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1 – 10 of over 2000Bahareh Nikmehr, Bidur Kafle and Riyadh Al-Ameri
This study aimed to review various existing methods for improving the quality of recycled concrete aggregates (RCAs) as a possible substitution for natural aggregates (NAs) in…
Abstract
Purpose
This study aimed to review various existing methods for improving the quality of recycled concrete aggregates (RCAs) as a possible substitution for natural aggregates (NAs) in concrete. It is vital as the old paste attached to the RCA weakens its structure. It is due to the porous structure of the RCA with cracks, weakening the interfacial transition zone (ITZ) between the RCA and binding material, negatively impacting the concrete's properties. To this end, various methods for reinforcement of the RCA, cleaning the RCA's old paste and enhancing the quality of the RCA-based concrete without RCA modification are studied in terms of environmental effects, cost and technical matters. Furthermore, this research sought to identify gaps in knowledge and future research directions.
Design/methodology/approach
The review of the relevant journal papers revealed that various methods exist for improving the properties of RCAs and RCA-based concrete. A decision matrix was developed and implemented for ranking these techniques based on environmental, economic and technical criteria.
Findings
The identified methods for reinforcement of the RCA include accelerated carbonation, bio deposition, soaking in polymer emulsions, soaking in waterproofing admixture, soaking in sodium silicate, soaking in nanoparticles and coating with geopolymer slurry. Moreover, cleaning the RCA's old paste is possible using acid, water, heating, thermal and mechanical treatment, thermo-mechanical and electro-dynamic treatment. Added to these treatment techniques, using RCA in saturated surface dry (SSD) mixing approaches and adding fibres or pozzolana enhance the quality of the RCA-based concrete without RCA modification. The study ranked these techniques based on environmental, economic and technical criteria. Ultimately, adding fibres, pozzolana and coating RCA with geopolymer slurry were introduced as the best techniques based on the nominated criteria.
Practical implications
The study supported the need for better knowledge regarding the existing treatment techniques for RCA improvement. The outcomes of this research offer an understanding of each RCA enrichment technique's importance in environmental, economic and technical criteria.
Originality/value
The practicality of the RCA treatment techniques is based on economic, environmental and technical specifications for rating the existing treatment techniques.
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Yi-Hung Liu, Sheng-Fong Chen and Dan-Wei (Marian) Wen
Online medical repositories provide a platform for users to share information and dynamically access abundant electronic health data. It is important to determine whether case…
Abstract
Purpose
Online medical repositories provide a platform for users to share information and dynamically access abundant electronic health data. It is important to determine whether case report information can assist the general public in appropriately managing their diseases. Therefore, this paper aims to introduce a novel deep learning-based method that allows non-professionals to make inquiries using ordinary vocabulary, retrieving the most relevant case reports for accurate and effective health information.
Design/methodology/approach
The dataset of case reports was collected from both the patient-generated research network and the digital medical journal repository. To enhance the accuracy of obtaining relevant case reports, the authors propose a retrieval approach that combines BERT and BiLSTM methods. The authors identified representative health-related case reports and analyzed the retrieval performance, as well as user judgments.
Findings
This study aims to provide the necessary functionalities to deliver relevant health case reports based on input from ordinary terms. The proposed framework includes features for health management, user feedback acquisition and ranking by weights to obtain the most pertinent case reports.
Originality/value
This study contributes to health information systems by analyzing patients' experiences and treatments with the case report retrieval model. The results of this study can provide immense benefit to the general public who intend to find treatment decisions and experiences from relevant case reports.
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Gita Gayatri, Yusniza Kamarulzaman, Tengku Ezni Balqiah, Dony Abdul Chalid, Anya Safira and Sri Rahayu Hijrah Hati
This study aims to examine the perceptions and evaluations of Muslim COVID-19 survivors and health workers regarding the halal, business and ethical attributes of hospitals during…
Abstract
Purpose
This study aims to examine the perceptions and evaluations of Muslim COVID-19 survivors and health workers regarding the halal, business and ethical attributes of hospitals during their interactions related to COVID-19 treatment.
Design/methodology/approach
Descriptive qualitative research with semi-structured online interviews was used to gather insights from COVID-19 survivors and health workers who treated COVID-19 patients. The findings were then compared with existing literature on hospital services and Sharia attributes.
