ahmed jamal - Academia.edu (original) (raw)
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Papers by ahmed jamal
New England Journal of Medicine
group clinical trials of new agents: some design considerations. Clin Cancer Res 2008; 14: 4368-7... more group clinical trials of new agents: some design considerations. Clin Cancer Res 2008; 14: 4368-71. 2. Asch DA, Sheils NE, Islam MN, et al. Variation in US hospital mortality rates for patients admitted with COVID-19 during the first 6 months of the pandemic. JAMA Intern Med 2020 December 22 (Epub ahead of print). 3. Korn EL, Freidlin B. Outcome-adaptive randomization: is it useful?
Electrical and Computer Engineering (ICECE), 2012 7th International Conference on
Necessity for improved calculation of bandgap energies of semiconducting single wall carbon nanot... more Necessity for improved calculation of bandgap energies of semiconducting single wall carbon nanotubes is discussed. An effective empirical equation for nearest neighbor hopping parameter ( γ0) in tight binding model of carbon nanotube is proposed in terms of nanotube diameter and chiral index combination. Bandgap energies of all semiconducting single-wall carbon nanotubes in between theoretical minimum and maximum diameter range are calculated from simplest tight binding model using this empirical γ0. Calculated bandgap values excellently match with experimental results over the full diameter range. The proposed hopping parameter greatly improves tight binding model, and remove its quantitative failure in predicting bandgap energy of nanotube.
New England Journal of Medicine
group clinical trials of new agents: some design considerations. Clin Cancer Res 2008; 14: 4368-7... more group clinical trials of new agents: some design considerations. Clin Cancer Res 2008; 14: 4368-71. 2. Asch DA, Sheils NE, Islam MN, et al. Variation in US hospital mortality rates for patients admitted with COVID-19 during the first 6 months of the pandemic. JAMA Intern Med 2020 December 22 (Epub ahead of print). 3. Korn EL, Freidlin B. Outcome-adaptive randomization: is it useful?
Electrical and Computer Engineering (ICECE), 2012 7th International Conference on
Necessity for improved calculation of bandgap energies of semiconducting single wall carbon nanot... more Necessity for improved calculation of bandgap energies of semiconducting single wall carbon nanotubes is discussed. An effective empirical equation for nearest neighbor hopping parameter ( γ0) in tight binding model of carbon nanotube is proposed in terms of nanotube diameter and chiral index combination. Bandgap energies of all semiconducting single-wall carbon nanotubes in between theoretical minimum and maximum diameter range are calculated from simplest tight binding model using this empirical γ0. Calculated bandgap values excellently match with experimental results over the full diameter range. The proposed hopping parameter greatly improves tight binding model, and remove its quantitative failure in predicting bandgap energy of nanotube.