IFIP Advances in Information and Communication Technology
Feasibility study is the first and important stage in any planning of introducing a new solution ... more Feasibility study is the first and important stage in any planning of introducing a new solution for overcoming existing challenges. It saves a lot of resources that could be lost if such solution fails to solve the intended problem. On the other hand, it gives a proper way to go ahead with the plan of introducing the solution. The purpose of this study is to establish necessary and basic requirements as possibilities and pitfalls for deploying cost effective interactive multimedia content for enhancing an ineffective provision life skills education at primary school level in Tanzania. Ten primary schools were randomly selected and surveyed from which 65 teachers and 407 pupils participated in the study. Questionnaires, interviews, and documentary reviews were used as data collection tools. It was found that the Internet penetration is 45% of the population with 82.6% of Internet users are smartphones users. Number of computers and tablets at schools are still limited to 1:1036 computer pupils ratio, 96% of pupils had access of computers and smartphones from parents. Moreover, 77% of teachers used conventional and lecturing style in teaching, 100% of life skills content was static found in inadequate textbooks. Based on these results, deployment of self-learning enabled interactive multimedia content is possible and will bring positive impact if it will be developed to operate in ICT devices available in both primary schools and pupils' parents as well. This study informs the proper way of introducing cost-effective interactive multimedia content at primary school level in Tanzania.
Handbook of Research on Educational Technology Integration and Active Learning, 2015
Many higher education institutions in sub-Saharan Africa have been blending traditional face-to-f... more Many higher education institutions in sub-Saharan Africa have been blending traditional face-to-face delivery with various Information and Communication Technologies (ICT) to meet the strong demand for higher education as well as to improve the quality of traditional campus programs. Despite the increased adoption of various forms of blended learning in the region, the cost of acquiring and managing ICT infrastructure remained to be the biggest challenge. While cloud computing can provide powerful computing at a fraction of the cost of traditional ICT infrastructure, its potential to enhance blended learning in higher education in sub-Saharan Africa is unexplored. This chapter proposes deployment and adoption strategy of cloud computing to enhance blended learning services in the region. This work contributes towards helping higher education in sub-Saharan Africa to understand cloud services and to make plans for successful migration of computing services into cloud.
1 Abstract–This paper presents the development of a mechanism for the authorization and monitorin... more 1 Abstract–This paper presents the development of a mechanism for the authorization and monitoring of data for a web based e-learning system. System data as well as the different user groups accessing the data have been defined. Constraints to use the LAMP solution stack, the UML models are coded in PHP which is embedded in the HTML. These interfaces are used as doorways through which different users, as per their role, can access and work on the system data according to their clearance. On the other hand, the administrator can see different reports, from system logs by simply pressing a button.
Fourth IEEE International Workshop on Technology for Education in Developing Countries (TEDC'06), 2006
ABSTRACT The asynchronous network (Asynch-NET) provided by mobile access point (MAP) in the commu... more ABSTRACT The asynchronous network (Asynch-NET) provided by mobile access point (MAP) in the community of rural areas of developing countries has proved success in many regions of the developing countries. This asynchronous network is the footstep for e-services implementation in the communities with low-income and low population density. Basically, the cost of implementing a conventional "always-on" link in the rural areas of developing countries is very high that does not attract investors to put effort on. The paper presents a technique that is applied to the Asynch-NET framework so as to provide "the always-on" e-services at the similar operating cost of Asynch-NET
ABSTRACT This paper describes the design and implementation of an integrated circuit for a new op... more ABSTRACT This paper describes the design and implementation of an integrated circuit for a new optimum decoding algorithm for Manchester code. It is shown that the proposed algorithm is using the symmetrical properties of the Manchester code and provides 3 dB energy gain in comparison with the hard decision decoding. The decoder has been designed using a 2.4 μm CMOS technology and the implementation and performance results have been tested for a 10 Mbit/sec information rate which is similar to the Ethernet specification
he failure rates and lack of interest amongst students in science and mathematics in secondary sc... more he failure rates and lack of interest amongst students in science and mathematics in secondary schools in Tanzania is a serious problem. The Ministry of Education and Vocational Training (MoEVT) implemented the project to enhance and upgrade the pedagogical knowledge and subject content knowledge of teachers in selected difficult topics in science and mathematics at secondary education. This article reports on the process involved in the development of multimedia enhanced content that involved teachers, facilitators, and technical staff. The developed content was evaluated for its satisfaction using a sample of 72 experts that included teachers and instructors after using the content for 10 days. Generally, respondents were satisfied with the quality of the developed multimedia enhanced content. However, accuracy had minimum percentage of users’ satisfaction with 37%. This shows that the majority of the content had spelling and grammatical errors that were supposed to be corrected before producing the final product. Although this is ongoing work, we believe that the lessons learned from our efforts can be useful to similar organizations planning to develop multimedia enhanced content for educational purposes.
