Mahendra Gowda RV - Academia.edu (original) (raw)

Papers by Mahendra Gowda RV

Indian Journal of Fibre & Textile Research, 2002

The influence of operational factors on friction in acrylic fibres of 38 mm and 1.65 dtex has bee... more The influence of operational factors on friction in acrylic fibres of 38 mm and 1.65 dtex has been studied. The increase in normal force decreases the coefficient of friction and results in a more pronounced stick-slip effect. The values for friction indices 'a' and 'n' in the equation F=aN n are found to be 0.71 and 0.90 respectively. The sliding speed has a great influence on the smoothness of fibre movement. The stick-slip effect is more pronounced at slow sliding speeds and progressively reduces at higher speeds with the result that the difference 'μ s - μ d ' becomes smaller. The decrease in the area of contact (fringe width) decreases the coefficient of friction.

Indian Journal of Fibre & Textile Research, 2002

The influence of core filament surface structure on tensile properties of friction-spun yarns has... more The influence of core filament surface structure on tensile properties of friction-spun yarns has been studied. The yarn spun from Z pre-twist filament core has superior properties while that spun from S pre-twist filament core shows inferior quality as against the yarn spun with flat filament core. Yarns spun with air-jet textured filament core exhibit significantly lower tenacity, breaking extension, modulus and energy-to-break as compared to those made from flat and twisted forms. However, in respect of sheath contribution, the yarns spun with air-jet textured filament core perform better. The sheath contribution and sheath slipping force increase with the increase in core filament overfeed during texturing. The sheath contribution is highest for the yarn spun from filament with 30% overfeed.

Technical Textile Yarns, 2010

Abstract: This chapter deals with the advances in yarn spinning technologies, developments in yar... more Abstract: This chapter deals with the advances in yarn spinning technologies, developments in yarn properties and specific applications of various yarns. It also discusses the prominent yarn texturising technologies, innovations and technical applications of texturised yarns. Finally, it highlights the future trends in yarn spinning technologies.

Fabric Testing, 2008

Abstract: This chapter deals with key issues in testing damaged textile samples. It provides comp... more Abstract: This chapter deals with key issues in testing damaged textile samples. It provides comprehensive information on different types of damage, causes for their occurrence, stages of damage occurrence, practical significance of damage analysis, methods of damage analysis, factors affecting accurate testing, applications of textile damage analysis, and future trends.

The superabsorbent acrylic fibre (acrysorb) was spun into ring, rotor and dref-3 yarns, which wer... more The superabsorbent acrylic fibre (acrysorb) was spun into ring, rotor and dref-3 yarns, which were knitted to terry sock fabrics. The quality of these fabric samples was evaluated and compared with that of terrysock fabric knitted fro m cotton ring yarn. The acrysorb yarns performed well in knitting, with the fabrics having better appearance and handle as compared to the cotton fabric. The acrysorb terrysock fabrics gave higher water absorption, water retention, drying capability and air permeability than that of cotton fabric.

International Journal of Advanced Science and Engineering

Upon critical analysis and exploratory research it is observed that there is a significant differ... more Upon critical analysis and exploratory research it is observed that there is a significant difference between the Absolute Grading system and the Relative Grading system being introduced recently in autonomous engineering institutions. It is found that Relative Grading implemented in its present form using some software has resulted in significant reduction in the GPA of students. The reduction in Subject-wise GPA or Class-average GPA in a semester varies from 0.09 to 0.73 with an average loss of 0.42. So if similar differences are considered over a period of 8 semesters of Engineering degree, then the reduction in GPA/CGPA will range from 0.4 to 1.0, which is a huge loss to certain percentage of students. Especially, more number of average and below average students who used to score relatively lower range of marks are bound to receive relatively lower grades and hence they may end up with securing lower GPA/CGPA. Hence the authors, after thorough analysis and research, proposed a suitable Relative Grading system through normalization and computing μ±σ limits for adopting suitable class intervals of marks to allot appropriate grades. This approach minimizes the difference between the relative grades received by students as compared to those received by following the Absolute Grading system. It is further observed that there is a strong linear relationship between Grade Point and Marks.

