bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hepatic Liquoric Cyst as a Complication of Ventriculoperitoneal Shunt Insertion: A Case Report
Authors: Macêdo Lívio Pereira de , Ugulino Netto Arlindo , Franke Kauê , Eugenio Pierre Vansant Oliveira , Freitas Lucas Ribeiro de Moraes , Leone Davi Coutinho Marcelino Guerra , Oliveira Diego Pereira de Melo , Carvalho Júnior Eduardo Vieira de , Faquini Igor Vilela , Almeida Nivaldo S. , Azevedo-Filho Hildo Rocha Cirne 
Published: August 2021

Abstract
Background The ventriculoperitoneal shunt (VPS) procedure is still the most used technique for management of hydrocephalus. This article reports a case of hepatic cerebrospinal fluid (CSF) pseudocyst as a rare, but important, complication of the VPS insertion.
Case Description An 18-year-old male presented to the hospital complaining of temporal headache and visual turbidity for approximately 3 months with a history of VPS insertion for treatment of hydrocephalus and revision of the valve in adolescence. The diagnosis was based on abdominal imaging, demonstrating an extra-axial hepatic CSF pseudocyst free from infection. Following the diagnosis, the management of the case consisted in the removal and repositioning of the catheter on the opposite site of the peritoneum.
Conclusion The hepatic CSF pseudocyst is an infrequent complication of VPS procedure, but it needs to be considered when performing the first evaluation of the patient. Several techniques are considered efficient for the management of this condition, the choice must be made based on the variables of each individual case.
Videolaryngoscopy Findings of the Vocal Health Program in Dysphonic Teachers in the Federal District, Brazil
Authors: Granjeiro Ronaldo Campos , Oliveira Lorena Cássia de Carvalho , Dias Mirela Alves , Oliveira Cristiane Ferraz de , Oliveira Glauce Mara Gomes Ferreira 
Published: August 2021

Abstract
Introduction The high phonatory demand required of teachers is a direct cause of the onset of vocal symptoms and of the development of laryngeal disorders.
Objective To describe the findings of the laryngeal screening performed as part of the Vocal Health Program held in the Federal Distrcit of Brazil in 2014 and 2015.
Methods The study was performed with 361 dysphonic teachers from public schools who attended the laryngeal screening (videolaryngoscopy) part of the program. Data on anamnesis, the degree of dysphonia, the findings of the laryngeal screening, the referrals made after the laryngeal screening, and the result of the assessment of vocal aptitude for work were analyzed from the forms of each participating teacher.
Results The sample of the present study (N = 361) represents 18.23% of the 1,980 teachers that went through the vocal screening of the program in 2014 and 2015. In total, 98 (27.15%) teachers presented mild dysphonia, 221 (61.22%), moderate dysphonia, and 42, (11.63%) severe dysphonia. Regarding the laryngeal screening (videolaryngoscopy exam), 269 teachers (74.52%) presented laryngeal disorders, and the main ones found were vocal nodules (43.87%), signs of laryngopharyngeal reflux (37.17%), hourglass chink (18.22%), vascular dysgenesis (18.22%), midposterior triangular chink (9.67%), and double chink (8.55%).
Conclusion Laryngeal screening through videolaryngoscopy and auditory-perceptual screening of the voice as part of vocal health programs are essential to define the diagnosis and therapeutic conduct for teachers with dysphonia. Together with intervention activities, continuing education and adequate and accessible treatment, the periodic evaluation of vocal health can contribute to reduce absenteeism and improve the quality of life and of the voice of teachers.
Infrared spectroscopy of carbocations upon electron ionization of ethylene in helium nanodroplets
Authors: Erukala Swetha , Feinberg Alexandra , Singh Amandeep , Vilesov Andrey F. 
Published: August 2021

