Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
Browse
11 results
Search Results
Item Fuzzy file management(2011) Gupta, N.; Abhinav, K.R.; Annappa, B.In this paper we discuss a fuzzy logic approach to improve file management and organization. Incorporating fuzzy techniques in the file management process provides an intelligent way of maintaining files on the computer system. The fuzzy inference engine implements the decision making process required to select files for various file operations. This provides user convenience and system efficiency. We develop a fuzzy copy command in order to integrate fuzzy logic into the UNIX system's file management procedures and present examples which demonstrate the effectiveness of the command in organizing files. © 2011 IEEE.Item Learning by creating: Interactive programming for Indian high schools(2012) Gupta, N.; Tejovanth, N.; Murthy, P.In this paper we discuss results and observations based on empirical studies of introducing programming using Scratch-Arduino to high school students. We analyse the programming experience of students across diverse educational and economic backgrounds, culture and region. Learning of key programming and electronics concepts was measured during the exercise. Results indicate that these fundamentals can be imparted at high schools in the Indian educational context. We find that the introduction of logic programming and computer-hardware interfacing at the high school level is advantageous in terms of creating an interactive environment fostering learning and creativity. © 2012 IEEE.Item Educational computing for the blind in India: Design, development and learning impact(2012) Gupta, N.; Raghavan, A.; Shanbhogue, M.; Jain, A.The aim of this paper is to present software engineering methodologies that were employed in developing educational solutions for the visually impaired. Empirical studies and experiments were conducted to measure the impact of the educational tools on the learning and cognitive abilities of the target user group. This study highlights the various technological and design challenges that were faced while developing and deploying these customized learning solutions. Observations and results indicate that there is significant merit in developing and utilizing such applications for the educational empowerment of the blind. © 2012 IEEE.Item Fuzzy sentiment analysis on microblogs for movie revenue prediction(IEEE Computer Society, 2013) Gupta, N.; Abhinav, K.R.; Annappa, B.With the advent of microblogging in recent years, people voice their views about products, especially movies. Microblogs are rich sources of data that can be analyzed to derive useful knowledge like larger public opinion on a product, which can be utilized to derive sales performance patterns. In this paper we propose a novel fuzzy approach for evaluating sentiments expressed in microblogs, which are incorporated in text mining methodologies to predict weekly movie revenues. © 2013 IEEE.Item Tensile properties of cenosphere/HDPE syntactic foams manufactured using an industrial scale injection molding technique(DEStech Publications, 2015) Kumar, B.R.B.; Doddamani, M.; Gupta, N.Composite materials having hollow fillers in a matrix material are known as syntactic foams. Such lightweight composites are used in a variety of applications ranging from sports, transportation, aviation and marine structures due to high dimensional stability, compressive strength and low moisture absorption. The present work is focused on using an industrial scale injection molding technique for fabricating syntactic foams and characterizing the fabricated syntactic foams for tensile properties. Use of such techniques can help in developing foams with high quality for bulk applications. Hollow fly ash cenospheres are used as the filler particles due to their low cost. Use of these industrial waste particles in beneficial applications can also help in their disposal. The present work is aimed at characterizing syntactic foams for tensile properties and investigating the effect of filler content. The syntactic foam density can be changed by changing cenospheres content. Cenospheres in 20 and 60 wt.% are used in syntactic foams in the present work. ASTM D 638-10 standard for the tensile properties of unreinforced and reinforced plastics is followed for the tensile testing. © © 2015 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.Item Tribological response of cenosphere/epoxy syntactic foams(DEStech Publications, 2015) Manakari, V.; Parande, G.; Bafna, K.; Doddamani, M.; Gupta, N.Fly ash cenospheres are generated in thermal power plants as waste materials. Use of these waste materials in beneficial applications is desired. The present work deals with developing syntactic foams with fly ash cenospheres filled in epoxy resin matrix. Such syntactic foams can be used as core materials in sandwich composites. The fabricated syntactic foams are evaluated for dry sliding wear behavior. Sliding velocity and filler content were the study parameters, effects of which were analyzed on wear rate. Specimens were prepared with 10, 30 and 50 wt. % cenospheres for the study. Sliding against hardened ground steel on a pin-on disc wear testing machine was conducted. The experimental results and subsequent analysis showed that the addition of cenospheres as filler material in epoxy matrix considerably increases the wear resistance of the composites. The craters on the specimen surface due to presence of cenospheres play important role in the wear process. © © 2015 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.Item Investigating the "wisdom of crowds" at scale(Association for Computing Machinery, Inc acmhelp@acm.org, 