cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Catalogue of model star clusters in the Milky Way and M31 galaxies
Creators: name: Chen, Yingtian
name: Gnedin, Oleg Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Detailed understanding of the formation and evolution of globular clusters (GCs) has been recently advanced through a combination of numerical simulations and analytical models. We employ a state-of-the-art model to create a comprehensive catalogue of simulated clusters in three Milky Way (MW) and three Andromeda (M31) analogue galaxies. Our catalogue aims to connect the chemical and kinematic properties of GCs to the assembly histories of their host galaxies. We apply the model to a selected sample of simulated galaxies that closely match the virial mass, circular velocity profile, and defining assembly events of the MW and M31. The resulting catalogue has been calibrated to successfully reproduce key characteristics of the observed GC systems, including total cluster mass, mass function, metallicity distribution, radial profile, and velocity dispersion. We find that clusters in M31 span a wider range of age and metallicity, relative to the MW, possibly due to M31's recent major merger. Such a merger also heated up the in-situ GC population to higher orbital energy and introduced a large number of ex-situ clusters at large radii. Understanding the impacts of galaxy mergers and accretion on the GC populations is crucial for uncovering the galaxy assembly histories.
description: 16 pages, 8 figures, accepted for publication in MNRAS. The catalogue of model globular clusters available at https://github.com/ognedin/gc_model_mw
Correspondence
Creators: name: Bhagwati, Jagdish N.
name: Langston, Dick
name: Green, Douglas E.
name: Plotz, John
name: Masterson, Mark
name: Markley, Arnold A.
name: Douglas, Lawrence
name: Klein, Morton A.
name: Witten, Edward
name: Weaver, Carolyn
name: Tanner, Michael
Publisher: name: Columbia University
Year: 1998
Subjects: Economics

description: Presents letters to the editor referencing articles and topics discussed in previous. "The Gay Science," which questioned the significance of gay studies; "The Global Fix," which discussed the issue of free trade.; "Sound Investment," which discussed a spirited defense of the benefits of private capital investment.
Comparative upgrading of arab light vacuum residuum via aquaprocessing and thermal cracking
Creators: name: Fathi, Mazin Mohammed Ali
Publisher: name: University of Calgary
Year: 2011

description: Bibliography: p. 124-133.
description: Many pages are in colour.
description: Petroleum residua upgrading via thermal processes is restricted to low conversions due to asphaltene stability limitations. The high cost of hydroprocessing that requires high hydrogen flow and pressure affects the economics of upgrading residual oils. New economic means for upgrading these heavy oils are thus becoming increasingly important. In this work, a novel method, referred to as Aquaprocessing, for upgrading Arabian Light vacuum residue under asphaltenes stability limits by steam catalytic cracking using unsupported Ultra-Dispersed (UD) alkali and a non-noble transition metal catalyst is proposed and investigated in a continuous open tubular reactor pilot plant. Aquaprocessing advantageously dissociates steam over the catalyst into oxygen and hydrogen radicals and promotes their addition to the simultaneously cracked residual oil radicals produced near visbreaking temperatures. The Aquaprocessing experiments are conducted with K/Ni UD catalyst under 260 psig at process temperatures of 430-445 °C and LHSV of 5-10.5 hr⁻¹. Experimental results showed a significant relative increase in the residual oil conversion of 13% by Aquaprocessing at the minimum asphaltenes stability limit when compared to conventional thermal cracking. Using 018 labeled water it is shown that the UD catalyst under high temperatures is capable of dissociating water molecules into hydrogen and oxygen radicals of which oxygen radicals are retrieved in the CO2 of the produced gases. Furthermore, a kinetic model for the upgrading of Arab Light vacuum residue (ALVR) by Aquaprocessing is proposed and investigated in this work. The proposed model is based on five cascaded lumps, which are 540 °C+ residue, VGO (455-540 °C), distillates (204-455 °C), naphtha (IBP-204 °C), and gases. The model fits the experimental values for all components with a mean absolute percentage error of less than 5.5%. Removal of asphaltenes by means of adsorption over low cost adsorbents is also considered an economic way to further upgrade residual oils processed via either thermal cracking or Aquaprocessing. In the final part of this thesis a study of adsorption kinetics and uptake of produced asphaltenes from thermal cracking and Aquaprocessing of Arabian Light vacuum residue (ALVR) over macroporous Ca-kaolin and Ba-Ca-kaolin is performed. Obtained results are compared with adsorption results reported for Athabasca vacuum residue (ATVR) and model molecules over the same modified kaolin. Results show faster adsorption from ALVR at increased conversion severities but lower uptake over C-kaolin. AL YR C7 asphaltenes shows highest adsorption kinetics and uptake when compared to model molecules and ATVR C7 asphaltenes. An upgrading integrated process that combines Aquaprocessing and adsorption is suggested for an improved residua upgrading and conversion based on the experimental findings from this research.
Quantum magnetic oscillations and angle-resolved photoemission from impurity bands in cuprate superconductors
Creators: name: Alexandrov, A. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Present-day angle-resolved photoemission spectroscopy (ARPES) has offered a tremendous advance in the understanding of electron energy spectra in cuprate superconductors and some related compounds. However, in high magnetic field, magnetic quantum oscillations at low temperatures indicate the existence of small electron (hole) Fermi pockets seemingly missing in ARPES of hole (electron) doped cuprates. Here ARPES and quantum oscillations are reconciled in the framework of an impurity band in the charge-transfer Mott-Hubbard insulator.
Precision measurement of the lifetime of the 1s2s3S1 metastable level in heliumlike O6+
Creators: name: Savin, Daniel Wolf
name: Lopez-Urrutia, J. R. Crespo
name: Beiersdorfer, P.
name: Widmann, K.
Publisher: name: Columbia University
Year: 1998
Subjects: Astrophysics
Microphysics
Plasma (Ionized gases)
Physics

