Seismic survey is a program for mapping geological structure by observation of seismic wave. Crea... more Seismic survey is a program for mapping geological structure by observation of seismic wave. Creating seismic wave with artificial sources and observing the arrival time of the waves reflected from acoustic impedance contrasts or refracted through high velocity members. Real-time vertical seismic profile (VSP) imaging provides information ahead of the drill bit that confirmed the well trajectory. A key objective was to determine the best location for the seismic source while drilling. Geological bodies like salt causes ray bending which leads to higher amplitude reflections between sediment layers and causes multiple rays scattering in the data collected. Conventional source location and interpolation methods heavily rely on the accuracy of the velocity models. In this paper interferometric techniques will be use to extract multiple scatter information in ocean bottom seismic data which will provide reliable results without knowledge of the velocity models. The sparse ocean bottom s...
Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow strea... more Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows for the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement pro...
The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signatu... more The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signature of biological significant. Explore geologically diverse landing sites by gathering scientifically compelling and well-documented set of rocks, soil samples and assemble them into a sealed container that could be returned to Earth by a future NASA mission. This presentation will give a mission concept based on AI approach using one rover and helicopter to explore the geological formation of rocks on Mars without bringing them to Earth.
Wireless technology is one of the main areas of research in the world of communication systems to... more Wireless technology is one of the main areas of research in the world of communication systems today. It is important to know that the study of wireless communication systems is incomplete without the understanding of the fabrication and operation of antennas. A vast number of RF devices such as the microwave ovens, cordless telephones and medical devices currently operate in the 2.4 GHz band. In this paper, a biquad antenna whose central working frequency is 2.445 GHz was fabricated and optimised by placing it in a mesh dish. The Biquad Antenna was tested on the first floor of the four story building at the Regent University College. Result shows that the antenna achieved 70% to 80% range of signal strength, improving the directivity of a WLAN covering as far as the third floor, the ground floor as well as the surroundings. This was achieved by placing the Biquad Antenna feed in the focal point of a mesh dish which helps to focus the radio waves onto the Biquad Antenna. Comparing t...
Solar energy is used directly for drying bulk of agriculture products in the country, especially ... more Solar energy is used directly for drying bulk of agriculture products in the country, especially cocoa beans. In this paper, research work identifies practical and technological ways by which the Crank-Nicolson equation is applied to heat equations using finite difference method to develop a green house type of solar dryer used in drying cocoa beans. The mathematical model of the extended Crank-Nicholson method for the general case of the 3-D (three-dimensional) conduction equation for green house effect type dryer has been derived and simulated using the Mathwork Matlab program. The performance of dryer was then determined, using drying cocoa beans from freshness with water content of about 50%,60% and 70% to dried beans with water content of about 7% of the weight. The results show that the green house effects dryer made of polythene sheeting produces temperatures of 500C to 600C and dries cocoa very well within seven days with water content of 50% to dried beans with 7% of water ...
Ultrasonic flow meters, as all velocity or inference t ype devices, require an adequate flow stre... more Ultrasonic flow meters, as all velocity or inference t ype devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement procedure. The relationship between velocity and viscosity, using Reynolds Number, was calculated in Microsoft Excel. The Nusselt Number was then used to plot fluid mean temperature and wall temperature diagrams in Microsoft Excel.
This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI)... more This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor. The data was processed with MATLAB neural network time series prediction algorithm to forecast NO2 concentration in Ghana by the year 2020. The average NO2 and UV aerosol index data over Accra from 2005 to 2015 was a n a l y z e w i t h Levenberg- Marquardt method for machine learning model, which forecast indicated that NO2 increased to 5.00×1015 molecules cm-2 with UV aerosol index of about - 2.5. Averaged NO2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO2 concentration in Ghana was measured as 0.692 ×1015 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×1015 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana. Key words: Ozone layer, Nitrogen dioxide, Machine learning, MATLAB.
