The Impact of Social Media on Political Efficacy and Real-Life Netizens Political Participation (Lebanon- Case Study)

Purpose: The objective of this study was to explore netizens' external and internal political efficacy as being exposed to political branding on social media and to show how political branding would level up the citizens’ political awareness and boost their participation in voting in the parliamentary election. Lebanon was taken as a case study.   Theoretical framework: Recent literature has reported the impact of social media political branding on youth participation in voting while other studies have been done separately about the impact of social media political branding on citizens’ political efficacy particularly in developed countries. (Binder et al., 2021; Hassan & Ridzuan, 2021; Moorman et al., 2019; Slipetska, 2021; Lau et al., 2021) However, there is still much to investigate about netizens’ political efficacy and participation in a developing country like Lebanon.   Methodology: The study used the deductive approach and was based on using of primary statistical data for testing the hypotheses which have been analyzed by SPSS v22. The population, 491participants, from whom the data was obtained randomly were Lebanese people of age groups over 21 in various provinces.   Findings: Overall, the data reflects a positive correlation of social media impact on voters' political participation, and it implies that the political influence of social media platforms on the self-external and internal efficacy is strong.   Research, Practical & Social Implications: On the Lebanese level, and as the election has been done, it is recommended to measure the youth participation in voting. Also, this study is very beneficial to be used by the governments themselves for fostering the political efficacy of the nations, especially in developing countries.   Originality: This study analyses the role social media does in encouraging citizens’ political efficacy and political participation in voting especially after the offensive revolution Lebanese have done pre- election comparing with many previous parliamentary elections in which participation was so shy and didn’t exceed 49.70 %. (Ministry of Interior and Municipalities, 2018

Contribution to the study of LAMB waves in an anisotropic plate : theory and experiment

Le rayonnement d'une source ultrasonore située sur l'une des interfaces d'une plaque anisotrope est étudié. Le calcul du tenseur de Green est effectué dans le cas général d'un problème 3D. Une décomposition en multiples réflexions /réfractions, constituant une série de rayons au sein de la plaque, est utilisée pour une comparaison théorie-expérience dans le cas d'un mono cristal de Cuivre. La vitesse de phase et la vitesse d'énergie sont mesurées en fonction de la fréquence ou de la direction d'observation, pour une plaque de carbone-époxy unidirectionnels, et comparées avec la théorie.The ultrasonic radiation from a source located on one of the interfaces of an anisotropic plateis studied. The calculation of the Green tensor is performed in the general case of a 3Dproblem. Decomposition into multiple reflections /refractions, as a series of rays in the plate,is used for comparison between theory and experiment in the case of a single crystal of copper. The phase velocity and energy velocity are measured in terms of frequency ordirection of observation, for a plate of unidirectional carbon-epoxy, and compared withtheory

Contribution to the study of LAMB waves in an anisotropic plate : theory and experiment

Le rayonnement d'une source ultrasonore située sur l'une des interfaces d'une plaque anisotrope est étudié. Le calcul du tenseur de Green est effectué dans le cas général d'un problème 3D. Une décomposition en multiples réflexions /réfractions, constituant une série de rayons au sein de la plaque, est utilisée pour une comparaison théorie-expérience dans le cas d'un mono cristal de Cuivre. La vitesse de phase et la vitesse d'énergie sont mesurées en fonction de la fréquence ou de la direction d'observation, pour une plaque de carbone-époxy unidirectionnels, et comparées avec la théorie.The ultrasonic radiation from a source located on one of the interfaces of an anisotropic plateis studied. The calculation of the Green tensor is performed in the general case of a 3Dproblem. Decomposition into multiple reflections /refractions, as a series of rays in the plate,is used for comparison between theory and experiment in the case of a single crystal of copper. The phase velocity and energy velocity are measured in terms of frequency ordirection of observation, for a plate of unidirectional carbon-epoxy, and compared withtheory

Contribution à l'étude des ondes de LAMB dans une plaque anisotrope (théorie et expérience)

Le rayonnement d'une source ultrasonore située sur l'une des interfaces d'une plaque anisotrope est étudié. Le calcul du tenseur de Green est effectué dans le cas général d'un problème 3D. Une décomposition en multiples réflexions /réfractions, constituant une série de rayons au sein de la plaque, est utilisée pour une comparaison théorie-expérience dans le cas d'un mono cristal de Cuivre. La vitesse de phase et la vitesse d'énergie sont mesurées en fonction de la fréquence ou de la direction d'observation, pour une plaque de carbone-époxy unidirectionnels, et comparées avec la théorie.The ultrasonic radiation from a source located on one of the interfaces of an anisotropic plateis studied. The calculation of the Green tensor is performed in the general case of a 3Dproblem. Decomposition into multiple reflections /refractions, as a series of rays in the plate,is used for comparison between theory and experiment in the case of a single crystal of copper. The phase velocity and energy velocity are measured in terms of frequency ordirection of observation, for a plate of unidirectional carbon-epoxy, and compared withtheory.BORDEAUX1-Bib.electronique (335229901) / SudocSudocFranceF

A Semi-Supervised Based K-Means Algorithm for Optimal Guided Waves Structural Health Monitoring: A Case Study

This paper concerns the health monitoring of pipelines and tubes. It proposes the k-means clustering algorithm as a simple tool to monitor the integrity of a structure (i.e., detecting defects and assessing their growth). The k-means algorithm is applied on data collected experimentally, by means of an ultrasonic guided waves technique, from healthy and damaged tubes. Damage was created by attaching magnets to a tube. The number of magnets was increased progressively to simulate an increase in the size of the defect and also, a change in its shape. To test the performance of the proposed method for damage detection, a statistical population was created for the healthy state and for each damage step. This was done by adding white Gaussian noise to each acquired signal. To optimize the number of clusters, many algorithms were run, and their results were compared. Then, a semi-supervised based method was proposed to determine an alarm threshold, triggered when a defect becomes critical