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Author

Satesh Namasivayam

Other affiliations: Queen Mary University of London
Bio: Satesh Namasivayam is an academic researcher from Taylors University. The author has contributed to research in topics: Engineering education & Grand Challenges. The author has an hindex of 9, co-authored 59 publications receiving 295 citations. Previous affiliations of Satesh Namasivayam include Queen Mary University of London.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors provide an overview of the analytical approaches for the modeling of acoustic wave propagation through the natural fiber composites and the possible influential factors of fibers and grains were described for the enhancement of low frequency acoustic absorption of the composites.
Abstract: The current study is a bibliographic observation on prevailing tendencies in the development of acoustic absorption by natural fiber composites. Despite having less detrimental environmental effects and thorough availability, natural fibers are still unsuitable for wide implementation in industrial purposes. Some shortcomings such as the presence of moisture contents, thicker diameter, and lower antifungus quality hold up the progress of natural fiber composites in staying competitive with synthetic composites. The review indicates the importance of the pretreatment of fresh natural fiber to overcome these shortcomings. However, the pretreatment of natural fiber causes the removal of moisture contents which results in the decrease of its acoustic absorption performance. Incorporation of granular materials in treated fiber composite is expected to play a significant role as a replacement for moisture contents. This review aims to investigate the acoustic absorption behavior of natural fiber composites due to the incorporation of granular materials. It is intended that this review will provide an overview of the analytical approaches for the modeling of acoustic wave propagation through the natural fiber composites. The possible influential factors of fibers and grains were described in this study for the enhancement of low frequency acoustic absorption of the composites.

108 citations

Journal ArticleDOI
TL;DR: In this article, the influence of cylindrical granular materials on the acoustic absorption performance of a natural fiber composite was investigated, based on the well-known Johnson-Champoux-Allard model by varying different physical parameters.

38 citations

Journal ArticleDOI
TL;DR: In this article, a review of commercially existing microscopic traffic simulation frameworks built to evaluate real-world traffic scenario is presented, where the significant contributions made by 2D models in evaluating the lateral and longitudinal vehicle behaviour simultaneously.
Abstract: The area of traffic flow modelling and analysis that bridges civil engineering, computer science, and mathematics has gained significant momentum in the urban areas due to increasing vehicular population causing traffic congestion and accidents. Notably, the existence of mixed traffic conditions has been proven to be a significant contributor to road accidents and congestion. The interaction of vehicles takes place in both lateral and longitudinal directions, giving rise to a two-dimensional (2D) traffic behaviour. This behaviour contradicts with the traditional car-following (CF) or one-dimensional (1D) lane-based traffic flow. Existing one-dimensional CF models did the inclusion of lane changing and overtaking behaviour of the mixed traffic stream with specific alterations. However, these parameters cannot describe the continuous lateral manoeuvre of mixed traffic flow. This review focuses on all the significant contributions made by 2D models in evaluating the lateral and longitudinal vehicle behaviour simultaneously. The accommodation of vehicle heterogeneity into the car-following models (homogeneous traffic models) is discussed in detail, along with their shortcomings and research gaps. Also, the review of commercially existing microscopic traffic simulation frameworks built to evaluate real-world traffic scenario are presented. This review identified various vehicle parameters adopted by existing CF models and whether the current 2D traffic models developed from CF models effectively captured the vehicle behaviour in mixed traffic conditions. Findings of this study are outlined at the end.

32 citations

Journal ArticleDOI
TL;DR: In this article, a review of the use of additive manufacturing for acoustic panels made of agricultural waste is presented. But the authors do not discuss the use and performance of natural fibers as reinforcement in terms of mechanical properties.
Abstract: Natural fibers and their composites are being widely used in almost all the applications in this modern era. However, the properties of natural fibers have to be enhanced in order to compete with synthetic fibers. This review paper opens up additive manufacturing, as a novel method for developing an acoustic panel using natural fiber composites with enhanced mechanical and acoustical properties. This approach will help to replace synthetic-based acoustic absorbers with biodegradable composite panels in acoustic applications. This review also covers, poly(lactic acid) as a polymer matrix and its advantages, the available variety of natural fibers as reinforcement in terms of mechanical and acoustical properties. The natural fiber-based filaments used in additive manufacturing and acoustic panels made from the available natural fibers are also elaborated here. This review shows the importance of additive manufacturing and its application to develop novel acoustic panels made of agricultural waste.