description: The lifetime of the 1s2s3S1 level of the He-like O6+ ion has been measured using the Electron Beam Ion Trap in the magnetic trapping mode. A value of 956-4+5 μs is found, which corresponds to a radiative transition rate of 1046-5+4 s-1 for the magnetic dipole transition to the 1s21S0 ground state. This value is in excellent agreement with recent theoretical predictions and distinguishes among different treatments of negative energy states and correlation in multiconfiguration Dirac-Fock calculations.
Lodos residuales como materia prima para la recuperación energética en Ensenada, B.C.
Creators: name: Rojas Remis, Rebeca.
Publisher: name: Universidad Autónoma de Baja California, Ensenada.
Year: 2023
Subjects: subject: Aguas residuales||Ensenada, Baja California||Tesis||Ciencias||Tesis y disertaciones académicas
subject: TD434 R64 2014

description: El aumento de la población en México ha hecho que se incremente la red de agua potable y drenaje, lo que ha dado lugar a la construcción de plantas de tratamiento de aguas residuales (PTAR). Esto ha implicado mayor tratamiento de agua residual y, a su vez, un incremento en la cantidad de lodos residuales generados. Los lodos residuales representan un problema ambiental y social por las cantidades, volúmenes y contaminación que generan. Tan sólo en México se estima que los lodos residuales generados por las 2,029 PTAR públicas del país, generan 640,000 toneladas por año, de los cuales el 76% se dispone como relleno en tierra a cielo abierto.
title: A Pictorial Review of Superior Vena Cava Pathologies – Something Terrible Happened To Me.
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Pathology
subject: Diagnostic procedure
subject: MR
subject: CT
subject: Veins / Vena cava
subject: Vascular

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To learn the variants of superior vena cava pathologies To view the characteristic features of the different imaging...
Araeolaimida De Coninck & Schuurmans Stekhoven 1933
Creators: name: Leduc, Daniel
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Adenophorea
Araeolaimida

