105 research outputs found

    Commande multivariable du moteur asynchrone triphasé à cage par variation de fréquence

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    La commande du moteur asynchrone triphasé à cage alimenté par des convertisseurs est traitée comme celle d’un système multivariable. L’étude du comportement du moteur a été réalisée en simulation, avec différentes valeurs de la fréquence d’alimentation, pour justifier le choix de l’onduleur. Le programme de simulation établi permet d’avoir toutes les caractéristiques en introduisant les paramètres de construction du moteur. Les résultats obtenus sont utilisés pour faire l’analyse et la synthèse du système à l’aide du logiciel MATLAB.Mots-clés : commande, système multivariable, variation de fréquence, asynchron

    A Method to Design Compact Dual-rail Asynchronous Primitives

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    ISBN 978-3-540-29013-1International audienceThis paper aims at introducing a method to quickly design compact dual-rail asynchronous primitives. If the proposed cells are dedicated to the design of dual-rail asynchronous circuits, it is also possible to use such primitives to design dual-rail synchronous circuits. The method detailed herein has been applied to develop the schematics of various basic primitives. The performances of the 130nm obtained cells have been simulated and compared with more traditional implementations

    Acute Appendicitis Seen at Analankininina University Hospital during the Covid-19 Pandemic

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    Acute appendicitis was often diagnosed at the complication stage during the Covid19 pandemic at CHU Analankininina Toamasina. Our objective was to discuss the particularity of the management of appendicitis during the pandemic. Our study was prospective, descriptive for 6 months and took place in the general surgery department of the Analankininina Toamasina University Hospital Center, Madagascar from March 2020 to August 2020. We had collected 28 patients. The sex ratio was 3.66. The average age was 27.57 years. Appendicular abscess represented 64.29% (n=18) of the appendicular patients operated in emergency. Appendicular plastron occupied 14.29% (n=2) and generalized acute peritonitis was 7.14% (n=2). Post-operative follow-up was simple in 71.43% (n=20). The average length of hospitalization was 4 days. Acute appendicitis is often complicated during the Covid 19 pandemic in our hospital center. Surgery was systematic in our hospital, contrary to some literature which advocated antibiotic therapy at an early stage in front of the health emergency

    Clinico-radiological criteria versus GeneXpert for diagnosis of pediatric tuberculosis

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    Background: Diagnosing tuberculosis in children remains a challenge especially in low-income countries. The aim of this study was to assess the performance of the scoring system combined to chest x-ray images compared to GeneXpert for diagnosis of pediatric tuberculosis.Methods: A retrospective diagnostic accuracy study was carried out on hospitalized children aged 0 to 14 years old, tuberculosis suspect in the pediatric department of the Tsaralalana mother child university hospital center from August 2018 to June 2020.Results: Fifty-one medical files were retained. The mean age was 4±2 years old with a sex ratio of 1.55. The reason for consultation was dominated by respiratory signs (56.9%). The GeneXpert was positive in 58.9% of cases. The chest X-ray images were pathological in all cases, dominated by images of condensation or infiltration (72.5%). WHO score was positive (≥7) in 72.5% of cases. The clinico-radiological criteria had a sensitivity of 13.3-63.3%, a specificity of 61.9-95.2%, positive predictive values of 1.5-6.9% and negative predictive values of 98.8-99.3%.Conclusion: Clinico-radiological criteria could be useful in individual diagnosis of pediatric tuberculosis

    Connaissance, Attitude et Pratique des Médecins de Toamasina I Sur la Prévention du Cancer du Col de l’Utérus

