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Amutha, R.
- Studies on Multidrug Resistant Pseudomonas Aeruginosa from Pediatric Population with Special Reference to Extended Spectrum Beta Lactamase
Abstract Views :407 |
PDF Views:109
Authors
Affiliations
1 Department of Biotechnology, VELS University, Pallavaram, Chennai-600117, IN
2 Department of Microbiology, Dr ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai -600 113, IN
3 Department of Microbiology, SRM college of Arts and Science,Kattankulathur-603203, Tamilnadu, IN
1 Department of Biotechnology, VELS University, Pallavaram, Chennai-600117, IN
2 Department of Microbiology, Dr ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai -600 113, IN
3 Department of Microbiology, SRM college of Arts and Science,Kattankulathur-603203, Tamilnadu, IN
Source
Indian Journal of Science and Technology, Vol 2, No 11 (2009), Pagination: 11-13Abstract
A total of 53 isolates of Pseudomonas aeruginosa were obtained from 250 clinical samples from pediatric populations in Chennai. The isolates were obtained from clinical specimens viz. the throat swab, ear swab and urine sample. The isolates of P. aeruginosa were subjected to antibiotic sensitivity test. Among various antibiotics tested, the strains showed highest resistance to ampicillin (85%), followed by amikacin (62.2%), norfloxacin (60.3%) and ciprofloxacin (50.9%). The data on ESBL production indicated overall production of 25% among MDR strains. MIC values for the antibiotics ranged from 3.9 μg/ml to 256µg/ml. These data suggest that the prevalence of ESBLs which are very important as these strains may often cause outbreaks in the pediatric population and causes increased morbidity and mortality in patients underlying diseases or limit therapeutic options due to the high degree of multidrug resistance.Keywords
Multidrug Resistant, Pseudomonas Aeruginosa, ESBL, MIC, IndiaFull Text
References
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- Nordmann P and Naas T (1994) Sequence analysis of PER-1 extended spectrum beta-lactamase from Pseudomonas aeruginosa and comparison with class A beta lactamase. Antimicro Agents Chemotheraphy. 38,104-114.
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- Poirel L, Weldhagen GF, De Champs C and Nordmann P (2002) A nosocomial outbreak of Pseudomonas aeruginosa isolates expressing the extended spectrum beta-lactamase GES-2 in South Africa. J. Antimicrobial.Chemotheraphy. 49, 561-565.
- Poirel L, Le Thomas I, Naas T, Karim A and Nordmann P (2000) Biochemical sequence analysis of GES-1, a novel class A extended-spectrum betalactamase and the class 1 integron In52 from Klebsiella pneumonia. Antimicrob. Agents Chemotherapy. 44, 622-632.
- Subha A and Ananthan S (2002) Extended spectrum β-lactamase mediated resistance to third generation cephalosporins among Klebsiella pneumoniae in Chennai. Indian J. Med. Microbiol. 20, 92-95.
- Veenu Gupta, Rama Sehgal and Arora DR (2002) Mic values of antimicrobial agents against non-fermenting gram negative bacilli. 97 (12), 458-459.
- Analysis of PAPR Reduction Techniques in OFDM System
Abstract Views :203 |
PDF Views:5
Authors
M. R. Sharmila
1,
R. Amutha
1
Affiliations
1 Department of ECE, SSN College of Engineering, Chennai, IN
1 Department of ECE, SSN College of Engineering, Chennai, IN
Source
Wireless Communication, Vol 4, No 12 (2012), Pagination: 661-667Abstract
Multicarrier modulations like Orthogonal Frequency Division Multiplexing (OFDM) suffer from large Peak-to-Average-Power Ratio (PAPR) which cause challenges to the RF front-end. Large fluctuations of OFDM signal amplitude represents a major drawback for amplification in mobile communication systems. Large peak power leads to inefficient use of High Power Amplifiers (HPAs) or decreases the system performance. There are various techniques to reduce the PAPR in OFDM system. Among these techniques, in this paper, Active Constellation Extension (ACE) and Partial Transmit Sequence (PTS) are considered and new algorithm has been proposed to improve the PAPR reduction performance of these existing techniques. Simulation results demonstrate that the proposed algorithms give better PAPR reduction when compared with the conventional techniques in terms of Complementary Cumulative Distribution Function (CCDF).Keywords
PAPR, OFDM, Adaptive ACE, Complementary Cumulative Distribution Function (CCDF), CB-ACE, Partial Transmit Sequence (PTS), Tabu Search (TS), Parallel Tabu Search.
