Résultat de la recherche
4 recherche sur le tag
'sensitivity' 
Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche Interroger des sources externes
Titre : Étude de cristaux photoniques en silicium pour l'application à la biodétection Type de document : texte imprimé Auteurs : Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 120 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity البلورات الضوئية سيليسيوم المستشعرات الضوئية الدليل الموجي التجويف .FDTD-2D الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection.
Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the
essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted.
Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10845 Étude de cristaux photoniques en silicium pour l'application à la biodétection [texte imprimé] / Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 120 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity البلورات الضوئية سيليسيوم المستشعرات الضوئية الدليل الموجي التجويف .FDTD-2D الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection.
Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the
essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted.
Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10845 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7253 BEN/7253 Thèse Bibliothèque principale Thèses Disponible Étude théorique d’un capteur à base d’une structure originale en cristaux photoniques. / Chayma Mosbah
Titre : Étude théorique d’un capteur à base d’une structure originale en cristaux photoniques. Type de document : texte imprimé Auteurs : Chayma Mosbah, Auteur ; Mohamed Bouchemat, Directeur de thèse ; Ahlem Benmerkhi, Directeur de thèse Mention d'édition : 10/12/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 140 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Electronique: Micro et Nanotechnologies Cristaux photoniques Microcavités Capteurs à indice de réfraction facteur de qualité Sensibilité FDTD "
photonic crystal microcavity refractive index sensors quality factor sensitivity البلورات الضوئية فجوة استشعار معامل الانكسار الحساسيةIndex. décimale : 621 Electronique Résumé :
In this thesis we consider the study and the design of new structures of refractive index sensors based on two-dimensional photonic crystals, and in particular their exploitation in detection domain. The proposed structures are focalized particularly for detecting the refractive index variation. They consist of a guide / cavity coupling according to two configurations. The first configuration consists of a linear coupling (filter). The second configuration is based on a lateral coupling which consists of a juxtaposed linear cavity parallel to the waveguide. Another original structure proposed consists of an air-slot width-modulated line-defect microcavity.
Simulations are performed using the BandSOLVE and FullWAVE simulation software developed by RSoft, based on the Plane Wave Method (PWE) and the Finite Difference Time Domain method (FDTD), respectively. Firstly, we are optimized the quality factor and the transmission, modifying the physical and geometric key parameters of the structure such as: size, position and shape of holes. We studied the sensitivity by optimizing the detection performance (sensitivity and detection limit). To do this, we introduced an air slot in the cavity center. This configuration makes it possible to considerably increase the light-matter interaction and induces a strong confinement of the light within the cavity. Obtained results concerning the sensitivity are convincing: S = 400
nm / RIU: this structure can be used as an index variation sensor.
Diplôme : Doctorat En ligne : ../theses/electronique/MOS7690.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11524 Étude théorique d’un capteur à base d’une structure originale en cristaux photoniques. [texte imprimé] / Chayma Mosbah, Auteur ; Mohamed Bouchemat, Directeur de thèse ; Ahlem Benmerkhi, Directeur de thèse . - 10/12/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 140 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Electronique: Micro et Nanotechnologies Cristaux photoniques Microcavités Capteurs à indice de réfraction facteur de qualité Sensibilité FDTD "
photonic crystal microcavity refractive index sensors quality factor sensitivity البلورات الضوئية فجوة استشعار معامل الانكسار الحساسيةIndex. décimale : 621 Electronique Résumé :
In this thesis we consider the study and the design of new structures of refractive index sensors based on two-dimensional photonic crystals, and in particular their exploitation in detection domain. The proposed structures are focalized particularly for detecting the refractive index variation. They consist of a guide / cavity coupling according to two configurations. The first configuration consists of a linear coupling (filter). The second configuration is based on a lateral coupling which consists of a juxtaposed linear cavity parallel to the waveguide. Another original structure proposed consists of an air-slot width-modulated line-defect microcavity.
