collins edet | Cross River University of Technology (original) (raw)

Papers by collins edet

Understanding the relationship between the variations of meteorological parameters is vital in ta... more Understanding the relationship between the variations of meteorological parameters is vital in tackling the climatic problem. This paper presents methods for analyzing parameters that relate directly and indirectly to each other and accurate methods for interpreting their results. Using obtained data for 14 years and calculated data for other parameters, we adopt the Mann-Kendall (M-K) test for the trend analysis of the annual and seasonal variations, the correlation matrixes, and linear regression pair plots to discern the relationship between all parameters using the python programming software. To crystalize results, partial derivatives relating the equivalent potential temperature (EPT) for a pseudo-adiabatic process with parameters affecting its variation from equations are being obtained. The magnitude of these derivatives' gradients was used to bolster regression results, showing the mixing ratio (MR) of air as the parameter with the most effect on EPT variation. The MK t...

arXiv: Quantum Physics, 2020

In this article, the Yukawa potential is scrutinized taking into consideration the effects of mag... more In this article, the Yukawa potential is scrutinized taking into consideration the effects of magnetic and AB flux fields within the non-relativistic regime using the factorization method. The energy equation and wave function of the system are obtained in close form. We find that the all-encompassing effects result in a strongly attractive system and consequently there is a significant upward shift in the bound state energy of the system. We also find that to achieve a low-energy medium for the Yukawa potential, weak magnetic field is required, however the AB flux field can be used as a controller. The magnetic and AB fields eliminates the degeneracy from the spectra. From our findings, it could be concluded that to manipulate the energy spectra of this system, the AB-flux and magnetic field will do so greatly. The results from this study can be applied in condensed matter physics, atomic and molecular physics.

European Physical Journal Plus, 2021

In this research work, we investigate the 2D Schrodinger equation with improved ultra-generalized... more In this research work, we investigate the 2D Schrodinger equation with improved ultra-generalized exponential-hyperbolic potential (IUGE-HP) is scrutinized taking into consideration the effects external magnetic and Aharonov–Bohm (AB) fields within the non-relativistic quantum mechanics regime. The Schrodinger equation in 2D for this consideration is solved using the asymptotic iteration method (AIM), and the energy equation and eigenfunction for the IUGE-HP in the presence of magnetic and AB fields are obtained in a compact form. The numerical energy spectra are analyzed, and it is observed that the presence of the external fields eliminates degeneracy from the spectra and the different values of the control parameter causes shifts in the energy spectra. The thermal and magnetic properties of the IUGE-HP in the presence of this external fields are duly investigated. The variations of the thermal and magnetic properties with control parameter are analyzed for negative \left( {\tau...

In this paper, we obtained the exact bound state energy spectrum of the Schrodinger equation with... more In this paper, we obtained the exact bound state energy spectrum of the Schrodinger equation with energy dependent molecular Kratzer potential using asymptotic iteration method (AIM). The corresponding wave function expressed in terms of the confluent hypergeometric function was also obtained. As a special case, when the energy slope parameter in the energy-dependent molecular Kratzer potential is set to zero, then the well-known molecular Kratzer potential is recovered. Numerical results for the energy eigenvlaues are also obtained for different quantum states, in the presence and absence of the energy slope parameter. These results are discussed extensively using graphical representation. Our results are seen to agree with the results in literature.

In this study, the impacts of TD on the energy spectra and thermal properties of LiH, TiC and I2 ... more In this study, the impacts of TD on the energy spectra and thermal properties of LiH, TiC and I2 diatomic molecules is considered. The Schrodinger equation in cosmic string spacetime is solved with the generalized Morse potential using the well-known (NU) method. The energy spectra and eigenfunction are obtained respectively. The energy spectra is used to obtain the partition function which is then used to evaluate the thermal properties of the system is evaluated accordingly. We find that the energy spectra in the presence of the TD differ from their flat Minkowski spacetime analogue. The effects of the deformation parameter and TD on the thermal properties of the system is also analysed in detail. We observe that the specific heat capacity of the system tends to exhibit quasi-saturation as the deformation parameter and topological defect approaches unity. The results of our study can be applied in the astrophysical situation where these modifications exist in the understanding of ...

Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as wel... more Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as well as calculated refractivity, equivalent potential temperature (EPT) for a pseudo-adiabatic process, and field strength in Calabar, Southern Nigeria has been analyzed using Mann-Kendall trend test and Sens slope estimator. Data of the meteorological parameters were obtained from the Nigerian Meteorological Agency (NiMet) in Calabar for 14 years (2005 - 2018). Results show that the maximum and average temperature, atmospheric pressure, refractivity, EPT and field strength all exhibited a positive Kendall Z value with 2.52, 0.33, 3.83, 0.77, 0.44 and 3.18 respectively which indicated an increasing trend over time, with only maximum temperature, atmospheric pressure and field strength showing a significant increase at 5% (0.05) level of significance, since their calculated p-values (0.012, 0.0001, and 0.001) were less than 0.05. The relative humidity and minimum ambient temperature showed a...

Ecl�tica Qu�mica Journal

In this study, an approximate solution of the Schr�dinger equation for the q-deformed Hulthen-qua... more In this study, an approximate solution of the Schr�dinger equation for the q-deformed Hulthen-quadratic exponential-type potential model within the framework of the Nikiforov�Uvarov method was obtained. The bound state energy equation and the corresponding eigenfunction was obtained. The energy spectrum is applied to study H2, HCl, CO and LiH diatomic molecules. The effect of the deformation parameters and other potential parameters on the energy spectra of the system were graphically and numerically analyzed in detail. Special cases were considered when the potential parameters were altered, resulting in deformed Hulthen potential, Hulthen potential, deformed quadratic exponential-type potential and quadratic exponential-type potential. The energy eigenvalues expressions agreed with what obtained in literature. Finally, the results can find many applications in quantum chemistry, atomic and molecular physics.

The European Physical Journal D

In this study, the Klein–Gordon equation (KGE) was solved with the generalized Mobius square (GMS... more In this study, the Klein–Gordon equation (KGE) was solved with the generalized Mobius square (GMS) potential using the functional analysis approach (FAA) in D-dimensions. By employing the Pekeris-type approximation scheme, the relativistic and nonrelativistic bound state energies were obtained in closed form. Also, the expression for the scattering state phase shift of GMS potential was obtained in D-dimensions. The effects of the vibrational and rotational quantum number on the vibrational energies and the scattering state phase shift of nitrogen monoiodide (NI) diatomic molecule were studied numerically and graphically at different dimensions. An interesting result of this study is the inter-dimensional degeneracy symmetry for scattering phase shift of the NI diatomic molecule. Hence, this concept is applicable in the areas of chemical physics, nuclear and particle physics.Graphic abstract: In this study, the relativistic and nonrelativistic bound state energies of KGE with the GMS potential were obtained in D-dimensions using the FAA. In addition, the scattering state phase shift of GMS potential was obtained in D-dimensions. The effects of the vibrational and rotational quantum number on the vibrational energies and the scattering state phase shift of NI diatomic molecule were studied. The inter-dimensional degeneracy symmetry for scattering phase shift of the NI diatomic molecule was obtained at unique quantum states.

Theoretical and Applied Climatology

Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as wel... more Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as well as calculated refractivity, equivalent potential temperature (EPT) for a pseudo-adiabatic process, and field strength in Calabar, Southern Nigeria has been analyzed using Mann-Kendall (M-K) trend test and Sen’s slope estimator (SSE). Data of the meteorological parameters were obtained from the Nigerian Meteorological Agency (NiMet) in Calabar for 14 years (2005–2018). Results show that the maximum and average temperature, atmospheric pressure, refractivity, EPT, and field strength all exhibited a positive Kendall Z value with 2.52, 0.33, 3.83, 0.77, 0.44, and 3.18 respectively which indicated an increase in trend over time, with only maximum temperature, atmospheric pressure and field strength showing a significant increase at 5% (0.05) level of significance, since their calculated p values (0.012, 0.0001, and 0.001) were less than 0.05. The relative humidity and minimum ambient temperature had a decrease in trend over time as they both had negative Kendall Z values (− 0.11 and − 1.09 respectively); however, together with the average ambient temperature and refractivity, their trend was not significant at 5% level of significance since their calculated p values were all more than 0.05. Linear regression, correlation, and partial differentiation showed that relative humidity has the most effect on the changes in seasonal refractivity and an indirect relationship with field strength variability. The novel relationship between EPT and refractivity has been discovered to be very strong and positive. Descriptive statistics has been used to portray the seasonal and annual trend of all parameters.

