bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of nafen nanoparticles on the strength of nickel
Authors: Agureev L E , Ivanov B S , Savushkina S V , Laptev I N , Kanushkin A I , Sivtsova G V 
Published: December 2020

Abstract
The article presents the results of studies of the structure and properties of pure nickel with the addition of nanofibers of aluminum oxide – nafen. The samples were obtained by spark plasma sintering of mechanically activated metal powder. The effect of nanofibers on Young’s modulus and ultimate strength of nickel at 25 °C and elevated temperatures is considered.
Formation of the titanium-aluminum intermetallic compounds by ion-beam mixing
Authors: Bykov P V , Vorob’ev V L , Klimova I N , Kolotov A A , Drozdov A Yu , Bayankin V Ya , Alexandrova S S 
Published: December 2020

Abstract
The results of studying the X-ray photoelectron spectroscopy of the chemical composition formation of titanium surface layers with a deposited aluminum film after ion-beam mixing are presented. At the selected parameters of ion irradiation, the aluminum films 10 and 20 nm thick are mixed with a titanium substrate. TiAl compounds are formed during mixing.
The correlation of the parameters of the melt pool with the form of the track in the technology of laser metal deposition
Authors: Dubrov A V , Zavalov Yu N 
Published: December 2020

Abstract
The temporal dependence of parameters of the melt pool (MP) during the formation of the track in the process of laser metal deposition (LMD) was obtained. The video monitoring in the LMD process was used by the coaxial scheme with the frame rate of up to 3 kHz and the spatial resolution of down to 10 μm. The technique was developed to process video data, to analyse images of the illuminated area in LMD process and to determine the MP key characteristics. The method of the MP – contouring detects areas of solid material with high intensity due to differences in the emissivity of the material in images and to exclude them from consideration. 3D approximation of the tracks was made using the interferometric profilometer. The correlation analysis of the relationship between the geometric characteristics of the track and the characteristics of the MP was carried out. The maxima of the correlation of the height of the track profile and the MP width is detected on the scale of (0.1…1) mm. The additional conditions should be investigated to establish the reliable correlation between the deviations observed in the experiment.
Surface charge of polymer materials modified by nanostructured fluorocarbon coatings
Authors: Elinson V M , Shchur P A , Kukushkin D Yu 
Published: December 2020

Abstract
The paper presents the results of a study of the surface charge of polymer materials modified with fluorocarbon films formed by ion-plasma technology at different CF4 contents in the CF4 + CeH12 plasma mixture. Nanostructured fluorocarbon films formed on the surface of polyethyleneterephthalate and polystyrene have a positive charge in the region of “transient” processes, and films on the surface of polytetrafluoroethylene have a negative charge, which is associated with different topology of the relief on the surface of these polymers, as well as their polarity.
Methods for forecasting and control of the phase composition and residual voltage in Al-Cu-Li alloys in friction mixing welding
Authors: Gordeeva MI 
Published: December 2020

Abstract
One of the main directions for reducing the weight of structures of aerospace engineering products is the use of aluminum-lithium alloys, which have unique characteristics of strength, rigidity and fracture toughness [1–3]. Nevertheless, the manufacture of large-sized welded structures from high-strength aluminum-lithium alloys is associated with serious problems due to their softening under the influence of the thermal cycle of fusion welding, for which the joint strength coefficient (the ratio of the weld strength to the strength of the base material) is below 60% [4, 5]… It is possible to increase the operational characteristics of welded joints through the use of new effective technological processes, such as friction stir welding (FWW) [6].
The effect of plasma electrolytic polishing on the surface properties of nitrocarburised steel
Authors: Kusmanov S A , Tambovskiy I V , Silkin S A , Korableva S S , Belov R D , Belkin P N 
Published: December 2020