ABSTRACT The paper presents the process undergone to formulate three new undergraduate degree pro... more ABSTRACT The paper presents the process undergone to formulate three new undergraduate degree programmes in the Department of Electrical Engineering, University of Dar es Salaam. The new degree programmes are: B.Sc. in Computer Engineering and Information Technology, B.Sc. in Electrical Power Engineering, B.Sc. in Telecommunications Engineering. The three new degree programmes are in addition to the long time existing general B.Sc. in Engineering degree programme. The three new degree programmes have officially started in the 1999/2000 academic year as a result, the department is now offering a total of four degree programmes. The total enrollment of the department has increased from 49 students in the 1998/1999 academic year to 80 students in the 2000/2001 academic year. The new degree programmes have been formulated in response to the current and foreseeable future employment market demand for specialization coupled with the increase in the number of applicants who want to enroll for Electrical Engineering courses. At the same time, due to infancy level of industrial sector in the country, the old general degree programme has been retained. However, the curricula for the general electrical engineering programme has been revised so that to inject some more materials related to computers, electronics, telecommunications and microprocessors. The paper will narrate in detail the influx of market demand of engineers in the fields of Computers and Telecommunications which led to the formulation of the new degree programmes. Index Terms  new degree programmes, undergraduate degree programmes, old degree programme.
Abstract A new impedance transforming rat-race hybrid ring is realised by modifying an impedance ... more Abstract A new impedance transforming rat-race hybrid ring is realised by modifying an impedance transforming Wilkinson power divider. The performance characteristics have been computed for different impedance transformation ratios over a 100% bandwidth.
... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electr... more ... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electrical and Computer Systems Engineering University of Dar es salaam, PO ... From HT pole the cable is 50mmz, 20m long, AACSR to secondary substation (distribution transformer). ...
The paper presents the effects of branches on powerline networks performance using recent develop... more The paper presents the effects of branches on powerline networks performance using recent developed model. The channels segments which have been compared are access, indoor and medium voltage channels. The comparison was done by varying different load at one of the terminals. The relationship between signal level and number of branches has been established. Quadrature amplitude modulation (QAM) is applied to the access channel model and attainable bit error rate (BER) against SNR analyzed and compared with possible transmitted power. It is observed that BER degrade as number of branches increases and SNR of about 4 dB is needed to attain the original performance without a branch
ABSTRACT Power line channel is proposed as an alternative for broadband data transmission especia... more ABSTRACT Power line channel is proposed as an alternative for broadband data transmission especially in developing countries like Tanzania [1]. However the channel is affected by stochastic attenuation and deep notches which can lead to the limitation of channel capacity and achievable data rate. Various studies have characterized the channel without giving exactly the maximum performance and limitation in data transfer rate may be this is due to complexity of channel modeling being used. In this paper the channel performance of medium voltage, low voltage and indoor power line channel is presented. In the investigations orthogonal frequency division multiplexing (OFDM) with phase shift keying (PSK) as carrier modulation schemes is considered, for indoor, medium and low voltage channels with typical ten branches and also Golay coding is applied for medium voltage channel. From channels, frequency response deep notches are observed in various frequencies which can lead to reduce the achievable data rate. However, is observed that data rate up to 240Mbps is realized for a signal to noise ratio of about 50dB for indoor and low voltage channels, however for medium voltage a typical link with ten branches is affected by strong multipath and coding is required for feasible broadband data transfer.
Abstract An underground cable power transmission system is widely used in urban low-voltage power... more Abstract An underground cable power transmission system is widely used in urban low-voltage power distribution systems. In order to assess the performance of such distribution systems as a low-voltage broadband power-line communication (BPLC) channel, this ...
... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electr... more ... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electrical and Computer Systems Engineering University of Dar es salaam, PO ... From HT pole the cable is 50mmz, 20m long, AACSR to secondary substation (distribution transformer). ...
