cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Storage enhanced nonlinearities in a cold atomic Rydberg ensemble
Creators: name: Distante, Emanuele
name: Padrón-Brito, Auxiliadora
name: Cristiani, Matteo
name: Paredes-Barato, David
name: de Riedmatten, Hugues
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The combination of electromagnetically induced transparency (EIT) with the nonlinear interaction between Rydberg atoms provides an effective interaction between photons. In this paper, we investigate the storage of optical pulses as collective Rydberg atomic excitations in a cold atomic ensemble. By measuring the dynamics of the stored Rydberg polaritons, we experimentally demonstrate that storing a probe pulse as Rydberg polaritons strongly enhances the Rydberg mediated interaction compared to the slow propagation case. We show that the process is characterized by two time scales. At short storage times, we observe a strong enhancement of the interaction due to the reduction of the Rydberg polariton group velocity down to zero. For longer storage times, we observe a further, weaker enhancement dominated by Rydberg induced dephasing of the multiparticle components of the state. In this regime, we observe a non-linear dependence of the Rydberg polariton coherence time with the input photon number. Our results have direct consequences in Rydberg quantum optics and enable the test of new theories of strongly interacting Rydberg systems.
description: Peer-reviewed version. Main text: 6 pages, 4 figures. Added supplemental material: 4 pages, 6 figures
Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The pseudorapidity density of charged particles ($\mathrm{d}N_\mathrm{ch}/\mathrm{d}η$) at mid-rapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}}$ = 5.02 TeV. It increases with centrality and reaches a value of $1943 \pm 54$ in $|η|<0.5$ for the 5% most central collisions. A rise in $\mathrm{d}N_\mathrm{ch}/\mathrm{d}η$ as a function of $\sqrt{s_{\rm NN}}$ for the most central collisions is observed, steeper than that observed in proton-proton collisions and following the trend established by measurements at lower energy. The centrality dependence of $\mathrm{d}N_\mathrm{ch}/\mathrm{d}η$ as a function of the average number of participant nucleons, ${\langle N_\mathrm{part} \rangle}$, calculated in a Glauber model, is compared with the previous measurement at lower energy. A constant factor of about 1.2 describes the increase in $\frac{2}{\langle N_\mathrm{part} \rangle}\langle \mathrm{d}N_\mathrm{ch}/\mathrm{d}η\rangle$ from $\sqrt{s_{\rm NN}}$ = 2.76 TeV to $\sqrt{s_{\rm NN}}$ = 5.02 TeV for all centrality intervals, within the measured range of 0-80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions.
description: 17 pages, 3 captioned figures, 1 table, authors from page 12, published version, figures a http://aliceinfo.cern.ch/ArtSubmission/node/2215
Ab initio quantum approach to electron-hole exchange for semiconductors hosting Wannier excitons
Creators: name: Combescot, Monique
name: Amand, Thierry
name: Shiau, Shiue-Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a quantum approach to "electron-hole exchange", better named electron-hole pair exchange, that makes use of the second quantization formalism to describe the problem in terms of Bloch-state electron operators. This approach renders transparent the fact that such singular effect comes from interband Coulomb processes. We first show that, due to the sign change when turning from valence-electron destruction operator to hole creation operator, the interband Coulomb interaction only acts on spin-singlet electron-hole pairs, just like the interband electron-photon interaction, thereby making these spin-singlet pairs optically bright. We then show that when written in terms of reciprocal lattice vectors ${\bf G}_m$, the singularity of the interband Coulomb scattering in the small wave-vector transfer limit entirely comes from the ${\bf G}_m = 0$ term, which renders its singular behavior easy to calculate. Comparison with the usual real-space formulation in which the singularity appears through a sum of "long-range processes" over all ${\bf R}\not= 0$ lattice vectors once more proves that periodic systems are easier to handle in terms of reciprocal vectors ${\bf G}_m$ than in terms of lattice vectors $\bf R$. Well-accepted consequences of the electron-hole exchange on excitons and polaritons are reconsidered and refuted for different major reasons.
description: 15 pages, 8 figures
Kodaira-Spencer isomorphisms and degeneracy maps on Iwahori-level Hilbert modular varieties: the saving trace
Creators: name: Diamond, Fred
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G18 (primary), 11F32, 11F41, 14G35 (secondary)

description: We consider integral models of Hilbert modular varieties with Iwahori level structure at primes over p, first proving a Kodaira-Spencer isomorphism that gives a concise description of their dualizing sheaves. We then analyze fibres of the degeneracy maps to Hilbert modular varieties of level prime to p and deduce the vanishing of higher direct images of structure and dualizing sheaves, generalizing prior work with Kassaei and Sasaki (for p unramified in the totally real field F). We apply the vanishing results to prove flatness of the finite morphisms in the resulting Stein factorizations, and combine them with the Kodaira-Spencer isomorphism to simplify and generalize the construction of Hecke operators at primes over p on Hilbert modular forms (integrally and mod p).
description: 78 pages (added details, examples, minor corrections and updates to v2)
title: Characterization of brast cancer by Photoacoustic mammography
Creators: name: Torii, Masae
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Neoplasia
subject: Experimental investigations
subject: Mammography
subject: Experimental
subject: Breast

