Journal of ICT Systems最新文献

Location Privacy Protection and Coverage Hole Effects in Event Monitoring Wireless Networks for Internet of Things Applications 面向物联网应用的事件监测无线网络中的位置隐私保护和覆盖孔效应

Journal of ICT Systems Pub Date : 2023-11-29 DOI: 10.56279/jicts.v1i2.50

L. Mutalemwa

引用次数: 0

Impact of Trust Adjustment Factor on Artificial Intelligence Driven Collaborative Filtering Recommendation Algorithm 信任调整因子对人工智能驱动的协作过滤推荐算法的影响

Journal of ICT Systems Pub Date : 2023-11-15 DOI: 10.56279/jicts.v1i2.40

Edwin Ngwawe, E. Abade, Stephen Mburu

{"title":"Impact of Trust Adjustment Factor on Artificial Intelligence Driven Collaborative Filtering Recommendation Algorithm","authors":"Edwin Ngwawe, E. Abade, Stephen Mburu","doi":"10.56279/jicts.v1i2.40","DOIUrl":"https://doi.org/10.56279/jicts.v1i2.40","url":null,"abstract":"Trust on artificial intelligence (AI) is a major concern in the contemporary computing paradigms. Studies show that AI systems may outsmart humans, leading to an ultimate extinction of mankind. Therefore, the behavior of these systems must be controlled to avert potential use by bad actors. Recommender systems, which are variant of AI products, learn shoppers past data and predict items that shoppers may prefer. This helps in identifying items that may be recommended to the active user. Studies indicate that classical recommender systems allow untrustworthy data, tempting unscrupulous dealers to misdirect the learning process. This potentially defrauds buyers. This study introduces trust adjustment factor into the AI learning pipeline. We conducted experiments to test the difference in robustness of the trust-enhanced collaborative filtering recommendation algorithm against the classical counterpart. Prediction shift and hit ratios for the two sets of algorithms were measured when subjected to various forms of profile injection attacks. We found that the trust-enhanced variant of the algorithm significantly outperforms classical collaborative filtering recommendation in terms of robustness by up to 52% when measured by prediction shift and by up to 18% when measured by hit ratio. Confirmed by t-test, results suggest that embedding trust adjustment factor into recommender systems improves its robustness.","PeriodicalId":351687,"journal":{"name":"Journal of ICT Systems","volume":"25 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139273717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Analysis of Free Space Optical Communication under Scintillation Effect 闪烁效应下自由空间光通信性能分析

Journal of ICT Systems Pub Date : 2023-08-12 DOI: 10.56279/jicts.v1i1.33

G. Ulomi, Florence Rashidi, Edson Ndyalimo, Mustafa Mohsin

{"title":"Performance Analysis of Free Space Optical Communication under Scintillation Effect","authors":"G. Ulomi, Florence Rashidi, Edson Ndyalimo, Mustafa Mohsin","doi":"10.56279/jicts.v1i1.33","DOIUrl":"https://doi.org/10.56279/jicts.v1i1.33","url":null,"abstract":"Free-Space Optical communication (FSO) offers unregulated bandwidth of up to 200 THz, security, higher speed, unlimited data rate and shortest installation time. However, weather attenuation, especially scintillation, has a massive impact on the performance of the FSO transmission channel. This paper evaluates link availability and effect of scintillation on FSO performance in terms of eye diagrams, Bit Error Rate (BER), Q-factor, and signal-to noise ratio. Our work used data collected from January 2018 to December 2021 by Tanzania Meteorological Authority (TMA) in Mwanza and Arusha regions for link availability and performance analysis. Simulation was performed to determine the FSO link availability, and we analyzed the scintillation effect on FSO performance using Submarine Laser Communication II and Hufnagel Valley (HV) day prediction models. It is observed that the HV day model performs better in predicting scintillation intensity compared to the former. In both regions, for the same transmission power of 20 dBm, the signal quality is better for a distance of 6 km where the BER value is found to be 10-8. These results suggest that, to achieve high-speed data transmissions, the maximum separating distance between FSO transceivers should not exceed 6 km.","PeriodicalId":351687,"journal":{"name":"Journal of ICT Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125859067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Comparison between Massive MIMO Based Network and Conventional LTE Network for High Speed Broadband Connection in Rural Areas of Tanzania 坦桑尼亚农村高速宽带连接大规模MIMO网络与传统LTE网络性能比较

