Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
EVALUATION OF HOT MIX ASPHALT AND BINDER PERFORMANCE MODIFIED WITH HIGH CONTENT OF NANO SILICA FUME
378
399
EN
Ali
Youssef
Aboelmagd
0000-0002-6606-5208
Department of Civil Engineering, Assiut University, Egypt
ali_yousef@aun.edu.eg
Ghada
S.
Moussa
0000-0002-0842-5674
Department of Civil Engineering, Assiut University, Egypt
ghada.moussa@aun.edu.eg
Mahmoud
Enieb
0000-0001-5509-0849
Department of Civil Engineering, Assiut University, Egypt
m.enieb@aun.edu.eg
Safwan
Khedr
Department of Construction Engineering, American University in Cairo, Egypt
safkhedr@aucegypt.edu
El-Sayed
M
Abd Alla
Department of Civil Engineering, Assiut University, Egypt
elsayed.mohamed1@eng.au.edu.eg
10.21608/jesaun.2021.70733.1046
This research aims to evaluate the mechanical properties of hot asphalt mixtures prepared using modified asphalt binders with various contents of nano-silica fume (NSF). The modification to virgin bitumen is done by shear mixing with NSF at low contents (2, 4, 6, and 8%) and high contents (20, 30, 40, and 50%) with bitumen weight. The homogeneity of the modified asphalts was assessed using Scanning Electron Microscopy. The rotational viscosity, softening point, and penetration tests were used to evaluate the rheological-physical properties of the modified asphalt binders. The stiffness, moisture damage, rutting, and fatigue of the hot mixes prepared with NSF-modified binders were evaluated using Marshall, indirect tensile strength, and double punching tests. The results showed a significant improvement in the rheological-physical properties of the modified binders with high content compared to low content of NSF. Therefore, the modified binders with 30%, 40%, and 50% of NSF were selected to prepare NSF-modified mixtures. The results showed that asphalt mixtures incorporating 30, 40, and 50% NSF-modified binders were more resistant to moisture damage, rutting, and fatigue cracking compared to the control mixture. The novelty in this research is to produce a modified asphalt mixture with <span>two-thirds</span> a quantity of bitumen while achieving a high performance compared to the control mixture
Silica Fume,Moisture susceptibility,Double punching,rutting,Fatigue
https://jesaun.journals.ekb.eg/article_167957.html
https://jesaun.journals.ekb.eg/article_167957_ff8fedfa2d84e696d2501941ca51b70d.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
THE MEANING BEHIND THE DOMES: With the study of models in the modern age المعنى فيما وراء القباب مع دراسة نماذج فى العصر الحديث
400
423
EN
Kamal
M.K.M.
Elgabalawy
Assist. Professor, Department of Architecture, Faculty of Engineering, Benha University, Egypt.
kamal_elgabalawy@yahoo.com
10.21608/jesaun.2021.70266.1045
This research represents an entry point for an attempt to understand and explain the philosophical ideas, expressions and symbolic meanings that appeared behind the domes while tracing the roots of these ideas in previous ages to reach the origin of that thought, as these ideas did not originate from a vacuum, but are inherited through the different generations, the owners of the same thought, place and culture, then test These ideas in the Egyptian reality through a group of contemporary research examples that contain the dome element, then expressing opinion and participation through thought by means of a questionnaire in which a group of architects, architecture students and users of the people participated, in order to reach the extent of understanding and credibility of those ideas, and from this point of view the This research calls for an understanding through the mind of society in general and the architect in particular of this architectural element inherited through different generations.<br /> يمثل هذا البحث مدخلاً لمحاولة فهم وتفسير الأفکار الفلسفية والتعبيرات والمعانى الرمزية التى ظهرت وراء عنصر القباب مع تتبع جذور هذه الأفکار بالعصور القديمة السابقة للوصول إلى أصل ذلک الفکر عبر العصور المختلفة منذ الحضارة المصرية القديمة ومرورا بالحضارة المسيحية وحتى الحضارة الإسلامية منذ عصر الولاه وحتى عصر محمد على, حيث أن هذه الأفکار لم تنبع من فراغ ولکنها متوارثة عبر الأجيال المختلفة أصحاب الفکر والمکان والثقافة الواحدة, ثم اختبار هذه الأفکار الرمزية عن القباب فى الواقع المصرى المعاصر من خلال مجموعة الأمثلة البحثية فى العصر الحديث وکذلک إبداء الرأى والمشارکة من خلال الفکر بواسطة الاستبيان الذى شارک فيه مجموعة من المهندسين المعماريين والطلاب الدارسين في مجال العمارة والمستخدمين من الناس, وذلک للوصول إلى مدى استيعاب ومصداقية تلک الأفکار فى الواقع المعاصر, ومن هذا المنطلق فإن هذا البحث دعوه للفهم من خلال العقل للمجتمع بشکل عام والمعمارى بشکل خاص للوصول لعالم أفضل يدعوا إلى الفهم والتدبر في الکون.
