K. Arunkumar, Muthukannan Muthiah, Suresh Kumar A., Chithambar Ganesh A. and Kanniga Devi R.
Inefficient waste disposal technique and cement production methodology caused significant environmental impacts, leading to global warming. The purpose of the research was to…
Abstract
Purpose
Inefficient waste disposal technique and cement production methodology caused significant environmental impacts, leading to global warming. The purpose of the research was to invent an effective, sustainable technology to use the wastes and alternate for cement in concrete. Geopolymer technology could be the most desirable solution to use the wastes into an effective product.
Design/methodology/approach
The wood waste ash derived from nearby tea shops was used as an alternate binder for fly ash. The replacement of WWA with FA was varied from 0 to 100% at 10% intervals. In this research, setting and mechanical features of Geopolymer Concrete (GPC) along with Waste wood ash (WWA) was carried out. The influence of wood waste ash in the microstructure of the GPC was also assessed using scanning electron microscope and X-ray diffraction analysis.
Findings
The findings revealed that 30% replacement of wood waste ash was performed higher in all measured features. Besides, the formation of different phases was also observed with the inclusion of wood waste ash.
Research limitations/implications
The demand for fly ash was increased in recent years, and the fly-based GPC has required more alkaline solution and temperature curing. Hence, there was a research gap on finding an alternative binder for fly ash.
Originality/value
The research novelty was to use the wood waste ash, which has inbuilt alkaline compounds on the production of sustainable geopolymer. The finding showed that the wood waste ash could be alternate fly ash that eliminates the environmental impacts and economic thrust.
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Khaiser Nikam, A.C. Ganesh and M. Tamizhchelvan
Previously, the authors have indicated how the use of information and communications technology in India has encouraged rural development: the promotion oft digital libraries…
Abstract
Previously, the authors have indicated how the use of information and communications technology in India has encouraged rural development: the promotion oft digital libraries, e‐business, e‐learning and e‐governance have been effective ways of starting to bridge the digital divide in the sub‐continent. This follow‐up paper outlines traditional collections of significant cultural material in India which, once national information technology and knowledge management strategies are fully achieved, could form part of a digitally preserved national heritage collection.
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Pramod Kumar, Bheem Pratap and Anasuya Sahu
This study explored the effects of incorporating RA into geopolymer concrete, particularly examining its performance under ambient and elevated temperatures ranging from ambient…
Abstract
Purpose
This study explored the effects of incorporating RA into geopolymer concrete, particularly examining its performance under ambient and elevated temperatures ranging from ambient temperature to 700°C.
Design/methodology/approach
The current study incorporates RA to replace conventional aggregates in the mix, with replacement levels ranging from 0 to 50%. Each mix designation is identified by a unique ID: RA0, RA10, RA20, RA30, RA40 and RA50, representing the percentage of RA used. The alkaline-to-binder ratio adopted for this study is 0.43.
Findings
The compressive strength starts at 50.51 MPa for 0% RA and decreases to 39.12 MPa for 50% RA after 28 days. It is highest with 0% RA and diminishes as the RA content increases. All mixes show a slight increase in compressive strength when heated to 100°C. However, the compressive strength starts to decrease for all mixes at 300°C. At 700°C, there is a drastic drop in compressive strength for all mixes, indicating significant structural degradation at this temperature.
Originality/value
The study evaluates the qualitative impact of RA on the properties of geopolymer concrete when exposed to severe temperatures. The experimental setup included several tests to assess the concrete mixes' mechanical properties and responses. Specifically, the researchers conducted compressive, flexural and split tensile strength tests.
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Khaiser Nikam, A.C. Ganesh and M. Tamizhchelvan
“India lives in villages” said the Father of the Nation, Mahatma Gandhi. With 1,000 million people and 180 million households, India is one of the biggest growing economies in the…
Abstract
“India lives in villages” said the Father of the Nation, Mahatma Gandhi. With 1,000 million people and 180 million households, India is one of the biggest growing economies in the world. With the advent of the Information, Communication and Technology (ICT) revolution, India and its villages are slowly but steadily getting connected to the cities of the nation and the world beyond. Owing to the late Rajiv Gandhi, India is now a powerful knowledge economy, and though India may have been slow to start, it certainly has caught up with the West and is ahead in important respects. The Government, the corporate sector, NGOs and educational institutions have supported rural development by encouraging digital libraries, e‐business, e‐learning and e‐governance. The aim of this paper is to touch upon and highlight some of the areas where, by using ICT, the masses have been reached in this way. A follow‐up paper will outline collections of significant cultural material which, once national IT strategies are fully achieved, could form part of a digitally preserved national heritage collection.
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Balamurali Kanagaraj, Tattukolla Kiran, Anand N., Khalifa Al Jabri and Justin S.
