bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rheological impact and economic implications of partial to total substitution of imported bentonite clay for oil and gas drilling operations in Nigeria
Authors: Ogolo Oghenerume , Arinkoola Akeem , Osisanya Samuel , Egede Frank , Chior Ternenge Joseph 
Published: December 2020

AbstractIn less than a decade, there have been two global meltdowns of crude oil price and the latest was caused by the spread of coronavirus disease (COVID-19) in 2020. This is expected to have a negative impact on the global economy, especially on those countries that depend more on the revenue from sales of crude oil. One of the measures that can be taken to survive this kind of situation in the future is to reduce the unit technical cost for producing a barrel of oil by using locally available materials. This research investigated a local clay sourced from Ropp in Plateau State, Nigeria, by considering its rheological characteristics and economic implications of using it for partial to total substitution of imported bentonite clay for oil and gas drilling operations. The local clay was termed as Ropp bentonite clay (RBC). Various spud mud samples were prepared by dispersing a mixture of imported bentonite clay (IBC) and RBC (0–100%) in 350 ml of water. Certain quantity (0–1 g) of polyacrylamide cellulose was added to the mud samples before rheological and physical properties were determined using the standard API procedure. An economic model was built to determine the cost implications of using any of the mud formulations at different consumption rates. The results show that IBC–RBC blend in the right proportion could save Nigeria 12 to 36% of the cost of bentonite clay used to drill wells in the country.
Burnout and engagement among PhD students in medicine: the BEeP study
Authors: Kusurkar Rashmi A. , Van der Bur Stéphanie M. E. , Isik Ulviye , Mak-van der Vossen Marianne , Wilschut Janneke , Wouters Anouk , Koster Andries S. 
Published: December 2020

Introduction Using a self-determination theory framework, we investigated burnout and engagement among PhD students in medicine, and their association with motivation, work-life balance and satisfaction or frustration of their basic psychological needs.
Method This cross-sectional study was conducted among PhD students at a university medical centre (n = 990) using an electronic survey on background characteristics and validated burnout, engagement, motivation and basic psychological needs questionnaires. Cluster analysis was performed on the burnout subscale scores to find subgroups within the sample which had similar profiles on burnout. Structural equation modelling was conducted on a hypothesized model of frustration of basic psychological needs and burnout.
Results The response rate was 47% (n = 464). We found three clusters/subgroups which were composed of PhD students with similar burnout profiles within the cluster and different profiles between the clusters. Cluster 1 (n = 199, 47%) had low scores on burnout. Clusters 2 (n = 168, 40%) and 3 (n = 55, 13%) had moderate and high burnout scores, respectively, and were associated with low engagement scores. Cluster 3, with the highest burnout scores, was associated with the lowest motivational, engagement, needs satisfaction and work-life balance scores. We found a good fit for the “basic psychological needs frustration associated with burnout” model.
Discussion The most important variables for burnout among PhD students in medicine were lack of sleep and frustration of the basic psychological needs of autonomy, competence and relatedness. These add to the factors found in the literature.
Simplified surface heat source distribution for GMAW process simulation based on the EDACC principle
Authors: Mokrov O. , Simon M. S. , Sharma R. , Reisgen U. 
Published: December 2020

AbstractA simplified surface heat source for gas metal arc welding (GMAW) process simulation based on the principle of evaporation determined arc cathode coupling (EDACC) is presented. It allows for a simple implementation in any GMAW weld pool simulation and is dependent on the width of the arc, as well as the weld pool surface temperature, but it can also be applied with the temperature and iron vapor density of the plasma instead of the width of the arc, if available. While it is considered separately from the droplets, it gives the heat flux as well as the current density distribution onto the weld pool surface, which are in general not axis-symmetric. The heat source distribution is normalized and multiplied to the value of any total heat and total current and it allows to calibrate for the maximum weld pool surface temperature. For the ionization and evaporation, only iron atoms are considered, and the shielding gas is assumed as argon. The result is given in graphical form as well as in the form of easy to implement functions for a reasonable range.
Urinary vitronectin identifies patients with high levels of fibrosis in kidney grafts
Authors: Carreras-Planella Laura , Cucchiari David , Cañas Laura , Juega Javier , Franquesa Marcella , Bonet Josep , Revuelta Ignacio , Diekmann Fritz , Taco Omar , Lauzurica Ricardo , Borràs Francesc Enric 
Published: December 2020

Abstract
Background
In kidney transplantation, fibrosis represents the final and irreversible consequence of the pathogenic mechanisms that lead to graft failure, and in the late stages it irremediably precedes the loss of renal function. The invasiveness of kidney biopsy prevents this condition from being frequently monitored, while clinical data are rather unspecific. The objective of this study was to find noninvasive biomarkers of kidney rejection.

