bluuebunny/crossref_metadata_2025_split huggingface dataset:
Clouds of Spacecraft Debris Liberated by Hypervelocity Dust Impacts on Parker Solar Probe
Authors: Malaspina David M. , Stenborg Guillermo , Mehoke Doug , Al-Ghazwi Adel , Shen Mitchell M. , Hsu Hsiang-Wen , Iyer Kaushik , Bale Stuart D. , Dudok de Wit Thierry 
Published: January 2022

Abstract
Hypervelocity impacts on spacecraft surfaces produce a wide range of effects including transient plasma clouds, surface material ablation, and for some impacts, the liberation of spacecraft material as debris clouds. This study examines debris-producing impacts on the Parker Solar Probe spacecraft as it traverses the densest part of the zodiacal cloud: the inner heliosphere. Hypervelocity impacts by interplanetary dust grains on the spacecraft that produce debris clouds are identified and examined. Impact-generated plasma and debris strongly perturb the near-spacecraft environment, producing distinct signals on electric, magnetic, and imaging sensors, as well as anomolous behavior of the star tracker cameras used for attitude determination. From these data, the spatial distribution, mass, and velocity of impactors that produce debris clouds are estimated. Debris-cloud expansion velocity and debris fragment sizes are constrained by the observational data, and long-duration electric potential perturbations caused by debris clouds are reported, along with a hypothesis for their creation. Impact-generated plasma-cloud expansion velocities, as well as pickup acceleration by the solar wind and driven plasma waves are also measured. Together, these observations produce a comprehensive picture of near-spacecraft environmental perturbations in the aftermath of a hypervelocity impact.
A Time-dependent Self-similar Reconstruction of Solar Coronal Mass Ejections Based on the Gibson–Low Model
Authors: Dai Xinghua 
Published: January 2022

Abstract
The analytic Gibson–Low (GL) model, a time-dependent self-similar solution of the magnetohydrodynamics, is first used to directly reconstruct a coronal mass ejection (CME) through the method of forward modeling in this study. A systematic description of the GL model is presented at the beginning, and a set of parameters is introduced to define the model. Then a CME on 2011 March 7 is reconstructed by fitting of GL (FGL) of the multi-viewpoint and time series observations. The first step of FGL is the initialization of the location and orientation of the GL using the information of the CME source region. The second step is to fit the parameters of size, shape, velocity, and strength of the magnetic field of the GL to the observations of coronagraphs at 20:24 and 20:39. The GL at 20:54 and 3 R
⊙ is generated through the theory of self-similar expansion respectively. Comparisons between the synthetic images of the GL and the real observations of the CME prove the performance of FGL that the reconstructions well match the observations.
Examining Two-dimensional Luminosity–Time Correlations for Gamma-Ray Burst Radio Afterglows with VLA and ALMA
Authors: Levine Delina , Dainotti Maria , Zvonarek Kevin J. , Fraija Nissim , Warren Donald C. , Chandra Poonam , Lloyd-Ronning Nicole 
Published: January 2022

Abstract
Gamma-ray burst (GRB) afterglow emission can be observed from sub-TeV to radio wavelengths, though only 6.6% of observed GRBs present radio afterglows. We examine GRB radio light curves (LCs) to look for the presence of radio plateaus resembling the plateaus observed at X-ray and optical wavelengths. We analyze 404 GRBs from the literature with observed radio afterglow and fit 82 GRBs with at least five data points with a broken power-law model, requiring four parameters. From these, we find 18 GRBs that present a break feature resembling a plateau. We conduct the first multiwavelength study of the Dainotti correlation between the luminosity L

a
and the rest-frame time of break T

a
* for those 18 GRBs, concluding that the correlation exists and resembles the corresponding correlation at X-ray and optical wavelengths after correction for evolutionary effects. We compare T

a
* for the radio sample with T

a
* values in X-ray and optical data, finding significantly later break times in the radio. We propose that this late break time and the compatibility in slope suggest either a long-lasting plateau or the passage of a spectral break in the radio band. We also correct the distribution of the isotropic energy E
iso versus the rest-frame burst duration T
*
90 for evolutionary effects and conclude that there is no significant difference between the T*90 distributions for the radio LCs with a break and for those without.
A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog
Authors: Chen Yan-Ping , Zaw Ingyin , Farrar Glennys R. , Elgamal Sana 
Published: January 2022