The electron impact ionization of helium droplets doped with ethylene molecules and clusters yields diverse CXHY+ cations embedded in the droplets. The ionization primarily produces C2H2+, C2H3+, C2H4+, and CH2+, whereas larger carbocations are produced upon the reactions of the primary ions with ethylene molecules. The vibrational excitation of the cations leads to the release of bare cations and cations with a few helium atoms attached. The laser excitation spectra of the embedded cations show well resolved vibrational bands with a few wavenumber widths—an order of magnitude less than those previously obtained in solid matrices or molecular beams by tagging techniques. Comparison with the previous studies of free and tagged CH2+, CH3+, C2H2+, C2H3+, and C2H4+ cations shows that the helium matrix typically introduces a shift in the vibrational frequencies of less than about 20 cm−1, enabling direct comparisons with the results of quantum chemical calculations for structure determination. This work demonstrates a facile technique for the production and spectroscopic study of diverse carbocations, which act as important intermediates in gas and condensed phases.
Global patterns of raptor distribution and protected areas optimal selection to reduce the extinction crises
Authors: Cruz Carlos , Santulli-Sanzo Giulia , Ceballos Gerardo 
Published: August 2021

SignificanceCurrent extinction rates are caused by human activities, including habitat destruction. Here we analyze the global patterns of raptor distribution to determine priority areas for conservation. Raptors are top predators that can be used as umbrella species to help the conservation of other species. Our results provide insights into global strategies for conservation of different proportions of the geographic range of raptor species, minimizing socioeconomic conflict. These findings are fundamental to guide conservation actions that may help avert the massive current extinction crises.
PPAR-γ activation enhances myelination and neurological recovery in premature rabbits with intraventricular hemorrhage
Authors: Krishna Sunil , Cheng Bokun , Sharma Deep R. , Yadav Sunita , Stempinski Erin S. , Mamtani Sahil , Shah Elisa , Deo Anjali , Acherjee Trishna , Thomas Teena , Zhang Xusheng , Zhang Jinghang , Iacobas Dumitru A. , Ballabh Praveen 
Published: August 2021

Significance
Intraventricular hemorrhage (IVH) is the most common neurological disorder of premature infants and remains a major cause of white matter injury in the survivors. No therapeutic strategy exists to prevent IVH-induced hypomyelination and cerebral palsy in these infants. We showed that pharmacological or genetic activation of peroxisome proliferator activated receptor-γ (PPAR-γ) ameliorated inflammation, oligodendrocyte progenitor cell (OPC) maturation, myelination, and motor function in rabbit kits with IVH. PPAR-γ activation also promoted microglial phagocytosis but did not reduce hydrocephalus. Transcriptomic analyses identified previously unrecognized PPAR-γ–induced genes in the isolated OPCs and microglia, which would reprogram these cells toward reducing inflammation and promoting myelination. The study highlights PPAR-γ–induced reversal of white matter injury in premature newborns with IVH and the underlying mechanisms.
Magnetic properties of the composition of nanocrystals and amorphous matrix in an alloy of the Fe-Nb-Si-B-Cu system
Authors: Golovachev E A , Pakhomova S A 
Published: August 2021

Abstract
It is shown that amorphous alloys of the Fe-Nb-Si-B-Cu system are practically not used as soft-magnetic materials in the initial (freshly quenching) state. It is proposed to perform post-quenching annealing of products to improve the soft-magnetic properties. Annealing modes, which remove winding and quenching stresses are studied. Is established the optimal annealing mode, in which a favorable structure is formed. It is an amorphous alloy-nanocrystal composition. This composition can significantly increase the magnetic permeability, reduce the coercive force and the loss of magnetization reversal. This treatment will provide optimal performance characteristics for the amorphous alloy used. The paper studies and compares the magnetic properties of the amorphous alloy-nanocrystal composition obtained at different annealing temperatures. It is shown that the most significant comparison is the dependence of the magnetic induction B (Tl) by the magnetic field strength H (A/m).
Study of structure and properties of multilayer materials based on titanium alloys
Authors: Plokhikh A I , Putirskiy S V , Wang Tao 
Published: August 2021

