cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on Randall-Sundrum model from top-antitop production at the LHC
Creators: name: Ayazi, Seyed Yaser
name: Najafabadi, Mojtaba Mohammadi
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the top pair production cross section at the LHC in the context of Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is shown that the recent measurement of the cross section of this process at the LHC restricts the parameter space in Randall-Sundrum (RS) model considerably. We show that the coupling parameter ($\frac{k}{\bar{M}_{pl}}$) is excluded by this measurement from 0.03 to 0.22 depending on the mass of first KK excited graviton ($m_1$). We also study the effect of KK excitations on the spin correlation of the top pairs. It is shown that the spin asymmetry in $t\bar{t}$ events is sensitive to the RS model parameters with a reasonable choice of model parameters.
description: 17 pages, 6 figures
title: Charles Le Gobien S.J.
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Charles Le Gobien S.J. as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Six-dimensional (1,0) effective action of F-theory via M-theory on Calabi-Yau threefolds
Creators: name: Bonetti, Federico
name: Grimm, Thomas W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The six-dimensional effective action of F-theory compactified on a singular elliptically fibred Calabi-Yau threefold is determined by using an M-theory lift. The low-energy data are derived by comparing a circle reduction of a general six-dimensional (1,0) gauged supergravity theory with the effective action of M-theory on the resolved Calabi-Yau threefold. The derivation includes six-dimensional tensor multiplets for which the (anti-) self-duality constraints are imposed on the level of the five-dimensional action. The vector sector of the reduced theory is encoded by a non-standard potential due to the Green-Schwarz term in six dimensions. This Green-Schwarz term also contains higher curvature couplings which are considered to establish the full map between anomaly coefficients and geometry. F-/M-theory duality is exploited by moving to the five-dimensional Coulomb branch after circle reduction and integrating out massive vector multiplets and matter hypermultiplets. The associated fermions then generate additional Chern-Simons couplings at one-loop. Further couplings involving the graviphoton are induced by quantum corrections due to excited Kaluza-Klein modes. On the M-theory side integrating out massive fields corresponds to resolving the singularities of the Calabi-Yau threefold, and yields intriguing relations between six-dimensional anomalies and classical topology.
description: 55 pages, v2: typos corrected, discussion of loop corrections improved
title: Peter Ambrosius Lehmann
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Peter Ambrosius Lehmann as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Erratum: On the torsion of Chow groups of twisted Spin-flags
Creators: name: Baek, Sanghoon
name: Zainoulline, Kirill
name: Zhong, Changlong
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 13A50, 14L24, 20F55

