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Search Results: 1 - 10 of 462298 matches for " A. Sulaiman "
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Mathematical Modeling in Heavy Traffic Queuing Systems  [PDF]
Sulaiman Sani, Onkabetse A. Daman
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.46033
Abstract: In this article, modeling in queuing systems with heavy traffic customer flows is reviewed. Key areas include their limiting distributions, asymptotic behaviors, modeling issues and applications. Heavy traffic flows are features of queuing in modern communications, transportation and computer systems today. Initially, we reviewed the onset of asymptotic modeling for heavy traffic single server queuing systems and then proceeded to multi server models supporting diffusion approximations developed recently. Our survey shows that queues with heavy traffic customer flows have limiting distributions and extreme value maximum. In addition, the diffusion approximation can conveniently model performance characters such as the queue length or the waiting time distributions in these systems.
Basic Limit Theorems for Light Traffic Queues & Their Applications  [PDF]
Onkabetse A. Daman, Sulaiman Sani
American Journal of Operations Research (AJOR) , 2015, DOI: 10.4236/ajor.2015.55034
Abstract: In this paper, we study some basic limit theorems characterizing the stationary behavior of light traffic queuing systems. Beginning with limit theorems for the simple M/M/1 queuing system, we demonstrate the methodology for applying these theorems for the benefit of service systems. The limit theorems studied here are dominant in the literature. Our contribution is primarily on the analysis leading to the application of these theorems in various problem situations for better operations. Relevant Examples are included to aid the application of the results studied in this work.
Large amplitude of the internal motion of DNA immersed in bio-fluid
A. Sulaiman
Physics , 2005,
Abstract: The interaction between large internal motion of DNA surrounded by bio-fluid is investigated. The phenomenon is modelled using the relativistic Navier-Stokes lagrangian describing the bio-fluid coupled to the standard Klein-Gordon lagrangian describing the DNA. It is shown that the equation of motion at non-relativistic limit, v << c, reproduces the well-known Sine-Gordon equation. The effect of the interaction in a single soliton solution is also given and discussed.
Using Harmonic Mean to Solve Multi-Objective Linear Programming Problems  [PDF]
Nejmaddin A. Sulaiman, Rebaz B. Mustafa
American Journal of Operations Research (AJOR) , 2016, DOI: 10.4236/ajor.2016.61004
Abstract:

In this paper, we have suggested a new technique to transform multi-objective linear programming problem (MOLPP) to the single objective linear programming problem by using Harmonic mean for values of function and an algorithm is suggested for its solution, the computer application of algorithm has been demonstrated by solving some numerical examples. We have used some other techniques, such as (sen, arithmetic mean, median) to solve the same problems, the results in Table 3 indicate that the new technique in general is promising.

PROTECTIVE EFFECTS OF MELATONIN AGAINST IDIOSYNCRATIC LIVER INJURY IN RATS CHALLENGED WITH CHLORPROMAZINE AND LIPOPOLYSACCHARIDE
Sulaiman Amal A
International Research Journal of Pharmacy , 2011,
Abstract: The episode of inflammation during drug treatment predispose animals to tissue injury, raising the possibility that presence or absence of inflammation is an important susceptibility factor for drug toxicity in human , and this phenomenon is hypothesized to be related to idiosyncratic drug reactions. The present study was designed to investigate the possible protective effect of orally administered melatonin against hepatic injury in rats concurrently treated with chlorpromazine (CPZ) and lipopolysaccharides (LPS). The protective effect of melatonin was studied through treatment of rats with single oral dose (10mg/kg), given seven days before and during the day of exposure to both CPZ and LPS. The animals were sacrificed 24 hrs post-challenge with LPS. Hepatic necrosis and cholestasis were assessed by measuring the activities of serum liver enzymes ALT, AST and ALP; in addition, total and direct bilirubin along with evaluation of histological alteration in hepatic tissue. The oxidative stress markers were assessed by measuring the levels of MDA and GSH in hepatic tissue homogenate. Analysis of data showed that melatonin supplementation attenuated markers of oxidative stress by reducing the levels of MDA and restoring GSH levels; melatonin also improved the observed biochemical and histological changes associated with exposure to CPZ and LPS. In conclusion, orally administered melatonin at pharmacological doses have promising protective effects against drug-induced idiosyncratic liver injury that may be of value in clinical practice.
The Effect of Varied Dietary Crude Protein Levels with Balanced Amino Acids on Performance and Egg Quality Characteristics of Layers at First Laying Phase  [PDF]
Gbemiga Oladimeji Adeyemo, Sulaiman Adewole Abioye, Foluke A. Aderemi
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.34074
Abstract: Four diets were formulated to study the influence of varying crude protein levels on the performance, egg quality, serum and haematological characteristics at the first phase of laying cycle of sixty Bovan Nera laying birds that were randomly allotted to dietary treatments. The four experimental diets had five replicates each and three birds per repli-cate. Diet 1 contained 14% crude protein (CP), while diet 2 contained 15% CP, diets 3 and 4 contained 16% and 17% CP respectively. The experimental birds were fed for 10 weeks and the data collected were statistically analysed. Apparent variations recorded for all the performance characteristics such as Egg number, Hen-day production, Feed Conversion Ratio (FCR) and weight gain were significantly different (p < 0.05). The best FCR value were recorded by birds fed 17% CP (3.45), while the highest weight gain mean value were also recorded by birds fed 17% CP value. Findings indicated a direct relationship between dietary crude protein values and performance.
Method of Images to Study the Charge Distribution in Cases of Potentials Deviating from Coulomb’s Law  [PDF]
Abdulwahab K. Sallabi, Jamal A. Khaliel, Ali Sulaiman Mohamed
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2014, DOI: 10.4236/jemaa.2014.64008
Abstract:

