bluuebunny/crossref_metadata_2025_split huggingface dataset:
The signifying voice
Authors: McDonald Edward 
Published: October 2020

AbstractDrawing on a social semiotic framework, this paper sets out to examine two different semiotic systems whose default mode of expression is the human voice – language and music. Through comparing how each system differentially employs the human voice, we can identify both their commonalities and differences, and go some way to treating both equally within de Saussure’s envisaged broader field of “semiology”, avoiding the common trap of “linguistic imperialism”, i.e. taking language as the model for all semiotic systems. Starting by conceptualising the key relationship between the text, or unified instance of meaning-making, and the social contexts in which it functions, the paper then examines the material affordances utilised by each system, and the kinds of social meanings they express.
Bilateral comparison of 10 pF and 100 pF standards (ongoing BIPM key comparisons BIPM.EM-K14.a and 14.b) between the SASO (Saudi Arabia) and the BIPM
Authors: Moreno J A , Gournay P , AlAyli A 
Published: October 2020

This report presents the results of a bilateral comparison between the SASO, Saudi Arabia, and the BIPM, which was carried out using two 10 pF and two 100 pF travelling standards belonging to the BIPM following an "A-B-A" pattern. The comparison at 10 pF forms part of the ongoing BIPM key comparison BIPM.EM-K14.a and that at 100 pF of the ongoing BIPM key comparison BIPM.EM-K14.b, where BIPM is the pilot laboratory for both comparisons.
The standards were measured during a total time of 21 weeks, from October 2019 to February 2020. The measurand of this comparison was the two terminal-pair capacitance of the travelling capacitors at a frequency of 1000 Hz, and a measuring rms voltage of 10 V.
The results from the SASO and the BIPM agree within a difference smaller than the relative expanded uncertainty of the comparison, which is dominated by the contribution of the calibration of the SASO reference capacitors.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Persistence in black hole lattice cosmological models
Authors: Coley A A 
Published: October 2020

Abstract
Dynamical solutions for an evolving multiple network of black holes near a cosmological bounce dominated by a scalar field are investigated. In particular, we consider the class of black hole lattice models in a hyperspherical cosmology, and we focus on the special case of eight regularly-spaced black holes with equal masses when the model parameter κ > 1. We first derive exact time evolving solutions of instantaneously-static models, by utilizing perturbative solutions of the constraint equations that can then be used to develop exact 4D dynamical solutions of the Einstein field equations. We use the notion of a geometric horizon, which can be characterized by curvature invariants, to determine the black hole horizon. We explicitly compute the invariants for the exact dynamical models obtained. As an application, we discuss whether black holes can persist in such a Universe that collapses and then subsequently bounces into a new expansionary phase. We find evidence that in the physical models under investigation (and particularly for κ > 1) the individual black holes do not merge before nor at the bounce, so that consequently black holes can indeed persist through the bounce.
The local Lorentz symmetry violation and Einstein equivalence principle
Authors: Zhang Baocheng 
Published: October 2020

Abstract
Lorentz symmetry violation (LV) was recently proposed to be testable with a new method, in which the effect of the violation is described as a certain local interaction Shaniv et al (2018 Phys. Rev. Lett.
120 103202). We revisit this LV effect in the paper and show that it is not only local, but it also represents a classical violation according to the recent quantum formulation of the Einstein equivalence principle (EEP). Based on a harmonically trapped spin-1/2 atomic system, we apply the results of table-top experiments testing LV effect to estimate the corresponding violation parameter in the quantum formulation of EEP. We find that the violation parameter is indeed very small, as expected by the earlier theoretical estimation.
Modelling overlap functions for one-nucleon removal: role of the effective three-nucleon force
Authors: Timofeyuk N K 
Published: October 2020

