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Search Results: 1 - 10 of 467716 matches for " Badradeen A. A. Adam "
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A Comparative Study of Adomain Decompostion Method and He-Laplace Method  [PDF]
Badradeen A. A. Adam
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.521312
Abstract: In this paper, we present a comparative study between the He-Laplace and Adomain decomposition method. The study outlines the significant features of two methods. We use the two methods to solve the nonlinear Ordinary and Partial differential equations. Laplace transformation with the homotopy method is called He-Laplace method. A comparison is made among Adomain decomposition method and He-Laplace. It is shown that, in He-Laplace method, the nonlinear terms of differential equation can be easy handled by the use He’s polynomials and provides better results.
Design Optimization of Reinforced Concrete Frames  [PDF]
Abobakr A. A. Aga, Fathelrahman M. Adam
Open Journal of Civil Engineering (OJCE) , 2015, DOI: 10.4236/ojce.2015.51008
Abstract: In this paper, a design optimization for the reinforced concrete plane frame structure has been done in order to minimize the cost of the concrete and steel for beams and columns by adopting the Artificial Neural Network (ANN) computational model trough the NeuroShell-2 software program. The design procedure conforms to the ACI-318-08 Code. The variables used for design optimization are the width, depth and the area of reinforced steel, including longitudinal reinforcement and shear reinforcement. A three-bay two-story RC frame is modeled with selecting different span length and different load cases. Acceptable design results are obtained from more than 50 examples which are subjected to all the constraints of the ACI Code, using different cross-section sizes and these results are used to train the NeuroShell-2 program. The results obtained demonstrate the efficiency of the ANN procedure for the multi story RC frame design.
Enhancing the Yields of Phenolic Compounds during Fermentation Using Saccharomyces cerevisiae Strain 96581  [PDF]
Adam A. Banach, Beng Guat Ooi
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.521218
Abstract: Phenylethanol, tyrosol, and tryptophol are phenolic compounds or fusel alcohols formed via the Ehrlich pathway by yeast metabolism. These compounds can yield health benefits as well as contribute to the flavors and aromas of fermented food and beverages. This research shows that Saccharomyces cerevisiae Strain 96581 is capable of producing significantly higher levels of these three compounds when the precursor amino acids were supplemented into either the Chardonnay concentrate for wine-making or the malt concentrate for brewing English Ale. Strain 96581 can produce phenylethanol, tyrosol, and tryptophol as high as 434 mg/kg, 365 mg/kg, and 129 mg/kg, respectively, in the beer fermentation. The performance of Ale yeast WLP002 from White Labs Inc. was also analyzed for comparison. Strain 96581 outperformed WLP002 in the control beer, the amino acids supplemented beer, and the kiwi-beer background. This shows that Strain 96581 is more effective than WLP002 in converting the malt and the kiwi fruit supplements via its endogenous enzymes.
Analysis of Road Traffic Accident Costs in Sudan Using the Human Capital Method  [PDF]
Adam I. A. Mofadal, Kunnawee Kanitpong
Open Journal of Civil Engineering (OJCE) , 2016, DOI: 10.4236/ojce.2016.62019
Abstract: In this study, we used the Human Capital (HC) accident analysis method, to determine the road traffic accident costs in Sudan in two successive years (2010 and 2011) with slight modifications to the recommended and known framework in the way it handles currently and future accident cost components. We evaluated and compared the significance and impact of the economic loss caused by road traffic accidents in Sudan using detailed information on road traffic accident casualties, classified by severity level, vehicle type, and other key parameters such as discount rates and medical and insurance information for Sudan in its entirety. The total cost of road traffic accidents in Sudan in 2010 was estimated at US $391 million, which represents 0.57% of the Gross Domestic Product (GDP), while in 2011 the cost was calculated to reach US $413 million, representing 0.62% of GDP. Findings show that the amount of accident costs is estimated to a certain extent at less than 1% of the total GDP of the country in the two estimation years, but we believe that the evaluation process used fulfilled the eligibility criteria of HC studies and that the produced values for Sudan are valid and reliable. Unit costs for each crash severity level were also estimated in the two years such as death, disability, serious injury, slight injury, and vehicle damage. Death or fatality was equal to US $38,932 and 39,508; disability was equal to US $43,113 and US $45,165; serious injury was equal to US $6963 and US $7596; slight injury was equal to US $2570 and US $3198 and vehicle damage only was equal to US $2268 and US $2579 in the assessment years 2010 and 2011, respectively.
