bluuebunny/crossref_metadata_2025_split huggingface dataset:
Film Thickness and Friction Investigations in a Fluid Film Thrust Bearing Employing A New Conceived Micro-Texture on Pads
Authors: Atwal J. C. , Pandey R. K. 
Published: September 2020

Abstract
This paper presents the performance behaviors (coefficient of friction, minimum film thickness, and pressure distributions) of a fluid film thrust bearing using a newly conceived micro-texture on pads. In the numerical investigation, the Reynolds equation has been discretized using the finite element formulation followed by the solution of algebraic equations employing the Fischer-Burmeister-Newton-Schur (FBNS) algorithm, which satisfies the mass-conservation phenomenon arising due to the commencement of cavitation in the lubricating film. The effects of parameters (micro-texture/pocket depth, circumferential/radial length of micro-texture and pocket, etc.) of new texture on the performance behaviors of the thrust bearing have been explored and presented herein for the range of input data. It has been found that the minimum film thickness has increased up to 48%, and the friction coefficient reduced up to 24% in comparison to conventional plain pad case.
Concise Data Set Formulation for Dynamically Loaded Conformal Elastohydrodynamic Lubrication Problems
Authors: Boedo S. 
Published: September 2020

AbstractThis paper introduces a concise data set formulation for efficient modeling of dynamically loaded conformal elastohydrodynamic lubrication (EHL) problems. The data set represents the structural elasticity of the bearing members and is constructed independently of the lubricant film model. Data set construction involves modification of a previously published mode-based EHL formulation such that the resulting structural information is insensitive to changes in finite-element mesh density and thus to the modeling process itself. Curve-fitted expressions of modal information are introduced for elastic structures, which otherwise would normally be represented by large structural matrices. A data set is formulated for the sample case of a dynamically loaded big-end connecting-rod bearing, and the resulting bearing performance agrees well with previously published node- and mode-based EHL methods.
Genotoxic and Mutagenic Activity of Particulate Matter Gathered in a High Emitter Automotive Diesel Engine Operated With Different Palm Oil-Derived Biofuels
Authors: Mendoza Carolina , Orozco Luz Yaneth , Palacio Jaime , López Andrés F. , Agudelo John R. 
Published: September 2020

Abstract
The need to substitute fossil fuels with energy alternatives has favored the development of biodiesel and green diesel, which generate less amount of particulate matter (PM), but their biological reactivity is unknown, an important factor of quality and risk. Therefore, the genotoxicity and mutagenicity potential of PM emitted by the combustion of mixtures of green diesel and palm biodiesel with petroleum diesel has been evaluated; 10% palm biodiesel (B10), 10% and 30% green diesel (HVO10 and HVO30) and ultralow sulfur diesel (ULSD) were subjected to combustion at two engine operating speeds: 1890 and 2410 rpm. From each PM sample, the organic fraction was extracted to evaluate the mutagenicity with the Ames test in the presence and absence of microsomal enzymes, and the genotoxicity with the alkaline comet assay, while in the Ames test, concentrations of equivalent 3, 1.5, and 0.8 μg of PM/µl were considered; in the comet assay, equivalent 3.1, 6.3, and 12.5 μg of PM/µl were tested. The organic fraction of the PM from the ULSD was the least genotoxic and mutagenic. In contrast, the organic fraction of the PM of HVO30 showed the highest genotoxic and mutagenic activity (p &lt; 0.05). Although the genotoxic potential of PM generated at 1890 rpm, low speed, was slightly higher, no relationship was found regarding the engine operating speed. The results of this investigation show that the fuel extraction method and the mixture with the petroleum diesel affect the quality of the PM and, therefore, its biological activity. Consequently, the physicochemical monitoring of the PM should be complemented with biological procedures to evaluate the quality of alternative fuels and protect the environmental health.
Association between right atrial area measured by echocardiography and prognosis among pulmonary arterial hypertension: a systematic review and meta-analysis
Authors: Liu Ke , Zhang Chunhua , Chen Bingyu , Li Mingfeng , Zhang Peican 
Published: September 2020

