Search Results - "Kotb, M.S."

Characterizations of probability distributions via bivariate regression of generalized order statistics by Kotb, M. S., Ahsanullah, M.

“…Let X i,n,m,k , i = 1,..., n are n generalized order statistics (gos) based on an absolutely continuous distribution function F. Suppose that ø ( x ) is an…”
Get full text

Retraction notice to “The structural, optical, magnetic and photocatalytic properties of transition metal ions doped TiO2 nanoparticles” [J. Alloy. Compd. 581 (2013) 71–78] by Rashad, M.M., Elsayed, E.M., Al-Kotb, M.S., Shalan, A.E.

Get full text

Estimation of the stress–strength reliability for the exponential-Rayleigh distribution by Kotb, M.S., Al Omari, M.A.

“…In this current paper, we consider the problem of estimating the stress–strength parameter ψ=P(X<Y). This is done by using Bayesian and non-Bayesian approaches…”
Get full text

Statistical inference for modified Weibull distribution based on progressively type-II censored data by Kotb, M.S., Raqab, M.Z.

“…In the context of survival and medical studies, it sounds more natural to have situations where the removal of units prior to failure is preplanned for cost or…”
Get full text

Tailoring the optical characteristics and band-gap of BG doped PMMA/FTO nanocomposite films for laser power attenuation: New approach by Al-Kotb, M.S., Farag, A.A.M., Yahia, I.S.

“…Herein a good adherent film of PMMA doped with the various ratio of BG-dye deposited on optically flat FTO-substrates by using a well-controlled spin coating…”
Get full text

Investigation on microstructural and optical properties of nano-crystalline CdSe thin films by Al-Kotb, M.S., Al-Waheidi, Jumana Z., Kotkata, M.F.

“…In this work, nano-crystalline CdSe thin films were deposited by thermal evaporation technique from CdSe nano-powders on glass substrates. The deposited films…”
Get full text

Synthesis, surface properties and inhibition behavior of novel cationic gemini surfactant for corrosion of carbon steel tubes in acidic solution by Hegazy, M.A., Rashwan, S.M., Kamel, M.M., El Kotb, M.S.

“…In the present investigation a novel gemini surfactant namely N,N՝-((oxalylbis(oxy))bis(ethane-2,1-diyl))bis(N,N-dimethyldodecan-1-aminium bromide) was…”
Get full text

Stretchable memory loops and photovoltaic characteristics of organic-inorganic solid-state iron (III) chloride tetraphenyl porphyrin /p-Si(111) nanostructure devices by Nawar, Ahmed M., Yahia, I.S., Al-Kotb, M.S.

“…The configuration of the fabricated Ag/FeTPPCl/p-Si/Al device, and the picked-up SEM micrograph declares that; the annealed FeTPPCl thin films at 350 ᵒC have a…”
Get full text

Inference and prediction for modified Weibull distribution based on doubly censored samples by Kotb, M.S., Raqab, M.Z.

“…In this article, inference for the modified Weibull (MW) distribution under type-II doubly censored sample is discussed. Maximum likelihood estimator (MLE) and…”
Get full text

Deposition of nanostructured methyl violet-10B films/FTO: Optical limiting and optical linearity/nonlinearity by El-Zaidia, E.F.M., Al-Kotb, M.S., Yahia, I.S.

“…Methyl violet-10B (MV-10B) nanostructured thin films are deposited onto highly cleaned conductive fluorine-doped SnO2 substrates (FTO) using cost-effective…”
Get full text

Fabrication and electrical characterization of the InSbS3/n-Si heterojunction by El Radaf, I.M., Al-Kotb, M.S., Nasr, Mahmoud, Yahia, I.S.

“…In this article, polycrystalline InSbS3 thin films were fabricated successfully at first time on the n-Si wafer by spray pyrolysis system to produce…”
Get full text

Physico-chemical properties of acid fuchsin as novel organic semiconductors: Structure, optical and electrical properties by El-Zaidia, E.F.M., Al-Kotb, M.S., Yahia, I.S.

“…Acid fuchsin is a new organic semiconductor. The results of XRD measurements confirmed that acid fuchsin is polycrystalline in nature with a triclinic crystal…”
Get full text

Nanostructure and enhancement of the optical properties of Tb-doped NiO for photodiode applications by Farag, A.A.M., Yahia, I.S., Al-Kotb, M.S.

“…•High-quality thin films of pure NiO and doped Tb% were obtained by low cost dip-coating.•The plasma frequency of these NiO thin films was extracted for the…”
Get full text

RETRACTED: The structural, optical, magnetic and photocatalytic properties of transition metal ions doped TiO2 nanoparticles by Rashad, M.M., Elsayed, E.M., Al-Kotb, M.S., Shalan, A.E.

Get full text

Positron annihilation Lifetime and Fourier transform infrared spectroscopic studies on Bi2O3–B2O3 glasses by Mohsen, M., Gomaa, E., Al-Kotb, M.S., Abdel-Baki, M., Fathy, N.

“…Bismuth borate glasses with compositions x (Bi2O3)×(100−x) (B2O3) (where x is in mol. % ranging from 25 to 50 in steps of 5) have been prepared by using melt…”
Get full text

Model-free transformation kinetics for ZnS quantum dots synthesized via colloidal reaction by Mansour, Sh.A., Al-Kotb, M.S., Kotkata, M.F.

“…Zinc sulfide (ZnS) quantum dots (QDs) were prepared by a simple non-toxic colloidal reaction of zinc acetate dehydrate and sodium sulfate in the presence of…”
Get full text

Effect of In-content on the optical properties of a-Se films by Kotkata, M.F., Abdel-Wahab, F.A., Al-Kotb, M.S.

“…The optical transmission spectra of amorphous (a-) Se 1− x In x films, with x = 0.0, 0.05, 0.18 and 0.35, that prepared by thermal evaporation from their…”
Get full text

Opto-electronic characterizations of oriented nano-structure CdSe film/Si (001) heterostructure by Al-Kotb, M.S., Al-Waheidi, Jumana Z., Kotkata, M.F.

“…[Display omitted] •Preferred orientation wurtzite-CdSe films were successfully grown on p-Si (001).•Two direct optical transitions observed: (i) 1.71±0.03eV;…”
Get full text

Gold Schottky contacts on (002) CdSe films growing on p-type silicon wafer by Al-Kotb, M.S., Zamel Al-Waheidi, J., Kotkata, M.F.

“…► Structural and I–V–T characterization of Au/CdSe/p-Si/Al heterostructure. ► Study of Au/CdSe Schottky interface. ► Relation between Schottky barrier heights…”
Get full text

Electrical and optical studies on amorphous CuInSe 2 films by Kotkata, M.F., Kandil, K.M., Al-Kotb, M.S.

“…The composition, homogeneity and amorphous state of CuInSe 2 films of thickness 0.7 to 1.0 μm were determined by EDAX (energy dispersion analysis X-ray) and…”
Get full text