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Hybrid Image Compression-Encryption Scheme Based on Multilayer Stacked Autoencoder and Logistic Map

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China Communications 2022年第1期19卷 238-252页

作者： Neetu Gupta ritu Vijay Computer Science&Engineering Department Banasthali VidyapithBanasthaliIndia Department of Electronics Engineering Banasthali VidyapithBanasthaliIndia.

Secure transmission of images over a communication channel, with limited data transfer capacity, possesses compression and encryption schemes. A deep learning based hybrid image compression-encryption scheme is proposed by combining stacked auto-encoder with the logistic map. The proposed structure of stacked autoencoder has seven multiple layers, and back propagation algorithm is intended to extend vector portrayal of information into lower vector space. The randomly generated key is used to set initial conditions and control parameters of logistic map. Subsequently, compressed image is encrypted by substituting and scrambling of pixel sequences using key stream sequences generated from logistic *** proposed algorithms are experimentally tested over five standard grayscale images. Compression and encryption efficiency of proposed algorithms are evaluated and analyzed based on peak signal to noise ratio(PSNR), mean square error(MSE), structural similarity index metrics(SSIM) and statistical,differential, entropy analysis respectively. Simulation results show that proposed algorithms provide high quality reconstructed images with excellent levels of security during transmission..

关键词： compression-encryption stacked autoencoder chaotic system back propagation algorithm logistic map

Remediation of polycyclic aromatic hydrocarbon-contaminated soils using microbes and nanoparticles: A review

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Pedosphere 2023年第1期33卷 93-104页

作者： ritu PANWAR Jyoti MATHUR Department of Bioscience and Biotechnology Banasthali VidyapithRajasthan 304022India

Polycyclic aromatic hydrocarbon(PAH)pollution is a global concern because of their toxicity to environment and ecosystem,which induces adverse effects on plants,animals,and *** are mainly released from natural and anthropogenic activities,such as incomplete fuel combustion,leakages in oil pipelines,and the extensive use of pesticides;PAH contaminants include petroleum hydrocarbons(PHCs),halogenated hydrocarbons,chlorophenols,and *** using microorganisms such as bacteria and fungi is developing as an effective and promising technique to remediate PAHs from the *** to their remediation efficiency,this method is environmentally friendly and represents a novel approach for reducing the risk of PAHs to human health and the *** may be applied in bioremediation,and will not only induce fewer toxic effects but also reduce the effective overall time and costs *** article provides a summary of the application of nanomaterials,bacteria,and fungi to PAH remediation;we review and briefly discuss the structure,properties,sources,fate,toxicity,and remediation approaches involved in the remediation of PAH-polluted sites.

关键词： bioremediation microorganisms pesticides persistent organic pollutants petroleum hydrocarbons

Nuclear magnetic resonance based structure of the protoberberine alkaloid coralyne and its self-association by spectroscopy techniques

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Journal of Pharmaceutical Analysis 2019年第6期9卷 437-448页

作者： Kumar Padmapriya ritu Barthwal Department of Biotechnology Indian Institute of Technology Roorkee

Coralyne is an important alkaloid due to its anti-cancer and other medicinal *** targets DNA in cells and acts as human topoisomerase-I poison,telomerase inhibitor and nucleic acid *** has high tendency to undergo self-association,which is a matter of concern for therapeutic *** understanding of its interaction with DNA requires precise knowledge of chemical shifts in Nuclear Magnetic Resonance(NMR)spectra besides *** present study is the first report of a complete assignment of all 1H/13C resonances in NMR spectra of coralyne in DMSO-d6 using one dimensional 1H/13C and two dimensional NMR *** chemical shift of all proton and several 13C resonances have also been obtained in D2O and *** same has been calculated using Density Functional Theory(DFT).NMR spectra of coralyne show upfield shift of 0.6e1.2 ppm in aromatic ring protons suggesting stacking *** from 11 intra molecular NOE cross peaks in 2D 1H e1H ROESY spectra,3 short distance NOE correlations,H6e10OCH3,H5e10OCH3 and H12e16CH3,give direct independent evidence of the formation of a stacked *** absorbance,fluorescence,circular dichroism and fluorescence lifetime experiments conducted in the present investigations corroborate results obtained by NMR.

