bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flame retardant effect of lignin/carbon nanotubes/potassium carbonate composite coatings on cotton roving
Authors: Łukawski Damian , Grześkowiak Wojciech , Lekawa-Raus Agnieszka , Widelicka Małgorzata , Lisiecki Filip , Dudkowiak Alina 
Published: June 2020

AbstractA new composite flame retardant coating for cotton roving has been investigated. The proposed coating comprises natural lignin, pure carbon allotrope carbon nanotubes (CNTs) and non-toxic potassium carbonate (K2CO3). The series of complementary experiments, including thermogravimetric analysis, vertical burning in fire tube, limiting oxygen index (LOI) measurement and combustion in mass loss calorimeter enabled the formulation of an optimum composition including aqueous suspension with 1 wt% of CNTs, 1 wt% lignin (L) as well as 1 wt% of K2CO3. Applying L/CNT/K2CO3 on cotton roving increased LOI from 17.1 to 38.5%, decreased final mass loss and temperature during vertical burning from 100 to 78% and 457 to 190 °C, respectively. Moreover, peak heat release rate and total heat released dropped from 97.5 to 70.4 kW/m2 and from 4.2 to 1.6 MJ/m2, respectively . The above experiments supported by scanning electron microscopy and Raman spectroscopy allowed also the explanation of the complementary mechanisms responsible for the overall fire retardant effect.
Conceptualising Violence in Close Relationships: Discrepancies Between Police Conceptions and the Letter of the Law in Finland
Authors: Fagerlund Monica , Houtsonen Jarmo , Notko Marianne , Husso Marita 
Published: June 2020

AbstractThe focus in this Finland-based study is on violence in close relationships—a term that partly overlaps with the more commonly used ‘domestic violence’, ‘family violence’ and ‘intimate partner violence’. We demonstrate how police officers’ conceptualisations of such violence differ from how it is defined in relevant legal documents. The data consists of the Government Bill and legal text on the subject issued as part of a legal reform enacted in 2010, and of a qualitative sample of freelist responses from 79 police officers. We examined both sets of data using theory-driven directed content analysis and deriving from prevailing theoretical frameworks reflecting the family- and gender-based perspectives on violence. The results expose the predominance of a narrow definition of ‘family’ in police understandings of close relationships, but also a notably broad spectrum of conceptualisations of both physical and non-physical forms of violence. In contrast, the legal definition of a close relationship is broader and encompasses multiple types of relationships, whereas forms of violence are more strictly defined. These findings could explain some of the discrepancies between legal policies on violence in close relationships and police responses to it.
A framework for dependency estimation in heterogeneous data streams
Authors: Fouché Edouard , Mazankiewicz Alan , Kalinke Florian , Böhm Klemens 
Published: June 2020

AbstractEstimating dependencies from data is a fundamental task of Knowledge Discovery. Identifying the relevant variables leads to a better understanding of data and improves both the runtime and the outcomes of downstream Data Mining tasks. Dependency estimation from static numerical data has received much attention. However, real-world data often occurs as heterogeneous data streams: On the one hand, data is collected online and is virtually infinite. On the other hand, the various components of a stream may be of different types, e.g., numerical, ordinal or categorical. For this setting, we propose Monte Carlo Dependency Estimation (MCDE), a framework that quantifies multivariate dependency as the average statistical discrepancy between marginal and conditional distributions, via Monte Carlo simulations. MCDE handles heterogeneity by leveraging three statistical tests: the Mann–Whitney U, the Kolmogorov–Smirnov and the Chi-Squared test. We demonstrate that MCDE goes beyond the state of the art regarding dependency estimation by meeting a broad set of requirements. Finally, we show with a real-world use case that MCDE can discover useful patterns in heterogeneous data streams.
Epistemic Curiosity and Situational Interest: Distant Cousins or Identical Twins?
Authors: Schmidt Henk G. , Rotgans Jerome I. 
Published: June 2020

