bluuebunny/crossref_metadata_2025_split huggingface dataset:
Friction and wear behavior of WC-Ni coatings HVOF sprayed on duplex stainless steel
Authors: Xu H S , Dong Q 
Published: March 2020

Abstract
The friction and wear behavior of high-velocity oxygen-fuel (HVOF) sprayed WC-Ni coatings was investigated. WC-Co coating was used as reference sample. Pin-on-disc tests were conducted on WC-Ni and WC-Co coatings surface in both pure water and 3.5% (wt.) saline solution, respectively. It was found that WC-Co coatings has superior wear and corrosion resistance in pure water due to their high hardness. However, cracks were observed in the wear scar of WC-Co coating, which wear rate was 2-4 times higher than that of WC-Ni coatings. The corrosion-wear resistance is not only affected by coating hardness, but also by powder composition. So WC-CrNi coating displays an excellent wear-and corrosion-resistance performance in saline solution.
Erosion behavior and damage evolution of Ti-6Al-4V aero-engine titanium alloy
Authors: Li Y Q , Wang X D , Long C B , Sun Z P , Wei X L , Zhou L C 
Published: March 2020

Abstract
This paper studies sand-and dust-erosion damages of aero-engine titanium alloy blades, and associated damage mechanism was discussed with the simulation of actual dust environment. The abrasion test of TC4 titanium alloy was carried out by high-speed erosion equipment. The roughness, micro-damage morphology, and stress distribution of titanium alloy were characterized by the roughness tester, SEM and XRD residual stress gauges, respectively. The results show that the erosion rate of titanium alloy matrix increases with the erosion time, while its roughness does not vary significantly. However, the roughness and residual compressive stress sharply rise with erosion rate. As the erosion time progresses, the surface morphology exhibits cutting wear, and the worn surface center starts to peel off.
Acoustic emission-based real-time monitoring of fatigue damage evolution of T800 carbon fiber/bismaleimide composites
Authors: Qi X F , Yang Y , Kang W P , Wang Q , Zhao G 
Published: March 2020

Abstract
For the damage mode recognition in the fatigue coupon test of T800 carbon fiber/bismaleimide, the acoustic emission is employed. However, the latter application is hindered by noises produced by various environmental factors, which may suppress damage-induced ones. In this study, external noises are effectively reduced by the absorbing adhesive. For damage mode recognition, an integrated strategy is proposed, which features a combination of a characteristic signal extraction and damage mechanism analysis via piezoelectric and fiber Bragg grating sensors. The final verification shows that the different damage modes of the composite specimen can be clearly distinguished based on this method.
Multidisciplinary design optimization analysis of pin fins based on the Monte Carlo simulation
Authors: Zhao Z Y , Hu W B , Wang J B 
Published: March 2020

Abstract
For aero-engines, pin fins improve the heat exchange efficiency of blades but increase their mass. To reduce the mass of blades, three types of pin fin models (diamond, elliptical, and rectangular) were used in this paper to analyze the stress distribution under the combined action of temperature and centrifugal force. The maximum stress was used as the constraint condition in these models. With the aim of mass optimization, these models were subjected to the multidisciplinary design optimization based on the Monte Carlo simulation. After the optimization via diamond, elliptical, and rectangular models, the pin fin mass was reduced by 15.42, 19.42, and 16.03%, respectively.
Study of dynamical mechanical properties and dislocation dynamics of copper single crystals by discrete dislocation dynamics simulation
Authors: He S L , Jiang W T , Bai J S , Zhang M Y , Fan H D 
Published: March 2020

Abstract
In this work, the dynamical mechanical properties and dislocation evolution of copper single crystals were studied using the discrete dislocation dynamics (DDD) method coupled with dynamical finite element method. The infuence of strain rate, dislocation density and crystalline orientation were investigated. Strong strain rate effect was observed in DDD simulations, namely, the yield stress increases with the increasing strain rate. In addition, the dislocation density shows an unexpected influence on the yield stress, i.e., the yield stress decreased with dislocation density. The crystalline orientation was also studied and discussed.
Study on in-situ modification of poly-dopamine on glass fibers and its effect on shrinkage performance of cement materials
Authors: Zhong W G , Xin M L , Wang D , Jiang C C , Zhang L N , Cheng X 
Published: March 2020

