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Symptomatic Tarlov Cysts and Occupational Outcome: A Case Report

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Occupational Diseases and Environmental Medicine 2023年第2期11卷 115-121页

作者： Belhadj Chabbah Narjes Aloui Asma athimni zeineb Nakhli Rania Bouhoula Maroua Chelly Farah Chouchane Asma Kacem Imène Maoua Maher Brahem Aicha Kalboussi Houda Elmaalel Olfa Chatti Souhail Mrizek Najib Faculty of Medicine of Sousse University of Sousse Sousse Tunisia Department of Occupational Medicine University Hospital Farhat Hached Sousse Tunisia Department of Occupational Medicine University Hospital Sahloul Sousse Tunisia

Tarlov cysts are often asymptomatic and incidentally discovered. However, in few cases, these cysts can be symptomatic and may manifest as chronic low back pain. We report a case of a Tarlov cyst incidentally diagnosed by MRI in a wiring factory worker complaining of chronic low back pain exacerbated with the carrying of heavy loads and the hyper solicitation of the lumbar spine during his professional activity. The clinical manifestations of symptomatic Tarlov cysts can influence the life quality of patients and have enormous repercussions on their work ability, which in some cases can lead to job loss. Thus, the socio-professional aspects of symptomatic Tarlov cysts should not be underestimated and maintaining these patients in employment should be considered from the outset as an objective in its own right in the management.

关键词： Tarlov Cysts Neurosurgery Occupational Outcomes

Efficient Electromagnetic Wave Absorption and Thermal Infrared Stealth in PVTMS@MWCNT Nano‑Aerogel via Abundant Nano‑Sized Cavities and Attenuation Interfaces

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Nano-Micro Letters 2024年第1期16卷 370-383页

作者： Haoyu Ma Maryam Fashandi zeineb Ben Rejeb Xin Ming Yingjun Liu Pengjian Gong Guangxian Li Chul B.Park College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan University24 Yihuan RoadNanyiduanChengdu 610065SichuanPeople’s Republic of China Microcellular Plastics Manufacturing Laboratory Department of Mechanical and Industrial EngineeringUniversity of Toronto5 King’s College RoadTorontoON M5S 3G8Canada Jiangsu JITRI Advanced Polymer Materials Research Institute Tengfei Building88 Jiangmiao RoadJiangbei New DistrictNanjing 211800JiangsuPeople’s Republic of China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringInternational Research Center for X PolymersZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China

Pre-polymerized vinyl trimethoxy silane(PVTMS)@MWCNT nano-aerogel system was constructed via radical polymerization,sol-gel transition and supercritical CO_(2)*** fabricated organic-inorganic hybrid PVTMS@MWCNT aerogel structure shows nano-pore size(30-40 nm),high specific surface area(559 m^(2)g^(−1)),high void fraction(91.7%)and enhanced mechanical property:(1)the nano-pore size is beneficial for efficiently blocking thermal conduction and thermal convection via Knudsen effect(beneficial for infrared(IR)stealth);(2)the heterogeneous interface was beneficial for IR reflection(beneficial for IR stealth)and MWCNT polarization loss(beneficial for electromagnetic wave(EMW)attenuation);(3)the high void fraction was beneficial for enhancing thermal insulation(beneficial for IR stealth)and EMW impedance match(beneficial for EMW attenuation).Guided by the above theoretical design strategy,PVTMS@MWCNT nano-aerogel shows superior EMW absorption property(cover all Ku-band)and thermal IR stealth property(ΔT reached 60.7℃).Followed by a facial combination of the above nano-aerogel with graphene film of high electrical conductivity,an extremely high electromagnetic interference shielding material(66.5 dB,2.06 mm thickness)with superior absorption performance of an average absorption-to-reflection(A/R)coefficient ratio of 25.4 and a low reflection bandwidth of 4.1 GHz(A/R ratio more than 10)was experimentally obtained in this work.

