bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of anti-heart failure therapy on diastolic function in children with single-ventricle circulations
Authors: Yim Deane L.S. , Jones Bryn O. , Alexander Peta M.A. , d’Udekem Yves , Cheung Michael M.H. 
Published: March 2015

AbstractBackgroundChildren with functionally univentricular circulations have chronic volume loading of the systemic ventricle, potentially affecting ventricular function. Medications including angiotensin-converting enzyme inhibitors and β-blockers are used to treat ventricular dysfunction, despite limited evidence of their efficacy in this population.ObjectiveTo determine the effects of angiotensin-converting enzyme inhibitors on elevated filling pressures in children with single ventricle physiology.MethodsWe performed a single-centre, retrospective review of patients with single ventricle physiology who underwent multiple cardiac catheterisations between 1991 and 2013. Study population comprised of patients who commenced or had optimised dosing of angiotensin-converting enzyme inhibitors between assessments in response to high ventricular filling pressures. Patients undergoing interventions influencing loading conditions between assessments were excluded.ResultsA total of 17 patients were identified, with dominant morphologic right ventricle in eight patients (47.1%). Among them, 11 (64.7%) were pre-Fontan and six (35.3%) were post-Fontan completion. Median inter-assessment interval was 9.4 months (range 7.3–19.1). There was a reduction in end-diastolic pressure from 13 to 10 mmHg (p=0.002), mean pulmonary artery pressure from 16 to 13 mmHg (p=0.049), and mean atrial pressure from 12 to 9 mmHg (p=0.001). There was one cardiac transplant, and there were no patient deaths at median follow-up after 31 months.ConclusionsWe observed a reduction in ventricular end-diastolic pressure, pulmonary artery pressure, and mean atrial pressure following treatment with angiotensin-converting enzyme inhibitors in patients with single ventricle physiology. Our study provides insights into the potential impact of anti-heart failure therapy in single ventricle circulations and calls for larger, controlled studies to assess for a therapeutic response.
Past and Current Tendencies in Technology-Based Music
Authors: Rudi Jøran 
Published: March 2015

This article will, in a broad sense, discuss technology-based music from its early radio beginnings to the current participation practices, and seek to place both technical and musical development within broader trends of social development. The introduction of new technologies in industry, composition, mediation and consumption has, in a lasting manner, changed the way most of us listen to, participate in and make use of music in our daily lives. Electronic aesthetics has finally, following a development of nearly a hundred years, started to fulfil its initial promise of becoming widely accepted and popular outside of the narrow circles of musical expertise – a ‘democratic’ music unhindered by the hierarchies of the fine arts in their different configurations. But has it really fulfilled the original promise? Is it rather not so that both the music and its promise have changed over the years?One thing is certain, our pre-adaption to aesthetic experiences has undergone extreme changes over the last twenty years or so. A paradigm shift brought about by digital media and distribution, as well as the networking of things, has directed large parts of humanity towards a new existence in the cross-section of technology and humanity, an existence where cyborgian qualities increase day by day.
A Review of Color Blindness for Microscopists: Guidelines and Tools for Accommodating and Coping with Color Vision Deficiency
Authors: Keene Douglas R. 
Published: March 2015

Abstract“Color blindness” is a variable trait, including individuals with just slight color vision deficiency to those rare individuals with a complete lack of color perception. Approximately 75% of those with color impairment are green diminished; most of those remaining are red diminished. Red-Green color impairment is sex linked with the vast majority being male. The deficiency results in reds and greens being perceived as shades of yellow; therefore red-green images presented to the public will not illustrate regions of distinction to these individuals. Tools are available to authors wishing to accommodate those with color vision deficiency; most notable are components in FIJI (an extension of ImageJ) and Adobe Photoshop. Using these tools, hues of magenta may be substituted for red in red-green images resulting in striking definition for both the color sighted and color impaired. Web-based tools may be used (importantly) by color challenged individuals to convert red-green images archived in web-accessible journal articles into two-color images, which they may then discern.
Remote access to treatment planning software for pre-registration radiation therapy education: a single-case feasibility study
Authors: Bridge Pete , Burrage Simon 
Published: March 2015