Abstract
The effect of anodic plasma electrolytic polishing on the characteristics of low carbon steel (0.2 % C) after nitrocarburising was investigated. The formation of the modified layer including a hardened diffusion layer and a surface oxide layer occurs as a result of anodic plasma electrolytic nitrocarburising in an aqueous solution of glycerol (8 %), ammonium nitrate (5 %) and ammonium chloride (15 %) at 850 °C. Conducting a plasma electrolytic polishing of the surface leads to the removal of a loose part of the oxide layer (predominantly FeO), which affects the reduction the surface roughness of 2 times. The rate of the weight loss of steel in this process is 0.5 mg/s. The corrosion current density in a 3.5 % sodium chloride solution decreases from 41.0 μA/cm2 in an untreated sample to 32.6 μA/cm2 in the steel after nitrocarburising and polishing during 30 s and to 22–24 μA/cm2 when the second operation lasted 60-300 s due to the protective action of the nitride zone and the dense part of the oxide layer. Wear test shows that plasma electrolytic polishing enhances the wear resistance of a nitrocarburised sample by 1.8 times.
Interaction of cathode spots of a vacuum-arc discharge with a metal surface during its deactivation
Authors: Kuznetsov V G 
Published: December 2020

Abstract
For the first time, the possibility of deactivation of a metal surface by the dry method by means of treatment with cathode spots of a vacuum-arc discharge is shown. A high deactivation coefficient is obtained by squeezing the liquid phase of the metal from the cathode spot with a high pressure created by the plasma flow at the base of the cathode jet. Some principles of controlling the movement of cathode spots of a vacuum arc on the surface are shown.
Study of the influence of bias voltage on the texture and residual stresses of Mo coatings deposited on a Cu substrate by magnetron sputtering deposition
Authors: Lozovan A A , Betsofen S Ya , Labutin A A , Lenkovets A S , Bespalov A V , Grushin I A 
Published: December 2020

Abstract
The paper presents the results of studying the effect of the bias voltage on the structure, texture, and residual stresses of Mo coatings deposited on a copper substrate using an inverted magnetron. It is shown that variations in the bias voltage lead to changes in the texture and thickness of the Mo coatings. It was found that an increase in the bias voltage leads to an increase in the values of the compressive residual stresses.
Tribological properties of solid lubricating coatings of the TiN-Pb system at various Pb content
Authors: Lyakhovetskiy M A , Lozovan A A , Lesnevskiy L N , Nikolaev I A , Pavlov Yu S 
Published: December 2020

Abstract
The paper presents the results of the investigation of the solid lubricant coatings (SLC) tribological properties based on a TiN matrix with various content of Pb (13,16 and 22 at. %) in monolayer design. The results of the study of its morphology, elemental composition and tribological properties are provided. It is shown that the increase of the Pb content from 13 to 22 at. % lead to increase of CoF and decrease the wear resistance.
Integrated network analysis reveals new genes suggesting COVID-19 chronic effects and treatment
Authors: Pavel Alisa , del Giudice Giusy , Federico Antonio , Di Lieto Antonio , Kinaret Pia A S , Serra Angela , Greco Dario 
Published: December 2020

AbstractThe COVID-19 disease led to an unprecedented health emergency, still ongoing worldwide. Given the lack of a vaccine or a clear therapeutic strategy to counteract the infection as well as its secondary effects, there is currently a pressing need to generate new insights into the SARS-CoV-2 induced host response. Biomedical data can help to investigate new aspects of the COVID-19 pathogenesis, but source heterogeneity represents a major drawback and limitation. In this work, we applied data integration methods to develop a Unified Knowledge Space (UKS) and used it to identify a new set of genes associated with SARS-CoV-2 host response, both in vitro and in vivo. Functional analysis of these genes reveals possible long-term systemic effects of the infection, such as vascular remodelling and fibrosis. Finally, we identified a set of potentially relevant drugs targeting proteins involved in multiple steps of the host response to the virus.
Suppression of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) After a Second Wave in Victoria, Australia
Authors: Giles Michelle L , Wallace Euan M , Alpren Charles , Brady Nicole , Crouch Simon , Romanes Finn , Sutton Brett , Cheng Allen 
Published: December 2020

Abstract
Countries worldwide are experiencing a second wave of coronavirus disease 2019 (COVID-19), which is proving to be difficult to control. We describe the combination of physical distancing, mandatory mask wearing, movement restrictions, and enhanced test, trace, and isolation efforts that can be used to successfully suppress community transmission to zero.
Influence of Soil Moisture Zones on Rice Water Weevil (Coleoptera: Curculionidae) Populations in Furrow Irrigated Rice
Authors: Kelly F R , Gore J , Cook D , Catchot A L , Golden B R , Krutz L J , Crow W D , Towles T B 
Published: December 2020

