scholarly journals High speed internet development in Africa using 4G-LTE technology-a review

2019 ◽  
Vol 8 (2) ◽  
pp. 577-585
Author(s):  
Mohamed Njikam ◽  
Nanna S. ◽  
Shahrin S. ◽  
Mohd Fairuz Iskandar Othman
Keyword(s):  
High Speed ◽  
Telecommunication Networks ◽  
African Continent ◽  
African Countries ◽  
Lte Networks ◽  
Telecommunication Infrastructure ◽  
Long Time ◽  
Populated Region ◽  
4G Lte ◽  
Internet Development

The African continent is ranked second most populated region and has a huge amount of natural resources to be locally transformed or outsourced overseas. The traditional telecommunications system has helped connect people and enabled them to manage their businesses and trading in Africa for a long-time; many African countries have embarked early in changing their network and technology systems during the first years of the information age. Over a few decades ago, the introduction of new telecommunication methods and techniques have influenced much of African countries’ growth via different perspectives. The situation has triggered an enormous interest in people. They analyzed the factors supporting such changes, which in the case of this paper is all about the advent and adoption of LTE/4G-LTE technologies including its service commercialization in Africa. This review article attempts to provide an overview of 4G-LTE networks technologies and the internet; it includes the current evolution of telecommunication networks within and even beyond the African continent, assisted by the 4G-LTE expansion. An extended view is provided throughout this article’s development with respect to what could be expected (or is missing) for the sake of this continent’s telecommunication infrastructure enhancement and a better QoS to Africa’s dwellers.

Determinants influencing inbound arrivals to Africa

2018 ◽  
Vol 25 (6) ◽  
pp. 856-883 ◽  
Author(s):  
Armand Viljoen ◽  
Andrea Saayman ◽  
Melville Saayman
Keyword(s):  
Developed Countries ◽  
African Continent ◽  
African Countries ◽  
Dynamic Panel ◽  
Geographical Factors ◽  
Telecommunication Infrastructure ◽  
Foreign Tourism ◽  
Tourism Arrivals

The goal of this research was to investigate the determinants that influence foreign tourism arrivals to the African continent, firstly as a collective and secondly in different regions, with the aim to foster a greater understanding of how African countries and regions can grow their tourism economies. Using static and dynamic panel estimators, two key findings were identified from this research: (1) tourism to the continent is influenced by income in developed countries, prices, telecommunication infrastructure and geographical factors as well as conservation efforts and (2) the regions in Africa do not all react the same to changes in these factors.

scholarly journals A Novel HWRR-SJF Scheduling Algorithm for Optimal Performance Improvement in LTE System

2019 ◽  
Vol 1 (1) ◽  
pp. 1-8
Author(s):  
Pradeep S
Keyword(s):  
High Speed ◽  
Packet Scheduling ◽  
Performance Metrics ◽  
Scheduling Algorithm ◽  
Packet Delay ◽  
Mobile Internet ◽  
High Data ◽  
Long Time ◽  
4G Lte ◽  
Digital Dividend

In currently, the revolution in a high-speed broadband network is the requirement and also endless demand for high data rate and mobility. To achieve above requirement, the 3rd Generation Partnership Project (3GPP) has been established the Long Time Evolution (LTE). LTE has established an improved LTE radio interface named LTE-Advanced (LTE-A) and it is a promising technology for providing broadband, mobile Internet access. But, better Quality of Service (QoS) to provide for customers is the main issue in LTE-A. To reduce the above issue, the packets should be utilized by using one of the most significant function of packet scheduling to upgrading system performance via determines the throughput performance. In existing scheme, the user with poor Channel Quality Indicator (CQI) has smaller throughput issue is not focused. In this paper, a Hybrid Weighted Round Robin with Shortest Job First (HWRR-SJF) Scheduling technique is proposed to enhance efficient throughput and fairness in LTE system for stationary and mobile users. In this proposed scheduling, to schedule users according to a different criterion like fairness and CQI. HWRR-SJF Scheduling has been proposed for scheduling of the users and it produces increased throughput for various SNR values simulated alongside Pedestrian and Vehicular moving models. The proposed method also uses a 4G-LTE filter or Digital Dividend (DD) in order to align the incoming signal. The digital dividend is used to remove white spaces, which refer to frequencies assigned to a broadcasting service but not used locally. The proposed model is very effective for users in terms of the performance metrics like packet loss, throughput, packet delay, spectral efficiency, fairness and it has been verified through MATLAB simulations.

