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Performance Evaluation of One-Way Concrete Slabs Reinforced with New Developed GFRP Bars

Materials Sciences and Applications 2015年第5期6卷 420-435页

作者： Ahmed H. Ali mohammad z. afifi Bahira Abdulsalam Hesham Haggag Awad El Hashimy Tarek El-Sayed Hamdy M. Mohamed Department of Civil Engineering Helwan University Cairo Egypt Department of Civil and Environmental Engineering Western University London Canada

The incorporation of fiber-reinforced-polymer (FRP) bars in construction as a replacement to steel bars provides a superior material which is capable to overcome corrosion problems. However, serviceability requirements are important issues to be considered in the design of concrete elements reinforced with glass-FRP (GFRP) bars which are known to have larger deflections and wider crack widths as well as weaker bond compared with steel reinforced concrete. As a solution to this problem, square GFRP bars are proposed. This paper presents the results of an experimental investigation that was performed, in which newly developed square and circular GFRP bars were fabricated in the lab. Also, the GFRP bars were tested and used to reinforce concrete slabs. A total of nine full-scale GFRP-reinforced concrete (RC) one-way slabs were constructed, tested and analyz.d, considering the most influencing parameters such as the cross sectional shape of GFRP bars, reinforcement ratio, the concrete characteristics strength, and adding polypropylene fibers to the concrete mixture. The test results were showed that, the tested slabs with GFRP square bars improved the deflection and cracking behavior as well as the ultimate load.

关键词： Square and Circular Bars GFRP Reinforcement Bars Polypropylene Fibers Concrete Slabs

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A Quasi Experiment to Implement Multimodal Strategy to Improve Hand Hygiene Behavior in a Healthcare Facility in Central Saudi Arabia

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Advances in Infectious Diseases 2019年第1期9卷 49-63页

作者： Ashraf E. Saad Al-Wasila T. Al-Natig Mostafa M. Sadek Raouf M. afifi Department of Preventive Medicine Armed Forces Hospital at Wadi Al-Dawasir Riyadh KSA Infection Prevention and Control Unit Armed Forces Hospital at Wadi Al-Dawsir Riyadh KSA Sadeklab Laboratories Alexandria Egypt Formly Microbiology and Public Health Department Military Medical Academy Alexandria Egypt Community Health Research Institute International Management-Health Services Indianapolis IN USA Health Research Institute SA Consultancy and Training Cairo Egypt

Background: Hand hygiene (HH) compliance of healthcare workers (HCWs) remains suboptimal despite standard multimodal promotion, and evidence for the effectiveness of novel interventions is urgently needed. Aim: Improve HCWs’ HH compliance toward minimiz.ng healthcare associated infection (HCAI) risk in Wadi Al Dawasir Hospital (WDH), central Kingdom of Saudi Arabia (KSA). Methodology: A quasi experimental approach was adopted to achieve study aim. The HCWs’ behavior of HH during the duration between 2015 and 2016 was evaluated before and after a HH educational plan based on the World Health Organiz.tion (WHO) “Multimodal HH Improvement Strategy” (MMHHIS). The HCWs’ compliance in response to HH indications represented by the WHO’s “My 5-Moments for HH” and the type of HH action taken, whether hand washing (HW) or hand-rubbing (HR) were analyz.d. Results: The number of opportunities observed of HH performance accounted 230 in 2015 (pre-education), and 237 in 2016 (post-education). The HCWs’ HH compliance rate in the pre-education phase did not vary by the 5-moment indications [χ2(df 4) = 0.01, p = 0.98]. Conversely, the compliance rate after HH education was higher than non-compliance across all 5-moment indication opportunities (ranged between 57.0% up to 88.9%) [χ2(df 1) = 18.25, p rd and 4th 5-moment indications (“after body fluid exposure” and “after patient contact,” respectively) were met with a significant HH improvement [χ2(df 1) = 8.98, p = 0.003;and χ2(df 1) = 16.3, p −4.38, p = 0.001). Only physicians and nurses showed a significant “within-profession” improvement in HH compliance after education, compared to that before education (z.= −3.51, p = 0.001, z.= −2.48, p = 0.013, respectively). Conclusions: Applying a HH education plan based on standardiz.d multimodal HH strategy proved effective in improving the HH compliance of the hospital’s staff. An ongoing observation policy within a HH-resourceful environment assures a sustainable and so

关键词： Quasi Experiment Multimodal Strategy Hand Hygiene Healthcare Facility Central Saudi Arabia

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