Methods
We carried out proteomic analysis of the urinary Extracellular Vesicles (uEVs) from a cohort of kidney transplant recipients (n = 23) classified according to their biopsy-based diagnosis and clinical parameters as interstitial fibrosis and tubular atrophy (IFTA), acute cellular rejection (ACR), calcineurin inhibitors toxicity (CNIT) and normal kidney function (NKF).

Results
Shotgun mass spectrometry of uEV-proteins identified differential expression of several proteins among these different groups. Up to 23 of these proteins were re-evaluated using targeted proteomics in a new independent cohort of patients (n = 41) classified in the same diagnostic groups. Among other results, we found a differential expression of vitronectin (VTN) in patients displaying chronic interstitial and tubular lesions (ci and ct mean > 2 according to Banff criteria). These results were further confirmed by a pilot study using enzyme-linked immunosorbent assay (ELISA).

Conclusion
Urinary vitronectin levels are a potential stand-alone biomarker to monitor fibrotic changes in kidney transplant recipients in a non-invasive fashion.
Coal-bearing strata sequence stratigraphy of Paleogene Meihe Formation, Meihe Basin, NE China
Authors: Bai Yueyue , Lü Qingtian , Liu Zhaojun , Sun Pingchang , Liu Rong , Yao Shuqing 
Published: December 2020

AbstractThe Meihe Basin is an important Paleogene coal-bearing basin located in the Dunhua-Mishan Fault Zone, northeastern China. Based on a comprehensive study of well logs, seismic profiles, cores and rock geochemical properties, the coal distribution, paleoenvironment evolution within a sequence stratigraphic framework and the accumulation model to explain how coal seams developed in small fault basin were discussed in detail. Three-third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin and the two coal-bearing sequences are the Lower Coal-bearing Member of Sequence I and the Upper Coal-bearing Member of Sequence III. All three types of system tracts are developed in both sequences, i.e., the lowstand systems tract (LST), the transgressive systems tract (TST), and the highstand systems tract (HST). In LST of Sequence I, fan delta plain marsh is the main coal accumulating environment where coal seams are thin, discontinuous and therefore uneconomic for mining, and it is the same with all coal seams developed in Sequence III. While in TST and HST of Sequence I, lake swamp is the main sedimentary environment where coal seams are thick, continuous, widely distributed, and thus economically attractive for mining. In the study area, the nice thick economical coal seams are usually developed in an ideal stable depositional environment where organic matter accommodation space grows at a balanced rate with peat, in other words, free of sediment input or channel migration. The key findings of this study could provide guidance for the exploration of coal seams in the Meihe Basin and other similar basins.
Fire as an Artifact—Advances in Paleolithic Combustion Structure Studies: Introduction to the Special Issue
Authors: Stahlschmidt Mareike C. , Mallol Carolina , Miller Christopher E. 
Published: December 2020

AbstractHearths present sedimentary features, artifacts, and direct evidence for maintained and controlled fire in the past. The use of hearths reflects regular access to fire and its diverse benefits. Among these benefits are cooked food, protection from the cold and from predators, and fire’s transformative power regarding raw materials. Hearths may have also served as focal points of activity at Paleolithic campsites and triggered changes in social structures. As sedimentary features, combustion structures function as behavioral as well as paleoenvironmental archives. The papers in this special issue focus on the former aspect, how combustion feature can serve as transmitters of behavior, and with what tools we can explore them. We here briefly present an overview on the range of topics explored in these papers, which include ethnoarchaeological research on fire use among recent hunter-gatherer groups, spatial analysis of burnt lithics, actualistic experiments regarding fire function and fire use in tool production.
Variations in the Number of Patients Presenting With Andrological Problems During the Coronavirus Disease 2019 Pandemic and the Possible Reasons for These Variations: A Multicenter Study
Authors: Duran Mesut Berkan , Yildirim Omer , Kizilkan Yalcin , Tosun Cagatay , Cirakoglu Abdullah , Gultekin Mehmet Hamza , Gul Umit , Altan Mesut , Sah Cem , Hasirci Eray , Ceyhan Erman , Ongun Sakir , Turunc Tahsin 
Published: December 2020

