cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Clamped and sideband-resolved silicon optomechanical crystals
Creators: name: Kolvik, Johan
name: Burger, Paul
name: Frey, Joey
name: Van Laer, Raphaël
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optomechanical crystals (OMCs) are a promising and versatile platform for transduction between mechanical and optical fields. However, the release from the substrate used in conventional suspended OMCs also prevents heat-carrying noise phonons from rapidly leaking away. Thermal anchoring may be improved by attaching the OMCs directly to the substrate. Previous work towards such clamped, i.e. non-suspended, OMCs suffers from weak interaction rates and insufficient lifetimes. Here, we present a new class of clamped OMCs realizing -- for the first time -- optomechanical interactions in the resolved-sideband regime required for quantum transduction. Our approach leverages high-wavevector mechanical modes outside the continuum. We observe a record zero-point optomechanical coupling rate of $g_0/(2π) \approx 0.50$ MHz along with a sevenfold improvement in the single-photon cooperativity of clamped OMCs. Our devices operate at frequencies commonly used in superconducting qubits. This opens a new avenue using clamped OMCs in both classical and quantum communications, sensing, and computation through scalable mechanical circuitry that couples strongly to light.
description: 7 pages, 6 figures; Johan Kolvik, and Paul Burger contributed equally to this work
High-resolution Br-gamma spectro-interferometry of the transitional Herbig Ae/Be star HD 100546: a Keplerian gaseous disc inside the inner rim
Creators: name: Mendigutía, I.
name: de Wit, W. J.
name: Oudmaijer, R. D.
name: Fairlamb, J. R.
name: Carciofi, A. C.
name: Ilee, J. D.
name: Vieira, R. G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present spatially and spectrally resolved Br-gamma emission around the planet-hosting, transitional Herbig Ae/Be star HD 100546. Aiming to gain insight into the physical origin of the line in possible relation to accretion processes, we carried out Br-gamma spectro-interferometry using AMBER/VLTI from three different baselines achieving spatial and spectral resolutions of 2-4 mas and 12000. The Br-gamma visibility is larger than that of the continuum for all baselines. Differential phases reveal a shift between the photocentre of the Br-gamma line -displaced 0.6 mas (0.06 au at 100 pc) NE from the star- and that of the K-band continuum emission -displaced 0.3 mas NE from the star. The photocentres of the redshifted and blueshifted components of the Br-gamma line are located NW and SE from the photocentre of the peak line emission, respectively. Moreover, the photocentre of the fastest velocity bins within the spectral line tends to be closer to that of the peak emission than the photocentre of the slowest velocity bins. Our results are consistent with a Br-gamma emitting region inside the dust inner rim (<0.25 au) and extending very close to the central star, with a Keplerian, disc-like structure rotating counter-clockwise, and most probably flared (25 deg). Even though the main contribution to the Br-gamma line does not come from gas magnetically channelled on to the star, accretion on to HD 100546 could be magnetospheric, implying a mass accretion rate of a few 10^-7 Msun/yr. This value indicates that the observed gas has to be replenished on time-scales of a few months to years, perhaps by planet-induced flows from the outer to the inner disc as has been reported for similar systems.
description: 5 Figures. Accepted in MNRAS
title: Does mammographic tumour appearance relate to breast density and clinically established histopathological prognostic factors?
Creators: name: Sartor, Hanna
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Screening
subject: Diagnostic procedure
subject: Mammography
subject: Breast
subject: Cancer
subject: Epidemiology

