Knowledge Infrastructure, Service Sector, And Economic Growth In Africa

Economic theory and studies have theoretical and empirical evidence suggesting that countries which remain underdeveloped have consistently low levels of human capital, and a large agricultural sector. Of equal importance are the roles of the information technology and service sectors in improving economic growth and stability. This paper examined the extent to which non-industrial factors, such as information technology, knowledge infrastructure, and the service sectors activities helped contribute to the economy of African nations. The results from the analysis of 38 African nations indicate the information infrastructure for index public expenditures on education and personal computers per 1,000 capita contributed significantly to economic productivity

Social Attributes And Economic Instability In Africa

How do the social characteristics of African economies affect their relative economic stability? This paper offers a new nominal definition of economic instability in terms of average standard deviations from the exponential growth path suggested by neoclassical growth theory under ideal conditions. We used the portion of the population that subsists on agriculture as an indication of how diverse and adaptable any particular economy is. Literacy rates may serve as a proxy for the quality and adaptability of the labor force in the various countries. Other variables used are urban population as a percentage of total population, life expectancy, infant mortality rates and the corruption perception index. These variables were all statistically significant in explaining economic instability with the exception of corruption perception index and infant mortality rates that were statistically insignificant

Economics & Religious Implications On Adult Literacy In Sub-Saharan Africa

Although literacy rates have improved somehow in recent years, there are still large numbers of people that are illiterates in developing countries.  This paper examines the impact of public education expenditures, the percentage of urban population and religious affiliation on adult literacy rate in Sub-Saharan Africa. In this study, a cross-sectional data of 34 Sub-Saharan African countries with adequate data information were analyzed. The results from the ANOVA and Ordinary Least Square (OLS) regression analysis are quite conclusive - that urban population, government expenditures on education and religious affiliations do have strong statistical impact on literacy

Social Attributes And Economic Instability In Africa

How do the social characteristics of African economies affect their relative economic stability? This paper offers a new nominal definition of economic instability in terms of average standard deviations from the exponential growth path suggested by neoclassical growth theory under ideal conditions. We used the portion of the population that subsists on agriculture as an indication of how diverse and adaptable any particular economy is. Literacy rates may serve as a proxy for the quality and adaptability of the labor force in the various countries. Other variables used are urban population as a percentage of total population, life expectancy, infant mortality rates and the corruption perception index. These variables were all statistically significant in explaining economic instability with the expectation of corruption perception index and infant mortality rates which were statistically insignificant

Assessment of the biochemical methane potential of in-house and outdoor stored pig and dairy cow manure by evaluating chemical composition and storage conditions

Biogas production is a suitable option for producing energy from dairy and pig manure types. During manure storage, organic matter degradation results in methane emissions decreasing the potential biogas yield. The present research advances the understanding of the biochemical methane potential (BMP) and the chemical characteristics of manure collected year-round from sequential stages of the liquid manure management chain of commercial dairy cow and pig farms. To this end, manure samples from six livestock farms in Germany were analyzed. The results showed that changes in chemical composition during storage led to a 20.5% decrease in the BMP of dairy manure from the barn to outdoor storage. For fattening pig manure samples, there was a 39.5% decrease in the BMP from intermediate to outdoor storage. An analysis of BMP according to manure age showed that pig manure degrades faster than dairy manure; the importance of promptly feeding manure to the biogas plant in order to avoid significant CH4 emission losses and reduction in energy producing capacity was highlighted. The best BMP predictors for dairy manure were the contents of dry matter, volatile solids and lignin, whereas best BMP predictors for pig manure were dry matter and volatile fatty acid (VFA) content. Prediction models performed well for samples from outdoor storages; refinements for predicting BMP of less aged samples presenting lower chemical variability would be necessary

Methane Emissions from Livestock Slurry: Effects of Storage Temperature and Changes in Chemical Composition

Livestock production contributes to releasing methane into the atmosphere. Liquid manure management offers significant opportunities to reduce these emissions. A better understanding of the factors controlling methane emissions from manure is necessary to select effective mitigation strategies. Our study aimed to identify the influence of storage temperature and the associated change in chemical composition on methane emissions from dairy and fattening pig manure. Storage temperature affects microbial activity and induces changes in chemical composition that are key influences in methane emissions. Dairy and fattening pig manure samples were stored at five different temperatures (5–25 °C) for 90 days in a laboratory-scale experiment to measure the methane production. The chemical composition of the slurry samples was analyzed, and the biochemical methane potential (BMP) tests were performed before and after storage. For pig manure stored at 25 °C and 20 °C, methane emissions accounted for 69.3% and 50.3% of the BMP, respectively. Maximum methane emissions for dairy slurry were observed at 25 °C but remained at a low level. Analyses of the accumulation of volatile fatty acids (VFAs) during storage are presented in few studies, this work revealed a potential inhibition of methane production, where the accumulation of VFAs was most elevated in samples stored at 20 °C and 25 °C. This partly counteracted the increase in methane emissions expected from the higher temperatures. The degree of VFA and dissociated fatty acids accumulation in dairy cattle slurry should be assessed for more accurate estimations of methane emissions from slurry stores