Abstract
Water conservation is an important factor for production of rice in the United States because of declining aquifer levels, but little research has been done to evaluate insect management in rice systems integrating water conservation practices. Rice water weevil, Lissorhoptrus oryzophilus Kuschel, is an important insect pest of rice in the U.S. Rice water weevil is a semiaquatic species that relies on flooded conditions to complete larval development, so water conservation practices are likely to impact their pest status. The study was conducted across the Mississippi River alluvial floodplain to compare rice water weevil population densities in different zones of a furrow irrigated rice field to a conventionally flooded rice field. All locations were sampled at 3, 4, and 5 wk after the initial irrigation. Larval densities were greatest in the lower end of furrow irrigated fields and in the adjacent flooded rice field compared with the upper and middle sections that did not hold standing water when averaged across three sample dates. Also, rice water weevil densities were greater during week five than week three. In terms of rice yields, the top third of furrow irrigated rice fields, the section that remained mostly dry, produced lower rough rice yields than all other sections and the flooded field. These results suggest that rice water weevil populations can be lower in a furrow irrigated rice system. As a result, more research is needed to determine whether a spatial management plan can be developed based on soil moisture zones in furrow irrigated rice.
Mesalazine-induced myopericarditis: a case report
Authors: Shergill Simran 
Published: December 2020

Abstract

Background
Mesalazine is a well-established 1st line treatment for inflammatory bowel disease (IBD). Cardiotoxicity following 5-aminosalicyclic-acid therapy remains a rare yet serious complication and can often be challenging to distinguish from myocarditis presenting as an extra-intestinal manifestation of IBD.

Case summary
We present a case of a 22-year-old man with a background of ulcerative colitis commenced on a mesalazine preparation for disease progression. He presented to our hospital 12 days following drug initiation with acute chest pain, peak troponin-T of 242 ng/L, dynamic electrocardiogram changes, and severe left ventricular systolic dysfunction on transthoracic echocardiogram. The clinical diagnosis of myopericarditis was suspected and mesalazine was stopped shortly after. Outpatient cardiac magnetic resonance performed 2 weeks following mesalazine cessation demonstrated a recovery of cardiac function with associated symptom and biochemical resolution.

Discussion
Clinicians should be aware of this potentially fatal adverse effect of a commonly prescribed medication. Symptoms of myocarditis often occur within the early stages of mesalazine initiation, which aids the clinical diagnosis. The mainstay of treatment is to simply discontinue the drug with rapid resolution of symptoms seen without any permanent or long-term cardiac dysfunction. Close liaison with the gastroenterology team is key, as 2nd line IBD therapies are often required for the ongoing management of the patient’s colitis.
Dento-skeletal effects produced by rapid versus slow maxillary expansion using fixed jackscrew expanders: a systematic review and meta-analysis
Authors: Rutili Valentina , Mrakic Giorgia , Nieri Michele , Franceschi Debora , Pierleoni Felicita , Giuntini Veronica , Franchi Lorenzo 
Published: December 2020