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The radiographic appearance of the breast varies among women due to differences in tissue composition and the attenuation of fat, stroma and epithelium on x–rays. Fat is radiographically radiolucent and appears dark on a mammogram. Stroma and...
Studies of systematic limitations in the EDM searches at storage rings
Creators: name: Saleev, Artem
name: Nikolaev, Nikolai
name: Rathmann, Frank
Publisher: name: arXiv
Year: 2015
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Searches of the electric dipole moment (EDM) at a pure magnetic ring, like COSY, encounter strong background coming from magnetic dipole moment (MDM). The most troubling issue is the MDM spin rotation in the so-called imperfection, radial and longitudinal, B-fields. To study the systematic effects of the imperfection fields at COSY we proposed the original method which makes use of the two static solenoids acting as artificial imperfections. Perturbation of the spin tune caused by the spin kicks in the solenoids probes the systematic effect of cumulative spin rotation in the imperfection fields all over the ring. The spin tune is one of the most precise quantities measured presently at COSY at $10^{-10}$ level. The method has been successfully tested in September 2014 run at COSY, unravelling strength of spin kicks in the ring's imperfection fields at the level of $10^{-3} rad$.
description: Submitted to the proceedings of SPIN-2014 (Beijing, China, 20-24 October 2014). To be published in "International Journal of Modern Physics: Conference Series"
Discrete-time Semiclassical Szegedy Quantum Walks
Creators: name: Ortega, Sergio A.
name: Martin-Delgado, Miguel A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum walks are promising tools based on classical random walks, with plenty of applications such as many variants of optimization. Here we introduce the semiclassical walks in discrete time, which are algorithms that combines classical and quantum dynamics. Specifically, a semiclassical walk can be understood as a classical walk where the transition matrix encodes the quantum evolution. We have applied this algorithm to Szegedy's quantum walk, which can be applied to any arbitrary weighted graph. We first have solved the problem analytically on regular 1D cycles to show the performance of the semiclassical walks. Next, we have simulated our algorithm in a general inhomogeneous symmetric graph, finding that the inhomogeneity drives a symmetry breaking on the graph. Moreover, we show that this phenomenon is useful for the problem of ranking nodes in symmetric graphs, where the classical PageRank fails. We have demonstrated experimentally that the semiclassical walks can be applied on real quantum computers using the platform IBM Quantum.
description: RevTex 4.2, 16 pages, 11 color figures
Swift J1357.2-0933: a massive black hole in the Galactic thick disc
Creators: name: Sánchez, Daniel Mata
name: Munoz-Darias, Teo
name: Casares, Jorge
name: Corral-Santana, Jesús
name: Shahbaz, Tariq
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Swift J1357.2-0933 is one of the shortest orbital period black hole X-ray transients (BHTs). It exhibited deep optical dips together with an extremely broad H$α$ line during outburst. We present 10.4-m GTC time-resolved spectroscopy during quiescence searching for donor star absorption features. The large contribution of the accretion flow to the total luminosity prevents the direct detection of the companion. Nevertheless, we constrain the non-stellar contribution to be larger than $\sim 80\%$ of the total optical light, which sets new lower limits to the distance ($d > 2.29\, \rm{kpc}$) and the height over the Galactic plane ($z>1.75\, \rm{kpc}$). This places the system in the galactic thick disc. We measure a modulation in the centroid of the H$α$ line with a period of $P=0.11\pm0.04\, \rm{d}$ which, combined with the recently presented FWHM-$K_2$ correlation, results in a massive black hole ($M_1>9.3 \, \rm{M_\odot}$) and a $\sim$ M2V companion star ($M_2\sim 0.4\, \rm{M_\odot}$). We also present further evidence supporting a very high orbital inclination ($i\gtrsim 80^\circ$).
description: 6 pages, 4 figures
title: Ultrasound of the major salivary glands: anatomy and pathology
Creators: name: Samper Wamba, Jose Daniel
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Pathology
subject: Education
subject: Ultrasound
subject: Salivary glands

description: Learning objectives Background Imaging findings OR Procedure details Conclusion References Personal Information
description: Learning objectives: - To study the US imaging of the major salivary glands. - To review most frequent pathology in these structures. - To emphasize the role of US in their initial...
The XMM deep survey in the CDF-S. IX. An X-ray outflow in a luminous obscured quasar at z~1.6
Creators: name: Vignali, C.
name: Iwasawa, K.
name: Comastri, A.
name: Gilli, R.
name: Lanzuisi, G.
name: Ranalli, P.
name: Cappelluti, N.
name: Mainieri, V.
name: Georgantopoulos, I.
name: Carrera, F. J.
name: Fritz, J.
name: Brusa, M.
name: Brandt, W. N.
name: Bauer, F. E.
name: Fiore, F.
name: Tombesi, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In active galactic nuclei (AGN)-galaxy co-evolution models, AGN winds and outflows are often invoked to explain why super-massive black holes and galaxies stop growing efficiently at a certain phase of their lives. They are commonly referred to as the leading actors of feedback processes. Evidence of ultra-fast (v>0.05c) outflows in the innermost regions of AGN has been collected in the past decade by sensitive X-ray observations for sizable samples of AGN, mostly at low redshift. Here we present ultra-deep XMM-Newton and Chandra spectral data of an obscured (Nh~2x10^{23} cm^-2), intrinsically luminous (L2-10keV~4x10^{44} erg/s) quasar (named PID352) at z~1.6 (derived from the X-ray spectral analysis) in the Chandra Deep Field-South. The source is characterized by an iron emission and absorption line complex at observed energies of E~2-3 keV. While the emission line is interpreted as being due to neutral iron (consistent with the presence of cold absorption), the absorption feature is due to highly ionized iron transitions (FeXXV, FeXXVI) with an outflowing velocity of 0.14^{+0.02}_{-0.06}c, as derived from photoionization models. The mass outflow rate - ~2 Msun/yr - is similar to the source accretion rate, and the derived mechanical energy rate is ~9.5x10^{44} erg/s, corresponding to 9% of the source bolometric luminosity. PID352 represents one of the few cases where indications of X-ray outflowing gas have been observed at high redshift thus far. This wind is powerful enough to provide feedback on the host galaxy.
description: 11 pages, 7 figures, 1 table, A&A, in press
title: Comparative Study of two different densitometric techniques to evaluate the hand bone mineral density in an early arthritis register.
Creators: name: Castaño Palacios, Diana Maria
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Musculoskeletal bone
subject: Absorptiometry / Bone densitometry
subject: Digital radiography
subject: Comparative studies
subject: Demineralisation-Bone
subject: Arthritides

