Results 11 to 20 of about 8,897 (194)

Spider (Araneae: Araneomorphae) diversity in Annaba Province, Northeastern Algeria

Acta Zoológica Lilloana
Spiders, as predatory arthropods, play essential roles in ecosystem equilibrium and serve as bioindicators. To contribute to the understanding of spider diversity in northeast Algeria (Annaba province), a survey of spider fauna was conducted in both ...
Racha Benhacene, Yasmine Adjami, Kamelia Hesni Benotmane, Rached Hadiby, Mohamed Laid Ouakid   +4 more
doaj   +2 more sources

Assessment of air quality index in Annaba

Technology audit and production reserves, 2023
In recent years, the world has been witnessing serious ecological imbalances due to the catastrophic situation and the damage caused to the environment. Human activities as waste disposal, cement units, smelting, chemical industries etc., are the main causes of pollution.
Salem Badjoudj, Aissa Benselhoub, Souad Narsis, Nadiia Dovbash, Abdelaziz Idres, Khadouja Marame Benghadab, Fares Boutarfa, Mohamed Bounouala, Stefano Bellucci   +8 more
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Annaba [PDF]

Encyclopédie berbère, 1988
Hippone, Bone, Bouna, Annaba, la filiation toponymique apparait evidente, meme si pour certains le nom d’Annaba aurait pour origine le terme arabe signifiant « jujubier ». La filiation urbaine sur ce site, a travers deux millenaires, n’est pas moins evidente. Le site (M. Cote) Deux elements conjoints sont a l’origine de la fortune de cette ville.
Cote, M., Camps, G.
openaire   +1 more source

A spatio-temporalretrospective of theurban sprawlof Annaba (Algeria)

Journal of Fundamental and Applied Sciences, 2023
Urban sprawl is a phenomenon with a negative effect which, over time, consumes the living environment . The aim of this research is to analyze and evaluate the urban sprawl of Annaba situated at the northeastern part of Algeria in a diachronic approach. The studied area contains twelve agglomerations.
Saouli, R. A., Benhassineenhassine, NN., Oularbiularbi, AA.   +2 more
openaire   +2 more sources

Stability in nonlinear neutral differential equations with variable delays using fixed point theory

Electronic Journal of Qualitative Theory of Differential Equations, 2011
The purpose of this paper is to use a fixed point approach to obtain asymptotic stability results of a nonlinear neutral differential equation with variable delays. An asymptotic stability theorem with a necessary and sufficient condition is proved.
Abdelouaheb Ardjouni, Ahcene Djoudi
doaj   +1 more source

Fixed points and stability in nonlinear neutral Volterra integro-differential equations with variable delays

Electronic Journal of Qualitative Theory of Differential Equations, 2013
In this paper we use the contraction mapping theorem to obtain asymptotic stability results of the zero solution of a nonlinear neutral Volterra integro-differential equation with variable delays.
Abdelouaheb Ardjouni, Ahcene Djoudi
doaj   +1 more source

The existence of periodic solutions for a second order nonlinear neutral differential equation with functional delay

Electronic Journal of Qualitative Theory of Differential Equations, 2012
In this article we study the existence of periodic solutions of the second order nonlinear neutral differential equation with functional delay \[ \frac{d^{2}}{dt^{2}}x\left( t\right) +p\left( t\right) \frac{d}{dt}x\left( t\right) +q\left( t\right)
Abdelouaheb Ardjouni, Ahcene Djoudi
doaj   +1 more source

Some results on quadratic credibility premium using the balanced loss function [PDF]

Arab Journal of Mathematical Sciences, 2023
Purpose – This paper generalizes the quadratic framework introduced by Le Courtois (2016) and Sumpf (2018), to obtain new credibility premiums in the balanced case, i.e. under the balanced squared error loss function.
Farouk Metiri, Halim Zeghdoudi, Ahmed Saadoun   +2 more
doaj   +1 more source

Placenta accreta: Risk Factors, Antenatal Diagnosis, and Management of 50 Cases at Annaba University Hospital, Algeria [PDF]

Batna Journal of Medical Sciences
Background: Placenta accreta spectrum (PAS) is a serious obstetric disorder characterized by abnormal placental adherence to the uterine wall and associated with high maternal morbidity.
Ouafa GUELLATI, Imed DIABI, Amina BELLILI, Ibtissem BRAHMIA, Feriel ADJAILIA   +4 more
doaj   +1 more source

On the limit cycles for a class of eighth-order differential equations

Moroccan Journal of Pure and Applied Analysis, 2020
In this article, we provide sufficient conditions for the existence of periodic solutions of the eighth-order differential equation x(8)-(1+p2+λ2+μ2)x(6)+Ax⃜+Bx¨+p2λ2μ2x=ɛF(t,x,x˙,x¨,x⃛,x⃜,x(5),x(6)x(7)),{x^{\left( 8 \right)}} - \left( {1 + {p^2 ...
Berrehail Chems Eddine, Bouslah Zineb, Makhlouf Amar   +2 more
doaj   +1 more source