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Search Results: 1 - 10 of 87676 matches for " Nwabueze I. Igu "
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Floristic Composition and Diversity of Freshwater Swamp Forests in the Niger Basin of Nigeria  [PDF]
Nwabueze I. Igu, Robert Marchant
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.84035
Abstract: Freshwater swamp forests are wetland ecosystems with poorly understood ecology. With increasing degradation across the Niger basin (where it is the most extensive across West Africa), it is deemed important to understand its distribution, patterns and composition. This is aimed at both increasing botanical inventories in the ecosystem and also elucidate vital steps that could guide its effective conservation. This study assessed the floristic composition and diversity across 16 one hectare forest plots and sought to show how varied the sites were in terms of diversity, stem density and basal area. The survey showed that the area had 116 species within 82 genera and 36 families. The number of species found in each of the disturbed sites was generally higher than the intact forest sites, which was not diverse but comprised many trees with higher basal area. While the stem density which ranged from 94 - 409 stems·ha-1 is comparable with that of other tropical forests, species richness was low (ranging from 8.65 - 0.52). Diversity ranged from 3.38 - 0.98 and was higher in disturbed sites than in intact locations. Species richness was generally low and implies that loss of species in the ecosystem could threaten species’ existence and conservation in the ecosystem. Disturbed locations had more species than the intact zones and as such show the importance of targeted conservation not only in the undisturbed locations but also in the disturbed locations with a higher species value and potential for species stability of the ecosystem.
Biodiversity and Carbon Potentials of a Nigerian Forest Reserve: Insights from the Niger Basin  [PDF]
Nwabueze I. Igu, Chukwudi P. Nzoiwu, Evaristus U. Anyaeze
Journal of Environmental Protection (JEP) , 2017, DOI: 10.4236/jep.2017.88057
Abstract: Forest reserves are expected to host a wide array of biodiversity and provide refuge for rare species that may be threatened in nearby forest landscapes. While this is the guiding protocol for most reserves across the tropics, such as Nigeria, the extent to which they host biodiversity and act as potential stores for carbon are quite uncertain. This study used a four hectare randomly selected forest plots to verify the biodiversity of the reserve, its stand structure and potentials for carbon storage. Species importance value was used to summarize the composition of the landscape. Both the diversity (mean diversity = 0.85) and species richness (eleven species) were low. Biodiversity in the area was quite poor and was mostly composed of Elaeis guineensis and Gmelina arborea, which had relative densities of 74.6% and 11.96%, respectively. Over exploitation and preference for fast-growing exotic species explained the poor stand structure and composition of the landscape, respectively. Very few tree stands were found in the mature structural class, and its capacity to facilitate regeneration and resilience seemed low. Its ability to store carbon in its biomass is equally low; since the forest landscape was much degraded. Maximizing the vast land of the reserve for targeted carbon storage (through mass tree planting) is a potential step that could forestall carbon sequestration across the region, especially because, such vast and available (forest) land cannot be guaranteed in most other forest landscapes.
Swamp Forest Use and Loss in the Niger Delta: Contextual and Underlying Issues  [PDF]
Nwabueze Ikenna Igu
Open Journal of Forestry (OJF) , 2017, DOI: 10.4236/ojf.2017.71003
Abstract: Forest ecosystems are vital not only for the ecosystem and biogeochemical processes, but also for the livelihood of forest dependent communities for which its continual existence is a necessity. This study explored the pattern of forest use in the hinterlands of the Niger Delta and sought to elucidate the drivers of forest loss and how the ownership and management of the forest plots influenced the changes in the forest ecosystem. Ecosystem services reduction and forest loss/degradation were found to be increasing over the years due to crude oil activities, urbanization/developments, population increase, agricultural activities and natural causes like flood. While each factor contributed to forest loss directly and indirectly, and varied from community to community, agricultural activities and population growth were responsible for most of the losses across the landscape. Even though agricultural activities were essential and thrived in the region, sustainable forest (land) uses could have reduced the associated implications of such land uses; but this was however hampered by the farming practises (shifting cultivation) across most of the communities. Lack of proper, effective and sustainable forest management structures, poor individual commitment and monitoring of forest activities were found to encourage forest loss at different spatial scales. Provision of alternative sources of livelihood and ensuring that suitable guidelines on forest abstraction and harvest are enforced across the region, are steps to promoting biodiversity conservation and resource management.
