ORCID Profile
0000-0002-1095-2940
Current Organisations
Queensland University of Technology
,
Monash University
,
National University of Singapore
,
Chittagong University of Engineering and Technology
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Publisher: SAGE Publications
Date: 05-2012
DOI: 10.1260/1369-4332.15.5.727
Abstract: This paper presents two novel concepts to enhance the accuracy of damage detection using the Modal Strain Energy based Damage Index (MSEDI) with the presence of noise in the mode shape data. Firstly, the paper presents a sequential curve fitting technique that reduces the effect of noise on the calculation process of the MSEDI, more effectively than the two commonly used curve fitting techniques namely, polynomial and Fourier's series. Secondly, a probability based Generalized Damage Localization Index (GDLI) is proposed as a viable improvement to the damage detection process. The study uses a validated ABAQUS finite-element model of a reinforced concrete beam to obtain mode shape data in the undamaged and damaged states. Noise is simulated by adding three levels of random noise (1%, 3%, and 5%) to the mode shape data. Results show that damage detection is enhanced with increased number of modes and s les used with the GDLI.
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 12-2022
Publisher: Elsevier BV
Date: 12-2019
Publisher: Wiley
Date: 19-05-2022
Abstract: Conventional solid fats play a crucial role as an ingredient in many processed foods. However, these fats contain a high amount of saturated fats and trans fats. Legislations and dietary recommendations related to these two types of fats set forth as a consequence of evidence showing their deleterious health impact have triggered the attempts to find alternate tailor‐made lipids for these solid fats. Oleogels is considered as a novel alternative, which has reduced saturated fat and no trans fat content. In addition to mimicking the distinctive characteristics of solid fats, oleogels can be developed to contain a high amount of polyunsaturated fatty acids and used to deliver bioactives. Although there has been a dramatic rise in the interest in developing oleogels for food applications over the past decade, none of them has been commercially used in foods so far due to the deficiency in their crystal network structure, particularly in monocomponent gels. Very recently, there is a surge in the interest in using of combination of gelators due to the synergistic effects that aid in overcoming the drawbacks in monocomponent gels. However, currently, there is no comprehensive insight into synergism among oleogelators reported in recent studies. Therefore, a comprehensive intuition into the findings reported on synergism is crucial to fill this gap. The objective of this review is to give a comprehensive insight into synergism among gelators based on recent literature. This paper also identifies the future research propositions towards developing oleogels capable of exactly mimicking the properties of conventional solid fats to bridge the gap between laboratory research and the food industry.
Publisher: Elsevier
Date: 2022
Publisher: Elsevier BV
Date: 10-2016
Publisher: Informa UK Limited
Date: 02-2022
Publisher: Elsevier BV
Date: 04-2007
Publisher: Trans Tech Publications, Ltd.
Date: 06-2020
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.995.123
Abstract: Steel structures are commonly used in seismic regions of the world because of its strength and ductility. However, these structures are still prone to damage during an earthquake. With this risk of seismic damage, the strengthening of steel structures is a major concern in order to resist the dynamic loads resulted from earthquakes. This report investigates the potential for the use of Carbon Fibre Reinforced Polymer (CFRP) to strengthen the rigid steel frame under a real earthquake load. This research will be undertaken using Strand7, a finite element (FE) analysis software. To validate the accuracy of this research, the finite analysis results have been compared to the available experimental study by the Authors. First, both FE models of a five-story bare steel frame and CFRP strengthened steel frame has been developed. Then the predicted numerical results of bare steel frame and CFRP strengthened steel frame under earthquake excitation are compared. The results indicated an increase in the seismic performance of the steel structure due to the strengthened with CFRP. The CFRP strengthened steel frame showed 15% less tip deflection compared to bare steel frame. Further analysis on the strengthening capabilities of higher thickness CFRP was performed to assess the effect of the thickness of CFRP and the higher thickness CFRP showed better seismic performance compare to normal thickness CFRP by reducing 34.38% of tip deflection.
