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Enhancing Security in QR Code Technology Using AI: Exploration and Mitigation Strategies

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In-plane and out-of-plane quasi-static compression performance enhancement of 3D printed re-entrant diamond auxetic metamaterial with geometrical tuning and fiber reinforcement

International Journal of Intelligence Science（智能科学国际期刊） 2024年第2期 49页

作者： Saranya Vaithilingam Santhosh Aradhya Mohan shankar

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Defence Technology(防务技术) 2023年第7期25卷 1-17页

作者： Niranjan Chikkanna shankar krishnapillai Velmurugan Ramachandran Department of Mechanical Engineering Indian Institute of Technology Madras600036India Department of Aerospace Engineering Indian Institute of Technology Madras600036India

Auxetic materials are cellular materials with a unique property of negative Poisson’s *** auxeticity and performance of these metamaterials utterly depend on the geometrical parameters and loading *** the first time,the quasi-static uniaxial compression performance of fused filament fabricated re-entrant diamond auxetic metamaterial is evaluated in the x-direction(in-plane)and z-direction(out-of-plane).The most commonly used thermoplastic feedstock,Acrylonitrile butadiene styrene,is considered a material of *** effect of influential geometrical parameters of the re-entrant diamond structure and printing parameter is systematically studied using Taguchi’s design of ***-based multi-objective optimisation technique has been adopted to arrive at the optimal *** are made to improve the stiffness and strength of the structure with fibre *** glass fibre reinforcements have enhanced specific strength and stiffness in both in-plane and out-ofplane directions.A sevenfold and thirteen times increase in specific strength and energy absorption is evident for glass fibre-reinforced structures in out-of-plane directions compared to in-plane *** tuning of geometrical parameters of the re-entrant diamond structure can result in a Poisson’s ratio of up to-3.49 when tested in the *** parametric study has illustrated the tailorability of the structure according to the application *** statistical study has signified each considered parameter’s contribution to the compression performance characteristics of the 3D printed re-entrant diamond auxetic metamaterial.

关键词： Auxeticity Fibre reinforcement Tailorability Anisotropy Geometrical influence Property enhancement

Efficacy of diurnal BG-Sentinel traps to capture nocturnal adult Armigeres subalbatus mosquitoes and impact of altitudinal variations in forests

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Asian Pacific Journal of Tropical Medicine 2019年第11期12卷 512-519页

作者： Devi shankar Suman Zoological Survey of India New AliporeKolkataWest Bengal700053India

Objective:To establish an efficacious and efficient surveillance method of Armigeres(Ar.)subalbatus,a known filarial vector,surviving in forest habitats to estimate realistic population density and assess the impact of altitudinal variations on the efficacy of the ***:In the study,12 locations in areas with an altitudinal range from 82 m to 920 m were selected in three reserve forests for night sampling of adult *** mosquito using standard chemical lure based BG-Sentinel traps and CDC-light traps in *** of locations and time were estimated on the efficacy of traps as mosquito density using multifactor analysis of variance for significant *** of altitudinal variations on the efficacy of traps was assessed using multiple regression with slope ***:BG-Sentinel trap collected significantly more adult ***,4.43 folds in Gorumara NP,5.19 folds in Neora Valley NP and 12.10 folds in Mahananda WLS than the CDC-light trap irrespective to ***-Sentinel traps were tolerant of altitudinal variations(80 m-170 m)and showed no significant relationship between density and altitudes in contrast to CDC-light traps which showed a significant negative impact on capturing efficacy with increase in altitudes(P<0.001).Conclusions:The study suggests that BG-Sentinel traps can be used effectively and efficiently to collect more *** mosquitoes during night time in comparison to CDC-light trap under complex climatic conditions of forest and variable altitudes.

关键词： Mosquitoes Surveillance Adult mosquito traps Altitudinal variations Armigeres subalbatus

A review of conventional and renewable biodiesel production

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Chinese Journal of Chemical Engineering 2021年第12期34卷 1-17页

作者： P.Vignesh A.R.Pradeep kumar N.shankar Ganesh V.Jayaseelan k.Sudhakar Department of Mechanical Engineering Indira Institute of Engineering and TechnologyTiruvallurIndia Department of Mechanical Engineering Dhanalakshmi College of EngineeringChennaiIndia Department of Mechanical Engineering Kingston College of EngineeringVelloreIndia Department of Mechanical Engineering Prathyusha Engineering CollegeChennaiIndia Faculty of Mechanical and Automotive Engineering Technology Universiti Malaysia Pahang26600 PekanPahangMalaysia Automotive Engineering Centre Universiti Malaysia Pahang26600 PekanPahangMalaysia

The need for sustainable fuels has resulted in the production of renewables from a wide range of sources,in particular organic fats and *** use of biofuel is becoming more widespread as a result of environmental and economic *** efforts have been made to substitute fossil fuels with green *** molecules extracted from processed animal fats and organic plant materials are considered alternatives for the use in modern engine *** different methods have been adopted for converting esters in vegetable oils/animal fats into compounds consistent with petroleum products,namely the transesterification and the hydro-processing of ester bonds for the production of *** review paper primarily focuses on conventional and renewable biodiesel feedstocks,the catalyst used and reaction kinetics of the production process.

