bluuebunny/crossref_metadata_2025_split huggingface dataset:
Asymptotic analysis of solutions of ordinary differential equations with distribution coefficients
Authors: Savchuk A. M. , Shkalikov A. A. 
Published: August 2020

AbstractOrdinary differential equations of the formon the finite intervalare under consideration. Here the functionsandare absolutely continuous and positive and the coefficients of the differential expressionare subject to the conditionswheredenotes theth antiderivative of the functionin the sense of distributions. Our purpose is to derive analogues of the classical asymptotic Birkhoff-type representations for the fundamental system of solutions of the above equation with respect to the spectral parameter asin certain sectors of the complex plane. We reduce this equation to a system of first-order equations of the formwhereis a positive function,is a matrix with constant elements, the elements of the matricesandare integrable functions, andas. For systems of this kind, we obtain new results concerning the asymptotic representation of the fundamental solution matrix, which we use to make an asymptotic analysis of the above scalar equations of high order.Bibliography: 44 titles.
Optimal position of compact sets and the Steiner problem in spaces with Euclidean Gromov-Hausdorff metric
Authors: Malysheva O. S. 
Published: August 2020

Abstract
We study the geometry of the metric space of compact subsets of

considered up to an orientation-preserving motion. We show that, in the optimal position of a pair of compact sets (for which the Hausdorff distance between the sets cannot be decreased), one of which is a singleton, this point is at the Chebyshev centre of the other. For orientedly similar compacta we evaluate the Euclidean Gromov-Hausdorff distance between them and prove that, in the optimal position, the Chebyshev centres of these compacta coincide. We show that every three-point metric space can be embedded isometrically in the space of compacta under consideration. We prove that, for a pair of optimally positioned compacta all compacta that lie in between in the sense of the Hausdorff metric also lie in between in the sense of the Euclidean Gromov-Hausdorff metric. For an arbitrary

-point boundary formed by compact sets of a set

that are neighbourhoods of segments, the Steiner point realizes the minimal filling and also belongs to the set

.
Bibliography: 14 titles.
Journal publication productivity, impact, and quality among Applied Linguistics and TESOL academics in the Group of
Eight Australian Universities
Authors: Riazi Mehdi , Cooper Heather , Calvey Grai 
Published: August 2020

Abstract
This article reports on a study in which journal publication performance of Applied Linguistics and TESOL
(AL/TESOL) academics in the Group of Eight (Go8) Australian universities was examined for each academic rank (Lecturer to
Professor) and across apparent genders (females and males). Journal publication performance was defined in terms of productivity
(number of articles), academic impact (number of citations to those articles), and quality (journal impact factor and quartile
rankings). To this end, journal publications of 65 Go8 AL/TESOL academics were identified over 19 years (2000–2018 inclusive).
Normative research profiles are provided for each academic level and across two genders and are discussed in light of the
literature. Where appropriate, a critical view has also developed concerning issues such as “publish or perish” and “gender gap”
in academic publication. Results and discussion of results can contribute to a better understanding of AL/TESOL journal article
production in Go8 universities as a reference group.
Diglossia and language ideology Petrarch on linguistic variation and differentiation
Authors: Spreafico Marco 
Published: August 2020

SummaryPetrarch’s metalinguistic observations are scattered throughout his work, rare and for the most part elliptical. The present article closely examines Petrarch’s statements about language to arrive at an alternative interpretation to that of previous scholarship. We analyse the ideas, attitudes and beliefs that inform Petrarch’s conception of the difference between Latin and the vernacular languages. The first section provides a critique of the now prevailing view on Petrarch’s metalinguistic thinking. Mirko Tavoni and Silvia Rizzo hypothesize that Petrarch ‘was not conscious of being bilingual’, since he considered Latin and vernaculars as different stylistic varieties of one and the same language. In the remaining two sections we propose an alternative account. Comparing statements made by contemporaries of Petrarch and investigating their origin and rationale, we suggest that Petrarch’s conception and practice cannot be accounted for within a modern perspective of national language and are better captured by the notion of diglossia, in which two linguistic varieties are delimited by the contexts of their use.
Crisis in the Linguistic Society of America
Authors: Newmeyer Frederick J. 
Published: August 2020

