ANTIBACTERIAL ACTIVITY AND GAS CHROMATOGRAPHY–MASS SPECTROMETRY STUDIES OF ALGERIAN ATRIPLEX HALIMUS L.

Objective: The objective of the study was to find out the antibacterial efficacy and identify the main constituents of the essential oil of Atriplex halimus from southwest of Algeria. Methods: The essential oil from the aerial parts of the endemic plant A. halimus (saltbush in English, qataf in Arabic) collected from the region of Sahara southwest of Algeria was isolated by hydrodistillation and analyzed by gas chromatography–mass spectrometry. Antibacterial potency of essential oil from this plant has been tested against Staphylococcus aureus (ATCC 29213), Escherichia coli (ATCC 25922), and Bacillus cereus (ATCC11778) by disk diffusion assay. Results: The essential oil revealed the presence of 14 components, the dominant compounds arecadina-1(10), 4-diene (10.69%), germacrene D (9.79%), octane (9.37%), pelargonaldehyde (9.06%), 3-Furancarboxaldehyde (6.87%), β-pinene (2.6%), camphene (2.59%), and myrcene (2.10%). The essential oil exhibits very effective antimicrobial activity using disk diffusion assay method with minimum inhibitory concentration ranging from 0.82 μl/ml to 2.4525 μl/ml. Conclusions: This result showed that this native plant may be a good candidate for further biological and pharmacological investigations

CHEMICAL CHARACTERIZATION BY GC-MS FROM THE AERIAL PARTS OF FAGONIA LONGISPINA (ZYGOPHYLLACEAE)

Objective: The objective was to characterize the phytochemical constituents in ethyl acetate (EtOAc) extract from the aerial parts of Fagonia longispina(zygophyllaceae) by gas chromatography-mass spectrometry (GC-MS).Methods: The dried powder of the aerial parts of F. lonjispina was extracted exhaustively with ethanol. The extract was concentrated, diluted withwater and partitioned with EtOAc. The residue of the EtOAc extract was performed using a GC-MS.Results: Chemical constituents of the EtOAcextract of F. Longispina Family (Zygophylaceae) were identified by GC-MS and their relative concentrationswere determined. F. Longispina extract contained 12 compounds: Cis-4-(4 -T-butylcyclohexyl)-4-methyl-2-pentanone (33.33%), 4beta-(tert-butyl)1alpha-(1methylvinyl)cyclohexanemethanol (09.52%), cyclohexyl-2-methylenebutanylketone(14.28%),trans-4-(–t-butylcyclohexyl)-4-methyl2-pentanone(9.52%),2,6,10-trimetyl,14-Ethylne-14pentadecene (6.66%), 2-decen-1-ol(cas) (4.76%), 3,7,11,15-tetramethyl-2-hexadecen-1-ol(2.85%),2-nonen-1-ol (4.76%), citronellylacetate(2.85%), tetratetracontane(3.38%), hexatriacontane(cas) (3.38%), and phytolacetate(4.76%).'Conclusions: This GC-MS study helps to predict the formula and structure of phytoconstituents which can be used as drugs, and further investigationmay leads to the development of drug formulation. These compounds are probably the major players in the antioxidant responses evoked by the plant.Keywords: Etyl acetate extract, Gas chromatography-mass spectrometry analysis, Fagonia longispina

Is there an effect of electromagnetic waves from base stations on the breeding success of Ciconia ciconia ciconia in Algeria?