AbstractAimThis single-case feasibility study presents an undergraduate radiotherapy student’s experiences of remote access to University treatment planning software in place of on-site practical learning. With clinical sites increasingly utilising telemedicine there is interest in educational applications of this technology.Materials and methodsThis was an unplanned study with the student initiating remote access; additional tutor support was provided as requested. Subsequent discussion between the tutor and student formed the basis for the presented findings.ResultsA second-year student planned five assessment cases from home, supported by regular on-campus tutorials. The student saved a 2-hour journey per practical and gained additional planning practice time. Unit performance was 10% less than a previous Unit, but student satisfaction with the format was high.FindingsEducational remote access to treatment planning software is logistically feasible, although strict guidelines and formal tutor support is vital. Remote access can alleviate pressure on facilities and improve student time efficiency. Controlled and supported provision of remote access to planning software could enhance on-site practical teaching sessions for more mature independent learners. Further cohort-wide studies could clarify advantages, disadvantages and possible role of remote access for radiotherapy planning education.
Suppressing weed growth after wheat harvest with underseeded red clover in organic farming
Authors: Anderson Randy L. 
Published: March 2015

AbstractOrganic producers are seeking alternative tactics for weed control so that they can reduce their need for tillage. In this study, we examined cover crop strategies for suppressing weed growth after harvest of wheat. Three cover crop treatments, red clover (mammoth type), a mixture of oat and dry pea, and a control were compared. Treatments were established in both winter and spring wheat, resulting in six treatments arranged in a randomized complete block design. Red clover was underseeded in wheat by drilling in the spring, and the oat/pea mixture was planted in August. Oat was planted uniformly across all treatments in the following growing season. The red clover treatment effectively suppressed weeds, reducing post-harvest weed biomass, density of volunteer winter wheat, and seed production of downy brome by more than 99% compared with the control. Oat/pea was not effective for weed management, likely because of less fall growth and competition compared with red clover. Underseeding red clover did not affect winter wheat yield, but reduced spring wheat yield by 17%. Oat yield, however, was reduced by volunteer crop plants and downy brome infestations in all treatments. Underseeding clovers in winter wheat may effectively manage weeds and, if they winterkill, can replace the need for tillage to control weeds after wheat harvest.
The effect of Helium-enhanced stellar populations on the ultraviolet upturn phenomenon of early-type galaxies
Authors: Chung Chul , Yoon Suk-Jin , Lee Young-Wook 
Published: March 2015

AbstractWe present new population synthesis models (Chung et al.2011) for quiescent early-type galaxies (ETGs) with UV-upturn phenomenon using relatively metal-poor and helium-enhanced subpopulations in the model. We find that the presence of helium-enhanced subpopulations in ETGs can naturally reproduce the strong UV-upturns observed in giant elliptical galaxies (Figure 1. left panel), without invoking unrealistically old ages (Park & Lee 1997). Our models with helium-enhanced subpopulations also predict that the well-known Burstein relation can be explained by the fraction of helium-enhanced subpopulation, the mean age, and the mean metallicity of the underlying stellar populations (Figure 1. right panel).
Spatially resolved molecular gas in early-type galaxies
Authors: Davis T. A. , Alatalo K. , Bureau M. , Young L. , Blitz L. , Crocker A. , Bayet E. , Bois M. , Bournaud F. , Cappellari M. , Davies R. L. , Duc P-A. , de Zeeuw P. T. , Emsellem E. , Falcon-Barroso J. , Khochfar S. , Krajnovic D. , Kuntschner H. , Lablanche P.-Y. , McDermid R. M. , Morganti R. , Naab T. , Sarzi M. , Scott N. , Serra P. , Weijmans A. 
Published: March 2015