2015) Mysore, A.S.; Yaligar, V.S.; Ibarra, I.A.; Simoiu, C.; Goel, S.; Arvind, R.; Sumanth, C.; Srikantan, A.; Bhargav, H.S.; Pahadia, M.; Dobhal, T.; Ahmed, A.; Shankar, M.; Agarwal, H.; Agarwal, R.; Anirudh-Kondaveeti, S.; Arun-Gokhale, S.; Attri, A.; Chandra, A.; Chilukuri, Y.; Dharmaji, S.; Garg, D.; Gupta, N.; Gupta, P.; Jacob, G.M.; Jain, S.; Joshi, S.; Khajuria, T.; Khillan, S.; Konam, S.; Kumar-Kolla, P.; Loomba, S.; Madan, R.; Maharaja, A.; Mathur, V.; Munshi, B.; Nawazish, M.; Neehar-Kurukunda, V.; Nirmal-Gavarraju, V.; Parashar, S.; Parikh, H.; Paritala, A.; Patil, A.; Phatak, R.; Pradhan, M.; Ravichander, A.; Sangeeth, K.; Sankaranarayanan, S.; Sehgal, V.; Sheshan, A.; Shibiraj, S.; Singh, A.; Singh, A.; Sinha, P.; Soni, P.; Thomas, B.; Tuteja, L.; Varma-Dattada, K.; Venkataraman, S.; Verma, P.; Yelurwar, I.In a variety of problem domains, it has been observed that the aggregate opinions of groups are often more accurate than those of the constituent individuals, a phenomenon that has been termed the "wisdom of the crowd." Yet, perhaps surprisingly, there is still little consensus on how generally the phenomenon holds, how best to aggregate crowd judgements, and how social influence affects estimates. We investigate these questions by taking a meta wisdom of crowds approach. With a distributed team of over 100 student researchers across 17 institutions in the United States and India, we develop a large-scale online experiment to systematically study the wisdom of crowds effect for 1,000 different tasks in 50 subject domains. These tasks involve various types of knowledge (e.g., explicit knowledge, tacit knowledge, and prediction), question formats (e.g., multiple choice and point estimation), and inputs (e.g., text, audio, and video). To examine the effect of social influence, participants are randomly assigned to one of three different experiment conditions in which they see varying degrees of information on the responses of others. In this ongoing project, we are now preparing to recruit participants via Amazon's Mechanical Turk.Item Tensile behavior of compression molded glass microballoon/HDPE syntactic foams(DEStech Publications Inc. info@destechpub.com, 2016) Jayavardhan, M.L.; Bharath Kumar, B.R.; Doddamani, M.; Zeltmann, S.E.; Gupta, N.Tensile behavior of glass microballoon (GMB) reinforced high density polyethylene (HDPE) matrix syntactic foams is investigated in the present study. GMB's having true particle density 350 kg/m3 are varied in 0, 20, 40 and 60 by vol. % in HDPE matrix using brabender and subsequently compression molded to form the syntactic foam sheets. Experimental results show that the modulus increases while strength decreases with increase in microballoon content. Syntactic foams present lower fracture strain as compared to neat HDPE. For designing syntactic foam microstructures with desired properties theoretical model can be effectively utilized.Item Compressive behavior of cenosphere/hdpe syntactic foams under different strain rates(DEStech Publications Inc. info@destechpub.com, 2016) Kumar, B.R.B.; Singh, A.K.; Doddamani, M.; D Luong, D.; Gupta, N.An industrial scale injection molding machine is used to prepare fly ash cenosphere reinforced high density polyethylene (HDPE) syntactic foams. Thermosetting matrix foams with glass microspheres are being used in marine and aerospace applications owing to higher specific properties. Thermoplastic matrix syntactic foams have not been studied extensively despite interest in them for lightweight underwater vehicle structures and consumer products. Syntactic foams are fabricated with 20 and 40% cenospheres by weight. The studies on the manufacturing process suggest that a small percentage of cenospheres fracture in syntactic foams containing up to 40 wt.% cenospheres. Incorporation of particles, which are inexpensive, helps in fabricating low cost syntactic foams. Quasi-static compression tests are conducted at 10-4, 10-3 and 10-2 s-1 strain rates. The compressive strength of syntactic foams is higher than that of HDPE resin at the same strain rate due to the incorporation of ceramic particles. Yield strength shows an increasing trend with strain rate.Item Dynamic mechanical analysis of cenosphere/hdpe syntactic foams(DEStech Publications Inc. info@destechpub.com, 2016) Zeltmann, S.E.; Gupta, N.; Kumar, B.R.B.; Doddamani, M.High density polyethylene (HDPE) syntactic foams containing fly ash cenospheres as the hollow filler are fabricated using an industrial scale injection molding machine and studied for their dynamic mechanical behavior. Syntactic foams using thermoset matrix materials and engineered glass hollow particles have long been used as buoyancy devices and thermal insulation in the marine sector and as a lightweight sandwich core in the aerospace industry. This class of materials is attractive because of high mechanical properties in compression, tailorable density, and improved thermal properties. The constituents are used in as-received condition, without surface treatments. These lightweight composites can be highly beneficial in developing consumer goods by reducing consumption of HDPE. Syntactic foams are produced containing 20, 40, and 60% cenospheres by weight. A temperature sweep from 35-130°C and a frequency sweep from 1-100 Hz are conducted on the fabricated syntactic foams. At all temperatures, syntactic foams show higher storage and loss moduli and lower damping than neat HDPE. Syntactic foams with 60 wt.% cenospheres show only a small increase in properties compared to those with 40 vol.% due to particle breakage during processing. However, high particle loading has the benefit of reducing consumption of HDPE. The time-temperature superposition principle is used to extend the frequency response to cover the range 10-2-106 Hz.