30 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented experimental data for forced-convection condensation of steam on a set of five integral-fin tubes, which had identical geometry except for fin spacing, which was varied from 0.25 to 2 mm.

20 citations


Cited by
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Journal Article
TL;DR: One of the books that can be recommended for new readers is experience and education as mentioned in this paper, which is not kind of difficult book to read and can be read and understand by the new readers.
Abstract: Preparing the books to read every day is enjoyable for many people. However, there are still many people who also don't like reading. This is a problem. But, when you can support others to start reading, it will be better. One of the books that can be recommended for new readers is experience and education. This book is not kind of difficult book to read. It can be read and understand by the new readers.

5,478 citations

Reference EntryDOI
31 Oct 2001
TL;DR: The American Society for Testing and Materials (ASTM) as mentioned in this paper is an independent organization devoted to the development of standards for testing and materials, and is a member of IEEE 802.11.
Abstract: The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

3,792 citations

Journal Article
TL;DR: Arum and Roksa as mentioned in this paper argue that students gain surprisingly little from their college experience, that there is "persistent and growing inequality" in the students' learning, and that "there is notable variation both within and across institutions" so far as "measurable differences in students' educational experiences" is concerned.
Abstract: Academically Adrift: Limited Learning on College Campuses Richard Arum and Josipa Roksa University of Chicago Press, 2011 This book has much to say that is perceptive about today's undergraduate higher education in the United States. It will be valuable to review the authors' insights. At the same time, it will be as instructive to note the book's weaknesses, and especially what is omitted from the discussion. It is a discussion that is truncated intellectually by the authors' close adherence to the selective awareness that so greatly typifies the mindscape of the contemporary American "establishment" in academia and throughout the commanding heights of American society. That mindscape allows a recognition of many things, but not of others. The authors are both faculty members at major American universities. Richard Arum is a sociology professor at New York University with a tie to the university's school of education. He is the author of several books on education and director of the Education Research Program sponsored by the Social Science Research Council. His co-author, Josipa Roksa, is an assistant professor of sociology at the University of Virginia. That the book is published by the University of Chicago Press attests to its presumptive merit. Academically Adrift furnishes an example of something that has long been common in social science writing: a rather thin empirical study serving as the work's own contribution, combined with considerable additional material coming out of the literature on whatever subject is being explored. The function of the authors' own research is thus often to serve more or less as scientistic windowdressing. The reason we say the empiricism for this book is "thin" is that the "longitudinal data of 2,322 students," while seemingly ample, involves students spread over "a diverse range of campuses," including "liberal arts colleges and large research institutions, as well as a number of historically black colleges and universities and Hispanic-serving institutions," all "dispersed nationally across all four regions of the country." This must necessarily mean that the "sample" from any given institution or program was quite small. We are told that the authors didn't concern themselves with the appropriateness of each sample, but left the recruitment and retention of the sample's students to each of the respective institutions. The authors acknowledge that the study included fewer men than women, and more good students than those of "lower scholastic ability." So far as this book is concerned, however, the thinness doesn't particularly hurt the content, since so much of what is said doesn't especially depend upon anything unique found by the authors' own research. A brief summary is provided when the authors say that "we will highlight four core 'important lessons' from our research." These are that the institutions and students are "academically adrift" (which is the basis for the book's title), that students gain surprisingly little from their college experience, that there is "persistent and growing inequality" in the students' learning, and that "there is notable variation both within and across institutions" so far as "measurable differences in students' educational experiences" is concerned. Following the lead of former president Derek Bok of Harvard and of the Council for Aid to Education, the authors' ideal for higher education is that it will enhance students' "capacity for critical thinking, complex reasoning, and writing." These are the three ingredients measured by the Collegiate Learning Assessment (CLA), which the authors value most among the various assessment tools. The CLA results, they say, show that "growing numbers of students are sent to college at increasingly higher costs, but for a large proportion of them the gains in critical thinking, complex reasoning and written communication are either exceedingly small or empirically nonexistent. …

663 citations

Journal ArticleDOI
Leitao Cao1, Qiuxia Fu1, Yang Si1, Bin Ding1, Jianyong Yu1 
TL;DR: In this article, the recent progress in the design and fabrication of porous sound absorption materials is summarized and highlighted, and the review concludes with some perspectives and outlook for the porous materials.

343 citations

Journal ArticleDOI
TL;DR: An overview of the Wilson plot method along with numerous modifications introduced by researches throughout the years to improve its accuracy and to extend its use to a multitude of convective heat transfer problems is presented.

256 citations