bluuebunny/crossref_metadata_2025_split huggingface dataset:
Successful DC current limitation above 100 Vm−1 for 50 ms using HTS tapes with critical currents exceeding 750 A/cm-width
Authors: Lacroix Christian , Lavergne Olivier , Leduc Thomas , Dupuis-Desloges Félix , Moret Lucile , Sirois Frédéric , Escamez Guillaume , Bruzek Christian-Éric , Tixador Pascal , Grosse Veit , Bauer Markus 
Published: November 2020

Abstract
High-voltage direct current transmission systems are expected to allow the transmission of huge volumes of electricity over long distances. The use of superconducting fault current limiters (SFCLs) based on second-generation (2G) high-temperature superconductor (HTS) coated conductors (CCs) is a promising solution to mitigate fault currents in DC transmission systems. To fabricate a SFCL whose size remains acceptable, which means minimizing the length of the HTS tape used, the tape must sustain a high electric field during the whole fault duration. In this paper, high performance commercial 2G HTS CCs from THEVA (more than 750 A/cm-width at 77 K in self-field), on which a 500 µm thick Hastelloy shunt was soldered, were tested by submitting them to faults of different amplitudes and durations. Measurements revealed that these HTS tapes could sustain any type of fault up to 100 V m−1, lasting up to 50 ms. Three-dimensions finite element simulations were able to reproduce accurately the experiments by using the appropriate temperature dependence of the critical current density and power law index, and by accounting for the variations in the local critical current along the length of the HTS tapes.
Investigation of the problems of parametric identification of nanosatellite motion model
Authors: Belokonov I V , Lomaka I A 
Published: November 2020

Abstract
In this paper, we discuss problems that exist during nanosatellite identification procedure. These problems are: choice of data collection interval that allows to identify required parameters with desired error, study of dependence model between identification parameters. We studied solution of these problems on the example of variable-mass SamSat-M nanosatellite which is equipped with propulsion unit. We obtained analytical model of parameters dependences and provided results of identification of fuel level.
Estimation of log dead reckoning error induced by tidal currents
Authors: Sokolov A , Motorin A 
Published: November 2020

Abstract
Log dead reckoning autonomous correction problem is considered. The problem is solved by using corrector, contained only one uncontrolled gyroscope and working according to single-channel inertial vertical principle. It is shown that the main dead reckoning error is currents variability which cannot be measured by log and having tidal nature mainly.
Requirements for CubeSat on-board sensors for identification of design and inertial characteristics
Authors: Lomaka I A , Boltov E A , Avariaskin D P 
Published: November 2020

AbstractIn this paper, we discuss requirements formulation for CubeSat on-board sensors characteristics for solving identification problem. The problem is to estimate design and inertial parameters of CubeSat-format nanosatellite using on-board sensor measurements. Identification problem for CubeSats becomes more and more actual every year because CubeSat design becomes more complicated due to complex missions requirements. Modern CubeSats can be equipped with deployable solar panels, propulsion units and different types of transformable structures. This fact makes it necessary to study CubeSats as bodies with variable inertial and design characteristics. In this article the design parameter is fuel level in the CubeSat propulsion system and inertial parameters are inertial coefficients (inertia moments analog). We study requirements formulation for magnetometer and angular rate sensor, as this combination of sensors is the most popular in CubeSat development. The main idea of this paper is to study the sensitivity of measurements to estimated parameters. This sensitivity depends on time and measurement noise, large sensitivity leads to low estimation error. We conducted a numerical study and provide an algorithm which allows to define sensitivity-time-noise dependence for each type of sensors and formulate the requirements for their characteristics.
Formation of a director index to assist the pilot in conducting airborne geophysical survey
Authors: Karshakov E V , Shevchenko A M , Garakoev A M 
Published: November 2020

