Archives-January 2019

The voltammetry methods have revealed in the water of the Cotonou channel, the presence of organic and inorganic complexes of metals, such as: Zn-Carbonate, Zn2+, ZnSO4, Zn-OM, Cu-Carbonate, Cu2+, Cu(OH)2, Cu-OM, Pb-Carbonate, Pb2 +, Pb-OM, Cd-Carbonate, Cd2+, and Cd-OM. Their concentrations were variable with the water pH and depended on the season. At pH values ranging 6.5 - 7.2, metals were complexed by carbonate ions present in the water. Zinc is predominantly present as Zn2+ in the rainy season and Cu2+ levels were decreasing when pH was increasing. 80% of the total lead appeared to be complexed as Organic matter complex lead (Pb-OM), and cadmium (Cd-OM) which, unlike other metals, was mainly present in free Cd2+ form.

The article is dedicated to investigation of two basic problems: (i) would bring the U.S. sanctions imposed on Iran to minimizing and even to cancelling the oil exports from this country? (ii) what impact would have those sanctions on the country’s economic growth? For the survey we have used two methods. Primo, we have explored oil export structure from Iran and have studied oil import organization of the major commercial counterpart states trying to clarify if they would be able to substitute oil imports from Iran by alternative sources. And, secundo, we have drawn a statistical model, which links Iranian GDP with oil exports. Such a model was necessary for investigating probable undulations in the Iran GDP due to changing volume of exporting oil. Investigation results are important and may have huge geopolitical corollaries as follows: (i) In medium-term run President Trump’s administration measures to cause serious economic obstacles for economic development of Iran will be unsuccessful. (ii) USA has no means and geopolitical instruments to bring oil exports from Iran to zero. (iii) Hence, even if it is done, these measures will cause difficult but not dramatic consequences for economic life of this Islamic country, which would create complications for development of civil society in Iran. Moreover, the desire of President Rouhani to modernize the Iranian society will fail, and Islamic Revolutionary Guard Corps, weakened under the Rouhani’s presidency, will regain momentum. (iv) Thus, President Trump’s measures will cause just the back effect than the target he wanted to reach, and (v) The sole possibility to provoke democratic movements within the Iranian society is to imply the country into international energy projects, in which Rule of Law is governing partnership relations.

The research on Study Habits and Students Academic Performance in English Language among Public Secondary Schools in Oron Local Government Area of Akwa Ibom State was conducted in order to seek solution to the increasing nature of poor academic performance of students in English Language among Public Secondary Schools in Oron Local Government Area. Four variables were adopted to include participation in tutorial classes, attendance to classes, use of library and personal time table, which aimed at finding the relationship between each of those variables with academic performance of students. Four research questions and four research hypotheses were set. The related theories of learning used are connectionism, cognitive and psychological theories of learning. The population of study comprises all the 3 Public Secondary Schools in Oron Local Government Area. The instrument used for the study was Study Habit and Academic Performance Questionnaire (SHAPQ) which has a reliability coefficient of 0.99 using Pearson Product Moment Correlation (PPMC) at P<.05 level of significance. The sample size was 200 students and data collected from the respondents were analyzed using PPMC with the degree of freedom of 198 at 0.05 level of significance. The result of data collections were drawn that: students should participate in tutorial classes, attend classes, use the library and should have a personal time table to improve academically. In conclusion, students should develop good study habits to achieve better academically and otherwise.

This study was designed to investigate interventions that were being introduced by secondary school heads in effective implementation of Information and Communication Technology (ICT) in Mutasa District of Manicaland in Zimbabwe. The study population comprised forty-two secondary schools with a combined enrolment of around ten thousand two hundred students and thirty secondary school heads. Purposive sampling was used to select ten secondary schools and thirty-seven teachers for detailed study. An entirely qualitative research design was used since the researchers were dealing with unstructured and non-numeric data. The researchers used questionnaires, interviews, observation and document analysis to elicit data that wereneeded to provide responses to research questions. The major findings were that although school heads had generally embraced ICT at their schools, they did not have proper ICT qualifications and were not fully equipped to deal with all issues that would lead to meaningful interventions. School heads did not have adequate knowledge on ICT and very little was being done to address the situation through in-service programmes. It was also noted that school heads faced a multiplicity of problems which heavily militated against the smooth introduction of ICT in schools. Most of the problems emanated from the fact that these schools did not have solid revenue bases. It was also observed that the attitude of the head was a pivotal factor that determined the manner and extent of ICT usage at a school. The mind-set of the head was seen as being very instrumental in encouraging teachers to embrace or ignore ICT. This research also revealed that there were other external forces that compelled school heads to introduce ICT at their schools. This study strongly recommends that responsible authorities for schools and the Ministry of Primary and Secondary Education in Zimbabwe should come up with serious measures that assist school heads to procure ICT appliances and learn about them.