Analysis of Weather and Wet Road Crashes in Enugu Urban
I.C. Enete,I.N. Igu
Pakistan Journal of Social Sciences , 2012, DOI: 10.3923/pjssci.2011.289.293
Abstract: The problem of deaths and injuries as a result of traffic crashes has been acknowledged to be a global phenomenon. Wet weather contributes to several hazards within the transportation sector. The study focused only on vehicular types for example, cars, trucks, buses and motor cycles, etc. that plies on roads. The purpose of this study is to identify several potential interactions between specific rainfall characteristics and road crashes in Enugu urban. A range of statistical methods were employed in the analysis. The following statistical terms were adopted for the study and are defined in the text: Rain Crash Index (RCI), Wet Crash Rate (WCRi), Dry Crash Rate (DCRi), Rain Crash Effect (RCEi) and Rain Class Crash Rate (RCCRi). The research established some surprising results based on the analysis of WCRi and DCRi. About 29.8% of road crashes in Enugu occurred during wet months of 2009. It was surprising to observe that the highest wet crash occurred in the month of June (28 crashes) with only 10 wet days compared to the month of September with the highest wet days (22 days) and only 13 crashes. A negative rain crash effect during months of high rainfall may be the results of small dry spell, extra care of drivers during rainy days, low vehicle speed due to traffic congestion and runoff effect. It was also found that the effect of rainfall on road accident count depends on the length of time since the last rainfall (that is the impact of a dry spell). Large dry spell days recorded more accident counts. A shift from no dry spell to small dry spell days increased the average RCI by 26.4% while a shift from small to large dry spell increased the average RCI by 117.8%. Rainfall class and rain class crash rate showed that rainfall class of >30 mm reduced rain class crash rate more than rainfall class of between 0-1 mm (drizzling or light rainfall). Rainfall class (0-1 mm) had highest RCCRi (4.18) while rainfall class (>5-15) had lowest RCCRi (0.69). Some recommendations on areas for further research were made.
Characterization of Tuberculosis Cases Presenting in a Tertiary Healthcare Facility in South-Eastern Nigeria  [PDF]
E. D. Adinma, E. C. Azuike, S. A. Nwabueze, C. C. Nnebue, E. D. Azuike, D. C. Obi, I. C. Iloghalu, K. N. Okonkwo, M. C. Ohamaeme
Open Journal of Preventive Medicine (OJPM) , 2014, DOI: 10.4236/ojpm.2014.49082
Abstract: Background: Tuberculosis is second only to HIV/AIDS as the greatest killer worldwide, due to a single infectious agent. Directly Observed Treatment Short-Course (DOTS) is presently the WHO recommended programme to fight tuberculosis worldwide. There is need to understand the characteristics of patients who receive treatment for tuberculosis. This will help modify the strategies to fight the scourge of tuberculosis. Methods: This was a retrospective study conducted at the DOTS clinic at Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria. The records of patients who received treatment from the clinic from 1st January 2012 to 31st December 2012 were reviewed. Three hundred and fifteen patients were included in the study. Important characteristics of the patients were retrieved. Associations between patients’ characteristics were determined using relevant tests of significance. Results: Three hundred and fifteen patients were included in the study. There were more male patients (59%). The reproductive age group (37.5%) was more than the other age groups. Mean age was 33.1 (±18.5) years. There were more rural patients (50.2%) than urban patients (49.8%). There were more pulmonary TB patients (87.3%) than extrapulmonary TB patients (12.7%). There were more sputum AFB negative patients (45.4%) than positive patients (41.3%). There were more HIV negative patients (59.4%) than positive patients (40.6%). Conclusion: This study demonstrated some important characteristics of tuberculosis patients. Such knowledge if taken into consideration in the tuberculosis control programme will definitely improve the outcome of the programme.
