bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flow-induced Vibrations of a Horizontal Elastic Band Plate Submerged in Fluid of Finite Depth
Authors: Szmidt Kazimierz , Hedzielski Benedykt 
Published: August 2020

Abstract
The paper deals with forced vibrations of a horizontal thin elastic plate submerged in a semi-infinite layer of fluid of constant depth. The pressure load on this plate is induced by water waves arriving at the plate. This load is accompanied by pressure resulting from the motion of the plate. The plate and fluid motions depend on boundary conditions, and, in particular, the pressure load depends on the width of the gap between the plate and the bottom. In theoretical description of the phenomenon, we deal with a coupled problem of hydrodynamics in which the plate and fluid motions are coupled through boundary conditions at the plate surfaces. The main attention is focused on transient solutions of the problem, which correspond to fluid (and plate) motion starting from rest. In formulation of this problem, a linear theory of small deflections of the plate is employed. In order to calculate the fluid pressure, a solution of Laplace’s equation is constructed in a doubly connected fluid domain. With respect to the initial value problem considered, we confine our attention to a finite fluid domain. For a finite elapse of time, measured from the starting point, the solution in the finite fluid area mimics a solution within an infinite domain, inherent for wave propagation problems. Because of the complicated structure of boundary conditions of the coupled problem considered, the fluid domain is divided into sub-domains of simple geometry, and the solutions of the problem equations are constructed separately in each of these domains. Numerical experiments have been conducted to illustrate the formulation developed in this paper.
Primary care pediatricians’ use of specialty referrals in treating children with chronic abdominal pain
Authors: Memarian Shadman , Pawlowski Callie , Tumin Dmitry , Jose Folashade A. , Jamison Shaundreal D. 
Published: August 2020

Abstract

Objectives
Pediatric chronic abdominal pain (CAP) is typically managed in primary care settings, although specialty referrals may help patients access the full range of biopsychosocial treatment options. We investigated patterns of specialty referral (gastroenterology or mental health) among children with CAP seen in an academic pediatric primary care clinic.

Methods
We retrospectively identified patients age 4–17 years visiting our primary care clinic in 2016–2017 for abdominal pain, identified using International Classification of Diseases (ICD) codes. We excluded patients whose symptoms did not persist for 3 months or who were referred to a specialist before their symptoms had persisted for 3 months. Referral outcomes were assessed through December 2018.

Results
Of 320 patients with qualifying ICD codes, 253 were excluded because their symptoms did not persist for 3 months; 31 had already been referred to a specialist within 3 months of pain onset; and one chart could not be accessed. Of the remaining 34 patients (22/12 girls/boys, median age 10 years) 10 (29%) were referred to a gastroenterologist and none were referred to mental health specialists. No clinical or demographic factors reached statistically significant associations with gastroenterology referral, although pain duration was shorter among patients who were referred.

Conclusions
Children with CAP managed in our primary care clinic were seldom referred to specialists after their pain persisted over 3 months. Increasing focus on cognitive-behavioral therapies for chronic pain, and the low specialty referral rate, indicates that primary care practices should be prepared to offer these treatment modalities to children with CAP.
A new method of flow blockage collapsing in the horizontal pipe: the pipe-rotation mechanism
Authors: Feng Shaohua , Jia Wenguang , Yan Jinglu , Wang Chuanwei , Zhang Kerui 
Published: August 2020

AbstractIn dense pneumatic conveying, flow blockage is a severe problem in the horizontal pipe, so accelerating the collapse velocity of blockage can improve the efficiency of powder transportation. In this paper, we offered a new method of the pipe-rotation mechanism and focused on the effect of this method on blockage collapse from collapse velocity, mass flow rate, and the change of the particle region. The physical model developed is horizontal pipe-rotation geometry at a uniform rotational speed of 0, 150, 300, 450, and 600 rpm, respectively. Then we used a computational fluid dynamics and discrete element method (CFD-DEM) model to investigate a single slug of particles passing through these geometries. The results show that collapse velocity and the mass flow rate increase with increasing rotational speed, which proves that the pipe-rotation mechanism can accelerate the collapse of flow blockage evidently. Moreover, the pipe-rotation mechanism changes the particle region significantly, which is polarized in the lower half of the pipe. It is trusted that the findings reported in this paper well serve as a helping source for further studies toward dense pneumatic conveying.
Love, sadness and other mental states in the Middle Welsh Owain (and related texts)
Authors: Poppe Erich 
Published: August 2020