Physica E: Low-dimensional Systems and Nanostructures

Asian Journal of Physical and Chemical Sciences, 2017

Effects of some meteorological parameters on wind energy potential in Calabar have been investiga... more Effects of some meteorological parameters on wind energy potential in Calabar have been investigated. The data on wind speed, temperature and relative humidity was obtained by in-situ measurement approach. The relationships between the given meteorological parameters were obtained from plots of wind speed against temperature and relative humidity as independent variables. Statistical correlation of wind speed values and the two meteorological parameters was done, which yielded 0.89 as correlation coefficient for wind speed and temperature,-0.88 for wind speed and relative humidity with the relevant plots; these clearly shows that of all the two meteorological parameters, temperature contributes most to the wind speed in Calabar. On the other hand, the negative correlation of wind speed and relative humidity (%) shows that as humidity increases, wind speed decreases.

Asian Journal of Physical and Chemical Sciences, 2017

Effect of Additives on the Thermal Conductivity of Loamy Soil in CRUTECH farm, Calabar, Nigeria w... more Effect of Additives on the Thermal Conductivity of Loamy Soil in CRUTECH farm, Calabar, Nigeria was investigated. The loamy soil and various manure samples was measured in simple ratio of 3 to 1 and thoroughly mixed, then dissolved in water and air dried using an oven. A Lee's disc apparatus was used to determine the thermal conductivity of the various samples (Loamy Soil, loamy soil + Urea, Loamy Soil + Cow dung, Loamy Soil + Poultry dung and Loamy Soil + NPK). The results reveal that at no moisture content (after heating), loamy soil sample without additive has a thermal conductivity of 0.096W/m K and also thermal conductivity values varied with addition of Cow dung (0.135 W/m K), poultry dung(0.231 W/m K), urea(0.140 W/m K) and NPK(0.108 W/m K). It clearly shows that the thermal conductivity of loamy soil increases with additives. It was also observed that loamy soil mixed with fertilizer produced a thermal conductivity higher than loamy soil mixed with organic manure. Therefore farmers are advised to always dope soil in their farmland with (organic or inorganic manure), this will improve yield, since plants growth are influenced by the microclimate which is influenced by thermal properties of soils.

American International Journal of Research in Science, Technology, Engineering & Mathematics, 2017

Effects of variations in meteorological parameters of Atmospheric Pressure, Relative Humidity and... more Effects of variations in meteorological parameters of Atmospheric Pressure, Relative Humidity and Temperature on radio refractivity in Calabar have been investigated. The data on Temperature, Relative Humidity and Atmospheric Pressure obtained from the Nigeria Metrological Agency (NIMET) was analysed for twelve months in year 2016. The relationships between the given meteorological parameters are easily obtained from plots of refractivity N against P, H and T as independent variables. Statistical correlation of the calculated refractivity values and all three meteorological parameters was done, which yielded 0.71 as correlation coefficient for Refractivity and Relative Humidity, -0.16 for Refractivity and Atmospheric Pressure, and -0.17 for Refractivity and Temperature with the relevant plots, these clearly shows that of all
the three met. parameters, Relative Humidity contributes most to variation in Refractivity.

