Ensuring Content Representativeness: Perceptions of Senior High School Teachers in Ghana

For a meaningful classroom assessment to be feasible, teachers must ensure adequate content representativeness when crafting their items. The study sought to find out the perceptions of senior high school teachers on how well they ensure content representativeness in their classroom assessment procedures in Ghana. Underpinned by the theory of validity, the study used the qualitative research approach. The purposive sampling procedure was used to select a sample of 25 participants for the study. The interview guide was used to collect data for the study. The data was analysed manually using the thematic approach. The results of the study revealed that senior high school teachers least ensure content representativeness in their assessment procedures because they fail to develop and use a table of the test specification. In furtherance to this, the study showed that senior high school teachers do not consult measurement experts or curriculum planners to thoroughly judge the items the teachers craft in ensuring content representativeness. It is recommended among others that there should be the need for educating teachers on what table of a test specification is, and how to develop and use it

Prevalence of liver lesions in small ruminants (sheep and goats) slaughtered at the Kumasi Abattoir, Ghana

This study aimed to determine the occurrence of liver lesions in slaughtered sheep and goat with specific reference to the prevalence, breed, age, sex and month influence on liver lesion and also the pathological changes and its effect on the cost. This study involves a 3 months period (October and December 2015) weekly inspection of 2044 slaughtered sheep and goat, 824 were purposively examined, of which 75 were partially condemned and 36 samples out of the partially condemned were used for histopathological analysis. Lesions recorded were granuloma, necrosis, degeneration, cystic vacuole and some with no lesion. Age, sex and breeds had significant influence (p>0.05) on the prevalence of liver lesions in sheep and goat. West African dwarf was the most susceptible breed. The ages in both species (sheep and goats) above 2 – 3 years were most susceptible to liver lesions. Goats were more susceptible than sheep and within the 3 months study the abattoir loss GH¢ 1125 due to liver lesion Economic loss due to liver condemnation estimated has showed there is much to be done to save loss incomes from liver condemnation. Good husbandry practices, proper feeding and good veterinary care should be given to small ruminants in order to minimize liver disease in small ruminants in Ghana

The higher-order modified Korteweg-de Vries equation: Its soliton, breather and approximate solutions

In this study, the fifth-order modified Korteweg-de Vries (F-MKdV) equation is first addressed using Hirota\u27s bilinear method. Thereafter, the exact and approximative solutions of the generalized form of the F-MKdV equation are investigated using the modified Kudryashov method, the Riccati equation and its Backlund transformation method, the solitary wave ansatz method, and the homotopy perturbation transform method (HPTM). As a result, solitons, breather, and solitary wave solutions are derived from these methods. In particular, we obtain some new solutions such as the dark soliton, bright soliton, singular soliton, periodic trigonometric, exponential, hyperbolic, and rational solutions. The constraint conditions associated with the resulting solutions are also discussed in detail. The HPTM is employed to construct approximate solutions to the aforementioned generalized model due to its strong nonlinear terms and only a few terms are required to obtain accurate solutions. These findings may help to understand complex nonlinear phenomena

Herding Behavior of Ghana Stock Market Participants: A Daily Analysis

This study investigates the herding behavior of Ghana stock market participants and its impact on stock returns. Using panel data of 38 equities listed on the Ghana stock market, the data spans from 2011 to 2019. Fixed effect model was used for all estimations. Overall, the study results failed to indicate evidence of herding behavior in the Ghana stock market. This result further indicates that at low levels, the market participants herd but at higher levels, there is the absence of herding behavior. In bull market conditions, market participants act in unison only at high levels. The result validates the assumption of the rational asset pricing model

A mathematical and exploratory data analysis of malaria disease transmission through blood transfusion

