S. Aravind Raj

Bio: S. Aravind Raj is an academic researcher from VIT University. The author has contributed to research in topics: Medicine & Ultimate tensile strength. The author has an hindex of 5, co-authored 22 publications receiving 120 citations. Previous affiliations of S. Aravind Raj include National Institute of Technology, Tiruchirappalli.

A mathematical model to evaluate the role of agility enablers and criteria in a manufacturing environment

Abstract: Modern manufacturing arena necessitates the need for responsiveness by practicing agile manufacturing (AM) principles. AM imposes the transformation of the manufacturing organisation so as to respond to dynamic market changes. This article focuses towards the application of graph theory (GT) for conceptual modelling the agile system and to compute the dependencies among the individual agile enabler, criteria and attributes as a top-down approach. Using GT approach, digraphs were systematically constructed for agile enablers and variable permanent matrix values were computed for different scenarios and the relative importance of agility enablers were determined. The permanent values of ‘Management responsibility’ enabler and technology enabler are found to be 920 (minimum) and 3529 × 1014, respectively for the existing situation, whereas for the practically base case situation, it was found to be 1185 (minimum) and 5081.17 × 1014 (maximum), respectively. The Comprehensive Agility Index was found to be 1.39...

A review on metal additive manufacturing for intricately shaped aerospace components

Abstract: Additive manufacturing (AM) is one of the fastest-growing industrial techniques, bringing many innovative solutions to different manufacturing problems. In AM, a sliced image of the 3D model is layered together to make a 3D object. The main reason for the exponential growth of AM is its numerous advantages over conventional methods, such as high-cost efficiency, less material wastage, a very high degree of freedom, and lesser material constraints. One of the biggest contributors to this growth is the aerospace industry. It is due to the ease of making complex structures and alloys with a very high strength-to-weight ratio (S:W). The authors have comprehensively reviewed the use of AM in the aerospace industry in this review. This review mainly focuses on the metal AM of complex components used in the Aerospace industry. The other topics in this review are an in-depth study of the different AM techniques, a classification of different AM processes, a comparison between conventional and AM techniques, an advantage of AM techniques, and the future scope of AM techniques. The material characterization and microstructure of the components and the different process parameters concerning the cost and irrespective of cost are also briefly discussed.

Chitosan: A Sustainable Material for Multifarious Applications

Abstract: Due to the versatility of its features and capabilities, chitosan generated from marine crustacean waste is gaining importance and appeal in a wide variety of applications. It was initially used in pharmaceutical and medical applications due to its antibacterial, biocompatible, and biodegradable properties. However, as the demand for innovative materials with environmentally benign properties has increased, the application range of chitosan has expanded, and it is now used in a variety of everyday applications. The most exciting aspect of the chitosan is its bactericidal properties against pathogens, which are prevalent in contaminated water and cause a variety of human ailments. Apart from antimicrobial and water filtration applications, chitosan is used in dentistry, in water filtration membranes to remove metal ions and some heavy metals from industrial effluents, in microbial fuel cell membranes, and in agriculture to maintain moisture in fruits and leaves. It is also used in skin care products and cosmetics as a moisturizer, in conjunction with fertilizer to boost plant immunity, and as a bi-adhesive for bonding woods and metals. As it has the capacity to increase the life span of food items and raw meat, it is an unavoidable component in food packing and preservation. The numerous applications of chitosan are reviewed in this brief study, as well as the approaches used to incorporate chitosan alongside traditional materials and its effect on the outputs.

Industry 4.0: tools and implementation

Abstract: Received: 19 April 2019 Abstract Accepted: 14 August 2019 With the increasing demand of customisation and high-quality products, it is necessary for the industries to digitize the processes. Introduction of computers and Internet of things (IoT) devices, the processes are getting evolved and real time monitoring is got easier. With better monitoring of the processes, accurate results are being produced and accurate losses are being identified which in turn helps increasing the productivity. This introduction of computers and interaction as machines and computers is the latest industrial revolution known as Industry 4.0, where the organisation has the total control over the entire value chain of the life cycle of products. But it still remains a mere idea but an achievable one where IoT, big data, smart manufacturing and cloud-based manufacturing plays an important role. The difference between 3rd industrial revolution and 4th industrial revolution is that, Industry 4.0 also integrates human in the manufacturing process. The paper discusses about the different ways to implement the concept and the tools to be used to do the same.