关键词： Coralyne alkaloid NMR spectra Chemical shift calculations Restrained molecular dynamics

Antimicrobial ability and growth promoting effects of feed supplemented with probiotic bacterium isolated from gut microflora of Cirrhinus mrigala

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Journal of Integrative Agriculture 2015年第3期14卷 583-592页

作者： Anita Bhatnagar ritu Lamba Department of Zoology Kurukshetra University

The present studies were conducted to isolate, select, identify and characterize gut bacteria as antimicrobial and growth promoting agent for the feed of economically important fish Cirrhinus mrigala. Intestinal microflora were isolated, counted, and identified, and their in vitro antibacterial properties were determined. The results have revealed that occurrence of Gram-negative rods was around 75% and of Gram-positive rods was 25%. Among the isolates Gram-positive were maintained in nutrient agar slants at 4℃. Of these, eight strains were replica-plated on agar seeded with Aeromonas hydrophila and only one strain CM2（C. mrigala 2） exhibited antibacterial properties in vitro showing inhibition against fish pathogen by well diffusion assay. This isolated strain was identified as Bacillus cereus. This bacterium was mass cultured and incorporated in the pelleted diet（40% protein and 18 k J g^–1 gross energy） of C. mrigala to investigate its effect on growth performance, digestibility, nutrient retention and activities of digestive enzymes. The results of feeding trial revealed significantly（P〈0.05） high growth performance in terms of specific growth rate, growth percent gain in body weight（BD）（272.4±1.5）%, high apparent protein digestibility（（79.9±0.30）%） and low food conversion ratio in the group of fishes fed on diet containing B. cereus in comparison to the fishes fed on diet without probiotics. The carcass composition also revealed high accumulation of proteins（（15.28±0.15） g 100 g^–1） in fishes fed on diet containing probiotics. Intestinal enzyme activities of protease, amylase and cellulase were also significantly（P〈0.05） high in the group of fishes fed on diet supplemented with probiotics indicating the extracellular enzyme production by B. cereus. These results indicate that probiotics stimulate the digestion through the supply of digestive enzyme and certain essential nutrients to animals. Also significantly（P〈0.05） low excretion of metabolites, i.e., ammonia

关键词： Aeromonas Bacillus cereus digestive enzymes growth performance Cirrhinus mrigala probiotics

Neighborhood spaces in residential environments:Lessons for contemporary Indian context

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Frontiers of Architectural Research 2020年第1期9卷 20-33页

作者： ritu Gulati Faculty of Architecture Abdul Kalam Technical UniversityUttar Pradesh226007India

The importance of open and unbuilt neighborhood spaces in residential developments has been established by numerous *** a diverse nomenclature in varied contexts,these areas are indispensable yet often neglected and designated as leftovers in contemporary planning *** their usefulness in the Indian context of socially active and sometimes even intrusive communities,such spaces are rapidly losing their place in present-day residential environments due to the pressure of providing for the rapidly growing population coupled with mass migratory *** neighborhood spaces that impart physical,psychological,and perceptual comfort to residents have been present in spontaneously developed traditional Indian cities due to their inherent order and ***,some contemporary housing environments by eminent designers have also utilized the virtues of well-designed neighborhood *** study is a comparative analysis of three selected projects,which aspire to devise suitable methods for contemporary Indian context and achieve neighborhood comfort and an overall sense of belongingness among residents.

关键词： B.V.Doshi Charles Correa Contemporary Indian housing Raj Rewal Residential neighborhoods Traditional Indian housing

Numerical analysis approach for models of COVID-19 and other epidemics

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第3期12卷 40-62页

作者： ritu Yogesh Gupta Department of Mathematics Jaypee Institute of Information Technology A-10 Sector-62Noida-201309Uttar PradeshIndi

The world wide spread of COVID-19 epidemic has instigated an unprecedented demand and supply of research related to this *** with medical research for treatment and cure of the pandemic,efficient mathematical modeling of epidemics is the need of ***,this paper depicts a detailed and comprehensive compendium of various numerical methods used for infectious diseases modeling during last 14 years including the very recent work done for COVID-19 *** gives researchers a good insight about past work done,present efforts and future scope of numerical analysis methods for epidemic ***,this paper also proposes its numerical analysis approach based on Adomian decomposition method(ADM)for generalized SEIR model of *** proposed method is shown to give very accurate numerical results.

关键词： COVID-19 epidemic model numerical methods Adomian decomposition method(ADM)

Synthesis,characterization and photoluminescent properties of Eu(Ⅲ)complexes with 5-hydroxy-2-hydroxymethyl-4H-4-pyranone and N,N’-donor heterocyclic coligands

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Rare Metals 2021年第5期40卷 1118-1125页

作者： Shammy Laj Dhania Archana Chauhan ritu Langyan Department of Chemistry Kurukshetra UniversityKurukshetra 136119India