Malaria is a mosquito-borne disease spread by an infected vector (infected female Anopheles mosquito) or through transfusion of plasmodium-infected blood to susceptible individuals. The disease burden has resulted in high global mortality, particularly among children under the age of five. Many intervention responses have been implemented to control malaria disease transmission, including blood screening, Long-Lasting Insecticide Bed Nets (LLIN), treatment with an anti-malaria drug, spraying chemicals/pesticides on mosquito breeding sites, and indoor residual spray, among others. As a result, the SIR (Susceptible—Infected—Recovered) model was developed to study the impact of various malaria control and mitigation strategies. The associated basic reproduction number and stability theory is used to investigate the stability analysis of the model equilibrium points. By constructing an appropriate Lyapunov function, the global stability of the malaria-free equilibrium is investigated. By determining the direction of bifurcation, the implicit function theorem is used to investigate the stability of the model endemic equilibrium. The model is fitted to malaria data from Benue State, Nigeria, using R and MATLAB. Estimates of parameters were made. Following that, an optimal control model is developed and analyzed using Pontryaging\u27s Maximum Principle. The malaria-free equilibrium point is locally and globally stable if the basic reproduction number (R0) and the blood transfusion reproduction number (Rα) are both less or equal to unity. The study of the sensitive parameters of the model revealed that the transmission rate of malaria from mosquito-to-human (βmh), transmission rate from humans-to-mosquito (βhm), blood transfusion reproduction number (Rα) and recruitment rate of mosquitoes (bm) are all sensitive parameters capable of increasing the basic reproduction number (R0) thereby increasing the risk in spreading malaria disease. The result of the optimal control shows that five possible controls are effective in reducing the transmission of malaria. The study recommended the combination of five controls, followed by the combination of four and three controls is effective in mitigating malaria transmission. The result of the optimal simulation also revealed that for communities or areas where resources are scarce, the combination of Long Lasting Insecticide Treated Bednets (u2), Treatment (u3), and Indoor insecticide spray (u5) is recommended. Numerical simulations are performed to validate the model\u27s analytical results

Determination of Haematological Reference Ranges in Healthy Adults in Three Regions in Ghana

Laboratory results interpretation for diagnostic accuracy and clinical decision-making in this period of evidence-based medicine requires cut-off values or reference ranges that are reflective of the geographical area where the individual resides. Several studies have shown significant differences between and within populations, emphasizing the need for population-specific reference ranges. This cross-sectional experimental study sought to establish the haematological reference values in apparently healthy individuals in three regions in Ghana. Study sites included Nkenkaasu, Winneba, and Nadowli in the Ashanti, Central, and Upper West regions of Ghana, respectively. A total of 488 healthy participants were recruited using the Clinical and Laboratory Standards Institute (United States National Consensus Committee on Laboratory Standards, NCCLS) Guidance Document C28A2. Medians for haematological parameters were calculated and reference values determined at 2.5th and 97.5th percentiles and compared with Caucasian values adopted by our laboratory as reference ranges and values from other African and Western countries. RBC count, haemoglobin, and haematocrit (HCT) were significantly higher in males compared to females. There were significant intraregional and interregional as well as international variations of haematological reference ranges in the populations studied. We conclude that, for each geographical area, there is a need to establish geography-specific reference ranges if accurate diagnosis and concise clinical decisions are to be made

The effectiveness of e‐health interventions for the treatment of overweight or obesity in children and adolescents: A systematic review and meta‐analysis

info:eu-repo/semantics/publishe

Antierythropoietin Antibody Production Is Not Associated with Malaria and Malaria-Related Anaemia in Humans

Introduction. The pathophysiology of malaria-related anaemia is not fully understood although increased destruction of parasitized and nonparasitized erythrocytes, as well as inadequate erythropoiesis, has been proposed. Circulating antierythropoietin (anti-EPO) antibodies have also been implicated in malaria and malaria-related anaemia in mice. However, studies on this association have not been investigated in humans. This study therefore determined the prevalence of anti-EPO antibody production and assessed its association with malaria and malaria-related anaemia in humans. Methods. A total of 86 children aged 1-10 years (57 children with malaria serving as the case group and 29 healthy children serving as control), all residents of Duayaw Nkwanta, Ghana, were recruited for this case-control study. Venous blood was collected for thick and thin films for malaria microscopy, full blood count by automated haematology analyzer, and antierythropoietin antibody and erythropoietin estimation by sandwich ELISA method. Results. Out of the 86 participants recruited, only 3 (3.5%) were positive for anti-EPO antibody; 2.3% of the case group; and 1.2% of the control group. There was no association between the cases and the controls in the production of anti-EPO antibodies. Erythropoietin concentration was significantly higher in malaria-related anaemic subjects (p=0.032). Conclusion. Antierythropoietin antibodies are not associated with malaria infection and malaria-related anaemia in humans. Erythropoietin concentration is associated with malaria-related anaemia