This work presents nitrogen dioxide (NO 2) measurements from the Ozone Monitoring Instrument (OMI... more This work presents nitrogen dioxide (NO 2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor processed with MATLAB neural network time series prediction algorithm were used to forecast NO 2 concentration in Ghana by the year 2020. The average NO 2 and UV aerosol index data over Accra from 2005 to 2015 was processed with Levenberg-Marquardt method for machine learning model, which forecast indicated that NO 2 increased to 5.00×10 15 molecules cm-2 with UV aerosol index of about-2.5. Averaged NO 2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO 2 concentration in Ghana was measured as 0.692 ×10 15 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×10 15 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO 2 emission and shows that higher NO 2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO 2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
Project abstract: The goal of this work is to design an embedded piezopack power supply system (E... more Project abstract: The goal of this work is to design an embedded piezopack power supply system (EPPSS) to recharge discharged battery by means of power harvesting device proposed and implemented with Texas Instruments (TI) components. This idea is inspired by current research activity to develop enhanced power converter systems suitable for range of applications. Potential users of this technology include the designers of portable and stand-alone systems such as laptops and hand-held electronics. It has been proven that, micro to milliwatts of power can be generated from vibrating materials. In gadgets like mobile phones, television remote controllers, laptops and other devices which employ key depression for operation, mechanical vibrations are produced while pressing the key. These mechanical vibrations are converted into electrical power by a piezo crystal. Hence the EPPSS was placed under the key pads to charge the battery using the harvested power.
Over the past two decades, thousands of people, primarily Ghanaians from the country’s
Impoverish... more Over the past two decades, thousands of people, primarily Ghanaians from the country’s Impoverished north, have flocked to the Agbogbloshie scrapyard to strip and burn waste from consumer appliances and collect the valuable metals inside. Those who rely on the scrapyard for their livelihood say they have few other ways to make money, even if the fires lit to remove metals such as copper and aluminium from their plastic casings belch cancer-causing smoke. Western nations have been kicking down old computers, refrigerators and anything else electronic to west African countries like Ghana for disposal. About 40,000 tonnes of this electronic waste came into the country in 2010; this resulted in the increase of NO2 concentration in Ghana as shown in figure 3 and 4. When plastic, foam and whatever else comes into Agbogbloshie is set alight, it releases a mélange of poisons, from greenhouse gases to mercury, cadmium and lead. A 2008 study by Greenpeace found that the concentration of metals such as these in the yard’s soot-laden ground is as much as 100 times higher than normal. Another 2011 study published in the journal Environment International sampled breast milk from mothers in Accra and found elevated levels of polychlorinated biphenyls, an industrial chemical banned by 2001 United Nations treaty, due to consequences of Agbogbloshie’s smoke across the city of four million residents. The analysis performed on the data as shown in figure 4 and 5 indicates that there is consistent increased of NO2 concentration from 2005 to 2013 over Ghana. This consistent increased is shown in figure 6 with the highest concentration of 82000 mole per cm cube, hence the need for capturing technology to reduce this effect.
Many people around the world living in communities near water bodies which serve as a source of g... more Many people around the world living in communities near water bodies which serve as a source of generating income, nourishment and livelihood. Yet these communities are prone to dangers such as flooding and drought, a few of such communities include those along the Volta basin which extends from Ghana to Burkina Faso, Togo, Ivory Coast, Mali and Benin. Hence this research work will develop a system to monitor water level of Volta Lake and communicate with satellite constellation.
Wireless technology is one of the main areas of research in the world of communication systems to... more Wireless technology is one of the main areas of research in the world of communication systems today. It is important to know that the study of wireless communication systems is incomplete without the understanding of the fabrication and operation of antennas. A vast number of RF devices such as the microwave ovens, cordless telephones and medical devices currently operate in the 2.4 GHz band. In this paper, a biquad antenna whose central working frequency is 2.445 GHz was fabricated and optimised by placing it in a mesh dish. The Biquad Antenna was tested on the first floor of the four story building at the Regent University College. Result shows that the antenna achieved 70% to 80% range of signal strength, improving the directivity of a WLAN covering as far as the third floor, the ground floor as well as the surroundings. This was achieved by placing the Biquad Antenna feed in the focal point of a mesh dish which helps to focus the radio waves onto the Biquad Antenna. Comparing to omnidirectional antenna whose signal strength was 56%, the performance of the biquad antenna was better. The results from the testing of both antennas were simulated separately in a Matlab. The combined effect of these was also simulated using a parabolic reflector mathematical model which gave a new waveform propagating pattern resulting in the better performance. Key words: Biquad antenna, signal strength, omnidirectional antenna, optimisation, fabrication.
