Time filter

Source Type

Yadav M.,Allahabad University | Srivastav A.,Ldc Institute Of Technical Studies | Verma S.K.,Allahabad University | Behari K.,Allahabad University
Carbohydrate Polymers | Year: 2013

The aim of the paper is to study the physico-chemical phenomenon of synthesized graft copolymer (carboxymethylated guar gum-g-vinylsulfonic acid). The reaction optimum conditions for grafting has also been determined by studying the effect of vinylsulfonic acid, hydrogen ion, peroxymonosulphate, glycolic acid concentration and carboxymethylated guar gum along with time and temperature. Experimental results show that maximum grafting has been obtained at 1.8 g dm-3 concentration of partially carboxymethylated guar gum and 5.3 × 10-2 mol dm-3 concentration of vinylsulfonic acid. It has been observed that grafting ratio, add on, conversion, efficiency increase up to 4.0 × 10-3 mol dm-3 of hydrogen ion, 4 × 10-3 mol dm-3 of glycolic acid, 14 × 10-3 mol dm-3 of peroxymonosulphate and 35 ?C of temperature. Grafted copolymer has been characterized by FTIR spectroscopy and thermogravimetric analysis. Water swelling, flocculating, metal ion uptake and resistance to biodegradability properties of partially carboxymethylated guar gum-g-vinylsulfonic acid have been determined. © 2013 Elsevier Ltd. All rights reserved. Source

Khare A.,Ldc Institute Of Technical Studies
International Journal of Services and Operations Management | Year: 2011

The research attempts to understand the Indian customers' perceptions towards the service quality of multinational banks. There have been several studies to understand the service quality in the banking sector. With liberalisation policies initiated by the Indian Government, the multinational banks have been making investments in the country. To be successful in the country, they would have to understand the expectations of the Indian customers. The study tries to extend the existing SERVQUAL dimensions used by previous researches and adopts it in Indian context. The SERVQUAL model was adopted and modified for the research. Through a survey administered on Indian customers (n = 198), and their perceptions about service quality was identified. ANOVA, post-hoc analysis and, multiple regression tests were used to analyse the data. The results show that Indian customers' quality perceptions differ between the two genders and across age categories. The multinational banks can use the results for planning their expansion and marketing strategies in Indian subcontinent. © 2011 Inderscience Enterprises Ltd. Source

Khare A.,Campus Management | Mishra A.,Ldc Institute Of Technical Studies | Singh A.B.,Ldc Institute Of Technical Studies
International Journal of Services and Operations Management | Year: 2012

The purpose of this research was to understand the Indian customers' attitude towards convenience and trust in financial transactions in internet banking services. The findings suggest that convenience and trust are important in use of internet banking. Indian customers' use of internet banking is dependent on convenience attributes. The younger customers are likely to find internet banking convenient. Men and women differ in their attitude towards preference to use internet banking. The customers' fears can be addressed by banks and promotions can be devised to assure the customers about the security aspects of internet banking/transactions. There is limited research to study the trust factor in financial transactions through internet banking among Indian customers. Indian customers' attitude and fears towards hacking and frauds in internet banking have not been examined. Copyright © 2012 Inderscience Enterprises Ltd. Source

Pande T.,Ldc Institute Of Technical Studies | Shukla M.,Uttar Pradesh Technical University | Tripathi P.,Uttar Pradesh Technical University | Singh A.,Indian Institute of Information Technology Allahabad
Advances in Intelligent Systems and Computing | Year: 2014

Underwater communication finds numerous application including oceanographic data collection, pollution, monitoring, offshore exploration, disaster prevention, assisted navigation, tactical, surveillance, and mine reconnaissance. The enabling technology for these applications is acoustic wireless networking. A major challenge for the deployment of UW-ASN is the development of a multipleaccess technique and modulation technique tailored for the underwater environment. Typical frequency ranges from 1 Hz to 1 MHz resulting in low data rates. The ever-increasing demand of short- and long-distance communication is leading to further research in the field of underwater communication. In this paper, performance analysis has been done for underwater acoustic (UWA) communication with IDMA scheme using BPSK modulation techniques. fThe simulated system is subjected to additive white Gaussian noise (AWGN) in the channel in uncoded environment using random interleavers in MATLAB environment. © Springer India 2014. Source

Srivastava A.,Ldc Institute Of Technical Studies | Mishra D.K.,Allahabad University | Behari K.,Allahabad University
Carbohydrate Polymers | Year: 2010

The optimum conditions for maximum grafting have been determined by varying the concentrations of N-vinyl-2-pyrrolidone, hydrogen ion, potassium bromate, silver nitrate, chitosan along with time and temperature. The grafting ratio increased on increasing N-vinyl-2-pyrrolidone concentration and reaches maximum value at 20 × 10-2 mol dm-3. Similarly, the concentration of hydrogen ion increases, the grafting parameters increase and attain maximum value at 1.8 × 10-2 mol dm-3. The grafting parameters increase continuously on increasing the concentration of potassium bromate from 2 × 10-3 mol dm-3 to 10 × 10-3 mol dm-3. On increasing silver nitrate concentration from 0.4 × 10-2 to 3.6 × 10-2 mol dm-3, grafting ratio is found to be maximum at 2.8 × 10-2 mol dm-3. The grafting parameters decrease continuously on increasing the concentration of chitosan. An attempt has been made to study some of the physicochemical properties in terms of swelling, metal ion sorption and flocculation. The chitosan and chitosan-g-N-vinyl-2-pyrrolidone were characterized by infrared spectroscopy and thermogravimetric analysis. © 2009 Elsevier Ltd. All rights reserved. Source

Discover hidden collaborations