Publisher: Elsevier BV
Date: 2021
Publisher: Worcester Polytechnic Institute - Gordon Library
Date: 2022
DOI: 10.55900/YLFSDTME
Publisher: Elsevier BV
Date: 12-2021
Publisher: Elsevier BV
Date: 06-2013
Publisher: Elsevier BV
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 03-2019
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 04-2021
Publisher: EJournal Publishing
Date: 2016
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2017
Publisher: World Scientific Pub Co Pte Lt
Date: 06-2020
DOI: 10.1142/S0219455420400027
Abstract: This study attempts to propose innovative multi-layer cement-based composites to have high impact resistance which could be used for runway. In this paper, the performances of two innovative multi-layer composite runway pavements using asphalt concrete-high strength concrete-cement-treated aggregate and asphalt concrete-high strength concrete-cement mortar in surface-base-subbase layer were evaluated under impact loads. ABAQUS/Explicit software was used to simulate loading condition and nonlinear stabilized runway pavement layers characteristics. In addition, a detailed parametric study was also carried out to explore the effects of the selected materials and load-related parameters in changing the performance of multi-layer composites. The findings of the study will be helpful to introduce protective multi-layer composite runway pavement and consequently to reduce the maintenance work of runway pavement.
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 07-2019
Publisher: Informa UK Limited
Date: 04-08-2023
Publisher: Springer Science and Business Media LLC
Date: 13-01-2016
Publisher: Springer Science and Business Media LLC
Date: 10-11-2017
DOI: 10.1038/S41598-017-11852-3
Abstract: Hair cortisol concentration (HCC) is a promising measure of long-term hypothalamus-pituitary-adrenal (HPA) axis activity. Previous research has suggested an association between HCC and psychological variables, and initial studies of inter-in idual variance in HCC have implicated genetic factors. However, whether HCC and psychological variables share genetic risk factors remains unclear. The aims of the present twin study were to: (i) assess the heritability of HCC (ii) estimate the phenotypic and genetic correlation between HPA axis activity and the psychological variables perceived stress, depressive symptoms, and neuroticism using formal genetic twin models and molecular genetic methods, i.e. polygenic risk scores (PRS). HCC was measured in 671 adolescents and young adults. These included 115 monozygotic and 183 dizygotic twin-pairs. For 432 subjects PRS scores for plasma cortisol, major depression, and neuroticism were calculated using data from large genome wide association studies. The twin model revealed a heritability for HCC of 72%. No significant phenotypic or genetic correlation was found between HCC and the three psychological variables of interest. PRS did not explain variance in HCC. The present data suggest that HCC is highly heritable. However, the data do not support a strong biological link between HCC and any of the investigated psychological variables.
Publisher: Elsevier BV
Date: 03-2021
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2020
Publisher: Elsevier BV
Date: 11-2023
Publisher: Elsevier BV
Date: 09-2006
Publisher: Informa UK Limited
Date: 2014
Publisher: Elsevier BV
Date: 09-2021
Publisher: Springer Science and Business Media LLC
Date: 10-04-2015
Publisher: Informa UK Limited
Date: 10-09-2022
DOI: 10.1080/10408398.2020.1816891
Abstract: Choice of drying methods significantly impacts the nutritive and non-nutritive compounds in fruits and vegetables. Phytochemicals such as total phenolics and total flavonoids are non-nutritive bioactive compounds and are found in plants which are of important value due to their antioxidant properties in minimizing the oxidation reaction. However, drying and storage conditions and duration significantly affect these important quality attributes. There is currently no review article on the impact of the drying and storage conditions on these quality attributes. Therefore, the aim of this review paper is to investigate the impact of drying methods on these important phytochemicals and their antioxidant activity on dried products during the storage period. Different drying methods cause desirable and undesirable changes to dried products both physically and chemically. It is found that during the drying process at various temperature ranges from 40 to 80 °C, chemical changes occurs which affects the phenolic and the flavonoid content of dried products to increase or decrease. The increase in antioxidant activity after drying is also due to oxidized polyphenols and Maillard reaction products. This results to changes in the antioxidant potential of the dried food product and its impact on the shelf life.