The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reyno... more The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reynolds and Nusselt number, is both a textbook and reference that engineers and technicians will want in their personal libraries. The three main objectives are: 1. A multipath meter with an integration method of velocity profile correction, to improve performance on high viscosity low Reynolds numbers applications. 2. Robustness in correcting asymmetric axial flow velocity profiles. 3. Compensation transverse flow components. Features include techniques such as velocity profile correction, accurate measurement at the lower flow range are shown in simulations.The type of oil samples which were considered are Light, Medium,Brad Penn,Heavy and Extra heavy oils. The use of analogies for modeling fluid flow,thermal and mechanical components. A brief introduction to computational fluid dynamics is presented, while any intelligent computer-literate person can run a CFD code.
The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reyno... more The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reynolds and Nusselt number, is both a textbook and reference that engineers and technicians will want in their personal libraries. The three main objectives are: 1. A multipath meter with an integration method of velocity profile correction, to improve performance on high viscosity low Reynolds numbers applications. 2. Robustness in correcting asymmetric axial flow velocity profiles. 3. Compensation transverse flow components. Features include techniques such as velocity profile correction, accurate measurement at the lower flow range are shown in simulations.The type of oil samples which were considered are Light, Medium,Brad Penn,Heavy and Extra heavy oils. The use of analogies for modeling fluid flow,thermal and mechanical components. A brief introduction to computational fluid dynamics is presented, while any intelligent computer-literate person can run a CFD code.
Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow strea... more Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows for the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement procedure. The relation between velocity and viscosity, using Reynolds Number, was calculated in Microsoft Excel. The Nusselt Number was then used to plot fluid mean temperature and wall temperature diagrams in Microsoft Excel.
Seismic survey is a program for mapping geological structure by observation of seismic wave. Crea... more Seismic survey is a program for mapping geological structure by observation of seismic wave. Creating seismic wave with artificial sources and observing the arrival time of the waves reflected from acoustic impedance contrasts or refracted through high velocity members. Real-time vertical seismic profile (VSP) imaging provides information ahead of the drill bit that confirmed the well trajectory. A key objective was to determine the best location for the seismic source while drilling. Geological bodies like salt causes ray bending which leads to higher amplitude reflections between sediment layers and causes multiple rays scattering in the data collected. Conventional source location and interpolation methods heavily rely on the accuracy of the velocity models. In this paper interferometric techniques will be use to extract multiple scatter information in ocean bottom seismic data which will provide reliable results without knowledge of the velocity models. The sparse ocean bottom seismic data are interferomatically correlated with the model -based Green's functions for the sea floor model. This generates densely recorded ocean bottom seismic traces. Local matching filter will be applied to reduce the artifacts in the interpolated data. To mitigate the artifacts in the interferometry correlation results, an anti -aliasing theory developed will establish a fundamental criterion for numerical application of seismic interferometry to any seismic data. Mathematical Time Revisal Mirror models will be developed in MATLAB to determine the position of seismic source by comparing the phases of signals at the output terminals. Simulation will also be run using the data generated to plot a two dimensional ocean bottom seismic profile (OBS). Hence seismic interferometry can be applied during exploration for hydrocarbon and during down hole drilling to provide reliable information about complex geology.
Solar energy is used directly for drying bulk of agriculture products in the country, especially ... more Solar energy is used directly for drying bulk of agriculture products in the country, especially cocoa beans. In this paper, research work identifies practical and technological ways by which the Crank -Nicolson equation is applied to heat equations using finite difference method to develop a green house type of solar dryer used in drying cocoa beans. The mathematical model of the extended Crank -Nicholson method for the general case of the 3-D (three-dimensional) conduction equation for green house effect type dryer has been derived and simulated using the Mathwork Matlab program. The performance of dryer was then determined, using drying cocoa beans from freshness with water content of about 50%,60% and 70% to dried beans with water content of about 7% of the weight. The results show that the green house effects dryer made of polythene sheeting produces temperatures of 50 0 C to 60 0 C and dries cocoa very well within seven days with water content of 50% to dried beans with 7% of water content of the weight. Compared to the traditional method of drying cocoa in Ghana, this method can be more technologically advance and better in producing the required dryness of cocoa beans in shorter time. Other advantages of this method include the more hygienic way of drying cocoa with less foreign materials. The overall aim of this research is to develop a MATLAB-based modeling and simulation to predict the air properties, air flow rate, equilibrium moisture content of the solar dryer technology for food crop drying especially cocoa and other cash crops.
