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4. Face and Eye Detection Using Skin Color and Viola-Jones Detector

Author

Zaaraoui, Hicham, Kaddouhi, Samir El, Abarkan, Mustapha, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Farhaoui, Yousef, editor, Hussain, Amir, editor, Saba, Tanzila, editor, Taherdoost, Hamed, editor, and Verma, Anshul, editor

Published
2024
Full Text
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10. Electro-optic and electrical properties in Hafnium-doped congruent lithium-niobate crystals

Author

Abarkan, Mustapha, Aillerie, Michel, Salvestrini, Jean-Paul, Fontana, Marc D., and Kokanyan, Edvard

Subjects
Physics - Optics
Abstract

We report the optical and dielectric properties in hafnium (Hf)-doped lithium niobate (LN) crystals. We investigated samples of congruent composition with various doping concentration varying from 0 to 8 mol%. The clamped and unclamped values of the electro-optic coefficient r 22 of Hf-doped LN and the corresponding dielectric permittivity as well, have been experimentally determined and compared with the results obtained in undoped congruent LN crystals. We show that the electro-optic and dielectric properties are only slightly affected by the introduction of hafnium ions, and therefore Hf-doped LN has the advantage of low photorefractive damage compared with the undoped congruent LN.

Published
2008

14. Amazigh Spoken Digit Recognition using a Deep Learning Approach based on MFCC

Author

Boulal, Hossam, Hamidi, Mohamed, Abarkan, Mustapha, Barkani, Jamal, Boulal, Hossam, Hamidi, Mohamed, Abarkan, Mustapha, and Barkani, Jamal

Abstract

The field of speech recognition has made human-machine voice interaction more convenient. Recognizing spoken digits is particularly useful for communication that involves numbers, such as providing a registration code, cellphone number, score, or account number. This article discusses our experience with Amazigh's Automatic Speech Recognition (ASR) using a deep learning- based approach. Our method involves using a convolutional neural network (CNN) with Mel-Frequency Cepstral Coefficients (MFCC) to analyze audio samples and generate spectrograms. We gathered a database of numerals from zero to nine spoken by 42 native Amazigh speakers, consisting of men and women between the ages of 20 and 40, to recognize Amazigh numerals. Our experimental results demonstrate that spoken digits in Amazigh can be recognized with an accuracy of 91.75%, 93% precision, and 92% recall. The preliminary outcomes we have achieved show great satisfaction when compared to the size of the training database. This motivates us to further enhance the system's performance in order to attain a higher rate of recognition. Our findings align with those reported in the existing literature.

Published
2023

15. Frequency and Temperature Effects on Dielectric Properties of PEDOT-VC Copolymer

Author

Ninis Ouafae, Bouachrine Mohammed, and Abarkan Mustapha

Subjects
conjugated copolymer, dielectric spectroscopy, permittivity, conductivity., Environmental sciences, GE1-350
Abstract

The copolymer based on Poly(3, 4-Ethylene dioxythiophen) and Poly(n-Vinylcarbazole) was characterized by FTIR and Raman spectroscopy. The temperature and frequency evolutions of dielectric parameters are also plotted and studied. The dependence of ε” on the temperature shows relaxation process for studied copolymer especially with frequencies about 1kHz for the temperatures: 90°C < T < 118°C. The values of ε’∞, ε’’MAX, relaxation time and DC conductivity corresponding to the copolymer are also determined with the aim to provide dielectric analysis involving vital information about this new polymeric compound.

Published
2021
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21. Frequency dispersion of electro-optical properties over a wide range by means of time-response analysis

Author

Abarkan, Mustapha, Salvestrini, Jean Paul, Aillerie, Michel, and Fontana, Marc D.

Subjects
Crystals, Electrooptics -- Research, Astronomy, Physics
Abstract

We show that a Z-transform-based time-response analysis of the electro-optical response of a crystal to a step voltage with a short rise time allows one to obtain the dispersion of the electro-optical coefficients over a wide frequency range. We describe the method employed and present the results obtained for the main electro-optic coefficients ([r.sub.22], [r.sub.61] and [r.sub.c]) of a standard LiNb[O.sub.3] crystal. We also show that this method is able to provide even small values of the electro-optic coefficients as well as the dispersion within a wide frequency range, which is limited only by the rise time of the step voltage. OCIS codes: 120.0120, 160.2100, 160.3730, 160.4760, 260.2130.

Published
2003

29. The r(22) electro-optic coefficients in indium-doped congruent lithium-niobate crystals

Author

Abarkan, Mustapha Danielyan, Anush Sewastianow, Sasha and Aillerie, Michel Theofanous, Nicephore Kostritskii, Sergey and Kokanyan, Edvard

Abstract

The high-and low-frequency electro-optic coefficients r(222) of In-doped lithium niobate (LN) and the corresponding dielectric permittivity as well, have been experimentally determined and compared with the results obtained in undoped congruent LN crystals. Compared to pure congruent lithium niobate, a low acoustic contribution of the electro-optic and dielectric properties are originally found in indium (In)-doped congruent lithium niobate (LN:In) crystals in the low indium concentration range [0.12-1.7 mol%]. All reported results confirm that the LN:In is a very promising candidate for several non-linear devices as Pockels cells for laser Q-switching.

