bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measuring user experience on personalized online training system to support online learning
Authors: Elmunsyah H , Hidayat W N , Ulfa S , Surakhman E , Wakhidah R 
Published: January 2020

Abstract
There is a paradigm shift in curriculum development and learning in 21-st century universities. The curriculum is no longer organized in a separate but in integrated manner or commonly referred to as transdisciplinary approach. Several transdisciplinary learning strategies need to be considered, to be studied and developed as learning innovations. One strategy initiated through this paper is the Personalized Online Training System (POTS). POTS provided opportunities for students to search, process, analyze, interpret, and communicate data and information obtained on POTS media. POTS developed based on Generation Z characteristics that are very familiar with technology, have a good self-confidence, high initiative, creative and innovative. The research instrument used questionnaire with a Likert scale using the UEQ framework to 118 students. The result showed that user experience score, usability score, learning design validation score, and students’ response from the interview session indicate that the system is good; yet an improvement is needed.
Transport in two-dimensional topological materials: recent developments in experiment and theory
Authors: Culcer Dimitrie , Cem Keser Aydın , Li Yongqing , Tkachov Grigory 
Published: January 2020

Abstract
We review theoretical and experimental highlights in transport in two-dimensional topological materials over the last five years. Topological materials comprise topological insulators, Weyl semimetals and topological superconductors. This review focuses on key developments in the understanding of transport phenomena involving surfaces and interfaces of two-dimensional topological materials that have not been covered elsewhere. The review is structured around the following general topics: (i) topological insulators are finding applications in magnetic devices, while controversy continues to surround Hall transport in doped samples and the general issue of topological protection; (ii) state-of-the-art experiments on transition metal dichalcogenides have revealed new valley-dependent electrical and optical phenomena which have spin-dependent counterparts in topological insulators; (iii) in Weyl semimetals the manifestations of Fermi arcs in transport are actively investigated as well as controversial; (iv) a new and growing field centres on the non-linear electrical and optical responses of topological materials, where fundamental questions emerge about the interplay of the Berry curvature and disorder scattering; and (v) topological superconductor research is dominated by the quest for chiral superconductivity, Majorana fermions and topological quantum computing. Prospects for future research in this vast field are outlined in the closing section.
Investigation of Cu particles size and bonding time on the microstructure and shear property of Cu/In-45Cu/Cu solder joints
Authors: Yang Li , Wang Gangang , Xiong Yifeng , Shen Sai , Zhang Yaocheng 
Published: January 2020

Abstract
The effect of Cu particles size and bonding time on the microstructure and shear property of Cu/In-45Cu/Cu solder joint was studied, and the shedding mechanism of intermetallic compounds (IMCs) in the solder joint during transient liquid phase (TLP) bonding process was investigated. The results showed that the microstructure of Cu/In-45Cu/Cu solder joint was composed of Cu11In9 phase, residual In phase and Cu particles, and the microstructure of solder joints prepared by small Cu particles was dense. The content of IMCs was increased with increasing bonding time, and the Cu/In-45Cu/Cu solder joint was composed of Cu11In9 phase and Cu particles under bonding time 30 min. The Cu2In phase was formed in the solder joint at 60 min, and many cracks appeared at the interface of Cu11In9 and Cu2In phases. The shear strength of Cu/In-45/Cu solder joints with brittle fracture was increased firstly and then decreased with increasing bonding time, and the maximum shear strength of the solder joint was 16.35 MPa at 30 min.
Characterization of PbS films deposited by successive ionic layer adsorption and reaction (SILAR) for CdS/PbS solar cells application
Authors: Pérez-García C E , Meraz-Dávila S , Arreola-Jardón G , de Moure-Flores F , Ramírez-Bon R , Vorobiev Y V 
Published: January 2020

