bluuebunny/crossref_metadata_2025_split huggingface dataset:
تأثير استراتيجية البيت الدائري في التحصيل المعرفي والاحتفاظ بمادة طرائق تدريس التربية الرياضية وتنمية الاتجاه نحوها لدى طلاب كلية التربية الرياضية
Authors: عز الدين مؤيد كمال الدين 
Published: February 2021

مشكلة البحث تحددت في السؤال الاتي ما تأثير استراتيجية البيت الدائري في تحصيل مادة طرائق التدريس والاحتفاظ بها وتنمية الاتجاه نحوها لدى طلاب كلية التربية الرياضية، هدف البحث هو الكشف عن تاثير استراتيجية البيت الدائري في التحصيل المعرفي والاحتفاظ بها وتنمية الاتجاه نحوها لدى طلاب كلية التربية الرياضية، منهج البحث وعينته وادواته استخدم الباحث المنهج التجريبي، فيما مثلت عينة البحث (60) طالبا موزعين على مجموعتين تجريبية وضابطة، واستخدم الباحث الاختبار التحصيلي المعد من قبل ملا عبيده كما قام الباحث باستخدام مقياس للاتجاه نحو مادة طرائق تدريس التربية الرياضية، وتوصل الباحثهم الاستنتاجات ان استراتيجية البيت الدائري تفوقت على الاسلوب المتبع في متوسط التحصيل لطلاب المرحلة الثالثة في كلية التربية الرياضية في مادة طرائق تدريس التربية الرياضية.
تأثير تمرينات خاصة بواسطة جهاز تدريبي مقترح لتحسين زاوية ميل الجسم لمرحلتي الانطلاق وتزايد السرعة والانجاز في ركض 100م تحت 18 سنة
Authors: داود عبد الخالق , محمود احمد ناجي 
Published: February 2021

أن العديد من العوامل التي تؤدي دوراً مهماً في تحقيق الإنجاز الجديد العدو (100) م و التي تستوجب من المهتمين والباحثين والقائمين بعملية التدريب دراستها لأجل تحديدها بشكل رئيسية وتعزيز دورها وأهميتها في الإنجاز ليتم التأكيد عليها من خلال التدريب، ومن خلال إطلاع الباحث و الالتقاء بمعظم مدربي القطر لألعاب الساحة والميدان ولاسيما مدربي الركض السريع لم يحصل على أي بيانات خاصة للرياضيين العراقيين في التحليل الحركي لمعرفة التفاصيل الحقيقية على مسار مسافة ركض (100) م و الوقوف على نقاط الضعف الواضحة في مراحل رد الفعل، التعجيل، السرعة القصوى، مطاولة السرعة لدى عدائي العراق مقارنة مع أبطال العالم في فعالية (100)م والذي يتراوح بين أعشار الثانية وهي زمن قصير جدا ولكن قياسيا بانجاز العالمي يضعنا في عزات متأخرة بالنسبة للعالم و اسيا والعرب. لاحظ الباحثان من خلال عمله كونه احد مدربي العاب القوى للمنتخب الوطني توجد مشكله في بداية الـ 100 متر وبالخصوص ميلان الجسم في مرحلتي الانطلاق ومرحلة تزايد السرعة كون هذه المراحل هي من اهم مراحل ال 100 متر وهي التي يحسم من خلالها السباق كون سباق ال 100 متر يتعامل بأجزاء الثانية مما يجعل الأهمية الكبرى تكون في مرحلتي الانطلاق وتزايد السرعة . وهدفت دراسة البحث الى التعرف على تأثير التمرينات المعدة بواسطة جهاز ليزري لتحسين زاوية ميل الجسم خلال مرحلتي الانطلاق ومرحلة تزايد السرعة لرياضي الفعالية 100م للناشئين. فقد استخدم الباحثان المنهج التجريبي ذا المجموعة الواحدة، وحدد عينة البحث بالطريقة العمدية التي شملت لاعبي المدرسة التخصصية للألعاب القوى , اذ تم تطبيق المنهج التدريبي الذي استمر لمدة (6) أسابيع بواقع (3) وحدات تدريبية بأسلوب التدريب التكراري، باستخدام الأدوات المساعدة, وبعد الحصول على النتائج الخام تم معالجتها إحصائياً. واستنتج الباحثان أن تمرينات على الجهاز المقترح أدى إلى تطور زوايا البدء وأثبت كفاءته وأهميته . وإن التمرينات على الجهاز باختلاف الزوايا ومسافاتها وارتفاعاتها آثرت ايجابياً في تنمية بعض الصفات البدنية تصاحبها تغيرات البايوكينماتيكية وتطوير الانجاز لدى أفراد عينة البحث .
تأثير الألعاب الصغيرة على تعلم مهارتي الارسال من الأعلى واستقبال الارسال في الكرة الطائرة لطلاب المرحلة المتوسطة
Authors: شهاب عدي جميل , عبد الكريم خلود لايذ 
Published: February 2021

