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Geochemical elements in suspended particulate matter of Ensenada de La Paz Lagoon,Baja California Peninsula,Mexico:Sources,distribution,mass balance and ecotoxicological risks

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Journal of Environmental Sciences 2024年第2期136卷 422-436页

作者： Sandra Soledad Morales-García Pilar de Acacia Pérez-Escamilla suresh babu Sujitha Pichaimani Godwyn-Paulson Andrés Felipe Zuniga-Cabezas Muthuswamy Ponniah Jonathan Instituto Politécnico Nacional(IPN) Centro Mexicano para la Producción más Limpia(CMPL)Av.Acueducto s/nCol.Barrio la Laguna TicománDel Gustavo A.MaderoC.P.07340Ciudad de MéxicoMexico Instituto Politécnico Nacional(IPN) Escuela Superior de Ingeniería y Arquitectura(ESIA)Unidad Ticomán***án 600Delg.Gustavo A.MaderoC.P.07340Ciudad de México(CDMX)Mexico Instituto Politécnico Nacional(IPN) Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo(CIIEMAD)Calle 30 de Junio de 1520Barrio la Laguna TicománDel.Gustavo A.MaderoC.P.07340Ciudad de MéxicoMéxico

The present study aimed to evaluate multi-element concentrations(Al,As,Ca,Cd,Co,Cr,Cu,Fe,Mg,Mn,Mo,Ni,Pb,Sr)in suspended particulate material(SPM)collected from Ensenada de La Paz(ELP)lagoon,Baja California Sur,Mexico in two different periods(September and May)to comprehend their origin,geochemical behavior,mass transfer and associated ecotoxicological *** 24 hr variation coefficient of volumetric SPM levels were found to be 51.7%in September and 40.5%in May,signifying the effects of oceanic *** calculated enrichment factor(EF)values for all the studied elements were of higher magnitude because of the high surface area and oxide nature of SPM,and in this study,Mo had the highest EF of 46.77 probably due to its origin from continental *** the ecotoxicological perspective,the integrated toxic risk index revealed low toxic risk to the benthic ***,the mean-ERM-Quotient calculated using the particulate concentrations of As,Cd,Cr,Cu,Ni,Pb indicated 9%probability of toxicity to *** comprehensive geochemical and ecotoxicological assessment of particulate metal concentrations in the ELP lagoon signify low to moderate contamination.

关键词： Suspended particulate material Heavy metals Risk assessment Mass transfer Ensenada de La Paz

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A systematic review of climate change impacts,adaptation strategies,and policy development in West Africa

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Regional Sustainability 2024年第2期5卷 13-25页

作者： Camillus Abawiera WONGNAA Alex Amoah SEYRAM suresh babu Department of Agricultural Economics Agribusiness and ExtensionKwame Nkrumah University of Science and TechnologyKumasi00233Ghana International Food Policy Research Institute Washington20005USA

Climate change studies are diverse with no single study giving a comprehensive review of climate change impacts,adaptation strategies,and policy development in West *** unavailability of an all-inclusive study to serve as a guide for practitioners affects the effectiveness of climate change adaptation strategies proposed and adopted in the West African *** purpose of this study was to review the impacts of climate change risks on the crop,fishery,and livestock sectors,as well as the climate change adaptation strategies and climate-related policies aimed at helping to build resilient agricultural production systems in West *** review process followed a series of rigorous stages until the final selection of 56 articles published from 2009 to ***,the results highlighted the adverse effects of climate change risks on food *** found a continuous decline in food crop ***,the livestock sector experienced morbidity and mortality,as well as reduction in meat and milk *** fishery sector recorded loss of fingerlings,reduction in fish stocks,and destruction of mariculture and *** West Africa,climate-smart agriculture technologies,physical protection of fishing,and inclusion of gender perspectives in programs appear to be the major adaptation *** study therefore recommends the inclusion of ecosystem and biodiversity restoration,weather insurance,replacement of unsafe vessels,and strengthening gender equality in all climate change mitigation programs,as these will help to secure enough food for present and future generations.