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Tissue hypoxia was prevalently observed in most of cancers and proved to be closely associated with tumor progressions, metastasis, invasion, angiogenesis, altered metabolism and resistance to chemotherapy. [1, 2] Optical measurement attracts much...
title: What a radiologist need to know about Diffuse Liver Diseases
Creators: name: DAGUM, MARIO
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Metabolic disorders
subject: Education
subject: Ultrasound
subject: MR
subject: CT
subject: MR physics
subject: Abdomen
subject: Liver

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: To describe the most frequent patterns of the Diffuse Liver Diseases (DFD) on MRI, CT and Ultrasound, in order to characterize and differentiate them from other...
Pure Lovelock gravity and Chern-Simons theory
Creators: name: Concha, P. K.
name: Durka, R.
name: Inostroza, C.
name: Merino, N.
name: Rodríguez, E. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the possibility of finding Pure Lovelock gravity as a particular limit of a Chern-Simons action for a specific expansion of the AdS algebra in odd dimensions. We derive this relation at the level of the action in five and seven dimensions. Additionally we provide the general result for higher dimensions and discuss some issues arising from the obtained dynamics.
description: 23 pages; V4: published version
Stability results, almost global generalized Beltrami fields and applications to vortex structures in the Euler equations
Creators: name: Enciso, Alberto
name: Poyato, David
name: Soler, Juan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Strong Beltrami fields have long played a key role in fluid mechanics and magnetohydrodynamics. In particular, they are the kind of stationary solutions of the Euler equations where one has been able to show the existence of vortex structures (vortex tubes and vortex lines) of arbitrarily complicated topology. On the contrary, there are very few results about the existence of generalized Beltrami fields, that is, divergence-free fields whose curl is the field itself times a non-constant function. In fact, generalized Beltrami fields (which are also stationary solutions to the Euler equations) have been recently shown to be rare, in the sense that for "most" proportionality factors there are no nontrivial Beltrami fields of high enough regularity (e.g., of class $C^{6,α}$), not even locally. We show that, nevertheless, there are "many" Beltrami fields with non-constant factor, even realizing arbitrarily complicated vortex structures. The core results are an "almost global" stability theorem for strong Beltrami fields, which ensures that a global strong Beltrami field with suitable decay at infinity can be perturbed to get "many" Beltrami fields with non-constant factor of arbitrarily high regularity and defined in the exterior of an arbitrarily small ball, and a "local" stability theorem for generalized Beltrami fields, which is an analogous perturbative result that is valid for any kind of Beltrami field (not just with a constant factor) but only applies to small enough domains. The proof relies on an iterative scheme of Grad-Rubin type. For this purpose, we study the Neumann problem for the inhomogeneous Beltrami equation in exterior domains via a boundary integral equation method and we obtain Hölder estimates, a sharp decay at infinity and some compactness properties for these sequences of approximate solutions.
description: 70 pages, 9 figures
AlertTrap: A study on object detection in remote insects trap monitoring system using on-the-edge deep learning platform
Creators: name: Le, An D.
name: Pham, Duy A.
name: Pham, Dong T.
name: Vo, Hien B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Fruit flies are one of the most harmful insect species to fruit yields. In AlertTrap, implementation of Single-Shot Multibox Detector (SSD) architecture with different state-of-the-art backbone feature extractors such as MobileNetV1 and MobileNetV2 appears to be potential solutions for the real-time detection problem. SSD-MobileNetV1 and SSD-MobileNetV2 perform well and result in AP at 0.5 of 0.957 and 1.0, respectively. You Only Look Once (YOLO) v4-tiny outperforms the SSD family with 1.0 in AP at 0.5; however, its throughput velocity is considerably slower, which shows SSD models are better candidates for real-time implementation. We also tested the models with synthetic test sets simulating expected environmental disturbances. The YOLOv4-tiny had better tolerance to these disturbances than the SSD models. The Raspberry Pi system successfully gathered environmental data and pest counts, sending them via email over 4 G. However, running the full YOLO version in real time on Raspberry Pi is not feasible, indicating the need for a lighter object detection algorithm for future research. Among model candidates, YOLOv4-tiny generally performs best, with SSD-MobileNetV2 also comparable and sometimes better, especially in scenarios with synthetic disturbances. SSD models excel in processing time, enabling real-time, high-accuracy detection.
Assessment of meso-dispensers for mating disruption of fall armyworm in maize
Creators: name: Rojas, Julio C.
name: Roblero, Eustrain
name: Malo, Edi A.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences

description: The fall armyworm (FAW) is a significant pest of maize worldwide. Here, we evaluated the feasibility of mating disruption (MD) of FAW and the MD mechanisms involved using hand-applied pheromone dispensers with intermediate release rate and point density in maize plots. To understand the mechanisms underlying the MD of FAW, male captures and device density data were compared using profile analysis. In the first trial, we tested 0, 10, 30, and 40 dispensers/ha, and then 0, 20, 40, and 60 dispensers/ha in the second trial. Male captures were reduced up to 87% in MD plots. In the first trial, the percentage of plants damaged by larvae was lower in plots with 30 and 40 dispensers/ha, whereas in the second trial, the lower percentage of damaged plants was observed in plots treated with 60 pheromone dispensers/ha. There was no difference in maize yield between the MD-treated and control treatments. The profile analysis matched the predictions of hybrid MD mediated by a combination of non-competitive and competitive mechanisms. Although our results showed that sexual communication in FAW adults may be disrupted to a certain extent, further studies are needed to corroborate the potential of MD for FAW management.
title: Can hemangiomas enlarge over time?
Creators: name: Calamita, Valentina
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Metastases
subject: Haemangioma
subject: Contrast agent-intravenous
subject: Ultrasound
subject: MR
subject: CT
subject: Contrast agents
subject: Abdomen
subject: Liver

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: To describe the imaging features and the clinical history of patients with hemangiomas which showed significant increase in diameter over time. To discuss the etiopathogenesis and the mechanism of the enlargement of hemangiomas. To highlight the...
Lattice Gauge Theories and Spin Models
Creators: name: Mathur, Manu
name: Sreeraj, T. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Wegner $Z_2$ gauge theory-$Z_2$ Ising spin model duality in $(2+1)$ dimensions is revisited and derived through a series of canonical transformations. The Kramers-Wannier duality is similarly obtained. The Wegner $Z_2$ gauge-spin duality is directly generalized to SU(N) lattice gauge theory in $(2+1)$ dimensions to obtain the SU(N) spin model in terms of the SU(N) magnetic fields and their conjugate SU(N) electric scalar potentials. The exact and complete solutions of the $Z_2, U(1), SU(N)$ Gauss law constraints in terms of the corresponding spin or dual potential operators are given. The gauge-spin duality naturally leads to a new gauge invariant magnetic disorder operator for SU(N) lattice gauge theory which produces a magnetic vortex on the plaquette. A variational ground state of the SU(2) spin model with nearest neighbor interactions is constructed to analyze SU(2) gauge theory.
description: 24 pages, 15 figures, 1 table. Enlarged and completely reorganized version with many clarifications and extended discussions (one new appendix, 3 new figures and many new references). The version published in Phys. Rev. D
A Graph-based Stratified Sampling Methodology for the Analysis of (Underground) Forums
Creators: name: Di Tizio, Giorgio
name: Siu, Gilberto Atondo
name: Hutchings, Alice
name: Massacci, Fabio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: [Context] Researchers analyze underground forums to study abuse and cybercrime activities. Due to the size of the forums and the domain expertise required to identify criminal discussions, most approaches employ supervised machine learning techniques to automatically classify the posts of interest. [Goal] Human annotation is costly. How to select samples to annotate that account for the structure of the forum? [Method] We present a methodology to generate stratified samples based on information about the centrality properties of the population and evaluate classifier performance. [Result] We observe that by employing a sample obtained from a uniform distribution of the post degree centrality metric, we maintain the same level of precision but significantly increase the recall (+30%) compared to a sample whose distribution is respecting the population stratification. We find that classifiers trained with similar samples disagree on the classification of criminal activities up to 33% of the time when deployed on the entire forum.
Efficient Generation of Inductive Validity Cores for Safety Properties
Creators: name: Ghassabani, Elaheh
name: Gacek, Andrew
name: Whalen, Michael W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Symbolic model checkers can construct proofs of properties over very complex models. However, the results reported by the tool when a proof succeeds do not generally provide much insight to the user. It is often useful for users to have traceability information related to the proof: which portions of the model were necessary to construct it. This traceability information can be used to diagnose a variety of modeling problems such as overconstrained axioms and underconstrained properties, and can also be used to measure completeness of a set of requirements over a model. In this paper, we present a new algorithm to efficiently compute the inductive validity core (IVC) within a model necessary for inductive proofs of safety properties for sequential systems. The algorithm is based on the UNSAT core support built into current SMT solvers and a novel encoding of the inductive problem to try to generate a minimal inductive validity core. We prove our algorithm is correct, and describe its implementation in the JKind model checker for Lustre models. We then present an experiment in which we benchmark the algorithm in terms of speed, diversity of produced cores, and minimality, with promising results.
description: appears in FSE2016: ACM Sigsoft International Symposium on the Foundations of Software Engineering, Seattle, WA, November 13-19, 2016
title: Radiotracer Dose Reduction in High Resolution Breast PET Imaging
Creators: name: Kalinyak, Judy
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Sampling
subject: Diagnostic procedure
subject: PET
subject: Oncology
subject: Nuclear medicine
subject: Breast
subject: Neoplasia