إن الالعاب الصغيرة في درس التربية الرياضية تتميز بأهمية كبيرة لما تحققه من فوائد جمه للطالب في الجوانب كافة لتكوين قاعدة صلبة البنيان والذي ينعكس ايجابا لتطويره وتوفر المستلزمات الضرورية من اجل التقدم نحو الافضل لضمان تحقيق التعلم الافضل ، كما تساعد الطالب ان يكون فعالا مثمرا لصالح الجماعة ، وتمتاز بروح المنافسة الذي يعد عنصرا من عناصر اتقان الجانب المهاري والارتقاء به ، على ان يتم التخطيط لها بشكل سليم خلال الوحدات التعليمية لدرس التربية الرياضية بما يضمن نجاحها في تحقيق الأهداف المخططة من أجلها ، وتكمن أهمية البحث من خلال استخدام أسلوب تعليمي يحمل في طياته أمكانية تطوير المهارات الأساسية للكرة الطائرة للمرحلة المتوسطة باستخدام الألعاب الصغيرة خدمة لأبنائنا ولمدرسينا لتقديم ما هو افضل وبما يناسب التطور الكبير في الطرق والأساليب المستخدمة في العالم ، وقام الباحثان بتحديد مجتمع البحث والمتمثل بطلاب الأول متوسط لمدرسة ( الخندق للبنين ) والتابعة لمديرية تربية (الكرخ الثانية) والبالغ عددهم ( 97 ) طالب ، واستخدم الباحثان المنهج التجريبي بتصميم المجموعات المتكافئة متساوية العدد مجموعة تجريبية وأخرى ضابطة وذلك لملائمته وطبيعة المشكلة ، وقام الباحثان باختيار عينة البحث بالطريقة العشوائية وبأسلوب القرعة ، اذ وقع الاختيار على (24) طالبا من الشعب ( ا ، ج ) لتكون عينة البحث ، وبواقع (12) طالب لكل مجموعة . واستبعد الباحث الطلاب المتغيبين عن الدروس والراسبين والممارسين للعبة ، وبعد جمع البيانات ومعالجتها احصائياً تم التوصل الى مجموعة استنتاجات اهمها ان اسلوب الألعاب الصغيرة له تأثير فعال في متغيرات البحث مقارنة بالأسلوب المتبع .
تأثير تمرينات الاتزان المصاحبة لبعض الوسائل العلاجية في اعادة تأهيل التواء مفصل الكاحل للاعبي اندية الدرجة الأولى بكره القدم
Authors: خليف عماد كاظم , علي افتخار احمد 
Published: February 2021

