bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the current situation of rural tourism in southern Fujian in China after the COVID-19 epidemic
Authors: Lin Jao-Chuan , Lin Hsiao-Hsien , Lu Shih-Yun , Chien Jung-Hul , Shen Chih-Chien 
Published: February 2022

Abstract
The present study examines the impact of the tourism industry on rural development and ecological environment after the COVID-19 epidemic from the perspectives of different stakeholders, taking the rural villages of Fujian as an example. The study was conducted using a hybrid study method. 402 valid questionnaires were analyzed using SPSS 22.0 statistical software, statistical and t-test methods, and then the results of the interviews and field surveys were compiled, compared, and examined by multivariate verification. The results found that insufficient parking and recreation, bicycle lanes and commentary facilities, rising prices of land and houses, deteriorating community environment and air quality, inadequate police and security personnel and communication channels for the community, and low awareness of community service among residents have bothered the residents. The poor communication channels in the community, lack of manpower for infrastructure, bicycle lanes, sightseeing indicators, preferential measures, and police and security, poor water quality, and overflow of garbage make tourists feel bad. Different stakeholders have different views on the current development of local society, humanities, environment, and natural ecology.
Investigating the impact of task complexity on uptake and noticing of corrective feedback recasts
Authors: Rezaei Amir , Valeo Antonella 
Published: February 2022

Abstract
This study investigated the relationship between task complexity, second language (L2) learners’ response and awareness of corrective feedback provided in the form of recasts during teacher–student interaction. Drawing on Robinson’s Triadic Componential Framework, the study examined how degrees of task complexity created by two specific task characteristics had an impact on learners’ responses (referred to as uptake), and their reported noticing of grammatical and lexical recasts. Data documenting learners’ uptake, operationalized as changes in response to feedback during interactions and noticing of recasts, as indicated in students’ self reports of detection and attention to recasts, were collected during one-on-one interaction sessions and stimulated recall sessions with ESL learners in Canada. Frequency analysis and Cochran’s Q analysis with multiple McNemar post hoc tests were carried out to compare the uptake and noticing of recasts across different tasks. The results revealed that tasks with different degrees of complexity impacted uptake and noticing of recasts differently. The results also showed that linguistic target, i.e., lexical or grammatical features, modulated the relationship between task complexity and recast uptake and noticing. The study calls for a more nuanced approach to investigating task complexity in research, and for practitioners to consider task complexity in decision making related to the use of corrective feedback and the design of classroom-based tasks.
Non-Linear Heat Transport Effects in Systems with Defects
Authors: Jou David , Restuccia Liliana 
Published: February 2022

Abstract
In this paper we explore several aspects of the influence of fixed and of mobile defects on the thermal conductivity of materials. In particular, we investigate the effects of the temperature and defect concentration dependence of the conductivity on phononic diodes and transistors and on the non-linear thermal conductivity dependent on the heat flux in thermal superlattices.
Association between cesarean section rate and maternal age in twin pregnancies
Authors: Kim Seongbeen , Song Eunjin , Park Ye Hyon , Cho Aeri , Choe Kiroong , Kim Hyeon Ji , Park Jee Yoon , Kim Bohyoung , Oh Kyung Joon 
Published: February 2022

Abstract

Objectives
To evaluate the effect of maternal age to the cesarean section rate of twin pregnancies in late preterm and term gestation.

Methods
A retrospective study was performed on twin pregnancies delivered at Seoul National University Bundang Hospital from June 2003 to December 2020. Preterm births before 34 weeks of gestation were excluded, and only live births were analyzed. The patients were classified into four groups according to maternal age (<30, 30–34, 35–39, and ≥40 years). The primary outcome was the rate of cesarean section.

Results
The median value of maternal body mass index, the rate of assisted reproductive technology, dichorionic twin pregnancy, preeclampsia, and gestational diabetes increased significantly according to the maternal age group (all p<0.05). Among a total of 2,075 twin pregnancies, the rates of cesarean section were 65, 74, 80, and 95% for groups with maternal age under 30, 30–34, 35–39, and ≥40 years, respectively (p<0.001). The cesarean section rates after a trial of labor were 22, 22, 28, and 63%, respectively (p=0.032). Maternal old age was an independent risk factor for cesarean section after a trial of labor in both nulliparous and multiparous women after adjusting for confounding factors.