IFIP Advances in Information and Communication Technology
Feasibility study is the first and important stage in any planning of introducing a new solution ... more Feasibility study is the first and important stage in any planning of introducing a new solution for overcoming existing challenges. It saves a lot of resources that could be lost if such solution fails to solve the intended problem. On the other hand, it gives a proper way to go ahead with the plan of introducing the solution. The purpose of this study is to establish necessary and basic requirements as possibilities and pitfalls for deploying cost effective interactive multimedia content for enhancing an ineffective provision life skills education at primary school level in Tanzania. Ten primary schools were randomly selected and surveyed from which 65 teachers and 407 pupils participated in the study. Questionnaires, interviews, and documentary reviews were used as data collection tools. It was found that the Internet penetration is 45% of the population with 82.6% of Internet users are smartphones users. Number of computers and tablets at schools are still limited to 1:1036 computer pupils ratio, 96% of pupils had access of computers and smartphones from parents. Moreover, 77% of teachers used conventional and lecturing style in teaching, 100% of life skills content was static found in inadequate textbooks. Based on these results, deployment of self-learning enabled interactive multimedia content is possible and will bring positive impact if it will be developed to operate in ICT devices available in both primary schools and pupils' parents as well. This study informs the proper way of introducing cost-effective interactive multimedia content at primary school level in Tanzania.
Handbook of Research on Educational Technology Integration and Active Learning, 2015
Many higher education institutions in sub-Saharan Africa have been blending traditional face-to-f... more Many higher education institutions in sub-Saharan Africa have been blending traditional face-to-face delivery with various Information and Communication Technologies (ICT) to meet the strong demand for higher education as well as to improve the quality of traditional campus programs. Despite the increased adoption of various forms of blended learning in the region, the cost of acquiring and managing ICT infrastructure remained to be the biggest challenge. While cloud computing can provide powerful computing at a fraction of the cost of traditional ICT infrastructure, its potential to enhance blended learning in higher education in sub-Saharan Africa is unexplored. This chapter proposes deployment and adoption strategy of cloud computing to enhance blended learning services in the region. This work contributes towards helping higher education in sub-Saharan Africa to understand cloud services and to make plans for successful migration of computing services into cloud.
1 Abstract–This paper presents the development of a mechanism for the authorization and monitorin... more 1 Abstract–This paper presents the development of a mechanism for the authorization and monitoring of data for a web based e-learning system. System data as well as the different user groups accessing the data have been defined. Constraints to use the LAMP solution stack, the UML models are coded in PHP which is embedded in the HTML. These interfaces are used as doorways through which different users, as per their role, can access and work on the system data according to their clearance. On the other hand, the administrator can see different reports, from system logs by simply pressing a button.
Fourth IEEE International Workshop on Technology for Education in Developing Countries (TEDC'06), 2006
ABSTRACT The asynchronous network (Asynch-NET) provided by mobile access point (MAP) in the commu... more ABSTRACT The asynchronous network (Asynch-NET) provided by mobile access point (MAP) in the community of rural areas of developing countries has proved success in many regions of the developing countries. This asynchronous network is the footstep for e-services implementation in the communities with low-income and low population density. Basically, the cost of implementing a conventional "always-on" link in the rural areas of developing countries is very high that does not attract investors to put effort on. The paper presents a technique that is applied to the Asynch-NET framework so as to provide "the always-on" e-services at the similar operating cost of Asynch-NET
ABSTRACT This paper describes the design and implementation of an integrated circuit for a new op... more ABSTRACT This paper describes the design and implementation of an integrated circuit for a new optimum decoding algorithm for Manchester code. It is shown that the proposed algorithm is using the symmetrical properties of the Manchester code and provides 3 dB energy gain in comparison with the hard decision decoding. The decoder has been designed using a 2.4 μm CMOS technology and the implementation and performance results have been tested for a 10 Mbit/sec information rate which is similar to the Ethernet specification
he failure rates and lack of interest amongst students in science and mathematics in secondary sc... more he failure rates and lack of interest amongst students in science and mathematics in secondary schools in Tanzania is a serious problem. The Ministry of Education and Vocational Training (MoEVT) implemented the project to enhance and upgrade the pedagogical knowledge and subject content knowledge of teachers in selected difficult topics in science and mathematics at secondary education. This article reports on the process involved in the development of multimedia enhanced content that involved teachers, facilitators, and technical staff. The developed content was evaluated for its satisfaction using a sample of 72 experts that included teachers and instructors after using the content for 10 days. Generally, respondents were satisfied with the quality of the developed multimedia enhanced content. However, accuracy had minimum percentage of users’ satisfaction with 37%. This shows that the majority of the content had spelling and grammatical errors that were supposed to be corrected before producing the final product. Although this is ongoing work, we believe that the lessons learned from our efforts can be useful to similar organizations planning to develop multimedia enhanced content for educational purposes.
