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Article
Publication date: 14 October 2019

Rajendran N., Jawahar P.K. and Priyadarshini R.

The purpose of this paper is to apply security policies over the mobile ad hoc networks. A mobile ad hoc network refers to infrastructure-less, persistently self-designing…

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Abstract

Purpose

The purpose of this paper is to apply security policies over the mobile ad hoc networks. A mobile ad hoc network refers to infrastructure-less, persistently self-designing systems; likewise, there is a noteworthy innovation that supplies virtual equipment and programming assets according to the requirement of mobile ad hoc network.

Design/methodology/approach

It faces different execution and effectiveness-based difficulties. The major challenge is the compromise of performance because of unavailable resources with respect to the MANET. In order to increase the MANET environment’s performance, various techniques are employed for routing and security purpose. An efficient security module requires a quality-of-service (QoS)-based security policy. It performs the task of routing and of the mobile nodes, and it also reduces the routing cost by finding the most trusted node.

Findings

The experimental results specify that QoS-based security policy effectively minimizes the cost, response time as well as the mobile makespan (routing cost and response time) of an application with respect to other existing approaches.

Research limitations/implications

In this paper, the authors proposed an enhancement of Cross Centric Intrusion Detection System named as PIHNSPRA Routing Algorithm (PIHNSPRA).

Practical implications

It maps the security with the secure IDS communication and distributes the packets among different destinations, based on priority. This calculation is proposed for the purpose of routing and security by considering greatest throughput with least routing cost and reaction time.

Social implications

When the concept is applied to practical applications. Quality of Service introduced in the proposed research reduces the cost of routing and improves the throughput.

Originality/value

The proposed calculation is tested by NS2 simulator and the outcomes showed that the execution of the calculation is superior to other conventional algorithms.

Details

International Journal of Intelligent Unmanned Systems, vol. 7 no. 4
Type: Research Article
ISSN: 2049-6427

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Article
Publication date: 14 October 2019

Priyadarshini R., Latha Tamilselvan and Rajendran N.

The purpose of this paper is to propose a fourfold semantic similarity that results in more accuracy compared to the existing literature. The change detection in the URL and the…

88

Abstract

Purpose

The purpose of this paper is to propose a fourfold semantic similarity that results in more accuracy compared to the existing literature. The change detection in the URL and the recommendation of the source documents is facilitated by means of a framework in which the fourfold semantic similarity is implied. The latest trends in technology emerge with the continuous growth of resources on the collaborative web. This interactive and collaborative web pretense big challenges in recent technologies like cloud and big data.

Design/methodology/approach

The enormous growth of resources should be accessed in a more efficient manner, and this requires clustering and classification techniques. The resources on the web are described in a more meaningful manner.

Findings

It can be descripted in the form of metadata that is constituted by resource description framework (RDF). Fourfold similarity is proposed compared to three-fold similarity proposed in the existing literature. The fourfold similarity includes the semantic annotation based on the named entity recognition in the user interface, domain-based concept matching and improvised score-based classification of domain-based concept matching based on ontology, sequence-based word sensing algorithm and RDF-based updating of triples. The aggregation of all these similarity measures including the components such as semantic user interface, semantic clustering, and sequence-based classification and semantic recommendation system with RDF updating in change detection.

Research limitations/implications

The existing work suggests that linking resources semantically increases the retrieving and searching ability. Previous literature shows that keywords can be used to retrieve linked information from the article to determine the similarity between the documents using semantic analysis.

Practical implications

These traditional systems also lack in scalability and efficiency issues. The proposed study is to design a model that pulls and prioritizes knowledge-based content from the Hadoop distributed framework. This study also proposes the Hadoop-based pruning system and recommendation system.

Social implications

The pruning system gives an alert about the dynamic changes in the article (virtual document). The changes in the document are automatically updated in the RDF document. This helps in semantic matching and retrieval of the most relevant source with the virtual document.

Originality/value

The recommendation and detection of changes in the blogs are performed semantically using n-triples and automated data structures. User-focussed and choice-based crawling that is proposed in this system also assists the collaborative filtering. Consecutively collaborative filtering recommends the user focussed source documents. The entire clustering and retrieval system is deployed in multi-node Hadoop in the Amazon AWS environment and graphs are plotted and analyzed.

