bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lewis Number Effects on Flame Speed Statistics in Spherical Turbulent Premixed Flames
Authors: Ozel-Erol G. , Klein M. , Chakraborty N. 
Published: June 2020

AbstractThe influences of characteristic Lewis number$$ \hbox{Le} $$Leon the statistics of density-weighted displacement speed and consumption speed in spherically expanding turbulent premixed flames have been analysed using three-dimensional direct numerical simulations data for$$ \hbox{Le} = 0.8 $$Le=0.8, 1.0 and 1.2 under statistically similar flow conditions. It has been found that the extents of flame wrinkling and burning increase with decreasing$$ \hbox{Le} $$Le, which is reflected in increasing trends of mean and most probable values of both density-weighted displacement and consumption speed. Moreover, in all cases the marginal probability density functions of density-weighted displacement speed show finite probabilities of obtaining negative values, whereas consumption speed remains deterministically positive. The strain rate and curvature dependences of scalar gradient and temperature have been found to be strongly dependent on$$ \hbox{Le} $$Le, and these statistics, along with the interrelation between strain rate and curvature, influence the local strain rate and curvature responses of consumption speed and both reaction and normal diffusion components of density-weighted displacement speed. Density-weighted displacement speed and curvature have been found to be negatively correlated, whereas positive correlations are obtained between density-weighted displacement speed and tangential strain rate for all flames considered here. The positive correlation between temperature and curvature arising from differential diffusion of heat and mass in the$$ \hbox{Le} = 0.8 $$Le=0.8case induces a positive correlation between consumption speed and curvature, whereas these correlations are negative in the$$ \hbox{Le} = 1.2 $$Le=1.2flame. The statistical behaviour of density-weighted displacement speed has been utilised to demonstrate that Damköhler’s first hypothesis does not strictly hold for spherically expanding turbulent premixed flames.
A Cultural Sociology of Populism
Authors: Morgan Marcus 
Published: June 2020

AbstractThis article interrogates dominant definitions of “populism” found in the social sciences, focusing on the term’s conceptual utility in understanding recent changes in Western polities. Though populism is typically treated as a deviant form of politics, this article finds that it in fact holds remarkable continuities with conventional politics, and indeed culture more generally. It argues that these more general cultural processes can be illuminated by cultural sociology, just as the more specific but still routine political processes can be illuminated by Civil Sphere Theory (CST). The article goes on to argue that when populism is understood as a formal mode of public signification, rather than a substantive ideology, the substance it signifies becomes crucial to determining its civility. It suggests that while populism can certainly have anti-civil effects, there is nothing inherent in it that precludes it from also acting to promote civil repair.
Background Subtraction using Adaptive Singular Value Decomposition
Authors: Reitberger Günther , Sauer Tomas 
Published: June 2020

AbstractAn important task when processing sensor data is to distinguish relevant from irrelevant data. This paper describes a method for an iterative singular value decomposition that maintains a model of the background via singular vectors spanning a subspace of the image space, thus providing a way to determine the amount of new information contained in an incoming frame. We update the singular vectors spanning the background space in a computationally efficient manner and provide the ability to perform blockwise updates, leading to a fast and robust adaptive SVD computation. The effects of those two properties and the success of the overall method to perform a state-of-the-art background subtraction are shown in both qualitative and quantitative evaluations.
Surgical treatment of aggressive pituitary adenomas and pituitary carcinomas
Authors: Buchfelder Michael , Schlaffer Sven-Martin 
Published: June 2020

