bluuebunny/crossref_metadata_2025_split huggingface dataset:
Billiards bounded by arcs of confocal quadrics on the Minkowski plane
Authors: Karginova E. E. 
Published: May 2019

Abstract
Billiards are considered in compact domains on a Minkowski plane whose boundary consists of arcs of confocal quadrics with angles at corner points

. A classification is obtained for these billiards, called simple billiards. The first integrals and trajectories of the motion of a ball in simple billiards are described. The Fomenko-Zieschang invariants are calculated for every simple billiard, and a theorem is proved which shows that only three different Liouville foliations of simple billiards exist on the Minkowski plane.
Bibliography: 23 titles.
Sort of in Australian English
Authors: Mulder Jean , Penry Williams Cara , Moore Erin 
Published: May 2019

Abstract
This study examines the pragmatic functions of sort of in Australian English (AuE), utilising
discourse from 12 months of the Australian Broadcasting Corporation’s television program Q&A. It explores the
frequency of sort of uses in context with a focus on multifunctionality. Uses are classified in a data-based
schema which synthesises the previously described pragmatic functions of sort of and locates these within Zhang’s (2015) Elastic Language framework. The article thus provides an understanding of
the pragmatic functions of sort of in public discussion contexts within AuE, arguing, most notably, that
sort of performs five of Zhang’s six functions, rather than just the two previously reported, and that in
accounting for the complex uses of this pragmatic marker, a wider range of subtypes needs to be distinguished within two of the
functions.
Pragmatic functions of ‘sort of’ in Persian
Authors: Parvaresh Vahid , Sheikhan Sayyed Amir 
Published: May 2019

AbstractIt goes without saying that as a pragmatic phenomenon, vagueness has over the past few years been a topic of extensive research. However, a huge gap still exists when it comes to the investigation of how vagueness is expressed across different languages and cultures. In the present study, we have put under scrutiny the pragmatic functions of ‘sort of’, a vague expression, in Persian conversation with a view to making cross-linguistic comparisons between different languages possible. Besides confirming the fact that the vague item ‘sort of’ enables interactants to fulfil a wide variety of functions in interactional settings, particularly in face-to-face interactions, the current study reveals that the expression in question can also serve to signal ‘a moment of awkwardness’ as well as the presence of ‘inferable information’. With the former function, ‘sort of’ signals that the speaker is experiencing a feeling of inconvenience and embarrassment. When used as an inferable information signal, however, ‘sort of’ indicates that the utterance has been inferred from the previous or current exchange.
‘Sort of’ in Indonesian television discourse
Authors: Purwanti Indah Tri 
Published: May 2019

Abstract
Expressing vagueness is a common phenomenon especially in spoken discourse. The present paper examines vague
language ‘sort of’ (e.g., kayak gitu) realised in spoken discourse in Indonesian. It accounts for the pragmatic
functions of ‘sort of’ examined in their discourse context. The data under investigation include a 24-hour corpus of a television
talk-show discussing various social issues. A pragmatic qualitative data analysis is predominantly employed directed towards a
functional analysis of the use of ‘sort of’. Descriptive statistics accompany the qualitative analysis to reinforce the
investigation. The quantitative analysis shows that ‘sort of’ was infrequently used in the context of Indonesian television
discourse. The corpus displays various forms of lexical devices for ‘sort of’ in Indonesian. The pragmatic analysis shows that
‘sort of’ was employed as a politeness strategy to tone down strong linguistic expressions and to save the speaker’s positive
face. The infrequent use of ‘sort of’ in the discourse type under investigation in this study reinforces the notion that ‘sort of’
is a feature of informal interaction.
Crowdsourcing localisation for non-profit projects
Authors: Wille Tabea De , Schäler Reinhard , Exton Chris , Exton Geraldine 
Published: May 2019

