cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Galactic runaway O and Be stars found using Gaia DR3
Creators: name: Carretero-Castrillo, M.
name: Ribó, M.
name: Paredes, J. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A relevant fraction of massive stars are runaway stars. These stars move with a significant peculiar velocity with respect to their environment. We aim to discover and characterize the population of massive and early-type runaway stars in the GOSC and BeSS catalogs using Gaia DR3 astrometric data. We present a 2-dimensional method in the velocity space to discover runaway stars as those that deviate significantly from the velocity distribution of field stars, which are considered to follow the Galactic rotation curve. We found 106 O runaway stars, 42 of which were not previously identified as runaways. We found 69 Be runaway stars, 47 of which were not previously identified as runaways. The dispersion of runaway stars is a few times higher in Z and b than that of field stars. This is explained by the ejections they underwent when they became runaways. The percentage of runaways is 25.4% for O-type stars, and it is 5.2% for Be-type stars. In addition, we conducted simulations in 3 dimensions for our catalogs. They revealed that these percentages could increase to ~30% and ~6.7%, respectively. Our runaway stars include seven X-ray binaries and one gamma-ray binary. Moreover, we obtain velocity dispersions of ~5 km/s perpendicular to the Galactic plane for O- and Be-type field stars. These values increase in the Galactic plane to ~7 km/s for O-type stars due to uncertainties and to ~9 km/s for Be-type stars due to Galactic velocity diffusion. The excellent Gaia DR3 astrometric data have allowed us to identify a significant number of O-type and Be-type runaways in the GOSC and BeSS catalogs. The higher percentages and higher velocities found for O-type compared to Be-type runaways underline that the dynamical ejection scenario is more likely than the binary supernova scenario. Our results open the door to identifying new high-energy systems among our runaways by conducting detailed studies.
description: 20 pages, 20 figures. Accepted for publication in A&A
Digging the New York City Skyline: Soil Fungal Communities in Green Roofs and City Parks
Creators: name: McGuire, Krista Lynn
name: Payne, Sara Grace
name: Palmer, Matthew I.
name: Gillikin, Caitlyn Marie
name: Keefe, Dominique Russenberger
name: Kim, Su Jin
name: Gedallovich, Seren Michelle
name: Discenza, Julia Marie
name: Rangamannar, Ramya
name: Koshner, Jennifer Anne
name: Massmann, Audrey L.
name: Orazi, Giulia
name: Essene, Adam Lang
name: Leff, Jonathan W.
name: Fierer, Noah
Publisher: name: Columbia University
Year: 2013
Subjects: Soil fungi--Ecology
Green roofs (Gardening)
Botany
Environmental sciences
Sustainability

description: In urban environments, green roofs provide a number of benefits, including decreased urban heat island effects and reduced energy costs for buildings. However, little research has been done on the non-plant biota associated with green roofs, which likely affect their functionality. For the current study, we evaluated whether or not green roofs planted with two native plant communities in New York City functioned as habitats for soil fungal communities, and compared fungal communities in green roof growing media to soil microbial composition in five city parks, including Central Park and the High Line. Ten replicate roofs were sampled one year after planting; three of these roofs were more intensively sampled and compared to nearby city parks. Using Illumina sequencing of the fungal ITS region we found that green roofs supported a diverse fungal community, with numerous taxa belonging to fungal groups capable of surviving in disturbed and polluted habitats. Across roofs, there was significant biogeographical clustering of fungal communities, indicating that community assembly of roof microbes across the greater New York City area is locally variable. Green roof fungal communities were compositionally distinct from city parks and only 54% of the green roof taxa were also found in the park soils. Phospholipid fatty acid analysis revealed that park soils had greater microbial biomass and higher bacterial to fungal ratios than green roof substrates. City park soils were also more enriched with heavy metals, had lower pH, and lower quantities of total bases (Ca, K, and Mg) compared to green roof substrates. While fungal communities were compositionally distinct across green roofs, they did not differentiate by plant community. Together, these results suggest that fungi living in the growing medium of green roofs may be an underestimated component of these biotic systems functioning to support some of the valued ecological services of green roofs.
title: Antifaschismus. Begriff, Geschichte und Forschungsfeld in westeuropäischer Perspektive
Creators: name: Späth, Jens
Publisher: name: ZZF - Centre for Contemporary History
Year: 2019

description: Der Beitrag gibt einen Überblick über die Begriffsgeschichte des Antifaschismus und das dazugehörige Forschungsfeld. Ziel der Ausführungen ist es, einige Entwicklungen der internationalen Literatur und Potenziale des „transnational turn“ in Bezug auf das Thema herauszuarbeiten. Räumlich konzentriert sich der Beitrag auf die historischen Ursprungsländer Italien und Deutschland. Zugleich öffnen europäische und globale Seitenblicke vergleichende und beziehungsgeschichtliche Perspektiven.
title: Micturating cystourethrography, the role of the radiologist in stress incontinence and urethral stenosis.
Creators: name: SOLIS CANO, DANIA
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Education and training
subject: Cystography / Uretrography
subject: Fluoroscopy
subject: Urinary Tract / Bladder
subject: Anatomy
subject: Genitourinary