Domes - Symbolism - Expression - Thought - Meaning. القباب,الرمزية,التعبير,الفکر,المعنى
https://jesaun.journals.ekb.eg/article_170272.html
https://jesaun.journals.ekb.eg/article_170272_8c6a54f0b81bf3742d8c91499c5764c1.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
Change detection for map updating using very high resolution satellite images
424
445
EN
Yasser
Gaber
0000-0003-4789-5705
Civil Engineering Department, Faculty of
Engineering, Sohag University
yasser_g_m@yahoo.com
Nasser
Ahmed
Civil Engineering Department, Faculty of
Engineering, Sohag University
naserahmed@eng.sohag.edu.eg
Farrag
Ali Farrag
Prof. of Surveying and Photogrammetry, Civil Engineering Department, Faculty of
Engineering, Assiut University.
farrag@aun.edu.eg
10.21608/jesaun.2021.67949.1039
ABSTRACT<br />The earth surface changes continuously due to the natural causes and human activities. New generations of satellite sensors, such as WorldView and GeoEye, provide new data to better delineate, track and visualise changes in land cover. A number of classes are used in the satellite images. All artefacts with elevations greater than the ground surface (buildings in particular) may appear in a wrong location. The correction of buildings position is an important task for mapping applications. The main aim of this study is to introduce a change detection approach using very high resolution satellite images (VHR) for map updating. In this approach, an approximated method for building relief displacement correction was developed.<br />In this paper, image preprocessing was carried out and information content of the satellite image was evaluated. Then change detection between GeoEye-1 image and Sohag map was carried out using post-classification comparison technique. After that the change map result was divided into two classes: building and non-building. All objects were transformed from raster to vector format. For building objects, the height was estimated. A python code was written to calculate relief displacement using buildings height and shadow length. The vector layer was added to update the reference map. The results showed the ability of very high-resolution satellites images for updating large scale maps in Egypt. Also, the approximated method for building relief displacement correction is a promising method. It has RMSE accuracy of 0.95m.
map updating,Change Detection,relief displacement
https://jesaun.journals.ekb.eg/article_171795.html
https://jesaun.journals.ekb.eg/article_171795_0dc37fb0677decba52c2659f40c170ee.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
Evaluation of the Hot Asphalt Mix Aggregate Gradation Using Bailey Method: A State-of-the-Art
446
475
EN
Kareem
Othman
0000-0002-5322-0918
Civil engineering department, University of Toronto, Toronto, Canada;
karemmohamed1993@cu.edu.eg
10.21608/jesaun.2021.71249.1047
The selection of the aggregate gradation, in the process of the asphalt mix design, is one of the most critical steps because it accounts for the overall strength of the asphalt mixture in terms of resisting the permanent deformation or rutting. This paper focuses on evaluating the current aggregate gradation selection procedure for the hot asphalt mix (HAM) using the three Bailey ratios. Additionally, this study analyzes, theoretically, the compaction and performance characteristics of the resulting HAM designed using the traditional design procedures which follow the trial-and-error technique in order to have a mix that satisfies the specification range. Results show that 14% of the samples prepared using the traditional technique satisfy the Bailey method guidelines and thus indicate good performance in the field. However, almost 80% of the asphalt mixes are tender asphalt mixes that are prone to segregation in the field, and 6 to 7% of the asphalt mixes are hard to compact. Based on the findings of this research, it is recommended that the Bailey Method analysis process should be incorporated into the mix design process as an additional tool to develop and select trial blends for the design of the asphalt mixes in Egypt.