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: LEARNING OBJECTIVES To review the data supporting the value of Positron Emission Mammography in breast cancer pre-surgical planning, to review PET-guided biopsy, and to explore the feasibility of reducing the 18 F-fluorodeoxyglucose (FDG) dose for...
Probing axions with the neutrino signal from the next galactic supernova
Creators: name: Fischer, Tobias
name: Chakraborty, Sovan
name: Giannotti, Maurizio
name: Mirizzi, Alessandro
name: Payez, Alexandre
name: Ringwald, Andreas
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the impact of axion emission in simulations of massive star explosions, as an additional source of energy loss complementary to the standard neutrino emission. The inclusion of this channel shortens the cooling time of the nascent protoneutron star and hence the duration of the neutrino signal. We treat the axion-matter coupling strength as a free parameter to study its impact on the protoneutron star evolution as well as on the neutrino signal. We furthermore analyze the observability of the enhanced cooling in current and next-generation underground neutrino detectors, showing that values of the axion mass $m_a \gtrsim 8 \times 10^{-3}$ eV can be probed. Therefore a galactic supernova neutrino observation would provide a valuable possibility to probe axion masses in a range within reach of the planned helioscope experiment, the International Axion Observatory (IAXO).
description: 20 pages, 13 figures, DESY 16-094, v2: revised version. Discussion clarified. Matches the version accepted at PRD
title: The Use of Multi-Slice CT in Forensic Imaging - A Pictorial Review
Creators: name: Barrett, Sarah
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Forensic / Necropsy studies
subject: CT
subject: Fluoroscopy
subject: Conventional radiography
subject: Comparative studies
subject: Forensics