New nest supports used by the white stork Ciconia ciconia ciconia (Linnaeus, 1775) are mobile phone network relay antennas, which are not without danger because they emit electromagnetic waves that can have a major, although insidious, impact on the species. The aim of this study is to assess the effects of electromagnetic waves from mobile phone network base stations on white stork reproduction. We monitored the breeding phenology of the storks as a function of the distance of their nests from the base stations over 2 consecutive seasons, 2020 and 2021. The work took place in the North-East of Algeria, in Annaba and El-Tarf provinces. The nests were counted and divided into 3 distinct groups. The first is located on the relay antennae, the second less than 200 m and the third more than 300 m from the antennae. We calculated nest occupancy, number of young in the nest and number of nests without young. The results show that nests located directly on base stations have a reduced clutch size, not exceeding two storks and a low reproductive success since the majority of nests (51.9%) remained without young. The number of young storks tends to increase in nests far from base stations. Broods with 3 and 4 young are generally those located more than 300 m from relay antennas

Dive into heritage: a digital documentation platform of world heritage properties in the Arab states region

The world celebrated the 50 years of the World Heritage Convention. With more than 1000 cultural and natural sites, the 1972 World Heritage Convention is the most widely recognized. It has provided a framework for identifying, documenting, protecting, and managing the world's cultural and natural heritage with Outstanding Universal Value (OUV). The theme to mark this anniversary is: “The Next 50: World Heritage as a Source of Resilience, Humanity and Innovation”. These are the topics that have inspired the World Heritage Centre to develop, together with the Member States in the Arab Region, an online platform that leverages digital technologies to safeguard and promote the UNESCO World Heritage sites and its related intangible heritage, and transmit them to future generations. This paper discusses the current state of digital documentation of cultural heritage and the related projects/initiatives in the Arab States region. It presents the UNESCO Dive into Heritage initiative and its first outcomes. It concludes with lessons learned and future steps for the next phases of the project. First outcomes have revealed the big challenge of 3D data integration and the need to accompany the implementation stages of the project with capacity building

Dive into heritage: a digital documentation platform of World Heritage properties in the Arab states region

The world celebrated the 50 years of the World Heritage Convention. With more than 1000 cultural and natural sites, the 1972 World Heritage Convention is the most widely recognized. It has provided a framework for identifying, documenting, protecting, and managing the world's cultural and natural heritage with Outstanding Universal Value (OUV). The theme to mark this anniversary is: "The Next 50: World Heritage as a Source of Resilience, Humanity and Innovation". These are the topics that have inspired the World Heritage Centre to develop, together with the Member States in the Arab Region, an online platform that leverages digital technologies to safeguard and promote the UNESCO World Heritage sites and its related intangible heritage, and transmit them to future generations. This paper discusses the current state of digital documentation of cultural heritage and the related projects/initiatives in the Arab States region. It presents the UNESCO Dive into Heritage initiative and its first outcomes. It concludes with lessons learned and future steps for the next phases of the project. First outcomes have revealed the big challenge of 3D data integration and the need to accompany the implementation stages of the project with capacity building

LE COEFFICIENT D’OCCUPATION DU SOL COS ET LA PROMOTION DES TECHNIQUES MODERNES DE LA GESTION URBAINE -CAS DE LA VILLE D’ALGER

Les systèmes traditionnels de contrôle de la densité, lors de l’établissement du Plan Directeur d’Aménagement et d’Urbanisme(PDAU) et le Plan d’Occupation du Sols (POS) dont la responsabilité communale s’exerce, imposent des innovations rapideset fondamentales des techniques modernes de gestion urbaine.Partie intégrante du POS, le coefficient d’occupation du sol (COS) représente une règle axiale pour les nouveaux outilsd’urbanisme, il est donc l’élément de base du règlement d’urbanisme.L’objet de ce travail est la mise au point d’une méthode théorique et analytique du COS, qui met en évidence ses facteursdéterminants et sa relation avec les espaces fonctionnels de l’habitat. Ce travail s’intéresse surtout à l’équilibre entre laréglementation concernant le coefficient d’occupation du sol et son application. C’est une phase importante pour la poursuitedes empreintes et des effets du COS dans la réalité,Le travail se termine par un modèle d’intégration informatisée qui met en reliefs ces relations et leurs interactions.Mots clés : Algérie – Alger–Densité–Coefficient d’occupation des sols COS-Droit de l’urbanisme-Techniques de gestionurbaine-Programme COS