Abstract
One-nucleon overlap functions, needed for nucleon-removal reaction calculations, are solutions of an inhomogeneous equation with the source term defined by the wave functions of the initial and final nuclear states and interaction between the removed nucleon with the rest. The source term approach (STA) allows the overlaps with correct asymptotic decrease to be modelled while using nuclear many-body functions calculated in minimal model spaces. By properly choosing the removed nucleon interaction the minimum-model-space STA can reproduce reduced values of spectroscopic factors (SFs) extracted from nucleon-removal reactions and predicts isospin asymmetry in the SF reduction. It is well-known that model space truncation leads to the appearance of higher-order induced forces, with three-nucleon force being the most important. In this paper the role of such a force on the source term calculation is studied. Applications to one-nucleon removal from double-magic nuclei show that three-nucleon force improves the description of available phenomenological overlap functions and reduces isospin asymmetry in SFs.
Severity assessment of COVID-19 using CT image features and laboratory indices
Authors: Tang Zhenyu , Zhao Wei , Xie Xingzhi , Zhong Zheng , Shi Feng , Ma Tianmin , Liu Jun , Shen Dinggang 
Published: October 2020

Abstract
The coronavirus disease 2019 (COVID-19) is now a global pandemic. Tens of millions of people have been confirmed with infection, and also more people are suspected. Chest computed tomography (CT) is recognized as an important tool for COVID-19 severity assessment. As the number of chest CT images increases rapidly, manual severity assessment becomes a labor-intensive task, delaying appropriate isolation and treatment. In this paper, a study of automatic severity assessment for COVID-19 is presented. Specifically, chest CT images of 118 patients (age 46.5 ± 16.5 years, 64 male and 54 female) with confirmed COVID-19 infection are used, from which 63 quantitative features and 110 radiomics features are derived. Besides the chest CT image features, 36 laboratory indices of each patient are also used, which can provide complementary information from a different view. A random forest (RF) model is trained to assess the severity (non-severe or severe) according to the chest CT image features and laboratory indices. Importance of each chest CT image feature and laboratory index, which reflects the correlation to the severity of COVID-19, is also calculated from the RF model. Using three-fold cross-validation, the RF model shows promising results: 0.910 (true positive ratio), 0.858 (true negative ratio) and 0.890 (accuracy), along with AUC of 0.98. Moreover, several chest CT image features and laboratory indices are found to be highly related to COVID-19 severity, which could be valuable for the clinical diagnosis of COVID-19.
The factors determining the evolution of edge-localized modes in plasmas driven by lower hybrid currents
Authors: Zhang Xiao , Zang Qing , Wang Yi-feng , Han Xiao-feng , Yang Qing-quan , Xu Shuai , Meng Ling-yi , Huang Jia , Lin Xiao-dong , Wang Ke , Liu Haiqing , Yang Jianhua , Gong Xiangzu 
Published: October 2020

Abstract
Modulated lower-hybrid waves (LHWs) are injected into the Experimental Advanced Superconducting Tokamak to determine the physical principles responsible for the suppression or mitigation of edge-localized modes (ELMs). There are two cases of modulated-ELM evolution (stable and unstable cases), because of two different modulated pedestal densities. They can be attributed to additional magnetic perturbations induced by the LHWs, similarly to the effect of resonant magnetic perturbations. As regards the case of unstable modulated ELM evolution, the plasma stored energy increases as the LHWs turn on. In contrast, the central line-averaged electron density decreases, which is different from the case of ELM suppression or from the stably modulated case. The effect of LHWs or density ‘pump-out’ effect can pass across the top of the pedestal region and enter the interior of the density pedestal, causing a decrease in the electron density gradient and its value at the top of the pedestal. Simultaneously, the pressure gradient and edge bootstrap current density increase. For ELM suppression (or for the stable) case, LHWs can couple only with the plasma outside the top region of pedestal, because of the higher top value of density pedestal. Thus, LHWs can pump out the electron density significantly only in the pedestal foot region, producing a larger gradient of electron density pedestal. Statistical analysis of the data indicates that there is a threshold value of the central line-averaged electron density for each of the two modulated ELM cases. Furthermore, the ELM amplitude is modulated by LHWs with a time delay of hundreds of microseconds, which may be further evidence that LHWs have a significant impact on the evolution of ELMs and pedestal structures. All these results imply that there is a significant correlation between the ELM behavior and the electron density profiles modulated by LHWs.
A unified approach for the calculation of in-plane dielectric constant of films with interdigitated electrodes
Authors: Reader Trygve M , Hanke Ulrik , Halvorsen Einar , Grande Tor 
Published: October 2020