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The evaluation of cortical bone mass of metacarpal bones by radiogrametry (DXR) has proved an easy technique and could have a predictive value in the evaluation of severity in patients with early arthritis (EA) [1-4]. However, this tool is not...
Mental Health in First Generation University Students: A Scoping Review Protocol
Creators: name: Smith, Donna
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Educational Psychology
subject: Student Counseling and Personnel Services
subject: Education
subject: Higher Education
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: First generation students; mental health

description: Registration of a Scoping Review Protocol
Advance Care Planning interventions for older people in outpatient settings. A scoping review. (Registration)
Creators: name: Kirchner, Aenne
name: Enger, Stephanie
name: Langner, Henriette
name: Luderer, Christiane
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: ACP
subject: Advance Care Planning
subject: Advance directives
subject: aged
subject: death and dying
subject: end of life
subject: frail
subject: intervention
subject: old
subject: programme
subject: talk

description: The aim of the study is to identify, map and summarise publications reporting advance care planning interventions or programmes for older people in community-dwelling or outpatient settings.
title: How far can we reduce the iodine load at CT pulmonary angiography using dual-energy : a prospective study on 40 patients.
Creators: name: Labani, Aissam
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Embolism / Thrombosis
subject: Technology assessment
subject: Experimental investigations
subject: Contrast agent-intravenous
subject: CT-Angiography
subject: CT
subject: Pulmonary vessels
subject: Lung
subject: Contrast agents

