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Search Results: 1 - 10 of 26 matches for " Mulumba Badibanga "
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Suitable Hybrids and Synthetics Provitamin A Maize Selected for Release in the Democratic Republic of Congo  [PDF]
Kabongo Tshiabukole, Pongi Khonde, Mbuya Kankolongo, Tshimbombo Jadika, Kaboko Kasongo, Mulumba Badibanga, Tshibanda Kasongo, Kizungu Vumilia
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103446
Abstract:
Six new provitamin A hybrids (LY1001-14, LY1001-22 and LY1001-23,) and synthetic maize varieties (PVASYN13, PVASYN9 and PVASYN7) were tested for their agronomic performance and compared to a locally adapted improved open pollinated variety (SAMARU) in the central and western conditions of DRC. A randomized complete block experiment with four replications was used. Following data were collected: 50% male and female flowering, plant and ear aspect, diseases incidence, plant height, ear aspect, ear rot and yield. The results showed non-significant differences (p > 0.05) in disease incidence and ears rot. Significant differences were observed (p < 0.05) for number of days to 50% of male and female flowering, anthesis-silking interval, plant height, plant aspect, ear aspect, and yield. For yield, two hybrids (LY100-14 and LY1001-22) respectively out-yielded local check by 71% and 56% while one synthetic (PVASYN 9) out-yielded the local check by 31% and the two others were comparable to the local check. Thus the hybrids (LY100-14 and LY1001-22) and synthetic varieties (PVASYN 9 and PVASYN13) are ready to be recommended for release to contribute to better production and nutrition for vulnerable people.
Infraspecific Delimitation of Acacia senegal (Fabaceae) in Uganda  [PDF]
John Wasswa Mulumba, Esezah Kakudidi
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.23039
Abstract: The wide variation in Acacia senegal has presented taxonomic uncertainties and unresolved contradictions in previous studies. In this study numerical taxonomic principles and multivariate analysis (UPGMA PCoA and PCA) were used basing on 69 characters derived from growth form, branchlets, leaves, flowers, pods and seed. Three taxa, namely; variety senegal, leiorhachis and kerensis have been discerned and described significantly improving the delimitations of previous studies. The wide variation within var. senegal has been split into three recognizable variants and that of var. leiorhachis into two. The most important characters for differentiating the taxa include leaf breadth and length, pinna length and its ratio to pinna breadth, number of leaflet pairs, petiolar gland shape, petiolar and rachis gland size, stem and branch bark texture, stem and branchlet colour, under-bark colour for stem and branches, pod apical shape, growth form, crown shape, and prickly state of leaves. An identification key has been constructed which, for the first time, can be used to assign herbarium specimens to their respective taxa.
Self-Adaptive DE Applied to Controller Design  [PDF]
K. A. Folly, T. Mulumba
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.29007
Abstract:

Adequate damping is necessary to maintain the security and the reliability of power systems. The most-cost effective way to enhance the small-signal of a power system is to use power system controllers known as power system stabilizers (PSSs). In general, the parameters of these controllers are tuned using conventional control techniques such as root locus, phase compensation techniques, etc. However, with these methods, it is difficult to ensure adequate stability of the system over a wide range of operating conditions. Recently, there have been some attempts by researchers to use Evolutionary Algorithms (EAs) such as Genetic Algorithms (GAs), Particle Swarm Optimization, Differential Evolution (DE), etc., to optimally tune the parameters of the PSSs over a wide range of operating conditions. In this paper, a self-adaptive Differential Evolution (DE) is used to design a power system stabilizer for small-signal stability enhancement of a power system. By using self-adaptive DE, the control parameters of DE such as the mutation scale factor F and cross-over rate CR are made adaptive as the population evolves. Simulation results are presented to show the effectiveness of the proposed approach.