Cooperative Learning Structure: Catalyst for Effective Learning for Adult Learners in Higher Education

In this research study, the impact of cooperative learning structures on adult education student’s engagement and learning outcomes were examined. The goals of the study are to (1) examine the impact of participation in cooperative learning structures on student’s learning outcomes, (2) examine the impact of participation in cooperative learning structures on student’s engagement, and (3) determine student’s attitude towards cooperative learning structures.  The results from the descriptive and inferential statistics indicate that there were statistically significant differences in the learning outcomes of students that participated in the cooperative learning structures. The results from the qualitative analysis show that students who participated in the cooperative learning environment were actively engaged with peers and teacher

Mining Deep-Ocean Mineral Deposits: What are the Ecological Risks?

A key question for the future management of the oceans is whether the mineral deposits that exist on the seafloor of the deep ocean can be extracted without significant adverse effects to the environment. The potential impacts of mining are wide-ranging and will vary depending on the type of metal-rich mineral deposit being mined. There is, currently, a significant lack of information about deep-ocean ecosystems and about potential mining technologies: thus, there could be many unforeseen impacts. Here, we discuss the potential ecological impacts of deep-ocean mining and identify the key knowledge gaps to be addressed. Baseline studies must be undertaken, as well as regular monitoring of a mine area, before, during, and after mineral extraction

Multimedia delivery in the future internet

The term “Networked Media” implies that all kinds of media including text, image, 3D graphics, audio and video are produced, distributed, shared, managed and consumed on-line through various networks, like the Internet, Fiber, WiFi, WiMAX, GPRS, 3G and so on, in a convergent manner [1]. This white paper is the contribution of the Media Delivery Platform (MDP) cluster and aims to cover the Networked challenges of the Networked Media in the transition to the Future of the Internet. Internet has evolved and changed the way we work and live. End users of the Internet have been confronted with a bewildering range of media, services and applications and of technological innovations concerning media formats, wireless networks, terminal types and capabilities. And there is little evidence that the pace of this innovation is slowing. Today, over one billion of users access the Internet on regular basis, more than 100 million users have downloaded at least one (multi)media file and over 47 millions of them do so regularly, searching in more than 160 Exabytes1 of content. In the near future these numbers are expected to exponentially rise. It is expected that the Internet content will be increased by at least a factor of 6, rising to more than 990 Exabytes before 2012, fuelled mainly by the users themselves. Moreover, it is envisaged that in a near- to mid-term future, the Internet will provide the means to share and distribute (new) multimedia content and services with superior quality and striking flexibility, in a trusted and personalized way, improving citizens’ quality of life, working conditions, edutainment and safety. In this evolving environment, new transport protocols, new multimedia encoding schemes, cross-layer inthe network adaptation, machine-to-machine communication (including RFIDs), rich 3D content as well as community networks and the use of peer-to-peer (P2P) overlays are expected to generate new models of interaction and cooperation, and be able to support enhanced perceived quality-of-experience (PQoE) and innovative applications “on the move”, like virtual collaboration environments, personalised services/ media, virtual sport groups, on-line gaming, edutainment. In this context, the interaction with content combined with interactive/multimedia search capabilities across distributed repositories, opportunistic P2P networks and the dynamic adaptation to the characteristics of diverse mobile terminals are expected to contribute towards such a vision. Based on work that has taken place in a number of EC co-funded projects, in Framework Program 6 (FP6) and Framework Program 7 (FP7), a group of experts and technology visionaries have voluntarily contributed in this white paper aiming to describe the status, the state-of-the art, the challenges and the way ahead in the area of Content Aware media delivery platforms

Acute toxicity, antipyretic and antinociceptive study of the crude saponin from an edible vegetable: Vernonia amygdalina leaf

Vernonia amygdalina is commonly used for food and health purposes. Processing of the leaf for food is aimed at removing bitter tasting antinutritional principles like saponins. This study was designed to determine the antipyretic and antinociceptive property of the crude saponin from Vernonia amygdalina leaf. Standard procedure for antipyretic study using Saccharomyces cerevisiae induced pyrexia in rats; and acetic acid induced writhe, hot plate and cold tail flick tests for antinociceptive study in mice were used. Data for the crude saponin showed significant (P ≤ 0.05) dose dependent anal temperature decrease. The antinociceptive data in mice was significant (P ≤ 0.05) in the writhing test contrary to the cold tail flick test. In acute toxicity study, an LD50 of 5.1523 g/kg using oral route indicated it was practically non-toxic. Finding suggests that Vernonia amygdalina leaf prepared as diet could be of potential benefit to ailing persons with fever and/or pains, if processing technique adopts minimal loss of principles like saponins.Keywords: Mice, oral, pain, pyrexia, ra