cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Investments, communication, sexual frequency, and jealousy in polyamorous relationships: An analysis of partner #1 and partner #2 relationships
Creators: name: Balzarini, Rhonda
name: Campbell, Lorne
name: Holmes, Bjarne
name: Lehmiller, Justin
name: Harman, Jennifer
name: Atkins, Nicole
Publisher: name: Open Science Framework
Year: 2022

description: The main goal of the current project is to examine investments, communication, sexual frequency, and jealousy in polyamorous relationships, comparing partner #1 and partner #2 relationships. Our hypotheses are based on the Investment Model and demographic data from a sample of 3,530 adults who identify as polyamorous (see Holmes et al., 2014). The Investment Model measures commitment level, which is a function of three bases of dependence: (1) higher levels of satisfaction, (2) lower quality of alternatives, and (3) higher investments (Le & Agnew, 2003); and has been found to predict cognition and behavior within relationships (Rusbult & Agnew, 2010). Furthermore, demographic data– namely, that people in polyamorous relationships are likely to: (1) have a greater relationship duration with partner #1 than partner #2, (2) to live with partner #1 more frequently than reports of living with partner #2, and (3) to consider partner #1 a “primary” relationship as opposed to partner #2— assist us in making the following hypotheses (see attached documents for hypotheses and measures).
Two-photon spectroscopy of tungsten(0) arylisocyanides using nanosecond-pulsed excitation
Creators: name: Gray, Harry B.
name: Takematsu, Kana
name: Wehlin, Sara A. M.
name: Sattler, Wesley
name: Winkler, Jay R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: The two-photon absorption (TPA) cross sections ( δ ) for tungsten(0) arylisocyanides (W(CNAr) 6 ) were determined in the 800–1000 nm region using two-photon luminescence (TPL) spectroscopy.
title: Accuracy of Integrated Imaging techniques in pediatric airway diseases
Creators: name: Stagnaro, Nicola
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Tissue characterisation
subject: Pathology
subject: Congenital
subject: Surgery
subject: Diagnostic procedure
subject: Computer Applications-Virtual imaging
subject: MR
subject: Fluoroscopy
subject: CT
subject: Thorax
subject: Paediatric
subject: Lung

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Pediatric airway anomalies represent a challenging pathology to treat, even for the most skilled Multidisciplinary Units of tertiary care hospitals. Primary aim of our study is to evaluate the accuracy of non- or mini-invasive imaging techniques to...
A longitudinal study of DNA methylation as a potential mediator of age-related diabetes risk
Creators: name: Stewart, James D.
name: Manson, JoAnn E.
name: Whitsel, Eric A.
name: Li, Yun
name: Jafari, Nadereh
name: Zhang, Guosheng
name: Lamichhane, Archana
name: Conneely, Karen N.
name: Baccarelli, Andrea A.
name: Grant, Crystal D.
name: Hou, Lifang
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: DNA methylation (DNAm) has been found to show robust and widespread age-related changes across the genome. DNAm profiles from whole blood can be used to predict human aging rates with great accuracy. We sought to test whether DNAm-based predictions of age are related to phenotypes associated with type 2 diabetes (T2D), with the goal of identifying risk factors potentially mediated by DNAm. Our participants were 43 women enrolled in the Women's Health Initiative. We obtained methylation data via the Illumina 450K Methylation array on whole blood samples from participants at three timepoints, covering on average 16 years per participant. We employed the method and software of Horvath, which uses DNAm at 353 CpGs to form a DNAm-based estimate of chronological age. We then calculated the epigenetic age acceleration, or Δage, at each timepoint. We fit linear mixed models to characterize how Δage contributed to a longitudinal model of aging and diabetes-related phenotypes and risk factors. For most participants, Δage remained constant, indicating that age acceleration is generally stable over time. We found that Δage associated with body mass index (p = 0.0012), waist circumference (p = 0.033), and fasting glucose (p = 0.0073), with the relationship with BMI maintaining significance after correction for multiple testing. Replication in a larger cohort of 157 WHI participants spanning 3 years was unsuccessful, possibly due to the shorter time frame covered. Our results suggest that DNAm has the potential to act as a mediator between aging and diabetes-related phenotypes, or alternatively, may serve as a biomarker of these phenotypes.
Continuum discretized BCS approach for weakly bound nuclei
Creators: name: Lay, J. A.
name: Alonso, C. E.
name: Fortunato, L.
name: Vitturi, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bardeen-Cooper-Schrieffer (BCS) formalism is extended by including the single-particle continuum in order to analyse the evolution of pairing in an isotopic chain from stability up to the drip line. We propose a continuum discretized generalized BCS based on single-particle pseudostates (PS). These PS are generated from the diagonalization of the single-particle Hamiltonian within a Transformed Harmonic Oscillator (THO) basis. The consistency of the results versus the size of the basis is studied. The method is applied to neutron rich Oxygen and Carbon isotopes and compared with similar previous works and available experimental data. We make use of the flexibility of the proposed model in order to study the evolution of the occupation of the low-energy continuum when the system becomes weakly bound. We find a larger influence of the non-resonant continuum as long as the Fermi level approaches zero.
description: 20 pages, 16 figures, to be submitted
title: Optimizing VolparaDensity’s volumetric breast density thresholds to align with the American College of Radiology BI-RADS 5th edition updates
Creators: name: Tromans, Christopher
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Image verification
subject: Cancer
subject: Screening
subject: Mammography
subject: Breast