Publisher: Elsevier BV
Date: 11-2015
Publisher: Informa UK Limited
Date: 04-2023
Publisher: Informa UK Limited
Date: 02-03-2020
Publisher: Taylor & Francis
Date: 15-12-2004
Publisher: Springer Singapore
Date: 04-09-2020
Publisher: Elsevier BV
Date: 07-2017
Publisher: Elsevier BV
Date: 06-2021
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier
Date: 2023
Publisher: Elsevier BV
Date: 03-2019
Publisher: Elsevier BV
Date: 08-2018
Publisher: The Hong Kong Institute of Steel Construction
Date: 2016
Publisher: World Scientific Pub Co Pte Lt
Date: 09-2020
DOI: 10.1142/S0219455420420146
Abstract: In this research, ultrasonic tests were performed on a prestressed concrete box-girder model to identify the prestressed force according to the acoustoelastic theory. During the tests, the ultrasonic wave was generated using piezoelectric transducers and emitted to the prestressed concrete bridge model. The concrete bridge model was subjected to three different levels of prestress force (PF), which were limited to about 30%, 50% and 80% of the ultimate tensile strength. The experimental results showed the increase in prestress force level leads to an increase in the relative change in the wave velocity and the litude energy of the ultrasonic wave which proved the acoustoelastic effect theory. This study contributes to the knowledge of the acoustoelastic behavior of the prestressed concrete and presents the capability of the ultrasonic system in evaluating the stress state in the prestressed concrete bridge.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Springer International Publishing
Date: 27-11-2022
Publisher: Informa UK Limited
Date: 20-02-2021
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier
Date: 2022
Publisher: Elsevier BV
Date: 11-2023
Publisher: The Hong Kong Institute of Steel Construction
Date: 2014
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 11-2019
Publisher: Elsevier BV
Date: 08-2016
Publisher: Emerald
Date: 23-02-2018
Abstract: The purpose of this paper is to identify the barriers to implementing lean construction in the Kingdom of Saudi Arabia (KSA) construction industry and to prioritise the principal factors that constitute these barriers. A literature review was initially used to reveal the global barriers to implementing lean construction. Subsequently, these barriers were incorporated into a structured questionnaire, and a convenience s le of 282 construction professionals in the KSA construction industry was surveyed. The results were analysed using mean item score (MIS), Mann–Whitney U test and principal component analysis (PCA). The findings revealed 22 barriers to lean construction implementation in the KSA construction industry. Principal factors that constitute these barriers were found to be traditional practices, client related, technological, performance and knowledge and cost-related barriers in descending order of pervasiveness. The study also proposes solutions to overcome these principal barriers. This study provides a global overview of the barriers to implementing lean construction. It contributes to the body of knowledge, as it uncovers for the first time the barriers to implementing lean construction in the KSA construction industry with reference to the socio-cultural, economic and operational context of the KSA. Thus, it is relevant to other countries in the Middle East because of their shared similarities to the KSA. Furthermore, the solutions proposed to overcome these barriers in the KSA construction industry can be applied in other countries where similar barriers are identified.