Summary
This article discusses and analyses the 1970 election for President of
the Linguistic Society of America. In that year, Dwight Bolinger
challenged the official candidate Martin Joos and defeated him easily. We see that it was
mainly personal and generational factors, rather than intellectual ones, that led to
Bolinger’s victory.
The 2020 plasma catalysis roadmap
Authors: Bogaerts Annemie , Tu Xin , Whitehead J Christopher , Centi Gabriele , Lefferts Leon , Guaitella Olivier , Azzolina-Jury Federico , Kim Hyun-Ha , Murphy Anthony B , Schneider William F , Nozaki Tomohiro , Hicks Jason C , Rousseau Antoine , Thevenet Frederic , Khacef Ahmed , Carreon Maria 
Published: August 2020

Abstract
Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, CH4 activation into hydrogen, higher hydrocarbons or oxygenates, and NH3 synthesis. Other applications are already more established, such as for air pollution control, e.g. volatile organic compound remediation, particulate matter and NOx removal. In addition, plasma is also very promising for catalyst synthesis and treatment. Plasma catalysis clearly has benefits over ‘conventional’ catalysis, as outlined in the Introduction. However, a better insight into the underlying physical and chemical processes is crucial. This can be obtained by experiments applying diagnostics, studying both the chemical processes at the catalyst surface and the physicochemical mechanisms of plasma-catalyst interactions, as well as by computer modeling. The key challenge is to design cost-effective, highly active and stable catalysts tailored to the plasma environment. Therefore, insight from thermal catalysis as well as electro- and photocatalysis is crucial. All these aspects are covered in this Roadmap paper, written by specialists in their field, presenting the state-of-the-art, the current and future challenges, as well as the advances in science and technology needed to meet these challenges.
Molecular transport across a two-dimensional nanomesh membrane–graphdiyne
Authors: Xu Jiyu , Meng Sheng 
Published: August 2020

Abstract
The purification and separation technologies are of great importance to industry and agriculture in modern society. Two-dimensional (2D) crystals emerge as superior membrane materials showing desirable molecular permeability and selectivity. Among them, 2D materials with a nanomesh structure show the greatest potential in molecular transport and separation. Here, we highlight the recent theoretical progresses in molecular transport across 2D graphdiyne membrane with the nanomesh structure. Firstly, the nonlinear and activated water flow were demonstrated through the graphdiyne membranes under external hydrostatic pressure. Then, the superior proton conductivity and perfect selectivity were shown for graphdiyne membrane at ambient conditions. Lastly, graphdiyne was shown to exhibit perfect small gas molecule permeability and selectivity at the atmospheric conditions. The mechanisms for molecular transport and selectivity are also discussed.
Quartet condensation induced by the isovector pairing force
Authors: Sambataro M , Sandulescu N 
Published: August 2020

Abstract
The phenomenon of quartet condensation in the ground state of an isovector pairing Hamiltonian for an even–even N = Z system is investigated. For this purpose we follow the evolution of the ground state from an unperturbed regime up to a strongly interacting one in a formalism of collective pairs. These pairs are those resulting from the diagonalization of the pairing Hamiltonian in a space of two particles coupled to isospin T = 1. The ground state is found to rapidly evolve from a product of distinct T = 0 quartets, each one formed by two of the above pairs, to a condensate of identical quartets built only with the pair corresponding to the lowest energy. This finding establishes a link between the complicated structure of the exact ground state and the simple approximation scheme of the quartet condensation model. The mechanism at the basis of this quartet condensation turns out to be the same which is responsible for the development of a pair condensate in the ground state of a like-particle pairing Hamiltonian.
Microscopic description of quadrupole-octupole coupling in actinides with the Gogny-D1M energy density functional
Authors: Rodríguez-Guzmán R , Humadi Y M , Robledo L M 
Published: August 2020