description: In the erratum we correct a mistake (due to a wrong choice of basic polynomial invariants over Z[1/2]) in the original paper (v1). Using the correct basic polynomial invariants we improve our results and bounds on the annihilator. We also simplify some of the proofs.
description: 3 pages
Discovery of Five New Pulsars in Archival Data
Creators: name: Mickaliger, Mitchell B.
name: Lorimer, Duncan R.
name: Boyles, Jason
name: McLaughlin, Maura A.
name: Collins, Adam
name: Hough, Logan
name: Tehrani, Nathan
name: Tenney, Craig
name: Liska, April
name: Swiggum, Joseph
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Reprocessing of the Parkes Multibeam Pulsar Survey has resulted in the discovery of five previously unknown pulsars and several as-yet-unconfirmed candidates. PSR J0922-52 has a period of 9.68 ms and a DM of 122.4 pc cm^-3. PSR J1147-66 has a period of 3.72 ms and a DM of 133.8 pc cm^-3. PSR J1227-6208 has a period of 34.53 ms, a DM of 362.6 pc cm^-3, is in a 6.7 day binary orbit, and was independently detected in an ongoing high-resolution Parkes survey by Thornton et al. and also in independent processing by Einstein@Home volunteers. PSR J1546-59 has a period of 7.80 ms and a DM of 168.3 pc cm^-3. PSR J1725-3853 is an isolated 4.79-ms pulsar with a DM of 158.2 pc cm^-3. These pulsars were likely missed in earlier processing efforts due to their high DMs and short periods and the large number of candidates that needed to be looked through. These discoveries suggest that further pulsars are awaiting discovery in the multibeam survey data.
description: 12 pages, 2 figures, 2 tables, accepted to ApJ
title: Johanna Regina Leibniz
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Johanna Regina Leibniz as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
title: Friedrich Wilhelm Leidenfrost
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Friedrich Wilhelm Leidenfrost as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
title: Johann Lorenz Leincker
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Johann Lorenz Leincker as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
High-frequency very long baseline interferometry studies of NRAO 530
Creators: name: Lu, R. -S.
name: Krichbaum, T. P.
name: Zensus, J. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: NRAO 530 is an optically violent variable source and has been studied with multi-epoch multi-frequency high-resolution VLBI observations. NRAO 530 was monitored with the VLBA at three frequencies (22, 43 and 86 GHz) on 10 consecutive days in 2007 May during observations of the Galactic Center (Sgr A*). Furthermore, analysis of archival data of NRAO 530 at 15 GHz over the last ten years allows us to study its detailed jet kinematics. We identified the compact component located at the southern-end of the jet as the VLBI core, consistent with previous studies. The 10-d monitoring data at the 3 high frequencies were shown to produce high quality and self-consistent measurements of the component positions, from which we detected for the first time a two-dimensional frequency-dependent position shift. In addition, the repeated measurements also permit us to investigate the interday flux density and structure variability of NRAO 530. We find that it is more variable for the inner jet components than those further out. We obtained apparent velocities for eight jet components with $β_{\rm app} ranging from 2 to 26 c. Accordingly, we estimated physical jet parameters with the minimum Lorentz factor of 14 and Doppler factors in the range of 14--28 (component f). The changes in the morphology of NRAO 530 were related to the motion of separate jet components with the most pronounced changes occurring in the regions close to the core. For NRAO 530, we estimated a P.A. swing of $3^{\circ}.4$ per year for the entire inner jet (components d and e). The non-ballistic motion and change of jet orientation makes this source another prominent example of a helical and possibly `swinging' jet.
description: Replaced to match published version
title: LI-RADS for hepatocellular carcinoma on gadoxetic acid-enhanced MRI: value of subtraction imaging in determining the washout and enhancing capsule features
Creators: name: Chung, Jaewon
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Abdomen
subject: Liver
subject: MR
subject: Contrast agent-intravenous
subject: Imaging sequences
subject: Cancer

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: To validate the subtraction images derived from gadoxetic acid-enhanced MRI for observation of “washout” and enhancing “capsule” in the diagnosis of hepatocellular carcinoma...
title: Prevalence and diagnostic importance of identification of coronary artery occlusion on non-ECG gated chest CT in patients with acute myocardial infarction
Creators: name: Baek, Seung Jin
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Cardiac
subject: CT
subject: Diagnostic procedure
subject: Ischaemia / Infarction

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Non-gated enhanced chest CT can be a first line imaging study in patients who present with nonspecific chest pain, shock, or dyspnea and who prove to have acute myocardial infarction (AMI). 1 The situation may particularly occur in the emergency...
title: Enhancement of Irreversible Electroporation by Selective Simultaneous Continuous Transarterial Injection of a Cell Sensitizer – An Experimental In Vivo Liver Study.
Creators: name: Pan, Feng
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Ablation procedures
subject: CT
subject: Catheter arteriography
subject: Liver
subject: Interventional vascular
subject: Cancer

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Irreversible electroporation (IRE) is a relatively new, minimally invasive, non-thermal tissue ablation technique which was established clinically during the last decade. However, the major limitation of IRE is the maximum size of the tumor to be...
title: How do we work in the infrapopliteal sector?
Creators: name: Ferrer-Puchol, María Dolores
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Interventional vascular
subject: Arteries / Aorta
subject: Vascular
subject: Catheter arteriography
subject: Arterial access
subject: Angioplasty
subject: Arteriosclerosis

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: • Know the indications for treatment in the infrapopliteal sector: Endovascular treatments are performed almost exclusively in cases of critical ischemia of the lower limbs. • Discuss the importance of the multidisciplinary team. • Describe...
The motion of the 2D hydrodynamic Chaplygin sleigh in the presence of circulation
Creators: name: Fedorov, Yuri N.
name: García-Naranjo, Luis C.
name: Vankerschaver, Joris
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37J60, 37J35, 70H45

description: We consider the motion of a planar rigid body in a potential flow with circulation and subject to a certain nonholonomic constraint. This model is related to the design of underwater vehicles. The equations of motion admit a reduction to a 2-dimensional nonlinear system, which is integrated explicitly. We show that the reduced system comprises both asymptotic and periodic dynamics separated by a critical value of the energy, and give a complete classification of types of the motion. Then we describe the whole variety of the trajectories of the body on the plane.
description: 25 pages, 7 figures. This article uses some introductory material from arXiv:1109.3210
title: Tips and Tricks in pelvic venous syndromes treatment.
Creators: name: Ferrer-Puchol, María Dolores
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Interventional vascular
subject: Pelvis
subject: Veins / Vena cava
subject: Catheter venography
subject: Percutaneous
subject: Diagnostic procedure
subject: Embolisation
subject: Varices

