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...
ABSTRACT Aeromagnetic data of Nsukka and Udi areas were analyzed qualitatively and quantitatively. The study was aimed at mapping mineral deposits in a sedimentary basin, delineating susceptibility of rocks in the area, dip, plunge and type of body causing the magnetic anomaly and their trends as well as estimating the depth to magnetic source bodies. Spectral Analysis, Source Parameter Imaging (SPI), and Forward and Inverse modelling methods were used in the quantitative interpretation...
Abstract Fingerprint emerged as an important system within the security agencies, government offices and court of law in the late 19th century, when it replaced anthropometric measurements as a more reliable method for identifying persons. No two fingerprints have ever been found identical in billions of human and automated computer comparisons. Fingerprint is thus claimed to outperform DNA and all other human identification systems. However, genetic mutation and effect of certain drugs have...
ABSTRACT The no-slip boundary condition at a solid-liquid interface is primarily to understanding fluid mechanics. However, this condition is an assumption that cannot be derived from first principles and could, in theory, be violated. In this work, we investigate numerically and theoretically the subject involving partial slip boundary conditions. The physical imagery that emerges is that of a complex behaviour at an unsteady hydromagnetic stretching solid interface, with stagnation point ...
ABSTRACT In this research, we investigated the deformation field near a crack tip due to thermal stress. Crack tip singularities are examined using a line integral that exhibits path independence of all contours near the tip of the crack in a two-dimensional deformation field of an elastic material. The approach of using the J- Integral is used to extract the magnitude of crack tip stress intensity factor for thermal stress crack problem. The characteristics of the J-integral in the presence...
Abstract In this paper, we present the k-analogues of some inequalities concerning the digamma function.
ABSTRACT The 22.5 km2 Kobada project which is located in the Kangaba Cercle of the Koulikouro region of Mali, is owned and operated by African Gold Group Inc. (AGG), a Canadian junior exploration company (Fig. 1.1 shows perimeter for 22.5 km2; fig. 1.9 shows perimeter for consolidated permit of 215 km2). Notably the permit hosts a soil anomaly greater than 500 ppm arsenic that extends over 12 km of strike length and one kilometre of width, which is offset to the west of extensive artisanal su...
ABSTRACT This study, undertaken during 1974 to 1977 in Volta Lake, investigated the identification, abundance and distribution, reproductive biology and weight-length relationships of four Chrysichthys species (C . a u ratus, C. walkeri, C. velifer and C. furcatus). The species were separated on basis of position of the dorsal fin, color of the barbels and the body and shape of the caudal fin and its lobes. Gill rakers also proved of some value. The Volta Lake, on the Volta River in Ghana, is...