Informatics Publishing Limited

N. V. Nanda Kumar , A. Nagarjuna , P. Mallikarjuna Rao , P. V. Chalapathi Rao

Abstract

Nelapattu Bird Sanctuary (Lat. 13°49' N to 31°51' N; Long. 79°57' E to 59°15' E) is located towards west of East coast of Bay of Bengal and about 20 km west of Pulicat Lake near Sullurpet, Nellore District, Andhra Pradesh. It is one of the biggest pelicanery having approximately 1500 pelicans (Pelecanus philippensis) breeding and roosting. It is also an ideal roosting and breeding for long distant and local migrant birds. Vertical gradient and resource partitioning of migratory birds on Barringtonia tree in Nelapattu Bird Sanctuary is being observed. A gradual and natural domination of open bill storks is observed over a period of time. A review on management of Nelapattu Bird Sanctuary is described for ecological sustainability which include irrigation water management, deweeding and prevention of algal bloom, Prosopis juliflora plantation for roosting of birds, plantation of Subabul trees for procuring nesting material. Feeding of st Krishna river water to last only up to May/June 1^st week only to avoid stabilization of new summer birds which might compete for space. A statistical relationship worked out between monsoon rainfall and pelican migration.

Keywords

Conservation, Nelapattu Bird Sanctuary Pelicans (Pelecanus philippensis)

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U. Ratna Kumari ¹, P. Mallikarjuna Rao ², G. S. N. Raju ³

Affiliations
1 Department of ECE, GIT, GITAM University, Visakhapatnam – 45, IN
2 Department of ECE, AU College of Engineering, Andhra University, Visakhapatnam-03, IN
3 Department of ECE, AU College of Engineering, Andhra University, Visakhapatnam-03, IN

Abstract

The Circular Antenna Array with Dipole radiators is practical antenna array to scan the entire azimuthal plane. The beams with narrow beamwidth and less side lobe level are very useful point to point communication. As the Circular Antenna Array suffers with high sidelobe level and broad beam problems an attempt is made here to reduce these radiation parameters with an efficient metaheuristic optimization technique BAT algorithm. Thinning process is applied on the optimized array for better results. An extensive comparison is brought out between optimized thinned array and uniformly distributed fully populated array.

Keywords

Circular Antenna Array, Dipole, Narrow Beams, Bat Algorithm and Thinning.

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V. Sreenivasulu ¹, K. N. Jayaveera ², P. Mallikarjuna Rao ³

Affiliations
1 Dept. of Biotechnology, KLR Pharmacy College, Paloncha-507115, Khammam- District, A.P, IN
2 Oil Technological Research Institute, JNT University, Anantapur–15001, A.P, IN
3 International Medical University, Kualalumpur, -57000, MY

Abstract

Production of L-asparaginase employing Aspergillus sp. VEM-9 under solid-state fermentation was optimized. Different substrates like rice bran, green gram bran, wheat rawa, wheat bran, Bombay rawa, black gram bran, barley, saw dust, jowar flour, rice flour, castor oil cake, ground nut oil cake, coconut oil cake, sesame oil cake were studied to optimize the best substrate. Groundnut oil cake showed the highest enzyme yield. Different physical fermentation factors were optimized. The maximum productivity of L-asparaginase (60 U/gds) was achieved by employing groundnut oil cake and optimized process parameters including incubation period of 5 days, initial moisture content of solid substrate 90%, 1: 10 (v/w) ratio of salt solution to weight of groundnut oil cake, inoculum level 20%(v/w), incubation temperature at 30°C and initial pH 6.5.

Keywords

L-Asparaginase, Aspergillus sp. VEM-9, Groundnut Oil Cake, Optimization, Solid-State Fermentation.

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V. Sreenivasulu ¹, K. N. Jayaveera ², P. Mallikarjuna Rao ³

Affiliations
1 Dept. of Biotechnology, KLR Pharmacy College, Paloncha-507115,Khammam- District, A.P, IN
2 Oil Technological Research Institute, JNT University, Anantapur–15001, A.P, IN
3 International Medical University, Kualalumpur, 57000, MY

Abstract

The extracellular L-asparaginase production by fungi isolated from soil samples by using pH and dye based method. Various physical and chemical parameters were optimized under submerged fermentation for Lasparaginase production. Maximum productivity of L-asparaginase (19.5 U/ml) was achieved by employing medium containing 2% (w/v) Lasparagine as substrate concentration, 1%(w/v) glucose as carbon source, 1% (w/v) ammonium sulphate as an additional nitrogen source with the incubation period of 96 h and incubation temperature at 30°C, initial pH 6.5 at an inoculum level 20% (v/v) with 48 h old inoculum was found to be optimum for maximum yield.

Keywords

L-Asparaginase, Optimization and Submerged Fermentation.

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U. Ratna Kumari ¹, P. Mallikarjuna Rao ², G. S. N. Raju ²

Affiliations
1 Department of ECE, GITAM University, Visakhapatnam – 45, IN
2 Department of ECE, AU College of Engineering, Andhra University, Visakhapatnam - 03, IN

Abstract

Pattern Synthesis is one of the important problems in all communication systems including radars. The beams with narrow beamwidth and less side lobe level are very useful in point to point communication. Most often patterns are designed using conventional design techniques. However, most of them do not yield optimized and desired patterns. In view of all these facts, intensive investigations are carried out thoroughly on the pattern synthesis techniques with the objective of obtaining narrow beams with low sidelobes from linear arrays using different novel evolutionary algorithms. The Linear Antenna Array with Dipole radiators is practical antenna array to scan the entire azimuthal plane. Hence different Optimization techniques are applied on this Linear Antenna Array. Later thinning process is applied on the optimized array for better results. An attempt is made to compare Optimized thinned array and uniformly distributed fully populated array. The results are found to be very much effective which can be used for different wireless communication applications.

Keywords

Sidelobe Level, Narrow Beams, Optimization, BAT Algorithm, Thinning.

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