ObjectiveThe purpose of this meta-analysis was to evaluate the association between enlarged right atrial area (RAA), as measured by echocardiography, and prognosis of patients with pulmonary arterial hypertension (PAH).DesignSystematic review and meta-analysis.Data sourcesTo identify potential publications, a comprehensive literature search through MEDLINE, the Cochrane database and the Embase database was performed up to December 2019.Eligibility criteria for selecting studiesStudies were included if they reported Cox regression based-HRs with 95% CIs for all-cause mortality or composite endpoint consisting of death and PAH-related events for echocardiography measurements of the RAA or the right atrial area index (RAAI) in patients with PAH.Data extraction and synthesisThe unadjusted HR with 95% CI was extracted for the final pooled analysis. A random-effects model was used to determine the value of RAA/RAAI in the prognosis of patients with PAH. The data heterogeneity among the studies was estimated by the I2statistic and the Cochran Q-statistic.ResultsTwelve studies with a total of 1085 patients with PAH were finally included in the meta-analysis. These studies had a mean follow-up time ranging from 9.2 months to 5.0 years. Their findings showed that patients with PAH with enlarged RAA/RAAI were associated with poor prognosis. The risk of all-cause mortality in patients with PAH was found to statistically increase by 50% for every 5-unit increase in RAA/RAAI (HR 1.50, 95% CI 1.28 to 1.75, p<0.001). Similarly, the risk of the composite endpoint also significantly increased by 53% for every 5-unit increase in RAA/RAAI (HR 1.53, 95% CI 1.23 to 1.89, p<0.001). Subgroup analyses in which the patients were stratified by RAA and RAAI were consistent with the main results.ConclusionThe meta-analysis suggested that enlarged RAA/RAAI were associated with increased risk of poor prognosis in patients with PAH.
Study protocol: a prospective cohort on non-communicable diseases among primary healthcare users living in Kosovo (KOSCO)
Authors: Obas Katrina Ann , Gerold Jana , Bytyçi-Katanolli Ariana , Jerliu Naim , Kwiatkowski Marek , Ramadani Qamile , Statovci Shukrije , Zahorka Manfred , Probst-Hensch Nicole 
Published: September 2020

IntroductionWith the lowest life expectancy in the Balkans, underlying causes of morbidity in Kosovo remain unclear due to limited epidemiological evidence. The goal of this cohort is to contribute epidemiological evidence for the prevention and control of non-communicable diseases such as depression, hypertension, diabetes and chronic respiratory disease in Kosovo as the basis for policy and decision-making, with a spotlight on the relationships between non-experimental primary healthcare (PHC) interventions and lifestyle changes as well as between depression and the course of blood pressure.Methods and analysisPHC users aged 40 years and above were recruited consecutively between March and October 2019 from 12 main family medicine centres across Kosovo. The data collected through interviews and health examinations included: sociodemographic characteristics, social and environmental factors, comorbidities, health system, lifestyle, psychological factors and clinical attributes (blood pressure, height, weight, waist/hip/neck circumferences, peak expiratory flow and HbA1c measurements). Cohort data were collected annually in two phases, approximately 6 months apart, with an expected total follow-up time of 5 years.Ethics and disseminationEthical approvals were obtained from the Ethics Committee Northwest and Central Switzerland (Ref. 2018-00994) and the Kosovo Doctors Chamber (Ref. 11/2019). Cohort results will provide novel epidemiological evidence on non-communicable diseases in Kosovo, which will be published in scientific journals. The study will also examine the health needs of the people of Kosovo and provide evidence for health sector decision-makers to improve service responsiveness, which will be shared with stakeholders through reports and presentations.
Burden of tinea capitis among children in Africa: protocol for a systematic review and meta-analysis of observational studies, 1990–2020
Authors: Bongomin Felix , Olum Ronald , Nsenga Lauryn , Baluku Joseph Baruch 
Published: September 2020