Abstract
Cement-based materials are one of the essential construction materials that had been widely used in infrastructure and facilities. However, it experienced shrinkage problems, which led to the cracking of concrete buildings and deterioration of the durability. The incorporation of glass fibers can improve the shrinkage resistance of cement materials by enhancing the interface between cement and fiber. Aiming at improving the shrinkage resistance of cement, in this study, glass fibers were in-situ modified with poly-dopamine in aqueous solution. The effect of dopamine hydrochloride concentration and the pH of the solution were investigated with the optimal condition attained to be 2×10−3 g/ml and 8.5, respectively. Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy analysis (XPS) were utilized for the characterization of as-prepared poly-dopamine modified glass fibers. Subsequently, as-prepared and untreated glass fibers were mixed with cement at varied volume fraction and water-cement ratio for the study of shrinkage performance. The glass fiber-reinforced cement had a lower shrinkage than cement without glass fibers. Compared with the cement without glass fibers, when the water-cement ratio was 0.4 and the volume content of in-situ modified glass fibers of poly-dopamine was 7%, the reduction in 28-day shrinkage of poly-dopamine in-situ modified glass fiber-reinforced cement was large extent, reducing by 42%. The shrinkage resistance performance of in-situ modified glass fibers reinforced cement with poly-dopamine was better than that of untreated glass fibers. In short, this work developed novel approach for in-situ modification of glass fibers and found a new path to improve the shrinkage resistance of cement material.
The heat treatment effect on the surface characteristics of 9310 steel gear
Authors: Ren S Y , Wang C Q , Zhang W , Li Y 
Published: March 2020

Abstract
Gear is one of the key parts of aviation industry. With the rapid development of the aviation industry, the design and precision of gears, in particular 9310 steel ones, are permanently improved. This paper focuses on the heat treatment effect on the surface performance of 9310 steel gear. The heat treatment simulation of aviation gear is carried out the DEFORM-3D software. The effects of quenching and tempering temperature on the surface hardness and residual stress of gear are analyzed, which provides a theoretical basis for the heat treatment improvement of 9310 steel gear.
Simulation analysis of gas-solid separation system for hazardous materials’ collection truck
Authors: Zhou S W , Yang S 
Published: March 2020

Abstract
In view of the hazardous materials’ leakage caused by traffic accidents during their transportation, a concept and design of a hazardous materials’ collection truck is proposed for a safe collection and transportation to a professional processing factory. In order to prevent secondary pollution caused by hazardous materials in the vacuum collection process, the gas-solid separation operation must be performed in the hazardous materials collection truck. According to the needs of the gas-solid separation, the structural composition and working principle of the hazardous materials collection truck were analyzed, and the separator was modeled by the finite element analysis method. In the simulation process, the continuous phase flow field simulation of the air is performed first, and on this basis, the discrete phase analysis of the particles is added. The effects of gas flow inlet velocity and particle size on the separation efficiency of the separator were analyzed. Based on the response surface method, the structure of cyclone separator was improved to find the optimal solution and enhance the separation efficiency.
Experimental study on rotary draw bending of magnesium alloy extruded tubes
Authors: Zhao P J , Bai S W , Fang G 
Published: March 2020

Abstract
In this research, the rotary draw bending of magnesium alloy extruded tubes was experimentally investigated. At room temperature, circular magnesium alloy tubes were bent without cracking and wrinkling, but with defective shape. The mandrel effect on the cross-sectional distortion, wall-thickness variation, and spring-back of the bent tube were analyzed and discussed. Results indicated that the rotary draw bending with the mandrel decreased the cross-sectional distortion and spring-back angle of the bent tube, slightly exacerbating the thinning rate of the tube wall thickness. The largest distortion of the cross-section of circular bent tubes with a 90° bending angle occurred in the position about 30° from the clamp die.
Growth, physical and electrical characterization of nickel oxide thin films prepared by plasma-enhanced atomic layer deposition using nickelocene and oxygen precursors
Authors: Xie Lin-Yan , Xiao Dong-Qi , Pei Jun-Xiang , Huo Jingyong , Wu Xiaohan , Liu Wen-Jun , Ding Shi-Jin 
Published: March 2020

