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Fianarantsoa, Madagascar

Yu J.G.,Henan Polytechnic University | Ratolojanahary F.E.,University of Fianarantsoa | Lefebvre J.E.,University of Lille Nord de France | Lefebvre J.E.,University of Valenciennes and HainautCambresis | Lefebvre J.E.,CNRS Institute of Electronics, Microelectronics and Nanotechnology
Composite Structures | Year: 2011

In this paper, a dynamic solution for the propagating viscoelastic waves in functionally graded material (FGM) plates subjected to stress-free conditions is presented in the context of the Kelvin-Voigt viscoelastic theory. The FGM plate is composed of two orthotropic materials. The material properties are assumed to vary in the thickness direction according to a known variation law. The three obtained wave equations are divided into two groups, which control viscoelastic Lamb-like wave and viscoelastic SH wave, respectively. They are solved respectively by the Legendre orthogonal polynomial series approach. The validity of the method is confirmed through a comparison with the Lamb wave solution of a pure elastic FGM plate and a comparison with the SH wave solution of a viscoelastic homogeneous plate. The dispersion curves and attenuation curves for the graded and homogeneous viscoelastic plates are calculated to highlight their differences. The viscous effect on dispersion curves is shown. The influences of gradient variations are illustrated. © 2011 Elsevier Ltd. Source


Julie Z.N.,University of Antananarivo | Arivelo R.Z.,University of Fianarantsoa | Hendriso R.D.,University of Antananarivo | Ramamonjisoa A.,University of Antananarivo | Andry R.,University of Antananarivo
African Health Sciences | Year: 2014

Introduction: The diagnosis of post streptococcal diseases is usually confirmed by immunological tests. Only the antistreptolysin O is usually prescribed by physician. This study aimed to describe the current practice of these requests in Antananarivo. Methods: It was a retrospective and descriptive study conducted at the Para clinic Unit of Immunology at the University Center Hospital of Antananarivo. We analyzed all requests during seven years, from January 2003 to December 2009. We looked at age, gender, and clinical symptoms which led to the request and the result for each request. Results: We retained 4143 requests for antistreptolysin O titration in our study. The mean age of the study participants was 32.9 years with 18.3% of participants being less than 15 years old. The main symptoms leading to the request of this analysis were rheumatologic (41%), followed by neurological (13.9%) and cardiologic symptoms (8.5%) and 19.4% were prescribed for various symptoms. Only 15% of all requests had a value more than 200 U/ml. Conclusion: Our study found that in most of requests, ASO titre levels were not significant. Source


Andrianampy H.A.,University of Fianarantsoa | Rakotomahenina H.,University of Fianarantsoa | Rakotondraisoa J.M.,University of Fianarantsoa | Andrianampanalinarivo H.R.,University of Antananarivo | Solofomalala G.D.,University of Fianarantsoa
Journal Africain du Cancer | Year: 2014

Cervical cancer is the first gynecological cancer among African women in terms of frequency and mortality. This cancer is easily accessible to prevention by human papillomavirus (HPV) vaccination and screening by pap smears combined or not with HPV test. In Fianarantsoa, Madagascar, screening methods have been available since 2010. Objectives of this study are to assess medical and paramedical knowledge about cervical cancer history, emphasize reality of this disease in the region, and update prevention and management of precancerous lesions. We found a lack of knowledge concerning cervical cancer history by doctors, nurses, and midwives. Twenty-two invasive cervical cancers have been observed in oncology and gynecology services. None of those women had undergone a planned screening. Screening rate by visual inspection after acetate application was 0.47% and by sporadic pap smears was 1.86%. Positive test was observed in 10% and 8.5%, respectively. Fifty-three women have undergone cryotherapy for precancerous lesions within four years. This study shows that real incidence of cervical cancer must be very high in the community, here in the region and probably in Madagascar, contrasting with misunderstanding of medical and paramedical staff. Screening policy should be put in place and efforts need to be done to increase the level of screening rate and improve prognosis and mortality by cancer. © 2014 Springer-Verlag France. Source


Granet G.,University Blaise Pascal | Granet G.,CNRS Pascal Institute | Andriamanampisoa L.B.,CNRS Pascal Institute | Andriamanampisoa L.B.,University of Fianarantsoa | And 5 more authors.
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2010

We formulate the problem of diffraction by a one-dimensional lamellar grating as an eigenvalue problem in which adaptive spatial resolution is introduced thanks to a new coordinate system that takes into account the permittivity profile function. We use the moment method with triangle functions as expansion functions and pulses as test functions. Our method is successfully compared with the Fourier modal method and the frequency domain finite difference method. © 2010 Optical Society of America. Source


Randriamparany J.,University Paul Sabatier | Randriamparany J.,University of Fianarantsoa
CORIA 2011: COnference en Recherche d'Information et Applications - Conference on Information Retrieval and Applications | Year: 2011

This paper presents an information retrieval method based on a two stages indexing. The objective of this work is to analyze the impact of refining indexing and search on a homogeneous sub-collection in the quality of the results. We evaluate the impact of this approach in terms of precision using okapi BM25 and TF-IDF models on TREC-7 and TREC-8 ad hoc collections. The results show that this method improves high precision at least on 44% of the queries. Source

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