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: The main objective of this study is to reduce the total Iodine load in CT pulmonary angiography (CTPA), thanks toDual-Energy Computed Tomography (DECT). DECT is based on a simultaneous acquisition at low and high kilovoltage (usually 80 and...
A 1.3% distance to M33 from HST Cepheid photometry
Creators: name: Breuval, Louise
name: Riess, Adam G.
name: Macri, Lucas M.
name: Li, Siyang
name: Yuan, Wenlong
name: Casertano, Stefano
name: Konchady, Tarini
name: Trahin, Boris
name: Durbin, Meredith J.
name: Williams, Benjamin F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a low-dispersion period-luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry from the PHATTER survey. Using high-quality ground-based light curves, we recover Cepheid phases and amplitudes for multi-epoch HST data and we perform template fitting to derive intensity-averaged mean magnitudes. HST observations in the SH0ES near-infrared Wesenheit system significantly reduce the effect of crowding relative to ground-based data, as seen in the final PL scatter of $σ$ = 0.11 mag. We adopt the absolute calibration of the PL based on HST observations in the Large Magellanic Cloud (LMC) and a distance derived using late-type detached eclipsing binaries to obtain a distance modulus for M33 of $μ$ = 24.622 $\pm$ 0.030 mag (d = 840 $\pm$ 11 kpc), a best-to-date precision of 1.3%. We find very good agreement with past Cepheid-based measurements. Several TRGB estimates bracket our result while disagreeing with each other. Finally, we show that the flux contribution from star clusters hosting Cepheids in M33 does not impact the distance measurement and we find only 3.7% of the sample is located in (or nearby) young clusters. M33 offers one of the best sites for the cross-calibration of many primary distance indicators. Thus, a precise independent geometric determination of its distance would provide a valuable new anchor to measure the Hubble constant.
description: Submitted to ApJ, comments welcome
Local Radiation Hydrodynamic Simulations of Massive Star Envelopes at the Iron Opacity Peak
Creators: name: Jiang, Yan-Fei
name: Cantiello, Matteo
name: Bildsten, Lars
name: Quataert, Eliot
name: Blaes, Omer
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We perform three dimensional radiation hydrodynamic simulations of the structure and dynamics of radiation dominated envelopes of massive stars at the location of the iron opacity peak. One dimensional hydrostatic calculations predict an unstable density inversion at this location, whereas our simulations reveal a complex interplay of convective and radiative transport whose behavior depends on the ratio of the photon diffusion time to the dynamical time. The latter is set by the ratio of the optical depth per pressure scale height, $τ_0$, to $τ_c=c/c_g$, where $c_g \approx$ 50 km/s is the isothermal sound speed in the gas alone. When $τ_0 \gg τ_c$, convection reduces the radiation acceleration and removes the density inversion. The turbulent energy transport in the simulations agrees with mixing length theory and provides its first numerical calibration in the radiation dominated regime. When $τ_0 \ll τ_c$, convection becomes inefficient and the turbulent energy transport is negligible. The turbulent velocities exceed $c_g$, driving shocks and large density fluctuations that allow photons to preferentially diffuse out through low-density regions. However, the effective radiation acceleration is still larger than the gravitational acceleration so that the time average density profile contains a modest density inversion. In addition, the simulated envelope undergoes large-scale oscillations with periods of a few hours. The turbulent velocity field may affect the broadening of spectral lines and therefore stellar rotation measurements in massive stars, while the time variable outer atmosphere could lead to variations in their mass loss and stellar radius.
description: 20 pages, 21 figures. submitted to ApJ
Supplementary document for Full-field x-ray fluorescence imaging using a Fresnel zone plate coded aperture - 6174670.pdf
Creators: name: Soltau, Jakob
name: Meyer, Paul
name: Hartmann, Robert
name: Strueder, Lothar
name: Soltau, Heike
name: Salditt, Tim
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Additional Experimental Information
title: Coronary CTA in Pediatric Cardiac Transplants
Creators: name: Moelker, Adriaan
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Cardiovascular system
subject: Paediatric
subject: Cardiac
subject: CT-Angiography
subject: Catheter arteriography
subject: Diagnostic procedure
subject: Transplantation

description: Learning objectives Background Imaging findings OR Procedure details Conclusion References Personal Information
description: Learning objectives: This poster provides the reader with an overview of the imaging techniques, imaging findings and radiation considerations of coronary artery CT angiography (CCTA) in pediatric heart transplant recipients. Comparisons between CCTA with conventional...
title: Congenital anomalies of the kidney and urinary tract (CAKUT). How to proceed for diagnosis?
Creators: name: Mnari, Walid
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Kidney
subject: Urinary Tract / Bladder
subject: Paediatric
subject: Ultrasound-Colour Doppler
subject: Conventional radiography
subject: CT
subject: Contrast agent-intravenous
subject: Cystography / Uretrography
subject: Congenital
subject: Dilatation

description: Learning objectives Background Imaging findings OR Procedure details Conclusion References Personal Information
description: Learning objectives: Congenital abnormalities of the kidney and urinary tract (CAKUT) occur 1 of 500 newborns CAKUT predispose to the development of hypertension, cardiovascular disease and end-stage renal failure Quick management++ Learning objectives : To...
LAND-USE CHANGE AND TIDAL CREEK SEDIMENTATION IN COASTAL WATERSHEDS OF NORTH CAROLINA
Creators: name: Deaton, Charles
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Terrestrial landscape alterations cause changes along the coast, where rivers deliver sediments to estuaries and oceans. In contrast to major rivers, tidal creek watersheds are small, but they are numerous and drain much of the eastern United States’ coastal-estuarine land area. Coastal watersheds are frequently hotspots of development, and in North Carolina, residents have expressed concerns about creeks infilling, becoming unnavigable for boaters and uninhabitable for fish. To understand the relationship between land-use change and creek infilling, sedimentation rates calculated from 210Pb in cores from twelve tidal creeks across North Carolina were compared to changes in watershed land use 1959-2010. Results indicate that land-use change, particularly increasing non-agricultural development, has the potential to drive infilling of tidal creeks, although hydrological conditions impose some limits and are responsible for the partitioning of increased sediment loads between deposition in creeks and export to larger estuaries.
Scaling functions of the three-dimensional $Z(2)$, $O(2)$ and $O(4)$ models and their finite size dependence in an external field
Creators: name: Karsch, Frithjof
name: Neumann, Marius
name: Sarkar, Mugdha
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze scaling functions in the $3$-$d$, $Z(2)$, $O(2)$ and $O(4)$ universality classes and their finite size dependence using Monte Carlo simulations of improved $ϕ^4$ models. Results for the scaling functions are fitted to the Widom-Griffiths form, using a parametrization also used in analytic calculations. We find good agreement on the level of scaling functions and the location of maxima in the universal part of susceptibilities. We also find that an earlier parametrization of the $O(4)$ scaling function, using 14 parameters, is well reproduced when using the Widom-Griffiths form with only three parameters. We furthermore show that finite size corrections to the scaling functions are distinctively different in the $Z(2)$ and $O(N)$ universality classes and determine the volume dependence of the peak locations in order parameter and mixed susceptibilities.
description: 15 pages, 8 figures, accepted version
title: 'Working With Vulnerable Children" : Listening to the Views of Service Providers Working With Street Children
Creators: name: Havva Bademci, Özden
Publisher: name: University of Kent
Year: 2023

