bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modulated ion-acoustic wavepackets in a multi-component dense plasma with Thomas-Fermi distribution
Authors: Khaled Mahmood Ahmed Hassan , Shukri Mohmed Ali , Fare'e Rowaida  Abdullah Abdo Hassan 
Published: May 2023

Modulated ion acoustic wavepackets have been investigated in a multi-component, dense plasma containing degenerate electrons/positrons, and positive/negative ions. The electrons and positrons assumed to be followed Thomas-Fermi distribution, while the ions considered to be classic. Employing a multi-scale perturbation technique, the nonlinear Schrödinger equation is derived. The criteria for the occurrence of modulational instability of the modulated ion acoustic waves are analyzed. The influences of plasma parameters on the modulational instability and its growth rate have been discussed. The envelope solitons have been discussed as well. The results showed that both modulationally unstable domain and stable domain can be found, depending on the plasma parameters. It is also found that the width of the envelop solitons are significantly modified by related plasma parameters. The present results will be useful in understanding the conditions for modulational instability of ion acoustic waves which are relevant to both space and laboratory dense plasmas.
Larvicidal Effects of New Organophosphorus Schiff base compounds against Dengue Fever Vector Aedes aegypti (Diptera; Culicidae)
Authors: Jamil Yasmin , Al-Azab Abbas M. , Al-Azab Fathi , Al.Selwi Nedhal 
Published: May 2023

Mosquitoes are the most important medical insect, that transmits diseases, such as dengue fever and malaria. The biological effects of new Organophosphorus Schiff base compounds (2-Furalidenediphenylphosphate-1-phenylsemicarbazide OPSL1) and 2-methoxybenzalidenediphenylphosphate-1-phenylsemicarbazide OPSL2) against the mosquito larvae of Aedes aegypti was evaluated at different concentrations using WHO standard susceptibility test with some modifications. A laboratory bioassay was conducted to assess the larvicidal activity under controlled laboratory conditions, late 3rd or early 4th instar larvae were exposed to various concentrations – ranging from 150 ppm to 1200 ppm of the tested compounds. Mortalities were observed to increase with the increase in concentrations. The results showed that OPSL2 revealed significantly high activity against Ae. aegypti with (LC50 = 600.6 ppm) compared to the OPSL1, with LC50 = 642.9 ppm respectively. Further investigations would be required to evaluate the new active Organophosphorus compounds responsible for larvicidal efficacy in the future.
Development and validation of a new spectrophotometric method for simultaneous determination of spiramycin and metronidazole in tablet pharmaceutical dosage forms using chemometrics technique in comparison with HPLC
Authors: Almaqtari Maher , Al-Odaini Najat , Alarbagi Fares , Alattab Bushra , Al-Maydama Hussein 
Published: May 2023

A new, easy, fast, and cost-effective simultaneous spectrophotometric method for determining the combined concentration of spiramycin and metronidazole in tablet pharmaceutical formulations was developed and proposed. The suggested method was validated using two chemometric techniques, namely partial least square regression (PLS) and principal component regression (PCR). The significance of the proposed method is that pretreatment or separation steps are not required. Various drug concentrations and instrumental spectra of 25 mixed solutions of spiramycin and metronidazole were used for model design and validation. The UV analysis of the prepared mixtures was recorded with respect to a selected solvent blank in the wavelength range of 200–375 nm. The digitized absorbance was sampled at 0.2 nm intervals. The R2 values of 1 and 0.9998 assigned for the PLS of spiramycin and metronidazole, and those of 0.9991 and 0.9998 for the PCR of spiramycin and metronidazole, respectively, exhibited greater prediction efficiencies. The results were statistically compared to those of the HPLC reference method. The statistical comparison between the recommended (PLS and PCR) and reference HPLC method did not find any appreciable variations in accuracy or precision. The suggested approach is simple, effective, and trustworthy enough to be employed as an alternative analytical method for quality control of drug analysis in the pharmaceutical industry.
Mechanical Properties of the (81Sn–xCu–(19-x) In) % Alloys with x=1, 2, 3, 4, and 5
Authors: Al-Hammadi A.H. , Loqman Ibrahim G. H , AL-Hdhrami R.M.H. 
Published: May 2023

