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This study aims to predict the fracture properties of geopolymer concrete, which is necessary for studying failure behaviour of concrete.

Geopolymers are new alternative binders for cement in which polymerization gives strength to concrete rather than through hydration. Geopolymer concrete was developed from industrial byproducts such as GGBS and dolomite. Present study estimates the fracture energy of GGBS geopolymer concrete using three point bending test (RILEM TC50-FMC) with different percentages of dolomite and compare with cement concrete having same strength.

The fracture properties such as peak load, critical stress intensity factor, fracture energy and characteristic length are found to be higher for GGBS-dolomite geopolymer concrete, when their proportion becomes 70:30.

To the best of the authors’ knowledge, this is an original experimental work.

Roller compacted concrete (RCC) pavement is used in areas subjected to heavy impact loads; therefore, higher impact resistance is a desirable property of consideration. This study aims to investigate the effect of partial replacement of fine aggregate with crumb rubber (CR) and the addition of nanosilica (NS) by weight of cementitious materials on the impact resistance of roller compacted rubbercrete (RCR).

Four replacement levels of CR (0, 10, 20 and 30 per cent) and four addition levels of NS (0, 1, 2 and 3 per cent) were considered. The impact resistance test was carried out using the drop weight test recommended by ACI 544.

The results showed that the impact resistance of RCR increases with an increase in both CR and NS addition, though for CR above 20 per cent, sudden drop in impact resistance was observed. However, NS reduces the ductility of RCR by decreasing the post-cracking impact resistance. Response surface methodology was used to develop models for predicting the impact resistance of RCR, and the developed models showed a high degree of correlation. As a result of wide variations in the impact drop test data, two-parameter Weibull distribution function was used for the data analysis, and it was found that the probabilistic distributions of the first crack and ultimate failure impact resistance follow the two-parameter Weibull distribution function.

In this work, the effect of partial replacement of fine aggregate with CR and the addition of NS by weight of cementitious materials on the impact resistance of RCC pavement has been investigated. CR has been used to increase the impact resistance of RCC Pavement.

Currently, many experimental studies on the properties and behavior of rubberized concrete are available in the literature. These findings have motivated scholars to propose models for estimating some properties of rubberized concrete using traditional and advanced techniques. However, with the advancement of computational techniques and new estimation models, selecting a model that best estimates concrete's property is becoming challenging.

In this study, over 1,000 different experimental findings were obtained from the literature and used to investigate the capabilities of ten different machine learning algorithms in modeling the hardened density, compressive, splitting tensile, and flexural strengths, static and dynamic moduli, and damping ratio of rubberized concrete through adopting three different prediction approaches with respect to the inputs of the model.

In general, the study's findings have shown that XGBoosting and FFBP models result in the best performances compared to other techniques.

Previous studies have focused on the compressive strength of rubberized concrete as the main parameter to be estimated and rarely went into other characteristics of the material. In this study, the capabilities of different machine learning algorithms in predicting the properties of rubberized concrete were investigated and compared. Additionally, most of the studies adopted the direct estimation approach in which the concrete constituent materials are used as inputs to the prediction model. In contrast, this study evaluates three different prediction approaches based on the input parameters used, referred to as direct, generalized, and nondestructive methods.

The aim of the work is to investigate structural behaviour of reinforced concrete (RF) beam retrofitted with basalt fibre (BF) fabric. The incorporation of BF showed enhancement in bending strength, to increase confinement and to repair damages caused by cracking. In the early decades, using BF for composite materials shaped BF as an excellent physical substance with necessary mechanical properties, highlighting the significant procedures ability.

Specimens were casted with U-wrapped BF and then evaluated based on flexural tests. In the test carried over for flexural fortifying assessment, BF reinforcements demonstrated a definitive quality improvement in the case of the subjected control sample; ultimately, the end impacts depend upon the applied test parameters. From the outcomes introduced in this comparison, for the double-wrapped sample, the modifications improved by 12% than that of the single-wrapped beam, which is identified to subsist for a better strengthening of new-age retrofitting designs.

The current research deals with the retrofitting of RC beam by conducting a comparative experiment on wrapping of BF (single or double BF wrapping) in improving the mechanical behavior of concrete.

It can be shown from the experimental results that increasing the number of layers has significant effect on basalt strengthened beams.

