A Comparative Analysis of Rock Fragmentation using Blast Prediction Results

This work presents prediction and optimisation of controllable parameters of drilling and blasting currently used at the Fobinso Pit of Perseus Mining Ghana Limited (PMGL). The mine faces challenges with blast particle sizes produced after primary blasting. The presence of boulders requires secondary fragmentation to further reduce the broken materials to the acceptable sizes, thereby increasing the cost of production. The mechanical properties of the rocks were determined using Protodyakonov Rock Strength Index. The drill and blast parameters were estimated using the Konya and Walter (1990), Principle of Proportionality, and Instituto Geologo Minero de España (IGME) model developed in 1987. The Modified Kuz-Ram model was used to predict and analyse the results of blasting based on the parameters such as spacing, burden, drillhole diameter, charge density, charge per hole, charge length, and powder factor. A comparative analysis of the predicted size distributions of the various models using diameters of 65 mm and 110 mm revealed no significant differences between the size fractions. The Principle of Proportionality produced the best technical and economic indices for blasting. Keywords: Fragmentation, Drilling Parameters, Primary Blasting, Models, Secondary Blastin

The impact of ICT on Financial Sector Policy Reforms in Post-Financial crisis era in Ghana:: An institutional theory perspective

Ghana, like most other developing countries, is not isolated from the global financial crisis through the impact of such a crisis on economies. This paper examines the financial sector reforms and its effect on the Ghanaian economy, within the developing country context in general and in sub-Saharan Africa (SSA) in particular. The paper seeks to enhance the understanding of relevant policy measures and reflects on what else could be done. The article further studies the effect of change in the institutional environment on bank governance practices primarily to improve the industry’s supervision and regulation, related to the post-crisis exit strategies. This paper discusses the development of ICT infrastructure and application as a basis for the main dimension of Ghana’s digital transformation in financial services. This paper is, therefore, motivated by the lack of empirical studies that examines how the impact of the banking reforms play a substantial role in promoting innovative digital payment systems to replace cash transactions. From the perspective of institutional theory, the study looked at why (and how) a number of policy measures have a significant impact on the financial performance of banks? And how the applications of e-finance in ICT and financial practices, provides several benefits within the banking sector improve the sector’s image and leads to a broader, faster and more efficient market? The application of Koppenjan and Groenewegen (2005) ‘s four-layer model ‘levels of institutional analysis’ perspective seems to be the most useful starting point, which provides the basis for an improved understanding of revealing the inefficient delivery of Ghanaian banking industry in the past. A combination of a review of secondary and empirical data, interviewed used in the analysis. Findings indicate that the financial and banking sector reforms help the industry   advance digital banking culture and impact on the general expansion of the financial and the infusion of financial inclusion in Ghana. These conclusions would be particularly useful in a similar picture in other developing countries, as well as by the bank authorities to create their future policy. It also joins the debate on the impact of the banking reform, a key turning point towards better regulation to refine crisis prevention and resolution mechanisms

Metal Welding Sculptural Portraiture for the Historical Remembrance of Political Figures in Ghana: The Case of Osagyefo Dr. Kwame Nkrumah

Artists in Ghana who produce sculptural busts or portraits mostly limit their production materials to clay P O P cement and metal cast These materials may have defects and could be potentially affected by environmental conditions for lifelong periods Aluminium welding is not practiced by artists in the fabrication of photorealistic portraits The techniques used by artists in Ghana is the clay and cement model which can further be used in the creation of a cast resin or metal The researchers investigated the most used materials for creating realistic busts The pros and cons of the materials as well as their techniques were rigorously analyzed in comparison with the aluminium forming and welding technique Welders are constrained as far as what they can create Mostly welders produce iron gates burglar-proof and security locks There is the need to diversify the technique to be able to produce portraits as a step in experimenting and diversifying the material and techniqu

Risk Factors for Injury Mortality in Rural Tanzania: A Secondary Data Analysis.

