bluuebunny/crossref_metadata_2025_split huggingface dataset:
Factors associated with antenatal exercise in Arba Minch town, Southern Ethiopia: A community-based cross-sectional study
Authors: Beyene Maechel Maile , Shimbre Mulugeta Shegaze , Ukke Gebresilasea Gendisha , Gebremichael Mathewos Alemu , Gurara Mekdes Kondale 
Published: February 2022

Background
Many health risks in pregnant women and their foetuses can be reduced by practicing antenatal exercise. However, the adequate practice of antenatal exercise among pregnant women is low in Ethiopia. Therefore, this study aimed to assess the practice of antenatal exercise and its associated factors among pregnant women in Arba Minch town.

Methods
A community-based cross-sectional study design was conducted. Data were collected by using a structured questionnaire from 422 pregnant women selected by a simple random sampling technique. Descriptive statistics were computed and a binary logistic regression model was fitted. In multivariable logistic-regression adjusted odds ratio (AOR) with 95% confidence intervals were used to determine the strength of associations. The significance level was declared at a p-value < 0.05.

Results
Among 410 participants, 32.9% (95% CI 28%-37%) adequately practiced antenatal exercise. Factors negatively associated with an adequate antenatal exercise were husband’s primary school level [Adjusted odds ratio (AOR) = 0.3, (95% CI: 0.1, 0.7)], history of miscarriage [AOR = 0.3, (95% CI: 0.1, 0.7)], inadequate knowledge [AOR = 0.2, (95% CI: 0.1, 0.3)], and unfavorable attitude [AOR = 0.3, (95% CI 0.2, 0.5)]. Whereas, factors positively associated with an adequate antenatal exercise were employment status of women [AOR = 4.8, (95% CI: 1.8, 13.1)], and a practice of regular exercise before current pregnancy [AOR = 1.9, (95% CI: 1.1, 3.2)].

Conclusions
The findings of this study indicated that adequate practice of antenatal exercise was found to be low. Appropriate measures should be taken to improve the husband’s educational level, mother’s occupation, knowledge, and attitudes towards antenatal exercise. Special consideration should be given to those with a history of miscarriage and women should be encouraged to practice regular exercise before pregnancy.
Identification of a biological form in the Anopheles stephensi laboratory colony using the odorant-binding protein 1 intron I sequence
Authors: Khan Jehangir , Gholizadeh Saber , Zhang Dongjing , Wang Gang , Guo Yan , Zheng Xiaoying , Wu Zhongdao , Wu Yu 
Published: February 2022

BackgroundAnopheles stephensiListen (1901) is a major vector of malaria in Asia and has recently been found in some regions of Africa. TheAn.stepehnsispecies complex is suspected to have three sibling species: type, intermediate, and mysorensis, each with its own vector competence to the malaria parasite and ecology. To identify the members of the species complex in ourAn.stephensiinsectary colony, we used the morphological features of eggs and genetic markers such asAnsteObp1 (Anopheles stephensiodorant binding protein 1), mitochondrial oxidases subunit 1 and 2 (COI and COII), and nuclear internal transcribed spacer 2 locus (ITS2).MethodsEggs were collected from individual mosquitoes (n= 50) and counted for the number of ridges under stereomicroscope. Genomic DNA was extracted from female mosquitoes. After the amplification of partial fragments ofAnsteObp1, COI, COII and ITS2 genes, the PCR products were purified and sequenced. Phylogenetic analysis was performed after aligning query sequences against the submitted sequences in GenBank using MEGA 7.ResultsThe range of ridges number on each egg float was 12–13 that corresponds to the mysorensis form ofAn.stephensi. The generated COI, COII and ITS2 sequences showed 100%, 99.46% and 99.29% similarity with the sequences deposited for Chinese, Indian and Iranian strains ofAn.stephensi, respectively. All the generatedAnsteObp1 intron I region sequences matched 100% with the sequences deposited forAn.stephensisibling species C (mysorensis form) from Iran and Afghanistan.ConclusionsThis manuscript precisely describes the morphological and molecular details of the ‘var mysorensis’ form ofAn.stephensithat could be exploited in elucidating its classification as well as in differentiation from other biotypes of the same or otheranophelinespecies. Based on our findings, we recommendAnsteObp1 as a robust genetic marker for rapid and accurate discrimination (taxonomic identification) of theAn.stephensispecies complex, rather than the COI, COII, and ITS2 marker, which could only be utilized for interspecies (Anopheles) differentiation.
Centered Hardy-Littlewood maximal function on product manifolds
Authors: Zhao Shiliang 
Published: February 2022