Seismic survey is a program for mapping geological structure by observation of seismic wave. Crea... more Seismic survey is a program for mapping geological structure by observation of seismic wave. Creating seismic wave with artificial sources and observing the arrival time of the waves reflected from acoustic impedance contrasts or refracted through high velocity members. Real-time vertical seismic profile (VSP) imaging provides information ahead of the drill bit that confirmed the well trajectory. A key objective was to determine the best location for the seismic source while drilling. Geological bodies like salt causes ray bending which leads to higher amplitude reflections between sediment layers and causes multiple rays scattering in the data collected. Conventional source location and interpolation methods heavily rely on the accuracy of the velocity models. In this paper interferometric techniques will be use to extract multiple scatter information in ocean bottom seismic data which will provide reliable results without knowledge of the velocity models. The sparse ocean bottom s...
Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow strea... more Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows for the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement pro...
The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signatu... more The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signature of biological significant. Explore geologically diverse landing sites by gathering scientifically compelling and well-documented set of rocks, soil samples and assemble them into a sealed container that could be returned to Earth by a future NASA mission. This presentation will give a mission concept based on AI approach using one rover and helicopter to explore the geological formation of rocks on Mars without bringing them to Earth.
Wireless technology is one of the main areas of research in the world of communication systems to... more Wireless technology is one of the main areas of research in the world of communication systems today. It is important to know that the study of wireless communication systems is incomplete without the understanding of the fabrication and operation of antennas. A vast number of RF devices such as the microwave ovens, cordless telephones and medical devices currently operate in the 2.4 GHz band. In this paper, a biquad antenna whose central working frequency is 2.445 GHz was fabricated and optimised by placing it in a mesh dish. The Biquad Antenna was tested on the first floor of the four story building at the Regent University College. Result shows that the antenna achieved 70% to 80% range of signal strength, improving the directivity of a WLAN covering as far as the third floor, the ground floor as well as the surroundings. This was achieved by placing the Biquad Antenna feed in the focal point of a mesh dish which helps to focus the radio waves onto the Biquad Antenna. Comparing t...
Solar energy is used directly for drying bulk of agriculture products in the country, especially ... more Solar energy is used directly for drying bulk of agriculture products in the country, especially cocoa beans. In this paper, research work identifies practical and technological ways by which the Crank-Nicolson equation is applied to heat equations using finite difference method to develop a green house type of solar dryer used in drying cocoa beans. The mathematical model of the extended Crank-Nicholson method for the general case of the 3-D (three-dimensional) conduction equation for green house effect type dryer has been derived and simulated using the Mathwork Matlab program. The performance of dryer was then determined, using drying cocoa beans from freshness with water content of about 50%,60% and 70% to dried beans with water content of about 7% of the weight. The results show that the green house effects dryer made of polythene sheeting produces temperatures of 500C to 600C and dries cocoa very well within seven days with water content of 50% to dried beans with 7% of water ...
Ultrasonic flow meters, as all velocity or inference t ype devices, require an adequate flow stre... more Ultrasonic flow meters, as all velocity or inference t ype devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement procedure. The relationship between velocity and viscosity, using Reynolds Number, was calculated in Microsoft Excel. The Nusselt Number was then used to plot fluid mean temperature and wall temperature diagrams in Microsoft Excel.
This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI)... more This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor. The data was processed with MATLAB neural network time series prediction algorithm to forecast NO2 concentration in Ghana by the year 2020. The average NO2 and UV aerosol index data over Accra from 2005 to 2015 was a n a l y z e w i t h Levenberg- Marquardt method for machine learning model, which forecast indicated that NO2 increased to 5.00×1015 molecules cm-2 with UV aerosol index of about - 2.5. Averaged NO2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO2 concentration in Ghana was measured as 0.692 ×1015 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×1015 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana. Key words: Ozone layer, Nitrogen dioxide, Machine learning, MATLAB.