\ud \ud Injuries rank high among the leading causes of death and disability annually, injuring over 50 million and killing over 5 million people globally. Approximately 90% of these deaths occur in developing countries. To estimate and identify the risk factors for injury mortality in the Rufiji Health and Demographic Surveillance System (RHDSS) in Tanzania. Secondary data from the RHDSS covering the period 2002 and 2007 was examined. Verbal autopsy data was used to determine the causes of death based on the 10th revision of the International Classification of Diseases (ICD-10). Trend and Poisson regression tests were used to investigate the associations between risk factors and injury mortality. The overall crude injury death rate was 33.4/100 000 population. Injuries accounted for 4% of total deaths. Men were three times more likely to die from injuries compared with women (adjusted IRR (incidence risk ratios)=3.04, p=0.001, 95% CI (2.22 to 4.17)). The elderly (defined as 65+) were 2.8 times more likely to die from injuries compared with children under 15 years of age (adjusted IRR=2.83, p=0.048, 95% CI (1.01 to 7.93)). The highest frequency of deaths resulted from road traffic crashes. Injury is becoming an important cause of mortality in the Rufiji district. Injury mortality varied by age and gender in this area. Most injuries are preventable, policy makers need to institute measures to address the issue

Clustering of childhood mortality in the Kintampo Health and Demographic Surveillance System in Ghana

Background: Childhood mortality in Ghana has generally declined in the last four decades. However, estimates tend to conceal substantial variability among regions and districts. The lack of population-based data in Ghana, as in other less developed countries, has hindered the development of effective programmes targeted specifically at clusters where mortality levels are significantly higher. Objective: This paper seeks to test for the existence of statistically significant clusters of childhood mortality within the Kintampo Health and Demographic Surveillance System (KHDSS) between 2005 and 2007. Design: In this study, mortality rates were generated using mortality data extracted from the health and demographic surveillance database of the KHDSS and exported into STATA. The spatial and spatio-temporal scan statistic by Kulldorff was used to identify significant clusters of childhood mortality within the KHDSS. Results: A significant cluster of villages with high under-five mortality in the south-eastern part of the KHDSS in 2006 was identified. This is a remote location where poverty levels are relatively higher, health facilities are more sparse and these are compounded by poor transport services in case of emergencies. Conclusion: This study highlights the potential of the surveillance platform to demonstrate the spatial dimensions of childhood mortality clustering. It is apparent, though, that further studies need to be carried out in order to explore the underlying risk factors for potential mortality clusters that could emerge later

Classroom Factors that Affects the Performance of Integrated Science Students at the Junior High School in the Kumasi Metropolis of Ghana

The purpose of the study was to find out the opinions of public and private Junior High School science teachers on the classroom factors that affect performance of students in integrated science in public and private junior high schools in the Kumasi metropolis. The study used descriptive survey designed. The sampling procedure employed for the study was both random and purposive sampling. While the integrated science teachers were purposively sampled due to their subject they teach, the students were randomly selected. Questionnaire and interview were used for data collection. It was found out that integrated science teachers to be aware that classroom factors such as teacher-student relationship, availability of science resource materials, teaching methods employed by teachers, class size, supervision and physical infrastructure are likely to affect performance of students in integrated science at the J.H.S. level. Again, the findings revealed that the selected public schools within the Kumasi metropolis were well resourced with the following: adequate physical infrastructure, adequate science resource materials, adequate science text books and adequate trained science teachers as against their private school counterparts with inadequate physical infrastructure, inadequate science resource materials, inadequate science text books and few trained science teachers. It was recommended that effective supervision must be performed regularly by heads of schools during integrated science lessons. The heads of the public JHS especially, those in the Kumasi metropolis must be made to regularly ensure that their science teachers teach very well during integrated science lessons. Keywords: Laboratory, Performance, Classroom factor

The Effect of Culture on the Teaching and Learning of Science at the Basic Schools in Ghana

