bluuebunny/crossref_metadata_2025_split huggingface dataset:
تأثير استخدام أنموذج التعلم البنائي في التحصيل المعرفي وتعلم مهارة الدحرجة بكرة القدم لطلاب الصف الثاني متوسط
Authors: Naif Ali Salal , Atia Muhameed Abdul Hussein 
Published: August 2020

تكمن اهمية البحث في تأثير استخدام انموذج التعلم البنائي في تنمية التحصيل المعرفي وتعلم مهارة الدحرجة بكرة القدم لطلاب الصف الثاني متوسط و تطرق الباحثان الى مشكلة البحث من خلال الطريقة المتبعة من قبل المدرس و القائمة على أساس الإمتثال و العمل وفق للأنموذج المتبع (الأسلوب الأمري)، فضلاً عن قلة الإهتمام بالجانب النظري في درس التربية الرياضية لا تتماشى وما يمر به عصرنا اليوم من تطور معرفي الأمر الذي يتطلب البحث و التفتيش عن نماذج وإستراتيجيات للتعلم أكثر تطوراً (كأنموذج التعلم البنائي) وكان الهدف من البحث هو التعرف على تأثير استخدام أنموذج (التعلم البنائي) في التحصيل المعرفي وتعلم مهارة الدحرجة بكرة القدم لطلاب الصف الثاني متوسط، واستخدم الباحثان التصميم التجريبي ذات المجموعتين المتكافئة ( التجريبية والظابطة) ذات الأختبار القبلي والبعدي لملائمته لطبيعة مشكلة البحث وأهدافه ، وتم تطبيق مفردات البحث على عينة البحث البالغ عددها (30) طالبا، اختير منهم (10) طلاب للتجربة الأستطلاعية ، وقسم الطلاب المتبقين والبالغ عددهم (20) طالبا على مجموعتين احدهما تجريبية تتألف من (10) طلاب والأخرى ضابطة تتألف من (10) طلاب أيضاً، و نفذت كل مجموعة (التجريبية والظابطة) منهجها التعليمي كلأتي المجموعة التجريبية بأنموذج التعلم البنائي المجموعة الظابطة الطريقة التقليدية المتبعة من قبل مدرس التربية الرياضية والبدنية، واستغرقت الدراسة ثمانية أسابيع وتضمنت وحدتين تعليميتين في الأسبوع الواحد لكل مجموعة، زمن الوحدة التعليمية (45) دقيقة. وأستخدم الباحثان الحقيبة الأحصائية (SPSS) وبعض القوانين الأحصائية في تحليل البيانات، وتوصل الباحثان الى العديد من الأستنتاجات وكان أهمها إنّ لإستعمال انموذج التعلم البنائي أثر فعَّال في تنمية التحصيل المعرفي وتعلم مهارة الدحرجة بكرة القدم لدى طلاب الصف الثاني متوسط.
High-cadence Dispersed Spectral Analysis of Supernova Remnant 1987A
Authors: Bray Evan , Burrows David N. , Park Sangwook , Ravi Aravind P. 
Published: August 2020

Abstract
We present an analysis of the dispersed spectral data from 11 epochs (2011 March–2018 September) of supernova remnant (SNR) 1987A observations performed with Chandra. These observations were performed with the High Energy Transmission Grating (HETG) as part of our ongoing Chandra monitoring campaign of SNR 1987A, whose first-order dispersed spectrum provides a significantly greater energy resolution than the previously published zeroth-order spectrum. Our data sets with moderate exposure times of ∼50–70 ks per epoch cover the time period between deep Chandra HETG observations (with individual exposures >∼200 ks) taken in 2011 March and 2018 March. These data have a much higher cadence than the widely spaced deep high-resolution spectra, at the expense of total exposure time. While statistical uncertainties are large due to low photon count statistics in the observed first-order spectra, we find that spectral model parameters are generally in line with the shock wave propagating into the medium beyond the dense inner ring, as suggested by Frank et al. (2016). As the reverse shock begins ionizing the heavier elements of the supernova ejecta interior to the equatorial ring, spectral fit parameters are expected to change as the chemical makeup and physical properties of the shocked gas evolve. Based on our broadband spectral model fits, we find that abundance values appear to be constant in this time period. While our results are somewhat limited due to photon statistics, we demonstrate the utility of the dispersed HETG spectral analysis that can be performed with our regular Chandra monitoring observations of SNR 1987A.
Electromagnetic Ion–Ion Instabilities in Space Plasmas: Effects of Suprathermal Populations
Authors: Shaaban S. M. , Lazar M. , López R. A. , Poedts S. 
Published: August 2020

