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Sayed, O. M., A. E. M. Mekky, A. M. Farag, and A. H. M. Elwahy, "3,4-Bis(bromomethyl)thieno[2,3-b]thiophene: Versatile Precursors for Novel Bis(triazolothiadiazines), Bis(quinoxalines), Bis(dihydrooxadiazoles), and Bis(dihydrothiadiazoles)", Journal of Heterocyclic Chemistry, vol. 53, no. 4, pp. 1113-1120, 2016. AbstractWebsite
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Sayed, O. M., A. E. M. Mekky, A. M. Farag, and A. H. M. Elwahy, "3,4-Dimethyl-2,5-functionalized thieno[2,3-b[thiophenes: Versatile precursors for novel bis-thiazoles", Journal of Sulfur Chemistry, vol. 36, no. 2, pp. 124-134, 2015. AbstractWebsite
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Sayed, O. M., A. E. M. Mekky, A. M. Farag, and A. H. M. Elwahy, "3,4-Dimethyl-2,5-Functionalized Thieno[2,3-b]thiophenes: Versatile Precursors for Novel Bis-thiazoles ", Journal of Sulfur Chemistry , vol. -, pp. 1-11, 2014.
Sadek, K. U., S. M. Fahmy, R. M. Mohareb, and M. H. Elnagdi, "3- Activated Nitriles In Heterocyclic Synthesis: Synthesis of Several New Pyrimidine and Pyridazine Derivatives", J. Chem. Engin. Data , vol. 29, pp. 101, 1984.
Sadek, K. U., S. M. Fahmy, R. M. Mohareb, and M. H. Elnagdi, "3- Activated Nitriles In Heterocyclic Synthesis: Synthesis of Several New Pyrimidine and Pyridazine Derivatives", J. Chem. Engin. Data , vol. 29, pp. 101, 1984.
Fanous, I. F. Z., M. Y. A. Younan, and A. S. Wifi, "3-D finite element modeling of the welding process using element birth and element movement techniques", Journal of pressure vessel technology, vol. 125, no. 2: American Society of Mechanical Engineers, pp. 144–150, 2003. Abstract
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Sites, C., P. S. Larson, A. Mohamed, A. M. Eldeib, A. Farag, and T. M. Moriarty, "3-D Modeling of the cerebral Vasculature", 5th International Workshop – Computer Assisted Surgery – CAS’99 and Rapid Prototyping in Medicine, Oct. 14 – 16, Erlangen, Germany, 1999. Abstract

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Carvalhais, I., M. Faheem, A. Habibi, A. Geraldo, A. Chaveiro, and M. F. da Silva, "333 EFFECTS OF BOVINE OOCYTE QUALITY ON KINETICS OF NUCLEAR MATURATION AND EMBRYONIC DEVELOPMENT AFTER IN VITRO FERTILIZATION", Reproduction, Fertility and Development, vol. 22, issue 1: CSIRO, pp. 322-323, 2009. Abstract
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Carvalhais, I., M. Faheem, A. Habibi, A. Geraldo, A. Chaveiro, and M. F. da Silva, "333 EFFECTS OF BOVINE OOCYTE QUALITY ON KINETICS OF NUCLEAR MATURATION AND EMBRYONIC DEVELOPMENT AFTER IN VITRO FERTILIZATION", Reproduction, Fertility and Development, vol. 22, issue 1: CSIRO, pp. 322-323, 2009. Abstract
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Carvalhais, I., M. Faheem, A. Habibi, A. Geraldo, A. Chaveiro, and M. F. da Silva, "333 EFFECTS OF BOVINE OOCYTE QUALITY ON KINETICS OF NUCLEAR MATURATION AND EMBRYONIC DEVELOPMENT AFTER IN VITRO FERTILIZATION", Reproduction, Fertility and Development, vol. 22, issue 1: CSIRO, pp. 322-323, 2009. Abstract
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M.G., E. - S., and S. F.B., "36. ELASTOHYDRODYNAMIC BEHAVIOUR OF FILM COVERED SURFACES.", European Tribology Congress, Eurotrib-81, Warszawa, Poland, Sept, 1981.
Abdulla, S. A., E. Y. Frag, and H. E. Ahmed, "38- Kinetic study of the alkaline degradation of imidapril hydrochloride using a validated stability indicating HPLC method", RSC Adv, vol. 6, pp. 69239-69250, 2016.
Moawad, A. R., D. Amarnath, I. Choi, P. Fisher, J. Zhu, and K. H. S. Campbell, "39. Vitrification of immature ovine oocytes with Cryoloop: Effect on in vitro fertilization rates", Cryobiology, vol. 57, no. 3: Academic Press, pp. 323, 2008. Abstract
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Fanous, I. F. Z., M. Y. A. Younan, and A. S. Wifi, "3D finite element modeling of the welding process using element birth and element movement techniques", ASME 2002 Pressure Vessels and Piping Conference: American Society of Mechanical Engineers, pp. 165–172, 2002. Abstract
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El-Rahman, A. A. I., W. A. Abdelfattah, and M. A. Fouad, "A 3D investigation of thermoacoustic fields in a square stack", International Journal of Heat and Mass Transfer, vol. 108, Part A, pp. 292 - 300, 2017. AbstractWebsite

