bluuebunny/crossref_metadata_2025_split huggingface dataset:
Conditions for Wall Thickness Reduction in Hollow Sinking of SUS304 Tubes With Drawing Speed Control in Entrance and Exit Sides of Die
Authors: Kishimoto Takuma , Gondo Shiori , Takemoto Kosuke , Tashima Kenichi , Suzuki Shinsuke 
Published: September 2019

Abstract
In this study, the conditions for wall thickness reduction in hollow sinking were obtained by tube drawing experiments in which the drawing speed ratio was controlled under three conditions (1.09, 1.11, and 1.14). These conditions have not been found in the history of hollow sinking. The results of the experiment and the theoretical formulas indicate that the geometric condition is obtained from the figure of the ratio of inner diameter to outer diameter after drawing against that ratio before drawing. Furthermore, the ratio of the inner diameter to the outer diameter after drawing must be above the constant wall thickness line derived from the cross-sectional change. To satisfy this geometric condition, the drawing speed ratio must be larger than the threshold value, which is obtained from the ratio of the inner diameter to the outer diameter before drawing, and the reduction of the die. However, the value of the back stress approaches that of the strength of the tube when the drawing speed ratio increases. A simple dynamical model shows that parameters other than the drawing speed ratio do not significantly decrease the back stress during drawing. Therefore, the drawing speed ratio should be set such that the tube does not break.
An Autonomous Docking Mechanism for Vertical Lift Unmanned Aircraft
Authors: Papayanopoulos John , Webb Kevin , Rogers Jonathan 
Published: September 2019

Abstract
Unmanned aerial vehicles are increasingly being tasked to connect to payload objects or docking stations for the purposes of package transport or recharging. However, autonomous docking creates challenges in that the air vehicle must precisely position itself with respect to the dock, oftentimes in the presence of uncertain winds and measurement errors. This paper describes an autonomous docking mechanism comprising a static ring and actuated legs, coupled with an infrared tracking device for closed-loop docking maneuvers. The dock’s unique mechanical design enables precise passive positioning such that the air vehicle slides into a precise location and orientation in the dock from a wide range of entry conditions. This leads to successful docking in the presence of winds and sensor measurement errors. A closed-loop infrared tracking system is also described in which the vehicle tracks an infrared beacon located on the dock during the descent to landing. A detailed analysis is presented describing the interaction dynamics between the aircraft and the dock, and system parameters are optimized through the use of trade studies and Monte Carlo analysis with a three degree-of-freedom simulation model. Experimental results are presented demonstrating successful docking maneuvers of an autonomous air vehicle in both indoor and outdoor environments. These repeatable docking experiments verify the robustness and practical utility of the dock design for a variety of emerging applications.
Modeling and Simulation of Robotic Finger Powered by Nylon Artificial Muscles
Authors: Saharan Lokesh , Wu Lianjun , Tadesse Yonas 
Published: September 2019

Abstract
A robotic finger actuated by novel artificial muscles known as twisted and coiled polymer (TCP) muscles has been proposed as an inexpensive, yet high-performance component of a robotic hand in recent years. In this paper, the Euler–Lagrangian method coupled with an electro-thermo-mechanical model-based transfer function was used for the analysis of finger joints in the hand. Experiments were performed at three power magnitudes provided to the TCP muscles, and the output angular displacements of the index finger subtended corresponding to the power levels were measured. The measured input and output parameters were used for system identification. To elucidate how the new artificial muscle influences the finger motion, two types of numerical simulations were performed: force input simulation (FIS) using measured force as an input and power input simulation (PIS) using measured electrical power as an input. Results were quantified statistically, and the simulated data were compared with the experimental results. Sensitivity analysis was also presented to understand the effect of the mechanical properties on the system. This model will help in understanding the effect of the TCP muscles and other similar smart actuators on the dynamics of the robotic finger.
The Ancestral Lhasa River: A Late Cretaceous trans-arc river that drained the proto–Tibetan Plateau
Authors: Laskowski Andrew K. , Orme Devon A. , Cai Fulong , Ding Lin 
Published: September 2019