Journal of ICT Systems Pub Date : 2023-07-05 DOI: 10.56279/jicts.v1i1.31

Marko Mwalongo, Hassan Kilavo

{"title":"Performance Comparison between Massive MIMO Based Network and Conventional LTE Network for High Speed Broadband Connection in Rural Areas of Tanzania","authors":"Marko Mwalongo, Hassan Kilavo","doi":"10.56279/jicts.v1i1.31","DOIUrl":"https://doi.org/10.56279/jicts.v1i1.31","url":null,"abstract":"People in rural areas need high-speed broadband connection for various services, including e-governance, virtual class rooms, telemedicine, video-on-demand, and home entertainment. However, in order to provide broadband services, service providers must incur high deployment costs and should wait for a long time for return on investments. Long-Term Evolution (LTE) has been proposed to overcome high deployment cost, although this technology suffers from poor coverage in rural areas. Thus, massive Multiple-Input Multiple-Output (MIMO) with its favorable propagation phenomenon can be exploited as an alternative solution to boost signal coverage in rural areas. The current study compared the performance of broadband networks for Tanzanian rural areas based on massive MIMO technology and LTE. Performance comparison is confined to Reference Signal Received Power (RSRP), User Signal-Interference Noise Ratio (SINRu) and Downlink (DL) throughput metrics for 5 MHz, 10 MHz and 20 MHz channel bandwidths at 2.1 GHz and 700 MHz carrier frequencies. The results show that, in terms of RSRP and SINRu, the performance of massive MIMO network at 5 MHz is higher than that of conventional LTE networks at 10 MHz and 20 MHz. Massive MIMO network performs better at lower channel bandwidth, making it more suitable for deployment in rural areas.","PeriodicalId":351687,"journal":{"name":"Journal of ICT Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126963776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling Video Streaming Quality of Experience using Taguchi and Fuzzy Logic Methods 使用田口和模糊逻辑方法建模视频流体验质量

Journal of ICT Systems Pub Date : 2023-05-06 DOI: 10.56279/jicts.v1i1.22

Alex Mongi

引用次数: 0

Dinari: A Blockchain Lab for Supporting Blockchain Learning, Research, and Innovation in Tanzania Dinari:一个支持坦桑尼亚区块链学习、研究和创新的区块链实验室

Journal of ICT Systems Pub Date : 2023-05-04 DOI: 10.56279/jicts.v1i1.26

Anthony Kigombola, M. Mbise, Prosper Mafole

{"title":"Dinari: A Blockchain Lab for Supporting Blockchain Learning, Research, and Innovation in Tanzania","authors":"Anthony Kigombola, M. Mbise, Prosper Mafole","doi":"10.56279/jicts.v1i1.26","DOIUrl":"https://doi.org/10.56279/jicts.v1i1.26","url":null,"abstract":"Blockchains have caught the attention of governments, businesses, and researchers due to their potential to revolutionize the way data is stored and consumed. Despite the current interest in blockchains globally, there has been unsatisfactory progress of this promising technology in developing countries, including Tanzania. One factor hindering the advancement of blockchain in the country is the lack of knowledge of the technology itself. Challenged by the situation, this study implemented a blockchain lab to provide a platform for users to explore and practice various concepts of blockchain. This online lab, called Dinari, was implemented using Ethereum blockchain and was hosted on a cloud server. Experiments were conducted to verify the performance of the developed lab. Results from the experiment show that the platform gives an average transaction processing time of 15.17 seconds. The processing times were within an acceptable range of performance when compared with other online platforms, such as Mainnet and Kovan that provide average processing times of between 8.8 seconds and 18.3 seconds. The study can be scaled up in future to deploy more use cases, including health, in addition to the existing payment use case.","PeriodicalId":351687,"journal":{"name":"Journal of ICT Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127020207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STACK for interactive online numerical analysis tutorials: development, competence and performance STACK交互式在线数值分析教程:开发，能力和性能

Journal of ICT Systems Pub Date : 2023-04-24 DOI: 10.56279/jicts.v1i1.17

I. Amour

{"title":"STACK for interactive online numerical analysis tutorials: development, competence and performance","authors":"I. Amour","doi":"10.56279/jicts.v1i1.17","DOIUrl":"https://doi.org/10.56279/jicts.v1i1.17","url":null,"abstract":"Conducting tutorials for large classes requires number of manpower/venues. In this work we exploit the power of mathematics plugin (System for Teaching and Assessment using Computer Algebra Kernel - STACK) embedded within Moodle to conduct online tutorials for Numerical Analysis; undergraduate second year course taught in 2019/2020 and 2020/2021 academic years at theUniversity of Dar es Salaam. Varieties of randomized questions were authored to cover the content of the coursewhile testing different learning objectives exhausting direct and iterative computations, analytical and guided proofs. Students got feedback of their work immediately from their anticipated mistakes. Students' participation and engagement in the tutorials are promising. Final scores do not show any negative impact from the application of online tutorials. Handling of online tutorials is important as number of students enrolled every year is increasing disproportionally with the available teaching staffs. This can also be appropriate tool for both delivering mathematics content interactively and assessing mathematics learning when meetings between teachers and students are limited (e.g. during pandemic period) or not necessary (e.g. distance learning programmes).","PeriodicalId":351687,"journal":{"name":"Journal of ICT Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121220191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0