Abstract
Let X be the direct product of Xi
where Xi
is smooth manifold for 1 ≤ i ≤ k. As is known, if every Xi
satisfies the doubling volume condition, then the centered Hardy-Littlewood maximal function M on X is weak (1,1) bounded. In this paper, we consider the product manifold X where at least one Xi
does not satisfy the doubling volume condition. To be precise, we first investigate the mapping properties of M when X
1 has exponential volume growth and X
2 satisfies the doubling condition. Next, we consider the product space of two weighted hyperbolic spaces X
1 = (ℍ
n+1, d, yα

−n−1
dydx) and X
2 = (ℍ
n+1, d, yβ

−n−1
dydx) which both have exponential volume growth. The mapping properties of M are discussed for every

α
,
β
≠

n
2

\alpha,\beta \ne {n \over 2}

. Furthermore, let X = X
1 × X
2 × … Xk
where Xi
= (ℍ
ni

+1, yαi

−

ni

−1
dydx) for 1 ≤ i ≤ k. Under the condition

α
i

>

n
i

2

{\alpha_i} > {{{n_i}} \over 2}

, we also obtained the mapping properties of M.
How quarry waste limestone filler affects the rheological behavior of cement-based materials
Authors: Safiddine Salim , Amokrane Kamel , Debieb Farid , Soualhi Hamza , Benabed Benchaa , Kadri El-Hadj 
Published: February 2022

AbstractThe main objective of this work is to highlight experimentally the effect of quarry waste limestone fillers (LF) on the rheological properties of concrete. All mixtures were made with water-to-cement ratio (W/C) of 0.50. The method adopted based on the rheological behavior of concrete incorporating LF as a partial substitute for sand in multi-scale systems (concrete, mortar, grout and LF suspension). The replacement ratio of sand by LF ranged from 0% to 20% (by weight of sand) in concrete and mortar. Whereas, the addition of LF varied from 0% to 60% (by weight of cement) in cement grout. The rheological behavior of concrete and mortar was modeled by the Bingham model with sufficient precision. However, the cement grout shows a nonlinear behavior, which was modeled by the Herschel-Bulkley model. Results indicate that the use of LF has a significant effect on the superplasticizer (Sp) demand of concrete and mortar, for a given slump on one hand. On the other hand, an increase in yield stress, apparent viscosity and flow time of cement grout was obtained when LF is incorporated, which results in a loss of fluidity of the suspensions of LF.
Comparing results of real-scale time MHD modeling with observational data for first flare M 1.9 in AR 10365
Authors: Borisenko Alexey Vasilevich , Podgorny Igor Maksimovich , Podgorny Alexander Igorevich 
Published: February 2022

Abstract
As shown in the first results of MHD simulations in the real scale of time, above the active region (AR) 10365, during the first flare M 1.9 (05/26/2003 05:34) at a height of 16–18 mm (lower corona), a singular line of magnetic field appears. The local maximum of the current density is situated on this singular line. The magnetic field in the vicinity of this singular line is the superposition of an X-type magnetic configuration and a divergent magnetic field. The accumulation of magnetic energy for solar flare with current sheet creation takes place near this singular line due to magnetic field deformation by disturbances in the X-type configuration in spite of the presence of overlaid diverging magnetic configuration. The magnetic configuration is so complicated that the singular line can be found only by using specially developed graphical system of search. The position of singular line coincides with position of source of flare radio emission at the frequency 17 GHz above AR 10365 measured by Nobeyama Radioheliograph (NoRH). Also, MHD simulation shows appearance of the singular line, in the vicinity of which X-type configuration dominates. However, apparently due to small disturbance, propagating from the photosphere, sufficient magnetic energy was not accumulated in this configuration, so the NoRH does not show the flare source of emission at the frequency 17 GHz in the place, where this singular line is situated.
China English and College Intercultural Education: A Cultural Linguistic Perspective
Authors: Yan Ming 
Published: February 2022

