Master Dissertations

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Design of an in-home multicarrier broadband power line communication system for Tanzania homes
(The University of Dodoma, 2012) Victor, Crallet
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 observed that the maximum delay spread for such networks is 2μs, making the number of sub-channels for OFDM to be 512 with a cyclic prefix of 64 at a bandwidth of 16.5MHz. Bit error rate (BER) performance of the OFDM system under multipath effects was analysed based on the simulations of the four Tanzania indoor power-line networks at different load impedances with number of branches and branch length dictated by a particular home power-line network. It was observed that the performance of the OFDM system is affected by number of branches and load impedances. To maintain the bit error performance an average SNR per bit gain of 28dB is needed so that sustained communication is still available in all the four Tanzania indoor power-line networks. The OFDM system performance at the fixed load impedance within the same house was different indicating that the number of branches has the influence on the performance.
Performance evaluation of coding techniques in power-line communication channel
(The University of Dodoma, 2012) Mongi, Alex F
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 than single carrier modulation techniques in power-line channels. In this work multicarrier spread spectrum (MC-SS) has been adopted as a modulation scheme. This work has investigated the performance of channel coding in power-line channel. Due to their application in digital communication systems, the coding techniques considered in this work are BCH codes, Reed-Solomon codes, Convolution codes, Concatenated codes and the Low density parity check codes. The Generalized transmission line (TL) theory model developed by Anatory et al has been adopted. A typical power-line network found in Tanzania has been adopted and subjected to different coding techniques in a typical noise environment. It has been found that the coding gain of 16dB, 10dB, 6.5dB, 5.5dB and 4.5dB have been realized using LDPC, RS, Concatenated, Convolution and BCH codes respectively at BER of 10-6. This implies that LDPC is appropriate coding technique for BPLC systems.
The impact of network outage on value added services: a case study of M-Pesa in Ilala municipal in Dar es Salaam
(The University of Dodoma, 2012) Leonard, Stanley
The study was aimed at assessing the impact of network outage on the Value Added Services (VAS) particularly Mobile-Pesa (M-Pesa) among other (VAS) offered by Vodacom network operator in Tanzania. The study was conducted in Ilala municipal in Dar es Salaam Tanzania. The basic parameters used to assess the network availability were Mean Time To Repair (MTTR), Call Setup Success Rate (CSSR) and Total User Outage Time (TUOT). The parameters like the time to get response from the operator, the time to accomplish one successfully M-Pesa transaction and the number of call attempts managed to make a successful call for M-Pesa were also used to measure the customer level of satisfaction on the M-Pesa service. The structured questionnaire given to 150 M-Pesa customers and agents as well as five key informants (two network engineers, two site engineers and one switching official) were used to obtain the information for this study. Observation was used to asses the quality of service (QoS) of Vodacom network in delivering M-Pesa to the customers. The study has found that M-Pesa customers’ satisfaction was moderate. The QoS on VAS like other service was bellow the recommended level by Tanzania communication QoS regulation of 2011. None of the respondents in all locations involved in the study were satisfied at the stipulated level of service quality. Furthermore the study found that the Vodacom network outage greatly contributes to loss to the operator and to the customers. The results also show that, the Vodacom network is characterized with much busy hours and congestions something which degrades the accessibility of the offered services like MPesa. The Vodacom network operator was advised to reduce the restoration period after failure and to increase the capacity of network so as to sustain more customers and the offered services like M-Pesa.
Assessment of the suitable modulation scheme for broadband power line communication system
(The University of Dodoma, 2012) Chuwa, Maria G
In Power line communication the information are sent via electrical power lines. The power lines are characterized by multipath fading and frequency selectivity due to impedance mismatch of the channel and impulsive noise. Therefore there should be a way to increase performance of the system. In this dissertation OFDM and MCSS modulation techniques were used to enhance PLC system performance. Bit Error Rate (BER) performance of OFDM and MCSS was analyzed and system efficiency was enhanced by the application of coding techniques. The performance of these modulation techniques were also analyzed with different loads’ impedances. The performance of the system was assessed by the commonly used Bit Error Rate against Signal to Noise Ratio (SNR) diagrams and the comparison of OFDM and MCSS systems was assessed by using the frequency response obtained from the PLC multipath channel model for different number of paths. For both coded and uncoded systems it was observed that at low load impedances the performance of MCSS was much better at higher signal to noise ratio than that of OFDM by a gain of 4dB. But at lower SNR OFDM had a better BER performance compared to MCSS. Additionally in the case of high load impedances the performance of OFDM was better than that of MCSS for systems with a gain of 12dB.