This work presents nitrogen dioxide (NO 2) measurements from the Ozone Monitoring Instrument (OMI... more This work presents nitrogen dioxide (NO 2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor processed with MATLAB neural network time series prediction algorithm were used to forecast NO 2 concentration in Ghana by the year 2020. The average NO 2 and UV aerosol index data over Accra from 2005 to 2015 was processed with Levenberg-Marquardt method for machine learning model, which forecast indicated that NO 2 increased to 5.00×10 15 molecules cm-2 with UV aerosol index of about-2.5. Averaged NO 2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO 2 concentration in Ghana was measured as 0.692 ×10 15 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×10 15 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO 2 emission and shows that higher NO 2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO 2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
Project abstract: The goal of this work is to design an embedded piezopack power supply system (E... more Project abstract: The goal of this work is to design an embedded piezopack power supply system (EPPSS) to recharge discharged battery by means of power harvesting device proposed and implemented with Texas Instruments (TI) components. This idea is inspired by current research activity to develop enhanced power converter systems suitable for range of applications. Potential users of this technology include the designers of portable and stand-alone systems such as laptops and hand-held electronics. It has been proven that, micro to milliwatts of power can be generated from vibrating materials. In gadgets like mobile phones, television remote controllers, laptops and other devices which employ key depression for operation, mechanical vibrations are produced while pressing the key. These mechanical vibrations are converted into electrical power by a piezo crystal. Hence the EPPSS was placed under the key pads to charge the battery using the harvested power.
Over the past two decades, thousands of people, primarily Ghanaians from the country’s
Impoverish... more Over the past two decades, thousands of people, primarily Ghanaians from the country’s Impoverished north, have flocked to the Agbogbloshie scrapyard to strip and burn waste from consumer appliances and collect the valuable metals inside. Those who rely on the scrapyard for their livelihood say they have few other ways to make money, even if the fires lit to remove metals such as copper and aluminium from their plastic casings belch cancer-causing smoke. Western nations have been kicking down old computers, refrigerators and anything else electronic to west African countries like Ghana for disposal. About 40,000 tonnes of this electronic waste came into the country in 2010; this resulted in the increase of NO2 concentration in Ghana as shown in figure 3 and 4. When plastic, foam and whatever else comes into Agbogbloshie is set alight, it releases a mélange of poisons, from greenhouse gases to mercury, cadmium and lead. A 2008 study by Greenpeace found that the concentration of metals such as these in the yard’s soot-laden ground is as much as 100 times higher than normal. Another 2011 study published in the journal Environment International sampled breast milk from mothers in Accra and found elevated levels of polychlorinated biphenyls, an industrial chemical banned by 2001 United Nations treaty, due to consequences of Agbogbloshie’s smoke across the city of four million residents. The analysis performed on the data as shown in figure 4 and 5 indicates that there is consistent increased of NO2 concentration from 2005 to 2013 over Ghana. This consistent increased is shown in figure 6 with the highest concentration of 82000 mole per cm cube, hence the need for capturing technology to reduce this effect.
Many people around the world living in communities near water bodies which serve as a source of g... more Many people around the world living in communities near water bodies which serve as a source of generating income, nourishment and livelihood. Yet these communities are prone to dangers such as flooding and drought, a few of such communities include those along the Volta basin which extends from Ghana to Burkina Faso, Togo, Ivory Coast, Mali and Benin. Hence this research work will develop a system to monitor water level of Volta Lake and communicate with satellite constellation.
Wireless technology is one of the main areas of research in the world of communication systems to... more Wireless technology is one of the main areas of research in the world of communication systems today. It is important to know that the study of wireless communication systems is incomplete without the understanding of the fabrication and operation of antennas. A vast number of RF devices such as the microwave ovens, cordless telephones and medical devices currently operate in the 2.4 GHz band. In this paper, a biquad antenna whose central working frequency is 2.445 GHz was fabricated and optimised by placing it in a mesh dish. The Biquad Antenna was tested on the first floor of the four story building at the Regent University College. Result shows that the antenna achieved 70% to 80% range of signal strength, improving the directivity of a WLAN covering as far as the third floor, the ground floor as well as the surroundings. This was achieved by placing the Biquad Antenna feed in the focal point of a mesh dish which helps to focus the radio waves onto the Biquad Antenna. Comparing to omnidirectional antenna whose signal strength was 56%, the performance of the biquad antenna was better. The results from the testing of both antennas were simulated separately in a Matlab. The combined effect of these was also simulated using a parabolic reflector mathematical model which gave a new waveform propagating pattern resulting in the better performance. Key words: Biquad antenna, signal strength, omnidirectional antenna, optimisation, fabrication.