Abstract
Airborne geophysical survey of the territory is performed by flying an aircraft along the trajectories covering the studied area of the surface. Naturally, the quality of manual piloting is subject to increased requirements. At the same time, a flight with terrain tracking and in the presence of wind disturbances is a difficult task for the pilot. The paper suggests informing the pilot about deviation from the specified trajectory and indicating in the field of view the director index for thrust control. The task of the pilot is to bring the index to zero by manipulating the power lever and thereby zeroing the piloting error. The solution of the task is achieved by using an original energy approach. The mathematical formulation of the approach is the energy balance equation. A variant of the structure of the energy control system and a prototype of a navigation indicator with a director index is proposed. The results of flights along the route using the director index are presented in the form of graphs and numerical estimates.
Two-dimensional ionospheric radio-tomography by nanosatellite constellation receiving signals from the GLONASS navigation system
Authors: Belokonov I V , Filonin O V , Nikolaev P N 
Published: November 2020

AbstractIn this paper, we consider an approach to radiotomographic monitoring of the ionosphere by a constellation of nanosatellites with receiving equipment for L-band navigation signals on its satellites. We choose the constellation orbit and the angular position of nanosatellites on the orbit to obtain an acceptable latitudinal resolution of measurements equal to 7.5 degrees. The final sounding geometry makes it possible to obtain the first measurements in less than 3.5 minutes, and the full cycle of measurements is obtained in 74 minutes, which makes it possible to reconstruct the electron density of the ionosphere in the orbital plane in the altitude range from 200 to 500 km.
Motion control of the spacecraft with a low thrust engine during flight to near-Earth asteroids
Authors: Chekashov A S , Starinova O L , Sergaeva E A , Danhe C 
Published: November 2020

Abstract
This work aims to simulate the flight of a spacecraft with an electric propulsion system to the near-Earth asteroid 2011ES4. A control law was formed that ensures the minimum fuel consumption when the engine is running without shutdowns. The simulation of the flight of the spacecraft to the point of the asteroid’s orbit closest to the Earth is carried out. An additional study was also carried out, which simulates the flight of a spacecraft with a liquid-propellant engine. A comparison of the flight simulation results using two different propulsion systems was made. A comparison of the mass flow rate, the relative velocity between the spacecraft and the asteroid, and the flight times using these propulsion systems is made.
Cement Concrete Modular Pavement Implementation for Pedestrian and Bicycle Path
Authors: Vaitkus A , Gražulytė J , Vorobjovas V , Šernas O , Žalimienė L 
Published: November 2020

Abstract
Cement concrete modular pavements, also known as precast concrete pavements, designed for pedestrian and bicycle paths is the advanced next-generation technology characterised as high quality, durable, quickly built and easily maintained. Polypropylene fibre reinforced concrete mixture is more frequently used to improve the properties of concrete slabs and to reduce thickness. The thickness of the slab could be reduced to 8–10 cm using the appropriate fibre. This paper focuses on the selection of slab dimensions and verification of fibre reinforced concrete mixture production method when fibres are added to the factory-made concrete mixture (available from the concrete plant) and evaluation of different surface texture of concrete slabs produced by using special texture mats. Seven different combinations of concrete slabs have been developed, constructed and tested in 21 m length pedestrian pathway in Vilnius city. The analysis of mechanical and surface characteristics of these slabs are presented in this paper. The research revealed that the most suitable (pendulum test values ≥ 55) surface texture for the pedestrian pathway is formed by using texture mats.
Effects of New Modification and Refinement Techniques of Mechanical Properties and Corrosion Behaviours of Al-Si Alloys
Authors: Hussein Hussein. A. , Kahdim Mohammed. J. , Atiyah Alaa. A. 
Published: November 2020

Abstract
In this paper, the effects of new techniques of phosphor-doped elements on the microstructure and mechanical properties of Al-%Si alloy to produce modifier compounds were studied. The modifiers were produced by developing a new technique and additions field (nano- doped metals) under as-cast conditions. The results show that the addition of CuPO4, Ni3(PO4)2 and Ca3(PO4)2 to the Al-Si alloys can change (refine) the primary Si phases and are less angular. In addition, the eutectic Si form has changed from a long needle-like to a fibrous shape. The modified Al-Si alloys have microstructures in the inter-dendrite region consisting of a uniformly distributed α-Al phase, eutectic Al-Si, and fine primary Si particles. The microstructure showed that the primary silicon fraction decreased 60% with increased phosphate elements content. The finest microstructure could be observed with a 0.03% addition of doped metals. Good enhancements in ultimate tensile strength and elongation with clear increases in the hardness were observed, reaching 55%, 9% and 30%, respectively. Moreover, additions give the possibility of changing corrosion behaviours from pitting corrosion to micro and general corrosion. Furthermore, the optimal holding and melting temperature is 780°C, with a holding time of 15 minutes.
The effect of different at.% Ag elements on the wear rate of nitinol alloys fabricated using the casting method
Authors: Hussein Saja Mohammed , Salman Khansaa D , Hussein Ahmed Abdulqader 
Published: November 2020

