HIGH AND LOW WATER PREDICTION AT LAGOS HARBOUR, NIGERIA

In this work, 500 hourly water level tidal data were used to perform least squares tidal harmonic analysis. Eleven tidal constituents were used for the harmonic analysis. Astronomical arguments (v + u) and the nodal factor (f) were computed for each tidal constituent and at each observational period with a programme written in Matlab environment. The harmonic constants determined from the least squares tidal harmonic analysis were substituted into a tidal prediction model to predict hourly tidal data and tidal predictions at 5 minutes’ intervals. Series of high and low water heights from the tidal predictions made at 5 minutes’ intervals were determined and matched with their corresponding times. Autocorrelation at lags 1 to 30 for the residuals of the observed and predicted tidal data shows that there is no significant correlation in the range of the 30 lags. The series of residuals of the observed and predicted tidal data is therefore white noise.   http://dx.doi.org/10.4314/njt.v36i3.3

CD8+ T-cells count in acute myocardial infarction in HIV diseases in a predominantly male cohort

Human Immunodeficiency Virus- (HIV-) infected persons have a higher risk for acute myocardial infarction (AMI) than HIV-uninfected persons. Earlier studies suggest that HIV viral load, CD4+ T-cell count, and antiretroviral therapy are associated with cardiovascular disease (CVD) risk. Whether CD8+ T-cell count is associated with CVD risk is not clear. We investigated the association between CD8+ T-cell count and incident AMI in a cohort of 73,398 people (of which 97.3% were men) enrolled in the U.S. Veterans Aging Cohort Study-Virtual Cohort (VACS-VC). Compared to uninfected people, HIV-infected people with high baseline CD8+ T-cell counts (\u3e1065 cells/mm3) had increased AMI risk (adjusted , 95% CI: 1.46 to 2.28). There was evidence that the effect of CD8+ T-cell tertiles on AMI risk differed by CD4+ T-cell level: compared to uninfected people, HIV-infected people with CD4+ T-cell counts ≥200 cells/mm3 had increased AMI risk with high CD8+ T-cell count, while those with CD4+ T-cell counts \u3c200 cells/mm3 had increased AMI risk with low CD8+ T-cell count. CD8+ T-cell counts may add additional AMI risk stratification information beyond that provided by CD4+ T-cell counts alone

CD8+ T-cells count in acute myocardial infarction in HIV disease in a predominantly male cohort.

Human Immunodeficiency Virus- (HIV-) infected persons have a higher risk for acute myocardial infarction (AMI) than HIV-uninfected persons. Earlier studies suggest that HIV viral load, CD4+ T-cell count, and antiretroviral therapy are associated with cardiovascular disease (CVD) risk. Whether CD8+ T-cell count is associated with CVD risk is not clear. We investigated the association between CD8+ T-cell count and incident AMI in a cohort of 73,398 people (of which 97.3% were men) enrolled in the U.S. Veterans Aging Cohort Study-Virtual Cohort (VACS-VC). Compared to uninfected people, HIV-infected people with high baseline CD8+ T-cell counts (\u3e1065 cells/mm3) had increased AMI risk (adjusted HR=1.82,

CD8 + T-Cells Count in Acute Myocardial Infarction in HIV Disease in a Predominantly Male Cohort

Human Immunodeficiency Virus-(HIV-) infected persons have a higher risk for acute myocardial infarction (AMI) than HIVuninfected persons. Earlier studies suggest that HIV viral load, CD4 + T-cell count, and antiretroviral therapy are associated with cardiovascular disease (CVD) risk. Whether CD8 + T-cell count is associated with CVD risk is not clear. We investigated the association between CD8 + T-cell count and incident AMI in a cohort of 73,398 people (of which 97.3% were men) enrolled in the U.S. Veterans Aging Cohort Study-Virtual Cohort (VACS-VC). Compared to uninfected people, HIV-infected people with high baseline CD8 + T-cell counts (>1065 cells/mm 3 ) had increased AMI risk (adjusted HR = 1.82, < 0.001, 95% CI: 1.46 to 2.28). There was evidence that the effect of CD8 + T-cell tertiles on AMI risk differed by CD4 + T-cell level: compared to uninfected people, HIVinfected people with CD4 + T-cell counts ≥200 cells/mm 3 had increased AMI risk with high CD8 + T-cell count, while those with CD4 + T-cell counts <200 cells/mm 3 had increased AMI risk with low CD8 + T-cell count. CD8 + T-cell counts may add additional AMI risk stratification information beyond that provided by CD4 + T-cell counts alone