Abstract
We have constructed a catalog of active galactic nuclei (AGNs) with z < 0.13, based on optical spectroscopy, from the parent sample of galaxies in the Six-Degree Field (6dF) galaxy survey (Final Release of 6dFGS), a census of the Southern Hemisphere. This work is an extension of our all-sky AGN catalog in Zaw et al. (ZCF, hereafter). The ZCF is based on 43,533 galaxies with K
s ≤ 11.75 (z ≤ 0.09) in the Two Micron All-Sky Survey (2MASS) Redshift Survey (2MRS). The parent catalog of this work, the 6dF catalog, consists of 136,304 publicly available digital spectra for 125,071 galaxies with decl. ≤ 0° and K
s ≤ 12.65 (median z = 0.053). Our AGN catalog consists of 3109 broadline AGNs and 12,156 narrowline AGNs which satisfy the 2003 criteria, of which 3865 also satisfy the 2001 criteria. We also provide emission-line widths, fluxes, flux errors, and signal-to-noise ratios of all the galaxies in our spectroscopic sample, allowing users to customize the selection criteria. In addition, we provide the AGN likelihood for the rest of galaxies based on the availability and quality of their spectra. These likelihood values can be used for rigorous statistical analyses.
Acute Total Occlusion of the Left Circumflex Coronary Artery Presenting with Non-ST-segment Elevation Myocardial Infraction and Normal Electrocardiogram – A Case Report
Authors: Sihite Teddy Arnold , Hendrawansyah Sindy , Pranata Raymond 
Published: January 2022

Introduction
In this case report, we report a patient with non-ST-segment elevation myocardial infarction (NSTEMI), presenting with recurrent chest pain typical of angina, a very high troponin I level despite normal electrocardiogram (ECG). On angiography, it turns out that the patient has acute total occlusion in the left circumflex artery (LCx).
Case Report
A 56 years-old woman presented to the emergency department with chief complaint of recurrent chest pain typical of angina 20 hours before admission. Vital signs were within normal limit. There were no murmur, additional heart sounds, and no rales or crackles. The ECG showed normal sinus rhythm, and there were no ST-T changes on serial examination. The first and second cardiac enzymes troponin I was high (> 10 mg/L). Chest X-ray examination showed cardiomegaly without signs of lung edema. Patient was diagnosed with high risk NSTEMI, hypertensive heart disease, and diabetes mellitus. Coronary showed an acute total occlusion in the LCx, which is determined as the culprit lesion for the ongoing myocardial infarction. A drug-eluting stent was deployed at the culprit lesion and the coronary flow was TIMI Flow 3. There was non-significant stenosis at the mid-right coronary artery. The echocardiography showed reduced left ventricular systolic function (LVEF 50%) with hypokinetic inferior-septal and inferior-lateral segment base to apical. Post-procedural follow-up was uneventful.
Conclusion
One of the learning points is that ECG may fail to detect acute total occlusion and rise in troponin level, despite the absence of ST-T changes, warrant urgent invasive strategy.
STATISTICAL ANXIETY AND METACOGNITIVE AWARENESS LEVELS OF GRADUATE STUDENTS STUDYING IN MATHEMATICS EDUCATION PROGRAM
Authors: Altun Murat , Yılmaz Gül Kaleli , Demir Barış , Çelik Hülya Sert 
Published: January 2022

<p>Graduate students are faced with some difficulties in determining statistical methods to be used in their assignments and researches and this leads to anxiety in them. In this study, it was aimed to examine the relationships between statistical anxiety and metacognitive awareness levels of graduate students studying in the field of mathematics education and to compare these levels in terms of some variables. The research study group consists of 101 students studying at the master's and doctorate levels in the department of mathematics education and participated in the research voluntarily. As a data collection tool in the research, Statistical Anxiety Scale (SAS) and Metacognitive Awareness Scale (MCAS) were used. In the analysis of the data, descriptive statistics, t-test, ANOVA and Correlation Coefficient were used. According to the research results, it was determined that there is a negative and moderately significant relationship between statistical anxiety and metacognitive awareness levels of graduate students studying in the field of mathematics education. As a result of the analyzes, it was observed that the statistical anxiety and metacognitive awareness of the students were high, the statistical anxiety and metacognitive awareness levels differed statistically according to the variables of graduate education level and stage of graduate education, but did not differ significantly according to the variables of gender and taking statistics course. </p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0984/a.php" alt="Hit counter" /></p>
TEACHERS' VIEWS ON THE EVALUATION OF LITERACY TEACHING DURING THE COVID-19 PANDEMIC
Authors: Demirci Cavide , Doğaner Emine Şenay , Kılıçaslan Hüseyin 
Published: January 2022

