bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of annealing time on bimodal microstructures and tensile properties of Mg–6Sn–3Al–1Zn alloy
Authors: Wei Fuan , Wang Jinhui , Shi Bo , Zhang Zhengang 
Published: September 2020

Abstract
Although the Mg–6Sn–3Al–1Zn alloy with bimodal grain size distribution has excellent mechanical properties, its mechanical properties can further be improved by adjusting or controlling its microstructures through annealing. In this study, the effect of annealing time on microstructures and mechanical properties of the Mg–6Sn–3Al–1Zn alloy was systematically studied. The Mg–6Sn–3Al–1Zn alloy with bimodal microstructures was prepared through pack-rolling with two passes at 450 °C (55 % thickness reduction per pass, and the total rolling deformation is 80 %). Then the alloy was annealed for 10 min, 20 min, 30 min and 40 min at 350 °C, respectively. The results showed that volume fractions of Mg2Sn phase and recrystallization grains increased with increasing of the annealing time. The multi-modal microstructures were formed in alloys after annealing. When the annealing time ≤30 min, the average grain size of the alloy increased with increasing of the annealing time, while it decreased after annealed for 40 min. The intensity of {0001} texture decreased with increasing of annealing time (<20 min), which caused by dynamic recovery. When the annealing time reached 30 min, the generation of recrystallization led to the enhancement of {0001} texture. However, the {0001} texture intensity reduced after the alloy was annealed for 40 min, which caused by further dynamic recrystallization. In Mg–6Sn–3Al–1Zn alloy annealed for 30 min, the volume fractions of Mg2Sn phase and recrystallization grains were respectively 1.29 % and 56 %, and the average grain size was 6.28 μm. Moreover, the mechanical properties of the alloy reached optimum, i.e., the tensile strength, yield strength and elongation were 336 MPa, 194 MPa and 26 %, respectively.
Precise dot inkjet printing thought multifactorial statistical optimization of the piezoelectric actuator waveform
Authors: Bucciarelli Alessio , Reddy Chandraiahgari Chandrakanth , Adami Andrea , Mulloni Viviana , Lorenzelli Leandro 
Published: September 2020

Abstract
InkJet printing is a technique that in the last decades has attracted the attention of the scientific community because it allows producing customized patterns with a variety of inks and substrates, making it suitablemethod for the production of flexible circuits. However, the optimization of this technique is still problematic due to a large number of process variables. Among them the modification of the waveform parameters of the piezoelectric actuator that allows the ejections of the ink can be effective in tuning the printing quality. This work reports a study by a statistical method, namely Design of Experiments (DOE), to optimize the inkjet printing parameters for a nanoparticle-based silver (Ag) ink. This method showed the interplay of the waveform parameters into the definition of optimal drop reproducibility and the achievement of the optimal resolution. In particular, it is shown that mixed terms of the model have a statistical significance and therefore the proposed multifactorial approach provides a benefit in the optimization with respect to the more commonly used one-factor-at-a-time models (OFAT). For the first time, empirical equations have been reported within the corresponding 95% confidence intervals. These equations can be used as a tool to directly tune the properties of the printed dot by modifying the waveform parameters. As case study, we proposed the combinations of a commercial Ag nanoparticles ink with Kapton, a commonly used substrate for flexible electronics.
Recession and fossil fuel dependence undermine climate policy commitments
Authors: Ide Tobias 
Published: September 2020

Abstract
Knowledge on the determinants of more or less ambitious climate policies on the country level is still limited, especially with regards to the 2015 Paris Agreement to mitigate global climate change. This is a significant knowledge gap, especially given the review of many contributions to the Paris Agreement due in 2021. I analyse why some countries make insufficient pledges to reduce their greenhouse gas emissions under the Paris Agreement, while other countries pursue more ambitious climate change mitigation goals. Using qualitative comparative analysis (QCA), the study finds that economic recession, dependence on fossil fuels for energy generation, and levels of development are strong predictors of insufficient climate policies. These results are worrisome in the context of the economic recession triggered by the COVID-19 pandemic as well as the continued predominance of fossil fuels in the world’s energy mix.
Effect of rotating unbalance on nonlinear dynamic response of flexible rotors supported on tilting pad journal bearing
Authors: Dixit Harsh Kumar , Singh Ajit , Gupta T C 
Published: September 2020