Efficacy of Quasi Agro Binding Fibre on the Hybrid Composite Used in Advance Application

The choice for natural fibre obtained from agricultural products is on the rise due to its solution to eco-friendly, environmental and improved mechanical properties concerns. Its abundant availability, low cost, emission reduction and adaptability to base material for composite make it a prime material for selection. This review explores diverse perspectives to the future trend of agro fibre in terms of the thermo-mechanical properties as it applies to advanced application in building structures. It is important to investigate the ecofriendliness of the products of composites from fibres in agricultural wastes so as to achieve a green and sustainable environment. This will come to fore by the combined efforts of both researchers and feedback from building stakeholders

Sorption and bending properties of wood cement panels produced from mixed Nigerian hardwoods at varying water/cement ratios

The study was carried out to investigate the influence of water/cement ratio on the moisture response and mechanical properties of wood cement panels fabricated with mixed hardwood species. The experimental boards so produced were subjected to modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA), thickness swelling (TS) and linear expansion (LE) tests. Data collected were subjected to statistical analysis using ANOVA and multiple linear regressions MOR and MOE ranged from 4.94 N/mm2 to 11.63 N/mm2 and 2340 N/mm2 to 4880 N/mm2 respectively. Strength (MOR) and stiffness (MOE) of the boards increased as water/cement ratio was raised from 0.50 to 0.60. Within these ranges, more dimensionally stable cement-bonded particleboards were obtained. As water/cement ratio was however raised from 0.60 to 0.65, weaker and inferior boards were produced. The results of the multiple regression analysis showed that water/cement ratio (WCR), cement/wood mixing ratio (MR) and board density (BD) were positively correlated with MOR and MOE. Water absorption (WA), thickness swelling (TS) tests ranged from 16.27 to 48.82% and 0.49 to 2.30% respectively. Statistical analysis of the results showed that the process variables WCR, BD and MR were significant at 1% level of probability on WA and TS. Moiture uptake and swelling of the panel decreased as water/cement ratio was raised from 0.50 to 0.60. Inferior panels were produced when water/cement ratio was increase beyond 0.60. Therefore 0.60 was considered uptimum level for board fabrication in this study.Key words: wood cement panels, bending properties, sorption properties, mixed hardwoods, water/cement rati

CD8+ T-Cells Count in Acute Myocardial Infarction in HIV Disease in a Predominantly Male Cohort

Human Immunodeficiency Virus- (HIV-) infected persons have a higher risk for acute myocardial infarction (AMI) than HIV-uninfected persons. Earlier studies suggest that HIV viral load, CD4+ T-cell count, and antiretroviral therapy are associated with cardiovascular disease (CVD) risk. Whether CD8+ T-cell count is associated with CVD risk is not clear. We investigated the association between CD8+ T-cell count and incident AMI in a cohort of 73,398 people (of which 97.3% were men) enrolled in the U.S. Veterans Aging Cohort Study-Virtual Cohort (VACS-VC). Compared to uninfected people, HIV-infected people with high baseline CD8+ T-cell counts (>1065 cells/mm3) had increased AMI risk (adjusted HR=1.82, P<0.001, 95% CI: 1.46 to 2.28). There was evidence that the effect of CD8+ T-cell tertiles on AMI risk differed by CD4+ T-cell level: compared to uninfected people, HIV-infected people with CD4+ T-cell counts ≥200 cells/mm3 had increased AMI risk with high CD8+ T-cell count, while those with CD4+ T-cell counts <200 cells/mm3 had increased AMI risk with low CD8+ T-cell count. CD8+ T-cell counts may add additional AMI risk stratification information beyond that provided by CD4+ T-cell counts alone