AbstractTo what extent are epistemic curiosity and situational interest different indicators for the same underlying psychological mechanism? To answer this question, we conducted two studies. In Study 1, we administered measures of epistemic curiosity and situational interest to 158 students from an all-boys secondary school. The data were analyzed using confirmatory factor analysis to find out whether a one-factor or a two-factor solution provides the best fit to the data. The findings supported a one-factor solution. A two-factor solution was only satisfactorily supported if one accepted that the two latent constructs were correlated .99. Study 2 was an experiment in which we experimentally manipulated the amount of prior knowledge 148 students had about a particular thermodynamic phenomenon. Epistemic curiosity and situational interest were each measured four times: before a text was studied, before and after a problem was presented, and after a second text was read. The treatment group studied a text explaining the problemafterthe problem was presented, whereas the control group read it before the problem was presented. The control group, in other words, gained prior knowledge about the problem. In the treatment group, both epistemic curiosity and situational interest significantly increased while being confronted with the problem. This was not the case in the control group. In addition, only in the treatment group scores on both measures significantly decreased after the text explaining the problem was studied. These findings support a knowledge gap account of both situational interest and epistemic curiosity, suggesting an identical underlying psychological mechanism.
Characterizing the metabolites related to rice salt tolerance with introgression lines exhibiting contrasting performances in response to saline conditions
Authors: Xie Ziyan , Wang Chunchao , Zhu Shuangbing , Wang Wensheng , Xu Jianlong , Zhao Xiuqin 
Published: June 2020

AbstractRice is susceptible to salt stress at the seedling stage. To explore the molecular mechanisms underlying salt tolerance, the metabolic responses to salt stress were investigated with a metabolite-profiling technique. Gas chromatography–mass spectrometry was used to profile metabolite changes in five rice lines with a similar genetic background, but with obviously diverse growth performances under saline conditions. A total of 84 metabolites were detected in rice leaf extracts under control and saline conditions. The data revealed that amino acids were enriched more in three salt-tolerant lines (G58, G1710, and IR64) than in two salt-sensitive lines (G45 and G52) under control conditions, suggesting that there were basal metabolite differences between the tolerant and sensitive lines. Additionally, significantly higher allantoin levels in G58, G1710, and IR64 under both stress and control conditions were observed, implying allantoin was important for the better growth of the three rice lines. Moreover, sorbitol, melezitose, and pipecolic acid levels increased considerably in response to salt stress in the five lines, indicating they contribute to rice responses to salt stress significantly. Interestingly, the similar metabolic patterns were regulated by salt stress in the salt-sensitive and salt-tolerant lines, and the main difference was quantitative. The sensitive lines had more pronounced increases during the early stages of the stress treatment than the tolerant lines. Thus, monitoring the metabolome changes of plants may provide crucial insights into how plants tolerate stress. The results presented herein provide valuable information for further elucidating the molecular mechanisms underlying rice salt tolerance.
Proof-Producing Synthesis of CakeML from Monadic HOL Functions
Authors: Abrahamsson Oskar , Ho Son , Kanabar Hrutvik , Kumar Ramana , Myreen Magnus O. , Norrish Michael , Tan Yong Kiam 
Published: June 2020

AbstractWe introduce an automatic method for producing stateful ML programs together with proofs of correctness from monadic functions in HOL. Our mechanism supports references, exceptions, and I/O operations, and can generate functions manipulating local state, which can then be encapsulated for use in a pure context. We apply this approach to several non-trivial examples, including the instruction encoder and register allocator of the otherwise pure CakeML compiler, which now benefits from better runtime performance. This development has been carried out in the HOL4 theorem prover.
Identification and Modeling of the Airbrake of an Experimental Unmanned Aircraft
Authors: Bauer Peter , Anastasopoulos Lysandros , Sendner Franz-Michael , Hornung Mirko , Vanek Balint 
Published: June 2020