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The primary goal of mammographic screening is to reduce breast cancer mortality through earlier detection [1]. However, due to the similarity in X-ray attenuation between fibroglandular (“dense”) tissue and potential lesions, one of the...
How does cytomegalovirus factor into diseases of aging and vaccine responses, and by what mechanisms?
Creators: name: Frasca, Daniela
name: Chiu, Yen-Ling
name: Aiello, Allison E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Cytomegalovirus (CMV) is an important pathogen for both clinical and population settings. There is a growing body of research implicating CMV in multiple health outcomes across the life course. At the same time, there is mounting evidence that individuals living in poverty are more likely to be exposed to CMV and more likely to experience many of the chronic conditions for which CMV has been implicated. Further research on the causal role of CMV for health and well-being is needed. However, the strong evidence implicating CMV in type 2 diabetes, autoimmunity, cancer, cardiovascular disease, vaccination, and age-related alterations in immune function warrants clinical and public health action. This imperative is even higher among individuals living in socioeconomically disadvantaged settings and those exposed to high levels of chronic psychosocial stress.
title: A validation study of automated mammographic breast positioning metrics
Creators: name: Tromans, Christopher
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Breast
subject: Mammography
subject: Screening
subject: Cancer
subject: Image verification

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The aim of screening mammography is the early detection of breast cancer, and to achieve this goal, optimal image acquisition with maximum breast tissue visualization are essential. Mammography has been described as the science of imaging, and the...
Uninsured migrants: Health insurance coverage and access to care among Mexican return migrants
Creators: name: Wassink, Joshua T.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Background: Despite an expansive body of research on health and access to medical care among Mexican immigrants in the United States, research on return migrants focuses primarily on their labor market mobility and contributions to local development.

Objective: Motivated by recent scholarship that documents poor mental and physical health among Mexican return migrants, this study investigates return migrants' health insurance coverage and access to medical care.

Methods: I use descriptive and multivariate techniques to analyze data from the 2009 and 2014 rounds of Mexico's National Survey of Demographic Dynamics (ENADID, combined n=632,678).

Results: Analyses reveal a large and persistent gap between recent return migrants and non-migrants, despite rising overall health coverage in Mexico. Multivariate analyses suggest that unemployment among recent arrivals contributes to their lack of insurance. Relative to non-migrants, recently returned migrants rely disproportionately on private clinics, pharmacies, self-medication, or have no regular source of care. Mediation analysis suggests that returnees' high rate of uninsurance contributes to their inadequate access to care.

Conclusion: This study reveals limited access to medical care among the growing population of Mexican return migrants, highlighting the need for targeted policies to facilitate successful reintegration and ensure access to vital resources such as health care.
Parametric resonance after hilltop inflation caused by an inhomogeneous inflaton field
Creators: name: Antusch, Stefan
name: Cefala, Francesco
name: Nolde, David
name: Orani, Stefano
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study preheating after hilltop inflation where the inflaton couples to another scalar field, e.g. a right-handed sneutrino, which provides a mechanism for generating the correct initial conditions for inflation and also a decay channel for the inflaton that allows for reheating and non-thermal leptogenesis. In the presence of such a coupling, we find that after the phases of tachyonic preheating and tachyonic oscillations, during which the inflaton field becomes inhomogeneous, there can be a subsequent preheating phase where the fluctuations of the other field get resonantly enhanced, from initial vacuum fluctuations up to amplitudes of the same order (and even larger) as the ones of the inflaton field. This resonant enhancement differs from the usual parametric resonance as the inflaton field is inhomogeneous at the time the enhancement takes place. We study this effect using lattice simulations as well as semi-analytically with a generalized Floquet analysis for inhomogeneous background fields.
description: 25 pages, 9 figures; v2: matches publication in JCAP
title: Role of brain water changes in neuropsychiatric impairments in HCV positive patients with chronic liver disease
Creators: name: Seifeldein, Gehan
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Oedema
subject: Diagnostic procedure
subject: MR-Functional imaging
subject: Neuroradiology brain

