The performance of an enterprise is determined by its strategic objectives, and the strategic plan it adopts through some form of strategic analysis in order to meet these objectives. However, strategic analysis is currently only supported through unsystematic and informal processes such as SWOT analysis and the Five Forces Model. This thesis proposes conceptual goal modeling as a systematic approach to strategic analysis and shows through a comparative study how this analysis can be conducte...
ABSTRACT The integrated study involving electrical resistivity method and physicochemical analysis of water samples was carried out to investigate the effect of dumpsite leachate on groundwater repositories around the dumpsites in Ikot Ekpene, Uyo and Eket Local Government Areas of Akwa Ibom State. A total of thirty-three (33) vertical electrical sounding (VES) employing Schlumberger electrode configuration and five profiles of electrical resistivity tomography (ERT) were carried out aro...
ABSTRACT The synthesis of five mono- and five bis-alkynylated derivatives of quinoline-5,8-diones is reported. The intermediate 6,7-dibromoquinoline-5,8-dione was obtained by nitrosation of 8- hydroxyquinoline, followed by reduction and subsequent bromination and oxidation. The coupling reaction of 6,7-dibromoquinoline-5,8-dione via palladium-catalyzed Sonogashira cross-coupling gave the alkynylated products. The chemical structures of the products were confirmed using spectroscopic methods ...
ABSTRACT The potentials of Adansonia digitata root (ADRP) and stem powders (ADSP) and the stem activated carbon (ADSAC) for adsorption of Pb2+, Cd2+, Cu2+ and Co2+ from aqueous solutions were investigated. The activated carbon was prepared via chemical activation using ZnCl2 as the activating agent. Physico-chemical analysis of the adsorbents (ADRP, ADSP and ADSAC) showed the moisture contents (< 20 %), volatile matter (9.2 - 11.2 %), ash content showed < 5.0 %, fixed carbon (68 - 81.0 %...
ABSTRACT Accurate meter readings, timely and correct bills have become an important aspect of water metering systems. Additionally, anomalies such as leakage and bursts in water pipelines have significant consequences to the environment and lead to financial constraints to the water companies. Since monitoring leakages and bursts in the water distribution networks, capturing accurate and dependable measurements for billing, troubleshooting and analysis is a challenging task, the need to deve...
Abstract Bush encroachment is a form of land degradation common predominantly in semi-arid areas of the world. The resulting habitat degradation and loss of resource productivity make bush encroachment a serious environmental and economic problem in Namibia. Despite these negative effects, bush encroachment offers potential woody carbon stock storage, which can render Namibia a net carbon sink. This study was, therefore, aimed at quantifying potential woody carbon stock storage from differen...
ABSTRACT The synthesis and characterization, spectroscopic, and biological studies of 2-acetylferrocenyl-4- phenylthiosemicarbazone, 2-acetylferrocenyl-4-methylthiosemicarbazone, 2-acetylpyridine-2- thiophenecarboxylsemicarbazone and 2-acetylferrocenyl-2-thiophenecarboxylsemicarbazone with copper(II) chloride are reported here. The ligands were synthesized by condensation reaction of appropriate carbonyl and amine compounds. The reactions were carried out in the presence of acetic acid. The ...
ABSTRACT This study examines exchange rate volatility with Generalised Autoregressive Conditional Heteroscedastic (GARCH) models using monthly exchange rate data from the bank of Ghana from January 1990 to November 2013. The data was converted to returns to enhance their statistical properties and the returns used to fit a mean equation. The ARCH LM test of the mean equation revealed the presence of conditional heteroscedasticity. The returns were therefore modeled using ARCH (3), GARCH (2,3)...
Abstract Governments and their agencies are often challenged by high cost and flexible telephonic and data services. Emerging technologies, such as those of Voice over Internet Protocol (VoIP) that allow convergent systems where voice and data networks can utilise the same network to provide both services, can be used to improve such services. However, these convergent networks are based on the classical (best-effort) characteristics that come with some weaknesses in respect of quality of se...
ABSTRACT The continuous production of antibodies with desired properties has become very important in fields, such as biomedical research and in medicine. Methods for making such useful antibodies include the hybridoma technology and Epstein-Barr virus (EBV) transformation of antibody- secreting cells (ASCs) to make them live longer in ex vivo culture. Transformed cells are then capable of multiplying rapidly over longer periods and producing large amounts of the desired antibodies. The aim ...
ABSTRACT There is speed limitation on hardware built on Weighted Number Systems (WNS) due to carry propagation. In recent years, attempts have been made to circumvent the speed limitation imposed on WNS in arithmetic operations by investigating into number systems such as Residue Number System (RNS) which has special carry characteristics for parallel computations. RNS is carry-free in nature and is able to support parallel and high speed arithmetic such as addition and multiplication. Overfl...
ABSTRACT This work is based on performance Analysis of DES and RSA suitability for different system applications. The rationale behind the work was to find out how suitable DES (Data Encryption Standard) and RSA (Rivest, Shamir and Adleman) are for different application systems under different systems requirements. In order to achieve these objectives, an application that implements DES and RSA was developed using an object-oriented analysis and design (OOAD) approach and was implemented in...
ABSTRACT Poverty amongst elderly persons is a phenomenon experienced worldwide, Namibia included. The government of Namibia has come up with various social safety nets programmes which include old age pension, disability grant and child maintenance grant to alleviate poverty. Although these interventions were introduced to reduce poverty among the targeted groups, statistics reveal that poverty still exists amongst those receiving old age pension. The aim of the study was to examine factors ...
Abstract In this short paper, the authors establish some inequalities involving the q and (q,k) deformed Gamma functions by employing some basic analytical techniques.
ABSTRACT Waste accumulation in developing world cities has become common sights in recent times. Management of solid waste has been one of the challenges facing urban areas in the world owing to an aggregation of human settlements and increased consumption thereof that has the potential to produce a large amount of solid waste. The situation is further compounded with the failure of some cities in setting up an effective waste collection system. The aim of this study is to develop an effect...