bluuebunny/crossref_metadata_2025_split huggingface dataset:
Internal shocks from variable outflows in classical novae
Authors: Steinberg Elad , Metzger Brian D 
Published: November 2019

ABSTRACT
We present one-dimensional hydrodynamical simulations including radiative losses, of internal shocks in the outflows from classical novae, to explore the role of shocks in powering multiwavelength emission from radio to gamma-ray wavelengths. Observations support a picture in which the initial phases of some novae generate a slow, equatorially focused outflow (directly from the outer Lagrange point, or from a circumbinary disc), which then transitions to, or is overtaken by, a faster more isotropic outflow from the white dwarf which collides and shocks the slower flow, powering gamma-ray and optical emission through reprocessing by the ejecta. However, the common occurrence of multiple peaks in nova light curves suggests that the outflow’s acceleration need not be monotonic, but instead can involve successive transitions between ‘fast’ and ‘slow’ modes. Such a time-fluctuating outflow velocity naturally can reproduce several observed properties of nova, such as correlated gamma-ray and optical flares, expansion of the photosphere coincident with (though lagging slightly) the peak flare luminosity, and complex time evolution of spectral lines (including accelerating, decelerating, and merging velocity components). While the shocks are still deeply embedded during the gamma-ray emission, the onset of ∼keV X-ray and ∼10 GHz radio synchrotron emission is typically delayed until the forward shock of the outermost monolithic shell (created by merger of multiple internal shock-generated shells) reaches a sufficiently low column through the dense external medium generated by the earliest phase of the outburst.
VLT/SINFONI study of black hole growth in high-redshift radio-loud quasars from the CARLA survey
Authors: Marinello M , Overzier R A , Röttgering H J A , Kurk J D , De Breuck C , Vernet J , Wylezalek D , Stern D , Duncan K J , Hatch N , Kashikawa N , Lin Y-T , Nemmen R S , Saxena A 
Published: November 2019

ABSTRACT
We present Very Large Telescope/Spectrograph for INtegral Field Observations in the Near Infrared (VLT/SINFONI) observations of 35 quasars at 2.1 &lt; z &lt; 3.2, the majority of which were selected from the Clusters Around Radio-Loud AGN (CARLA) survey. CARLA quasars have large C iv-based black hole masses (MBH &gt; 109 M⊙) and powerful radio emission ($P_{500\, \rm MHz}$ &gt; 27.5 W Hz−1). We estimate H α-based MBH, finding a scatter of 0.35 dex compared to C iv. We evaluate several recipes for correcting C iv-based masses, which reduce the scatter to 0.24 dex. The radio power of the radio-loud quasars is at most weakly correlated with the interconnected quantities H αwidth, L5100, and MBH, suggesting that it is governed by different physical processes. However, we do find a strong inverse correlation between C iv blueshift and radio power linked to higher Eddington ratios and L5100. Under standard assumptions, the black hole (BH) growth time is longer than the cosmic age for many CARLA quasars, suggesting that they must have experienced more efficient growth in the past. If these BHs were growing from seeds since the epoch of reionization, it is possible that they grew at the Eddington limit like the quasars at z ∼ 6–7, and then continued to grow at the reduced rates observed until z ∼ 2–3. Finally, we study the relation between MBH and environment, finding a weak positive correlation between MBH and galaxydensity measured by CARLA.
Computing the small-scale galaxy power spectrum and bispectrum in configuration space
Authors: Philcox Oliver H E , Eisenstein Daniel J 
Published: November 2019