Abstract
The properties of PbS thin films deposited by Successive Ionic Layer Adsorption and Reaction (SILAR) method were analyzed and applied in PbS/CdS heterojuction solar cells. In this study for n-type layer, cadmium sulfide thin films were deposited on transparent conductive oxide (ITO) substrates by Chemical Bath Deposition (CBD) technique followed by deposition of PbS film using different deposition cycles, 15, 20, 30, 40 and 60 to obtain different thicknesses from 90 nm to 658 nm. Morphological, structural and optical properties were investigated. The roughness of the PbS films were found to be in the range of 10–162 nm, depending on the number of cycles. The films of PbS present a band gap value of 0.6 eV. PbS/CdS heterojunctions were studied as solar cells, it was observed that 40 cycles PbS film has a greater photovoltaic conversion efficiency.
Antibacterial activity, morphology, and physicochemical stability of biosynthesized silver nanoparticles using thyme (Thymus vulgaris) essential oil
Authors: de Melo Ana Paula Zapelini , de Oliveira Brisola Maciel Matheus Vinicius , Sganzerla William Gustavo , da Rosa Almeida Aline , de Armas Rafael Dutra , Machado Michelle Heck , da Rosa Cleonice Gonçalves , Nunes Michael Ramos , Bertoldi Fabiano Cleber , Barreto Pedro Luiz Manique 
Published: January 2020

Abstract
Considering the importance of biosynthesized silver nanoparticles (AgNPs) using plant phytochemicals, the aim of this work was to evaluate the effect of pH in the formulation of AgNPs, bioreduced with thyme essential oil. Biosynthesized AgNPs were prepared under different pH (7, 8, 9 and 10), and the physicochemical stability was evaluated during 90 days at 6 °C and 25 °C. Using GC/MS technique, 17 different compounds were observed in the thyme essential oil; however, borneol and α-terpineol were the majoritarian compounds, probably responsible to the formation of AgNPs. UV–vis spectroscopy with absorbance between 415 and 440 nm and Transmission Electron Microscopy (TEM) confirmed the synthesis of nanoparticles, with diameters of 40 nm and spherical shapes to pH 7, 8 and 9. Through DLS approach, was observed that the average particle diameter was around 90 nm for all pH tested. AgNPs presented homogeneous size distribution, and zeta potential values very close to the theoretical stability range. Moreover, biosynthesized AgNPs presented high antibacterial activity against Escherichia coli and Staphylococcus aureus. Through x-ray Photoelectron Spectroscopic (XPS) analysis was possible confirm the presence of crystalline silver nanoparticles. Thus, silver nanoparticles eco-friendly prepared using thyme essential oil can be considered as an alternative way to produce this nanomaterial with great stability and high antibacterial activity.
The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles
Authors: Badreddine K , Srour A , Awad R , Abou-Aly A I 
Published: January 2020

Abstract
Zn1−xSmxO nanoparticles, with 0.00 ≤ x ≤ 0.10, were prepared using chemical co-precipitation method. The structure and morphology of the obtained samples were characterized using x-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. However, the mechanical properties were investigated via digital Vickers microhardness tester. Vickers microhardness measurements were carried out at different applied loads, varying between 0.5 and 10 N at dwell time 60 s on pressed discs of average thickness 3 mm. Hv decreased as the Sm-content increased up to 0.02 and then it increased for higher concentrations. Whereas, it increased as the applied load increased, revealing that the samples exhibited a reverse indentation size effect (ISE). The microhardness measurements were interpreted using various models such as Meyer’s law, Hays and Kendall (HK) approach, elastic/plastic deformation (EPD), proportional specimen resistance (PSR) and the indentation-induced cracking (IIC). Mechanical parameters such as Young’s modulus (E), yield strength (Y), fracture toughness (K) and brittleness index (B) were calculated as a function of x. The most adequate model for the true microhardness of these samples is IIC. It was found that the addition of Sm content enhanced the mechanical properties of the prepared samples after x = 0.02. Dielectric measurements were used to compute different parameters such as real and imaginary parts of the complex permittivity, dielectric loss (tan δ) and ac conductivity (σ
ac).
Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method
Authors: Deng Leixiong , Zhao Jianping , Wang Zhanyu 
Published: January 2020

Abstract
In this paper, a novel method was proposed to measure the residual stress and plasticity parameters of metal materials with yield plateau through continuous spherical indentation test. The indentation energy was selected as the indentation parameter to establish a dimensionless equation between the residual stress and material parameters through dimensional analysis method. The effects of residual stress and plastic parameters on the indentation response tests are studied, and the dimensionless function expressions are determined respectively when the specimen with or without residual stress based on the finite element analysis data of different residual stress levels. Based on the self-established inverse analysis, the yield strength (