ABSTRACT The paper presents the process undergone to formulate three new undergraduate degree pro... more ABSTRACT The paper presents the process undergone to formulate three new undergraduate degree programmes in the Department of Electrical Engineering, University of Dar es Salaam. The new degree programmes are: B.Sc. in Computer Engineering and Information Technology, B.Sc. in Electrical Power Engineering, B.Sc. in Telecommunications Engineering. The three new degree programmes are in addition to the long time existing general B.Sc. in Engineering degree programme. The three new degree programmes have officially started in the 1999/2000 academic year as a result, the department is now offering a total of four degree programmes. The total enrollment of the department has increased from 49 students in the 1998/1999 academic year to 80 students in the 2000/2001 academic year. The new degree programmes have been formulated in response to the current and foreseeable future employment market demand for specialization coupled with the increase in the number of applicants who want to enroll for Electrical Engineering courses. At the same time, due to infancy level of industrial sector in the country, the old general degree programme has been retained. However, the curricula for the general electrical engineering programme has been revised so that to inject some more materials related to computers, electronics, telecommunications and microprocessors. The paper will narrate in detail the influx of market demand of engineers in the fields of Computers and Telecommunications which led to the formulation of the new degree programmes. Index Terms  new degree programmes, undergraduate degree programmes, old degree programme.
Abstract A new impedance transforming rat-race hybrid ring is realised by modifying an impedance ... more Abstract A new impedance transforming rat-race hybrid ring is realised by modifying an impedance transforming Wilkinson power divider. The performance characteristics have been computed for different impedance transformation ratios over a 100% bandwidth.
... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electr... more ... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electrical and Computer Systems Engineering University of Dar es salaam, PO ... From HT pole the cable is 50mmz, 20m long, AACSR to secondary substation (distribution transformer). ...
The paper presents the effects of branches on powerline networks performance using recent develop... more The paper presents the effects of branches on powerline networks performance using recent developed model. The channels segments which have been compared are access, indoor and medium voltage channels. The comparison was done by varying different load at one of the terminals. The relationship between signal level and number of branches has been established. Quadrature amplitude modulation (QAM) is applied to the access channel model and attainable bit error rate (BER) against SNR analyzed and compared with possible transmitted power. It is observed that BER degrade as number of branches increases and SNR of about 4 dB is needed to attain the original performance without a branch
ABSTRACT Power line channel is proposed as an alternative for broadband data transmission especia... more ABSTRACT Power line channel is proposed as an alternative for broadband data transmission especially in developing countries like Tanzania [1]. However the channel is affected by stochastic attenuation and deep notches which can lead to the limitation of channel capacity and achievable data rate. Various studies have characterized the channel without giving exactly the maximum performance and limitation in data transfer rate may be this is due to complexity of channel modeling being used. In this paper the channel performance of medium voltage, low voltage and indoor power line channel is presented. In the investigations orthogonal frequency division multiplexing (OFDM) with phase shift keying (PSK) as carrier modulation schemes is considered, for indoor, medium and low voltage channels with typical ten branches and also Golay coding is applied for medium voltage channel. From channels, frequency response deep notches are observed in various frequencies which can lead to reduce the achievable data rate. However, is observed that data rate up to 240Mbps is realized for a signal to noise ratio of about 50dB for indoor and low voltage channels, however for medium voltage a typical link with ten branches is affected by strong multipath and coding is required for feasible broadband data transfer.
Abstract An underground cable power transmission system is widely used in urban low-voltage power... more Abstract An underground cable power transmission system is widely used in urban low-voltage power distribution systems. In order to assess the performance of such distribution systems as a low-voltage broadband power-line communication (BPLC) channel, this ...
... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electr... more ... Anatory and Nerey .H. Mvungi Department of Computer and Systems Engineering Faculty of Electrical and Computer Systems Engineering University of Dar es salaam, PO ... From HT pole the cable is 50mmz, 20m long, AACSR to secondary substation (distribution transformer). ...
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