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Energy harvesting systems: Technologies, applications, designs, and simulation models | The reality and the challenges. (2019)
Presentation / Conference
Hafez, A. (2019, March). Energy harvesting systems: Technologies, applications, designs, and simulation models | The reality and the challenges. Presented at The International Conference on Innovative Applied Energy

This paper aims to show and classify the various types of energy harvesting technologies, and find out the potential pros and cons from the existing energy harvesting techniques with different applications. There are many energy-harvesting systems di... Read More

Solar-powered Stirling engine: past, present, and future (2018)
Presentation / Conference
Hafez, A., Khodary, A., & Hamed, A. (2018, September). Solar-powered Stirling engine: past, present, and future. Presented at 5th International Conference on Power and Energy Systems Engineering (CPESE 2018)

A comprehensive review for solar tracking systems design in photovoltaic cell, module, panel, array, and systems applications. (2018)
Presentation / Conference
Hafez, A., Yousef, A., Soliman, A., & Ismail, I. (2018, June). A comprehensive review for solar tracking systems design in photovoltaic cell, module, panel, array, and systems applications. Poster presented at 7th World Conference on Photovoltaic Energy Conversion, 2018 IEEE 45th Photovoltaic Specialists Conference (PVSC)

This paper presents a comprehensive review on solar tracking systems and their potentials on Photovoltaic systems. The paper overviews the design parameters, construction, types and drive system techniques covering myriad usage applications. The perf... Read More

Solar tracking systems: technologies and trackers drive types : a review (2018)
Journal Article
Hafez, A., Yousef, A., & Harag, N. (2018). Solar tracking systems: technologies and trackers drive types : a review. Renewable and Sustainable Energy Reviews, 91, 754-782. doi:10.1016/j.rser.2018.03.094

This paper presents a comprehensive review on solar tracking systems and their potentials in solar energy applications. The paper overviews the design parameters, construction, types and drive system techniques covering different usage application. T... Read More

Impact of oil composition on microwave heating behavior of heavy oils (2018)
Journal Article
Zhang, Y., Adam, M., Hart, A., Wood, J., Rigby, S. P., & Robinson, J. P. (in press). Impact of oil composition on microwave heating behavior of heavy oils. Energy and Fuels, doi:10.1021/acs.energyfuels.7b03675

Electromagnetic heating techniques have recently received significant attention as alternatives to conventional heating methods for thermal processing of viscous and heavy oils. One of the benefits of electromagnetic heating is that the electromagnet... Read More

Design analysis of solar parabolic trough thermal collectors (2017)
Journal Article
Hafez, A., Attia, A., Eltwab, H., ElKousy, A., Afifi, A., AbdElhamid, A., …Ismail, I. (2018). Design analysis of solar parabolic trough thermal collectors. Renewable and Sustainable Energy Reviews, 82(1), 1215-1260. doi:10.1016/j.rser.2017.09.010

This paper presents a review of the design parameters, mathematical techniques and simulations used in the design of parabolic trough solar systems, along with a review on their applications. Recent studies that analyze the deployment of solar parabo... Read More

Microwave fluidized bed for biomass pyrolysis. Part II: Effect of process parameters (2017)
Journal Article
Adam, M., Beneroso, D., Katrib, J., Kingman, S., & Robinson, J. P. (in press). Microwave fluidized bed for biomass pyrolysis. Part II: Effect of process parameters. Biofuels, Bioproducts and Biorefining, doi:10.1002/bbb.1781

The microwave fluidized bed process developed in Part I (DOI: 10.1002/bbb.1780), in which the heating heterogeneity issues are overcome, has been applied to the pyrolysis of biomass. The degree of pyrolysis was established by studying the behavior of... Read More

Microwave fluidized bed for biomass pyrolysis. Part I: Process design (2017)
Journal Article
Adam, M., Beneroso, D., Katrib, J., Kingman, S., & Robinson, J. P. (in press). Microwave fluidized bed for biomass pyrolysis. Part I: Process design. Biofuels, Bioproducts and Biorefining, doi:10.1002/bbb.1780

The production of bio-oils from microwave pyrolysis has received increasing attention from bioenergy researchers, but no studies reported to date have proposed reliable solutions to avoid thermal runaway. The motivation of this paper is to develop an... Read More

Ovarian reserve after salpingectomy: a systematic review and meta-analysis (2017)
Journal Article
Mohamed, A. A., Yosef, A. H., James, C., Al-Hussaini, T. K., Bedaiwy, M. A., & Amer, S. A. (2017). Ovarian reserve after salpingectomy: a systematic review and meta-analysis. Acta Obstetricia et Gynecologica Scandinavica, 96(7), doi:10.1111/aogs.13133