In this article, computational Absorption Rate ( SAR ) of Electromagnetic analysis and f... more In this article, computational Absorption Rate ( SAR ) of Electromagnetic analysis and field measurement evaluation in studying the radiation on selected biological tissues was carried out. The Specific possible penetrating and harmful effects influenced by an electromagnetic radiation into human tissues due to mobile phones was critically analysed. In order to effectively estimate and analyse the electric field and SAR within the human head, mathematical models which combines Green’s function analysis of the human head which is modeled by a double considered. Specifically, the effelayered sphere and (Electric Field Integral Equation) EFIE was cts at Universal Mobile Telecommunication System(UMTS) operating frequency which is 2155MHz and gap distances of 0.5cm to 4.0cm at an interval of 0.5 between the mobile phone and the human head was the focus. It was observed from the results that calculate d penetrated electric field transmitted from the mobile phone and the corresponding SAR values is decreased by about 90% if the mobile phone moves from 0.5cm to 4cm away from the body. Also from the results, it is found that the trend of theoretically obta ined SAR curve was smoothly decaying exponentially as distance increased and that of experimental was not smooth but SAR decreased with increase in distance. A correlation coefficient of approximately 0.8 was obtained for all three tissue theory and experi ment SAR correlated respectively. From this study, this may imply that by increasing the distance between human head and mobile phone, the effect of absorbed Radio Frequency Electromagnetic Field radiations can be rendered insignificant.

Seasonal variation of radio refractivity in Calabar in the year 2016 was investigated.... more Seasonal variation of radio refractivity in Calabar in the year 2016 was investigated. The daily averages of radio refractivity were calculated from the temperature, relative humidity and atmospheric pressure data obtained from the Nigeria Meteorological Agency (NIMET). In order to get the seasonal radio refractivity, daily averages of refractivity for each of the six months of the dry season (i.e. January, February, March, October, November and December) and six months of the rainy season (i.e. April, May, June, July, August and September) were calculated. Result shows that radio refractivity was higher in rainy season than dry season in Calabar in the year 2016.This we assume is due to the difference in the moisture content of the atmosphere in the two seasons

Monthly variation of radio refractivity in Calabar in the year 2016 was investigated. The daily a... more Monthly variation of radio refractivity in Calabar in the year 2016 was investigated. The daily averages of radio refractivity were calculated from the temperature, relative humidity and atmospheric pressure data obtained from the Nigeria Meteorological Agency (NIMET). This was analysed for twelve months in year 2016 and radio refractivity was calculated. The maximum value of 472.0 was obtained in March and the minimum value is about 324.78 which was obtained in January. Results show that radio refractivity pattern variation in Calabar in 2016 varied slightly due to the almost uniform weather condition of Calabar. The radio refractivity data obtained in this study will provide radio engineers with adequate information relevant for the design of communication systems in Calabar.

Conference Presentations by collins edet

This study investigates the contributions of cosmic radiation to background radiation dose in a s... more This study investigates the contributions of cosmic radiation to background radiation dose in a selected location in Calabar. The study area was divided into thirteen (13) points and investigated. An in-situ approach measurement was adopted using SOEKS ecotester Geiger counter + food nitrate tester. The Outdoor Annual Exposure Dose Rate (OAEDR) of each location was calculated. The measured average cosmic radiation and calculated values were found to contribute to background radiation for all the points as 0.4Sv/yr OAEDR and 0.64mSv/yr respectively while 1.0msv/yr is the threshold value recommended by International Commission on Radiological Protection(ICRP). However, the results obtained do not pose any threat to health.

This study was faction out with the aim of determining the quality deterioration of some commonly... more This study was faction out with the aim of determining the quality deterioration of some commonly used drugs (Vitamin C, Pracetamol, Panadol, Aspirin and Flagy), using well known parameters like electrical conductivity, charge density and pH. The use of medicine is often complex, the supply cycle needs to be well managed to prevent all types of wastage, including abuse and use of expired ones. This wastage reduces the quantity of medicines available to patients and therefore the quality of health care they receive.The data obtained from the parameters (electrical conductivity, charge density and pH) were analysed and an equation developed using well known relations to establish a relationship between charge density, electrical conductivity, mass, time and charge. The relatively high conductivity value of the unexpired drugs shows the high number of ions available in the conduction process of absorption by the body fluid. While the relatively low conductivity values from the expired drugs shows that it will take longer time to be absorbed by the body cells. This is perfectly in agreement with the charge density obtained from the physical equation developed.