Conclusions
The rate of cesarean section in twin pregnancies significantly increased as maternal age increased, even in multiparous women.
Nodal lines in momentum space: topological invariants and recent realizations in photonic and other systems
Authors: Park Haedong , Gao Wenlong , Zhang Xiao , Oh Sang Soon 
Published: February 2022

Abstract
Topological insulators constitute one of the most intriguing phenomena in modern condensed matter theory. The unique and exotic properties of topological states of matter allow for unidirectional gapless electron transport and extremely accurate measurements of the Hall conductivity. Recently, new topological effects occurring at Dirac/Weyl points have been better understood and demonstrated using artificial materials such as photonic and phononic crystals, metamaterials and electrical circuits. In comparison, the topological properties of nodal lines, which are one-dimensional degeneracies in momentum space, remain less explored. Here, we explain the theoretical concept of topological nodal lines and review recent and ongoing progress using artificial materials. The review includes recent demonstrations of non-Abelian topological charges of nodal lines in momentum space and examples of nodal lines realized in photonic and other systems. Finally, we will address the challenges involved in both experimental demonstration and theoretical understanding of topological nodal lines.
The effects of wood chip compression on cellulose hydrolysis
Authors: Villalba Miguel E. , Trajano Heather L. , Olson James A. 
Published: February 2022

Abstract
Previously it was shown that wood chip compression or enzyme impregnation prior to refining reduces energy consumption and improves pulp quality. This work characterizes the effect of different magnitudes and rates of compression on the extent of enzymatic hydrolysis. A laboratory compressor and a controlled uniaxial load set-up were used to apply different compression ratios and compression times to mixed-softwood wood chips. The chips were subsequently subjected to enzymatic hydrolysis with a high-yield exoglucanase preparation to demonstrate changes in cellulose hydrolysis. Enzymatic hydrolysis yield increased with compression ratio but was unaffected by compression time. Increasing compression ratio increased removal of soluble molecules such as sugars and acid-soluble lignin. Microscopy imaging showed increased cell wall buckling and fracturing with increased compression. The morphological changes led to improved enzyme diffusion and resulted in higher available surface area. The improved cellulose hydrolysis is due to changes in wood morphology as well as the removal of extractives.
Anticancer properties of arylchromenes and arylchromans: an overview
Authors: de Freitas Rego Yuri , Morais Costa Nathália Evelyn , Martins de Lacerda Rodrigo , Faleiros da Silva Maia Angélica , da Silva Cleiton Moreira , de Fátima Ângelo 
Published: February 2022

Abstract
Cancers are a set of pathologies originated by cells that have the ability to divide and multiply uncontrollably, associated with the capacity to invade and colonize adjacent tissues. Chemotherapy is one of the main approaches of treatment for cancer patients. Despite of the numerous antineoplastic drugs available, cancer cannot be cured; particularly at the late stages deprived of any side effect. Arylchromenes and arylchromans are a group of small molecules, of natural or synthetic origin, of great interest as prototypes for the drug development, especially against cancer. In this chapter, we will present the antineoplastic activity studies of the most promising examples of these arylchromenes and arylchroman derivatives.
Combined temperature and velocity field measurements in thermal fluid systems with magnetic resonance velocimetry
Authors: Bruschewski Martin , John Kristine , Benson Michael J. , Grundmann Sven 
Published: February 2022

Abstract
A method for the combined measurement of velocity and temperature fields in water using magnetic resonance velocimetry (MRV) is presented. MRV can provide accurate volumetric, time-averaged temperature and velocity field data. However, the choice of the flow medium and other materials is limited due to the requirements placed on the magnetic properties. There are also limitations to the measurable fluid velocities and temperatures. The echo time TE, which typically defines the temperature sensitivity, is particularly important for temperature measurement in fluid flows. A longer TE means better temperature precision, but measurement errors are increased. In addition, material properties such as magnetic susceptibility and electrical conductivity are temperature-dependent and this can lead to systematic errors in the temperature results. The design of the MRV experiment must take all of these effects into account. Here, a measurement method is proposed that includes various corrective measures. The capabilities are demonstrated with two types of experiments, a pin-fin heat exchanger and a jet-in-crossflow experiment. The fluid in these systems is water with velocities of up to 1 m/s and a temperature between 20 °C and 50 °C. These experiments demonstrate the possibilities of performing quick parameter studies with MRV while achieving low measurement uncertainty and low systematic errors.
Synthesis and structural characterization of three new mixed ligand alkaline-earth metal picrates
Authors: Parsekar Neha U. , Narvekar Kedar U. , Srinivasan Bikshandarkoil R. 
Published: February 2022