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: HCV-positive individuals frequently exhibit brain dysfunction represented by neuropsychiatric and cognitive impairments, which can be independent of the severity of liver disease, hepatic encephalopathy, viral load, genotype, and comorbid drug abuse...
title: Is there any correlation between MRI features of breast lesions of BI-RADs category 4 with histopathologic results?
Creators: name: Farghadani, Maryam
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Biopsy
subject: MR
subject: Breast
subject: Pathology

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Nowadays dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is a well-established modality in screening for breast cancer in high risk patients. During the recent years, many studies have been done to determine the most signifi­cant...
Range corrections in Proton Halo Nuclei
Creators: name: Ryberg, Emil
name: Forssén, Christian
name: Hammer, H. -W.
name: Platter, Lucas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyze the effects of finite-range corrections in halo effective field theory for S-wave proton halo nuclei. We calculate the charge radius to next-to-leading order and the astrophysical S-factor for low-energy proton capture to fifth order in the low-energy expansion. As an application, we confront our results with experimental data for the S-factor for proton capture on Oxygen-16 into the excited $1/2^+$ state of Fluorine-17. Our low-energy theory is characterized by a systematic low-energy expansion, which can be used to quantify an energy-dependent model error to be utilized in data fitting. Finally, we show that the existence of proton halos is suppressed by the need for two fine tunings in the underlying theory.
description: 30pages, 12 figures
title: The role of Paediatric Skull X-rays in today's scenario
Creators: name: Arora, Prashant
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Neoplasia
subject: Metabolic disorders
subject: Congenital
subject: Cost-effectiveness
subject: Conventional radiography
subject: Paediatric
subject: Head and neck