هدفت الدراسة التعرف على تا ثير التمرينات الخاصة المستخدمة لا عاده تأهيل التواء مفصل الكاحل للاعبي انديه الدرجة الاولى بكره القدم واستخدم الباحث الاختبارات المدى الحركي للمفصل والقوة العضلية للعضلات العاملة علية والاتزان الحركي وتكونت عينه الدراسة من (6) لاعبين تم اختيارهم بالطريقة العمدية حيث استخدم الباحثان المنهج التجريبي بأسلوب المجموعة الواحدة لملائمة طبيعة البحث واظهرت النتائج الدراسة وجود فروق ذات دلاله إحصائية ولصالح الاختبار البعدي ويوصي الباحثان ان التمرينات الخاصة مع الوسائل العلاجية ساعدت في تحسين المدى الحركي لمفصل الكاحل.
Modeling Stellar Abundance Patterns Resulting from the Addition of Earth-like Planetary Material
Authors: Cowley Charles R. , Bord Donald J. , Yüce Kutluay 
Published: February 2021

Abstract
We model the observed precision differential abundance patterns of three G-type dwarfs, assuming a mass of planetary or disk material was added to or subtracted from the atmosphere of the star. The two-parameter model is fit by linear regression. The stellar abundance patterns are corrected for Galactic chemical evolution (GCE). The differential abundances can be highly correlated with the elemental condensation temperature. We show how it is possible to match not only the slope, but the quantitative abundance differences, assuming a composition for the added material equal to that of the bulk earth. We also model the wide pair HIP 34407 and HIP 34426, where GCE corrections are assumed unnecessary. An appendix discusses issues of volatility and condensation temperature.
An Ab Initio Approach to Antiproton Modulation in the Inner Heliosphere
Authors: Engelbrecht N. Eugene , Moloto K. D. 
Published: February 2021

Abstract
Recent advances in the detection of cosmic-ray (CR) antiproton intensities at Earth have the potential to provide valuable new insights in the search for dark matter. As such, a fuller understanding of the modulation of these particles due to the influence of the Sun is of vital importance. Valuable insights can be gained through the study of galactic CR protons, as the transport parameters for these particles are theoretically expected to be the same as those for antiprotons, barring drift effects. As such, the present study develops a data-driven, 3D time-dependent ab initio model for the modulation of galactic CR protons in the region of the heliosphere dominated by the supersonic solar wind, which yields results in good agreement with spacecraft observations over several solar cycles when an observationally motivated expression for the differential intensity spectrum of these particles at the heliospheric termination shock is employed. This model is then applied to the study of solar-cycle-dependent antiproton modulation using two current estimates for the local interstellar differential intensities of these particles. This approach yields estimates of antiproton intensities at the heliospheric termination shock that are considerably lower than the proposed interstellar spectra, with the implication that a significant amount of antiproton modulation is expected to occur in the heliosheath.
SDSS-IV/MaNGA: Can Impulsive Gaseous Inflows Explain Steep Oxygen Abundance Profiles and Anomalously Low-Metallicity Regions?
Authors: Pace Zachary J. , Tremonti Christy , Schaefer Adam L. , Stark David V. , Witherspoon Catherine A. , Masters Karen L. , Drory Niv , Zhang Kai 
Published: February 2021

Abstract
Gaseous inflows are necessary suppliers of galaxies’ star-forming fuel, but are difficult to characterize at the survey scale. We use integral-field spectroscopic measurements of gas-phase metallicity and single-dish radio measurements of total atomic gas mass to estimate the magnitude and frequency of gaseous inflows incident on star-forming galaxies. We reveal a mutual correlation between steep oxygen abundance profiles between 0.25 and 1.5 R

e
, increased variability of metallicity between 1.25 and 1.75 R

e
, and elevated H i content at fixed total galaxy stellar mass. Employing a simple but intuitive inflow model, we find that galaxies with total stellar mass less than 1010.1
M
⊙ have local oxygen abundance profiles consistent with reinvigoration by inflows. Approximately 10%–25% of low-mass galaxies possess signatures of recent accretion, with estimated typical enhancements of approximately 10%–90% in local gas mass surface density. Higher-mass galaxies have limited evidence for such inflows. The large diversity of H i mass implies that inflow-associated gas ought to reside far from the star-forming disk. We therefore propose that a combination of high H i mass, steep metallicity profile between 0.25 and 1.5 R