SummaryBackgroundNo systematic review and meta-analysis of dento-skeletal effects following rapid maxillary expansion (RME) and slow maxillary expansion (SME) using the same jackscrew expander with different activation protocols is available.ObjectiveTo compare dento-skeletal effects produced by RME with those induced by SME using the same fixed jackscrew expanders in growing patients.Search methodsPubMed (MEDLINE), Cochrane Library, Scopus, Embase, and OpenGrey were searched with no language or publication date restrictions.Selection criteriaOnly randomized controlled trials (RCTs) were selected and the following inclusion criteria were used: growing patients in mixed or permanent dentition, with maxillary transverse discrepancy, dental crowding, and treated with fixed jackscrew maxillary expander (e.g. Hyrax, Haas) activated to achieve either RME or SME.Data collection and analysisData were extracted by two independent reviewers. The quality of the included RCTs was assessed according to the Cochrane risk-of-bias tool for randomized trials (RoB 2.0). For the aggregation of continuous data, the mean of the differences (MD) between treatments was used. A random effect model was applied.ResultsFrom 4855 retrieved articles, 3 studies were selected, 1 at unclear risk and 2 at high risk of bias. Maxillary intermolar distance showed no significant differences between the two modalities of expansion [pooled MD = 0.99 mm favouring RME, with 95% confidence interval (CI) = −2.09 to 4.06, P = 0.53, I2 = 90%]. As for maxillary molar inclination measured as the angle formed by the axes passing through the disto-buccal cusps and the apexes of the palatine root of the first upper molars, it was significantly smaller in the SME group (MD = −11.51°, with 95% CI = −15.23 to −7.79, P &lt; 0.0001). Posterior maxillary expansion was significantly greater in RME than SME (pooled MD = 0.75 mm, with 95% CI = 0.27–1.23, P = 0.002, I2 = 0%).ConclusionsBoth RME and SME produce an effective dento-skeletal expansion of the maxilla. RME is slightly more effective in increasing the posterior transverse skeletal width of the maxilla while SME induces smaller molar inclination.RegistrationPROSPERO CDR42018105530.
Parliament2: Accurate structural variant calling at scale
Authors: Zarate Samantha , Carroll Andrew , Mahmoud Medhat , Krasheninina Olga , Jun Goo , Salerno William J , Schatz Michael C , Boerwinkle Eric , Gibbs Richard A , Sedlazeck Fritz J 
Published: December 2020

Abstract

Background
Structural variants (SVs) are critical contributors to genetic diversity and genomic disease. To predict the phenotypic impact of SVs, there is a need for better estimates of both the occurrence and frequency of SVs, preferably from large, ethnically diverse cohorts. Thus, the current standard approach requires the use of short paired-end reads, which remain challenging to detect, especially at the scale of hundreds to thousands of samples.

Findings
We present Parliament2, a consensus SV framework that leverages multiple best-in-class methods to identify high-quality SVs from short-read DNA sequence data at scale. Parliament2 incorporates pre-installed SV callers that are optimized for efficient execution in parallel to reduce the overall runtime and costs. We demonstrate the accuracy of Parliament2 when applied to data from NovaSeq and HiSeq X platforms with the Genome in a Bottle (GIAB) SV call set across all size classes. The reported quality score per SV is calibrated across different SV types and size classes. Parliament2 has the highest F1 score (74.27%) measured across the independent gold standard from GIAB. We illustrate the compute performance by processing all 1000 Genomes samples (2,691 samples) in &lt;1 day on GRCH38. Parliament2 improves the runtime performance of individual methods and is open source (https://github.com/slzarate/parliament2), and a Docker image, as well as a WDL implementation, is available.

Conclusion
Parliament2 provides both a highly accurate single-sample SV call set from short-read DNA sequence data and enables cost-efficient application over cloud or cluster environments, processing thousands of samples.
Relative earthquake location procedure for clustered seismicity with a single station
Authors: Grigoli Francesco , Ellsworth William L , Zhang Miao , Mousavi Mostafa , Cesca Simone , Satriano Claudio , Beroza Gregory C , Wiemer Stefan 
Published: December 2020

SUMMARYEarthquake location is one of the oldest problems in seismology, yet remains an active research topic. With dense seismic monitoring networks, it is possible to obtain reliable locations for microearthquakes; however, in many cases dense networks are lacking, limiting the location accuracy, or preventing location when there are too few observations. For small events in all settings, recording may be sparse and location may be difficult due to low signal-to-noise ratio. In this work, we introduce a new, distance-geometry-based method to locate seismicity clusters using only one or two seismic stations. A distance geometry problem consists in determining the location of sets of points based only on the distances between member pairs. Applied to seismology, our approach allows earthquake location using the interevent distance between earthquake pairs, which can be estimated using only one or two seismic stations. We first validate the method with synthetic data that resemble common cluster shapes, and then test the method with two seismic sequences in California: the August 2014 Mw 6.0 Napa earthquake and the July 2019 Mw 6.4 Ridgecrest earthquake sequence. We demonstrate that our approach provides robust and reliable results even for a single station. When using two seismic stations, the results capture the same structures recovered with high-resolution double-difference locations based on multiple stations. The proposed method is particularly useful for poorly monitored areas, where only a limited number of stations are available.
Synergistic Effects of the Red Light and Blue Traps on Control of Thrips palmi (Thysanoptera: Thripidae)
Authors: Murata Mika , Yamahama Yumi , Hariyama Takahiko 
Published: December 2020