Improving road safety and transport efficiency using cellular networks in Tanzania
(The University of Dodoma, 2012) Ngeze, Lucian V
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 support vehicular communications and hence improving road safety has led to much research work. Integrating traffic information from traffic unit into cellular networks and finally broadcasting the information to road users can help increase road safety. Simulations using North Chiang Tung University Network Simulator (NCTUns) show that using cellular networks at a particular point to broadcast traffic information to road users can increase road safety. This dissertation discusses the causes of road accidents, the different wireless technologies that are commonly used in vehicular communications to increase road safety and improve transport efficiency and finally describes the model that can be used to provide traffic information. It focuses on the use of cellular networks based on mobile phones to provide road traffic information to road users.
Automation of electric power supply systems: TANESCO case study
(The University of Dodoma, 2012) Joseph, Richard
An electric power system includes a generating subsystem, a transmission subsystem and a distribution subsystem. An electrical power network is larger and more complex so that, automation of power system is required to monitor and control an electrical power network. Automation of power system mean use of computer to collect data along power network, transferring data to a distribution control centre, displaying the data and carrying out analysis for control decision and improvement in system operation. Currently, TANESCO has feedback concerning the real-time (automatic system) operation at the level of the generation subsystem to high voltage level, but has no feedback concerning the real-time status of their networks at medium and low voltage level. Therefore, the use of automation system in TANESCO entire network will facilitate reduction of number of activities along electrical power network, number of staffs, operational costs and provide better service to consumers. This study was aimed to determine the concepts of automation of management of power systems from generation points to end users in which researcher included the challenges involved in automation of power systems. Also, researcher described communication systems identified for automation of power systems and monitoring systems of automation of power systems. Challenges involved in automation of power system were established in this study. Also, four communication systems (PLCs, Optical Fibers, Satellite Communications and Wireless Communications) for automation of power systems were identified but, two communication systems (PLCs and Optical fiber) were selected as most effective communication systems for automation of power systems. Monitoring tools such as ETAP software and PSS/E software were identified; PSS/E tool was selected because of its availability. With the aim of determining the concepts of automation of management of power systems, researcher conducted simulation using PSS/E tool and the parameters were used during simulation are power flow and short circuit condition. This study employed case study design; Studying different documents and Interview guide are the methods were used to collect data related to communication systems, monitoring tools and challenge involved in automation of power systems. It is recommended for utility company to use automation of power systems. The use of power system automation reduces numbers of activities, staffs and failure can be observed timely to effect action timely and this means that, makes quick fault detection, isolation, service restoration and therefore better services to consumers.
Fading issues in wireless communication systems: a case study of airtel Tanzania limited
(The University of Dodoma, 2012) Kayombo, Godfrey B
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 network engineer) were interviewed using a check list in appendix 2. The specific criterion for selecting respondents was base on, being Airtel customers who were living in Mbeya. The study found that most of Airtel respondents didn’t have any knowledge on how to access their mobile phone identity numbers (IMEI) and how to safeguard their mobile phone from theft. The researcher recommends an effective campaign for mobile operators to educate their customers on the usage of mobile phone security features. Customers’ knowledge on the IMEI will enable the operators to combat mobile phone theft. However, the study found that an effective way of reducing mobile phone thefts for mobile operators in Tanzania is by using the CEIR which will enable the blacklisting the IMEIs of all the reported stolen mobile phones and blocking their use in all mobile operators in Tanzania. The effectiveness of CEIR will depend upon a combination of a technical solution, active cooperation and the partnership of the local police or law enforcement agencies, and an effective campaign to educate the mobile handset users.