Abstract
Nickel oxide (NiO) thin films are prepared by plasma-enhanced atomic layer deposition using nickelocene (NiCp2) and oxygen (O2) precursors. The effects of process parameters on the growth rate of NiO film are investigated, including deposition temperature, NiCp2 pulse time, and O2 plasma pulse time. In terms of deposition temperatures between 225 and 275 °C, a stable growth rate of ∼0.17 Å/cycle is obtained, meanwhile, the deposited films contain Ni(II)−O, Ni(III)−O, Ni(II)−OH, C−C bonds and metallic Ni atoms, and exhibit a smooth surface with root-mean-square roughness of ≤0.37 nm. As the deposition temperature increases from 150 to 350 °C, the deposited NiO film changes from an amorphous state to a NiO (200) orientation-dominated texture and further to NiO (111) and (200) orientations concomitant polycrystalline one; at the same time, the transmittance of the film shows a decline tendency, and the optical band gap decreases from 3.69 to 3.48 eV. Furthermore, it is found that the deposited NiO film behaves like a dielectric rather than a semiconductor, and for the NiO film deposited at 250 °C, a dielectric constant of 16.7 is demonstrated together with a film composition of 51.6% Ni, 40% O and 8.4% C.
Is Merkel Cell Carcinoma of Lymph Node Actually Metastatic Cutaneous Merkel Cell Carcinoma?
Authors: Lawrence Lauren E B , Saleem Atif , Sahoo Malaya K , Tan Susanna K , Pinsky Benjamin A , Natkunam Yasodha , Kunder Christian A , Stehr Henning , Zehnder James L 
Published: March 2020

Abstract

Objectives
The possibility of a so-called primary lymph node neuroendocrine carcinoma has been described in the literature. Here we evaluate cases fitting such a diagnosis and find that the cases demonstrate a convincing and pervasive pattern consistent with metastatic Merkel cell carcinoma.

Methods
Six cases of primary lymph node Merkel cell carcinoma and one case of metastatic neuroendocrine carcinoma at a bony site, all with unknown primary, were sequenced using a combination of whole-exome and targeted panel methods. Sequencing results were analyzed for the presence of an ultraviolet (UV) mutational signature or off-target detection of Merkel cell polyomavirus (MCPyV).

Results
Four of six primary lymph node cases were positive for a UV mutational signature, with the remaining two cases positive for off-target alignment of MCPyV. One case of neuroendocrine carcinoma occurring at a bony site was also positive for a UV mutational signature.

Conclusions
We find no evidence to corroborate the existence of so-called primary Merkel cell carcinoma of lymph node.
iPiDi-PUL: identifying Piwi-interacting RNA-disease associations based on positive unlabeled learning
Authors: Wei Hang , Xu Yong , Liu Bin 
Published: March 2020

AbstractAccumulated researches have revealed that Piwi-interacting RNAs (piRNAs) are regulating the development of germ and stem cells, and they are closely associated with the progression of many diseases. As the number of the detected piRNAs is increasing rapidly, it is important to computationally identify new piRNA-disease associations with low cost and provide candidate piRNA targets for disease treatment. However, it is a challenging problem to learn effective association patterns from the positive piRNA-disease associations and the large amount of unknown piRNA-disease pairs. In this study, we proposed a computational predictor called iPiDi-PUL to identify the piRNA-disease associations. iPiDi-PUL extracted the features of piRNA-disease associations from three biological data sources, including piRNA sequence information, disease semantic terms and the available piRNA-disease association network. Principal component analysis (PCA) was then performed on these features to extract the key features. The training datasets were constructed based on known positive associations and the negative associations selected from the unknown pairs. Various random forest classifiers trained with these different training sets were merged to give the predictive results via an ensemble learning approach. Finally, the web server of iPiDi-PUL was established at http://bliulab.net/iPiDi-PUL to help the researchers to explore the associated diseases for newly discovered piRNAs.
Archaeology in the home: neoclassical ceramics for new audiences in mid-nineteenth-century Britain
Authors: Lewis Paul 
Published: March 2020