The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reyno... more The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reynolds and Nusselt number, is both a textbook and reference that engineers and technicians will want in their personal libraries. The three main objectives are: 1. A multipath meter with an integration method of velocity profile correction, to improve performance on high viscosity low Reynolds numbers applications. 2. Robustness in correcting asymmetric axial flow velocity profiles. 3. Compensation transverse flow components. Features include techniques such as velocity profile correction, accurate measurement at the lower flow range are shown in simulations.The type of oil samples which were considered are Light, Medium,Brad Penn,Heavy and Extra heavy oils. The use of analogies for modeling fluid flow,thermal and mechanical components. A brief introduction to computational fluid dynamics is presented, while any intelligent computer-literate person can run a CFD code.
The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reyno... more The optimization of liquid ultrasonic flow meter through modelling and simulation using the Reynolds and Nusselt number, is both a textbook and reference that engineers and technicians will want in their personal libraries. The three main objectives are: 1. A multipath meter with an integration method of velocity profile correction, to improve performance on high viscosity low Reynolds numbers applications. 2. Robustness in correcting asymmetric axial flow velocity profiles. 3. Compensation transverse flow components. Features include techniques such as velocity profile correction, accurate measurement at the lower flow range are shown in simulations.The type of oil samples which were considered are Light, Medium,Brad Penn,Heavy and Extra heavy oils. The use of analogies for modeling fluid flow,thermal and mechanical components. A brief introduction to computational fluid dynamics is presented, while any intelligent computer-literate person can run a CFD code.
Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow strea... more Ultrasonic flow meters, as all velocity or inference type devices, require an adequate flow stream conditioning in order to assure an accurate performance. Typical flow conditioning consists of straightening the upstream and downstream of the measuring section. The upstream section usually contains a tube bundle, which allows for the upstream section to be reduced in length. This tube bundle serves to eliminate any swirl in the flow stream before reaching the meter, presenting a symmetrical velocity profile to the turbine rotor. Some ultrasonic flow meters may produce a non-uniform pulse output, which can prove a wide span of repeatability. For such cases where is a need to correct the velocity flow profiles which affect the robustness of the integration method, this research work tries to develop a mathematical modeling and simulation in MATLAB and Microsoft Excel, with the purpose to combine the individual acoustic path measurements into a full volumetric flow rate measurement procedure. The relation between velocity and viscosity, using Reynolds Number, was calculated in Microsoft Excel. The Nusselt Number was then used to plot fluid mean temperature and wall temperature diagrams in Microsoft Excel.
Seismic survey is a program for mapping geological structure by observation of seismic wave. Crea... more Seismic survey is a program for mapping geological structure by observation of seismic wave. Creating seismic wave with artificial sources and observing the arrival time of the waves reflected from acoustic impedance contrasts or refracted through high velocity members. Real-time vertical seismic profile (VSP) imaging provides information ahead of the drill bit that confirmed the well trajectory. A key objective was to determine the best location for the seismic source while drilling. Geological bodies like salt causes ray bending which leads to higher amplitude reflections between sediment layers and causes multiple rays scattering in the data collected. Conventional source location and interpolation methods heavily rely on the accuracy of the velocity models. In this paper interferometric techniques will be use to extract multiple scatter information in ocean bottom seismic data which will provide reliable results without knowledge of the velocity models. The sparse ocean bottom seismic data are interferomatically correlated with the model -based Green's functions for the sea floor model. This generates densely recorded ocean bottom seismic traces. Local matching filter will be applied to reduce the artifacts in the interpolated data. To mitigate the artifacts in the interferometry correlation results, an anti -aliasing theory developed will establish a fundamental criterion for numerical application of seismic interferometry to any seismic data. Mathematical Time Revisal Mirror models will be developed in MATLAB to determine the position of seismic source by comparing the phases of signals at the output terminals. Simulation will also be run using the data generated to plot a two dimensional ocean bottom seismic profile (OBS). Hence seismic interferometry can be applied during exploration for hydrocarbon and during down hole drilling to provide reliable information about complex geology.