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To review the literature of urethral stricture and effort or stress incontinence. To know the top differential diagnosis and the most common etiology in urethral stricture. To know the types of incontinence and how to make the corresponding...
Improvement of response bandwidth and sensitivity of Rydberg Receiver using multi-channel excitations
Creators: name: Hu, Jinlian
name: Jiao, Yuechun
name: He, Yunhui
name: Zhang, Hao
name: Zhang, Linjie
name: Zhao, Jianming
name: Jia, Suotang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We investigate the response bandwidth of a superheterodyne Rydberg receiver at a room-temperature vapor cell, and present an architecture of multi-channel lasers excitation to increase the response bandwidth and keep sensitivity, simultaneously. Two microwave fields, denoted as a local oscillator (LO) $E_{LO}$ and a signal field $E_{Sig}$, couple two Rydberg states transition of $|52D_{5/2}\rangle\to |53P_{3/2}\rangle$. In the presence of the LO field, the frequency difference between two fields can be read out as an intermediate frequency (IF) signal using Rydberg electromagnetically induced transparency (EIT) spectroscopy. The bandwidth of the Rydberg receiver is obtained by measuring the output power of IF signal versus the frequency difference between two fields. The bandwidth dependence on the Rabi frequency of excitation lasers is presented, which shows the bandwidth decrease with the probe Rabi frequency, while it is quadratic dependence on the coupling Rabi frequency. Meanwhile, we investigate the effect of probe laser waist on the bandwidth, showing that the bandwidth is inversely proportional to the laser waist. We achieve a maximum response bandwidth of the receiver about 6.8~MHz. Finally, we design an architecture of multi-channel lasers excitation for increasing the response and keeping the sensitivity, simultaneously. Our work has the potential to extend the applications of Rydberg atoms in communications.
Conditions for efficient charge generation preceded by energy transfer process in non-fullerene organic solar cells
Creators: name: Benatto, L.
name: Moraes, C. A. M.
name: Candiotto, G.
name: Sousa, K. R. A.
name: Souza, J. P. A.
name: Roman, L. S.
name: Koehler, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The minimum driving force strategy is applied to promote the exciton dissociation in organic solar cells (OSCs) without significant loss of open-circuit voltage. However, this strategy tends to promote Förster resonance energy transfer (FRET) from the donor to the acceptor (D-A), a consequence generally ignored until recently. In spite of the advances reported on this topic, the correlation between charge-transfer (CT) state binding energy and driving force remains unclear, especially in the presence of D-A FRET. To address this question, we employ a kinetic approach to model the charge separation in ten different D/A blends using non-fullerene acceptors. The model considers the influence of FRET on photoluminescence (PL) quenching efficiency. It successfully predicts the measured PL quenching efficiency for D or A photoexcitation in those blends, including the ones for which the D-A FRET process is relevant. Furthermore, the application of the model allows to quantifying the fractions of quenching loss associated with charge transfer and energy transfer. Fundamental relationships that controls the exciton dissociation was derived evidencing the key roles played by the Marcus inverted regime, exciton lifetime and mainly by the correlation between the driving force and binding energy of CT state. Based on those findings, we propose some strategies to maximize the quenching efficiency and minimize energy loss of OSCs in the presence of D-A FRET.
description: 44 pages, 10 figures, 3 tables
Sub-GeV dark matter as pseudo-Goldstone from the seesaw scale
Creators: name: Frigerio, Michele
name: Hambye, Thomas
name: Masso, Eduard
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Pseudo Nambu-Goldstone bosons (pNGBs) are naturally light spin-zero particles, which can be interesting dark matter (DM) candidates. We study the phenomenology of a pNGB theta associated with an approximate symmetry of the neutrino seesaw sector. A small coupling of theta to the Higgs boson is induced radiatively by the neutrino Yukawa couplings. By virtue of this Higgs portal interaction (i) the pNGB acquires a mass m_theta proportional to the electroweak scale, and (ii) the observed DM relic density can be generated by the freeze-in of theta-particles with mass m_theta ~ 3 MeV. Alternatively, the coupling of theta to heavy sterile neutrinos can account for the DM relic density, in the 1 keV-3 MeV window. The decays of theta into light fermions are suppressed by the seesaw scale, making such pNGB sufficiently stable to play the role of DM.
description: 30 pages, 4 figures, version to appear in Phys. Rev. X (Fig. 2 slightly modified, references added)
title: The effect of the table height on the patient dose and image noise when making a CT-abdomen with automatic exposure control.
Creators: name: Huisman, Jannigje
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Experimental
subject: Not applicable
subject: Education and training
subject: Technical aspects
subject: CT
subject: Radioprotection / Radiation dose
subject: Radiographers
subject: Abdomen
subject: CT