Simulations are performed using the BandSOLVE and FullWAVE simulation software developed by RSoft, based on the Plane Wave Method (PWE) and the Finite Difference Time Domain method (FDTD), respectively. Firstly, we are optimized the quality factor and the transmission, modifying the physical and geometric key parameters of the structure such as: size, position and shape of holes. We studied the sensitivity by optimizing the detection performance (sensitivity and detection limit). To do this, we introduced an air slot in the cavity center. This configuration makes it possible to considerably increase the light-matter interaction and induces a strong confinement of the light within the cavity. Obtained results concerning the sensitivity are convincing: S = 400
nm / RIU: this structure can be used as an index variation sensor.
Diplôme : Doctorat En ligne : ../theses/electronique/MOS7690.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11524 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MOS/7690 MOS/7690 Thèse Bibliothèque principale Thèses Disponible
Titre : Seuil de détection du goût des lipides et corpulence. Type de document : texte imprimé Auteurs : Ouassila Allam, Auteur ; Hayet Oulamara, Directeur de thèse ; Naim Akhtar Khan, Directeur de thèse Mention d'édition : 30 /09/ 2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 153 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Nutrition Humaine: Nutrition Humaine goût lipides sensibilité seuil détection IMC apports obésité polymorphisme taste lipids sensitivity detection threshold BMI nutritional intake obesity polymorphism "
الذوق الدهون الحساسية عتبة الكشف مؤشر كتلة الجسم السمنة تعدد الأشكالIndex. décimale : 640 Industrie Alimentaire Résumé : The main objective of this study is to investigate the relationship between fat detection threshold and weight status of adult women The study included 140 women aged from 18 to 50 years old. Exclusion criterias were considered. Weight and height were measured to calculate BMI. Overweight is defined by a BMI 25 and obesity by a BMI 30. The three alternative forced choice (3-AFC) method has been adapted to determine detection thresholds. Individuals were classified DV K\SRVHQVLWLYH mM and hypersensitive < 3 mM. Lipid perception intensity was measured by a gLMS intensity scale. Nutritional intakes were assessed by a 24 hour foodconsumption diaries repeated 3 times. The level of preference towards fatty foods was assessed by a preference questionnaire. Tongue photography was taken to count fungiform papillae. Two polymorphisms of the CD36 gene were studied (rs1761667 and rs1527483) by real-time PCR. The association of the two polymorphisms with obesity has been investigated in 50 women. Statistical analysis is performed with SPSS software. Our results confirm the association between lipid detection thresholds and weight status of women. The anthropometric parameters (BMI, waist circumference, waist circumference / hip circumference ratio and waist circumference / height ratio) are positively associated with the fat detection threshold. Obese participants are the least sensitive to fat taste. Better sensitivity to oleic acid is associated with better intensity of perception and identification of fat in food. Obese subjects have the lowest lipid perception intensity. Impaired lipid detection is possibly related to overweight in adults. Lipids hyposensitivity has been linked to higher intakes of overall energy and fat intake. It is also linked to higher preference for pure fat and salty-fat foods. Reduced taste density is associated with low taste sensitivity and overweight. Obese
people consume more energy and fat and have a greater preference for fat. The study of polymorphism of the two variants-CD36 gene (rs1761667 and rs1527483) confirms its involvement in obesity in our population.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/agronomie/ALL7813.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11645 Seuil de détection du goût des lipides et corpulence. [texte imprimé] / Ouassila Allam, Auteur ; Hayet Oulamara, Directeur de thèse ; Naim Akhtar Khan, Directeur de thèse . - 30 /09/ 2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 153 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Nutrition, Alimentation et Technologies Agro-AlimentairesTags : Nutrition Humaine: Nutrition Humaine goût lipides sensibilité seuil détection IMC apports obésité polymorphisme taste lipids sensitivity detection threshold BMI nutritional intake obesity polymorphism "
