ABSTRACT The purpose of this study was to assess Rural-ICT Service Providers (RISP) and agropastoralists interface. Specifically, the study aimed to get a better understanding of structures and processes at the interface and their implications for sustainable agropastoral livelihoods. The study was undertaken in Morogoro and Mwanza Regions where two districts with RISP were purposively chosen. The study adopted a combination of cross-sectional and case study designs. Purposive and random samp...
ABSTRACT GNU Radio is a software development toolkit that has traditionally been used by a community of specialized coders and advanced engineers for rapid prototyping and analysis of the physical layer. However, recently its potential as an educational tool is being debated and calls have been made to expand its applicability into this area. In this dissertation, the researcher responds by documenting how GNU Radio platform can be used to design a number of new practical demonstrations which...
ABSTRACT The factors that affect the colour yield of an acid dye on nylon fabric were investigated at a constant temperature of 500C, usingC.I. Acid Yellow 23,with citric acid and sodium chloride as auxiliaries. It was observed from the absorbance results that the colour yield of C.I. Acid Yellow 23 improved with increase in time of dyeing, while the absence or increase beyond 1% (acid) and 5% (salt) reduced the colour yield of the acid dye on the nylon fabric. Also, at a constant dyeing ti...
ABSTRACT Experimental investigation of anaerobic digestion of the organic fraction of municipal solid waste (MSW) in an upflow bioreactor with central substrate dispenser (UBCSD) is presented. The UBCSD consists of two similar size bioreactors joined by a central substrate dispenser (CSD). The UBCSD is a component of an integrated system of bioreactors also containing the upflow anaerobic sludge blanket (UASB) reactor and the continuous stirred tank reactor (CSTR), assembled systematical...
ABSTRACT Road transport takes about 70% of the transportation systems in Tanzania. With the increasing number of vehicles and urbanization, the number of road accidents has been rising now and then leading to an increase in the number of casualties and deaths. Efforts must be made to make sure that the number of road accidents is reduced. Wireless technologies have come as a solution to such road safety and transport efficiency issues. Recently, the promise of wireless technologies to suppor...
ABSTRACT The Energy - Exergy based performance analysis of the Solid Adsorption Solar Refrigerator is presented. The system comprises the collector/generator/adsorber, the condenser and the evaporator. It utilizes activated carbon/methanol as its adsorbent/adsorbate working combination. The exergy performance analysis of this refrigerator involves detailed assessment of all the following sub-processes that make up the refrigeration cycle, which are isosteric heat-up phase, desorption phas...
Abstract Exposure to CO (carbon monoxide) during cooking in households using LPG (liquefied petroleum gas), natural gas and charcoal as fuels has been conducted. The study aimed at assessing the indoor air quality in order to address potential hazards associated with CO. Carbon monoxide concentrations and flame temperature were measured at an interval of 1 min for 1 h using CO and thermometer data loggers respectively. While the CO concentration from LPG and natural gas were found below 26 p...
ABSTRACT The telecommunications industry in Africa has exhibited tremendous development since the turn of the century. This study analyzes production efficiency changes in the African telecommunications industry in the period 2000 to 2009. Furthermore, an attempt is made to assess the determinants for such efficiency changes. The results show that the industry has improved its productivity levels. However, most of the productivity growth is resulted from technological advancement and less fr...
Abstract With Mobile IPv6 (MIPv6) protocol support, mobile hosts can move from their home networks or one network to another without interrupting ongoing session. In MIPv6 network, packets from CN to MN undergo rectangular routing owing to long delay and tunneling overhead that affect the performance of mobile network. Furthermore, during handover process packet loss due to MN mobility is high which eventually hinder the performance of real application such as video conference, VoIP. Route o...
ABSTRACT LTE-Advanced is the winning technology approved by International Telecommunications Union (ITU) as a 4G mobile communication system. It is an evolution of LTE and backward compatible with LTE because they both use the same air-interface technologies such as OFDMA and MIMO. To meet the challenge of growing bandwidth demand by indoor users, femtocell is the technology suggested in LTE-Advanced. Users have the capability of expanding their capacity by buying and self installing these m...
ABSTRACT The study aimed at investigating and proposing the effective measures of using Central Equipment Identity Register to mitigate mobile phone theft over Airtel network operator as a case study in Tanzania. The study was conducted in Mbeya municipal. The study employed purposive sampling technique. Ninety respondents were involved where, eighty seven Airtel customers were selected randomly who live in Mbeya municipal and three key informants from Airtel (two site engineers and one netw...
ABSTRACT In the present work, STAR-CCM+ CFD code was used to investigate steady state thermal hydraulic parameters in the core of Ghana Research Reactor-1 (GHARR-1). The core was segmented into 21 axial segments. 3D-CAD parametric solid modeler embedded in STARCCM+ was used to model the geometry. The geometry was discretized by the use of appropriate meshing models. GHARR-1 operating conditions were set as boundary conditions for the STAR-CCM+ simulation conducted. Heat flux specific to indi...
ABSTRACT Broadband Power-Line Communication (BPLC) is a technology which has drawn attention to researchers in the field of digital communication. Using this technology there is no need of new installation which is advantageous compared to other technologies. However, due to noises and multipath fading in BPLC systems, studies on coding techniques and suitable modulation schemes are unavoidable. Studies by other researchers have shown that multicarrier modulation techniques perform better tha...
Abstract Co-digestion of various wastes and biomass feedstock has been shown to improve the digestibility of the materials and biogas yield. In this study, the co-digestion of water hyacinth and fish waste was studied at different mixing proportions. The anaerobic digestion was carried out in batch digester reactors sized 500 ml and were charged to 10 % of total vol-ume. Co-digestion was conducted for a retention period of 21 days in mesophilic temperature ranging 25.3 °C to 33.4 °C. The re...
ABSTRACT Analysis on spectral distribution of beat to beat (RR intervals) in Electrocardiography (ECG) signal became an important tool in biomedical signal processing for studying heart rate variability (HRV). Heart signals allow for a comprehensive analysis of the heart. Electrocardiography uses electrodes to measure the electrical activity of the heart. Extracting ECG signals is a non invasive process that opens the door to new possibilities for the application of advanced signals processin...