ABSTRACT
We present a new class of estimators for computing small-scale power spectra and bispectra in configuration space via weighted pair and triple counts, with no explicit use of Fourier transforms. Particle counts are truncated at $R_0\sim 100\, h^{-1}\, \mathrm{Mpc}$ via a continuous window function, which has negligible effect on the measured power spectrum multipoles at small scales. This gives a power spectrum algorithm with complexity $\mathcal {O}(NnR_0^3)$ (or $\mathcal {O}(Nn^2R_0^6)$ for the bispectrum), measuring N galaxies with number density n. Our estimators are corrected for the survey geometry and have neither self-count contributions nor discretization artefacts, making them ideal for high-k analysis. Unlike conventional Fourier-transform-based approaches, our algorithm becomes more efficient on small scales (since a smaller R0 may be used), thus we may efficiently estimate spectra across k-space by coupling this method with standard techniques. We demonstrate the utility of the publicly available power spectrum algorithm by applying it to BOSS DR12 simulations to compute the high-k power spectrum and its covariance. In addition, we derive a theoretical rescaled-Gaussian covariance matrix, which incorporates the survey geometry and is found to be in good agreement with that from mocks. Computing configuration- and Fourier-space statistics in the same manner allows us to consider joint analyses, which can place stronger bounds on cosmological parameters; to this end we also discuss the cross-covariance between the two-point correlation function and the small-scale power spectrum.
Estimating trajectories of meteors: an observational Monte Carlo approach – II. Results
Authors: Vida Denis , Brown Peter G , Campbell-Brown Margaret , Wiegert Paul , Gural Peter S 
Published: November 2019

ABSTRACT
In the first paper of this series, we examined existing methods of optical meteor trajectory estimation and developed a novel method which simultaneously uses both the geometry and the dynamics of meteors to constrain their trajectories. We also developed a simulator which uses an ablation model to generate realistic synthetic meteor trajectories which we use to test meteor trajectory solvers. In this second paper, we perform simulation validation to estimate radiant and velocity accuracy, which may be achieved by various meteor observation systems as applied to several meteor showers. For low-resolution all-sky systems, where the meteor deceleration is generally not measurable, the multi-parameter fit method assuming a constant velocity better reproduces the radiant and speed of synthetic meteors. For moderate field of view systems, our novel method performs the best at all convergence angles, while multi-parameter fit methods generally produce larger speed errors. For high-resolution, narrow field of view systems, we find our new method of trajectory estimation reproduces radiant and speed more accurately than all other methods tested. The ablation properties of meteoroids are commonly found to be the limiting factor in velocity accuracy. We show that the true radiant dispersion of meteor showers can be reliably measured with moderate field of view (or more precise) systems provided appropriate methods of meteor trajectory estimation are employed. Finally, we compare estimated and real angular radiant uncertainty and show that for the solvers tested the real radiant error is on average underestimated by a factor of two.
Increased risk of developing peripheral artery disease in hemodialysis patients receiving statin treatments: a population-based cohort study in Taiwan
Authors: Hsu Yueh-Han , Sung Fung-Chang , Muo Chih-Hsin , Chuang Shao-Yuan , Chen Chun-Ming , Hsu Chung Y , Hsu Chih-Cheng 
Published: November 2019

AbstractBackgroundFew investigations have evaluated the influences on peripheral arterial disease (PAD) risk of statin treatment in hemodialysis (HD) subjects with hyperlipidemia (HL).MethodsFrom the National Health Insurance Research Dataset, we identified 3658 HD patients with statin therapy for HL as the statin cohort, and then selected, by 1:1 propensity score matching, 3658 HD patients with HL but without statin use as the nonstatin cohort in 2000–07. The cohorts were followed through until the end of 2011. We used Cox proportional hazards regression analysis to assess the hazard ratio (HR) of PAD development.ResultsThe average follow-up period was 4.18 years; the incident PAD risk was 1.35-fold greater in statin users than in nonusers (16.87 versus 12.46/1000 person-years), with an adjusted HR (aHR) of 1.34 for PAD [95% confidence interval (CI) 1.12–1.62]. The PAD risk increases were significant for patients receiving fluvastatin (aHR 1.88; 95% CI 1.12–3.14) and atorvastatin (aHR 1.60; 95% CI 1.24–2.08). The risk increased with higher annual average statin dosage (P for trend &lt;0.0001); the risk was higher for those receiving moderate-intensity statin treatment. The sensitivity test revealed similar findings.ConclusionsHD patients with HL on statin medication were at increased PAD risk, which increased with cumulative statin dosage. Thorough considerations are needed before prescribing statins to HD patients.
Cytomegalovirus ventriculoencephalitis presenting with hydrocephalus in a patient with advanced HIV infection
Authors: John Kevin John , Gunasekaran Karthik , Sultan N , Iyyadurai Ramya 
Published: November 2019

