DSpace 9 ENSET SKIKDA

Dépôt numérique de l'École Normale Supérieure de l’Enseignement Technologique – Skikda –

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Design and Development of an Intelligent Radar System Using Arduino and an Android Interface
(Higher Normal School of Technological EducationSkikda, 2026) Bedadi, Maroua; Haffallah, Assala; Tifouti, Issam
This thesis addresses the design and implementation of an intelligent radar system for remote monitoring and sensing, aimed at translating theoretical concepts into a tangible practical model. The system is based on an Arduino Uno board as the main control unit, connected to an ultrasonic sensor for distance measurement and a servo motor for angular scanning, as well as a buzzer that sounds automatically upon detection of any target within the security range. To display and track the data, two integrated monitoring channels have been implemented; the first is wired via a computer using an interactive graphical interface with the Processing software that simulates real radar screens, and the second is wireless via a mobile phone using the Zealotbt app, through the integration of an HC-05 Bluetooth module to ensure data transmission and remote control. Field results have demonstrated the system’s efficiency and high accuracy in detecting targets and triggering alarms in real time.
دراسة الزيوت الأساسية لنبات الغار
(Ecole normale supérieure d’Enseignement technologique, 2026) مراحي آية; شيدوح امينة
تناولت هذه الد ا رسة تثمين نبات الغار Laurus nobilis من خلال استخلاص زيته الأساسي ود ا رسة بعض خصائصه الكيميائية والبيولوجية. تم الحصول على الزيت الأساسي بتقنية التقطير المائي بمردودية بلغت % 1.25 ، كما تم الكشف عن وجود المركب الفعال 1,8 -سينول باستعمال تقنية كروماتوغ ا رفيا الطبقة الرقيقة .(CCM) وتم تقييم النشاط المضاد للبكتيريا للزيت الأساسي ضد سلالات Escherichia coli و Pseudomonas aeruginosa ، حيث أظهرت النتائج حساسية ضعيفة لدى معظم السلالات، بينما سجلت بكتيريا Pseudomonas aeruginosa مقاومة تامة، مما يدل على محدودية الفعالية المضادة للبكتيريا للزيت الأساسي في الظر وف التجريبية المعتمدة .
Ab-initio Study of the Structural, Electronic, Optical, Thermal properties and Structural Stability of III-V ternary Semiconductors and double perovskites by the FP-LAPW
(Higher Normal School of Technological Education of Skikda, 2026) Louati, Nesrine; Oumelaz, fayçal
Through our work, we investigate the properties of YN1-xSbxternary alloys in which (Y: B, Al and Ga) while x represent the Sb concentration (x=0, 0.25, 0.5, 0.75 and 1) in addition to Sr2NaXO6 (X = Cl, Br, and I) double perovskites thought the Wien2k code package based on Density Functional Theory (DFT). This is achieved by full potential linearized augmented plane wave (FP-LAPW) method. A detailed and systematic analysis of the structural, electronic, optical, elastic and thermal properties in addition to thermoelectric properties for double oxide perovskite has been carried. Structural optimization, transition phase, thermal and elastic constant calculations were performed using the WC-GGA potential for YN1-xSbx alloys and PBEsol exchange–correlation functional forSr2NaXO6 (X = Cl, Br, and I) double perovskites. While the KTB-mBJ potential was employed to accurately, describe the electronic, thermoelectric, and optical properties. In addition, the WC-GGA and TB-mBJ scheme was used to further validate and refine the electronic band structure analysis. The elastic constants were calculated to verify the mechanical stability and determine the mechanical properties.The effect of temperature on the lattice constant, bulk modulus, heat capacity, and Debye temperature was also investigated. Our work demonstrates a high consistency between our calculated results and both available experimental data and previous theoretical studies. Therefore, we expect this research to represent a significant scientific contribution providing a valuable reference for future studies, as well as inspiring and facilitating subsequent experimental investigations
Etude chimique et activités biologiques des extraits bioactifs de l’inule visqueuse "Dittrichia viscosa" du Nord-Est Algérien
(École Normale Supérieure de l’Enseignement Technologique de Skikda, 2026) Mezi, Ilhem; Heni, Sonia
