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Search Results: 1 - 10 of 1118 matches for " Nat Owusu-Prempeh "
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Floral diversity and carbon stocks and of protected forest ecosystem: A case of UENR’s Bat Sanctuary, Sunyani, Ghana  [PDF]
Nat Owusu-Prempeh, Osei Owusu Antobre, Thomas Agyei
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.81003
Abstract: The study assesses the functional status of the University of Energy and Natural Resources’ (UENR) bat sanctuary by examining its floral diversity and carbon stocks. Twenty-nine sampling points (plots) were randomly generated by using the ArcGIS random sampling algorithm. Using a three-nest sampling plot of 100m2, 25m2, and 1m2 quadrat, the enumeration of trees (DBH>10cm), saplings (>2cm DBH <10cm) and seedlings (girth <2cm) was undertaken, respectively. Additionally, the diversity of each floral species was computed using the Shannon Wiener diversity index whilst the carbon stocks were estimated using allometric equations. The total carbon stock per plot was derived from the summation of the aboveground carbon (AGC), belowground carbon (BGC) and deadwood carbon (DWC). In sum, 450 floral individuals belonging to 47 species and 22 families were enumerated with Bignoniaceae (16.4%), Apocynaceae (10.0%), Caesalpiniaceae (9.2%) and Rubiaceae (8.8%) being the most common families within the protected area (PA). The average carbon sequestered per hectare of the PA was 2,789.3 tons. However, there was no significant difference (p>0.05) between the 10m buffer created and the core area with respect to species diversity and carbon stocks. The study has provided valuable information on the functional status of the bat sanctuary which will help promote its conservation for sustained provision of ecosystem services.
Analgesic activity of crude aqueous extract of the root bark of zanthoxylum xanthoxyloides
ABA Prempeh
Ghana Medical Journal , 2008,
Abstract: Objective: The analgesic activity of crude aqueous extract of the root bark of Zanthoxylum xanthozyloides was studied in mice and rats with the view to verifying the claim in folklore medicine that the extract has analgesic activity. Method: The extract was obtained by Soxhlet extraction and rotatory evaporation, followed by freezedrying. Groups of rats and mice were, respectively, assigned randomly to treatment groups. The animals received three different treatments orally: 0.9% saline (control), the extract (400mg/kg and 800mg/kg for mice; 1000mg/kg and 2000mg/kg for rats) and indomethacin (5mg/kg and 10mg/kg for mice; 10mg/kg and 20mg/kg for rats). Each group of animals was rotated through the entire treatment groups such that each animal served as control as well as received all the treatments. The hot-plate and paw-pressure methods were used to study pain perception in the treated animals. Analysis of variance was used as the statistical test. Results: In both methods, the extract and indomethacin caused dose-dependent elevation in pain threshold. At the peak of activity, 400mg/kg and 800mg/kg extract caused 74% and 95% increase in the reaction time respectively whilst 5mg/kg and 10mg/kg indomethacin gave 97% and 116% increment respectively. Similarly, 1000mg/kg and 2000mg/kg extract caused 65% and 84% increase in pain threshold whilst 10mg/kg and 20mg/kg indomethacin caused 95% and 113% increment respectively. Conclusion: It was concluded that the extract induced analgesia, probably, by inhibiting prostaglandin production, just as did indomethacin.
Generalizations of Some Inequalities for the $p$-Gamma, $q$-Gamma and $k$-Gamma Functions
Kwara Nantomah,Edward Prempeh
Mathematics , 2015,
Abstract: In this paper, we present and prove some generalizations of some inequalities for the $p$-Gamma, $q$-Gamma and $k$-Gamma functions. Our approach makes use of the series representations of the psi, $p$-psi, $q$-psi and $k$-psi functions.
Certain Inequalities Involving the $q$-Deformed Gamma Function
Kwara Nantomah,Edward Prempeh
Mathematics , 2015,
Abstract: This paper is inspired by the work of J. S\'{a}ndor in 2006. In the paper, the authors establish some double inequalities involving the ratio $ \frac{\Gamma_{q}(x+1)}{ \Gamma_{q} \left( x+\frac{1}{2}\right)}$, where $\Gamma_{q}(x)$ is the $q$-deformation of the classical Gamma function denoted by $\Gamma(x)$. The method employed in presenting the results makes use of Jackson's $q$-integral representation of the $q$-deformed Gamma function. In addition, H\"{o}lder's inequality for the $q$-integral, as well as some basic analytical techniques involving the $q$-analogue of the psi function are used. As a consequence, $q$-analogues of the classical Wendel's asymptotic relation are obtained. At the end, sharpness of the inequalities established in this paper is investigated.
《中国的人口控制——理论及其应用》评价
Nat
系统工程理论与实践 , 1991,
Abstract: 与以前任何一本著作相比,本书把数学人口统计学的研究向前推进了一大步。宋健和他的同事们不仅推广和概括了已有的理论和方法,而且还尝试运用成熟的数学理论,循着崭新的思路来研究真实人口。举几个例子。
Performance Evaluation and Measurements of 3G Mobile Communication Networks: A Case Study  [PDF]
Kwame Agyeman-Prempeh Agyekum, Eric T. Tchao, Emmanuel Affum
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.34018
Abstract: Communication networks have undergone rapid developments in the past few decades in many Sub-Saharan African countries. The increasing number of subscribers and demand for greater variety of services in these countries make it difficult for network operators to provide the service varieties subscribers want while maintaining acceptable levels of quality of service. This paper analyzes the radio network of cellular networks in terms of traffic distribution over the existing number of communication channels using MATLAB/Simulink. A scale-free user network, which takes into account user behavior in a realistic physical network, has been used to model a more realistic cause for call blockings in a typical cellular network deployment under a Sub-Saharan environment. Peak recorded traffic distribution was observed to have overwhelmed the existing number of channels provided by the network operators for some cells eventually leading to increase in call drop rates. This high call blocking probability was attributed to poor network monitoring by the network operators to match the ever changing traffic intensities.