Understanding the relationship between the variations of meteorological parameters is vital in ta... more Understanding the relationship between the variations of meteorological parameters is vital in tackling the climatic problem. This paper presents methods for analyzing parameters that relate directly and indirectly to each other and accurate methods for interpreting their results. Using obtained data for 14 years and calculated data for other parameters, we adopt the Mann-Kendall (M-K) test for the trend analysis of the annual and seasonal variations, the correlation matrixes, and linear regression pair plots to discern the relationship between all parameters using the python programming software. To crystalize results, partial derivatives relating the equivalent potential temperature (EPT) for a pseudo-adiabatic process with parameters affecting its variation from equations are being obtained. The magnitude of these derivatives' gradients was used to bolster regression results, showing the mixing ratio (MR) of air as the parameter with the most effect on EPT variation. The MK t...

arXiv: Quantum Physics, 2020

In this article, the Yukawa potential is scrutinized taking into consideration the effects of mag... more In this article, the Yukawa potential is scrutinized taking into consideration the effects of magnetic and AB flux fields within the non-relativistic regime using the factorization method. The energy equation and wave function of the system are obtained in close form. We find that the all-encompassing effects result in a strongly attractive system and consequently there is a significant upward shift in the bound state energy of the system. We also find that to achieve a low-energy medium for the Yukawa potential, weak magnetic field is required, however the AB flux field can be used as a controller. The magnetic and AB fields eliminates the degeneracy from the spectra. From our findings, it could be concluded that to manipulate the energy spectra of this system, the AB-flux and magnetic field will do so greatly. The results from this study can be applied in condensed matter physics, atomic and molecular physics.

European Physical Journal Plus, 2021

In this research work, we investigate the 2D Schrodinger equation with improved ultra-generalized... more In this research work, we investigate the 2D Schrodinger equation with improved ultra-generalized exponential-hyperbolic potential (IUGE-HP) is scrutinized taking into consideration the effects external magnetic and Aharonov–Bohm (AB) fields within the non-relativistic quantum mechanics regime. The Schrodinger equation in 2D for this consideration is solved using the asymptotic iteration method (AIM), and the energy equation and eigenfunction for the IUGE-HP in the presence of magnetic and AB fields are obtained in a compact form. The numerical energy spectra are analyzed, and it is observed that the presence of the external fields eliminates degeneracy from the spectra and the different values of the control parameter causes shifts in the energy spectra. The thermal and magnetic properties of the IUGE-HP in the presence of this external fields are duly investigated. The variations of the thermal and magnetic properties with control parameter are analyzed for negative \left( {\tau...

In this paper, we obtained the exact bound state energy spectrum of the Schrodinger equation with... more In this paper, we obtained the exact bound state energy spectrum of the Schrodinger equation with energy dependent molecular Kratzer potential using asymptotic iteration method (AIM). The corresponding wave function expressed in terms of the confluent hypergeometric function was also obtained. As a special case, when the energy slope parameter in the energy-dependent molecular Kratzer potential is set to zero, then the well-known molecular Kratzer potential is recovered. Numerical results for the energy eigenvlaues are also obtained for different quantum states, in the presence and absence of the energy slope parameter. These results are discussed extensively using graphical representation. Our results are seen to agree with the results in literature.

In this study, the impacts of TD on the energy spectra and thermal properties of LiH, TiC and I2 ... more In this study, the impacts of TD on the energy spectra and thermal properties of LiH, TiC and I2 diatomic molecules is considered. The Schrodinger equation in cosmic string spacetime is solved with the generalized Morse potential using the well-known (NU) method. The energy spectra and eigenfunction are obtained respectively. The energy spectra is used to obtain the partition function which is then used to evaluate the thermal properties of the system is evaluated accordingly. We find that the energy spectra in the presence of the TD differ from their flat Minkowski spacetime analogue. The effects of the deformation parameter and TD on the thermal properties of the system is also analysed in detail. We observe that the specific heat capacity of the system tends to exhibit quasi-saturation as the deformation parameter and topological defect approaches unity. The results of our study can be applied in the astrophysical situation where these modifications exist in the understanding of ...

Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as wel... more Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as well as calculated refractivity, equivalent potential temperature (EPT) for a pseudo-adiabatic process, and field strength in Calabar, Southern Nigeria has been analyzed using Mann-Kendall trend test and Sens slope estimator. Data of the meteorological parameters were obtained from the Nigerian Meteorological Agency (NiMet) in Calabar for 14 years (2005 - 2018). Results show that the maximum and average temperature, atmospheric pressure, refractivity, EPT and field strength all exhibited a positive Kendall Z value with 2.52, 0.33, 3.83, 0.77, 0.44 and 3.18 respectively which indicated an increasing trend over time, with only maximum temperature, atmospheric pressure and field strength showing a significant increase at 5% (0.05) level of significance, since their calculated p-values (0.012, 0.0001, and 0.001) were less than 0.05. The relative humidity and minimum ambient temperature showed a...

Ecl�tica Qu�mica Journal

In this study, an approximate solution of the Schr�dinger equation for the q-deformed Hulthen-qua... more In this study, an approximate solution of the Schr�dinger equation for the q-deformed Hulthen-quadratic exponential-type potential model within the framework of the Nikiforov�Uvarov method was obtained. The bound state energy equation and the corresponding eigenfunction was obtained. The energy spectrum is applied to study H2, HCl, CO and LiH diatomic molecules. The effect of the deformation parameters and other potential parameters on the energy spectra of the system were graphically and numerically analyzed in detail. Special cases were considered when the potential parameters were altered, resulting in deformed Hulthen potential, Hulthen potential, deformed quadratic exponential-type potential and quadratic exponential-type potential. The energy eigenvalues expressions agreed with what obtained in literature. Finally, the results can find many applications in quantum chemistry, atomic and molecular physics.

The European Physical Journal D

In this study, the Klein–Gordon equation (KGE) was solved with the generalized Mobius square (GMS... more In this study, the Klein–Gordon equation (KGE) was solved with the generalized Mobius square (GMS) potential using the functional analysis approach (FAA) in D-dimensions. By employing the Pekeris-type approximation scheme, the relativistic and nonrelativistic bound state energies were obtained in closed form. Also, the expression for the scattering state phase shift of GMS potential was obtained in D-dimensions. The effects of the vibrational and rotational quantum number on the vibrational energies and the scattering state phase shift of nitrogen monoiodide (NI) diatomic molecule were studied numerically and graphically at different dimensions. An interesting result of this study is the inter-dimensional degeneracy symmetry for scattering phase shift of the NI diatomic molecule. Hence, this concept is applicable in the areas of chemical physics, nuclear and particle physics.Graphic abstract: In this study, the relativistic and nonrelativistic bound state energies of KGE with the GMS potential were obtained in D-dimensions using the FAA. In addition, the scattering state phase shift of GMS potential was obtained in D-dimensions. The effects of the vibrational and rotational quantum number on the vibrational energies and the scattering state phase shift of NI diatomic molecule were studied. The inter-dimensional degeneracy symmetry for scattering phase shift of the NI diatomic molecule was obtained at unique quantum states.

Theoretical and Applied Climatology

Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as wel... more Trend analysis of meteorological parameters (temperature, pressure, and relative humidity) as well as calculated refractivity, equivalent potential temperature (EPT) for a pseudo-adiabatic process, and field strength in Calabar, Southern Nigeria has been analyzed using Mann-Kendall (M-K) trend test and Sen’s slope estimator (SSE). Data of the meteorological parameters were obtained from the Nigerian Meteorological Agency (NiMet) in Calabar for 14 years (2005–2018). Results show that the maximum and average temperature, atmospheric pressure, refractivity, EPT, and field strength all exhibited a positive Kendall Z value with 2.52, 0.33, 3.83, 0.77, 0.44, and 3.18 respectively which indicated an increase in trend over time, with only maximum temperature, atmospheric pressure and field strength showing a significant increase at 5% (0.05) level of significance, since their calculated p values (0.012, 0.0001, and 0.001) were less than 0.05. The relative humidity and minimum ambient temperature had a decrease in trend over time as they both had negative Kendall Z values (− 0.11 and − 1.09 respectively); however, together with the average ambient temperature and refractivity, their trend was not significant at 5% level of significance since their calculated p values were all more than 0.05. Linear regression, correlation, and partial differentiation showed that relative humidity has the most effect on the changes in seasonal refractivity and an indirect relationship with field strength variability. The novel relationship between EPT and refractivity has been discovered to be very strong and positive. Descriptive statistics has been used to portray the seasonal and annual trend of all parameters.