The National Radioactive Waste Management Centre (NRWMC) of the Ghana Atomic Energy Commission undertakes routine monthly radiation monitoring in and around the vicinity of its storage facility. In collaboration with the government of the United States of America, the Ghana Atomic energy Commission (GAEC) upgraded and intensified the safety and security systems at the radioactive waste storage facility located at the main site of the GAEC. Additional storage/decay rooms were built with more enriched and thicker concrete blocks to be able to contain the radiation. The sources were transferred from the old block to the new re-enforced block. Radiation levels were measured for a period of six months before and after the transfer of the sources and the results compared. An average dose rates of 0.13 nSv/y and 0.02 nSv/y were recorded around walls of the storage facility before and after the transfer of the sources, respectively. The reduction in the dose rate was attributed to the increased thickness of the walls of the new storage block providing enough shielding to the radiation. Comparing the results with the IAEA safety standard on dose limit of 1.0 mSv/y to the public and 20 mSv/y for the radiation worker, it was concluded that the radiation levels emanating from the facility are low and within the allowable limits.

Common field practice for electrical surveying relies on directly placing an electrical current into the ground (direct current electrical resistivity surveying) and measuring the response (the electrical potential drop) to that current over a set distance. Resistivity analysis was conducted at a site earmarked for a radioactive waste disposal facility known as the Borehole Disposal Concept (BDC) at the Ghana Atomic Energy Commission’s site located at Kwabenya, in the Greater Accra Region of Ghana. Both resistivity profiling also known as electric trenching and vertical electrical sounding also known as electric drilling were employed in this study. The results from both techniques were processed and discussed. Medium to very low apparent resistivity were measured at certain stations/points on the survey lines which suggest the presence of geological structures/contacts such as faults and fractures at or around these stations. With the aid of the electrical sounding data the site was characterized as a four layer formation with the bedrock lying at depth of 17 m and beyond.

The purpose of this subject to know the quality of clinker which produce from the rotary kiln according to amount oxygen rate in the exhausted cases measured by or sat device in smoke chamber .the expert in quality control can be recognize the good clinker and bad clinker according to the condition of kilne to maintain the flame temperature in suitalele range that inverts relation with excess oxygen to protect the material temperature in in the burning zone . if the temperature of materials increased or decreased or decreased will be cause upset the kiln and the material feed become deeay so that the economy cost is rising .

The study evaluated the effect of anthropogenic activities on the physico-chemical properties of soils of Awka South, LGA, Anambra state, Southeastern Nigeria. Triplicate soil samples were collected from different soil depths (0-15, 15-30 and 30-45 cm) in four land use types: sand mining, play ground, arable land and forest land of Agu Awka, Amawbia, Okpuno and Ifite respectively. Physico-chemical properties of the soils were analyzed using standard methods. Analysis of variance and correlation analysis were performed using Genstat Statistical Package Version 18. Results showed that soil properties were significantly (P<0.05) influenced by the different anthropogenic activities and were not uniformly distributed down the depths. Soils were dominated by loamy sand and were moderately compacted with low moisture content. The soils were generally acidic (4.47-.5.83) irrespective of depth and landuse.Organic carbon (0.263-0667 %) and total nitrogen (0.028-0.069 %) were low and were seriously reduced by human activities. Available phosphorus (6.12-8.91 ppm) was seriously increased in sand mining compared to other land use types, moreover, sand mining activities had impacts on the levels of Ca (5.32-1.99 cmolkg-1) and Na (0.020-0.32 cmolkg-1). Total exchangeable acidity was reduced in all the land use types apart from playground where there was slight increase (1.57-1.70 cmolkg-1). Total exchangeable bases and ECEC followed decreasing pattern of forest > arable land > sand mining > playground. Soil pH had significantly positive association with OC, TN, Ca, Mg, TEB, EEC, %BS, TP and MC. To improve the fertility status of these soils especially arable land, the use of organic and/or inorganic fertilizer is required. The regulation of mining activities in the study area was also recommended to protect the soil from further degradation.

Using the initial value problem approach, the evolution of linearized perturbations in a stratified shear flow with rotation is studied. Here the resulting equation in time posed by using Fourier transformation and Square transformation is solved for the Fourier amplitudes for bounded couette flow with a point source of the field of transverse velocity and density as the initial distributions. Perturbation solutions are obtained and the velocity and density plots are drawn to find the effect of density variation and rotation

Table of contents for the month of January 2019