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To describe the effect size of the CT scanner table height on patient dose and image noise To makeradiographers aware ofthe effect size of the CT scanner table height on patient dose and image...
title: conventional imaging of Osteopetrosis and its complications
Creators: name: Kassim, AlShaymaa
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Image registration
subject: Imaging sequences
subject: MR
subject: Digital radiography
subject: CT
subject: Head and neck
subject: Bones
subject: Paediatric
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: discuss the underlying pathology Illustrate theclinical features of the disease Identify the different radiological features of osteopetrosis diagnostic checklist for the...
Organizational Structure, Determinants of Promotion, and Gender Differences in Attainment
Creators: name: Spilerman, Seymour
name: Petersen, Trond
Publisher: name: Columbia University
Year: 1999
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Labor economics

description: In this paper, we differentiate between merit and vacancy driven promotion regimes. In the former, a vacancy at a higher level is not necessary for promotion; in the latter, a job opening is required. Using work histories from a large insurance company we investigate the implications for individual attainment from exposure to each of the advancement systems. We also examine how organizational structures differentially generate the two kinds of advancement regimes. Vacancy-based moves represent discontinuities in an otherwise orderly career progression; they become relevant when an employee reaches the ceiling grade of a job ladder or wishes to change work location.We conclude by examining the ability of this formulation of promotion regimes to account for the lower rates of attainment by women, relative to men, in large corporate settings.
title: Patterns of intracranial bleed and their significance
Creators: name: NEUPANE, NIRMAL PRASAD
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Multicentre study
subject: Observational
subject: Retrospective
subject: Haemorrhage
subject: Blood
subject: Acute
subject: Removal
subject: Drainage
subject: Complications
subject: MR
subject: CT-Angiography
subject: CT
subject: Trauma
subject: Emergency
subject: CNS
subject: Emergency Imaging

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To learn about the various causes of intracranial hemorrhage. To know about different locations of intracranial bleed and their significance. To learn about the complications associated with the intracranial...
title: Imaging of Breast Male Mastitis
Creators: name: Souissi, Ala
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Diagnostic or prognostic study
subject: Not applicable
subject: Infection
subject: Cancer
subject: Abscess
subject: Puncture
subject: Biopsy
subject: Abscess delineation
subject: Ultrasound
subject: Mammography
subject: Breast

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Provide readers with a thorough review of the ultrasound and mammographic aspects of the different etiologies of mastitis in males. Describe the mammographic and ultrasound features of male breast...
title: PI-RADS Version 2.1: A Pictorial Review with Radiopathologic Correlation using a 3T MRI
Creators: name: Torres-Ayala, Stephanie
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Cancer
subject: Staging
subject: Education
subject: MR
subject: Genital / Reproductive system male
subject: Genitourinary

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: -Discuss prostate MRI protocol with advantages and pitfalls. -Discuss PI-RADS objectives, version 2.1 changes, and assessment categories. -Review prostate anatomy. -Provide examples and radiopathologic correlation of prostate lesions with associated...
title: Contribution of direct CT venography in the diagnosis of central veno-occlusive disease in hemodialysis patients.
Creators: name: Remenyi, Erika
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Embolism / Thrombosis
subject: Diagnostic procedure
subject: CT-High Resolution
subject: CT-Angiography
subject: CT
subject: Veins / Vena cava
subject: Vascular
subject: Thorax
subject: Vascular

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To illustrate theradiological findings ofcentralveno-occlusive disease withdirect CT venography (CTV). To emphasize the importance and contribution ofdirect CTV in the diagnosis of central veno-occlusive disease in hemodialysis...
Richard Dickinson Chambers 1935 – 2019 - Publications and Patents from Richard Dickinson Chambers. 16 March 1935 — 18 April 2019
Creators: name: Sandford, Graham
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences

description: Richard (Dick) Chambers was one of the most creative and distinguished organofluorine chemists of his generation. He synthesized a range of perfluorinated heteroaromatic systems, including pentafluoropyridine and tetrafluoropyrimidine, by halogen exchange processes, and established their chemistry and associated reaction mechanisms. Notably, ‘mirror image’ negative Friedel–Crafts reactions led to perfluoroalkyl heteroaromatic derivatives that could be transformed into unusual valence bond isomers by irradiation. New ranges of stable, observable perfluorinated carbanions, alkenes and dienes were synthesized and their fundamental chemistry established. Dick was an excellent experimental scientist whose career was marked by his unique skill-set in being able to perform reactions at high pressure under vacuum, using γ-ray irradiation, photochemistry, continuous flow processes and a variety of fluorinating reagents. His research into the use of elemental fluorine gas, which established the key role of solvent in reaction control, established fluorine as a viable reagent for organic synthesis. Several of his new synthetic processes, including syntheses of perfluorocarbon iodides, highly fluorinated heteroaromatic derivatives and α-fluoro-β-ketoester systems, were adopted for scale-up by industry. But Dick was more than a talented and innovative scientist. He was also an outgoing and fun-loving man, who always made time to offer support, guidance and advice to all his colleagues, research group members and scores of scientific friends within the fluorine science community around the world. As a result, he forged strong personal bonds throughout his life and a legacy that has lasted through generations of chemists.
A Near-infrared Variability Survey of Young Planetary-mass Objects
Creators: name: Liu, Pengyu
name: Biller, Beth A.
name: Vos, Johanna M.
name: Whiteford, Niall
name: Zhang, Zhoujian
name: Liu, Michael C.
name: Fontanive, Clemence
name: Manjavacas, Elena
name: Henning, Thomas
name: Kenworthy, Matthew A.
name: Bonavita, Mariangela
name: Bonnefoy, Mickael
name: Bubb, Emma
name: Petrus, Simon
name: Schlieder, Joshua
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a photometric variability survey of young planetary-mass objects using the New Technology Telescope in the Js and Ks bands. Surface gravity plays an important role in the atmospheric structure of brown dwarfs, as young low gravity L dwarfs have a higher variability rate than field L dwarfs. In this study, we extend variability studies to young T-type planetary-mass objects and investigate the effects of surface gravity on the variability of L and T dwarfs across a large sample. We conduct continuous monitoring for 18 objects with spectral types from L5 to T8 and detect four new variables and two variable candidates. Combining with previous variability surveys of field and young L and T objects, we find that young objects tend to be more variable than field objects within peak-to-peak variability amplitude ranges of 0.5-10 per cent and period ranges of 1.5-20 hr. For the first time, we constrain the variability rate of young T dwarfs to be 56 per cent compared to 25 per cent for field T dwarfs. Both field and young samples have higher variability rates at the L/T transition than outside the L/T transition. The differences in the variability rates between field and young samples are about 1 sigma and therefore larger sample sizes are needed to confirm and refine the results. Besides the L/T transition, young L dwarfs with strong variability tend to assemble in a narrow spectral type range of L6-L7.5. This work supports the critical role of surface gravity on the atmospheric structure from L to T spectral types.
description: Accepted for publication in MNRAS, 21 pages of main text including 6 tables and 17 figures
Statistical analysis of the mass-to-flux ratio in turbulent cores: effects of magnetic field reversals and dynamo amplification
Creators: name: Bertram, Erik
name: Federrath, Christoph
name: Banerjee, Robi
name: Klessen, Ralf S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We study the mass-to-flux ratio (M/Φ) of clumps and cores in simulations of supersonic, magnetohydrodynamical turbulence for different initial magnetic field strengths. We investigate whether the (M/Φ)-ratio of core and envelope, R = (M/Φ)_{core}/(M/Φ)_{envelope} can be used to distinguish between theories of ambipolar diffusion and turbulence-regulated star formation. We analyse R for different Lines-of-Sight (LoS) in various sub-cubes of our simulation box. We find that, 1) the average and median values of |R| for different times and initial magnetic field strengths are typically greater, but close to unity, 2) the average and median values of |R| saturate at average values of |R| ~ 1 for smaller magnetic fields, 3) values of |R| < 1 for small magnetic fields in the envelope are caused by field reversals when turbulence twists the field lines such that field components in different directions average out. Finally, we propose two mechanisms for generating values |R| ~< 1 for the weak and strong magnetic field limit in the context of a turbulent model. First, in the weak field limit, the small-scale turbulent dynamo leads to a significantly increased flux in the core and we find |R| ~< 1. Second, in the strong field limit, field reversals in the envelope also lead to values |R| ~< 1. These reversals are less likely to occur in the core region where the velocity field is more coherent and the internal velocity dispersion is typically subsonic.
description: 12 pages, 8 figures, accepted for publication in MNRAS
Domestic Distortions, Imperfect Information, and the Brain Drain
Creators: name: Bhagwati, Jagdish N.
name: Hamada, Koichi
Publisher: name: Columbia University
Year: 1975
Subjects: Economics

description: An earlier paper by Bhagwati and Hamada (1974) presented a theoretical analysis of the brain drain in the context of wage rigidity and unemployment. This paper extends the analysis by modifying the model to incorporate the phenomena of overqualification, internal diffusion of labor from urban to rural areas and imperfect information about the quality of labor. The welfare effect of the brain drain in the presence of these phenomena is analyzed.
Pseudapis ampla
Creators: name: Madl, Michael
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Pseudapis
Pseudapis ampla

description: Pseudapis ampla (W ALKER, 1871)
Nomia ampla n.sp.: WALKER 1871a: 44 (descr. ♀, Tadjoura).
Nomia ampla WALKER, 1871: DE DALLA TORRE 1896: 163 (world cat. (Djibouti, not Egypt). Osmia ampla (WALKER, 1871): INNES BEY 1911: 105 (Tadjoura, cat. Lord Collection).
Nomia ampla WALKER, 1871: WARNCKE 1976: 114 (type lost, not in BMNH).
Nomia ampla WALKER, 1871: PAULY 1990: 171 (tax., type not in BMNH).
Pseudapis ampla (WALKER, 1871): BAKER 2002: 22 (tax., Tadjoura).
Nomia ampla WALKER, 1871: EARDLEY & URBAN 2010: 78 (tax., cat. Afr. reg.).
D i s t r i b u t i o n: Tadjoura.
Pseudapis ampla, which is only known from Djibouti, is not mentioned in FRIESE (1909a). In the taxonomy I am following BAKER (2002). This paper is not cited in EARDLEY & URBAN (2010).
description: Published as part of Madl, Michael, 2018, A preliminary catalogue of the Hymenoptera (Insecta) of the Republic of Djibouti, pp. 907-967 in Linzer biologische Beiträge 50 (2) on page 937, DOI: 10.5281/zenodo.3776452
CLARITY climate service concept and mockups
Creators: name: Havlik, Denis
Publisher: name: Zenodo
Year: 2018
Subjects: CLARITY, climate services, climate change adaptation, concept

description: "CLARITY climate service concept" was presented on the joint CLARITY/Climate Fit workshop that was organised as a side-event of the "European Week of Regions and Cities", on October 9-th and 10-th 2018, in Brussels.