Research on Material Science has a long tradition, and lead has been used widely in many applications. Because of their low melting temperatures, low cost, and good wettability, tin -lead alloys have been preferred as solder alloys in industrial production, particularly in the electronics sector. However, due to the negative effects of lead on the environment and human health, studies on lead-free solder alloys have been increasing, and the subject is still important today. Furthermore, environmental protection agencies (RoHS and WEEE) have prohibited the use of lead-containing solder alloys in the manufacture of electronic and microelectronic products. In this work, the effect of adding Cu to alloys in five compositions of (81Sn-xCu-(19-x)In) % with x=1, 2, 3, 4, and 5 on the mechanical properties has been studied. The five samples were prepared from high purity (99%) elements (Sn –Cu –In ) using the melting technique. The creep of the ternary alloys was examined at different temperatures (25, 50, and 80 ) under three different loads (2.5, 6.3, and 11.4 MPa). It was found that the creep rate of the ternary alloys was increasing with the increases in Cu –content in all samples at different temperatures and loads. The mean values of the stress exponent were found to be in the range of (0.1-2.5) as well as the activation energies vaied in the range of (0.48-5.33) eV for all alloys under different loads (2.5, 6.3, and 11.4 MPa).
Surgical Management of Acquired Subglottic Stenosis in Patients Attending Al-Thawrah Teaching Hospital
Authors: Muthanna Ali Obaid 
Published: May 2023

Background: Subglottic stenosis is one of the most complex and challenging issues in the field of otolaryngology. The management involves a multidisciplinary approach with multiple procedures. The main aim of the management is to keep the airway patent and preserve voice production. The aim of the study was to evaluate the results of treatment methods of subglottic stenosis.
Methods: The prospective study was conducted on 40 patients between January 2012 and March 2018 at
Otorhinolaryngology Department, Al Thawra Teaching Hospital, Sana’a, Yemen.
Results: Of the subglottic stenosis patients studied, 30 (75%) were male and 10 (25%) were female. The mean age was 18.6 years. High incidence of 60% was found in the age group (15-24 years) while less was found in the age group >34 years (7.5%). Grade III stenosis represented (50%) and grade IV (25%). Endoscopic dilation was successful in grade I (100%) and grade II (80%). The external approach was successful in 18/31 (58.1%), while the success rate in all grades was (67.5%). About 50% of the patients were presented with tracheostomy in place.
Conclusion: Acquired subglottic stenosis causes airway compromise and significant morbidity to the patients. The management involves a multidisciplinary approach with multiple procedures. A large number of endoscopic and open procedures are currently in use for the treatment of this condition. There is no single method of treatment that is universally successful. Results of treatment are not very satisfactory due to multiple factors.
Consanguinity is Strongly Associated with Fetal Congenital Anencephaly
Authors: Shuaib Alia A 
Published: May 2023

Background: Anencephaly is a type of neural tube defect characterized by abnormal development of the brain and the bones of the skull. Aims: to investigate the association between consanguinity and anencephaly which is the most severe form of neural tube defects and to assess the magnitude of the problem. Methods :A case-control study was conducted between January and December 2014, all women with anencephaly that were admitted to the obstetric department of al Thawra General hospital , Sana'a , were enrolled in this study .The subjects were divided into study ( n = 72 ) and control groups (n=25). Results: From a total of 11283 deliveries, 97 women were having anencephaly giving the overall incidence as 8.5/1000 births. We found significant number (74.2%) of these affected women had consanguineous marriage (95% CI 62.5-83.7; p = 0.0001). The first cousin union was present in (68%). Compared with control, the study cases were characterized by poverty, low education, absence of antenatal care, and mostly from rural setting. Conclusion: Consanguineous marriage is common in our societies and strongly associated with fetal congenital anomalies particularly anencephaly.
العلاقة بين الصحة التنظيمية والتمكين الإداري وأثرهما في تحقيق التميز المؤسسي في الجامعات اليمنية الحكومية من وجهة نظر القيادات الأكاديمية والإدارية
Authors: قدحة مروة حمود محمد , العامري د. عبد العزيز عبد الهادي 
Published: May 2023

