ABSTRACT Investigation on accumulation of selected heavy metals of Zinc, Mercury, Copper, Lead, Chromium and Nickel in sediment, water and muscle tissues of Clarias gariepinus (African catfish) and Oreochromis esculentus (Singida tilapia) fish was done in Lake Rukwa, Tanzania. Samples were obtained from transects of 100 m long extending from Luika and Songwe River mouths to offshore. Water and sediment samples were collected directly from the study sites while fish were obtained from fisherf...
Abstract : A simple replication-based mechanism has been used to achieve high data reliability of Hadoop Distributed File System (HDFS). However, replication based mechanisms have high degree of disk storage requirement since it makes copies of full block without consideration of storage size. Studies have shown that erasure-coding mechanism can provide more storage space when used as an alternative to replication. Also, it can increase write throughput compared to replication mechanism. To i...
ABSTRACT In this thesis we shall be dealing with some basic known approximated solution of model problems involving Navier-stoke equations for incompressible fluid as well as linear elasticity theory.these include well known poiseuilleflow, Couette flow, flow between concentric cylinders, boundary layer flow over impulsively stated plate,simply supported beam with uniform distributed load, cantilevered beam with uniformly distributed load,linear membrane problems, where also an integro-diffe...
ABSTRACT Present work is concerned with solved a coefficient inverse problem of one-dimensional parabolic equation by a higher-order compact finite difference method and we used this a fourth order efficient numerical method to calculate the function u(x, t) and the unknown coefficient a(t) in a parabolic partial differential equation. Also discussed the accuracy and efficiency of the fourth order finite difference formula compare with other finite difference methods such as FTCS explicit sc...
ABSTRACT The corrosion inhibition efficiency of Adansonia digitata (baobab) pulp and seeds methanolic extracts on mild steel in acidic media is investigated using different standard corrosion methods at room temperature. Weight loss measurement, Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS) were applied to evaluate inhibition efficiency in the presence of Adansonia digitata Pulp Extract (AdPE) and Adansonia digitata Seed Extract (AdSE) as corrosion inhibitors....
ABSTRACT In this study, a model to facilitate the establishment of sustainable ICT Hubs into the community was developed. In developing the model, a study was performed on the community and on the existing similar facilities of telecentres and living labs to identify community ICT needs and factors and challenges facing the existing facilities. The study comprised of 133 respondents of which 63 respondents were community members from four (4) wards of Dodoma municipality and 60 were benefici...
ABSTRACT Honey bee farming has been one of the earliest cultural and economic activity practiced by human being, dating back 15000 years ago in north of Africa in the times of the pharaohs. Honey is one of the most important natural products in the world which is produced by bees. However for decades honey bee farming monitoring in developing countries like Tanzania have depended much on cultural and traditional method of monitoring which cost time, money, and resources. Furthermore, efficie...
ABSTRACT This study has been conducted with the main objectives to investigate the pattern of students‟ performance in mathematics and to forecast the performance of students in mathematics in secondary schools in Zanzibar for next 6 years on the basis of best selected model. The study used secondary data of all 64,446 students from 123 schools of Zanzibar, who sat for final examination from 1986-2016. The yearly data of students' results were collected from Ministry of Education and Vocat...
ABSTRACT In recent years, ad-hoc wireless networks have experienced an increase in popularity and usage due to their flexibility and the ability to provide connectivity from anywhere, at any time. Ad-hoc wireless network provides mobile communications to nodes in situations where the participating nodes are not in need of existing network infrastructure. The detection of malicious nodes is hard to achieve due to its dynamic nature of nodes mobility, lack of infrastructure and the nature o...
ABSTRACT E-Government is regarded as an important tool to help governments meet their goals. The theory of New Public Management arguably motivated the use of Information Communication Technologies (ICTs) in government with the idea of improving service delivery. However, e-Government use by citizens remains low. On the other hand, government’s vision of an inclusive e-Government has to still yield results, as many citizens are still not using the available e-government services. This chall...
ABSTRACT Hydro-geophysical study of Mbano and environs, Southeastern Nigeria was carried out with the objective of estimating aquifer hydraulic parameters from resistivity data. Thirty-six (36) vertical electrical resistivity (VES) sounding data using the Schlumberger array were acquired with a maximum current electrode spread of 1000m using the ABEM Terrameter SAS 4000. Out of the thirty-six (36) VES soundings, fourteen (14) parametric soundings were carried out at the locations of existin...
ABSTRACT The determination of the components of stress on a pipe made of either linearly elastic or non-linearly elastic material and subjected to internal fluid pressure is of immense benefit to engineers. Chung et al [2] worked on a class of non-linearly elastic type with some degree of success. This work seeks an improvement on [2]. It will do this by obtaining such components of stress in a form that engineers will find easy to use. Towards obtaining the required components, the r...
ABSTRACT The protective and antioxidant properties of Aqueous Anti-ulcer Drug (AQAUD) against Aspirin-induced gastric ulcers in albino rats were investigated. In this study, thirty male albino rats were divided into five groups. Rats in group I served as normal control and received food and water. Animals in group II received food and water in addition to aspirin 400mg/kg.b.wt orally on the 14th day. Rats in groups III, IV and V received “AQAUD” 250mg/kg.b.wt, 500mg/kg.b.wt and Omeprazo...
ABSTRACT T h e Oil Palm T r u n k ( O P T ) fib e r w a s p r e t r e a t e d , using T e t r a o x o s ulp h a t e ( vi) a cid H 2 SO 4 , H y d r o c hlo ric a cid H Cl, a n d Trioxonitrate (v) acid HNO 3 , at temperature of 80 o C, and residence time varying from 15 to 45 minutes, and acid concentration between 1 - 2 . 5 % . I t w a s f o u n d t h a t t h e o p tim u m a cid c o n c e n t r a tio n a n d residence time for highest sugar yield, was 1% w/w and 30minutes for the three ac...