Abstract
Trommons is an open-source, web-based platform administered by
The Rosetta Foundation. The Rosetta Foundation has worked since 2009 to
eradicate the information gap faced by communities under-served by commercial
localisation, by making information accessible in the languages of those
communities. In recent years we have conducted several studies into crowdsourced
volunteer translation from the perspective of the client organisations. In this
paper we are reporting on the finding of those studies, which include two survey
questionnaires as well as semi-structured interviews with representatives of the
non-profit organisations and staff at the Rosetta Foundation. The studies
conducted provide insights into the following questions: Do organisations work
with volunteers, and why? What reasons would make them not work with volunteers?
What expectations do organisations have of volunteers, as well as a platform
like Trommons, and are those expectations being met? What are the interactions
between organisations and staff at the Rosetta Foundation?
The development of obligatory liaison in early L2 learners of French
Authors: Splendido Frida 
Published: May 2019

AbstractStudies on the acquisition of Frenchliaisonhave primarily focused on monolingual children or adult second language (L2) learners in a university context. To bridge the gap between these two populations, the present article focuses on child L2 (cL2) learners – a particularly interesting group, since they are L2 learners who, unlike adults, do not have access to writing. How doesliaisondevelop in cL2 French? Is the development more similar to L1 or L2 acquisition? These questions are explored through longitudinal data from cL2 learners (age of onset: 3;0–3;5,n = 3), with monolingual (n = 2) and bilingual (n = 3) L1 controls. The cL2 data present certain similarities with adult L2 learners, but also with L1 controls. However, productions vary greatly within the L2 group: whereas one of the three learners shows clear development over time, behaving similarly to the L1 children at the end of the observation period, another learner hardly produces anyliaisonsat all.
The kinase domain of CK1δ can be phosphorylated by Chk1
Authors: Böhm Thomas , Meng Zhigang , Haas Philipp , Henne-Bruns Doris , Rachidi Najma , Knippschild Uwe , Bischof Joachim 
Published: May 2019

ABSTRACT
Members of the casein kinase 1 (CK1) family are key regulators in numerous cellular signal transduction pathways and in order to prevent the development of certain diseases, CK1 kinase activity needs to be tightly regulated. Modulation of kinase activity by site-specific phosphorylation within the C-terminal regulatory domain of CK1δ has already been shown for several cellular kinases. By using biochemical methods, we now identified residues T161, T174, T176, and S181 within the kinase domain of CK1δ as target sites for checkpoint kinase 1 (Chk1). At least residues T176 and S181 show full conservation among CK1δ orthologues from different eukaryotic species. Enzyme kinetic analysis furthermore led to the hypothesis that site-specific phosphorylation within the kinase domain finally contributes to fine-tuning of CK1δ kinase activity. These data provide a basis for the extension of our knowledge about the role of site-specific phosphorylation for regulation of CK1δ and associated signal transduction pathways.
Gradual reset and set characteristics in yttrium oxide based resistive random access memory
Authors: Petzold Stefan , Piros Eszter , Sharath S U , Zintler Alexander , Hildebrandt Erwin , Molina-Luna Leopoldo , Wenger Christian , Alff Lambert 
Published: May 2019

Abstract
This paper addresses the resistive switching behavior in yttrium oxide based resistive random access memory (RRAM) (TiN/yttrium oxide/Pt) devices. We report the coexistence of bipolar and unipolar resistive switching within a single device stack. For bipolar DC operation, the devices show gradual set and reset behavior with resistance ratio up to two orders of magnitude. By using nanosecond regime pulses (20 to 100 ns pulse width) of constant voltage amplitude, this gradual switching behavior could be utilized in tuning the resistance during set and reset spanning up to two orders of magnitude. This demonstrates that yttrium oxide based RRAM devices are alternative candidates for multibit operations and neuromorphic applications.
Structural properties and electrical conductivity of perovskite-type oxides in SOFCs
Authors: Montenegro-Hernández A , Dager P , Caneiro A , Mogni L 
Published: May 2019

