ABSTRACT This study conducted within southern parts of Rufiji Trough include Lukuliro area which has been potential target for oil and gas exploration since 1980’s years. Within Rufiji trough, the discovery of Wingayongo seeps (onshore) and SongoSongo gas (offshore) attract attention on exploration activities within Rufiji trough. The previous works conducted within Lukuliro area failed to establish traps which are well demonstrated in this study. The structural and sequence stratigraphy f...
Abstract: This paper presents a survey of recent development in Fault Localisation and Service Restoration (FLSR) following electrical disturbance in Power Distribution Systems (PDS) based on distributed approaches. Distributed approaches have been found to fit well in the distribution systems as they have more than one decisionmaking component, and data processing can be done in parallel in individual units that makes it faster and requires less processing capabilities centrally. Recently re...
ABSTRACT There has been a proliferation of base station towers in recent years due to an expansion of mobile telephone networks. This has been accompanied by an increase in the level of community concern about possible health effects from the radio frequency (RF) radiation emissions from antennae mounted on the base station towers. The researcher aimed at measuring RF electromagnetic energy (EME) levels and compare with the maximum permitted limit for general public exposure given by Interna...
ABSTRACT Powerline communication (PLC) is a promising technique for information transmission using existing power lines. Broadband over power lines is the way of providing internet services to customers using high frequency signals integrated in the power wiring. The internet signals are modulated and coupled into the overhead power lines. The signals are decoupled at the consumer’s premises. BPL can be a solution for people living in any rural area where there is electricity, since the co...
ABSTRACT Vehicular Ad-hoc Network (VANET) is a subclass of Mobile Ad-hoc Network where by vehicles on the road network are able to exchange data. Many automobile manufacturers make vehicles which are pre-equipped with devices such as Geographical Position System (GPS), Radar and Lidar, Bluetooth, Onboard LTE module. Therefore, in the future, Selfdriving cars will be available in many countries and voice communication between vehicles will present many services ranging from safety to non-safe...
ABSTRACT Indoor broadband power-line communication (BPLC) networks with different number of branches, different terminal load impedance, different line length and impulsive noise using OFDM were considered. Earlier investigations have shown that the power-line channel suffers from multipath effects along with impulsive noise. In this dissertation the OFDM system was designed based on Anatory et al model using the impulse responses of typical Tanzania indoor power-line networks. It was observe...
ABSTRACT Biodiesel, defined as the monoalkyl esters of vegetable oils and animal fats, is becoming prominent among alternatives to conventional petro-diesel due to economic, environmental and social factors. Transesterification is the most preferred method of biodiesel production. Knowledge of transesterification reaction kinetic enables prediction of the extent of the chemical reaction (or the conversion) at any time under particular conditions. It is also essential in the optimization of op...
Abstract A study on the flow characteristics in the cross-flow turbine model T15 300 has been conducted. The study was designed to examine the fluid flow trajectory in the turbine and identify areas for further improvement. Computational fluid dynamics (CFD) approach was employed and the results were compared with experimental data. The simulation study was conducted at guide vane angle of 20o, 30o, 35o and 41o. The shaft diameter was set at 30 mm, 45 mm, 60 mm, and 75 mm for each head while ...
ABSTRACT Due to tremendous growth of multimedia applications over networks such as the Internet, multimedia traffic causes network congestion, which results into packet loss due to transmission errors resulted by low data transmission reliability. Forward Error Corrections techniques, have been proposed to increase data transmission reliability at the price of bandwidth expansion due to high channel code rates. This is because multimedia files are large in size (in Megabytes), therefore, high...
ABSTRACT This dissertation intends to present various fading problems affecting particularly wireless signal transmission over water and over thick forest and analyze its underlying principles in communication network. The dissertation also investigates various techniques used in practice to mitigate effects of fading over the said terrains. The dissertation is motivated by the fact that mobile companies, Airtel Network in particular, still suffer from fading in their transmission networks de...
Abstract In this study, sodium cyanide leaching technology has been used to recover gold from tailings that are used by Mawelo small scale miners, located in Chunya district, Mbeya region, Tanzania. The sample collected was sent for analysis of mineralogical composition and average particle size. The fractions retained on each sieve, which ranged 180 – 500 μm were used in the leaching experiments. The leaching was implemented using sodium cyanide with concentration in the range of 500 – ...
ABSTRACT Magnetic induction (MI) is a physical layer technology that is effective for underground wireless communications. The underground communications involve three major communication links, namely underground to underground (UG2UG), underground to aboveground (UG2AG), and aboveground to underground (AG2UG). AG2UG and UG2AG links are special in a sense that they cross two different media, which are soil and free space. While this is the case, the soil electrical conductivity (EC) is prove...
ABSTRACT Teachers‟ Professional Development refers to a variety of activities both formal and informal, which is designed for a personal and professional growth for teachers. The advancement of technology has been recognized to play a valuable role in developing and improving the teaching and learning situations. This study, aims at analyzing the use of ICT in Teachers‟ professional among the Tanzanian Secondary School teachers. Data used in this study, were collected through a field data...
ABSTRACT Free Space Optics communications (FSO) has drawn a bunch of attention for a range of applications in telecommunications field. The unregulated bandwidth which is up to 200THz, security, higher speed, unlimited data rate, low deployment cost, and shortest installation time frame are the few reasons to employ FSO system. However, weather attenuation has a massive impact on the FSO transmission channel. In this study, the effect of scintillation on the performance and FSO link availabil...
ABSTRACT Non edible oil sources have the potential to lower the cost of biodiesel. However, they usually contain significant high amounts of free fatty acids (FFA) that make them inadequate for direct base catalyzed transesterification reaction (where the FFA content should be lower than 3%). The present work reviews chemical re-esterification as a possible method for the pre-treatment of high FFA feedstock for biodiesel production. The effects of temperature, amount of glycerol, type and amo...