This study aims to develop geopolymer concrete (GPC) using manufactured sand (M-sand) and recycled concrete aggregate (RCA) under different curing conditions. GPC is a sustainable…
Abstract
Purpose
This study aims to develop geopolymer concrete (GPC) using manufactured sand (M-sand) and recycled concrete aggregate (RCA) under different curing conditions. GPC is a sustainable construction material developed with industrial waste products such as fly ash to eliminate the use of cement in the production of concrete. GPC requires heat curing for the attainment of early age strength. The development of GPC under heat curing conditions is a hard process in practice. To overcome such circumstances, an attempt was made to develop the GPC under different curing conditions with the aid of coarse aggregate (CA) and RCA. The influence of different curing conditions on strength gain and microstructural characteristics of GPC is investigated. Mechanical properties of GPC such as compressive strength, tensile strength, flexural strength and elastic modulus are reported and discussed.
Design/methodology/approach
This study focuses on the assessment of mechanical and microstructure characterization of eco-efficient GPC developed with natural CA and RCAs. The required optimum quantity of binder, alkali activator, alkaline liquid to binder ratio and aggregates was determined by appropriate trials. Three types of curing methods, namely, ambient, oven and water, were used for the development of GPC mixes. Following the properties of RCA, it is realistic to substitute up to 40% of coarser aggregates as the resulting aggregate mix falls within the requirements of the analyzed mix.
Findings
Special attention is required for the mix with RCA because the mix’s consistency is affected by the high water absorption of the RCA mix. GPC specimens cured at ambient and water conditions exhibited marginal variation in the compressive strength for both CA and RCA. The compressive strength of GPC mixes prepared with RCA was marginally higher than that of the GPC made with CA under different curing regimes. RCA can be used as a sustainable material in lieu of CA in GPC.
Originality/value
The main significance of this research work is to develop the optimal mix design with appropriate mix proportion. The present study proposes a satisfactory methodology that enhances the mechanical strength of GPC as the guidelines are not available in the standards to address this problem. Effective use of waste materials such as fly ash and recycled aggregate for the development of GPC is another major research focus in the proposed investigation.
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Xingxing Li, Shixi You, Zengchang Fan, Guangjun Li and Li Fu
This review provides an overview of recent advances in electrochemical sensors for analyte detection in saliva, highlighting their potential applications in diagnostics and health…
Abstract
Purpose
This review provides an overview of recent advances in electrochemical sensors for analyte detection in saliva, highlighting their potential applications in diagnostics and health care. The purpose of this paper is to summarize the current state of the field, identify challenges and limitations and discuss future prospects for the development of saliva-based electrochemical sensors.
Design/methodology/approach
The paper reviews relevant literature and research articles to examine the latest developments in electrochemical sensing technologies for saliva analysis. It explores the use of various electrode materials, including carbon nanomaterial, metal nanoparticles and conducting polymers, as well as the integration of microfluidics, lab-on-a-chip (LOC) devices and wearable/implantable technologies. The design and fabrication methodologies used in these sensors are discussed, along with sample preparation techniques and biorecognition elements for enhancing sensor performance.
Findings
Electrochemical sensors for salivary analyte detection have demonstrated excellent potential for noninvasive, rapid and cost-effective diagnostics. Recent advancements have resulted in improved sensor selectivity, stability, sensitivity and compatibility with complex saliva samples. Integration with microfluidics and LOC technologies has shown promise in enhancing sensor efficiency and accuracy. In addition, wearable and implantable sensors enable continuous, real-time monitoring of salivary analytes, opening new avenues for personalized health care and disease management.
Originality/value
This review presents an up-to-date overview of electrochemical sensors for analyte detection in saliva, offering insights into their design, fabrication and performance. It highlights the originality and value of integrating electrochemical sensing with microfluidics, wearable/implantable technologies and point-of-care testing platforms. The review also identifies challenges and limitations, such as interference from other saliva components and the need for improved stability and reproducibility. Future prospects include the development of novel microfluidic devices, advanced materials and user-friendly diagnostic devices to unlock the full potential of saliva-based electrochemical sensing in clinical practice.
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Maedeh Gholamazad, Jafar Pourmahmoud, Alireza Atashi, Mehdi Farhoudi and Reza Deljavan Anvari
A stroke is a serious, life-threatening condition that occurs when the blood supply to a part of the brain is cut off. The earlier a stroke is treated, the less damage is likely…
Abstract
Purpose
A stroke is a serious, life-threatening condition that occurs when the blood supply to a part of the brain is cut off. The earlier a stroke is treated, the less damage is likely to occur. One of the methods that can lead to faster treatment is timely and accurate prediction and diagnosis. This paper aims to compare the binary integer programming-data envelopment analysis (BIP-DEA) model and the logistic regression (LR) model for diagnosing and predicting the occurrence of stroke in Iran.