Abstracts
The article presents the results of the study of the structure and properties of multilayer materials based on titanium alloys of various classes. The selection of initial compositions founded upon the approach previously tested in the development of multilayer materials based on steels is presented. The basic possibility of forming a laminar structure in titanium multilayer materials has been shown. Based on the analysis of the microstructure, especially the interlayer boundaries, the starting composition that is most suitable for this purpose has been proposed. In reliance upon the conducted tensile tests, it was established that multilayer materials based on titanium alloys have a complex of mechanical properties characteristic of this class of materials. The impact hardness tests performed, as well as the subsequent fractographic studies, allowed concluding about the effect of the condition of the interlayer boundary on the increase in the resistance of the material to dynamic fracture.
Bitumen-polymer compositions for asphalt concrete
Authors: Fedorova L V , Tretyakova Z O , Voronina M V 
Published: August 2021

Annotation
One of the criteria for the level of development of countries is the condition of the road network. At present, the transport and operational characteristics of the majority of domestic highways lag behind the world level. Therefore, the need to create road surfaces with increased durability is very urgent. As a result of this research bitumen modified with polymers have been investigated. Based on measurements of time-dependent viscosity parameters (melting temperature, penetration and spin-spin relaxation time T2), it was found that at a thiol content of more than 25%, a continuous phase can form, which manifests itself as a sharp change in the properties of bitumen and is associated with phase inversion. A good compatibility of thermoplastic elastomers with a bituminous binder was revealed, and the resulting modified systems have high technical characteristics The proposed method for modifying bitumen can be recommended for obtaining roofing materials.
Investigation of the thermal characteristics of a metal-anisotropic composite contact pair
Authors: Talalaeva P , Bykov L , Ezhov A 
Published: August 2021

Abstract
The tendency to use various composite materials in the production of aircraft components and assemblies determines the relevance of the study of the anisotropic properties of these materials. Ceramic-matrix composites used in aviation rocket and space technology can be assigned certain anisotropic properties already at the production stage. The anisotropy of the material has a significant effect on the thermal characteristics of metal - ceramic-matrix composite contact pairs. This paper presents the results of numerical modelling of the thermal properties of contact interaction with the participation of an anisotropic ceramic matrix composite. It is shown that a change in the orientation of the fibers of the composite matrix with respect to the direction of the heat flux significantly changes the contact thermal resistance.
Numerical estimation of in-service damages’ effect on the load-bearing capacity of composite aircraft structures elements
Authors: Limonin M V , Dudarkov Y I , Levchenko E A 
Published: August 2021

AnnotationOne of the main problem on the way to the effective integration of polymer composite materials in aircrafts’ primary structures is the high sensitivity to various defects and damages. The main task in design is to create a composite aircraft structure such that any possible damage (defect) does not lead to a decrease in its load-bearing capacity below the limited load level. As a rule, in practice, this problem is solved by performing a large number of tests. The introduction of a “Building Block” approach based on modern numerical methods will reduce the required number of tests. In this paper, we consider the nonlinear numerical analysis to estimate the residual load-bearing capacity of a composite structure. It allows taking into account different progressive failure processes and their interaction within a single model. On an example of the composite panel with a “cut” it is shown that this method results in a sufficiently accurate residual strength prediction. However, due to its complexity, it is unsuitable at the early stages of design development. For this task, we developed a simplified numerical analysis method. The obtained results validated by comparison with the available test data and with more detailed nonlinear analysis.
Dependence of failure envelope on strain rate for unidirectional CFRP
Authors: Liu Hao , Dumansky A M , Alimov M A 
Published: August 2021

Abstracts
A unidirectional carbon/epoxy composite was taken as the research subject for analysis of its strength with strain-rate effect. The theory can be further adapted and extended to the prediction of failure and progressive damage of unidirectional laminae under static and dynamic loadings. The significance of this theory is that it simplifies the formula of failure theory and may improve the prediction accuracy.
Study of the winding methods influence on the aramid fibers impregnation degree for high-pressure pipes manufacturing
Authors: Novikov A D , Ignatov P I , Lubyanskiy A O , Morozov S A 
Published: August 2021