Abstract
The interplay between quadrupole and octupole degrees of freedom is discussed in a series of U, Pu, Cm and Cf isotopes both at the mean-field level and beyond. In addition to the static Hartree–Fock–Bogoliubov approach, dynamical beyond-mean-field correlations are taken into account via both parity restoration and symmetry-conserving generator coordinate method calculations based on the parametrization D1M of the Gogny energy density functional. Physical properties such as correlation energies, negative-parity excitation energies as well as reduced transition probabilities B(E1) and B(E3) are discussed in detail and compared with the available experimental data. It is shown that, for the studied nuclei, the quadrupole-octupole coupling is weak and to a large extent the properties of negative parity states can be reasonably well described in terms of the octupole degree of freedom alone.
On the validation of a priori estimates of standard displacement uncertainties in T3-stereocorrelation
Authors: Minguet C , Soulas F , Lafargue-Tallet T , Chalumeau E , Pommies M , Peiffer R , Hild F 
Published: August 2020

Abstract
Uncertainty quantification is crucial for any measurement technique. The present work aims at validating a priori estimates of displacement uncertainties. Images acquired prior to fourteen thermomechanical tests were analyzed via FE-based stereocorrelation to determine actual displacement uncertainties, which were compared to a priori estimates. For the studied experimental database, a very good agreement was observed between a priori and a posteriori estimates of standard displacement uncertainties.
Investigation on the cause of the furnace effect of high-temperature fixed points
Authors: Yamada Yoshiro 
Published: August 2020

Abstract
Investigation into the cause of the furnace effect, encountered in the realization of high-temperature fixed points (HTFPs), was conducted at the copper point. Modifications of the cavity design reduced the furnace effect, which indicates that the furnace effect is caused by the interaction between the furnace and the cavity through reflection at the cavity side wall, linked to the design of the HTFP cells. It was shown that the effect could be mitigated by applying a small aperture at the cavity opening. The difference of the realized temperature from that in the absence of the furnace effect was considered, and it was shown that the effect at the copper point in a HTFP furnace was estimated to be around 14 mK or less, the realized temperature being lower than the true temperature.
Preferred growth direction of III–V nanowires on differently oriented Si substrates
Authors: Zeng Haotian , Yu Xuezhe , Fonseka H Aruni , Boras Giorgos , Jurczak Pamela , Wang Tao , Sanchez Ana M , Liu Huiyun 
Published: August 2020

Abstract
One of the nanowire (NW) characteristics is its preferred elongation direction. Here, we investigated the impact of Si substrate crystal orientation on the growth direction of GaAs NWs. We first studied the self-catalyzed GaAs NW growth on Si (111) and Si (001) substrates. SEM observations show GaAs NWs on Si (001) are grown along four <111> directions without preference on one or some of them. This non-preferential NW growth on Si (001) is morphologically in contrast to the extensively reported vertical <111> preferred GaAs NW growth on Si (111) substrates. We propose a model based on the initial condition of an ideal Ga droplet formation on Si substrates and the surface free energy calculation which takes into account the dangling bond surface density for different facets. This model provides further understanding of the different preferences in the growth of GaAs NWs along selected <111> directions depending on the Si substrate orientation. To verify the prevalence of the model, NWs were grown on Si (311) substrates. The results are in good agreement with the three-dimensional mapping of surface free energy by our model. This general model can also be applied to predictions of NW preferred growth directions by the vapor-liquid-solid growth mode on other group IV and III–V substrates.
Effects of Rashba-spin–orbit coupling on superconducting boron-doped nanocrystalline diamond films: evidence of interfacial triplet superconductivity
Authors: Bhattacharyya Somnath , Mtsuko Davie , Allen Christopher , Coleman Christopher 
Published: August 2020

Abstract
Among the many remarkable properties of diamond, the ability to superconduct when heavily doped with boron has attracted much interest in the carbon community. When considering the nanocrystalline boron doped system, the reduced dimensionality and confinement effects have led to several intriguing observations most notably, signatures of a mixed superconducting phase. Here we present ultra-high-resolution transmission electron microscopy imaging of the grain boundary and demonstrate how the complex microstructure leads to enhanced carrier correlations. We observe hallmark features of spin–orbit coupling (SOC) manifested as the weak anti-localization effect. The enhanced SOC is believed to result from a combination of inversion symmetry breaking at the grain boundary interfaces along with antisymmetric confinement potential between grains, inducing a Rashba-type SOC. From a pronounced zero bias peak in the differential conductance, we demonstrate signatures of a triplet component believed to result from spin mixing caused by tunneling of singlet Cooper pairs through such Rashba-SOC grain boundary junctions.
Anthropogenic forcing enhances rainfall seasonality in global land monsoon regions
Authors: Deng Shulin , Sheng Chen , Yang Ni , Song Lian , Huang Qiuyan 
Published: August 2020