IntroductionTinea capitis is the most common form of dermatophytosis among children, contributing significantly to the global burden of skin and hair infections. However, an accurate account of its burden in Africa, where most cases are thought to occur, is lacking. We aim to systematically evaluate the burden, aetiology and epidemiological trend of tinea capitis among children over a 30-year period in Africa.Methods and analysisA systematic review will be conducted using Embase, PubMed, African Journals Online, Web of Science and the Cochrane Library of Systematic Review. These resources will be used to identify studies published between 1990 and December 2020, which report the prevalence, aetiology and trend of tinea capitis among children younger than 18 years in Africa. Articles in English and French will be considered. Two independent reviewers will screen the articles for eligibility, and any discrepancies will be resolved by discussion and consensus between the authors. Methodological quality of all studies will be assessed and critically appraised. We will perform a metaregression to assess the impact of study characteristics on heterogeneity and also to correct the meta-analytical estimates for biases. A qualitative synthesis will be performed, and STATA V.16.0 software will be used to estimate the pooled prevalence and aetiology of tinea capitis. The Mann-Kendall trend test will be use to evaluate the trend in the prevalence of tinea capitis over the study period.Ethics and disseminationEthical approval from an institutional review board or research ethics committee is not required for this systematic review and meta-analysis. The results will be published in a peer-reviewed journal and presented in conferences.
Risk factors for gastric cancer and related serological levels in Fujian, China: hospital-based case–control study
Authors: Yuan Ping , Lin Lan , Zheng Kuicheng , Wang Wen , Wu Sihan , Huang Liangxiang , Wu Bingshan , Chen Tiehui , Li Xiaoqing , Cai Lin 
Published: September 2020

ObjectiveTo explore the relationships between gastric cancer and serum pepsinogen I (PG I), PG II, PG I/II ratio, gastrin 17 (G-17) and Helicobacter pylori infection, and to investigate dietary and lifestyle risk factors for gastric cancer in Fujian Province, China.DesignA hospital-based, 1:1 matched case–control study.SettingPatients with newly diagnosed gastric cancer were recruited from the Fujian Provincial Hospital and the No. 900 Hospital of the Joint Support Force of the Chinese People’s Liberation Army between July 2014 and December 2016.ParticipantsA total of 180 pairs of patients with gastric cancer and control subjects were recruited in the study, including 134 (74.4%) male pairs and 46 (25.6%) female pairs.Investigation and analysis measuresSerological indicators were tested with ELISA kits. Dietary, lifestyle and psychological factors were investigated through face-to-face questionnaire. Relationships between gastric cancer and these influencing factors were examined by Χ2 test and conditional logistic regression.ResultsSerum PG II and G-17 levels and H. pylori infection rate were higher in patients with gastric cancer than in control subjects (p<0.05), while PG I/II ratio was lower in patients with gastric cancer (p<0.05). Serum G-17 levels were higher in patients with corpus gastric cancer than in patients with antral gastric cancer (p<0.05). Serum PG II levels were higher in patients with advanced gastric cancer than in patients with early-stage cancer (p<0.05), however, PG I/II ratio was lower in patients with advanced-stage gastric cancer than in patients with early-stage cancer (p<0.05). Eating hot food (OR=2.32), eating pickled vegetables (OR=4.05) and often feel troubled (OR=2.21) were found to significantly increase the risk of gastric cancer (all p<0.05), while consuming onion or garlic (OR=0.35), drinking tea (OR=0.26), eating fresh fruits (OR=0.55), and high serum PG I (OR=0.99) or PG I/II ratio (OR=0.73) were found to be protective against gastric cancer.ConclusionStudy results showed that serum PG, G-17 and H. pylori antibodies could be useful indicators for early diagnosis of gastric cancer. Increase in serum G-17 level might indicate the location of gastric cancer. Increase in serum PG II level and decrease in PG I/II ratio might imply the clinical stage. Eating hot food, eating pickled vegetables and often feel troubled may be risk factors for gastric cancer, while eating fresh fruits, eating onion or garlic, and drinking tea may be protective factors against the disease.
Multisystem comorbidities in classic Rett syndrome: a scoping review
Authors: Fu Cary , Armstrong Dallas , Marsh Eric , Lieberman David , Motil Kathleen , Witt Rochelle , Standridge Shannon , Lane Jane , Dinkel Tristen , Jones Mary , Hale Katie , Suter Bernhard , Glaze Daniel , Neul Jeffrey , Percy Alan , Benke Timothy 
Published: September 2020

