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Acreage estimation of kharif rice crop using Sentinel-1 temporal SAR data
Subbarao Nandepu V. V. S. S. Teja,Mani Jugal Kishore,Shrivastava Ashish,Srinivas Kumar Samayamantula,Varghese A. O. 대한공간정보학회 2021 Spatial Information Research Vol.29 No.4
Rice is one of the most important food crop in India covering about one-fourth of the total cropped area. India is the second largest producer and consumer of rice and accounts for 21% of the world’s total rice production. Rice is fundamentally a kharif season crop and grown in mainly rainfed areas. Recently there is a considerable increase in production, area and yield of rice crop in India. Temporal monitoring of crop area under cultivation is essential for the sustainable management of agricultural activities on both national and global levels. The present study is envisaged to estimate area under kharif rice using multi-temporal Sentinel-1 Synthetic Aperture Radar (SAR) data with dual polarization (VH and VV) in Bhandara district of Maharashtra. The geographical area of Bhandara district is 4087 square kilometres and lies in between 20640 030 ’ to 21600 180 ’ N latitude and 79440 930 ’ to 80080 700 ’ E longitude. The rice area is extracted using Random Forest (RF) classification techniques available in SNAP tool and validated using the ground observation collected from the field. An area of 1760 square kilometres was found under kharif rice out of 4087 square kilometres area of entire Bhandara district. The rice is predominant crop and covered around 43% of the total geographical area of Bhandara district during kharif season. The user accuracy (omission error), producer accuracy (commission error) for rice crop, overall accuracy and Kappa coefficients were 82.7, 90.0, 91% and 0.80, respectively. The study found that SAR data can be successfully used for acreage estimation with RF classifier.
Avanish Kumar Srivastava,D. Shah,T.H. Mahato,Beer Singh,A. Saxena,A.K. Verma,S. Shrivastava,A. Roy,S.S. Yadav,A.R. Shrivastava 한국탄소학회 2012 Carbon Letters Vol.13 No.2
A nuclear, biological, chemical (NBC) canister was indigenously developed using active carbon impregnated with ammoniacal salts of copper (II), chromium (VI) and silver (I), and high efficiency particulate aerosol filter media. The NBC canister was evaluated against carbon tetra chloride (CCl4) vapours, which were used as a simulant for persistent chemical warfare agents under dynamic conditions for testing breakthrough times of canisters of gas masks in the National Approval Test of Respirators. The effects of CCl4 concentration, test flow rate, temperature, and relative humidity (RH) on the breakthrough time of the NBC canister against CCl4 vapour were also studied. The impregnated carbon that filled the NBC canister was characterized for surface area and pore volume by N2 adsorption-desorption isotherm at liquid nitrogen temperature. The study clearly indicated that the NBC canister provides adequate protection against CCl4 vapours. The breakthrough time decreased with the increase of the CCl4 concentration and flow rate. The variation in temperature and RH did not significantly affect the breakthrough behaviour of the NBC canister at high vapour concentration of CCl4, whereas the breakthrough time of the NBC canister was reduced by an increase of RH at low CCl4 vapour concentration.
A Critical Analysis of Congestion Adaptive Routing Protocols for Mobile Ad-Hoc Networks
Laxmi Shrivastava,G. S. Tomar 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.6
Congestion in mobile ad hoc networks leads to transmission delays and packet losses and causes wastage of time and energy on recovery. In the current designs, routing is not congestion adaptive. Routing may let a congestion happen which is detected by congestion control, but dealing with congestion in this reactive manner results in longer delay and unnecessary packet loss and requires significant overhead if a new route is needed. This problem becomes more visible especially in large-scale transmission of heavy traffic such as multimedia data, where congestion is more probable and the negative impact of packet loss on the service quality is of more significance. Routing should not only be aware of, but also be adaptive to, network congestion. Routing protocols which are adaptive to the congestion status of a mobile ad hoc network can greatly improve the network performance. Many protocols which are congestion aware and congestion adaptive have been proposed. In this paper, we present a survey of congestion adaptive routing protocols for mobile ad hoc networks.
Synthesis and In-vitro Activity of Some New Class of Thiazolidinone and Their Arylidene Derivatives
Seelam, Nareshvarma,Shrivastava, S.P. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
In an attempt to find a new class of anti microbial agents, a series of thiazolidinone and their 5-arylidene derivatives containing 4-(4-methyl benzamido)-benzoyl moiety were synthesized via the reaction of benzocaine with appropriate chemical reagents. These compounds were screened for their antibacterial activity against Gram-positive bacteria (Bacillus subtilis and Bacillus thuringiensis), Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa) and antifungal activity against Botrytis fabae, Fusarium oxysporan and Candida albicans. On the other hand the synthesized compounds were also screened for their anti tubercular activity. IR, $^1H$ NMR, $^{13}C$ NMR and MS spectral analyses established the structures of the newly synthesized compounds. The results revealed that some of these compounds have shown promising antimicrobial and anti tubercular activity in comparison with standard drugs.