Abstract
This article explores the devices employed by the medieval Welsh narrator of Owain, or Chwedyl Iarlles y Ffynnawn (‘The Story of the Lady of the Well’), to convey emotions and the mental states of his characters to his audiences. Although he generally remains inaudible, he uses, at some crucial points, words and phrases denoting emotions in a narrow sense, such as love, sadness and shame, in order to direct and steer the audiences’ perception and their understanding of the narrative. A comparison with thematically related texts, Chrétien de Troyes’ Yvain, and its Old Norse, Old Swedish and Middle English translations, helps to assess the narrative role of literary emotions in the Welsh text.
‘He ne wiste nother of evyll ne gude’: A Prelapsarian Perceval
Authors: Hafner Susanne 
Published: August 2020

Abstract
Departing from the observation that the Middle English romance of Sir Perceval of Galles quotes from Genesis at two crucial moments, this study provides a coherent reading of the text, explaining some of its idiosyncrasies and triangulating it with the versions of Chrétien de Troyes and Wolfram von Eschenbach. What distinguishes the Middle English version from the continental texts are its purposeful absences, i. e. that which the author chooses to abbreviate or leave out altogether. The result is the story of a prelapsarian creature who stumbles through an Edenic landscape where time and mortality have been suspended and individual culpability does not exist. Sir Perceval’s non-existent biblical knowledge, blocked by his mother and ultimately brought to its end by a literal fall from his horse, leaves him invincible, ungendered and immortal. It also serves to explain his unapologetic violence as well as his complete lack of sexual desire. This bold experiment cannot last – Sir Perceval does eventually discover knighthood, masculinity and mortality. Unfortunately, these three are inseparably linked: being a knight, being a man and being dead are one and the same thing in Sir Perceval’s universe.
Hybrid Identity and the Morte Darthur’s Lady of the Lake
Authors: Myers Maggie Rebecca 
Published: August 2020

Abstract
This article examines Nynive, the second Lady of the Lake, in Malory’s Morte Darthur. It reads her in a hybrid context, arguing that her hybridity allows her to occupy a unique position within the Morte. This position goes beyond her roles in the Vulgate and situates her as a defender of Arthur’s court and a dispenser of justice within it. In turn, understanding Nynive’s hybridity allows us to understand how she finds and claims power in the Morte through assisting the court, upholding it from a positionality that is unique to her.
Integer factoring and compositeness witnesses
Authors: Pomykała Jacek , Radziejewski Maciej 
Published: August 2020

AbstractWe describe a reduction of the problem of factorization of integers n ≤ x in polynomial-time (log x)M+O(1) to computing Euler’s totient function, with exceptions of at most xO(1/M) composite integers that cannot be factored at all, and at most x exp $\begin{array}{}
\displaystyle
\left(-\frac{c_M(\log\log x)^3}{(\log\log\log x)^2}\right)
\end{array}$ integers that cannot be factored completely. The problem of factoring square-free integers n is similarly reduced to that of computing a multiple D of ϕ(n), where D ≪ exp((log x)O(1)), with the exception of at most xO(1/M) integers that cannot be factored at all, in particular O(x1/M) integers of the form n = pq that cannot be factored.
Analysis on dynamic feature of cross arm light weighting for photovoltaic panel cleaning device in power station based on power correlation
Authors: Hou Yuqing , Fu Yu , Chen Jiawei 
Published: August 2020

AbstractThe surface cleanliness of photovoltaic (PV) panel has an important impact on the efficiency of power generation. The excessive mass of cross arm has always affected the use of cleaning device. Based on the power correlation analysis, the dynamic characteristics of cross arm lightweight of PV panel cleaning device in the power station are proposed. Using the theory of information fusion to weigh it as a comprehensive influence factor, the power prediction value of the model output is transmitted to the cleaning device in real time: design the cleaning device of PV panel and optimize the topology of the mechanical cross arm. The experimental results show that the PV power is related to many meteorological factors, and the lightweight design of the cross arm is more conducive to the natural frequency and mode shape analysis of each mode of the cross arm structure.
Influence of unequal stator tooth width on the performance of outer-rotor permanent magnet machines
Authors: Wang Aimeng , Li Dashuang 
Published: August 2020

