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Search Results: 1 - 10 of 28 matches for " Smadhi Hanen "
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Unusual Location of Coelomic Cysts  [PDF]
Smadhi Hanen, Ben Jemai Emna, Diouani Mohamed Fethi, Abdennadhar Mahdi, Attia Monia, Ayadi-Kaddour Aida, Megdiche Mohamed Lamine
Open Journal of Respiratory Diseases (OJRD) , 2018, DOI: 10.4236/ojrd.2018.83004
Abstract: Intrathoracic mesothelial cysts are congenital lesions due to an abnormal development of the pericardial coelom. They are generally unilocular and can develop in various sites. We describe a case of multicystic lesions in the anterior mediastinum of a 53-year-old woman discovered in a context of an encysted pleural effusion. Chest computed tomography (CT) scan revealed multiple cystic lesions in the anterior and posterior mediastinum. Surgery was carried out and histopathology and immunohistochemistry confirmed the diagnosis of multiple coelomic cysts of the mediastinum.
Solitary Endobronchial Papilloma Mimicking a Neoplastic Lesion  [PDF]
Smadhi Hanen, Khalfallah Ikbel, Diouani Mohamed Fethi, Abdennadher Mahdi, Attia Monia, Ayadi-Kaddour Aida, Megdiche Mohamed Lamine
Open Journal of Respiratory Diseases (OJRD) , 2018, DOI: 10.4236/ojrd.2018.83005
Abstract: Papilloma is a rare benign tumor. Laryngeal location is the most frequent. The bronchial involvement remains unusual. It represents 0.38% of pulmonary tumors. We report the case of a 39-year-old, smoker man, who consulted for a cough following during six months with persistent radiological opacity despite antibiotic treatment. The physical examination was without particularities. Flexible bronchoscopy revealed a swollen endobronchial lesion completely obstructing the orifice of the intermediate trunk. Bronchial biopsies at this level showed inflammatory mucosa. The chest CT scan objectified an endobronchial tissular mass in the intermediate trunk. Pulmonary neoplasia was suspected. Diagnostic and therapeutic surgery was performed. Histopathological examination concluded to an endobronchial squamous papilloma.
ANALYSIS AND DESIGN OF A MICROIRRIGATION LATERAL
Lakhdar ZELLA,Dalila SMADHI
Journal of Central European Agriculture , 2006,
Abstract: Micro-irrigation systems are methods of applying water, nutrients and chemicals directly to the plant root area at a controllable rate, which allows maximum results and minimum use of water and energy. For these reasons, microirrigation systems are developed in arid countries with insuffi ciency water resources. It has expanded to many countries engaging in modern agricultural practices due to relatively high agricultural outputs and low energy expenses. For micro-irrigation to be profi table, system design’s must be based on precise calculations and rigorous management. The precision with which micro-irrigation lateral and network’s are designed is of fundamental importance to system operation, the uniformity of distribution of water and fertilizer, and the consumption of energy. The computation model presented in this paper is based on equations of mass and energy conservation within an elemental control volume on the lateral. Considering the variation of the out-fl ow regime leads to an algebraic, coupled and non-linear equation system whose resolution is based on the numeric methods to a defective analytic approach. In this work, the control volume method was selected due to its simplicity. A program of computation has been developed for this and applied to a lateral for the fi rst time. Results from this simple model are precise and are similar to those from other validated models. Precision design increase effi ciency of water and fertilizer distribution. This method can be applied to the design of micro-irrigation lateral’s or network’s.
Un théorème limite pour les covariances des spins dans le modèle de Sherrington--Kirkpatrick avec champ externe
Albert Hanen
Mathematics , 2007, DOI: 10.1214/009117906000000665
Abstract: On \'{e}tudie la covariance (pour la mesure de Gibbs) des spins en deux sites dans le cas d'un mod\`{e}le de Sherrington--Kirkpatrick avec champ externe; lorsque le nombre de sites du mod\`{e}le tend vers l'infini, une \'{e}valuation asymptotique des moments d'ordre $p$ de cette covariance permet d'obtenir un th\'{e}or\`{e}me limite faible avec une loi limite en g\'{e}n\'{e}ral non gaussienne. We study the covariance (for Gibbs measure) of spins at two sites in the case of a Sherrington--Kirkpatrick model with an external field. When the number of sites of the model grows to infinity, an asymptotic evaluation of the $p$ moments of that covariance allows us to obtain a weak limit theorem, with a generally non-Gaussian limit law.
Recurrent Neural Networks Design by Means of Multi-Objective Genetic Algorithm
Hanen Chihi,Najet Arous
International Journal of Computer Science Issues , 2011,
Abstract: Evolutionary algorithms are considered more efficient for optimal system design because they can provide higher opportunity for obtaining the global optimal solution. This paper introduces a method for construct and train Recurrent Neural Networks (RNN) by means of Multi-Objective Genetic Algorithms (MOGA). The use of a multi-objective evolutionary algorithm allows the definition of many objectives in a natural way. The case study of the proposed model is the phoneme recognition. We have shown that the proposed model is able to achieve good results in recognition tasks.
