1,720,958 research outputs found
Biodegradation Potential of Oil-based Drill Cuttings Encapsulated with Cement in the Soil Environment
Get PDFBiodegradation potential of slabs made from oil-based drill cuttings
encapsulated with cement in a soil environment has been experimentally
investigated. Results of soil analyses show that physico-chemical and
biological characteristics of the soil environment as; pH (5.6 –
3.9), temperature (27.7 – 39.5 oC), redox potential (-114mV
– (-80mV), total organic carbon (12.7% - 7.3%), sulphate (0.7
– 0.2mg/l), nitrate (6.7 – 2.2mg/l), moisture content
(82-89%) and total microbial count (105 – 1013 cfu/g).
Experimental results shows a mass loss of oil base drill cuttings
encapsulated with cement slab during the period of the study,
indicating approximate linear relationship between mass loss and time.
When the log of mass-loss is plotted against time, an approximate
linear relationship is obtained confirming a first-order chemical
reaction for the biodegradation process. Results of the analyses of the
soil sample indicate an environment that has the potential to degrade
cement encapsulated oil based drill cuttings
Biodegradation Potential of Oil-based Drill Cuttings Encapsulated with Cement in the Soil Environment
Get PDFBiodegradation potential of slabs made from oil-based drill cuttings
encapsulated with cement in a soil environment has been experimentally
investigated. Results of soil analyses show that physico-chemical and
biological characteristics of the soil environment as; pH (5.6 –
3.9), temperature (27.7 – 39.5 oC), redox potential (-114mV
– (-80mV), total organic carbon (12.7% - 7.3%), sulphate (0.7
– 0.2mg/l), nitrate (6.7 – 2.2mg/l), moisture content
(82-89%) and total microbial count (105 – 1013 cfu/g).
Experimental results shows a mass loss of oil base drill cuttings
encapsulated with cement slab during the period of the study,
indicating approximate linear relationship between mass loss and time.
When the log of mass-loss is plotted against time, an approximate
linear relationship is obtained confirming a first-order chemical
reaction for the biodegradation process. Results of the analyses of the
soil sample indicate an environment that has the potential to degrade
cement encapsulated oil based drill cuttings
The Perspective of Participatory Rural Appraisal (PRA) Approach for Sustainable Development
No full textUnsustainable practices have the potential of eroding earth's web of life (air, water and soil) and can also promote poverty. Efforts by government in promoting sustainable development have not yielded the expected results. This paper attributed the failure to the top-bottom approach adopted by governments in planning, executing and monitoring community developmental projects. Mir study suggests a paradigm shift from the top-bottom approach to bottom-up approach, which implies the involvement of local people in all phases of developmental projects. This is the essence of participatory _rural appraisal ( PRA)
Urban solid waste management: the role of strategic communication
Get PDFIn Nigeria, the challenges of urban solid waste management are palpable. The volume of solid waste that is visible at the urban centres is a measure of the failure of the current practices. The declaration of one of the Saturdays of every month by various state governments as environmental sanitation day and the use of radiojungles has notyielded the expected results. It is on this basis that this paper proposed a methodological shift from conventional approaches of mere radiol television announcement to strategic communications planning. The study pointed out the role of strategic communication in addressing the challenges posed by urban solid waste management. Thesix-step pyramid of strategic communication plan (communication infrastructure, establishment ofgoals, target audience. frame the issue, crafting ofmessage and media tactics) was proposed
Physico-chemical analyses and corrosion effect of produced water on low carbon steel
No full textThe corrosion effect of produced water on low carbon has been investigated using the weight loss technique. The composite produced water sample was found to contain pH (5.3), turbidity (82 NTU), conductivity (8920 Ns/cm), salinity (2394 mg/L), total iron (1.28 mg/L), carbonate (140 mg/L), nitrate (42.74 mg/L) and suphate (nil mg/L). At an exposure time in hours of 120, 240, 360, 480, 600, and 720, the corresponding calculated corrosion rates in many of the coupons were 0.077, 0.153, 0.204, 0.345, 0.352, and 0.370 respectively. Physico-chemical characteristics of the composite produced water sample used for the study has a higher concentration compared with DPR standard for discharge of produced formation water into surface environment.It was assumed that the corrosion of the coupons was due to presence of high chemical matters in the produced water sample.Keywords: corrosion, produced water, environment, rock, salinity, dissolved oxygen.Global Journal of Pure and Applied Sciences Vol. 11(4)2005: 511-51
Consideration of phthalates distribution in underground water in some selected regions in Delta State, Southern Nigeria
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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