كلية العلوم

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كلية العلوم هي احدى الكليات التابعة لجامعة الزيتونة. 

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أ. محمد سالم عبدالله النايض
كلية العلوم - جامعة الزيتونة
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د. رفيق المبروك محمد الحسناوي
كلية العلوم - جامعة الزيتونة
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د. مفتاح محمد علي رمضان
كلية العلوم - جامعة الزيتونة

منشورات مختارة

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Improved Route Cache Method for Dynamic Source Routing Protocol

Mobile Ad-hoc Networks (MANETs) are described by connectivity through a collection of wireless mobile nodes along with rapid changing network topology. Wireless mobile nodes are free to move autonomous of each other which make routing processes more complicated. In order to assist communication in the network, a routing approach is required to discover and maintain routes between wireless mobile nodes. This article suggests a new approach for MANET routing protocols, specifically for Dynamic Source Routing (DSR) protocol. We named it IRC. Basically, IRC utilizes an Improved Route Cache method for efficient route caching. It aids mobile nodes to reorder their route caches as soon as a new route has discovered. Since IRC employed two different concepts; freshness and shortness of the source route to select an efficient source route for possible future use. As results, excessive experiments show that the improved DSR (which uses IRC method) outperformance the standard DSR protocol in several simulation scenarios, specifically: the packet delivery ratio, routing overhead, and dropped packet ratio with respect to the mobility. All the simulation scenarios have been carried out with GloMoSim simulator.
رجب عمر محمد صالح, (5-2019)

Estimating Gait Patterns of One Leg by Using Central Pattern Generators

It is perhaps noteworthy in the locomotion literature of recent years that different forms of locomotion can be found by genetic algorithms using patterns formed by uncoupled, unidirectional and bidirectional two Central Pattern Generators (CPGs). This paper outlines the kinematic model of one leg with two degrees of freedom (DOF), analyzes stability and bifurcation, and pinpoints CPGs and their implementations. Specifically, this paper presents an evolutionary method of gait generation for the one leg structure. It attempts to utilize genetic algorithms with hybrid function and adapt the CPGs to robotic systems that perform one-leg movement, with the objective of figuring out optimal walking gaits.
, , , (12-2017)

DETERMINATION OF TYPICAL HEAVY METALS IN HAIR DYES BRANDS SELECTED FROM LIBYAN MARKETS

ABSTRACT Heavy metals exist in our environment, making it difficult to avoid their presence and impact on the human body. Heavy metal toxicity in humans is caused by long-term or high-level exposure to pollutants found in the environment, including the air, water, food, and many consumer products such as cosmetics, one of which is hair dyes. We measured the levels of toxic metals in different hair dye products sold at local shops in Tripoli, Libya, for this study. Five hair dyes were selected as popular brands in Libyan markets. Wet digestion was used to prepare the samples. And the analysis of heavy metals was done by the ICP-MS. Heavy metals such as Cd, Pb, Cu, Cr, Ba, As, and Zn were detected in all of the hair dye samples tested. The concentrations of heavy metals in the analyzed hair dyes varied. Also, low concentrations of toxic heavy metals Pb and Cd were detected in all samples. However, these heavy metals are strictly prohibited from being used as a material (EU Directive No. 1223/2009) in the production of cosmetic products, including hair dyes. The majority of the concentrations were above acceptable cosmetic levels. Heavy metals have been shown to cause toxicity in the human body, even at low levels, highlighting the need to strengthen control over cosmetic products by the competent authorities in Libya.
, (3-2022)
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د. عبدالفتاح البشير جمعة البركي

عبدالفتاح البركي هو احد اعضاء هيئة التدريس بقسم الرياضيات بكلية كلية العلوم. يعمل السيد عبدالفتاح البركي بجامعة الزيتونة كـمحاضر منذ 2018-10-27 وله العديد من المنشورات العلمية في مجال تخصصه