INFLUENCE DE L’ACTIVITE COMMERCIALE SUR L’URBANISATION : CAS DE LA COMMUNE DE BIRKHADEM, ALGER

L’étude du commerce fait partie de l’étude des activités tertiaires, qui sont à la fois cause et conséquence de l’extension urbaine, puisque elles assurent l’animation et le dynamisme de la vie urbaine. La chute de l’union des républiques soviétiques (URSS), et la vague de libéralisations du commerce dans la quasi-totalité des pays du monde, à partir du début des années quatre-vingt-dix du siècle dernier, n’a pas épargné l’Algérie qui, elle aussi est passée d’une économie planifiée caractérisée par le monopole de l’état à celle du type libéral. Ainsi, le commerce à l’importation, détenu par quelques dizaines de société nationale, est cédé au privé qui a investi le marché par des milliers d’importateurs. L’exemple de la SONACOME, société d’état qui détenait le monopole sur l’importation de la pièce détachée et des véhicule à cédé la place à plus de 2283 importateurs privés1. Ce bouleversement économique a concerné aussi le commerce de gros et de détail qui, après la disparition des sociétés d’état, détiennent actuellement la majorité de la population occupée. Ces occupées permanents et occasionnels travaillent dans des activités commerciales légales et enregistrés au niveau du centre national du registre de commerce (CNRC), mais, le plus grand nombre active dans le commerce de manière informelle. Dans les pages qui suivent nous essayons de voir l’ampleur du commerce à Birkhadem, une commune d’Alger, et son impact sur le mode d’urbanisation

Parallel Evaluation of Multi-join Queries

A number of execution strategies for parallel evaluation of multi-join queries have been proposed in the literature. In this paper we give a comparative performance evaluation of four execution strategies by implementing all of them on the same parallel database system, PRISMA/DB. Experiments have been done up to 80 processors. These strategies, coming from the literature, are named: Sequential Parallel, Synchronous Execution, Segmented Right-Deep, and Full Parallel. Based on the experiments clear guidelines are given when to use which strategy. This is an extended abstract; the full paper appeared in Proc. ACM SIGMOD'94, Minneapolis, Minnesota, May 24–27, 199

From component reduced models to reduced modelling of multi-component systems

The present work focuses on the reduced modelling of multi-component systems, in particular on a two stages stamping chain process. Starting from snapshots collected by using the commercial software PAM-STAMP, the non-intrusive sparse-PGD constructor is used in order to build a parametric transfer function of each operation in a separated representation, circumventing the problem of the curse of dimensionality. Moreover, in order to fill the gap between this deterministic solution and the measured fields and safely applied control strategies, data driven-modeling can be employed according to the new “hybrid twin” methodology

DIVE INTO HERITAGE: A DIGITAL DOCUMENTATION PLATFORM OF WORLD HERITAGE PROPERTIES IN THE ARAB STATES REGION

The world celebrated the 50 years of the World Heritage Convention. With more than 1000 cultural and natural sites, the 1972 World Heritage Convention is the most widely recognized. It has provided a framework for identifying, documenting, protecting, and managing the world's cultural and natural heritage with Outstanding Universal Value (OUV). The theme to mark this anniversary is: “The Next 50: World Heritage as a Source of Resilience, Humanity and Innovation”. These are the topics that have inspired the World Heritage Centre to develop, together with the Member States in the Arab Region, an online platform that leverages digital technologies to safeguard and promote the UNESCO World Heritage sites and its related intangible heritage, and transmit them to future generations. This paper discusses the current state of digital documentation of cultural heritage and the related projects/initiatives in the Arab States region. It presents the UNESCO Dive into Heritage initiative and its first outcomes. It concludes with lessons learned and future steps for the next phases of the project. First outcomes have revealed the big challenge of 3D data integration and the need to accompany the implementation stages of the project with capacity building