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Ali, C.A. & Wilmot, E.M. (2016). Pre-Service Teachers’ Didactic Conceptual Structures in the Absolute and Quadratic Inequalities. IOSR Journal of Mathematics (IOSR JM), 12,
Abstract
This paper examined the didactic conceptual structures of preservice teachers in the absolute and quadratic inequalities to deduce mistakes and errors. Quasi-experimental and mixed exploratory sequential designs were adopted on the participants who worked in 37 groups of 10 members in the Department of Basic Education, University of Education, Winneba in Ghana. The data collection instruments consisted of 15 open-ended items on the basic ideas of the absolute and quadratic inequalities to identify the didactic content knowledge in solving the problems. The thematic analysis of the conceptual structures as well as the marked scores revealed the errors and mistakes in the inner structures, inner relations, representations, and vertical-horizontal relations preservice teachers had confronted in solving problems in absolute and quadratic inequalities. The implications of these would impact negatively on the teaching and learning of mathematics curriculum, and inappropriately applied in a variety of daily lives.
This paper examined the didactic conceptual structures of preservice teachers in the absolute and quadratic inequalities to deduce mistakes and errors. Quasi-experimental and mixed exploratory sequential designs were adopted on the participants who worked in 37 groups of 10 members in the Department of Basic Education, University of Education, Winneba in Ghana. The data collection instruments consisted of 15 open-ended items on the basic ideas of the absolute and quadratic inequalities to identify the didactic content knowledge in solving the problems. The thematic analysis of the conceptual structures as well as the marked scores revealed the errors and mistakes in the inner structures, inner relations, representations, and vertical-horizontal relations preservice teachers had confronted in solving problems in absolute and quadratic inequalities. The implications of these would impact negatively on the teaching and learning of mathematics curriculum, and inappropriately applied in a variety of daily lives.
Ali, C.A. & Agyei, D.D. (2016). Preservice teachers’ technological, pedagogical and content knowledge in utilizing the Merrill’s first principles in solving polynomials. Merit Research Journal of Education and Review, 4,
Abstract
This study paper examined preservice teachers’ technological, pedagogical and content knowledge (TPACK) in utilizing the Merrill’s First Principles to solve problems in polynomial equations in order to showcase its relevance in modern technological discourse. Quasi-experimental and mixed exploratory sequential designs were adopted on 25 preservice teachers in the Department of Basic Education, University of Education, Winneba in Ghana. The data collection instruments consisted of 12 open-ended items in the knowledge and applications of the computer in using polynomial equations. Thematic analysis as well as single-subject t-test hypothesis revealed the low base of technological pedagogical and content knowledge of preservice teachers in solving polynomial problems. There is therefore the need to vigorously champion curriculum design principles that are sacrosanct with technology integration in the teaching and learning of mathematics in basic schools.
This study paper examined preservice teachers’ technological, pedagogical and content knowledge (TPACK) in utilizing the Merrill’s First Principles to solve problems in polynomial equations in order to showcase its relevance in modern technological discourse. Quasi-experimental and mixed exploratory sequential designs were adopted on 25 preservice teachers in the Department of Basic Education, University of Education, Winneba in Ghana. The data collection instruments consisted of 12 open-ended items in the knowledge and applications of the computer in using polynomial equations. Thematic analysis as well as single-subject t-test hypothesis revealed the low base of technological pedagogical and content knowledge of preservice teachers in solving polynomial problems. There is therefore the need to vigorously champion curriculum design principles that are sacrosanct with technology integration in the teaching and learning of mathematics in basic schools.
Current Research in Combustion: A Forum for Young Researchers and Early Career Researchers*S.K. Amedorme*Lecturer*IOP Institute of Physics, Combustion Physics Group*Loughborough University, UK*9 September, 2015*9 September, 2015
Amedorme, S.K., (2016). Automotive Electrical Systems.
