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Now showing items 56-75 of 133

A formal analytical modeling and simulation of wireless sensor home network

Gaboitaolelwe, Jwaone; Zungeru, Adamu Murtala; Chuma, Joseph; Ditshego, Nonofo; Semong, Thabo (The Intelligent Networks and Systems Society, 2020-02-15)

Technological advances for low-cost Wi-Fi applications such as ‘the wireless sensor network (WSN) deployment’ are at an advanced stage of acceptance, especially in smart home environments. The application of this kind of ...
Fuzzy logic control for solar PV fed modular multilevel inverter towards marine water pumping applications

Stonier, Albert Alexander; Murugesan, Srinivasan; Samikannu, Ravi; Krishnamoorthy, Vinoth; Subburaj, Senthil Kumar; Chinnaraj, Gnanavel; Mani, Geetha (Institute of Electrical and Electronics Engineers (IEEE), 2021-06-28)

This paper presents the design and implementation of Modular Multilevel Inverter (MMI) to control the Induction Motor (IM) drive using intelligent techniques towards marine water pumping applications. The proposed inverter ...
Fuzzy model-based reconstruction of paleovegetation in Ethiopia

von Reumont, Frederik; Schäbitz, Frank; Asrat, Asfawossen (Informa UK Limited, trading as Taylor & Francis Group, 2022-05-31)

We introduce a new method to compute plant distribution in Ethiopia under paleoclimatic conditions using fuzzy logic. Using a published map of the potential vegetation for Ethiopia we decipher the boundary conditions for ...
Generation and composition of municipal solid waste: case study, extension 7, Palapye, Botswana

Letshwenyo, Moatlhodi Wise; Kgetseyamore, Dirang (Springer Nature Limited, 2020-09-10)

The rapid population growth and industrialisation has contributed to the production of large quantities of solid wastes that should be managed properly. This study was conducted to investigate the generation and composition ...
Household solid waste generation and composition: a case study in Palapye, Botswana

Dikole, Ronald; Letshwenyo, Moatlhodi Wise (Scientific Research Publishing Inc., 2020-02)

The purpose of this case study was to conduct a case study in the generation rate, composition, and characterise solid wastes from low, middle and high income households during weekdays and weekends in Palapye, Botswana. ...
Hydroclimate changes in eastern Africa over the past 200,000 years may have influenced early human dispersal

Schaebitz, Frank; Asrat, Asfawossen; Lamb, Henry F; Cohen, Andrew S; Foerster, Verena; Duesing, Walter; Kaboth-Bahr, Stefanie; Opitz, Stephan; Viehberg, Finn A; Vogelsang, Ralf; Dean, Jonathan; Leng, Melanie J; Junginger, Annett; Ramsey, Christopher Bronk; Chapot, Melissa S; Deino, Alan; Lane, Christine S; Roberts, Helen M; Vidal, Céline; Tiedemann, Ralph; Trauth, Martin H (Springer Nature Limited, 2021-06-14)

Reconstructions of climatic and environmental conditions can contribute to current debates about the factors that influenced early human dispersal within and beyond Africa. Here we analyse a 200,000-year multi-proxy ...
Hydrogeochemical evaluation of groundwater quality in Dukwi wellfield in Botswana

Diphofu, Abijah; Yendaw, Jerome A.; Suglo, Raymond S. (International Journal of Innovation Creativity and Change (herein referred to as ‘IJICC’), 2022)

There has been a decline in groundwater quality in most wellfields in Botswana. This study evaluated the groundwater quality in Dukwi Wellfield for drinking and irrigation purposes and characterised the dominant hydrochemical ...
Image compression techniques in wireless sensor networks: a survey and comparison

Lungisani, Bose A.; Lebekwe, Caspar K.; Zungeru, Adamu Murtala; Yahya, Abid (Institute of Electrical and Electronics Engineers (IEEE), 2022-08-10)

There is continuous intensive research on image compression techniques in wireless sensor networks (WSNs) in the literature. Some of the image compression techniques in WSNs that exist in the literature include discrete ...
Improving energy detection in cognitive radio systems using machine learning

Fajemilehin, Temitope O.; Yahya, Abid; Langat, Kibet (Engineering and Technology Publishing, 2020-01)

Research has shown that a huge portion of the electromagnetic spectrum is underutilized. Over the years, cognitive radio has been demonstrated as an efficient dynamic spectrum management technique. Energy detection is one ...
Influence of coal properties on coal conversion processes-coal carbonization, carbon fiber production, gasification and liquefaction technologies: a review

Keboletse, Kamogelo P.; Ntuli, Freeman; Oladijo, Oluseyi Philip (Springer Nature Switzerland AG., 2021-02-08)