AbstractOuter-rotor permanent magnet machines for low-speed and high-torque applications have been used due to their high moment of inertia and torque density. In this paper, the 12-slot/10-pole outer-rotor fractional-slot permanent magnet machine model is established by finite element analysis, the influence of unequal stator tooth width and tooth tip width is investigated for the PM machine, and five different schemes of stator tooth and tip width are designed and analyzed. Detailed comparisons of the performance characteristics of the machines are presented including important issues such as output torque, magnetic field distribution, and tooth flux density. It is shown that the torque density and cogging torque and efficiency can be effectively improved by choosing reasonable tooth and tip width, which lays a foundation for further optimum design and efficiency improvement of the machine.
T Dependence of the Mechanical Properties on the Microstructural Parameters of WC-Co
Authors: Emanuelli L. , Molinari A. , Arrighetti G. , Garoli G. 
Published: August 2020

Abstract
The effect of binder content and WC grain size on the mechanical properties is widely investigated in literature. An increase in binder amount and WC grain size leads to a decrease in hardness and an increase in fracture toughness. Actually, these correlations are related to the influence of binder content and WC grain size through the contiguity and mean binder free path, which are the microstructural parameters that affect the mechanical properties. The aim of this study is to verify the dependence of the two microstructural parameters that govern the WCCo mechanical behaviour, namely the contiguity and mean binder free path, on the mechanical properties of an extended range of WC-Co samples, which differ in terms of Co content and tungsten carbide grain size.
O signo linguístico entre Saussure e Benveniste: ainda de sua natureza “arbitrária” e “necessária” e sua relação com o sujeito falante/locutor
Authors: Teixeira da Silva Filho Jomson 
Published: August 2020

A arbitrariedade do signo se configurou como um afastamento de Benveniste em relação a Saussure, ou uma ultrapassagem daquele em relação a este, ao propor a relação necessária entre os constituintes do signo linguístico. Neste artigo, questionamos essa ultrapassagem especialmente no que tange ao sujeito na teorização saussuriana como aquilo que o próprio Curso de Linguística Geral (1916) projetou para a ciência linguística futura e um princípio que foi aplicado por Benveniste em sua teorização sobre a linguagem. Argumentamos sobre a noção de sujeito em Saussure, e ainda, sobre a interpretação de Benveniste (1976[1939]) do signo através daquilo que foi possível ao autor ter acesso dos textos saussurianos, como destaca Normand (2009). Assim, não defendemos que Benveniste ultrapassa Saussure ao propor as duas dimensões da linguagem, semiótica e semântica, mas que Benveniste soube “ler” Saussure, tomando-o como “em primeiro lugar e sempre o homem dos fundamentos” (BENVENISTE, 1976, p. 35).
AGE-RELATED LEFT VENTRICLE MYOCARDIAL REMODELING: IS THERE A LINK WITH NORMAL AGEING?
Authors: Plokhova E. V. , Akasheva D. U. , Tkacheva O. N. , Strazhesko I. D. , Dudinskaya E. N. , Kruglikova A. S. , Agaltsov M. V. , Pykhtina V. S. , Sharashkina N. V. , Brailova N. V. , Skvortsov D. A. , Boytsov S. A. 
Published: August 2020

