MAKUMBELO EL’SHIE Crispin1,2*, LUKOKI LUYEYE Felicien2, BELESI KATULA Honore2, LUNGIAMBUDILA MAMONA Oscar2

LIFOSA-17 model: analysis tool of forest dynamic

The study of the dynamics of an ecological system is best done with a model. The difficulties experienced in the application of existing models, in our context, push to propose another simpler and more appropriate. The LIFOSA-17 model is based on the habitats of the forest- savannah edge (LIFOSA) of Central Africa: forest, ecotone close to the forest, ecotone close to the savannah and savannah and on the natural regeneration processes of the forest in the herbaceous formation: conquest, presence of pre-existing ones, growth of young plants and human action It makes it possible to represent, understand and predict the future of this eco- complex system. By mastering the processes of the dynamics of ecological systems, it describes the evolution of degraded habitats towards the more complex ones and reveals the engines of natural forest regeneration by identifying the forces that apply to them. It was designed from the synthesis of existing knowledge in a systemic-analytical study of forest dynamics. The objective of this study is to provide research with a model of analysis and interpretation, in a very short time, of the processes of the dynamics of ecological systems in the tropical region. Téléchargé l'article

BALENGA LUBOYA Annick*, N’SINABAU EYAY Raïs, MAGOGA KUMBUNDU Mago, NDONGOSI MUNTU Fiston, KOMPANY MUKUNA Pepito.

Infant Mortality in Pediatric Emergencies at the General Reference Hospital of N’djili/ISTM, Kinshasa.

The DR Congo is one of the countries with limited resources where infant mortality remains very high, due to the structural and functional weakness of its health system. The objective of our study was to describe the epidemiological and clinical profile of children who died in the pediatric emergency department of the N’djili General Reference Hospital in Kinshasa. It concerns a descriptive retrospective study covering 103 child deaths and ranging from January 1 to December 31, 2019. Among the 771 files collected, one hundred and three (103) concerned those of deceased children, for an overall mortality of 13, 4%. Children under 5 years of age accounted for the majority of patients (69%). The average consultation time was around 4 days. Fever was the main reason for consultation (92%), severe malaria (41%), acute infantile bronchiolitis (17%), diarrhea included in the diagnosis of acute febrile gastroenteritis (AGEF) (15%) and meningitis (14%) were the most diagnosed pathologies. The highest peak of deaths was observed during the month of December. Pediatric mortality at N’djili General ReferralHospital is high. Téléchargé l'article

NDONGOSI MUNTU Fiston*, N’SINABAU EYAY Raïs, NSANGONDAMU NZELA Gospel, MBAA MAZEYI Glody, MAGOGA KUMBUNDU Mago

Epidemiological and clinical profile of pediatric emergencies at the general reference hospital of N’djili / ISTM-Kinshasa, R.D. Congo.

Pediatric emergencies are frequent in our environment and infant mortality is still a major public health problem. The objective of our study was to determine the epidemiological and clinical profile of patients admitted to pediatric emergencies at the N’djili General Reference Hospital / ISTM-Kinshasa. This is a descriptive cross-sectional study that was carried out from September 1 to December 31, 2019 on 331 patients admitted to the General Reference Hospital of N’djili / ISTM (Higher Institute of Medical Techniques)-Kinshasa. Fifty-two percent of the patients were male (Sex ratio 1.1). Children under 5 years of age represented the majority of patients (83.4%). Fever was the main reason for consultation (81% of cases), 58% of patients were referred. Severe malaria (41%), acute febrile gastroenteritis (32.3%) and neonatal infection (14%) were the most common pathologies. Twenty-two percent of the patients received a blood transfusion, the consultation time after 24 hours was 93.4% and the overall mortality was 14.8%. Severe malaria, acute febrile gastroenteritis and neonatal infection were the main causes of admission to Pediatric Emergencies at the N’djili General Reference Hospital / ISTM-Kinshasa. The overall mortality rate was high there. Téléchargé l'article