Abstract

Introduction
Coronavirus disease 2019 (COVID-19) pandemic caused unprecedented restrictions in outpatient services and surgical practices in urology as in other medical branches as well as in all areas of life.

Aim
To investigate whether there have been variations in the presentations of male patients with sexual and reproductive health problems to the outpatient urology clinics during the COVID-19 pandemic and to understand the underlying factors for these variations, if any.

Methods
Male patients aged ≥18 years who presented to the outpatient urology clinics in 12 centers across Turkey from February 1, 2020 to June 1, 2020 were retrospectively evaluated. The patients were divided into 2 groups: those who presented to the outpatient clinic from February 1, 2020 to March 11, 2020 comprised the “pre–COVID-19 pandemic period” group, whereas those who presented to the outpatient clinic from March 12, 2020 to June 1, 2020 comprised the “COVID-19 pandemic period” group and compared with each other.

Main Outcome Measures
The main outcome of this study was the number and diagnose of patients presented to urology outpatient clinics.

Results
Andrological problems were detected in 721 of 4,955 male patients included in the study. During the COVID-19 pandemic period, there was a significant increase in andrological diagnosis in these patients compared with the pre–COVID-19 pandemic period (n = 293 [17%] vs n = 428 [13.2%], P &lt; .001, respectively). Similarly, there was a statistically significant increase in the number of patients diagnosed with male reproductive or sexual health problems during the COVID-19 pandemic period (n = 107 [6.2%] vs n = 149 [4.6%], P = .016 and n = 186 [10.8%] vs n = 279 [8.6%], P = .013, respectively). The number of patients diagnosed with erectile dysfunction during the pandemic was also significantly higher than the pre–COVID-19 pandemic period (n = 150 [8.7%] vs n = 214 [6.6%], P = .008).

Conclusion
Presentations to the outpatient urology clinics owing to andrological problems markedly increased during the pandemic period. Although these problems are of multifactorial origin, psychogenic factors are also considered to significantly trigger these problems.
Radiofrequency Thermocoagulation in Refractory Focal Epilepsy: The Montreal Neurological Institute Experience
Authors: Mirza Farhan A. , Hall Jeffery A. 
Published: December 2020

ABSTRACT:Background:Radiofrequency thermocoagulation (RF-TC) is a minimally invasive ablative option for refractory focal epilepsy.Methods:A retrospective chart review was conducted of all patients who underwent stereoelectroencephalography (SEEG)-guided RF-TC at our institution.Results:Fourteen patients underwent robot-guided electrode implantation and subsequent RF-TC. After RF-TC, one of the three patients with PVNH was seizure free, one had 18 months of seizure freedom (Engel 2b), and one required temporal neocortical/PVNH resection (Engel 1a). One of the four patients with focal cortical dysplasia (FCD) was seizure free (Engel 1a), two attained seizure freedom after resection (Engel 1a and 1b), while one continues to have significant seizures (Engel 4b). One patient with cavernoma and low central area epileptogenic zone (EZ) did not benefit from RF-TC and is planned for resection. Two of the MRI-negative patients achieved seizure freedom for 3 months and 1 year, respectively, subsequently requiring resection (Engel 1a). One remains seizure free at 4 weeks. Three had seizure recurrence immediately (Engel 4b). With RF-TC alone, two patients (14%) achieved Engel 1a, two were seizure free at 1 year, one had 3 months of seizure freedom, while the rest had recurrence immediately or within a few weeks. 7/14 patients underwent secondary interventions after RF-TC. Overall, seven patients achieved Engel 1a or 1b, one each 2b and 3a, and five Engel 4b.Conclusion:At our institution, RF-TC is a safe ablative procedure for refractory focal epilepsy. It can serve as a segue to secondary interventions and appears promising in PVNH cases. Its role in MRI-negative cases is less clear.
Laser-induced damage thresholds of ultrathin targets and their constraint on laser contrast in laser-driven ion acceleration experiments
Authors: Wang Dahui , Shou Yinren , Wang Pengjie , Liu Jianbo , Mei Zhusong , Cao Zhengxuan , Zhang Jianmin , Yang Pengling , Feng Guobin , Chen Shiyou , Zhao Yanying , Schreiber Joerg , Ma Wenjun 
Published: December 2020