e
, and wide metallicity distribution function between 1.25 and 1.75 R

e
be employed to target possible hosts of inflowing gas for high-resolution radio follow-up.
Optical Photometry of the Quasar 3C 454.3 during the Period 2006–2018 and the Long-term Periodicity Analysis
Authors: Fan J. H. , Kurtanidze S. O. , Liu Y. , Kurtanidze O. M. , Nikolashvili M. G. , Liu X. , Zhang L. X. , Cai J. T. , Zhu J. T. , He S. L. , Yang W. X. , Yang J. H. , Gu M. F. , Luo G. Y. , Yuan Y. H. 
Published: February 2021

Abstract
In this work, we present 8523 pairs of R-band optical photometry observations for the quasar 3C 454.3 made during the period of 2006 October–2018 February on the 70 cm meniscus telescope at Abastumani Observatory, Georgia, to study its intraday variabilities (IDVs) and long-term variations, and we have come to the following results. (1) We detected 10 outbursts, a ΔR = 3.825 mag variation, and some IDVs. The IDV timescales are from 4.1 to 285 minutes, with the corresponding variability amplitude being A = 2.9%–43.67%. The amplitude increases with IDV timescale. (2) The largest variation over a 1 day timescale is ΔR = 1.38 mag. (3) The IDV timescales suggest that the emission sizes are from 8.9 × 1013 cm to 6.20 × 1015 cm, and the magnetic field strengths are B = 0.18–0.79 G. (4) Period analysis results show three possible long-term periods, p = 3.04 ± 0.02 yr, p = 1.66 ± 0.06 yr, and p = 1.20 ± 0.03 yr in the optical light curve. We adopted the accretion disk models and the lighthouse models to period p = 3.04 ± 0.02 yr: in the accretion disk models, the binary black holes have masses M = 1.17 × 109
M
⊙; in the lighthouse models, we used two boosted jet flux densities to fit the observational light curve. (5) WWZ analysis gives some short-period (high-frequency) signals associated with strong bursts (JD 2,454,302 and JD 2,454,521) with variable frequencies and lasting for the entire observation time span (11.3 yr).
Helioseismic Modeling of Background Flows
Authors: Stejko Andrey M. , Kosovichev Alexander G. , Mansour Nagi N. 
Published: February 2021

Abstract
We present a three-dimensional (3D) numerical solver of the linearized compressible Euler equations (Global Acoustic Linearized Euler), used to model acoustic oscillations throughout the solar interior. The governing equations are solved in conservation form on a fully global spherical mesh (0 ≤ ϕ ≤ 2π, 0 ≤ θ ≤ π, 0 ≤ r ≤ R
⊙) over a background state generated by the standard solar model S. We implement an efficient pseudospectral computational method to calculate the contribution of the compressible material derivative dyad to internal velocity perturbations, computing oscillations over arbitrary 3D background velocity fields. This model offers a foundation for a “forward-modeling” approach, using helioseismology techniques to explore various regimes of internal mass flows. We demonstrate the efficacy of the numerical method presented in this paper by reproducing observed solar power spectra, showing rotational splitting due to differential rotation, and applying local helioseismology techniques to measure travel times created by a simple model of single-cell meridional circulation.
Antiviral Activity of Different Extracts of Standardized Propolis Preparations against HSV
Authors: Demir Sevda , Atayoglu Ali Timucin , Galeotti Fabio , Garzarella Emanuele U , Zaccaria Vincenzo , Volpi Nicola , Karagoz Ali , Sahin Fikrettin 
Published: February 2021