AbstractSurgery of aggressive pituitary adenomas and pituitary carcinomas is part of the interdisciplinary management of these difficult to treat tumors. Invasion, giant size and unusual, asymmetric extent of these tumors frequently require modifications or extensions of the standard approaches for transsphenoidal and transcranial surgery. Frequently, only debulking procedures can be performed. In aggressive and hormone secreting adenomas, the remission rates achieved by surgery alone are relatively poor and adjuvant medical treatments or irradiation are needed. Safe resection of as much tumor as possible and symptomatic control is aimed at, rather than remission. Many procedures are required for rapid progression of lesions or recurrences, in order to extend the survival of the patients. Metastases of pituitary carcinomas within the cranial cavity or spine can be attacked. Since they can occur anywhere in the brain or spinal canal they require the entire battery of neurosurgical approaches. Unfortunately, in this group of pituitary tumors, the complication rates are higher than in primary operations of enclosed adenomas. The respective techniques with their facilities and limitations are reviewed in this article.
Estimation of intergenerational mobility in small samples: evidence from German survey data
Authors: Kyzyma Iryna , Groh-Samberg Olaf 
Published: June 2020

AbstractUsing data from the German socio-economic panel, this paper provides new evidence on intergenerational mobility in Germany by focusing on intergenerational association in ranks—i.e. positions, which parents and children occupy in their respective income distributions. We find that the association of children’s ranks with ranks of their fathers is about 0.242 for individual labor earnings and it is higher for sons than for daughters. It is also higher in East Germany compared to West Germany. The results further show that rank-based measures of mobility are less sensitive than conventional measures of intergenerational income elasticity to different methodological and sample specification choices, such as the stages of the life cycle when incomes of children and parents are measured, the number of years for which incomes are considered, the treatment of zero values in income variables and the choice of annual versus hourly earnings. Moreover, they are more robust for sub-group comparisons of intergenerational mobility (e.g. across gender and region). This evidence suggests that, similarly to large administrative datasets, rank-based measures of intergenerational mobility perform better than elasticity-based measures in small samples based on survey data.
Long-term monitoring of the recruitment and dynamics of large wood in Kamienica Stream, Polish Carpathians
Authors: Mikuś Paweł , Wyżga Barłomiej 
Published: June 2020

AbstractStudies presenting long-term observations of the recruitment and mobility of large wood in mountain watercourses are scarce, but they can considerably contribute to the knowledge of river/riparian forest interactions and the assessment of flood hazard resulting from wood mobility during floods. Widespread dieback of riparian forest along the headwater course of Kamienica Stream in the Polish Carpathians, caused by bark beetle infestation of spruce trees, has raised concerns about potential increases of large wood recruitment to the stream and of the flood hazard to downstream valley reaches. In October 2009, 429 trees growing along three sections of the stream were tagged with numbered metal plates and monitored over 10 years to determine the timing and causes of their delivery to the channel and the lengths of their displacement during individual flood events. Moreover, in 2012 the mode of location of wood deposits and a degree of wood decay were determined in the second- to fourth-order stream reaches. The monitoring of tagged trees indicated that trees were recruited to the channel during highintensity meteorological and hydrological events, mostly as a result of bank erosion during floods or windthrow. With 22% of tagged trees recruited to the channel during 10 years, the rate of turnover of the riparian trees was estimated at 45 years. As the riparian area is overgrown with trees with ages up to ~160 years, the rate evidences substantial intensification of large wood recruitment to the channel in the recent period. Results of large wood inventory and the 10-year-long monitoring of tagged trees indicated variable mobility of large wood along the upper course of the stream. Wood mobility was negligible in the second-order stream reach, very small in the third-order reach, and greater, but still limited in the fourth-order reach. Wood is transported longer distances only during major floods. However, the advanced state of decay of most pieces leads to their disintegration during floods, precluding distant transport. Thus, large wood retained in the upper stream course does not constitute an important flood hazard to downstream, inhabited valley reaches.
Microbial Interaction Network Estimation via Bias-Corrected Graphical Lasso
Authors: Jiang Duo , Sharpton Thomas , Jiang Yuan 
Published: June 2020

