover of a Spin-Imbalanced Fermi Gas
Creators: name: Revelle, Melissa C.
name: Fry, Jacob A.
name: Olsen, Ben A.
name: Hulet, Randall G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We have characterized the one-dimensional (1D) to three-dimensional (3D) crossover of a two-component spin-imbalanced Fermi gas of 6-lithium atoms in a 2D optical lattice by varying the lattice tunneling and the interactions. The gas phase separates, and we detect the phase boundaries using in situ imaging of the inhomogeneous density profiles. The locations of the phases are inverted in 1D as compared to 3D, thus providing a clear signature of the crossover. By scaling the tunneling rate with respect to the pair binding energy, we observe a collapse of the data to a universal crossover point at a scaled tunneling value of 0.025(7).
description: 5 pages, 4 figures
title: Impact of thrombocytopenia on radiofrequency ablation therapy of hepatocellular carcinoma in patients with liver cirrhosis
Creators: name: Ahmad, Medhat
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Interventional non-vascular
subject: Ultrasound
subject: Ablation procedures
subject: Neoplasia

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The objective of our study was to assess the impact of thrombocytopenia on percutaneous radiofrequency ablation (RFA) therapy of Hepatocellular carcinoma (HCC) in patients with liver...