Interactive CSIS mockups illustrates the "screening" part of the CSIS service, where users can discover the main hazards at the project location, baseline exposure for the key elements at risk, vulnerabilities and understand the risk profile of their projects.
description: Interactive mockup does not work in the preview mode. Download the file, open it in acrobat reader and press Ctrl-L to switch to full screen mode.
title: Role of cardiac magnetic resonance in assessment of atrial septal defect.
Creators: name: Ibrahim, Mary
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Congenital
subject: Technical aspects
subject: Imaging sequences
subject: MR
subject: Cardiovascular system
subject: Cardiac
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Tounderstand the embryology of the inter-atrial septum and different Atrial septal defects (ASD). To understand the hemodynamics of atrial septal defect (ASD). To know the role of MRI as a non invasive technique for quantification of shunt either...
EVLA Observations of the Radio Evolution of SN 2011dh
Creators: name: Krauss, M. I.
name: Soderberg, A. M.
name: Chomiuk, L.
name: Zauderer, B. A.
name: Brunthaler, A.
name: Bietenholz, M. F.
name: Chevalier, R. A.
name: Fransson, C.
name: Rupen, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on Expanded Very Large Array (EVLA) observations of the Type IIb supernova 2011dh, performed over the first 100 days of its evolution and spanning 1-40 GHz in frequency. The radio emission is well-described by the self-similar propagation of a spherical shockwave, generated as the supernova ejecta interact with the local circumstellar environment. Modeling this emission with a standard synchrotron self-absorption (SSA) model gives an average expansion velocity of v \approx 0.1c, supporting the classification of the progenitor as a compact star (R_* \approx 10^11 cm). We find that the circumstellar density is consistent with a ρ \propto r^-2 profile. We determine that the progenitor shed mass at a constant rate of \approx 3 \times 10^-5 M_\odot / yr, assuming a wind velocity of 1000 km / s (values appropriate for a Wolf-Rayet star), or \approx 7 \times 10^-7 M_\odot / yr assuming 20 km / s (appropriate for a yellow supergiant [YSG] star). Both values of the mass-loss rate assume a converted fraction of kinetic to magnetic energy density of ε_B = 0.1. Although optical imaging shows the presence of a YSG, the rapid optical evolution and fast expansion argue that the progenitor is a more compact star - perhaps a companion to the YSG. Furthermore, the excellent agreement of the radio properties of SN 2011dh with the SSA model implies that any YSG companion is likely in a wide, non-interacting orbit.
description: 6 pages, 2 figures; accepted to ApJL
Absolute-rate coefficient for C3+(2s→2p) electron-impact excitation
Creators: name: Savin, Daniel Wolf
name: Gardner, L. D.
name: Reisenfeld, D. B.
name: Young, A. R.
name: Kohl, J. L.
Publisher: name: Columbia University
Year: 1995
Subjects: Astrophysics
Microphysics