AbstractWith the increasing availability of microbiome 16S data, network estimation has become a useful approach to studying the interactions between microbial taxa. Network estimation on a set of variables is frequently explored using graphical models, in which the relationship between two variables is modeled via their conditional dependency given the other variables. Various methods for sparse inverse covariance estimation have been proposed to estimate graphical models in the high-dimensional setting, including graphical lasso. However, current methods do not address the compositional count nature of microbiome data, where abundances of microbial taxa are not directly measured, but are reflected by the observed counts in an error-prone manner. Adding to the challenge is that the sum of the counts within each sample, termed “sequencing depth,” is an experimental technicality that carries no biological information but can vary drastically across samples. To address these issues, we develop a new approach to network estimation, called BC-GLASSO (bias-corrected graphical lasso), which models the microbiome data using a logistic normal multinomial distribution with the sequencing depths explicitly incorporated, corrects the bias of the naive empirical covariance estimator arising from the heterogeneity in sequencing depths, and builds the inverse covariance estimator via graphical lasso. We demonstrate the advantage of BC-GLASSO over current approaches to microbial interaction network estimation under a variety of simulation scenarios. We also illustrate the efficacy of our method in an application to a human microbiome data set.
Thermochemical equilibrium study of ash transformation during combustion and gasification of sewage sludge mixtures with agricultural residues with focus on the phosphorus speciation
Authors: Hannl Thomas Karl , Sefidari Hamid , Kuba Matthias , Skoglund Nils , Öhman Marcus 
Published: June 2020

AbstractThe necessity of recycling anthropogenically used phosphorus to prevent aquatic eutrophication and decrease the economic dependency on mined phosphate ores encouraged recent research to identify potential alternative resource pools. One of these resource pools is the ash derived from the thermochemical conversion of sewage sludge. This ash is rich in phosphorus, although most of it is chemically associated in a way where it is not plant available. The aim of this work was to identify the P recovery potential of ashes from sewage sludge co-conversion processes with two types of agricultural residues, namely wheat straw (rich in K and Si) and sunflower husks (rich in K), employing thermodynamic equilibrium calculations. The results indicate that both the melting behavior and the formation of plant available phosphates can be enhanced by using these fuel blends in comparison with pure sewage sludge. This enhanced bioavailability of phosphates was mostly due to the predicted formation of K-bearing phosphates in the mixtures instead of Ca/Fe/Al phosphates in the pure sewage sludge ash. According to the calculations, gasification conditions could increase the degree of slag formation and enhance the volatilization of K in comparison with combustion conditions. Furthermore, the possibility of precipitating phosphates from ash melts could be shown. It is emphasized that the results of this theoretical study represent an idealized system since in practice, non-equilibrium influences such as kinetic limitations and formation of amorphous structures may be significant. However, applicability of thermodynamic calculations in the prediction of molten and solid phases may still guide experimental research to investigate the actual phosphate formation in the future.
Are we generating more assessments without added value? Surgical trainees’ perceptions of and receptiveness to cross-specialty assessment
Authors: Burm Sarah , Sebok-Syer Stefanie S. , Van Koughnett Julie Ann , Watling Christopher J. 
Published: June 2020

Introduction Competency-based medical education (CBME) hinges on robust assessment. However, integrating regular workplace-based assessment within demanding and sometimes chaotic clinical environments remains challenging. Many faculty lack assessment expertise, and some programs lack the infrastructure and faculty numbers to fulfill CBME’s mandate. Recognizing this, we designed and implemented an assessment innovation that trains and deploys a cadre of faculty to assess in specialties outside their own. Specifically, we explored trainees’ perceptions of and receptiveness to this novel assessment approach.
Methods Within Western University’s Surgical Foundations program, 27 PGY‑1 trainees were formatively assessed by trained non-surgeons on a basic laparoscopic surgical skill. These assessments did not impact trainees’ progression. Four focus groups were conducted to gauge residents’ sentiments about the experience of cross-specialty assessment. Data were then analyzed using a thematic analysis approach.
Results While a few trainees found the experience motivating, more often trainees questioned the feedback they received and the practicality of this assessment approach to advance their procedural skill acquisition. What trainees wanted were strategies for improvement, not merely an assessment of performance.
Discussion Trainees’ trepidation at the idea of using outside assessors to meet increased assessment demands appeared grounded in their expectations for assessment. What trainees appeared to desire was a coach—someone who could break their performance into its critical individual components—as opposed to an assessor whose role was limited to scoring their performance. Understanding trainees’ receptivity to new assessment approaches is crucial; otherwise training programs run the risk of generating more assessments without added value.
Single-source-precursor synthesis and phase evolution of SiC-TaC-C ceramic nanocomposites containing core-shell structured TaC@C nanoparticles
Authors: Yu Zhaoju , Yang Yujing , Mao Kangwei , Feng Yao , Wen Qingbo , Riedel Ralf 
Published: June 2020