Performance evaluation of multiple access techniques for broadband power line communication systems
(The University of Dodoma, 2013) Shao, Bertha
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 cost of laying cables and building the necessary infrastructure to every house is too high, BPL can serve to cut down the costs by eliminating the need for laying new infrastructure. A multiple access scheme of the MAC layer establishes a method of dividing the transmission resource into accessible sections. Multiple access techniques divide up to the total signaling resource into channels and then assign these channels to different users. The most common ways to divide up the transmission medium are along the time, frequency and/or code axes. In this research FDMA and TDMA are the two multiple access schemes which are taken into consideration. Their performances under different channel conditions have been found. The channel conditions considered are low, medium and high disturbances. It was found that TDMA performs better than FDMA under all these channel conditions.
Interference management in LTE femtocell system
(The University of Dodoma, 2013) Kawoya, Agnes
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 mini base stations in their office/home. They operate in the licensed spectrum as the traditional outdoor base stations (macrocell) installed by mobile operators. This introduces great cross-layer (femtocell-macrocell) interference. Distance between femtocell and macrocell and split spectrum between femtocell and macrocell can be studied to mitigate interference. This dissertation investigates the mentioned distance with different levels of spectrum splitting on throughput so as determine if an algorithm that matches distance to level of split spectrum can be designed. The investigation was done using a simulator. LTE-Sim simulator was used to implement different scenarios which portray the environments to be tested. Contrary to the researcher’s initial expectation, it was shown that in an environment with both macrocell users and femtocell users, the network throughput is independent on distance. On the other hand, in the scenario where macrocell users were ignored, there was a clear relationship between distance, splitting of spectrum and network throughput. It was shown that when the femtocell is given 20% of the bandwidth, it has the highest throughput for all simulated distances.
Investigation of public exposure to radiated EMF from cellular base stations: a case of Dodoma urban
(The University of Dodoma, 2013) Elias, Eduard
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 International Commission on Non-Ionizing Radiation Protection (ICNIRP). The researcher used questionnaires and field measurement methods to obtain both qualitative and quantitative data required in the study. The questionnaire results revealed that there is much of concern from the public on the EMF health effect caused by living near cellular mobile phones. Then measurements of RF EME emission levels from cellular Base stations in six sensitive Dodoma urban locations using the frequency selective Narda 3006 equipment were conducted. The results clearly demonstrate that the RF EME emissions from cellular base stations are several orders of magnitude below the maximum permitted limit contrary to the public perception. For example the maximum Electric field strength obtained was 4.0210V/m or 6.59 % of the limit for the general public exposure given by ICNIRP guidelines. This level shows that the people living closer to BTS are safe from health hazards which may be caused by EMF exposure.
Performance analysis of ZIGBEE/IEEE 802.15.4 standard for wireless body area network
(The University of Dodoma, 2013) Philemon, Emmanuel
Recently, in most of the developing countries like Tanzania, life expectancy and the inherent costs of caring for an aging population are increasing. These have put an enormous demand on the health care systems and have driven the advancement of technology-based sensor devices that can remotely monitor key vital life signs. These advancements enabled proliferation of wireless sensor networks. These sensor networks are capable of monitoring and controlling environments remotely, thereby reducing the workload of medical care. Body area networks (BAN) have revolutionized the remote patient monitoring system. Sensors implanted in the body collect the vital life sign data and report any anomaly to a physician via wireless technology. In this dissertation, a performance study of zigBee/IEEE 802.15.4 standard for BAN was done through simulation using OPNET Modeler based on three zigBee network topology formations (cluster, mesh and star). Analysis of these topologies in various scenarios was done to compare them based on different performance metrics including throughput, data traffic sent, data traffic received, load and end-to-end. Simulation results show that the zigBee/IEEE 802.15.4 has better throughput and network usage when cluster topology is used compared to star and mesh topologies. Similarly its traffic sent, traffic received, load and end –to-end delay were better than other two topologies. Hence cluster topology can be used with efficiency in WBAN for patient vital signs monitoring.