- Memory Efficient Image Compression Scheme for Multimedia Sensor Networks
Abstract Views :133 |
PDF Views:3
Authors
Affiliations
1 Department of ECE, SSN College of Engineering, Chennai, IN
1 Department of ECE, SSN College of Engineering, Chennai, IN
Source
Digital Image Processing, Vol 4, No 12 (2012), Pagination: 650-655Abstract
Image transmission in multimedia sensor network is a major challenge which raises issues related to its representation, storage and transmission. Image transmission over the network consume too much of energy and bandwidth. The computational and memory resources of wireless sensor nodes are typically very limited. These limitations prevent the application of modern signal processing techniques to preprocess the collected sensor data for energy and bandwidth efficient transmission over sensor networks. Image compression is one such technology that has been developed to reduce image size and used by Wireless Sensor Networks (WSN) applications. The original DCT transform algorithm and existing wavelet-based picture compression system is too complicated to be applied in the sensor node. In this paper, we describe a line-based DWT and Integer DCT based image compression algorithm particularly suited to the reduced storage and computational resources of a WSN node. The experimental result shows that the DCT transform is better than the DWT in terms of image quality but the DWT outperforms DCT in terms of memory space used.Keywords
Image Sensor, Sensor Node, Image Coding, Wireless Sensor Networks, DCT, DWT.- Binary LBT based Energy Efficient Image Compression for WSN
Abstract Views :151 |
PDF Views:4
Authors
Affiliations
1 Department of ECE, SSN College of Engineering, Chennai, IN
1 Department of ECE, SSN College of Engineering, Chennai, IN
Source
Digital Image Processing, Vol 4, No 12 (2012), Pagination: 656-660Abstract
A wireless sensor network (WSN) is a wireless network that consists of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions. One of the major challenge in enabling image transfer service in resource constrained WSN is, it need to process and wirelessly transmit very large volume of data. This will impose severe demands on the battery resources as well as the bandwidth of the wireless sensor network. To minimize the resource constraints in WSN, Binary Lapped Biorthogonal Transform (Binary LBT) based low complexity and low memory image compression algorithm with Modified Golomb Rice code is implemented. DCT used in Binary LBT is computed using only shifting and addition operation because conventional DCT is computed using floating point multiplication, whereas floating point multiplication in hardware implementation consume more power. Binary LBT minimize the blocking artifacts in Discrete Cosine Transform (at low bit rate) and reduce the computational complexity in Discrete Wavelet Transform (DWT) considerably. The proposed Modified Golomb Rice code reduces the number of bits required to represent an image on an average of 10% when compared to Golomb Rice code.Keywords
Binary Lapped Biorthogonal Transform (Binary LBT), Modified Golomb Rice codes (MGRC), Zerotree Coding (ZTC), Low Complexity and Low Memory Entropy Coder (LLEC), Binary Discrete Cosine Transform (Binary DCT).- Kigelia africana Fruit Carbon as a Low Cost Adsorbent for Removal of Copper(II) Ions from Aqueous Solution
Abstract Views :322 |
PDF Views:0
Authors
Affiliations
1 Department of Applied Sciences, PEC University of Technology, Chandigarh-160 012, IN
1 Department of Applied Sciences, PEC University of Technology, Chandigarh-160 012, IN
Source
Nature Environment and Pollution Technology, Vol 10, No 3 (2011), Pagination: 419-422Abstract
Fruit of Kigelia africana tree is cylindrical and weigh approximately 2.5 kg. A mature tree produces hundreds of fruits every year but not used for any purpose, and hence a waste material in this region. Heating dried fruit powder with 1:1 sulphuric acid at 110°C for 24 h has resulted in carbonaceous material which showed marked adsorption properties. Copper(II) adsorption capacity of this Kigelia africana fruit powder carbon material (KAFP) was found to be 21.74 mg/L and almost 90% removal was achieved by treating 100 mg of adsorbent material in 100 mL (10 mg/L) of Cu(II) solution. Adsorption data fitted well into Langmuir adsorption isotherm equation. Metal uptake was maximum at pH 7 and almost negligible at much lower pH values.Keywords
Kigelia africana Fruit Carbon, Copper Adsorption, Langmuir Adsorption, Isotherm.Full Text
- Utilization of Melia azedarach Fruit Based Adsorbents for the Removal of Heavy Metal Ions from Waste Water
Abstract Views :191 |
PDF Views:0
Authors
Affiliations
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
2 Biopharmaceutics and Pharmaceutical Microbiology, Nnamdi Azikiwe University, Awka, PMB 5025, Awka, Anambra State, NG
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
2 Biopharmaceutics and Pharmaceutical Microbiology, Nnamdi Azikiwe University, Awka, PMB 5025, Awka, Anambra State, NG
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1772-1776Abstract
Utilization of Melia azedarach fruit based adsorbents for the removal of heavy metals like Cu (II), Ni (II) was considered. The effect of base treatment on the adsorbent behaviour was also studied. Batch adsorption studies were conducted as a function of solution concentration, adsorbent dose, and contact time at pH 5. Equilibrium adsorption data were fitted to regressed form of Langmuir, Frendlich and Temkin isotherm equations. At room temperature, 100 mg of Melia azedarach adsorbent removed about 95% of Cu (II) ions from the aqueous solution in the concentration range of 10-25ppm. While, 69% to 86% of Ni (II) ions were removed by MA adsorbent under same conditions. Slight increase in metal ions uptake was observed in the case of base treated MA adsorbents. Equilibrium adsorption data for Cu(II) and Ni(II) fitted well in to Freundlich adsorption isotherm.