AbstractA novel single-source-precursor for SiC-TaC-C nanocomposites was successfully synthesized by the chemical reaction between a polycarbosilane (allylhydridopolycarbosilane, AHPCS) and tantalum(V) chloride (TaCl5), which was confirmed by Fourier transform infrared spectra (FTIR) measurement. After pyrolysis of the resultant single-source-precursors at 900 °C, amorphous ceramic powders were obtained. The 900 °C ceramics were annealed at different temperatures in the range of 1200–1600 °C to gain SiC-TaC-C nanocomposites. The phase evolution of ceramic nanocomposites was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results indicate that the TaC starts to crystallize at lower temperature than the β-SiC. It is particularly worth pointing out that the unique core-shell structured TaC@C nanoparticles werein-situformed and homogeneously distributed in the ceramic matrix after annealing at 1400 °C. Even at a high temperature of 1600 °C, the grain sizes of β-SiC and TaC are smaller than 30 nm, fulfilling the definition of nanocomposites. The present study related to SiC-TaC-C nanocomposites paves a new road for enriching ultra-high temperature ceramic family suitable for structural/functional applications in harsh environment.
Review of research on high-speed railway subgrade settlement in soft soil area
Authors: Zhou Shunhua , Wang Binglong , Shan Yao 
Published: June 2020

AbstractConstruction issues of high-speed rail infrastructures have been increasingly concerned worldwide, of which the subgrade settlement in soft soil area becomes a particularly critical problem. Due to the high compressibility and low permeability of soft soil, the post-construction settlement of the subgrade is extremely difficult to control in these regions, which seriously threatens the operation safety of high-speed trains. In this work, the significant issues of high-speed railway subgrades in soft soil regions are discussed. The theoretical and experimental studies on foundation treatment methods for ballasted and ballastless tracks are reviewed. The settlement evolution and the settlement control effect of different treatment methods are highlighted. Control technologies of subgrade differential settlement are subsequently briefly presented. Settlement calculation algorithms of foundations reinforced by different treatment methods are discussed in detail. The defects of existing prediction methods and the challenges faced in their practical applications are analyzed. Furthermore, the guidance on future improvement in control theories and technologies of subgrade settlement for high-speed railway lines and the corresponding challenges are provided.
Is the Motor Impairment in Attention Deficit Hyperactivity Disorder (ADHD) a Co-Occurring Deficit or a Phenotypic Characteristic?
Authors: Farran Emily K. , Bowler Aislinn , D’Souza Hana , Mayall Leighanne , Karmiloff-Smith Annette , Sumner Emma , Brady Daniel , Hill Elisabeth L. 
Published: June 2020

Abstract
Objectives
Motor difficulties are often reported in individuals with attention deficit hyperactivity disorder (ADHD). The aims of this study are to detail the motor profile of children with ADHD and to determine whether the motor impairment present in a large proportion of children with ADHD represents a phenotypic characteristic of ADHD or a co-occurring deficit.

Methods
Participants with ADHD (N = 51; age 8 to 15 years) and typically developing (TD) motor matched control children (N = 75; age 4 to 11 years) completed the largest battery of assessments of motor function that have been used with this population to date, as well as a measure of inhibition as a behavioural measure of ADHD characteristics. Parents/caregivers also completed questionnaires relating to ADHD symptomology and a retrospective report of their child’s motor milestone achievement.