The method of images is used to study the charge distribution for cases where Coulomb’s law deviates from the inverse square law. This method shows that in these cases some of the charge goes to the surface, while the remainder charge distributed over the volume of the conductor. In accord with the experimental work, we show that the charge distribution will depend on the photon rest mass and is very sensitive to it; a very small value of the rest of mass of the photon will create deviation from Coulomb’s law.

Compressive Strength and Abrasion Resistance of Concretes under Varying Exposure Conditions  [PDF]
Adekunle P. Adewuyi, Ismaila A. Sulaiman, Joseph O. Akinyele
Open Journal of Civil Engineering (OJCE) , 2017, DOI: 10.4236/ojce.2017.71005
Abstract:
The purpose of this study is to comparatively evaluate the wear resistance of concretes under abrasion rates. Five concrete mix proportions of a fixed water-cement ratio of 0.45 were considered in the study, but the constituent materials, age of concrete and exposure contact conditions were varied. The coarse aggregate type employed in the study was crushed granite. The compressive strength and abrasion resistance of concretes were tested between at ages 7 to 70 days and 100 - 500 revolutions of abrasion wheels respectively. The study revealed that the compressive strength and abrasion resistance had the optimal performance when the coarse aggregate content was 45% and the worst performance when the fine aggregate content was 28.7% of the total weight of concrete constituents. There was a remarkable loss of concrete particles to wear between 200 revs and 300 revs of abrasion wheel contact. Concrete grade in excess of 60 N/mm2 is required to resist abrasion beyond 200 revolutions of abrasion wheel contact on concrete specimens. Concretes investigated also showed weak resistance to deep abrasion at and above 300 revolutions of abrasion wheel contact.
Infectious Bronchitis Vaccination Protocols for Laying Hens
A. Sulaiman,J. R. Roberts
Media Peternakan , 2011,
Abstract: A research was conducted to investigate the effects of vaccination protocols for Infectious Bronchitis (IB) on egg production, egg quality, and IB antibody titres of laying hens. Different initial vaccination (Control, VicS eye, VicS spray, VicS water, A3 eye, A3 spray, and A3 water) for IB were administered to day-old Isa Brown hens. Half the hens were revaccinated regularly during lay whereas the other hens were not vaccinated. Results showed that initial vaccination treatment had significant effects on hen day egg production and egg quality of egg weight, shell reflectivity, shell breaking strength, shell thickness, albumen height, Haugh Units, and IB antibody titre levels, but had no effect on percentage of shell and yolk colour. Egg weight and shell reflectivity were less favourable in the control hens. In contrast, shell breaking strength and shell thickness were highest for the group that initially received A3 vaccine in water. However, regular revaccination had some deleterious effects on egg production and egg quality. There were no significant effects of revaccination on IB antibody titres. It is concluded that there was little advantage in regularly revaccinating laying hens for IB virus, since they had received appropriate initial vaccination.
Lagrangian dynamics of the Navier-Stokes equation
A. Sulaiman,L. T. Handoko
Physics , 2005,
Abstract: Most researches on fluid dynamics are mostly dedicated to obtain the solutions of Navier-Stokes equation which governs fluid flow with particular boundary conditions and approximations. We propose an alternative approach to deal with fluid dynamics using the lagrangian. We attempt to develop a gauge invariant lagrangian which reconstructs the Navier-Stokes equation through the Euler-Lagrange equation. The lagrangian consists of gauge boson field $\A_\mu$ with appropriate content describing the fluid dynamics, i.e. $\A_\mu = (\Phi, -\uv)$. An example of applying the lagrangian to the interaction of fluid in a solitonic medium is also given.
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