BackgroundRett syndrome (RTT) is a severe, progressive neurodevelopmental disorder with multisystem comorbidities that evolve across a patient’s lifespan requiring attentive coordination of subspecialty care by primary care providers. A comprehensive, up-to-date synthesis of medical comorbidities in RTT would aid care coordination and anticipatory guidance efforts by healthcare providers. Our objective was to review and summarise published evidence regarding prevalence of RTT medical comorbidities across all relevant organ systems.MethodsSearch of PubMed from January 2000 to July 2019 was performed using the search terms (Rett and MECP2 AND patient) OR (Rett and MECP2 AND cohort). Articles reporting the prevalence of clinical findings in RTT were assessed with respect to the size and nature of the cohorts interrogated and their relevance to clinical care.ResultsAfter review of over 800 records, the multisystem comorbidities of RTT were summarised quantitatively from 18 records comprising both retrospective and prospective cohorts (31–983 subjects). Neurological comorbidities had the highest prevalence, occurring in nearly all individuals with gastrointestinal and orthopaedic concerns almost as prevalent as neurological. With the exception of low bone mineral content which was relatively common, endocrine comorbidities were seen in only around one-third of patients. Although more prevalent compared with the general population, cardiac conduction abnormalities were the least common comorbidity in RTT.ConclusionsEffective care coordination for RTT requires knowledge of and attention to multiple comorbidities across multiple unrelated organ systems. Many issues common to RTT can potentially be managed by a primary care provider but the need for sub-specialist referral can be anticipated. Since the median life expectancy extends into the sixth decade with evolving subspecialty requirements throughout this time, paediatric providers may be tasked with continued coordination of these comorbidities or transitioning to adult medicine and specialists with experience managing individuals with complex medical needs.
Traversable wormholes in the bulge of Milky Way galaxy with Global Monopole Charge
Authors: Sarkar Susmita , Sarkar Nayan , Rahaman Farook 
Published: September 2020

AbstractThe present work looks for the existence of completely new wormhole geometries in the bulge of the Milky Way galaxy (MWG) situated on the dark matter (DM) density profile followed from MacMillan (MNRAS 76:465, 2017) and Boshkayev and Malafarina (MNRAS 484:3325, 2019) concerned with Global Monopole Charge. The obtained shape function is positively increasing against the radial coordinate and it increases faster with the increasing values of Global Monopole Charge. Moreover, the reported shape function satisfies all the essential criterions and hence it constructs wormhole geometry in the bulge of the MWG. Further, the DM candidate around bulge is suitable to harbor wormhole by violating the null energy condition(NEC) corresponding to three different redshift functions. The striking point of our solution is that for zero Global Monopole Charge the wormholes are asymptotically flat corresponding to the first two choices of redshift functions while for positive values of Global Monopole Charge wormhole becomes non asymptotically flat and Global Monopole Charge also has the crucial effect on the violation of NEC. In our solutions, one can note that the total amount of averaged NEC violating matter in the wormhole spacetime depends on the Global Monopole Charge $$\eta $$
η
. Furthermore, the respective wormhole solutions are in equilibrium positions.
The interaction of glueball and heavy-light flavoured meson in holographic QCD
Authors: Li Si-wen 
Published: September 2020

AbstractWe construct the D4/D8 brane configuration in the Witten–Sakai–Sugimoto model by introducing a pair of heavy flavour brane with a heavy-light open string. The multiplets created by the heavy-light string acquire mass due to the finite separation of the heavy and light flavour branes thus they could be identified as the heavy-light meson fields in this model. On the other hand the glueball field is identified as the gravitational fluctuations carried by the close string in the bulk, so this model is able to describe the interaction of glueball and heavy-light meson through the open-close string interaction in gauge-gravity duality. We explicitly derive the effective action for the various glueballs and heavy-light mesons then numerically evaluate the associated lowest coupling constants. Afterwards the decay/production widths of various glueballs involving the lowest heavy-light meson, which is identified as $$D^{0}$$

D
0

meson, are calculated by using our effective action which might be remarkable to theoretically study the charm oscillation e.g. $$D^{0}-{\bar{D}}^{0}$$