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Owing to the steady uprising of cross sectional imaging over the years, the importance of conventional techniques has been neglected. However the use of conventional imaging in the diagnosis of skeletal conditions is still gold standard especially...
MPEC 2023-Q112 : 2023 QG4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 QG4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Fitting Age-Period-Cohort Models Using the Intrinsic Estimator: Assumptions and Misapplications
Creators: name: Hummer, Robert A.
name: Finch, Brian Karl
name: Lin, Shih-Fan
name: Masters, Ryan K.
name: Powers, Daniel A.
name: Beck, Audrey
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: We thank Demography’s editorial office for the opportunity to respond to te Grotenhuis et al.’s commentary regarding the methods used and the results presented in our earlier paper (Masters et al. 2014). In this response, we briefly reply to three general themes raised in the commentary: (1) the presentation and discussion of APC results, (2) the fitting of full APC models to data for which a simpler model holds, and (3) the variation in the estimated age, period, and cohort coefficients produced by the intrinsic estimator (IE) (i.e., the “non-uniqueness property” of the IE, as referred to by Pelzer et al. (2015)).
Electroweak Vacuum Stability and the Seesaw Mechanism Revisited
Creators: name: Ng, John
name: de la Puente, Alejandro
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the electroweak vacuum stability in Type I seesaw models for 3 generations of neutrinos in scenarios where the right-handed neutrinos have explicit bare mass terms in the Lagrangian and where these are dynamically generated through the mechanism of spontaneous symmetry breaking. To best highlight the difference of the two cases we concentrate on the absolute stability of the scalar potential. We observe that for the first scenario, the scale at which the scalar potential becomes unstable is lower from that within the Standard Model. In addition the Yukawa couplings $\mathbf{Y}_ν$ are constrained such that $\Tr{[\mathbf{Y}^{\dagger}_ν\mathbf{Y}_ν}] \lesssim10^{-3}$. In the second scenario the electroweak stability can be improved in a large region of parameter space. However, we found that the scalar used to break the lepton number symmetry cannot be too light and have a large coupling to right-handed neutrinos in order for the seesaw mechanism to be a valid mechanism for neutrino mass generation. In this case we have $\Tr [\mathbf{Y}^\dagger_ν \mathbf{Y}_ν]\lesssim 0.01$.
Hispanic-White Differences in Lifespan Variability in the United States
Creators: name: Nau, Claudia
name: Lariscy, Joseph T.
name: Firebaugh, Glenn
name: Hummer, Robert A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: This study is the first to investigate whether and, if so, why Hispanics and non-Hispanic whites in the United States differ in the variability of their lifespans. Although Hispanics enjoy higher life expectancy than whites, very little is known about how lifespan variability—and thus uncertainty about length of life—differs by race/ethnicity. We use 2010 U.S. National Vital Statistics System data to calculate lifespan variance at ages 10 and older for Hispanics and whites, and then decompose the Hispanic-white variance difference into cause-specific spread, allocation, and timing effects. In addition to their higher life expectancy relative to whites, Hispanics also exhibit 7 % lower lifespan variability, with a larger gap among women than men. Differences in cause-specific incidence (allocation effects) explain nearly two-thirds of Hispanics’ lower lifespan variability, mainly because of the higher mortality from suicide, accidental poisoning, and lung cancer among whites. Most of the remaining Hispanic-white variance difference is due to greater age dispersion (spread effects) in mortality from heart disease and residual causes among whites than Hispanics. Thus, the Hispanic paradox—that a socioeconomically disadvantaged population (Hispanics) enjoys a mortality advantage over a socioeconomically advantaged population (whites)—pertains to lifespan variability as well as to life expectancy. Efforts to reduce U.S. lifespan variability and simultaneously increase life expectancy, especially for whites, should target premature, young adult causes of death—in particular, suicide, accidental poisoning, and homicide. We conclude by discussing how the analysis of Hispanic-white differences in lifespan variability contributes to our understanding of the Hispanic paradox.
The QUEST-La Silla AGN Variability Survey
Creators: name: Cartier, Régis
name: Lira, Paulina
name: Coppi, Paolo
name: Sánchez, Paula
name: Arévalo, Patricia
name: Bauer, Franz E.
name: Rabinowitz, David
name: Zinn, Robert
name: Muñoz, Ricardo R.
name: Meza, Nicolás
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the characterization and initial results from the QUEST-La Silla AGN variability survey. This is an effort to obtain well sampled optical light curves in extragalactic fields with unique multi-wavelength observations. We present photometry obtained from 2010 to 2012 in the XMM-COSMOS field, which was observed over 150 nights using the QUEST camera on the ESO-Schmidt telescope. The survey uses a broadband filter, the $Q$-band, similar to the union of the $g$ and the $r$ filters, achieving an intrinsic photometric dispersion of $0.05$ mag, and a systematic error of $0.05$ mag in the zero-point. Since some detectors of the camera show significant non-linearity, we use a linear correlation to fit the zero-points as a function of the instrumental magnitudes, thus obtaining a good correction to the non-linear behavior of these detectors. We obtain good photometry to an equivalent limiting magnitude of $r\sim 20.5$. Studying the optical variability of X-ray detected sources in the XMM-COSMOS field, we find that the survey is $\sim75-80$% complete to magnitudes $r\sim20$, and $\sim67$% complete to a magnitude $r\sim21$. The determination and parameterization of the structure function (${SF}_{norm}(τ) = A τ^γ$) of the variable sources shows that most BL AGN are characterized by $A > 0.1$ and $γ> 0.025$. It is further shown that variable NL AGN and GAL sources occupying the same parameter space in $A$ and $γ$ are very likely to correspond to obscured or low luminosity AGN. Our samples are, however, small, and we expect to revisit these results using larger samples with longer light curves obtained as part of our ongoing survey.
description: Accepted for publication in ApJ
Transformation of fractions into simple fractions in divisive meadows
Creators: name: Bergstra, J. A.
name: Middelburg, C. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 12E12, 12L12, 68Q65

description: Meadows are alternatives for fields with a purely equational axiomatization. At the basis of meadows lies the decision to make the multiplicative inverse operation total by imposing that the multiplicative inverse of zero is zero. Divisive meadows are meadows with the multiplicative inverse operation replaced by a division operation. Viewing a fraction as a term over the signature of divisive meadows that is of the form p / q, we investigate which divisive meadows admit transformation of fractions into simple fractions, i.e. fractions without proper subterms that are fractions.
description: 23 pages; one theorem and two corollaries of it added at end of Sect. 5; some minor errors corrected
MPEC 2023-Q113 : 2023 QH4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 QH4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Comparison of different methods to assess alveolar cleft defects in cone beam CT images
Creators: name: De Almeida, Solange Maria
name: Tyndall, Donald A.
name: Wood, Jeyhan S.
name: De Rezende Barbosa, Gabriella Lopes
name: Pimenta, Luiz A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: This study aimed to evaluate the accuracy of three different methods for assessing the volume of cleft defects in CBCT images. The influence of field of view (FOV) and voxel sizes was also assessed.
title: Alteration of white matter integrity in chronic obstructive pulmonary disease: tract based analysis using TRActs Constrained by UnderLying Anatomy
Creators: name: Um, Mikyung
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Neuroradiology brain
subject: MR-Diffusion/Perfusion
subject: Computer Applications-General