scholarly journals High speed internet development in Africa using 4G-LTE technology-a review

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Mohamed Njikam ◽  
Nanna S. ◽  
Shahrin S. ◽  
Mohd Fairuz Iskandar Othman
Keyword(s):  
High Speed ◽  
4G Lte ◽  
Internet Development

At Nature's Edge

2018 ◽  
Keyword(s):  
Human Impacts ◽  
Military Bases ◽  
East African ◽  
African Countries ◽  
The Road ◽  
European Experience ◽  
The Everyday ◽  
Long Time ◽  
The Indian Ocean ◽  
The Many

In an epoch when environmental issues make the headlines, this is a work that goes beyond the everyday. Ecologies as diverse as the Himalayas and the Indian Ocean coast, the Negev desert and the former military bases of Vietnam, or the Namib desert and the east African savannah all have in common a long-time human presence and the many ways people have modified nature. With research in six Asian and African countries, the authors come together to ask how and why human impacts on nature have grown in scale and pace from a long pre-history. The chapters in this volume illumine specific patterns and responses across time, going beyond an overt centring of the European experience. The tapestry of life and the human reshaping of environments evoke both concern and hope, making it vital to understand when, why, and how we came to this particular turn in the road. Eschewing easy labels and questioning eurocentrism in today’s climate vocabulary, this is a volume that will stimulate rethinking among scholars and citizens alike.

scholarly journals Ultracompact and low-power-consumption silicon thermo-optic switch for high-speed data

Nanophotonics ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 937-945
Author(s):  
Ruihuan Zhang ◽  
Yu He ◽  
Yong Zhang ◽  
Shaohua An ◽  
Qingming Zhu ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
High Speed ◽  
High Performance ◽  
Pulse Amplitude ◽  
Telecommunication Networks ◽  
Low Power Consumption ◽  
Power Efficient ◽  
High Speed Data ◽  
On Chip

AbstractUltracompact and low-power-consumption optical switches are desired for high-performance telecommunication networks and data centers. Here, we demonstrate an on-chip power-efficient 2 × 2 thermo-optic switch unit by using a suspended photonic crystal nanobeam structure. A submilliwatt switching power of 0.15 mW is obtained with a tuning efficiency of 7.71 nm/mW in a compact footprint of 60 μm × 16 μm. The bandwidth of the switch is properly designed for a four-level pulse amplitude modulation signal with a 124 Gb/s raw data rate. To the best of our knowledge, the proposed switch is the most power-efficient resonator-based thermo-optic switch unit with the highest tuning efficiency and data ever reported.

scholarly journals Modelling COVID-19 transmission in Africa: countrywise projections of total and severe infections under different lockdown scenarios

BMJ Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. e044149
Author(s):  
Isabel Frost ◽  
Jessica Craig ◽  
Gilbert Osena ◽  
Stephanie Hauck ◽  
Erta Kalanxhi ◽  
...  
Keyword(s):  
Vulnerable Populations ◽  
Compartmental Model ◽  
African Continent ◽  
Economic Costs ◽  
African Countries ◽  
Exponential Increase ◽  
Progression Of Disease ◽  
Severe Infections ◽  
Potential Impact ◽  
Hiv Aids

ObjectivesAs of 13 January 2021, there have been 3 113 963 confirmed cases of SARS-CoV-2 and 74 619 deaths across the African continent. Despite relatively lower numbers of cases initially, many African countries are now experiencing an exponential increase in case numbers. Estimates of the progression of disease and potential impact of different interventions are needed to inform policymaking decisions. Herein, we model the possible trajectory of SARS-CoV-2 in 52 African countries under different intervention scenarios.DesignWe developed a compartmental model of SARS-CoV-2 transmission to estimate the COVID-19 case burden for all African countries while considering four scenarios: no intervention, moderate lockdown, hard lockdown and hard lockdown with continued restrictions once lockdown is lifted. We further analysed the potential impact of COVID-19 on vulnerable populations affected by HIV/AIDS and tuberculosis (TB).ResultsIn the absence of an intervention, the most populous countries had the highest peaks in active projected number of infections with Nigeria having an estimated 645 081 severe infections. The scenario with a hard lockdown and continued post-lockdown interventions to reduce transmission was the most efficacious strategy for delaying the time to the peak and reducing the number of cases. In South Africa, projected peak severe infections increase from 162 977 to 2 03 261, when vulnerable populations with HIV/AIDS and TB are included in the analysis.ConclusionThe COVID-19 pandemic is rapidly spreading across the African continent. Estimates of the potential impact of interventions and burden of disease are essential for policymakers to make evidence-based decisions on the distribution of limited resources and to balance the economic costs of interventions with the potential for saving lives.