AbstractIn around ≈25% of early-type galaxies (ETGs) UV emission from young stellar populations is present. Molecular gas reservoirs have been detected in these systems (e.g. Young et al. (2011), providing the fuel for this residual star-formation. The environment in which this molecular gas is found is quite different than that in spiral galaxies however, with harsher radiation fields, deeper potentials and high metallicity and alpha-element abundances. Here we report on one element of our multi-faceted programme to understand the similarities and differences between the gas reservoirs in spirals and ETGs. We use spatially resolved observations from the CARMA mm-wave interferometer to investigate the size of the molecular reservoirs in the the CO-rich ATLAS3D ETGs (survey described in Alatalo et al. 2012, submitted). We find that the molecular gas extent is smaller in absolute terms in ETGs than in late-type galaxies, but that the size distributions are similar once scaled by the galaxies optical/stellar characteristic scale-lengths (Fig 1, left). Amongst ETGs, we find that the extent of the molecular gas is independent of the kinematic misalignment, despite the many reasons why misaligned gas might have a smaller extent. The extent of the molecular gas does depend on environment, with Virgo cluster ETGs having less extended molecular gas reservoirs (Fig 1, right). Whatever the cause, this further emphases that cluster ETGs follow different evolutionary pathways from those in the field. Full details of this work will be presented in Davis et al. (2012), submitted.
Star Formation History of Early-Type Galaxies with Tidal Debris in the S4G
Authors: Ramos Beatriz H. F. , Menéndez-Delmestre Karín , Kim Taehyun , Sheth Kartik ,   S4G team
Published: March 2015

AbstractLocal early-type galaxies (ETGs), despite typically being associated to old stellar populations and passive evolution, have been in some cases observed to present peculiarities in their stellar structure, like disks and shells (e.g., Kormendy et al.1997, Rix, Carollo & Freeman 1999). Moreover, it has been observed that ETGs with such tidal features may present UV emission (Rampazzo et al.2007, Salim & Rich 2010). These properties make them relevant constraints to galaxy formation models. We are analysing the structure of nearby ETGs observed in the Spitzer Survey of Stellar Structure in Galaxies (S4G; Sheth et al.2010), which comprises the largest mid-IR survey of galaxies in the local Universe. We perform a 2D GALFIT decomposition of the 3.6μm images of 146 ETGs and examine their residual images. We identify tidal features in 17% of these, suggesting that a non-negligible ETGs fraction may have experienced (after the formation of the bulk of their stellar budget) merger events that have left signatures (Canalizo et al.2007). For 6 of these peculiar ETGs, we also applied GALFIT decomposition to public GALEX/UV and SDSS/optical images. With measurements in multiple bands, we applied SED fitting techniques to estimate star formation rates (SFR) and stellar masses for the galaxies and their tidal features. We find that these 6 peculiar ETGs present masses in agreement with the population of non-peculiar ETGs. However, SFRs are higher than what has been measured for the average ETG population (Shapiro et al.2010, SDSS MPA-JHU catalog). Based on the Kaviraj (2010) relation, we find that for these peculiar ETGs the estimated age of the most recent star formation event is less than 3Gyrs. Despite this indication of recent star formation, we have not found evidence of prominent UV emission in the tidal features (Marino et al.2010). We are currently extending our work to the full sample of peculiar ETGs identified in our sample.
UV color-color relation of early-type galaxies
Authors: Ree Chang H. , Jeong Hyunjin , Oh Kyuseok , Chung Chul , Lee Joon Hyeop , Kim Sang Chul , Kyeong Jaemann 
Published: March 2015

AbstractThe ultraviolet (UV) color-color relation of early-type galaxies (ETGs) in the nearby universe (0.05 < z < 0.12) is re-examined with the latest GALEX GR6 and SDSS DR7 data. By drawing the FUV – NUV (as a measure of UV temperature) versus FUV – r (as a measure of UV amplitude) color-color diagram for the morphologically-cleaned, spectroscopically-cleaned sample of ~3700 quiescent ETGs, we find that the “old and dead“ ETGs consist of a well-defined sequence in UV colors, the “UV red sequence”, so that the stronger UV excess galaxies should have a harder UV spectral shape systematically. However, the observed UV spectral slope is too steep to be reproduced by the canonical models in which the UV flux is mainly controlled by age or metallicity parameters. The observed data support the helium enhancement scenario in which the UV spectral shape of UV upturn (FUV – NUV < 0.9; FUV – r ~ 6) galaxies may be governed by the minority population of helium-enhanced horizontal-branch (HB) stars.
Meteor Showers: which ones are real and where do they come from?
Authors: Jenniskens Peter 
Published: March 2015