Abstract The thermoviscous behavior of the oscillating gas within the porous medium of a thermoacoustic refrigerator enables the conversion of sound into heat in the process of typical standing-wave thermoacoustic refrigeration systems. Several nonlinear mechanisms, such as harmonics generation, self-induced streaming and possible turbulence, cause complicated flow behavior and influence the performance of such devices. Few analytical and numerical approximations (Cao et al., 1996; Worlikar and Knio, 1996; Worlikar et al., 1998) describe the flow field and the energy flux density in standing devices comprising stacks of parallel plates, but almost no 3-D simulation has been developed that models the large-amplitude excitations and enables the prediction of the oscillating-flow behavior within a porous medium made of square channels. Here, we build on existing effort (Abd El-Rahman and Abdel-Rahman, 2014) and report a computational fluid dynamics analysis of a Helium-filled half-wavelength thermoacoustic refrigerator. The finite volume method is used, and the solid and gas domains are represented by large numbers of hexahedral elements. The calculations assume a 3-D periodic cell structure to reduce the computational cost and apply the dynamic mesh technique to account for the adiabatically oscillating wall boundaries. The simulation uses an implicit time integration of the full unsteady compressible flow equations along with the conjugate heat transfer algorithm. For the sake of simulation, the geometry and operating conditions closely follow the experimental setup of Lotton et al. (2009) [5]. A typical run involves about 200,000 computational cells, whereas the working frequency and the applied drive ratio are 592.5 Hz and 2.0%, respectively. The stationary system response is predicted and the numerical values are compared to theory. The results show good agreement with theoretical behavior in the linear regime of drive ratios up to 2.0% while a maximum cooling effect of 10 degrees is captured between the stack ends. This simulation provides an interesting tool for understanding the transient flow behavior, mean energy-flux density and flow streaming, and helps building 3-D computational fluid dynamics models for thermoacoustic devices.

El-Rahman, A. A. I., W. A. Abdelfattah, and M. A. Fouad, "A 3D investigation of thermoacoustic fields in a square stack", International Journal of Heat and Mass Transfer, vol. 108, Part A, pp. 292 - 300, 2017. AbstractWebsite

