Asian Transactions on Science & Technology
Volume: 04, Issue: 02, May 2014
Title: Geotechnical Implications of Using Shale as Subgrade Materials
Author(s): N. E. Ekeocha
Paper ID: ATST-80311050
Pages: 1 - 5
Abstract: Shales by definition are fine-grained rocks that contain between 50% and 100% clay sized particles with clay mineral constituting at least 25% of the total rock volume. Shales when highly indurated may be used as construction materials because of their intermediate hardness. They also possess a degree of intactness, continuity and strength. This assertion greatly is flawed by the nature of deterioration such shales are prone to when exposed to the variation in moisture content. This behaviour is responsible for the failure recorded by the roads within the study area. This is attributed to the manner of cation exchange that the clay minerals undergo, which gives rise to increased water adsorption and subsequent reduced strength properties of the clays. CBR test was conducted on samples from nine (9) locations between Umuahia and Awgu, where road failures are much worse than other sections of the Enugu - Port Harcourt expressway at the time of the study, and it is thought that these failures may have been caused by the underlying shale subgrades. The overall averaged CBR results ranged between 5.5% and 10.9% after being soaked for 24 hours at optimum moisture content (OMC), which ranged between 11.2 and 14.4% at the various locations that were studied. On the other hand, the overall unsoaked CBR values ranged between 9.4 and 15.2%. Though the results of the CBR conformed to the specifications of the Federal Government standard pavement design specification, the liquid limit and plasticity index values of the samples far exceed those specified by the Federal Government, thereby justifying the failure trend observed within the area.
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Title: Effect of the facebook usage on the healthy lifestyle of students
Author(s): Layla Abas
Paper ID: ATST-50301068
Pages: 6 - 15
Abstract: The objective of this study was to investigate how students lifestyle affected by the usage of facebook. Non-probability sampling a convenience sample of (205) students of technical institute was selected for the purpose of the study. It was comprised of two parts; (1) includes the students' demographic attributes and (2) assessment the effects of facebook usage on the lifestyle of students with (20) true or false questions. Data were analyzed through the application of descriptive statistical data analysis approach (frequency and percentage), and inferential data analysis approach (chi-square).
Methodology: A descriptive study was used for the assessment approach and applied on institute students from 1/2/2013-11/7/2013. Non-probability sampling a convenience sample of (205) students was selected for the purpose of the study. It was comprised of two parts; the first part includes the students' demographic attributes and the second part assessed the knowledge of institute students with (20) true or false questions. A pilot study was carried out for the period of February 15th to 25th, 2013 to determine the questionnaire reliability through the use of (Test - Retest). A panel of (8) experts was involved in the determination of the questionnaire content validity. Data were analyzed through the application of descriptive statistical data analysis approach (frequency and percentage), and inferential data analysis approach (chi-square).
Results: Study findings revealed that more than half (52.2%) of students were female, more than two-third (81.0%) of students belong to (19-21) years of age group.(47.3%) were illiterate mothers, also (42.4%) fathers had completed elementary school. More than two-third (92.2%) of parents were moderate status. (77.6%) of the student mother were occupied by government. While only 13.2 %) fathers have government status. According to the levels of effect of facebook usage (100%) of students answered correctly all questions about facebook usage effect, and there was a highly significant relationship between levels of effect of facebook usage with mother's occupational level.
Recommendations: The study findings highlight the need for excessive health education about effect of facebook usage and advice the students to comply with recommended healthy lifestyle of students.
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