Aggregate Gradation,Asphalt mix,Asphalt pavement,Bailey design method
https://jesaun.journals.ekb.eg/article_171794.html
https://jesaun.journals.ekb.eg/article_171794_f8027d647c96049ab9a13bab32420af6.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
AN INTELLIGENT DETECTION SYSTEM FOR COVID-19 DIAGNOSIS USING CT-IMAGES
476
508
EN
Amira
Hasan
1111-2222-3333-4444
Engineer, Electrical Engineering Department
Alexandria Higher Institute of Engineering Technology (AIET),Alex, Egypt
amira.mohamed@aiet.edu.eg
Hala
Abd El Kader
Professor, Electrical Engineering, Department, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
hala.mohamed@gmail.com
Aya
Hossam
Lecturer, Electrical Engineering, Department, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
aya_zayan@yahoo.com
10.21608/jesaun.2021.61028.1031
Early classification of the Coronavirus disease (COVID-19) is necessary to control its rapid spread and save patients’ lives. The fast spread of COVID-19 has increased the diagnostic encumbrance of radiologists. Therefore, clinicians need to quickly assess if a patient has COVID-19 or not. Artificial Intelligence (AI) has shown promising results in healthcare. So, this paper proposed a computer-aided intelligence model that can identify positive COVID-19 cases. It presented the pipeline of medicinal imaging and examination methods involved in COVID-19 image acquirement, segmentation, and diagnosis, using Computed Tomography (CT) images. This paper introduced two effective models for single machine learning (SML) and ensemble machine learning (EML) with 10-fold cross validation, to detect cases of COVID-19.The first classification model (SML) was applied with different algorithms, such as Decision Tree (DT), Artificial Neural Networks (ANN), and Support Vector Machines (SVM). Results showed that the performance of the SVM surpassed other classifiers with a 98.85 % accuracy. The second classification model (EML) was applied with several algorithms, such as Random Forest (RF), Voting, and Bagging, to increase its accuracy up to 99.60%, especially using the Bagging classifier. Finally, the results of the two proposed models showed better performance compared with other recent studies. However, the EML showed an even better performance than SML and is recommended for use in real-time.
Artificial Intelligence (AI),COVID-19,Machine learning (ML),Segmentation Method,Ensemble Machine Learning
https://jesaun.journals.ekb.eg/article_174737.html
https://jesaun.journals.ekb.eg/article_174737_7c8cd62c1efd383feda346b2884aaded.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
07
01
Assessments of Barriers to Implementing Cost Control and Optimal Cost Reduction Techniques in Construction Projects: A Case Study of Egypt
509
529
EN
Yasser
Aboelmagd
Assistant Professor, Department of Mathematics and physics Engineering, Faculty of Engineering, Alexandria University, Alexandria, Egypt
yasser.aboelmajd@alexu.edu.eg
10.21608/jesaun.2021.68050.1041
The earned value management is a leading technique in monitoring and analyzing project performance and project progress. To fill the gap of limited researches for studying factors inhibiting the ability of contractors to effectively control their projects, a survey was conducted on 22 construction project organizations. It was noted that most project managers and contractors in Egypt find difficulty in controlling project costs due to problems which include Change order, Changes in the design, Errors in the design, current economic situation deterioration, Delay project and Rising prices of materials. Main objectives of this paper are; 1) Identify and prioritize main problems for lack of techniques which cause poor management of cost control with poor site organization and inadequate supervision. 2) Demonstrate the modified Activity Based Costing system as best choices for cost accounting approach for determining construction project accurate cost. To improve capital project cost schedule and predictability using project control system for monitoring and predicting the construction project outcomes. The detailed scope of control systems must base on complexity, size and sensitivity strategy of studied project.