Abstract The thermoviscous behavior of the oscillating gas within the porous medium of a thermoacoustic refrigerator enables the conversion of sound into heat in the process of typical standing-wave thermoacoustic refrigeration systems. Several nonlinear mechanisms, such as harmonics generation, self-induced streaming and possible turbulence, cause complicated flow behavior and influence the performance of such devices. Few analytical and numerical approximations (Cao et al., 1996; Worlikar and Knio, 1996; Worlikar et al., 1998) describe the flow field and the energy flux density in standing devices comprising stacks of parallel plates, but almost no 3-D simulation has been developed that models the large-amplitude excitations and enables the prediction of the oscillating-flow behavior within a porous medium made of square channels. Here, we build on existing effort (Abd El-Rahman and Abdel-Rahman, 2014) and report a computational fluid dynamics analysis of a Helium-filled half-wavelength thermoacoustic refrigerator. The finite volume method is used, and the solid and gas domains are represented by large numbers of hexahedral elements. The calculations assume a 3-D periodic cell structure to reduce the computational cost and apply the dynamic mesh technique to account for the adiabatically oscillating wall boundaries. The simulation uses an implicit time integration of the full unsteady compressible flow equations along with the conjugate heat transfer algorithm. For the sake of simulation, the geometry and operating conditions closely follow the experimental setup of Lotton et al. (2009) [5]. A typical run involves about 200,000 computational cells, whereas the working frequency and the applied drive ratio are 592.5 Hz and 2.0%, respectively. The stationary system response is predicted and the numerical values are compared to theory. The results show good agreement with theoretical behavior in the linear regime of drive ratios up to 2.0% while a maximum cooling effect of 10 degrees is captured between the stack ends. This simulation provides an interesting tool for understanding the transient flow behavior, mean energy-flux density and flow streaming, and helps building 3-D computational fluid dynamics models for thermoacoustic devices.

Abd El-Rahman, A. I., W. A. Abdelfattah, and M. A. Fouad, "A 3D investigation of thermoacoustic fields in a square stack", International Journal of Heat and Mass Transfer, vol. 108, pp. 292-300, 2017. Abstract
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Roujol, S., T. A. Basha, M. Akçakaya, M. Foppa, R. H. Chan, K. V. Kissinger, B. Goddu, S. Berg, W. J. Manning, and R. Nezafat, "3D late gadolinium enhancement in a single prolonged breath-hold using supplemental oxygenation and hyperventilation", Magnetic resonance in medicine, vol. 72, no. 3, pp. 850–857, 2014. Abstract
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Roujol, S., T. A. Basha, M. Akçakaya, M. Foppa, R. H. Chan, K. V. Kissinger, B. Goddu, S. Berg, W. J. Manning, and R. Nezafat, "3D late gadolinium enhancement in a single prolonged breath‐hold using supplemental oxygenation and hyperventilation", Magnetic resonance in medicine, vol. 72, issue 3, pp. 850-857, 2014. Abstract
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Hemayed, E. E., M. G. H. Mostafa, and A. A. Farag, "3D object reconstruction from a sequence of images using voxel coloring", Electronic Imaging: International Society for Optics and Photonics, pp. 207–214, 2000. Abstract
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Hemayed, E. E., M. G. H. Mostafa, and A. A. Farag, "3D object reconstruction from a sequence of images using voxel coloring", Electronic Imaging: International Society for Optics and Photonics, pp. 207–214, 2000. Abstract
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Hemayed, E. E., M. G. H. Mostafa, and A. A. Farag, "3D object reconstruction from a sequence of images using voxel coloring", Electronic Imaging: International Society for Optics and Photonics, pp. 207–214, 2000. Abstract
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Ahmed, M., S. Yamany, E. Hemayed, S. Ahmed, S. Roberts, and A. Farag, "3D reconstruction of the human jaw from a sequence of images", Computer Vision and Pattern Recognition, 1997. Proceedings., 1997 IEEE Computer Society Conference on: IEEE, pp. 646–653, 1997. Abstract
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Ahmed, M., S. Yamany, E. Hemayed, S. Ahmed, S. Roberts, and A. Farag, "3D reconstruction of the human jaw from a sequence of images", Computer Vision and Pattern Recognition, 1997. Proceedings., 1997 IEEE Computer Society Conference on: IEEE, pp. 646–653, 1997. Abstract
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