KANDU-LELO ASSEKUKA Clement1*, MASUMU MULUMBU Justin2, TSHILENGE CURE Georges1, LUFIALUSU NZOTUFWIDI Chancard1, MUNGONGO MAYAMA Paulin1,

Goat breeding in Lwiro/South Kivu in the Democratic Republic of Congo: Technical, health, socio-economic aspects for improvement

A technical and socio-economic analysis, followed by prospects for improvement of goat farming in Lwiro, South Kivu Province, Democratic Republic of Congo, was carried out using semi- structured surveys from November 2018 to July 2019, in 41 farms in nine villages. These farms are largely held by women aged 28 to 50, belonging to the Shi ethnic group. The goats concerned are products of local breed weighing between 20 and 25kg and raised in a traditional way (no veterinary intervention, no dietary supplements). Medicinal plants are generally used for health care. The sale of these animals takes place in the village and/or at the market at any time of the year and according to domestic needs. It is realized with intermediary traders at an average price of 40 to 60 US $ after negotiation. This form of sales is satisfactory for women because they do not spend much in this activity where the animals are fed with grass found for free in the wild. Currently, the profitability of this breeding is low. However, the possibilities of improvement exist. Well-structured research will need to be conducted regularly to determine the correct farming system, to determine the objectives and needs of herders, to study possible solutions to encourage the grouping of breeders into associations of small ruminants’ breeders and to make the appropriate genetic choice for the system.Téléchargé l'articlle

SHIMA NGOY Thierry*, MONSENGO N’SOLE Roger, KONGOTA ISASI Elvis, MISAMU NDANDU

Physicochemical, Bacteriological and Hydrochemical Facies Characterization of Some Landscaped Water Sources in Lukula Health Zone, Central Kongo Province

In the Democratic Republic of Congo (DRC), the vast majority of the Congolese population depends on groundwater and spring to obtain drinking water, the composition and safety of which are unknown. Consequently, the risks of poisoning could be frequent and serious. Given the absence of data on the composition and safety of this category of water, a study was conducted between April and December 2018 to determine the physico-chemical, bacteriological and hydrochemical quality of certain sources of water managed in the health zone of Lukula, in the province of Kongo-central. The results obtained provided a first description of the composition and the state of pollution of the water at the sites studied. The analysis were carried out according to standard methods. The results obtained show that these waters are generally soft and that the physico-chemical parameters are clearly below the thresholds of the standards of the World Health Organization. Furthermore, these waters do not present significant organic and bacteriological pollution. Thus these spring waters are of good quality and suitable for consumption. Téléchargé l'article


 

KAYALA KINDENGE Teddy

An approach for calculating the spare parts ordering point in the case of a non-essentially constant damage rate: Application to N’djili collection pumps

This article presents an approach for calculating the spare parts order point in the case of a variable failure rate using the more general Weibull type reliability law than that for constant Poisson rates. The context concerned is the case of an industrial park whose definition of spare parts to be kept in stock is made, the supply periods already set with the suppliers and the operational reliability data also indicated. The different types of maintenance are considered, a probabilistic expression of the risk of out of stock is established for this approach in the case of residual or complementary corrective maintenance and is used for the verification of the variable failure rate model to the particular case of the Poisson model. An application to the pumps of the N’djili station is done and shows the influence of shape and scale parameters on the alert threshold and on the shape of the temporal evolution curve of spare parts stock. Téléchargé l'article

LUNGIAMBUDILA MAMONA Oscar1*, NSIMBA KIBANGUDI Jonathan1, NZONGO LUBINGU Pascal2

Note on canonical screen distribution of lightlike hypersurface of R𝒎+𝟐𝒒 

In this paper, we present the construction of canonical screen distribution for lightlike hypersurface (lightlike cone) of semi-euclidean space according to Bejancu and Duggal approach. We prove that the canonical screen distribution for the lightlike cone of semi-euclidean space R𝑚+2 is integrable (Theorem 4.1), totally conformal (Theorem 4.3) and totally umbilical 𝑞 (Theorem 4.4). So we deduce some induced geometrical objects and properties of this lightlike cone.Téléchargé l'article