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The purpose of this study was to investigate the alteration of white matter (WM) integrity in patients with chronic obstructive pulmonary disease...
title: Novel design of a MRI based patient and structure specific 3D-printed treatment planning phantom for radiation therapy of prostate cancer
Creators: name: Bloch, B. Nicolas
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Oncology
subject: MR
subject: Computer Applications-3D
subject: Image guided radiotherapy

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Introduction: External beam radiation therapy (EBRT) has been proven to decrease mortality in localized (confined to the gland) and locally advanced (extending beyond the gland without metastatic disease) prostate cancer when used as the primary...
title: Public comment sentiment on educational videos: Understanding the effects of presenter gender, video format, threading, and moderation on YouTube TED talk comments
Creators: name: Veletsianos, George
name: Kimmons, Royce
name: Larsen, Ross
name: Dousay, Tonia A.
name: Lowenthal, Patrick R.
Publisher: name: PLOS ONE
Year: 2018
Subjects: Educational films
Internet videos
Gender

description: The definitive version of record of this article is available at https://doi.org/10.1371/journal.pone.0197331.
description: Scholars, educators, and students are increasingly encouraged to participate in online spaces. While the current literature highlights the potential positive outcomes of such participation, little research exists on the sentiment that these individuals may face online and on the factors that may lead some people to face different types of sentiment than others. To investigate these issues, we examined the strength of positive and negative sentiment expressed in response to TEDx and TED-Ed talks posted on YouTube (n = 655), the effect of several variables on comment and reply sentiment (n = 774,939), and the projected effects that sentiment-based moderation would have had on posted content. We found that most comments and replies were neutral in nature and some topics were more likely than others to elicit positive or negative sentiment. Videos of male presenters showed greater neutrality, while videos of female presenters saw significantly greater positive and negative polarity in replies. Animations neutralized both the negativity and positivity of replies at a very high rate. Gender and video format influenced the sentiment of replies and not just the initial comments that were directed toward the video. Finally, we found that using sentiment as a way to moderate offensive content would have a significant effect on non-offensive content. These findings have far-reaching implications for social media platforms and for those who encourage or prepare students and scholars to participate online.
Ex vivo evaluation of new 2D and 3D dental radiographic technology for detecting caries
Creators: name: Bangdiwala, Ananta
name: Everett, Eric T.
name: Gaalaas, Laurence
name: Mol, André
name: Tyndall, Donald
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Proximal dental caries remains a prevalent disease with only modest detection rates by current diagnostic systems. Many new systems are available without controlled validation of diagnostic efficacy. The objective of this study was to evaluate the diagnostic efficacy of three potentially promising new imaging systems.
A High-Resolution Multiband Survey of Westerlund 2 With the Hubble Space Telescope I: Is the Massive Star Cluster Double?
Creators: name: Zeidler, Peter
name: Sabbi, Elena
name: Nota, Antonella
name: Grebel, Eva K.
name: Tosi, Monica
name: Bonanos, Alceste Z.
name: Pasquali, Anna
name: Christian, Carol
name: de Mink, Selma E.
name: Ubeda, Leonardo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present first results from a high resolution multi-band survey of the Westerlund 2 region with the Hubble Space Telescope. Specifically, we imaged Westerlund 2 with the Advanced Camera for Surveys through the $F555W$, $F814W$, and $F658N$ filters and with the Wide Field Camera 3 in the $F125W$, $F160W$, and $F128N$ filters. We derive the first high resolution pixel-to-pixel map of the color excess $E(B-V)_g$ of the gas associated with the cluster, combining the H$α$ ($F658N$) and Pa$β$ ($F128N$) line observations. We demonstrate that, as expected, the region is affected by significant differential reddening with a median of $E(B-V)_g=1.87$~mag. After separating the populations of cluster members and foreground contaminants using a $(F814W-F160W)$ vs. $F814W$ color-magnitude diagram, we identify a pronounced pre-main-sequence population in Westerlund 2 showing a distinct turn-on. After dereddening each star of Westerlund 2 individually in the color-magnitude diagram we find via over-plotting PARSEC isochrones that the distance is in good agreement with the literature value of $\sim4.16 \pm 0.33$~kpc. With zero-age-main-sequence fitting to two-color-diagrams, we derive a value of total to selective extinction of $R_V=3.95 \pm 0.135$. A spatial density map of the stellar content reveals that the cluster might be composed of two clumps. We estimate the same age of 0.5-2.0 Myr for both clumps. While the two clumps appear to be coeval, the northern clump shows a $\sim 20 \%$ lower stellar surface density.
description: 24 pages, 27 figures, 7 tables; Accepted for publication to The Astronomical Journal
title: When the shoe doesn’t fit: Supporting students who are challenged by online educational technologies
Creators: name: Axe, Jo
name: March, Donna
Publisher: name: ALT-C 2009 "In dreams begins responsibility" - Choice, Evidence and Change
Year: 2009
Subjects: Action research in education
Student learning