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    Introduction: L’objectif de cette étude vise à décrire la connaissance, l’attitude et la pratique des médecins de de Toamasina I sur la prévention du cancer du col utérin. Méthodes: Il s’agissait d’une enquête transversale descriptive du 1er Novembre 2020 au 31 Janvier 2021. La connaissance ou la pratique était supposée suffisante si 75% ou plus des médecins trouvent la bonne réponse à la question posée. Cette étude a obtenu l’autorisation des chefs hiérarchiques ainsi que le consentement des participants. Résultats : L’âge médian des 74 participants se situait à 40 ans. Ils étaient médecins généralistes, pratiquant à moins de 10ans, exerçant dans un centre public respectivement : 71,60% ; 45,90% ; 63,50%. Ils savaient dans 98,6% que l’HPV favorise le développement de cancer du col utérin. Les enquêtés ont réponses justes aux moyens de dépistage dans 78,10%. Ils estimaient dans 93,20% que le cancer du col peut être guéri s’il est découvert précocement. La proposition d’un dépistage aux femmes cibles, la prescription de frottis cervico-utérin et la pratique de l’IVA étaient évaluées respectivement : 93,20% ; 48,70% ; 25,70%. Discussion: Ces médecins avaient de bonnes connaissances mais ils manquaient de pratique probablement à cause de plateau technique insuffisante. Ces résultats ne reflètent pas la réalité des médecins malgaches. Conclusion: Les médecins possédaient des connaissances relativement suffisantes mais la mise en pratique était encore insuffisante. La formation post universitaire et la mise en place d’un plateau technique adéquat sont nécessaires. Introduction: The objective of thisstudyis to describe the knowledge, attitude and practice of doctors in Toamasina I on cervical cancer prevention. Methods: This was a descriptive cross-sectionalsurveyfrom 1 November 2020 to 31 January 2021. Knowledge or practicewasassumed to besufficient if 75% or more of the doctorsfound the correct answer to the question asked. This studyobtained the permission of the line managers and the consent of the participants. Results: The medianage of the 74 participants was 40years. Theyweregeneralpractitioners, practisingwithin 10 years, working in a public centre respectively: 71.60%; 45.90%; 63.50%. Theyknewin 98.6% that HPV promotes the development of cervical cancer. The respondentsindicatedin 82.40% that the anti-HPV vaccine exists. They gave two correct answers to the means of screening in 78.10%. In 93.20% of cases, theyconsideredthat cervical cancer canbecured if itisdiscoveredearly. The proposal of screening to targetwomen, the prescription of cervicalsmear and the practice of VIA wereevaluatedrespectively: 93.20%; 48.70%; 25.70%. Discussion : Thesedoctorshad good knowledge but lacked practice, probably due to insufficienttechnicalequipment. Theseresults do not reflect the reality of Malagasy doctors. Conclusion: The doctorshadrelativelysufficientknowledge but the practical application wasstillinsufficient. Postgraduate training and the establishment of an adequatetechnicalplatform are necessary

    Connaissance, Attitude et Pratique des Médecins de Toamasina I sur la Prévention du Cancer du Col de l’Utérus

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    Introduction L’objectif de cette Ă©tude vise Ă  dĂ©crire la connaissance, l’attitude et la pratique des mĂ©decins de de Toamasina I sur la prĂ©vention du cancer du col utĂ©rin. MĂ©thodes Il s’agissait d’une enquĂŞte transversale descriptive du 1er Novembre 2020 au 31 Janvier 2021. La connaissance ou la pratique Ă©tait supposĂ©e suffisante si 75% ou plus des mĂ©decins trouvent la bonne rĂ©ponse Ă  la question posĂ©e. Cette Ă©tude a obtenu l’autorisation des chefs hiĂ©rarchiques ainsi que le consentement des participants.L’âge mĂ©dian des 74 participants se situait Ă  40 ans. Ils Ă©taient mĂ©decins gĂ©nĂ©ralistes, pratiquant Ă  moins de 10ans, exerçant dans un centre public respectivement : 71,60% ; 45,90% ; 63,50%. Ils savaient dans 98,6% que l’HPV favorise le dĂ©veloppement de cancer du col utĂ©rin. Les enquĂŞtĂ©s ont indiquĂ© dans 82,40% que le vaccin anti-HPV existe. Ils avaient donnĂ© deux rĂ©ponses justes aux moyens de dĂ©pistage dans 78,10%. Ils estimaient dans 93,20% que le cancer du col peut ĂŞtre guĂ©ri s’il est dĂ©couvert prĂ©cocement. La proposition d’un dĂ©pistage aux femmes cibles, la prescription de frottis cervico-utĂ©rin et la pratique de l’IVA Ă©taient Ă©valuĂ©es respectivement : 93,20% ; 48,70% ; 25,70%. Discussion Ces mĂ©decins avaient de bonnes connaissances mais ils manquaient de pratique probablement Ă  cause de plateau technique insuffisante. Ces rĂ©sultats ne reflètent pas la rĂ©alitĂ© des mĂ©decins malgaches. Conclusion Les mĂ©decins possĂ©daient des connaissances relativement suffisantes mais la mise en pratique Ă©tait encore insuffisante. La formation post universitaire et la mise en place d’un plateau technique adĂ©quat sont nĂ©cessaires.  Introduction The objective of this study is to describe the knowledge, attitude and practice of doctors in Toamasina I on cervical cancer prevention. Methods This was a descriptive cross-sectional survey from 1 November 2020 to 31 January 2021. Knowledge or practice was assumed to be sufficient if 75% or more of the doctors found the correct answer to the question asked. This study obtained the permission of the line managers and the consent of the participants. Results The median age of the 74 participants was 40 years. They were general practitioners, practising within 10 years, working in a public centre respectively: 71.60%; 45.90%; 63.50%. They knew in 98.6% that HPV promotes the development of cervical cancer. The respondents indicated in 82.40% that the anti-HPV vaccine exists. They gave two correct answers to the means of screening in 78.10%. In 93.20% of cases, they considered that cervical cancer can be cured if it is discovered early. The proposal of screening to target women, the prescription of cervical smear and the practice of VIA were evaluated respectively: 93.20%; 48.70%; 25.70%. Discussion These doctors had good knowledge but lacked practice, probably due to insufficient technical equipment. These results do not reflect the reality of Malagasy doctors. Conclusion The doctors had relatively sufficient knowledge but the practical application was still insufficient. Postgraduate training and the establishment of an adequate technical platform are necessary.&nbsp