Comparative analysis on reception of digital video broadcast-terrestrial: A case study of Arusha city
(The University of Dodoma, 2014) Iddi, Ibrahim
Tanzania has been among the earliest countries in Africa to employ Digital Video Broadcast-Terrestrial (DVB-T) System. The deadline for Analogue Switch Off (ASO) was set to be in 2015, but Tanzania decided to have phased switch off since 2010. DVB-T is a new system in Tanzania and hence the extent of quality of the signal needs to be established. This research compares the reception of DVB-T second generation spatial signal strength as offered by Star Media Limited, Agape Associates Limited and Basic Transmission Limited multiplexing companies in five locations of the Arusha City. The research involved two phases, first was field measurement of DVB-T signals using four different antennas and a spectrum analyzer, and secondly, customers perception on quality of the signal they receive was established using a guided interview. Measurements have shown that overall DVB-T signal strength was quiet strong in Arusha city centre, which allows spectrum analyzer to have a set point of - 10 dBm. In other areas, overall DVB-T signal strength was weak which forced to have the spectrum analyzer set point lowered to -30 dBm. The research also found all of the Digitek and Agape decoder customers were satisfied with the quality of DVBT signal they were receiving. 9 out of 10 customers of Continental decoders and 4 out of 5 Tanzania Broadcast Corporation (TBC) decoders were also satisfied with quality of signal as offered by their MUXs. Research results recommend to Multiplexers to either increase power of their existing towers in allowable ranges or to increase number of towers to strengthen signal reception in remote areas and areas in low altitude. Gap filler can be employed in town to those areas obstructed by high rise structures.
Determining factors contributing to slow adoption of district health information system application programme on health services in Tanzania case of: Chamwino district.
(The University of Dodoma, 2014) Kulanga, Victor Methusela
This study entitled “Determining factors contributing to slow adoption of District Health Information System Application programme on health services in Tanzania” was conducted in Chamwino District Dodoma region. Specifically, the study was done at Buigiri, Iringa Mvumi, Chamwino, Haneti, Handali and Mpwayungu health centers were selected. Results from this study indicated that; the impact of DHIS Application programme on health services in Tanzania is increasing. The contents of this report offer powerful insight facts, strategies, tools and tips that can be used as a basis for impact assessment to the continuous development of organizations, management and practitioners. The recommendations suggests to reframe the problem in health sector rather than management as one of overcoming DHIS impact application programme to take a purposeful action, rather than adopting from the management. Moreover, doctors and nurses should improve the delivery of DHIS services, greater co-ordination of activities within organizations and improvements in administrative efficiency. Having said the above, Government must introduce a modernized statutory definition towards improving health sector strategically, because heath sector and administrative efficient are interdependent to each other. The conclusion made in this study relies on the research findings. The government to introduce new professional ideal resource design available to the regional and national evidence on the impact of DHIS application programmes on health services in Tanzania rather than depend on donor’s initiatives policy context.
Assessing the impact of lack of network documentation in higher learning institutions: Case of University of Dodoma
(The University of Dodoma, 2014) Kachemela, Seif J
Network complexity continues to grow as enterprises add and remove different communication technologies. Software tools that identify network elements, provide logical and physical network views, track network changes, and provide accurate documentation for all network components which are needed and should be employed in the organizations. It has been observed that most of the Higher Learning Institutions (HLIs) in Tanzania facing serious problems in monitoring and managing network because of neglecting documentation. This study intended to assess the impact of lack of network documentation in Higher Learning Institutions in Tanzania. Specific objectives were; to identify factors that contribute to negligence of network documentation in HLIs, to identify the effects of lack of network documentation in HLIs and to develop a prototype that will be adopted in higher learning institutions to document network. Methods used in data collection were in depth interviews and observations. The study population comprised of system administrators from the University of Dodoma. Purposive sampling was employed to get the sample size of 22 system administrators. The researcher discovered that awareness and negligence are among the factors which contributed to the lack of network documentation in HLIs. In addition, researcher found out that troubleshooting and managing network without network documentation is difficult. Finally the researcher develops prototype and use NetBrain Workstation to document UDOM network.