Abstract
The dissolution of alkaline-earth metal carbonate in aqueous picric acid followed by reaction with nicotinamide results in the formation of [M(H2O)
n
(nic)2(pic)2] (nic = nicotinamide; pic = picrate; n = 1 and M = Ba 1; n = 2 and M = Ca (or Sr) 2 (or 3)). In [Ba(H2O)(nic)2(pic)2] 1, the barium and the oxygen atoms of a terminal aqua ligand are located on a two-fold axis. Compound 1 exhibits a {BaO7N2} coordination sphere, where the barium atom is bonded to a unique bidentate picrate and the crystallographically independent nicotinamide bridges to two symmetry related barium atoms with a Ba···Ba separation of 9.799 Å via the pyridine nitrogen and the amide oxygen atoms leading to the formation of a two-dimensional coordination polymer. The compounds 2 and 3 are isostructural with discrete molecules. The central Ca atom in 2 (or Sr in 3) located on a two-fold axis is bonded to a crystallographically unique terminal aqua ligand, an independent monodentate nicotinamide and a unique bidentate picrate anion resulting in a distorted {MO8} polyhedron. The mixed ligand alkaline-earth metal picrates 1–3 exhibit three varieties of hydrogen bonding and π–π stacking interactions. Several alkaline-earth metal picrates are compared in this study.
Research on Impact Factors of Workability of Roller Compacted Concrete Based on Modified Vebe Test
Authors: Zhong Yixiong , Yao Jialiang , Lin Jun , Yao Ding 
Published: February 2022

Abstract
To obtain the optimum workability of roller compacted concrete (RCC), it is necessary to fully consider the degree of influence of each component of RCC. In this research, the influence of water-cement ratio, the content of cement slurry, the content of mortar, the sand ratio, the particle size of maximum aggregate, and the content of mineral powder on the workability of RCC was studied by modified Vebe test. The results showed that the Vebe consistency decreased with the increase of water-cement ratio. The recommended range of cement slurry surplus parameter was 1.1∼1.4; the recommended range of cement mortar surplus parameter was 1.2∼1.6; mixing the fly ash and silica fume into RCC is beneficial to its workability, but the content of fly ash could not exceed 20 %, and the optimum value of the content of silica fume was between 5 and 7.5 %; and the sand ratio has a significant effect on RCC, and there is an optimal sand ratio just like ordinary concrete, which is 34 % in this study.
Total Phenolic, Total Flavonoid Content and in vitro Sun Protection Factor test of Arabica Coffee Leaves Extract (Coffea arabica L)
Authors: Fatmawati Sofia , Sjahid Landyyun Rahmawan , Utami Nadiyya Maulida , Kartini Kartini 
Published: February 2022

Background: Arabica coffee leaf (Coffea arabica L.) is a well-known plant by the Indonesian people because it has many benefits apart from being a drink. Coffee leaves are known to have good antioxidant activity. The use of antioxidants in sunscreen preparations can prevent various diseases caused by UV radiation from UV rays’ sunlight.
Aim: This study aims to determine the phenol content, the flavonoid content and the value of Sun Protection Factor (SPF) from differences between solvent extracts of arabica coffee leaves (Coffea arabica L.).
Method: The extraction method used was maceration with solvents: 70% ethanol, 96% ethanol and methanol. Determination of phenol content was carried out using the Folin ciocalteu method. Determination of flavonoid content was done by the AlCl3 method. SPF value is based on the Mansur equation from absorbance scanning using UV Spectrophotometry.
Result: The results obtained were the highest phenol and flavonoid content is in the methanolic extract of arabica coffee namely 62.371 ± 0.47 mgGAE/g and 8.6707 ± 0.04 mgQE/g. In the SPF test, the highest value was obtained from 70% ethanol extract of 5.0593 ± 1.28 at 100 ppm extract concentration with intermediate protection category.
Conclusion: Arabica coffee leaves have the potential as an active ingredient in herbal sunscreens
The design and efficiency of a physical education program to promote attitudinal changes towards people with visual impairments
Authors: Cordente Mesas David , González Víllora Sixto , Contreras Jordán Onofre 
Published: February 2022

The main goal of this study was to design, and confirm the efficiency of, a formative Physical Education program with the purpose of improving schoolchildren’s attitudes towards people who have a visual impairment. The participants were 910 students aged 9 to 13 years old from the region of Castilla-La Mancha (Spain). Participants simulated visual impairment during eight Physical Education sessions within the context of play and a sports-based learning environment. They completed an attitudinal questionnaire both pre and post the intervention. The author’s (2018) aim was to evaluate children’s attitudes toward both visual impairment and integrated Physical Education CAIPE-R (Block, 1995). Both a descriptive and comparative analyses, as well as ANOVA, were conducted. The results indicated a significant improvement in children’s attitudes toward those with visual impairment. Therefore, this program would be efficacious when applied in schools in the future in order to promote a better attitude toward inclusion.
Simulation of Kinetic Processes, Optical and Neutron Properties of the Nuclear-Excited Dusty Plasma of Noble Gases
Authors: Budnik A.P. , Deputatova L.V. , Fortov V.E. , Lunev V.P. , Vladimirov V.I. 
Published: February 2022