Household Waste Management; Voices of Residents of Anaocha Local Government Area of Anambra State, Nigeria  [PDF]
E. C. Azuike, S. A. Nwabueze, P. E. Onyemachi, B. N. Egenti, K. C. Okafor, R. C. Aniemena, I. N. Udedibia, J. O. Nwodo
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.612121
Abstract: Background: Waste management is the generation, prevention, characterization, monitoring, treatment, handling, reuse and residual disposition of social waste. The various methods of waste disposal include: recycling, composting, barging, burying, landfills method, incineration, and the use of mechanical destructors. Objective: The aim of this study was to assess the knowledge, attitude and practice of house hold waste management among the respondents and the factors affecting their choice of method. Methodology: This was a cross sectional descriptive study. There were 270 respondents. The study was carried out among households in Anaocha LGA of Anambra state. The study made use of a semi-structured interviewer administered questionnaire. Result: Majority had good knowledge of waste management and portrayed good attitude towards waste management practices. The commonest method of waste disposal practiced by the community was burning and majority practiced the various methods because the methods were convenient for them. Conclusion: The study showed that people, despite having good knowledge and attitude towards waste management still practiced wrong methods.
Susceptibility of Genetic Indices to Falciparum Malaria in Infants and Young Children in Southern Nigeria
K.N. Opara,I.A. Atting,I.G. Ukpong,A.A. Nwabueze
Pakistan Journal of Biological Sciences , 2006,
Abstract: We assessed the relationship between genetic indices and their susceptibility to malaria in children. A total of 372 children (210 clinically ill and 162 healthy) attending University of Uyo Teaching Hospital, Uyo, Nigeria, were screened for malaria parasitaemia, blood group, haemoglobin genotypes, haemoglobin concentration (Hb) and packed cell volume (PCV), using standard parasitological and haemotological methods of diagnosis. One hundred and fifty six (74.3%) of the clinically-ill children examined were parasitaemic for falciparum malaria. There was no significant difference between infection and sex. There was significant (p<0.05) difference between prevalence of malaria in the children and the expected. Children with genotype AA (92.3%) were more susceptible to malaria parasite than AS (5.1%) and SS (2.6%). The association of haemoglobin genotype with malaria was highly significant (p<0.001). The degree of susceptibility of different blood groups to malaria infection were blood groups O (46.2%); A (26.9%); B (21.8%); AB (5.1%). There was a significant (p<0.05) association between the blood group and malaria infection. Children with malaria parasitaemia had a significantly (p<0.001) lower haemoglobin concentration and packed cell volume than children without parasitaemia.
A Comparison of Higher-Order Active Band-Pass R-Filter Response with Equivalent Band-Pass RC-Filter Response at Varying Q-Factors  [PDF]
Alexander Nwabueze Amah, Iorkyaa Ahemen, Bernard Atsuwe
Circuits and Systems (CS) , 2014, DOI: 10.4236/cs.2014.510025
Abstract: In this paper a comparison of a sixth-order active band pass R-filter output response with the output response of a sixth-order band pass RC-filter at different quality factors (Q = 2, 5, 7, 8 and 10) was carried out at a fixed frequency of 10 KHz. The architecture used in the design is the multiple feedbacks for both filter networks. The simulated response characteristics show that both filters (R- and RC-filters) have their mid-band gains increasing with Q, while their bandwidths monotonically decreased with Q-values. The bandwidths are in the range of 22.23 dB to 62.97 dB and 55.49 dB to 50.81 dB (Q = 2 to 10) for R- and RC-filters respectively. At higher Q-values, R-filter showed better selectivity with a smaller bandwidth (400 Hz) at the edge of the pass band, when compared to 450 Hz for the RC-filter. The roll-off rate around 58.9 dB/decade for the R-filter appears to be that of a third-order filter response, while the RC-filter has its response in the range 106 to 132 dB/decade which is in the neighbourhood of an ideal sixth-order response (roll-off of 120 db/decade). A shift in the center frequency with Q was observed for the RC-filter only.
Convivencia forzosa: Experiencias familiares durante la emergencia sanitaria por el virus de la influenza humana A (H1N1) en la ciudad de México
Estrada Iguíniz, Margarita;
Desacatos , 2010,
Abstract: this article studies experiences of a group of families resident in mexico city during the april 2009 health emergency, caused by the outbreak of influenza a (h1n1). from a systemic approach, it analyzes the way that the forced reclusion, to which population was subjected due to the official measures implemented by the city's government, contributed to strengthen previous family dynamics that favored the occurrence of tensions and conflicts among their members. isolation also highlighted the resources held by each family to manage an exceptional situation, as was this sanitary emergency.
Rosemary Thorp en nuestra historia económica
Javier Iguí?iz
Revista Economía , 2009,
Abstract: "La nota no presenta resumen"
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