Published
2017

30. Recent advances in Electro-optic and their link with the photorefractive properties of doped congruent lithium-niobate crystals

Author

Aillerie, Michel, Kokanyan, Edvard, Movsesyan, Anush, Danielyan, Anush, Kokanyan, Ninel, Abarkan, Mustapha, Abdi, Farid, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Institute for Physical Research of National Academy of Sciences of Armenia (IPR NAS RA), National Academy of Sciences of the Republic of Armenia [Yerevan] (NAS RA), Laboratoire d'Informatique, Mathématique, Automatique et Optoelectronique (LIMAO), Université Sidi Mohamed Ben Abdellah (USMBA), Laboratoire Signaux Systèmes et Composants, and Sidi Mohammed Ben Abdellah University

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.NRJ]Engineering Sciences [physics]/Electric power, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract

International audience

Published
2016

33. Propriétés Electro-Optiques et Electriques du Cristal SBN

Author

Abarkan, Mustapha, Salvestrini, Jean-Paul, Aillerie, Michel, Fontana, M.D., Laboratoire d'Informatique, Mathématique, Automatique et Optoelectronique (LIMAO), Université Sidi Mohamed Ben Abdellah (USMBA), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), and Aillerie, Michel

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NRJ]Engineering Sciences [physics]/Electric power, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.TRON] Engineering Sciences [physics]/Electronics, ComputingMilieux_MISCELLANEOUS, [SPI.NRJ] Engineering Sciences [physics]/Electric power, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract

International audience

Published
2010

35. Electro-optic and dielectric properties of Hafnium-doped congruent lithium niobate crystals

Author

Abarkan, Mustapha, Aillerie, Michel, Salvestrini, Jean-Paul, Fontana, Marc, Kokanyan, Edvard, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), Université de Lorraine (UL)-CentraleSupélec, Institute for Physical Research (IPR), National Academy of Sciences of the Republic of Armenia [Yerevan] (NAS RA), and CentraleSupélec-Université de Lorraine (UL)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract

We report the optical and dielectric properties in hafnium (Hf)-doped lithium niobate (LN) crystals. We investigated samples of congruent composition with various doping concentration varying from 0 to 8 mol%. The clamped and unclamped values of the electro-optic coefficient r 22 of Hf-doped LN and the corresponding dielectric permittivity as well, have been experimentally determined and compared with the results obtained in undoped congruent LN crystals. We show that the electro-optic and dielectric properties are only slightly affected by the introduction of hafnium ions, and therefore Hf-doped LN has the advantage of low photorefractive damage compared with the undoped congruent LN.

Published
2008

37. Étude et analyse de la réponse électro-optique temporelle : Applications à la caractérisation de plusieurs cristaux optiques non linéaires et à l'optimisation des cellules de Pockels pour le déclenchement d'impulsion laser

Author

Abarkan, Mustapha, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Université Paul Verlaine - Metz, Marc Fontana, and UL, Thèses

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, Céllule de Pockels, Optoélectronique, Biréfringence, [SPI.OTHER] Engineering Sciences [physics]/Other
Abstract

Not available, Dans ce mémoire, nous avons établi, dans un premier temps, le cahier des charges d'une cellule de Pockels. Nous avons ainsi défini un ensemble de facteurs de mérite qui dépendent de plusieurs paramètres physiques : propriétés électro-optique, conductivité thermique et électrique... Dans un second temps, nous avons mis au point une technique de caractérisation EO basée sur la réponse temporelle du matériau à des échelons de tensions permettant l'obtention des différentes contributions (acoustique et ionique). Nous avons ensuite déterminé les différents facteurs de mérite pour plusieurs cristaux susceptibles d'intégrer une cellule de Pockels : LiNbO3 dans les deux compositions congruente et stoechiométrique, LiTaO3, KTP et BBO. L'ensemble de cette étude a mis en évidence l'avantage d'utiliser un cristal de LiNbO3 stoechiométrique dans une cellule de Pockels.

Published
2002

38. Effet électro-optique : Applications et Méthodes de mesures. Caractérisation des cristaux de niobate de lithium

Author

Aillerie, Michel, Fontana, M.D., Theofanous, N., Abdi, F., Chah, K., Abarkan, Mustapha, Aillerie, Michel, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Laboratoire Signaux Systèmes et Composants (LSSC), FST Fès, and Université de Lorraine (UL)-CentraleSupélec

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2000

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