ABSTRACT Biogas production in third world countries is still un-optimized and produce very minimal outputs. Optimization of biogas quality by increasing the temperature of the bio-digester is quite technical. On the other hand, commercial enzymes used to increase biogas quantity are also expensive and substrate-specific. T. brownii and Acanthaceae spp. extracts were successfully used to hasten saccharification and fermentation of cellulose during the preparation of traditional alcohols. This ...
Abstract The study of duality properties of the spaces of analytic functions contin- ues to attract the attention of many mathematicians. Most studies have concentrated on the re exive Hardy and Bergman spaces both on the unit disk and the upper half-plane. For instance, Zhu, Peloso, among others have determined the duality properties of Hardy and Bergman spaces. For the non-re exive Bergman spaces of the disk, it was proved by Axler that the dual and the predual are identied as big and littl...
ABSTRACT Direction-of-arrival (DOA) estimation is an important branch in the field of array signal processing. It can be applied in such fields as wireless communication, sonar, radar, biomedicine, and radio detection. This fact together with the development of the geometries used in the past years is the principal motivation of this research project. Although various studies have focused on the uniform hexagonal array for direction finding, there is scanty use of the uniform hexagonal array ...
ABSTRACT Source direction-of-arrival estimation problem has received much attention in recent years following its significant role in array-signal processing and wide range of applications such as radar, wireless communication, sonar, seismology among others. Direction finding has been solved by several techniques such as Maximum likelihood estimator, MUltiple Signal Classification, Estimation of Parameters via Rotational Invariance Technique and Cram´er- Rao bound using array of sensors in ...
Abstract It is well known that in a nite ring with identity, every element is either a zero divisor or a unit. The classication of nite rings is not fully settled. Dierent studies have generated interesting results on certain classes of nite rings. It is worthwhile to note that completely primary nite rings have proved to be useful towards the classication of nite rings. This is due to the fact that a nite ring has a unique maximal ideal if and only if it is a full matrix ring over a complete...
Abstract Microtubules are hollow cylindrical protein structures found in all eukaryotic cells, and essential in several cellular processes, including cell motility, cell division, vesicle tra±ck- ing and maintenance of cell shape. The building block of microtubules, tubulin, is one of the proven targets for anticancer drugs. A microtubule exhibits a remarkable prop- erty, termed dynamic instability, in which it is able to switch stochastically between two distinct states. In one state, the m...
ABSTRACT Nigeria aspires for qualitative education as well as economic prosperity in the year 2010. It is envisaged that there will be a high level of technological sophistication by the twenty-first century world wide. In order not to be left behind there is need for Nigeria to take steps in ensuring high technological advancement as well as having sustainable economic growth. The important role that mathematics plays in science and technology has ensured its inclusion as a compulsory subje...
Abstract The performance in mathematics by students has persistently been poor. Students‘ attitudes towards mathematics have been a factor that is known to influence students‘ achievement in mathematics. The purpose of this study is to investigate the factors contributing to negative attitudes towards mathematics resulting in poor performance at O‘level and also establish the strategies that can be adopted to improve performance in mathematics by students in secondary schools in Kwekwe...
ABSTRACT This study which was conducted at Chifedza High School in Chivi District of Masvingo Province of Zimbabwe sought through a survey and quasi-experimental, to investigate the role of diagrams in problem-solving in Mathematics at form four level. The exploratory approach was chosen to guide the methodology of the study because of its pragmatic nature and ability to produce desired, practical, workable and more justifiable results. One secondary school in the district was visited for th...
ABSTRACT Let H be a real Hilbert space and K a nonempty, closed and convex subset of H. Let T : K ! K be an asymptotically nonexpansive map with a nonempty xed points set. Let fng1n =1 and ftng1 n=1 be real sequences in (0,1). Let fxng be a sequence generated from an arbitrary x0 2 K by yn = PK[(1 tn)xn]; n 0 xn+1 = (1 n)yn + nTnyn; n 0: where PK : H ! K is the metric projection. Under some appropriate mild conditions on fng1n =1 and ftng1 n=1, we prove that fxng converges strongly ...
ABSTRACT Steady-state problems in Engineering and Applied Science can be modelled in a way that requires the solution of differential or integro-different in equations, involving the Laplacian equation. Numerical procedures instead of variation and analytical tecniques) are often applied through the finite difference approximations among other techniques. In this research, the finite-difference expressions for two two, three and n-dimensional Laplacian operator based on linear, quadratic and ...
ABSTRACT This dissertation looked at the fertility rate, fertility pattern and some of the diseases that cause fertility problems which leads to pregnancy wastage and fertility differentials in women within the reproductive age using binary Logistic and Multiple regression. The result shows that the average Total Fertility Rate (TFR) of sample I, sample II and sample III are approximately five (5) children per woman, seven(7) children and six (6) children respectively. The histogram and ...
ABSTRACT This study focused on the teaching and learning of slow learners in mathematics at secondary school level in secondary and high schools in Gweru Urban District. The researcher's main objective was to find out how slow learners in mathematics are being assisted at secondary school levels, the challenges, if any, which are being faced by the teachers in assisting these slow learners as well as the slow learners' perspectives towards the assistance they are being given by their mathemat...
Abstract The laminar boundary layer flow in an exponentially stretching stenosed artery immersed in viscous and incompressible blood is investigated along with the effect of a chemical reaction. Many researchers have used mathematical modelling to predict blood flow through stenosed arteries. Pressure, shear stress and velocity are the parameters that have been analysed in the past. Not a lot of work has been done to highlight the effect of heat transfer on an exponentially stretching stenose...