هدف البحث إلى التعرف على العلاقة بين الصحة التنظيمية والتمكين الإداري وأثرهما في تحقيق التميز المؤسسي في الجامعات اليمنية الحكومية من وجهة نظر القيادات الأكاديمية والإدارية، واستخدم الباحثان المنهج الوصفي بأسلوبيه المسحي والارتباطي، والاستبانة أداة لجمع البيانات من عينة البحث المكونة من القيادات الأكاديمية في (4) جامعات حكومية، والبالغ عددهم (438) فرداً، وهم يمثلون ما نسبته (36.11%) من مجموع مجتمع البحث، وتوصلت نتائج البحث إلى أن مستوى توافر أبعاد الصحة التنظيمية والتمكين الإداري والتميز المؤسسي في الجامعات اليمنية الحكومية كان متوسطاً، كما أظهرت النتائج وجود علاقة ارتباط إيجابية طردية ذات دلالة إحصائية عند مستوى (α ≤ 0.05) بين الصحة التنظيمية والتميز المؤسسي، وبين التمكين الإداري والتميز المؤسسي، وبين الصحة التنظيمية والتمكين الإداري في الجامعات اليمنية الحكومية. ووجود أثر ذو دلالة إحصائية عند مستوى (α ≤ 0.05) للصحة التنظيمية في تحقيق التميز المؤسسي، ووجود أثر معنوي للتمكين الإداري في تحقيق التميز المؤسسي، كما تبين وجود أثر معنوي للصحة التنظيمية والتمكين الإداري معاً في تحقيق التميز المؤسسي.
الكلمات المفتاحية: الصحة التنظيمية، التمكين الإداري، التميز المؤسسي، الجامعات الحكومية، اليمن.
المساهمة النسبية لبعض اختبارات التوافق العضلي العصبي في مستوى الأداءات المهارية المركبة لدى ناشئي كرة القدم.
Authors: مطهر عبدالغني مجاهد صالح , أنعم نجيب عبده علي 
Published: May 2023

هدف البحث إلى التعرف على العلاقة الارتباطية بين بعض اختبارات التوافق العضلي العصبي، ومستوى الأداءات المهارية المركبة، والتعرف على نسب المساهمة لاختبارات التوافق العضلي العصبي في مستوى الأداءات المهارية المركبة.
استخدم الباحثان المنهج الوصفي بأسلوب الدراسات الارتباطية لملاءمته لطبيعة البحث، ومن أجل الوصول إلى نسب مساهمة، استخدم الباحثان الانحدار الخطي المتعدد بالطريقة المعيارية (الادخال الكلي)، وقد تم اختيار عينة البحث بطريقة عمدية لعدد (40) ناشئا من مجتمع البحث.
ومن أهم النتائج التي توصل إليها البحث وجود علاقة ارتباط معنوية لبعض اختبارات التوافق العضلي العصبي في مستوى الأداءات المهارية المركبة، كما ظهرت نسب مساهمة مختلفة لبعض اختبارات التوافق العضلي العصبي في مستوى الأداءات المهارية المركبة.
الســلوك المـهني لمـدربي الألعاب الجماعـية والفـردية بأندية أمانة العاصمة في الجمهورية اليمنية
Authors: الصوفي بكيل حسين ناصر , مطهر عبدالغني مجاهد صالح , جعيم نجيب صالح مصلح 
Published: May 2023