Development of support vector machine model for prediction of students’ dropout in Higher Learning Institutions: a case of the University of Dodoma
(The University of Dodoma, 2015) Mdenye, Rose Manfred
Students’ dropout from completing courses in higher learning institutions is a prevailing problem in Tanzania as in other countries. The intensity of the problem varies from one institution to another. Several measures have been taken by the institutions so as to reduce the number of students’ dropout. In this study, a support vector machine model is developed and tested in the prediction of the students’ dropout to help reduce the number of students dropping out of studies by predicting the risky students before they dropout. This study focused on the first year students who have a higher risk of the university dropout. In developing the model, opinion documents from students were collected in which the first year students gave out their opinions about their first year experience at the university. Also questionnaires were used to gather factors which contribute to students’ dropout. Based on the analyzed factors for dropout, the documents were labelled as risky or non-risky. The labelled documents were grouped into two groups which are the training and test documents. The model was developed using the training documents and was implemented using algorithms written in C++ and the SVM light package. Testing of the model was done using the test documents. Performance evaluation of the model was done to check the accuracy of the model in prediction of students’ dropout. The kernels used were the linear and polynomial kernel with different values of p and the radial basis function kernel with different values of gamma. The Radial Basis Function Kernel model outperformed the rest by recording an accuracy of 98.5% and the F score performance measure of 97.56%.
Using computer assisted instruction in improving learning of mathematics in Tanzania secondary schools
(The University of Dodoma, 2015) Mwalewela, Dativa
This study focuses on examining the use of computer assisted instruction model in improving learning of mathematics in Tanzania secondary schools. In particular the study assessed the capacity and the efficiency of using computer assisted instruction in learning of mathematics. Two secondary schools were used in this study namely:- St. Anthony's Secondary School and Kibasila Secondary School. Both of these schools are in Temeke District, Dar es salaam. The study comprised 40 students and 4 teachers from St. Anthony's Secondary School and 50 students and 3 teachers from Kibasila Secondary School. The study employs semi-structured interview, questionnaire and observation in collecting of data. Results show that, 100% of teachers and 84% of students respond that, it is possible to use computer assisted instruction model in teaching and learning of mathematics in secondary schools as the model was used. Interview and focus group discussion were used to collect students and teaches views on the viability of using computer assisted instruction for learning of mathematics. Observation was used to view the acceptability and effectiveness of the model to teachers and students. Both teachers and students indicated that computer assisted instruction model was very useful in improving teaching and learning of mathematics in secondary schools. If the model is adopted, positive impact on mathematics performance will be experienced.
Forecasting of stock market trends using a Decision Tree and Naïve Bayes hybrid model
(The University of Dodoma, 2015) Sanga, Bahati A.
Forecasting of stock market trends has been an area of great interest to researchers who are attempting to uncover the information hidden in the stock market data and to traders who wish to profit by trading stocks. An accurate forecasting of stock market trends may yield profits for investors. Forecasting of stock price trend is regarded as a challenging task. Due to the complexity of stock market data, development of efficient models for forecasting stock market trends is highly challenging. Applications of data mining techniques for stock market forecasting are an area of research which has been receiving a lot of attention recently. This study presents the development and evaluation of a decision tree and naïve Bayes hybrid model for stock market next day’s trend forecast in Dar-Es-Salaam Stock Exchange (DSE). Historical DSE data is used in the present study to extract features that can cause change in stocks price trends. In the developed hybrid model, decision tree is used to select the subsets of relevant features and naïve Bayes is used to produce a stable model for forecasting stock market trends. This study found that, the proposed hybrid model outperforms both the baseline decision tree and naïve Bayes models. It is found that features selection using decision tree employed in this study significantly improved the trend forecasting performance in stock market. It can be concluded from this study that, the decision tree and naïve Bayes hybrid model performs well and is reliable in stock market trend forecasting.