Abstract
In the era of globalization, English as an international language (EIL) is also the medium of intercultural communication for the international community. Based on the theory of cultural linguistics (CL), which regards language as culture-oriented rather than structure-oriented, Sharifian (2009, p. 4) has proposed that varieties of English which constitute EIL result from the interaction between the English language and different local cultures. CL suggests that China English (CE) should be understood in this light: It is not a substandard interlanguage, but a variety of English with its own cultural value and right. This paper intends to systemically analyze the nature of CE and its value in intercultural communication so as to better understand current intercultural education. Over a long time, much emphasis has been laid on the importance of adapting to the target language culture to the neglect of home language culture in our College English classrooms, thus resulting in what is known as Chinese cultural aphasia. In the light of CL, intercultural communication competence (ICC) encompasses not only knowing English and adapting to its culture, but also using CE to introduce the native culture in which CE plays an irreplaceable role. Therefore, CE is undoubtedly a key remedy for Chinese cultural aphasia. More research on CL should be conducted as it provides felicitous disciplinary guidance for our college intercultural education.
The “Wrong Love” Between the Zone of Proximal Development and Scaffolding: An Interview With Prof. James P. Lantolf
Authors: Qin Lili 
Published: February 2022

Abstract
The zone of proximal development (ZPD) and the scaffolding theory are very different, both in terms of their theoretical origins and connotations, and can even be said to be very different. However, during the development of the two concepts, some scholars have misunderstood them, resulting in the two being mistaken for similar concepts and therefore often confused. Professor James Lantolf from Pennsylvania State University (State College, USA) was interviewed by Professor Lili Qin from Dalian University of Foreign Studies (Dalian, China) and provides an in-depth analysis of these issues. The interview begins with the theoretical roots, connotations and definitions of the ZPD and scaffolding concepts, and then unravels the story of how they have been “mistakenly loved for life”, and ultimately it is made clear that the two concepts are completely different in their practical application to language teaching and should not continue to be used interchangeably.
Transcendental operators acting on slice regular functions
Authors: de Fabritiis Chiara 
Published: February 2022

Abstract
The aim of this paper is to carry out an analysis of five trascendental operators acting on the space of slice regular functions, namely *-exponential, *-sine and *-cosine and their hyperbolic analogues. The first three of them were introduced by Colombo, Sabadini and Struppa and some features of *-exponential were investigated in a previous paper by Altavilla and the author. We show how exp*(f ), sin*(f ), cos*(f ), sinh*(f ) and cosh*(f ) can be written in terms of the real and the vector part of the function f and we examine the relation between cos* and cosh* when the domain Ω is product and when it is slice. In particular we prove that when Ω is slice, then cos*(f ) = cosh*(f * I) holds if and only if f is ℂ
I
preserving, while in the case Ω is product there is a much larger family of slice regular functions for which the above relation holds.
Factors affecting cyclic lifetime of EB-PVD thermal barrier coatings with various bond coats
Authors: Schulz U. , Lau H. , Rätzer-Scheibe U. , Kaysser W. A. 
Published: February 2022

Abstract
Standard EB-PVD (electron beam physical vapor deposition) thermal barrier coatings (TBCs) of partially yttria-stabilized zirconia were applied on Ni-base substrate alloys and thermally cycled with T
max = 1100 °C. Two different bond coats were investigated: NiCoCrAlY and NiPtAl. The longest lifetimes have been achieved on the Hf-containing Rene142 substrate. A rough interface between TGO (thermally grown oxide) and bond coat with hafnia pegs is characteristic for these alloys. A bond coat heat treatment in Ar–H significantly improved the lifetime of the TBC system with IN100 + PtAl bond coats, whereas reduced lifetimes were found on IN100 + NiCoCrAlY. Spallation of the TBCs was correlated to TGO thickness and microstructure. The TGO growth is faster for NiCoCrAlY than for NiPtAl bond coats, while TBC lifetime is longer for the NiCoCrAlY systems. Tests with reduced cycle length yielded an increased number of cycles to failure for IN100+NiCoCrAlY, but left the time to failure at temperature unchanged. TBC thickness had only a limited influence on cyclic lifetime.
Mean stress sensitivity of sintered iron and steel
Authors: Namazov S. N. , Abdalla G. , Dalgic M. , Gudenau H. W. , Beiss P. 
Published: February 2022