Background Viral infections are among the most common problems in health-care practice. Natural products offer great promise as potentially effective antiviral drugs. Propolis is a honeybee product with biological properties and therapeutic applications. We aimed to investigate the antiviral activity of different extracts of Standardized Propolis Preparations (M.E.D.®) with glycol, ethanol, glycerol and soya oil, against herpes simplex type-1 (HSV-1) and type 2 (HSV-2) viruses. Methods Chemical composition and antiviral activity of each extract were determined. The selective index (SI=CC50/EC50) was determined as a parameter to indicate the in vitro antiviral activity of the extracts compared with acyclovir as the control. Results SI values of glycol, ethanol, glycerol, soya oil extracts and acyclovir were determined as 6.8, 4.1, 2.2, 3.3 and 6.3 against HSV-1, and as 6.4, 7.7, 1.9, 4.2 and 2.9 against HSV-2, respectively. Glycolic propolis extract was found to possess a greater antiviral activity than acyclovir for both HSV-1 and 2, while glycolic, ethanolic and soya oil preparations were found to have more significant activity than acyclovir for HSV-2. Conclusions It was determined that standardized propolis preparations have antiviral bioactivity against HSV.
A Community-Based Prediabetes Knowledge Assessment among Saudi Adults in Al-Ahsa Region, 2018
Authors: AlSaleh Essa , Alnaser Morad , Alsalman Ali , Alramdhan Abdullah , Alsalman Husein , Alhamrani Ola , Alhamrani Alaa , AlSaleh Muntadher , AlEithan Tahani , AlArfaj Khawla , Al Sunayhir Hussain , AlSaleh Mujtaba 
Published: February 2021

Background Prediabetes has been considered to be a reversible condition; a modification of lifestyle and other intervention can be successfully applied during the prediabetes period to prevent the development of type 2 diabetes. The purpose of the present study was to assess knowledge of prediabetes and its risk factors for the community in the Al-Ahsa region. Design and method A cross-sectional community-based study was conducted in the Al-Ahsa region from mid-to-late December 2018. A sample size of 812 was determined using a single-proportion formula. Results Of the 812 respondents who gave consent to participate in the interview; the male to female ratio was 1.1:1. 13.2% of the respondents reported that they had diabetes. Among the respondents, 87.1% had a high level of knowledge of prediabetes, while 12.9% had low-to-moderate knowledge. 84% of males 40 years of age or older, 88.7% (384) of people with university or higher education, and 95.1% (78) of people who worked as health practitioners had high knowledge of prediabetes. Overall, there was a statistically significant association between age and prediabetes knowledge (χ2 =5.006, p=0.025). Occupation also showed a significant statistical association with prediabetes knowledge (χ2 =9.85, p=0.02). Conclusion Knowledge is considered an important factor in the prevention of prediabetes and diabetes. People in Al-Ahsa demonstrated a high level of knowledge regarding some risk factors for prediabetes. However, there were a number of deficiencies in the knowledge of prediabetes risk factors and preventive measures as well as in general knowledge of prediabetes, which may lead to a high prevalence of prediabetes and diabetes.
Digitization of Information Resources in Public Libraries and Museums in South-East, Nigeria: Problems and Prospects
Authors: Ogbu Kate Nkechinyere , Abubakar Abidina , Batagarawa Saddiq Abdulkadir 
Published: February 2021

This study examines the problems and prospects of digitization of information resources in public libraries and museums in South-East, Nigeria. Two research questions were formulated to guide the study and a survey research design was also used for the study. The population of the study consists of all the staff and users of public libraries and museums in South-East, Nigeria. A total sample size of 317 was selected using a simple random sampling technique. The researcher constructed two sets of questionnaire entitled “Problems and Prospects of Digitization of Information Resources in Public Libraries and Museums Questionnaire (PPDIRPLMQ) for data collection. The instrument for data collection was trial-tested for reliability. A total 317 copies of the questionnaire were distributed to the respondents and 293 were returned and found usable by the researcher. This gave a response rate of 92%. The data collected were analyzed using Mean (X) Standard Deviations and percentages to answer the research questions. Based on the data collected and analysed, the major findings of the study revealed some of the barriers to the digitization of information resources in public libraries and museums and also proffered some strategies in surmounting these challenges.
Keywords: Digitization, Information resources, Public libraries, Museums
Assessment of Capacity Building Efforts of Library and Information Professionals in University Libraries in Nigeria
Authors: Imam Mustapha , Muhammad Muntaka , Abba Mabruka Abubakar , Ijiekhuamhen Patrick Osaze 
Published: February 2021

