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Search Results: 1 - 10 of 325295 matches for " Edmond S. Miabangana "
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Floristic Composition, Diversity and Structure of the Rainforest in the Mayoko District, Republic of Congo  [PDF]
Margaretha W. van Rooyen, Noel van Rooyen, Edmond S. Miabangana, Gilbert Nsongola, Caroline Vasicek Gaugris, Jér?me Y. Gaugris
Open Journal of Forestry (OJF) , 2019, DOI: 10.4236/ojf.2019.91002
Abstract: Botanically, the Mayoko district is known only through anecdotal descriptions made in the colonial era. The present study was undertaken as part of the prerequisite for a mining feasibility study where a benchmark of the floristic composition, diversity and structure of the vegetation was needed to evaluate potential biodiversity offset areas and to guide species selection for post-mining re-vegetation. The study area comprised approximately 160,000 ha and 235 sample sites were surveyed using the Braun-Blanquet method of phytosociology. Diversity of each plant association was expressed in terms of various diversity parameters. Twelve associations were described and mapped. The associations ranged from highly disturbed and degraded to fairly intact forest associations. A wet to dry gradient and permanently inundated to temporary inundated gradient could also be distinguished. The approach followed here proved remarkably robust in illustrating the complexity in a topographically complex region of the Chaillu Massif. The data provided a high level of insight into the possible dynamics of the rainforest and indications as to possible successional pathways. This information provides a better level of understanding of forest structure and evolution potential than studies limited to trees, remote sensing carbon assessments, or time change series.
Population structure and reproductive parameters of the Longneck croaker, Pseudotolithus typus (Pisces, Bleeker, 1863) in nearshore waters of Benin (West Africa) and their implications for management  [PDF]
Edmond S ossoukpe, Francis Kofi Ewusie Nunoo, Hederick Roosevelt Dankwa
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.46A002
Abstract: Pseudotolithus typus is one of the two commercially important Sciaenids off Benin nearshore waters mainly fished by beach seining. Unfortunately, since 1994, the production of this species has been decreasing, and increasingly more small-sized fishes are regularly harvested, while little is known about the species’ population structure and its life history. Therefore, population structure, probability of capture and size at first capture were investigated using length-frequency data of 1144 specimens sampled from beach seine hauls over a period of 18 months. A total of 54.3% of this population was immature, confirming the domination of smallsized fishes in the catches. Gonad maturation stages were also examined. Frequency distribution of oocyte size exhibited two cohorts of mature oocytes suggesting two spawning periods per year. Monthly averages of gonado-somatic index confirmed that P. typus spawned twice a year during the major warm season (March - May) and during the transition minor warm to minor cold season in October - November. Length at first capture (L75 = 22.76 cm) was smaller than the length at first sexual maturation (L50% = 23.6 cm) indicating a heavy pressure of the beach seine on this resource. To give each fish the chance of reproducing at least once in its lifetime to recruit into the stock, necessary measures such as the size-limit regulation by gradually increasing beach seine mesh size should be developed. Community-based management of the nearshore fishery could contribute to reducing
Kondo screening by the surface modes of a strong topological insulator
Edmond Orignac,Sébastien Burdin
Physics , 2013, DOI: 10.1103/PhysRevB.88.035411
Abstract: We consider a magnetic impurity deposited on the surface of a strong topological insulator and interacting with the surface modes by a Kondo exchange interaction. Taking into account the warping of the Fermi line of the surface modes, we derive a mapping to an effective one dimensional model and show that the impurity is fully screened by the surface electrons except when the Fermi level lies exactly at the Dirac point. Using an Abrikosov fermion mean-field theory, we calculate the shape of the electronic density Friedel oscillation resulting from the presence of the Kondo screening cloud. We analyze quantitatively the observability of a six-fold symmetry in the Friedel oscillations for two prototype compounds: Bi$_2$Se$_3$ and Bi$_2$Te$_3$.