Abstract
Understanding how humanity’s influence on the climate affects rainfall seasonality around the world is immensely important for agriculture production, ecology protection, and freshwater resource management. In this study, we qualitatively and quantitatively analyzed the potential influence of anthropogenic forcing on rainfall seasonality in global land monsoon (GM) regions using the Coupled Model Intercomparison Project Phase 5 (CMIP5) general circulation models. We discovered that anthropogenic forcing enhances rainfall seasonality over many parts of GM regions, and was evident in the South Asian and the most parts of the South American and the South African monsoon regions. Anthropogenic forcing partially but clearly contributed to the increasing trend of rainfall seasonality over many parts of GM regions from 1960 to 2012. Moreover, anthropogenic forcing also increased the probability of more pronounced rainfall seasonality in almost all GM regions. The results provide valuable information for agriculture, ecology, and freshwater resource management under climate warming induced by anthropogenic forcing.
Dynamic softening mechanism of 2 vol.% nano-sized SiC particle reinforced Al-12Si matrix composites during hot deformation
Authors: Wang Zhen , Wang Aiqin , Xie Jingpei 
Published: August 2020

Abstract
The hot deformation behavior of the 2 vol.% nano-SiCp/Al-12Si composites prepared by powder metallurgy is complicated due to the simultaneous presence of nano-sized SiC particles and micro-sized precipitated Si particles. In this paper, the isothermal heat compression test and the transmission electron microscope analysis technique were used to analyze the softening mechanism of the 2 vol.% nano-SiCp/Al-12Si composites based on Z parameters and deformation temperature, and the nucleation mechanism of dynamic recrystallization of the 2 vol.% nano-SiCp/Al-12Si composites was analyzed. The results showed that, when LnZ > 55.02, T ≤ 753 K, the cross slip of dislocation was the main softening mechanism; when LnZ < 55.76, T ≥ 733 K, the softening mechanism mainly includes the cross slip, climbing of dislocation, and untangling of three-dimensional dislocation network; when lnZ ≤ 53.65, T ≥ 773 K, the dynamic recovery and dynamic recrystallization were the main softening mechanism of the composites. The dynamic recrystallization nucleation mechanisms of the 2 vol.% nano-SiCp/Al-12Si composites include the sub-grain combination nucleation and grain boundaries bulging nucleation.
Photocatalytic activity of magnetic core-shell CoFe2O4@ZnO nanoparticles for purification of methylene blue
Authors: Suharyadi Edi , Muzakki Afifah , Nofrianti Astrie , Istiqomah Nurul Imani , Kato Takeshi , Iwata Satoshi 
Published: August 2020

Abstract
Magnetic core–shell CoFe2O4@ZnO nanoparticles have been successfully synthesized by using coprecipitation method to provide easy separated nanomaterials and high photocatalytic activity performance. Core–shell nanoparticles with various CoFe2O4-to-ZnO molar ratio (1:2, 1:3, 1:4, 1:5) have been investigated over x-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible spectroscopy, and vibrating sample magnetometer. XRD spectra confirm the cubic spinel ferrite phase structure of CoFe2O4 and the hexagonal wurtzite phase of ZnO. The crystallite size is found within the range of 14.9–20.6 nm. TEM measurement confirms the good crystallinity of the samples. The magnetic hysteresis shows that CoFe2O4@ZnO has high saturation magnetization of about 30 emu g−1 and coercivity of about 300 Oe. Photocatalytic investigation was carried out using methylene blue (MB) under UV irradiation. Our result yields the enhancement of MB degradation as ZnO content increases. The maximum photodegradation achieved by the core–shell nanoparticles is 57.2%, 60.5%, 65.5%, and 78.3% for molar ratio of 1:2, 1:3, 1:4, and 1:5, respectively. The enhancement of MB degradation can be attributed to the formation of internal structure between CoFe2O4 and ZnO in the form of heterojunction structure. The magnetic properties of core–shell lead to the easy separation between the magnetic core–shell nanoparticles and the final degraded solution by permanent magnet.
Adiabatic preparation of entangled, magnetically ordered states with cold bosons in optical lattices
Authors: Venegas-Gomez Araceli , Schachenmayer Johannes , Buyskikh Anton S , Ketterle Wolfgang , Chiofalo Maria Luisa , Daley Andrew J 
Published: August 2020