description: We have measured the absolute-rate coefficient for electron-impact excitation (EIE) of C3+(2s 2S1/2→2p 2P1/2,3/2) for energies near threshold. A delayed coincidence technique with inclined beams was used. Radiation from the excited ions was detected using an optical system that subtends slightly over π steradians. At an ion-rest-frame energy of 10.10 eV the measured rate coefficient was (7.79±2.10)×10-8 cm3 s-1 and the measured cross section was (4.15±1.12)×10-16 cm2. The uncertainties quoted here represent the total experimental uncertainty, statistical and systematic, at a confidence level considered to be equivalent to a statistical 90% confidence level. Good agreement is found with other measurements. Agreement is not good with Coulomb-Born with exchange and two-state close-coupling calculations, both of which fall outside our 90% confidence limits. Nine-state close-coupling calculations are in better agreement. However, the calculations lie at the extreme edge of our uncertainty limits. Taking into account previous measurements of EIE in C3+ and also a measurement of EIE in Li-like Be+ that falls significantly below theory at threshold, there is a suggestion that the C3+(2s→2p) EIE rate coefficient near threshold may fall slightly below presently accepted values.
JWST uncovers helium and water abundance variations in the bulge globular cluster NGC 6440
Creators: name: Cadelano, Mario
name: Pallanca, Cristina
name: Dalessandro, Emanuele
name: Salaris, Maurizio
name: Mucciarelli, Alessio
name: Leanza, Silvia
name: Ferraro, Francesco R.
name: Lanzoni, Barbara
name: Chen, Rosie H.
name: Freire, Paulo C. C.
name: Heinke, Craig
name: Ransom, Scott M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We used ultra-deep observations obtained with the NIRCam aboard the James Webb Space Telescope to explore the stellar population of NGC 6440: a typical massive, obscured and contaminated globular cluster formed and orbiting within the Galactic bulge. Leveraging the exceptional capabilities of this camera, we sampled the cluster down to ~5 magnitudes below the main-sequence turn-off in the (mF115W , mF115W - mF200W ) colour-magnitude diagram. After carefully accounting for differential extinction and contamination by field interlopers, we find that the main sequence splits into two branches both above and below the characteristic knee. By comparing the morphology of the colour-magnitude diagram with a suitable set of isochrones, we argue that the upper main-sequence bi-modality is likely due to the presence of a He-enriched stellar population with a helium spread of DeltaY = 0.04. The lower main-sequence bi-modality can be attributed to variations in the abundance of water (i.e., oxygen) with Delta[O/Fe] ~ -0.4. This is the first evidence of both helium and oxygen abundance variations in a globular cluster purely based on JWST observations. These results open the window for future in-depth investigations of the multiple population phenomenon in clusters located in the Galactic bulge, which were previously unfeasible with near-UV observations, due to prohibitive reddening and crowding conditions.
description: Accepted for publication in A&A
Vibration Control of Tall Buildings Using Mega Sub-Configuration
Creators: name: Feng, Maria Q.
name: Mita, Akira
Publisher: name: Columbia University
Year: 1995
Subjects: subject: Civil engineering
subject: FOS: Civil engineering
subject: Mechanical engineering
subject: FOS: Mechanical engineering

description: An innovative vibration-control system is proposed to reduce the dynamic response of tall buildings to wind and seismic loads. This system takes advantage of the so-called megasubstructure configuration, which is especially popular in tall buildings. Substructures contained in the megastructure serve as energy absorbers so that no additional mass is required for the intended vibration control as seen in the conventional mass damper systems. The proposed system naturally resolves the difficulties in augmenting damping capacities of tall buildings associated with the high rigidity and deformation in the dominant bending mode. Dynamic characteristics of the proposed control system including the frequency response and the energy flow are investigated. Optimal values of structural parameters such as the damping ratio and stiffness of the substructure are determined. The feasibility and effectiveness of this unique control system in improving human comfort and protecting structures under both wind and earthquake loads are demonstrated through analytical and numerical analysis.
Orbit injection of planet-crossing asteroids
Creators: name: Namouni, Fathi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Solar system Centaurs originate in transneptunian space from where planet orbit crossing events inject their orbits inside the giant planets' domain. Here, we examine this injection process in the three-body problem by studying the orbital evolution of transneptunian asteroids located at Neptune's collision singularity as a function of the Tisserand invariant, T. Two injection modes are found, one for T>0.1, or equivalently prograde inclinations far from the planet, where unstable motion dominates injection, and another for T<= 0.1, or equivalently polar and retrograde inclinations far from the planet, where stable motion dominates injection. The injection modes are independent of the initial semi-major axis and the dynamical time at the collision singularity. The simulations uncovered a region in the polar corridor where the dynamical time exceeds the solar system's age suggesting the possibility of long-lived primordial polar transneptunian reservoirs that supply Centaurs to the giant planets' domain.
description: 13 pages, 12 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society
The Monte Carlo Algorithm With a Pseudorandom Generator
Creators: name: Traub, Joseph F.
name: Wozniakowski, Henryk
Publisher: name: Columbia University
Year: 1992
Subjects: Computer science

description: We analyze the Monte Carlo algorithm for the approximation of
multivariate integrals when a pseudorandom generator is used. We establish lower and upper bounds on the error of such algorithms. We prove that as long as a pseudorandom generator is capable of producing only finitely many points, the Monte Carlo algorithm with such a pseudorandom generator fails for L₂ or continuous functions. It also fails for Lipschitz functions if the number of points does not depend on the number of variables. This is the case if a linear congruential generator is used with one initial seed. On the other hand, if a linear congruential generator of period m is used for each component, with independent uniformly distributed initial seeds, then the Monte Carlo algorithm with such a pseudorandom generator using n function values behaves as for the uniform distribution and its expected error is roughly n⁻½   as long as the number n of function values is less than m².
Defining and negotiating identity and belonging : ethnic name change and maintenance among first-generation Chinese immigrants
Creators: name: Liao, Wenting
Publisher: name: University of British Columbia
Year: 2011