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: Post mortem imaging is used with increasing frequency to help forensic pathologists determine cause of death. This is usually performed before autopsy. As with all other subspecialties in radiology there are benefits of some modalities over...
One jet to rule them all: monojet constraints and invisible decays of a 750 GeV diphoton resonance
Creators: name: Barducci, Daniele
name: Goudelis, Andreas
name: Kulkarni, Suchita
name: Sengupta, Dipan
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The ATLAS and CMS collaborations recently reported a mild excess in the diphoton final state pointing to a resonance with a mass of around 750 GeV and a potentially large width. We consider the possibility of a scalar resonance being produced via gluon fusion and decaying to electroweak gauge bosons, jets and pairs of invisible particles, stable at collider scales. We compute limits from monojet searches on such a resonance and test their compatibility with the requirement for a large width. We also study whether the stable particle can be a a dark matter candidate and investigate the corresponding relic density constraints along with the collider limits. We show that monojet searches rule out a large part of the available parameter space and point out scenarios where a broad diphoton resonance can be reconciled with monojet constraints.
description: Matches published version
Carey, W., Eine Untersuchung über die Verpflichtung der Christen, Mittel einzusetzen für die Bekehrung der Heiden
Creators: name: Kasdorf, Hans
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1821137825
description: Jahrbuch für evangelikale Theologie, V. 9 (1995): Jahrbuch für evangelikale Theologie, Band 9
Time resolution of the plastic scintillator strips with matrix photomultiplier readout for J-PET tomograph
Creators: name: Moskal, P.
name: Rundel, O.
name: Alfs, D.
name: Bednarski, T.
name: Białas, P.
name: Czerwiński, E.
name: Gajos, A.
name: Giergiel, K.
name: Gorgol, M.
name: Jasińska, B.
name: Kamińska, D.
name: Kapłon, Ł.
name: Korcyl, G.
name: Kowalski, P.
name: Kozik, T.
name: Krzemień, W.
name: Kubicz, E.
name: Niedźwiecki, Sz.
name: Pałka, M.
name: Raczyński, L.
name: Rudy, Z.
name: Sharma, N. G.
name: Słomski, A.
name: Silarski, M.
name: Strzelecki, A.
name: Wieczorek, A.
name: Wiślicki, W.
name: Witkowski, P.
name: Zieliński, M.
name: Zoń, N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability for the detection of annihilation quanta (0.511 MeV) with a coincidence resolving time (CRT) of 0.266 ns. The achieved resolution is almost by a factor of two better with respect to the current TOF-PET detectors and it can still be improved since, as it is shown in this article, the intrinsic limit of time resolution for the determination of time of the interaction of 0.511 MeV gamma quanta in plastic scintillators is much lower. As the major point of the article, a method allowing to record timestamps of several photons, at two ends of the scintillator strip, by means of matrix of silicon photomultipliers (SiPM) is introduced. As a result of simulations, conducted with the number of SiPM varying from 4 to 42, it is shown that the improvement of timing resolution saturates with the growing number of photomultipliers, and that the 2 x 5 configuration at two ends allowing to read twenty timestamps, constitutes an optimal solution. The conducted simulations accounted for the emission time distribution, photon transport and absorption inside the scintillator, as well as quantum efficiency and transit time spread of photosensors, and were checked based on the experimental results. Application of the 2 x 5 matrix of SiPM allows for achieving the coincidence resolving time in positron emission tomography of $\approx$ 0.170 ns for 15 cm axial field-of-view (AFOV) and $\approx$ 0.365 ns for 100 cm AFOV. The results open perspectives for construction of a cost-effective TOF-PET scanner with significantly better TOF resolution and larger AFOV with respect to the current TOF-PET modalities.
description: To be published in Phys. Med. Biol. (26 pages, 17 figures)
Neudorfer, H.-W./Morstein, Th. (Hg.), Christus zur Entscheidung predigen
Creators: name: Nanz, Philipp
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1821138236
description: Jahrbuch für evangelikale Theologie, V. 9 (1995): Jahrbuch für evangelikale Theologie, Band 9
title: Beyond Broken Spines: What the Radiologist needs to know about Late Complications of Spinal Cord Injury
Creators: name: Capps, Erin
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Emergency
subject: Neuroradiology spine
subject: Trauma
subject: CT
subject: MR
subject: Conventional radiography
subject: Education
subject: Trauma
subject: Musculoskeletal spine

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: Illustrate expected imaging findings in survivors of spinal cord injury Educate radiologists about the potential complications encountered in SCI patients with late complications of...
Ultra faint dwarf galaxies: an arena for testing dark matter versus modified gravity
Creators: name: Lin, Weikang
name: Ishak, Mustapha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The scenario consistent with a wealth of observations for the missing mass problem is that of weakly interacting dark matter particles. However, arguments or proposals for a Newtonian or relativistic modified gravity scenario continue to be made. A distinguishing characteristic between the two scenarios is that dark matter particles can produce a gravitational effect, in principle, without the need of baryons while this is not the case for the modified gravity scenario where such an effect must be correlated with the amount of baryonic matter. We consider here ultra-faint dwarf (UFD) galaxies as a promising arena to test the two scenarios based on the above assertion. We compare the correlation of the luminosity with the velocity dispersion between samples of UFD and non-UFD galaxies, finding a significant loss of correlation for UFD galaxies. For example, we find for 28 non-UFD galaxies a strong correlation coefficient of -0.688 which drops to -0.077 for the 23 UFD galaxies. Incoming and future data will determine whether the observed stochasticity for UFD galaxies is physical or due to systematics in the data. Such a loss of correlation (if it is to persist) is possible and consistent with the dark matter scenario for UFD galaxies but would constitute a new challenge for the modified gravity scenario.
description: 13 pages, 3 figures; expanded analysis and paper; matches JCAP published version
title: Preoperative dual source CT coronary angiography in non-cardiac thoracic surgery patients with unknown or suspected coronary artery disease
Creators: name: Li, Xue-Ming
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Cardiac
subject: Cardiovascular system
subject: Vascular
subject: CT-Angiography
subject: CT
subject: Screening

