Mohamed A W I L Hussein (original) (raw)

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Papers by Mohamed A W I L Hussein

Research paper thumbnail of Médiations numériques et enseignement des sciences sociales dans le contexte éducatif égyptien

Http Www Theses Fr, Dec 19, 2012

Research paper thumbnail of Investigation of Neutrino-Nucleon Interaction through Intermediate Vector Boson (IVB)

Journal of Modern Physics, 2010

This work deals with the interaction of neutrino with the nucleon considering data taken from dif... more This work deals with the interaction of neutrino with the nucleon considering data taken from different experiments. It is assumed that the interaction of neutrino with nucleons go through the intermediate vector boson (IVB) which may be the W or Z with effective mass of the order of 80 GeV. The neutrino wave function is obtained via perturbation technique to calculate the weak leptonic current. On the other hand, the quark current is estimated using the measured experimental data of deep inelastic scattering of neutrino-nucleon interaction. Eventually the total interaction transition matrix is calculated as a function of momentum transfer square, q 2 and qualitatively compared with the available experimental data. Besides, a comparative study is also done to explore the influence of the target composition during the neutrino weak interactions. In this context an investigation of neutrino-proton and neutrino-neutron interactions are carried out to calculate the deep inelastic cross section in both cases.

Research paper thumbnail of Reoperative Hypospadias Repair Based on Urethral Plate Status

UroToday International Journal, 2009

The purpose of the study was to determine the suitable procedure for redo hypospadias repair base... more The purpose of the study was to determine the suitable procedure for redo hypospadias repair based on the status of the urethral plate. METHODS: Thirty-five patients with failed hypospadias repair were evaluated regarding the status of the urethral plate, the meatus, residual chordee, and the available surrounding tissues. The mean patient age was 5.8 years (range, 2-12 years). At presentation, 25 patients had the meatus at the distal shaft, 8 at the midshaft, and 2 had complete neourethral stricture. The urethral plate appeared healthy and wide in 30 patients and narrow in 3 patients. All patients had a straight penis with single previous repair. The initial procedure was unknown in 15 patients and was the tubularized incised plate (TIP) procedure in 20 patients. Thirty patients underwent reoperation with TIP procedure, 3 had a Mathieu technique, and 2 had onlay island flap. After repair, cosmetic and functional outcomes were evaluated. RESULTS: Mean follow-up was 23.2 months (range, 12-36 months). Complete wound dehiscence occurred in 3 (8.6%) cases that had the TIP procedure; they are awaiting further repair. No fistulae occurred. Twenty-seven patients had a vertical slit meatus at the tip of the glans and 5 had a rounded meatus. Calibration was satisfactory in all cases using 8-10 Fr plastic catheters. Uroflowmetry was done in 15 (46.9%) patients and found to be within normal limits, with a Q mean of 9.53 mL/s (range, 5-16 mL/s). CONCLUSIONS: Redo TIP urethroplasty is effective and safe when the urethral plate is healthy. When the urethral plate is narrow or the neourethra is stenosed, other alternatives should be considered for repair.

Research paper thumbnail of Biomass estimation in Pichia pastoris cultures by combined single-wavelength fluorescence measurements

Biotechnology and bioengineering, Nov 9, 2016

In this work, the evolution of different biogenic fluorophores involved in the metabolism of Pich... more In this work, the evolution of different biogenic fluorophores involved in the metabolism of Pichia pastoris was determined at four different single-wavelength pairs (excitation/emission) during batch culture in microwell plates and used for effective and reliable biomass estimation by means of chemometric tools. The chemometric tools for biomass estimation were multiple linear regression (MLR), partial least squares regression (PLSR), and principal component regression (PCR). VIP (variable importance in the projection) scores were used to rate the importance of model input variables, indicating tryptophan as the most important variable for biomass estimation. A direct correlation between the single fluorescence signals of tryptophan and biomass was additionally set up. Results indicate a successful fitting of the MLR, PLSR, PCR, and direct tryptophan correlation models for the present case and confirm the relevance of biogenic fluorophores for bioprocess state variables monitoring....