Abstract
The effect of orientation of rotors and rotating unbalance at disc on the dynamic response of rotor supported by four pad tilting pad journal bearing (TPJB) is studied. The orientation of the rotor taken has a horizontal rotor (HR) and a vertical rotor (VR). The rotor element modeled as the Timoshenko beam element with four degrees of freedom per node. The disc is rigid and it is centrally mounted. The nonlinear forces by the fluid film in tilting pad journal bearing were determined by solving the Reynolds equation along with each pad. The infinite short bearing assumption has taken to find pressure distribution along with pads. Indigenous MATLAB® code has developed to solve the rotor-TPJB equation. The ODE-15s solver is used to find the related response data of journal and disc centers. Orbits, phase plots, and power spectrums used to analyze the behavior of the system. The sub-synchronous vibrations dominate at lower speeds and high rpm unbalance forces become much significant and overcome bearing fluid film forces causing catastrophically change in response of the system.
Improved green body strength using PMMA–Al2O3 composite particles fabricated via electrostatic assembly
Authors: Tan Wai Kian , Matsuzaki Tatsuya , Yokoi Atsushi , Kawamura Go , Matsuda Atsunori , Muto Hiroyuki 
Published: September 2020

Abstract
In additive manufacturing, indirect laser sintering is used to process and fabricate ceramic materials using a polymer–ceramics green body. The mechanical strength of the green body is important to hold the shape and to enable the use of laser with low power density during the laser sintering process. Because the microstructure of the green body will considerably affect the density of the final product, this study demonstrated a feasible controlled formation of Poly (methylmethacrylate) (PMMA)–Al2O3 composite particles by an electrostatic assembly method that was used for the fabrication of the green body with improved mechanical properties, which were determine using an indentation test. The controllable homogeneous decoration of desired submicron-sized PMMA particles on Al2O3 particles allowed an effective use of PMMA additives while exhibiting considerable mechanical property improvement of the green body compared to poly(vinyl alcohol)-bonded Al2O3. The findings of this study show good potential of green body formation with improved strength for ceramics fabrication via indirect laser sintering.
Self-assembly of plasmonic chiral superstructures with intense chiroptical activity
Authors: Chen Zhong , Lu Xingyu 
Published: September 2020

Abstract
Chiral nanostructures are asymmetric nanoarchitectures that cannot be superimposed with their mirrored-symmetric counterparts, which have attracted considerable attention due to their special photophysical properties and potential applications in plasmonics, spectroscopy and nanosensors. In particular, Self-Assembly of chiral nanostructures with symmetric or asymmetric objects might exhibit exceptional optical activity because those chiral superstructures can manipulate chiral states of light that leads to circular dichroism (CD) effect. This review highlights recent advances on the self-assembly of plasmonic chiral superstructures from simpler dimeric, and trimeric chiral nanoassemblies to complicated chiral nanoarchitectures, especially emphasizes the resulted superior optical activity and the corresponding principles.
Synthesis and characterization of barium titanate/polyacrylonitrile nanocomposite for electrochemical sensing of doxorubicin
Authors: Mehtab Sameena , Zaidi M G H , Joshi Pragati , Bawari Deependra 
Published: September 2020

Abstract
A microwave (MW) assisted process was evolved to synthesize a series of polymer nanocomposites (PNCs) through 2,2-azobisisobutyronitrile (AIBN) initiated free radical in situ polymerization of acrylonitrile (AN) in presence of nanobariumtitanate (NBT). The reaction conditions were optimized and microwave power ranging 25 to 100 W over 10 min was found to be most suited for the synthesis of PNCs. Synthesis of PNCs has been ascertained through UV–vis, FTIR spectroscopy and microstructure were investigated through XRD and AFM. TG-DTA-DTG proclaims that PNCs acquire lower moisture content and higher heat resistance as compared to polyacrylonitrile (PAN). The synthesized PNCs have been applied as sensing material to develop electrochemical probe for detection of doxorubicin (DOX). The presence of DOX (0.01%, w/v) in phosphate buffer at pH 7.4 has shown a remarkable increase in the peak current at PNCs modified glassy carbon electrode (GCE). Cyclic voltammetric (CV) studies proof good acceptance of nanocomposites as sensing material for anti cancerous drug DOX.
Brazil hosts the Olympic Games
Authors: Pereira Anthony W. 
Published: September 2020