关键词： Nano-pore size Heterogeneous interface Electromagnetic wave absorption Thermal infrared stealth Nano-aerogel

New Results on PWARX Model Identification Based on Clustering Approach

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International Journal of Automation and computing 2014年第2期11卷 180-188页

作者： zeineb Lassoued Kamel Abderrahim Numerical Control of Industrial Processes National School of Engineers of GabesUniversity of GabesSt Omar Ibn-Khattab 6029 Gabes Tunisia

This paper deals with the problem of piecewise auto regressive systems with exogenous input(PWARX) model identification based on clustering solution. This problem involves both the estimation of the parameters of the affine sub-models and the hyper planes defining the partitions of the state-input regression. The existing identification methods present three main drawbacks which limit its effectiveness. First, most of them may converge to local minima in the case of poor initializations because they are based on the optimization using nonlinear criteria. Second, they use simple and ineffective techniques to remove outliers. Third, most of them assume that the number of sub-models is known a priori. To overcome these drawbacks, we suggest the use of the density-based spatial clustering of applications with noise(DBSCAN) algorithm. The results presented in this paper illustrate the performance of our methods in comparison with the existing approach. An application of the developed approach to an olive oil esterification reactor is also proposed in order to validate the simulation results.

关键词： Hybrid systems piecewise autoregressive systems with exogenous input(PWARX) model clustering identification density-based spatial clustering of applications with noise(DBSCAN) clustering technique experimental validation.

Predictive Control Based on Fuzzy Supervisor for PWARX Hybrid Model

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International Journal of Automation and computing 2019年第5期16卷 683-695页

作者： Olfa Yahya zeineb Lassoued Kamel Abderrahim Numerical Control of Industrial Processes National Engineering School of Gabes University of Gabes

In this paper, the problem of hybrid model predictive control(HMPC) strategy based on fuzzy supervisor for piecewise autoregressive with exogenous input(PWARX) models is addressed. We first represent the nonlinear behavior of the system with a PWARX model. Then, we transform the obtained PWARX model into a mixed logical dynamic(MLD) model in order to apply the proposed predictive control which is able to stabilize such systems along desired reference trajectories while satisfying operating ***, we propose to introduce a fuzzy supervisor allowing the readjustment of the HMPC tuning parameters in order to maintain the desired performance. Simulation and experimental results are presented to illustrate the effectiveness of the proposed approach.

关键词： Nonlinear control hybrid systems mixed logical dynamic(MLD) model predictive control fuzzy supervisor

Characterization of Nano-Silica Local Metakaolin Based-Geopolymer: Microstructure and Mechanical Properties

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Open Journal of Civil Engineering 2020年第2期10卷 143-161页

作者： zeineb Zidi Mounir Ltifi Idrees Zafar Laboratory of Physics of Materials and Nanomaterials Applied to Environment (LaPhyMNE) Faculty of Sciences of Gabes Gabes University Gabes Tunisia Department of Civil Engineering College of Engineering Al Imam Mohammad Ibn Saud Islamic University Riyadh KSA Department of Civil engineering National Engineering School of Gabes Gabes University Gabes Tunisia

The current study focused on the utilization of local clay for synthesis and characterization of meta-kaolin based geopolymers with and without nano-silica. The control geopolymers, for a compressive strength of 30 MPa, were optimized by using Liquid/Solid ratio of 0.55, NaOH concentration of 10 M and curing at 80°C. The nano silica was added in an extended range of 1%, 2%, 3%, 5%, 7% and 10%. The synthesized nano-silica metakaolin based geopolymers was investigated by using compressive strength, XRD, XRF, FTIR, SEM, MIP, TG, UV/VIS spectroscopy, in addition to density, water absorption and initial setting times. The results indicated an increase in the compressive strength value with the incorporation of nano-silica in geopolymer mixes until the optimum percentage of 5%, while the 10% addition of nano-silica decreased the compressive strength by 5% as compared to the control geopolymer. The increase in the compressive strength was accredited to the increase in the content of N-A-S-H gel and the amorphous structure as shown by XRD and FTIR analysis. In addition, the optical transmittance analysis, MIP and SEM scans along with the results of density and water absorption have clearly shown the densification of the matrix formed for the optimal percentage of nano-silica. However, the initial setting time was found to reduce substantially with increase of nano-silica content. Moreover, the TG results have shown the 5% nano-added geopolymers to have greater thermal stability as compared to reference geopolymers

Adaptive responses to drought of two Retama raetam subspecies from Tunisia

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Journal of Plant Ecology 2021年第3期14卷 527-540页

作者： Ricardo Gil Dhikra Zayoud zeineb Ouerghi Monica Boscaiu Oscar Vicente Mohamed Neffati Instituto de Biologfa Molecular y Celular de Plantas(IBMCP UPV-CSIC)Universitat Politecnica de Valencia46022 ValenciaSpain Laboratoire des Ecosystemes Pastoraux et Valorisation des Plantes Spontanees et des Micro-organismes Associes Institut des Regions AridesUniversite de Gabes4119 MedenineTunisia Departement de Biologie Faculte des Sciences de Tunis1060 TunisTunisia Instituto Agroforestal Mediterraneo(IAM) Universitat Politecnica de Valencia46022 ValenciaSpain Instituto de Conservacion y Mejora de la Agrodivcrsidad Valenciana(COMAV) Universitat Politecnica de Valencia46022 ValenciaSpain