D
0

-

D

¯

0

, $$B_{s}-{\bar{B}}_{s}$$

B
s

-

B

¯

s

decay/production in hadron physics. This work extends the previous investigations of glueball in holographic QCD and it is also a further prediction of glueball-meson interaction.
Eternal inflation, entropy bounds and the swampland
Authors: Wang Ziwei , Brandenberger Robert , Heisenberg Lavinia 
Published: September 2020

AbstractIt has been suggested that low energy effective field theories should satisfy given conditions in order to be successfully embedded into string theory. In the case of a single canonically normalized scalar field this translates into conditions on its potential and the derivatives thereof. In this Letter we revisit small field hilltop models of eternal inflation including stochastic effects and study the compatibility of the swampland constraints with entropy considerations. We show that these stochastic inflation scenarios either violate entropy bounds or the swampland criterion on the slope of the scalar field potential. Furthermore, we illustrate that such models are faced with a graceful exit problem: any patch of space which exits the region of eternal inflation is either not large enough to explain the isotropy of the cosmic microwave background, or has a spectrum of fluctuations with an unacceptably large red tilt.
High-voltage DC converter for solar power station
Authors: Qawaqzeh Mohamed , Zaitsev Roman , Miroshnyk Oleksandr , Kirichenko Mykhailo , Danylchenko Dmytro , Zaitseva Liliia 
Published: September 2020

In the article the circuit design solution of DC-DC regulated resonant converter has been proposed for using with hybrid photovoltaic modules which has cooling equipment and solar concentrators in order to maximize electric power generating by such module. By using computer simulation based on multiple iterations algorithm we significantly increase the accuracy of determining the resonance circuit optimal parameters for build up DC–DC converters to work in a wide range of electric powers. Based on optimal values of the resonance LLC scheme parameters, achived by numerical calculation it can be show high values of electrical energy transformation efficiency for photovoltaic energy station equipped with high efficiency hybrid photovoltaic modules. Implementation of microprocessor-based control into design of DC–DC back-boost converters create a new possibility to build control algorithms for increase reliability and conversion efficiency, rapid and precision stabilization of maximum power point, implementation network monitoring of photovoltaic modules, converters itself and the whole photovoltaic station parameters.
The identity of the freshwater crab Indochinamon manipurense (Alcock, 1909), with description of a new species of Potamiscus Alcock, 1909, from Manipur State, India (Decapoda, Brachyura, Potamidae)
Authors: Pati Sameer K. , Mitra Santanu , Ng Peter K. L. 
Published: September 2020

Abstract
The identity of the potamid freshwater crab, Indochinamon manipurense (Alcock, 1909) from the state of Manipur in northeast India, is clarified based on an examination of the type specimens. The species is redescribed and a lectotype designated. Specimens from the same region previously referred to this species were compared to the types of I. manipurense and shown to belong to a new species of Potamiscus Alcock, 1909, instead. The new species, Potamiscus takedai sp. nov., can easily be separated from I. manipurense by the characters in the carapace, third maxilliped, male pleon, male gonopods, and female vulvae. Potamiscus takedai sp. nov. can be differentiated from congeners mainly by the strongly bent terminal segment of the male first gonopod and a relatively shorter distal segment of the male second gonopod.
The synonymy of Parasesarma foresti (Rahayu & Davie, 2002) with P. indiarum (Tweedie, 1940) (Decapoda, Brachyura, Sesarmidae)
Authors: Shahdadi Adnan , Davie Peter J. F. , Rahayu Dwi Listyo , Schubart Christoph D. 
Published: September 2020

Abstract
Two Southeast Asian species of Parasesarma De Man, 1895, P. indiarum (Tweedie, 1940) and P. foresti (Rahayu & Davie, 2002), have been reported to be morphologically and genetically very similar. Present comparisons of a range of material show the two species to be identical in male chelar dactylar tuberculation, pleon, and first gonopod characters, all typically used to separate close sibling species in this genus. CO1 genetic distances between the two putative species are also too low to be regarded as interspecific. Parasesarma foresti is thus here regarded as a junior subjective synonym of P. indiarum.