description: Introduction: As in other developing countries with metropolises, ‘street children’ have constituted one of the most important problems in Turkey, particularly in Istanbul, over the last two decades. The General Directorate of Social Services and Child Protection Agency (hereafter SHÇEK), is the state agency responsible for street children and their protection. The main focus of the study has been to explore the nature and organisation of state welfare service provision for street children in Istanbul and to develop conceptual framework, which describes, illuminates and conceptualises the state welfare service provision for street children in Istanbul from its service providers’ point of view. Methodology: Critically prepared grounding through the literature survey and preliminary field projects have provided the guidelines for the selection of methods and approaches which have yielded meaningful and reliable results in the hitherto uninvestigated aspects of the fields of service provision for street children in Turkey. The qualitative methodology like the ‘Narrative Interview’ method has been utilised to collect data on the services for street children. Results: The approach taken in research participation with the service providers ranging from senior management through the frontline workers down to the support staff employed by the SHÇEK organisations has been richly rewarded by data amassed on the modus operandi and the shortcomings of these organisations not only supporting the reported results of similar research globally but also providing useful explanation for the apparent perpetuation of the street children problems of Istanbul. Conclusion: The most important result of the research is the demonstration that service provision cannot be assessed without the direct investigation of service providers because the service providers themselves determine the scope and the quality of the service provision. The research has proven that SHÇEK reproduces its marginalisation in the society, consequently of its employees which adversely promotes remarginalisation of the service users.
title: Imaging Spectrum of Simple and Complicated Hydatid Disease
Creators: name: Nicolescu, Ana
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Abdomen
subject: Lung
subject: Neuroradiology brain
subject: CT
subject: Ultrasound
subject: MR
subject: Complications
subject: Contrast agent-intravenous
subject: Localisation
subject: Infection
subject: Parasites
subject: Cysts

description: Learning objectives Background Imaging findings OR Procedure details Conclusion References Personal Information
description: Learning objectives: To asses the imaging features of simple and complicated hydatid disease in different anatomic locations. To illustrate an imaging guide of the hydatid cyst in correlation with the development course of the...
title: Fluoroscopic screening times and patient doses for venous access device insertion: correlation with operator experience
Creators: name: Salati, Umer
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Interventional vascular
subject: Interventional non-vascular
subject: Breast
subject: Fluoroscopy
subject: Venous access
subject: Prostheses

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: To assess screening fluoroscopy times in the insertion of venous access devices and correlate them with the level of experience of the...
title: SECURE study: observational post-marketing study on the safety of meglumine gadoterate (Gd-DOTA) - interim analysis on 24 961 patients
Creators: name: Gallego, Jose
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Contrast agents
subject: MR
subject: Contrast agent-intravenous

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Objectives To know incidence of nephrogenic systemic fibrosis (NSF) as part of a 3 month follow-up after injection of gadoterate meglumine in patients with renal insufficiency. Provide international database of 40,000 patients (adults/children) on...
The universal Teukolsky equations and black hole perturbations in higher-derivative gravity
Creators: name: Cano, Pablo A.
name: Fransen, Kwinten
name: Hertog, Thomas
name: Maenaut, Simon
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reduce the study of perturbations of rotating black holes in higher-derivative extensions of general relativity to a system of decoupled radial equations that stem from a set of universal Teukolsky equations. We detail a complete computational strategy to obtain these decoupled equations in general higher-derivative theories. We apply this to six-derivative gravity to compute the shifts in the quasinormal mode frequencies with respect to those of Kerr black holes in general relativity. At linear order in the angular momentum we reproduce earlier results obtained with a metric perturbation approach. In contrast with this earlier work, however, the method given here applies also to post-merger black holes with significant spin, which are of particular observational interest.
description: 50 pages, 5 figures. v3: version published in PRD
Fabrication of a Definitive CAD/CAD Titanium Abutment Prior to Guided Surgery: A Pilot Study
Creators: name: Scruggs, William
Publisher: name: University of North Carolina at Chapel Hill Graduate School
Year: 2015
Subjects: subject: Dentistry
subject: FOS: Clinical medicine

