Browsing by Author "Isah, S.H."

Now showing 1 - 6 of 6
  • Thumbnail Image
    ItemOpen Access
    Assessment Of Outdoor Radiation Levels And Radiological Health Hazards In Abzat Quarrying Site In Keffi, Nasarawa State.
    (Department Of Library And Information Science, Faculty Of Education, Nasarawa State University, Keffi., 2021-06-04) Idris, M.M.; Isah, S.H.; Iliya, M.M.; Wada, H.M.; Ma'aji, U.M.
    In this study, the assessement of the outdoor background radiation levels in Abzat quarrying sites in Keffi, Nasarawa State has been studied. The outdoor in-situ background exposure rate level for thirty (30) quarryng spots were done using a well calibrated portable halogen-quenched Geiger Muller (GM) detector (Inspector alert nuclear radiation monitor SN: 3544) at 1 m hieght above above ground level. The spots where the measurement were taken, a Global Positioning System (GPS) was used to record the geopoints. Radiological health hazards parameters and radiation effective doses to different body organs were evaluated using the measured exposure rates values. The values of radiological hazard paramaters obtained were compared with recommended permissible limits set by International Commission on Radiological Protection (ICRP) and United Nations Scientific Committee on the effect of Atomic Radiation (UNSCEAR) for hazard evaluation.. The mean values of the outdoor background exposure levels (0.0945 mRh'1), absorbed dose rates (822.44 nGylr1) and excess lifetime cancer risk (3.53.x 10**;) arc higher than the recommended safe limits of 0.013 mRh'1, 84.0 nGyh'1, 0.29xl0'3 respectively .as recommended by UNSCEAR and ICRP. The mean annual effective dose equivalent (1.00 mSvy'1) is within the recommended pennissible limits of 1.00 mSvy*1 for general public exposure and the effective doses to different body organs are all below the recommended limits of 1.0 mSvy'1. The background exposure level in Abzat quaring site is relatively safe with a potential of posing health risk on residence of the area in years to come due to doses accumulated.
  • Thumbnail Image
    ItemOpen Access
    Assessment of Underground Water Potential in Ninga, Akwanga West Development Area, North Central, Nigeria
    (Department of Physics, Nasarawa State University Keffi, 2022-12-12) Ayanninuola, O.S.; Abdullahi, N.K.; Loko, A.Z.; Isah, S.H.; Ogwola, P.
    Ninga area of Akwanga Development Area, North central Nigeria was investigated for the evaluation of groundwater potential. The area is underlain by the Basement Complex of the North-Central Nigeria. Twelve Vertical Electrical Sounding points were identified in the study area using Omega Resistivity Terameter, GPS12Garmix with cable spread of AB/2=160m. Schlumberger electrode configuration was employed. The Vertical Electrical Sounding (VES) data acquired were interpreted into a model curve using IX1D. From this interpretation three (3) different curve types were obtained from the acquired data. They are QH, QA and H. QH type is the dominant type of the curve obtained. It was observed that the aquifer depth range between 8m-46m, basement resistivity 700 Ωm -3700Ωm, depth to basement 16- 56m, aquifer thickness 4m – 31m and aquifer resistivity 150 Ωm -600Ωm. The groundwater potential varies in the study area, VES 1, 4, 5, 6, 7, 9,10, 11, and 12 are viable locations for groundwater exploration, with true aquifer resistivity values range from 150-600Ωm. Keywords: Aquifer, Basement Complex, Electrical Resistivity, Vertical Electrical Sounding,
  • Thumbnail Image
    ItemOpen Access
    Background Gamma Radiation Measurement Of Market Places In Keffi, Nasarawa State, Nigeria.
    (Department Of Library And Information Science, Faculty Of Education, Nasarawa State University, Keffi., 2021-06-05) Sarki, M.U.; Ma'aji, U.M.; Iliya, M.M.; Isah, S.H.; Wada, H.M.; Ahmed, I.