description: Available under License Creative Commons Attribution Non-commercial No Derivatives.
description: Taking an action research approach, this paper explores the experiences of graduate level students who found a technology enabled classroom challenging. After taking part in an online orientation activity, the students began their studies in a three week face-to-face residency, followed by two distance learning sessions. At the end of the second session, 15% of the students had either taken a leave of absence, or left the program permanently. Current literature focuses on several issues that have a negative influence on students’ ability to achieve their educational goals in an online environment. These issues include isolation, lack of preparedness, and feeling overwhelmed. Building on this, we explored the following question: How can educational technology be used to increase retention for students enrolled in an online course? Aimed at identifying approaches to overcoming some of the problems associated with studying online, we sought to examine the perceptions of MBA students by asking the participants to take part in a focus group discussion. This paper will discuss the challenges found by the graduate level students who worked in a computer-mediated educational environment, as well as highlight some of the solutions aimed at increasing student retention by enhancing the online classroom. Findings revealed that technologies aimed at encouraging student presence in the online classroom, as well as those that allow them to interact socially online could positively increase student retention. In addition, employing tools that support the students’ desire to repeat and reflect on material serves to improve the experience for those studying online. Finally, instructors who display comfort with the use of technology also have a positive impact on student learning. By providing a heightened awareness of the issues faced by graduate students working online, as well as spotlighting some key solutions, this study underscores the importance of targeting appropriate technologies when designing the online classroom. Further studies in this area could explore undergraduate engagement, generational differences, as well as learning preferences in the context of online learning.
Catastrophizing, rumination, and reappraisal prospectively predict adolescent PTSD symptom onset following a terrorist attack: Jenness et al.
Creators: name: Jager-Hyman, Shari
name: Sheridan, Margaret A.
name: Jenness, Jessica L.
name: Beck, Aaron T.
name: Heleniak, Charlotte
name: McLaughlin, Katie A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Disruptions in emotion regulation are a transdiagnostic risk factor for psychopathology. However, scant research has examined whether emotion regulation strategies are related to the onset of posttraumatic stress disorder (PTSD) symptoms among youths exposed to trauma. We investigated whether pretrauma emotion regulation strategies prospectively predicted PTSD symptom onset after the 2013 Boston Marathon terrorist attack among adolescents and whether these associations were moderated by the degree of exposure to media coverage of the attack.
Spin-Driven Nematic Instability of the Multi-Orbital Hubbard Model: Application to Iron-Based Superconductors
Creators: name: Christensen, M. H.
name: Kang, Jian
name: Andersen, B. M.
name: Fernandes, R. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Nematic order resulting from the partial melting of density-waves has been proposed as the mechanism to explain nematicity in iron-based superconductors. An outstanding question, however, is whether the microscopic electronic model for these systems -- the multi-orbital Hubbard model -- displays such an ordered state as its leading instability. In contrast to usual electronic instabilities, such as magnetic and charge order, this fluctuation-driven phenomenon cannot be captured by the standard RPA method. Here, by including fluctuations beyond RPA in the multi-orbital Hubbard model, we derive its nematic susceptibility and contrast it with its ferro-orbital order susceptibility, showing that its leading instability is the spin-driven nematic phase. Our results also demonstrate the primary role played by the $d_{xy}$ orbital in driving the nematic transition, and reveal that high-energy magnetic fluctuations are essential to stabilize nematic order in the absence of magnetic order.
description: 8 pages, 6 figures
Multipole Expansions of Aggregate Charge: How Far to Go?
Creators: name: Matthews, Lorin S.
name: Coleman, Douglas A.
name: Hyde, Truell W.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Aggregates immersed in a plasma or radiative environment will have charge distributed over their extended surface. Previous studies have modeled the aggregate charge using the monopole and dipole terms of a multipole expansion, with results indicating that the dipole-dipole interactions play an important role in increasing the aggregation rate and altering the morphology of the resultant aggregates. This study examines the effect that including the quadrupole terms has on the dynamics of aggregates interacting with each other and the confining electric fields in laboratory experiments. Results are compared to modeling aggregates as a collection of point charges located at the center of each spherical monomer comprising the aggregate.
description: 6 pages
Efficient Formation of Ultracold Molecules with Chirped Nanosecond Pulses
Creators: name: Carini, J. L.
name: Kallush, S.
name: Kosloff, R.
name: Gould, P. L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We describe experiments and associated quantum simulations involving the production of ultracold $^{87}$Rb$_{2}$ molecules with nanosecond pulses of frequency-chirped light. With appropriate chirp parameters, the formation is dominated by coherent processes. For a positive chirp, excited molecules are produced by photoassociation early in the chirp, then transferred into high vibrational levels of the lowest triplet state by stimulated emission later in the chirp. Generally good agreement is seen between the data and the simulations. Shaping of the chirp can lead to a significant enhancement of the formation rate. Further improvements using higher intensities and different intermediate states are predicted.
Background Oriented Schlieren in a Density Stratified Fluid
Creators: name: Verso, Lilly
name: Liberzon, Alex
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Non-intrusive quantitative fluid density measurements methods are essential in stratified flow experiments. Digital imaging leads to synthetic Schlieren methods in which the variations of the index of refraction are reconstructed computationally. In this study, an important extension to one of these methods, called Background Oriented Schlieren (BOS), is proposed. The extension enables an accurate reconstruction of the density field in stratified liquid experiments. Typically, the experiments are performed by the light source, background pattern, and the camera positioned on the opposite sides of a transparent vessel. The multi-media imaging through air-glass-water-glass-air leads to an additional aberration that destroys the reconstruction. A two-step calibration and image remapping transform are the key components that correct the images through the stratified media and provide non-intrusive full-field density measurements of transparent liquids.
Adenomatous polyposis coli regulates radial axonal sorting and myelination in the PNS
Creators: name: Anton,
name: Popko, Brian
name: Traka, Maria
name: Elbaz, Benayahu
name: Lutz, Amanda Brosius
name: Soliven, Betty
name: Dukala, Danuta
name: Kunjamma, Rejani B.
name: Barres, Ben A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: The tumor suppressor protein adenomatous polyposis coli (APC) is multifunctional – it participates in the canonical Wnt/β-catenin signal transduction pathway as well as modulating cytoskeleton function. Although APC is expressed by Schwann cells, the role that it plays in these cells and in the myelination of the peripheral nervous system (PNS) is unknown. Therefore, we used the Cre-lox approach to generate a mouse model in which APC expression is specifically eliminated from Schwann cells. These mice display hindlimb weakness and impaired axonal conduction in sciatic nerves. Detailed morphological analyses revealed that APC loss delays radial axonal sorting and PNS myelination. Furthermore, APC loss delays Schwann cell differentiation in vivo, which correlates with persistent activation of the Wnt signaling pathway and results in perturbed extension of Schwann cell processes and disrupted lamellipodia formation. In addition, APC-deficient Schwann cells display a transient diminution of proliferative capacity. Our data indicate that APC is required by Schwann cells for their timely differentiation to mature, myelinating cells and plays a crucial role in radial axonal sorting and PNS myelination.
title: Content is king: An analysis of how the twitter discourse surrounding open education unfolded from 2009 to 2016
Creators: name: Paskevicius, Michael
name: Veletsianos, George
name: Kimmons, Royce
Publisher: name: International Review of Research in Open and Distributed Learning
Year: 2018
Subjects: Twitter
Open educational resources