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Show the complexity of the pelvic venous anatomy, the hemodynamic and psychological factors involved in the pathophysiology of the pelvic venous syndromes. Recognize these disorders as the cause of chronic pelvic pain, leading to diagnosis and...
title: Magnetic resonance imaging to differentiate benign and malignant vertebral fractures. What the radiologist should know.
Creators: name: Castellanos, Jefferson
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Osteoporosis
subject: Neoplasia
subject: Metastases
subject: Diagnostic procedure
subject: MR
subject: Neuroradiology spine

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To describe the main findings of the vertebral fractures using magnetic resonance imaging (MRI). To identify the key points to characterize the vertebral fractures, in order to differentiate malignant and benign causes with conventional MRI...
À mon fils à l'aube du troisième millénaire de Gilbert Sinoué Traduction vers l'arabe suivie d'une étude linguistique et thématique.pdf
Creators: name: Mohamed Attia Ibrahim Attia Elshawadfi, Hoda
Publisher: name: figshare
Year: 2021
Subjects: subject: 200323 Translation and Interpretation Studies
subject: FOS: Languages and literature

description: Suite aux dégâts écologiques énormes causés par le naufrage du pétrolier Érika, l’écrivain francophone d’origine égyptienne, Gilbert Sinoué, a décidé d’écrire À mon fils à l'aube du troisième millénaire, à travers lequel il s'adresse à tous les habitants du Globe. En traduisant et en étudiant cette œuvre, nous espérons soutenir sa vocation universelle par élargir son public et y intégrer celui du Monde Arabe en le sensibilisant aux causes humaines majeures qui agitent l’humanité tout entière. La présente thèse comporte trois parties. La première partie est consacrée à la traduction vers l’arabe de À mon fils à l'aube du troisième millénaire, suivie de deux études linguistique et thématique dont chacune à son tour sera divisée en quatre chapitres. Le premier chapitre de l’« Étude linguistique » intitulé « Étude lexicale », s’est intéressé à commenter la traduction d’une sélection de noms propres, de termes scientifiques et de noms des espèces de plantes, d’oiseaux et d’animaux. Dans le deuxième chapitre intitulé « Étude sémantique », nous avons insisté sur l’importance de rendre dans la traduction l’ensemble des sèmes dénotatifs et connotatifs composant le sens de chaque mot. Le troisième chapitre qui a pour titre « Étude stylistique », aborde la traduction des figures de style comme révélatrices de l’esprit de l’auteur. Le quatrième chapitre intitulé « Étude syntaxique », regroupe les principes qui ont orienté la traduction des éléments de la phrase, les relations qui les réunissent et celles qui lient les propositions. Le premier chapitre de l’« Étude thématique » intitulé « La Terre, notre habitat exposé au péril », traite les conséquences prévues par Sinoué de l'intervention humaine excessive et irraisonnable dans la Nature. Le deuxième chapitre intitulé "La Féerie des savants", envisage la méfiance éprouvée par Sinoué à l'égard de certaines découvertes scientifiques, ainsi que les déviations de certaines de leurs applications. Le troisième chapitre : "Enfance torturée" est une analyse de l’image sombre mais expressive dessinée par Sinoué des malheurs que vivent les enfants pauvres dans le Monde. Le dernier chapitre : "Le Racisme", discute la définition proprement large donnée par Sinoué au racisme et sa réfutation de toute hypothèse soutenant l’existence de races supérieures. Sinoué est sûr que ses idées fleuriront un jour et participeront, même après son départ, à la création d’un monde meilleur.
title: Value of a computer-assisted detection (CAD) system designed for digital mammography (DM) in the diagnosis of breast cancer assessed by DM and digital breast tomosynthesis (DBT)
Creators: name: Aguilar Angulo, Paul
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Education and training
subject: Cancer
subject: Diagnostic procedure
subject: Computer Applications-Detection, diagnosis
subject: Mammography
subject: CAD
subject: Breast

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review the influence of a computer-assisted detection (CAD) system designed for digital mammography (DM) in the evaluation of breast cancer cases assessed by DM and digital breast tomosynthesis (DBT)...
title: To detect or not to detect, that is the question: An approach to breast cancers not visible on digital breast tomosynthesis
Creators: name: Aguilar Angulo, Paul
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Cancer
subject: Diagnostic procedure
subject: Ultrasound
subject: MR
subject: Mammography
subject: Breast