Abstract
‘Brazil hosts the Olympic Games’ examines the opening ceremony of the 2016 Olympic Games in Rio de Janeiro on 5 August 2016. This was the first time the games took place in South America. Watched live by hundreds of millions of people around the world, the four-hour ceremony reveals something about Brazil and its national experience. It provides insights into what makes Brazilians proud to be Brazilian, as well as anxieties behind those sources of pride. The themes concern the importance of nature and its preservation; the importance of the future in Brazilians’ view of the world; Brazil’s alleged vocation for peaceful inclusion; and the informality of the Brazilian way of getting things done.
Democratic development or decay?
Authors: Pereira Anthony W. 
Published: September 2020

Abstract
‘Democratic development or decay?’ studies Luiz Inácio ‘Lula’ da Silva’s election as Brazil’s president in 2002, which demonstrated the resilience of Brazilian democracy. Lula’s election began a thirteen-and-a-half-year period when politicians from the Workers’ Party controlled the presidency. The contested history of these years explains much of the current polarization in Brazilian politics between a new ideological right and the left. The chapter then describes Brazil’s political system and examines the accomplishments and failures of the Workers’ Party in power. It also considers the political crisis that began in 2013 and contributed to the election of Jair Bolsonaro in 2018.
Exuberance and diversity
Authors: Pereira Anthony W. 
Published: September 2020

Abstract
‘Exuberance and diversity’ describes the Park of the City in Brasília, Brazil’s capital, which reflects the exuberance and diversity of Brazil. In the face of the innumerable challenges of the 21st century, it is useful to remember the obstacles that Brazil successfully overcame in the 20th. Brazil’s faces some interesting new challenges. Ultimately, the problems Brazil faces—inequality, poverty, violence, environmental degradation, political polarization, pandemics, and a gap between the populace and its representatives—are the world’s problems. Because Brazil occupies a pivotal position in the world, everyone should want Brazil to succeed as a nation.
Love poetry
Authors: Morgan Llewelyn 
Published: September 2020

Abstract'Love poetry' examines Ovid’s ventures into the sub-genre of love-elegy and describes the development of this exclusively Roman literary form over the previous two generations, and the conventions that Ovid had inherited. Ovid wrote three books on the subject of love, these are Amores (Loves), Ars Amatoria (Art of Love) and Remedia Amoris (Cures for Love), a meeting of love-elegy and the popular ancient tradition of didactic poetry. The Amores was the collection that launched Ovid’s poetic career, and it set the terms for the rest of it, marking him out as the leading proponent of elegiac verse in Rome. In his approach to love-elegy we also see a style that will characterize much of his later work, playful and intensely self-aware. The Amores is less poetry about love than poetry about love poetry, its primary appeal lying in witty manipulation of poetic convention. Meanwhile, the Ars Amatoria teaches men and women how to find and keep a lover, and then the Remedia Amoris explains how to ‘unlearn’ the lessons of the Ars.
Metamorphoses
Authors: Morgan Llewelyn 
Published: September 2020

Abstract'Metamorphoses; focuses on the Metamorphoses, widely considered Ovid’s masterpiece. The Metamorphoses is a collection of transformation stories, but the principle of change characterizes every layer of the poem. The Metamorphoses is Ovid’s only epic poem, thus in form a departure from the elegiac tradition he otherwise champions. But Ovid’s epic is devoted to destabilizing the order and certainties that conventional epic, such as Virgil’s Aeneid, was designed to uphold, and metamorphosis as a theme is well adapted to advance that end. The metamorphic character of the Metamorphoses is not restricted to explicit descriptions of shape-shifting, but affects its narrative form, even its generation of meaning. The Metamorphoses is thus Ovid’s most ambitious exploration of the nature of poetry, an astonishingly sophisticated performance, but it is better known as a collection of brilliantly memorable tales, Midas’ golden touch, Narcissus, Icarus, Pygmalion, a tour de force in storytelling. The poem has in fact served as the authoritative encyclopaedia of Graeco-Roman folklore. The freshness and vibrancy of Ovid's storytelling has a lot to do with the irreverent and self-conscious approach he adopts to writing an epic poem.
TheFasti
Authors: Morgan Llewelyn 
Published: September 2020