description: This is an open peer-reviewed article available at http://dx.doi.org/10.19173/irrodl.v19i1.3267.
description: Inspired by open educational resources, open pedagogy, and open source software, the openness movement in education has different meanings for different people. In this study, we use Twitter data to examine the discourses surrounding openness as well as the people who participate in discourse around openness. By targeting hashtags related to open education, we gathered the most extensive dataset of historical open education tweets to date (n = 178,304 tweets and 23,061 users) and conducted a mixed methods analysis of openness from 2009 to 2016. Findings show that the diversity of participants has varied somewhat over time and that the discourse has predominantly revolved around open resources, although there are signs that an increase in interest around pedagogy, teaching, and learning is emerging.
title: Automatic method to support radiologists in choosing the most representative slices in CT perfusion of lung cancer
Creators: name: Malavasi, Silvia
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Computer applications
subject: Lung
subject: Oncology
subject: CT-Quantitative
subject: CAD
subject: Decision analysis
subject: Imaging sequences
subject: Cancer
subject: Neoplasia

description: Purpose Methods and materials Results Conclusion Personal information References
description: Purpose: During the last decade, thanks to the introduction in the clinical practice of the new anti-angiogenetic therapies, aiming at inhibiting tumour vascularization to prevent their growth, spread, and capability of generating metastasis, cancer...
title: Zur Erinnerung an Hans Konrad von Orelli, Oberst der Artillerie
title: Geboren 2. März 1853, gestorben 19. März 1904
titleType: Subtitle
Creators: name: Weber, Robert
name: Wyss, Heinrich
Publisher: name: Huber & Co.
Year: 1904
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Orelli, Hans Conrad von
subject: Zürich
subject: Neapel

