Research Articles: Recent submissions

Now showing items 1-20 of 231

Application of attainable region technique to optimize copper slag’s desired size class

Gabasiane, Tlotlo, Solomon; Danha, Gwiranai; Mamvura, Tirivaviri; Mashifana, Tebogo; Sibanda, Vusumuzi (MDPI, Basel, Switzerland, 2022-12-23)

Copper slag is a hard material produced from smelting copper-bearing ores. Over the years, research has prioritized utilizing slag as a secondary source of base metals. This paper focuses on the grinding/milling of copper ...
Undergraduate students’ motivation towards the use of electronic resources at Federal College of Education (Technical) Gombe, Nigeria

Liman, Yakubu, Attahiru; Rasegojwa, Maleshane, Gladys; Muhammad, Jika Saidu (Credence Press Limited, 2022-03-09)

The purpose of this study is to examine undergraduate students’ motivation towards the use of electronic resources at Federal College of Education (Technical), Gombe. The objectives of the study include: to determine the ...
Analysis and optimization of auto-correlation based frequency offset estimation

Ngebani, I.M.; Chuma, Joseph Monamati; Masupe, S. (South Africa Institute of Electrical Engineers, 2015-09)

In this letter, a general auto-correlation based frequency offset estimation (FOE) algorithm is analyzed. An approximate closed-form expression for the Mean Square Error (MSE) of the FOE is obtained, and it is proved that, ...
A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis

Wafula, Henry; Juma, Albert; Sakwa, Thomas; Musembi, Robinson; Simiyu, Justus (2016-07-22)

Surface photovoltage (SPV) spectroscopy is a powerful tool for studying electronic defects on semiconductor surfaces, at interfaces, and in bulk for a wide range of materials. Undoped and Cobalt-doped TiO 2 (CTO) thin films ...
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 ...
A concealed based approach for secure transmission in advanced metering infrastructure

Kebotogetse, Otisitswe; Samikannu, Ravi; Yahya, Abid (Institute of Electrical and Electronics Engineers (IEEE), 2022-08-17)

The smart grid has an important subsystem known as the Advanced Metering Infrastructure (AMI), responsible for measuring customer consumption of electricity. The AMI subsystem has smart meters as one of the components and ...
Terrestrial free space optical communication systems availability based on meteorological visibility data for South Africa

Kolawole, Olabamidele O.; Afullo, Thomas J.O.; Mosalaosi, Modisa (South African Institute of Electrical Engineers (SAIEE Africa Research Journal), 2022-03)

In spite of the numerous advantages of employing free space optical (FSO) communication systems as viable complementary platforms for next-generation networks, the presence of atmospheric disturbances such as fog and ...
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 ...
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 ...
Power quality improvement in solar fed cascaded multilevel inverter with output voltage regulation techniques

Stonier, Albert Alexander; Murugesan, Srinivasan; Samikannu, Ravi; Venkatachary, Sampath Kumar; Kumar, Senthil S.; Arumugam, Prakash (Institute of Electrical and Electronics Engineers (IEEE), 2020-09-29)

The presence of harmonics in solar Photo Voltaic (PV) energy conversion system results in deterioration of power quality. To address such issue, this paper aims to investigate the elimination of harmonics in a solar fed ...
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 ...
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 ...
Carbonate-silicate inclusions in garnet as evidence for a carbonate-bearing source for fluids in leucocratic granitoids associated with granulites of the Southern Marginal Zone, Limpopo Complex, South Africa

Safonov, O.G.; Mityaev, A.S.; Yapaskurt, V.O.; Belyanin, G.A.; Elburg, M.; Rajesh, H.M.; Golunova, M.A.; Shcherbakov, V.D.; Butvina, V.G.; van Reenen, D.D.; Smit, C.A. (Elsevier B.V., 2020-01)

We present a study of carbonate-bearing polyphase inclusions in garnets from leucocratic granitoids intruding metapelitic granulites of the Southern Marginal Zone (SMZ) of the Neoarchean Limpopo high-grade complex, South ...
Metallo-Drugs as promising antibacterial agents and their modes of action

Nareetsile, Florence; Matshwele, James T.P; Odisitse, Sebusi (Sami Publishing Company, 2022-05)

Antibiotic resistance has been a growing worldwide public health issue. The World Health Organization (WHO) has stated that the search for new antibiotics is slow, while antibiotic resistance is growing. WHO has also ...
Synthesis, characterization of nitro or amino substituted pyridyl ligands bridged by an ester or ether bond, and their antibacterial assessment against drug resistant bacteria

Matshwele, James J P; Jongman, Mosimanegape; Koobotse, Moses; Mazimba, Ofentse; Mapolelo, Daphne; Nkwe, David; Nareetsile, Florence; Odisitse, Sebusi (Elsevier B.V., 2022-06-09)

A series of ester and ether bridged compounds bearing the nitro and amino moieties were synthesized and characterized, in order to assess their ability to potentially serve as antibacterial agents against drug resistant ...
Spatiotemporal changes in mean and extreme climate: Farmers’ perception and its agricultural implications in Awash river basin, Ethiopia

Damtew, Addisu; Teferi, Ermias; Ongoma, Victor; Mumo, Richard; Esayas, Befikadu (Multidisciplinary Digital Publishing Institute(MDPI), 2022-06-20)

The increase in the intensity and frequency of climate extremes threatens socioeconomic development. This study examines variability of mean and extreme climate, farmers’ perception of the changes, and impacts in the Awash ...
Explicating factors that explain condom use intention among in-school adolescents in Botswana: a structural equation modelling approach

Mpeta, Kolentino N; Moroke, Ntebogang D; Gabaitiri, Lesego (Taylor & Francis group, 2021-11-17)

Knowledge with respect to adolescents’ intentions to engage in protective sexual behaviours is still deficient in numerous countries around the world, particularly in Sub-Saharan Africa (SSA) where HIV prevalence is the ...
Acceptance rate and risk perception towards the COVID-19 vaccine in Botswana

Tlale, Lebapotswe B; Gabaitiri, Lesego; Totolo, Lorato K; Smith, Gomolemo; Puswane-Katse, Orapeleng; Ramonna, Eunice; Mothowaeng, Basego; Tlhakanelo, John; Masupe, Tiny; Rankgoane-Pono, Goabaone; Irige, John; Mafa, Faith; Kolane, Samuel (Public Library of Science, 2022-02-04)

The COVID-19 disease burden continues to be high worldwide and vaccines continue to be developed to help combat the pandemic. Acceptance and risk perception for COVID-19 vaccines is unknown in Botswana despite the government's ...
The type II Topp-Leone-G power series distribution with applications on bladder cancer

Makubate, Boikanyo; Oluyede, Broderick; Matsuokwane, Marang Pearl; Gabaitiri, Lesego; Chamunorwa, Simbarashe (Nigerian Society of Physical Sciences, 2022-08-15)

Statistical distributions are important in modeling the real life of an item and therefore proper distributions that provide useful information for sound conclusions and decisions are needed. For that reason, the demand ...
Approximating fixed points of the composition of two resolvent operators

Boikanyo, Oganeditse (House of the Book of Science, 2017)

Let A and B be maximal monotone operators defined on a real Hilbert space H, and let Fix, (eqution found) and μ is a given positive number. [H. H. Bauschke, P. L. Combettes and S. Reich, The asymptotic behavior of the ...

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