Abstract
The purpose of this work is to compare the impregnation degree of samples made from an aramid-polyurethane composite material produced by three methods of winding. The para-aramid impregnation degree assessment was made on the basis of a microscopic examination of a sample’s section, as well as the results of determining the delamination fracture toughness of ring samples. Based on the studies, it was concluded that the best impregnation degree for para-aramid fibers is achieved in case of using binder sputtering assisted dry winding technology. This technology can be used for high-pressure flexible pipes manufacturing to increase their strength, which can lead to the product’s working pressure increasing.
Application of the friction surfacing process for the production of functional gradient layered composition
Authors: Mikheev R S 
Published: August 2021

Abstract
The possibility of applying the friction surfacing process for the production of functional gradient layered compositions for tribotechnical purposes has been considered. The influence of technological parameters of the friction surfacing process: the rod rotation frequency, the longitudinal linear speed of the rod movement and the method of the substrate surface preparation on the deposited layer formation has been shown.
Modeling basalt fibers wetting processes used in the basalt rebar production
Authors: Orlov M A , Nelyub V A , Kalinnikov A N , Borodulin A S 
Published: August 2021

Abstract
The article presents the results of experimental and analytical study of basalt fibers wetting processes with epoxy binders, carried out to improve the quality of basalt rebar. It is revealed that the obtained model of basalt fiber impregnation allows determining the parameters of the binder flow in the porous structure of the monofilament bundle. Numerical results of evaluation of basalt fibers wetting with epoxy binders are presented and their rheological properties are determined.
New effective lubricants for continuous basalt fibers
Authors: Sokolov G S , Shakirov K M , Nelyub V A 
Published: August 2021

Abstracts
Trends in the production of new lubricants compositions for basalt and glass fibers are presented. The results of purposeful development of lubricants recipes for basalt fibers that provide high adhesive strength with the epoxy binder, minimal damage during winding and subsequent processing into technical fabrics are given.
Modeling of thermal stresses in thin-walled composite structures with phase transformation
Authors: Dimitrienko Yu I , Sborschikov S V , Egoleva E S , Yakovlev D O 
Published: August 2021

Abstract
An asymptotic theory modified version for calculating thin elastic multilayer plates made of high-temperature composites with multistage phase transformations, considering the composites shear characteristics finite values has been developed. Proposed in this work method version does not contain any assumptions about the kind of the unknown functions and allows ones to find all 6 stress tensor components while ensuring the high mathematical accuracy that symbolic for asymptotic method. Using the developed model, it became possible to calculate temperature non-stationary field and thermal stresses in thin multilayer plates of fabric composite materials on an inorganic binder. For material properties calculation were used multiscale averaging method and finite element modeling for periodical cells. Some change stresses numerical simulation results for composite plate during heating and loading are given.
Optimization of the curing modes of three-layer honeycomb panels
Authors: Yanyang Chen , Malysheva G V 
Published: August 2021

Abstract
In this paper, a method of determining rational regimes of the process of curing structures made of polymer composite materials and honeycomb filler was developed. The subject of the study was a three-layer panel where the top and bottom layers were made from carbon fiber, while the honeycomb filler was made from aluminum foil. The filler was bonded to the top and bottom layers with epoxy film adhesive. Using numerical simulation, temperature state, curing degree, and heat generation rate of all the elements of the three-layer panel were determined. The simulations revealed that the process of curing the considered honeycomb structure was uneven due to uneven temperature distribution. The optimal process modes ensuring the gradients of the degree of cure were established.
Baseline Test Suite Construction of Smoke Test for Extreme Programming
Authors: Tanli Mengqing , Zhang Ying , Jiang Yan , Wang Yulin 
Published: August 2021