يهدف البحث إلى التعرف على مستوى السلوك المهني لمدربي الألعاب الجماعية والفردية بأندية أمانة العاصمة، وكذا التعرف على الفروق في مستوى السلوك المهني لمدربي الألعاب الجماعية والفردية بأندية أمانة العاصمة تبعاً لمتغيرات نوع اللعبة، المستوى التعليمي، سنوات الخبرة. أُجري البحث على عينة مكونة من (59) مدرباً للألعاب الجماعية والفردية بأندية أمانة العاصمة، تم اختيارهم بالطريقة العمدية، واستخدم الباحثون المنهج الوصفي لملاءمته لطبيعة البحث، وقد توصل الباحثون إلى أن هناك درجة عالية من مستوى السلوك المهني لدى مدربي الألعاب الجماعية والفردية والمتمثلة بالشخصية والمظهر والكفايات المهنية وإدارة الفريق في التدريب والمنافسات، وكذلك في العلاقات الإنسانية والكفايات التقويمية، ولا يوجد فروق ذات دلالة إحصائية بين مستوى السلوك المهني لدى مدربي الألعاب الجماعية والفردية بأندية أمانة العاصمة تبعاً " لنوع اللعبة _ المستوى التعليمي _ سنوات الخبرة"، وقد أوصى الباحثون بضرورة التأكيد على الاتحادات والأندية الرياضية بإقامة دورات تدريبية إلى جانب الأمور الفنية التي من شأنها تعمل على تعزيز السلوك المهني للمدربين في جميع الألعاب الرياضية الجماعية والفردية، وإجراء دراسات مشابهة وعلى عينات مختلفة.
فاعلية برنامج محوسب في تنمية مهارات النحو الوظيفي لدى طلبة المرحلة الثانوية بأمانة العاصمة صنعاء
Authors: الجويد صفاء علي صالح , غالب أحمد حسان 
Published: May 2023

هدف البحث إلى معرفة فاعلية تدريس برنامج محوسب في تنمية مهارات النحو الوظيفي لدى طلبة المرحلة الثانوية بأمانة العاصمة" صنعاء، ولتحقيق هذا الهدف أعدت الباحثة قائمة بمهارات النحو الوظيفي المناسبة لطلبة الصف الأول الثانوي ، وبرنامج محوسب لتنمية تلك المهارات، واختبار تحصيلي ، واتبعت الباحثة المنهج شبه التجريبي ، في تنمية مهارات النحو الوظيفي ( مادة المعالجة ) ، وتم تحديد المجتمع المتمثل في جميع مدارس أمانة العاصمة بمديرية السبعين ، وحُددت العينة التي تمثلت بمدرسة سمية ، وقد توصل البحث إلى أهم النتائج :

وجود فروق ذات دلالة احصائية عند مستوى دلالة (05) بين متوسط درجات المجموعتين التجريبية والضابطة في الاختبار التحصيلي البعدي لمهارات النحو الوظيفي (التحريرية، والعقلية، والتذوقية) تعزى لصالح المجموعة التجريبية باستخدام البرنامج المحوسب.
وجود فروق ذات دلالة احصائية عند مستوى دلالة (05) بين متوسط درجات المجموعتين التجريبية والضابطة في الاختبار التحصيلي البعدي للمهارات النحو الوظيفي (التحريرية، والعقلية، والتذوقية) تعزى لصالح المجموعة التجريبية باستخدام البرنامج المحوسب، حيث جاءت المهارة الثانية العقلية (القرائية) في المرتبة الأولى، بينما المهارة التذوقية (التحدثية) المرتبة الثانية.
تفوقت المجموعة التجريبية على المجموعة الضابطة في الامتحان البعدي في كل المهارات (التحريرية، العقلية، التذوقية).
فاعلية البرنامج المحوسب في تنمية مهارات النحو الوظيفي بشكل عام لدى طالبات الصف الأول الثانوي، حيث تفوقت المجموعة التجريبية على الضابطة في الاختبار البعدي.
تصميم برنامج محوسب من أجل تنميتها وفق أهداف هذا البرنامج.
Pensar la realidad
Authors: Ochoa Fernández Angel Ignacio 
Published: May 2023