Seismic Evaluation and Retrofitting of Existing Hospital Building in the Sudan  [PDF]
A. E. Hassaballa, M. A. Ismaeil, Fathelrahman M. Adam
Open Journal of Civil Engineering (OJCE) , 2014, DOI: 10.4236/ojce.2014.42014
Abstract: Sudan is not free from earthquakes. It has experienced many earthquakes during the recent history, and the previous studies on this field demonstrated this argument. This paper focuses on the study of seismic performance of existing hospital buildings in Sudan. The paper focused on studying design of reinforced concrete columns of a hospital building considering two load cases; case one is the design load including combinations of dead, live and wind loads and case two includes dead, live and seismic loads. The building was designed according to the Regulation of Egyptian Society for Earthquake Engineering (ESEE), using the linear static method (equivalent static method). The analysis and design were performed using the SAP2000 version 14 software package. The design results obtained from the two cases of loading were compared observing that the design based on case one was unsafe to withstand the additional load came from earthquake, because the cross sections and area of steel for the most of building columns are under the required values that needed to resist the loads of case two. If the building is constructed according to the design using the loadings of case one, this situation needs remedy. This paper suggested two solutions for this problem based on strengthening the weak columns by inserting reinforced concrete shear walls in the direction of y axis affected by seismic load. Solution one suggests shear walls of length 2.5 m with different wall thicknesses (15 cm, 20 cm, 25 cm and 30 cm), whereas solution two suggests shear walls of length 4.5 m and 15 cm width. It was found that solution one solved the problem partially because some columns were still unsafe, but solution two solved the problem completely and all columns were safe.
Seismic Analysis of a Ten-Storey Reinforced Concrete Building in Jazan Area, KSA  [PDF]
A. E. Hassaballa, Fathelrahman Mohammed Adam, M. A. Ismaeil
Open Journal of Civil Engineering (OJCE) , 2017, DOI: 10.4236/ojce.2017.72016
Abstract: Jazan area is located in the most active seismic zone region of the Kingdom of Saudi Arabia where there is a complicated geological structures and tectonics. This project reviews the seismic activities occurred in Jazan area together with reviewing the Saudi Building (Seismic) Code (SBC-301-2007) [1]. A multi-story reinforced concrete building, in Jazan city, was seismically analyzed using the Equivalent Lateral Force Procedure with the aid of STAAD PRO software. The building, which was Ordinary Reinforced Concrete Moment Resisting Frame (ORCMRF), was analyzed in compliance with the provisions of (SBC-301-2007) [1]. The most important parameters governing the analysis of this frame were dead load, live load and seismic loads. Seismic loads were computed as pairs of accelerations versus times. The damping ratio was taken as 0.05 (5% of the critical damping). The ground accelerations versus time periods were calculated using SBC-301-2007 together with parameters necessary to be used as input data for the program to calculate the seismic parameters, i.e., reactions, displacements, base shear, bending moments, shearing forces, drifts. The obtained results show effects of earthquake ground motions on building studied herein are so greater for the higher increases of the values of outputs resulting from seismic loads comparing to that due to static load only. Finally, the results obtained, clearly, show the importance of taking the Saudi seismic code provisions into account when analyzing and designing multi-story buildings in Jazan area.