This study aims to explore the relationship between institutional and macroeconomic factors and corporate financial flexibility while also investigating the moderating impact of selected board governance mechanisms on this relationship.

The sample of the study comprises 174 firms listed on the Colombo Stock Exchange for a period of eight years, from 2014 to 2021. Data were collected from secondary sources, and both descriptive and inferential statistical techniques were used for analyses.

Corporate financial flexibility is notably affected by profitability as an institutional factor and by gross domestic product growth rate and banking sector development as macroeconomic factors. Furthermore, the relationship between a company’s profitability and corporate financial flexibility is found to be moderated by selected board governance mechanisms. However, these governance mechanisms do not influence the relationship between corporate financial flexibility and other institutional factors (i.e. other than profitability) and macroeconomic factors considered in this study.

This study adds a fresh perspective to the existing body of knowledge in the field of corporate finance by emphasizing the interaction effect of board governance mechanisms on the association between macroeconomic and institutional variables and financial flexibility of firms. The findings are expected to be useful for business decision-makers in managing their corporate financial flexibility effectively and maximizing the use of their financial resources.

The purpose of this paper is to conduct a forensic analysis of Google Allo messenger on an Android-based mobile phone. The focus was on the analysis of the data stored by this application in the internal memory of the mobile device, with minimal use of third-party applications. The findings were compared with the already existing works on this topic. Android is the most popular operating system for mobile devices, and these devices often contain a massive amount of personal information about the user such as photos and contact details. Analysis of these applications is required in case of a forensic investigation and makes the process easier for forensic analysts.

Logical acquisition of the data stored by these applications was performed. A locked Android device was used for this purpose. Some scripts are presented to help in data acquisition using Android Debug Bridge (ADB). Manual forensic analysis of the device image was performed to see whether the activities carried out on these applications are stored in the internal memory of the device. A comparative analysis of an existing mobile forensic tool was also performed to show the effectiveness of the methodology adopted.

Forensic artifacts were recovered from Allo application. Multimedia content such as images were also retrieved from the internal memory.

As this study was conducted for forensic analysis, it assumed that the mobile device used already has USB debugging enabled on it, although this might not be the applicable in some of the cases. This work provides an optimal approach to acquiring artifacts with minimal use of third-party applications.

Most of the mobile devices contain messaging application such as Allo installed. A large amount of personal information can be obtained from the forensic analysis of these applications, which can be useful in any criminal investigation.

This is the first study which focuses on the Google Allo application. The proposed methodology was able to extract almost as much as the data obtained using earlier approaches, but with minimal third-party application usage.

The purpose of this paper is to determine the relationship between parental child feeding practices with growth status of Orang Asli (OA) children in Negeri Sembilan.

This is a cross-sectional study conducted amongst 190 OA children aged 4–6 years studying at Tabika KEMAS OA in Negeri Sembilan. Mothers were interviewed to obtain socio-demographic information while feeding practices were assessed using Malay version of Comprehensive Feeding Practices Questionnaire (CFPQ-M). Growth status of the children were determined using WHO ANTHRO Plus software. Three indicators of growth status assessed were weight-for-age (WAZ), height-for-age (HAZ) and body mass index (BMI)-for-age (BAZ) z-scores.

The mean score for feeding practices used by the mothers while feeding their child showed that most of the mothers practiced modelling (3.71 ± 0.82), encouraging balance and variety (3.52 ± 0.76) and environment (3.66 ± 0.66) while the practice of restriction to weight (1.85 ± 0.79) and emotional regulation (2.20 ± 0.96) were low. Most of the OA children had normal WAZ (70.0%), HAZ (71.1%) and BAZ (84.2%). Amongst the three indicators of growth status, BAZ was used to study the relationship with feeding practices. The use of feeding practices such as pressure (r = −0.34, p < 0.01), food as a reward (r = −0.23, p=<0.01), child control (r = −0.18, p = 0.01) and restriction to weight (r = 0.19, p = 0.01) were associated with BAZ.

This study only focussed on OA children of Temuan and Semelai sub-ethnics studying at kindergarten specific for OA children, thus findings could not be generalised to the entire OA population in Malaysia.

There is a need to address the OA population as they continue to be amongst the most disadvantaged population often affected with poor health and social outcomes.

