Agglomerative Hierarchy Clustering for Evaluation of Workplace Safety Culture Implementation and Practice | Chapter 05 | Emerging Issues in Science and Technology Vol. 2

This study assessed safety culture and practices in selected companies from the oil and gas, construction, transportation and logistics companies operating in the Niger Delta region of Nigeria. The questionnaire design utilized 15 safety cultural parameters and practices peculiar to 11 companies formed the basis of questionnaire distributed to 663 respondents in the study area. Purposive sampling was employed in the choice of companies sampled while random sampling technique was applied with respect to questionnaires distribution within the selected companies. XLSTAT 2016 statistical computer package was applied as aid for data analysis which includes Shapiro-wilks test of normality as an aid for the choice of analysis of variance option, the Friedman’s test to determine the variance among the various sampled groups which also includes a post-hoc test (Nemenyi’s Procedure) and Agglomerative Hierarchy Clustering (AHC) for clustering of workplace safety culture practices within the sampled groups. The output from the analysis of variance showed that there is a significant difference between the safety cultural practices of the three sampled industrial sectors with the alpha = 0.5 being lower than computed p-value (< 0.0001). Further analysis by AHC resulted in 4, 3 and 3 clusters of workplace safety cultural practices for oil and gas, construction and transportation and logistics sectors, respectively. The cultural practice were supervisors are authorized to stop unsafe work was identified as common between the construction and oil and gas sector while the practice of periodic hazards hunts and inspections by staff and management was identified as common among the construction and transportation and logistics industrial sector.

Author(s) Details

George I. Akalonu
Centre for Occupational Health, Safety and Environment, University of Port Harcourt, Nigeria.

Ify L. Nwaogazie
Centre for Occupational Health, Safety and Environment, University of Port Harcourt, Nigeria.

Ejikeme Ugwoha
Centre for Occupational Health, Safety and Environment, University of Port Harcourt, Nigeria.

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Subsoil Conditions of Parts of Niger Delta Wetland, Nigeria | Chapter 05 | Current Perspectives to Environment and Climate Change Vol. 2

The subsoil conditions of Gbaran North Bank area, parts of the Nigerian wetland were evaluated using both disturbed and undisturbed soils, which were subjected to various laboratory tests adopting the British Standards methods, with the aim of establishing the subsoil conditions of the area as it affects use of the soils for various kinds of construction. The liquid limit recorded values between 37% and 50%, plastic limit range of 11% – 23% and attendant plasticity indices of 20% – 33%. The soils classified as highly plastic on the basis of their plasticity index and showed expansivity range of low – medium, while the swelling type was critical – non-critical. The soils recorded shear strength values of 39 – 42 KN/m2 with coefficient of consolidation Cv values of 0.4 – 30.5 m2/yr. The soils from the results showed tendencies towards expansion and therefore pose a problem to construction except precautionary measures are taken to ensure safety and durability of structures. Improved waste and flood management on the other hand, will facilitate sustained shear strength properties of the soils thereby enhancing their constructional values.

Author(s) Details

P. K. Wokoma
Department of Geology, Faculty of Science, University of Port Harcourt, Port Harcourt, Rivers State, Nigeria.

N. E. Ekeocha
Department of Geology, Faculty of Science, University of Port Harcourt, Port Harcourt, Rivers State, Nigeria.

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View Volume: https://doi.org/10.9734/bpi/cpecc/v2