AbstractFor audiences not familiar with antiquity, the shattering of the Portland Vase at the British Museum in 1845 raised awareness of a classical past which was claimed by many European nations as their cultural heritage. This article explores how the British ceramics industry quickly exploited a ready market, prompted by such interest. A new genre of wares was produced industrially, mainly in Stoke-on-Trent until the 1870s, although manufacture continued sporadically until 1900. Modern techniques, including moulding and transfer-printing, allowed the creation of versions of black- and red-figure ancient Greek ceramics, sometimes in vivid polychrome. Hitherto largely overlooked by museums and standard histories of ceramics, the material evidence of this fashion endures. Although the resulting artefacts were often marketed without reference to their origins in antiquity, an argument is presented here for their having more than merely decorative significance.
annonex2embl: automatic preparation of annotated DNA sequences for bulk submissions to ENA
Authors: Gruenstaeudl Michael 
Published: March 2020

AbstractMotivationThe submission of annotated sequence data to public sequence databases constitutes a central pillar in biological research. The surge of novel DNA sequences awaiting database submission due to the application of next-generation sequencing has increased the need for software tools that facilitate bulk submissions. This need has yet to be met with the concurrent development of tools to automate the preparatory work preceding such submissions.ResultsThe author introduce annonex2embl, a Python package that automates the preparation of complete sequence flatfiles for large-scale sequence submissions to the European Nucleotide Archive. The tool enables the conversion of DNA sequence alignments that are co-supplied with sequence annotations and metadata to submission-ready flatfiles. Among other features, the software automatically accounts for length differences among the input sequences while maintaining correct annotations, automatically interlaces metadata to each record and displays a design suitable for easy integration into bioinformatic workflows. As proof of its utility, annonex2embl is employed in preparing a dataset of more than 1500 fungal DNA sequences for database submission.Availability and implementationannonex2embl is freely available via the Python package index at http://pypi.python.org/pypi/annonex2embl.Supplementary informationSupplementary data are available at Bioinformatics online.
Genetic variants in epithelial–mesenchymal transition genes as predictors of clinical outcomes in localized prostate cancer
Authors: Deng Yang , Xie Kunlin , Logothetis Christopher J , Thompson Timothy C , Kim Jeri , Huang Maosheng , Chang David W , Gu Jian , Wu Xifeng , Ye Yuanqing 
Published: March 2020

Abstract

Background
Epithelial–mesenchymal transition (EMT) plays a pivotal role in the progression of prostate cancer (PCa). However, little is known about genetic variants in the EMT pathway as predictors of aggressiveness, biochemical recurrence (BCR) and disease reclassification in localized PCa.

Patients and methods
In this multistage study, we evaluated 5186 single nucleotide polymorphisms (SNPs) from 264 genes related to EMT pathway to identify SNPs associated with PCa aggressiveness and BCR in the MD Anderson PCa (MDA-PCa) patient cohort (N = 1762), followed by assessment of the identified SNPs with disease reclassification in the active surveillance (AS) cohort (N = 392).

Results
In the MDA-PCa cohort, 312 SNPs were associated with high D’Amico risk (P &lt; 0.05), among which, 14 SNPs in 10 genes were linked to BCR risk. In the AS cohort, 2 of 14 identified SNPs (rs76779889 and rs7083961) in C-terminal Binding Proteins 2 gene were associated with reclassification risk. The associations of rs76779889 with different endpoints were: D’Amico high versus low, odds ratio [95% confidence interval (CI)] = 2.89 (1.32–6.34), P = 0.008; BCR, hazard ratio (HR) (95% CI) = 2.88 (1.42–5.85), P = 0.003; and reclassification, HR (95% CI) = 2.83 (1.40–5.74), P = 0.004. For rs7083961, the corresponding risk estimates were: D’Amico high versus low, odds ratio (95% CI) = 1.69 (1.12–2.57), P = 0.013; BCR, HR (95% CI) = 1.87 (1.15–3.02), P = 0.011 and reclassification, HR (95% CI) = 1.72 (1.09–2.72), P = 0.020. There were cumulative effects of these two SNPs on modulating these endpoints.