Abstract
Structural properties and electrical conductivity of Sr2MgMoO6 (SMMO) and Sr2MgMo0.9TM0.1O6-δ (TM = Co, Mn) compounds were analyzed for establishing the usefulness of these materials as Solid oxide fuel cells (SOFC) anode. SMMO and SMMTM were synthesized through combustion-solution method and annealing in air at temperatures between 1000 and 1200 °C. SMMO and SMMCo with triclinic structures, and SMMMn with tetragonal structure at room temperature showed a cubic symmetry at 800 °C, which are apparently coking-resistant. Mn-doping in SMMO is detrimental for electrical conductivity in diluted-H2 environment, whilst the highest conductivity value was recorded for Co-containing sample on Mo-site of SMMO double perovskite. On the other hand, the oxygen reduction reaction of Pr2-xNdxNiO4+δ, (x=0, 0.3, 1 and 1.7) SOFC cathodes deposited on La0.9Sr0.1Ga0.8Mg0.2O2.85 electrolyte was studied by electrochemical impedance spectroscopy. The obtained results showed that the chemical reactivity between Pr2-xNdxNiO4+δ oxides with electrolyte materials is a serious drawback in their use as cathode in SOFC.
Graphene oxide-based nanomaterial as a coating with anti-corrosion properties
Authors: Pérez F R , Betancur A F , García A , Merlano A S , Cabral M J A , Salazar Á 
Published: May 2019

Abstract
In this work, the synthesis of reduced graphene oxide (rGO) and its incorporation into a hybrid organic-inorganic matrix is reported. The hybrid matrix was obtained from Bisphenol A diglycidyl Ether (DGEBA) and tetraethylorthosilicate (TEOS) as the organic and inorganic phase, respectively, up to have an optimal hybrid matrix (HYBRID) having both good adherence on steel surface and good microhardness. In addition, the rGO was added to HYBRID (HGO). DGEBA, HYBRID and HGO were used as coatings on the surface of different 1018 carbon steel coupons. The coupons were immersed in a H2SO4 solution, then electrochemistry impedance spectroscopy (EIS) measurements were carried out. The corrosion current density, the corrosion rates, and the inhibition efficiency were estimated. The results show that the addition of rGO to HYBRID contributes to obtain a coating with good corrosion protective properties.
Measurement of nonlinear optical parameters of graphene oxide by Z-scan
Authors: Parra I C , Gómez I D , Cabanzo R , Valbuena S , Racedo F J 
Published: May 2019

Abstract
The behavior of the non-linear refraction index, the non-linear absorption coefficient and the complex value of the third-order electrical susceptibility of a concentrated graphene oxide solution at 50% m/v and its corresponding dependence on the laser emission power by the Z-scan technique. The value of the non-linear refractive index η
2, non-linear absorption coefficient β and the complex value of the electric susceptibility χ
(3) were obtained directly by quantifying the transmittance Normalized of the solution when exposed to the electromagnetic radiation of a Nd: YAG laser emitting at 532 nm in continuous wave mode. It was found that β increases and η
2 decreases exponentially by increasing the emission power, respectively. In addition, it was observed that for powers greater than 30 mW, the phenomena of saturable absorption and non-linear refraction related to the effects of thermal induction and influence of the phenomenon of self-defocalization of the incident radiation, respectively, are manifested.
Characterization and optimization of the laser diffracted by an acoustic-optical modulator in the infrared region
Authors: Barrios J , Álvarez J , Racedo F J 
Published: May 2019

AbstractThe acousto-optic modulator is a popular tool in photonic laboratories for amplitude modulation or frequency tuning. Due to the unique feature of the modified frequency diffraction, the acousto-optic modulator can also serve as a key element in laser spectroscopy. In this work, the characterization of an acousto-optic system is presented. For the characterization of the beam, diffracted by this system, the modulators efficiency was optimized based on its vertical positioning, and also the beams angle and position. The profiles of the diffracted beams under the frequency modulation are shown up, down, and near of the modulation’s central frequencyIn an AOM, the light is scattered from successive wavefronts that interoperate constructively. The condition for the constructive interference of scattered light is given by the Equation (1), in which the favoring of the orders diffracted by the modulator can be seen as predicted by the acousto-optic principle.
Magnetoexciton in type-II semiconductor nanocone
Authors: Herrera-Torres M , Sierra-Ortega J , Garcia L F , Mikhailov I D 
Published: May 2019