Development of a rule base grammar checker for Swahili language
(The University of Dodoma, 2015) Bamsi, Haji Idd
Grammar checker is a writing assistance tool developed for checking rules of the Natural Languages automatically. Every natural language has a set of rules which are used to guide users of that language. Swahili is one of the most widely spoken languages in the East African countries and specifically in Tanzania. Efforts have been made so far towards the development of the tool. However, to the best of our knowledge there is no assistance tool developed and reported for detecting the grammatical errors of Swahili sentences automatically. In this study, a rule based grammar checker prototype for Swahili language has been developed and tested. The system prototype has been developed using a rule based approach. In developing a grammar checker, Swahili texts were collected and analyzed. Then, a grammar rules were developed and tested using Transformation Based Learning (TBL) algorithm. The grammar checker prototype was designed into two modules; the first module detects spelling using Bayesian theory that finds the most likely spelling correction from the set of possible corrections, and the second module detects grammar errors that match the input text against the pre-defined grammar rules. The performance of the developed prototype was evaluated using precision and recall standard performance measures. Precision was used to present the ability of the prototype to detect grammar errors, while recall was used to test the ability of the prototype to reveal only relevant grammar errors. The system prototype achieves 71% recall and 76% precision. Therefore, the accuracy of the grammar checker prototype obtained was 73%.
ICT teaching and learning environment in teachers’ training: the case of diploma student-teachers in Tanzania
(The University of Dodoma, 2015) Mkinga, Ndengati Louis
State owned teachers‟ colleges in Tanzania have been teaching ICT to student-teachers in an environment that is more or less the same to all teachers‟ colleges. However, little is known about what exists in the ICT teaching and learning environment in the diploma teachers‟ colleges. This study assesses the ICT teaching and learning environment to see whether it matches the aims of introducing ICT to teacher training. The study used 280 respondents from five teachers‟ colleges. The data collected were analysed by using the statistical package, SPSS version 17. Findings indicated that 70% of the Internet connectivity in many teachers‟ colleges is poor. It cannot accommodate users‟ demand. Student-teachers‟ failure to get sufficient time to practice ICT skills in the computer lab due to insufficient number of computers in the lab and frequent power cuts that led to cancellation of practical sessions. The study concluded that ICT subject should be compulsory to all student-teachers and some improvements should be made in Internet connectivity, add more computers in the lab and review the ICT syllabus to cater the needs of the secondary school teachers.
Barriers on effective utilization of web2.0 technologies for knowledge sharing in Tanzania higher learning institutions
(The University of Dodoma, 2015) Ndaba, Alex Zakaria
Instructors of Higher Learning Institutions (HLI) are under increasing pressure to use ICTs to impart students with the knowledge, skills and attitude they need to compete academically in the twenty first century. Due to this fact, HLIs need to migrate from instructor-centered lecture based instructions to student-centered interactive learning environment. Despite the open nature of Web2.0 for e-learning initiatives and the increasing population of students interacting with the Web for accessing educational information, preliminary investigation and literature reviews have shown that instructors of HLIs in Tanzania are lagging behind on using these platforms for sharing knowledge with the students. This study attempt to investigate the barriers facing the adoption and utilization of Web2.0 technologies for knowledge sharing in Tanzania Higher Learning Institutions. The population of the study was the students and instructors of The University of Dodoma, St. Johns University of Tanzania and College of Business Education. Observation and questionnaires were used as research tools to collect data from 201 respondents who were proportionally selected. Quantitative data was analyzed using SPSS. Views of instructors and students towards utilization of Web2.0 for knowledge sharing were collected to constitute the qualitative data. The findings of this study showed that uncontrolled knowledge sharing, security, intellectual property rights lack of skills and privacy issues pertaining the use of Web2.0 for knowledge sharing are among the barriers towards effective utilization of Web2.0 technologies in Higher Learning Institutions. Also it was found that, while most of the instructors do not use Web2.0 for sharing their knowledge with students, most of the students of Higher Learning Institutions rely on search engines like Google in search of materials for their studies. Finally basing on vi study findings, the researcher develops a prototype that can serve as a platform for enhancing knowledge sharing in Tanzania Higher Learning Institutions.

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