The assessment of terrestrial background ionizing radiation levels within fossil fuel and gas dispensing environments to evaluate the radiological risk around Warri metropolis has been conducted using a digilert 200 Nuclear Radiation monitor meter and a GPS. The GIS monitoring of the BIR levels was carried out between September and December 2018 by delineating the city into eight zones using GIS mapping. The measured average exposure rates ranged from 0.006mRh-1 (0.50????-1 ) to 0.026mRh-1 (2.19????-1 ) with an overall mean value of 0.015±0.004mRh1 (1.26±0.32????-1 ). The estimated mean outdoor absorbed dose rate for the regions ranged from 116.60±40.38nGyh-1 in Jeddo region to 148.9±49.63nGyh-1 in PTI region and a mean of 129.82±32.98?Gyh-1 . The AEDE evaluated is 0.16±0.04????-1 while the ELCR value is 0.56±0.014µ???-1 . The estimated dose to organs testes receiving the highest organ dose of 0.10 ????-1 while the liver receives the lowest dose to organ of 0.06 ????-1 . The GIS mapping of the examined facilities revealed that radiation levels in 38 of the 61 sampling locations (62.3%) exceeded the global ambient permissible level of 13.0 ?Rh-1 (1.0 ????-1 ) reported by UNSCEAR, therefore the measured values are adjudged high and the environment radiologically impaired. But, these may not cause any short- team health risk to the fuel/gas attendants and attendees in these stations. The obtained estimated excess lifetime cancer risk indicate slow chances of contracting cancer and the radiation doses to the adult organs investigated is insignificant.

This short report acquaints the reader with the developed software that can work with pure piezoelectrics, pure piezomagnetics, pure piezoelectromagnetics (PEMs), and the PEMs with incorporation of gravitational phenomena, i.e. piezo gravito torsiono electromagnetic (PGTEM) materials. This software can calculate the material properties and wave characteristics in all the aforementioned continuous media. Also, it allows the PEM and PGTEM composite creation from the material parameters of both piezoelectrics and piezomagnetics that present in the software database or can be loaded from a file. The interface of the developed interactive software and sample calculations are demonstrated. PACS: 51.40.+p, 62.65.+k, 68.35.Gy, 68.35.Iv, 68.60.Bs, 74.25.Ld, 74.25.Ha, 75.20.En, 75.80.+q, 81.70.Cv, 96.20.Jz, 04.30.-w, 04.90.+e, 95.30.Sf

Corrosion and scaling are two common and major problems encountered in water treatment systems. In this study, we have investigated the dual behavior of a maleic acid based copolymer on scale and corrosion inhibition for solving both the problems together. Two different types of maleic acid – ortho toluidine (MA-OT) copolymer were synthesized by varying the proportion of monomers and characterized by FTIR spectroscopy. The anti-scaling properties of the polymer towards CaCO3 scale were studied through chemical and electrochemical screening tests at different pH, temperature and inhibitor concentration. The corrosion inhibition performance of the copolymer was tested through weight loss method and through optical and scanning electron microscopes. The effect of copolymer on the calcite scale crystal morphology and structures were examined through SEM. Statistical methods such as analysis of variance (ANOVA) and response surface methodology were used to analyze the data and model the performance of the dual inhibitor.

A new approach to the design of spacecraft for flights in space is proposed. The device for converting an electromagnetic pulse into a mechanical pulse is analyzed in detail. An experiment is described that demonstrates the existence of traction in the proposed device. It is shown that the specific thrust of this device is 1000 times greater than the specific thrust of a jet engine. The author offers cooperation for patenting in various countries and the development of devices for various purposes.

Globally, population growth and changes in land-use practices affected the dryland ecosystems. Land use can stimulate changes in communities under climate change. The aim of this study was to detected the impact of climate change on land use in UAE (Abu Dhabi, Al-Ain and Sharjah) by assessing the change in air temperatures through the different land use classes. The research question was; what is the relationship between the increase in the air temperatures and the change in the land use/ land cover classifications through the past 20 years. Eight classes were recognized in the study area; Costal Sabkhas, Inland Sabkhas, Mixed Class (Urban and Vegetation), Urban, Rock Outcrops, Rocky Surfaces, Type 1 soil (Sand Dunes) and Type 2 Soil (Bare Land). In the year 2001, Coastal Sabkhas, Mixed Class and Urban experienced increase in temperature by (0.67, 1.14 and 1.16), respectively. In 2008 there was a drop in the temperatures from 35.43°C to 33.65°C in Mixed Class (1.78°C) and from 35.62°C to 33.54°C in Urban Class (2.08°C). Future detailed study in the area to monitor the change in land use due to climate change and vice versa is a good opportunity for the researchers who are interesting in the region.

The parameter variation on MHD oscillatory fluid flow in a porous parallel channel with heat was investigated. The governing equations were formulated, and the coupled partial differential equations were converted to ordinary differential equations by adopting perturbation parameters involving the oscillatory frequency terms such as i t o u u e ? ? and i t o e ? ? ? ? in the channel of flow for velocity and temperature profiles respectively. Numerical simulation was carried out using Mathematica 12 to study the velocity and temperature profiles with some pertinent parameters such asGr Pr M K Rd R , , , , , . In addition, it is seen that some of the aforementioned parameters influenced the flow profiles in increasing and decreasing fashion which is very important in annexing the usefulness of the parameters to study flow in a porous parallel channels.

This work is aimed at finding the optimal investment strategy for an investor under the modified constant elasticity of variance (M-CEV) and Ornstein-Uhlenbeck models. We assume that the stock price is governed by modified constant elasticity of variance (M-CEV) model, where the investor has an exponential utility preference. We also investigate the impact of the correlation of the Brownian motions. Dynamic programming principle, precisely, the maximum principle is applied to obtained the Hamilton-Jacobi-Bellman (HJB) equation, on which elimination of variable dependency was applied to obtain the closed from solution of the optimal investment strategies. It was verified that the investor’s optimal investment strategy when the Brownian motions correlate is greater than the investor’s optimal investment strategy when the Brownian motions do not correlate by a fraction

Childhood mortality in general and infant mortality in particular has long been a public health menace in Nigeria. Identified as one of the barometers for the measurement of any population’s state of health, health facilities and well being, relevant authorities in government and stakeholders in public health have all moved to reduce and possibly eliminate its occurrence with little success. This is evident in the fact that Nigeria was one of the countries that failed to meet the Millennium Development Goal (MDG) for the reduction of childhood mortality by two-thirds in 2015. Having failed to achieve MDG 4, genuine concerns of her ability to achieve the Sustainable Development Goal (SDG) 3.2 by 2030 has led to an inquest into the country’s chances of reducing childhood mortality rate occurring within the first year of life. The present study utilized the Auto-Regressive Integrated Moving Average (ARIMA) model for to make forecast of infant mortality in Nigeria up to the year 2030 using data obtained from the United Nation’s Inter Agency Group for Childhood Mortality Estimation (UN-IGME). The ARIMA (1, 1, 1) model selected predicted a reduction of up to 30% by 2030 at 95% confidence interval.