description: Purpose: The purpose of this prospective comparative study is to determine the possibility of designing a CAD/CAM patient specific abutment that reproducibly predicts the clinical relationship of the abutment/crown interface with the peri-implant mucosal margin. Materials and Methods: Seventeen patients were allocated to 2 groups of subgingival abutment margin depths: 1.5mm and 0.5mm. A surgical guide, custom abutment and provisional crown were fabricated prior to surgery. Implants were placed in 16 participants using a guided surgery protocol. Results: Five of the sixteen abutments had abutment margin exposure at abutment delivery. Four of the five abutment margin exposures occurred at molar sites. Ten out of sixteen provisional crowns fit with zero adjustment. Conclusions: The results of this pilot study suggest that the digital workflow of producing a definitive titanium abutment and milled provisional crown prior to guided surgery is initially successful. Abutment Margin Exposure is more likely in molar sites.
Developments in Stochastic Coupled Cluster Theory: The initiator approximation and application to the Uniform Electron Gas
Creators: name: Spencer, James S.
name: Thom, Alex J. W.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We describe further details of the Stochastic Coupled Cluster method and a diagnostic of such calculations, the shoulder height, akin to the plateau found in Full Configuration Interaction Quantum Monte Carlo. We describe an initiator modification to Stochastic Coupled Cluster Theory and show that initiator calculations can be extrapolated to the unbiased limit. We apply this method to the 3D 14-electron uniform electron gas and present complete basis set limit values of the CCSD and previously unattainable CCSDT correlation energies for up to rs = 2, showing a requirement to include triple excitations to accurately calculate energies at high densities.
description: 14 pages, 12 figures
The influence of alcohol-specific communication on adolescent alcohol use and alcohol-related consequences
Creators: name: Reimuller, Alison Nicolette
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Alcohol-specific communication is conceptualized as a direct conversation between an adult and a child regarding alcohol use and during these conversations, the adult relays messages to the child about alcohol. The current study examined the construct of alcohol-specific communication and the effect of messages on adolescent alcohol use and alcohol-related consequences. Parent-child dyads were assessed biannually for 3 years (grades 9-11 at wave 6) to examine these relations in a large longitudinal study of adolescents initially in grades 6 through 8. An exploratory factor analysis identified two factors among alcohol-specific communication items, permissive messages and negative alcohol messages. Results showed that permissive messages predicted higher frequency of future alcohol use. However, previous level of adolescent alcohol use moderated the permissive message- alcohol use/alcohol consequences relation. Results suggest that parental messages regarding alcohol use may impact adolescent alcohol use beyond the effect of general parenting style and parental alcohol use.
title: A 2 year comparative study between sonographic findings of malignant and benign breast masses evaluated with colour and spectral Doppler ultrasound in Seyedo shohada hospital,Esfahan,Iran
Creators: name: Sirous, Reza
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Cancer
subject: Comparative studies
subject: Ultrasound-Spectral Doppler
subject: Ultrasound-Colour Doppler
subject: Ultrasound
subject: Breast

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Breast cancer , as the most common cancer in the women’s population, is the second mortality cause of cancer in this group, and the most important mortality factor among women aged 45-55 years 1 . Based on American Cancer Association, about...
title: Magnetic resonance imaging (MRI) and image analysis of post - radiation changes in patients with bone metastases
Creators: name: Romanos, Odyssefs
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Metastases
subject: Radiation effects
subject: Computer Applications-Detection, diagnosis
subject: MR
subject: Oncology
subject: Musculoskeletal system
subject: Computer applications