Results
A motor deficit was observed in 47% of our ADHD sample. Few relationships were observed between ADHD core characteristics and motor competence. Furthermore, there was an uneven profile of motor performance across different motor tasks, relative to the TD children. Interestingly, it appears that motor milestone achievement is not delayed in ADHD.

Conclusions
Our findings suggest that the motor deficit observed in ADHD is not inherent to ADHD. The motor deficit observed in some children with ADHD does not represent a simple delay in development and is not observed in infancy with respect to reaching motor milestones.
Understanding current practice of opioid use disorder management in emergency departments across Canada: A cross-sectional study
Authors: Hoyeck Patricia , Wiercigroch David , Clarke Cara , Moineddin Rahim , Sheikh Hasan , Hulme Jennifer 
Published: June 2020

ABSTRACTObjectiveOpioid-related deaths are increasing at alarming rates in Canada, with a 34% increase from 2016 to 2017. Patients with opioid use disorder often visit emergency departments (ED), presenting an opportunity to engage patients in treatment. Buprenorphine-naloxone is first-line treatment for opioid use disorder, but current management in the ED is unknown. This study aimed to characterize opioid use disorder management in the ED.MethodsWe conducted a cross-sectional study of emergency physicians across Canada. A survey was circulated electronically to the Canadian Association of Emergency Physicians members. Participants were asked about their current management practices, satisfaction, and helpfulness of resources. SAS (version 9.4) was used for statistical analysis. We dichotomized Likert-scale responses to approximate relative risk ratios via a log binomial analysis.ResultsThe survey was completed by 179 participants for a response rate of 11.1%; 143 (79.9%) physicians treated patients with opioid use disorder more than once a week. Only 7% (n = 13) of respondents always/often gave buprenorphine in the ED. Referral to an addiction clinic where patients were seen quickly was deemed the most helpful (90.5%, n = 162). Physicians who reported satisfaction with opioid use disorder management were four times more likely to prescribe buprenorphine in the ED or as an outpatient script (RR = 4.41, CI = 2.33–8.33, p < 0.01; RR = 4.51, CI = 2.21–9.22, p < 0.01).ConclusionThis study found that buprenorphine is not frequently prescribed in the ED setting, which is incongruent with the 2018 guidelines. Care coordination and on-site support were helpful to ED physicians. Hospitals should use knowledge translation strategies to improve the care of patients with an opioid use disorder.
“Do Not Do Abroad What You Would Not Do at Home?”: An Exploration of the Rationales for Extraterritorial Criminal Jurisdiction over a State’s Nationals
Authors: MÉGRET FRÉDÉRIC 
Published: June 2020

AbstractCompared to universal jurisdiction, active nationality jurisdiction remains one of the least understood and written about forms of extraterritorial criminal jurisdiction. This article seeks to offer a normative account of the exercise of criminal jurisdiction by states over their nationals for crimes committed abroad such as sexual offences against minors, bribery of foreign public officials, or medical “circumvention” tourism. It highlights all of the reasons that militate against such assertions of jurisdiction as a matter of policy and law. It goes on to argue that the assertion of criminal jurisdiction over nationals for crimes committed abroad must be understood beyond its permissibility under international law as a modality that manifests the interests of the state of nationality, the territorial (host) state on occasion, the relevant individuals, and, increasingly, the international community.
Documenting the acquisition of indigenous languages
Authors: PYE Clifton 
Published: June 2020

AbstractThe outstanding property of human language is its diversity, and yet acquisition data is only available for three percent of the world's 6000+ spoken languages. Due to the rapid pace of language loss, it may not be possible to document how children acquire half of the world's indigenous languages in as little as two decades. This loss permanently diminishes the scope of acquisition theory by removing its empirical base. In the face of pervasive language loss, the question of how best to document the language of the last children to acquire indigenous languages assumes critical importance. A collaborative effort by researchers is required to identify the most efficient procedures for documenting children's language, and share them worldwide. This paper makes the case for documenting diversity and outlines steps needed to accomplish this goal.