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review the image features of breast cancers not identified at Digital Breast Tomosynthesis(DBT) and digital mammography (DM) but visible in other complementary techniques (ultrasound or...
title: Evaluate the value of Four dimensional computed tomography in percutaneus aspiration lung biopsy
Creators: name: TAO, GUANGYU
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Thorax
subject: Artificial Intelligence
subject: Lung
subject: CT
subject: CAD
subject: Image manipulation / Reconstruction
subject: Biopsy
subject: Computer Applications-3D
subject: Equipment
subject: Cancer
subject: Pathology
subject: Gene therapy

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Percutaneouslungbiopsies for pulmonary masses require image guidance to avoid critical structures. And, navigation systems are promising tools in this field to facilitate the execution of the entire biopsy procedure. The purpose of this research is...
Complementarity of the constraints on New Physics from B_s -> mu+ mu- and from B -> K l+l- decays
Creators: name: Becirevic, Damir
name: Kosnik, Nejc
name: Mescia, Federico
name: Schneider, Elia
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the advantages of combining the experimental bound on Br(B_s -> mu+ mu-) and the measured Br(B -> K l+l-) to get the model independent constraints on physics beyond the Standard Model. Since the two decays give complementary information, one can study not only the absolute values of the Wilson coefficients that are zero in the Standard Model, but also their phases. To identify the sector in which the new physics might appear, information about the shapes of the transverse asymmetries in B -> K* l+l- at low q^2's can be particularly useful. We also emphasize the importance of measuring the forward-backward asymmetry in B -> K l+l- decay at large q^2's.
description: 28 pp, 12 figures, 2 tables; v3: version as published
title: An often overlooked segment in the small bowel follow through examination
Creators: name: CHEW, FATT YANG
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Education and training
subject: Barium meal
subject: Fluoroscopy
subject: Small bowel
subject: Anatomy
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Describe the general technique for the performance of the small bowel follow-through (SBFT) examination. To recognize the normal radiographic appearances of the SBFT examination. Discuss the often overlooked segment in the SBFT examination. To...
title: 2D and 3D “Shear Wave" elastonography in the evaluation of biomechanical characteristics of optic nerve and periorbital structures in patients affected by glaucoma
Creators: name: Ferrari, Donatella
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Tissue characterisation
subject: Diagnostic procedure
subject: Ultrasound
subject: Elastography
subject: Eyes

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Glaucoma is an ocular neurodegenerative disease caused by a disequilibrium between aqueous humour secretion from the ciliary body in the posterior chamber and its drainage into the anterior chamber. Intraocular pressure values ​​> 21 mmHg are...
title: Zur Erinnerung an Herrn alt Ratsherr Dr. Carl Burckhardt-Burckhardt
title: geboren den 5. Dezember 1831, gestorben den 7. Juli 1901
titleType: Subtitle
Creators: name: Miescher, E.
Publisher: name: Fr. Reinhardt
Year: 1901
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Burckhardt, Carl

description: Gelegenheitsschrift: Tod
description: Enthält: Personalien von Carl Burckhardt-Burckhardt; Ansprache gehalten in der St. Leonhards-Kirche, am 9. Juli 1901 durch Herrn Pfarrer E. Miescher.
Accelerating BTZ spacetime
Creators: name: Xu, Wei
name: Meng, Kun
name: Zhao, Liu
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An exact solution of $(2+1)$-dimensional Einstein gravity with cosmological constant is studied. The corresponding spacetime is interpreted as an accelerating BTZ spacetime. The proper acceleration, horizon structure, temperature and entropy are presented in detail. The metric being studied is very similar to the one studied by Astorino in arXiv:1101.2616, but the range of parameters is different which results in significant changes in the causal structures.
description: 15 pages. v2: minor modifications and an extra reference; v3: version to appear in CQG
title: Zur Erinnerung an unsern lieben Vater J. R. L. Burckhardt an seinem hundertjährigen Geburtstag von seinen Kindern
title: 1800 X. 17. bis 1900 X. 17.
titleType: Subtitle
Creators: name: (:Unkn) Unknown
Publisher: name: A. Stutz
Year: 1900
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Burckhardt, Johann Rudolf Lucas

