Tripoli, Libya

University of Tripoli
Tripoli, Libya

University of Tripoli , is the largest university in Libya and is located in the capital Tripoli. It was founded in 1957 as a branch of University of Libya before it was divided in 1973 to become what is now known as University of Tripoli. Wikipedia.

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Keshlaf M.,University of Tripoli
Journal of Apicultural Research | Year: 2017

Honey bees (Apis mellifera L.) are native in Africa, and traditional beekeeping has been practiced by Africans in all parts of the continent for many thousands of years. No doubt, the introduction of removable comb hives to many countries including Libya has significantly contributed to develop beekeeping industry. However, there is little scientific information published worldwide about beekeeping history, especially in Africa. This review article aims to shed light on the current state of keeping honey bees in Libya, bee plants and honey production, and pest and diseases recorded. © 2017 International Bee Research Association.

Nasrallah N.F.,University of Tripoli
Physical Review D | Year: 2017

The couplings of the isosinglet axial-vector currents to the η and η′ mesons are evaluated in a stable, model-independent way by use of polynomial kernels in dispersion integrals. The corrections to the Gell-Mann-Oakes-Renner relation in the isoscalar channel are deduced. The derivative of the topological susceptibility at the origin is calculated taking into account instantons and instanton screening. © 2017 American Physical Society.

Daw N.A.,University of Tripoli
2016 17th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering, STA 2016 - Proceedings | Year: 2017

This study investigates the speed control of single-phase induction motor capacitor starting using an experimental work and simulation. Single phase induction motors are simple, robust and reliable and are used in enormous numbers especially in domestic and commercial application where 3phase supplies are not available. The laboratory work has been done and the results show performance of the motor. The proposed lab work for the single-phase induction motor capacitor starting is simulated using Matlab/Simulink. The simulation results were compared with the experimental results. © 2016 IEEE.

Eajal A.A.,University of Tripoli | El-Hawary M.E.,Dalhousie University
IEEE Transactions on Power Delivery | Year: 2010

Shunt capacitors installation in distribution systems requires optimal placement and sizing. More harmonics are being injected into distribution systems. Adding shunt capacitors may lead to high distortion levels. The capacitor placement and sizing problem is a nonlinear integer optimization problem, with locations and ratings of shunt capacitors being discrete values. The goal is to minimize the overall cost of the total real power loss and that of shunt capacitors while satisfying operating and power quality constraints. This paper proposes to solve the problem using particle swarm optimization (PSO). A discrete version of PSO is combined with a radial distribution power flow algorithm (RDPF) to form a hybrid PSO algorithm (HPSO). The former is employed as a global optimizer to find the global optimal solution, while the latter is used to calculate the objective function and to verify bus voltage limits. To include the presence of harmonics, the developed HPSO was integrated with a harmonic power flow algorithm (HPF). The proposed (HPSO-HPF)-based approach is tested on an IEEE 13-bus radial distribution system (13-Bus-RDS). The findings clearly demonstrate the necessity of including harmonics in optimal capacitor placement and sizing to avoid any possible problems associated with harmonics. © 2010 IEEE.

Nasrallah N.F.,University of Tripoli
Physical Review C - Nuclear Physics | Year: 2013

QCD sum rules using polynomial kernels are used to evaluate the strong part of the proton-neutron mass difference δMnp in a model independent fashion. The result for the mass difference turns out to depend sensitively on the value of the four-quark condensate (q̄q) 2 and reproduces the experimental value of δMnp for (q̄q)2 q̄q2. © 2013 American Physical Society.