Physica E: Low-dimensional Systems and Nanostructures

Asian Journal of Physical and Chemical Sciences, 2017

Effects of some meteorological parameters on wind energy potential in Calabar have been investiga... more Effects of some meteorological parameters on wind energy potential in Calabar have been investigated. The data on wind speed, temperature and relative humidity was obtained by in-situ measurement approach. The relationships between the given meteorological parameters were obtained from plots of wind speed against temperature and relative humidity as independent variables. Statistical correlation of wind speed values and the two meteorological parameters was done, which yielded 0.89 as correlation coefficient for wind speed and temperature,-0.88 for wind speed and relative humidity with the relevant plots; these clearly shows that of all the two meteorological parameters, temperature contributes most to the wind speed in Calabar. On the other hand, the negative correlation of wind speed and relative humidity (%) shows that as humidity increases, wind speed decreases.

Asian Journal of Physical and Chemical Sciences, 2017

Effect of Additives on the Thermal Conductivity of Loamy Soil in CRUTECH farm, Calabar, Nigeria w... more Effect of Additives on the Thermal Conductivity of Loamy Soil in CRUTECH farm, Calabar, Nigeria was investigated. The loamy soil and various manure samples was measured in simple ratio of 3 to 1 and thoroughly mixed, then dissolved in water and air dried using an oven. A Lee's disc apparatus was used to determine the thermal conductivity of the various samples (Loamy Soil, loamy soil + Urea, Loamy Soil + Cow dung, Loamy Soil + Poultry dung and Loamy Soil + NPK). The results reveal that at no moisture content (after heating), loamy soil sample without additive has a thermal conductivity of 0.096W/m K and also thermal conductivity values varied with addition of Cow dung (0.135 W/m K), poultry dung(0.231 W/m K), urea(0.140 W/m K) and NPK(0.108 W/m K). It clearly shows that the thermal conductivity of loamy soil increases with additives. It was also observed that loamy soil mixed with fertilizer produced a thermal conductivity higher than loamy soil mixed with organic manure. Therefore farmers are advised to always dope soil in their farmland with (organic or inorganic manure), this will improve yield, since plants growth are influenced by the microclimate which is influenced by thermal properties of soils.

American International Journal of Research in Science, Technology, Engineering & Mathematics, 2017

Effects of variations in meteorological parameters of Atmospheric Pressure, Relative Humidity and... more Effects of variations in meteorological parameters of Atmospheric Pressure, Relative Humidity and Temperature on radio refractivity in Calabar have been investigated. The data on Temperature, Relative Humidity and Atmospheric Pressure obtained from the Nigeria Metrological Agency (NIMET) was analysed for twelve months in year 2016. The relationships between the given meteorological parameters are easily obtained from plots of refractivity N against P, H and T as independent variables. Statistical correlation of the calculated refractivity values and all three meteorological parameters was done, which yielded 0.71 as correlation coefficient for Refractivity and Relative Humidity, -0.16 for Refractivity and Atmospheric Pressure, and -0.17 for Refractivity and Temperature with the relevant plots, these clearly shows that of all
the three met. parameters, Relative Humidity contributes most to variation in Refractivity.