description: Order Araeolaimida De Coninck & Schuurmans Stekhoven, 1933   Diagnosis. (Modified from Fonseca & Bezerra (2014) and Lorenzen (1994).) Cuticle smooth, striated, or with transverse rows of punctations. Inner labial sensilla papilliform or not visible; outer labial sensilla and cephalic setae usually in two separate circles. Buccal cavity varies from minute, to cup-shaped or tubular, sometimes equipped with 3–9 odontia (teeth). Amphideal fovea usually loop-shaped or spiral, less commonly bowl-shaped or pore-like. Pharyngeal tubes present in the Comesomatidae and Axonolaimidae and some Diplopeltidae. Pharynx usually cylindrical, sometimes with posterior bulb. Female reproductive system usually with two outstretched ovaries, in some cases only one posterior ovary is present. Males with one or two testes; precloacal supplements sometimes present.
description: Published as part of Leduc, Daniel, 2017, Four new nematode species (Araeolaimida: Comesomatidae, Diplopeltidae) from the New Zealand continental slope, pp. 244-264 in Zootaxa 4237 (2) on page 245, DOI: 10.11646/zootaxa.4237.2.2, http://zenodo.org/record/343781
Near-infrared interferometric observation of the Herbig Ae star HD144432 with VLTI/AMBER
Creators: name: Chen, Lei
name: Kreplin, Alexander
name: Wang, Yang
name: Weigelt, Gerd
name: Hofmann, Karl-Heinz
name: Kraus, Stefan
name: Schertl, Dieter
name: Lagarde, Stephane
name: Natta, Antonella
name: Petrov, Roman
name: Robbe-Dubois, Sylvie
name: Tatulli, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the sub-AU-scale circumstellar environment of the Herbig Ae star HD144432 with near-infrared (NIR) VLTI/AMBER observations to investigate the structure of its inner dust disk. The interferometric observations were carried out with the AMBER instrument in the H and K band. We interpret the measured H- and K-band visibilities, the near- and mid-infrared visibilities from the literature, and the SED of HD144432 by using geometric ring models and ring-shaped temperature-gradient disk models with power-law temperature distributions. We derived a K-band ring-fit radius of 0.17 \pm 0.01 AU and an H-band radius of 0.18 \pm 0.01 AU (for a distance of 145 pc). This measured K-band radius of \sim0.17 AU lies in the range between the dust sublimation radius of \sim0.13 AU (predicted for a dust sublimation temperature of 1500 K and gray dust) and the prediction of models including backwarming (\sim0.27 AU). We found that an additional extended halo component is required in both the geometric and temperature-gradient modeling. In the best temperature- gradient model, the disk consists of two components. The inner part of the disk is a thin ring with an inner radius of \sim0.21 AU, a temperature of \sim1600 K, and a ring thickness \sim0.02 AU. The outer part extends from \sim1 AU to \sim10 AU with an inner temperature of \sim400 K. We find that the disk is nearly face-on with an inclination angle of < 28 degree. Our temperature-gradient modeling suggests that the NIR excess is dominated by emission from a narrow, bright rim located at the dust sublimation radius, while an extended halo component contributes \sim6% to the total flux at 2 μm. The MIR model emission has a two-component structure with \sim20% flux from the inner ring and the rest from the outer part. This two-component structure suggests a disk gap, which is possibly caused by the shadow of a puffed-up inner rim.
description: 7 pages, 5 figures, accepted by A&A
Velocity-resolved high-J CO emission from massive star-forming clumps
Creators: name: Dat, Hoang Thanh
name: Karska, Agata
name: Lee, Min Young
name: Wyrowski, Friedrich
name: Tram, Le Ngoc
name: Yang, Aiyuan Y.
name: Menten, Karl M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (Abridged) Context. Massive star formation is associated with energetic processes, which result in significant gas cooling via far-infrared (IR) lines. Velocity-resolved observations can constrain the kinematics of the gas, allowing the identification of the physical mechanisms responsible for gas heating. Aims. Our aim is to quantify far-infrared CO line emission toward high-mass star-forming regions, identify the high-velocity gas component associated with outflows, and estimate the physical conditions required for the excitation of the observed lines. Methods. Velocity-resolved SOFIA/GREAT spectra of 13 high-mass star forming clumps of various luminosities and evolutionary stages are studied using CO 11-10 and 16-15 lines. Results. All targets show strong high-J CO emission in the far-IR, characterized by broad line wings associated with outflows, thereby significantly increasing the sample of sources with velocity-resolved high-J CO spectra. The contribution of the emission in the line wings does not correlate with the envelope mass or evolutionary stage. Gas rotational temperatures cover a narrow range of 120-220 K for the line wings. The non-LTE radiative transfer models indicate gas densities of 1e5-1e7 cm-3 and N(CO) of 1e17- 1e18 cm-2, similar to physical conditions in deeply-embedded low- and high-mass protostars. The velocity-integrated CO line fluxes correlate with the bolometric luminosity over 7 orders of magnitude including data on the low-mass protostars, suggesting similar processes are responsible for the high-J CO excitation over a significant range of physical scales. Conclusions. Velocity-resolved line profiles allow the detection of outflows toward massive star-forming clumps spanning a broad range of evolutionary stages. The lack of clear evolutionary trends suggest that mass accretion and ejection prevail during the entire lifetime of star-forming clumps.
description: 21 pages, 19 figures, accepted to A&A
Infidelity in dating relationships: undergraduate students' unrealistic expectations regarding the likelihood that their partners are unfaithful
Creators: name: Watkins, Sarah J.
Publisher: name: University of Calgary
Year: 2011