Abstract
Late Cretaceous trench basin strata were deposited in the subduction zone that consumed Neo-Tethyan oceanic lithosphere along the southern margin of the proto–Tibetan Plateau. We conducted detrital zircon (DZ) U-Pb geochronology on six trench basin samples (n = 1716) collected near Dênggar, Tibet (∼500 km west of Lhasa), to assess the provenance of these rocks and reconstruct Late Cretaceous sediment transport pathways. They contained DZ ages that point to a unique source around Lhasa city, north of the Late Cretaceous Gangdese magmatic arc. The modern Lhasa River catchment contains the requisite sources, and its main trunk transects the Gangdese magmatic arc, joining with the Yarlung River at a barbed junction at the India-Asia suture. We infer that the Lhasa River is an ancient feature that transported sediment to the subduction zone in Late Cretaceous time and persisted during India-Asia collision.
Temporal and spatial variations in magmatism and transpression in a Cretaceous arc, Median Batholith, Fiordland, New Zealand
Authors: Buriticá Luisa F. , Schwartz Joshua J. , Klepeis Keith A. , Miranda Elena A. , Tulloch Andy J. , Coble Matthew A. , Kylander-Clark Andrew R.C. 
Published: September 2019

AbstractWe investigated the interplay between deformation and pluton emplacement with the goal of providing insights into the role of transpression and arc magmatism in forming and modifying continental arc crust. We present 39 new laser-ablation–split-stream–inductively coupled plasma–mass spectrometry (LASS-ICP-MS) and secondary ion mass spectrometry (SIMS) 206Pb/238U zircon and titanite dates, together with titanite geochemistry and temperatures from the lower and middle crust of the Mesozoic Median Batholith, New Zealand, to (1) constrain the timing of Cretaceous arc magmatism in the Separation Point Suite, (2) document the timing of titanite growth in low- and high-strain deformational fabrics, and (3) link spatial and temporal patterns of lithospheric-scale transpressional shear zone development to the Cretaceous arc flare-up event. Our zircon results reveal that Separation Point Suite plutonism lasted from ca. 129 Ma to ca. 110 Ma in the middle crust of eastern and central Fiordland. Deformation during this time was focused into a 20-km-wide, arc-parallel zone of deformation that includes previously unreported segments of a complex shear zone that we term the Grebe shear zone. Early deformation in the Grebe shear zone involved development of low-strain fabrics with shallowly plunging mineral stretching lineations from ca. 129 to 125 Ma. Titanites in these rocks are euhedral, are generally aligned with weak subsolidus fabrics, and give rock-average temperatures ranging from 675 °C to 700 °C. We interpret them as relict magmatic titanites that grew prior to low-strain fabric development. In contrast, deformation from ca. 125 to 116 Ma involved movement along subvertical, mylonitic shear zones with moderately to steeply plunging mineral stretching lineations. Titanites in these shear zones are anhedral grains/aggregates that are aligned within mylonitic fabrics and have rock-average temperatures ranging from ∼610 °C to 700 °C. These titanites are most consistent with (re)crystallization in response to deformation and/or metamorphic reactions during amphibolite-facies metamorphism. At the orogen scale, spatial and temporal patterns indicate that the Separation Point Suite flare-up commenced during low-strain deformation in the middle crust (ca. 129–125 Ma) and peaked during high-strain, transpressional deformation (ca. 125–116 Ma), during which time the magmatic arc axis widened to 70 km or more. We suggest that transpressional deformation during the arc flare-up event was an important process in linking melt storage regions and controlling the distribution and geometry of plutons at mid-crustal levels.
Ambulatory Smoking Habits Investigation based on Physiology and Context (ASSIST) using wearable sensors and mobile phones: protocol for an observational study
Authors: Zhai Donghui , Schiavone Giuseppina , Van Diest Ilse , Vrieze Elske , DeRaedt Walter , Van Hoof Chris 
Published: September 2019