Abstract
Interdigitated electrodes (IDEs) on dielectric films is an important electrode design in electrical components such as transducers and sensors. Further development and use of IDEs for characterization of the in-plane properties of dielectric films requires models for the capacitance, particularly when used in a multilayer stack. Previous models for the capacitance have permitted erroneous boundary conditions between layers with associated limitations to accuracy. In this work we present a new model based on fulfilling the boundary conditions between layers with different dielectric constant. We further demonstrate how the model can be used to calculate the in-plane dielectric constant and polarization of BaTiO3 films. The model is shown to outperform previous models using both the experimental data from BaTiO3 films on SrTiO3 substrates and finite element method simulations of the corresponding case. One important advantage compared to previous work is that the new model provides good results regardless of film thickness.
Two-dimensional hexagonal manganese carbide monolayer with intrinsic ferromagnetism and half-metallicity
Authors: Sheng Kang , Wang Zhi-Yong , Yuan Hong-Kuan , Chen Hong 
Published: October 2020

Abstract
Recent experimentally observed intrinsic ferromagnetism in two-dimensional (2D) van der Waals crystals has ignited substantial interests due to their great potential in spintronic devices. However, their practical applications are hampered by rather low Curie temperature and small magnetic anisotropic energy. Here, we predict from first-principles calculations that the 2D pristine hexagonal manganese carbide (h-MnC) sheet exhibits robust ferromagnetic and half-metallic features with complete spin polarization, sizable magnetic anisotropic energy, and wide half-metallic gap near the Fermi energy level. Moreover, the h-MnC sheet can retain its structure up to the temperature of 1000 K, indicating a highly thermodynamic stability. The Monte Carlo simulations based on the Heisenberg model with single-ion anisotropy predict a Curie temperature of 233 K in 2D h-MnC crystal. We confirm the robustness of the ferromagnetism and half-metallicity against the external strain from −6% to 10%. Also, a feasible experimental fabrication route is proposed to realize the h-MnC monolayer via heterostructure engineering and exfoliation techniques. Overall, the robustness of the half-metallicity in combination with the high-temperature ferromagnetism render the freestanding h-MnC monolayer and even its energetically favorable h-MnC/MoS2 and h-MnC/MoSe2 heterostructures quite promising materials for developing practical spintronic nanodevices.
Corrigendum and Addendum: Helium flux effects on bubble growth and surface morphology in plasma-facing tungsten from large-scale molecular dynamics simulations (2019 Nucl. Fusion 59 066035)
Authors: Hammond Karl D. , Lee Brandon F. , Naeger Ian V. , Widanagamaachchi Wathsala , Lo Li-Ta , Maroudas Dimitrios , Wirth Brian D. 
Published: October 2020

Abstract
Two of the simulations discussed in a prior article (Hammond et al 2019 Nucl. Fusion
59 066035) were affected by a simulation glitch. We repeated the affected calculations and discuss them here. The overall conclusions are essentially unchanged, though the details are different. In particular, observations that we referred to as ‘concerted bursting’ were caused primarily by non-physical heating and cooling applied by the thermostat after most atoms’ velocities were deleted (for reasons that are not known for certain). The phenomenon of one bubble bursting and causing another nearby bubble to burst does exist, though its effects are much less spectacular in the absence of non-physical driving forces. The observation of an interconnected network of sub-surface cavities formed by burst bubbles is real, and the observation of holes on the surface 1–2 nm in diameter is also confirmed.
On the ground-state energy of the finite sine-Gordon ring
Authors: Rutkevich Sergei B 
Published: October 2020

Abstract
The Casimir scaling function characterising the ground-state energy of the sine-Gordon model in a finite circle has been studied analytically and numerically both in the repulsive and attractive regimes. The numerical calculations of the scaling function at several values of the coupling constant were performed by the iterative solution of the Destri–de Vega nonlinear integral equations. The ultraviolet asymptotics of the Casimir scaling functions was calculated by perturbative solution of these equations, and by means of the perturbed conformal field-theory technique, and compared with numerical results.
Green synthesis of NiFe2O4 nanoparticles using different fuels and their structural characterization
Authors: Kulkarni G D , Patade S R , Parlikar R R , Gopale  , Chilwar R R , Saraf T. S. , Jadhav K M 
Published: October 2020