Household Perceptions, Treatment-Seeking Behaviors and Health Outcomes for Buruli Ulcer Disease in a Peri-Urban District in Ghana  [PDF]
Adobea Yaa Owusu, Clement Adamba
Advances in Applied Sociology (AASoci) , 2012, DOI: 10.4236/aasoci.2012.23024
Abstract: Buruli ulcer (BU) has been associated with very unimaginable outcomes. It is flesh eating, disfiguring and economically dehydrating. Yet the disease is still mostly shrouded in mystery. Consequently, people have different perceptions about it and hence adopt different treatment behaviorss towards it; notwithstanding the free treatment for it. The purpose of this paper is to identify and examine respondents’ perceptions and the influence these have on their health seeking behaviorss. Eighty-six BU patients who had been treated or were being treated of BU in the Ga West District Health Center in Ghana were sampled for this study. A structured questionnaire and a qualitative in-depth interview guide were used to elicit the data. Some of the interviewees held the belief that the disease is caused by their adversaries, including witches. More than half of the respondents, however, did not have any idea about the disease and thought it is just the work of God. The first point of call for health care for most of the patients studied was herbalists or else they used herbs. Nearly a quarter of them also engaged in self medication, including the use of ‘pain killers’ and ointments, since they took the first signs for ordinary boils. Perceptions of the cause of the disease influenced health seeking behaviors, which further influenced treatment outcomes. A lot of education is needed on the symptoms of the disease, including encouraging early seeking of care at the District Health Center.
Ecotourism as a Conservation Tool - A Case of Afadjato–Agumatsa Conservation Area, Ghana
EH Owusu
Journal of Science and Technology (Ghana) , 2008,
Abstract: Nature tourism is being increasingly promoted as a means to combat the inequality and dependency in rural areas. Furthermore, ecotourism as a subset of nature tourism has emerged as a potential mechanism for involving rural communities in the management of their natural resources, and thus benefit from their conservation efforts. This paper presents the results of a study undertaken within three traditional areas around the Mt. Afadjato and Agumatsa Range in Ghana. I examined local peoples\' perceptions on whether the costs of conservation can be offset with the potential benefits of the biodiversity of the area. Local people in all traditional areas see ecotourism as an opportunity to develop the area than as a conservation tool. However, the status of biodiversity, and the range of potential opportunities and costs, suggest that local people could benefit more from conservation and ecotourism, if they are prepared to the bear the costs. Equally, this will only be possible with the adoption of a holistic strategy that embraces the conservation of the whole of the Mt. Afadjato and Agumatsa Range, rather than the piecemeal approach currently being promoted by different traditional areas. Furthermore, since poverty in diverse forms is considered as one of the major threats to sustaining biodiversity, benefits from ecotourism must be appropriately targeted so that local people benefit and understand that these benefits are linked to the conservation of natural resources of the Afadjato-Agumasta Conservation Area.
A GIS-Based Estimation of Soil Loss in the Densu Basin in Ghana
G Owusu
West African Journal of Applied Ecology , 2012,
Abstract: Distributed erosion simulation models are useful in evaluation of different strategies for land-use and soil management improvement in watersheds. The increased soil erosion in Densu basin of Ghana has led to siltation of the river channel that is causing flooding in some parts of Accra, Ghana. The most urbanized basin in Ghana, Densu, supplies water to 600,000 people, with agriculture employing about 40% of the active population. A PCRaster GIS soil loss risk maps have been developed for Densu basin using models of Universal Soil Equation (USLE) and Revised Universal Soil Equation (RUSLE). Soil loss factors such as rainfall erosivity, soil erodibilty, slope and slope length were also mapped for the basin. The model predicted average, minimum and maximum annual soil loss rates of 2.2, 0, and 63 t ha–1y–1 , respectively, indicating that some areas in the basin are above tolerance level of 5.0 t ha–1yr–1. The total soil loss was 756,507 tonnes per hectare per year. Among the soil types Lixisols experienced the highest soil loss of 402,080 t ha–1 yr–1 with Plinthosols experiencing the lowest soil loss of 64 t ha–1 yr–1. Among the administrative districts in the basin Suhum, Kraboa and Coaltar experienced the highest absolute soil loss of 216,957 t ha–1 yr–1 while Fanteakwa experienced the highest average soil loss of 4.5 t ha–1 yr–1. The results can serve as data and information to water resources managers and soil conservationists.
The Perceptions of Local Communities towards the Conservation of Birds in an Important Bird Area in Ghana
EH Owusu
West African Journal of Applied Ecology , 2008,
Abstract: The important bird areas (IBA) concept provides a practical index of the diversity and condition of an ecosystem on a site-by-site basis using birds as indicators. It is believed that protecting and managing such sites will result in the conservation of some of the most sensitive, fragile and ecologically rich habitats in the world. However, acceptance of the IBA concept and, thus, site conservation action, by local communities is dependent on their perception of the importance of birds with regard to some aspects of their livelihood. The study was undertaken to examine the importance local communities around an IBA, the Afadjato and Agumatsa Conservation Area in Ghana, attach to conservation of birds, and their relevance as an indicator of environmental quality. Results obtained from a questionnaire survey, combined with group interviews, suggest that the importance local communities attached to bird conservation in the area was, to a large extent, dependent on the village or locality where people lived. West African Journal of Applied Ecology Vol. 13 2008: pp. 111-116
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