Introduction Although there has been a growing concern over the possible damaging effect of salpingectomy on ovarian reserve, this issue remains uncertain. The purpose of this meta-analysis was to test the hypothesis that salpingectomy may comprom... Read More

The impact of laparoscopic ovarian drilling on AMH and ovarian reserve: a meta-analysis (2017)
Journal Article
Amer, S. A., Shamy, T. T. E., James, C., Yosef, A. H., & Mohamed, A. A. (2017). The impact of laparoscopic ovarian drilling on AMH and ovarian reserve: a meta-analysis. Reproduction, 154(1), doi:10.1530/REP-17-0063

Laparoscopic ovarian drilling (LOD) has been widely used as an effective treatment of anovulatory women with polycystic ovarian syndrome (PCOS). However, there has been a growing concern over a possible damaging effect of this procedure on ovarian re... Read More

Tilt and azimuth angles in solar energy applications – A review (2017)
Journal Article
Hafez, A., Soliman, A., El-Metwally, K., & Ismail, I. (2017). Tilt and azimuth angles in solar energy applications – A review. Renewable and Sustainable Energy Reviews, 77, 147-168. doi:10.1016/j.rser.2017.03.131

This paper presents a review of tilt angle and azimuth angles in solar energy applications. The paper involves an overview of design parameter, applications, simulations and mathematical techniques covering different usage application. The number of... Read More

Design analysis factors and specifications of solar dish technologies for different systems and applications (2016)
Journal Article
Hafez, A., Soliman, A., El-Metwally, K., & Ismail, I. (2017). Design analysis factors and specifications of solar dish technologies for different systems and applications. Renewable and Sustainable Energy Reviews, 67, 1019-1036. doi:10.1016/j.rser.2016.09.077

In this paper, a feasibility study is carried out in order to investigate the description, working principles of the solar parabolic dish systems worldwide, and their potential use in some countries are given. A study of the system is presented, whic... Read More

Solar parabolic dish Stirling engine system design, simulation, and thermal analysis (2016)
Journal Article
Hafez, A., Soliman, A., El-Metwally, K., & Ismail, I. (2018). Solar parabolic dish Stirling engine system design, simulation, and thermal analysis. Energy Conversion and Management, 126, 60-75. doi:10.1016/j.enconman.2016.07.067

Modeling and simulation for different parabolic dish Stirling engine designs have been carried out using Matlab®. The effect of solar dish design features and factors such as material of the reflector concentrators, the shape of the reflector concent... Read More

The impact of excision of benign nonendometriotic ovarian cysts on ovarian reserve: a systematic review (2016)
Journal Article
Mohamed, A. A., Al-Hussaini, T. K., Fathalla, M. M., El Shamy, T. T., Abdelaal, I. I., & Amer, S. A. (2016). The impact of excision of benign nonendometriotic ovarian cysts on ovarian reserve: a systematic review. American Journal of Obstetrics and Gynecology, 215(2), doi:10.1016/j.ajog.2016.03.045

Background Benign nonendometriotic ovarian cysts are very common and often require surgical excision. However, there has been a growing concern over the possible damaging effect of this surgery on ovarian reserve. Objective The aim of this m... Read More

Phase variation mediates reductions in expression of surface proteins during persistent meningococcal carriage (2014)
Journal Article
Alamro, M., Bidmos, F. A., Chan, H., Oldfield, N. J., Newton, E., Bai, X., …Bayliss, C. D. (2014). Phase variation mediates reductions in expression of surface proteins during persistent meningococcal carriage. Infection and Immunity, 82(6), doi:10.1128/IAI.01521-14

Asymptomatic and persistent colonization of the upper respiratory tract by Neisseria meningitidis occurs despite elicitation of adaptive immune responses against surface antigens. A putative mechanism for facilitating host persistence of this bacteri... Read More

Simulation, design and thermal analysis of a solar Stirling engine using MATLAB (2014)
Journal Article
Shazly, J., Hafez, A., El Shenawy, E., & Eteiba, M. (2014). Simulation, design and thermal analysis of a solar Stirling engine using MATLAB. Energy Conversion and Management, 79, 626-639. doi:10.1016/j.enconman.2014.01.001

This paper presents the modeling and simulation for a prototype of the solar-powered Stirling engine working at the low temperature range. A mathematical model for the thermal analysis of the solar-powered low temperature Stirling engine with heat tr... Read More