Abstract
We study spectral properties of heavy-hole exciton captured by a type-II InP/GaAs nanocone in the effective mass approximation. Assuming that the effective mass of the hole is essentially larger than of the electron, we solve the two-particle Schrödinger equation by using the adiabatic approximation and the Fourier series expansion method. We analyze the alteration of the averaged spatial separation of the electron and the hole, the period of the Aharonov–Bohm oscillations of the energy levels and the magnetic momenta as functions of the external magnetic field, applied along the symmetry axis. Our theoretical analysis reveals a possibility for controlling the electric polarization in type-II semiconductor structure with captured exciton, by means of the applying of an external magnetic field.
Measurement of the neutrino oscillation parameters by NOvA
Authors: Acero M A 
Published: May 2019

Abstract
Using a beam made (mainly) by muon neutrinos traveling through the earth, the NOvA Experiment looks for the appearance of electron neutrinos, a transformation explained by the quantum-mechanical phenomenon known as neutrino oscillation. NOvA uses two neutrino detectors located 14.6 mrad off-axis from the main beam direction. The first (Near) detector stands at a distance of 1 km from the neutrino source, while the second (Far) one is at 810 km. Traveling from the Near Detector to the Far Detector, muon neutrinos can morph into electron neutrinos with a probability depending upon the parameters

Δ

m

32

2

and sin2
θ
23, among others. By comparing the observed number of νµ
and νe
events at the Far Detector with the expected number of events predicted by a 3-neutrino oscillation model, NOvA is able to measure these parameters and help to improve our understanding about neutrinos. After a brief introduction to the physics of neutrinos and a presentation of the experiment, in this talk the most recent results obtained by NOvA through the study of muon neutrino oscillations νµ
→ νµ
and νµ
→ νe
, are shown. The oscillation parameters are found to be

Δ

m

32

2

=
2.44
×

10

−

3

eV

2

and sin2
θ
23 = 0.56.
On the use of satellite, gauge, and reanalysis precipitation products for drought studies
Authors: Golian Saeed , Javadian Mostafa , Behrangi Ali 
Published: May 2019

Abstract
Precipitation is a critical variable to monitor and predict meteorological drought. The WMO recommended standardized precipitation index (SPI) is calculated from gauge (i.e. GPCC), satellite-gauge (GPCP, CHIRPS), reanalysis (i.e. ERA-Interim, and MERRA-2), and satellite-gauge-reanalysis (i.e. MSWEP) over the global domain. Measured differences among the precipitation datasets include metrics such as percent area under drought, number of drought events, spread and correlation in the number of drought events, and critical success index in capturing moderate and severe-exceptional droughts. As precipitation products are available at different lengths and spatial resolutions, sensitivity of drought metrics to record-length and spatial resolution were explored. The results suggest that precipitation-based drought metrics can vary significantly with the choice of precipitation product, its record-lengths, and spatial resolution. These relationships also vary with the severity of drought events with more severe drought events being more sensitive to the differences in resolution and record length. The quantified variation among the products has to be recognized in the interpretation of drought events when a single or a subset of products used.
Quantum witness of a damped qubit with generalized measurements
Authors: Bojer Manuel , Friedenberger Alexander , Lutz Eric 
Published: May 2019

Abstract
We evaluate the quantum witness based on the no-signaling-in-time condition of a damped two-level system for nonselective generalized measurements of varying strength. We explicitly compute its dependence on the measurement strength for a generic example. We find a vanishing derivative for weak measurements and an infinite derivative in the limit of projective measurements. The quantum witness is hence mostly insensitive to the strength of the measurement in the weak measurement regime and displays a singular, extremely sensitive dependence for strong measurements. We finally relate this behavior to that of the measurement disturbance defined in terms of the fidelity between pre-measurement and post-measurement states.
Performing the Identity of the Medium: Adaptation and Television Historiography
Authors: Bignell Jonathan 
Published: May 2019