description: Enthält: Abschiedsworte am Sarge von Oberst Konrad von Orelli gesprochen im Krematorium Zürich am 26. März 1904 (von) Oberst Robert Weber ; Rede von Stadtrat Heinrich Wyss ; Nachrufe in verschiedenen Zeitungen
Quantum Phase Transitions Between Bosonic Symmetry Protected Topological States Without Sign Problem: Nonlinear Sigma Model with a Topological Term
Creators: name: You, Yi-Zhuang
name: Bi, Zhen
name: Mao, Dan
name: Xu, Cenke
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a series of simple $2d$ lattice interacting fermion models that we demonstrate at low energy describe bosonic symmetry protected topological (SPT) states and quantum phase transitions between them. This is because due to interaction the fermions are gapped both at the boundary of the SPT states and at the bulk quantum phase transition, thus these models at low energy can be described completely by bosonic degrees of freedom. We show that the bulk of these models is described by a Sp($N$) principal chiral model with a topological $Θ$-term, whose boundary is described by a Sp($N$) principal chiral model with a Wess-Zumino-Witten term at level-1. The quantum phase transition between SPT states in the bulk is tuned by a particular interaction term, which corresponds to tuning $Θ$ in the field theory, and the phase transition occurs at $Θ= π$. The simplest version of these models with $N=1$ is equivalent to the familiar O(4) nonlinear sigma model (NLSM) with a topological term, whose boundary is a $(1+1)d$ conformal field theory with central charge $c = 1$. After breaking the O(4) symmetry to its subgroups, this model can be viewed as bosonic SPT states with U(1), or $Z_2$ symmetries, etc. All these fermion models including the bulk quantum phase transitions can be simulated with determinant Quantum Monte Carlo method without the sign problem. Recent numerical results strongly suggests that the quantum disordered phase of the O(4) NLSM with precisely $Θ= π$ is a stable $(2+1)d$ conformal field theory (CFT) with gapless bosonic modes.
description: 10 pages, 3 figures
title: Standardisation of diffusion weighted MRI technique in characterisation of cervical lymphadenopathy
Creators: name: Atta, Haisam
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Head and neck
subject: MR-Diffusion/Perfusion
subject: Acceptance testing
subject: Lymphoma

description: Purpose Methods and materials Results Conclusion Personal information References
description: Purpose: Introduction: Early identification and accurate staging of lymph node metastases is a challenging problem for the radiologist as it has an impact on prognosis, treatment and follow-up of oncological patients. 1-3 Diffusion weighted MRI role in the...
title: To describe the MRI features of acute and chronic hypertensive encephalopathies.
Creators: name: Gibney, Brian
Publisher: name: European Congress of Radiology
Year: 2016
Subjects: subject: Imaging sequences
subject: MR
subject: Neuroradiology brain
subject: CNS
subject: Hypertension

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To become familiar with the the acute and chronicCNS sequelae of hypertension. To be able to recognisethese pathological processes on...
Vorschau / Impressum
Creators: name: Redaktion, Die
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 12 (2001): Der Antike Sudan
title: Mentre tu dormivi: Traghetti e pendolari in British Columbia [While you were asleep: Ferries and commuters in British Columbia]
Creators: name: Vannini, Phillip
Publisher: name: Lo Squaderno: Explorations in Space and Society
Year: 2014
Subjects: Ferries
Commuters
British Columbia

description: Italian and English translation. This article is published under Creative Commons license CC BY 3.0. The definitive version of record is available at http://www.losquaderno.professionaldreamers.net/?cat=165
description: Cultural critics have made of the commuter a modern popular culture stereotypical figure, characterized by habitual and automatic behavior. Tied to a security belt, hidden behind a newspaper, stuck inside a train coach, and linked to a cellphone or iPod, the commuter is apparently deprived of sensations, emotions, sense of place, endlessly trapped in the whirl of translocal flows. Such image is undoubtedly superficial. Recently, everyday movement practices have attracted the attention of mobility researchers. An interdisciplinary study of the intersections between bodily and virtual movement of people, objects, and information has developed (Adey 2010). The study of mobility has began to spread light on subjectivities, experiences, and the mundane practices of travellers (such as commuters) with the aim to overcome the commonsensical idea that transit zones (ranging from airport terminals to highways) are spaces without meaningful interaction. With this piece, I seek to contribute to an ethno - graphic study of mobility. More specifically, whereas a large part of research carried out so far has privileged transport means like cars, trains and buses, i turn to a relatively neglected means of mobility: ferries. Drawing on an three-year ethnography among island and seaside communities of British Columbia, Canada (Vannini, 2012), I have interpreted the experiences and practices of commuters’ everyday mobility as active space and time performances.