description: Bibliography: p. 132-137
description: Includes copy of ethics approval. Original copy with original Partial Copyright Licence.
description: Dating infidelity occurs frequently and can have devastating consequences for both the relationship and the individuals involved. The present studies investigated whether individuals in dating relationships have unrealistic expectations regarding the likelihood of their partners being unfaithful, what factors are related to expectations, and whether expectations are related to outcomes following infidelity. In the first study, 162 undergraduate students whose partners had been unfaithful to them completed an online questionnaire that retrospectively examined their expectations prior to the infidelity as well as their actual experiences with infidelity. In the second study, 209 undergraduate students in dating relationships were asked about their current expectations for infidelity as well as how they imagine they would respond were they to discover that their partners had been unfaithful. As hypothesized, both studies provided evidence that individuals have unduly optimistic expectations regarding the likelihood that their partners would be unfaithful. Using several comparison points, including published prevalence rates of infidelity, I found that individuals significantly underestimated the likelihood of infidelity. Individuals who had suspected that their partners might be unfaithful or who had experienced a current partner's infidelity reported significantly higher estimates of the likelihood that their partners would be unfaithful than those who had not. My results also suggested that unduly optimistic expectations may be beneficial in the absence of infidelity; as estimates of the likelihood of infidelity decreased, relationship satisfaction increased. Further, unrealistic expectations did not appear to be detrimental in the aftermath of infidelity in that they were not related to forgiveness or relationship dissolution. Together, these studies make important contributions to our understanding of expectations for infidelity in dating relationships and show that, by and large, individuals do not expect that their partners will be unfaithful. As this was the first study to examine expectations for infidelity in dating relationships, further studies are needed to replicate the current findings and to examine other potential costs and benefits of unrealistic expectations. Clinical implications will be discussed, including how this research can be used to normalize an individual's experience following an infidelity. My results will also be considered from an evolutionary perspective.
Equation of state for the one-dimensional attractive δ-potential Bose gas in the weak-coupling regime
Creators: name: Ichikawa, Tsubasa
name: Tsutsui, Izumi
name: Yonezawa, Nobuhiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Approximated formulae for real quasi-momentum and the associated energy spectrum are presented for one-dimensional Bose gas with weak attractive contact interactions. On the basis of the energy spectrum, we obtain the equation of state in the high temperature region, which is found to be the van der Waals equation without volume correction.
description: 4 pages, 1 figure
An Intracellular Threonine of Amyloid-β Precursor Protein Mediates Synaptic Plasticity Deficits and Memory Loss
Creators: name: Lombino, Franco
name: Biundo, Fabrizio
name: Tamayev, Robert
name: Arancio, Ottavio
name: D’Adamio, Luciano
Publisher: name: Columbia University
Year: 2013
Subjects: Pathology
Medicine
Biochemistry

description: Mutations in Amyloid-ß Precursor Protein (APP) and BRI2/ITM2b genes cause Familial Alzheimer and Danish Dementias (FAD/FDD), respectively. APP processing by BACE1, which is inhibited by BRI2, yields sAPPß and ß-CTF. ß-CTF is cleaved by gamma-secretase to produce Aß. A knock-in mouse model of FDD, called FDDKI, shows deficits in memory and synaptic plasticity, which can be attributed to sAPPß/ß-CTF but not Aß. We have investigated further the pathogenic function of ß-CTF focusing on Thr^668 of ß-CTF because phosphorylation of Thr^668 is increased in AD cases. We created a knock-in mouse bearing a Thr^668Ala mutation (APPTA mice) that prevents phosphorylation at this site. This mutation prevents the development of memory and synaptic plasticity deficits in FDDKI mice. These data are consistent with a role for the carboxyl-terminal APP domain in the pathogenesis of dementia and suggest that averting the noxious role of Thr^668 is a viable therapeutic strategy for human dementias.
Characterizing the line emission from molecular clouds. II. A comparative study of California, Perseus, and Orion A
Creators: name: Tafalla, M.
name: Usero, A.
name: Hacar, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: $Aims.$ We characterize the molecular-line emission of three clouds whose star-formation rates span one order of magnitude: California, Perseus, and Orion A. $Methods.$ We use stratified random sampling to select positions representing the different column density regimes of each cloud and observe them with the IRAM-30m telescope. We cover the 3 mm wavelength band and focus our analysis on CO, HCN, CS, HCO+, HNC, and N2H+. $Results.$ We find that the line intensities depend most strongly on the H2 column density. A secondary effect, especially visible in Orion A, is a dependence of the line intensities on the gas temperature. We explored a method that corrects for temperature variations and show that, when it is applied, the emission from the three clouds behaves very similarly. CO intensities vary weakly with column density, while the intensity of traditional dense-gas tracers such as HCN, CS, and HCO+ varies almost linearly with column density. N2H+ differs from all other species in that it traces only cold dense gas. The intensity of the rare HCN and CS isotopologs reveals additional temperature-dependent abundance variations. Overall, the clouds have similar chemical compositions that, as the depth increases, are sequentially dominated by photodissociation, gas-phase reactions, molecular freeze-out, and stellar feedback in the densest parts of Orion A. Our observations also allowed us to calculate line luminosities for each cloud, and a comparison with literature values shows good agreement. We used our HCN data to explore the behavior of the HCN conversion factor, finding that it is dominated by the emission from the outermost cloud layers. It also depends strongly on the gas kinetic temperature. Finally, we show that the HCN/CO ratio provides a gas volume density estimate, and that its correlation with the column density resembles that found in extragalactic observations.
description: 36 pages, 19 figures, accepted for publication in A&A
In search of gravity mode signatures in main sequence solar-type stars observed by Kepler
Creators: name: Breton, Sylvain N.
name: Dhouib, Hachem
name: García, Rafael A.
name: Brun, Allan Sacha
name: Mathis, Stéphane
name: Hernández, Fernando Pérez
name: Mathur, Savita
name: Dyrek, Achrène
name: Santos, Angela R. G.
name: Pallé, Pere L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as probes for stars with radiative interiors. The structural and dynamical constraints that they are able to provide cannot be accessed by other means. While they provide precious insights into the internal dynamics of evolved stars as well as massive and intermediate-mass stars, their non-detection in main sequence (MS) solar-type stars make them a crucial missing piece in our understanding of angular momentum transport in radiative zones and stellar rotational evolution. In this work, we aim to apply certain analysis tools originally developed for helioseismology in order to look for g-mode signatures in MS solar-type stars. We select a sample of the 34 most promising MS solar-type stars with Kepler four-year long photometric time series. All these stars are well-characterised late F-type stars with thin convective envelopes, fast convective flows, and stochastically excited acoustic modes (p modes). For each star, we compute the background noise level of the Fourier power spectrum to identify significant peaks at low frequency. After successfully detecting individual peaks in 12 targets, we further analyse four of them and observe distinct patterns of surrounding peaks with a low probability of being noise artifacts. Comparisons with the predictions from reference models suggest that these patterns are compatible with the presence of non-asymptotic low-order pure g modes, pure p modes, and mixed modes. Given their sensitivity to both the convective core interface stratification and the coupling between p- and g-mode resonant cavities, such modes are able to provide strong constraints on the structure and evolutionary states of the related targets. [abridged]
description: 19 pages, 19 figures, accepted for publication in A&A
Z0 - boson production in association with a top anti-top pair at NLO accuracy with parton shower effects
Creators: name: Garzelli, M. V.
name: Kardos, A.
name: Papadopoulos, C. G.
name: Trocsanyi, Z.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present predictions for the production cross section of a Standard Model Z0-boson in association with a top-antitop pair at the next-to-leading order accuracy in QCD, matched with shower Monte Carlo programs to evolve the system down to the hadronization energy scale. We adopt a framework based on three well established numerical codes, namely the POWHEG-BOX, used for computing the cross section, HELAC-NLO, which generates all necessary input matrix elements, and finally a parton shower program, such as PYTHIA or HERWIG, which allows for including t-quark and Z0-boson decays at the leading order accuracy and generates shower emissions, hadronization and hadron decays.
description: 10 pages, 5 figures; found and corrected a bug in the phenomenological analysis, just affecting Fig.4 - 5 that turn out to change slightly with respect to our previous version and the cross-section values after all cuts. Conclusions qualitatively unchanged
Surgical Margins in Breast Conservation
Creators: name: Feldman, Sheldon
Publisher: name: Columbia University
Year: 2013
Subjects: Surgery
Oncology
Medicine