Abstract
Nickel ferrite nanoparticles have been prepared using clove and citric acid as fuels. Present work focuses the rapid, eco-friendly, inexpensive, green synthesis over regular chemical routes for the preparation of most applicable Nickel ferrite nanoparticles. Here we use Clove (Syzygium aromaticum) extract and citric acid as fuel for green and chemical route synthesis of nickel ferrite nanoparticles respectively. The synthesis of metal nanoparticles using clove extract is a modern alternative for their production. The combination of methods of soft chemistry and green chemistry is the ideal synthesis strategy. Their structural properties are characterized using X-ray diffraction (XRD) study. The XRD study revealed the cubic spinel structure of the Fd3m space group. Also found 24 nm and 26 nm average crystallite size of NiFe2O4-clove and NiFe2O4-C6H8O7 nanoparticles respectively. This comparative study helps to increase attention in various research areas leading to materials that are relatively reproducible and have excellent properties using environmentally friendly, non-toxic and bio-composite reagents.
Low temperature synthesis and investigations of magnetic properties of cobalt ferrite nanoparticles
Authors: Jadhavar L B , Kakade G N , Rajmane S V , Kavade R B , Bhandari J M , Vidhate R G 
Published: October 2020

Abstract
In the present study we report the synthesis of cobalt ferrite nanoparticles using one of the well-known wet chemical method i.e. sol-gel auto combustion technique. The synthesis was carried out at sufficiently low temperature of 100°C. Citric acid was used as a fuel in the synthesis process. The obtained nanoparticles were sintered at 550°C for 4 h and then used for structural and magnetic investigations. The phase pure nature and nano crystalline nature was investigated through X-ray diffraction technique. Room temperature X-ray diffraction pattern show well defined reflections oriented at different Bragg’s angle corresponding to Miller indices (220), (311), (222), (400), (422), (511) and (440). All this reflections belongs to cubic spinel structure. Thus, XRD analysis confirms the formation of single phase compound. The particle size was obtained through Scherrer’s equation and found to be 21 nm, indicating the nanocrystalline nature. The magnetic properties were investigated using pulse field hysteresis loop tracer at room temperature. The saturation magnetization show increased values as compared to the bulk cobalt ferrite. The coercivity found to be less which exhibits the superparamagnetic behaviour. The obtained structural and magnetic parameters are useful in biomedical applications.
A review on green synthesis and characterization technique for ferrite nanoparticles and their applications
Authors: Ashok Pandit Vishal , Radhegovind Repe Gahjanan , Dagadu Bhamre Jyoti , Chaudhari Nandkishor D. 
Published: October 2020

Abstract
Ferrite nanoparticles have a large interest due to their wide range of applications in biomedical, industrial electronic devices, and wastewater treatment. This review is focused on the green synthesis of ferrite nanoparticles characterization and their application in various field.The green synthesis technique using plant or their extracts are discussed. The characterization techniques of ferrite nanoparticles with their applications are briefly reviewed.
X-ray Diffraction, Infrared and Magnetic Studies of NiFe2O4 Nanoparticles
Authors: Gopale S B , Kakade G N , Kulkarni G D , Vinayak V , Jadhav S P , Jadhav K M 
Published: October 2020