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: A major predisposing factor in the pathogenesis of perioperative cardiovascular events is the presence of ischaemic heart disease, whether diagnosed or previously unknown [1]. Atherosclerosis is the main pathological disorder responsible for the...
Cool WISPs for stellar cooling excesses
Creators: name: Giannotti, Maurizio
name: Irastorza, Igor
name: Redondo, Javier
name: Ringwald, Andreas
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Several stellar systems (white dwarfs, red giants, horizontal branch stars and possibly the neutron star in the supernova remnant Cassiopeia A) show a mild preference for a non-standard cooling mechanism when compared with theoretical models. This exotic cooling could be provided by Weakly Interacting Slim Particles (WISPs), produced in the hot cores and abandoning the star unimpeded, contributing directly to the energy loss. Taken individually, these excesses do not show a strong statistical weight. However, if one mechanism could consistently explain several of them, the hint could be significant. We analyze the hints in terms of neutrino anomalous magnetic moments, minicharged particles, hidden photons and axion-like particles (ALPs). Among them, the ALP or a massless HP represent the best solution. Interestingly, the hinted ALP parameter space is accessible to the next generation proposed ALP searches, such as ALPS II and IAXO and the massless HP requires a multi TeV energy scale of new physics that might be accessible at the LHC.
description: Minor corrections. Expanded presentation of new physics. Added discussion about massless hidden photons. 21 pages, 6 figures
title: Looking for accuracy in the introduction of screws through the pedicle of C2: multidetector CT morphometry
Creators: name: Viteri, Guillermo
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Neuroradiology spine
subject: CT
subject: CT-High Resolution
subject: CT-Quantitative
subject: Diagnostic procedure
subject: Musculoskeletal spine

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Atlanto-axial region is the most mobile segment of the cervical spine, accumulating at least 50 % of the rotational range of movement and 12 % of the flexo-extension mobility 1 . Internal fixation using transarticular screws (as described by Magerl...
Detection of gravitational waves from black holes: Is there a window for alternative theories?
Creators: name: Konoplya, Roman
name: Zhidenko, Alexander
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently LIGO and VIRGO collaborations reported about observation of gravitational-wave signal corresponding to the inspiral and merger of two black holes, resulting into formation of the final black hole. It was shown that the observations are consistent with the Einstein theory of gravity with high accuracy limited mainly by the statistical error. Angular momentum and mass of the final black hole were determined with rather large allowance of tens of percents. Here we shall show that this indeterminacy in the range of the black-hole parameters allows for some not negligible deformations of the Kerr spacetime leading to the same frequencies of black-hole ringing. This means that at the current precision of the experiment there remain some possibilities for alternative theories of gravity.
description: 5 pages, 1 figure
title: Elbow synovial fold syndrome
Creators: name: Cerezal, Luis
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Athletic injuries
subject: Arthrography
subject: Ultrasound
subject: MR
subject: Musculoskeletal joint

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: To provide a comprehensive review of embryologic development, anatomy, histology, and function of the elbow plica. To present physiopathology, clinical findings, differential diagnosis, imaging features, differential diagnosis and treatment of elbow...
Dill maps in the Weyl-like space associated to the Levenshtein distance
Creators: name: Ramdhane, Firas Ben
name: Guillon, Pierre
Publisher: name: arXiv
Year: 2023
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Dynamical Systems (math.DS)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The Weyl pseudo-metric is a shift-invariant pseudo-metric over the set of infinite sequences, that enjoys interesting properties and is suitable for studying the dynamics of cellular automata. It corresponds to the asymptotic behavior of the Hamming distance on longer and longer subwords. In this paper we characterize well-defined dill maps (which are a generalization of cellular automata and substitutions) in the Weyl space and the sliding Feldman-Katok space where the Hamming distance appearing in the Weyl pseudo-metrics is replaced by the Levenshtein distance.
title: Mixed Reality as a Teaching Tool for Medical Students in Neurosurgery
Creators: name: Silvero Isidre, Arturo
name: Friederichs, Hendrik
name: Müther, Michael
name: Gallus, Marco
name: Stummer, Walter
name: Holling, Markus
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2024
Subjects: subject: 610 Medicine and health

