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Le dépôt numérique grenier du savoir du Burundi est une collection de documents scientifiques produits par les chercheurs de l'Université du Burundi, y compris des mémoires, des thèses, des revues, des articles, des rapports techniques, etc. Il s'agit du dépôt institutionnel officiel de l'Université du Burundi

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Grenier du Savoir du Burundi

Recent Submissions

Hausses soudaines du lac Tanganyika : observations et connaissances locales au nord du lac (Burundi)
(UB, FS, 2026-03)
Inarukundo, Divine-Claudine
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Sous la direction de : Professeur Claver Sibomana
Lake Tanganyika, one of the oldest and deepest lakes in the world, constitutes a major ecosystem for the riparian populations of Burundi. In recent years, episodes of sudden water level rises have been observed along its northern shores, causing significant ecological and socio-economic impacts. It is with this objective that this study was conducted to explore the knowledge of the local population regarding these phenomena. A survey was carried out in six lakeside localities north of Lake Tanganyika, on the Burundian side (Gatumba, Kajaga, Nyabugete, Kiringi, Nyamugari, and Gitaza). Sixty (60) people living or working near the lake for at least 10 years were surveyed. A mixed-method approach combining a socio-economic survey and analysis of meteorological data for certain parameters from the port of Bujumbura, available for different periods (2020–2025 for some, 2015–2024 for others), was used. According to respondents, the sudden rise of the lake occurs mainly between March and May (cited by 55%) or between October and May (cited by 45%), with the most notable episodes in 2021, 2023, and especially 2024. The perceived causes of these sudden rises are primarily lake squalls, violent winds, waves, and intense rainfall. Identified warning signs include thunder over the lake, black clouds over the lake, strong winds known as ihumba or kasikasi, waves locally called urubangwe, ingunza, igitembagara, unusual animal behavior, and high turbidity of the lake water (isuri). Documented impacts include major consequences such as flooding, temporary population displacement, crop loss, increased fish mortality, phytoplankton blooms (umukombe), and fish abundance. Meteorological data analysis shows a sudden rise in the lake level in 2015, 2020, 2021, and 2022, which can be explained by the heavy rainfall that characterized those years. The local population's adaptation strategies to the sudden lake rise are essentially: temporary relocation, mooring boats on rafts, construction of dikes, erection of physical barriers around houses, planting of reeds, respecting the former lake boundaries, and avoiding construction in flood-prone areas.
Apport des émissions de la radio Buntu sur l’entrepreneuriat des jeunes dans la région de Ngozi (2018-2022)
(UB, Ecole doctorale, 2025-06)
Nsengiyumva, Jean Paul
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Sous la direction du : Professeur Clément Bigirimana
This thesis examines the contribution of Radio Buntu programmes to youth entrepreneurship in Ngozi Province, Burundi, over the period 2018-2022. It aims to determine how these programmes contribute to young people’s access to information and training, changes in their entrepreneurial attitudes and behaviours, and transformations in the ways they think and act within their communities. The research adopts a mixed-methods approach with a sequential exploratory design (Creswell, 2015), drawing on three sources of data: a questionnaire administered to 400 young entrepreneurs, semi-structured interviews with 18 Radio Buntu staff members, and testimonies collected from 22 regular listeners of the station. The analysis is based on five theoretical frameworks: agenda-setting theory (McCombs & Shaw, 1972), solutions journalism (Bornstein, 2021; Weber, 2019), cultivation theory (Gerbner, 1969), empowerment theory (Freire, 1970; Zimmerman, 1995), and social change theory (Iñigo Retolaza, 2011). The results show that 95.89% of the young respondents listen to Radio Buntu programmes, with 82.19% doing so regularly and consistently. Furthermore, 83.33% use the programmes to obtain information for their entrepreneurial activities, 75.76% report being motivated to save, and 92% indicate that they have acquired new areas of innovation. Nine documented entrepreneurial trajectories confirm the causal chain information → motivation → action → outcome. The establishment of Radio Listening Groups (GER) in 2021 also transformed individual listening into spaces for economic mobilisation, mutual support and partnerships among young entrepreneurs, while encouraging their active participation in the station’s programmes. The analysis of the findings through the five theoretical frameworks shows that Radio Buntu programmes serve simultaneously as a channel for information and training in entrepreneurship, a catalyst for changes in individual attitudes and behaviours, and a driver of collective transformation. These results confirm the research hypotheses, fill a gap in Burundian and African literature on community media and youth entrepreneurship, and open avenues for interprovincial comparative and longitudinal research.
La cour constitutionnelle du Burundi, un législateur-cadre positif
(UB, FSPJ, 2026-02)
KWIZERA, Melchiade (Abbé )
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Sous la direction de : Dr. Pacifique Niyonizigiye