关键词： Climate change Climate extreme events Food security Adaptation strategies Climate-smart agriculture West Africa

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Effect of carbon-doping on structural and dielectric properties of zinc oxide

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Journal of Advanced Dielectrics 2020年第4期10卷 61-67页

作者： MD.Parvez Ahmad A.Venkateswara Rao k.suresh babu G.Narsinga Rao Advanced Functional Materials Research Centre Department of Physics Koneru Lakshmaiah Education Foundation VaddeswaramGunturAndhra Pradesh 522502India Department of Humanities&Sciences Marri Laxman Reddy Institute of Technology and Management Hyderabad Telangana 500043India

In this paper,Carbon-doped Zinc Oxide(C-ZnO)samples were prepared using the solid-state reaction *** influence of carbon-doping on the structural and dielectric properties of ZnO samples was *** shift in the highest peak position(101)in XRD patterns of carbon-doped samples was *** Raman peak at 581 cm^(-1) in undoped ZnO was shifted and broadened in carbon-doped ZnO *** ZnO samples doped with carbon show higher values of dielectric constant(~2400 at 1 kHz)compared to pure ZnO(~9 at 1 kHz)which was due to increase in native point defects in the *** ac conductivity(σ_(ac))value of the carbon-doped sample was enhanced by 103 times for((ZnO)_(0.9) C_(0.1))sample.

关键词： Zinc oxide dielectric properties high dielectric permittivity AC conductivity

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Experimental Behavior of Recycled Aggregate Concrete Filled Steel Tubular Columns

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1414-1417页

作者： Thirumalai R suresh babu S Research Scholar-Full Time Dept.of Civil EngineeringKongu Engineering College PerunduraiErode 638060TamilnaduIndia Dept.of Civil Engineering Kongu Engineering College PerunduraiErode 638060TamilnaduIndia

During the modernization or rehabilitation activity,the demolished structural waste causes large soil pollution and unavailability of natural aggregate is the big concern for the construction ***,this manuscript deals with the Composite Steel Circular Column(CSCC)with Recycled Aggregate concrete(RAC)as infill is partly used,with the replacement of 25%and 50%in M30 grade of *** internal reinforcement steel is fully replaced by rolled steel tubes(circular and square)with varied thickness,ISA-unequal *** 14 specimens are cast and examined under axial load for analysis of the deflection characteristics,the load-bearing capacity along with its buckling *** experimental values are estimated through LVDT(linear variable differential transducer)at *** curve of load-deflection is drawn with the load *** the date interpretation,it is found column made of 50%-RAC has more than 25%-RAC.

关键词： composite steel circular column(CSCC) recycled aggregate concrete(RAC) ISAinternational standard angle LVDT(linear variable differential transducer)

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Improved Monarchy Butterfly Optimization Algorithm (IMBO): Intrusion Detection Using Mapreduce Framework Based Optimized ANU-Net

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Computers, Materials & Continua 2023年第6期75卷 5887-5909页

作者： kunda suresh babu Yamarthi Narasimha Rao School of Computer Science and Engineering VIT-AP UniversityAmaravathi522237Andhra PradeshIndia

The demand for cybersecurity is rising recently due to the rapid improvement of network *** a primary defense mechanism,an intrusion detection system(IDS)was anticipated to adapt and secure com-puting infrastructures from the constantly evolving,sophisticated threat ***,various deep learning methods have been put forth;however,these methods struggle to recognize all forms of assaults,especially infrequent attacks,because of network traffic imbalances and a shortage of aberrant traffic samples for model *** work introduces deep learning(DL)based Attention based Nested U-Net(ANU-Net)for intrusion detection to address these issues and enhance detection *** this IDS model,the first data preprocessing is carried out in three stages:duplication elimi-nation,label transformation,and data *** the features are extracted and selected based on the Improved Flower Pollination Algorithm(IFPA).The Improved Monarchy Butterfly Optimization Algorithm(IMBO),a new metaheuristic,is used to modify the hyper-parameters in ANU-Net,effectively increasing the learning rate for spatial-temporal information and resolving the imbalance *** the use of parallel programming,the MapReduce architecture reduces computation complexity while signifi-cantly accelerating *** publicly available data sets were used to evaluate and test the *** investigational outcomes suggest that the proposed technique can more efficiently boost the performances of IDS under the scenario of unbalanced *** proposed method achieves above 98%accuracy and classifies various attacks significantly well compared to other classifiers.