Findings
The study found that patients and health-care workers in hospitals are concerned about whether the hospital follows Sharia law, the quality of health-care and hospital services and the ethical conduct of hospital staff. This is especially true during the COVID-19 pandemic, when patients are more anxious about religious conduct and the afterlife.
Research limitations/implications
Hospitals need to address halal attributes in all aspects of their services for Muslim patients and business attributes such as standard health-care quality, service quality and ethical attributes. Participants indicated that when these needs are met, they are more likely to revisit the hospital and recommend it to others.
Originality/value
This study contributes to understanding the expectations of Muslim patients regarding hospital services that meet Islamic ethical and business requirements. Using the COVID-19 pandemic as a case study broadens the understanding of how to better serve Muslim customers.
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Russell Webster, Colin Fearns, Paula Harriott, Lisa Millar, Jardine Simpson, Jason Wallace and Michael Wheatley
The purpose of this paper is to examine lived experiences of opioid agonist treatment (OAT) during and immediately following release from detention in prisons in England and…
Abstract
Purpose
The purpose of this paper is to examine lived experiences of opioid agonist treatment (OAT) during and immediately following release from detention in prisons in England and Scotland.
Design/methodology/approach
Surveys were completed by serving prisoners in both countries and by those recently released from prison (England only). The survey findings were discussed in focus groups of people with lived experience. The combined findings from the surveys and focus groups were shared with an expert group of prison OAT providers and people with lived experience with the purpose of making recommendations for more accessible and effective OAT in custodial environments and continuity of OAT on release
Findings
The quality and accessibility of OAT varied considerably between establishments. It was reported to be harder to access OAT in Scottish prisons. It was often hard for people in prison to get the dosage of OAT they felt they needed and it was generally harder to access buprenorphine than methadone in English prisons. Only Scottish people in prison were aware of long-lasting forms of buprenorphine. People in English prisons had mixed experiences of the help available in prison, with no improvement recorded since a 2016 study. People in Scottish prisons were more likely to rate the help available as poor.
Research limitations/implications
The number of people accessed while actually in prison (73) was reduced by the impact of the pandemic, making it more difficult to access people in prison and because some were resistant to participating on the basis that they had already been consulted for a wide variety of research projects focused on the impact of COVID. The Scottish cohort (a total of 19 individuals comprising 14 survey respondents and five focus group members) is clearly too small a number on which to base robust claims about differences in OAT provision between the English and Scottish prison systems..
Practical implications
The study identifies key barriers to accessing OAT in prisons and suggests key components of more user-friendly approaches.
Social implications
This study provides an overview of the recent lived experiences of people accessing OAT in prison and on release and offers valuable recommendations on how to make service provision more effective and consistent.
Originality/value
This study provides an overview of the recent lived experiences of people accessing OAT in prison and on release in England and Scotland and offers valuable recommendations on how to make service provision more effective and consistent.
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Alesandra de Araújo Benevides, Alan Oliveira Sousa, Daniel Tomaz de Sousa and Francisca Zilania Mariano
Adolescent pregnancy stands as a societal challenge, compelling young individuals to prematurely discontinue their education. Conversely, an expansion of high school education can…
Abstract
Purpose
Adolescent pregnancy stands as a societal challenge, compelling young individuals to prematurely discontinue their education. Conversely, an expansion of high school education can potentially diminish rates of adolescent pregnancy, given that educational attainment stands as the foremost risk factor influencing sexual initiation, the use of contraceptive methods during initial sexual encounters and fertility. The aim of this paper is to analyze the impact of the implementation of the public educational policy introducing full-time schools (FTS) for high schools in the state of Ceará, Brazil, on early pregnancy rates.
Design/methodology/approach
Using the difference-in-differences method with multiple time periods, we measured the average effect of this staggered treatment on the treated municipalities.
Findings
The main result indicates a reduction of 0.849 percentage points in the teenage pregnancy rate. Concerning dynamic effects, the establishment of FTS in treated municipalities results in a 1.183–1.953 percentage point decrease in teenage pregnancy rates, depending on the timing of exposure. We explored heterogeneous effects within socioeconomically vulnerable municipalities, yet discerned no impact on this group. Rigorous tests confirm the robustness of the results.
Originality/value
This paper aims to contribute to: (1) the consolidation of research on the subject, given the absence of such research in Brazil to the best of our knowledge; (2) the advancement and analysis of evidence-based public policy and (3) the utilization of novel longitudinal data and methodology to evaluate adolescent pregnancy rates.