description: The purpose of this grounded theory study was to examine the little researched sociopsychological process behind ethnic name change and maintenance in cross-cultural transitions, including precipitating contexts, events, interpretations and motivations that led to the decision to change or maintain ethnic names, the internal and external experiences pertinent to ethnic name change and maintenance, the patterns and strategies to cope with acculturative stress and perceived barriers in respect to changing and maintaining ethnic names, and the impacts of ethnic name change and maintenance on immigrants’ lives. In order to answer these research questions, ten participants comprising first-generation Chinese immigrants from Mainland China, Taiwan and Hong Kong, including two males and eight females ranging in age between 19 and 45, were interviewed. The findings showed that although many ethnic Chinese felt compelled to adopt western names as a way of adapting to the host society due to feelings of insecurity over their ethnic identities, ethnic name change may not guarantee success in acculturation. In contrast, one’s self-efficacy was much more essential in delivering desired outcomes and coping with acculturative stress. However, ethnic name change likely exerts certain influences on one’s life by affecting the perceptions of an individual by themselves and by others. Based on the differences in the patterns and strategies to cope with acculturative stress between ethnic name changers and non-changers, three styles of defining and negotiating identity and belonging were proposed: enmeshed style, restricted style, and open style. Those who used the open style seemed to be more likely to achieve cultural integration by setting an open, dynamic yet clearly defined cultural boundary. Accordingly, the study proposed a variety of essential components to facilitate acculturation and consolidate cultural identity.
title: Psoriatic arthritis - clinical and radiological diagnosis
Creators: name: Petrovic, Dusan
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Musculoskeletal
subject: Musculoskeletal joint
subject: Musculoskeletal soft tissue
subject: Musculoskeletal spine
subject: Digital radiography
subject: MR
subject: PET-CT
subject: Arthrography
subject: Arthritides
subject: Inflammation
subject: Oedema
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: - To present the typical imaging patterns of psoriatic arthritis (PsA) in different sites of affection in order to increase the effectiveness of radiological diagnosis and to narrow the differential diagnosis...
Heavy top renormalon contribution to fermion propagators
Creators: name: Bettinelli, D.
name: van der Bij, J. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study resummed perturbative contributions due to a heavy top-quark. These renormalon contributions are evaluated for fermion propagators. Results for the top-quark width are given. Estimates of non-perturbative uncertainties are made on the ρ-parameter using different schemes of dealing with the Landau-pole. For the physical top-quark mass the effects are negligible.
description: 30 pages, 14 figures, 1 table; v2: Ref.19 added, typos corrected, final version published in PRD
title: Συγκριτική αξιολόγηση πέντε βασικών Ρωσικών λιμένων
title: Benchmarking of five main Russian ports
titleType: AlternativeTitle
Creators: name: Σπάθαρη, Θεοφανία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2022
Subjects: Ναυτιλία
Λιμάνια
Περιβάλλον
Οικοσυστήματα
Ρωσία
ISPS κώδικας

description: Η παρούσα διπλωματική εργασία αφορά την έρευνα και την καταγραφή πληροφοριών για πέντε βασικούς λιμένες της Ρωσίας, καθώς και τη σύγκριση αυτών σε αρκετούς τομείς. Οι λιμένες αυτοί είναι της Αγίας Πετρούπολης, του Νοβοροσίσκ, του Καλίνινγκραντ, του Αρχάγγελσκ και τέλος του Πετροπάβλοφσκ – Καμτσάτσκι. Αποφάσισα να ασχοληθώ με τους συγκεκριμένους λιμένες για δύο λόγους. Αφενός παρέχουν υπηρεσίες διαφόρων ειδών, όπως για παράδειγμα ο λιμένας Αγίας Πετρούπολης είναι ο μοναδικός από τους πέντε αυτούς λιμένες που παρέχει και την υπηρεσία κρουαζιέρας – επιβατικό σταθμό. Ο δεύτερος λόγος είναι η τοποθεσία αυτών των λιμένων μιας που βρίσκονται σε διαφορετικά σημεία της Ρωσίας με βάση το χάρτη, άρα το κοινό στο οποίο απευθύνονται είναι διαφορετικό σε κάθε περίπτωση. Επίσης, διαφέρουν τόσο στην έκταση τους όσο και στην αναγνώριση που έχουν στο επιστημονικό κοινό, μιας που οι πόλεις στις οποίες βρίσκονται δεν έχουν την ίδια απήχηση και τον ίδιο βαθμό βιωσιμότητας. Αφού λοιπόν συλλέχθηκαν οι απαραίτητες πληροφορίες και προέβηκα στην καταγραφή τους, δημιούργησα τους κατάλληλους πίνακες και διαγράμματα για να με οδηγήσουν στο σωστό συμπέρασμα για την κάθε ενότητα. Στην αρχή μελέτησα την συνολική εικόνα των λιμένων για να ολοκληρώσω την σφαιρική μου εικόνα για κάθε ένα από αυτά και έπειτα εστίασα στις παρεχόμενες υπηρεσίες τους, στις περιβαλλοντικές συνθήκες που επικρατούν στους λιμένες, στο master plan τους και στην εφαρμογή του κώδικα ISPS. Φυσικά δεν θα μπορούσα να παραλείψω τα οικονομικά στοιχεία για τα έτη 2017-2020 και τη σύγκριση αυτών. Φτάνοντας αισίως στο τέλος της εργασίας, θα πρέπει να ειπωθεί ότι το συμπέρασμα για κάθε κεφάλαιο της εργασίας προέκυψε με ευκολία έχοντας πρώτα δημιουργήσει τους κατάλληλους συγκεντρωτικούς πίνακες και διαγράμματα. Ξεκινώντας από τις υπηρεσίες, διαφαίνεται ότι υπάρχουν αρκετές ομοιότητες αλλά και διαφορές, όπως ότι όλοι οι λιμένες προσφέρουν τις παρεχόμενες υπηρεσίες του καθ’ όλο το έτος επί πληρωμή αλλά δύο από τους πέντε ξεχωρίζουν παρέχοντας επιπλέον υπηρεσία. Αυτοί είναι ο λιμένας της Αγίας Πετρούπολης, ο οποίος ασχολείται ενεργά και με την κρουαζιέρα και ο λιμένας του Νοβοροσίσκ που ασχολείται και με το RO-RO. 8 Στο επόμενο κεφάλαιο της εργασίας όπου είναι αφιερωμένο στο master plan και τις περιβαλλοντικές συνθήκες / επιπτώσεις καταλήξαμε στο συμπέρασμα ότι κοινός στόχος είναι η διατήρηση των υψηλών περιβαλλοντικών προτύπων και η μείωση του αντίκτυπου στο οικοσύστημα με κάθε δυνατό τρόπο. Στο τέταρτο κεφάλαιο αναφερθήκαμε στον κώδικα ISPS. Κοινός στόχος και των πέντε λιμένων είναι η προστασία της ανθρώπινης ζωής και φυσικά ο λιμένας να προστατευθεί από κάθε έκνομη ενέργεια. Το τελευταίο κεφάλαιο καταγράφει και συγκρίνει τα οικονομικά στοιχεία για τα έτη 2017 – 2020. Συγκεκριμένα αναλύονται και καταγράφονται τα έσοδα, τα έξοδα και το καθαρό κέρδος τους .
title: Learning by Discrepency: does a score-based peer review system benefit us all ? A teleradiology experience
Creators: name: Williams, Fiona Ruth
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Workforce
subject: Education and training
subject: Audit and standards
subject: Teleradiology
subject: Management
subject: Professional Issues