关键词： Intrusion detection system(IDS) attention based nested U-Net

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Ionic liquid electrolytes for sodium-ion batteries to control thermal runaway

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Journal of Energy Chemistry 2023年第6期81卷 321-338,I0008页

作者： keith Sirengo Aswathy babu Barry Brennan suresh C.Pillai Nanotechnology and Bio-Engineering Research Group Department of Environmental ScienceAtlantic Technological UniversityATU SligoAsh LaneSligo F91 YW50Ireland Health and Biomedical(HEAL)Strategic Research Centre Atlantic Technological UniversityATU SligoAsh LaneSligo F91 YW50Ireland

Sodium-ion batteries are expected to be more affordable for stationary applications than lithium-ion batteries,while still offering sufficient energy density and operational capacity to power a significant segment of the battery *** this,thermal runaway explosions associated with organic electrolytes have led to concerns regarding the safety of sodium-ion *** electrolytes,ionic liquids are promising because they have negligible vapor pressure and show high thermal and electrochemical *** review discusses the safety contributions of these electrolyte properties for high-temperature *** ionic liquids provide thermal stability while at the same time promoting high-voltage window battery ***,apart from cycle stability,there is an additional safety feature attributed to modified ultra-concentrated ionic liquid *** these contributions,the following have been discussed,heat sources and thermal runaway mechanisms,thermal stability,the electrochemical decomposition mechanism of stable cations,and the ionic transport mechanism of ultra-concentrated ionic liquid *** addition,the contributions of hybrid electrolyte systems consisting of ionic liquids with either organic carbonate or polymers are also *** thermal stability of ionic liquids is found to be the main contributor to cell safety and cycle *** high-temperature applications where electrolyte safety,capacity,and cycle stability are important,highly concentrated ionic liquid electrolyte systems are potential solutions for sodium-ion battery applications.

关键词： Thermal stability Ionic liquids Sodium-ion batteries Cycle stability Ionic conductivity

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Weibull Probability Model for Fracture Strength of Aluminium (1101)-Alumina Particle Reinforced Metal Matrix Composite

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Journal of Materials Science & Technology 2009年第3期25卷 341-343页

作者： A. suresh babu V. Jayabalan Department of Manufacturing Engineering Anna University

In recent times, conventional materials are replaced by metal matrix composites （MMCs） due to their high specific strength and modulus. Strength reliability, one of the key factors restricting wider use of composite materials in various applications, is commonly characterized by Weibull strength distribution function. In the present work, statistical analysis of the strength data of 15% volume alumina particle （mean size 15 um） reinforced in aluminum alloy （1101 grade alloy） fabricated by stir casting method was carried out using Weibull probability model. Twelve tension tests were performed according to ASTM B577 standards and the test data, the corresponding Weibull distribution was obtained. Finally the reliability of the composite behavior in terms of its fracture strength was presented to ensure the reliability of composites for suitable applications. An important implication of the present study is that the Weibull distribution describes the experimentally measured strength data more appropriately.

关键词： Weibull distribution Fracture strength Metal matrix composite

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Hybrid, Optimal, Intelligent and Classical PV MPPT Techniques: A Review

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CSEE Journal of Power and Energy Systems 2021年第1期7卷 9-33页

作者： Ratnakar babu Bollipo suresh Mikkili Praveen kumar Bonthagorla Department of Electrical and Electronics Engineering National Institute of Technology GoaFARMAGUDIPondaGoa 403401India

Renewable energy-based solar photovoltaic(PV)generation is the best alternative for conventional energy sources because of its natural abundance and environment friendly *** power extraction from the PV system plays a critical role in increasing the efficiency of the solar power generation during partial shading conditions(PSCs).Therefore,a suitable maximum power point tracking(MPPT)technique to track the maximum power point(MPP)is of high need,even under *** paper presents an organized and concise review of MPPT techniques implemented for the PV systems in literature along with recent publications on various hardware design *** classification is done into four categories,***,intelligent,optimal,and hybrid depending on the tracking algorithm utilized to track MPP under *** uniform insolation,classical methods are highly preferred as there is only one peak in the P-V ***,under PSCs,the F-V curve exhibits multiple peaks,one global maximum power point(GMPP)and remaining are local maximum power points(LMPP’s).Under the PSCs,classical methods fail to operate at GMPP and hence there is a need for more advanced MPPT *** MPPT technique has its advantages and limits,but a streamlined MPPT is drafted in numerous parameters like sensors required,hardware implementation,cost viability,tracking speed and tracking *** study provides the advancement in this area since some parameter comparison is made at the end of every classification,which might be a prominent base-rule for picking the most gainful sort of MPPT for further research.