Abstract
This paper proposed an approach of construction of baseline test suite in smoke test for extreme programming. According to our investigation, the baseline test suite should firstly embody the thinking of “data-centerlization”, and the baseline test suite in smoke test should be conducted in terms of the true application scheme, so this baseline test suite should be the calibration marking for testing and verification of a baseline product version. As a typical example, in the procedure of construction in smoke test of Product Quality Monitoring Software, data accuracy, kinds of control chart, data range, typical application situation, and further requirement were taken into consideration. In order to improve the testing efficiency and to avoid mistakes, a loading kit was developed.
Guided and unguided de-escalation from potent P2Y12 inhibitors among patients with acute coronary syndrome: a meta-analysis
Authors: Tavenier Anne H , Mehran Roxana , Chiarito Mauro , Cao Davide , Pivato Carlo A , Nicolas Johny , Beerkens Frans , Nardin Matteo , Sartori Samantha , Baber Usman , Angiolillo Dominick J , Capodanno Davide , Valgimigli Marco , Hermanides Renicus S , van ‘t Hof Arnoud W J , ten Berg Jur M , Chang Kiyuk , Kini Annapoorna S , Sharma Samin K , Dangas George 
Published: August 2021

Abstract

Aim
Optimal dual antiplatelet therapy (DAPT) in patients undergoing percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS) intends to balance ischemic and bleeding risks. Various DAPT de-escalation strategies, defined as switching from a full-dose potent to a reduced dose or less potent P2Y12 inhibitor, have been evaluated in several ACS-PCI trials. We aimed to compare DAPT de-escalation to standard DAPT with full-dose potent P2Y12 inhibitors in ACS patients who underwent PCI.

Methods and results
PubMed, Google Scholar, and Cochrane Central Register of Controlled Trials were searched for eligible randomized controlled trials. Aspirin monotherapy trials were excluded. Five randomized trials (n = 10 779 patients) that assigned DAPT de-escalation (genetically guided to clopidogrel n = 1242; platelet function guided to clopidogrel n = 1304; unguided to clopidogrel n = 1672; unguided to lower dose n = 1170) vs. standard DAPT (control group n = 5391) were included in this analysis. DAPT de-escalation was associated with a significant reduction in Bleeding Academic Research Consortium ≥2 bleeding (HR 0.57, 95% CI 0.42–0.78; I2 = 77%) as well as major adverse cardiac events, represented in most trials by the composite of cardiovascular mortality, myocardial infarction, stent thrombosis, and stroke (HR 0.77, 95% CI 0.62–0.96; I2 = 0%). Notwithstanding the limited power, consistency was noted across various de-escalation strategies.

Conclusion
De-escalation of DAPT after PCI for ACS, both unguided and guided by genetic or platelet function testing (PFT), was associated with lower rates of clinically relevant bleeding and ischemic events as compared to standard DAPT with potent P2Y12 inhibitors based on five open-label RCTs reviewed.
Recent trend, biases and limitations of cultivation-based diversity studies of microbes
Authors: Prakash Om , Parmar Mrinalini , Vaijanapurkar Manali , Rale Vinay , Shouche Yogesh S 
Published: August 2021

AbstractThe current study attempts to analyze recent trends, biases and limitations of cultivation-based microbial diversity studies based on published, novel species in the past 6 years in the International Journal of Systematic and Evolutionary Microbiology (IJSEM), an official publication of the International Committee on Systematics of Prokaryotes (ICSP) and the Bacteriology and Applied Microbiology (BAM) Division of the International Union of Microbiological Societies (IUMS). IJSEM deals with taxa that have validly published names under the International Code of Nomenclature of Prokaryotes (ICNP). All the relevant publications from the last 6 years were retrieved, sorted and analyzed to get the answers to What is the current rate of novel species description? Which country has contributed substantially and which phyla represented better in culturable diversity studies? What are the current limitations? Published data for the past 6 years indicate that 500–900 novel species are reported annually. China, Korea, Germany, UK, India and the USA are at the forefront while contributions from other nations are meager. Despite the recent development in culturomics tools the dominance of Proteobacteria, Bacteroidetes and Actinobacteria are still prevalent in cultivation, while the representation of archaea, obligate anaerobes, microaerophiles, synergistic symbionts, aerotolerant and other fastidious microbes is poor. Single strain-based taxonomic descriptions prevail and emphasis on objective-based cultivation for biotechnological and environmental significance is not yet conspicuous.