σ

y

), strain hardening exponent (n), ratio coefficient (a) and residual stress (

σ

r

) can be obtained through indentation test. At last, the validation of the method presented in this paper was verified by simulating the material (SS400 and SM490) with the known material parameters.
Study on stress corrosion behavior of C110 steel by electrochemical hydrogenation
Authors: Wang Xia , Zhou Wen-jie , Xu Ling-long , Li Xiong , Gu Yue , Zhang Qiao 
Published: January 2020

Abstract
In this study, the effects of hydrogen on the electrochemical behavior and stress corrosion behavior of C110 steel in CO2 environment was explored by electrochemical hydrogen charging, four-point bending stress loading and electrochemical test. The results show that with the raise of applied stress, the film resistance, transfer resistance of corrosion products decrease, and I

corr
increases. After hydrogen charging, C110 steel has greater activity, and the combined action of external stress further promotes the corrosion reaction. The application of stress will destroy the formation of corrosion product film and reduce its protection. However, when the stress is further increased to 102%σ
s, the larger grains will be broken into smaller grains, so that the surface area of the film will be increased again and the protection of the substrate will be enhanced. The main corrosion products analyzed by XRD are α-Fe, Fe2O3 and MgFe2O4. The applied stress will not change the phase composition of the corrosion products.
New colorimetric method to determine catalase mimic activity
Authors: Rasheed Rashed T , Mansoor Hadeel S , Mansoor Aseel S 
Published: January 2020

Abstract
A new colorimetric method was used to determine catalase mimic activities of manganese dioxide (MnO2), iron oxide (Fe2O3) nanoparticles were prepared by a hydrothermal method (autoclave), and its composite. The MnO2 nanoparticles were annealed at different temperatures (250–700 °C), while MnO2: Fe2O3 composite in the mole ratio of 3:1 annealed at 400 °C. The structures and surface morphology were characterized by FT-IR measurements, x-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Atomic Force Microscope (AFM). This new method succeeds to determine catalase mimic activity, and found the activity of the composite was lower than its activity of MnO2 alone, in the same annealing temperature.
Corrosion behavior of 3A21 aluminum alloy in ethylene glycol solution under different atmospheres
Authors: Hanyang Zuo , Min Gong , Xingwen Zheng , Long Wang , Emori Wilfred 
Published: January 2020

Abstract
The corrosion behavior of 3A21 aluminum alloy in different concentrations of ethylene glycol solution under different simulated atmospheres was studied by electrochemical methods (potentiodynamic polarization and electrochemical impedance spectroscopy) and surface analytical techniques (metalloscopy and the scanning electron microscope equipped with energy-dispersive x-ray spectrometer). The electrochemical results showed that the corrosion of 3A21 aluminum alloy was affected by the concentration of ethylene glycol solution and atmosphere conditions, and the influence of atmosphere was different in different concentrations of ethylene glycol solution. The results were further confirmed by morphology analysis, and the formation of Al-alcoholized film on the surface of aluminum alloy was proved by element energy spectrum analysis, then the corrosion mechanism of 3A21 aluminum alloy was discussed.
Establishment of a two-stage constitutive model based on dislocation density theory for as-forged SA508 Gr.3Cl.1
Authors: Ma Jing , Liu Jiansheng , Guo Zhen 
Published: January 2020

Abstract
The high-temperature deformation behavior of the SA508 Gr.3Cl.1 steel was investigated by the uniaxial isothermal compression tests at the deformation temperature from 1223 K to 1473 K and strain rate from 0.001s−1 to 1 s−1, which were carried out using Gleeble-1500 thermo-mechanical simulator. Based on the experimental data, the material parameters and active energy of hot deformation were determined according to the regression analysis method. The critical strain of dynamic recrystallization (DRX) was confirmed by simplified P-J method. Furthermore, the constitutive model for work hardening-dynamic recovery (WH-DRV) stage and DRX stage was established based on dislocation density theory and the kinetics of DRX. Finally, the flow stress calculated using the established model and experiment data was compared and the results showed that it is enough accurate to predict the flow stress during hot deformation for SA508 Gr.3Cl.1. Thus, the model will be beneficial for the accuracy of simulation by Finite Element Method (FEM) method.
Erosion studies of plasma sprayed WC-12%Co, Cr3C2-25%NiCr, 80%Ni-20%Cr, 87%Al2O3-13%TiO2 coatings on ASTM A36 steel
Authors: Panwar Varun , Grover Neel Kanth , Chawla Vikas 
Published: January 2020