Abstract
A 38-year-old lady with advanced human immunodeficiency virus (HIV) infection presented to the emergency department with headache, vomiting and fluctuating alertness for 3 weeks. On examination, she had tachycardia, bilateral papilledema, restriction of upward gaze, gaze-evoked nystagmus and signs of meningeal irritation. Magnetic resonance imaging of the brain showed hydrocephalus and periventricular high T2-signal regions with restriction on diffusion-weighted imaging. Polymerase chain reaction done on the cerebrospinal fluid obtained after the insertion of an external ventricular drain was positive for cytomegalovirus (CMV). She was treated with intravenous ganciclovir followed by oral valganciclovir with which she made a dramatic recovery. CMV ventriculoencephalitis can present with hydrocephalus in HIV-infected individuals. A high index of suspicion must be maintained to diagnose this disease and start appropriate therapy on time.
Alveolar rhabdomyosarcoma with unusual cytogenetic findings: one more case and review of the literature
Authors: Ioannou Maria , Perivoliotis Konstantinos , Zaharos Nikolaos-Marios , Tsanakas Athanasios , Tepetes Konstantinos , Koukoulis George 
Published: November 2019

Abstract
Alveolar rhabdomyosarcoma (ARMS), a histological subtype of rhabdomyosarcoma (RMS), is characterized by an unfavorable clinical outcome. In most ARMS cases, an indicative chromosomal alteration is identified. The recurrent translocation of FKHR with either PAX3 or PAX7 genes results in the encoding of chimeric transcription factors that boost tumorigenesis. Besides structural mutations, the copy number of these genes also contributes to the oncogenic activity. In our case, a 12-year-old female patient was diagnosed with a 4 cm pelvic mass. Histopathological examination indicated an alveolar type of RMS. Subsequent FISH analysis with a dual color break-apart probe identified positive signals of FKHR3 gene break, as well as the rare event of a synchronous aneuploidy and gene deletion of FKHR. Our findings lead to the conclusion that a systematic break-apart probe FKHR FISH analysis in ARMS, confirms the diagnosis and elucidates the full spectrum of genomic alterations of this malignancy.
Thriving, not just surviving, with motor neurone disease. The outcome of the first pre-emptive ‘triple-ostomy’
Authors: Russell Thomas , Paul Daniel , Scott-Morgan Peter , Wright Maree , Kenefick Nick 
Published: November 2019

Abstract
The following report details the multidisciplinary treatment of a patient with motor neurone disease. The patient, who requested publication of this case, is a highly intelligent and distinguished robotic scientist. He was diagnosed with amyotrophic lateral sclerosis in 2017 and his personal approach to his condition has been to use modern technology and all treatment options to maximise his quality and duration of life. After his research, the patient decided that his life would be significantly improved by formation of an elective ‘triple-ostomy’, this being an end colostomy and suprapubic catheter (for continence), and a percutaneous gastrostomy (for nutrition). We report the peri-operative multidisciplinary approach taken with this case, the surgical procedures, the potential risks and the outcome. The patient is delighted with the result and aims to raise awareness that this may be a treatment option in highly selected patients.
Varieties of Feminisms in Contemporary China: Local Reception and Reinvention of Liberal Feminism in Ford Foundation Projects
Authors: Yang R 
Published: November 2019