Coal due to its relatively large quantities and wide distribution worldwide has generated renewed interest in research and development with the aim of establishing coal conversion technologies that are technically reliable, ...
Influence of nanocrystalline nickel powder on oxidation resistance of spark plasma sintered Ni-17Cr6.5Co1.2Mo6Al4W7.6Ta alloy

Babalola, Bukola Joseph; Maledi, Nthabiseng; Shongwe, Mxolisi Brendon; Bodunrin, Michael Oluwatosin; Obadele, Babatunde Abiodun; Olubambi, Peter Apata (Elsevier B.V. on behalf of King Saud University, 2020-03)

An investigation was carried out to evaluate the isothermal oxidation behavior of nickel based superalloys at 1100 °C for 120 h. The alloys which were microstructured and nanostructured were developed by spark plasma ...
Influence of pyrolyzed sludge use as an adsorbent in removal of selected trace metals from wastewater treatment

Matheri, Anthony Njuguna; Eloko, Nicelette Shako; Ntuli, Freeman; Ngila, Jane Catherine (Elsevier Ltd, 2020-09)

The disposal of sludge processes accounts for 60% of the total operation and 40% of total emissions of greenhouse gas from wastewater treatment plants operations. Moreover, sludge contains pathogenic microorganisms, organics, ...
Integrated and consolidated review of plastic waste management and bio-based biodegradable plastics: challenges and opportunities

Mazhandu, Zvanaka S.; Muzenda, Edison; Mamvura, Tirivaviri Augustine; Belaid, Mohamed; Nhubu, Trust (MDPI, 2020-10-12)

Cumulative plastic production worldwide skyrocketed from about 2 million tonnes in 1950 to 8.3 billion tonnes in 2015, with 6.3 billion tonnes (76%) ending up as waste. Of that waste, 79% is either in landfills or the ...
Inter cluster group management in wireless sensor networks

Rohini, R.; Zungeru, Adamu Murtala; Ravi, Samikannu; Rao, Dasari Narasimha (Science publications, 2018-04-19)

Wireless sensor networks (WSNs), an emerging large-scale network system can be embedded for any application. The designers of wireless sensor network have to consider the quality of service agreements from a user perspective. ...
Investigating the feasibility of using agricultural waste as an adsorbent of gold ions in small scale gold processing plants

Tapfuma, Anthony; Chakawa, Dennis Panashe; Moyo, Langa Bright; Hlabangana, Nkosikhona; Danha, Gwiranai; Muzenda, Edison (Elsevier B.V., 2019)

The recovery of precious metals like gold is increasing each day due to its high market prices along with diverse applications. Bio-sorption represents a biotechnological innovation as well as a cost effective and excellent ...
Investigation on impact of magnetic field on the corona discharge activity in Punga oil using fluorescent fiber and UHF sensor techniques

Murugesan, Srinivasan; Amalanathan, Arputhasamy Joseph; Sarathi, Ramanujam; Srinivasan, Balaji; Samikannu, Ravi (Institute of Electrical and Electronics Engineers (IEEE), 2021-09-16)

This paper reports the experimental investigation of the corona discharge activity of punga oil under the influence of a local magnetic field and different voltage profiles (AC and DC voltages) using fluorescent fiber ...
Isothermal oxidation performance of Laser Cladding Assisted with Preheat (LCAP) tribaloy T-800 composite coatings deposited on EN8

Nyadongo, Sipiwe Trinity; Pityana, Sisa Lesley; Olakanmi, Eyitayo Olatunde (MDPI (Basel.Switzerland), 2021-07-13)

It is anticipated that laser cladding assisted with preheat (LCAP)-deposited Tribaloy (T-800) composite coatings enhances resistance to structural degradation upon exposure to elevated-temperature oxidation service ...
Lateral crashworthiness response of bombyx mori fibre/glass–fibre/epoxy hybrid composite cylindrical tubes-experimental

Ude, Albert Uchenna; Azhari, Che Husna (AIMS Press, 2019-12)

Experimental studies were undertaken to investigate the effect of reinforced fibre hybridization on the crushing characteristics of quasi-static laterally compressed cylindrical composite tubes. Woven glass fibre (GF) and ...
LoRa network planning and deployment: a terrestrial navigation application

Kolobe, Lone; Lebekwe, Caspar K.; Sigweni, Boyce (IEEE, 2021-09-20)

Long Range (LoRa) is a popular low power wide area network (LPWAN) technology which operates in the Industrial, Scientiﬁc and Medical (ISM) frequency band transmitting information over ranges in excess of 20 km and 5 km ...
Manufacture of fly ash based coagulants for use in water treatment

Maila, Goitseone Baby; Ntuli, Freeman; Lekgoba, Tumeletso (: The Mattingley Publishing Co., Inc, 2020-01)

Fly ash was explored as a raw material for the production of three fly ash-based coagulants being raw, calcined and calcined– sodium hydroxide complex coagulants. Calcined fly ash and calcined fly ash – sodium hydroxide ...

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