IntroductionSmoking prevalence continues to be high over the world and smoking-induced diseases impose a heavy burden on the medical care system. As believed by many researchers, a promising way to promote healthcare and well-being at low cost for the large vulnerable smoking population is through eHealth solutions by providing self-help information about smoking cessation. But in the absence of first-hand knowledge about smoking habits in daily life settings, systems built on these methods often fail to deliver proactive and tailored interventions for different users and situations over time, thus resulting in low efficacy. To fill the gap, an observational study has been developed on the theme of objective and non-biased monitoring of smoking habits in a longitudinal and ambulatory mode. This paper presents the study protocol. The primary objective of the study is to reveal the contextual and physiological pattern of different smoking behaviours using wearable sensors and mobile phones. The secondary objectives are to (1) analyse cue factors and contextual situations of smoking events; (2) describe smoking types with regard to users’ characteristics and (3) compare smoking types between and within subjects.Methods and analysesThis is an observational study aimed at reaching 100 participants. Inclusion criteria are adults aged between 18 and 65 years, current smoker and office worker. The primary outcome is a collection of a diverse and inclusive data set representing the daily smoking habits of the general smoking population from similar social context. Data analysation will revolve around our primary and secondary objectives. First, linear regression and linear mixed model will be used to estimate whether a factor or pattern have consistent (p value<0.05) correlation with smoking. Furthermore, multivariate multilevel analysis will be used to examine the influence of smokers’ characteristics (sex, age, education, socioeconomic status, nicotine dependence, attitudes towards smoking, quit attempts, etc), contextual factors, and physical and emotional statuses on their smoking habits. Most recent machine learning techniques will also be explored to combine heterogeneous data for classification of smoking events and prediction of craving.Ethics and disseminationThe study was designed together by an interdisciplinary group of researchers, including psychologist, psychiatrist, engineer and user involvement coordinator. The protocol was reviewed and approved by the ethical review board of UZ Leuven on 18 April 2016, with an approval number S60078. The study will allow us to characterise the types of smokers and triggering events. These findings will be disseminated through peer-reviewed articles.
Doctor, how can we help you? Qualitative interview study to identify key interventions to target burnout in hospital doctors
Authors: Walsh Gillian , Hayes Blánaid , Freeney Yseult , McArdle Siobhain 
Published: September 2019

ObjectiveTo identify priority interventions for the prevention and reduction of work stress and burnout in hospital doctors through analysis of (1) doctors’ experiences of work stress and burnout and (2) their preferences with respect to interventions.DesignQualitative design using semistructured interviews analysed with deductive thematic analysis.SettingHospitals in Ireland.Participants32 hospital doctors (16 practising consultants and 16 doctors in training) from a range of specialties, career stages, hospital types and locations.ResultsPractical, system-focused interventions were found to be most needed. Challenges with basic entitlements, that is, accessing statutory leave, knowing in advance when leave can be taken and being adequately covered when on leave were identified as requiring urgent attention. Other priority interventions identified were the integration of psychological support in the everyday working environment, time and training for clinical line managers to perform key management activities such as debriefing and education interventions which highlight work stress risks and care pathways, teach self-care and train doctors in how to support one another.ConclusionsHospital doctors are feeling the effects of greater demand and fewer resources. What they most urgently need is adequate staffing levels, access to statutory leave and adequate cover when on leave. Doctors do not receive the support they need from their clinical line managers, who lack the skills and time to excel as people managers. Organisations should focus on developing clinical management skills across the system. The culture of medicine needs to change from stigmatisation and competitiveness to compassion and collaboration. Organisations, medical schools and professional bodies can steer this change through education.
Fatty liver index as a predictor of increased risk of cardiometabolic disease: finding from the Kuopio Ischaemic Heart Disease Risk Factor Study Cohort
Authors: Olubamwo Olubunmi O. , Virtanen Jyrki K. , Pihlajamaki Jussi , Mantyselka Pekka , Tuomainen Tomi-Pekka 
Published: September 2019