description: Enthält Texte zum Elternhaus und Leben sowie Aufstellung der Nachkommenschaft von Johann Rudolf Lukas Burckhardt und den Nachruf eines Pflegesohnes (J.J.B.).
A model-theoretic interpretation of environmentally-induced superselection
Creators: name: Fields, Chris
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Environmentally-induced superselection or "einselection" has been proposed as an observer-independent mechanism by which apparently classical systems "emerge" from physical interactions between degrees of freedom described completely quantum-mechanically. It is shown that einselection can only generate classical systems if the "environment" is assumed \textit{a priori} to be classical; einselection therefore does not provide an observer-independent mechanism by which classicality can emerge from quantum dynamics. Einselection is then reformulated in terms of positive operator-valued measures (POVMs) acting on a global quantum state. It is shown that this re-formulation enables a natural interpretation of apparently-classical systems as virtual machines that requires no assumptions beyond those of classical computer science.
description: 15 pages, 1 figure; minor corrections
title: Pros and Cons of High Field Magnetic Resonance Imaging (MRI)
Creators: name: Maliakas, Vasilios
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Radiographers
subject: MR
subject: Technical aspects
subject: Education and training

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The purpose of this review is to present the advantages (high SNR, SWI, ASL) and disadvantages (Dielectric effect, Chemical Shift artifact, sequence Optimizatin) of high-field MRI, as well as ways to overcome the...
Anisotropy in BaFe2Se3 single crystals with double chains of FeSe tetrahedra
Creators: name: Lei, Hechang
name: Ryu, Hyejin
name: Frenkel, Anatoly
name: Petrovic, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We studied the anisotropy in physical properties of Ba1.00(4)Fe1.9(1)Se3.1(1) single crystals. BaFe2Se3 is a semiconductor below 300 K. Magnetization measurements show that there is a crossover from short-range antiferromagnetic (AFM) correlations at room temperature to a long-range AFM order with TN = 255 K. The anisotropy of magnetization is consistent with the previous neutron results. This crossover is supported by the heat-capacity measurement, where the phase-transition peak is absent at 255 K. The superconducting transition at about 10 K is likely due to the small amount of beta-FeSe impurities.
description: 5 pages, 6 figures
Homogenization of weakly coupled systems of Hamilton--Jacobi equations with fast switching rates
Creators: name: Mitake, Hiroyoshi
name: Tran, Hung V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B27, 35F55, 49L25

description: We consider homogenization for weakly coupled systems of Hamilton--Jacobi equations with fast switching rates. The fast switching rate terms force the solutions converge to the same limit, which is a solution of the effective equation. We discover the appearance of the initial layers, which appear naturally when we consider the systems with different initial data and analyze them rigorously. In particular, we obtain matched asymptotic solutions of the systems and rate of convergence. We also investigate properties of the effective Hamiltonian of weakly coupled systems and show some examples which do not appear in the context of single equations.
description: final version, to appear in Arch. Ration. Mech. Anal
title: Breast implants; what the radiologist needs to know.
Creators: name: ARIZA MOLINA, CARLOS
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Prostheses
subject: Diagnostic procedure
subject: Ultrasound
subject: MR
subject: Mammography
subject: Breast