AbstractThis paper presents the modeling, system identification, simulation and flight testing of the airbrake of an unmanned experimental aircraft in frame of the FLEXOP H2020 EU project. As the aircraft is equipped with a jet engine with slow response an airbrake is required to increase deceleration after speeding up the aircraft for flutter testing in order to remain inside the limited airspace granted by authorities for flight testing. The airbrake consists of a servo motor, an opening mechanism and the airbrake control surface itself. After briefly introducing the demonstrator aircraft, the airbrake design and the experimental test benches the article gives in depth description of the modeling and system identification referencing also previous work. System identification consists of the determination of the highly nonlinear (saturated and load dependent) servo actuator dynamics and the nonlinear aerodynamic and mechanical characteristics including stiffness and inertia effects. New contributions relative to the previous work are a unified servo angular velocity limit model considering opening against the load or closing with it, the detailed construction and evaluation of airbrake normal and drag force models considering the whole deflection and aircraft airspeed range, the presentation of a unified aerodynamic - mechanic nonlinearity model giving direct relation between airbrake angle, dynamic pressure and servo torque and the transfer function-based modeling of stiffness and inertial effects in the mechanism. The identified servo dynamical model includes system delay, inner saturation, the aforementioned load dependent angular velocity limit model and a transfer function model. The servo model was verified based-on test bench measurements considering the whole opening angle and dynamic load range of the airbrake. New, unpublished measurements with gradually increasing servo load as the servo moves are also considered to verify the model in more realistic circumstances. Then the full airbrake model is constructed and tested in simulation to check realistic behavior. In the next step the airbrake model integrated into the nonlinear simulation model of the FLEXOP aircraft is tested by flying simulated test trajectories with the baseline controller of the aircraft in software-in-the-loop (SIL) Matlab simulation. First, the standalone airbrake simulation is compared to the SIL results to verify flawless integration of airbrake model into the nonlinear aircraft simulation. Then deceleration times with and without airbrake are compared underlining the usefulness of the airbrake in the test mission. Finally, real flight data is used to verify and update the airbrake model and show the effectiveness of the airbrake.
Solubility of Phenylboronic Acid and its Cyclic Esters in Organic Solvents
Authors: Leszczyński Paweł , Hofman Tadeusz , Sporzyński Andrzej 
Published: June 2020

AbstractThe solubilities of phenylboronic acid, its pinacol ester and azaester in organic solvents (chloroform, 3-pentanone, acetone, dipropyl ether and methylcyclohexane) have been determined experimentally by a dynamic method, in which the disappearance of turbidity was determined by measuring of light intensity using a luminance probe. Phenylboronic acid has high solubility in ether and ketones, moderate in chloroform and very low in hydrocarbon. Pinacol ester and azaester show better solubility than the parent acid in all tested solvents. For pinacol ester differences between particular solvents are small, while for azaester the differences are significant. For both esters the highest solubility is observed in chloroform and the lowest in the hydrocarbon. The results have been correlated by the Wilson, NRTL and Redlich–Kister equations. For the phenylboronic acid better correlation of the data is obtained by polynomials in comparison with the above equations. It is connected with additional acid-anhydride equilibrium in the system. The influence of polarity of the solvents on the solubility is discussed.
Using Technology to Structure and Scaffold Real World Experiential Learning in Distance Education
Authors: James Nikki , Humez Andrea , Laufenberg Philipp 
Published: June 2020

AbstractTeam projects allow students to apply their technical skills to a real-world context and build twenty-first century competencies, including teamwork, project management and communication skills. However, the complex challenges that such experiential learning projects present for students and faculty can limit the scale of implementation. This article argues that Virtual Business Projects (VBP), a model of team-based experiential learning where teams of students complete a virtual business project for an industry sponsor, can mitigate these problems by leveraging instructional technology and learning analytics. The VBP model is deployed in multiple universities, which have provided more than 2500 Virtual Business Projects since 2015. We will discuss how innovative technology, embedded in thoughtful learning design, supports experiential learning by taking advantage of features such as customizable scaffolding, automated reflection and feedback loops, and learning analytics.
Comparison of head impact measurements via an instrumented mouthguard and an anthropometric testing device
Authors: Greybe Desney G. , Jones Christopher M. , Brown M. Rowan , Williams Elisabeth M. P. 
Published: June 2020