International Journal of Advanced Science and Engineering, May 31, 2021

Education in India, especially the Engineering Education is facing a lot of disinterest and disru... more Education in India, especially the Engineering Education is facing a lot of disinterest and disruptions. Further, the onset of Covid-19 pandemic has greatly affected the quality of education and revolutionized the entire method of teaching, learning, assessment and examination system in our nation. For the last one year, there is an almost absence of face-to-face teaching, there are no proper practical classes or hands-on practice or project work either in the laboratory or in industry. Everything has turned out to be online, virtual, simulation, etc. But the efficiency and effectiveness of involving both the students and teachers in the online/virtual classes/teams is a big challenge. In such circumstances, the question about the quality of education and the graduates is a pertinent one as some industries resorted to conduct additional tests to double-check the quality of the final year students or graduates appearing in placement interviews. So many people involved in technical education, are very much concerned about the quality of engineering education. The author defines the quality of engineering education and its variation in the present context. He describes the role of Management, Governing body, Academic leadership and Faculty members in academic and overall quality of engineering education. The author strongly recommends the use of TQM principles to make the institutions to be holistic, transparent and purposeful. The paper also describes the use of ICT tools and techniques to enhance the involvement of the learners and teachers. The ICT tools and techniques will cater to a wide range of learners to learn at their own pace. The TQM principles and ICT tools are also used for the measurement and improvement of quality of online education.

International Journal of Advanced Science and Engineering, 2020

Covid-19 is a coronavirus disease set off from China in 2019 and it has spread as a pandemic thro... more Covid-19 is a coronavirus disease set off from China in 2019 and it has spread as a pandemic throughout the world, causing more than a million deaths and leaving several millions of people to struggle with acute respiratory and throat infections. It has wide-ranging effects on human health and functioning of vital parts in the body. In acute cases it affects the normal functions of the kidneys, lungs, heart, eyes and brain. This paper discusses the causes, spread and symptoms of Covid-19, and critically analyses its status in India and worldwide , and suggests preventive measures, the ways and means to fight coronavirus and eventually learn to live with this contagious virus in the event of not discovering the right vaccine. The paper also throws light on the challenges in the post-Covid era, such as human life, livelihood, health, education, economy, etc.

spun and DREF-3 Friction spun yarns has been investigated at high strain rates and different gaug... more spun and DREF-3 Friction spun yarns has been investigated at high strain rates and different gauge lengths. It is observed that the increase in gauge length from 150 mm to 500 mm decreases continually the yarn tenacity, breaking extension, but increases the breaking work and the modulus. The rotor spun yarns exhibit a minimum reduction in tenacity while the air-jet spun yarns show a greater drop in tenacity and breaking extension when tested at longer gauge lengths. Amongst all yarns, the ring spun yarns exhibit highest tenacity and modulus followed by rotor spun yarns and air-jet spun yarns. The yarn tenacity, breaking extension, breaking work and breaking time are found to be power law functions of gauge length while the modulus is preferably a logarithmic function of gauge length. The percentage increase in tenacity is higher in case of 20 Ne cotton ring spun yarn followed by the corresponding rotor spun and airjet spun yarns. All these observations ascribe to the nature of the r...

Indian Journal of Fibre & Textile Research, 2003

Ring-spun yarns of different counts and fibrous materials have been studied for irregularity and ... more Ring-spun yarns of different counts and fibrous materials have been studied for irregularity and imperfections. The irregularity-length equations have been developed using five different cut lengths (10, 100, 1000, 10000,and 100000 mm) to deduce irregularity-length indices (m and a). The values of 'm' and 'a' for all the yarns are found to be -0.25 and 22.5-29.7 respectively. The irregularity is found to be correlated highly, fairly and poorly with thin places (-30%), thick places (+50%) and neps (+200%) respectively for various yams studied.