The purpose of the study was to investigate how culture influences the teaching and learning of science at the basic schools in the Agona West Municipality of the Central Region, East Akim Municipality of the Eastern Region and the Kwabre District of the Ashanti Region of Ghana. The research design used for this study was descriptive survey. The sampling procedure employed for the study was the purposive sampling. A total of three hundred and thirty (330) subjects were selected, made up of three hundred (300) students and thirty (30) science teachers. The instruments used for collecting data for the study consisted of questionnaire, interview and observation schedules. It was found out that students had cultural knowledge they use in explaining phenomena. Teachers were aware of student’s cultural knowledge especially in explaining concepts. It was recommended that teachers should teach their students bearing in mind their cultural knowledge and incorporate that in their teaching. Keywords: Culture, Cultural knowledge, Scientific concept, Taboos

Examining the Relationships between Supply Chain Integration, Information Sharing, and Supply Chain Performance: A Replication Study

This study performs a conceptual replication of the study of Koçoğlu et al. (2011) which explored the effect of Supply Chain Integration (SCI) on Supply Chain Performance (SCP) and Information Sharing using manufacturing firms in Turkey. The replicated study explored the same relationships but considered manufacturing and service firms belonging to one giant supply chain in Ghana. Whilst the results of the measurement model of replicated study are valid and reliable, the structural model results were different from that of the original study. The original study observed a positive significant effect of SCI on SCP which was not confirmed in our study. Instead, a mediating effect of Information Sharing on the relationship between SCI and SCP was observed. The differences in the structural model results may have arisen due to the different conceptualization of the SCP construct, or the existence of different contextual and/or environmental factors

Community perceptions of a malaria vaccine in the Kintampo districts of Ghana.

BACKGROUND: Malaria remains the leading cause of morbidity and mortality in sub-Saharan Africa despite tools currently available for its control. Making malaria vaccine available for routine use will be a major hallmark, but its acceptance by community members and health professionals within the health system could pose considerable challenge as has been found with the introduction of polio vaccinations in parts of West Africa. Some of these challenges may not be expected since decisions people make are many a time driven by a complex myriad of perceptions. This paper reports knowledge and perceptions of community members in the Kintampo area of Ghana where malaria vaccine trials have been ongoing as part of the drive for the first-ever licensed malaria vaccine in the near future. METHODS: Both qualitative and quantitative methods were used in the data collection processes. Women and men whose children were or were not involved in the malaria vaccine trial were invited to participate in focus group discussions (FGDs). Respondents, made up of heads of religious groupings in the study area, health care providers, traditional healers and traditional birth attendants, were also invited to participate in in-depth interviews (IDIs). A cross-sectional survey was conducted in communities where the malaria vaccine trial (Mal 047RTS,S) was carried out. In total, 12 FGDs, 15 IDIs and 466 household head interviews were conducted. RESULTS: Knowledge about vaccines was widespread among participants. Respondents would like their children to be vaccinated against all childhood illnesses including malaria. Knowledge of the long existing routine vaccines was relatively high among respondents compared to hepatitis B and Haemophilus influenza type B vaccines that were introduced more recently in 2002. There was no clear religious belief or sociocultural practice that will serve as a possible barrier to the acceptance of a malaria vaccine. CONCLUSION: With the assumption that a malaria vaccine will be as efficacious as other EPI vaccines, community members in Central Ghana will accept and prefer malaria vaccine to malaria drugs as a malaria control tool. Beliefs and cultural practices as barriers to the acceptance of malaria vaccine were virtually unknown in the communities surveyed

Impact of ERP Implementation on Business Process Outcomes: A Replication of a United States Study in a Sub-Saharan African Nation

This study is a conceptual replication of Karimi et al.’s (2007) study on the impact of ERP implementations on business process outcomes among US manufacturing firms in a Sub-Saharan African (SSA) nation. The results of the measurement model are valid and reliable, which are consistent and comparable with that of the original study, enhancing the external validity of the constructs proposed in the original model. However, only one of the four hypotheses tested in the structural model was confirmed in the current study although all four were supported in the original study. While the original model was tested on manufacturing firms in the US, the replicated study was carried out in several industries in Ghana, a SSA nation. Thus the differences in the structural model results do not invalidate the original model but suggest the need for capturing contextual or environmental variables such as culture, industry, ethical behavior, and data culture in order to enhance the external validity and theoretical contribution of the original model in the SSA context