Keywords
Melia azedarach, Adsorption, Freundlich Isotherm and Pest Free Treated Water.- Influence of Acid Treatments of Sugarcane Bagasse Carbon Sample on the Adsorption of CU (II) and PB (II) Ions from Aqueous Solution
Abstract Views :204 |
PDF Views:0
Authors
Affiliations
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1678-1684Abstract
Sugar carbon was prepared from sugarcane bagasse by carbonization with conc. H2SO4. Yield was about 20% by weight. The surface of the original unmodified sugar carbon (UM-carbon) was modified by treatment with 2M HCl (SM-A carbon), 2M NaOH (SM-B carbon) and 50% (v/v) HNO3 (SM-O carbon). Carbon samples were characterized by SEM, FTIR and XRD techniques. Lead and copper adsorption on unmodified and modified sugar carbons from aqueous solution at room temperature (25°C) was studied by batch analysis method. The solution pH was maintained at 5. Nitric acid oxidation of the original sugar carbon increased metal uptake by almost 100% and simple HCl treatment enhanced metal adsorption by about 10%. Adsorption data of both metals fit well in Freundlich adsorption isotherm equation. Lead (II) ions were adsorbed almost in double amounts of copper (II) ions confirming that pore accumulation takes place in addition to ionic interactions in solution.
Keywords
Sugarcane Bagasse, Surface Treatments, Pb and Cu Adsorption, Adsorption Isotherms.- Real Time and Energy Efficient Transport Protocol for Wireless Sensor Networks
Abstract Views :118 |
PDF Views:0
Authors
Affiliations
1 Sathyabama University, Chennai-600119, IN
2 Department of Electronics and Communication Engineering, Sri Venkateswara College of Engineering, Sriperumbudhar-602105, IN
1 Sathyabama University, Chennai-600119, IN
2 Department of Electronics and Communication Engineering, Sri Venkateswara College of Engineering, Sriperumbudhar-602105, IN
Source
International Journal of Advanced Networking and Applications, Vol 1, No 1 (2009), Pagination: 40-44Abstract
Reliable transport protocols such as TCP are tuned to perform well in traditional networks where packet losses occur mostly because of congestion. Many applications of wireless sensor networks are useful only when connected to an external network. Previous research on transport layer protocols for sensor networks has focused on designing protocols specifically targeted for sensor networks. The deployment of TCP/IP in sensor networks would, however, enable direct connection between the sensor network and external TCP/IP networks. In this paper we focus on the performance of TCP in the context of wireless sensor networks. TCP is known to exhibit poor performance in wireless environments, both in terms of throughput and energy efficiency. To overcome these problems we introduce a mechanism called TCP Segment Caching .We show by simulation that TCP Segment Caching significantly improves TCP Performance so that TCP can be useful even in wireless sensor.Keywords
Energy Efficiency, Transport Protocol, Wireless Sensor Network.Full Text
- Social Network and Sentiment Analysis on Twitter
Abstract Views :155 |
PDF Views:2
Authors
R. Amutha
1,
D. Vimal Kumar
2
Affiliations
1 Department of Computer Science, Nehru Arts & Science College, Thirumalayampalayam, Coimbatore- 05, IN
2 Department of Computer Science, Nehru Arts & Science College, Thirumalayampalayam, Coimbatore- 05, IN
1 Department of Computer Science, Nehru Arts & Science College, Thirumalayampalayam, Coimbatore- 05, IN
2 Department of Computer Science, Nehru Arts & Science College, Thirumalayampalayam, Coimbatore- 05, IN
Source
Software Engineering, Vol 10, No 1 (2018), Pagination: 3-5Abstract
The growth of web technology produces huge volumes of data in the web. Internet provides a platform for sharing opinions & sharing ideas. Social networking sites are rapidly gaining popularity as they allow people to discuss with different communities and post messages across the world. Twitter is the most widely used site where people can share their reviews in the form of tweets. It provides richer content of sentiment and opinions of popular topics. Opinions are categorized into positive, negative or neutral. It is very useful where the company wants the feedback about their product. This paper focuses different information analysis techniques, ranking & classifying tweeter user, fuzzy logic based sentiment classification and analysis of sentiment.
Keywords
Social Media, Twitter, Classification, Fuzzy Logic.References
- Wu, S., Hofman, J. M., Mason, W. A., & Watts, D. J. (2011). Who says what to whom on twitter. Proceedings of the 20th International Conference on World Wide Web. ACM New York, NY, USA.
- Bastos, M. T., Travitzki, R., & Puschmann, C. (2012). What sticks with whom? Twitter follower- followee networks and news classification. Proceedings of 6th International AAAI Conference on Weblogs and Social Media—Workshop on the Potential of Social Media Tools and Data for Journalists in the News Media Industry.
- Natural language processing. From https://en.wikipedia.org/wiki/Natural_language_processing
- Akshi Kumar and Teeja Mary Sebastian, “Sentiment Analysis on Twitter”, IJCSI International Journal of Computer Science Issues, Vol. 9, Issue 4, No 3, July 2012, pp. 372-378.