KUFA JOURNAL OF ENGINEERING

Provision of accommodation for students is one of the primary responsibilities of the managements of Federal Government owned universities in Nigeria. The designs of these students’ halls of residence are institutional in nature, possessing certain common physical design features. The study focuses on 17 halls of residence in 4 federal universities in Southwest, Nigeria. The data collected on the physical design features (hall size, dwelling floor level, corridor length and loading) were analyzed in relation to crime experienced in the halls of residence. The findings suggest that residents in larger hall sizes experienced more crime and a significant relationship established between dwelling floor level and assault/beaten-up [λ² (6, N=618) = 17.46, p= .008] and between corridor loading and burglary/break-in [λ² (2, N=567) = 8.93, p= .012]. Hence architects and other professionals should take a critical look at these physical design features when dealing with crimes in future student housing design.

In this paper, the experimental work of this research included the test of seven concrete beams with dimensions (0.24 * 0.15 * 1.7) m. The mixing ratio is (1:2:3) and the water ratio(w/c) is 0.5. The first control beam has new aggregates and without strengthen with carbon fiber polymer sheet. The next three beams have the different ratio of recycled aggregate of (25%, 50%, 75%), and the last three beams have the different ratio of recycled aggregate of (25%, 50%, 75%) and with strengthen with carbon fiber polymer sheet. The experimental results showed that the ultimate load in the control beam (NC) became approximately (4,9,14) % respectively higher than the group of the recycle aggregate (B2. B3. B4) beams. When strengthening the beams by carbon fiber polymer sheet. The author notice the ultimate load in the control beam (NC) became approximately (20,16,0) % respectively lesser than the group of recycle aggregate (B5.B6.B7) strengthening beams.

Private developers in Nigeria’s housing development industry still face challenges of increasing housing stock, with a current housing deficit of 20 million units. Prefabrication, a known, yet unpopular housing construction method, has witnessed low usage. The effect of system characteristics on user acceptance of prefabrication technology is examined through the Perceived Usefulness (PU), of prefabrication system amongst private developers in the Nigerian housing development. The paper draws on the technology acceptance model (TAM) as the basis for investigation. A quantitative research approach and convenient sampling technique to select 400 private developers- members of the Real Estate Developers Association of Nigeria (REDAN) in Lagos and Abuja. Data obtained were analyzed using descriptive analysis and Freidman’s ANOVA test. Findings showed that prefabrication amongst private developers in Nigeria is perceived as being highly useful for increasing housing stock. PU increases the degree of positivity toward usage, which subsequently triggers the intention to adopt.

In this study, thermal performance of different pitched roofs with elevated ceiling configuration is analyzed and compared. Three different ceiling shapes, viz., cathedral, barrel-vault and A-frame, at the same pitch angle and ceiling material, under winter heating are examined numerically by solving the steady-state air and heat flow problems simultaneously. In all the roofs, the airflow fields show counter-rotating recirculating cells. The multicellular flow field promotes uniform temperature distribution within the enclosures. Heat loss to the attic from the space below increases with the closeness of the hot ceiling to the cold inclined walls. In the A-frame roof, there is uniform convective heat transfer. But in the cathedral and barrel-vault roofs, near the bottom corners, conductive heat exchange predominates. In all, the thermal performance of the barrel-vault is least while that of the cathedral is best. This observation is useful on the application of insulation when using such ceiling shapes.

White Blood Cells are important in determining a person's overall health. The blood disease diagnosis includes characterization and identification of blood samples of a patient. Neural Networks (NN), Convolutional Neural Networks (CNN), and a mix of CNN and NN models are used in recent techniques to improve visual content understanding. From start to finish, The authors were driven to uncover remarkable characteristics in example photographs because of their expertise in medical image analysis. For blood cell classification, the overall performance of individual cell patches extracted using blood smear techniques has been excellent. These approaches, on the other hand, are incapable of dealing with the issue of multiple cells overlapping. Because of the blood cell overlapping pictures, the input image dimension is compressed, the classification time is reduced, as well as the network works better with more accurate parameter estimates. In this review, we are evaluating a detailed scientific comparison of some of the ways used to improve WBC classification. The authors will show some of the ways used to automatically classify their cells. The results of some of the tests used using available data, compared to blood cell classification techniques.

The construction industry within the UK is at the forefront of new and alternative materials, which aid in efficient, sustainable and environmental-friendly construction projects. The concept of filling a single use plastic bottle with plastic waste and encasing it within a concrete surround, producing a composite block meets all three objectives. Due to the lack of ecobrick research within the UK, it became the catalyst for researching the concrete encased ecobrick block. At 7 day compressive testing the composite blocks were all weaker than the control samples and at 28 days the results were mixed. In comparison to a global study (Oman) the composite blocks were all greater in compressive strength. In conclusion, the composite blocks were found to be adequate for non-load bearing structural elements within the UK’s construction industry.