Abstract
WC-12%Co, Cr3C2-25%NiCr, 80%Ni-20%Cr, 87%Al2O3-13%TiO2 coatings were deposited by Air Plasma Spray (APS) technique on ASTM A36 steel. Erosion behaviour of sprayed coated samples were investigated at three different impact angles (45°, 60° and 90°). The mechanism of erosion was investigated on uncoated and coated samples. The rate of erosion of the substrate first increased with increasing angle of impact and then gradually decreased. But the erosion rate of the coated samples increased steadily. Substrate shows the higher metal removal whereas coating shows the higher erosion resistance. WC-12%Co coated samples performed well in erosion testing and offered best erosion resistance as compared to the substrate and all other coatings. Ductile fracture takes place on substrate material at higher impact angle. Overall, all the coated samples have shown less erosion propensity when compare to the bare one.
Association of State Minimum Wage Rates and Health in Working-Age Adults Using the National Health Interview Survey
Authors: Buszkiewicz James H , Hill Heather D , Otten Jennifer J 
Published: January 2020

AbstractStates adopt minimum wages to improve workers’ economic circumstances and well-being. Many studies, but not all, find evidence of health benefits from higher minimum wages. This study used a rigorous “triple difference” strategy to identify the associations between state minimum wages and adult obesity, body mass index (weight (kg)/height (m)2), hypertension, diabetes, fair or poor health, and serious psychological distress. National Health Interview Survey data (United States, 2008–2015) on adults aged 25–64 years (n = 131,430) were linked to state policies to estimate the prevalence odds ratio or mean difference in these outcomes associated with a $1 increase in current and 2-year lagged minimum wage among less-educated adults overall and by sex, race/ethnicity, and age. In contrast to prior studies, there was no association between current minimum wage and health; however, 2-year lagged minimum wage was positively associated with the likelihood of obesity (prevalence odds ratio = 1.08, 95% confidence interval: 1.00, 1.16) and with elevated body mass index (mean difference = 0.27, 95% confidence interval: 0.04, 0.49). In subgroup models, current and 2-year lagged minimum wage were associated with a higher likelihood of obesity among male and non-White or Hispanic adults. The associations with hypertension also varied by sex and the timing of the exposure.
The intuitive invalidity of the pain-in-mouth argument
Authors: Liu Michelle 
Published: January 2020

AbstractIn a recent paper, Reuter, Seinhold and Sytsma (Analysis, 2019) put forward an implicature account to explain the intuitive failure of the pain-in-mouth argument. They argue that utterances such as ‘There is tissue damage / a pain / an inflammation in my mouth’ carry the conversational implicature that there is something wrong with the speaker’s mouth. Appealing to new empirical data, this paper argues against the implicature account and for the entailment account, according to which pain reports using locative locutions, such as ‘There is a pain in my mouth’, are intuitively understood as entailing corresponding predicative locutions, such as ‘My mouth hurts.’ On this latter account, the pain-in-mouth argument seems invalid because the conclusion is naturally understood as entailing something which cannot be inferred from the premisses. Implications for the philosophical debate about pain are also drawn.
No carbon limitation after lower crown loss in Pinus radiata
Authors: Gomez-Gallego Mireia , Williams Nari , Leuzinger Sebastian , Scott Peter Matthew , Bader Martin Karl-Friedrich 
Published: January 2020

Abstract

Background and Aims
Biotic and abiotic stressors can cause different defoliation patterns within trees. Foliar pathogens of conifers commonly prefer older needles and infection with defoliation that progresses from the bottom crown to the top. The functional role of the lower crown of trees is a key question to address the impact of defoliation caused by foliar pathogens.