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Shubham Bansal, Lokesh Choudhary, Megha Kalra, Niragi Dave and Anil Kumar Sharma
One of the most contested and anticipated research issues is the acceptability of using recycled aggregates instead of fresh aggregates. This study aims to look at the possibility…
Abstract
Purpose
One of the most contested and anticipated research issues is the acceptability of using recycled aggregates instead of fresh aggregates. This study aims to look at the possibility of replacing fresh aggregates with 15%, 30%, 60% and 100% recycled aggregates.
Design/methodology/approach
The research is divided into two stages. The compressive, split tensile, flexural and bond strength of the various mixes were examined in the first phase using untreated recycled concrete aggregates (RCA). The second phase entails chemically treating RCA with a 10% 0.1 M sodium metasilicate solution to evaluate differences in strength, indicating the success of the treatment performed. Microstructural experiments such as scanning electron microscopy and X-ray diffraction were also conducted to evaluate the formation of interfacial transition zone (ITZ) in treated and untreated RCA specimens.
Findings
The observed findings reveal a decrease in concrete strength with increasing RCA concentration; however, when treated RCA was used, the strengths increased significantly when compared to untreated samples. The findings also include curves indicating the correlation between compressive strength and other mechanical strength parameters for an optimum mix of concrete prepared with 30% RCA replacement.
Originality/value
The study through its novel approach, demonstrates the effect of pretreatment of RCA in the absence of any standardized chemical treatment methodology and presents significant potential in minimizing reliance on fresh aggregates used in concrete, lowering building costs and promoting the use of waste materials in construction.
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Robert J. Kane, Jordan M. Hyatt and Matthew J. Teti
The paper examines the historical shifts in policing strategies towards individuals with SMI and vulnerable populations, highlighting the development of co-response models…
Abstract
Purpose
The paper examines the historical shifts in policing strategies towards individuals with SMI and vulnerable populations, highlighting the development of co-response models, introducing the concept of “untethered” co-response.
Design/methodology/approach
This paper conducts a review of literature to trace the evolution of police responses to individuals with serious mental illness (SMI) and vulnerable populations. It categorizes four generations of police approaches—zero-policing, over-policing, crisis intervention and co-response—and introduces a fifth generation, the “untethered” co-response model exemplified by Project SCOPE in Philadelphia.
Findings
The review identifies historical patterns of police response to SMI individuals, emphasizing the challenges and consequences associated with over-policing. It outlines the evolution from crisis intervention teams to co-response models and introduces Project SCOPE as an innovative “untethered” co-response approach.
Research limitations/implications
The research acknowledges the challenges in evaluating the effectiveness of crisis intervention teams and co-response models due to variations in implementation and limited standardized models. It emphasizes the need for more rigorous research, including randomized controlled trials, to substantiate claims about the effectiveness of these models.
Practical implications
The paper suggests that the “untethered” co-response model, exemplified by Project SCOPE, has the potential to positively impact criminal justice and social service outcomes for vulnerable populations. It encourages ongoing policy and evaluative research to inform evidence-based practice and mitigate collateral harms associated with policing responses.
Social implications
Given the rising interactions between police and individuals with mental health issues, exacerbated by the COVID-19 pandemic, the paper highlights the urgency for innovative, non-policing-driven responses to vulnerable persons.
Originality/value
The paper contributes to the literature by proposing a fifth generation of police response to vulnerable persons, the “untethered” co-response model and presenting Project SCOPE as a practical example.
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Asem Abdalrahim, Mohammad Suliman, Mohammed ALBashtawy, Abdullah Alkhawaldeh and Wafa'a Ta'an
This paper aims to explore examine the therapeutic potential of head-mounted display (HMD)-based Virtual Reality Relaxation Therapy (VRRT) sessions for people individuals with…
Abstract
Purpose
This paper aims to explore examine the therapeutic potential of head-mounted display (HMD)-based Virtual Reality Relaxation Therapy (VRRT) sessions for people individuals with dementia in Jordan.
Design/methodology/approach
This cross-sectional survey recruited 75 dementia-diagnosed elderly individuals from three Jordanian care homes. A VRRT intervention comprising 10 tailored RT sessions held over the course of five weeks was administered to the participants. Apathy, cognitive performance, anxiety and depression were evaluated before and after the intervention to determine any changes. The Person-Environment Apathy Rating Scale's (PEARS) Arabic translation's validity and reliability were also evaluated.
