The knowledge of engineering properties is vital in designing postharvest equipment. In this research work, some physical and thermal properties of kariya (Hildegardia barteri) kernel were studied with respect to moisture content in the range of 8.83 to 27.42 % dry basis (d.b). The surface area, geometric mean diameter, arithmetic mean diameter, bulk density, true density, aspect ratio, sphericity, volume and porosity ranged between 154.09 and 200.29 mm2, 7.75 and 8.64 mm, 144.40 and 216.66 mm, 0.65 and 0.72 kg/m3, 1.01 and 1.29 kg/m3, 0.64 and 0.69 mm3, 12.40 and 14.59, 226.94 and 340.23 cm3 and 40.28 and 98.46, respectively. The static coefficient of friction ranged from 0.42 and 0.53; 0.40 and 0.51; 0.42 and 0.52 for galvanized steel, stainless steel and glass surface respectively. Thermal properties were found to increase from 0.17 to 0.51 kJ/kgK, 1.2 to 2.0 x 10-7m2/s and 1.43 to 2.73 W/moC, for specific heat, thermal diffusivity and thermal conductivity respectively. Models were established for all the parameters measured for the kariya kernel as a function of moisture content, with high correlation coefficients. These models can adequately predict the properties within the moisture range examined.

The development of a Web-based learning environment is time-consuming and complex. Hypermedia and interactive aspects are problem-specific and usually require a special authoring tool. This article describes how the development of hypermedia environments for computer graphics is preceded by the development of a hypermedia authoring tool. The implemented architecture is presented, which meets the requirements with regard to the inexpensive construction of a new environment, its consistent modification, its step-by-step internationalization, personalization and the integration of interactive virtual experiments and learning methods.

Internet-of-Things (IoT) has made ubiquitous computing a reality through extending Internet connectivity in numerous applications deployed throughout the globe. The combination of IoT-based cloud structures included with smart systems that offer smart objectives and programs are a promising future trend. Cloud computing is tremendously efficient, storage is becoming more and more vast, and a few groups are now changing their data from in house data to Cloud Computing Vendors' hubs. As a result, a few new classes of safety and privacy problems are introduced. This paper provides security problems relating to the IoT cloud.

The characterization of char from waste tyre pyrolysis is evaluated in this work. Disused tyres retrieved from vehicle users and dump hills in Akure and its environment in South West Nigeria were pyrolysed in a refurbished 17.4 litre capacity fixed-bed batch thermochemical reactor. The waste tyres were cut into sample sizes of 20 mm × 30 mm manually and then weighed into various portions of 1kg each. 1kg mass of the washed waste tyres was pyrolysed in each batch of pyrolysis experiment to obtain char at different pyrolysis temperatures of 250oC, 350oC, 450oC, and 600oC respectively. Proximate and ultimate analyses of the char resulting from the pyrolysis were carried out. The pyrolysis process produced char with an average of 83.30% carbon composition 5.45% hydrogen, 0.52% nitrogen, 1.17% sulphur and 1.90% oxygen composition. The analysis of percentage composition of the raw scrap tyre samples gave 79.86% for carbon, 7.35% hydrogen, 0.39% nitrogen, 1.57% for sulphur and 6.50% for oxygen. The ultimate analysis of the char resulting from pyrolysis gave an average value of 38.83 kJ/kg for the heating value and 470.00 kg/m3 for specific gravity. The average fixed carbon content was 33.38% while the volatile matters gave an average of 58.40%. The ultimate analysis of the raw tyre samples gave values of 36.10 kJ/kg for the heating value and 343.00 kg/m3 for specific gravity.