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Aim of the present study was the evaluation of post-radiation lesions with MRI and image analysis, in patients with bone metastases undergoing radiation therapy. The skeletal system is the 3 rd commonest site for localization of metastasis, after...
Preregistration Hate Feelings and Populist Attitudes
Creators: name: Martínez, Cristhian
name: van Prooijen, Jan-Willem
name: van Lange, Paul
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social Psychology
subject: Political Science
subject: FOS: Political science
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Hate
subject: Negative Emotions
subject: Polarization
subject: Political extremism
subject: Political ideology
subject: Populism

description: This is the preregistration of the project Hate Feelings and Populist Attitudes.
title: Radiation dose to the interventional radiology staff, especially nurses
Creators: name: Chida, Koichi
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Dosimetric comparison
subject: Radiation safety
subject: Physics
subject: Catheters
subject: Fluoroscopy
subject: Catheter arteriography
subject: Radioprotection / Radiation dose
subject: Radiation physics
subject: Interventional vascular

description: Learning objectives Background Imaging findings OR Procedure details Conclusion References Personal Information
description: Learning objectives: To show the current occupational radiation dose to interventional radiology (IR) staff (physicians, nurses, and technologists). To understand the importance of radiation protection for IR staff. To demonstrate the need for using two badges to...
Generic deformation channels for critical Fermi surfaces in the collisionless regime
Creators: name: Islam, Kazi Ranjibul
name: Mandal, Ipsita
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using a quantum Boltzmann equation framework, we analyse the nature of generic low-energy deformations of a critical Fermi surface, which exists at the non-Fermi liquid fixed point of a system consisting of fermions interacting with massless bosons. The non-Fermi liquid behaviour arises due to the itinerant quasiparticles of the Fermi surface interacting strongly with the massless bosons, which on the other hand undergo Landau damping as a result of the mutual interactions. Focussing on the collisionless regime, where we neglect the collision integral, we chalk out the possible excitations spanning the entire spectrum of angular momentum ($\ell$) channels (i.e., including both small and large values of $\ell$). The excitations are of two types: particle-hole like localized excitations forming an energy band (or continuum) and delocalized collective modes with discrete energies. Although we find a collective mode analogous to the zero sound of a Fermi liquid, its dispersion shows a crossover from a $Ω\sim |\mathbf q|^{6/5}$ behaviour to the usual $ Ω\sim |\mathbf q|$ dependence, where $Ω$ and $\mathbf q$ represent the frequency and momentum, respectively. We estimate the frequency scale at which this crossover takes place. We also determine the boundary for the particle-hole continuum in the $Ω$--$\mathbf q$ plane, and observe a crossover from $Ω\sim |\mathbf q|^{3/2}$ to $ Ω\sim |\mathbf q|$ behaviour, determined by another crossover frequency scale.
description: follow up paper of arXiv:2108.09480; journal version
Femtoscopy with identified charged pions in proton-lead collisions at $\sqrt{{s}_{NN}} = 5.02$ TeV with ATLAS
Creators: name: ATLAS Collaboration
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2017

description: Bose-Einstein correlations between identified charged pions are measured for $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV using data recorded by the ATLAS detector at the LHC corresponding to a total integrated luminosity of $28$ $\mathrm{nb}^{-1}$. Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum ($k_{\mathrm{T}}$) and rapidity ($y^{\star}_{\pi\pi}$) of the pair. Pairs are selected with a rapidity $-2 < y^{\star}_{\pi\pi} < 1$ and with an average transverse momentum $0.1 < k_{\mathrm{T}} < 0.8$ GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair $k_{\mathrm{T}}$. A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross-term $R_\mathrm{ol}$ is measured as a function of rapidity, and a nonzero value is observed with $5.1\sigma$ combined significance for $-1 < y^{\star}_{\pi\pi} < 1$ in the most central events.
Assessment of Air Quality Model Predictions of Ozone Concentrations Characterized by Large Hourly Changes in Houston, Texas
Creators: name: Olatosi, Adeola O.
Publisher: name: University of North Carolina at Chapel Hill
Year: 2011

description: The Houston-Galveston-Brazoria (HGB) area has been shown to be affected by two types of ozone formation. The 'typical' ozone formation, common in most parts of Houston and other urban areas, depicted by a gradual rise in hourly ozone concentration. The other type of ozone formation is depicted by a rapid rise in ozone formation defined as either [greater than or equal to] 40 ppb/hr or [greater than or equal to] 60 ppb/2hr change in hourly ozone concentration. These rapid ozone formation or 'non- typical ozone formation' (NTOC) have been shown to affect attainment metric by as much as 10 ppb. We have evaluated the regulatory Air Quality Model's (AQM) ability to accurately simulate the observed rapid ozone formation peculiar to this region using the two major emission inventories and have compared it with observations from days that corresponded with the modeling period. Results show that the model lacks the ability to predict observed maximum one hour and two hour changes.
Measurement of differential cross-sections of a single top quark produced in association with a $W$ boson at $\sqrt{s}=13$ TeV with ATLAS
Creators: name: ATLAS Collaboration
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2017