Abstract
Shape memory alloys are considered smart alloys due to their properties, such as biocompatibility, superelasticity (SE) and shape memory effect (SME). These alloys are used in many applications (actuators, MEMS, biomedical and aerospace). In this work, the effect of adding the silver element to the NiTi alloy with different atomic percentages (zero, one, two and three at.% Ag) on mechanical properties, such as macrohardness and wear, was studied. The samples of this work were prepared by the casting method using a VAR furnace to obtain homogeneous shape memory alloys. The purity of the elements was Ni 99.2 %, Ti 99.7 % and Ag 99.99 %. In this work, many examinations were carried out to define the characteristics of the manufactured shape memory alloys, such as FESEM and OM, for microstructural analysis. Meanwhile, the mechanical properties were defined using macrohardness and wear tests. The results of the mechanical tests showed a slight impact in the percentage of the wear resistance and macrohardness at the point of increasing the silver element ratio to the binary alloy (NiTi). The photomicrographs of the OM and FESEM examinations showed that the Ag element is homogeneously distributed in the NiTi matrix. In addition, the FESEM examination showed the emergence of the martensite phase, austenite phase and some impurities. The results of the DSC test showed the degrees of the phase transformation for each alloy, and the SME recovery rate of 89.99% was achieved. Furthermore, the surface topography was analysed using an optical microscope for all the tested samples. The obtained results emphasised that the movement between the disc and the pins leads to a rise in the friction temperature and the formation of the layer of oxidation. These oxidation layers will be ploughed and uprooted to create many grooves at the surface of the samples. Hence, these grooves are similar for all samples and increased with increasing loads.
Modelling Low Velocity Impact on Structural Composites
Authors: Yeager M , Boyd S E , Staniszewski J M , Patterson B A , Knorr D B , Bogetti T A 
Published: November 2020

Abstract
Insertion of composite materials into next generation vehicles requires an understanding of their response over the range of relevant loading conditions encountered in the field. This paper focuses on modelling the low velocity, high energy impact on structural composite materials. An experimental procedure, using the four quadrant impact methodology, is presented to characterize composite material response and damage during these events. A model is developed and verified (within 9% for peak force and peak deflection) to predict the composite response to low velocity, high energy events. The model is then exercised to gain a deeper understanding about how mechanical and damage properties influence the structural response of the composite. The model was most sensitive to delamination failure stress, which changed the damage area by a factor of 8 over the range of values examined. Through investigating the effect of boundary conditions, a 67% increase in peak force was found by switching from simply supported to clamped. This work demonstrates a first level analysis and model to predict the composite response to low velocity, high energy loading conditions.
Assessment of some mechanical properties of PMMA/silica/zirconia nanocomposite as a denture base material
Authors: Fatalla Abdalbseet A , Tukmachi Mustafa S. , Jani Ghasak H 
Published: November 2020

Abstract
In this research, nanocomposites of poly(methyl methacrylate) (PMMA) and a mixture of nano silica (SiO2) and nano zirconia (ZrO2) were prepared in different weight percentages of the nano fillers to improve some of the properties of PMMA resin to be used as a denture base material. The nano filles were surface modified with a coupling agent and added to the PMMA in different amounts. Impact strength, transverse strength, hardness and roughness were tested for both control and experimental groups. The results indicate that PMMA/silica/zirconia nanocomposites, prepared with 5% by weight of both types of fillers, had a slight increase in impact strength, transverse strength and hardness with only an insignificant increase in roughness. This kind of composite material may have the potential for application in dental practice.
Erotic Art as Proprioceptive Art
Authors: Benovsky Jiri 
Published: November 2020