ObjectiveFatty liver disease (FLD), a global epidemic, is also a predictor of cardiometabolic disease (CMD) (type 2 diabetes or cardiovascular disease). Our objective was to examine whether progressive FLD, as assessed by fatty liver index (FLI), predicts increasing future CMD risk compared with relatively stable FLD, among middle-aged men.DesignProspective epidemiological study.SettingUniversity affiliated research centre in Kuopio, Eastern Finland.ParticipantsOur subjects were 501 men without CMD during the initial 4-year follow-up in the Kuopio Ischaemic Heart Disease Risk Factor Study cohort.Outcome measureOver the initial 4-year follow-up, 135 men (26.9%) had a significant (≥10) FLI increase. The association of 4-year FLI increase with incident CMD was analysed in multivariable-adjusted Cox regression models, adjusting for baseline constitutional and lifestyle factors (model 1) and, in addition, metabolic and inflammation biomarker factors (model 2).ResultsDuring a mean follow-up of 15 years, 301 new CMD cases occurred. We used subjects with low baseline FLI and no significant 4-year FLI increase as the reference. For subjects with intermediate baseline FLI and significant 4-year FLI increase, the HRs and 95% CIs for incident CMD in model 1 (2.13 (1.45 to 3.13)) and model 2 (1.73 (1.13 to 2.66)) exceeded values for subjects with similar baseline FLI without a significant 4-year change (HRs (95% CIs) were 1.36 (0.94 to 1.97) for model 1 and 1.18 (0.81 to 1.70) for model 2). They approached HRs (95% CI) for subjects who maintained high FLI over the 4 years (HRs (95% CIs) were 2.18 (1.54 to 3.10) in model 1 and 1.85 (1.21 to 2.82) in model 2).ConclusionPersons with significant FLI increase are likely with increasing CMD risk. Such persons should be evaluated for progressive FLD and CMD and managed to reduce CMD risk.
Haemoglobin concentration and survival of haemodialysis patients before and after experiencing cardiovascular disease: a cohort study from Japanese dialysis outcomes and practice pattern study (J-DOPPS)
Authors: Kido Ryo , Akizawa Tadao , Fukuhara Shunichi 
Published: September 2019

ObjectivesDifferences in the association of haemoglobin concentration with mortality or adverse cardiovascular events in haemodialysis patients before and after experiencing cardiovascular disease are unclear. We aimed to assess the influence of cardiovascular-comorbid condition on the association between haemoglobin concentration and mortality.DesignA prospective cohort study.SettingThe Dialysis Outcomes and Practice Patterns Study Dialysis in phases 2 to 4 (2002 to 2011), including 80 randomly selected dialysis facilities in Japan (J-DOPPS).Participants5515 adult haemodialysis patients.Primary and secondary outcome measuresPrimary outcome was all-cause mortality. Cardiovascular mortality and adverse cardiovascular events were also evaluated. The association of these outcomes with haemoglobin concentration, categorised into six classes by 1.0 g/dL units, and cardiovascular-comorbid condition, treated as a time-dependent variable updated every 4 months, was evaluated. Adjusted hazard ratios (aHRs) were computed using a time-dependent Cox model with interaction test for cardiovascular comorbidity.ResultsOver a median 2.0 years, 847 all-cause and 326 cardiovascular deaths, and 1000 adverse cardiovascular events occurred. Compared with haemoglobin 11.0 to 11.9 g/dL, the aHRs of mortality at the lowest range (<9.0 g/dL) were 1.29 (95% CI 0.95 to 1.76) and 2.11 (95% CI 1.47 to 3.06) in cardiovascular-comorbid and non-cardiovascular-comorbid patients, respectively (p=0.04 for cardiovascular-comorbid interaction), with increased cardiovascular mortality in both groups. At the second-lowest range (9.0 to 9.9 g/dL), mortality was increased only in non-cardiovascular-comorbid patients. Respective risks for mortality and adverse cardiovascular events at the second-highest range (12.0 to 12.9 g/dL) were non-significant but increased in both groups, while adverse cardiovascular events were increased at the highest range (≥13.0 g/dL) in non-cardiovascular-comorbid patients.ConclusionsThe association of low haemoglobin concentration with all-cause mortality differed between haemodialysis patients with and without cardiovascular comorbidity. Cardiovascular-comorbid condition should be considered when the association of haemoglobin concentration with mortality is addressed.
Scoping review protocol: effectiveness of individualised nutritional care plans to reduce malnutrition during hospitalisation and up to 3 months after discharge
Authors: Ingstad Kari , Uhrenfeldt Lisbeth , Kymre Ingjerd Gåre , Skrubbeltrang Conni , Pedersen Preben Ulrich 
Published: September 2019