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Review of the radiological findings related to the type of breast implants, method of implantation and its complications through mammography, US and MRI paying attention to the indirect signs found in asymptomatic patients that are part of screening...
title: Brownian motion in one-dimensional models: scaling, universality, and dispersionless transport
Creators: name: Kaffashnia, Amir
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: In the studies of Brownian motion, one-dimensional (1D) models play a special role in view of their relative simplicity and also because diffusion in a higher-dimensional space can often be decomposed into independent random motions in the orthogonal directions. In this thesis, we investigate the diffusion behavior of a Brownian particle (BP) within three 1D models: (i) diffusion along a stochastic harmonic oscillator chain (SHOC), (ii) diffusion of a damped BP in a tilted periodic potential, and (iii) free diffusion described by the Langevin equation with velocity-dependent damping. To address the first problem, we invent moving stochastic boundary condition approach, which allows us to simulate a small subset of oscillators in close proximity to the BP, effectively capturing the relevant dynamics. Our investigations have revealed a power law relation between the diffusion coefficient D and temperature T and the existence of dispersionless undamped phases in the BP motion at high temperatures. In the context of the second model, we explore the phenomenon of dispersionless transport of a BP in a tilted periodic potential, which is described in the literature as a broad time interval during which the particle’s dispersion appears to be constant. Our findings demonstrate that the dispersion fluctuations within the dispersion plateau hinder accurate determination of D, but these challenges can be remedied by employing an alternative measurement procedure. Moreover, it is evident that the conventional Langevin equation with velocity-independent damping coefficient as used in model (ii) cannot reproduce the nearly undamped ballistic flights observed in various physical systems. Lastly, we focus on establishing an analytical relation between D and T for a BP subject to velocity-dependent damping γ(v) and apply it to the case of a monotonically decreasing function γ(v) > 0. We show that at low temperatures, the D vs. T relation is linear; however, at high temperatures, a non-Einsteinian behavior emerges, similar to the one found within the SHOC diffusion model.
Relativistic polytropic spheres embedded in a chameleon scalar field
Creators: name: Folomeev, Vladimir
name: Singleton, Douglas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we investigate gravitationally bound, spherically symmetric equilibrium configurations consisting of ordinary (polytropic) matter nonminimally coupled to an external chameleon scalar field. We show that this system has static, regular, asymptotically flat general relativistic solutions. The properties of these spherical configurations, such as total mass, distribution of matter, and size, depend strongly on the surrounding scalar field. The mass is found in terms of the parameter $σ$, which is proportional to the central mass density of the ordinary matter. We perform a stability analysis of these spherical solutions and find an upper bound for $σ$ where dynamical instability occurs.
description: 16 pages, 4 figures; minor corrections to content, version published in PRD
Riemann Zeroes and Phase Transitions via the Spectral Operator on Fractal Strings
Creators: name: Herichi, Hafedh
name: Lapidus, Michel L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The spectral operator was introduced by M. L. Lapidus and M. van Frankenhuijsen [La-vF3] in their reinterpretation of the earlier work of M. L. Lapidus and H. Maier [LaMa2] on inverse spectral problems and the Riemann hypothesis. In essence, it is a map that sends the geometry of a fractal string onto its spectrum. In this survey paper, we present the rigorous functional analytic framework given by the authors in [HerLa1] and within which to study the spectral operator. Furthermore, we also give a necessary and sufficient condition for the invertibility of the spectral operator (in the critical strip) and therefore obtain a new spectral and operator-theoretic reformulation of the Riemann hypothesis. More specifically, we show that the spectral operator is invertible (or equivalently, that zero does not belong to its spectrum) if and only if the Riemann zeta function zeta(s) does not have any zeroes on the vertical line Re(s)=c. Hence, it is not invertible in the mid-fractal case when c=1/2, and it is invertible everywhere else (i.e., for all c in(0,1) with c not equal to 1/2) if and only if the Riemann hypothesis is true. We also show the existence of four types of (mathematical) phase transitions occurring for the spectral operator at the critical fractal dimension c=1/2 and c=1 concerning the shape of the spectrum, its boundedness, its invertibility as well as its quasi-invertibility.
title: Pediatric chest pathology
Creators: name: GUERMAZI, HAIFA
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Arteriovenous malformations
subject: Diagnostic procedure
subject: Ultrasound
subject: CT
subject: Thorax
subject: Paediatric
subject: Lung
subject: Atelectasis
subject: Chronic obstructive airways disease