A model of kinetic processes in the argon-xenon gas plasma with the admixture of uranium nanoclusters is developed. This dusty plasma seems to be perspective as an active laser medium in the technologies of direct conversion of the nuclear energy into coherent light. The process of formation of quasistationary states in plasma and the influence of uranium nanoclusters are considered in the developed mathematical model of the kinetic processes in the argon-xenon gas excited by nuclear fission fragments. The suggested system of equations allows one to describe the kinetic processes in the plasma with presence of the uranium dust in a self-consistent way. The model include the evolutionary equations for the distribution function of electron velocities and for concentrations of a different components of plasma, including charged uranium nanoclusters. The model takes 44 components of plasma and 507 plasma-chemical processes into account. The method of solution of such equations is suggested, and the program complex realizing this method is developed. The influence of the dust concentration on the optical and neutronic properties of the plasma media is studied in calculations. The calculation of the neutron multiplication factor for the laser active infinite medium containing uranium dust particles is performed with the use of MCNP-5 code. The neutron cross-sections needed for calculations were taken from the ENDF/b-VI library. The attenuation of electromagnetic waves by uranium dust particles was calculated in the frame of the Mie theory for various spherical particle sizes and different wavelengths. Real and imaginary parts of the refraction coefficient for uranium needed for this calculation were taken from the experimental and theoretical works.
BİR EĞİTİM VE ARAŞTIRMA HASTANESİNDE COVİD-19 ENFEKSİYONU NEDENİ İLE İMMÜN PLAZMA UYGULANAN HASTALARIN DEĞERLENDİRİLMESİ
Authors: HIRÇIN CENGER Derya , YENİCE AKTAŞ Sevinç , İLERİ FİKRİ Burcu , KUTBAY Hatice , ALBAYRAK Merih Dilan , ALTİN Sedat 
Published: February 2022

Amaç
COVID-19 enfeksiyonu tedavisi için immün plazma
uygulanan hastaların demografik ve klinik verilerinin
ve immün plazma transfüzyonu ile ilişkili reaksiyonların
değerlendirilmesi amaçlanmıştır.
Gereç ve Yöntem
Etik kurul onayı alınılan çalışma, retrospektif ve tanımlayıcı
bir araştırmadır. 2020 yılında COVİD-19
enfeksiyonu nedeniyle immün plazma uygulanan 130
hasta çalışmaya dahil edildi. Hastaların dosyaları ve
transfüzyon merkezi sisteminde kayıtlı olan bilgileri
değerlendirilerek araştırmacılar tarafından SPSS paket
programı kullanılarak analiz edildi.
Bulgular
İmmün plazma klinik uygulama kriterlerini sağlayan
130 hastaya 154 kez immün plazma transfüzyon
uygulaması yapıldı. Hastaların bir ya da birden fazla
kötü prognostik ölçüte sahip, orta ve ağır pnömoni
hastaları olduğu, ortalama 17,9 gün hastanede
yatarak tedavi gördüğü, %35,4’ünde sürecin ölümle
sonuçlandığı belirlendi. İmmun plazma transfüzyon
reaksiyonu sıklığı %1,95 olarak saptandı. Anti - A antikoruna
sahip hastalarda %23,1’inde sürecin ölümle
sonuçlandığı belirlendi.
Sonuç
İmmün plazma uygulanan bir veya daha fazla kötü
prognostik kritere sahip orta ve şiddetli pnömonili hastalar
hakkında veri sağlanmasının literatüre katkıda
bulunabileceği düşünülmektedir.
İNTRAPARENKİMAL KANAMALI HASTALARDA ASA SKORUNUN MORTALİTE ORANINA ETKİSİ
Authors: KANDEMİR Turan , ERCAN Serdar , ERTİLAV Kemal , ATAİZİ Zeki Serdar 
Published: February 2022

