A Redescription of Spironoura duyagi from the Stomach of Malayan Box Turtles (Cuora amboinensis)

Two hundred and twenty-six worms taken from the stomachs of three Malayan box turtles (Cuora amboinensis) were studied. The worms were identified as Spironoura spp., and their numerical measurements and morphological details compared to other described species in the genus. The nematodes, generally, conformed to published descriptions of Spironoura duyagi, but varied so widely with regards to presence or absence of key diagnostic features that a complete taxonomic analysis was undertaken

A Redescription of Spironoura duyagi from the Stomach of Malayan Box Turtles (Cuora amboinensis)

Two hundred and twenty-six worms taken from the stomachs of three Malayan box turtles (Cuora amboinensis) were studied. The worms were identified as Spironoura spp., and their numerical measurements and morphological details compared to other described species in the genus. The nematodes, generally, conformed to published descriptions of Spironoura duyagi, but varied so widely with regards to presence or absence of key diagnostic features that a complete taxonomic analysis was undertaken

Oilfield Production Surveillance as a Management Tool for Environmental Monitoring

Oilfield production surveillance is the effective monitoring of petroleum reservoirs, producing wells, flow station facilities and flow lines. Through surveillance, the production of unwanted effluents (formation water,excess gas, etc.) can be controlled. Production problems such as sand production, emulsion, corrosion, scale formation and wax blockage can lead to disposal problems and poor integrity of facilities and consequent financial losses. This paper presents a system approach for carrying out oilfield production surveillance process. Using case studies it isshown that the process can be used to identify unfavourable conditions such as gas leaks, corrosivity, and unsafe wells. It is further recommended that the frequency of surveillance should be monthl

Prediction of Pressure Drop in Subsea Pipeline Using Pipesim Software

The number of offshore developments for which long-distance tie-back is usually implemented has increased recently, leading to increasing pressure loss concerns from such systems. In the literature, it revealed that pressure drop in multi-phase transport is quite complex to compute manually. Hence the need for multi-phase flow simulation software. PIPESIM is a leading industry software currently used in the oil and gas industry for multiphase flow simulation. In this study, a 64km subsea pipeline system comprising two sections; 23km, 22.064in ID and 41km, 24inch ID, coated with 3mm (0.003m) polyethene insulation and transporting multiphase hydrocarbon fluid in an ultra-deep-water field was modelled in PIPESIM. Network simulation for the base case was carried out at 114barg (114MPa) inlet pressure and 18.7MMSCfd gas flowrate. The observed system pressure drop was dependent on pipeline inlet pressure, flowrates, and internal pipe diameter. 13.8barg (13.8MPa) was lost from the system for the base case simulation. Sensitivity analysis carried out using Gas volumetric flowrates of 3, 12 and 18.7 MMSCFd. The inlet pressures of 57, 114 and 171barg combined with six different pipe diameters generated a unique combination of 81 data points that were used in the development of a pressure drop correlation using the LINEST regression analysis tool in Microsoft Excel. At high flowrate and high inlet pressure, the pressure-drop observed was minimal and vice versa. Also, at constant flowrates and inlet pressures, the pressure drop was observed to increase with increasing pipe sizes. An R2 value of 0.9226 was obtained from the analysis. The plot of Predicted Pressure-drop against Calculated pressure-drop similarly gave an R2 value of 0.8025. Both results showed usefully, and hence the developed correlation can be used as an estimate in the absence of PIPESIM software for pressure drop prediction purposes. Keywords: Pressure drop prediction, Multi-flow Simulation, PIPESIM, Pipe sizing, Regression Analysis DOI: 10.7176/IEL/10-2-06 Publication date:March 31st 202

Oilfield Production Surveillance as a Management Tool for Environmental Monitoring

Oilfield production surveillance is the effective monitoring of petroleum reservoirs, producing wells, flow station facilities and flow lines. Through surveillance, the production of unwanted effluents (formation water, excess gas, etc.) can be controlled. Production problems such as sand production, emulsion, corrosion, scale formation and wax blockage can lead to disposal problems and poor integrity of facilities and consequent financial losses. This paper presents a system approach for carrying out oilfield production surveillance process. Using case studies it is shown that the process can be used to identify unfavourable conditions such as gas leaks, corrosivity, and unsafe wells. It is further recommended that the frequency of surveillance should be monthly

Succession Management: A Proficient Resource in Organisational Sustainability?