Abstract
Amedorme,S.K. & Apodi, J. (2016). Influence of Density Ratio on Turbulence in Two Phase Flow. International Journal of Innovative Science, Engineering & Technology, 3,
Abstract
An entirely Eulerian approach treating two phase flow as a single phase with large scale features of the flow dependent only upon density variation is carried out. The average density for the two fluids is defined in the Computational Fluid Dynamics (CFD commercial code STAR-CCM+ and a transport equation tracking the liquid mass fraction models the turbulent mixing of liquid. Standard k-epsilon model is used for the turbulence. The paper shows the results of average density on turbulence and presents the contour plots of flow and turbulence fields such as turbulent kinetic energy and its rate of dissipation. The variations in the density ratios in relation to turbulent parameters are also presented and the noticeable changes in the turbulent quantities are analysed. Key words: Eulerian Model, Density Ratio, Liquid Mass Fraction, Turbulent and Flow Fields
An entirely Eulerian approach treating two phase flow as a single phase with large scale features of the flow dependent only upon density variation is carried out. The average density for the two fluids is defined in the Computational Fluid Dynamics (CFD commercial code STAR-CCM+ and a transport equation tracking the liquid mass fraction models the turbulent mixing of liquid. Standard k-epsilon model is used for the turbulence. The paper shows the results of average density on turbulence and presents the contour plots of flow and turbulence fields such as turbulent kinetic energy and its rate of dissipation. The variations in the density ratios in relation to turbulent parameters are also presented and the noticeable changes in the turbulent quantities are analysed. Key words: Eulerian Model, Density Ratio, Liquid Mass Fraction, Turbulent and Flow Fields
Amedorme,S.K.& Fiagbe,Y.A.K. (2016). Modification of an Existing Small Hydraulic Jack for Lifting Light Duty Vehicle. International Journal of Science and Technology, 5,
Abstract
Hydraulic jack has been used extensively in the maintenance, servicing and repairing of motor vehicles. Although the hydraulic jack serves a wide range of purpose, it has one major problem of unexpected hydraulic failure. This has called for the use of a mechanism or an axle stand when the hydraulic jack is in use. Most often, drivers carry the jack forgetting to go along with the stand. And in the event of any repairs on the road have to use incorrect undersigned or unprescribed supports to assist the jack. This paper highlights on the modification of an existing small hydraulic jack for lifting light duty vehicle. The modified jack has been incorporated with reasonable clutch top, simple locking mechanism and sizeable base to support the weight of the vehicle in the event of any hydraulic failure. The distortion energy theory (DET) is used to predict failure and check the factor of safety. The new modification makes the jack serves multi-purpose function of lifting and acting as supporting unit. It also prevents the frustrations the drivers go through in search for undersigned lifting supports between trips when they encounter a flat tyre as well as eliminates the burden mechanics go through in fixing an axle stand. Key words: Modified Hydraulic Jack, Hydraulic Failure, Failure Prediction, Von Mises
Hydraulic jack has been used extensively in the maintenance, servicing and repairing of motor vehicles. Although the hydraulic jack serves a wide range of purpose, it has one major problem of unexpected hydraulic failure. This has called for the use of a mechanism or an axle stand when the hydraulic jack is in use. Most often, drivers carry the jack forgetting to go along with the stand. And in the event of any repairs on the road have to use incorrect undersigned or unprescribed supports to assist the jack. This paper highlights on the modification of an existing small hydraulic jack for lifting light duty vehicle. The modified jack has been incorporated with reasonable clutch top, simple locking mechanism and sizeable base to support the weight of the vehicle in the event of any hydraulic failure. The distortion energy theory (DET) is used to predict failure and check the factor of safety. The new modification makes the jack serves multi-purpose function of lifting and acting as supporting unit. It also prevents the frustrations the drivers go through in search for undersigned lifting supports between trips when they encounter a flat tyre as well as eliminates the burden mechanics go through in fixing an axle stand. Key words: Modified Hydraulic Jack, Hydraulic Failure, Failure Prediction, Von Mises
Amedorme, S.K. & Burluka, A.A. (2017). Numerical Prediction of Sauter Mean Diameter from Pressure Swirl Atomizer Using Eulerian Model. International Journal of Engineering and Technology, 7,
Abstract
Atomizers are used in many engineering applications including spray combustion in furnaces, diesel engines, gasoline direct injection engines and gas turbine engines. Pressure swirl atomizers occupy a special position amongst other atomizers because they differ in quality of atomization, simplicity of construction, reliability of operation, low clogging and low expenditure of energy. Turbulence behaviour and the mean droplet size are indispensable considerations in the sprays and atomization process of pressure swirl atomizers. This paper presents entirely Eulerian modelling of two phase flow in a pressure swirl atomizer as a single multi-component phase with high density variations using Computational Fluid Dynamics (CFD) commercial code STAR-CD. The transport equations for the liquid surface density and liquid mass fraction are modelled for the flow and turbulent fields. Numerical results such as liquid mass fraction and liquid surface density are presented. The model also shows the results of atomization characteristics such as droplet velocity and predicts Sauter Mean Diameter (SMD) with reasonable order-of- magnitudes. Key words: Sauter Mean Diameter (SMD), Droplet Velocity, Eulerian Modelling, Liquid Mass Fraction, Liquid Surface Density