Amaç
İntraparenkimal hematom nedeniyle opere ettiğimiz
hastaların hematom hacimleri ve preoperatif ASA
skorlarının mortaliteye etkisini değerlendirmeyi amaçladık.
Gereç ve Yöntem
Çalışmamız hastanemiz Beyin ve Sinir Cerrahisi kliniğinde
Şubat 2015 - Şubat 2020 tarihleri arasında
intraparenkimal hematom nedeniyle opere edilen 34
hastanın dosyaları geriye dönük olarak taranması ile
yürütüldü. Hastaların preoperatif glaskow koma skoru,
hematom hacmi, antiagregan kullanımı, hipertansiyon
varlığı, kanamanın lokalizasyonu ve ventriküle
açılıp açılmadığı ve ASA skorları değerlendirilmek için
toplandı.
Bulgular
Çalışmaya dahil edilen 34 hastanın 20’i erkek 14’ü
kadın hastaydı. Hastaların geliş anındaki ortalama
hematom hacimleri 120cm3 ( min:41 – max: 278
cm3)’dü. Hastaların takiplerinde 28 tanesi ex olmuş
olup mortalite oranımız %82’dir. Hematom hacimleri
ile mortalite arasında anlamlı bir ilişki saptanmıştır
(P0.05).
Sonuç
Glaskow koma skoru ve ASA skoru mortaliteyi belirleyen
önemli faktörlerdir. Glaskow koma skoru ve ASA
skoru birlikte değerlendirilmelidir. Glaskow koma skoru
düşük bile olsa komorbid hastalıkları olmayan hastalarda
mortalite azalmaktadır.
QuakeLabeler: A Fast Seismic Data Set Creation and Annotation Toolbox for AI Applications
Authors: Mai Hao , Audet Pascal 
Published: February 2022

Abstract
The production and preparation of data sets are essential steps in machine learning (ML) applications. With the increasing volume and scale of available ML techniques in seismology, annotating seismograms or seismic features has become time consuming and tedious for many researchers. Furthermore, most methods train and validate on unique data subsets, which hampers independent performance evaluation and comparison. To address this problem, we have developed the software QuakeLabeler, an open-source Python package to customize, build, and manage earthquake training data sets, including processing and visualization. QuakeLabeler has tight pipeline functions, which include retrieving seismograms from multiple online data centers, querying online human-reviewed catalogs, signal processing, annotating (labeling), and analyzing data distribution. In addition, relevant statistical graphics and human-readable output files can be generated. Various file export formats are supported, such as Seismic Analysis Code (*.sac), mini Standard for Exchange of Earthquake Data (*.mseed), NumPy (*.npz), MATLAB (*.mat), and the Hierarchical Data Format version 5 (*.hdf5). This toolbox is packaged with an interactive command-line interface. Three alternative running modes (beginner, advanced, and benchmark) are implemented, intended to offer specific data set solutions for different types of applications, that is, quick-start recipes for simple ML solutions, advanced design for customized project training, and benchmark bulletins for model comparison.
Shear Bond Strength of Orthodontic Brackets Bonded with a Self-Adhering Composite in Dry and Saliva-Contaminated Conditions
Authors: Sharifi Nastaran , Mohammadi Zahra , Arab Sepideh , Shojaee Maryam , Vafadoost Fatemeh , Zakerzadeh Azadeh 
Published: February 2022

Objectives: The purpose of this study was to evaluate the effect of saliva contamination on shear bond strength (SBS) of orthodontic brackets bonded by a self-adhering composite compared with a conventional adhesive.
Materials and Methods: This in vitro, experimental study investigated 40 human premolars. The teeth were randomly divided into four groups based on the adhesive type and bonding condition: (I) Vertise Flow composite without saliva contamination (VF), (II) Vertise Flow composite with saliva contamination (VF/S), (III) Transbond XT composite without saliva contamination (TXT), and (IV) Transbond XT composite with saliva contamination (TXT/S). After the preparation step, brackets were bonded to the buccal surface of the teeth, and samples were mounted in acrylic blocks, incubated at 37°C for 24 hours, and underwent thermocycling between 5- 55°C. Next, the SBS was measured by a universal testing machine. Data were analyzed by ANOVA and Tukey’s test. P<0.05 was considered statistically significant.
Results: ANOVA showed a significant difference in SBS among the groups (P<0.001). The highest SBS was achieved in the TXT group (26.63±9.09 MPa), followed by TXT/S (13.69±4.23 MPa), VF/S (3.68±1.49 MPa), and VF (3.04±1.73 MPa).
Conclusion: Saliva contamination did not have a significant effect on SBS of brackets bonded with Vertise Flow. However, it did not provide acceptable bond strength for orthodontic bracket bonding in the clinical setting.