This study assessed the capacity building efforts of library and information professionals in university libraries in Nigeria. The study adopted a descriptive survey design and a structured questionnaire was the instrument used for data collection. The exact population of the study is 238 librarians in the university libraries in South- South, Nigeria. The total enumeration sampling technique which involves studying the entire respondents was employed for the study. Two hundred and thirty eight copies of the questionnaire were distributed to the respondents; the researchers were able to retrieve only 211 questionnaires. Hence there was 89% response rate. The data collected for this study were analyzed using simple percentage and frequency counts using tables. The findings of the study revealed that the capacity building needs of library and information professionals in university libraries were majorly troubleshooting new technologies, academic research, internet search skills, e-library management, and library automation, among others. Additionally, findings show clearly that on the job training, in-house training, participation in professional association, lecture/ discussion and exercises, and job rotation were the major methods of building the capacity of library and information professionals. It was recommended that sufficient funding should be allocated to university libraries for the organization of capacity building programmes for library and information professionals, among others.
Keywords: Assessment, Capacity Building, Library and Information Professionals, University Libraries
GRUPO VIRTUAL DE SAÚDE: ESTRATÉGIA PARA PROMOÇÃO DO USO ADEQUADO DO PRESERVATIVO POR ADOLESCENTES ESCOLARES
Authors: Passos Santos Marks , Chaves Costa Edmara , Milhome da Costa Farre Anny Giselly , Barbosa de Sousa Leilane 
Published: February 2021

Objetivo: avaliar a estratégia educativa Grupo Virtual de Saúde desenvolvida por meio do aplicativo Whatsapp® como um recurso de promoção do uso adequado do preservativo por adolescentes escolares. Método: estudo quase experimental do tipo antes e depois, realizado com 59 adolescentes escolares, de 14 a 17 anos. Os dados quantitativos foram coletados por meio de questionário e os qualitativos por meio dos textos compartilhados via Whatsapp®. Resultados: houve acréscimo de conhecimento adequado acerca do uso do preservativo quando realizada a comparação do antes e do depois a intervenção educativa. Os dados revelaram ainda diferença significativa nas variáveis conhecimento (p = 0,007) e atitude (p = 0,009) acerca do uso do preservativo quanto à adequação das respostas aos itens do pré e pós-teste. Conclusão: a estratégia utilizada promoveu significativa aquisição de conhecimento e atitude para o uso adequado do preservativo em adolescentes escolares.
PENGARUH HERBISIDA BERBAHAN AKTIF PARAQUAT TERHADAP PERSENTASE KEMATIAN GULMA DAN JUMLAH MIKROORGANISME TANAH
Authors: Sakiah Sakiah , Guntoro Guntoro , Manullang Adri Moses 
Published: February 2021

Paraquat is an active herbicide used to control weeds chemically. This research aim is to determine the effect of herbicide applications with active paraquat matters on the percentage of weed mortality and the number of soil microorganisms. This research used a non-factorial randomized block design with five levels of treatment, that is P0: control; P1: 5 ml of paraquat in 1 litre of water, frequency of application is once a week; P2: 10 ml of paraquat in 1 litre of water, frequency of application is once a week; P3: 10 ml of paraquat in 1 litre of water, frequency of application is once in two weeks; and P4: 5 ml of paraquat in 1 litre of water, frequency of application is once in two weeks. The results of the observations were compiled in a Variety Checklist and continued with the Duncan Multiple Range Test. The results showed that the dominant weeds in the research plot were Ageratum conyzoides, Mimosa pudica, and Paspalum commersonii.The application of 5 ml/l paraquat herbicide, the frequency of application once a week was effective in reducing weed mortality. However, the use of paraquat did not significantly affect the number of soil microorganisms