Abstract
Spinel ferrite nanoparticles plays important role in many applications due to their excellent structural, magnetic and electrical properties. Among the spinel ferrite nickel ferrite is a prominent candidate for various applications and is the subject of interest to many researchers. Therefore, attempt is made to synthesize NiFe2O4 nanoparticles and investigate its structural, infrared and magnetic properties for high frequency applications. NiFe2O4 nanoparticles were synthesized by sol-gel auto-ignition technique. Efforts are made to obtain nanopowder of high quality by taking extra care and some modification in synthesis procedure. In order to examine the phase purity and nanocrystalline nature, prepared nanopowder was subjected to X-ray diffraction studies. A close examination of XRD pattern revealed the presence of the reflections belonging only to cubic spinel structure. No extra peak was seen in the XRD pattern. The crystallite size was estimated using Debye-Scherrer’s formula and found to be 22nm. FT-IR spectrum of NiFe2O4 shows the two prominent absorption bands near the frequency range 400 cm−1 and 600 cm−1. The important magnetic property was studied by M–H plot which was recorded using pulse field hysteresis loop tracer at room temperature. Using the M-H plots the values of saturation magnetization, coercivity, and remanence magnetization are recorded as 37.61 emu/g, 177 Oe, and 11.71 emu/g respectively. The obtained data for structural and magnetic properties will be useful for high frequency applications.
Structural and dielectric properties of mixed spinel ferrite Cu(0.7)Zn(0.3)Fe2O4 nanoparticles
Authors: Kale S B , Borade R M , Kounsalye J S , Raut A V , Nimbhore S R , Jadhav K M 
Published: October 2020

Abstract
In this communication we report structural and dielectric properties of mixed Cu-Zn spinel ferrite nanoparticles. Cu(0.7)Zn(0.3)Fe2O4 nanoparticles were synthesized by using standard and well known sol-gel auto-combustion techniques. The obtained nanoparticles were annulated at 520°C for 4 h and then used for further study. The X-ray diffraction (XRD) pattern was recorded at room temperature to investigate the single phase nanocrystalline nature of prepared sample. The XRD pattern shows formation of single phase cubic spinel structure with average crystallite size of ∼24 nm. The crystallite size was determined by using standard Scherrer’s equation. The other structural parameters like lattice constant, unit cell volume, X-ray density etc. were determined using XRD data. The dielectric properties were measured at room temperature and as a function of frequency using LCR-Q meter. The dielectric constant, dielectric loss and dielectric loss tangent all get decreased exponentially with increasing frequencies. The observed dielectric behaviour is similar to that of reported in the literature.
Structural and Chemical Properties of ZnFe2O4 Nanoparticles Synthesised by Chemical Co-Precipitation Technique
Authors: Andhare D D , Jadhav S A , Khedkar M V , Somvanshi Sandeep B. , More S. D. , Jadhav K M 
Published: October 2020

Abstract
In the present work, Zn-ferrite nanoparticles have been synthesized by chemical co-precipitation method. Prepared samples were characterized by XRD and FTIR to study its structural and chemical properties. The formation of single phase with Fd-3m space group of Zn- ferrite was revealed by XRD and also studied the effect of synthesis techniques on structural parameters. Crystallite size of ZnFe2O4 was found to be 26.11 nm. The FTIR spectra showed two expected bands in the range 550-560 cm1 (i.e. U1) and 400 -410 cm1 (i.e. u2) which confirms the formation of ferrite phase.
Identification of Penicillium Species of Fruits Using Morphology and Spectroscopic Methods
Authors: Saif F A , Yaseen S A , Alameen A S , Mane S B , Undre P B 
Published: October 2020

Abstract
This study aimed to investigate and identify the isolated five species of Penicillium from different rot fruits. The P.implicatum, P.aurantiogriseum, P.purpurogenum, P.citrinum, and P.notatum Penicillium species were found. Penicillium species are important in the field of medicine, industry, and produces secondary metabolite, some penicillium species are contaminant for bread, grains, fruits, and processed food, so the identification and characterization of these species are very important. By using the microscopic technique and spectroscopic methods for identification and characterization that species isolated from infected fruits. The spectroscopic methods are Raman spectroscopy and UV-Visible spectrophotometry, they are fast analysis techniques, sensitive, use a small quantity of sample, and depend on biochemical components for the discriminate of Penicillium spp. Raman vibrational spectra and UV-Visible absorption spectra showed differences for five Penicillium species. Our results proved that spectroscopic techniques showed spectral differences for five Penicillium species, and this agreed with the study of morphological characteristics for that species. The conclusions of this study demonstrate that spectroscopic methods in combination with morphological techniques could be accurate and reliable approach for discrimination between different Penicillium species.