Synthesis and In-vitro Activity of Some New Class of Thiazolidinone and Their Arylidene Derivatives
Nareshvarma Seelam,S. P. Shrivastava 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
In an attempt to find a new class of anti microbial agents, a series of thiazolidinone and their 5-arylidene derivatives containing 4-(4-methyl benzamido)-benzoyl moiety were synthesized via the reaction of benzocaine with appropriate chemical reagents. These compounds were screened for their antibacterial activity against Gram-positive bacteria (Bacillus subtilis and Bacillus thuringiensis), Gram-negative bacteria (Escherichia coli,Pseudomonas aeruginosa) and antifungal activity against Botrytis fabae, Fusarium oxysporan and Candida albicans. On the other hand the synthesized compounds were also screened for their anti tubercular activity. IR, ^1H NMR, ^13C NMR and MS spectral analyses established the structures of the newly synthesized compounds. The results revealed that some of these compounds have shown promising antimicrobial and anti tubercular activity in comparison with standard drugs.
Current Scenario of Legume Lectins and Their Practical Applications
Ajay Kumar Gautam,Nidhi Shrivastava,Bechan Sharma,Sameer. S. Bhagyawant 한국작물학회 2018 Journal of crop science and biotechnology Vol.21 No.3
Lectins are diverse group of carbohydrate binding proteins distributed ubiquitously in plant species. Lectins are the subject of intense investigation. Therefore, in the past few years studies on legume lectins with respect to their biochemical and pharmacological properties have been extensively carried out. Legume lectins are reported to contain antifungal, mitogenic, immunomodulatory, and antitumor properties. Some of the lectin also display anti-HIV-1 reverse transcriptase and antineoplastic activities. Plant lectins are expected to open new vistas for the design and development of drugs to be used against different serious diseases. This article aims to review up-to-date advances of legume lectins vis-à-vis structure, biological properties, and their practical applications.
Performance Evaluation of AODV Using Fuzzy Logic to Reduce Congestion in MANET
Vikas Thakur,Laxmi Shrivastava,Sarita S.Bhadauria 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.5
Mobile ad-hoc network is an infrastructure less network as it doesn’t follow any particular network topology. In MANET congestion is a major problem in small size networks congestion’s effect is low as compared to the large size networks. Congestion degrades the performance of overall network drastically. Many algorithms have been proposed to handle the congestion famous one are the active que management algorithms (AQMs). But still there is no universally accepted solution for it. In this paper a congestion control solution is devised using fuzzy logic controller. In this node density and load are taken as input and packet drop probability as output, which is effective to control congestion in large networks.
Multiple fibro-osseous lesions of the jaws: A report of a rare case with a literature review
Makkad, Ramanpal Singh,Naidu, Giridhar S.,Nagi, Ravleen,Sagtani, Alok,Patil, Santosh,Shrivastava, Swatantra Korean Academy of Oral and Maxillofacial Radiology 2021 Imaging Science in Dentistry Vol.51 No.-
Fibro-osseous lesions are a poorly defined category of conditions affecting the jaws and craniofacial bones, and include developmental lesions, reactive or dysplastic lesions, and neoplasms. Fibrous dysplasia and ossifying fibroma are the 2 main types of fibro-osseous lesions affecting the jaw, and ossifying fibroma is a true benign neoplasm of the bone-forming tissues with several well-recognized variants ranging from innocuous to extensively aggressive lesions. However, multiple simultaneous fibro-osseous lesions of the jaw bones involving all quadrants are exceedingly rare. One such case diagnosed by conventional radiography and computed tomography is discussed here.
Multiple fibro-osseous lesions of the jaws: A report of a rare case with a literature review
Makkad Ramanpal Singh,Naidu Giridhar S.,Nagi Ravleen,Sagtani Alok,Patil Santosh,Shrivastava Swatantra 대한영상치의학회 2021 Imaging Science in Dentistry Vol.51 No.4
Fibro-osseous lesions are a poorly defined category of conditions affecting the jaws and craniofacial bones, and include developmental lesions, reactive or dysplastic lesions, and neoplasms. Fibrous dysplasia and ossifying fibroma are the 2 main types of fibro-osseous lesions affecting the jaw, and ossifying fibroma is a true benign neoplasm of the bone-forming tissues with several well-recognized variants ranging from innocuous to extensively aggressive lesions. However, multiple simultaneous fibro-osseous lesions of the jaw bones involving all quadrants are exceedingly rare. One such case diagnosed by conventional radiography and computed tomography is discussed here.