Abstract
In collision-poor plasmas from space, three distinct ion–ion instabilities can be driven by the proton beams streaming along the background magnetic field: left-hand resonant, nonresonant, and right-hand resonant instabilities. These instabilities are in general investigated considering only idealized proton beams with Maxwellian velocity distributions, and ignoring the implications of suprathermal populations, usually reproduced by the Kappa power laws. Moreover, the existing theories minimize the kinetic effects of electrons, assuming them isotropic and Maxwellian distributed. In an attempt to overcome these limitations, in the present paper we present the results of an extended investigation of ion–ion instabilities, which show that their dispersion and stability properties (e.g., growth rates, wave frequencies, and the unstable wavenumbers) are highly sensitive to the influence of suprathermal populations and anisotropic electrons. These results offer valuable explanations for the origin of the enhanced low-frequency fluctuations, frequently observed in space plasmas and associated with proton beams.
Extracting the Cold Neutral Medium from H i Emission with Deep Learning: Implications for Galactic Foregrounds at High Latitude
Authors: Murray Claire E. , Peek J. E. G. , Kim Chang-Goo 
Published: August 2020

Abstract
Resolving the phase structure of neutral hydrogen (H i) is crucial for understanding the life cycle of the interstellar medium (ISM). However, accurate measurements of H i temperature and density are limited by the availability of background continuum sources for measuring H i absorption. Here we test the use of deep learning for extracting H i properties over large areas without optical depth information. We train a 1D convolutional neural network using synthetic observations of 3D numerical simulations of the ISM to predict the fraction (

) of cold neutral medium (CNM) and the correction to the optically thin H i column density for optical depth (

) from 21 cm emission alone. We restrict our analysis to high Galactic latitudes (

), where the complexity of spectral line profiles is minimized. We verify that the network accurately predicts

and

by comparing the results with direct constraints from 21 cm absorption. By applying the network to the GALFA-H i survey, we generate large-area maps of

and

. Although the overall contribution to the total H i column of CNM-rich structures is small (∼5%), we find that these structures are ubiquitous. Our results are consistent with the picture that small-scale structures observed in 21 cm emission aligned with the magnetic field are dominated by CNM. Finally, we demonstrate that the observed correlation between H i column density and dust reddening (

) declines with increasing

, indicating that future efforts to quantify foreground Galactic

using H i, even at high latitudes, should increase fidelity by accounting for H i phase structure.
On the Production of He+ of Solar Origin in the Solar Wind
Authors: Rivera Yeimy J. , Landi Enrico , Lepri Susan T. , Gilbert Jason A. 
Published: August 2020

Abstract
Solar wind measurements in the heliosphere predominantly comprise protons, alphas, and minor elements in a highly ionized state. The majority of low-charge states, such as He+, measured in situ are often attributed to pick-up ions of nonsolar origin. However, through inspection of the velocity distribution functions of near-Earth measurements, we find a small but significant population of He+ ions in the normal solar wind whose properties indicate that it originated from the Sun and has evolved as part of the normal solar wind. Current ionization models, largely governed by electron impact and radiative ionization and recombination processes, underestimate this population by several orders of magnitude. Therefore, to reconcile the singly ionized He observed, we investigate the recombination of solar He2+ through charge exchange with neutrals from circumsolar dust as a possible formation mechanism of solar He+. We present an empirical profile of neutrals necessary for charge exchange to become an effective vehicle to recombine He2+ to He+ such that it meets observational He+ values. We find that the formation of He+ is not only sensitive to the density of neutrals but also to the inner boundary of the neutral distribution encountered along the solar wind path. However, further observational constraints are necessary to confirm that the interaction between solar α particles and dust neutrals is the primary source of the He+ observations.
The R-Process Alliance: Fourth Data Release from the Search for R-process-enhanced Stars in the Galactic Halo*
Authors: Holmbeck Erika M. , Hansen Terese T. , Beers Timothy C. , Placco Vinicius M. , Whitten Devin D. , Rasmussen Kaitlin C. , Roederer Ian U. , Ezzeddine Rana , Sakari Charli M. , Frebel Anna , Drout Maria R. , Simon Joshua D. , Thompson Ian B. , Bland-Hawthorn Joss , Gibson Brad K. , Grebel Eva K. , Kordopatis Georges , Kunder Andrea , Meléndez Jorge , Navarro Julio F. , Reid Warren A. , Seabroke George , Steinmetz Matthias , Watson Fred , Wyse Rosemary F. Ġ. 
Published: August 2020