    In this study, the assessement of background gamma radiation measurement of market places in Keffi Nasarawa State, Nigeria has been conducted. An in-situ measurement of background gamma exposure rate count per minute for twenty locations from two market (ten measurement each) was done using a well calibrated portable halogen-quenched Geiger Muller (GM) detector (Inspector alert nuclear radiation monitor SN: 3544) at an elevation of 1.0 m above ground level with a Global Positioning System (GPS) for geographical locations. Using an established radiological relations, the radiological health hazards were evaluated using the measured background gamma exposure rates. The values obtained were compared with recommended limits set by ICRP and UNSCEAR to ascertain the radiological hazard status of the environment. The mean values of the background gamma exposure levels (0.0869 mRh'1), absorbed dose rates (756.03 nGyh'1) and excess lifetime cancer risk (3.245x 1 O'3) are higher than their recommended safe limits of 0.013 mRh'1, 84.0 nGyh'1, 0.29x10’3 respectively as recommended by UNSCEAR and ICRP. The mean Annual Effective Dose Equivalent (AEDE) (0.927 raSvy'1) is lower than the recommended permissible limits of 1.00 mSvy'1 for general public exposure and also the effective doses to different body f organs are all below the recommended limits of 1.0 mSvy'1. Generally, the study shows that market places • in Keffi, Nasarawa State is relatively safe radiologically with little contamination which could be attributed C to the to human activity and partly due to geological formation of the market places. However, the contamination will not pose any immediate radiological health effect on resident of the area but there is tendency for long-term health hazards in the future such as cancer due to doses accumulated.
  • Thumbnail Image
    ItemOpen Access
    Gravitomagnetic Coupling in a Weak Field Approximation
    (Department of Physics, Nasarawa State University Keffi, 2019-06-12) Sarki, M.U.; Ewa, I.I.; Mustapha, I.M.; Yusuf, M.A.; Isah, S.H.
    According to general relativity, a moving or rotating matter should produce contribution to the gravitational field which is in analogy to the magnetic field of a moving charge or magnetic dipole; we can thus express the general relativity in a Maxwellian structure with the existence of single operator for both fields. In this research work, we studied the coupling of Maxwell's dynamical theory of electromagnetism in a non-static gravitational field by applying an obtained gravitational scalar potential to the Riemann's laplacian operator. In the limit of weak gravitation, we obtained the dynamical gravitomagnetic scalar potential across the fields. While in the boundary conditions the results are generalized gravitomagnetic potential. our results will thus widen the scope into study of gravitomagnetic coupling.
  • Thumbnail Image
    ItemOpen Access
    Indoor and Outdoor Background Radiation Levels and Radiological Hazard Assessment of Some Modern Houses in Keffi Metropolis, Nasarawa State, Nigeria
    (Department Of Library And Information Science, Faculty Of Education, Nasarawa State University, Keffi., 2021-06-02) Idris, M.M.; Isah, S.H.; Wada, H.M.
    In this study, the radiological hazard indices due to radiation exposure of some modern houses in Keffi, Nasarawa State were investigated. An in -situ measurements of the exposure level were made using Radex radiation meter model RD 1212. The radiological hazards indices evaluated were absorbed dose rate (ADR), outdoor annual effective dose rate and the excess cancer lifetime risk. The mean exposure obtained for the modern houses and its surroundings ranged betxveen 0.05 to 0.09 pSv/h and the corresponding calculated ADR ranged between 0.088 to 0.158mSv/yr, while the calculated outdoor AEDR is 6.13 x 10-5 to 1.10 x KNmSv/yr. The estimated excess lifetime cancer risk due to gamma radiation at the modem houses and its environment is ranged between 2.15 x 10-4 to 3.86 x 10-4. The results show that the modern houses and their sunoundings within Keffi metropolis of Nasarawa State cannot pose any risk as the annual effective dose rate is below the acceptable dose limit of lmSv/yr for the public and the excess lifetime cancer risk from the houses was below the 0.3mSv/yr. Tins indicates that the building materials that were used may not pose any significant radiation hazard to the people.
  • Thumbnail Image
    ItemOpen Access
    Mathematical Model of Political Rumour in Assakio Community with Conditional Latent Period in a Varying Population
    (Department of Computer Science, Nasarawa State University Keffi, 2021-09-09) Emmanuel, Atanyi Yusuf; Akayede, Imam; Olagunju, A.S.; Aimufua, Gilbert Imuetinyan Osaze; Apene, Oghenvovwero Zion; Sani, Umar; Isah, S.H.
    1/1 «-its paper 1 rumour propagation model with conditional latent period and uarying population is considered. 111 tire literature, 12551081 model assume that an ignorant in d d u a l enters tire latent period and decide ■whether to become aspreader or stifler.ln our model roe introduce anew compartment called tire blackmailers, another type o f spreaders who spread the rumour for selfish reason. The model equations are first transformed into proportions, thus reducing the model equations from fine to four differeritial equations. The model exhibit two equilibra, namely the Rumour Tree Equilibrium RTEf and the Rumour Endemic Equilibrium REE). Using the method of linearized stability, we establish that the RTE state exist and is localhj asymptomatically stable when R٠