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Search Results: 1 - 10 of 6777 matches for " Tom Tabi Oben "
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Agro-Industrial Groundwater Quality Abuja FCT, Nigeria: An Evaluation for Urban and Peri-Urban (UPA) Agricultural Irrigation  [PDF]
Richard Ayuk II Akoachere, Omogbemi Omoloju Yaya, Areakpoh Thomson Eyong, Marcelle-Carole Pami Ngassam, Ernest Lytia Molua, Raymond Ndip Nkongho, Elizabeth Orock Ayuk, Tom Tabi Oben
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105698
From the declaration made by the African Mayors in Senegal; the Mayors and Municipal Health Officers of the Americas in Columbia; the City Executives of Cities and Local Governments of the World in Spain and in the context of the Millennium Development Goals MDG 1&7; there is a need for increased food production in urban and peri-urban areas UPA in the world. Sub-Saharan Africa faces more development challenges than any other major region of the world with most of the people living in slums, without access to adequate food, water, or sanitation. UPA contributes to increased food security, nutrition and livelihoods in a combination of ways giving access to consumer markets; less need for packaging, storage and transportation of food; potential agricultural-related jobs and incomes; non-market access to food for poor consumers; availability of fresh, perishable food. In Abuja FCT, 40% of the populations in UPA are farmers, a reason why the agricultural quality of its groundwater which is used for irrigation begs for our attention. 33% of the fresh vegetables in the Abuja Federal Capital Territory (FCT) are produced in Abuja UPA. In order to assess groundwater for agro-industrial suitability the following were used: Physicochemical parameters (pH, Temperature, Electrical Conductivity), Sodium Adsorption Ratio SAR, Permeability Index PI, Magnesium Adsorption Ratio MAR, Percent Sodium %Na, Kelly’s Ratio KR and Residual Sodium Carbonate RSC and the Wilcox diagram. pH ranged from, 4.8 - 7.9; EC, 13.4 - 1634 μS/cm; Temperature, 26℃ - 36.1℃ and TDS, 17.42 - 1094.78 mg/L.SAR (0.1 > SAR < 2.1), Percent Sodium (7.11 > %Na < 100), KR (0 > KR < 0.68), RSC (-9.8 > RSC < 0.55), PI (13.9 > PI < 932.4), and MAR (0 > MAR < 80.1). Comparing these values to WHO and the Nigerian Water Quality guidelines, SAR, %Na, KR, RSC, values are 100% suitable, while PI, 96.81% suitable, and MAR 56.46% unsuitable respectively for irrigational purposes in agriculture. The quality classifications of irrigation water based on the values: Sodium Adsorption Ratio SAR, Wilcox, Kelley Ratio KR, Residual Sodium Carbonate RSC, Permeability Index PI and Percent Sodium %Na; indicate that groundwater of Abuja FCT is suitable for irrigation purpose on all soil types and that the groundwater will not degrade the soil. However, United States Soil Salinity USSL Index of Abuja FCT groundwater fall in “very low to high salinity” and “low sodium hazard zone” and Magnesium Adsorption Ratio MAR indicates half of the groundwater as “not suitable”. Hence the groundwater in Abuja FCT should be used only on soils that are well drained.
Local Scale Edaphic Surveys in and out of a Pericopsis elata (Harms) Meeuwen Natural Forest Stand in East Cameroon  [PDF]
Georges Kogge Kome, Adalbert Adibime Onana, Mamouda Ngoucheme, Fritz Oben Tabi
Open Journal of Soil Science (OJSS) , 2018, DOI: 10.4236/ojss.2018.81001
Abstract: One of the problems limiting high survival rates of Pericopsis elata (afrormosia, assamela), a high value timber species, is lack of data on its pedological requirements. A study was conducted in the East Region of Cameroon to identify possible soil properties favoring its spatial distribution. Two test areas, in and out of a Pericopsis elata natural forest stand were identified and in each sampling units of 50 × 50 m delineated. Thirty eight and sixteen quadrats in and out of the stands were respectively sampled for soil physico-chemical properties, number of stems and diameter at breast height. Soil samples in each quadrat were analyzed following standard laboratory procedures. Soil properties were tested for normality and compared for the two sites using Student’s t-test. Principal component analysis and correlation analysis were performed on tree and soil data to identify soil factors responsible for spatial distribution. From our findings, key soil indicators favouring Pericopsis elata distribution appear to be acidity (soil pH and exchangeable acidity), base status (base saturation and exchangeable bases) and texture (clay content). More specifically, optimal soil conditions for growth and survival of Pericopsis elata are: pH (4.1 - 5.0), exchangeable acidity (<4.67 cmolc·kg-1), base saturation (6.2% - 17.8%), and clay content (24.0% - 49.0%), which should be considered in site selection for reforestation with Pericopsis elata.