Western Education and Rural Productivity in Tropical Africa

Africa ◽  
1962 ◽  
Vol 32 (4) ◽  
pp. 313-323 ◽  
Author(s):  
P. C. C. Evans
Keyword(s):  
Rural Life ◽  
Tropical Africa ◽  
African Countries ◽  
Western Education ◽  
Political Independence ◽  
White Collar Workers ◽  
Long Time ◽  
Complete Rejection ◽  
To Come ◽  
Opening Paragraph

Opening ParagraphFor many years British administrators and others concerned with the developing countries of tropical Africa have criticized Western-type schooling introduced there for what they believe to have been its bad effects on the life of rural peoples. They have complained that such schooling is prejudicial to rural life, since it produces a distaste for agriculture and leads to a drift from the land. They say it promotes in schoolchildren a desire to be clerks or white-collar workers and, because of their schooling, they develop a strong dislike for manual work and a reluctance to soil their hands with physical labour. They assert that these values inculcated by Western schooling lead finally to an almost complete rejection of rural life, a contempt for agriculture, and therefore to a decrease in rural productivity. Finally, they maintain that this is particularly serious in view of the fact that, as far as we can see at present, many African countries will have to depend on agriculture and the land for a long time to come, for it is only through such dependence that it seems likely that they will achieve economic viability which will be an important factor in making a success of political independence.

Optimizing power consumption of mobile devices for video streaming over 4G LTE networks

2017 ◽  
Vol 11 (5) ◽  
pp. 1101-1114 ◽  
Author(s):  
Jingyu Zhang ◽  
Zhi-Jie Wang ◽  
Zhe Quan ◽  
Jian Yin ◽  
Yuanyi Chen ◽  
...  
Keyword(s):  
Power Consumption ◽  
Mobile Devices ◽  
Video Streaming ◽  
Lte Networks ◽  
4G Lte ◽  
4G Lte Networks

Analysis of the Effect of Tilting Antenna on the Coverage Area of ??the 4G LTE Network (Case Study of Trenggalek District)

2019 ◽  
Vol 9 (4) ◽  
pp. 43-48
Author(s):  
Rizal Aji Istantowi
Keyword(s):  
Base Station ◽  
Base Stations ◽  
Optimal Conditions ◽  
Coverage Area ◽  
Lte Networks ◽  
Lte Network ◽  
Big Cities ◽  
4G Lte ◽  
4G Lte Networks

4G LTE networks in big cities are already well available. Meanwhile, on small to medium-sized cities, the 4G LTE network is not evenly distributed and maximized. This study chooses the variable tilting antenna to the coverage area, because in sending information from a base station using an antenna. The average RSRP value (dBm) of the existing base station in the calculation with a distance of 200 m is -122.90 dBm, a distance of 500 m is -136.79 dBm, and a distance of 1000 m -147.30 dBm. Meanwhile, in the simulation with a distance of 200 m of -108.22 dBm, a distance of 500 m of -121.81 dBm, and a distance of 1000 m of -132.69 dBm. The coverage area value of the existing base station in the calculation is 5.29%, while in the simulation it is 11.18%. The average RSRP value (dBm) at optimal conditions for calculations at a distance of 200 m is -80.13 dBm, at a distance of 500 m is -94.03 dBm and at a distance of 1000 m is -104.56 dBm. Meanwhile, the simulation at a distance of 200 m is -98.09 dBm, at a distance of 500 m is -112.79 dBm and at a distance of 1000 m is -123.31 dBm. The value of the coverage area for the calculation is 20.32%, while for the simulation it is 15.01%. The current need for base stations in Trenggalek District that has been met is 68%.

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