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The thorax is the most common region to undergo imaging evaluation in children.Acute chest disorders can have three origins: lungs, mediastinum and chest wall. They include pulmonary infection, infarction, trauma, congenital malformations and acute...
Can decaying modes save void models for acceleration?
Creators: name: Zibin, James P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The unexpected dimness of Type Ia supernovae (SNe), apparently due to accelerated expansion driven by some form of dark energy or modified gravity, has led to attempts to explain the observations using only general relativity with baryonic and cold dark matter, but by dropping the standard assumption of homogeneity on Hubble scales. In particular, the SN data can be explained if we live near the centre of a Hubble-scale void. However, such void models have been shown to be inconsistent with various observations, assuming the void consists of a pure growing mode. Here it is shown that models with significant decaying mode contribution today can be ruled out on the basis of the expected cosmic microwave background spectral distortion. This essentially closes one of the very few remaining loopholes in attempts to rule out void models, and strengthens the evidence for Hubble-scale homogeneity.
description: 11 pages, 3 figures; discussion expanded, appendix added; version accepted to Phys. Rev. D
Integrated sedimentology and organic geochemistry of world-class source rocks in the Black Sea
Creators: name: Morton, Michael T.
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: The Eocene Kuma Formation and Oligocene - Miocene Maikop Group are marine mudstones and source rock components of Black Sea petroleum systems. The Kuma Formation was deposited in the Peri-Tethys realm a the northern margin of the Tethys Ocean whilst the Maikop Group was deposited later in the younger Paratethys, a partially disconnected seaway further isolated during Arabia-Eurasia collision and Greater Caucasus uplift, and by Oligocene regression. The Maikop Group has been extensively studied for its source rock potential with fewer studies conducted on the Kuma Formation. While there are published geochemical data on these rocks, there are no studies to date that have analysed their sedimentological facies, processes or depositional environment, and their link with organic carbon burial. This thesis presents the first detailed sedimentological study of the Kuma Formation and Maikop Group by; 1) identifying and interpreting microlithofacies through thin section petrography; 2) conducting organic geochemical analysis of the Kuma Formation to produce the first dual data set for source rock characterisation; and, 3) undertaking strontium isotope analysis to determine basin connectivity. The investigation into the Kuma Formation and Maikop Group sedimentology reveals a wide variety of sedimentary processes in a dynamic depositional environment that verifies interpretations in previous studies and offers novel insights into the marginal marine setting of the Paratethys during the Early Cenozoic. Both intervals are summarised to be of good source rock quality with the Kuma Formation in particular demonstrating a variety of sedimentological facies that all contain preserved organic material and have good hydrocarbon potential. This thesis illustrates the wealth of understanding that can be gained from studying mudstones at the microscale and offers insights into the relationship between depositional history and environments, and source rock production. Indeed, source rocks can be deposited under a variety of conditions and not uniformly stratified and anoxic.
title: Initial CT findings in solid organ transplant patients with invasive pulmonary aspergillosis and their prognostic value on 1 year survival
Creators: name: Nguyen, Alexandre
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Transplantation
subject: Outcomes
subject: Infection
subject: Diagnostic procedure
subject: CT
subject: Lung

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Invasive pulmonary aspergillosis (IPA) is the most common manifestation of invasive aspergillosis (IA), an invasive mold disease which is a rare complication in solid organ transplant (SOT) patients(1). Morbi-mortality is high in IPA(1-4), which is...
title: Sesamoid and accessory bones in foot and ankle involved in chronic pain syndromes
Creators: name: Stratulat, Iuliana
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Inflammation
subject: Education and training
subject: Normal variants
subject: Education
subject: MR
subject: Digital radiography
subject: CT
subject: Musculoskeletal system
subject: Musculoskeletal bone
subject: Bones

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review the sesamoid and accessory bones in foot and ankle which are most commonly involved in pain syndromes and to describe the imaging characteristics of those...
Isomorphism versus commensurability for a class of finitely presented groups
Creators: name: Arzhantseva, Goulnara
name: Lafont, Jean-Francois
name: Minasyan, Ashot
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 20F10 (Primary) 20F69, 03D40, 20F65 (Secondary)

description: We construct a class of finitely presented groups where the isomorphism problem is solvable but the commensurability problem is unsolvable. Conversely, we construct a class of finitely presented groups within which the commensurability problem is solvable but the isomorphism problem is unsolvable. These are first examples of such a contrastive complexity behaviour with respect to the isomorphism problem.
description: v. 2: 15 pages, a new section (5) has been added
title: Osteoid Osteoma: Different locations, same treatment
Creators: name: Mendez, Patricio
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Bones
subject: Interventional non-vascular
subject: CT
subject: Percutaneous
subject: Ablation procedures
subject: Cancer