IntroductionMore than 20% of patients are malnourished after hospitalisation. Malnutrition may negatively impact patients’ outcomes as it increases the risk of complications, morbidity, mortality and loss of function. However, hospital-initiated transitional care can improve some outcomes in hospitalised adult patients. The objective of this scoping review is to map the literature that assesses the effectiveness of individualised nutritional care plans to reduce malnutrition during hospitalisation and for the first 3 months after discharge.Methods and analysisThis protocol is based on the framework outlined by Arksey and O’Malley. The search strategy was developed by a medical librarian. We will search for relevant literature from the following databases: MEDLINE via PubMed, Cumulative Index to Nursing and Allied Health Literature, and Embase. We will also search the reference lists of included studies. Two independent reviewers will screen abstracts and full articles in parallel, from the included studies using specific inclusion and exclusion criteria. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocols checklist facilitated the preparation of this research protocol. The scoping review will provide a narrative account of the findings from the existing literature through thematic content analysis of the extracted literature.Ethics and disseminationSince all data will be obtained from publicly available materials, research ethics approval is not required for this scoping review. The research findings will be submitted for publication in a relevant open-access peer-reviewed journal and presented at relevant conferences.
Pulmonary artery size is associated with functional clinical status in the Fontan circulation
Authors: Ridderbos Floris-Jan S , Bonenkamp Bregje E , Meyer Sophie L , Eshuis Graziella , Ebels Tjark , van Melle Joost P , Willems Tineke P , Berger Rolf M F 
Published: September 2019

ObjectiveIn the Fontan circulation, non-pulsatile pulmonary blood flow is suggested to negatively affect pulmonary artery growth. The pulmonary vasculature is regarded a key determinant of outcome after Fontan completion. We hypothesised that in Fontan patients pulmonary artery size correlates with follow-up and functional clinical status.MethodsThis is a single-centre, cross-sectional cohort study. Thirty-nine paediatric and adult Fontan patients with a concomitant cardiac magnetic resonance (CMR) scan and a cardiopulmonary exercise test between 2012 and 2013 were included. CMR-derived left and right pulmonary artery cross-sectional areas were expressed as Nakata index. Functional status was defined as peak oxygen consumption (pVO2) indexed for weight, as percentage of predicted (pred) and as New York Heart Association Functional Class (NYHA-FC).ResultsAge at CMR was 18±7.2 years. Time since Fontan completion was 11.9±7.4 years. Nakata index was lower versus the reference values (238.6±78.5 vs 330±30 mm2/m2, p<0.001). Nakata index correlated negatively with age at CMR (r=−0.393, p=0.013) and time since Fontan completion (r=−0.341, p=0.034). pVO2 was 27.9±8.9 mL/min/kg and pVO2pred was 58.1%±14.1%. Nakata index correlated positively with pVO2 (r=0.468, p=0.003) and pVO2pred (r=0.353, p=0.028). Nakata index correlated negatively with NYHA-FC (r=−0.450, p=0.004). Nakata index was an independent predictor (β=0.359, p=0.007) for pVO2 (adjusted R2=0.442, with maximum heart rate and oxygen pulse at peak exercise).ConclusionsPulmonary artery size expressed as Nakata index is a novel independent predictor for functional clinical status. Nakata index negatively correlated with follow-up duration, suggesting that chronic abnormal non-pulsatile pulmonary blood flow plays a role in lagging pulmonary arterial growth in the Fontan circulation.
Polymer matrix ferroelectric composites under pressure: Negative electric capacitance and glassy dynamics
Authors: Starzonek Szymon , Drozd-Rzoska Aleksandra , Rzoska Sylwester J. , Zhang Kena , Pawlikowska Emilia , Kȩdzierska-Sar Aleksandra , Szafran Mikolaj , Gao Feng 
Published: September 2019

Abstract.
This report presents the results of high-pressure and broadband dielectric spectroscopy studies in polyvinylidene difluoride (PVDF) and barium strontium titanate (BST) microparticles composites (BST/PVDF). It shows that the Arrhenius behaviour for the temperature-related dynamics under atmospheric pressure is coupled to Super-Arrhenius/Super-Barus isothermal pressure changes of the primary relaxation time. Following these results, an explanation of the unique behaviour of the BST/PVDF composite is proposed. Subsequently, it is shown that when approaching the GPa domain the negative electric capacitance phenomenon occurs.

Graphical abstract