Abstract
There is a well-based correlation between the pulsating amplitude σ
A(R = 0) and the alternating amplitude σ
A(R = – 1) in fatigue testing of sintered iron and steel which permits to predict the mean stress sensitivity and the pulsating amplitude if the alternating endurance limit σ
A(R = – 1) has been measured. Without loss of precision the relationship can be extended from smooth unnotched specimen geometries to notched geometries if only the stress concentration factor is known. The coefficients of the predictive equation depend on the brittleness of the material, a systematic approach to take the brittleness into account is still missing. In Haigh diagrams, the slope of the σ
A–σ
m diagram with tensile mean stresses can be linearly extrapolated also into the compressive mean stress range σ
m < 0.
Reaktionssintern von AlMg–MgO zur Herstellung von Bauteilen auf Spinellbasis
Authors: Dierkes S. , Kuntz M. , Grathwohl G. 
Published: February 2022

Abstract
Ein neues Verfahren zur Herstellung von Spinellbasis-Werkstoffen durch Reaktionssintern wird vorgestellt. Die Oxidation von metallischem Aluminium wird sowohl durch das Legierungselement Magnesium als auch durch den Kontakt mit Magnesiumoxid beschleunigt, so dass bei der hier gewählten Zusammensetzung eine besonders günstige Reaktionskinetik erreicht wird. Für den Erfolg des Verfahrens ist die exakte Steuerung der auftretenden Effekte, insbesondere der Zeitpunkt der Benetzung von MgO durch Aluminium, von entscheidender Bedeutung. Ein vollständiger Abschluss der Reaktion kann bei Temperaturen von 900 bis 1000 °C erreicht werden, wobei sich ein charakteristisches Keramikgefüge mit einer dominierenden geschlossenen Porosität einstellt. Der Werkstoff wird dadurch weitgehend gasdicht. Durch die Volumenkonstanz bei der Reaktionssinterung eignet sich das Material unter anderem zur Verbindung mit anderen Bauelementen aus Keramik oder Metall.
Writing assistant scoring system for English second language learners based on machine learning
Authors: Lyu Jianlan 
Published: February 2022

Abstract
To reduce the workload of paper evaluation and improve the fairness and accuracy of the evaluation process, a writing assistant scoring system for English as a Foreign Language (EFL) learners is designed based on the principle of machine learning. According to the characteristics of the data processing process and the advantages and disadvantages of the Browser/Server (B/S) structure, the equipment structure design of the project online evaluation teaching auxiliary system is further optimized. The panda method is used to read the data, the clean method is used to realize the data preprocessing, the model test is carried out, the cross validation method is selected, the data is divided in advance, and the process of programming the problem scoring system is further optimized, the automatic scoring technology is constructed by English teaching recognition module, feature extraction module and scoring module, the table structure of programming problems is designed, the auxiliary evaluation program of English writing is designed, and the design of writing auxiliary scoring system is completed. The analysis of the experimental results shows that the accuracy of the system is close to 90%, and the total average difference is 0.56. The system can normally take out a variety of test papers. Considering the subjectivity of manual scoring and the impact of key code setting on scoring, the carefully set key code can effectively improve the scoring accuracy of the system. The scoring strategy of the automatic scoring system is effective and the scoring effect is good, and it can be used in practical application.
The positron and mechanical parameters of a cold-worked aluminum alloy (3004) Using PALT, PADBT and HV**
Authors: Mostafa Ahmed , Mostafa Mostafa Y. A , Abdel-Rahman M. , Abdel-Rahman M. A. , Badawi Emad A. , Lin Y. C. 
Published: February 2022

Abstract
In the present work, the influence of plastic deformation on the properties of a 3004 Al-alloy was studied with different techniques. Crystallite size, dislocation density, defect density, micro-strain, and stored dislocation energy are presented and compared for different three techniques.

Methodology
Many techniques for detecting defects have been developed, such as the positron annihilation lifetime technique (PALT), the positron annihilation Doppler broadening technique (PADBT), and the Vickers hardness test (HV).

Implications
The positron mean lifetime value of a non-deformed sample is 173±4.8 ps, which increases until the thickness reduction reaches a 10% deformation then saturated at saturation trapping of the positron in defect states with a mean of 221±5 ps. At an S-parameter of 0.3709±0.0031, a W-parameter of 0.5885±0.0057 was obtained at zero deformation: this decreases until saturation at 10% deformation.