Abstract
This compilation is the fourth data release from the R-Process Alliance (RPA) search for r-process-enhanced stars and the second release based on “snapshot” high-resolution (R ∼ 30,000) spectra collected with the du Pont 2.5 m Telescope. In this data release, we propose a new delineation between the r-I and r-II stellar classes at

, instead of the empirically chosen

level previously in use, based on statistical tests of the complete set of RPA data released to date. We also statistically justify the minimum level of [Eu/Fe] for definition of the r-I stars, [Eu/Fe] > +0.3. Redefining the separation between r-I and r-II stars will aid in the analysis of the possible progenitors of these two classes of stars and determine whether these signatures arise from separate astrophysical sources at all. Applying this redefinition to previous RPA data, the number of identified r-II and r-I stars changes to 51 and 121, respectively, from the initial set of data releases published thus far. In this data release, we identify 21 new r-II, 111 new r-I (plus 3 re-identified), and 7 new (plus 1 re-identified) limited-r stars out of a total of 232 target stars, resulting in a total sample of 72 new r-II stars, 232 new r-I stars, and 42 new limited-r stars identified by the RPA to date.
Uso de la tecnología digital (TIC) en el proceso de enseñanza aprendizaje en la escuela académico profesional de tecnología médica de la UNMSM. Año 2014
Authors: Huaraz Loyola Frida Libertad 
Published: August 2020

OBJETIVO: La presente investigación permitió determinar en qué medida el docente de la E.A.P. de Tecnología Médica hace uso el uso de la Tecnología Digital en el proceso de enseñanza aprendizaje. METODOLOGÍA: Es no experimental transversal­descriptivo correlacional. La población conformada por 71 docentes que desarrollaron actividades académicas el 2014, considerándose, como muestra, el mismo nú mero de docentes. Con el análisis estadístico se determina que hay 59.2% profesores y 40.8% profesoras. Los docentes usan casi siempre las herramientas como el Hardware, Software y telemática. En el trabajo docente, las TIC, influyen significativamente en cambio la actitud del docente, no influye sobre el proceso de enseñanza aprendizaje. Una buena formación en las TIC permite al docente desarrollar una buna didáctica en el proceso de EA. RESULTADOS: Según los resultados, se observa que Los docentes de la E.A.P. de Tecnología Médica están medianamente capacitados en el uso de la tecnología.
Aislamiento de candida albicans en la cavidad oral en los niños en edad escolar de la zona urbana del municipio de Chaguaní – Cundinamarca y variables asociadas a sintomatología
Authors: Guatibonza Andrea Milena , Giraldo Julio Cesar , Gutiérrez Elizabeth , Ricaurte Laura Alejandra 
Published: August 2020

