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The performance and distribution of species along soil salinity gradients of mangrove swamps in southeastern Nigeria
Get PDFBased on periodic soil salinity measurements direct gradient analysis procedures were used to relate the performance and distribution of mangrove swamp species to salinity gradients. Variations in soil salinity were due to distance from the coast, tidal incursions and freshwater inputs. All overstorey species showed statistically significant negative correlations with salinity while most ground layer species were positively correlated with the same factor. Based on ecological group classification, no species was found to occur on the highest values of soil salinity. There were overlapping range of occurrences and ecological optima for most species along the gradients
Modelling of the Thermal Conductivity Property of a newly developed Thermo-Regulated Brick
Get PDFThe work modelling of the thermal conductivity property of a newly developed thermo regulated brick has been extensively carried out. The brick was developed from anthill clay and cement and the various properties of the bricks were investigated, however, for this particular work the property of interest was the thermal conductivity. The thermal
conductivity data was used for developing a prediction model using linear adaptive filter. This model was used with variables from the previous work and the model produced results similar to the desired output. A plot of the prediction values and the actual thermal conductivity values on the same graph showed the two curves lying in the same position
(tight-fit) clearly indicating the accuracy of the prediction model. This was also confirmed by the performance evaluation of the developed model. The mean square error was 1.2441E-023 which indicated negligible variation from the actual thermal conductivity values
Attitude of Students Towards E-learning in South-West Nigerian Universities: An Application of Technology Acceptance Model
Get PDFThe study examined the attitude of students towards e-learning in selected south-west
Nigerian universities. Specifically the study looked at the relationship between attitude and elearning with the application of Technology Acceptance Model (TAM). Questionnaire was
used to collect data from a sample of 387 postgraduate and undergraduate students. Statistical
techniques used for the analyses of data were frequency distribution, simple linear regression,
One-Way ANOVA and paired T-test was used to test the hypotheses. Findings showed that
students have a positive attitude towards e-learning because they find the system
easy to use and useful for their course work. Also, attitude influences the intention to use an
e-learning system
Concept mapping teaching strategy, achievement and retention of SS II English language students in Rivers state
Get PDFThis study was on Concept Mapping Teaching Strategy, Achievement and Retention of SS II Students in English Language in River State. The poor academic performance of students in this subject area has been attributed in part to obsolete teaching strategies by researchers and educational critics. Two objectives were set for the study. The population for the study was all the students in senior secondary II in Obio/Akpor and Ikwerre Local Government Areas of Rivers State. An experimental research design, specifically the non-randomized control group pretest-posttest design with an intact class was used for the study. The sample consisted of a total of 202 students, made up of 124 males and 78 females. Two types of instruments: English Achievement Test (EAT) and English Retention Test (ERT) were used. The test items in the instrument were validated by the researchers’ colleague in the Department of Educational Technology/Library Science. A reliability coefficient of 0.87 for both instruments by Kuder Richardson formular 21. The subjects were pre-tested before exposure to the two different teaching strategies, and posttest administered to the groups. The data collected from the pretest and posttest were statistically analyzed using t-test. The results obtained showed that significant difference exist in the achievement and retention of subjects in English language taught with concept mapping strategy and those taught with lecture method. The application of Multiple Classification Analysis (MCA) showed that students in English language taught with concept mapping strategy achieved and retained significantly better than those taught with lecture method. Based on the finding, the paper submitted that concept mapping teaching strategy is the more effective in the enhancement of students’ academic achievement and retention in English language. The study recommended that, the teaching strategies of English language teachers should be very flexible to incorporate new strategies. Concept mapping teaching strategy should be adopted and integrated into the secondary school curriculu
Development of prediction models using linear adaptive filters for some properties of a newly developed thermo regulated brick
Get PDFThe development of prediction models using linear adaptive filters for some properties of a newly developed thermo-regulated brick has been carried out. The research started with the development of the bricks using anthill clay a material known for its thermoregulation property. The bricks were subjected to various tests to ensure that they conform to specifications and standard for thermo-regulated bricks and also to ensure that the thermal conductivity does not differ so much from that of bricks from virgin anthill clay. The tests
data upon which the developed prediction models in this work were based were those of water absorption test, compression test and by extension abrasive index. Two models were developed for the prediction of water absorption and abrasive index properties of the developed thermo-regulated bricks. Plots of the predicted values of water absorption and the actual values of water absorption on the same graph showed a tight fitting curve indicating a high degree of accuracy for the prediction model. The plots of the predicted values of abrasive index and the actual values of abrasive index on the same graph showed a tight fit at some points and variations at other points. The performance evaluation of the prediction models showed that the model for the prediction of water absorption had a mean square error of 8.3521E- 4 and the model for the prediction of abrasive index had a mean square error of
0.0225. The performance evaluation has indicated that the two models have not done badly, though the accuracy of the water absorption model is higher than that of the abrasive index
An Overview of Accessorial Liability in Nigerian Criminal Jurisprudence
Get PDFAccessorial Liability is a crime in all known legal systems. In Nigeria, an accomplice is regarded as an accessory to whatever type of crime, be it a felony, a misdemeanour or a simple offence, committed by the principal. There is also the principal offender who does the act or makes the omission, which constitutes the actual offence. Sometimes, the principal offender commits the offence, but following from his cowardly disposition, he runs away as a fugitive to avoid arrest and punishment and another person receives and hides him. That person who provides an escape route for the principal offender is known as an accessory after the fact. It is generally this set of accessories, which provide the watershed for this paper