Abstract
Single-shot laser-induced damage threshold (LIDT) measurements of multi-type free-standing ultrathin foils were performed in a vacuum environment for 800 nm laser pulses with durations τ ranging from 50 fs to 200 ps. The results show that the laser damage threshold fluences (DTFs) of the ultrathin foils are significantly lower than those of corresponding bulk materials. Wide band gap dielectric targets such as SiN and formvar have larger DTFs than semiconductive and conductive targets by 1–3 orders of magnitude depending on the pulse duration. The damage mechanisms for different types of targets are studied. Based on the measurement, the constrain of the LIDTs on the laser contrast is discussed.
The Civic Culture(s): Groups, Norms, and the Health of Democracy
Authors: Kingzette Jon , Neblo Michael A. 
Published: December 2020

AbstractDemocratic institutions need a healthy “civic culture” to function well. Many worry that civic cultures today are decaying in the United States and other established democracies. We note two problems with these assessments. First, there are several ways to measure civic culture, but scholars typically focus only on their preferred approach. Second, most scholars assume a single civic culture, despite racial, ethnic, class, and other differences. So talk of “the” civic culture erases non-dominant groups. Without a framework to integrate different approaches and account for group variation, we cannot assess decline, nor specify for whom. And without those, we are unable to intervene to make things better. We introduce a theory of civic culture as a system of norms that integrates the main approaches to measuring civic culture and does so in a way that leads to a principled framework for understanding racial, ethnic, and other group variation within countries.
GARIBALDI IN AUSTRALIA
Authors: PICKERING PAUL A. 
Published: December 2020

AbstractOne of the most famous public figures in later nineteenth-century Australia was Giuseppe Garibaldi. The man known as the ‘hero of two worlds’ – Europe and South America – was in fact also the hero of a third. The nature of Garibaldi's iconic status in the Australian colonies was complex, multi-faceted, and fractured and it occurred at a moment when the notion of celebrity was being transformed amid what was effectively a fundamental democratization of the public sphere in the Anglophone world. As such, it provides an important opportunity to ponder the implications of what has been called ‘intimacy at a distance’.
Fracturing Constitutional Rights: The Prosecution of Alleged Broadcast Infringers in Nigeria
Authors: Sodipo Bankole 
Published: December 2020

AbstractInfringement of broadcasts is often treated as a crime. The Nigerian Constitution guarantees that no-one can be prosecuted for any act that is not prescribed in a written law. Section 20 of Nigeria's Copyright Act only criminalizes dealing with infringing copies. A “copy” is defined in terms of material form. An infringing broadcast therefore connotes a recorded broadcast or a copy of a broadcast. This article argues that, statutorily, not every act that gives rise to civil liability for broadcast copyright infringement constitutes a crime. The article reviews the first broadcast copyright prosecution Court of Appeal decision in Eno v Nigerian Copyright Commission. Eno was unlawfully prosecuted, convicted and imprisoned. The article seeks to stem the wave of prosecutions on the type of charges used in Eno. In the absence of law reform, the prosecutions based on the line of charges in Eno constitute a fracturing of constitutional rights.
Cochlear nerve anomalies in paediatric single-sided deafness – prevalence and implications for cochlear implantation strategies
Authors: Pollaers K , Thompson A , Kuthubutheen J 
Published: December 2020