AbstractThe purpose of this study was to determine and compare the efficacy of head impact measurements via an electronic sensor framework, embedded within a mouthguard, against an anthropometric testing device. Development of the former is in response to the growing issue of head impacts and concussion in rugby union. Testing was conducted in a vehicle safety laboratory using a standard impact protocol utilising the headforms of anthropometric testing devices. The headforms were subjected to controlled front and side impacts. For each impact, the linear acceleration and rotational velocity was measured over a 104-ms interval at a frequency of 1 kHz. The magnitude of peak linear acceleration and peak rotational velocity was determined from the measured time-series traces and statistically compared. The peak linear acceleration and rotational velocity had intraclass correlation coefficients of 0.95 and 0.99, respectively. The root-mean-square error between the measurement systems was 4.3 g with a standard deviation of 3.5 g for peak linear acceleration and 0.7 rad/s with a standard deviation of 0.4 rad/s for rotational velocity. Bland and Altman analysis indicated a systematic bias of 2.5 g and − 0.5 rad/s and limits of agreement (1.96 × standard deviation) of ± 13.1 g and ± 1.25 rad/s for the instrumented mouthguard. These results provide the basis on which the instrumented mouthguard can be further developed for deployment and application within professional rugby, with a view to accurately and reliably quantify head collision dynamics.
Crossed Cerebellar Diaschisis Indicates Hemodynamic Compromise in Ischemic Stroke Patients
Authors: von Bieberstein Lita , van Niftrik Christiaan Hendrik Bas , Sebök Martina , El Amki Mohamad , Piccirelli Marco , Stippich Christoph , Regli Luca , Luft Andreas R. , Fierstra Jorn , Wegener Susanne 
Published: June 2020

AbstractCrossed cerebellar diaschisis (CCD) in internal carotid artery (ICA) stroke refers to attenuated blood flow and energy metabolism in the contralateral cerebellar hemisphere. CCD is associated with an interruption of cerebro-cerebellar tracts, but the precise mechanism is unknown. We hypothesized that in patients with ICA occlusions, CCD might indicate severe hemodynamic impairment in addition to tissue damage. Duplex sonography and clinical data from stroke patients with unilateral ICAO who underwent blood oxygen-level-dependent MRI cerebrovascular reserve (BOLD-CVR) assessment were analysed. The presence of CCD (either CCD+ or CCD−) was inferred from BOLD-CVR. We considered regions with negative BOLD-CVR signal as areas suffering from hemodynamic steal. Twenty-five patients were included (11 CCD+ and 14 CCD−). Stroke deficits on admission and at 3 months were more severe in the CCD+ group. While infarct volumes were similar, CCD+ patients had markedly larger BOLD steal volumes than CCD− patients (median [IQR] 122.2 [111] vs. 11.6 [50.6] ml; p < 0.001). Furthermore, duplex revealed higher peak-systolic flow velocities in the intracranial collateral pathways. Strikingly, posterior cerebral artery (PCA)-P2 velocities strongly correlated with the National Institute of Health Stroke Scale on admission and BOLD-CVR steal volume. In patients with strokes due to ICAO, the presence of CCD indicated hemodynamic impairment with larger BOLD-defined steal volume and higher flow in the ACA/PCA collateral system. Our data support the concept of a vascular component of CCD as an indicator of hemodynamic failure in patients with ICAO.
A novel nonsense mutation in NPR2 gene causing Acromesomelic dysplasia, type Maroteaux in a consanguineous family in Southern Punjab (Pakistan)
Authors: Mustafa Saima , Akhtar Zafrin , Latif Muhammad , Hassan Mubashir , Faisal Muhammad , Iqbal Furhan 
Published: June 2020

Abstract
Background
Acromesomelic dysplasia, type Maroteaux (AMDM) is a rare skeletal dysplasia following autosomal recessive mode of inheritance and characterized by abnormal growth plates, short and abnormal bones in the extremities and spine.

Objective
Present study was designed to report the molecular basis of AMDM in enrolled consanguineous family from Pakistan.

