ORCID Profile
0000-0003-0639-0225
Current Organisation
Victoria University
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Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2017
Publisher: Informa UK Limited
Date: 03-05-2023
Publisher: Elsevier BV
Date: 09-2023
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 2016
Publisher: Springer International Publishing
Date: 31-08-2022
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 12-2016
DOI: 10.1016/J.VACCINE.2016.10.012
Abstract: Australia has a large immigrant population but there are few data regarding whether influenza vaccine coverage in adults varies according to country of birth. We quantified and compared self-reported influenza vaccination coverage between Australian-born and immigrant residents aged ⩾49years enrolled in a large cohort (the 45 and Up Study), surveyed in 2012 and 2013. Estimated vaccine coverage was adjusted for age, sex and other factors known to be associated with vaccine uptake. Among 76,040 participants included in the analyses (mean age 66.2years), 21.6% were immigrants. In Australian-born adults aged 49-64 and 65+ years the age- and sex-adjusted estimates for influenza vaccination within the year prior to survey was 39.5% (95% CI 38.9-40.0) and 70.9% (70.4-71.5) respectively. The corresponding estimates in immigrants were significantly lower at 34.8% (33.7-35.8) and 64.4% (63.4-65.4) respectively. Among immigrants, coverage varied by region of birth, and was slightly lower among those who spoke a language other than English at home compared to those who only spoke English. Among immigrants there was no significant difference in coverage comparing those who migrated when they were children to those who migrated as adults and coverage did not differ significantly according to years lived in Australia. Programs to increase adult vaccination coverage should consider the needs of immigrants.
Publisher: Elsevier BV
Date: 07-2023
Publisher: Springer International Publishing
Date: 17-09-2022
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 07-2020
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2023
Publisher: MDPI AG
Date: 06-02-2023
DOI: 10.3390/SU15042966
Abstract: In this study, a combination of geopolymers including Rafsanjan Natural Pozzolan (RNP), Cement Kiln Dust (CKD), and an activator such as Calcium Carbide Residue (CCR) or NaOH was used to stabilize and improve the poorly graded sandy soil. Factors such as the activator type, activator concentration, CKD and RNP content were studied. Chemical compounds of the soil and abovementioned materials were investigated using X-ray Diffraction (XRD) and X-ray Fluorescence (XRF) detection tests. Unconfined Compressive Strength (UCS) tests were carried out to evaluate the mechanical behavior of the specimens. The findings revealed that CKD, which is a hazardous byproduct, could be turned into an eco-friendly construction material through geopolymerization. The presence of CKD along with NaOH significantly increased the UCS of the s les compared to unstabilized specimens (control 1). Microstructural analyses using Scanning Electron Microscopy (SEM) confirmed the desirable distribution of the geopolymer gel in the stabilized soil. According to the SEM images, it was observed that the s les stabilized with CKD had a higher strength than those stabilized with CKD combined with RNP due to the formation of a greater amount of gel and a stable microstructure. The findings of this research promote sustainable ground improvement techniques using waste by-products.
Publisher: Springer Science and Business Media LLC
Date: 09-10-2022
Publisher: Elsevier BV
Date: 06-2021
Publisher: Elsevier BV
Date: 08-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2017
Publisher: Informa UK Limited
Date: 22-06-2023
Publisher: Informa UK Limited
Date: 19-05-2022
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2022
Publisher: MDPI AG
Date: 30-12-2022
DOI: 10.3390/RS15010204
Abstract: The damage to pipeline infrastructures caused by reactive soils has been a critical challenge for asset owners. Sustainable backfilling materials have recently gained interest to stabilize highly reactive zones as a pre-emptive approach towards sustainability. In this study, two adjacent sections of a sewer pipeline trench in Melbourne, Australia were backfilled with two blends of 100% recycled aggregates. The sites were monitored for ground deformations during October 2020–February 2022 (17 months) using surveying techniques. Interferometric synthetic aperture radar (InSAR) techniques and algorithms were also employed to estimate the ground movements of the sites and surrounding regions. The cross-validation of deformation results achieved from both techniques enabled an in-depth analysis of the effectiveness of the recycled aggregates to address reactive soil issues in urban developments. Observational deformation data and their spatiotemporal variation in the field were satisfactorily captured by the InSAR techniques: differential InSAR (DInSAR), persistent scatterer interferometry (PSI), and small baseline subset (SBAS). The SBAS estimations were found to be the closest to field measurements, primarily due to the analysis of zones without well-defined geometries. This study’s contribution to existing knowledge defines the spatiotemporal influence of sustainable backfill in areas with reactive soil through field data and satellite imaging. The relationship between InSAR techniques and actual field behavior of sustainable backfill can be a baseline for the growing construction that may be challenging to perform field monitoring due to resource constraints.
Publisher: MDPI AG
Date: 22-03-2023
DOI: 10.3390/SU15065594
Abstract: The application of recycled aggregates in the asphalt industry has been investigated in recent decades. However, low percentages of these materials have practically been used in asphalt mixtures because of the limitations set by the relevant specifications due to their performance uncertainties. This research investigates the feasibility of increasing the percentage of recycled aggregates to 100% in hot mix asphalt (HMA). Recycled concrete aggregate (RCA), recycled glass (RG), and reclaimed asphalt pavement (RAP) were used to develop HMAs suitable for roads with light to medium traffic. First, potential mix designs were proposed using an innovative approach considering the industry’s needs. Next, the volumetric properties, tensile strength, moisture sensitivity and resilient modulus response of the mixtures under different temperature conditions were determined and compared. In general, the proposed recycled material HMA exhibited superior mechanical and resilient modulus performances, i.e., 45 to 145% increase in stiffness, and up to 99% higher in Marshall stability. Furthermore, higher tensile strength ratios of the recycled material mixtures indicated a greater resistance to water damage, and hence greater durability. The findings of this research provide evidence-based insights into the increased proportion of recycled materials in the construction of asphalt pavements, thereby promoting sustainable pavement construction materials.
Publisher: Elsevier BV
Date: 04-2019
Publisher: Informa UK Limited
Date: 28-02-2022
Publisher: Informa UK Limited
Date: 02-02-2018
Publisher: Elsevier BV
Date: 10-2023
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 09-2023
Publisher: Elsevier BV
Date: 10-2023
Publisher: Elsevier BV
Date: 2022
Publisher: Elsevier BV
Date: 09-2021
Location: Iran (Islamic Republic of)
Location: Iran (Islamic Republic of)
No related grants have been discovered for Ehsan Yaghoubi.