Methods
A 2 year artificial defoliation experiment was performed using two genotypes of grafted Pinus radiata to investigate the effects of lower-crown defoliation on carbon (C) assimilation and allocation. Grafts received one of the following treatments in consecutive years: control–control, control–defoliated, defoliated–control and defoliated–defoliated.

Results
No upregulation of photosynthesis either biochemically or through stomatal control was observed in response to defoliation. The root:shoot ratio and leaf mass were not affected by any treatment, suggesting prioritization of crown regrowth following defoliation. In genotype B, defoliation appeared to impose C shortage and caused reduced above-ground growth and sugar storage in roots, while in genotype A, neither growth nor storage was altered. Root C storage in genotype B decreased only transiently and recovered over the second growing season.

Conclusions
In genotype A, the contribution of the lower crown to the whole-tree C uptake appears to be negligible, presumably conferring resilience to foliar pathogens affecting the lower crown. Our results suggest that there is no C limitation after lower-crown defoliation in P. radiata grafts. Further, our findings imply genotype-specific defoliation tolerance in P. radiata.
Instruments Measuring Prospective Memory: A Systematic and Meta-Analytic Review
Authors: Blondelle Geoffrey , Hainselin Mathieu , Gounden Yannick , Quaglino Véronique 
Published: January 2020

AbstractObjectiveTo identify the available measures to assess prospective memory (PM) abilities, to describe their content, and to quantitatively summarize the effects of various diseases on PM depending on the type of assessmentMethodThree databases (PsycInfo, PsycArticles and PubMed) were searched up to June 2019 to identify the existing PM measures. The identified PM measures were classified according to the type of assessment: test batteries, single-trial procedures, questionnaires, and experimental procedures. The characteristics and psychometric properties were presented. PM performances were compared between patients with various diseases and controls depending on the type of assessment.ResultsMost of the 16 measures identified evaluated both event- and time-based tasks, were linked to functional outcomes, showed empirical evidences regarding validity and reliability, and provided parallel versions. To a slightly lesser extent, few measures provided normative data, translations/adaptation into another language, cutoff scores for diagnostic purposes, qualitative scoring, parallel version, and external aids during the test. Compared to healthy controls, patients had significantly poorer performances when PM was assessed with experimental procedures. Heterogeneous data precluded the interpretation of a summary effect for test batteries, single-trial procedures, and questionnaires. Planned subgroup analyses indicated consistent PM impairment for patients compared to controls for three test batteries. However, PM complaints did not differ between patients and controls.ConclusionsThese results suggest that the use of PM test batteries and experimental procedures are relevant for detecting performance variations in diverse clinical populations. Clinical implications and directions for future research are discussed.
Males evolve to be more harmful under increased sexual conflict intensity in a seed beetle
Authors: McNamara Kathryn B , Sloan Nadia S , Kershaw Sian E , van Lieshout Emile , Simmons Leigh W 
Published: January 2020

Abstract
One conspicuous manifestation of sexual conflict is traumatic mating, in which male genitalia damage the female during copulation. The penis of the seed beetle, Callosobruchus maculatus, is covered in spines that damage the female reproductive tract. Females kick males ostensibly to shorten these harmful copulations. How these iconic conflict behaviors coevolve in response to sexual conflict intensity can provide insight into the economics of these traits. We examined whether male harm and female resistance coevolved in response to elevated sexual conflict. We quantified copulation behavior and female reproductive tract damage of individuals from replicated populations evolving for 32 generations under low or high sexual conflict (female- and male-biased treatments, respectively). First, we permitted females ad libitum matings with males from either sex-ratio treatment, recording her tract damage and longevity. Second, we performed a full-factorial cross of matings by males and females from each of the replicate populations, recording mating and kicking duration and reproductive output. We found manipulation of sexual conflict intensity led to the evolution of male harmfulness, but not female resistance to harm. We also demonstrate that female kicking does not respond to sexual conflict intensity, suggesting it does not function to mitigate male harm in this species. Our findings demonstrate the complexities of behavioral and morphological coevolutionary responses to sexual conflict intensity in an important model species.