关键词： GMPP MPPT classification MPPT techniques partial shading conditions(PSCs) photovoltaic system

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A review on perovskite solar cells (PSCs),materials and applications

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Journal of Materiomics 2021年第5期7卷 940-956页

作者： N.suresh kumar k.Chandra babu Naidu Department of Physics JNTUA College of EngineeringAnantapuramu515002A.PIndia Dept.of Physics GITAM Deemed to be UniversityBangalore562163KarnatakaIndia

In recent years,the perovskite solar cells have gained much attention because of their ever-increasing power conversion efficiency(PCE),simple solution fabrication process,flyable,light-weight wearable and deployable for ultra-lightweight space and low-cost materials constituents *** the last few years,the efficiency of perovskite solar cells has surpassed 25%due to high-quality perovskite-film accomplished through low-temperature synthesis techniques along with developing suitable interface and ***,the stability of perovskite solar cells has attracted much well-deserved *** this article we have focused on recent progress of the perovskite solar cells regarding their crystallinity,morphology and synthesis ***,demonstrated different layers such as electron transport-layers(ETLs),hole transport-layers(HTLs)and buffer-layers utilized in perovskite solar-cells,considering their band gap,carrier mobility,transmittance *** of various tin(Sn),carbon and polymer-based perovskite solar cells and their potential of commercialization feasibility has also been discussed.

关键词： Perovskite solar-cells Power conversion efficiency Hole transport layer Electron transport layer Buffer layer Photovoltaic devices

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Stability Indicating RP-UPLC Method for Quantification of Glycopyrrolate, Methylparaben and Propylparaben Assay in Liquid Oral Formulation

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American Journal of Analytical Chemistry 2022年第12期13卷 538-552页

作者： Sreenivas Pippalla Arjuna Rao Nekkalapudi suresh babu Jillellamudi Sikkim Professional University Gangtok India Asphar Research Labs Pvt. Ltd. Hyderabad India

Stability indicating RP-UPLC technique was developed for the simultaneous quantification of glycopyrrolate, methylparaben, and propylparaben in glycopyrrolate oral solution. The method was established by using gradient UPLC and a Waters Acquity UPLC BEH C18, 100 mm 2.1 mm, i.d 1.7 μm particle size column with a gradient program of mobile phase A and mobile phase B with a flow rate of 0.25 mL/minute, UV wavelength detection at 222 nm, column temperature of 40°C, injection volume of 2 μL, mobile phase A contains 0.05% trifluoro acetic acid in water and Acetonitrile (90:10) v/v and mobile phase-B contains 0.05% trifluoro acetic acid in water and Acetonitrile (10:90) v/v. The current research describes a single UPLC method for developing an assay method for Glycopyrrolate Oral solution that includes Glycopyrrolate (Active), Methylparaben (Preservative), and Propylparaben (Preservative). The assay method was validated in accordance with ICH guidelines. The retention times of glycopyrrolate, methyl paraben and propylparaben were 6.051 min, 3.458 min and 8.095 min, respectively. Linearity range of glycopyrrolate, methyl paraben and propylparaben were in the range of 4 - 32 μg per mL, 35 - 290 μg per mL and 4 - 32 μg per mL, respectively. Recovery of glycopyrrolate, methylparaben and propylparaben ranged from 100.1% to 98.9%, 100.2% - 100.8%, and 100.2% - 100.8%. Validation of analytical method demonstrated that the method is suitable, specific, linear, accurate, precise, rugged and stability indicating for estimating three components in the pharmaceutical dosage form.

关键词： Glycopyrrolate Oral Solution UPLC Assay Methylparaben Propylparaben

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