description: 'Background and Objectives': Simulation-based learning within neurosurgery provides valuable and realistic educational experiences in a safe environment, enhancing the current teaching model. Mixed reality (MR) simulation can deliver a highly immersive experience through head-mounted displays and has become one of the most promising teaching tools in medical education. We aimed to identify whether an MR neurosurgical simulation module within the setting of an undergraduate neurosurgical hands-on course could improve the satisfaction of medical students. 'Materials and Methods': The quasi-experimental study with 223 medical students [120 in the conventional group (CG) and 103 in the MR-group (MRG)] was conducted at the University Hospital Münster, Münster, Germany. An MR simulation module was presented to the intervention group during an undergraduate neurosurgical hands-on course. Images of a skull fracture were reconstructed into 3D formats compatible with the MR-Viewer (Brainlab, Munich, Germany). Participants could interact virtually with the model and plan a surgical strategy using Magic Leap goggles. The experience was assessed by rating the course on a visual analog scale ranging from 1 (very poor) to 100 (very good) and an additional Likert-scale questionnaire. 'Results': The satisfaction score for CG and MRG were 89.3 ± 13.3 and 94.2 ± 7.5, respectively. The Wilcoxon rank-sum test showed that MR users (Mdn = 97.0, IQR = 4, n = 103) were significantly more satisfied than CG users (Mdn = 93.0, IQR = 10, n = 120; ln(W) = 8.99, p < 0.001) with moderate effect size (𝑟̂𝑏𝑖𝑠𝑒𝑟𝑖𝑎𝑙 = 0.30, CI95 [0.15, 0.43]), thus indicating that the utilization of MR-simulation is associated with greater satisfaction. 'Conclusions': This study reports a positive response from medical students towards MR as an educational tool. Feedback from the medical students encourages the adoption of disruptive technologies into medical school curricula.
description: Finanziert durch den Open-Access-Publikationsfonds der Universität Münster.
title: Virtually-tracked soft tissues interventional procedures under US guidance: preliminary evaluation on a biologic model
Creators: name: Fabbro, Emanuele
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Arthritides
subject: Diagnostic procedure
subject: Ultrasound
subject: Musculoskeletal soft tissue
subject: Interventional non-vascular

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: The purpose of our work is to describe accuracy, safety and potential uses of a new needle tracking system in musculo-skeletal US-guided percutaneous procedures on a biologic model. The ability to guide the needle when performing US-guided needle...
Right-Handed Neutrinos and T-Violating, P-Conserving Interactions
Creators: name: El-Menoufi, Basem Kamal
name: Ramsey-Musolf, Michael J.
name: Seng, Chien-Yeah
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that experimental probes of the P-conserving, T-violating triple correlation in polarized neutron or nuclear $β$-decay provide a unique probe of possible T-violation at the TeV scale in the presence of right-handed neutrinos. In contrast to other possible sources of semileptonic T-violation involving only left-handed neutrinos, those involving right-handed neutrinos are relatively unconstrained by present limits on the permanent electric dipole moments of the electron, neutral atoms, and the neutron. On the other hand, LHC results for $pp\to e+$ missing transverse energy imply that an order of magnitude of improvement in $D$-coefficient sensitivity would be needed for discovery. Finally, we discuss the interplay with the scale of neutrino mass and naturalness considerations.
description: 6 pages, 2 figures
Boundedness of the $p$-primary torsion of the Brauer group of an abelian variety
Creators: name: D'Addezio, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14F22, 19E15, 14F42, 14C25, 14F30

description: We prove that the $p^\infty$-torsion of the transcendental Brauer group of an abelian variety over a finitely generated field of characteristic $p>0$ is bounded. This answers a (variant of a) question asked by Skorobogatov and Zarhin for abelian varieties. To do this, we prove a "flat Tate conjecture" for divisors. In the text, we also study other geometric Galois-invariant $p^\infty$-torsion classes of the Brauer group which are not in the transcendental Brauer group. These classes, in contrast with our main theorem, can be infinitely $p$-divisible. We explain how the existence of these $p$-divisible towers is naturally related to the failure of surjectivity of specialisation morphisms of Néron--Severi groups in characteristic $p$.
description: 19 pages; final version, to appear in Compositio Mathematica
title: Exploring the Suprahyoid Neck: From Anatomy to Pathology
Creators: name: Abreu, Elisa
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Pathology
subject: eLearning
subject: Education
subject: MR
subject: CT
subject: Head and neck

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: - Approach to the various spaces of the suprahyoid neck and their anatomic components. - To understand the complex anatomy of the suprahyoid part of the neck focusing on CT and MR imaging findings. - To be familiar with the most important...
Packing minor-closed families of graphs into complete graphs
Creators: name: Messuti, Silvia
name: Rödl, Vojtěch
name: Schacht, Mathias
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C70 (primary), 05C51 (secondary)

description: Motivated by a conjecture of Gyárfás, recently Böttcher, Hladký, Piguet, and Taraz showed that every collection $T_1,\dots,T_t$ of trees on $n$ vertices with $\sum_{i=1}^te(T_i)\leq \binom{n}{2}$ and with bounded maximum degree, can be packed into the complete graph on $(1+o(1))n$ vertices. We generalise this result where we relax the restriction of packing families of trees to families of graphs of any given non-trivial minor-closed class of graphs.
description: 21 pages, accepted for publication in Journal of Combinatorial Theory, Series B
title: Breast US in Patients with Breast Cancer Presenting as Microcalcifications Only on Mammography: Can US Differentiate DCIS from Invasive Cancer?
Creators: name: Kang, Jiyoung
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Neoplasia
subject: Imaging sequences
subject: Ultrasound
subject: Breast