Heart rate recovery and right ventricular systolic dysfunction in patients with obesity
Oben Baysan
Anadolu Kardiyoloji Dergisi , 2009,
The Role of Hyperinsulenemia as a Risk Factor for Pancreatic Cancer  [PDF]
Giuseppe Preziosi, Jude A. Oben, Giuseppe Fusai
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.410175

Background: Pancreatic cancer is associated with a very severe prognosis and identification of risk factors is essential. Diabetes and obesity are both established risk factors, and they both cause hyperinsulenemia. With this review we wished to appraise the evidence of a role of high insulin levels in causing pancreatic cancer. Methods: We searched PubMed, Embase, Cochrane Library and Medline, and all evidence on potential pathophysiology of hyperinsulenemia and pancreatic cancer was included. Metaand pooled-analysis on epidemiological evidence are reported, and individual studies were as appropriate for specific topics (role of therapies, central adiposity and role of physical exercise). Conclusion: Hyperinsulenemia, and possibly hyperestrogenism secondary to a metabolic syndrome, are important elements in the pathogenesis of pancreatic cancer. Modification of certain life-style factors (exercise and weight loss) appears to modify the risk of pancreatic malignancy.

Cobweb Model with Buffer Stock for the Stabilization of Tomato Prices in Ghana
Martin Anokye,Francis Tabi Oduro
Journal of Management and Sustainability , 2012, DOI: 10.5539/jms.v3n1p155
Abstract: In this paper a linear cobweb model is developed to study the phenomenon of commodity price fluctuations and then a buffer stock incorporated into the model to stabilize the price of fresh tomatoes in Ghana. The model performed on the assumptions that fresh tomatoes have no equal substitutes, and that there is no foreign competition and also no exogenous shocks needed to generate price fluctuations. The analysis detected that the slope of the demand function of price was smaller than the slope of the supply function of price curve implying that the price and quantity supplied of the fresh tomatoes would oscillate around a fixed price and quantity and also spiral outward. The “Keep Supply at Average” (KSA) buffer scheme achieved price and quantity stability in the short run. The mean price of the scheme was GH¢17.31, very close to actual price mean of Gh¢ 13.40 in the first 16 quarters. The standard deviation of the scheme price also dropped to 1.2 from 9.13 during price stabilization compared to 14.60 of actual price mean. In the long run the scheme price went up to Gh¢ 18.22, an increase of Gh¢ 0.91 and it is clear that in long run buffer system will fail unless the average supply is reviewed regularly. The scheme price trend equation indicated that with the implementation of the buffer scheme, the average quarterly price of fresh tomatoes increased by only 0.05.
Inflation, Money and Economic Growth in Cameroon
Henri Ngoa Tabi,Henri Atangana Ondoa
International Journal of Financial Research , 2011, DOI: 10.5430/ijfr.v2n1p45
Abstract: For some decades now, anti-inflationary monetary policies have been adopted by the Central bank of the CEMAC zone in view of sustaining economic growth. Despite the low level of inflation recorded, the economic growth of Cameroon remains fragile. The objective of this article is to analyse the relationship between economic growth, inflation and money in circulation using a VAR model for the period 1960-2007. It is shown that increase in money supply increases growth and that growth causes inflation; however, an increase in money supply does not necessarily increase inflation.