O'Connor A.J.,Trinity College Dublin | Kenshel O.,University of Tripoli
Journal of Bridge Engineering | Year: 2013

This paper provides experimentally determined estimates of the scale of fluctuation of the principal variables employed in modeling chloride-induced corrosion for reinforced concrete; i.e., the surface chloride content (Cs) and apparent diffusion coefficient (Dapp). The estimation of the scale of fluctuation, θ, is based on the analysis of experimental data recorded on a bridge in South East Ireland prior to its extensive rehabilitation in 2007. In determining the scale of fluctuation the paper considers two commonly used methods; i.e., the maximum likelihood method and the autocorrelation curve-fitting method. The reliability of both methods is discussed. Introduction of the kriging statistical interpolation method is demonstrated to improve the reliability of the estimates of the scale of fluctuation. The results obtained from the analysis are compared with values in the literature proffered by other researchers. © 2013 American Society of Civil Engineers.

Taher Y.A.,University of Tripoli
Libyan Journal of Medicine | Year: 2012

Background: Mentha piperita L. (Labiatae) is an herbaceous plant, used in folk medicine for the treatment of several medical disorders. Methods and Results: In the present study, the aqueous extract of Mentha piperita leaf, at the i.p doses 200 and 400 mg/kg, showed significant analgesic effects against both acetic acid-induced writhing and hot plateinduced thermal stimulation in mice, with protection values of 51.79% and 20.21% respectively. On the contrary, the Mentha piperita leaf aqueous extract did not exhibit anti-inflammatory activity against carrageenan induced paw oedema. Conclusion: These findings indicate that Mentha piperita has a potential analgesic effect that may possibly have mediated centrally and peripherally, as well as providing a pharmacological evidence for its traditional use as a pain reliever. © 2012 Yousef A. Taher.

The present study sought to examine the effect of nonhuman's external regulation on children's self-regulation to regulate their own process of learning and to what extent did children succeed in terms of application when they talk and think while act alone with nonhuman's external regulator. The Aginian's methodology (Agina, Kommers, & Steehouder, 2011a, 2011b, 2011c, 2011d, 2011e) that used an isolated, computer-based learning system and acts as a standalone learning environment with special set of tasks was used by hundred healthy preschool children. The results showed that young children were able to regulate their own process of learning and engage with their full free-will without the need of their real teacher's regulation. The conclusion provided evidence that the verbalization of thinking aloud should occur spontaneously by nature, the nonhuman's external regulation has a positive effect on young children's development when they act with their full free-will, and has a positive effect on their behavior either. © 2012 Elsevier Ltd. All rights reserved.

The present study was conducted to explore the effect of nonhuman's external regulation on children's natural development process of creative thinking, the degree of the manifested creative thinking, the influence of children's verbalization on their creative thinking, and the extent the stimulus material was usable for children during learning math tasks. The Aginian's methodology (Agina, Kommers, & Steehouder, 2011a, 2011b, 2011c, 2011d, 2011e) that relied on an isolated, computer-based learning system that acts as a standalone learning environment, with special child-simple-calculator was used by 100 healthy preschool children. The results showed that children were fluctuated between negative and positive creative thinkers, children's verbalization has no effect on their creative thinking, and the relation between the children's verbalization of thinking aloud and their creative thinking is a reverse relationship. The usability analysis concluded that, fun is not a key element of the usability as it can only be a feature that could facilitate usability. The mathematical analysis showed that the computer, as a nonhuman external regulator, can integrate the net signed of children's creative thinking through embedding mathematics integration. © 2012 Elsevier Ltd. All rights reserved.

Ahmed M.O.,University of Tripoli
Euro surveillance : bulletin européen sur les maladies transmissibles = European communicable disease bulletin | Year: 2010

Brucellosis is a global zoonotic disease, endemic in North African countries and around the Mediterranean.A prospective study of Brucella seroprevalence was conducted in north-western Libya (western mountains region). Blood samples collected over 13 months in the period December 2006 to January 2008 from 561 animals (goats, sheep, cattle and camels) and 546 human volunteers were tested for Brucella using the Rose Bengal test, tube agglutination test and ELISA assays. Amongst livestock, 31% of goats and 42% of cattle were seropositive. Human samples showed a high seropositivity of 40%, with 95 (43%) of the 221 positive samples positive for IgM, indicating active or recent infection. Control measures are needed to reduce this high prevalence of brucellosis in Libya.

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