Abstract
The philosophical discussion about erotic art has often been understood in terms of the possibility of erotic art as a form of visual or auditory art. In this article, I focus on erotic experiences qua proprioceptive experiences and I defend the claim that, under the right circumstances, such experiences can bring about proprioceptive artworks.
Comparison of Skin Antiseptic Agents and the Role of 0.01% Hypochlorous Acid
Authors: Tran Ann Q , Topilow Nicole , Rong Andrew , Persad Patrice J , Lee Michael C , Lee James H , Anagnostopoulos Apostolos G , Lee Wendy W 
Published: November 2020

Abstract

Background
Hypochlorous acid (HA) has both anti-microbial and wound-healing properties with a growing role for utilization in pre-procedural care on the face.

Objectives
The authors sought to compare the antiseptic property of 0.01% HA solution, 5% povidone iodine (PI), 4% chlorhexidine gluconate (CHG), and 70% isopropyl alcohol (IPA) antiseptic on facial skin.

Methods
This was a prospective single-center clinical trial.

Results
A total of 21 participants were recruited. Bacterial growth was seen in CHG (10%), IPA (71%), PI (81%), and HA (95%) of specimens (P &lt; 0.001). CHG had less growth compared with HA (P = &lt;0.001), IPA (P = &lt;0.001), and PI (P = &lt;0.001). No difference in bacterial growth was noted between HA and IPA (P = 0.063) or HA and PI (P = 0.25). Significant differences in mono-microbial and poly-microbial growth were seen between HA and IPA (P = 0.046) and HA and CHG (P = &lt;0.001). Staphylococcus epidermidis grew less frequently in CHG (10%), followed by IPA (29%), PI (71%), and HA (71%). Staphylococcus capitis grew less frequently in CHG (0%), followed by PI (14%), HA (24%), and IPA (29%).

Conclusions
CHG reduced the bacterial growth compared with HA, PI, and IPA. However, HA, PI, and IPA had insignificant differences in bactericidal effects. Our study provides a supporting role of HA to be considered as an antiseptic.

Level of Evidence: 2
Understanding Breast Implant Illness
Authors: Newby Jill M , Tang Samantha , Faasse Kate , Sharrock Maria J , Adams William P 
Published: November 2020

Abstract

Background
Breast implant surgery is the most common plastic surgery procedure performed globally. A subset of women with breast implants report experiencing a myriad of disabling and distressing physical and psychological symptoms attributed to their implants. Social media groups have coined the condition “breast implant illness” (BII). Little to no scientific research currently exists for BII.

Objectives
The aim of this study was to investigate the experiences of women with BII (both those with implants still in place and those who have explanted) and compare them with those of a control group of women with implants who do not report BII.

Methods
Women with self-reported BII and implants still in place (n = 51), self-reported BII who had explanted (n = 60), and women with implants in place without BII (n = 58) completed online self-report questionnaires about their symptoms, physical and mental health, health service use patterns, and lifestyle factors (eg, exercise, smoking, alcohol consumption).

Results
Women with BII, regardless of whether they had undergone explant surgery, reported experiencing more severe somatic symptoms, higher depression, anxiety and health anxiety, and poorer physical health than women without BII.

Conclusions
These findings highlight the need for further investigation into the causes, risk factors, long-term effects, and potential interventions for women who experience BII.
Identifying the natural polyphenol catechin as a multi-targeted agent against SARS-CoV-2 for the plausible therapy of COVID-19: an integrated computational approach
Authors: Mishra Chandra Bhushan , Pandey Preeti , Sharma Ravi Datta , Malik Md Zubbair , Mongre Raj Kumar , Lynn Andrew M , Prasad Rajendra , Jeon Raok , Prakash Amresh 
Published: November 2020

