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Symmetrically Harmonic Kaluza-Klein Metrics on Tangent Bundles

Journal of Applied Mathematics and Physics 2022年第12期10卷 3548-3561页

作者： serge degla Leonard Todjihounde Institut de Mathématiques et de Sciences Physiques Porto-Novo Benin Institut de Mathématiques et de Sciences Physiques Porto-Novo Benin

Let (M, g) be a Riemannian manifold and G be a Kaluza-Klein metric on its tangent bundle TM. A metric H on TM is said to be symmetrically harmonic to G if the metrics G and H are harmonic w.r.t. each other;that is the identity maps id: (TM,G) → (TM,H) and id: (TM,H) → (TM,G) are both harmonic maps. In this work we study Kaluza-Klein metrics H on TM which are symmetrically harmonic to G. In particular, we characterize and determine horizontally and vertically conformal Kaluza-Klein metrics H on TM, which are symmetrically harmonic to G.

关键词： Harmonic Maps Kaluza-Klein Metrics Conformal Metrics

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Finslerian Ricci Deformation and Conformal Metrics

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Journal of Applied Mathematics and Physics 2018年第7期6卷 1522-1536页

作者： Gilbert Nibaruta serge degla Léonard Todjihounde Institut de Mathématiques et de Sciences Physiques Porto-Novo Bénin Ecole Normale Supérieure de Natitingou Natitingou Bénin

In this paper, a new Ricci flow is canonically introduced in Finsler Geometry and, under the variance of Finsler-Ehresmann form, conformal changes of Finsler metrics are studied. Some existence conditions of this Finslerian Ricci flow on a compact manifold which preserves the conformal class of the initial metric are obtained as an application.

关键词： Ehresmann Connection Ricci Flow Trace-Free Ricci Tensor Conformal Change of Finsler-Ehresmann Form

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Epidemiology of Anemia at the Internal Medicine Department in Borgou Departmental Hospital Center(DHC)in Parakou(Benin)

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Open Journal of Internal Medicine 2018年第2期8卷 123-130页

作者： Comlan Albert Dovonou Adébayo Alassani Cossi Angelo Attinsounon serge Ade Kadidjatou Sake Jivaterd degla Séraphin Ahoui Moise Adegbindin Prosper Gandaho Djimon Marcel Zannou Fabien Houngbe Isidore Zohoun Medicine Department and Medical Specialities Medical FacultyParakou UniversityParakouBenin Internal Medicine Department Borgou Departmental Teaching HospitalParakouBenin Medicine Department and Medical Specialities of Cotonou Health Science ParakouBenin

Objective: To describe clinical and biological characteristics of anemia in the Internal Medicine department of Borgou Departmental Hospital Center (DHC). Methods: This was a transversal and descriptive study for an analytic purpose. All patients hospitalized in the Internal Medicine department of Borgou DHC who had a hemogram for their care were included in the study. Anemia was defined as a hemoglobin level lower than 12 g/dL for men and lower than 11.5 g/dL for women. Results: Frequency of anemia was 61.8% (76 of 123 patients). Anemia was moderate in 47.4% of the cases and severe in 27.6% of the cases. Basing on the mean corpuscular volume, microcytic anemia accounted for 36.8%, anemia was normocytic in 46.1% and macrocytic in 17.1% of cases. According to the mean corpuscular hemoglobin concentration, normochromic anemia accounted for 81.6% of the series and hypochromic in 18.4%. The most common pathologies found in anemic patients came from digestive origin (17%), the renal causes were also found in 17% of the cases. Cardiac pathologies were responsible for anemia in 13% of cases. Malaria and pulmonary pathologies were responsible for anemia in respectively 12% and 9%. The main factors associated with anemia were young age (young adult) and neurological pathologies. Conclusion: Anemia hospital prevalence is very high in the Internal Medicine Department of Borgou DHC. Awareness of populations and practitioners for the early management of various pathologies which provide anemia could improve this presentation.

关键词： Anemia Internal Medicine Parakou

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Clinical and Immunological Characteristics in HIV-Infected Patients at the Treatment Initiation at the University Hospital of Parakou (Benin)

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Open Journal of Immunology 2017年第3期7卷 51-58页

作者： Dovonou Albert Comlan Alassani Adébayo Cossi Attinsounon Cossi Angelo Saké Kadidjatou Adè serge Ahoui Séraphin degla Jivather Tchégnonsi Tognon Francis Zannou Djimon Marcel Adè Gabriel Houngbé Fabien Departemental Teaching Hospital of Borgou Parakou Benin National Teaching Hospital Cotonou Benin

Goal: To describe the clinical and immunological characteristics in the HIV-infected patients at the antiretroviral treatment initiation. Methods: This was a descriptive and retrospective study on the cohort of the patients living with HIV followed at Parakou teaching hospital from the 1st January 2004 to the 31st December 2012. Persons under the age of 15 and the pregnant women have been excluded from the study. Results: The active file was composed of 988 patients under antiretroviral treatment. They were 339 men and 649 women. The sex ratio was 0.52. The average age of the patients was 35.49 ± 9.72 years. The immunodeficiency was profound with 57.65% of patients at the stage 3 of WHO and 42.35% at the stage 4. Opportunistic infections at the antiretroviral treatment initiation were dominated by oral candidiasis (30.16%), the diarrhea (20.45%) and zona (11.03%). Conclusion: HIV infection touched young adults who consult at an advanced stage of immunodeficiency.

关键词： Clinical Immunological HIV Parakou Benin

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