关键词： Biofuel Methy esters from fatly acids Renewable diesel kinetics Catalyst Transesterification

Effect of pellet die diameter on density and durability of pellets made from high moisture woody and herbaceous biomass

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Carbon Resources Conversion 2018年第1期1卷 44-54页

作者： Jaya shankar Tumuluru 750 University Blvd Biofuels DepartmentEnergy Systems LaboratoryIdaho National LaboratoryIdaho FallsID 83415-3750USA

Densified products produced from pellet mill are commercially used as a commodity type product for energy applications that are transported nationally and *** quality of the pelletized biomass produced depends on the process variables such as die diameter,length to diameter(L/D)ratio,die speed,preheating,and steam conditioning;and feedstock variables such as feedstock type,moisture content,and particle size and *** the present study,pelleting tests were conducted with both woody(i.e.,lodgepole pine and pinyon-juniper)and herbaceous(i.e.,corn stover,wheat straw,and energy sorghum)biomass.A high level of feedstock moisture content of 33%(w.b.)was selected,while the die speed and preheating temperature process variables were kept at 60 Hz(380 rpm)and 70*** indicated that during the pelleting and cooling process,an approximate 10–13%(w.b.)moisture loss in both the woody and herbaceous biomass was *** high moisture pellets produced were further dried in a laboratory oven at 70C for three hours to reduce the moisture content of the pellets tok,and tapped density;and *** pellets that resulted in the highest unit,bulk,and tapped densities following this process were the herbaceous biomass corn stover(e.g.,>1133,>580,>620 kg/m3)and the woody biomass lodgepole pine(e.g.,>1037,>568,>641 kg/m3),*** the case of durability for the 8 mm diameter pellets,wheat straw and corn stover recorded a maximum of about 96%,respectively,while the lodgepole pine and pinion juniper recorded a maximum of>96%,respectively.

关键词： Woody and herbaceous biomass High moisture pelleting Unit Bulk density Tapped density Durability

Alkali activated slag-fly ash concrete incorporating precious slag as fine aggregate for rigid pavements

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第1期9卷 78-92页

作者： Avinash Talkeri A.U.Ravi shankar Department of Civil Engineering National Institute of Technology KarnatakaSurathkalMangalore 575025India

This study aims to develop the alkali activated slag-fly ash concrete(AASFC) using precious slag(PS) ball as the fine aggregate. The slag-fly ash proportion, sodium silicate/sodium hydroxide(SS/SH) ratio and sodium hydroxide concentration are the prime variables. The fresh concrete properties like workability, setting time and the hardened concrete properties of AASFC developed under ambient curing were analyzed and similar way by replacing with fly ash(FA). The sodium hydroxide concentration of 8 M, 10 M and 12 M, SS/SH ratio of 1.0, 1.5 and 2.0, alkaline liquid to binder ratio of 0.35 and variation in slag-fly ash proportion as major inputs for mix design. The test results showed that, the fresh state of AASFC blend has a shorter setting time of 12-16 min, because of calcium mineral from the FA, the workability and setting time of AASFC mix was enhanced by the addition of the trisodium phosphate as a retarder. At the higher SS/SH extent, the workability and setting time exaggerated, whereas the increased FA content and sodium hydroxide concentration had a greater influence on the fresh state of concrete. Also, the sodium hydroxide concentration, SS/SH ratio and slag-fly ash proportion are the most inducing parameters on the workability, setting time and strength parameters of AASFC.