Philosophical Transactions of the Royal Society of London. for the Year Mdcccxxvii. Part I. Volume Cxvii:355–388, 1827

Abstract: Follow up what we will offer in this article about philosophical transactions of the royal society of london series b biological sciences no 600 vol 233 studies of the post glacial history of british vegetation x correlation between climate forest composition prehistoric agriculture and peat st. You know really that this book is coming as the best seller book today. So, when you are really a good reader or you're fans of the author, it does will be funny if you don't have this book. It means that you have to get this book. For you who are starting to learn about something new and feel curious about this book, it's easy then. Just get this book and feel how this book will give you more exciting lessons.

Digitalization of the EU Economies and People at Risk of Poverty or Social Exclusion

Abstract: Despite the fact that a comprehensive analysis of digitalization processes in the EU member states has been carried out, the impact of a country’s digitalization level on the risks of poverty and social exclusion requires further investigation The purpose of the paper is to verify a hypothesis that a higher level of national digitalization provides positive trends in reducing the risks of poverty and social exclusion for the population The Digital Economy and Society Index (DESI) was used to evaluate the digitalization levels of the EU countries The indicator “People at risk of poverty or social exclusion” (AROPE) was applied to estimate the poverty level As the main research methods, the authors used a comparative and correlation analysis with respect to the above-mentioned indicators, as well as the Monte Carlo method in order to evaluate the probability of a change in the indicator “population at risk of poverty or social exclusion” in 2021 The EU countries with higher digitalization levels have a lower percentage of the population at risk of poverty and social exclusion However, a higher digitalization level of the EU member states does not provide an accelerated risk reduction of poverty and social exclusion Statistical calculations with respect to the entire population of these countries mainly indicate reverse processes At the same time, a further reduction of poverty and social exclusion level is less probable in the countries with a higher level of digitalization For relatively poor segments of the population (the 1st and 2nd quintiles by income) in the EU member states, the level of digitalization does not play a significant role For relatively wealthy segments of the population (the 3rd and 4th quintiles by income) the authors noticed a pattern: the higher the level of digitalization is, the lower the risk of poverty and social exclusion becomes A pairwise comparison of countries with initially similar AROPE values showed that in most cases (3 out of 5), the countries with higher levels of digitalization showed a more significant reduction in poverty and social exclusion However, the probability of further positive changes in this area is higher for the countries with a lower level of digitalization

Carbon nanotube-based adsorbents for the removal of dyes from waters: A review

Abstract: Contamination of water is calling for new techniques to provide safe and clean water for drinking and other usages. Among existing techniques of wastewater treatment, adsorption is one of the most efficient methods. Recently, carbon nanotube-based adsorbents are attracting research and industrial attention due to their large surface area, cylindrical hollow structure and well-flourished mesopores. Raw carbon nanotubes can be modified and adapted to the intended applications and targeted pollutants. Here we review the efficacy of unmodified and modified carbon nanotubes for the removal of dyes from wastewater. Reports show that chemical modification leads to an improvement of the adsorption capacity. The adsorption of dyes on carbon nanotubes depends on the nature of the adsorbent and adsorbate. Adsorption mechanisms involve van der Waals forces, π–π stacking, hydrophobic interactions, hydrogen bonding and electrostatic interactions. Nonetheless, hydrophobicity and cost actually restrict practical applications.

Agile manufacturing: framework and its empirical validation

Abstract: The agile manufacturing is one of the operational strategies which organizations have adopted to beat environmental uncertainties resulting from worldwide economic recession, shortening of product life cycle, supplier constraints and obsolete technologies. In our study, we have adopted literature review to develop agile manufacturing (AM) framework. Our framework has six constructs that includes technologies, empowerment of workforce, customer focus, supplier relationship management, flexible manufacturing systems and organizational culture. To test our framework, we developed our instrument scientifically and collected data using Dillman’s (2007) total design test methods. We further performed a nonresponse bias test and then we checked the assumptions of constant variance, outliers and normality. Once we found that our dataset skewness and kurtosis values are within the defined range, we further performed a confirmatory factor analysis (CFA) test to check the validity of our constructs. Our multivariate statistical analyses suggest that our proposed framework constructs are valid. The goodness-of-fit indices suggest that our framework is a good fit. Once the model was tested, conclusion, limitations and further directions of our study were outlined.