Aims The survival and ecological distribution of plants in arid habitats are mainly conditioned by water availability and physiological adaptations to withstand *** the present study,we have compared the physiological responses to drought of two Retama raetam(retama)subspecies from Tunisia,one of them living under the desert climate(***)and the other one growing on the coast(***).Methods To physiologically characterize the two *** subspecies,and to elucidate their main mechanisms underlying their tolerance to drought stress,parameters related to seed germination,growth,photosynthesis(net photosynthetic rate,intracellular CO_(2) concentration,transpiration rate,stomatal conductance and water-use efficiency)and accumulation of osmolytes(proline,glycine betaine[GB]and soluble sugars)were determined in 4-month-old plants subjected to stress for up to 1 *** Findings Drought significantly inhibited germination,growth and all the evaluated photosynthetic *** of *** *** were severely affected by drought after 3 weeks of treatment when photosynthesis rates were up to 7-fold lower than in the *** the same time,proline and GB significantly accumulated compared with the irrigated controls,but much less than in *** ***;in the latter subspecies,proline and GB increased to levels 24-and 6-fold higher,respectively,than in the corresponding *** summary,the population living in the desert region exhibited stronger tolerance to drought stress than that adapted to the semiarid littoral climate,suggesting that tolerance in *** is dependent on accumulation of osmolytes.

关键词： germination leaf gas exchange osmolytes Retama raetam water stress xerophytes

Assessment of Effects of Stress among Healthcare Providers at the Tabarka and Jendouba General Hospital’s Emergency Service Units in Northern Tunisia

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Health 2015年第8期7卷 910-914页

作者： Neila Maaroufi Jalel Rzeigui Lotfi Ayari zeineb Abid Mahassen Dhaouadi Hadda Saidi Emergency Service General Hospital of Jendouba Jendouba Tunisia Emergency Service General Hospital of Tabarka Tabarka Tunisia

The study assessed the relationship between exposure to stress and posttraumatic symptoms among nurses and physicians in a Jendouba general hospital. Hospital staff who were exposed to stress were assessed for posttraumatic stress disorder. High levels of stress symptoms were found in physicians and nurses. Logistic regression analysis showed that nurses had an increased risk for posttraumatic stress disorder factors characterized by negative behavior to patient, increased workload excessive ambiguity and role conflict and the lack of free. These findings showed that nurses suffered from more severe posttraumatic symptoms compared to physicians after exposure to prolonged stress. The gap between physicians and nurses warrants further study.

关键词： Stress Hospital Personnel Nursing Depressive Symptoms Workload

Mid-infrared Ⅲ-Ⅴ semiconductor lasers epitaxially grown on Si substrates

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Light(Science & Applications) 2022年第7期11卷 1366-1378页

作者： Eric Tournié Laura Monge Bartolome Marta Rio Calvo zeineb Loghmari Daniel A.Díaz-Thomas Roland Teissier Alexei N.Baranov Laurent Cerutti Jean-Baptiste Rodriguez IES University of MontpellierCNRS34000 MontpellierFrance

There is currently much activity toward the integration of mid-infrared semiconductor lasers on Si substrates for developing a variety of smart,compact,sensors based on Si-photonics integrated *** review this rapidly-evolving research field,focusing on the epitaxial integration of antimonide lasers,the only technology covering the whole mid-to-far-infrared spectral *** explain how a dedicated molecular-beam epitaxy strategy allows for achieving high-performance GaSb-based diode lasers,InAs/AlSb quantum cascade lasers,and InAs/GaInSb interband cascade lasers by direct growth on on-axis(001)Si substrates,whereas GaAs-on-Si or GaSb-on-Si layers grown by metal-organic vapor phase epitaxy in large capability epitaxy tools are suitable templates for antimonide laser *** also show that etching the facets of antimonide lasers grown on Si is a viable approach in view of photonic integrated ***,this review shows that while diode lasers are sensitive to residual crystal defects,the quantum cascade and interband cascade lasers grown on Si exhibit performances comparable to those of similar devices grown on their native substrates,due to their particular band structures and radiative recombination *** device lifetimes have been extrapolated for interband cascade ***,routes to be further explored are also presented.

关键词： epitaxial quantum template