Role of Structural Empowerment on Organizational Conflict Management -Case Study on the Directorate of Maintenance in Laghouat (DML)-

The aim of this research is to highlight the role of structural empowerment and its dimensions on organizational conflict management and its styles from the point of view of the employees of the directorate of maintenance in Laghouat state (DML). Survey data was collected through distributing 100 questionnaires, 96 was recovered. 79 were fit for statistical analysis. Survey data was analysed using structural equation modelling using PLS methodology. After the statistical analysis using the programme (Smart PLS version 3.0), the results showed there is no role of structural empowerment on organizational conflict and its styles

A miniaturized triple-band and dual-polarized monopole antenna based on a CSRR perturbed ground plane

This paper proposes a new triple-band monopole antenna based on Complementary Split Ring Resonators (CSRR) perturbing the ground plane (GND). The antenna consists of an inverted-L-shaped monopole fed by a modified microstrip line with two CSRRs cut out of the ground plane. The operational bands are independently controlled by the CSRR unit cell parameters. In addition, the antenna presents a dual-polarization performance (vertical polarization at 2.4 GHz band and horizontal polarization at both 3.6 and 5.9 GHz bands). The designed antenna is fully planar and low profile avoiding the vias with the ground plane and covering the WLAN, WiMAX, and IEEE 801.11p bands at 2.45, 3.6, and 5.8 GHz. A compact prototype ( 0.32λ0×0.32λ0 being λ0 is the wavelength corresponding to the lowest resonance frequency) has been fabricated and measured showing good agreement between simulations and measurements. The measured impedance bandwidths are 10% (2.38-2.63 GHz), 2.5% (3.54-3.63 GHz), and 20% (5.83-7.12 GHz) whereas the measured gains are 1.34, 0.68, and 2.65 dBi at 2.4, 3.6, and 5.9 GHz respectively.This work was supported by PID2019-109984RB-C41

Pacifica: Poetry International: Revolutions in Tunisian Poetry

A collection of contemporary poetry from Tunisia, including poems in translation with their French and Arabic original texts

Mathematical Modeling and Analysis of the Dynamics of RNA Viruses in Presence of Immunity and Treatment: A Case Study of SARS-CoV-2

The emergence of novel RNA viruses like SARS-CoV-2 poses a greater threat to human health. Thus, the main objective of this article is to develop a new mathematical model with a view to better understand the evolutionary behavior of such viruses inside the human body and to determine control strategies to deal with this type of threat. The developed model takes into account two modes of transmission and both classes of infected cells that are latently infected cells and actively infected cells that produce virus particles. The cure of infected cells in latent period as well as the lytic and non-lytic immune response are considered into the model. We first show that the developed model is well-posed from the biological point of view by proving the non-negativity and boundedness of model’s solutions. Our analytical results show that the dynamical behavior of the model is fully determined by two threshold parameters one for viral infection and the other for humoral immunity. The effect of antiviral treatment is also investigated. Furthermore, numerical simulations are presented in order to illustrate our analytical results

Mathematical Modeling and Analysis of the Dynamics of RNA Viruses in Presence of Immunity and Treatment: A Case Study of SARS-CoV-2

The emergence of novel RNA viruses like SARS-CoV-2 poses a greater threat to human health. Thus, the main objective of this article is to develop a new mathematical model with a view to better understand the evolutionary behavior of such viruses inside the human body and to determine control strategies to deal with this type of threat. The developed model takes into account two modes of transmission and both classes of infected cells that are latently infected cells and actively infected cells that produce virus particles. The cure of infected cells in latent period as well as the lytic and non-lytic immune response are considered into the model. We first show that the developed model is well-posed from the biological point of view by proving the non-negativity and boundedness of model’s solutions. Our analytical results show that the dynamical behavior of the model is fully determined by two threshold parameters one for viral infection and the other for humoral immunity. The effect of antiviral treatment is also investigated. Furthermore, numerical simulations are presented in order to illustrate our analytical results

Design of a Compact Dual-Circular-Polarized Cavity-Backed Spiral Antenna

In this paper, a dual-circular-polarized antenna is presented. The compactness of the design is the greatest contributionof this work, achieving dual circular polarizationwith a single antenna. The design is based on a four-armspiral with differential feeding to achieve the desired polarization. The antenna achieves a bandwidth of 60% (from 4 to 7.5 GHz) for an axial ratio below 3 dB, return losses below-8 dB and isolation below -30 dB. Symmetric radiationpattern with gain higher than 7 dB is obtained

A Compact Design for Dual-band Implantable Antenna Applications

This paper presents the development of a dual-band antenna working in the Industrial, Scientific, and Medical (ISM) band (902 – 928 MHz, 2.4 – 2.5 GHz). The proposed antenna is compact, has a frequency-independent response between the lowest and the highest frequency, has a small size of 6 x 6 x 2.54 mm3. This design does not use any via or defected ground plane making the antenna very useful for this kind of application

La maladie à IgG4: à propos de 3 cas

La maladie à IgG4 encore appelée polyexocrinopathie auto-immune à IgG4 est une nouvelle entité où s´inscrit la PAI de type 1. Elle peut toucher différents organes (système nerveux central, les glandes salivaires, la thyroïde, les poumons, le pancréas, les voies biliaires, le foie, le tube digestif, les reins, la prostate…) avec des symptômes relatifs à l´organe atteint. Elle est plus fréquente chez l´homme de plus de 50 ans. Son incidence et sa prévalence sont mal connues car c´est une maladie peu fréquente. Elle est a priori plus fréquente en Asie et ne représente que 20 à 30% des PAI en occident. Son diagnostic est histologique caractérisé par la présence, dans un contexte d´élévation sérique des IgG4 dans plus de 80% des cas, d´un infiltrat lymphoplasmocytaire dense de l´organe atteint avec positivité des IgG4 en immuno- histochimie, d´une fibrose d´organe et des veinulites oblitérantes. Elle est sensible à la corticothérapie avec un risque de rechute à l´arrêt de la corticothérapie qui n´est pas négligeable et qui conduit alors à l´utilisation d´immunomodulateurs, principalement: les thiopurines (Azathioprine ou le 6-mercaptopurine), le méthotrexate et de façon plus récente le rituximab qui peut être utilisé également comme traitement d´induction. Grâce aux avancées récentes, des critères histologiques et cliniques précis sont maintenant connus permettant de limiter les prises en charge inadaptées telle que la chirurgie. Cependant, de nombreuses lacunes persistent dans nos connaissances: sur la physiopathologie, l´identification de biomarqueurs spécifiques autres que les IgG4, l´histoire naturelle de la maladie et l´évaluation du risque de cancer à long terme, les performances des outils diagnostiques comme la biopsie pancréatique sous échoendoscopie. De même, une prise en charge consensuelle internationale reste à définir dans les phases initiales de la maladie et en cas de rechute. L´objectif de cette étude est de rapporter 3 cas de ML-IgG4 en se basant sur les critères cliniques et radiologiques, la réponse thérapeutique