Kingsley A. Ogudo

University of Johannesburg | uj · Department of Electrical and Electronic Engineering Technology

This paper develops and discusses the predictability of power consumption of the Bitcoin networks using Artificial Neural Networks (ANN) machine learning algorithm and solving the computational problem of the Bitcoin mining process. It discussed its impacts on energy consumption in the crypto mining process. In this paper, we used data sets for Bit...

In this paper, we provide a new approach to modeling and analyzing the Goldfinger attacks in blockchain networks, based on the topology of a peer-to-peer network; this paper studied the impact of the Goldfinger well known as 51% attacks in the case of the ring, mesh and fully connected topology. The outcome of simulation has proven that in the case...

The tremendous growth of health-related digital information has transformed machine learning algorithms, allowing them to deliver more relevant information while remotely monitoring patients in modern telemedicine. However, patients with epilepsy are likely to die or have post-traumatic difficulties. As a result, early disease detection could be es...

Blockchain technology has gotten much interest recently from academics, industry, and governments worldwide. It is regarded as a technical innovation that can disrupt various application fields affecting many aspects of our lives. Cryptocurrencies are a public blockchain application's success story that sparked extensive research and development. S...

The need to design computing platforms with low water footprint and enhanced energy efficiency makes non-terrestrial computing platforms attractive. Large scale computing platforms in non-terrestrial environments are increasingly receiving attention. In this regard, underwater data centers (UDCs) are considered to have operational benefits due to t...

Communication protocols are part of supervisory control and data acquisition (SCADA) and they are used by the devices connected on the SCADA network. In this paper the distributed network protocol (DNP3) and International Electrotechnical Commission IEC 61850 communication protocols were modelled in OPNET. The simulation of DNP3 and IEC 61850 commu...

Underwater data acquisition entities acquire big data that are processed aboard terrestrial data centres. However, processing the big data aboard terrestrial computing entities involves high latency data transfer. In addition, the processing of data in a terrestrial environment is challenging when there is inadequate edge node capacity. These chall...

Within numerous IoT domains, recent IoT proliferation has influenced organizational activities and business procedures. The number of connected edge devices has increased dramatically, resulting in a vast stream of data that is prone to leakage and manipulation, decreasing the security level of the attacked IoT ecosystem. Anomaly detection systems...

Satellite mega-constellation networks aiming to provide high quality of service have a high number of ground stations and access high bandwidth millimetre wave frequencies with high susceptibility to rain tele-connections. Rain tele-connection induced attenuation cannot be mitigated via conventional site diversity. The use of multiple ground statio...

Computing platforms have a high water footprint that poses threat to biodiversity preservation. The high water footprint reduces water availability for habitat preservation. Hence, approaches that reduce the water footprint are needful. The presented research proposes an approach that reduces the need for water in future computing platforms. It pro...

Space applications play an important role in technological advancements. This is because satellites are useful in existing applications like earth observations and future computing (hosting space based data centres). In these applications, satellites increase the amount of space debris as they reach their end of life. Therefore, the reduction of sp...

In 5G systems, enhancing the energy efficiency (EE) and spectrum efficiency (SE) is a significant task that is capable of fulfilling the demand of future wireless networks and providing Quality of Service (QoS) provisioning, such as high throughput with low power consumption. In the present work, a look-up table enabled a fuzzy-based approach to in...

During Substation Maintenance a bay is taken out of service and tested and during testing traffic is generated on the Substation Communication Network. A model of a Substation Communication Network that is using IEC 61850 has been modeled on OPNET Riverbed Modeler. IEC 61850 provides interoperability between different vendors of the Intelligent Ele...

Data from sensor-bearing satellites requires processing aboard terrestrial data centres that use water for cooling at the expense of high data-transfer latency. The reliance of terrestrial data centres on water increases their water footprint and limits the availability of water for other applications. Therefore, data centres with low data-transfer...

In this paper Intelligent Electronic Devices (IED) that use ethernet for communicating with substation devices on the grid where modelled in OPNET. There is a need to test the communication protocol performance over the network. A model for the substation communication network was implemented in OPNET. This was done for ESKOM, which is the electric...

Advancements in the field of communications are moving towards the internet of things (IoTs). Wireless Sensor Networks (WSN) can be used to monitor environmental conditions such as pollution using independent sensors communicating with each other using the IoTs technology thereby leading to the design of an accurate environmental monitoring system....

Home automation is an intelligent, functional as a unit system that facilitates home processes without unnecessarily complicating the user’s life. Devices can be connected, which in turn connect and talk through a centralized control unit, which are accessible via mobile phones. These devices include lights, appliances, security systems, alarms and...

Data from sensor bearing satellites requires processing aboard terrestrial data centers that use water for cooling at the expense of high data transfer latency. The reliance of terrestrial data centers on water increases their water footprint and limits the availability of water for other applications. Therefore, data centers with low data transfer...

The Ocean provides benefits of free cooling for cloud computing platforms. However, the use of the ocean for hosting cloud platforms needs to consider three challenges. The first challenge is identifying suitable underwater locations for siting underwater data centres. The second is designing a low-cost method for acquiring underwater data centres....

This article develops and defines Blockchain technology in its classic format. New suggested proposed algorithms are then analyzed in order to introduce new and modified versions of Blockchain technology. After that, fundamental infrastructure is presented in order to represent its application in new generation of telecommunications. In addition, t...