Cette étude vise à valoriser Dittrichia viscosa, une plante médicinale largement répandue dans le Nord-Est Algérien et couramment utilisée en médecine traditionnelle pour le traitement de diverses affections, en explorant de manière intégrée ses propriétés chimiques et biologiques. Pour cela, trois types de composés bioactifs ont été étudiés : l’huile essentielle, l’extrait méthanolique et l’extrait hydro-éthanolique, en combinant investigations phytochimiques, caractérisation chimique par GC-MS/MS et LC-MS/MS, essais biologiques in vitro ainsi que des approches in silico. Les activités antioxydante, anti-inflammatoire, antimicrobienne, antidiabétique, antifongique et cytotoxique ont été évaluées in vitro. Par ailleurs, des études d’amarrage moléculaire, complétées par des simulations de dynamique moléculaire ainsi que par des prédictions pharmacocinétiques et toxicologiques appliquées aux extraits, ont permis de conforter les données expérimentales et de mieux caractériser le potentiel pharmacologique de cette espèce. L’analyse chimique par GC-MS/MS de l’huile essentielle extraite a révélé la prédominance du cis-lancéol et du nérolidol, deux composés présentant un intérêt pharmacologique notable. Sur le plan antimicrobien, l’huile essentielle s’est montrée particulièrement efficace contre Staphylococcus aureus, Escherichia coli, Candida albicans et Bacillus cereus, tandis que Pseudomonas aeruginosa s’est révélée la souche la plus résistante. L’activité antiproliférative observée sur les cellules cancéreuses MCF-7 et les cellules normales L929 suggère toutefois un effet antiprolifératif modéré et non sélectif. Le profil de l’extrait méthanolique par LC-MS/MS a révélé une richesse notable en riboflavine et en acide chlorogénique, suggérant que Dittrichia viscosa pourrait représenter une source naturelle prometteuse de vitamine B2. Cet extrait a montré des activités biologiques significatives, incluant des effets antioxydants, anti-inflammatoires, antimicrobiens, antidiabétiques ainsi qu’une activité cytotoxique particulièrement notable sur la lignée cellulaire MCF-7. En revanche, son efficacité s’est révélée plus réduite à l’égard des champignons phytopathogènes. Par ailleurs, les investigations in silico réalisées dans le cadre des activités antioxydante, anti-inflammatoire, cytotoxique et antimicrobienne ont confirmé la stabilité des interactions entre plusieurs composés bioactifs et leurs cibles protéiques. Les analyses ADMET ont, quant à elles, mis en évidence des profils pharmacocinétiques globalement favorables, associés à une faible toxicité, renforçant ainsi l’intérêt pharmacologique de cet extrait. Par ailleurs, la caractérisation chimique de l’extrait hydro-éthanolique par LC-MS/MS a permis d’identifier onze composés bioactifs majeurs. Cet extrait a montré un effet notable sur la vvi majorité des activités biologiques étudiées dans les conditions in vitro. Les approches in silico ont particulièrement mis en évidence le rôle potentiel de la naringénine et de la rutine, qui présentent des interactions stables avec les protéines cibles COX-2 et Keap1, confirmées par des simulations de dynamique moléculaire et des calculs MM-PBSA
Structural Stability, Elecctronic, Opticol, and Thermal Properties of III-V Ternary Semiconductors: AxB1_xC
(Higher Normal School of Technological Education of Skikda, 2026) Chebouki, Sonia; Nemiri, Ouarda
First-principles simulations were carried out to explore the structural stability, electronic, optical, mechanical and thermal properties of InxAl1−xY semiconductor alloys (Y = N, P, As, Sb and Bi) using Density Functional Theory (DFT) based on the FP-LAPW method integrated in WIEN2k code. For exchange – correlation energy, the Wu–Cohen generalized gradient approximation (WC - GGA) was considered to examine structural and mechanical properties. In addition, modified Becke – Johnson potential proposed by Koller et al (nKTB - mBJ) along with the Engel – Vosko GGA, were utilized to refine the potential for accurate band structure analysis. Structural results confirm that all alloys stable in the zinc blende phase, except Y = N which favors the wurtzite structure, while lattice constants and bulk moduli follow Vegard’s law. Electronic analysis reveals indirect-to-direct band gap transitions with indium incorporation, improving optical performance and extending spectral coverage from the ultraviolet to the near - infrared region. Optical results indicate strong absorption in UV – visible for nitrides and phosphides, while heavier alloys shift absorption toward the infrared region. Mechanical calculations demonstrate elastic stability with brittle behavior. Thermal analyses show high Debye temperatures and thermal conductivities for compounds (N, P), while Sb - and Bi - based alloys exhibit lower conductivity, larger thermal expansion, and higher vibrational entropy, which make them favorable for thermoelectric applications. Overall, InxAl1−xY alloys combine strong structural stability, tunable band gaps, diverse optical responses, and promising thermal features, making them suitable for applications in LEDs, photodetectors, solar cells, and thermoelectric generators