    Connaissance, Attitude et Pratique des Médecins de Toamasina I sur la Prévention du Cancer du Col de l’Utérus

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    Introduction L’objectif de cette Ă©tude vise Ă  dĂ©crire la connaissance, l’attitude et la pratique des mĂ©decins de de Toamasina I sur la prĂ©vention du cancer du col utĂ©rin. MĂ©thodes Il s’agissait d’une enquĂŞte transversale descriptive du 1er Novembre 2020 au 31 Janvier 2021. La connaissance ou la pratique Ă©tait supposĂ©e suffisante si 75% ou plus des mĂ©decins trouvent la bonne rĂ©ponse Ă  la question posĂ©e. Cette Ă©tude a obtenu l’autorisation des chefs hiĂ©rarchiques ainsi que le consentement des participants.L’âge mĂ©dian des 74 participants se situait Ă  40 ans. Ils Ă©taient mĂ©decins gĂ©nĂ©ralistes, pratiquant Ă  moins de 10ans, exerçant dans un centre public respectivement : 71,60% ; 45,90% ; 63,50%. Ils savaient dans 98,6% que l’HPV favorise le dĂ©veloppement de cancer du col utĂ©rin. Les enquĂŞtĂ©s ont indiquĂ© dans 82,40% que le vaccin anti-HPV existe. Ils avaient donnĂ© deux rĂ©ponses justes aux moyens de dĂ©pistage dans 78,10%. Ils estimaient dans 93,20% que le cancer du col peut ĂŞtre guĂ©ri s’il est dĂ©couvert prĂ©cocement. La proposition d’un dĂ©pistage aux femmes cibles, la prescription de frottis cervico-utĂ©rin et la pratique de l’IVA Ă©taient Ă©valuĂ©es respectivement : 93,20% ; 48,70% ; 25,70%. Discussion Ces mĂ©decins avaient de bonnes connaissances mais ils manquaient de pratique probablement Ă  cause de plateau technique insuffisante. Ces rĂ©sultats ne reflètent pas la rĂ©alitĂ© des mĂ©decins malgaches. Conclusion Les mĂ©decins possĂ©daient des connaissances relativement suffisantes mais la mise en pratique Ă©tait encore insuffisante. La formation post universitaire et la mise en place d’un plateau technique adĂ©quat sont nĂ©cessaires.  Introduction The objective of this study is to describe the knowledge, attitude and practice of doctors in Toamasina I on cervical cancer prevention. Methods This was a descriptive cross-sectional survey from 1 November 2020 to 31 January 2021. Knowledge or practice was assumed to be sufficient if 75% or more of the doctors found the correct answer to the question asked. This study obtained the permission of the line managers and the consent of the participants. Results The median age of the 74 participants was 40 years. They were general practitioners, practising within 10 years, working in a public centre respectively: 71.60%; 45.90%; 63.50%. They knew in 98.6% that HPV promotes the development of cervical cancer. The respondents indicated in 82.40% that the anti-HPV vaccine exists. They gave two correct answers to the means of screening in 78.10%. In 93.20% of cases, they considered that cervical cancer can be cured if it is discovered early. The proposal of screening to target women, the prescription of cervical smear and the practice of VIA were evaluated respectively: 93.20%; 48.70%; 25.70%. Discussion These doctors had good knowledge but lacked practice, probably due to insufficient technical equipment. These results do not reflect the reality of Malagasy doctors. Conclusion The doctors had relatively sufficient knowledge but the practical application was still insufficient. Postgraduate training and the establishment of an adequate technical platform are necessary.&nbsp
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