Atomizers are used in many engineering applications including spray combustion in furnaces, diesel engines, gasoline direct injection engines and gas turbine engines. Pressure swirl atomizers occupy a special position amongst other atomizers because they differ in quality of atomization, simplicity of construction, reliability of operation, low clogging and low expenditure of energy. Turbulence behaviour and the mean droplet size are indispensable considerations in the sprays and atomization process of pressure swirl atomizers. This paper presents entirely Eulerian modelling of two phase flow in a pressure swirl atomizer as a single multi-component phase with high density variations using Computational Fluid Dynamics (CFD) commercial code STAR-CD. The transport equations for the liquid surface density and liquid mass fraction are modelled for the flow and turbulent fields. Numerical results such as liquid mass fraction and liquid surface density are presented. The model also shows the results of atomization characteristics such as droplet velocity and predicts Sauter Mean Diameter (SMD) with reasonable order-of- magnitudes. Key words: Sauter Mean Diameter (SMD), Droplet Velocity, Eulerian Modelling, Liquid Mass Fraction, Liquid Surface Density
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Workshop on Covering Official Events*Reginald Sitsofe Kwaku Agbo*Senior Assistant Registrar*Division of Publications and Communication*Registry Conference Room, Winneba, Ghana*April 12, 2017*April 12, 2017
Kulevome, J. D & Amissah, E. R. K. (2017). Narrative Study of Female Kete Weavers in Agbozume. Arts and Design Studies, 52,
Abstract
The kete (woven fabric) industry in Agbozume has been one of the indigenous craft centres that has been in practiced from generation to generation in the Volta region of Ghana. The craft has contributed immensely to the economic and socio-cultural development of the area. Both male and female play enormous roles in the industry. Like many other indigenous crafts practiced in Ghana, the males dominate and are projected more than their female counterparts. Very little is known about the immense contributions females are making to the development of the industry, the society and Ghana at large. This research work, therefore, attempts to explore and identify female kete weavers in Agbozume and its surrounding villages. It also traces the origins of the female weavers with special reference to how they acquired the kete weaving skills, the prospects of them surviving in a male dominated industry, and the role they play in terms of marketing their products. The study is a qualitatively based, which enable the researchers to understand the socio-cultural set-up by the people. The research tools employed were: interview, observation and photography. The purposive sampling technique was employed to select fourteen (14) female master weavers for the study. (For the purpose of this paper, eight (8) are presented). Their kete weaving activities were narrated individually and was presented in a narrative form. The study unearthed, that, females do not only play supporting role to their male counterparts when it comes to kete weaving, but also practise the trade just like the males do. This presupposes that, should they be given the necessary support, it will attract more females into the industry and employment would increase to generate more income to reduce poverty in the area. Studies such as this would promote the many ways in which female Keke weavers are involved in the production and promotions of this indigenous craft. Keywords: kete, (woven fabric), female, weavers
The kete (woven fabric) industry in Agbozume has been one of the indigenous craft centres that has been in practiced from generation to generation in the Volta region of Ghana. The craft has contributed immensely to the economic and socio-cultural development of the area. Both male and female play enormous roles in the industry. Like many other indigenous crafts practiced in Ghana, the males dominate and are projected more than their female counterparts. Very little is known about the immense contributions females are making to the development of the industry, the society and Ghana at large. This research work, therefore, attempts to explore and identify female kete weavers in Agbozume and its surrounding villages. It also traces the origins of the female weavers with special reference to how they acquired the kete weaving skills, the prospects of them surviving in a male dominated industry, and the role they play in terms of marketing their products. The study is a qualitatively based, which enable the researchers to understand the socio-cultural set-up by the people. The research tools employed were: interview, observation and photography. The purposive sampling technique was employed to select fourteen (14) female master weavers for the study. (For the purpose of this paper, eight (8) are presented). Their kete weaving activities were narrated individually and was presented in a narrative form. The study unearthed, that, females do not only play supporting role to their male counterparts when it comes to kete weaving, but also practise the trade just like the males do. This presupposes that, should they be given the necessary support, it will attract more females into the industry and employment would increase to generate more income to reduce poverty in the area. Studies such as this would promote the many ways in which female Keke weavers are involved in the production and promotions of this indigenous craft. Keywords: kete, (woven fabric), female, weavers