description: Significant progress has been made in the diagnosis and treatment of breast cancer during the past 30 years. The increased availability of screening mammography has resulted in a higher percentage of woman being diagnosed with early stage disease allowing the option of breast conservation therapy to be more widely available. Long-term follow-up studies clearly demonstrate equivalent survival with breast conservation surgery (lumpectomy) and radiotherapy versus total mastectomy [1–3]. The importance of obtaining clear lumpectomy surgical margins has been well established in minimizing the risk of local recurrence [4]. Unfortunately there is a lack of uniform guidelines in terms of what constitutes an adequately clear lumpectomy margin. Substantial debate about bigger margins being better continues [5]. This has led to wide variations in lumpectomy margin reexcision rates from 15 to 47% [6]. These additional surgical procedures cause significant patient distress, utilize health care resources, and can adversely affect cosmesis. From the patient perspective, they may wonder why we did not get it right the first time. They want their cancer gone while maintaining a normal appearance.This special issue highlights the areas of controversy and demonstrates current best practices and emerging novel approaches towards optimal breast conservation approach. The goal is to improve our ability to provide breast-conserving approaches for breast cancer while avoiding multiple surgical procedures, minimizing recurrence risk while obtaining excellent cosmesis. We have chosen 6 of 16 submissions to be published in this special issue. Each paper was evaluated by at least two expert reviewers and revised according to review comments.
Absence of long-range superconducting correlations in the frustrated 1/2-filled band Hubbard model
Creators: name: Dayal, S.
name: Clay, R. T.
name: Mazumdar, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present many-body calculations of superconducting pair-pair correlations in the ground state of the half-filled band Hubbard model on large anisotropic triangular lattices. Our calculations cover nearly the complete range of anisotropies between the square and isotropic triangular lattice limits. We find that the superconducting pair-pair correlations decrease monotonically with increasing onsite Hubbard interaction U for inter-pair distances greater than nearest neighbor. For the large lattices of interest here the distance dependence of the correlations approaches that for noninteracting electrons. Both these results are consistent with the absence of superconductivity in this model in the thermodynamic limit. We conclude that the effective 1/2-filled band Hubbard model, suggested by many authors to be appropriate for the kappa-(BEDT-TTF)-based organic charge-transfer solids, does not explain the superconducting transition in these materials.
description: 9 pages, 7 figures. Revised version to appear in Phys. Rev. B
Macrofauna béntica del Estero de Punta Banda, Ensenada, Baja California, México
Creators: name: Waumann Rojas, Dora Ofelia.
Publisher: name: Universidad Autónoma de Baja California, Ensenada.
Year: 2023
Subjects: subject: QH91.8 .B4 W38 1998