<p>At the end of 2019, the coronavirus, which affected the whole world, started to spread in Turkey with the first cases seen as of March. With the spread of the virus, almost all public and private institutions and organizations have taken some precautions. In this process, the Ministry of National Education has also taken some measures within its own body. Most of the second semester of the 2019-2020 academic year was carried out with distance education. At the beginning of the new academic year, although the schools remained open from time to time, they were closed most of the year and the studies were carried out remotely. In the 2020-2021 academic year, first-year students also learned to read and write for the first time through distance education, although there was no such experience before. In the study, the views of teachers on primary literacy teaching during the epidemic period were examined. In this context, the aim of the research is to determine the opinions of the teachers about the first literacy teaching carried out with distance education activities during the epidemic period. The research was carried out with 10 teachers who experienced literacy teaching during the epidemic period, and the data obtained were subjected to content analysis. According to the findings of the study, connection problems, problems in family communication, and wrong intervention of families in the process were identified as problems. The opportunity to work one-on-one with students is seen as the advantage of this process. Teachers used web 2.0 tools, presentations, different platforms. Although a target close to face-to-face has been achieved in reading teaching, it has not been successful at the same rate in writing teaching. The teachers carried out the process by using student-centered methods and techniques such as gamification and individual teaching.</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0958/a.php" alt="Hit counter" /></p>
UN OUTIL MÉTHODOLOGIQUE POUR L’APPROCHE DE LA FORMATION DES ÉLÈVES DES ÉCOLES PILOTES EN TUNISIE / A METHODOLOGICAL TOOL FOR THE TRAINING APPROACH OF STUDENTS IN PILOT SCHOOLS IN TUNISIA
Authors: Medi Mabrouk 
Published: January 2022

<p>Notre étude s'intéresse à la production d’un outil méthodologique pour l’approche de fonctionnement de la formation des élèves des écoles pilotes dans le système scolaire en Tunisie. Donc dans cet article on va essayer de répondre aux questions suivantes : Comment fonctionne les lycées pilotes ? Quels problèmes psychologiques ce système compétitif pourrait générer chez les élèves ? Quels problèmes rencontrent les chefs de ces établissements pour gérer ces problèmes ? Comment les enseignants exerçant dans les lycées et collègues perçoivent-ils les problèmes psychopédagogiques et didactiques génèrent par ce système et quelles solutions proposent-ils pour les dépasser ? À cette fin, un questionnaire a été remis aux anciens élèves et des entretiens ont été menés avec les directeurs et les enseignants de ces écoles pilotes.</p><p> </p><p>Our study is interested in the production of a methodological tool for the operational approach to the training of students in pilot schools in the school system in Tunisia. So, in this article we will try to answer the following questions: How do the pilot high schools work? What psychological problems might this competitive system generate in students? What problems do the heads of these schools have in dealing with these problems? How do teachers in the schools perceive the psychological and didactic problems generated by this system and what solutions do they propose to overcome them? To this end, a questionnaire was given to former students and interviews were conducted with the principals and teachers at these pilot schools.</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0971/a.php" alt="Hit counter" /></p>
THE MEDIATING EFFECT OF RELATIONSHIP MARKETING STRATEGY BETWEEN DIGITAL MARKETING STRATEGY AND CONSUMERS’ PURCHASE DECISIONS IN THE AUTOMOTIVE INDUSTRY IN MALAYSIA
Authors: Kanapathipillai Kumaran , Kumaran Sharvena 
Published: January 2022

<p>The intent of this research is to scrutinise the impact of digital marketing strategies applied by marketers in the automotive industry in Malaysia in aiding consumers to make purchase decisions. In reality, marketers know that digital marketing strategies alone will not lead to consumers’ purchase decisions because not all consumers can be motivated by digitalisation. Another significant factor in influencing consumers’ purchase decisions is relationship marketing strategies. Therefore, the interceding impact of relationship marketing strategy between digital marketing strategy and consumers’ purchase decisions was analysed in this study to support the research hypothesis. A total of 605 marketers employed in the automotive industry furnished the data for this study. Moreover, in-depth literature was reviewed to expose the association between digital marketing strategies, relationship marketing strategies, and consumers’ purchase decisions. The findings of this research indicated a statistically significant relationship between digital marketing strategy and relationship marketing strategy as well as consumers’ purchase decisions. Conclusively, the hypothesis is supported by data and illustrated that relationship marketing strategy statistically mediates the relationship between digital marketing strategy and consumers’ purchase decisions in the automotive industry in Malaysia. Furthermore, this research also proves that marketers who utilise all avenues of digital marketing strategies will be able to communicate and build a robust relationship with consumers, which leads to positive consumers’ purchase decisions. In conclusion, digital marketing strategies with the interceding relationship marketing strategies can influence consumers to make a favourable purchase decision that benefits marketers, consumers, and the automotive industry in Malaysia.</p><p> </p><p>JEL: M10; M30; M31; L62</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0974/a.php" alt="Hit counter" /></p>
FACULTY OF SPORTS SCIENCES STUDENTS’ LEARNING LEVELS OF THE PRACTICAL COURSES DURING THE PANDEMIC PERIOD
Authors: Kaya Mustafa , Çırçır Alperen , Eyinç Alper , Kargün Mehmet , Bozdemir Recep 
Published: January 2022