Methods
A consanguineous family from Vehari District in Pakistan having multiple siblings suffering from AMDM was enrolled in present study. Whole exome sequencing (WES) approach was adopted to identify causative agent of AMDM. Human full length NPR2 gene and sequence with nonsense mutation was amplified by using Myc-tagged pXN vector and transformed in E. coli DH5α cells to confirm mutation. SDS-PAGE and Western blotting were done to confirm the production of truncated protein. Computational three dimensional structure generation through homology modeling approach was done to compare protein structure between patients and controls.

Results
WES reveled a nonsense mutation (c.613 C>T, p.R205X) in exon 1 of NPR2 gene leading to premature termination codon in mRNA of NPR2 gene resulting in a truncated protein with 204 amino acid residues that was confirmed by SDS-PAGE and Western blotting. Sanger sequencing confirmed that mutation in all subjects and mutation followed Mendalian pattern of inheritance. Multiple sequence alignment by ClustalW revealed that mutated domain of NPR2 is conserved region. Proetin structure comparison revealed a significant structural part of NPR2 was missing in truncated protein as compared to control.

Conclusion
We are reporting that a novel nonsense mutation (c.613 C>T, p.R205X) in exon 1 of NPR2 gene is causing AMDM in a consanguineous Pakistani family.
Characterisation of the Pseudomonas savastanoi pv. phaseolicola population found in Eastern Australia associated with halo blight disease in Vigna radiata
Authors: Noble Thomas J. , Young Anthony J. , Kelly Lisa A. , Barrerro Roberto A. , Douglas Colin A. , Long Hao , Williams Brett , Mundree Sagadevan 
Published: June 2020

AbstractThis study analysed the phenotypic and genotypic variation among 511 Pseudomonas savastanoi pv. phaseolicola (Psp) isolates, causing halo blight in mungbeans. Collected from symptomatic mungbean (Vigna radiata) crops throughout Australia between 2005 and 2018, a total of 352 Psp isolates were phenotypically screened. Our in planta screening against a set of four mungbean cultivars with known susceptible and resistant reactions revealed five distinctive pathotypes. Isolates belonging to pathotype 2 were the most prevalent at 84% and were found to be highly pathogenic towards all tested mungbean genotypes. Genomic variation was investigated for 205 isolates using DNA fingerprints, splitting the halo blight pathogen population into two broad genetic lineages. Further genetic testing for two known avirulence genes, avrPphE and avrPphF, identified the avrPphE gene in all the tested isolates and avrPphF present in all but two. To identify candidate avirulence genes unique to Psp isolates infecting mungbean in Australia, a comparative genomics study was undertaken on the whole-genome sequences of two epidemiologically important Psp isolates, T11544 and K4287. The information presented in this study has the potential to dramatically improve mungbean disease resistance now and into the future.
Approaches and possibilities for reducing residual stresses in induction brazed cemented carbide/steel joints
Authors: Bobzin K. , Öte M. , Hebing J. 
Published: June 2020

AbstractInduction brazing is widespread in many industries due to its ability for local contactless heating as well as its high heating rates and the associated short cycle times. As a result of these advantages, this brazing process is particularly widespread in the tool industry for mass products made of cemented carbide/steel, for example, in saw blades or milling tools. The state of the art is the use of one or more pyrometers for measuring the surface temperature of the component. However, the measurement can be significantly falsified due to oxidation of the component surface and flux residues or due to the evaporation of the flux. Due to the resulting control deviations and the lack of information about the temperature inside the brazing gap, critical residual stresses can be induced in the joint, which can lead to premature failure of the component. An approach is presented that uses distance and force measurements to monitor the condition of the filler metal in the brazing gap. By using these sensors, the point in time at which the entire filler metal has liquefied can be determined. In this way, overheating of the component can be avoided and the holding time and thus also the residual stresses can be reduced to a minimum. Furthermore, numerical calculations are presented, which compare the resulting residual stresses with conventional brazing foils as well as with brazing foils with a pure copper intermediate layer. In addition, the influence of the thickness of the filler metal was examined. The results show that the choice of the right brazing foil architecture and the thickness of the brazing foil have a significant influence on the residual stresses.