Trevira CS fabrics are treated with various antimicrobial agents viz., Eucalyptus Oil, Sanitized ... more Trevira CS fabrics are treated with various antimicrobial agents viz., Eucalyptus Oil, Sanitized (T-99), Neem activated charcoal and Bamboo activated charcoal in order to study their antimicrobial finishing effect on flame-retardant properties. The fabric samples have been tested for its bactericidal activity using Nutrient Agar Diffusion Test method. It is found that Trevira CS fabrics treated with Eucalyptus Oil, Neem and Bamboo activated charcoals exhibit good antimicrobial resistance against E.coli, B.subtilis and S.aureus. The Trevira CS fabric treated with Sanitized (T-99) exhibits highest zone of inhibition as compared to other antimicrobial agent treated fabrics.

This paper reports study on the development and characterization of baby diapers made from four d... more This paper reports study on the development and characterization of baby diapers made from four different fibrous compositions, namely pure bamboo, pure organic cotton, bamboo/organic cotton (70/30), and bamboo/organic cotton (50/50). Antibacterial activity tests have been carried out on baby diapers against S aureus and E coli. Superabsorbent polymer sodium polyacrylate has been incorporated into the diapers to enhance their absorption capacity. Various tests such as product density, thickness, absorption capacity, liquid strikethrough, acquisition time under load and diaper rewet under load have been carried out to study the performance of the diapers. It is found that the diaper made from bamboo/organic cotton (70/30) exhibits best performance.

This article deals the fabrics of different blend proportions ie. polyester/cotton were prepared ... more This article deals the fabrics of different blend proportions ie. polyester/cotton were prepared with different woven structures like plain, twill, satin. These fabrics were treated with fabric softener like silicone. After all the above trials the seam strength and seam slippage were studied for both finished and unfinished materials. The seam strength and seam slippage were studied using instron tensile strength tester, the studies were performed at 6.0mm breaking load and it was observed that the breaking load of unfinished samples were depicting higher strength than the finished without seam opening. The fabric samples of plain weave were found to have greater seam performance than the twill and satin. Various other factors influencing the seam strength and seam slippage are also discussed in detail

Basofil ® fiber exhibits excellent fire protection and thermal stability along with resistance to... more Basofil ® fiber exhibits excellent fire protection and thermal stability along with resistance to chemical, hydrolysis and ultraviolet radiation. Open-end spun yarns were produced from Basofil® fiber and its blends, the necessary tensile properties were tested. 100% Basofil ® yarns show less tenacity and breaking elongation due to fiber density, brittleness, and lower cohesion between fibers. Flammability characteristics of Basofil ® fiber have enhanced in its blends. The compression and shear properties of the above mentioned fabric samples exhibit very high thermal dimensional stability. This study helps the yarn and fabric manufacturer to engineer the structures suitable for the development of Defence apparels, civilian apparels and Home furnishings. *CorrespondenceMurugesan mbharan79@gmail.com

In the present work, the quality of fabric samples was controlled, now the garment longevity depe... more In the present work, the quality of fabric samples was controlled, now the garment longevity depends on the seam parameters like various factors such as seam strength, seam slippage, seam puckering and yarn severance. In the present work, fabrics of different blend proportions ie., cotton and was prepared with different woven structures like plain, twill, satin. These fabrics were treated with fabric softener like silicone. After all the above trials the seam strength and seam slippage were studied for both finished and unfinished materials. The seam strength and seam slippage were studied using instron tensile strength tester, the studies were performed at 6.0mm breaking load and it was observed that the breaking load of unfinished samples were depicting higher strength than the finished without seam opening. The fabric samples of plain weave were found to have greater seam performance than the twill and satin. Various other factors influencing the seam strength and seam slippage a...