Solar energy is used directly for drying bulk of agriculture products in the country, especially ... more Solar energy is used directly for drying bulk of agriculture products in the country, especially cocoa beans. In this paper, research work identifies practical and technological ways by which the Crank -Nicolson equation is applied to heat equations using finite difference method to develop a green house type of solar dryer used in drying cocoa beans. The mathematical model of the extended Crank -Nicholson method for the general case of the 3-D (three-dimensional) conduction equation for green house effect type dryer has been derived and simulated using the Mathwork Matlab program. The performance of dryer was then determined, using drying cocoa beans from freshness with water content of about 50%,60% and 70% to dried beans with water content of about 7% of the weight. The results show that the green house effects dryer made of polythene sheeting produces temperatures of 50 0 C to 60 0 C and dries cocoa very well within seven days with water content of 50% to dried beans with 7% of water content of the weight. Compared to the traditional method of drying cocoa in Ghana, this method can be more technologically advance and better in producing the required dryness of cocoa beans in shorter time. Other advantages of this method include the more hygienic way of drying cocoa with less foreign materials. The overall aim of this research is to develop a MATLAB-based modeling and simulation to predict the air properties, air flow rate, equilibrium moisture content of the solar dryer technology for food crop drying especially cocoa and other cash crops.
This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI)... more This work presents nitrogen dioxide (NO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor. The data was processed with MATLAB neural network time series prediction algorithm to forecast NO2 concentration in Ghana by the year 2020. The average NO2 and UV aerosol index data over Accra from 2005 to 2015 was analyze with Levenberg- Marquardt method for machine learning model, which forecast indicated that NO2 increased to 5.00×1015 molecules cm-2 with UV aerosol index of about - 2.5. Averaged NO2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO2 concentration in Ghana was measured as 0.692 ×1015 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×1015 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
The steeply dipping and irregular topography of the water bottom represents a challenge to the ac... more The steeply dipping and irregular topography of the water bottom represents a challenge to the accurate imaging of the reservoirs using surface seismic methods. Creating seismic wave with artificial sources and observing the arrival time of the waves reflected from acoustic impedance contrasts or refracted through high velocity members in conventional source location and interpolation methods heavily rely on the accuracy of the velocity models. In this paper interferometric techniques will be use to extract multiple scatter information in ocean bottom seismic data which will provide reliable results with and without knowledge of the velocity models. The sparse ocean bottom seismic data are interferomatically correlated with the model – based Green’s functions for the sea floor model. This generates densely recorded ocean bottom seismic traces. Local matching filter will be applied to reduce the artifacts in the interpolated data. To mitigate the artifacts in the interferometry correlation results, an anti – aliasing theory developed will establish a fundamental criterion for numerical application of seismic interferometry to any seismic data. Mathematical Time Revisal Mirror models will be developed in MATLAB to determine the position of seismic source by comparing the phases of signals at the output terminals. Simulation will also be run using the data generated to plot a two dimensional ocean bottom seismic profile (OBS). A time migration and depth migration methods were applied to the ocean bottom seismic profile to determine which methods give accurate imaging of reservoir using the interferometric migration. Hence seismic interferometry can be applied during exploration for hydrocarbon and during down hole drilling to provide reliable information about complex geology.
The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signatu... more The Mars Rover Mission 2020 by NASA will bring a rock from Mars to Earth for the study of signature of biological significant. Explore geologically diverse landing sites by gathering scientifically compelling and well-documented set of rocks, soil samples and assemble them into a sealed container that could be returned to Earth by a future NASA mission. This presentation will give a mission concept based on AI approach using one rover and helicopter to explore the geological formation of rocks on Mars without bringing them to Earth.
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Papers by ISAAC K YEBOAH
NO2 and UV aerosol index data over Accra from 2005 to 2015 was a n a l y z e w i t h Levenberg- Marquardt method for machine learning model, which forecast indicated that NO2 increased to 5.00×1015 molecules cm-2 with UV aerosol index of about - 2.5. Averaged NO2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO2 concentration in Ghana was measured as 0.692 ×1015 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×1015 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
Key words: Ozone layer, Nitrogen dioxide, Machine learning, MATLAB.