The nuclear pore complex
Stephen A Adam
Genome Biology , 2001, DOI: 10.1186/gb-2001-2-9-reviews0007
Abstract: The nuclear pore complex (NPC) forms the conduit for the exchange of information between the nucleus and cytoplasm. NPC structures of amazingly similar appearance have been identified in all eukaryotes from yeast to human, yet differences in NPCs between species are likely to provide important clues to NPC function. As the exclusive site of macromolecular traffic between the nucleus and cytoplasm, the NPC provides an important control point for the regulation of gene expression. Precisely how the NPC regulates the traffic of ions and macromolecules remains a topic of speculation and has become the primary research focus of a number of laboratories in recent years. Recent advances towards the identification and characterization of all NPC components by proteomics and genomics, as well as studies of NPCs in vitro, have propelled the field rapidly forward, and are discussed in this article.Nuclear pore complexes are proteinaceous structures embedded in the double membrane of the nuclear envelope. In order to understand how the NPC functions, it is useful to examine the similarities and differences between NPCs from the yeast Saccharomyces cerevisiae and the frog Xenopus laevis. The NPC is a large structure with a molecular weight of approximately 125 MDa in vertebrates and 66 MDa in yeast [1,2]. A vertebrate cell nucleus contains on the order of 2,000 NPCs, whereas the smaller yeast nucleus contains approximately 200. NPCs have eight-fold rotational symmetry through the central axis of the pore and two-fold mirror symmetry through the plane of the nuclear envelope, suggesting assembly as a modular structure, a notion that is supported by structural and biochemical analysis of pore complex assembly in vitro [3,4].In addition to their difference in size, yeast NPCs (yNPCs) and vertebrate NPCs (vNPCs) differ in several fundamental structural features. The main mass of the vNPC is contained in a three-part structure that surrounds and supports a central transporter (see Fi
Complexes of Th(IV), Zr(IV) and V(IV) with Norfloxacin: Synthesis, Spectroscopic, Thermal, Kinetic Measurements and Antimicrobial Evaluation
Abdel Majid A. Adam
Journal of Materials Science Research , 2012, DOI: 10.5539/jmsr.v1n1p167
Abstract: M(IV) complexes of thorium, zirconium, and vanadium with norfloxacin were synthesized and characterized with physical and spectroscopic techniques, including elemental analysis (C,H,N), IR, electronic, 1H NMR spectral methods, as well as thermogravimetric (TG) and differential thermogravimetric (DTG) analyses. Based on these studies, the proposed structure of the obtained complexes are [Th(NFX)2Cl4], [Zr(NFX)2Cl2]Cl2 and [VO(NFX)2]SO4 (where, NFX: norfloxacin). In all complexes, norfloxacin acts as a bidentate deprotonated ligand bound to the metal through the pyridone and one carboxylate oxygen atoms, forming eight, six, five atoms ring with Th (IV), Zr(IV) and V(IV) metal ions, respectively. The kinetic thermodynamic parameters, such as, activation energy, E*, enthalpy, DH*, entropy, DS*, and Gibbs free energy, DG*, have been calculated from the TG and DTG curves, using Coats-Redfern and Horowitz-Metzger methods. Norfloxacin as well as their metal complexes were also evaluated for their antibacterial activity against several bacterial species, such as Bacillus subtilis, Pseudomonas aeruginosa (P. aeruginosa), and Escherichia coli (E. coli) and antifungal screening was studied against three species: Aspergills flavus, Fusarium solani, and Penicillium verrcosum (P. verrcosum). The results show significant increase in antibacterial and antifungal activity of metal complexes as compared to the NFX itself.
Collective excitations of trapped Fermi or Bose gases
A. Csordas,Z. Adam
Physics , 2005, DOI: 10.1103/PhysRevA.74.035602
Abstract: A new method is developed to calculate all excitations of trapped gases using hydrodynamics at zero temperature for any equation of state $\mu=\mu(n)$ and for any trapping potential. It is shown that a natural scalar product can be defined for the mode functions, by which the wave operator is hermitian and the mode functions are orthogonal. It is also shown that the Kohn-modes are exact for harmonic trapping in hydrodynamic theory. Excitations for fermions are calculated in the BCS-BEC transition region using the equation of state of the mean-field Leggett-model for isotrop harmonic trap potential.
Rainbows in homogeneous and radially inhomogeneous spheres: connections with ray, wave and potential scattering theory
John A. Adam
Physics , 2014,
Abstract: This chapter represents an attempt to summarize some of the direct and indirect connections that exist between ray theory, wave theory and potential scattering theory. Such connections have been noted in the past, and have been exploited to some degree, but in the opinion of this author, there is much more yet to be pursued in this regard. This article provides the framework for more detailed analysis in the future. In order to gain a better appreciation for a topic, it is frequently of value to examine it from as many complementary levels of description as possible, and that is the objective here. Drawing in part on the work of Nussenzveig, Lock, Debye and others, the mathematical nature of the rainbow is discussed from several perspectives. The primary bow is the lowest-order bow that can occur by scattering from a spherical drop with constant refractive index n, but zero-order (or direct transmission) bows can exist when the sphere is radially inhomogeneous. The refractive index profile automatically defines a scattering potential, but with a significant difference compared to the standard quantum mechanical form: the potential is k-dependent. A consequence of this is that there are no bound states for this system. The correspondences between the resonant modes in scattering by a potential of the well-barrier type and the behavior of electromagnetic rays in a transparent (or dielectric) sphere are discussed. The poles and saddle points of the associated scattering matrix have quite profound connections to electromagnetic tunneling, resonances and bows arising within and from the sphere. The links between the various mathematical and physical viewpoints are most easily appreciated in the case of constant n, thus providing insight into possible extensions to these descriptions for bows of arbitrary order in radially inhomogeneous spheres (and cylinders).
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