Conclusion
Genetic variants in EMT pathway may influence the risks of localized PCa’s aggressiveness, BCR and disease reclassification, suggesting their potential role in the assessment and management of localized PCa.
Imperial Play
Authors: van der Merwe Rachel Lara 
Published: March 2020

Abstract
In this article, I propose the theory of imperial play as a tool with which scholars can expose ideologies embedded into video games and video game culture and industry. While representation-oriented theories and methodologies help scholars think about the visual and narrative components of a game, analysis of representation fails scholars when we examine video games as simulations. With imperial play, I reimagine Laura Mulvey's male gaze through the lens of post-colonial theory and through Ian Bogost's concept of procedural rhetoric. While I acknowledge two key participants in the practice of imperial play, the game developer and game player, within this article, I demonstrate the framework by focusing on the experience of the player. Using examples from popular console and PC video games, I analyze embedded colonial attitudes within game missions, within the nature of the avatar, within the construction of the gamescape, and in regard to non-playable characters (NPCs).
Observations and dynamical implications of active normal faulting in South Peru
Authors: Wimpenny Sam , Benavente Carlos , Copley Alex , Garcia Briant , Rosell Lorena , O’Kane Aisling , Aguirre Enoch 
Published: March 2020

SUMMARYOrogenic plateaus can exist in a delicate balance in which the buoyancy forces due to gravity acting on the high topography and thick crust of the plateau interior are balanced by the compressional forces acting across their forelands. Any shortening or extension within a plateau can indicate a perturbation to this force balance. In this study, we present new observations of the kinematics, morphology and slip rates of active normal faults in the South Peruvian Altiplano obtained from field studies, high-resolution DEMs, Quaternary dating and remote sensing. We then investigate the implications of this faulting for the forces acting on the Andes. We find that the mountains are extending ∼NNE–SSW to ∼NE–SW along a normal fault system that cuts obliquely across the Altiplano plateau, which in many places reactivates Miocene-age reverse faults. Radiocarbon dating of offset late Quaternary moraines and alluvial fan surfaces indicates horizontal extension rates across the fault system of between 1 and 4 mm yr–1—equivalent to an extensional strain rate in the range of 0.5–2 × 10−8 1 yr–1 averaged across the plateau. We suggest the rate and pattern of extension implies there has been a change in the forces exerted between the foreland and the Andes mountains. A reduction in the average shear stresses on the sub-Andean foreland detachment of ≲4 MPa (20–25 per cent of the total force) can account for the rate of extension. These results show that, within a mountain belt, the pattern of faulting is sensitive to small spatial and temporal variations in the strength of faults along their margins.
Bayesian inversion of surface heat flow in subduction zones: a framework to refine geodynamic models based on observational constraints
Authors: Morishige M , Kuwatani T 
Published: March 2020

SUMMARY
Surface heat flow has been widely used to constrain the thermal structure of subduction zones. However, the forward modelling approaches in previous geodynamic studies have only provided limited information on the model parameters controlling the thermal structure, which makes model validation difficult. Here we apply a probabilistic inversion technique based on Bayes’ theorem to surface heat flow data from Tohoku in Japan and Cascadia to simultaneously infer five model parameters that appear to have the greatest influence on the thermal structure of subduction zones. The surface heat flow is predicted via 2-D steady-state thermomechanical modelling. The Metropolis algorithm is used to obtain the posterior probability distributions. A comparison of our results with previous estimates indicates that our activation energy for the shear viscosity of dislocation creep is lower in both regions, and our radiogenic heat production rate in the upper continental crust is lower in Cascadia. These findings suggest that our geodynamic models cannot explain the surface heat flow observations with the acceptable ranges of model parameter values. We therefore need to refine the models by including, for example, the effects of recent backarc extension, vigorous thermal convection beneath the overriding plate and fluid circulation in the uppermost part of the oceanic crust. The approach presented here also allows us to determine trade-offs between the parameters. This study provides a framework to validate and refine geodynamic models based on various types of observations.