AbstractThe IAU Meteor Shower Working List contains 369 showers, of which only 64 are considered established (per February 28, 2012). In this invited review, we will give an overview of international efforts to validate the remaining showers. We report on the showers that were validated in this triennium and proposed to receive the predicate “established" at the present General Assembly. The meteoroid orbit surveys characterize the meteoroid streams in terms of orbital elements and their dispersions, which is ground truth for efforts to identify their parent comets, study the fragmentation history of the (mostly dormant) comet population in the inner solar system, and understand the origin of the zodiacal cloud.
C/2002 VQ94 (LINEAR) and 29P/Schwassmann-Wachmann 1 - CO+ and N2+ rich comets
Authors: Ivanova Aleksandra , Korsun Pavlo , Afanasiev Viktor 
Published: March 2015

AbstractWe investigated comets active at large heliocentric distances using observations obtained at the 6-m BTA telescope (SAO RAS, Russia). Long-slit and photometric modes of the focal reducer SCORPIO were used. Two of the comets, 29P/Schwassmann-Wachmann 1 (SW1) and C/2002 VQ94 (LINEAR) were observed to be emission rich. Detection of CO+ and N2 + emissions in the comae of these comets is evidence that they were formed in the outer regions of the Solar System or in a pre-solar interstellar cloud in a low temperature environment with T ~ 25K. The ratio of N2+/CO+ is equal to 0.011 and 0.027 for SW1 and LINEAR, respectively. Comet LINEAR is the most distant object in the Solar System (7.332 AU) for which CO+ and N2+ are measured. The photometric maximum of the isolated CO+ coma in comet LINEAR is shifted by 1.4 arcsec (7.44 × 103 km) relative to the photometric maximum of the dust coma. This shift deviates from the sunward direction by 63 degrees.
Connecting terrestrial to celestial reference frames
Authors: Malkin Z. 
Published: March 2015

AbstractIn this paper we outline several problems related to the realization of the international celestial and terrestrial reference frames — the ICRF and ITRF — at the millimeter level of accuracy, with emphasis on ICRF issues. We consider here the current status of the ICRF, the interrelationship between the ICRF and ITRF, and considerations for future ICRF realizations.
Multiple Stellar Populations: the evolutionary framework
Authors: Cassisi Santi 
Published: March 2015

AbstractIn these last years a huge amount of both spectroscopical and photometric data has provided a plain evidence of the fact that Galactic globular clusters (GCs) host various stellar sub-populations characterized by peculiar chemical patterns. The need of properly interpreting the various observational features observed in the Color-Magnitude Diagrams (CMDs) of these stellar systems requires a new generation of stellar models properly accounting for these chemical peculiarities both in the stellar model computations and in the color - Teff transformations. In this review we discuss the evolutionary framework that is mandatory in order to trace the various sub-populations in any given GC.
Dynamics of Multiple Stellar Populations in Globular Clusters
Authors: Vesperini Enrico , McMillan Steve , D'Antona Franca , D'Ercole Annibale 
Published: March 2015

AbstractThe results of numerous spectroscopic and photometric studies have revealed the presence of multiple stellar populations in many globular clusters. In this paper we summarize the results of our recent studies on the dynamical evolution of multiple-population clusters, the implications of the structural properties of multiple-population clusters for the evolution of binary stars, and the possible contribution of globular clusters to the assembly of the Galactic halo.
Physical processes for the origin of globular clusters with multiple stellar populations
Authors: Bekki Kenji 
Published: March 2015

AbstractWe numerically investigate the formation processes of globular clusters (GCs) in gas-rich dwarf galaxies at high redshifts. Our particular focus is on how the first and second generations of stars can be formed from high-density gas clouds in dwarf galaxies. We find that massive stellar clumps first form from massive gas clumps that are developed from local gravitational instability in gas-rich dwarfs. These stellar clumps with masses larger than ~ 2 × 106 M⊙ can finally become the first generation of stars in GCs. After supernova explosion expels the remaining gas in the clumps, stars can form from eject of AGB stars that is accreted onto the central regions of the clumps (i.e., first generation of stars). The compact clusters of these stars have much higher densities and a significant amount of internal rotation (~ 5 km s−1) in comparison with the first generation and thus correspond to the second generation.
The Galactic halo: stellar populations and their chemical properties
Authors: Norris John E. 
Published: March 2015