La candidiasis oral se ha considerado como una de las infecciones más frecuentes en la cavidad bucal, la cual es atribuida a Candida albicans en la mayoría de los casos y en los niños generalmente cursa de manera asintomática. OBJETIVO: Identificar las posibles variables asocia­ das a la sintomatología correspondiente a candidiasis oral presentada en niños en edad pre­ escolar y escolar. METODOLOGÍA: Se incluyeron 99 muestras de ni­ ños en edad pre­escolar y escolar cuyos padres asin­ tieron participar voluntariamente con la firma de un asentimiento informado y el diligenciamiento de una encuesta epidemiológica, el aislamiento y caracterización bioquímica se realizó empleando las técnicas de siembra en Agar OGY, Microcultivo en agar harina de maíz para la formación de Clamidosporas, técnica de producción de tubo germinal en suero humano y prueba de urea. Para la valoración de sensibilidad y/o resistencia, se emplearon diez tipos de enjuagues bucales comerciales impregnados en sensidiscos. Finalmente se realizó el análisis estadístico utilizando el programa SPSSv2.0 en el cual se calculó las posibles asociaciones con las variables evaluadas. RESULTADOS: Arrojaron una prevalencia del 67,7%(67/99) para Candida albicas, de los cuales el 38.8%(26/67) y 43,2%(29/67) correspondió al género masculino y femenino respectivamente, cuyas edades oscilaron de cero a doce años. La sensibilidad como la resistencia para los enjuagues evaluados fue del 50% respectivamente. La variable que se identificó con posible asociación con sintomatología, fue dolor en las encías, valor de P = 0,005. Otras afecciones de la cavi­ dad oral como la caries dental, puede estar relacionada con la presencia de Candida albicans
Pilot Study to Measure Deficits in Proprioception in Children With Somatodyspraxia
Authors: Tong Chu Virginia Way 
Published: August 2020

AbstractImportance: Given the importance of proprioception in motor coordination, the identification of sensory deficits contributing to motor challenges is crucial for appropriate intervention; however, objective proprioceptive tests are not currently available in pediatric clinical practice.Objective: To pilot test methods for assessing proprioception in children. Children with somatodyspraxia were predicted to have reduced proprioceptive awareness compared with age-matched control children.Design: Observational study.Setting: Individual clinic.Participants: Ten children identified as having somatodyspraxia and 10 typically developing children, ages 6–8 yr.Outcomes and Measures: Spatial awareness and force perception were assessed by having the children match arm positions and grip and pinch forces using electronic dynamometers.Results: All children were able to complete the proprioceptive assessments. Of those identified as having somatodyspraxia, 90% showed deficits in at least one area of proprioception. Children with somatodyspraxia performed more poorly on spatial awareness and force perception tests than typically developing children (p &lt; .05).Conclusions and Relevance: Children with dyspraxia have difficulties with spatial awareness and force perception, confirming a somatosensory contribution to dyspraxia.What This Article Adds: This article presents a framework and methods to measure proprioception in children. These methods will allow occupational therapy practitioners to quantify the proprioceptive deficits common in children with dyspraxia.
Exilios impropios y peregrinación profana: Juan José Saer y Witold Gombrowicz
Authors: Maranguello Carolina 
Published: August 2020

Después de haberse mudado a Francia en 1968 y de haber escrito gran parte de su obra en el extranjero, Juan José Saer comienza a regresar periódicamente a la Argentina a partir de los ochenta, y escribe a propósito del regreso y del exilio una serie de textos en los que alude a la figura de Witold Gombrowicz. En este trabajo se indagarán los vínculos, correspondencias y divergencias entre ambos. Como se verá, Saer ubica a Gombrowicz en dos series de viajeros e intelectuales. Por un lado, una serie anacrónica e intemporal que lo relaciona con viajeros de épocas disímiles y en la cual se destaca su singular percepción del paisaje nacional; por el otro, una serie histórica que devuelve al escritor polaco a las rivalidades literarias de su época (Borges, Caillois y el grupo Sur). Cada una de estas inscripciones abre una sugerente contemporaneidad entre las poéticas y los exilios impropios de Saer y Gombrowicz. La “perspectiva exterior” de este último le permitirá a Saer radicalizar una figura de escritor exiliado y excéntrico capaz de resistir tanto los “infalibles” valores de Europa como los deberes de identificación nacional; y configurar además formas disruptivas de percibir el paisaje de la zona en sus regresos al país.
Current evidence between hospital volume and perioperative outcome: Prospective assessment of robotic radical prostatectomy safety profile in a regional center of medium annual caseload
Authors: Ferrari Matteo , Mazzola Brunello , Roggero Enrico , D'Antonio Eugenia , Pereira Mestre Ricardo , Porcu Giovanni , Stoffel Flavio , Renard Julien 
Published: August 2020