The competitive business environment has made it imperative for organisations who desire to remain relevant put forward survival strategies. This study explores the effect of succession management on three dimensions of organizational sustainability among insurance industry employees in Nigeria. Data was collected from a sample of employees from selected companies. The study utilised structural equation modelling (SEM) to test the hypothesized model of succession management and organisational sustainability as separate but related processes. Looking at the three dimensions of sustainability (environmental integrity, economic prosperity and social sustainability) and how they impact succession management, the findings indicate that succession management has a significant relationship with organisational sustainability across all three dimensions. The study concludes that insurance companies comprehend the inherent potential of a robust and active succession management programme in the drive for organisational sustainability. The study further discusses the theoretical implications of the relationship

Exergetic analysis of breakfast cereal production in Nigeria

This work comprehensively studied energy and exergy analyses of breakfast cereal production in Nigeria. The process analysis method of energy accounting wa s used to evaluate the energy requirement for each of the five defined unit operations. The total energy used in the operation is 1,287.94 MJ. The types of energy used in breakfast cereal production were electrical, thermal and manual and the respective pe rcentages are 48.87%, 50.53% and 0.60%. It was estimated that an average energy intensity of 11.27 MJ/kg was required for the production of breakfast cereals. The most energy intensive operation was identified as the mixing operation followed by milling with energy intensities of 665.10 MJ/kg and 383.04 MJ/kg, respectively. The exergy analysis revealed that the roller dryer was responsible for most of the inefficiency (over 65.94%) followed by the wet mixer (27.40%). Suggestions for energy saving which will help in the reducing the high expenditure on energy and thus improve the profit margin were provided. Keywords : Energy, Exergy, Efficiency Breakfast Cerea

COMPARISON BETWEEN KAOLIN AND QUARTZITIC CLAY PERFORMANCE IN THE EFFECT OF WOOD ASH ADDITION ON THE MECHANICAL AND OTHER PROPERTIES OF PORCELAINISED STONEWARE TILES

Porcelain represents the foundation of the ceramic discipline and one of the most complex ceramic materials. Composed primarily of clay, feldspar and quartz, porcelains are heat treated to form a mixture of glass and crystalline phases. This focuses on raw materials with the addition of wood ash processing and mechanical behaviors. The use of wood ash as in manufacturing ceramic tiles can increase the utilization, as well as reduce the cost of raw materials in the tile industry and provide a competitive edge to Nigerian tile Manufactures against foreign competitions. Ring was taken ensured completion of the pozzolainic reactions instituted by the wood ash and the production of dense compounds acting as filler within the pores of the porcelain mass. It was also found that the higher the wood ash content in the porcelainª¤? the lower their strength and density, the permeability 5-10 % cow dung un clays is the best ratio that gives the desired combination of opposing qualities and density, thus the ratio that gives the optimum mechanical and other properties. It was noticed from this research work, clay with kaolinitic content is better used than clay with quartzitic content in formulating porcelainised stoneware tile specimenª¤? consisting of the mixture of both quartizitic and kaolinitic clay has better performance than ordinary quartzitic clay sample.ª¤

"Attacking the bureaucratic Elephant" - the State of selected public administration, political and policy reforms in new democracies: From decentralisation and partnership to the responsive citizen in the governance of the state

This article argues that there are several assumptions that guide and shape the issues of decentralisation and partnership in creating a responsible and citizen-focused public service in South Africa, in developed countries and in other developing countries. The first assumption is that decentralisation as a normative ideal ought to be pursued everywhere. The second assumption is that public administrators simply need to make decentralisation work for the citizenry and not question it at all. The third assumption is that decentralisation can work because centralisation has not. The fourth assumption is that if decentralisation is not working in the interests of the citizenry the fault lies elsewhere than with decentralisation itself – the corollary of this is to be found in the assumption where two public administrators simply need to find ways of making it work in the interests of the citizenry. And the fifth assumption is that centralisation equals bad and decentralisation equals good and the corollary of this is that states ought to pursue decentralisation both as an end and as a means to an end.am2016School of Public Management and Administration (SPMA

Structural behaviour of metakaolin infused concrete structure

This work researched into the use of metakaolin as a partial substitute for cement in concrete, metakaolin was obtained by the calcination of kaolin clay to about 700 0C Cement was replaced with the metakaolin at 0, 5, 10, 15, 20, 25, 30, and 35% at water cement ratio of 0.5. Tests such as chemical analysis, compressive strength, flexural or modulus of rupture and bond strength were carried out on the concrete samples. Chemical analysis results showed that the metakaolin is a class “N” pozzolan, while the mechanical test showed that the strength of concrete increased from 5% to 20% replacement, and the strength peaked at 20%, but decreased above this value; concrete made with metakaolin performed better than the control sample at all the percentage replacements used in this work.Keywords: Metakaolin, Calcination, Pozzolan, Chemical test, Mechanical tes