Abstract‘The Fasti’ is a study of the Fasti, Ovid’s poetic version of the Roman calendar. Each book of this poem corresponds to a month of the Roman calendar, and the books, like the Roman calendars they imitate, detail the religious observances associated with individual days. The Fasti is Ovid’s most topical poem, indirectly inspired by the great calendrical reform of Julius Caesar, from which our modern calendar derives. Of all Ovid’s poetry, then, this brings him closest to the concerns of Augustus, heir to Caesar, and his reformist regime. It is the most Roman of his poems, too, directly engaged with the religious, and hence political, culture of the city, and its sacred and secular topography. At the same time, this chapter explains, Ovid reverts to elegiac form from the epic form of the Metamorphoses, and while the poem contains much in the way of celebration of Augustus’ Rome, Ovid’s trademark wit and self-awareness are undiminished, and hints of a more dangerous irreverence are to be found.
Of ‘isms’
Authors: Craig Edward 
Published: September 2020

Abstract
Epistemology is the branch of philosophy concerned with knowledge, belief, and closely related notions like reasons and justification. ‘Of ‘isms’’ explains some philosophical ‘ism’ words, which are broad terms designating a certain general type of doctrine. René Descartes was one of the most famous exponents of dualism, as he worked on proving a doctrine that pre-dated him; materialism and idealism were based on earlier concepts, giving rise later to the dialectical materialism of Karl Marx. Idealism holds that everything has a mental or spiritual basis. Rationalism and empiricism are opposed to each other. Empiricists believe everything is filtered through our perceptions rather than reality having an inherently logical structure.
Role of the Healthcare Surface Environment in Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Transmission and Potential Control Measures
Authors: Kanamori Hajime , Weber David J , Rutala William A 
Published: September 2020

Abstract
The healthcare environment serves as one of the possible routes of transmission of epidemiologically important pathogens, but the role of the contaminated environment on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission remains unclear. We reviewed survival, contamination, and transmission of SARS-CoV-2 via environmental surfaces and shared medical devices as well as environmental disinfection of SARS-CoV-2 in healthcare settings. Coronaviruses, including SARS-CoV-2, have been demonstrated to survive for hours to days on environmental surfaces depending on experimental conditions. The healthcare environment is frequently contaminated with SARS-CoV-2 RNA in most studies but without evidence of viable virus. Although direct exposure to respiratory droplets is the main transmission route of SARS-CoV-2, the contaminated healthcare environment can potentially result in transmission of SARS-CoV-2 as described with other coronaviruses such as SARS and Middle East respiratory syndrome coronaviruses. It is important to improve thoroughness of cleaning/disinfection practices in healthcare facilities and select effective disinfectants to decontaminate inanimate surfaces and shared patient care items.
Epidemiological Correlates of Polymerase Chain Reaction Cycle Threshold Values in the Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)
Authors: Salvatore Phillip P , Dawson Patrick , Wadhwa Ashutosh , Rabold Elizabeth M , Buono Sean , Dietrich Elizabeth A , Reses Hannah E , Vuong Jeni , Pawloski Lucia , Dasu Trivikram , Bhattacharyya Sanjib , Pevzner Eric , Hall Aron J , Tate Jacqueline E , Kirking Hannah L 
Published: September 2020

Abstract

Background
Detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has principally been performed through the use of real-time reverse-transcription polymerase chain reaction testing. Results of such tests can be reported as cycle threshold (Ct) values, which may provide semi-quantitative or indirect measurements of viral load. Previous reports have examined temporal trends in Ct values over the course of a SARS-CoV-2 infection.

Methods
Using testing data collected during a prospective household transmission investigation of outpatient and mild coronavirus disease 2019 cases, we examined the relationships between Ct values of the viral RNA N1 target and demographic, clinical, and epidemiological characteristics collected through participant interviews and daily symptom diaries.

Results
We found that Ct values are lowest (corresponding to a higher viral RNA concentration) soon after symptom onset and are significantly correlated with the time elapsed since onset (P &lt; .001); within 7 days after symptom onset, the median Ct value was 26.5, compared with a median Ct value of 35.0 occurring 21 days after onset. Ct values were significantly lower among participants under 18 years of age (P = .01) and those reporting upper respiratory symptoms at the time of sample collection (P = .001), and were higher among participants reporting no symptoms (P = .05).