Effect of the Width of the NRD Waveguide on the S Parameter of a Pass Band Filter  [PDF]
Harizi Hanen, Lattrach Lassaad, Gharssallah Ali, Garbi Abdelhafedh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2012, DOI: 10.4236/jemaa.2012.410058
Abstract: In this paper, we present a design of a non-radiative dielectric waveguide band pass filter based on hybrid architecture of micro-strip line and non-radiative dielectric waveguide. The simulation with high frequency structure simulator (HFSS) three dimensional analyses are presented, also the influence of the feeding transitions for circuit design is studied. The aim of this work was to study the influence of the width of the NRD waveguide to scattering parameters.
On the zeros of the big $q$-Bessel functions and applications
Fethi Bouzeffour,Hanen Ben Mansour
Mathematics , 2013,
Abstract: This paper deals with the study of the zeros of the big $q$-Bessel functions. In particular, we prove a new orthogonality relations for this functions similar to the one for the classical Bessel functions. Also we give some applications related to the sampling theory.
Asthma-Like Tracheo-Bronchial Amyloidosis  [PDF]
Fatma Chermiti Ben Abdallah, Hanene Smadhi, Ridha Mahouachi, Amel Chtourou, Sofia Taktak, Ayda Ayadi, Faouzi El Mezni, Ali Ben Kheder
Open Journal of Respiratory Diseases (OJRD) , 2012, DOI: 10.4236/ojrd.2012.22008
Abstract: Localized bronchial Amyloidosis is an uncommon disease of unknown origin. Clinical signs are not specific. Tracheobronchial symptoms are the most frequent. We report a case of a 31 year-old man complaining of asthma-like dyspnea. Bronchoscopy was performed because of ineffectiveness of antiasthmatic treatment, showed a submucosal infiltration with stenosis of both right and left upper bronchi and a complete stenosis of intermediate troncus. Multiple biopsies were performed and concluded to Amyloidosis of AL type. Oral corticosteroids were indicated with clinical improvement.
Segmenting and Supervising an ECG Signal by Combining the CWT and PCA
Hanen Chaouch,Khaled Ouni,Lotfi Nabli
International Journal of Computer Science Issues , 2012,
Abstract: In this paper we go about the segmentation and analysis of an electrocardiographic (ECG) signal. Firstly, it consists in working out the locations of different characteristic waves of this signal: the QRS complex and the waves P and T, successively and in the order of magnitude and their amplitude. Secondly, we go about the analysis of this signal by the linear principal component analysis (LPCA) based on the results found in the first part. The importance of this algorithm comes in the context of the ECG supervision and then the cardiovascular system. This algorithm integrates the multi-scale wavelet analysis and principal component analysis. This analysis allows us, first, to apply the continuous wavelet transform (CWT) on the totality of the signal. After that, based on the property of the CWT regularity, the waves will be detected after a thresholding operation. To evaluate the segmentation algorithm two parameters are introduced, the sensitivity Se and the predictive value P+. The results have given an average of Se=99.93% and P+=99.96%, which indicates that our segmentation algorithm is sufficiently reliable in comparison to the real database. In the supervision of the ECG, we use the detected parameters to construct the data-matrix of the LPCA. The defects are detected and located by this tool in order to determine the existing failure in the used signal. Comparing our results with those of the expert, we find that the LPCA gives a concrete state of the cardiovascular system.
Surface Plasmon Resonance for C-Reactive Protein Detection in Human Plasma  [PDF]
Hanen Chammem, Imen Hafaid, Olivier Meilhac, Farid Menaa, Laurence Mora, Adnane Abdelghani
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2014, DOI: 10.4236/jbnb.2014.53018
Abstract:

In this work, we describe an approach of detecting biomarkers by Surface Plasmon Resonance imaging (SPRi) technique in real samples. Two C-Reactive Protein (CRP)-antibody immobilization methods were used: The first method was based on direct physisorption of CRP-antibody onto gold surface; the second one was based on oriented CRP-antibody with protein G intermediate layer. The two developed immunosensors were tested against CRP antigen in phosphate buffer saline solution with the SPRi technique. The response of the developed immunosensors was reproducible and stable. The detection limit of 10 pg·mL-1 and 50 pg·mL-1 CRP-antigen was observed with and without protein G respectively with this technique. Moreover, the developed SPRi immunosensor was used for CRP-antigen detection in human plasma. A detection limit of 5 ng·mL-1 and 10 ng·mL-1 was obtained with and without protein G respectively. These obtained results were compared to those obtained with QCM (Quartz Crystal Microbalance) and Enzyme-Linked Immunosorbent Assay (ELISA) techniques.

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