Ranking factors,Activity Based Costing,value engineering,Earned Value Management,Target Cost and Construction Management
https://jesaun.journals.ekb.eg/article_177147.html
https://jesaun.journals.ekb.eg/article_177147_79c52bc962caa6796ad0b2cd76e07f4c.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
49
No 4
2021
06
14
The role of interactive interior design elements in supporting the functional targets of kindergarten spaces دور عناصر التصميم الداخلي التفاعلية في دعم المستهدفات الوظيفية لفراغات رياض الأطفال
530
550
EN
Seham
Nofal
Department of Architecture, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
sehammnofal@yahoo.com
Essam
Mahrous
Department of Architecture, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
essam1960m@yahoo.com
Khaled
Salah
0000-0002-1805-6294
Department of Architecture, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
khaled@aun.edu.eg
Mostafa
Ahmed
Department of Architecture, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
mostafa.ahmed@aun.edu.eg
10.21608/jesaun.2021.77337.1054
Kindergarten buildings have a great role in forming the personality of the child at this age and contributing to the achievement of skills for the child. The development of kindergarten spaces aims mainly to improve the function of the main kindergarten buildings, from which it contributes to achieving the targeted skills of these buildings.<br /> The research problem is represented in the lack of clarity of the relationship between the interactive design elements and the skills intended to be acquired by the child inside the kindergarten buildings. This research paper aims at how to use the interactive design elements to support the function of the internal spaces of the kindergarten buildings, using the descriptive approach in describing the basic skills desired in the kindergarten and what It is the role of the interior designer in using and designing interactive elements that contribute to the development, and the descriptive analytical approach in identifying and describing the interactive elements and techniques that can be used within kindergarten classes, then the deductive approach to conclude the relationship between the desired skills from the kindergarten classes and the proposed interactive methods, including access to techniques and methods. The proposed interactive to develop the internal environment of kindergarten buildings.<br /> لمباني رياض الأطفال دور کبير في تکوين شخصية الطفل في هذه المرحلة العمرية والمساهمة في تحقيق مهارات للطفل، فتطوير فراغات مباني رياض الأطفال يهدف بشکل أساسي إلي تحسين وظيفة مباني رياض الأطفال الرئيسية ومنها يساهم في تحقيق المهارات المستهدفة من هذه الفراغات. وتتمثل مشکلة البحث الأساسية في عدم وضوح العلاقة بين العناصر التصميمية التفاعلية والمهارات المستهدف إکسابها للطفل داخل مباني رياض الأطفال لهذه المرحلة العمرية، فتهدف هذه الورقة البحثية إلي کيفية استخدام العناصر التصميمية التفاعلية لدعم وظيفة الفراغات الداخلية لمباني رياض الأطفال، باستخدام المنهج الوصفي في وصف المهارات الأساسية المرجوة من رياض الأطفال وما هو دور المصمم الداخلي في استخدام وتصميم عناصر تفاعلية تساهم في التطوير، والمنهج الوصفي التحليلي في حصر ووصف العناصر والتقنيات التفاعلية التي يمکن استخدامها داخل فصول رياض الأطفال، ثم المنهج الاستنتاجي لاستنتاج العلاقة بين المهارات المرجوة من فصول رياض الأطفال والأساليب التفاعلية المقترحة ومنها الوصول إلي التقنيات والأساليب التفاعلية المقترحة لتطوير البيئة الداخلية لمباني رياض الأطفال.
التصميم الداخلي,روضة,التفاعلية,مهارات
https://jesaun.journals.ekb.eg/article_177725.html
https://jesaun.journals.ekb.eg/article_177725_e9fcc4d66b55ed86e66313ad054c9ff1.pdf