AbstractThis article explores how liberal feminism has been received and hybridized with local feminisms in post-socialist China. Based on interviews and documents from four Ford Foundation projects, the results show how local actors appropriated elements from three strands of feminism: liberal, socialist, and cultural. Conflicts among these strands were reconciled by de-emphasizing the structural origins of gender inequality and putting impetus for change on individual women. The human rights-based understandings of gender equality are thereby converted into women’s obligation to improve their “quality” and exercise their legal rights, which ignores intersectional disadvantages confronting rural women.
Craniodental and Postcranial Characters of Non-Avian Dinosauria Often Imply Different Trees
Authors: Li Yimeng , Ruta Marcello , Wills Matthew A 
Published: November 2019

AbstractDespite the increasing importance of molecular sequence data, morphology still makes an important contribution to resolving the phylogeny of many groups, and is the only source of data for most fossils. Most systematists sample morphological characters as broadly as possible on the principle of total evidence. However, it is not uncommon for sampling to be focused on particular aspects of anatomy, either because characters therein are believed to be more informative, or because preservation biases restrict what is available. Empirically, the optimal trees from partitions of morphological data sets often represent significantly different hypotheses of relationships. Previous work on hard-part versus soft-part characters across animal phyla revealed significant differences in about a half of sampled studies. Similarly, studies of the craniodental versus postcranial characters of vertebrates revealed significantly different trees in about one-third of cases, with the highest rates observed in non-avian dinosaurs. We test whether this is a generality here with a much larger sample of 81 published data matrices across all major dinosaur groups. Using the incongruence length difference test and two variants of the incongruence relationship difference test, we found significant incongruence in about 50% of cases. Incongruence is not uniformly distributed across major dinosaur clades, being highest (63%) in Theropoda and lowest (25%) in Thyreophora. As in previous studies, our partition tests show some sensitivity to matrix dimensions and the amount and distribution of missing entries. Levels of homoplasy and retained synapomorphy are similar between partitions, such that incongruence must partly reflect differences in patterns of homoplasy between partitions, which may itself be a function of modularity and mosaic evolution. Finally, we implement new tests to determine which partition yields trees most similar to those from the entire matrix. Despite no bias across dinosaurs overall, there are striking differences between major groups. The craniodental characters of Ornithischia and the postcranial characters of Saurischia yield trees most similar to the “total evidence” trees derived from the entire matrix. Trees from these same character partitions also tend to be most stratigraphically congruent: a mutual consilience suggesting that those partitions yield more accurate trees. [Dinosauria; homoplasy; partition homogeneity.]
Prospective assessment of contralateral prophylactic mastectomy decision-making in women with average risk: an application of perceptual mapping
Authors: Greener Judith R , Bass Sarah B , Alhajji Mohammad , Gordon Thomas F 
Published: November 2019

Abstract
Women with early-stage unilateral breast cancer and no familial or genetic risk factors are increasingly electing contralateral prophylactic mastectomy (CPM), despite the lack of evidence demonstrating improved outcomes. To better understand and extend the literature focused on treatment decision-making, a survey was conducted among women with early-stage breast cancer and no associated risk factors, who were in the process of making a surgical decision. This prospective study sought to expand our understanding of the factors that influence patients’ decision to have CPM, with the goal of providing healthcare providers with useful guidance in supporting breast cancer patients who are making treatment decisions. Data were collected for this prospective study through an internet survey. Results were analyzed using perceptual mapping, a technique that provides visual insight into the importance of specific variables to groups of women making different surgical decisions, not available through conventional analyses. Results suggest that women more likely to elect CPM demonstrate greater worry about breast cancer through experiences with others and feel the need to take control of their health through selection of the most aggressive treatment option. The information obtained offers guidance for the development of targeted intervention and counsel that will support patients’ ability to make high quality, informed decisions.
‘The most common grass, rush, moss, fern, thistles, thorns or vilest weeds you can find’: James Petiver's plants
Authors: Jarvis Charles E. 
Published: November 2019