This paper presents the design of a photovoltaic based power supply using a non-inverting buck-boost converter to charge batteries. The batteries can be used to power a load as backup power when there is no sunlight. This approach presents a constant output of 48 V charging voltage for the batteries even though the input voltage may vary depending...

With the advancement of new technologies, the number of connected devices, the amount of data generated, and the need to build an intelligently connected network of things to improve and enrich the human ecosystem open new doors to modifications and adaptations of current cellular network infrastructures. While more focus is given to low power wide...

A novel polysilicon light emitting device (LED) was realized in a standard complementary metal oxide semiconductor (CMOS) process that is based on a p-n junction reverse bias configuration. This LED can emit visible light based on the reverse bias p-n junctions in the dark. The central emitting doped structure element of this LED is n⁺-p-n⁺-p-n⁺ st...

In this paper, a Software Defined Network was created in Mininet using python script. An external interface was added in the form of an OpenDaylight controller to enable communication with the network outside of Mininet. The OpenDaylight controller was hosted on the Amazon Web Services elastic computing node. This controller is used as a control pl...

The paper propose an intelligent electronic control unit system implementation of smart home in rural areas, with the intention to control and monitor energy usage by household electrical appliances. Measurement, verification of power usage, and automated efficient use Solar power as substitute of primary power supply (Eskom power supply) in South...

Abstract—In order to keep a high revenue stream, Communication Service Providers in general, Network Mobile Operators specifically need to ensure a good level of customer satisfaction by assigning a big weight on the user’s Quality of Experience (QoE). With billions of transactions done by customers on both voice and data daily, Communication Servi...

Abstract—In order to keep a high revenue stream, Communication Service Providers in general, Network Mobile Operators specifically need to ensure a good level of customer satisfaction by assigning a big weight on the user’s Quality of Experience (QoE). With billions of transactions done by customers on both voice and data daily, Communication Servi...

Abstract—Network Operators are shifting their business interest towards Data services in a geometric progression manner, as Data services is becoming the major source of Telco revenue. The wide use of Data platforms; such as WhatsApp, Skype, Hangout and other Over the Top (OTT) voice applications over the traditional voice services is a clear indic...

Abstract— In this paper, Mininet-WiFi was used to simulate a Software Defined Network to demonstrate Mininet-WiFi’ s ability to be used as the Software Defined Network emulator which can also be integrated to the existing network using a Network Virtualized Function. A typical organization’s computer network was simulated which consisted of a websi...

In this paper, Mininet-WiFi was used to simulate a Software Defined Network to demonstrate Mininet-WiFi' s ability to be used as the Software Defined Network emulator which can also be integrated to the existing network using a Network Virtualized Function. A typical organization's computer network was simulated which consisted of a website hosted...

We propose a low cost full-silicon optical links utilizing 650 – 850 nm propagation wavelengths. The creation of large-scale opto-electronic integrated circuits and optical data “highways” inCMOS integrated circuitry, utilizing Si CMOS compounds, have been envisioned and hold much promise [1] - [3] The latest attempts for realizing optoelectronic s...

600-650 nm wavelengths optical emission have been stimulated in two junction monolithically integrated circuit p+np+ Injection-avalanche silicon light emitting devices. This has been achieved after extensive modeling of potential light emitting mechanisms that could stimulate light emission at these wavelengths. Substantial evidence has been achiev...

A monolithically integrated silicon light-emitting device with visible light emission (400–900 nm) is presented to realize sensing application in high frequency on the CMOS platform.

In this article, we discuss the emission of visible light (400–900 nm) by a monolithically integrated silicon p-n junction under reverse bias. Silicon light emitting devices (Si-LEDs) could be designed and realized utilizing the standard complementary metal oxide semiconductor (CMOS) technology. Increased electroluminescence from the three-terminal...

Silicon Photonics is an emerging field of research and technology, where nano-silicon can play a fundamental role. Visible light emitted from reverse-biased p-n junctions at highly localized regions, where avalanche breakdown occurs, can be used to realize a visible electro-optical sources in silicon by means of light-emitting diodes (Si-LEDs) is r...

Carrier energy and momentum engineering design concepts have been utilized to realize higher intensity, up to 200 nW.µm-2 in p+np+ Silicon Avalanche based LEDs (SiAvLEDs) in a silicon 0.35 micron RF bi-polar process. The spectral range is from 600 nm to 850 nm wavelength region. Best performance are up to 600nW vertical emission in a 3 micron squar...

In this paper, we describe the fabrication, using standard silicon processing techniques, of silicon light-emitting device that emit photons for future electro-optic silicon monolithic integration on the CMOS platform.

As a rapid growing field in worldwide science and technology, silicon nano-photonics has become one of the most promising photonics integration platforms in the last decade. This is mainly due to the combination of a very high index contrast and the availability of silicon complementary metal-oxide-semiconductor (CMOS) fabrication technology, which...

Si Avalanche based LEDs technology has been developed in the 650 -850nm wavelength regime 1, 2. Correspondingly, small micro-dimensioned detectors with pW/μm2 sensitivity have been developed for the same wavelength range utilizing Si-Ge detector technology with detection efficiencies of up to 0.85, and with a transition frequencies of up to 80 GHz...