In present work,five novel europium complexes[Eu(L)3·Phen(2),Eu(L)3·Bipy(3),Eu(L)3·Neo(4),Eu(L)3·Biq(5)and Eu(L)3·Batho(6)]were synthesized,derived from[Eu(L)3·2 H_(2)O](1)complex by using ligand(HL)5-hydroxy-2-(hydroxymethyl)-4 H-pyran-4-one and coligands 1,10-phenanthroline,bipyridine,neocuproine,2,2’-biquinoline and *** order to seek excellent photoluminescent properties,coligands were introduced in the complexes to form a rigid conjugated system,thus enhancing luminescence properties of *** synthesized complexes reveal four narrow characteristic emission lines of Eu(III)consistent with ^(5)D0→^(7)FJ transitions,where J=0,1,2 and 3 at about 580,595,614 and 650 nm,*** ^(5)D0→^(7)F_(2) transition is responsible for strong red *** coordinate diagram also indicates that x,y coordinates lie in deep red *** data are in favour of high thermal stability of synthesized *** to their high thermal stability and strong red luminescence,these complexes might be used in fabrication of optoelectronic devices.

关键词： Photoluminescence Europium complexes Color coordinates Optoelectronic devices Thermal stability

Potential of biocontrol agents against Ganoderma lucidum causing basal stem rot in mesquite(Prosopis cineraria)in arid regions of India

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Journal of Forestry Research 2021年第3期32卷 1269-1279页

作者： ritu Mawar Deepesh Sharma Ladhu Ram ICAR-Central Arid Zone Research Institute Jodhpur 342003India College of Horticulture and Forestry JhalarapatanJhalawar 326001India

This study investigates the potential of native biocontrol agents(BCAs)as controls against Ganoderma lucidum causing root rot mortality in Indian *** disease is prevalent in sandy soils where trees grow under rainfed *** addition,a beetle namely A canthophorus serraticornis damages the roots,resulting in increasing vulnerability of the host thereby allowing easy of the *** dual culture tests,Ganoderma infected cowpea root bit experiment and compatibility with insecticides revealed that the three BCAs(Trichoderma longibrachiatum,***,and Aspergillus nidulans)significantly inhibited *** mycelial *** highest mycelial growth inhibition(47.6%)was recorded after 96 h followed by 39.8%and 29.3%at 72 and 48 h,respectively,by *** free filtrates of ***,***,and *** were superior in inhibiting mycelium growth.A low concentration(3 ml)of *** was more effective in inhibiting mycelium growth compared to other *** P rosopis julifl ora compost and onion residue compost amendments as food substrates favored the growth of these BCAs,which ultimately reduced the viability of Ganoderma-colonized root bits of *** on compatibility between insecticides and BCAs suggests that ***,harzianum and *** can be combined with phorate or chloropyriphos(both organophosphates)at variable concentrations if amended together for partially infected trees,or as a prophylactic measure in healthy *** studies demonstrate that there is considerable opportunity for using native BCAs against *** in managing root rot disease.

关键词： Trichoderma longibrachiatum Trichoderma harzianum Aspergillus nidulans Prosopis cineraria Onion residues Prosopis juliflora compost

Sarve:synthetic data and local differential privacy for private frequency estimation

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Cybersecurity 2022年第4期5卷 97-116页

作者： Gatha Varmal ritu Chauhan Dhananjay Singh Amity Institute of Information Technology Amity UniversityNoidaIndia Center for Computational Biology and Bioinformatics Amity UniversityNoidaIndia Department of Electronics Engineering HUFSSeoulKorea

The collection of user attributes by service providers is a double-edged *** are instrumental in driving statistical analysis to train more accurate predictive models like *** analysis of the collected user data includes frequency estimation for categorical ***,the users deserve privacy guarantees against inadvertent identity *** algorithms called frequency oracles were developed to randomize or perturb user attributes and estimate the frequencies of their *** propose Sarve,a frequency oracle that used Randomized Aggregatable Privacy-Preserving Ordinal Response(RAPPOR)and Hadamard Response(HR)for randomization in combination with fake *** design of a service-oriented architecture must consider two types of complexities,namely computational and *** functions of such systems aim to minimize the two complexities and therefore,the choice of privacy-enhancing methods must be a calculated *** variant of RAPPOR we had used was realized through bloom flters.A bloom filter is a memory-efficient data structure that offers time complexity of O(1).On the other hand,HR has been proven to give the best communication costs of the order of log(b)for b-bits ***,Sarve is a step towards frequency oracles that exhibit how privacy provisions of existing methods can be combined with those of fake data to achieve statistical results comparable to the original *** also implemented an adaptive solution enhanced from the work of Arcolezi et *** use of RAPPOR was found to provide better privacy-utility tradeoffs for specific privacy budgets in both high and general privacyregimes.

关键词： Synthetic data Differential privacy Frequency estimation Frequency oracle Privacy