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: To review US findings of breast cancers presenting as microcalcifications only on mammography and to evaluate helpful findings in differentiating DCIS from invasive cancer . In many recent studies, targeted ultrasonography (US) of mammographically...
Routing Autonomous Vehicles in Congested Transportation Networks: Structural Properties and Coordination Algorithms
Creators: name: Zhang, Rick
name: Rossi, Federico
name: Pavone, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: This paper considers the problem of routing and rebalancing a shared fleet of autonomous (i.e., self-driving) vehicles providing on-demand mobility within a capacitated transportation network, where congestion might disrupt throughput. We model the problem within a network flow framework and show that under relatively mild assumptions the rebalancing vehicles, if properly coordinated, do not lead to an increase in congestion (in stark contrast to common belief). From an algorithmic standpoint, such theoretical insight suggests that the problem of routing customers and rebalancing vehicles can be decoupled, which leads to a computationally-efficient routing and rebalancing algorithm for the autonomous vehicles. Numerical experiments and case studies corroborate our theoretical insights and show that the proposed algorithm outperforms state-of-the-art point-to-point methods by avoiding excess congestion on the road. Collectively, this paper provides a rigorous approach to the problem of congestion-aware, system-wide coordination of autonomously driving vehicles, and to the characterization of the sustainability of such robotic systems.
description: 11 pages, 3 figures. Presented at Robotics: Science and Systems (RSS) 2016. Version 2 is the extended version of the final submission included in the conference proceedings. The title of the initial submission was modified in deference to RSS's double-blind submission process: in this version, the title matches the published paper
Software Development in Startup Companies: The Greenfield Startup Model
Creators: name: Giardino, Carmine
name: Paternoster, Nicolò
name: Unterkalmsteiner, Michael
name: Gorschek, Tony
name: Abrahamsson, Pekka
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software startups are newly created companies with no operating history and oriented towards producing cutting-edge products. However, despite the increasing importance of startups in the economy, few scientific studies attempt to address software engineering issues, especially for early-stage startups. If anything, startups need engineering practices of the same level or better than those of larger companies, as their time and resources are more scarce, and one failed project can put them out of business. In this study we aim to improve understanding of the software development strategies employed by startups. We performed this state-of-practice investigation using a grounded theory approach. We packaged the results in the Greenfield Startup Model (GSM), which explains the priority of startups to release the product as quickly as possible. This strategy allows startups to verify product and market fit, and to adjust the product trajectory according to early collected user feedback. The need to shorten time-to-market, by speeding up the development through low-precision engineering activities, is counterbalanced by the need to restructure the product before targeting further growth. The resulting implications of the GSM outline challenges and gaps, pointing out opportunities for future research to develop and validate engineering practices in the startup context.
title: Retrospective audit of endovascular popliteal aneurysm repair
Creators: name: Kovacs, Flora
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Vascular
subject: Extremities
subject: Interventional vascular
subject: Catheter arteriography
subject: CT-Angiography
subject: Audit and standards
subject: Stents
subject: Treatment effects
subject: Aneurysms
subject: Embolism / Thrombosis
subject: Obstruction / Occlusion

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: PURPOSE: The aim of our audit was to determine the efficacy and safety of Popliteal Artery Aneurysm (PAA) cases treated with Viabahn Stentgrafts in Royal Derby Hospital (from August 2008 to September 2011) if consistent withthe national standards...
Marchlowitz, B., Freikirchlicher Gemeindeauibau
Creators: name: Stadelmann, Helge
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1821138171
description: Jahrbuch für evangelikale Theologie, V. 9 (1995): Jahrbuch für evangelikale Theologie, Band 9
title: Dose at an interventional reference point: Comparison between displayed values of X-ray units and actual measured values
Creators: name: Chida, Koichi
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Occupational / Environmental hazards
subject: Radiation safety
subject: Physics
subject: Dosimetry
subject: Fluoroscopy
subject: Digital radiography
subject: Catheter arteriography
subject: Radioprotection / Radiation dose
subject: Radiation physics
subject: Interventional vascular

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: To understand the importance of dose at the interventional reference point (reference dose) in interventional radiology (IR). To discuss the accuracy of displayed reference doses in IR X-ray equipment. To show the importance of evaluating the...