Research paper thumbnail of Corneal Thickness In Children

American journal of …, 2004

Research paper thumbnail of Médiations numériques et enseignement des sciences sociales dans le contexte éducatif égyptien

Http Www Theses Fr, Dec 19, 2012

Research paper thumbnail of Investigation of Neutrino-Nucleon Interaction through Intermediate Vector Boson (IVB)

Journal of Modern Physics, 2010

This work deals with the interaction of neutrino with the nucleon considering data taken from dif... more This work deals with the interaction of neutrino with the nucleon considering data taken from different experiments. It is assumed that the interaction of neutrino with nucleons go through the intermediate vector boson (IVB) which may be the W or Z with effective mass of the order of 80 GeV. The neutrino wave function is obtained via perturbation technique to calculate the weak leptonic current. On the other hand, the quark current is estimated using the measured experimental data of deep inelastic scattering of neutrino-nucleon interaction. Eventually the total interaction transition matrix is calculated as a function of momentum transfer square, q 2 and qualitatively compared with the available experimental data. Besides, a comparative study is also done to explore the influence of the target composition during the neutrino weak interactions. In this context an investigation of neutrino-proton and neutrino-neutron interactions are carried out to calculate the deep inelastic cross section in both cases.

Research paper thumbnail of Reoperative Hypospadias Repair Based on Urethral Plate Status

UroToday International Journal, 2009

The purpose of the study was to determine the suitable procedure for redo hypospadias repair base... more The purpose of the study was to determine the suitable procedure for redo hypospadias repair based on the status of the urethral plate. METHODS: Thirty-five patients with failed hypospadias repair were evaluated regarding the status of the urethral plate, the meatus, residual chordee, and the available surrounding tissues. The mean patient age was 5.8 years (range, 2-12 years). At presentation, 25 patients had the meatus at the distal shaft, 8 at the midshaft, and 2 had complete neourethral stricture. The urethral plate appeared healthy and wide in 30 patients and narrow in 3 patients. All patients had a straight penis with single previous repair. The initial procedure was unknown in 15 patients and was the tubularized incised plate (TIP) procedure in 20 patients. Thirty patients underwent reoperation with TIP procedure, 3 had a Mathieu technique, and 2 had onlay island flap. After repair, cosmetic and functional outcomes were evaluated. RESULTS: Mean follow-up was 23.2 months (range, 12-36 months). Complete wound dehiscence occurred in 3 (8.6%) cases that had the TIP procedure; they are awaiting further repair. No fistulae occurred. Twenty-seven patients had a vertical slit meatus at the tip of the glans and 5 had a rounded meatus. Calibration was satisfactory in all cases using 8-10 Fr plastic catheters. Uroflowmetry was done in 15 (46.9%) patients and found to be within normal limits, with a Q mean of 9.53 mL/s (range, 5-16 mL/s). CONCLUSIONS: Redo TIP urethroplasty is effective and safe when the urethral plate is healthy. When the urethral plate is narrow or the neourethra is stenosed, other alternatives should be considered for repair.

Research paper thumbnail of Biomass estimation in Pichia pastoris cultures by combined single-wavelength fluorescence measurements

Biotechnology and bioengineering, Nov 9, 2016

In this work, the evolution of different biogenic fluorophores involved in the metabolism of Pich... more In this work, the evolution of different biogenic fluorophores involved in the metabolism of Pichia pastoris was determined at four different single-wavelength pairs (excitation/emission) during batch culture in microwell plates and used for effective and reliable biomass estimation by means of chemometric tools. The chemometric tools for biomass estimation were multiple linear regression (MLR), partial least squares regression (PLSR), and principal component regression (PCR). VIP (variable importance in the projection) scores were used to rate the importance of model input variables, indicating tryptophan as the most important variable for biomass estimation. A direct correlation between the single fluorescence signals of tryptophan and biomass was additionally set up. Results indicate a successful fitting of the MLR, PLSR, PCR, and direct tryptophan correlation models for the present case and confirm the relevance of biogenic fluorophores for bioprocess state variables monitoring....

Research paper thumbnail of Corneal Thickness In Children

American journal of …, 2004