En el presente ensayo, Pensar la realidad humana es darle sentido a todo lo inherente a vida; por tanto, es necesario una cultura que propicie espacios de reflexión y acción que debe ser realidad como hecho significativo para reconocer al semejante como sujeto en cosmovisión, para cosificar la diversidad cognitiva, saber, reflexión, reconocimiento de autonomía y trascendencia, entre el otro en relación con el otros y la mismicidad como yo, como punto de partida de la singularidad cognitiva, en existencia de dignidad plural, dialogo y reconocimiento en relaciones realmente humanas.
Tendencias educativas de las aulas del futuro
Authors: Blanco Rosado Lisander Antonio 
Published: May 2023

La educación actual tiene que ir en armonía con los cambios que las sociedades promueven como producto de las transformaciones tecnológicas y científicas. Son muchos los estudios y teorías que afirman la necesidad de contextualizar la dinámica educativa con base a las realidades sociales y la globalización es una realidad innegable. Sin embargo, los procesos educativos siguen promoviendo prácticas tradiciones y memorísticas, lo que deja ver un desfase entre la educación, la realidad y lo social. En este sentido, el estudio se orientó a analizar las tendencias educativas de las aulas del futuro. La metodología empleada se ajustó al paradigma postpositivista, que permitió hacer una interpretación de la experiencia pedagógica de los docentes en Colombia, particularmente del departamento del Magdalena, enfatizada en el método fenomenológico. El instrumento para la recolección de información fue la entrevista, realizada a 8 docentes de las instituciones educativas dePlato, la información se procesó mediante el método de categorización y triangulación. Los hallazgos del estudio permitieron que las nuevas tendencias educativas en las aulas del futuro apunten a una educación virtual o una combinación de dos sistemas educativos presencial – virtual, el primero, rescate el acercamiento humano, docente-dicentes y estudiantes- estudiantes. Y el segundo, tiene como objetivo preparar al estudiante para que sea capaz de enfrentar los retos que la globalización y lassociedades imponen. Asimismo, las categorías que surgen del estudio tienen implicación directa con: la responsabilidad digital, competencias tecnológicas, la colaboración dentro de nuevos espacios educativos, pedagogía innovadora, habilidades para la vida y preparación laboral, aprendizajes dirigidos por estudiantes y nuevas conexiones que implican nuevas formas de pensamiento.
Exploring the Experiences of Parents as Facilitators of Learning in the New Normal in the Philippines
Authors: Magonalig Carlo A. , Gascon Mervin G. , Campaña Cherrelyn P. 
Published: May 2023

Aims: To explore and understand the experiences of parents as facilitators of learning to their school-aged children during the ‘new normal.
Study Design: Qualitative-Phenomenology.
Place and Duration of Study: Digos City, Davao del Sur, Philippines, during the School Year 2021-2022.
Methodology: The study used purposive sampling in choosing the participants. The target participants were parents who had school-age children. Fifteen parents who gave their consent to participate were included in the study. The information was obtained through validated semi-structured interview questionnaires.
Results: Most of the participants were female, aged 36-40, college graduates, and either housewives or teaching jobs. Five themes emerged. Themes for the challenges were difficulty in balancing time and responsibilities, lack of knowledge of the lessons, difficulty in imposing discipline on their children, physical and health concerns, and slow internet connectivity. On the other hand, four themes emerged for the strategies used by parents as facilitators: proper time management, use of the Internet for research, use of intrinsic and extrinsic motivations, and close supervision of children’s performance.
Conclusion: The COVID-19 pandemic did not spare anyone. Its emergence brings new challenges and responsibilities, particularly for parents with school-aged children. The parents’ concerns are family health and how they could help their children with their studies. These instances highlight the parents to adjust to the new and unexpected role in the new normal. Parents thought of solutions not only for their daily living but also for their children's education demands. The situations may be unpleasant and tiring, but parents, as they are, they show perseverance and patience. Parents' techniques may be better, but they are adequate for their problems. During these challenging times, the Department of Education (DepEd), the Local Government Units (LGU), and the Department of Social Work and Development (DSWD) may investigate the circumstances of parents with school-aged children and develop alternative programs which could address the educational needs of the parents.
Yield and Yield Components of Onion as Influenced by Intra-Row Spacing and Nitrogen Fertilizer Levels in Rift Valley, Ethiopia
Authors: Ashenafi Mitiku , Tenaye Sintayehu 
Published: May 2023