Industrialization of the Manufacturing Sector and Trade Opening in Cameroon
Henri Ngoa Tabi,Henri Atangana Ondoa
Research in World Economy , 2011, DOI: 10.5430/rwe.v2n1p58
Abstract: In this paper, the authors investigate the effect of trade opening on the industrialization of the manufacturing sector in Cameroon using the error correction model. The study uses data from the World Bank in the period 1967-2007. Our findings show that the long-term relationship between trade opening and industrialization of the manufacturing sector is not stable and that trade opening negatively affects the manufacturing sector of Cameroon. This result is explained by the fact that importations of some food products and inputs cannot be reduced. Moreover, Cameroon manufacturing enterprises are apparently unable to satisfy domestic demand.
Assessing the Role of Transport in the Achievement of Maternal Mortality Reduction in Ghana
Patrick Fiagbe,David Asamoah,Francis Tabi Oduro
International Journal of Business and Management , 2012, DOI: 10.5539/ijbm.v7n5p256
Abstract: Purpose: this study seeks to find the role and impact of transport’s intervention in the achievement of the maternal mortality reduction in Ghana. The study used a number of approaches including case study, descriptive and exploratory approaches, and all these were adopted to gain a better understanding on the role of transport in the achievement of maternal death reduction. The study revealed that good vehicles and road infrastructure are perceived as a key link between potential accessibility and actual utilization of maternal health services. Again finding out the possibility of achieving zero maternal death in the municipality by the year 2015, health management staff perceived that it is likely to be achieved in Ghana; a little deviation from the report by African countries’ MDG Africa Steering Group.
Fiscal Policy, Labour Productivity Growth and Convergence between Agriculture and Manufacturing: Implications for Poverty Reduction in Cameroon
Tabi Atemnkeng Johannes,Aloysius Mom Njong
Asian Social Science , 2012, DOI: 10.5539/ass.v8n4p190
Abstract: This paper examines the factors that drive labour productivity convergence between agriculture and manufacturing activities in Cameroon over 1969-2005. It is supposed that whenever one sector grows in terms of labour productivity it will also bring benefit to other industries. For instance, agriculture plays a significant role in reducing poverty. The bulk of the poor are engaged in agriculture and so an increase in agricultural productivity has a significant potential for reducing such poverty. Our findings indicate that while government spending on education, health, and road infrastructures promotes convergence, agricultural spending reinforces inequality in sectoral labour productivity by disproportionately increasing non-agricultural sector productivity. Furthermore, increases in manufacturing and service productivity levels both have a positive impact on agricultural productivity in the long-run, with manufacturing equally contributing in the short-run.
Chopped basalt fibres: A new perspective in reinforcing poly(lactic acid) to produce injection moulded engineering composites from renewable and natural resources
P. Tamas,T. Tabi,J. G. Kovacs
eXPRESS Polymer Letters , 2013, DOI: 10.3144/expresspolymlett.2013.11
Abstract: This paper focuses on the reinforcing of Poly(lactic acid) with chopped basalt fibres by using silane treated and untreated basalt fibres. Composite materials with 5–10–15–20–30–40 wt% basalt fibre contents were prepared from silane sized basalt fibres using extrusion, and injection moulding, while composites with 5–10–15 wt% basalt fibre contents were also prepared by using untreated basalt fibres as control. The properties of the injection moulded composites were extensively examined by using quasi-static (tensile, three-point bending) and dynamic mechanical tests (notched and unnotched Charpy impact tests), dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), heat deflection temperature (HDT) analysis, dimensional stability test, as well as melt flow index (MFI) analysis and scanning electron microscopic (SEM) observations. It was found that silane treated chopped basalt fibres are much more effective in reinforcing Poly(lactic acid) than natural fibres; although basalt fibres are not biodegradable but they are still considered as natural (can be found in nature in the form of volcanic rocks) and biologically inert. It is demonstrated in this paper that by using basalt fibre reinforcement, a renewable and natural resource based composite can be produced by injection moulding with excellent mechanical properties suitable even for engineering applications. Finally it was shown that by using adequate drying of the materials, composites with higher mechanical properties can be achieved compared to literature data.
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