The tensile behavior of Ring spun, Rotor spun, Air-jet spun and DREF-3 Friction spun yarns has be... more The tensile behavior of Ring spun, Rotor spun, Air-jet spun and DREF-3 Friction spun yarns has been investigated at high strain rates and different gauge lengths. It is observed that the increase in gauge length from 150 mm to 500 mm decreases continually the yarn tenacity, breaking extension, but increases the breaking work and the modulus. The rotor spun yarns exhibit a minimum reduction in tenacity while the air-jet spun yarns show a greater drop in tenacity and breaking extension when tested at longer gauge lengths. Amongst all yarns, the ring spun yarns exhibit highest tenacity and modulus followed by rotor spun yarns and air-jet spun yarns. The yarn tenacity, breaking extension, breaking work and breaking time are found to be power law functions of gauge length while the modulus is preferably a logarithmic function of gauge length. The percentage increase in tenacity is higher in case of 20 Ne cotton ring spun yarn followed by the corresponding rotor spun and air-jet spun yarn...

The tensile behaviour of Ring spun, Rotor spun, Air-jet spun and DREF-3 Friction spun yarns has b... more The tensile behaviour of Ring spun, Rotor spun, Air-jet spun and DREF-3 Friction spun yarns has been investigated at high strain rates and different gauge lengths. It is observed that the increase in gauge length from 150 mm to 500 mm decreases continually the yarn tenacity, breaking extension, but increases the breaking work and the modulus. The rotor spun yarns exhibit a minimum reduction in tenacity while the air-jet spun yarns show a greater drop in tenacity and breaking extension when tested at longer gauge lengths. Amongst all yarns, the ring spun yarns exhibit highest tenacity and modulus followed by rotor spun yarns and air-jet spun yarns. The yarn tenacity, breaking extension, breaking work and breaking time are found to be power law functions of gauge length while the modulus is preferably a logarithmic function of gauge length. The percentage increase in tenacity is higher in case of 20 Ne cotton ring spun yarn followed by the corresponding rotor spun and airjet spun yarn...

Journal of Textile Science & Engineering, 2012

Indian Journal of Fibre & …, 2010

International Journal of Advanced Science and Engineering

In the context of education, Accreditation and Ranking are measures of overall quality of an educ... more In the context of education, Accreditation and Ranking are measures of overall quality of an educational Programme and Institution. Both are assessments of the totality of various quality parameters of education including the input quality and quantity, innovative process and performance, continuous improvement, institutional support, governance and output quality in terms of students’ performance, graduate outcomes, inclusivity, perception, etc. Since Accreditation and Ranking are measures of the overall performance and total quality of an educational programme or institution, the scores obtained for all criteria/metrics/parameters are cumulated to compute the total marks, grade or rank as the case may be. Nevertheless, there is a discernible difference between Accreditation and Ranking in terms of the specific criteria or metrics used, weightages assigned, assessment methodology employed, and description of the outcome. Accreditation and Ranking are described by three important measures namely NBA accreditation, NAAC accreditation and NIRF ranking. NBA accreditation is a measure of the degree of excellence of a Programme, whereas NAAC accreditation and NIRF ranking are measures of the degree of excellence of an Institution. All the three measures are unique and not competitors to each other but together they provide multiple benefits to the Institutions. Hence, it is desirable that all Tier I, Tier II and other institutions aspire to achieve all the three distinct measures, step by step sequentially, in order to continuously improve the quality for achieving fame and recognition at national level.

Indian Journal of Fibre & Textile Research, 2002

Technical Textile Yarns, 2010

Fabric Testing, 2008

International Journal of Advanced Science and Engineering

International Journal of Advanced Science and Engineering, May 31, 2021

International Journal of Advanced Science and Engineering, 2020

Indian Journal of Fibre & Textile Research, 2003

Journal of Textile Science & Engineering, 2012

Indian Journal of Fibre & …, 2010

International Journal of Advanced Science and Engineering