description: Durante el mes de febrero de 1996 con el objetivo de describir la biodiversidad de la macrofauna bentica del Estero de Punta Banda.
The role of radial migration in open cluster and field star populations with Gaia dr3
Creators: name: Vázquez, Carlos Viscasillas
name: Magrini, Laura
name: Spina, Lorenzo
name: Tautvaišienė, Gražina
name: Van der Swaelmen, Mathieu
name: Randich, Sofia
name: Sacco, Giuseppe Germano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The survival time of a star cluster depends on its total mass, density, and thus size, as well as on the environment in which it was born and in which lies. Its dynamical evolution is influenced by various factors such as gravitational effects of the Galactic bar, spiral structures, and molecular clouds. Overall, the factors that determine the longevity of a cluster are complex and not fully understood. This study aims to investigate if open clusters and field stars respond differently to the perturbations that cause radial migration. In particular, we aim at understanding the nature of the oldest surviving clusters. We compared the time evolution of the kinematic properties of two Gaia DR3 samples: the first sample is composed of $\sim$40 open clusters and the second one of $\sim$66,000 MSTO field stars. Both selected samples are composed of stars selected with the same quality criterion, belonging to the thin disc, in a similar metallicity range, located in the same Galactocentric region [7.5-9 kpc] and with ages >1 Gyr. We performed a statistical analysis comparing the properties of the samples of field stars and of open clusters. A qualitative comparison of kinematic and orbital properties reveals that clusters younger than 2-3 Gyr are more resistant to perturbations than field stars and they move along quasi-circular orbits. Conversely, clusters older than approximately 3 Gyr have more eccentric and inclined orbits than isolated stars in the same age range. Such orbits lead them to reach higher elevations on the Galactic plane, maximising their probability to survive several Gyr longer. A formal statistical analysis reveals that there are differences among the time evolution of most of the kinematic and orbital properties of field stars and open clusters. Our results suggest that oldest survived clusters are usually more massive and move on orbits with higher eccentricity.
description: 13 pages, 20 figures, 2 tables. Article accepted for publication in A&A
title: Radiological signs of diseases of the skin – Skin, what radiologists need to know?
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Infection
subject: Diagnostic procedure
subject: MR
subject: CT
subject: Soft tissues / Skin
subject: Musculoskeletal

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To learn the radiological features in conditions associated with skin diseases. To learn the different manifestations of skin...
Copeptin as a Marker for Severity and Prognosis of Aneurysmal Subarachnoid Hemorrhage
Creators: name: Fung, Christian
name: De Marchis, Gian Marco
name: Katan, Mira
name: Seiler, Marleen
name: Arnold, Marcel
name: Gralla, Jan
name: Raabe, Andreas
name: Beck, Jurgen
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine
subject: Biochemistry
subject: Medicine

description: Background: Grading of patients with aneurysmal subarachnoid hemorrhage (aSAH) is often confounded by seizure, hydrocephalus or sedation and the prediction of prognosis remains difficult. Recently, copeptin has been identified as a serum marker for outcomes in acute ischemic stroke and intracerebral hemorrhage (ICH). We investigated whether copeptin might serve as a marker for severity and prognosis in aSAH.
Methods: Eighteen consecutive patients with aSAH had plasma copeptin levels measured with a validated chemiluminescence sandwich immunoassay. The primary endpoint was the association of copeptin levels at admission with the World Federation of Neurological Surgeons (WFNS) grade score after resuscitation. Levels of copeptin were compared across clinical and radiological scores as well as between patients with ICH, intraventricular hemorrhage, hydrocephalus, vasospasm and ischemia.
Results: Copeptin levels were significantly associated with the severity of aSAH measured by WFNS grade (P = 0.006), the amount of subarachnoid blood (P = 0.03) and the occurrence of ICH (P = 0.02). There was also a trend between copeptin levels and functional clinical outcome at 6-months (P = 0.054). No other clinical outcomes showed any statistically significant association.
Conclusions: Copeptin may indicate clinical severity of the initial bleeding and may therefore help in guiding treatment decisions in the setting of aSAH. These initial results show that copeptin might also have prognostic value for clinical outcome in aSAH.
Model-Based Security Testing
Creators: name: Schieferdecker, Ina
name: Grossmann, Juergen
name: Schneider, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Security testing aims at validating software system requirements related to security properties like confidentiality, integrity, authentication, authorization, availability, and non-repudiation. Although security testing techniques are available for many years, there has been little approaches that allow for specification of test cases at a higher level of abstraction, for enabling guidance on test identification and specification as well as for automated test generation. Model-based security testing (MBST) is a relatively new field and especially dedicated to the systematic and efficient specification and documentation of security test objectives, security test cases and test suites, as well as to their automated or semi-automated generation. In particular, the combination of security modelling and test generation approaches is still a challenge in research and of high interest for industrial applications. MBST includes e.g. security functional testing, model-based fuzzing, risk- and threat-oriented testing, and the usage of security test patterns. This paper provides a survey on MBST techniques and the related models as well as samples of new methods and tools that are under development in the European ITEA2-project DIAMONDS.
description: In Proceedings MBT 2012, arXiv:1202.5826
Rare Variant Analysis for Family-Based Design
Creators: name: De, Gourab
name: Yip, Wai-Ki
name: Ionita-Laza, Iuliana
name: Laird, Nan
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Biometry
subject: Genetics
subject: FOS: Biological sciences