AbstractThe global pandemic crisis, coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has claimed the lives of millions of people across the world. Development and testing of anti-SARS-CoV-2 drugs or vaccines have not turned to be realistic within the timeframe needed to combat this pandemic. Here, we report a comprehensive computational approach to identify the multi-targeted drug molecules against the SARS-CoV-2 proteins, whichare crucially involved in the viral–host interaction, replication of the virus inside the host, disease progression and transmission of coronavirus infection. Virtual screening of 75 FDA-approved potential antiviral drugs against the target proteins, spike (S) glycoprotein, human angiotensin-converting enzyme 2 (hACE2), 3-chymotrypsin-like cysteine protease (3CLpro), cathepsin L (CTSL), nucleocapsid protein, RNA-dependent RNA polymerase (RdRp) and non-structural protein 6 (NSP6), resulted in the selection of seven drugs which preferentially bind to the target proteins. Further, the molecular interactions determined by molecular dynamics simulation revealed that among the 75 drug molecules, catechin can effectively bind to 3CLpro, CTSL, RBD of S protein, NSP6 and nucleocapsid protein. It is more conveniently involved in key molecular interactions, showing binding free energy (ΔGbind) in the range of −5.09 kcal/mol (CTSL) to −26.09 kcal/mol (NSP6). At the binding pocket, catechin is majorly stabilized by the hydrophobic interactions, displays ΔEvdW values: −7.59 to −37.39 kcal/mol. Thus, the structural insights of better binding affinity and favorable molecular interaction of catechin toward multiple target proteins signify that catechin can be potentially explored as a multi-targeted agent against COVID-19.
EZH2 is essential for spindle assembly regulation and chromosomal integrity during porcine oocyte meiotic maturation†
Authors: Cai Qingqing , Wen Keying , Ma Miao , Chen Wei , Mo Delin , He Zuyong , Chen Yaosheng , Cong Peiqing 
Published: November 2020

Abstract
Enhancer of zeste homolog 2 (EZH2) has been extensively investigated to participate in diverse biological processes, including carcinogenesis, the cell cycle, X-chromosome inactivation, and early embryonic development. However, the functions of this protein during mammalian oocyte meiotic maturation remain largely unexplored. Here, combined with RNA-Seq, we provided evidence that EZH2 is essential for oocyte meiotic maturation in pigs. First, EZH2 protein expression increased with oocyte progression from GV to MII stage. Second, the siRNA-mediated depletion of EZH2 led to accelerated GVBD and early occurrence of the first polar body extrusion. Third, EZH2 knockdown resulted in defective spindle assembly, abnormal SAC activity, and unstable K-MT attachment, which was concomitant with the increased rate of aneuploidy. Finally, EZH2 silencing exacerbated oxidative stress by increasing ROS levels and disrupting the distribution of active mitochondria in porcine oocytes. Furthermore, parthenogenetic embryonic development was impaired following the depletion of EZH2 at GV stage. Taken together, we concluded that EZH2 is necessary for porcine oocyte meiotic progression through regulating spindle organization, maintaining chromosomal integrity, and mitochondrial function.
‘Jack of All Trades and Master of None’? Exploring Social Work’s Epistemic Contribution to Team-Based Health Care
Authors: Cootes Hannah , Heinsch Milena , Brosnan Caragh 
Published: November 2020

Abstract
From its inception, the social work profession evolved in tandem with public health, and has historically contributed to public health efforts to restore, protect and promote public health principles. In recent times, however, the most prominent role for health-related social work is in hospital-based, multidisciplinary teams. Curiously, scant attention has been paid to the place of social workers’ knowledge—their ‘epistemic contribution’—within this medical context. This article reports the findings of a scoping review that examined the role and function of social work knowledge in healthcare teams. Thematic analysis of the literature revealed four key themes: (i) a lack of clarity and visibility—‘Ok, what is my role?’; (ii) knowledge Hierarchies—‘Jack of all trades and master of none’?; (iii) mediator and educator—‘Social work is the glue’ and (iv) public health principles—‘We think big’. Findings show that despite social work’s epistemic confidence, and alliance with broader public health principles and aims, its knowledge can be marginalised and excluded within the multidisciplinary team context. The article introduces Fricker’s theory of ‘Epistemic Injustice’ as a novel framework for inquiry into health care teams, and the mobilisation of social work knowledge within them.