Details

International Journal of Intelligent Unmanned Systems, vol. 7 no. 4
Type: Research Article
ISSN: 2049-6427

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Article
Publication date: 1 January 1995

N. Rajendran, K. Ravichandran and S. Rajeswari

Sulphur dioxide, a dangerous atmospheric pollutant, is a major concern with the increasing use of coal as a combustion fuel in thermal power plants. Numerous efforts were made…

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Abstract

Sulphur dioxide, a dangerous atmospheric pollutant, is a major concern with the increasing use of coal as a combustion fuel in thermal power plants. Numerous efforts were made through these years to minimize the emission of sulphur dioxide and one such effort is the desulphurization of the flue gas generated during combustion, commonly termed as flue gas desulphurization (FGD). However, the materials of construction used for FGD systems, usually of type 316L stainless steel were reported to be failed due to the localized corrosion attack by the aggressiveness of the environment, mainly of chloride, fluoride, acidity and temperature encountered during the scrubbing of SO2.

Details

Anti-Corrosion Methods and Materials, vol. 42 no. 1
Type: Research Article
ISSN: 0003-5599

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Book part
Publication date: 25 November 2014

Steven B. Scyphers and Susannah B. Lerman

Climate change is a global threat to social, economic, and environmental sustainability. In an increasingly urbanized world, homeowners play an important role in climate…

Abstract

Purpose

Climate change is a global threat to social, economic, and environmental sustainability. In an increasingly urbanized world, homeowners play an important role in climate adaptation and environmental sustainability through decisions to landscape and manage their residential properties.

Methodology/approach

In this chapter, we review the potential impacts of climate change on environmental sustainability in urban ecosystems and highlight the role of urban and suburban residents in conserving biodiversity. We focus extensively on the interactions of homeowners and residential landscapes in urban coastal and desert environments.

Practical implications

Understanding how human-environment interactions are linked with a changing climate is especially relevant for coastal and desert cities in the United States, which are already experiencing visible impacts of climate change. In fact, many homeowners are already making decisions in response to environmental change, and these decisions will ultimately shape the future structure, function and sustainability of these critically important ecosystems.

Social implications

Considering the close relationship between biodiversity and the health and well-being of human societies, understanding how climate change and other social motivations affect the landscaping decisions of urban residents will be critical for predicting and enhancing sustainability in these social-ecological systems.

Details

From Sustainable to Resilient Cities: Global Concerns and Urban Efforts
Type: Book
ISBN: 978-1-78441-058-2

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Article
Publication date: 1 March 1995

N. Rajendran and S. Rajeswari

The emission of SO2, a dangerous atmospheric pollutant, is the major problem with increasing the use of coal as fuel in various industries, particularly in thermal power plants. A…

38

Abstract

The emission of SO2, a dangerous atmospheric pollutant, is the major problem with increasing the use of coal as fuel in various industries, particularly in thermal power plants. A variety of methods for minimizing the SO2 emission have been reported in the literature, among which the desulphurization of the flue gas, generated by combustion of coal receives much attention and is termed as flue gas desulphurization (FGD). FGD scrubbers have found widespread use in thermal power plants, smelters, incinerators and various refining operations. The scrubber parts must resist corrosion from solution which have a varying degree of acidity and erosion, besides containing substantial concentrations of chlorides and SO2, and the unfavourable conditions of fluctuations in temperature. The currently‐used type 316L stainless steel material in many FGD installations, were reported to have failed, due to the localized corrosion attack by the aggressiveness of the environment encountered during scrubbing of SO2. Normally, the improvement in corrosion performance of the construction materials can be achieved by:

Details

Anti-Corrosion Methods and Materials, vol. 42 no. 3
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 August 2005

R. Ravichandran, S. Nanjundan and N. Rajendran

Copper and its alloys are widely used in industries because of their good resistance to corrosion and are often used in cooling water systems. Brass has been widely used for…

963

Abstract

Purpose

Copper and its alloys are widely used in industries because of their good resistance to corrosion and are often used in cooling water systems. Brass has been widely used for shipboard condensers, power plant condensers and petrochemical heat exchangers. Brass is susceptible to the corrosion process known as dezincification by means of which brass looses its valuable physical and mechanical properties leading to failure of structure. The aim of this investigation was to control the dezincification of brass in 3 per cent NaCl solution using benzotriazole (BTA) derivatives.

Design/methodology/approach

BTA derivatives namely 1‐hydroxymethylbenzotriazole (HBTA) and N,N‐dibenzotriazol‐l‐ylmethylamine(ABTA) were synthesised and their inhibition behaviour on brass in 3 per cent NaCl solution was investigated by the weight‐loss method, potentiodynamic polarisation, electrochemical impedance and solution analysis techniques. The morphology of the brass after corrosion in the presence and absence of the BTA derivatives was examined using scanning electron microscopy (SEM).

