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Prof. Dr. Akmal Abdelfatah
Department of Civil Engineering, American University of Sharjah, Sharjah, United Arab Emirates

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0 Traffic Operations
0 Intelligent transportation systems (ITS)
0 Dynamic traffic assignment
0 Dynamic OD estimation
0 Transport network modeling

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Journal article
Published: 19 July 2020 in Crystals
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In this paper, concrete mixes utilizing two sizes of natural aggregate and two sources of lightweight and recycled aggregates were used to investigate the effect of aggregate type and specimen size and shape on the compressive strength of concrete. In addition, samples from ready-mix concrete producers with different strengths were evaluated using standard size cylinders and cubes. Results were obtained on the 7th, 28th, and 90th day. In addition, flexural strength, split tension, and modulus of elasticity were evaluated on the 28th and 90th day. Statistical analyses were conducted to examine the significance of the difference between the compressive strength values for each two mixes using tests of hypotheses. Moreover, other mechanical properties as a function of compressive strength were discussed and compared to those predicated by the American Concrete Institute (ACI) specifications. Results indicate specimen shape has a noticeable effect on the compressive strength as the Cylinder/Cube ratio on the 90th day was ranging between 0.781 and 0.929. The concrete compressive strength and modulus of elasticity were significantly affected by the aggregate type. The flexural strength and split tensile strength were less affected by the aggregate type, which was also confirmed by the values predicted with the ACI equations.

ACS Style

Sherif Yehia; Akmal Abdelfatah; Doaa Mansour. Effect of Aggregate Type and Specimen Configuration on Concrete Compressive Strength. Crystals 2020, 10, 625 .

AMA Style

Sherif Yehia, Akmal Abdelfatah, Doaa Mansour. Effect of Aggregate Type and Specimen Configuration on Concrete Compressive Strength. Crystals. 2020; 10 (7):625.

Chicago/Turabian Style

Sherif Yehia; Akmal Abdelfatah; Doaa Mansour. 2020. "Effect of Aggregate Type and Specimen Configuration on Concrete Compressive Strength." Crystals 10, no. 7: 625.

Case report
Published: 04 September 2017 in Quality Assurance in Education
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PurposeThis paper aims to survey students and faculty from the College of Engineering at an American university in the United Arab Emirates about their perception on different issues related to academic dishonesty. Opinions were sought on plagiarism, inappropriate collaboration, cheating on exams, copyright violations and complicity in academic dishonesty. Reasons for students to commit dishonest acts and ways to reduce academic misconduct were also included.Design/methodology/approachA survey involving 11 questions with multiple choice answers was developed and distributed to engineering students and faculty at the institution to get their perception of the considered issues.FindingsResults of the study showed that while faculty and students were generally in agreement in their perception of the frequency of academic dishonesty among students, they greatly differed on the courses of action needed to reduce them. Most faculty members favored applying tougher penalties and using more proctors in exams. On the other hand, students preferred softer approaches such as educating them on academic integrity issues, applying lenient deadlines for assignments and reducing the difficulty of exams.Research limitations/implicationsThe conclusions and recommendations of the study are applicable to colleges of higher education having similar characteristics and culture to the surveyed institution.Practical implicationsThe findings can be used to understand students’ behavior and faculty’s attitude toward academic dishonesty, and to assess the effectiveness of current strategies addressing the issue at similar universities in the region.Originality/valueThe conducted literature review indicated that this work is believed to be a pioneering case study in the Gulf Cooperation Council countries.

ACS Style

Sami W. Tabsh; Akmal S. Abdelfatah; Hany A. El Kadi. Engineering students and faculty perceptions of academic dishonesty. Quality Assurance in Education 2017, 25, 378 -393.

AMA Style

Sami W. Tabsh, Akmal S. Abdelfatah, Hany A. El Kadi. Engineering students and faculty perceptions of academic dishonesty. Quality Assurance in Education. 2017; 25 (4):378-393.

Chicago/Turabian Style

Sami W. Tabsh; Akmal S. Abdelfatah; Hany A. El Kadi. 2017. "Engineering students and faculty perceptions of academic dishonesty." Quality Assurance in Education 25, no. 4: 378-393.

Review
Published: 25 December 2011 in Advances in Civil Engineering
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The goal of sustainable construction is to reduce the environmental impact of a constructed facility over its lifetime. Concrete is the main material used in construction in the Gulf Cooperation Council (GCC). Therefore, it makes economic and environmental sense to use recycled materials in the making of new concrete for different applications. The objectives of this study are to summarize published research on the use of recycled concrete aggregates in new concrete mixes and examine its implementation in construction and industry in the GCC region. The study showed that while there is reasonable research on recycled concrete, the practical implementation in the region greatly lacks behind, especially due to the lack of economic viability and awareness of such applications at the current time.

ACS Style

Akmal S. Abdelfatah; Sami W. Tabsh. Review of Research on and Implementation of Recycled Concrete Aggregate in the GCC. Advances in Civil Engineering 2011, 2011, 1 -6.

AMA Style

Akmal S. Abdelfatah, Sami W. Tabsh. Review of Research on and Implementation of Recycled Concrete Aggregate in the GCC. Advances in Civil Engineering. 2011; 2011 (1):1-6.

Chicago/Turabian Style

Akmal S. Abdelfatah; Sami W. Tabsh. 2011. "Review of Research on and Implementation of Recycled Concrete Aggregate in the GCC." Advances in Civil Engineering 2011, no. 1: 1-6.