Natural & Applied Sciences

Natural & Applied Sciences Research Papers/Topics

Botswana herbal tea quality assessmentt: antioxidant activity, proximate and metal content analysis of terminalia prunioides pods tea.

Abstract: Studies have linked herbal teas to the prevention of many diseases, leading to an increase in their use and demand which has endorsed an increase in their commercial activity and production. Consequently, performing a quality assessment of herbal teas in Botswana to determine their safety, medicinal and economical value has become of greater importance. The quality assessment tools used in this study entail: Antioxidant activity profiling using 2,2- diphenyl-1-picrylhydrazyl (D...

Mixtures of beta weibull G family of distributions and application

Abstract: Mixture models have gained popularity in statistical analyses because of their flexibility in cap turing local variations in heterogeneous populations. Model based approaches to classification use mixture models to fit data via maximum likelihood based approaches and provide labels to unlabelled observations. Over the years model based approaches have grown into an important sub-field of classification because they provide the uncertainty of classifying the unlabelled observations ...

Network Downtime in Government Department :an Investigation of this common Phenomenon with suggestion of best practices and best technologies

Abstract: Network downtime is the period in which a computer system is unavailable or system fails to provide/perform its primary functions. System reliability and/or availability are very Key as an unavailable system is a failing system. It is very common is Botswana for government clients to forfeit being serviced because the government department system is down. The primary aim of this project was to investigate the causes of system/network downtimes in Botswana government department. Thr...

A comparative study on the comminution behavior of diorite rocks

Abstract: In this article factors that affect the comminution behavior of heterogeneous diorite rocks obtained from two quarry locations in Botswana were investigated. Diorite rocks are in great abundance in Botswana and they are increasingly viewed as a relatively inexpensive and reliable alternative construction material to sustain the infrastructure growth in Botswana. The diorite rock samples collected from both the Central and North-Eastern districts were studied for structural similari...

A formal analytical modeling and simulation of wireless sensor home network

Abstract: 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 network is referred to as a wireless sensor home network (WSHN). In literature, the evaluation of customers' home wireless network performance level is usually done via real-time experiment or by experience to test the network’s performance, leading to networ...

Blockchain-based distributive auction for relay-assisted secure communications

Abstract: Physical layer security (PLS) is considered as a promising technique to prevent information eavesdropping in wireless systems. In this context, cooperative relaying has emerged as a robust solution for achieving PLS due to multipath diversity and relatively lower transmission power. However, relays or the relay operators in the practical environment are unwilling for service provisioning unless they are incentivized for their cost of services. Thus, it is required to jointly consid...

Development of an aflatoxin B1 specific molecularly imprinted solid phase extraction sorbent for the selective pre-concentration of toxic aflatoxin B1 from child weaning food, Tsabana

Abstract: In this thesis, the synthesis, optimization and application of a simple aflatoxin B1 (AFB1) specific extraction polymer sorbent based on molecular imprinting technology (MIT), for the selective pre-concentration of the potent AFB1 toxin from child weaning food, Tsabana manufactured in Serowe, Botswana is presented. As a food safety regulatory measure, the Tsabana must be cleared of the hazardous aflatoxins especially AFB1 before consumption as it is the most potent amongst those co...

Molecular dynamics study of 2,2′-difurylmethane with n-propanol and n-butanol binary liquid mixtures

Abstract: Liquid-liquid mixtures are ubiquitous in many natural and industrial processes. Their excess thermodynamic properties are governed by the intermolecular interactions. As such, experimental techniques such as neutron and x-ray diffractions, or computational chemistry methods can be used to probe structure at atomic level. However, they are rather scarce and expensive. Our interest is on the binary liquid mixtures involving 2,2′-difurylmethane (DFM) and n-alcohol, which have been s...

Data compression algorithms for wireless sensor networks: a review and comparison

Abstract: Energy consumption has risen to be a bottleneck in wireless sensor networks. This is caused by the challenges faced by these networks due to their tiny sensor nodes that have limited memory storage, small battery capacity, limited processing capability, and bandwidth. Data compression has been used to reduce energy consumption and improve network lifetime, as it reduces data size before it can be forwarded from the sensing node to the sink node in the network. In this paper, a surv...

Surveillance of antibiotic resistance determinants in Gaborone and Palapye wastewater treatment facilities

Abstract: Antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB) have been globally considered emerging environmental contaminants that pose a serious concern to human health and the ecosystem. The ubiquitous nature of ARB and ARGs among pathogens from wastewater effluents, indicate that wastewater treatment facilities are major reservoirs for antibiotic resistance determinants, thus contributing to the widespread dissemination of antibiotic resistance. The primary object...

Geology, mineralogy, geochemistry and alteration patterns of Banana zone copper-silver mineralisation , Ghanzi-Chobe belt, northwest-Botswana

Abstract: The Banana Zone Cu-Ag Prospect is within the SW-NE trending Ghanzi-Chobe Belt (GCB), which extends from the Namibia-Botswana border in the south to Shinamba Hills in the north near the Botswana-Zambia border. The Banana Zone is also part of the Ghanzi Project owned by Khoemacau Copper Mining and situated between the Ghanzi and Maun townships, in Botswana. The Banana Zone has inferred resource of over 225.4 million metric tonnes (Mt) grading 0.64% Cu and 8.1 g/t Ag. The GCB consists...

Biology of Bactrocera dorsalis (DIPTERA: TEPHRITIDAE): implications on population dynamics and pest management

Abstract: Fruit production is one of the fastest growing sectors in Botswana. As one of the agricultural sectors, fruit production is very crucial as it contributes immensely towards income generation and employment opportunities, especially for vulnerable rural livelihoods. Despite all the benefits, one of the biggest hurdles in the fruit production industry is disease and insect pests. Chief among these insect pests is the Bactrocera dorsalis (Hendel) (Diptera: Tephritidae). Bactrocera dor...

Heat Transfer Analysis of a Parabolic Trough Collector Prototype under Botswana`s Terrestrial Conditions

Abstract: Botswana has about 84 % of its land area as part of the semi-arid Kalahari desert and it experiences over 320 clear sky days per annum, with a solar insolation of 21 MJ/m2 per day on a horizontal flat surface. This favors energy generation using concentrated solar thermal technologies, especially parabolic trough collector (PTC). PTC is the most mature technology and contributes up to about 90 % of installed concentrated solar thermal power in the world. A PTC prototype was fabrica...

Security of quantum key distribution and quantum state sharing

Abstract: Quantum key distribution (QKD) and quantum secret sharing play a pivotal role in securing con dential information. QKD allows legitimate parties to create a cryptographic key which they can use to communicate privately without being intercepted by a malicious eavesdropper. QKD exploits the laws of quantum mechanics such as the Heisenberg uncertainty principle, the no cloning theorem and the principle of entanglement to detect any eavesdropper who tries to gain the knowledge of the ...

Photocatalytic and antibacterial properties of Ag/ZnO/NC nanocomposite

Abstract: Recently, organic and inorganic pollutants including heavy metals, effluents, dyes, and bacteria have been removed from wastewater and other environmental settings using nanomaterials. Combining two or more nanomaterials to form nanocomposites offers improved and tailored properties for these applications. Metal-polymer nanocomposite exhibit elevated optical, electrical, thermal and mechanical properties, which make them interesting candidates for the manufacturing of functional de...


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