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Search Results: 1 - 10 of 401726 matches for " Faisal M. Alabbas "
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Corrosion Response of Ti6Al4V and Ti15Mo Dental Implant Alloys in the Presence of Listerine Oral Rinse
Rahul Bhola,Charu Chandra,Faisal M. Alabbas,Sukumar Kundu,Brajendra Mishra,David L. Olson
International Journal of Corrosion , 2013, DOI: 10.1155/2013/739841
Abstract: The influence of a commonly used antibacterial mouth rinse, Listerine, on the corrosion behavior of one of the commonly used titanium alloys Ti6Al4V (two-phase structure, i.e., α and β) and a newer Ti15Mo (single β phase) in normal saline solution has been investigated using electrochemical techniques. Interfacial electrochemical changes occurring at the oxide-solution interface have been analysed using EIS circuit modeling. Listerine acts as a corrosion inhibitor for Ti15Mo alloy and a corrosion promoter for Ti6Al4V alloy. 1. Introduction Listerine is a commonly used mouth rinse with antiplaque, anticaries, and antibacterial properties. It is used in several dental applications following periodontal procedures and routine oral prophylaxis. It was awarded the American Dental Association’s seal of recognition in 1987 for its clinical efficacy in plaque control and gingival improvement [1]. Listerine antiseptic, developed by Warner-Lambert, was the first over-the-counter mouth rinse [2]. Listerine contains different essential oils, which are phenolics such as thymol, eucalyptol, menthol, and methyl salicylate and are known to retard plaque buildup and reduce gingivitis [3–10]. Thymol, eucalyptol, and menthol are known to possess proven antibacterial activity and are found in thyme (Thymus vulgaris), eucalyptus (Eucalyptus globulus), and peppermint (Mentha piperita), respectively. Methyl salicylate has anti-inflammatory activity and is found in meadowsweet (Filipendula ulmaria) and willow (Salix spp.) [2]. The effect of Listerine on plaque was ascribed to its bactericidal properties related to the alteration of bacterial cell wall, which has been well documented in vitro and in vivo [11–15]. A newly inserted prosthesis and various surrounding tissues may get exposed to Listerine from minutes to days, depending upon the therapy performed and the local and systemic patient factors. It is thus important to understand the effect of Listerine on the electrochemical and corrosion behavior of titanium alloys in order to predict treatment prognosis. Cestarolli et al. [16] have compared the effect of mouthwashes including Listerine and a simulated body fluid on the corrosion behavior of an Fe-Cr-Ni alloy. The corrosion resistance of this alloy was the highest in the presence of Listerine mouthwash. However, the present study simulates the use of Listerine as an oral prophylactic rinse, in other words, the condition when the concentration of saliva gets altered due to the presence of Listerine in the mouth. The effect of this normal saline-Listerine solution has,
A Targeted Parathyroidectomy Using Guide Wire Technique in a Pregnant Patient with Primary Hyperparathyroidism
E. Kandil,S. Faruqui,J. Alharash,H. Alabbas,B. Rodgers,B. Blank,B. M. Jaffe
International Journal of Otolaryngology , 2009, DOI: 10.1155/2009/361427
Abstract: Primary hyperparathyroidism may cause fetal demise in pregnant patients if prompt diagnosis and treatment is not initiated. The paper describes a novel guide wire technique for a targeted parathyroidectomy, which may reduce the risk to mother and fetus and be useful in other related circumstances.
A 4-Component Dirac Theory of Ionization of Hydrogen Molecular Ion in a Super-Intense Laser Field
F. H. M. Faisal
Physics , 2009, DOI: 10.1088/0953-4075/42/17/171003
Abstract: In this paper a 4-component Dirac theory of ionization of hydrogen molecular ion in a super-intense laser field is developed. Simple analytic expressions for the spin specific as well as the total ionization currents emitted from the ground state of the ion are derived. The results are given for all polarization and finite propagation vectors of the field. They apply for inner-shell ionization of analogous heavier molecular ions as well. The presence of molecular two-slit interference effect, first found in the non-relativistic case, and the spin-flip ionization current, and an asymmetry of the up- and down-spin currents similar to that predicted in the atomic case, are found also to hold for the present relativistic molecular ionic case. Finally, the possibility of controlling the dominant spin currents by selecting the handedness of a circularly polarized incident laser field is pointed out.
Equivalence of the velocity and length gauge perturbation series
F. H. M. Faisal
Physics , 2008,
Abstract: We derive a "master" perturbation expansion for the quantum transition amplitude in a light field between the field-free initial and final atomic states in the minimal-coupling (MC) "velocity" gauge. The result is used to prove that the traditional "velocity" and "length" gauge perturbation series are equivalent infinite series representations or branches of the same amplitude function, that are equal but in a common domain of convergence (if it exists). More generally, we show that they constitute only two members of a one-parameter family of infinitely many branches of the given transition amplitude.
