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Varatharajan, R.
- Performance Evaluation of Low Density Parity Check Codes (LDPC) under Constraints of Phase and Frequency Offset for a Software Defined Radio (SDR) System
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Authors
Affiliations
1 Research Scholar, Department of ECE, Bharath University, Chennai, IN
2 Director-Research, Cape Institute of Technology, Kanyakumarai, IN
1 Research Scholar, Department of ECE, Bharath University, Chennai, IN
2 Director-Research, Cape Institute of Technology, Kanyakumarai, IN
Source
International Journal of Engineering studies, Vol 4, No 2 (2012), Pagination: 127-137Abstract
Wireless communication system design has been a topic of intense research since the shift into the digital era in the 1990s. During the same period of time, microelectronic technologies reached new paradigm points as they were going deeper into the sub-micron area. This paper gives an overview of these emerging technologies along with their constraints and enablers, looking through the specific angle of how much this may impact the future of wireless system design. From this end, the paper analyzes the major requirements from the modern digital communication systems, along with the way it is foreseen to evolve, and how it can be mapped onto the microelectronic roadmap.
References
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- E. M. Witte, T. Kempf, V. Ramakrishnan, G. Ascheid et al., “SDR Baseband Processing Portability: A Case Study,” in 5th Karlsruhe Workshop on Software Radios (WSR2008), Germany, 2008.
- Software Defined Radio, http://www.sdrforum.org/, Nov. 2009. [22] Next Generation Mobile Networks (NGMN) Alliance,http://www.ngmn.org/, Nov. 2009.
- V. Ramakrishnan, E. M. Witte, T. Kempf, D. Kammler, G. Ascheid et al.,“Efficient and Portable SDR Waveform Development: The Nucleus Concept,” in Military Communications Conference (MILCOM 2009),Boston, USA, 2009.
- P. Wurm, “A Digital LINC Radio Transmitter Architecture for Opportunistic Radio,” in IEEE Vehicular Technology Conference (VTC), Barcelona, Apr. 2009.
- Role of Natural Enemies in the Management of Lipaphis erysimi (Kalt.) on Brassica juncea Var. Rugosa (Linn.)
Abstract Views :182 |
PDF Views:134
Authors
Affiliations
1 Department of Life Sciences, Manipur University, Canchipur, Imphal 795 003, IN
1 Department of Life Sciences, Manipur University, Canchipur, Imphal 795 003, IN
Source
Journal of Biological Control, Vol 16, No 1 (2002), Pagination: 27-30Abstract
The role of natural enemies on the population of Lipaphis erysimi (Kalt.) infesting B. juncea var. rugosa (Linn.) has been studied in three consecutive crop seasons (1993-96). The study revealed the occurrence of about a dozen natural enemies belonging to four groups viz., syrphids, coccinellids, hemerobiid and aphidiid. Among these, syrphids were found to be dominant over the others in terms of density, species composition and prey consumption potential.Keywords
Aphidiid, Coccinellids, Hemerobiid, Lipaphis erysimi, Natural Enemy, Syrphids.Full Text
- Design of Wallace Tree Multiplier Using Modified Carry Save Adder
Abstract Views :187 |
PDF Views:3
Authors
Affiliations
1 Department of Electronics and Communication Engineering, Sri Lakshmi Aammal Engineering College, Chennai-73, IN
1 Department of Electronics and Communication Engineering, Sri Lakshmi Aammal Engineering College, Chennai-73, IN
Source
Digital Signal Processing, Vol 5, No 6 (2013), Pagination: 230-234Abstract
Arithmetic and Logic Unit (ALU), core unit of a processor, when used for scientific computations, will spend more time in multiplications. For higher order multiplications, a huge number of adders are to be used to perform the partial product addition. Reducing delay in the multiplier reduces the overall computation time. Wallace multipliers perform in parallel, resulting in high speed. It uses full adders and half adders in their reduction phase. Reduced Complexity Wallace multiplier will have fewer adders than normal Wallace multiplier. A new 16×16 multiplier is proposed with fast adders at the final stage of Wallace multipliers to reduce the delay. The presence of larger carry propagating adder indicates wallace multiplier as faster multiplier. The fast adder (Modified carry save adder) is used at the final stage of the Wallace multipliers to reduce the delay. This paper presents a detailed analysis of several fast adder architectures for high performance VLSI design.Keywords
Parallel Prefix Adder, Carry Save Adder, Wallace Multiplier, Modified Carry Save Adder, High Speed Adder.- A new record of Franklinothrips megalops (Trybom, 1912) (Aeolothripidae: Thysanoptera) from North Eastern India
Abstract Views :309 |
PDF Views:114
Authors
Affiliations
1 Division of Insect Systematics, National Bureau of Agricultural Insect Resources, Bengaluru 560024, IN
2 Centre of Advanced Study in Life Sciences, Manipur University, Imphal, Manipur 795003, IN
1 Division of Insect Systematics, National Bureau of Agricultural Insect Resources, Bengaluru 560024, IN
2 Centre of Advanced Study in Life Sciences, Manipur University, Imphal, Manipur 795003, IN
Source
Journal of Biological Control, Vol 30, No 2 (2016), Pagination: 119-120Abstract
Franlinothrips megalops (Trybom), a predatory thrips on several species of thrips was recorded from Tripura, North east India for the first time.Keywords
Franklinothrips megalops, record, Tripura, North East IndiaFull Text
References
- Ananthakrishnan TN, Sen S. 1980. Taxonomy of Indian Thysanoptera. Handbook Series No.1, Zoological Survey of India, Kolkata. 234 pp.