Background and Objectives: Farmers currently employ nationally approved fertilizer rates and plant spacing when growing onions, but knowledge of plant population density and fertilizer rates that may produce the best bulb production for different cultivars and locations is limited. As a result, gardeners frequently use nonspecific plant population densities for various cultivars, resulting in sub-optimal bulb yields.
Materials and Methods: A field experiment was conducted in 2019 from August to December to study the effects of intra-row plant spacing and levels of nitrogen on yield and quality of onion (Allium cepa L.) variety Nafis under irrigation.
Results: The main effect of intra-row spacing on stand count and both nitrogen levels and intra-row spacing on plant height and the number of leaves per plant was observed. The interaction of nitrogen level and intra-row distance affected days to maturity, leaf length, leaf diameter, bulb diameter, mean bulb weight, marketable and unmarketable bulb yield, and all bulb size categories. Increased intra-row spacing to 10.5 cm and N rate of 82 kg ha-1 increased marketable and total bulb yield by approximately 3.14 and 3.21 t ha-1, respectively, spacing and decreased unmarketable bulb yield by 1.38 t ha-1.
Conclusion: The use of 82 kg ha-1 N at the intra-row spacing of 10.5 cm was optimum for bulb production of onions. 82 kg ha-1 N at 10.5 cm intra-row spacing resulted in the highest net benefit.
Utility of EVendo Score as a Screening Tool for the Detection of High Risk Esophageal Varices in Pakistani Population
Authors: Jan Mahboob , Khan Raja Taha Yaseen , Ismail Hina , Shahzad Saleem , Tasneem Abbas Ali , Panezai Muhammad Qaiser , Kumar Danish , Mehmood Nasir , Adeel Muhammad , Khalid Muhammad Ali , Lail Ghulamullah , Nasir Abdullah , Luck Nasir Hasan 
Published: May 2023

Introduction: Endoscopy for the screening of esophageal varices (EVs) is costly and cannot be performed in remote areas with limited resources. Recently, certain non-invasive cost effective models have been proposed for the prediction of EVs but have failed recommendation on a larger scale. EVendo score is a recently developed bedside score for the detection of EVs. Therefore, our aim was to determine the utility of EVendo score as a screening tool for the detection of high risk esophageal varices in Pakistani population.
Methods: It was a cross sectional study which was conducted in the department of Hepatogastroenterology from January 2021-June 2022.All the patients of either gender aged greater than 18 years with newly diagnosed cirrhosis were included in the study while those patients with prior history of esophageal varices and variceal bleeding as well as those with acute liver failure, renal impairment, non-cirrhotic portal hypertension and those on anticoagulants were excluded from the study. Area under the receiver operating curve (AUROC) was obtained for EVendo score, Aspartate Transaminase to platelet ratio(APRI) and Platelet count to Splenic Diameter and diagnostic accuracy was obtained for these scores in predicting EVs and also in identifying HRVs.
Results: A total of 272 patients were enrolled in the study. Among them, 167(61.4%) were males. Most common cause of chronic liver disease was viral hepatitis.On screening endoscopy, EVs were noted in 118(43.4%) patients while high risk EVs (HRV) were noted in 47(17.3%) patients respectively. AUROC was obtained for EVendo score, APRI and Platelet count to Splenic Diameter in predicting EVs and also for identifying HRVs and it was 0.93 (p-value <0.001), 0.821(<0.001) and 0.842(p<0.001) respectively for the prediction of EVs with diagnostic accuracy of 86.76% and 0.852 (p-value <0.001), 0.835(<0.001) and 0.814(p<0.001) respectively for identifying HRVs with a diagnostic accuracy of 84.19%.
Conclusion: The performance of EVendo score was reliable and better than the other non-invasive scores in predicting EVs in our population with an excellent sensitivity and diagnostic accuracy in predicting the EVs and also in identifying HRVs. However, studies comprising larger sample sizes are required in this regard.