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Present our experience with CT guided percutaneous radiofrequency ablation in patients with osteoid osteoma; assessing technical and clinical success and related...
Flux Tube Model Signals for Baryon Correlations in Heavy Ion Collisions
Creators: name: Patel, Apoorva
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The flux tube model offers a pictorial description of what happens during the deconfinement phase transition in QCD. The 3-point vertices of a flux tube network lead to formation of baryons upon hadronisation. Therefore, correlations in the baryon number distribution at the last scattering surface are related to the preceding pattern of the flux tube vertices, and provide a signature of the nearby deconfinement phase transition. I discuss the nature of the expected signal, which should be observable in heavy ion collisions at RHIC and LHC.
description: LaTeX, 9 pages, 5 figures, (v2) Several arguments expanded for clarity, (v3) Minor typesetting changes, published version
Quantum phase-slips in Josephson junction rings
Creators: name: Rastelli, G.
name: Pop, I. M.
name: Hekking, F. W. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study quantum phase-slip (QPS) processes in a superconducting ring containing N Josephson junctions and threaded by an external static magnetic flux. In a such system, a QPS consists of a quantum tunneling event connecting two distinct classical states of the phases with different persistent currents [K. A. Matveev et al., Phys. Rev. Lett. 89, 096802 (2002)]. When the Josephson coupling energy EJ of the junctions is larger than the charging energy EC = e2/2C where C is the junction capacitance, the quantum amplitude for the QPS process is exponentially small in the ratio EJ/EC. At given magnetic flux each QPS can be described as the tunneling of the phase difference of a single junction of almost 2pi, accompanied by a small harmonic displacement of the phase difference of the other N-1 junctions. As a consequence the total QPS amplitude nu is a global property of the ring. Here we study the dependence of nu on the ring size N taking into account the effect of a finite capacitance C0 to ground which leads to the appearance of low-frequency dispersive modes. Josephson and charging effects compete and lead to a nonmonotonic dependence of the ring critical current on N. For N=infty, the system converges either towards a superconducting or an insulating state, depending on the ratio between the charging energy E0 = e2/2C0 and the Josephson coupling energy EJ.
description: (19 pages, 12 figures) The final version deviated from the original version. One of the author was removed from the list
A search for pre-substellar cores and proto-brown dwarf candidates in Taurus: multiwavelength analysis in the B213-L1495 clouds
Creators: name: Palau, Aina
name: de Gregorio-Monsalvo, I.
name: Morata, Ò.
name: Stamatellos, D.
name: Huélamo, N.
name: Eiroa, C.
name: Bayo, A.
name: Morales-Calderón, M.
name: Bouy, H.
name: Ribas, Á.
name: Asmus, D.
name: Barrado, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In an attempt to study whether the formation of brown dwarfs (BDs) takes place as a scaled-down version of low-mass stars, we conducted IRAM30m/MAMBO-II observations at 1.2 mm in a sample of 12 proto-BD candidates selected from Spitzer/IRAC data in the B213-L1495 clouds in Taurus. Subsequent observations with the CSO at 350 micron, VLA at 3.6 and 6 cm, and IRAM30m/EMIR in the 12CO(1-0), 13CO(1-0), and N2H+(1-0) transitions were carried out toward the two most promising Spitzer/IRAC source(s), J042118 and J041757. J042118 is associated with a compact (<10 arcsec or <1400 AU) and faint source at 350 micron, while J041757 is associated with a partially resolved (~16 arcsec or ~2000 AU) and stronger source emitting at centimetre wavelengths with a flat spectral index. The corresponding masses of the dust condensations are ~1 and ~5 Mjup for J042118 and J041757, respectively. In addition, about 40 arcsec to the northeast of J041757 we detect a strong and extended submillimetre source, J041757-NE, which is not associated with NIR/FIR emission down to our detection limits, but is clearly detected in 13CO and N2H+ at ~7 km/s, and for which we estimated a total mass of ~100 Mjup, close to the mass required to be gravitationally bound. In summary, our observational strategy has allowed us to find in B213-L1495 two proto-BD candidates and one pre-substellar core candidate, whose properties seem to be consistent with a scaled-down version of low-mass stars.
description: MNRAS, 424, 2778; corrected typos, mass estimate refined in Section 3.2.1 and Section 5.3; conclusions unchanged
title: Pediatric lymphatic malformations: the same pattern in different sites
Creators: name: Gomes, Andressa
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Cysts
subject: Congenital
subject: Diagnostic procedure
subject: CT
subject: MR
subject: Ultrasound
subject: Paediatric

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review lymphatic malformations epidemiology, pathophysiology and treatment; To discuss the main findings in different imaging modalities, including ultrasound, CT and MRI; Demonstrate that the image pattern is characteristic regardless of the...
Solar-cycle variation of sound speed near the solar surface
Creators: name: Rabello-Soares, M. Cristina
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present evidence that the sound-speed variation with solar activity has a two-layer configuration, similar to the one observed below an active region, which consists of a negative layer near the solar surface and a positive one in the layer immediately below the first one. Frequency differences between the activity minimum and maximum of solar cycle 23, obtained applying global helioseismology to the Michelson Doppler Imager (MDI) on board SOHO, is used to determine the sound-speed variation from below the base of the convection zone to a few Mm below the solar surface. We find that the sound speed at solar maximum is smaller than at solar minimum at the limit of our determination (5.5 Mm). The min-to-max difference decreases in absolute values until ~7 Mm. At larger depths, the sound speed at solar maximum is larger than at solar minimum and their difference increases with depth until ~10 Mm. At this depth, the relative difference is less than half of the value observed at the lowest depth determination. At deeper layers, it slowly decreases with depth until there is no difference between maximum and minimum activity.
description: Accepted for publication in ApJ; corrected typos