Findings
The VRRT intervention yielded noteworthy results in reducing apathy, as indicated by a substantial decrease in PEARS scores from 17.20 to 11.15. The findings of the study revealed that the participants demonstrated enhanced cognitive abilities, as evidenced by a significant rise in their Saint Louis University Mental Status ratings, which increased from 15.11 to 19.70. The levels of anxiety and depression exhibited a significant decrease subsequent to the implementation of VRRT, with anxiety levels decreasing from 13.66 to 8.23 and depression levels decreasing from 13.62 to 9.33. Furthermore, a notable 70% of participants demonstrated statistically significant decreases in indifference.
Practical implications
This study makes a significant contribution to the advancement of innovative treatment approaches aimed at addressing the needs of the aging population, hence enhancing health outcomes and raising the quality of care in Jordan.
Originality/value
The effectiveness of VRRT in reducing apathy among Jordanian senior citizens residing in nursing homes has not yet been fully investigated. Therefore, this paper seeks to assess the effectiveness of HMD-based VRRT by conducting pre- and post-intervention evaluations. This research aims to provide valuable insights into the applicability and significance of VRRT in the Jordanian context, contributing to the development of culturally appropriate and cutting-edge therapeutic interventions for older individuals in Jordan. Through this study, the authors aim to promote improved health and elevated standards of care for this population.
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Ellie Norris, Shawgat Kutubi, Steven Greenland and Ruth Wallace
This study explores citizen activism in the articulation of a politicised counter-account of Aboriginal rights. It aims to uncover the enabling factors for a successful challenge…
Abstract
Purpose
This study explores citizen activism in the articulation of a politicised counter-account of Aboriginal rights. It aims to uncover the enabling factors for a successful challenge to established political norms and the obstacles to the fullest expression of a radical imagining.
Design/methodology/approach
Laclau and Mouffe's theory of hegemony and discourse is used to frame the movement's success in challenging the prevailing system of urbanised healthcare delivery. Empirical materials were collected through extensive ethnographic fieldwork.
Findings
The findings from this longitudinal study identify the factors that predominantly influence the transformational success of an Yaṉangu social movement, such as the institutionalisation of group identity, articulation of a discourse connected to Aboriginal rights to self-determination, demonstration of an alternative imaginary and creation of strong external alliances.
Originality/value
This study offers a rich empirical analysis of counter-accounting in action, drawing on Aboriginal governance traditions of non-confrontational discourse and collective accountability to conceptualise agonistic engagement. These findings contribute to the practical and theoretical construction of democratic accounting and successful citizen activism.
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Dawu Shu, Shaolei Cao, Yan Zhang, Wanxin Li, Bo Han, Fangfang An and Ruining Liu
This paper aims to find a suitable solution to degrade the C.I. Reactive Red 24 (RR24) dyeing wastewater by using sodium persulphate to recycle water and inorganic salts.
Abstract
Purpose
This paper aims to find a suitable solution to degrade the C.I. Reactive Red 24 (RR24) dyeing wastewater by using sodium persulphate to recycle water and inorganic salts.
Design/methodology/approach
The effects of temperature, the concentration of inorganic salts and Na2CO3 and the initial pH value on the degradation of RR24 were studied. Furthermore, the relationship between free radicals and RR24 degradation effect was investigated. Microscopic routes and mechanisms of dye degradation were further confirmed by testing the degradation karyoplasmic ratio of the product. The feasibility of the one-bath cyclic dyeing in the recycled dyeing wastewater was confirmed through the properties of dye utilization and color parameters.
Findings
The appropriate conditions were 0.3 g/L of sodium persulphate and treatment at 95°C for 30 min, which resulted in a decolorization rate of 98.4% for the dyeing wastewater. Acidic conditions are conducive to rapid degradation of dyes, while ·OH or SO4−· have a destructive effect on dyes under alkaline conditions. In the early stage of degradation, ·OH played a major role in the degradation of dyes. For sustainable cyclic dyeing of RR24, inorganic salts were reused in this dyeing process and dye uptake increased with the times of cycles. After the fixation, some Na2CO3 may be converted to other salts, thereby increasing the dye uptake in subsequent cyclic staining. However, it has little impact on the dye exhaustion rate and color parameters of dyed fabrics.
Originality/value
The recommended technology not only reduces the quantity of dyeing wastewater but also enables the recycling of inorganic salts and water, which meets the requirements of sustainable development and clean production.
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