DSpace Communauté:
https://dspace.univ-ouargla.dz/jspui/handle/123456789/241
2024-03-28T22:12:28ZSecure Transmission in Telemedicine
https://dspace.univ-ouargla.dz/jspui/handle/123456789/35855
Titre: Secure Transmission in Telemedicine
Auteur(s): Sayeh, Mouad; KAIROUANI, ISRA; AZZOUZI, FATIMA EZAHRA
Résumé: The growing number of medical digital images necessitates their secure sharing
among specialists and hospitals while protecting patient privacy. To achieve this, medical
image watermarking is essential. However, the watermarking process must be carefully
executed for two key reasons. Firstly, it should not compromise image quality. Secondly,
confidential patient information embedded in the image should be reliably retrievable even
after decompression. Despite extensive research in this area, no existing method fulfills all
requirements of medical image watermarking. This study aims to address this gap by
providing a comprehensive survey of different methods, including DWT with SVD and
spread spectrum, analyzing their strengths and weaknesses, and offering valuable insights
to researchers.2023-01-01T00:00:00ZStudy and control of the Z-source inverter
https://dspace.univ-ouargla.dz/jspui/handle/123456789/35854
Titre: Study and control of the Z-source inverter
Auteur(s): CHAIB, Ibtissam; BABANNA, Sahl; IDRICI, Hossam-Eddine
Résumé: This dissertation presents a study about the z-source inverter. It contains the study of the
different control strategies used for the control of the z-source inverter. The control
strategies studied in this work are as follow: Simple boost control SBC, Maximum boost
control MBC and Maximum constant boost MCBC. A simulation using MATLAB/Simulink
is carried out to verify the control strategies, and to compare between them in terms of
current ripple, output voltage, current and their harmonic curves. In addition to the shoot-
through state on the Z-source network to achieve optimal efficiency.2023-01-01T00:00:00ZDesign And Monitoring Of A Dual Axis Solar Tracking System
https://dspace.univ-ouargla.dz/jspui/handle/123456789/35853
Titre: Design And Monitoring Of A Dual Axis Solar Tracking System
Auteur(s): Achbi, Mohammed Said; Medjouri, leila salsabile; Ibek, ag sahli tayeb
Résumé: The energy crisis and pollution are two of the biggest problems facing our planet. To save our
environment and fulfill the global demand for power, we must use cleaner sources to generate
energy. This project consists of designing a GSM-based data acquisition program for a dual-axis
solar tracking system that uses sunlight to produce power that is both clean and sustainable. The
materials used include a solar photovoltaic panel, an esp 32 microcontroller, an LDR sensor,
current and voltage sensors, an AM 2301 sensor, a convertor, and a servo motor. All data coming
from the sensors will be sent and collected on a specially designed web page, which will be used
in system supervision to monitor the data collection and analysis process and display data in real
time and controlling the system remotely. A SCADA system using OPC technology and TIA
PORTAL program will be used to monitor the system and check its performance anywhere and
at any time.2023-01-01T00:00:00ZReconnaissance des personnes par 3D palmprint en utilisant LPQ
https://dspace.univ-ouargla.dz/jspui/handle/123456789/35718
Titre: Reconnaissance des personnes par 3D palmprint en utilisant LPQ
Auteur(s): CHAA, Mourad; DEKHIL, Mohamed Lamine; BENZAOUI, Ilyas
Résumé: L'utilisation croissante de la 3D palmprint en tant que solution biométrique pour
l'identification et la vérification de l'identité des individus renforce la sécurité. Nous
travaillons actuellement sur l'amélioration du système d'identification basé sur la 3D
palmprint. Notre proposition repose sur l'utilisation du filtre TT(tan et triggs) pour le
prétraitement des données, ainsi que sur les techniques d'extraction de caractéristiques telles
que LPQ, BSIF et HOG. Enfin, la classification des vecteurs est effectuée à l'aide de
l'algorithme KNN en utilisant différentes distances (euclidienne, cosinus, ctb, mahcos). Les
résultats obtenus démontrent des performances très encourageantes, avec un taux de
reconnaissance atteignant 99,95%.2023-01-01T00:00:00Z