Aim. To study the age-related changes in structure of myocardium of the left ventricle and their relation with telomere length. With the age even in absence of cardiovascular diseases (CVD) and risk factors (CRF) there is a changing of the left ventricle (LV) myocardium structure. Probable mechanism of the age-related changes is cell ageing. One of the markers of cell ageing is telomere length (TL) that is also a marker of biological age. Material and methods. After screening we included 303 persons at the age 23-91 y.o. without clinical signs of CVD. All participants underwent transthoracal echocardiography by the standard method. Telomere length was measured in leucocytes on the genomic desoxyribonucleic acid (DNA) by real-time polymerase chain reaction method (PCR). We measured the relative length of telomeres. For the assessment of parameters relations we used correlational logistic regression analysis and build-up of multidimensional regression models. Results. Older age group (women >55 years and men >45 years) of those without significant signs of CVD and CRF comparing to the group of younger persons we found thicker LV myocardium and its concentric remodeling. TL was significantly linked with the age (β=-0,012, p=0,0001). Also we found the relation of TL with LV structure parameters: interventricular septum thickness (IVST) (β=-0,028, p=0,01), relative wall thickness (RVT) (β=-0,012, p=0,02) using the age and CRF. However shorter telomeres (<9,75 units) were not related to the increase of IVST (OR=1,44; 95% CI 0,84-2,47; p=0,18), posterior wall thickness (PWT) (OR=1,56; 95% CI 0,37-6,59; p=0,55) and RVT (HR=1,40; 95% CI 0,74-2,65; p=0,31). Conclusion. Left ventricle hypertrophy and its concentric remodeling in older age group without CVD and CRF shall be regarded as age-related. LT, cell ageing marker, is not related to the age-specific changes of LV structure.
Studying Safety Attitude and its Relationship with Safety Performance among the Operational Staff in a Cement Factory in 2018
Authors: Jahani Fereshteh , Mosavian Asl Zeinab , Kouhnavard Bahram , Shamsaddini Shoaib 
Published: August 2020

Background: Risk perception and employees' attitudes towards safety is one of the requirements for establishing safety culture and having a safer working environment. If the attitude of employees to safety can be improved and accomplished, their safety performance will also be improved. So, to achieve an appropriate working environment, it is necessary to measure a person's perception of safety. The current study aims to explore the relationship between attitudes and safety performance among employees of the cement factory in Fars Province in Iran.
Methods: The present study is sectional analytical research, which was conducted among employees of the cement factory in the south of Iran in 2018. The required information was collected through the attitude questionnaire and safety performance. Finally, 130 questionnaires were completed. The data analysis was carried out through the SPSS software version 24 by using Kruskal–Wallis tests and man Whitney tests.
Results: The mean safety attitude was determined by 3.85(0.28). According to the results, there is no significant relationship between the level of safety attitude with age (P=0.32), the degree of education (P=0.36), work experience (P=0.52), accident numbers (P=0.47) and also the education (P=0.320). On the other hand, the safety attitude showed a significant relationship with safety performance (P=0.001).
Conclusion: According to the results of the study and the significant relation between the safety attitude and performance, functional improvements in employee's safety attitudes could be achieved by planning and taking occupational health preventive measures.
Design Of Turbine L On Basin Cylinder Walls With 5cm And 10cm Turbine Distance Various On The Effect Of Electrical Power In The Gravitation Water Vortex Power Plant (GWVPP)
Authors: Hasan Basri Muhammad , Syaifuddin Zuhri Muhammad , Saraviyan Iskawanto Hilman , Indarto Bachtera 
Published: August 2020

The current source of energy tthat is mostly done in research on renewable energy is water flow. In daily life - electrical energy is widely used by everyone, both young and old. But over time this power source will be exhausted due to continuous use. That is because most of the existing electricity sources come from non-renewable sources. So it is therefore necessary to feel that renewable sources are being used to generate electricity. So the idea emerged to examine a type of small type power plant that is the Water Vortex Power Plant (GWVPP) Generator. Here a study was carried out on the effect of the distance of the L model turbine on the cylindrical basin. For the effective of power in the L model turbine with a distance of 5 cm to the cylinder basin wall is able to produce the highest effective power of 2.89 Watt at a height of 10 cm, while the highest effective power of the L model turbine with a distance of 10 cm towards the cylinder basin wall is 0.14 Watt at 10 cm height from the outlet water output. For the potential power of L model turbines with a distance of 5 cm can produce the highest potential power at an altitude of 28 cm with a potential power of 4.61 watts. While the potential power of the L model turbine with a distance of 10 cm can produce 4.02 watts with a height of 10 cm towards the outlet of the water outlet.
Prognostic significance of NDRG2 combined with EGFR-sensitizing mutations in lung adenocarcinoma&nbsp;
Authors: Yang Bo , Ji Linlin , Feng Yiling , Li Xiao-Ping , Zhou Hong-Gang , Jiang Tao , Xiao Ting , Li Xiao-He , Zhang Liang , Xu Hongliang , Wang Guang-Shun , Zhang Wei-Dong 
Published: August 2020