Abstract
The melon thrips (Thrips palmi) is a serious insect pest of vegetables and ornamental plants. To control and monitor this thrips, blue traps are widely used. We previously reported that irradiation of cucumber plants with red light-emitting diodes (660 nm) causes T. palmi to avoid the plants. Here, we evaluated the responses of T. palmi adults to a cucumber plant in an experimental arena with either a transparent sticky trap or a blue sticky trap, without or with illumination by a red LED panel. When T. palmi were introduced into the arena, the number of thrips attracted to the plant was lowest in treatments using the red light and blue trap. On the other hand, when T. palmi were inoculated on plants first, most thrips stayed put on the plants. Placing both red LEDs and blue sticky traps in greenhouses before the thrips invade the greenhouse from the outside might effectively control T. palmi.
Leiomyosarcoma of the spermatic cord presenting as an incarcerated inguinal hernia: a rare presentation of a rare condition
Authors: Christodoulidis Gregory , Samara Athina Α , Perivoliotis Konstantinos , Floros Theodoros , Volakakis Georgios , Magouliotis Dimitrios E , Papamichali Roidoula , Tepetes Konstantinos 
Published: December 2020

Abstract
Leiomyosarcomas of the spermatic cord are rare malignancies with only sporadic cases (less than 150) reported in the literature. Preoperative diagnosis of a paratestical leiomyosarcoma is challenging. Clinicians do not typically consider inguinoscrotal lumps as underlying sarcomas due to their relatively low prevalence compared with hernias. As a result the diagnosis of a sarcoma of the paratesticular area is often hard to reach. Herein, we report a rare case of a leiomyosarcoma originating from the spermatic cord, masquerading as a strangulated inguinal hernia. Intraoperatively, a mass arising from the spermatic cord was found and excised. A supplementary orchiectomy with high ligation of the spermatic cord was also performed.
Assessing the response of odonates (dragonflies and damselflies) to a tropical urbanization gradient
Authors: Jere Arjit , Darshetkar Apeksha , Patwardhan Ankur , Koparde Pankaj 
Published: December 2020

Abstract
Understanding species responses to urbanization is important to realize their specific conservation needs. Odonates (dragonflies and damselflies) are freshwater insects perceived as good ecological indicators. To investigate responses of tropical odonates to an urbanization gradient, we sampled adult odonates along an urbanization gradient at six sites along the Mula River across Pune City, Maharashtra, India. For species–habitat analysis, we first performed a variable reduction using principal component analysis. we analyzed species–habitat data using redundancy analysis and canonical correspondence analysis. We documented 15 odonates across 6 sites. Our statistical analyses on patterns of odonate assemblages across sites and environmental variables did not return significant results. However, we detected site-exclusivity in a few species based on occurrence data and identified urban sensitive, urban tolerant and generalist species. We found that the odonate diversity was highest at a moderately urbanized site. We believe that increase in diversity due to moderate amounts of disturbance can be explained by the intermediate disturbance hypothesis. Based on our data, we suggest that for the conservation of odonates in the urban context, anthropogenic disturbance needs to be regulated. Here, we demonstrate that understanding species–habitat associations is the first step towards understanding their ecological and conservation requirements. To conserve odonates and rivers in metropolitan cities like Pune, restoring original river-side habitat and reducing the disturbance at highly urbanized sites to at least intermediate levels needs to be done on an urgent basis.
enckehh: an integrator for gravitational dynamics with a dominant mass that achieves optimal error behaviour
Authors: Hernandez David M , Holman Matthew J 
Published: December 2020

ABSTRACT
We present enckehh, a new, highly accurate code for orbital dynamics of perturbed Keplerian systems such as planetary systems or galactic centre systems. It solves Encke’s equations of motion, which assume perturbed Keplerian orbits. By incorporating numerical techniques, we have made the code follow optimal roundoff error growth. In a 1012 d integration of the outer Solar system, enckehh was 3.5 orders of magnitude more accurate than ias15 in a fixed timestep test. Adaptive steps are recommended for ias15. Through study of efficiency plots, we show that enckehh reaches significantly higher accuracy than the rebound integrators ias15 and whckl for fixed step size.