description: Genome-wide association studies have been able to identify disease associations with many common variants; however most of the estimated genetic contribution explained by these variants appears to be very modest. Rare variants are thought to have larger effect sizes compared to common SNPs but effects of rare variants cannot be tested in the GWAS setting. Here we propose a novel method to test for association of rare variants obtained by sequencing in family-based samples by collapsing the standard family-based association test (FBAT) statistic over a region of interest. We also propose a suitable weighting scheme so that low frequency SNPs that may be enriched in functional variants can be upweighted compared to common variants. Using simulations we show that the family-based methods perform at par with the population-based methods under no population stratification. By construction, family-based tests are completely robust to population stratification; we show that our proposed methods remain valid even when population stratification is present.
Erratum for Time Reversal in Neutrino Oscillations
Creators: name: Kisslinger, Leonard S.
name: Henley, Ernest M.
name: Johnson, Mikkel B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggested a new experiment for the MINOS project, with baseline L=735 km, to employ another detector at baseline 2L, which could measure TRV, as with a 10% e-mu conversion at distance L. There would be a 1% increase of the original flavor at 2L, which could be detected.
description: 2 pages, 1 figure
title: Imaging of pituitary pathologies- pituitary in prime focus
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Neoplasia
subject: Diagnostic procedure
subject: MR
subject: CNS
subject: Neuro

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: ·To review the normal anatomy of the pituitary ·To study the various pathologies on various MRI seqeunces and identify pituitary...
Applying Spearman's law of diminishing returns to the construct of emotional intelligence
Creators: name: Chenier, Sonia
Publisher: name: University of Calgary
Year: 2011

description: Bibliography: p. 38-44
description: This study investigated the application of Spearman's Law of Diminishing Returns (SLODR) to the Construct of Emotional Intelligence. The Bar-On Short Form Emotional Intelligence Quotient was administered to 1472 Canadian University students. The participants' scores on the EQ-i was then divided into two groups, according to Spearman's law of distinguishing high ability from low ability, those considered to have low EI scores, and those of High EI scores. Correlation analysis of the subtests within the two groups indicates low inter-correlation. Possible reasons for the low correlations are problems with SLODR methodology, Bar-On self-reporting measures, the defining characteristics of Emotional Intelligence, and poor EQ-i construct validity.
title: Craniosynostosis- Fusional Mismatch!
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Congenital
subject: Computer Applications-Detection, diagnosis
subject: Computer Applications-3D
subject: CT-High Resolution
subject: Bones
subject: Anatomy
subject: Head and Neck

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: This educational poster highlights normal anatomy of cranial sutures, identifying the characteristic skull shape changes of each type of craniosynostosis and the essential role of imaging in their...
Evaluation of Bacterial Load in Broiler Meat in Slaughterhouses in Khartoum State
Creators: name: Ekram I. H.
name: Khalid R. M.
name: Elniema A. Mustafa
Publisher: name: Zenodo
Year: 2023

description: A total of 70 swab samples were collected from two types of broiler slaughterhouses (automatic and manual), in Jabelawlia locality in Khartoum State. The objective of this study was to evaluate the bacterial count in broiler carcasses at three process steps during broiler processing. These were: after slaughtering, after scalding, and after chilling. The samples were collected from three sites in broiler carcasses namely: leg, neck, and brisket; in addition to workers' hands. All swab samples were transported in peptone water and examined in the laboratory for total Viable Count (TVC). The study revealed that the highest TVC in the automatic slaughterhouse was found in the worker's hands during scalding process step (12.0 ±10.9 cfu/ cm2) and the lowest was in the brisket and worker's hands during the chilling process step (0.3 ± 1.7 cfu/ cm2. The highest bacterial load in the manual slaughterhouse was found after the scalding process step in the legs (20.5 ± 14.3 cfu/cm2), and the lowest was found in the neck after chilling process step (5.0±7.07). Means and standard deviation (SD) of TVC of in different process steps in the investigated slaughterhouses showed no significant differences. It could be concluded that TVC was high in manual slaughtering than in automatic slaughtering systems.
title: Imaging Of Salivary Glands - A Pictoral Review!
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Head and Neck
subject: Salivary glands
subject: Conventional radiography
subject: CT
subject: MR
subject: Diagnostic procedure
subject: Acute
subject: Calcifications / Calculi
subject: Neoplasia
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: This poster deals with normal anatomy and the various pathologies of Salivary glands with emphasis on the essential role of imaging in their...
On Transfer Paradoxes and Immiserizing Growth: Part II
Creators: name: Bhagwati, Jagdish N.
name: Srinivasan, T. N.
Publisher: name: Columbia University
Year: 1984
Subjects: Economics