Long-run availability of a priority system: a numerical approach
Edmond J. Vanderperre,Stanislav S. Makhanov
Mathematical Problems in Engineering , 2005, DOI: 10.1155/mpe.2005.75
Abstract: We consider a two-unit cold standby system attended by two repairmen and subjected to a priority rule. In order to describe the random behavior of the twin system, we employ a stochastic process endowed with state probability functions satisfying coupled Hokstad-type differential equations. An explicit evaluation of the exact solution is in general quite intricate. Therefore, we propose a numerical solution of the equations. Finally, particular but important repair time distributions are involved to analyze the long-run availability of the T-system. Numerical results are illustrated by adequate computer-plotted graphs.
What are the beliefs of pediatricians and dietitians regarding complementary food introduction to prevent allergy?
Sara Leo, John Dean, Edmond S Chan
Allergy, Asthma & Clinical Immunology , 2012, DOI: 10.1186/1710-1492-8-3
Abstract: Identify the recommendations that general pediatricians and registered dietitians provide to parents and delineate any differences in counselling.A 9-item survey was distributed to pediatricians and dietitians online and by mail. Information on practitioner type, gender, length of practice and specific recommendations regarding complementary food introduction and exposure was collected.181 surveys were returned with a 54% response rate from pediatricians. It was not possible to calculate a meaningful dietitian response rate due to overlapping email databases. 52.5% of all respondents were pediatricians and 45.9% were dietitians. The majority of pediatricians and dietitians advise mothers that peanut abstinence during pregnancy and lactation is unnecessary. Dietitians were more likely to counsel mothers to breastfeed their infants to prevent development of atopic dermatitis than pediatricians. Hydrolyzed formulas for infants at risk of developing allergy were the top choice of formula amongst both practitioners. For food allergy prevention, pediatricians were more likely to recommend delayed introduction of peanut and egg, while most dietitians recommended no delay in allergenic food introduction.In the prophylaxis of food allergy, pediatricians are less aware than dietitians of the current recommendation that there is no benefit in delaying allergenic food introduction beyond 4 to 6 months. More dietitians than pediatricians believe that breastfeeding decreases the risk of atopic dermatitis. Practitioners may benefit from increased awareness of current guidelines.Food allergy is a hypersensitivity reaction to food allergens initiated by the immune system [1,2]. IgE-mediated food allergy (type I), forms the bulk of food-induced allergic responses and results in elevated allergen-specific serum IgE antibodies. It is not clear how the gut mucosal immune system is oriented toward sensitization versus immune tolerance when exposed to dietary antigens [3]. Food allergy is
Long-run availability of a priority system: a numerical approach
Vanderperre Edmond J.,Makhanov Stanislav S.
Mathematical Problems in Engineering , 2005,
Abstract: We consider a two-unit cold standby system attended by two repairmen and subjected to a priority rule. In order to describe the random behavior of the twin system, we employ a stochastic process endowed with state probability functions satisfying coupled Hokstad-type differential equations. An explicit evaluation of the exact solution is in general quite intricate. Therefore, we propose a numerical solution of the equations. Finally, particular but important repair time distributions are involved to analyze the long-run availability of the T -system. Numerical results are illustrated by adequate computer-plotted graphs.
Toxicity Profile of Karuho Poison on the Brain of Wistar Albino Rats  [PDF]
Samuel Kule Kyolo, Godfrey S. Bbosa, John Odda, Aloysius M. Lubega, Ntabe Namegabe Edmond
Neuroscience & Medicine (NM) , 2018, DOI: 10.4236/nm.2018.92008
Abstract: Various forms of Karuho poisoning are a common traditional mystery and a public health challenge in Goma city, North Kivu in DRC practiced by unscrupulous people. Its signs and symptoms are commonly mistaken by local communities and medical world with those of tuberculosis, HIV/AIDS and typhoid fever; with neurological and psychological symptoms. Study investigated sub-acute toxicity of Karuho poison on brain of Wistar albino rats. Laboratory based experimental study was conducted at Department of Pharmacology & Therapeutics, Makerere University College of Health Sciences. A total of 4 Karuho poisons (OMGKRP, DLNKRP, CHKRP and BHKRP) were screened for acute and sub-acute toxicity. Fifty animals, 10 in each group were daily dosed for 28 days with 1 mg, 5 mg, 20 mg and 5000 mg/kg bwt of OMGKRP (most active following screening) and normal saline for control group using OECD 407 and NIH 2011 guidelines. Behavioral changes were noted. Histopathological changes in brain regions were analyzed. Treated rats by OMGKRP, most active Karuho poison, were associated with sign of depression, piloerection and shortness of breath. Histopathological changes revealed moderate diffuse congestion and mononuclear inflammatory cells infiltration (plasma cells, lymphocytes and macrophage) in cerebral region with severe inflammation observed in meninges of cerebellum. OMGKRP poison induced inflammation of meninges of cerebellar region of brain.