AbstractObjectiveTo determine the prevalence of cochlear nerve anomalies on magnetic resonance imaging in patients with unilateral or bilateral sensorineural hearing loss.MethodsA retrospective case series was conducted at a tertiary referral centre. The inclusion criteria were paediatric patients with bilateral or unilateral sensorineural hearing loss, investigated with magnetic resonance imaging. The primary outcome measure was the rate of cochlear nerve hypoplasia or aplasia.ResultsOf the 72 patients with unilateral sensorineural hearing loss, 39 per cent (28 cases) had absent or hypoplastic cochlear nerves on the affected side. Fifteen per cent (11 cases) had other abnormal findings on magnetic resonance imaging. Eighty-four patients had bilateral sensorineural hearing loss, of which cochlear nerve hypoplasia or aplasia was identified only in 5 per cent (four cases). Other abnormal findings were identified in 14 per cent (12 cases).ConclusionPaediatric patients with unilateral sensorineural hearing loss are more likely to have cochlear nerve anomalies than those patients with bilateral sensorineural hearing loss. This has important implications regarding cochlear implantation for patients with single-sided deafness.
On the Relation Between Collective Responsibility and Collective Duties
Authors: de Haan Niels 
Published: December 2020

AbstractThere is good reason to think that moral responsibility as accountability is tied to the violation of moral demands. This lends intuitive support to Type-Symmetry in the collective realm: A type of responsibility entails the violation or unfulfillment of the same type ofall-things-consideredduty. For example, collective responsibility necessarily entails the violation of a collective duty. But Type-Symmetry is false. In this paper I argue that a non-agential group can be collectively responsible without thereby violating a collective duty. To show this I distinguish between four types of responsibility and duty in collective contexts: corporate, distributed, collective, shared. I set out two cases: one involves a non-reductive collective action that constitutes irreducible wrongdoing, the other involves a non-divisible consequence. I show that the violation of individual or shared duties both can lead to irreducible wrongdoing for which only the group is responsible. Finally, I explain why this conclusion does not upset any work on individual responsibility.
A review and analysis of the components of potentially effective perinatal mental health interventions for infant development and mother-infant relationship outcomes
Authors: Newton Katherine , Taylor Buck Elizabeth , Weich Scott , Uttley Lesley 
Published: December 2020

AbstractChildren of mothers with serious mental health difficulties are at increased risk of developing mental health difficulties themselves in their own lifetime. Specialist interventions delivered in perinatal mental health services offer an opportunity to support the infant's development and long-term mental health. This review aimed to systematically evaluate the shared elements of successful perinatal mental health interventions that underpin improved outcomes for infants whose mothers experience perinatal mental health difficulties. Nine electronic databases were searched comprehensively for relevant controlled studies of perinatal mental health interventions, and a narrative synthesis undertaken to assess whether statistically significant benefits were noted. Sixteen studies, trialing 19 interventions, were analyzed using a narrative approach and grouped according to reported effectiveness. Eight interventions demonstrated significant improvements in infant outcomes and/or mother–infant relationship outcomes and were used to inform the analysis of the included interventions’ components. While the interventions identified were diverse, there were common components which potentially underpin successful interventions for infants whose mothers are experiencing mental health difficulties, including: facilitation of positive Mother×Infant interactions; helping mothers to understand their infant's perspective or inner world; and the use of video feedback.
Historical Mistranslations: Identity, Slavery, and Genre in Eighteenth-Century India
Authors: KHOJA NEELAM 
Published: December 2020

AbstractColonial and postcolonial historians writing in English relied upon an emancipated slave's eighteenth-century Persian text,Tahmās Nāma, to construct the history of the Punjab in the same period. In this process, they have mistranslated the text and the genre. Rather than readingTahmās Nāmaas factual history or as a moral text of refinement, this article argues that if we return to the original account, in Persian, we see that the text is primarily auto/biographical. While this auto/biography does provide some insight into eighteenth-century political history of the Punjab and Mughal Hindustan, it—more importantly—sheds light on the ethnic, religious, social, economic and gendered lives of the author, Miskin, and the people whom he includes in his narrative. These intersecting and overlapping identities have been erased, flattened or misrepresented in translations of the text. Based on a re-reading of the auto/biography in its original language, this article considers how identity and slavery—conceptual categories of the present that are elided in the mistranslations—function in the text, and how those categories were understood, negotiated and leveraged during the eighteenth century.