description: In our earlier comment, addressed to Chichilnisky (1980), we considered the error (in the form of an invalid Theorem 1) in her analysis of the transfer problem. We address ourselves here to noting some of those flaws.
Modeling the Galactic center gamma-ray emission with more realistic cosmic-ray dynamics
Creators: name: Scherer, Andrés
name: Cuadra, Jorge
name: Bauer, Franz E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Very-high-energy gamma-ray observations of the Galactic center (GC) show extended emission that is strongly correlated with the morphology of the central molecular zone (CMZ). The best explanation for that emission is a hadronic interaction between cosmic rays (CRs) and ambient gas, where a CR central and continuous source accelerates protons up to 1 PeV ("PeVatron"). However, current models assume very simplistic CR dynamics. Our goal is to verify if more realistic CR dynamics for the GC environment are consistent with current gamma-ray observations, and whether they could be constrained by upcoming observations with the Cherenkov Telescope Array (CTA). We generated synthetic gamma-ray maps using a CR transport model with spherical injection, different diffusion regimes (in and out of the CMZ), polar advection, and mono-energetic particles of 1 PeV, and including different CR populations injected from the Arches, Quintuplet, and nuclear clusters of young massive stars, plus supernova Sgr A East. We adopted two different 3D gas distributions consistent with the observed gas column density, either with or without an inner cavity. In order to reproduce the existing observations detected by the High Energy Stereoscopic System (HESS), a ring-like gas distribution, with its mass set by the standard Galactic CO-to-H$_2$ conversion factor, and CR acceleration from all relevant sources are required. For a conversion factor one order of magnitude lower, injection rates that are ten times higher are needed. We show that CTA will be able to differentiate between models with different CR dynamics, proton sources, and CMZ morphology, owing to its unprecedented sensitivity and angular resolution. More realistic CR dynamics suggest that the CMZ has a large inner cavity and that the GC PeVatron is a composite CR population accelerated by the Arches, Quintuplet, and nuclear star clusters, and Sgr A East.
description: Accepted for publication in A&A. 15 pages, 11 figures
Optimal Trade Policy and Compensation under Endogenous Uncertainty: The Phenomenon of Market Disruption
Creators: name: Bhagwati, Jagdish N.
name: Srinivasan, T. N.
Publisher: name: Columbia University
Year: 1976
Subjects: Economics

description: The paper examines the nature of optimal policy intervention required in the exporting country when there is the possibility of a market-disruption-induced trade restriction being invoked by the importing country. The analysis is conducted primarily with a two-period model, with and without adjustment costs, and the results are related to the well-known policy prescriptions of Bhagwati, Ramaswami, Srinivasan, Johnson et al. in the theory of trade and welfare. The last section extends the argument briefly to steady state analysis. The applicability of the analysis to the symmetric, embargo problem is also noted.
Pairwise Analysis Can Account for Network Structures Arising from Spike-Timing Dependent Plasticity
Creators: name: Babadi, Baktash
name: Abbott, Larry
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Biology
subject: Biology--Classification
subject: Neurosciences
subject: FOS: Clinical medicine

description: Spike timing-dependent plasticity (STDP) modifies synaptic strengths based on timing information available locally at each synapse. Despite this, it induces global structures within a recurrently connected network. We study such structures both through simulations and by analyzing the effects of STDP on pair-wise interactions of neurons. We show how conventional STDP acts as a loop-eliminating mechanism and organizes neurons into in- and out-hubs. Loop-elimination increases when depression dominates and turns into loop-generation when potentiation dominates. STDP with a shifted temporal window such that coincident spikes cause depression enhances recurrent connections and functions as a strict buffering mechanism that maintains a roughly constant average firing rate. STDP with the opposite temporal shift functions as a loop eliminator at low rates and as a potent loop generator at higher rates. In general, studying pairwise interactions of neurons provides important insights about the structures that STDP can produce in large networks.
title: Top 16 Signs In Interventional Radiology
Creators: name: Ilangovan, Gurubharath
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Interventional Radiology
subject: Interventional non-vascular
subject: Interventional vascular
subject: CT-Angiography
subject: CT-High Resolution
subject: Ultrasound
subject: Instrumentation
subject: Treatment effects
subject: Acute
subject: Aneurysms
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To Describe Various Intervenional Radiology Signs Associated With Pathologies. To Interpret And Understand Various Interventional...