In this study, a wide range of scales in that represents different feeding practices in CFPQ-M was assessed instead of focussing on limited type of feeding practices. Thus, a better understanding was observed regarding the healthy and unhealthy feeding practices. The result of this study could be useful to update the existing literature of OA research, and to plan suitable interventions with regards to feeding practices and growth status of the children, especially amongst this vulnerable community.

Online cart abandonment is a severe issue posing challenges to e-commerce growth. Emerging economies such as India fascinates global marketing practitioners because of favorable demographics and high levels of internet penetration. This study aims to consider the role of certain exogenous factors in developing shopping motivations that sequentially mediate to online purchase completion through impulsiveness under risk perceptions. The primary motivation behind this study is to understand the mental mechanism among online customers that develop purchase completion intentions, which prevent cart abandonment significantly.

Impact of e-commerce exogenous factors related to e-commerce such as website attributes, product features, promotional excellence and decision-making easiness on shopping motivations, impulsiveness and purchase completions intentions under the moderating effect of risk was estimated from the perceptions of Indian online customers (n = 243) using variance-based structural equation modeling and SPSS process macro v.3.0.

The most important exogenous variable that can influence purchase completion directly, sequentially through shopping motivations is decision easiness and promotions. Even though utility motivations are dominant in purchase completion intentions, hedonistic aspects are more critical in developing impulsiveness. The translation of impulsiveness to purchase completion is happening, but risk perception significantly moderates impulsiveness formation.

Theoretically, this study examined online purchase completions being the most sought response by a customer to various stimuli in e-commerce. The study adopted a moderated mediation analysis in which shopping motivations and impulsiveness were mediators and risk as moderator. The interaction effect of risk on purchase completions was significant even when the mediating effects were prominent.

Contributes to the current knowledge-related online buying behavior in virtual retail formats and helps marketers in streamlining their focus in using impulsiveness as a strategic tool in reducing cart abandonment.

This study helps in understanding emerging trends in online buying behavior in India.

Omnichannel retailing has changed the behaviour of consumers by empowering activities like showrooming which is the process of collecting product information in store then making the purchase online. Since individuals, particularly Millennials, interact with multiple touchpoints throughout their shopping journey, retailers must consider how these experiences influence purchasing behaviour. Literature regarding showrooming has focussed primarily on antecedents to the phenomenon and the negative effects to brick and mortar retailers, however limited studies have investigated the quantitative influence of showrooming from the consumers' perspective. While data show that interest in online shopping is spiking, a vast majority of retail sales are made in-store suggesting barriers to online shopping still exist. Thus, the purpose of this research is to identify the role of showrooming in decreasing risk in an online shopping context. Additionally, Millennial generational cohorts (MGCs) were proposed as moderators in exploring the differences between the dimensions of perceived risk and online shopping intention.

To explore the relationship between showrooming and MGCs online shopping behaviour an online survey was administered. Data were collected from 480 Millennial consumers at a large southwestern university. Multiple linear regression was used to determine the direction, magnitude and significance of relationships within the models.

Results from the analysis revealed showrooming and MGCs influence online shopping behaviour as it relates to dimensions of risk. Moreover, showrooming increased online shopping intention specifically in relation to product and financial risk.

This paper contributes to the relevant literature by proposing a relationship between showrooming and online shopping behaviour. This research provides evidence that Millennials are not a monolithic generation and consume differently.

This paper aims to prepare high corrosion-resistant chromium-free zinc-aluminum (Zn–Al) coatings reinforced with multi-walled carbon nanotubes (MWCNTs) and nano-ZnO particle composites.

The morphology, composition and corrosion resistance of the coatings were analyzed by electrochemical tests, water contact angle tests, immersion tests, scanning electron microscopy/energy dispersive spectrometer and X-ray diffraction.

The composite coating with 0.3% MWCNTs and 0.5% nano-ZnO particles demonstrated both high shielding performance and cathodic protection performance, which was attributed to the porosity filling of MWCNTs and nano-ZnO particles together with the electrical connection of MWCNTs between the zinc and aluminum powders.

This work laid an experimental foundation for the preparation and corrosion mechanism of high corrosion-resistant chromium-free Zn–Al coating reinforced with MWCNTs and nano-ZnO particles.