description: The differential cross-section for the production of a $W$ boson in association with a top quark is measured for several particle-level observables. The measurements are performed using 36.1 fb$^{-1}$ of $pp$ collision data collected with the ATLAS detector at the LHC in 2015 and 2016. Differential cross-sections are measured in a fiducial phase space defined by the presence of two charged leptons and exactly one jet matched to a $b$-hadron, and are normalised with the fiducial cross-section. Results are found to be in good agreement with predictions from several Monte Carlo event generators.
Evaluating the effectiveness of Parent-Mediated Interventions for children diagnosed with ASD aged 0-12 years in low and lower-middle income countries from 2012-2019: A Mini-Systematic Review
Creators: name: Neeson, Clodagh
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: This mini systematic review aims to: 1. To systematically review the literature to evaluate parent-mediated interventions for children diagnosed with ASD aged 0-12 years in lower-middle and low-income countries as defined by the World Banks 2021. 2. To review the literature in relation to existing parent-mediated interventions and the impact of these interventions on reducing various aspects of ASD. 3. To identify any gaps in the existing evidence base and offer recommendations which may assist future research and practice.
Magnetic excitations from an S=1/2 diamond-shaped tetramer compound Cu2PO4OH
Creators: name: Matsuda, M.
name: Dissanayake, S. E.
name: Abernathy, D. L.
name: Totsuka, K.
name: Belik, A. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Inelastic neutron scattering experiments have been carried out on a powder sample of Cu2PO4OH, which consists of diamond-shaped tetramer spin units with S=1/2. We have observed two nearly dispersionless magnetic excitations at E1~12 and E2~20 meV, whose energy width are broader than the instrumental resolution. The simplest square tetramer model with one dominant interaction, which predicts two sharp excitation peaks at E1 and E2(=2E1), does not explain the experimental result. We found that two diagonal intratetramer interactions compete with the main interaction and weak intertetramer interactions connect the tetramers. The main intratetramer interaction is found to split into two inequivalent ones due to a structural distortion below 160 K. Cu2PO4OH is considered to be a good material to study the S=1/2 Heisenberg tetramer system.
description: 6 pages, 6 figures
Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb$^{-1}$ of $\sqrt{s}=13$ TeV pp collision data with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2017

description: The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of $\sqrt{s}=13$ TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb$^{-1}$. A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.
title: MR-guided biopsies at only MR-visible breast lesions at 1.5 vs. 3T-MRI
Creators: name: Malich, Ansgar
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: Breast
subject: Interventional non-vascular
subject: Oncology
subject: MR
subject: CAD
subject: Image manipulation / Reconstruction
subject: Biopsy
subject: Diagnostic procedure
subject: Outcomes analysis
subject: Neoplasia
subject: Tissue characterisation
subject: Epidemiology

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Even among radiologists the usefulness of MR-guided breast biopsy is critically discussed. Major arguments against this interventional procedure are, that there is no need for this biopsy, all suspicious lesions can be detected sonografically if...
KSGNS construction for $τ$-maps on S-modules and $\mathfrak{K}$-families
Creators: name: Dey, Santanu
name: Trivedi, Harsh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 46E22, 46L05, 46L08, 47B50, 81T05

description: We introduce S-modules, generalizing the notion of Krein $C^*$-modules, where a fixed unitary replaces the symmetry of Krein $C^*$-modules. The representation theory on S-modules is explored and for a given $*$-automorphism $α$ on a $C^*$-algebra the KSGNS construction for $α$-completely positive maps is proved. An extention of this theorem for $τ$-maps is also achieved, when $τ$ is an $α$-completely positive map, along with a decomposition theorem for $\mathfrak K$-families.
description: 17 pages
title: Does The Presence Of Femoroacetabular Impingement Morphotype Lead To Early Osteoarthritis? Comparison Of Non-Osteoarthritic Hips Of Young And Old Individuals
Creators: name: Omoumi, Patrick
Publisher: name: European Congress of Radiology
Year: 2013
Subjects: subject: CT
subject: Musculoskeletal joint
subject: Computer Applications-3D
subject: Dysplasias
subject: Epidemiology

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Femoroacetabular impingement (FAI) has recently been described in the literature as a cause of labrochondral damage, which in turn could predispose to early hip osteoarthritis (OA) . Surgery is considered by many as the treatment of choice to...