Findings

Potentiodynamic polarisation studies showed that the BTA derivatives investigated were mixed type inhibitors, inhibiting the corrosion of brass by blocking the active sites of the brass surface. Changes in the impedance parameters (charge transfer resistance and double layer capacitance) were related to the adsorption of BTA derivatives on the brass surface, leading to the formation of a protective film. Solution analysis revealed that the BTA derivatives excellently controlled the corrosion of brass. SEM micrographs showed the formation of compact surface film on the brass surface in the presence of inhibitors, thereby providing better corrosion inhibition.

Originality/value

Contributes to research on corrosion protection for copper and its alloys.

Details

Anti-Corrosion Methods and Materials, vol. 52 no. 4
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 April 1996

Mohammed Y.A. Rawwas, K.N. Rajendran and Gerhard A. Wuehrer

When countries differ in the perceived quality of their products, country‐of‐origin (CO) labelling influences consumer choice. While the influence of nationalism on perceived…

4550

Abstract

When countries differ in the perceived quality of their products, country‐of‐origin (CO) labelling influences consumer choice. While the influence of nationalism on perceived quality has been well documented in the literature, the effect of worldmindedness has not been examined in this context. Primarily explores the role of worldmindedness in product quality perception. Confirms the impact of CO and nationalism on product evaluation. In studying 593 Austrian consumers, the research finds the effect of CO is moderated by the characteristics of consumer groups. Reveals that the effect of worldmindedness on product evaluation is enhanced for foreign products and is diminished for domestic products, however, the impact of nationalism on product evaluation is enhanced for domestic products and is diminished for foreign products. Suggests promotional and positioning implications for targeting both groups.

Details

International Marketing Review, vol. 13 no. 2
Type: Research Article
ISSN: 0265-1335

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Article
Publication date: 2 September 2024

R. Rajaraman

This study explores the immobilisation of enzymes within porous catalysts of various geometries, including spheres, cylinders and flat pellets. The objective is to understand the…

54

Abstract

Purpose

This study explores the immobilisation of enzymes within porous catalysts of various geometries, including spheres, cylinders and flat pellets. The objective is to understand the irreversible Michaelis-Menten kinetic process within immobilised enzymes through advanced mathematical modelling.

Design/methodology/approach

Mathematical models were developed based on reaction-diffusion equations incorporating nonlinear variables associated with Michaelis-Menten kinetics. This research introduces fractional derivatives to investigate enzyme reaction kinetics, addressing a significant gap in the existing literature. A novel approximation method, based on the independent polynomials of the complete bipartite graph, is employed to explore solutions for substrate concentration and effectiveness factor across a spectrum of parameter values. The analytical solutions generated through the bipartite polynomial approximation method (BPAM) are rigorously tested against established methods, including the Bernoulli wavelet method (BWM), Taylor series method (TSM), Adomian decomposition method (ADM) and fourth-order Runge-Kutta method (RKM).

Findings

The study identifies two main findings. Firstly, the behaviour of dimensionless substrate concentration with distance is analysed for planar, cylindrical and spherical catalysts using both integer and fractional order Michaelis-Menten modelling. Secondly, the research investigates the variability of the dimensionless effectiveness factor with the Thiele modulus.

Research limitations/implications

The study primarily focuses on mathematical modelling and theoretical analysis, with limited experimental validation. Future research should involve more extensive experimental verification to corroborate the findings. Additionally, the study assumes ideal conditions and uniform catalyst properties, which may not fully reflect real-world complexities. Incorporating factors such as mass transfer limitations, non-uniform catalyst structures and enzyme deactivation kinetics could enhance the model’s accuracy and broaden its applicability. Furthermore, extending the analysis to include multi-enzyme systems and complex reaction networks would provide a more comprehensive understanding of biocatalytic processes.

Practical implications

The validated bipartite polynomial approximation method presents a practical tool for optimizing enzyme reactor design and operation in industrial settings. By accurately predicting substrate concentration and effectiveness factor, this approach enables efficient utilization of immobilised enzymes within porous catalysts. Implementation of these findings can lead to enhanced process efficiency, reduced operating costs and improved product yields in various biocatalytic applications such as pharmaceuticals, food processing and biofuel production. Additionally, this research fosters innovation in enzyme immobilisation techniques, offering practical insights for engineers and researchers striving to develop sustainable and economically viable bioprocesses.