<p>This research was carried out to analyze the attitude and learning levels of the Faculty of Sport Sciences students related to the practical courses lectured in distance education due to the isolation days. This research was taught to examine the attitudes of the sports sciences faculty coaching education department towards the applied lessons taught in distance education from the meal isolation days. The sample group of the study included totally 460 students including 233 females and 227 males studying at the Sport Sciences Faculties of universities in 2020-2021 Academic Year. The demographic properties of the students participating into the study such as the variables of gender, grade and department were recorded. Furthermore, 4 questionnaire questions with "yes” or "no" answers prepared by the researcher and a 10-item questionnaire for questioning the students' attitudes towards learning in practical courses lectured in distance education were created. The statistical values were calculated in SPSS program. The arithmetic average and standard deviation values of the obtained data were calculated. The Chi-Square Test (x2) was performed to determine whether the department and grade variables had a significant effect upon the answers given to the attitude questions. In conclusion, it was determined that the practical courses lectured in distance education in Faculty of Sports Sciences negatively affected the learning levels of students during the pandemic caused by the Covid-19 virus. </p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0915/a.php" alt="Hit counter" /></p>
INVESTIGATION OF THE EFFECT OF FOOT TRAINING USING THE AGILITY LADDER ON DRIBBLING SKILLS IN FOOTBALL
Authors: Tiryaki Ersin , Akcan Fırat 
Published: January 2022

<p>The aim of this study is to investigate the effect of agility ladder using foot movements on the dribbling skill in football. 48 person aged between 8 and 15 were included in the study as a voluntary basis. A total of 4 groups were formed from the volunteers: 8-11 ages control (n=12), 8-11 ages experimental groups (n=12), 12-15 ages control (n=12) and 12-15 ages experimental groups (n=12). The training program was applied to children studying in football schools during the year. Before the normal training programs, specially planned agility ladder exercises were performed for 8 weeks, twice a week, for the athletes in the experimental group. Only normal football training program were performed to the control group. The zigzag-dribbling test was applied before and after the 8-week training program to determine the dribbling speed and skills of the volunteers. The obtained data were analyzed using the SPSS 20 package program. Paired Samples T Test was used in the analysis of the pretest-posttest data applied to the groups, since it showed normal and homogeneous distribution. One Way ANOVA test was applied to the data sets showing normal and homogeneous distribution between the groups, and Tukey HSD test was used to determine the significance in which group. As a result of the analysis of the data obtained, there was no statistically significant difference between the pre-test and post-test results of the control groups, while a statistically significant difference was found between the pre-test and post-test results of the experimental groups. When the pre- and post-test results between the groups were compared, a statistically significant difference was found between the control group and the experimental group in favor of the experimental groups. As a result, it can be said that agility ladder training contributes to the development of dribbling skills of children in the lower age group.</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0953/a.php" alt="Hit counter" /></p>
TEACHING SUBJECTS AND PARTICIPATION RATES IN PHYSICAL EDUCATION COURSES AMONG CHILDREN AGED 10 TO 12 YEARS
Authors: Tambalis Konstantinos D. , Arnaoutis Giannis , Sidossis Labros S. 
Published: January 2022

<p>Physical activity (PA) is a parameter of children's life that is straight connected to the benefits of their life (protection against obesity, better psychological profile, and predisposition for increased levels of PA as adult etc.). The purpose of the present study was to evaluate parameters of PA during Physical Education (PE) classes and to explore the subjects that the children participate in the PE course. PA, PE, and sedentary behaviors were assessed by a self-administrated PA checklist, proper for children. Body mass index (BMI) was calculated from measured body weight and height. A representative sample of Greek boys and girls aged 10 to 12 years (N=3195) participated in the study. Results showed that boys had higher levels of total and vigorous-intensity PA (VPA), than girls (all p-values&lt;0.05), while girls presented higher light-to-moderate intensity PA as compared to boys. In those days that students participated in PE classes, total PA and VPA were higher in comparison with days didn't, in both sexes (p&lt;0.001), while, a greater proportion of children met the current recommendations for PA (86.1% vs. 69.1% for boys and 68.4% vs. 53.5% for girls). During PE classes, boys participated in a greater proportion than girls in basketball and soccer (all p-values&lt;0.05), while, more girls in comparison to boys participated in volleyball, dance, and jump-rope (all p-values&lt;0.05). Stratified data analysis by BMI category among children who participated in PE classes did not reveal significant differences in time participated in PE components among categories, except for games (e.g. chase, tag) among boys. In conclusion, boys have higher levels of total PA than girls, while, it seems that school and PE classes play a significant role in students' levels of PA which could grow up further with interventions as the increase of hours in PE lessons.</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0992/a.php" alt="Hit counter" /></p>