The study examined the use and potency of extruded exudates/resins obtained from tree trunks. The gummy exudates/resins were applied directly to the steel reinforcement by the coatings varying their thicknesses and embeddings them into concrete beams, and studying their possible effects as an inhibitor to corrosion attacks on reinforcing steel of concrete structures built within the coastal marine region with highly acidic nature. From the flexural strength test, the maximum value was 24.64% compared to the corroded and coated sample values of -18.46% and 24.41%, respectively and the average differential and percentile range controlled (2.25kN and 2.01%), corroded (0.66kN and 1.16%), coated (2.09kN and 1.77%). The results illustrated that the reference percentage of controlled samples according to [30] was placed in fresh water and no corrosion effect was observed and was therefore used as a reference value for uncoated and coated samples immersed in a corrosive environment as described in the test program. The calculated average differential and percentile values were checked (0.01mm and 0.009%), corrosion values (0.01mm and 0.063%) and closed values (0.01mm and 0.069%). The results illustrated the effect of corrosion on the mechanical properties of reinforcing steel with a decrease in diameter, as well as a decrease in the average value and the percentage recorded from the corrosion samples, while the controlled and coated samples illustrated preserved conditions with increasing layers of different diameters of exudates/resin layer thickness. The cross-sectional area of reinforcing steel after corrosion test gives different average and percentile values of corroded values (0.02 mm and 4.84%) and coated values (0.03 mm and 1.57%). The calculated maximum comparative values for both yield and ultimate tensile strength for the controlled samples were 9.66% and 3.54% to the corroded and coated values of -7.45% and -3.7%, coated values are 9.66% and 3.86%, respectively. From the data obtained and compared, the yield strength and ultimate tensile strength values of the corroded samples illustrated a decrease in the average and percentage values for load failure with few applications. The average differential and percentile values obtained for the control were (0.01 and 1.4%), corrosion values (0.02 and 1.54%), and closed values (0.01 and 1.4%). The maximum elongation comparative value for the controlled sample was -12.92% compared to the corroded and coated sample of 20.62% and -23.82%, respectively. The average differential and percentile values obtained for the controlled samples were (0.83% and 0.77%), corrosion values (0.82% and 1.38%), and coated values (0.82% and 0.78%). In comparative, the corroded samples illustrated higher stress values and higher elongation rates, whereas the damaged state of coated samples was lower load and reduced elongation. The calculated data illustrated a decrease in the value of the corroded sample as a result of the corrosion attack, which led to a decrease in the registered weight, whereas the coated sample illustrated an increase in weight compared to the reference value of the controlled sample due to the different coating thicknesses.

This research work investigated the application of Chrysophyllum albidum exudates/resin extracts as potential inhibitors in the control and prevention of corrosion attacks to reinforcing steel embedded in concrete slabs and are completely immersed in 5% sodium chloride (NaCl) solution in water and accelerated for a rapid corrosion process for 360 days with interval checks and routine tests of 90 days, 180 days, 270 days, and 360 days for examination and record documentations for comparison of tested sample performances. The maximum yields of controlled and coated samples were -112.42 mV and -118.97 mV, which showed the relationship between corrosion potential and opportunity in the reference range as 𝐸corr > −200mV and the uncoated samples, the calculated maximum value is -338.49 mV, the result is within the reference value of the dependence between corrosion potential and probability of −350mV ≤ 𝐸corr ≤ −200mV indicating a high-value range of 10% or an uncertain corrosion probability. The comparative results from the referencing range (controlled), showed that corroded samples exhibited corrosion presence resulting from the induced corrosion acceleration against coated samples that exhibited absence of corrosion. The results of the controlled concrete and armored resistance samples obtained at the maximum average value of 15.06kΩcm and 16.12kΩcm with a data value of 10 < 𝜌 < 20 (low) compared to a corrosion value of 9.82 k cm with a specification of 5 < 𝜌 < 10 (high). The calculated maximum percentage value of the controlled yield point is 7.05% relative to corrosion and coverage value -6.54% and 7.12% and the possible differential values of 0.02% controlled, 0.02% corroded, and 0 .15% covered. The percentage of maximum tensile strength calculated in the control is 2.39% relative to the corrosion and coating value -3.35% and 3.51% and the potential differential value is 0.04% controlled, 0.01% corroded and 0.04% coated. The yield strength, tensile strength, and deformation ratio of the mean, percentile, and controlled differential potential values, uncoated (corroded) and layered concrete slab samples were determined. , coated samples had higher breaking loads compared to corroded samples with reduced breakdown load and low load-bearing capacity and with mean and percentile values in relation to the reference range, whereas uncoated (corroded) samples, had a load-bearing capacity which is low and a reduced value compared to the reference range.For comparison, the results of corroded samples showed a decrease in value compared to the diameter of the reinforcement before and after the induction accelerated corrosion test with a percentage decrease in value from 0.428% to -1.48% and an average value in the range from 11.93 mm to 11. 88 mm.The differentials in mean values and relative percentiles between coated and corroded samples ranged from 69.57% to -41.03%. The decrease in mean and percentage values indicates that the corrosion effect causes a decrease in diameter and cross-sectional area, fiber degradation, rib reduction, and surface modification, while the exudate/resin-coated elements are validated in the work due to differential s in coating thickness. For comparison, the results obtained show a reduction/reduction and reduction of mean and percentile values for coatings with 0.070kg to 0.06kg and corrosion 7.81% to -5.8%. The summary results show that the corrosive effect had an impact on the rebar embedded in the concrete slab samples exposed to induced corrosion