Publisher: CRC Press
Date: 13-11-2017
Publisher: Elsevier BV
Date: 08-2010
Publisher: CRC Press
Date: 13-11-2018
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 12-2021
Publisher: Elsevier
Date: 2005
Publisher: Springer Science and Business Media LLC
Date: 02-2018
Publisher: Civil-Comp Press
Date: 2010
DOI: 10.4203/CCP.93.53
Publisher: Informa UK Limited
Date: 06-03-2020
Publisher: World Conference on Timber Engineering (WCTE 2023)
Date: 2023
DOI: 10.52202/069179-0414
Publisher: CRC Press
Date: 13-12-2021
Publisher: Emerald
Date: 13-09-2019
DOI: 10.1108/ECAM-03-2018-0136
Abstract: The purpose of this paper is to develop a framework for implementing lean construction and consequently to improve performance levels in the construction industry in the context of Saudi Arabia. There is currently no framework for implementing lean construction specifically tailored to the Kingdom of Saudi Arabia (KSA) construction industry. Existing lean construction frameworks are focussed on other countries and are less applicable in the KSA due to differences in socio-cultural and operational contexts. This study employs the interpretive structural modelling (ISM) technique for data collection and analysis. First, following a survey of 282 construction professionals, 12 critical success factors (CSFs) for implementing lean construction in the KSA construction industry were identified by Sarhan et al. (2016). Second, 16 of these professionals who have 15 years or more experience were exclusively selected to examine the contextual relationship among the 12 CSFs. A row and column questionnaire was used for a pairwise comparison of the CSFs. A matrix of cross-impact multiplications (MICMAC) was applied to analyse the questionnaire data to develop an ISM model that can serve as a framework for implementing lean construction. Third, the framework was subjected to further validation by interviewing five experts to check for conceptual inconsistencies and to confirm the applicability of the framework in the context of the KSA construction industry. The findings reveal that the CSFs are ided into four clusters: autonomous, linkage, dependent and driving clusters. Additionally, the findings reveal seven hierarchies of inter-relationships among the CSFs. The order of practical application of the CSFs descends from the seventh hierarchy to the first hierarchy. The new framework is a significant advancement over existing lean construction frameworks as it employs an ISM technique to specify the hierarchical relationships among the different factors that contribute to the successful implementation of lean construction. The primary value of this study is the development of a new framework that reflects the socio-cultural and operational contexts in the KSA construction industry and can guide the successful implementation of lean construction. Therefore, construction industry operators such as contractors, consultants, government departments and professionals can rely on the framework to implement lean construction more effectively and successfully.
Publisher: Springer Science and Business Media LLC
Date: 22-11-2022
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 09-2023
Publisher: University of Technology, Sydney (UTS)
Date: 31-03-2017
Abstract: The Kingdom of Saudi Arabia (KSA) has witnessed a huge increase in construction during the last two decades. However, many projects experienced time delays, cost overruns and the generation of massive amounts of waste. To address these challenges, lean construction has been introduced into the Saudi construction industry however, it is still in its infancy. This study therefore investigates the current state of lean construction implementation in the construction industry in the KSA. The objectives are to identify: the types of construction waste, level of use of tools that support the implementation of lean construction, stages of application of lean methods, and the benefits of lean construction. To achieve these objectives, a structured questionnaire survey of 282 construction professionals was carried out. After the analysis of the collected data using mean score and Anova test, the following conclusions were made. In the construction industry in the KSA, waiting is the most common type of waste, while Computer Aided Design (CAD) is the conventional tool supporting the implementation of lean construction. Furthermore, the data suggests that lean construction is most commonly used in the construction stage of projects while customer satisfaction is the main benefit derived from lean construction practices. This study concludes that the level of implementation of lean construction in the KSA construction industry is increasing. The results will help benchmark the current state of lean construction implementation, which will enable the construction industry to identify strategies to implement lean construction in Saudi Arabia in accordance with their needs and project goals, to achieve better productivity.
Publisher: Springer Singapore
Date: 07-08-2019
Publisher: Elsevier BV
Date: 2017
Publisher: Croatian Association of Civil Engineers
Date: 2015
Publisher: Elsevier
Date: 2023
Publisher: Elsevier BV
Date: 03-2021
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 09-2017
Publisher: MDPI AG
Date: 25-04-2018
DOI: 10.3390/EN11051049
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 11-2021
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 11-2021
Publisher: Springer Singapore
Date: 25-10-2021
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier BV
Date: 08-2017
Publisher: Elsevier BV
Date: 05-2003
Publisher: Elsevier
Date: 2018
Location: Bangladesh
Start Date: 2016
End Date: 2016
Funder: Australian Research Council
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