Abstract
Background: N-myc downstream-regulated gene 2 (NDRG2) plays a substantial role in lung adenocarcinoma (LUAD). Epidermal growth factor receptor (EGFR)-sensitizing mutation could significantly improve prognosis in patients with LUAD. Here, we aimed to elucidate the prognostic value of NDRG2 combined with EGFR-sensitizing mutations in patients with LUAD. Methods: Lung parenchyma specimens obtained during surgery or CT-guide percutaneous lung puncture biopsy for the NDRG2 protein and EGFR genomic testing were obtained. Associations between NDRG2/EGFR and clinicopathological characteristics of patients with LUAD were extracted from the Tianjin First Central Hospital in China between June 2013 and June 2014. Results: The expression of NDRG2 was significantly decreased in patients with LUAD. Expressions of NDRG2 and EGFR-sensitizing mutations showed positive correlations with survival. ROC curve analyses showed that the diagnostic value of NDRG2 combined with EGFR in LUAD was significantly higher than that of each biomarker alone. Expression of NDRG2 and EGFR-sensitizing mutations were associated with the longer overall survival (OS), disease-free survival (DFS) and progression-free survival (PFS). Advanced stages were significantly associated with low expression of NDRG2. In multivariate analysis, compared with other patients, NDRG2 (+)/EGFR (+) was independently associated with prolonged OS and PFS. Conclusion: NDRG2 combined with EGFR-sensitizing mutations might be valuable markers to evaluate the prognosis of LUAD patients.
Neuroprotective effects of dexmedetomidine on the ketamine-induced disruption of the proliferation and differentiation of developing neural stem cells in the subventricular zone
Authors: Sha Huanhuan , Peng Peipei , Li Bing , Wei Guohua , Wang Juan , Wu Yuqing , Huang He 
Published: August 2020

Abstract
Background: Recently, the number of neonatal patients receiving surgery under general anesthesia has increased. Ketamine disrupts the proliferation and differentiation of developing neural stem cells (NSCs). Therefore, the safe use of ketamine in pediatric anesthesia has been an issue of increasing concern among anesthesiologists and the children’s parents. Dexmedetomidine (DEX) is widely used in sedation, as an antianxiety agent and for analgesia. DEX has recently been shown to provide neuroprotection against anesthetic-induced neurotoxicity in the developing brain. The aim of this in vivo study was to investigate whether DEX exerted neuroprotective effects on the proliferation and differentiation of NSCs in the subventricular zone (SVZ) following neonatal ketamine exposure.Methods: Postnatal day 7 (PND-7) male Sprague-Dawley rats were equally divided into the following 5 groups: Control group (n=8), Ketamine group (n=8), 1 μg/kg DEX+Ketamine group (n=8), 5 μg/kg DEX+Ketamine group (n=8) and 10 μg/kg DEX+Ketamine group (n=8). The proliferation and differentiation of NSCs in the SVZ were assessed using immunostaining with BrdU incorporation. The levels of Nestin and β-tubulin III in the SVZ were measured using Western blot analyses. Apoptosis was assessed by detecting the levels of the cleaved caspase-3 protein using Western blotting.Results: Neonatal ketamine exposure significantly inhibited NSC proliferation and astrocytic differentiation in the SVZ, and neuronal differentiation was markedly increased. Furthermore, pretreatment with moderate (5 μg/kg) or high doses (10 μg/kg) of DEX reversed the ketamine-induced disturbances in the proliferation and differentiation of NSCs. Meanwhile, neonatal ketamine exposure significantly decreased the expression of Nestin and increased the expression of β-tubulin III in the SVZ compared with the Control group. Treatment with 10 μg/kg DEX notably reversed the ketamine-induced changes in the levels of Nestin and β-tubulin III. In addition, a pretreatment with 10 μg/kg DEX before ketamine anesthesia prevented apoptosis in the SVZ induced by neonatal ketamine exposure.Conclusions: Based on our findings, DEX may exert neuroprotective effects on the proliferation and differentiation of NSCs in the SVZ of neonatal rats in a repeated ketamine anesthesia model.