Introduction: We aimed to present the safety profile of robotic radical prostatectomy (RARP) performed in a single center of medium surgical volume since its introduction and identify predictors of postoperative complications.
Methods: We prospectively collected clinical data from 317 consecutive patients undergoing RARP between August 2011 and November 2019 in a medium-volume center. Surgical procedures were performed by a single experienced surgeon. Complications were collected according to the Martin criteria for reporting and the Clavien-Dindo classification for rating. Preoperative, intraoperative, and postoperative data were analyzed and compared with available literature.
Results: A total of 102 complications were observed in 96 (30.3%) patients and were minor in 84.4% of cases (Clavien grade 1 and 2). Transfusion rate was 1.3%. Complications of grade 4b or 5 did not occur. The most frequent complications were urinary retention (7.3%) and anastomotic leak (5.9%). At multivariate analysis, the nerve-sparing technique was an independent predictor of complications (odds ratio [OR] 0.55; p=0.02).
Conclusions: The study shows that a high safety profile may be achieved in a medium-volume hospital. The nerve-sparing technique was a predictor of complications. Further studies are needed to define the current relationship between surgical volume and perioperative outcome for RARP.
Single-night stay for open radical prostatectomy
Authors: Nason Gregory J. , Kim J.K. , Tan G.H. , Ajib K. , Nam Robert K. 
Published: August 2020

Introduction: The aim of this study was to assess the effect of an enhanced care pathway on length of stay for open radical prostatectomy (RP) given that robotic-assisted laparoscopic prostatectomy (RALP) is not available to all patients in Canada.
Methods: A retrospective review was performed of all RPs performed. An enhanced care pathway was established for RPs in 2011. Patients were compared in the period before (2005–2010) and after (2011–2019) the introduction of the pathway.
Results: During the study period, 581 RPs were performed by a single surgeon with a median followup of 66.9 months (range 3–176). A total of 211 (36.3%) RPs were performed from 2005–2010, while 370 (63.9%) were performed from 2011–2019. The median age at RP was 65 years (range 44–81). Following the introduction of an enhanced care pathway, there were significant decreases in intraoperative blood loss (350 ml vs. 200 ml; p=0.0001) and the use of surgical drains (90% vs. 9.5%; p=0.0001). The median length of stay (LOS) over the whole study period was one day (range 1–7), which significantly decreased with the enhanced care pathway (three days vs. one day; p=0.0001). Since introducing the enhanced care pathway in 2011, 344 (93%) patients were discharged day 1 following surgery. There were no differences in post-discharge presentations to the emergency department (5.7% vs. 9%; p= 0.15) or 30-day readmission rates (3.8% vs. 3.8%; p=1.00).
Conclusions: A single-night stay for open RP is safe and achievable for most patients. A dedicated, multifaceted pathway is required to attain targets for a safe and timely discharge.
Selected Topics on Complex Systems Informatics: Editorial Introduction to Issue 23 of CSIMQ
Authors: Sandkuhl Kurt 
Published: August 2020

Complex systems and their analysis, construction, management or application are the motivation of all articles in this issue of CSIMQ. Different perspectives exist on what actually causes “complexity” in systems. In systems theory, a widely spread view is that complex systems have many components with emergent behavior, i.e. the large number and the dynamics of components are decisive. In business informatics, the complexity of information systems is attributed to their socio-technical nature, which acknowledges the interaction between the human actors and the information technology in an enterprise. Understanding the context of complex systems or their components is supported by modeling and is a key aspect of preparing organizational solutions. Models do not remove the complexity of the real world but help to understand it and to design and develop solutions. All articles in this issue are in some respect concerned with models or modeling. The articles also reflect recent trends in industry and society, such as digital transformation and applications of artificial intelligence, and show that these trends will not necessarily reduce complexity in systems but rather require the combination of proven approaches, such as modeling, and new methods for managing this complexity.
Evaluation of the P16INK4a Expression in Cervical Biopsy Specimen SBMCH
Authors: Aggarwal Amish , Venkatraman I. , Prabakaran M. 
Published: August 2020

In early 1980 human papillomavirus (HPV) were the risk factor and most commonly affects younger women. Many test have developed since then and among that a biomarker test system have developed and clinically evaluated. P16INK4a is used as an important marker for indicating neoplastic transformation for cervical dyplasia. This study was done to evaluate the P16INK4a expression in cervical biopsy in 50 cases. Two cases were identified a P16INK4a positive and remaining 48 didn’t show P16INK4a expression proving the hypothesis that p16INK4a is capable of showing the dysplasia positive cases.