Design/methodology/approach
In this study, two algorithms of the BIP-DEA and LR methods were introduced and key risk factors leading to stroke were extracted.
Findings
The study population consisted of 2,100 samples (patients) divided into six subsamples of different sizes. The classification table of each algorithm showed that the BIP-DEA model had more reliable results than the LR for the small data size. After running each algorithm, the BIP-DEA and LR algorithms identified eight and five factors as more effective risk factors and causes of stroke, respectively. Finally, predictive models using the important risk factors were proposed.
Originality/value
The main objective of this study is to provide the integrated BIP-DEA algorithm as a fast, easy and suitable tool for evaluation and prediction. In fact, the BIP-DEA algorithm can be used as an alternative tool to the LR model when the sample size is small. These algorithms can be used in various fields, including the health-care industry, to predict and prevent various diseases before the patient’s condition becomes more dangerous.
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S.M. Shafi and Mohammad Ishaq Lone
The purpose of this paper is to review the literature about oriental manuscript collections in India and provide an overview of the area.
Abstract
Purpose
The purpose of this paper is to review the literature about oriental manuscript collections in India and provide an overview of the area.
Design/methodology/approach
A core set of literature on oriental manuscript collections in India was retrieved after doing a thorough literature search in different databases. Literature on various aspects of this topic was reviewed. The paper is organized based on various themes to make the study fruitful for various sections of society.
Findings
Oriental manuscripts are present in different research libraries, university libraries and public libraries in India but university libraries are leading others in preserving these manuscripts, with few exceptions. Manuscripts are available in different oriental languages but mostly in Sanskrit. Every religious sect in India has contributed immensely in collecting and preserving these manuscripts. The contribution of famous kings of Indian history is also enormous in this regard.
Research limitations/implications
The review does not claim to be exhaustive, as most sources might have been skipped during the study for their non‐availability.
Originality/value
This paper provides a concise overview of manuscripts present in different Indian libraries and research institution/universities and provides a valuable entry point to the field of Indian manuscripts for research scholars, information scientists and other interested parties.
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Daniele Capuano, Maria Tagarelli De Monte, Katherine M. Groves, Maria Roccaforte and Elena Tomasuolo
In this paper, the accessibility of e‐learning environments designed for deaf learners is discussed. Starting from a discussion of the meaning of text and web accessibility, the…
Abstract
Purpose
In this paper, the accessibility of e‐learning environments designed for deaf learners is discussed. Starting from a discussion of the meaning of text and web accessibility, the paper describes the development of a Deaf‐centered E‐Learning Environment (DELE) which focusing on utilizing the visual skills of the target users. This work is conducted under the auspices of the Italian FIRB‐VISEL project (E‐Learning, Deafness, Written Language: A Bridge of Letters and Signs Towards Knowledge Society) which involves the development of a distance learning environment aimed at improving the literacy skills of prelingual deaf children and young adults.
Design/methodology/approach
The e‐learning environment is based on embodied cognition/semantics, imitation, storytelling, and the construction of educational games. Conceptual metaphors provide the browsing structure of the entire environment, in which the learning paths are developed.
Findings
DELE is currently undergoing testing in which end‐users are providing feedback about their use of the system.
Social implications
The authors think that DELE could positively affect the didactic methodology used with deaf young people, through a new visual‐based approach to teaching.
Originality/value
To the best of the authors' knowledge, this is the first time in which such a theoretical approach has been applied to an e‐learning environment for deaf users.
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Bodo B. Schlegelmilch, Kirti Sharma and Sambbhav Garg
This paper aims to illustrate the scope and challenges of using computer-aided content analysis in international marketing with the aim to capture consumer sentiments about…
Abstract
Purpose
This paper aims to illustrate the scope and challenges of using computer-aided content analysis in international marketing with the aim to capture consumer sentiments about COVID-19 from multi-lingual tweets.
Design/methodology/approach
The study is based on some 35 million original COVID-19-related tweets. The study methodology illustrates the use of supervised machine learning and artificial neural network techniques to conduct extensive information extraction.
Findings
The authors identified more than two million tweets from six countries and categorized them into PESTEL (i.e. Political, Economic, Social, Technological, Environmental and Legal) dimensions. The extracted consumer sentiments and associated emotions show substantial differences across countries. Our analyses highlight opportunities and challenges inherent in using multi-lingual online sentiment analysis in international marketing. Based on these insights, several future research directions are proposed.
Originality/value
First, the authors contribute to methodology development in international marketing by providing a “use-case” for computer-aided text mining in a multi-lingual context. Second, the authors add to the knowledge on differences in COVID-19-related consumer sentiments in different countries. Third, the authors provide avenues for future research on the analysis of unstructured multi-media posts.