- Mound LA, Reynaud P. 2005. Franklinothrips, a pantropical Thysanoptera genus of ant mimicking obligate predators (Aeolothripidae). Zootaxa 864: 1–16.
- Palmer JM, Mound LA, Heaume J. 1989. Guides to insects of importance to man 2. Thysanoptera. International Institute of Entomology, British Museum Natural History, London. 74 pp.
- Sen S, Pramanik NK, Sen GCK. 1988. Thysanoptera fauna of North Eastern India. Records Zool Surv India. Occasional Paper No. 100: 1–121.
- ThripsWiki. Available from http://thrips.info/wiki/Main- Page. (Accessed on 18 April 2016).
- Tyagi K, Kumar V. 2016. Thrips (Insecta: Thysanoptera) of India – An updated checklist. Halteres 7: 64–98.
- Varatharajan R. 2005. Faunastic diversity of thrips (Thysanoptera) of North Eastern India. Manipal University. 74 pp.
- Veer V. 2010. A new species of Franklinothrips (Thysanoptera: Terebrantia: Aeolothripidae) from Uttarakhand, India. Ann Entomol. 28(2): 7–9.
- Preliminary Pharmacognostical and Phytochemical Studies of Leaves of Hemigraphis colorata
Abstract Views :168 |
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Authors
J. Saravanan
1,
W. R. Shariff
2,
H. Joshi Narasimhachar
2,
R. Varatharajan
2,
V. G. Joshi
3,
A. Karigar Asif
4
Affiliations
1 Sarada Vilas College of Pharmacy, Mysore- 570004, Karnataka, IN
2 Sarada Vilas College of Pharmacy, Krishnamurthypuram, Mysore-570004, Karnataka, IN
3 Marata Mandal College of Pharmacy, Belgaum, Karnataka, IN
4 Genba Sopanrao Moze College of Pharmacy, Pune, IN
1 Sarada Vilas College of Pharmacy, Mysore- 570004, Karnataka, IN
2 Sarada Vilas College of Pharmacy, Krishnamurthypuram, Mysore-570004, Karnataka, IN
3 Marata Mandal College of Pharmacy, Belgaum, Karnataka, IN
4 Genba Sopanrao Moze College of Pharmacy, Pune, IN
Source
Research Journal of Pharmacognosy and Phytochemistry, Vol 2, No 1 (2010), Pagination: 15-17Abstract
The aim of this research was to develop the pharmacognostical parameters and phytochemical screening alongwith histological studies and quantitative microscopy of the leaf powder of Hemigraphis colorata.
The dried leaves of Hemigraphis colorata (Family: Acanthaceae) were subjected to standardization by following pharmacognostical and phytochemical screening methods. Methanolic extract was subjected to thin layer chromatography (TLC) to find out various phytoconstituents.
Microscopic study showed the presence of Cuticle, covering trichome, single layered thick walled epidermis, palisade cells, transfusion tissue, spongy cells, vascular bundle and chlorenchyma. Phytochemical screening reported the presence of alkaloids, tannins, proteins; steroids and sterols were present in Methanolic extract. TLC showed two different Rf values (0.86 and 0.36) with different nature of their residues.