Findings
A good correlation between the three techniques is observed for mean crystallite size. A good correlation was also noted between PALT and PADBT from 0 to 10% thickness reduction. HV has good correlations with PALT and PADBT from 0 to 6% thickness reduction: then a clear difference was found from 6 to 15% thickness reduction.

Originality
such results confirm the fact that the used technique can effects on the obtained results in some limitations.
Is Zoom viable for sociophonetic research? A comparison of in-person and online recordings for sibilant analysis
Authors: Calder Jeremy , Wheeler Rebecca 
Published: February 2022

Abstract
This study is part of a larger project investigating whether Zoom is a viable data collection method for sociophonetic research, examining whether Zoom recordings yield different acoustic measurements than in-person recordings for the exact same speech for 18 speakers. In this article we analyze five spectral measures of sibilants (peak, center of gravity, standard deviation, skewness, and kurtosis) which have been shown to be conditioned by dimensions of identity like speaker gender and sexual orientation in much previous sociolinguistic research. We find that, overall, Zoom recordings yield significantly lower peak, center of gravity, and standard deviation measurements and significantly higher skewness and kurtosis values than in-person recordings for the same speech, likely due to a lower sampling rate on Zoom recordings. However, a preliminary analysis controlling for sampling rate across recording methods reveals the opposite patterns for nearly all measures, suggesting that Zoom stretches the spectral space when compared with the in-person recorder. Because the values of these measurements can lead analysts to draw social interpretations relating to a speaker’s performance of gender and sexual identity, we caution against comparing across Zoom and in-person recordings, as differences in measurements may result from the recording method used to collect the data.
First record of the Peale’s free-tailed bat Nyctinomops aurispinosus (Peale, 1848) (Chiroptera, Molossidae) from Chile revealed by acoustic surveys, with notes on ecology and distribution
Authors: Rodríguez-San Pedro Annia , Ugarte-Núñez Joaquín A. , Beltrán Clemente , Allendes Juan Luis 
Published: February 2022

Abstract
The bat fauna from the extreme north of Chile is poorly known, principally due to a lack of dedicated surveys. To better assess the diversity of bats there, we conducted acoustic surveys at Arica city and three coastal valleys (Azapa, Lluta and Camarones) in the Arica and Parinacota region, Chile. We obtained 82 acoustic records of the Peale’s free-tailed bat (Nyctinomops aurispinosus) in nine sites within the region. This species had not been previously documented in Chile but was known from adjacent Tacna province, Peru. Echolocation calls of N. aurispinosus can be distinguished from other molossid bat species occurring in the area by its lower frequency range. Our data suggest a wide distribution of N. aurispinosus across the coastal valleys of the Arica and Parinacota region, where they were active in both natural and anthropized habitats. This southernmost record of N. aurispinosus for the Pacific coast, extends its known range ca. 150 km southward, and increases up to 15 the number of bat species in Chile.
Comparison of three methods for measuring the bending stiffness of ultrafine metal wires
Authors: Li Jianna , Shao Huiqi , Chen Xi , Shao Guangwei , Jiang Jinhua , Chen Nanliang 
Published: February 2022

Abstract
Ultrafine metal wires have been widely used as structural constituents of metal meshes for electromagnetic interference shielding. To investigate the bending property of metal wires during the knitting process, the three-point bending, cantilever bending, and pure horizontal bending methods were carried out and compared. The relationships among the bending property, the twist pitch and the number of twisted wire strings were also analyzed. The specific dependence of the bending stiffness on twist pitch resulted from the internal frictional constraints, and a twist pitch of 4.5 mm was chosen as the optimized twisted parameter. The bending properties evaluated by the three methods were equally sensitive to the twist pitch, and a similar linear trend of bending stiffness with the number of twisted wire strings was found. The values of bending stiffness from the three methods were significantly different, and the descending order was the three-point bending, the cantilever bending, and the pure horizontal bending method. The correlation coefficient of the three methods was higher than 0.935, which is a strong positive correlation. From the investigation came a conclusion that the three-point bending method is more useful in realistic conditions because of its diversity and universality for various bending deformations.