https://hu.edu.ye/hu-publications/journals/index.php/hujnas <p>Hadhramout University Journal of Natural and Applied Sciences is a scientific refereed journal published each six months by the Deanship of Postgraduate Studies and Scientific Research at Hadhramout University. It aims at providing an opportunity for all researchers to publish their scientific studies. It focuses on the following natural and applied studies:<br />a- Basic sciences.<br />b- Medical and biological sciences.<br />c- Engineering and technological sciences.<br />d- Environmental and agricultural sciences.</p> Hadhramout University en-US Hadhramout University Journal of Natural & Applied Sciences https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/577 <p>The prediction model of the continuous catalytic regeneration reforming process was developed for <br>expecting the reformate yield and research octane number using an Artificial Neural Network technique (ANN) to <br>improve the process performance. The proposed model includes temperatures, pressures, and hydrogen to <br>hydrocarbon molar ratio as input parameters while the output of the process represents reformate yield and research <br>octane number. The ANN model was carried out to estimate the process behavior based on the LevenbergMarquardt Algorithm, which included the nine input parameters, two hidden layers (10-5 neurons), and two <br>parameters as network outputs. The results obtained were that the prediction error for the reformate test was 0.0027 <br>with a regression of 0.9995, while the research octane number was 0.0026 with a regression of 0.9979. The <br>proposed model showed the ability of Artificial Intelligence to predict either the yield &amp; octane number or simulate <br>the behavior of the process with more accurate.</p> Badiea S. Babaqi Abdelrigeeb Ali Al-Gathe Mohd S. Takriff Hassimi Abu Hasan Mohammed Al-Douh Copyright (c) 2024 Hadhramout University Journal of Natural & Applied Sciences 2024-03-05 2024-03-05 20 2 https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/578 <p>Breastfeeding is an essential and important for public health and growth newborn. It is considered as the <br>appropriate feeding method to provide necessary nutrition for the newborn. The study aimed to increase mothers' <br>knowledge about breastfeeding. Methods: The quasi-experimental research design was utilized in this study. The<br>study revealed that there is an effect of the education program on mothers' knowledge toward breastfeeding. The <br>total score of mothers' knowledge about breastfeeding showed that; 8.1% of mothers had good knowledge in pretest <br>and their knowledge improved after being implemented to be 76.3% in posttest, and 56.3% in follow up test. The <br>presented study findings highlighted the effect of education programs on mothers' knowledge of breastfeeding.<br>Also, this study discovered that there is a relationship between the characteristic and mothers' knowledge. It was <br>observed after the education programme was implemented. Recommendation: Yemenis' mothers need to continue <br>education program about breastfeeding, in particular the mothers who lives in rural areas.</p> Haddad Salim Al-Hebshi Noman Ahmed Alhatemi Laith Mahmoud Alosoufe Muhannad Abdulkawi Al-Fakih Copyright (c) 2024 Hadhramout University Journal of Natural & Applied Sciences 2024-03-05 2024-03-05 20 2 https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/600 <p>نفذت التجربة في مزرعة البحوث الزراعية في محافظة مارب خلال الموسمين 2021 – 2022م بهدف دراسة تأثير أربع فترات ري&nbsp; (5 ، 7 ، 10 ، 15 يوماً) وأربعة مستويات سماد كبريتات البوتاسيوم0 (%50 K2O) صفر و50 و 100 و 150كجم/هكتار) باستخدام تصميم القطاعات كاملة العشوائية على نسبة الأوراق /السيقان و عدد الأفرع / م2 وحاصل العلف الأخضر(طن/هكتار) لمحصول الذرة الرفيعة<em>Sorghum bicolor L</em><em>.</em> &nbsp;وأظهرت نتائج البحث تفوق فترات الري عند (7 أيام) في جميع الصفات المدروسة. وبينت النتائج&nbsp; زيادة في حاصل العلف الأخضر عند فترات الري (10 أيام) وسجلت فترات الري (15يوماً) أقل قيمة واوضحت النتائج فروقاً معنوية بين معاملات التسميد البوتاسي حيث أعطت معاملة التسميد (100 كجم/هكتار) أعلى قيمة في نسبة الأوراق /السيقان &nbsp;وعدد الأفرع ، وحاصل العلف الأخضر واظهرت النتائج فروقاً معنوية نتيجة التداخل بين السماد البوتاسي وفترات الري&nbsp; فقد تبين&nbsp; أن فترات الري عند (7 أيام) مع معاملة التسميد (100 كجم/هكتار) كافية لحدوث زيادة في نسبة الأوراق/السيقان وحاصل العلف الأخضر فيما اعطت فترات الري &nbsp;(7أيام) مع معاملة التسميد (150 كجم/هكتار) زيادة معنوية في عدد الأفرع ..</p> فضل ناصر سعيد مسعود وعبدالرحمن محمد نور حامد وعبده بكري أحمد فقيرة Copyright (c) 2024 2024-09-12 2024-09-12 20 2