关键词： Road engineering Slag-fly ash proportion SS/SH ratio Molarity AASFC PS ball

Frequency domain analysis of pre-stressed elastomeric vibration isolators

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Defence Technology（防务技术） 2023年第7期25卷 33-47页

作者： S.Somanath R.Marimuthu shankar krishnapillai Indian Space Research Organisation Anthariksh BhavanNew BEL RoadBengaluru560231India STR/VSSC Indian Space Research OrganisationThiruvananthapuram695022India Department of Mechanical Engineering IIT MadrasChennai600036India

Two types of elastomeric vibration isolators used for equipment vibration isolation in aerospace vehicles are considered for the present study. These isolators are constructed using elastomers mounted in steel encasings. These isolators are initially deformed statically and dynamic loads are applied on the deformed configuration. To capture the static deformation, equivalent static load corresponding to its load rating and specified displacements are created. Static deformation is computed using Finite Element methods with four node axi-symmetric element which include the geometric non-linear effect for steel and with standard Yeoh hyper-elastic material model for elastomers(Muhammed and Zu, 2012) [1]. Yeoh material constants are derived from uni-axial tension test data of the elastomer specimen. These isolators are subjected to harmonic and random excitations in the pre-deformed state. For numerical analysis, elastomeric constants at dynamic conditions are obtained as complex function of frequency using Dynamic Mechanical Analyzer(DMA) for a range of frequencies. The standard material model of Yeoh is modified incorporating frequency dependant material characteristics and damping in the range of frequencies of interest. A multiplicative non-separable variables law is derived for Yeoh material model to include the effect of static pre-stress, based on the methodology given in literature(Nashif et al.,1985;Beda et al., 2014) [2,3]. The modifications of Yeoh model suitable for frequency domain analysis is the novelty in the present study. In the analysis, while dynamic loads are applied, the configuration is updated considering initial static loading. The frequency response of the isolators is computed using material properties evaluated at progressive dynamic strains until a match in natural frequency is observed. Appropriate damping corrections are then incorporated to match the test observed transmissibility. Then updated material properties are used to compute the

关键词： Elastomer Isolator Axi-symmetric Frequency Random Response Strain amplitude Complex modulus Transmissibility

Unravelling the situation of malaria misdiagnosis in India:Its adverse impact and management strategies

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Asian Pacific Journal of Tropical Medicine 2022年第7期15卷 290-292页

作者： Gaurav kumar Hari shankar ICMR-National Institute of Malaria Research Sector-8DwarkaDelhiIndia Indian Council of Medical Research New DelhiIndia

Malaria is a public health problem in several parts of India.A continuous decrease in malaria has been reported in India,from about 2.0 million cases in 2000 to about 0.2 million in 2020[1].In February 2016,the Government of India formally launched the National Framework for Malaria Elimination,which outlines the strategies for eliminating malaria from India by 2030[2].It aims to interrupt indigenous malaria transmission(zero indigenous case reporting)throughout the country,prevent the re-establishment of transmission in areas where it has been eliminated,and maintain national malaria-free status by 2030 and beyond,using the existing intervention tools and *** 2017,India launched its five-year National Strategic Plan for Malaria Elimination,which is mainly district focused rather than the National Framework for Malaria Elimination,which was state focused[3].India has shown a 71%reduction of malaria cases in 2019 compared to 2015,which was achieved by strengthening surveillance,improving diagnosis and treatment,and intensive vector control measures using existing *** India,Odisha state contributed 37.4%of total malaria cases in 2015,which was reduced to 12%in 2019 using the Durgama Anchalare Malaria Nirakaran initiative and comprehensive case management of malaria[4].

关键词： malaria Malaria India

A hierarchical analytical model for performance management of integrated logistics

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Journal of Management Analytics 2019年第2期6卷 173-208页

作者： Mahamaya Mohanty Ravi shankar Department of Management Studies Indian Institute of Technology DelhiNew DelhiIndia

In this paper,a holistic hierarchical analytical model is proposed to assess the performance of enablers in an integrated logistics *** to the ambiguous and complex environment,various refinements are needed to assess enablers and prioritize for the criteria such as economic,operational,and *** proposed hierarchical model is developed by a systematic approach that includes fuzzy analytical hierarchy process(FAHP),triangular fuzzy numbers(TFN),an evidential reasoning algorithm(ERA),and expected utility theory(EUT).The FAHP is used to analyze and obtain the weights of the criteria by considering the expert’s *** is used to synthesize the enablers based on the selected *** enablers are represented using subjective assessment along with a set of evaluation grades for a qualitative *** helps in obtaining crisp values of enablers for their performance *** these set of methodologies,a hierarchical model is proposed that prevent low flexibility and inadequate appropriateness of the proposed ***,the model helps in scenario generation for the logistics professionals who are facing various problems in integrating logistics and incorporating sustainability due to lack of appropriate methodologies and evaluation ***,sensitivity analysis is used for overall model validation.

关键词： fuzzy analytical hierarchy process(FAHP) evidential reasoning algorithm(ERA) triangular fuzzy numbers(TFN) expected utility theory(EUT) integrated logistics sustainability