Environmental Impacts (ER CO2) of an Improved Multi-Fuel Gasifier Forced Air Cookstove in the City of Kinshasa  [PDF]
Oscar Mulumba Ilunga, Hurtado Pérez Elías José
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.96039
Abstract: Sub-Saharan African countries depend 80% on the biomass-wood to meet their daily needs in terms of cooking foods. Traditional cookstoves are much more used to this effect. Many change programmes for replacing cookstove model have been planned. Yet many of these programmes have not been preceded by environmental impact studies. This work offers high-performance cookstove models and determines their impact on the reduction of CO2 emissions, a very harmful greenhouse gas causing the planet warming and climate change. Replacing the traditional cookstove by an improved stove may lead to an economy in terms of fuel ranging from 33.2% to 75.4% according to the model of cookstoves. Yet the Gasifier using pellets as fuel remains the most beneficial stove in terms of fuel saving (75.4%) and in terms of ER CO2, i.e. 2748 t CO2/Year. An improved gasifier cookstove is multi-fuel. He can use charcoal, pellets and wood. This is an indispensable cooking tool with alternative fuels. In this work, the ER CO2 was evaluated using two methods. The KPT, which is a field method and the CCT which is a laboratory method. By the KPT method a gasifier ICS/GAS/P records up to an ERCO2 of 2748 t CO2/Year, while with the same gasifier, an ERCO2 of 2619 t CO2/year is found by the CCT method. The comparison between the two methods shows the same trend but with very high values of ERCO2 for the KPT method results. The variation between the two methods ranges between 1% approximately to 6.9 percent.
TUBULAR PHOTOBIOREACTOR FOR MICROALGAE BIODIESEL PRODUCTION
Nkongolo Mulumba,Ihab H. Farag
International Journal of Engineering Science and Technology , 2012,
Abstract: Biodiesel production from algae is a promising technique. Microalgae have the potential to produce 5,000-15,000 gallons of biodiesel/(acre-year). However, there are challenges; these include high yieldof algae biomass with high lipid content and the effective technique to harvest the grown algae, extract the algal oil and transesterify the oil to biodiesel. In this project Tubular PhotoBioReactor (TPBR) was designed and achieved a ten times increase in algae concentration. It produced 1g of dry algal biomass per liter of medium within 12 days, with a lipid content of 12% approximately. Healthy algal culture grew well in the TPBR reaching 56x106 cells/mL of culture medium. The 10 fold increase is higher than those reported for open ponds and helical photobioreactor.
Genetic Diversity and Structure of Acacia senegal (L.) Willd. in Uganda
John W. Mulumba,Silvester Nyakaana,Ramni Jamnadass
International Journal of Botany , 2012,
Abstract: The study assessed the genetic variation and population structure of Acacia senegal in Uganda. Based on 129 mature individuals, representing eight populations, the genetic variation and population structure of Acacia senegal in Uganda was analysed at four microsatellite loci. All four loci were highly variable, with the number of alleles per locus ranging from 8-14 (mean = 10.5). Substantial levels of genetic diversity were found (mean expected heterozygosity, He = 0.479, range 0.245-0.846; Information Index, I = 0.927, range 0.646-1.206). Analysis of molecular variance demonstrated moderate genetic differentiation among populations [Fst = 0.100, p≤ 0.001], comparable to similar tropical species. Isolation by distance, based on Mantel Test showed a positive and significant correlation [Rxy = 0.197, p≤0.001]. Based on population assignment, pair-wise population comparisons and PCA, four populations emerged; one on the eastern and the other on the western side of lake Kyoga, suggesting isolation due to a water body barrier; two other populations emerged in Karamoja. The observed southern-northern flowering pattern across the species distribution range appears central to the species differentiation. The four populations, therefore, form the target for conservation and sustainable utilization of the species genetic variability in Uganda.
HIV Infection in Fishing Communities of Lake Victoria Basin of Uganda – A Cross-Sectional Sero-Behavioral Survey
Alex Opio, Michael Muyonga, Noordin Mulumba
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0070770
Abstract: Background Uganda's first AIDS case was reported in a fishing village. Thereafter, due to varying risk factors, the epidemic spread heterogeneously to all regions, with some populations more affected. Given the recent rising trends in HIV infection in Uganda, it is crucial to know the risk factors in different populations. The aim of this study was to determine the prevalence and risk factors of HIV infection among fishing communities. Methodology A cross-sectional survey of 46 fishing communities was conducted in 2010. Following written consent, 911 randomly selected respondents age 15–59 years were interviewed and gave blood for HIV testing. HIV testing was conducted in the field and central laboratory according to national algorithm. Survey protocol was approved by the Science and Ethics Committee of Uganda Virus Research Institute, and cleared by Uganda National Council for Science and Technology. Data was captured by EPIINFO and statistical analysis done in SPSS. Findings Overall HIV prevalence was 22%; there was no difference by sex (x2 test, p>0.05). Association with HIV infection was determined by x2 test, p<0.5. Never married respondents had lower HIV prevalence (6.2%) than the ever married (24.1%). HIV prevalence was lower in younger respondents, age 15–24 years (10.8%) than in age group 25 years and above (26.1%). Muslims had lower HIV prevalence (14.4%) than Christians (25.2%). HIV prevalence was higher among respondents reporting 3 or more lifetime sexual partners (25.3%) than in those reporting less numbers (10.8%). HIV prevalence was higher among uncircumcised men (27%) than in circumcised men (11%). Multivariate analysis identified 4 risk factors for HIV infection; age, religion, ever condom use and number of lifetime sexual partners. Conclusions HIV prevalence in the surveyed communities was three times higher than of general population. This underscores the need for tailor made HIV combination prevention interventions targeting fishing communities.