Teachers’ Attitudes and Perceptions: Association of Teachers’ Attitudes toward Traditional and Modern Teaching Methodology According to RWCT as Well as Teachers’ Perceptions for Teaching as a Profession  [PDF]
Xhevahire Karanezi, Edmond Rapti
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.66061
Abstract: Teaching methodologies that are chosen to be used by teachers in their daily work are highly impacted by their attitudes and perceptions. According to Schoenfeld (1992) attitudes and perceptions influence teachers not only how, but what, he or she teaches. The data collection for this study was conducted using quantitative and qualitative method. There were 473 school teachers throughout Kosovo that participated in this study. Questionnaires were used to collect all quantitative data, which were compiled and adjusted in accordance with the study objectives. Focus groups discussions were conducted for the purpose of collecting the qualitative data. The data showed significant negative association between teachers’ attitudes toward traditional teaching methodologies and modern teaching methodologies according to RWCT (r = 0.446, sig = 0.000). The data also showed that there was a significant negative association between attitudes toward traditional teaching methodology and teachers’ perceptions for teaching as a profession (r = 0.092, sig = 0.046). The quantitative results were in the same line with the qualitative findings of the study.
Molecular Cytogenetics: An Indispensable Tool for Cancer Diagnosis
Thomas S. K. Wan,Edmond S. K. Ma
Chang Gung Medical Journal , 2012,
Abstract: Cytogenetic aberrations may escape detection or recognition in traditional karyotyping. The past decade has seen anexplosion of methodological advances in molecular cytogenetics technology. These cytogenetics techniques add color to theblack and white world of conventional banding. Fluorescencein-situ hybridization (FISH) study has emerged as an indispensable tool for both basic and clinical research, as well asdiagnostics, in leukemia and cancers. FISH can be used toident i fy chromosoma l abnorma l i t i e s through f luor e s c entlabeled DNA probes that target specific DNA sequences.Subsequently, FISH-based tests such as multicolor karyotyping, comparative genomic hybridization (CGH) and arrayCGH have been used in emerging clinical applications as theyenable resolution of complex karyotypic aberrations and wholeglobal scanning of genomic imbalances. More recently, crossspecies array CGH analysis has also been employed in cancer gene identification. The clinical impact of FISH is pivotal, especially in the diagnosis, prognosis and treatment decisionsfor hematological diseases, all of which facilitate the practice of personalized medicine.This review summarizes the methodology and current utilization of these FISH techniquesin unraveling chromosomal changes and highlights how the field is moving away from conventional methods towards molecular cytogenetics approaches. In addition, the potential ofthe more recently developed FISH tests in contributing information to genetic abnormalitiesis illustrated.
Strategic Team AI Path Plans: Probabilistic Pathfinding
Tng C. H. John,Edmond C. Prakash,Narendra S. Chaudhari
International Journal of Computer Games Technology , 2008, DOI: 10.1155/2008/834616
Abstract: This paper proposes a novel method to generate strategic team AI pathfinding plans for computer games and simulations using probabilistic pathfinding. This method is inspired by genetic algorithms (Russell and Norvig, 2002), in that, a fitness function is used to test the quality of the path plans. The method generates high-quality path plans by eliminating the low-quality ones. The path plans are generated by probabilistic pathfinding, and the elimination is done by a fitness test of the path plans. This path plan generation method has the ability to generate variation or different high-quality paths, which is desired for games to increase replay values. This work is an extension of our earlier work on team AI: probabilistic pathfinding (John et al., 2006). We explore ways to combine probabilistic pathfinding and genetic algorithm to create a new method to generate strategic team AI pathfinding plans.
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