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Learning by Discrepancy - to understand its true role in quality assurance To discuss & evaluate evidence regarding score-based peer review of Radiology error (discrepency) To consider how this impacts professional collaboration, group learning and...
title: ASTRAKHAN SPOTTED FEVER: DYNAMICS, TERRITORIAL DISTRIBUTION,  STRUCTURE OF MORBIDITY
Creators: name: Ugleva, Svetlana V.
Publisher: name: Astrakhan State Medical University
Year: 2020

description: The rate of spotted fever in the Astrakhan region during the study period (2000-2018) is uneven and characterized by a tendency to its increase. Lethal cases for the first time began to be registered since 2013 and the mortality rate was 1,4 ± 0,4 %. The epidemic rise in the incidence of Astrakhan spotted fever - from June to September (94,5 %). In the distribution of risk areas using intensive morbidity indicators (per 100 thousand population) and landscape conditions, the “risk areas” ofAstrakhan spotted fever contamination were identified. When allocating risk areas using intensive incidence indicators (per 100 thousand population) and landscape conditions, “risk areas” of infection were identified: Volga-Akhtuba floodplain, delta ofVolga. The epidemic process involves all social and age groups ofthe population. The nosoareal submarine is expanding - in 1993, the incidence was noted in the city ofAstrakhan and 3 districts of the region (1,236.7 thousand hectares), by 2013 all 11 districts of the region were involved in the epidemic process (5,292.4  thousand ha). The data presented indicate that cases of disease of Astrakhan spotted fever during the analyzed period were observed annually in all administrative areas ofthe region and indicate a different degree ofintensity of the
epidemic process of Astrakhan spotted fever and confirm the association of natural foci of Astrakhan spotted fever to
certain territories and expansion ofthe nozoareal.
Key words: Astrakhan spottedfever, naturalfocal disease, ixodic ticks, Astrakhan region.
description: Caspian Journal of Medicine and Pharmacy, vol. 1, no. 1, pp. 43-50
title: The mimics of pancreas adenocarcinoma: (Imaging findings & Differentiation of other pancreatic diseases that may be mistaken for pancreatic adenocarcinoma)
Creators: name: Cho, Hyunwoo
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Retrospective
subject: Cancer
subject: Decision analysis
subject: MR
subject: CT
subject: Pancreas
subject: Abdominal Viscera

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: - To inform pancreas adenocarcinoma mimicking pancreatic lesions and neoplasms. - To provide imaging clues for differentiation between PA and its...
title: Congenital chikungunya and central nervous system annomalies
Creators: name: Sacramento, Thatiana
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Not applicable
subject: Obstetrics
subject: Infection
subject: Education and training
subject: Observer performance
subject: Education
subject: Diagnostic procedure
subject: Ultrasound
subject: MR
subject: CT
subject: Paediatric
subject: Obstetrics (Pregnancy / birth / postnatal period)
subject: CNS
subject: Paediatric

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Show the main image findings on infected newborns Correlation among ultrasonography, magnetic resonance imaging and computed tomography Radiology point of view on the outcome of the surviving...