Keywords
Phytochemical screening, TLC, Hemigraphis Colorata.- Thysanoptera Fauna of the Itanagar Wild Life Sanctuary, (Arunachal Pradesh)
Abstract Views :214 |
PDF Views:110
Authors
Affiliations
1 Department of Life Sciences, Manipur University, Imphal-795 003, IN
2 Department of Zoology, Rajiv Gandhi University Rono Hills, Itanagar, Arunachal Pradesh-791112, IN
1 Department of Life Sciences, Manipur University, Imphal-795 003, IN
2 Department of Zoology, Rajiv Gandhi University Rono Hills, Itanagar, Arunachal Pradesh-791112, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 112, No 3 (2012), Pagination: 35-43Abstract
The earliest work on the faunistic study of thrips of Arunachal Pradesh was initiated by the Zoological Survey of India way back 1970s and that survey resulted in the collection of 8 species along with the discovery of a new species namely Liothrips ananthakrishnani Sen,1976. Subsequently, Sen et al., (1988) gave a consolidated list of all the nine species collected from different places of Arunachal Pradesh. Recently Singh et al., (2010) collected 23 species of thrips from Kane Wildlife Sanctuary, Arunachal Pradesh.Keywords
Thysanoptera, Thrips, Faunastic Study.Full Text
- On the Collections of Predatory thrips (Insecta: Thysanoptera) from NE India
Abstract Views :281 |
PDF Views:143
Authors
Affiliations
1 Centre of Advanced Study in Life Sciences, Manipur University, Imphal – 795003, Manipur, IN
2 National Bureau of Agricultural Insect Resources (ICAR-NBAIR), Bengaluru – 560024, Karnataka, IN
1 Centre of Advanced Study in Life Sciences, Manipur University, Imphal – 795003, Manipur, IN
2 National Bureau of Agricultural Insect Resources (ICAR-NBAIR), Bengaluru – 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 32, No 1 (2018), Pagination: 8-13Abstract
A dozen species of predatory thrips collected from the national parks and wildlife sanctuaries of biodiversity rich northeastern India, belonging to 9 genera in 3 families viz., Aeolothripidae, Thripidae and Phlaeothripidae are reported here with the details of their habitat, prey species that they encounter and geographic distribution of predator along with the key to identify them. The data on predatory thrips of NE India showed that the aeolothripids are represented by 6 species in 5 genera, thripids by a genus and a species and the phlaeothripids by 5 species in 3 genera.Keywords
Bio-Control, Hotspots of NE India, Species Diversity, Thysanoptera.Full Text
References
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- Cross infection of Pieris brassicae granulosis virus on other siblings of Pieris species
Abstract Views :259 |
PDF Views:182
Authors
Affiliations
1 CAS in Life Sciences, Manipur University, Imphal - 795003, Manipur, IN
2 Division of Germplasm Collection & Characterization, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru - 560024, Karnataka, IN
1 CAS in Life Sciences, Manipur University, Imphal - 795003, Manipur, IN
2 Division of Germplasm Collection & Characterization, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru - 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 33, No 4 (2019), Pagination: 385-388Abstract
Pieris brassicae granulosis virus (PibrGV) has been found to infect yet another two siblings namely P. canidia Linn. & Pontia daplidice (= Pieris daplidice) (Roeber) in addition to P. brassicae (Linn.). The susceptibility of P. canidia and P. daplidice has been established clearly in this work by inoculating them with PibrGV @ 5 × 104 occlusion bodies (OBs) per ml by the conventional leaf disc method. All the inoculated larvae e × hibited typical symptoms of viral infection after 5-7 days of post infection. The above three species of the genus Pieris occur on cabbage and cauliflower plants at different periods in the valley region of Imphal and therefore, it is possible to control all the three species of Pieris using the same virus. LC50 value of PibrGV on P. brassicae, P. canidia and P. daplidice was found to be 7.9 × 104; 10 × 106; and 6.3 × 106 OBs/ml and the LT50 was 134.89; 138.03; 174.50 hours, respectively.Keywords
Cross Infection, Granulosis Virus, Pieris canidia, Pieris brassicae, Pontia daplidiceFull Text
References
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- Mycophagous Phlaeothripidae (Thysanoptera: Tubulifera) in The Indian Subcontinent
Abstract Views :103 |
PDF Views:65
Authors
Affiliations
1 Department of Zoology, Centre of Advanced Study in Life Sciences Manipur University, Imphal 795003, Manipur, IN
1 Department of Zoology, Centre of Advanced Study in Life Sciences Manipur University, Imphal 795003, Manipur, IN
Source
Indian Journal of Entomology, Vol 84, No 1 (2022), Pagination: 213-222Abstract
Mycophagous Phlaeothripidae (Thysanoptera: Tubulifera:) are recognizable as (a) fungal-hyphae-feeding mycetophagous Phlaeothripinae, living on fungi that infest dry twigs and (b) fungal-spore-feeding sporophagous Idolothripinae, usually present on leaf litter. In the Indian subcontinent, out of 765 species of known Thysanoptera, nearly 152 species in 66 genera fall within the mycophagous group of the Phlaeothripidae with 54 idolothripine and 98 phlaeothripine species. Taxonomic diversity of these species in bamboo- and oak-leaf litter and pine forests in the sub-Himalayan ecosystems of North-Eastern India are discussed in this article, along with the diversity that is apparent in their developmental patterns, thrips-plant-fungus association, and phenotypic plasticity, supplemented with a note on their ecological implications.Keywords
Phlaeothripidae, bamboo, pine, plant fungus, association, development, ecological implications, fungal spores and mycelia, taxonomic diversity, leaf litter, phenotypic plasticity, oak leaf litterFull Text
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