Social implications

The advancement of enzyme immobilisation techniques holds promise for addressing societal challenges such as sustainable production, environmental protection and healthcare. By enabling more efficient biocatalytic processes, this research contributes to reducing industrial waste, minimizing energy consumption and enhancing access to pharmaceuticals and bio-based products. Moreover, the development of eco-friendly manufacturing practices through biocatalysis aligns with global efforts towards sustainability and mitigating climate change. The widespread adoption of these technologies can foster a more environmentally conscious society while stimulating economic growth and innovation in biotechnology and related industries.

Originality/value

This study offers a pioneering approximation method using the independent polynomials of the complete bipartite graph to investigate enzyme reaction kinetics. The comprehensive validation of this method through comparison with established solution techniques ensures its reliability and accuracy. The findings hold promise for advancing the field of biocatalysts and provide valuable insights for designing efficient enzyme reactors.

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Article
Publication date: 23 August 2011

Rajesh Chandrashekaran

This paper aims to investigate how consumers adjust their price expectations for brands in response to previously encountered prices. The effects of two distinct components of…

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Abstract

Purpose

This paper aims to investigate how consumers adjust their price expectations for brands in response to previously encountered prices. The effects of two distinct components of price history, focal and contextual, are examined. The focal component represents the role of a brand's own previous price(s) in determining future price expectations. In contrast, the contextual component represents the impact of the prices of previously considered competing brands.

Design/methodology/approach

A total of 60 subjects were enrolled to participate in a longitudinal, quantitative, survey‐based study that required them to provide information on brand perceptions, price expectations, brand consideration and choice.

Findings

Empirical comparison of several model formulations confirms that both components are crucial in explaining how consumers adjust their price expectations in response to the prices of considered brands. Consistent with a wide body of research, a brand's own previous price exerts the greatest influence on price expectations. However, the extent to which contextual prices are assimilated depends on the composition of consumers' consideration sets. Avenues for future research and implications for brand pricing and positioning are discussed.

Originality/value

The results offer several unique perspectives that stand out from (and build further on) previous research. First, although previous research has examined the effects of competing brands' current prices on brand choices, it has not incorporated the prices of competing brands that may have been observed on previous shopping occasions. Second, measures and assesses the perceived variability within the consumers' consideration sets influences the impact of the contextual component on a brand's current reference price.

Details

Journal of Product & Brand Management, vol. 20 no. 5
Type: Research Article
ISSN: 1061-0421

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Article
Publication date: 29 November 2018

V. Viswanath Shenoi, T.N. Srikantha Dath, C. Rajendran and P. Shahabudeen

The purpose of this paper is to provide strategic recommendations to supply chain managers of Indian manufacturing industries for a robust supply chain related to risk management…

854

Abstract

Purpose

The purpose of this paper is to provide strategic recommendations to supply chain managers of Indian manufacturing industries for a robust supply chain related to risk management by original equipment manufacturers (OEMs) and suppliers in manufacturing industries to ensure a robust supply chain risk management (SCRM).

Design/methodology/approach

Importance-performance analysis (IPA) is utilized to identify and provide strategic recommendations to manufacturing industries for improving their supply chain performance by attaching due importance to risk constructs and appropriately choosing mitigation strategies.

Findings

The investigation using the strategic action grids reveals that most of the means of risks are near the point of intersection of the grand means of the risk constructs and their impact on the supply chain, indicating that all the risks have the equal likelihood of occurrence. The mean importance of risk monitoring, risk avoidance (RA) and risk sharing surpass the mean performance for both OEMs and suppliers.

Research limitations/implications

The study is executed with following limitations: the study assumes that the manufacturing industries across different sectors perceive similar risk. The sectors considered are automotive, heavy engineering, general engineering and home appliances. The Southern States of India are considered because of the dominant presence of many industries, especially automotive industries. However, it should be noted that these States form the manufacturing hubs where the lead organizations are functioning along with their major suppliers.

Practical implications

By understanding the importance of SCRM dimensions and utilization of these dimensions, firms can mitigate the impact of risk on the supply chain. The detailed study of SCRM strategies highlights the importance attached to risk factors, mitigation strategies, and top management commitment. By the implementation of SCRM strategies, supply chain managers can improve the firm’s performance.

Originality/value

The study involves empirically validated data on SCRM dimensions. The IPA is performed on the SCRM dimensions to investigate the importance attached to the factors of the dimensions and their performance.

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