This thesis examines the role of the Constitutional Court of Burundi as a “positive framework legislator” within the national constitutional order. Traditionally conceived, following Hans Kelsen’s theory, as a “negative legislator” limited to annulling unconstitutional laws, constitutional courts have progressively developed a more active normative function. They increasingly influence the legislative process through interpretative techniques, injunctions, gap-filling decisions, and the modulation of the effects of their rulings. Adopting the European (Kelsenian) model of constitutional review since the establishment of its Constitutional Court in 1992, and currently governed by the Constitution of 7 June 2018 and the Organic Law of 30 December 2024, Burundi provides a relevant context to analyze this evolution. Using doctrinal, exegetical, jurisprudential, empirical, and comparative methods, this study assesses whether and how the Constitutional Court of Burundi exercises a positive normative function. The findings demonstrate that the Court does not merely invalidate unconstitutional norms but actively frames and guides future legislative action. Through interpretative reservations, binding injunctions, and the control of legislative omissions, it structures the normative environment in which the legislature operates. However, this expanded role raises significant questions regarding democratic legitimacy, separation of powers, and legal certainty. The thesis concludes that the Constitutional Court of Burundi plays a central role in consolidating the rule of law. While its function as a positive framework legislator strengthens constitutional supremacy and the protection of fundamental rights, it requires balanced institutional safeguards to preserve democratic legitimacy and institutional balance.
Facteurs nutritionnels associes a la cicatrisation cutanée postopératoire normale chez les adultes de 18 à 60 ans hospitalises dans le département de chirurgie de l’hôpital militaire de Kamenge, Burundi, 2025-2026
(UB, EANSI, 2026-06)
Ndayikengurukiye, Josiane
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Sous la direction de : Prof. Dr. Paul Bizimana, MD, PhD
Introduction: Postoperative wound healing represents a major clinical challenge in surgical departments, particularly in the context of resource-limited countries where hospital undernutrition is common. In Burundi, data on factors associated with wound healing after surgery remain insufficient, and perioperative nutritional protocols are not formalized. The objective of our study was to identify the factors associated with normal postoperative skin healing in patients aged 18 to 60 years hospitalized in the surgery department at the Kamenge Military Hospital. Methodology: This is an analytical prospective observational study carried out from November 1, 2025 to January 31, 2026 on 56 adult patients operated at the Kamenge Military Hospital (HMK), recruited by exhaustive sampling. Sociodemographic, socioeconomic, anthropometric, biological, surgical, dietary, and patient-related factors were collected using a structured sheet. The statistical analysis was performed with Stata version 15 software and included descriptive analysis, bivariate analysis by simple logistic regression, and multivariate analysis by multiple logistic regression with backward top-down selection, the performance of which was assessed by the ROC curve. Associations were estimated using the Odds Ratio (OR) and its 95% confidence interval. Variables with a value of p < 0.20 in bivariate analysis were included in the multivariate analysis, and those with p < 0.05 were considered to be significantly associated with normal postoperative skin healing. Results: Out of 56 patients, 66.07% had normal postoperative skin healing. Multivariate analysis identified four factors statistically associated with normal postoperative skin healing: serum albumin level (patients with hypoalbuminemia were 97% less likely to achieve normal postoperative skin healing with an OR = 0.03; 95% CI: [0.002–0.55]; p = 0.018) as well as those with inflammation (ORa = 0.03; 95% CI: [0.002–0.57]; p = 0.019), regular consumption of selenium source foods (OR a = 10; 95% CI: [1.76–59.3]; p = 0.010), young age (18–29 years: ORa = 36; 95% CI: [1.59–814]; p = 0.024) and major surgery (ORa = 0.01; 95% CI: [0.009–0.3]; p = 0.008). Conclusion: Our results confirm the need to integrate systematic nutritional screening and individualized perioperative nutritional prescription enriched with proteins and micronutrients essential for postoperative skin healing into surgical care protocols in Burundi.
Etude du hamiltonien matriciel d’ordre deux dépendants du potentiel elliptique de Jacobi partiellement algébrique
(UB, IPA & ENS, 2025-06)
Nihorimbere, Patrice
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Sous la direction de : Pr Ancilla Nininahazwe
The study of partially algebraic hamiltonian operators occupies a central place in quantum mechanics. The main objective is to determine the energiy spectrum of a quantum system. Our work focuses on the construction of partially algebraic hamiltonian operator and subsequently on the determination of the necessary and sufficient conditions for the secondorder matrix Hamiltonian dependent on the Jacobi elliptic potential to be partially algebraic. The first chapter covers the generalities and basic concepts of partially algebraic Hamiltonians. In the second chapter, using the analytical method of partial solvability, I highlighted the three necessary and sufficient conditions for the second-order matrix Hamiltonian dependent on the Jacobi elliptic potential to be partially algebraic for case 𝛿 = 1. In the third and final chapter, using the same method employed in the previous chapter, I proved that the Hamiltonian described above is partially algebraic, this time for case 𝛿 = 2.