Tag Archives: SEM

Quality Assurance Practices and Students’ Performance Evaluation in Universities of South South Nigeria: A Structural Equation Modelling Approach (Published)

This study assessed quality assurance practices and students’ performance evaluation in universities of South-South Nigeria using an SEM approach. Three null hypotheses guided the study. Based on factorial research design, and using a stratified random sampling technique, a sample of 878 academic staff were drawn from a sampling frame of 15 universities in South-South Nigeria. Quality Assurance Practices Students’ Performance Evaluation Scale (QAPSPES) with split-half reliability estimates ranging from .86–.92, was used as the instruments for data collection. Multiple regression and Confirmatory Factor Analyses (CFA) were used for the analysis of data, model building, and testing of the hypotheses at .05 alpha level. Findings showed a significant composite and relative influence (F=48.19, P<.05) of school management, staff, and students’ quality assurance practices on students’ performance evaluation. The results also indicated that there were positive and significant covariances between the four variables of this study, with the CFI, RMSEA, TLI, and SRMR values indicating a good model fit. It was recommended, based on the findings of this study that, each school should organize quality assurance orientation campaigns for new students and set up quality assurance committees at the school, faculty and departmental levels for optimal performance in schools.

Keywords: CFA, Evaluation, Performance Evaluation, Quality Assurance, SEM, South-south Nigeria., Students performance

Predicting Consumer Adoption of Point Of Sale (POS) E-Payment System in Nigeria Using Extended Technology Acceptance Model (Published)

This study is concerned with Predicting Consumer Adoption of Point of Sale (POS) e-Payment System in Nigeria Using Extended Technology Acceptance Model. We extended the TAM by adding two variables: consumer awareness and security of operations to ascertain how they predict the original TAM constructs: PU and PEOU to predict POS adoption. The study was based on a sample of 400 respondents in Awka, Nigeria; of which 234 responded. Questionnaire was the instrument for data collection and was designed with five point likert scale. Four items were used to measure each of the variables. The analysis was done with SEM with the aid of AMOS 23 software. This study has established that PEOU and PU positively and significantly impact POS adoption in Nigeria. It also demonstrated that security impacts PEOU positively and significantly but insignificantly on PU. Consumer awareness (CA) significantly and positively impact PU but impact on PEOU is not significant. The study has implications for research and practice. Further researches should be conducted with further extensions to show the mediation and or moderation impacts of the two variables

Keywords: E-Payment., Perceived Ease of Use, Perceived Usefulness, SEM, Security, awareness

The Efficiency of Mixed Surfactants as air entraining agents in Cement Pastes (Published)

The interaction that occurs when combining surfactants is more than the sum of the properties of each surfactants. These interactions can either enhance or detract from the action of these surfactants as air entraining agents. In an attempt to understand these interactions of some surfactants used as air entraining agents, the effect of several air-entraining agents was compared, in addition to two mixtures of them. The results show that CABP surfactants can be used lonely and in conjunction with other surfactant groups, taking into consideration that the compatibility of betaines with anionic surfactants is better than that with cationic surfactants. Higher compressive strength and less pore size appeared when using LM solo and in mixes which demonstrates the positive impact of using LM in these mixes

Keywords: CABP, Compressive Strength, HYPR, LM, SDBS, SEM, air-entraining agent, density, mixed surfactant

On The Taxonomy of Cactaceae Juss by the Evidence of Seed Micromorphology and Sds-Page Analysis (Published)

Numerical classification of 16 taxa of Cactaceae was studied using combination of micromorphological characters of seeds (using L.M and SEM) and SDS-PAGE analysis. Aspects of seed micromorphology and seed protein variation as defined were recorded and scored comparatively for the OTU’s into a data matrix. Phenetic relationships of these taxa were established based on UPGMA-clustering method by using Jaccard coefficient of the NTSYS-pc 2.2 program. The results were compatible with the traditional relationships of some taxa as the split-off of Opuntia humifusa and Astrophytum myriostigma, at separate lines, these results are compatible with their placement in tribes Opuntieae (subfamily Opuntioideae) and Cacteae (Subfamily cactoideae) respectively, at the time, the placement of three taxa Pseudorhipsalis ramulosa, Rhipsalis baccifera Accession 1, and Rhipsalis baccifera Accession 2 together, the clustering of Hylocereus triangularis and Neobuxbaumia euphorbioides together at a unique tribe Phyllocacteae. The findings contradict in a number of cases the traditional studies, as the grouping of Trichocereus vasquezii with the two represents of genus Parodia despite of their placement in different tribes.

Keywords: Cactaceae, SDS-PAGE, SEM, Seed micromorpgology