http://hdl.handle.net/123456789/1371 2026-04-07T21:40:21Z 2026-04-07T21:40:21Z Anderson, Benjamin Buah-Bassuah, Paul K Tetteh, Jonathan P http://hdl.handle.net/123456789/6077 2021-09-08T13:58:40Z 2004-05-28T00:00:00Z

Using violet laser-induced chlorophyll fulorescence emission spectra for crop yield assessment of cowpea (Vigna unguiculata (L) Walp) varieties Anderson, Benjamin; Buah-Bassuah, Paul K; Tetteh, Jonathan P The use of violet laser-induced chlorophyll fuorescence (LICF) emission spectra to monitor the growth of fve varieties of cowpea in the University of Cape Coast Botanical Garden is presented. Radiation from a continuous-wave violet laser diode emitting at 396 nm through a fibre is closely incident on in vivo leaves of cowpea to excite chlorophyll fluorescence, which is detected by an integrated spectrometer with CCD readout. The chlorophyll fluorescence spectra with peaks at 683 and 731 nm were used for growth monitoring of the cowpea plants over three weeks and analyzed using Gaussian spectral functions with curve fitted parameters to determine the peak positions, area under the spectral curve and the intensity ratio F683/F731. The variation in the intensity ratio of the chlorophyll bands showed sensitive changes indicating the photosynthetic activity of the cowpea varieties. A discussion of the fluorescence result as compared to conventional assessment is presented with regard to discrimination between the cowpea varieties in terms of crop yield performance 12p:, ill.

2004-05-28T00:00:00Z Mireku, Kwame Mensah, Samuel http://hdl.handle.net/123456789/6076 2021-09-08T13:51:08Z 2014-05-22T00:00:00Z

The relationship between capital structure measures and financial performance: Evidence from Ghana Mireku, Kwame; Mensah, Samuel One of the areas that has been a focus of intense debate when it comes to capital structure research is whether to use the book value or market value of capital structure as the accurate measure of financial leverage (Salehi & Biglar, 2009). Various arguments have been raised in favour of which of the measures researcher should use in capital structure studies. However, much has not been done to determine which of the measures has a more significant relationship with financial performance. Therefore the thrust of this paper was to establish the relationship between capital structure measures and financial performance so to determine which of the capital structure measures has a stronger association with financial performance. Two definitions of capital structure measures (book value & market value) and six financial performance measures were used. For this study, fifteen companies on the Ghana Stock Exchange (GSE) were selected over a 6-year time period (2002–2007). The outcome of the study established that the capital structure of firms influences their performance. Many measures of firm performance were negatively correlated with financial leverage. Meaning, companies with less debt in Ghana have high profit margins and good financial performance. The study established that the market value of capital structure has a stronger relation with financial performance as compared to the book value. Researchers should therefore consider first, the use of market value in any studies on capital structure 10p:, ill.

2014-05-22T00:00:00Z Mensah, S Y Kangah, G K http://hdl.handle.net/123456789/6075 2021-09-08T12:55:18Z 1991-01-01T00:00:00Z

The thermoelectric effect in a semiconductor superlattice in a non-quantized electric field Mensah, S Y; Kangah, G K The thermoelccvic effect in a semiconductor rupcrlatlicc in a non-quantize delectric Beld is investigated for elections of the lowest muband in the Linear approamation of VT. nalytlcll expressionsfor the thermopower and the kat conductinty cocfficient are obtained as functions of the superlattice parsmeters A and d, temperature, concentration and electric field E. The results confirm the fact thar tepending on the relation berueen A and other characteristic energies of the carrier chdrge (kT, E and h/r) the camer charges cm behave either as a quasi-two-dimensional or as a three-dimensional electron gas. The prospect of using a superlanice as a good-quality and highly efficient thermoelement is also proposed 5p:, ill.

1991-01-01T00:00:00Z Amponsah, I.K. Vorsah Addo-Mensah, D. Anokye, M. Babah, R. Etsiwah, I. http://hdl.handle.net/123456789/6074 2021-09-08T12:47:42Z 2019-01-01T00:00:00Z

The effect of practical work and motivation on students’ desire to study stem subjects Amponsah, I.K. Vorsah; Addo-Mensah, D.; Anokye, M.; Babah, R.; Etsiwah, I. STEM is the foundation of all disciplines, yet fewer students are interested in pursuing such subjects due to fear and ‘difficulty’ associated with them. The Ghana Association of University Women (GAUW), the Ghana branch of Graduate Women International (GWI), believes that Motivation through various activities is key in solving such challenges. “Motivation refers to an inner drive to action that, in terms of observable consequences, might manifest itself in a pupil's decision” to actively study STEM subjects. There have been claims concerning the motivational worth of practical work, as students’ engage in both in and out laboratory activities to pursue science and mathematics related courses as they climb the academic ladder. This is a very useful means of evaluating the degree to which such assertions are reinforced by the facts. The purpose of this study was to ascertain if motivating Junior High School (JHS) students through talks and practical experiments on STEM subjects would remove the fear of STEM subjects. Respondents (79) were asked about their interest and perception about STEM subjects before and after the science clinic. The descriptive analysis revealed that JHS students’ interest in STEM subjects and the desire to study these subjects increased after participating in the programme. Those students who initially disliked the subjects and those who were neutral on whether they will pursue STEM subjects in Senior High School (SHS) or in the future changed their mind. Numbers shot up especially for mathematics (the most feared subject). Interest in Science, Technology, Engineering and Mathematics can be boosted by motivational activities (talks, tours, etc) and practical learning (laboratory work, reading exercises, etc) 12p:, ill.

2019-01-01T00:00:00Z