The dried plant specimens painstakingly acquired by the London apothecary James Petiver (
ca
1663–1718) from around the world constitute a substantial, but underappreciated, component of the vast herbarium of Sir Hans Sloane, now housed at London's Natural History Museum. Petiver was an observant field biologist whose own collecting was focused in south-east England. However, he also obtained specimens from an astoundingly wide geographical area via numerous collectors, more than 160 of whose names are known. While many were wild-collected, gardens in Great Britain and abroad also played a role in facilitating the study of the many new and strange exotics that were arriving in Europe. A new estimate of the number of specimens present in Petiver's herbarium suggests a figure of
ca
21 000 gatherings. In this article, the appearance of the bound volumes, and the arrangement of the specimens within them, is assessed and contrasted with those volumes assembled by Leonard Plukenet and Hans Sloane. Petiver's published species descriptions and illustrations are shown to be frequently associated with extant specimens, letters and other manuscripts, making the whole a rich archive for the study of early modern collecting of natural curiosities at a time of increasing ‘scientific’ purpose.
Reproductive Factors and Risk of Breast Cancer by Tumor Subtypes among Ghanaian Women: A Population-based Case-control Study
Authors: Figueroa Jonine D , Davis Lynn Brittny C , Edusei Lawrence , Titiloye Nicholas , Adjei Ernest , Clegg-Lamptey Joe-Nat , Yarney Joel , Wiafe-Addai Beatrice , Awuah Baffour , Duggan Maire A. , Wiafe Seth , Nyarko Kofi , Aitpillah Francis , Ansong Daniel , Hewitt Stephen M , Ahearn Thomas , Garcia-Closas Montserrat , Brinton Louise A 
Published: November 2019

AbstractBackgroundHigher proportions of early-onset and estrogen receptor (ER) negative cancers are observed in women of African ancestry than in women of European ancestry. Differences in risk factor distributions and associations by age at diagnosis and ER status may explain this disparity.MethodsWe analyzed data from 1,126 women (aged 18–74 years) with invasive breast cancer and 2,106 population controls recruited from three hospitals in Ghana from 2013 to 2015. Odds ratios (OR) and 95% confidence intervals (CI) were estimated for menstrual and reproductive factors using polytomous logistic regression models adjusted for potential confounders.ResultsAmong controls, medians for age at menarche, parity, age at first birth, and breastfeeding/pregnancy were 15 years, 4 births, 20 years, and 18 months, respectively. For women ≥ 50 years, parity and extended breastfeeding were associated with decreased risks: >5 births vs. nulliparous, OR 0.40 (95% CI 0.20–0.83) and 0.71 (95% CI 0.51–0.98) for ≥19 vs. <13 breastfeeding months/pregnancy, which did not differ by ER. In contrast, for earlier onset cases (<50 years) parity was associated with increased risk for ER-negative tumors (P-heterogeneity by ER = 0.02), which was offset by extended breastfeeding. Similar associations were observed by intrinsic-like subtypes. Less consistent relationships were observed with ages at menarche and first birth.ConclusionReproductive risk factor distributions are different from European populations but exhibited etiologic heterogeneity by age at diagnosis and ER status similar to other populations. Differences in reproductive patterns and subtype heterogeneity are consistent with racial disparities in subtype distributions.Key MessagesDistribution of intrinsic-like breast cancer subtypes among Ghanaian women are distinct compared to European ancestry populations, with a higher proportion of ER-negative subtypes at younger ages.Increasing number of births and extended breastfeeding were associated with reduced risk for both ER-positive and ER-negative subtypes among later-onset breast cancer cases (women age ≥50 years).Extended breastfeeding offset a direct association that we observed of multiparity with early-onset (women age <50 years) ER-negative breast cancers.Number of births and breastfeeding duration are much higher in Ghanaian women compared to women of European ancestry and African Americans, however the relationships with risk are consistent when assessed by molecular subtype.