AbstractBelow [Fe/H] = −3.0, there is an enormous range in [C/Fe]. We discuss the properties of C-rich ([C/Fe] > +0.7) and C-normal ([C/Fe] ≤ +0.7) stars in this regime, and suggest that there existed two different gas cooling channels in the very early Universe.
Special Session 2: Cosmic Evolution of Groups and Clusters
Authors: Vrtilek J. M. , David L. P. 
Published: March 2015

AbstractDuring the past decade observations across the electromagnetic spectrum have led to broad progress in the understanding of galaxy clusters and their far more abundant smaller siblings, groups. From the X-rays, where Chandra and XMM have illuminated old phenomena such as cooling cores and discovered new ones such as shocks, cold fronts, bubbles and cavities, through rich collections of optical data (including vast and growing arrays of redshifts), to the imaging of AGN outbursts of various ages through radio observations, our access to cluster and group measurements has leaped forward, while parallel advances in theory and modeling have kept pace.This Special Session offered a survey of progress to this point, an assessment of outstanding problems, and a multiwavelength overview of the uses of the next generation of observatories. Holding the symposium in conjuction with the XXVIIIth General Assembly provided the significant advantage of involving not only a specialist audience, but also interacting with a broad cross-section of the world astronomical community.
Bar properties as seen in the Spitzer Survey of Stellar Structure in Galaxies
Authors: Sheth Kartik ,   The Spitzer Survey for Stellar Structure in Galaxies (S4G) Team
Published: March 2015

AbstractBars serve a crucial signpost in galaxy evolution because they form quickly once a disk is sufficiently massive and dynamically cold. Although the bar fraction in the local Universe is well-established since the mid-60s, a variety of studies have concluded varying bar fractions due to different definitions of bars, use of low quality data or different sample selection. The Spitzer Survey of Stellar Structure in Galaxies (S4G) offers us the ideal data set for resolving this outstanding issue once and for all. S4G consists of over 2000 nearby galaxies chosen based on optical brightness, distance, galactic latitude and size in a 40 Mpc volume. With a 4 minute integration time per pixel over >1.5 × D25 diameter for each galaxy, the data provide the deepest, homogenous, mid-infrared (3.6 and 4.5 microns) data on the nearby Universe. The data are so deep that we are tracing stellar surface densities << 1 solar mass per square parsec. With these data we can confidently constrain the bar fraction and thus shed important light on the evolutionary state of galaxies as a function of mass, environment and other galaxy host properties.
NIRS0S: Observations of early-type galaxy secular evolution spanning the Sa/S0/disky-E boundaries
Authors: Laurikainen Eija , Salo Heikki , Buta Ronald , Knapen Johan 
Published: March 2015

AbstractNIRS0S (Near-IR S0 galaxy Survey), is a K-band survey of ~ 200 early-type disk galaxies, mainly S0s, 2-3 mag deeper than the 2Micron All Sky Survey. In depth morphological analysis was done, in which multi-component structural decompositions played an important role. Possible implications to internal dynamical galaxy evolution were discussed. S0s were suggested to be former spirals in which star formation has ceased, forming a parallel sequence with spirals (see Fig. 1). If that evolution is faster among the brighter galaxies, the observed magnitude difference between the barred and non-barred S0s could be understood. Bars are suggested to play a critical role in such evolution. For example, the inner lenses in the bright non-barred S0s can be explained as former barlenses (inner parts of bars), in which the elongated bar component has dissolved. We suggest that the last destructive merger event happened at a fairly large redshift.
The role of external gas accretion on galaxy transformations, and evidence of such accretion
Authors: Combes Françoise 
Published: March 2015

AbstractContinuously accreting matter from cosmic filaments is one of the main way to assemble mass for galaxies (Keres et al.2005, Dekel et al.2009). This external accretion accelerates secular processes, and maintain star formation, but also bar and spiral formation (Bournaud & Combes 2002), and consequent radial migration. Secular evolution may alleviate the problem of too massive bulge formation in the standard LCDM hierarchical scenario. Inside out formation of galaxies may account for the evolution of the size-mass relation and evolution with redshift. I will show how gas accretion from the inter galactic medium can mimick perturbations due to galaxy interactions (cf Figure 1), and I will describe evidence of such accretion, through warps, polar rings or damped Lyman-α systems.