Adiabatic solution of Dirac equation of "graphinos" in an intense electromagnetic field and emission of high order harmonics near the Dirac points
F. H. M. Faisal
Physics , 2011,
Abstract: We obtain a class of adiabatic solutions of Dirac equation for the charged massless relativistic quasi-particles that arise from the low-energy excitations \cite{foot-1} in a 2D graphene sheet, interacting with an electromagnetic field. The analytic solutions obtained are useful for {\it non-perturbative} investigation of processes in intense laser fields. As a first example we employ them to predict copious emissions of high order harmonics by THz lasers interacting with the occupied states of graphinos in the vicinity of the degenerate Dirac points. The relative intensity of the emitted harmonics is seen to decrease by only about two orders of magnitude from the 3rd to the 81st harmonic order, and is characterized by two phenomena of "revival" and "plateau" formation in the middle and the far end of the spectrum calculated. A preliminary comparison is made for harmonic emission from 2D graphene that reveals a qualitatively different spectrum in the latter case showing a sharp cutoff at an order $n_{cutoff} = \frac{\omega_B}{\omega}$ where $\omega_B=eF_0b/\hbar$ is the so-called Bloch frequency.
Approximation by Kantorovich type (p,q)-Bernstein-Schurer Operators
M. Mursaleen,Faisal Khan
Mathematics , 2015,
Abstract: In this paper, we introduce a Shurer type genaralization of (p,q)-Bernstein-Kantorovich operators based on (p,q)-integers and we call it as (p,q)-Bernstein-Schurer Kantorovich operators. We study approximation properties for these operators based on Korovkin's type approximation theorem and also study some direct theorems. Furthermore, we give comparisons and some illustrative graphics for the convergence of operators to some function.
Studies on Photocatalytic Degradation of Acridine Orange and Chloroform Sensing Using As-Grown Antimony oxide Microstructures  [PDF]
Aslam Jamal, Mohammed M Rahman, M. Faisal, Sher Bahadar Khan
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.26093
Abstract: Flower shaped antimony oxide (Sb2O3) microstructures were synthesized in a large quantity via simple solution method using aqueous mixtures of antimony chloride and hexamethylene diamine (HMDA). The morphological characterizations were done by field emission scanning electron microscopy (FESEM), which revealed that the synthesized products possess flower-shaped microstructures. The detailed structural characterizations performed by X-ray diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR) and Raman spectrophotometer confirmed that the synthesized microstructures are well-crystalline antimony oxide. The Energy dispersive spectroscopy (EDS) shows that the grown products are composed of Sb and O. Optical properties of the synthesized products were characterized by UV-Visible spectrophotometer which exhibits a well defined peak at ~ 291.0 nm. The photo-catalytic activity of the Sb2O3 microstructures was evaluated by degradation of acridine orange (AO), which mineralized almost 63.0% in 150 min. The chemical sensing properties of Sb2O3 microstructures was also studied by I-V technique using chloroform as a detecting solvent. The fabricated chloroform sensor demonstrates good sensitivity of 0.1154 µA cm–2 mM–1, lower-detection limit (~0.1 mM), large-linear dynamic range (LDR, 0.122 mM to 1.22 M) with linearity (R = 0.7898) in short response time (10.0 sec).
Natural Language Inference for Arabic Using Extended Tree Edit Distance with Subtrees
Maytham Alabbas,Allan Ramsay
Computer Science , 2014, DOI: 10.1613/jair.3892
Abstract: Many natural language processing (NLP) applications require the computation of similarities between pairs of syntactic or semantic trees. Many researchers have used tree edit distance for this task, but this technique suffers from the drawback that it deals with single node operations only. We have extended the standard tree edit distance algorithm to deal with subtree transformation operations as well as single nodes. The extended algorithm with subtree operations, TED+ST, is more effective and flexible than the standard algorithm, especially for applications that pay attention to relations among nodes (e.g. in linguistic trees, deleting a modifier subtree should be cheaper than the sum of deleting its components individually). We describe the use of TED+ST for checking entailment between two Arabic text snippets. The preliminary results of using TED+ST were encouraging when compared with two string-based approaches and with the standard algorithm.
MASW Survey with Fixed Receiver Geometry and CMP Cross-Correlation Technique for Data Processing: A Case Study of Wadi Fatima, Western Saudi Arabia  [PDF]
Faisal Rehman, Sherif M. El-Hady, Muhammad Faisal, Hussein M. Harbi, Muhammad Fahad Ullah, Saifur Rehman, Muhammad Kashif
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.85027
Abstract: Multichannel analysis of surface waves is a noninvasive technique for subsurface shear wave velocity imagining. This method is one of the most effective geophysical tools for geotechnical investigations. In this paper, we present multichannel surface wave data acquisition in a non-conventional manner in alluvium deposits. Fixed receiver and multi-source offset geometry were applied to obtain field data. The data processing comprised of generating CMP cross-correlated traces and then inversion to obtain dispersion curves. The inversion of dispersion curves is achieved by employing a genetic algorithm to obtain subsurface shear wave velocity. Finally, the one-dimensional shear wave models are obtained. The multi-source offset data acquisition with fixed receiver geometry technique in combination with CMP cross-correlation gathers for data processing worked in a quite efficient way to obtain subsurface shear wave model.
A New Double Bagging via the Support Vector Machine with Application to the Condition Diagnosis for the Electric Power Apparatus
Faisal M. Zaman,Hideo Hirose
Lecture Notes in Engineering and Computer Science , 2009,
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