AbstractThis article focuses on how histories of television construct narratives about what the medium is, how it changes, and how it works in relation to other media. The key examples discussed are dramatic adaptations made and screened in Britain. They include early forms of live transmission of performance shot with multiple cameras, usually in a TV studio, with the aim of bringing an intimate and immediate experience to the viewer. This form shares aspects of medial identity with broadcast radio and live television programmes, and with theatre. The article also analyses adaptations of a later period, mainly filmed dramas for television that were broadcast in weekly serialized episodes, and shot on location to offer viewers a rich engagement with a realized fictional world. Here, film production techniques and technologies are adapted for television, alongside the routines of daily and weekly scheduling that characterize television broadcasting. The article identifies and analyses the questions about what is proper to television that arise from the different forms that adaptations took. The analyses show that television has been a mixed form across its history, while often aiming to reject such intermediality and claim its own specificity as a medium. Television adaptation has, paradoxically, operated as the ground to assert and debate what television could and should be, through a process of transforming pre-existing material. The performance of television’s role has taken place through the relay, repetition, and remediation that adaptation implies, and also through the repudiation of adaptation.
A comprehensive method protocol for annotation and integrated functional understanding of lncRNAs
Authors: Kunz Meik , Wolf Beat , Fuchs Maximilian , Christoph Jan , Xiao Ke , Thum Thomas , Atlan David , Prokosch Hans-Ulrich , Dandekar Thomas 
Published: May 2019

Abstract
Long non-coding RNAs (lncRNAs) are of fundamental biological importance; however, their functional role is often unclear or loosely defined as experimental characterization is challenging and bioinformatic methods are limited. We developed a novel integrated method protocol for the annotation and detailed functional characterization of lncRNAs within the genome. It combines annotation, normalization and gene expression with sequence-structure conservation, functional interactome and promoter analysis. Our protocol allows an analysis based on the tissue and biological context, and is powerful in functional characterization of experimental and clinical RNA-Seq datasets including existing lncRNAs. This is demonstrated on the uncharacterized lncRNA GATA6-AS1 in dilated cardiomyopathy.
Novel relationships between porcine fetal size, sex, and endometrial angiogenesis†
Authors: Stenhouse Claire , Hogg Charis O , Ashworth Cheryl J 
Published: May 2019

AbstractIt is hypothesized that growth restriction occurs due to inadequate vascularization of the feto-maternal interface. Evidence exists for sexual dimorphism in placental function although associations between fetal sex and the endometrium remain poorly investigated. This study investigated the relationship between porcine fetal size, sex and endometrial angiogenesis at multiple gestational days (GD).Endometrial samples supplying the lightest and closest to mean litter weight (CTMLW), male and female Large White X Landrace conceptuses or fetuses were obtained at GD18, 30, 45, 60, and 90 (n = 5–9 litters/GD). Immunohistochemistry for CD31 revealed a greater number of blood vessels in endometrium supplying females compared to those supplying males at GD45. Endometrial samples supplying the lightest fetuses had fewer blood vessels (GD60) and uterine glands (GD90) compared to those supplying the CTMLW fetuses. Quantitative PCR revealed decreased CD31 (GD60), HPSE and VEGFA (GD90) expression, alongside increased HIF1A (GD45) expression in endometrial samples supplying the lightest compared to the CTMLW fetuses. At GD30, PTGFR, CD31, and VEGFA mRNA expression was increased in samples supplying female fetuses compared to those supplying male fetuses. Intriguingly, decreased expression of ACP5, CD31, HIF1A, and VEGFA mRNAs was observed at GD60 in endometrial samples supplying female fetuses compared to those supplying their male littermates. Endothelial cell branching assays demonstrated impaired endothelial cell branching in response to conditioned media from endometrial samples supplying the lightest and female fetuses compared with the CTMLW and male fetuses, respectively.This study has highlighted that endometrial tissues supplying the lightest and female fetuses have impaired angiogenesis when compared with the CTMLW and female fetuses respectively. Importantly, the relationship between fetal size, sex and endometrial vascularity is dynamic and dependent upon the GD investigated.