Abstract
We analyze a scheme for preparation of magnetically ordered states of two-component bosonic atoms in optical lattices. We compute the dynamics during adiabatic and optimized time-dependent ramps to produce ground states of effective spin Hamiltonians, and determine the robustness to decoherence for realistic experimental system sizes and timescales. Ramping parameters near a phase transition point in both effective spin-1/2 and spin-1 models produces entangled spin-symmetric states that have potential future applications in quantum enhanced measurement. The preparation of these states and their robustness to decoherence is quantified by computing the quantum Fisher information (QFI) of final states. We identify that the generation of useful entanglement should in general be more robust to heating than it would be implied by the state fidelity, with corresponding implications for practical applications.
River capture or ancestral polymorphism: an empirical genetic test in a freshwater fish using approximate Bayesian computation
Authors: Souza Mateus S , Thomaz Andréa T , Fagundes Nelson J R 
Published: August 2020

AbstractA headwater or river capture is a phenomenon commonly invoked to explain the absence of reciprocal monophyly of genetic lineages among isolated hydrographic basins in freshwater fish. Under the assumption of river capture, a secondary contact between populations previously isolated in different basins explains the observed genetic pattern. However, the absence of reciprocal monophyly could also arise under population isolation through the retention of ancestral of polymorphisms. Here, we applied an approximate Bayesian computation (ABC) framework for estimating the relative probability of scenarios with and without secondary contact. We used Cnesterodon decemmaculatus as a study model because of the multiple possible cases of river capture and the demographic parameters estimated in a previous mitochondrial DNA study that are useful for simulating scenarios to test both hypotheses using the ABC framework. Our results showed that, in general, mitochondrial DNA is useful for distinguishing between these alternative demographic scenarios with reasonable confidence, but in extreme cases (e.g. recent divergence or large population size) there is no power to discriminate between scenarios. Testing hypotheses of drainage rearrangement under a statistically rigorous framework is fundamental for understanding the evolution of freshwater fish fauna as a complement to, or in the absence of, geological evidence.
Assessing keloid recurrence following surgical excision and radiation
Authors: Gold Michael H , Nestor Mark S , Berman Brian , Goldberg David 
Published: August 2020

AbstractKeloids are a fibroproliferative disorder that can result from a cutaneous injury to the reticular dermis. Recurrence rates as high as 100% have been reported following surgical excision alone. Consequently, a variety of post-surgical techniques have been employed to prevent keloid recurrence, including the use of radiation. Although numerous studies have shown post-excisional X-rays, electron beam, lasers and brachytherapy can reduce the rate of keloid recurrence, numerous inconsistencies, including a wide range of definitions for keloid recurrence, make it difficult to compare study outcomes. The review aims to examine the various means for defining keloid recurrence in clinical trials involving the use of radiation therapy.Searches of the Cochrane Library and PubMed were performed to identify the available information for post-surgical keloid recurrence following radiation therapy. Each identified study was reviewed for patient follow-up and criteria used to define keloid recurrence. The search results included clinical studies with external beam radiation, brachytherapy and superficial radiation therapy. Many studies did not include a definition of keloid recurrence, or defined recurrence only as the return of scar tissue. Other studies defined keloid recurrence based on patient self-assessment questionnaires, symptoms and scar elevation and changes in Kyoto Scar Scale, Japan Scar Workshop Scale and Vancouver Scar Scale scores.The results of this review indicate keloidectomy followed by radiation therapy provide satisfactory recurrence rates; however, clinical studies evaluating these treatments do not describe treatment outcomes or use different definitions of keloid recurrence. Consequently, recurrence rates vary widely, making comparisons across studies difficult. Keloid recurrence should be clearly defined using both objective and subjective measures.