In this article, computational Absorption Rate ( SAR ) of Electromagnetic analysis and f... more In this article, computational Absorption Rate ( SAR ) of Electromagnetic analysis and field measurement evaluation in studying the radiation on selected biological tissues was carried out. The Specific possible penetrating and harmful effects influenced by an electromagnetic radiation into human tissues due to mobile phones was critically analysed. In order to effectively estimate and analyse the electric field and SAR within the human head, mathematical models which combines Green’s function analysis of the human head which is modeled by a double considered. Specifically, the effelayered sphere and (Electric Field Integral Equation) EFIE was cts at Universal Mobile Telecommunication System(UMTS) operating frequency which is 2155MHz and gap distances of 0.5cm to 4.0cm at an interval of 0.5 between the mobile phone and the human head was the focus. It was observed from the results that calculate d penetrated electric field transmitted from the mobile phone and the corresponding SAR values is decreased by about 90% if the mobile phone moves from 0.5cm to 4cm away from the body. Also from the results, it is found that the trend of theoretically obta ined SAR curve was smoothly decaying exponentially as distance increased and that of experimental was not smooth but SAR decreased with increase in distance. A correlation coefficient of approximately 0.8 was obtained for all three tissue theory and experi ment SAR correlated respectively. From this study, this may imply that by increasing the distance between human head and mobile phone, the effect of absorbed Radio Frequency Electromagnetic Field radiations can be rendered insignificant.

Seasonal variation of radio refractivity in Calabar in the year 2016 was investigated.... more Seasonal variation of radio refractivity in Calabar in the year 2016 was investigated. The daily averages of radio refractivity were calculated from the temperature, relative humidity and atmospheric pressure data obtained from the Nigeria Meteorological Agency (NIMET). In order to get the seasonal radio refractivity, daily averages of refractivity for each of the six months of the dry season (i.e. January, February, March, October, November and December) and six months of the rainy season (i.e. April, May, June, July, August and September) were calculated. Result shows that radio refractivity was higher in rainy season than dry season in Calabar in the year 2016.This we assume is due to the difference in the moisture content of the atmosphere in the two seasons

Monthly variation of radio refractivity in Calabar in the year 2016 was investigated. The daily a... more Monthly variation of radio refractivity in Calabar in the year 2016 was investigated. The daily averages of radio refractivity were calculated from the temperature, relative humidity and atmospheric pressure data obtained from the Nigeria Meteorological Agency (NIMET). This was analysed for twelve months in year 2016 and radio refractivity was calculated. The maximum value of 472.0 was obtained in March and the minimum value is about 324.78 which was obtained in January. Results show that radio refractivity pattern variation in Calabar in 2016 varied slightly due to the almost uniform weather condition of Calabar. The radio refractivity data obtained in this study will provide radio engineers with adequate information relevant for the design of communication systems in Calabar.

This study investigates the contributions of cosmic radiation to background radiation dose in a s... more This study investigates the contributions of cosmic radiation to background radiation dose in a selected location in Calabar. The study area was divided into thirteen (13) points and investigated. An in-situ approach measurement was adopted using SOEKS ecotester Geiger counter + food nitrate tester. The Outdoor Annual Exposure Dose Rate (OAEDR) of each location was calculated. The measured average cosmic radiation and calculated values were found to contribute to background radiation for all the points as 0.4Sv/yr OAEDR and 0.64mSv/yr respectively while 1.0msv/yr is the threshold value recommended by International Commission on Radiological Protection(ICRP). However, the results obtained do not pose any threat to health.

This study was faction out with the aim of determining the quality deterioration of some commonly... more This study was faction out with the aim of determining the quality deterioration of some commonly used drugs (Vitamin C, Pracetamol, Panadol, Aspirin and Flagy), using well known parameters like electrical conductivity, charge density and pH. The use of medicine is often complex, the supply cycle needs to be well managed to prevent all types of wastage, including abuse and use of expired ones. This wastage reduces the quantity of medicines available to patients and therefore the quality of health care they receive.The data obtained from the parameters (electrical conductivity, charge density and pH) were analysed and an equation developed using well known relations to establish a relationship between charge density, electrical conductivity, mass, time and charge. The relatively high conductivity value of the unexpired drugs shows the high number of ions available in the conduction process of absorption by the body fluid. While the relatively low conductivity values from the expired drugs shows that it will take longer time to be absorbed by the body cells. This is perfectly in agreement with the charge density obtained from the physical equation developed.