الذوق الدهون الحساسية عتبة الكشف مؤشر كتلة الجسم السمنة تعدد الأشكالIndex. décimale : 640 Industrie Alimentaire Résumé : The main objective of this study is to investigate the relationship between fat detection threshold and weight status of adult women The study included 140 women aged from 18 to 50 years old. Exclusion criterias were considered. Weight and height were measured to calculate BMI. Overweight is defined by a BMI 25 and obesity by a BMI 30. The three alternative forced choice (3-AFC) method has been adapted to determine detection thresholds. Individuals were classified DV K\SRVHQVLWLYH mM and hypersensitive < 3 mM. Lipid perception intensity was measured by a gLMS intensity scale. Nutritional intakes were assessed by a 24 hour foodconsumption diaries repeated 3 times. The level of preference towards fatty foods was assessed by a preference questionnaire. Tongue photography was taken to count fungiform papillae. Two polymorphisms of the CD36 gene were studied (rs1761667 and rs1527483) by real-time PCR. The association of the two polymorphisms with obesity has been investigated in 50 women. Statistical analysis is performed with SPSS software. Our results confirm the association between lipid detection thresholds and weight status of women. The anthropometric parameters (BMI, waist circumference, waist circumference / hip circumference ratio and waist circumference / height ratio) are positively associated with the fat detection threshold. Obese participants are the least sensitive to fat taste. Better sensitivity to oleic acid is associated with better intensity of perception and identification of fat in food. Obese subjects have the lowest lipid perception intensity. Impaired lipid detection is possibly related to overweight in adults. Lipids hyposensitivity has been linked to higher intakes of overall energy and fat intake. It is also linked to higher preference for pure fat and salty-fat foods. Reduced taste density is associated with low taste sensitivity and overweight. Obese
people consume more energy and fat and have a greater preference for fat. The study of polymorphism of the two variants-CD36 gene (rs1761667 and rs1527483) confirms its involvement in obesity in our population.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/agronomie/ALL7813.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11645 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALL/7813 ALL/7813 Thèse Bibliothèque principale Thèses Disponible
Titre : Simulation COMSOL Multi physiques d’un Capteur de Gaz SAW Type de document : texte imprimé Auteurs : Emir Bouarroudj, Auteur ; Fouad Kerrour, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2015 Importance : 70 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Matériaux et systèmes micro et nanoélectroniques sensibilité à l’effet de masse fréquence propre SAW COMSOL Multi physique sensitivity natural frequency acoustic waves COMSOL Multi physics Mass Effect الحساسية والتردد الطبيعي الموجات الصوتية COMSOL تأثير الكتلة Index. décimale : 621 Electronique Résumé : In this work, we concerned a study and simulation of micro-sensor surface acoustic wave SAW using the Comsol multi- physique. A sensor SAW constructed of an interdigité transducer (IDT) engraved on a piezoelectric material and covered by a layer sensitive Polyisobutyléne (PIB). Our contribution has focused on determining the effects of influence parameters on the response of a SAW sensor and its sensitivity to mass effect. A comparative study of the response of the SAW sensor (Δ Diplôme : Magistère En ligne : ../theses/electronique/BOU6713.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9910 Simulation COMSOL Multi physiques d’un Capteur de Gaz SAW [texte imprimé] / Emir Bouarroudj, Auteur ; Fouad Kerrour, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2015 . - 70 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Matériaux et systèmes micro et nanoélectroniques sensibilité à l’effet de masse fréquence propre SAW COMSOL Multi physique sensitivity natural frequency acoustic waves COMSOL Multi physics Mass Effect الحساسية والتردد الطبيعي الموجات الصوتية COMSOL تأثير الكتلة Index. décimale : 621 Electronique Résumé : In this work, we concerned a study and simulation of micro-sensor surface acoustic wave SAW using the Comsol multi- physique. A sensor SAW constructed of an interdigité transducer (IDT) engraved on a piezoelectric material and covered by a layer sensitive Polyisobutyléne (PIB). Our contribution has focused on determining the effects of influence parameters on the response of a SAW sensor and its sensitivity to mass effect. A comparative study of the response of the SAW sensor (Δ Diplôme : Magistère En ligne : ../theses/electronique/BOU6713.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9910 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6713 BOU/6713 Thèse Bibliothèque principale Thèses Disponible