Conclusions
These results emphasize the importance of early testing for SARS-CoV-2 among individuals with symptoms of respiratory illness, and allow cases to be identified and isolated when their viral shedding may be highest.
Rotational atherectomy through a coronary artery bypass graft after transcatheter aortic valve implantation: a case report
Authors: Illescas Edgar , Cuisset Thomas , Spychaj Jean-Charles , Deharo Pierre 
Published: September 2020

Abstract

Background
Aortic stenosis (AS) in the elderly is frequently associated with complex coronary artery disease. Rotational atherectomy (RA) in this clinical setting is challenging because coronary slow flow could lead to haemodynamic instability aggravated by the severe AS.

Case summary
We present the case of an 83-year-old woman with symptomatic severe AS, mildly decreased left ventricular ejection fraction and history of coronary artery bypass grafting with right internal mammary artery (RIMA) to the right coronary artery (RCA) and left internal mammary artery to the left anterior descending artery and further percutaneous coronary intervention (PCI) to the circumflex. First, we performed a transcatheter aortic valve implantation (TAVI) to treat the severe AS. Because of persistent symptoms despite good result, we then performed RA of the native RCA through the RIMA with a Guidezilla® guide extension catheter.

Discussion
A two-staged procedure of TAVI and PCI with RA of the RCA via RIMA was successfully performed. We decided to perform the PCI after the TAVI to allow a better haemodynamic tolerance of the complex coronary intervention. This procedure needs caution as the conduit is fragile and could be easily damaged during the RA. No data are available about feasibility and safety of RA through a native graft, but this could be a first step to consider it.
Safety and efficacy of double vs. triple antithrombotic therapy in patients with atrial fibrillation with or without acute coronary syndrome undergoing percutaneous coronary intervention: a collaborative meta-analysis of non-vitamin K antagonist oral anticoagulant-based randomized clinical trials
Authors: Gargiulo Giuseppe , Cannon Christopher P , Gibson Charles Michael , Goette Andreas , Lopes Renato D , Oldgren Jonas , Korjian Serge , Windecker Stephan , Esposito Giovanni , Vranckx Pascal , Valgimigli Marco 
Published: September 2020

AbstractAimsSafety and efficacy of antithrombotic regimens in patients with atrial fibrillation (AF) undergoing percutaneous coronary intervention (PCI) may differ based on clinical presentation. We sought to compare double vs. triple antithrombotic therapy (DAT vs. TAT) in AF patients with or without acute coronary syndrome (ACS) undergoing PCI.Methods and resultsA systematic review and meta-analysis was performed using PubMed to search for non-vitamin K antagonist oral anticoagulant (NOAC)-based randomized clinical trials. Data on subgroups of ACS or elective PCI were obtained by published reports or trial investigators. A total of 10 193 patients from four NOAC trials were analysed, of whom 5675 presenting with ACS (DAT = 3063 vs. TAT = 2612) and 4518 with stable coronary artery disease (SCAD; DAT = 2421 vs. TAT = 2097). The primary safety endpoint of ISTH major bleeding or clinically relevant non-major bleeding was reduced with DAT compared with TAT in both ACS (12.2% vs. 19.4%; RR 0.63, 95% CI 0.56–0.71; P &lt; 0.0001; I2 = 0%) and SCAD (14.6% vs. 22.0%; RR 0.68, 95% CI 0.55–0.85; P = 0.0008; I2 = 66%), without interaction (P-int = 0.54). Findings were consistent for secondary bleeding endpoints, including intra-cranial haemorrhage. In both subgroups, there was no difference between DAT and TAT for all-cause death, major adverse cardiovascular events, or stroke. Myocardial infarction and stent thrombosis were numerically higher with DAT vs. TAT consistently in ACS and SCAD (P-int = 0.60 and 0.86, respectively). Findings were confirmed by multiple sensitivity analyses, including a separate analysis on dabigatran regimens and a restriction to PCI population.ConclusionsDAT, compared with TAT, is associated with lower bleeding risks, including intra-cranial haemorrhage, and a small non-significant excess of cardiac ischaemic events in both patients with or without ACS.