Data mining and networks neuronal: Extracting knowledge from high pressure data patients
Mbuyi Mukendi Eugandegrave;ne,Kafunda Katalayi Pierre,Mbuyi Badibanga Steve,Mbuyi Mukendi Didier
International Journal of Computer Science Issues , 2012,
Abstract: Data mining is a set of methods and techniques for exploring and analyzing automatically or semi-automatically databases in order to detect rules, associations, unknown or hidden trends, specific structures that restore most of the useful information while reducing the amount of data.This is a process of extracting valid and tractable knowledge from large amount of data.In this paper, we present a contribution on the extraction of useful knowledge from databases on patients with high blood pressure from one of the hospital in Kinshasa (RD Congo), using multi-layerneural networks.
Building capacity for improved veterinary epidemiosurveillance in southern Africa : report
C. Bamhare,G. Thomson,A. Latif,M. Mulumba
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v78i2.297
Abstract: A workshop to produce recommendations on training requirements for improved epidemiosurveillance of livestock diseases in southern Africa was organised at the Department of Veterinary Tropical Diseases in the Veterinary Faculty of the University of Pretoria. It was attended by 23 persons representing 10 different southern African countries. The majority of the participants were actively involved in veterinary epidemiosurveillance and many of them were members of the SADC Epidemiology and Informatics Subcommittee. Discussions focused on (i) epidemiosurveillance networks and their 2 main components, i.e. (ii) diagnosis and (iii) information flow. The debates were guided by 3 questions; (i) what are the requirements for an effective network, (ii) what cannot be achieved with existing capacity and (iii) how can the current capacity be improved.Workshop participants developed lists of realistic capacity building needs, which were divided into structural needs and training requirements. Structural needs mainly concerned communication means and quality assurance. With regard to training, the need for appropriate continuing education of all actors at the various disease management levels (non-professional, para-professional, professional) was expressed. Special emphasis was put on capacity building at the lowest level, i.e. the livestock owner and the para-professionals at the community level. At the international level, it was felt that special emphasis should be put on building capacity to improve the understanding of international agreements on trade in animals and animal products and to improve the capacity of negotiating such agreements.
The Effect of Partial Removable Denture Use on Oral Health Related Quality of Life and Masticatory Function, after 5 Years Use  [PDF]
Mantshumba Milolo Augustin, Duyck Joke, Sekele Isouradi Bourleyi, Lutula Pene Shenda, Nyimi Bushabu Fidele, Tshombe Mulamba Van, Ntumba Mulumba Kanda, Ignace Naert
Open Journal of Stomatology (OJST) , 2016, DOI: 10.4236/ojst.2016.610026
Abstract: The aim of this study was to evaluate whether partial removable denture use indeed leads to improved oral health related quality of life and masticatory function. Materials and Methods: Partially edentulous patients presenting for removable denture treatment at the Prosthodontics Service in the Hospital Affiliated to Kinshasa University (Democratic Republic of Congo) were assessed for enrolment in this study. After applying exclusion criteria, 378 patients were included in the study, and randomly assigned into 2 groups. Oral health related quality of life (OHIP-23) and mastication time (MaT), number of chewing cycles (MaC), mastication frequency (MaF), and the sizes of the peanut fragments (FraS) were compared in both groups. Statistical significance was set at p < 0.05. Results: The average MaC, MaT, MaF, and FraS were 119 (± SD 53.70), 86.75 (±SD 35.35), 1.38 (±SD 0.25), and 3.3 (±SD 3.25) for the denture group and 77.9 (±SD 23.9), 60.2 (±SD 17.91), 1.29 (±SD 0.15), and 1.5 (±SD 0.7) for the non-denture group, respectively. Conclusion: The overall oral health related quality of life was best in the non-denture than denture.
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