Impoverished north, have flocked to the Agbogbloshie scrapyard to strip and burn waste from consumer appliances
and collect the valuable metals inside. Those who rely on the scrapyard for their livelihood say they have few other
ways to make money, even if the fires lit to remove metals such as copper and aluminium from their plastic casings
belch cancer-causing smoke. Western nations have been kicking down old computers, refrigerators and anything
else electronic to west African countries like Ghana for disposal. About 40,000 tonnes of this electronic waste came
into the country in 2010; this resulted in the increase of NO2 concentration in Ghana as shown in figure 3 and 4.
When plastic, foam and whatever else comes into Agbogbloshie is set alight, it releases a mélange of poisons, from
greenhouse gases to mercury, cadmium and lead. A 2008 study by Greenpeace found that the concentration of
metals such as these in the yard’s soot-laden ground is as much as 100 times higher than normal. Another 2011
study published in the journal Environment International sampled breast milk from mothers in Accra and found
elevated levels of polychlorinated biphenyls, an industrial chemical banned by 2001 United Nations treaty, due to consequences of Agbogbloshie’s smoke across the city of four million residents. The analysis performed on the
data as shown in figure 4 and 5 indicates that there is consistent increased of NO2 concentration from 2005 to
2013 over Ghana. This consistent increased is shown in figure 6 with the highest concentration of 82000 mole per
cm cube, hence the need for capturing technology to reduce this effect.
Key words: Biquad antenna, signal strength, omnidirectional antenna, optimisation, fabrication.
NO2 and UV aerosol index data over Accra from 2005 to 2015 was a n a l y z e w i t h Levenberg- Marquardt method for machine learning model, which forecast indicated that NO2 increased to 5.00×1015 molecules cm-2 with UV aerosol index of about - 2.5. Averaged NO2 over a period of 2005 to 2015 for Ghana were observed which indicated that, in 2005 NO2 concentration in Ghana was measured as 0.692 ×1015 molecules cm-2 with UV aerosol index of about 4.0, which increased to 0.81×1015 molecules cm-2 with aerosol index of about 5.2 in 2010. This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
Key words: Ozone layer, Nitrogen dioxide, Machine learning, MATLAB.
Impoverished north, have flocked to the Agbogbloshie scrapyard to strip and burn waste from consumer appliances
and collect the valuable metals inside. Those who rely on the scrapyard for their livelihood say they have few other
ways to make money, even if the fires lit to remove metals such as copper and aluminium from their plastic casings
belch cancer-causing smoke. Western nations have been kicking down old computers, refrigerators and anything
else electronic to west African countries like Ghana for disposal. About 40,000 tonnes of this electronic waste came
into the country in 2010; this resulted in the increase of NO2 concentration in Ghana as shown in figure 3 and 4.
When plastic, foam and whatever else comes into Agbogbloshie is set alight, it releases a mélange of poisons, from
greenhouse gases to mercury, cadmium and lead. A 2008 study by Greenpeace found that the concentration of
metals such as these in the yard’s soot-laden ground is as much as 100 times higher than normal. Another 2011
study published in the journal Environment International sampled breast milk from mothers in Accra and found
elevated levels of polychlorinated biphenyls, an industrial chemical banned by 2001 United Nations treaty, due to consequences of Agbogbloshie’s smoke across the city of four million residents. The analysis performed on the
data as shown in figure 4 and 5 indicates that there is consistent increased of NO2 concentration from 2005 to
2013 over Ghana. This consistent increased is shown in figure 6 with the highest concentration of 82000 mole per
cm cube, hence the need for capturing technology to reduce this effect.
Key words: Biquad antenna, signal strength, omnidirectional antenna, optimisation, fabrication.
This paper also examined the changes of monthly Ozone layer surface depletion from January to July 2010 over Africa due to NO2 emission and shows that higher NO2 emission concentration was found in the Tema Industrial Area and Agbogbloshie areas in Accra. The sources were identified and their evolution increased in the following order of years, October 2005, 2008, 2010 and 2013. Hence, to reduce the effect, the paper proposed a Biological Nitrogen Fixation (BNF) mathematical model for Accra using ecosystem capturing technology and CO2 capturing technology for factories as well as reducing of human activities like deforestation in Ghana.
Explore geologically diverse landing sites by gathering scientifically compelling and well-documented set of rocks, soil samples and assemble them into a sealed container that could be returned to Earth by a future NASA mission.
This presentation will give a mission concept based on AI approach using one rover and helicopter to explore the geological formation of rocks on Mars without bringing them to Earth.