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A Delay-dependent Dynamic Wide Area Damping Controller for Renewable Energy Integrated Power System Resilient to Communication Failure

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 577-588页

作者： Anirban Sengupta Dushmanta Kumar das Bidyadhar Subudhi Department of Electrical and Electronics Engineering Sikkim Manipal Institute of TechnologySMUSIkkim737136 India Department of Electrical and Electronics Engineering National Institute of TechnologyNagalandDimapur797103 India School of Electrical Science Indian Institute of TechnologyGoaIndia

Integration of renewable energy sources(RES)with a conventional power system has a detrimental effect on interarea *** popular RESs are solar photovoltaic(PV)and wind energy conversion systems(WECS).Both solar PV power generation and WECS are integrated with power systems using a power electronic *** the amount of RES generation lead towards reduction of system damping,which leads towards inter-area ***,the intermittent behavior of a RES reduces the effectiveness of damping controllers.A dynamic controller based wide area damping controller(WADC)is proposed in this paper to increase small signal stability of a RES integrated power *** WADC is designed for contemplating delay in a communication channel,communication failure and *** anti-windup compensator is developed to overcome the effect of actuator ***,the gain of the anti-windup compensator is calculated using LyapunovKrasovskii functional(LKF)in terms of linear matrix inequality(LMI).The actuator considered in this paper is a unified power flow controller(UPFC).Efficacy of PV and wind power integration on power system is also *** efficacy of the developed dynamic controller is verified using IEEE 39 bus and 68 bus power system.

关键词： Actuator saturation communication failure linear matrix inequality renewable energy sources time delay wide area damping control

Powder mixed electrochemical discharge process for micro machining of C103 niobium alloy

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Defence Technology（防务技术） 2023年第8期26卷 84-101页

作者： Niladri Mandal Nitesh Kumar Alok Kumar das Defence Research&Development Laboratory(DRDL)-DRDO HyderabadIndia Department of Mechanical Engineering Indian Institute of Technology(ISM)DhanbadIndia

This work demonstrates the viability of the powder-mixed micro-electrochemical discharge machining(PMECDM) process to fabricate micro-holes on C103 niobium-based alloy for high temperature *** processes are involved simultaneously *** erosion,chemical etching,and abrasive grinding for removal of material while the classical electrochemical discharge machining process involves double actions *** erosion,and chemical *** powder-mixed electrolyte process resulted in rapid material removal along with a better surface finish as compared to the classical microelectrochemical discharge machining(MECDM).Further,the results are optimized through a multiobjective optimization approach and study of the surface topography of the hole wall surface obtained at optimized *** the selected range of experimental parameters,PMECDM shows a higher material removal rate(MRR) and lower surface roughness(R_(a))(MRR:2.8 mg/min and R_(a) of 0.61 μm) as compared to the MECDM process(MRR:2.01 mg/min and corresponding Raof 1.11 μm).A detailed analysis of the results is presented in this paper.

关键词： Micro-electrochemical discharge machining C103 niobium alloy Surface integrity Material removal rate Hybrid powder mixed ECDM

MXene-based nanomaterials as adsorbents for wastewater treatment:a review on recent trends

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Frontiers of Materials Science 2022年第1期16卷 55-70页

作者： Rajesh K.JENA Himadri Tanaya das Braja N.PATRA Nigamananda das Centre of Excellence in Advanced Materials and Applications Utkal UniversityVani ViharBhubaneswar 751004India Department of Chemistry Utkal UniversityVani ViharBhubaneswar 751004India

The wastewater treatment is a challenging research area to reduce the increasing pressure on limited fresh water *** several techniques adopted and practiced,adsorption is one of the most effective and sustainable ecofriendly *** recent years,MXene nanomaterials,a new family of transition metal carbides,have gained increasing attention as the potential adsorbent for pollutants due to their unique features such as large surface area with abundant active sites and hydrophilicity.A wide range of pollutants *** metal ions,organic dyes,radionuclides,and toxic gas molecules have been sensed by 2D *** inclusive understanding on the adsorptive behavior of MXene-based materials is needed to explain the removal mechanism and effects of different adsorption *** review gives a general overview on recent research progress on MXene materials with special reference to their applications for the adsorptive removal of different *** general trends in the synthesis of MXenes,their stability and different factors affecting the adsorption process along with the main challenges in understanding the full potential of MXenes for environmental applications are discussed.

关键词： MXene adsorption wastewater treatment heavy metal radionuclide

Violence study of healthcare workers and systems in the Caribbean:ViSHWaS-Caribbean study

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World Journal of Methodology 2024年第3期14卷 106-118页

作者： Reshon Hadmon Daniella Myriam Pierre Akshat Banga Jacques W Clerville Hans Mautong Precious Akinsanya Rajat das Gupta Sama Soliman Tolupe M Hunjah Bamidele A Hunjah Hafeez Hamza Ruman Khurshid Qasba Faisal A Nawaz Salim Surani Rahul Kashyap Department of Medicine St.George University School of MedicineGrenada FZ818West Indies Department of Research Global Remote Research Scholar ProgramSt PaulMN 55101United States Department of Public Health Cuny Graduate School of Public Health and Health PolicyNew YorkNY 10027United States Department of Internal Medicine Sawai Man Singh Medical CollegeJaipur 302004India School of Public Health Georgia State UniversityAtlantaGA 30302United States Department of Sociology and Demography School of HealthUniversidad de Especialidades Espiritu SantoSamborondon 092301Ecuador Department of Medicine Holy Name Medical CenterTeaneckNJ 07666United States Department of Epidemiology and Biostatistics University of South CarolinaColumbiaSC 29208United States Department of Medicine Pavlov First State Medical University of St PetersburgSankt-Peterburg 197022Russia Department of Medicine University of SuffolkIpswich IP41QJUnited Kingdom Department of Medicine Unicaf University of ZambiaLusaka 20842Zambia Department of Pharmacy School of PharmacyGirne 99428Cyprus Department of Medicine Sher-i-KashmirInstitute of Medical ScienceSrinagar 190011India Department of Psychiatry Al Amal Psychiatric HospitalEmirates Health ServicesDubaiUnited Arab Emirates Department of Medicine and Pharmacology Texas A and M UniversityCollege StationTX 77843United States Anesthesiology and Critical Care Mayo ClinicRochesterMN 55905United States Department of Research Wellspan HealthYorkPA 17403United States

BACKGROUND Violence against healthcare workers(HCWs)in the Caribbean continues to prevail yet remains *** aim is to determine the cause,traits,and consequences of violence on HCWs in the *** To determine the cause,traits,and consequences of violence on HCWs in the *** This research adopted an online cross-sectional survey approach,spanning over eight weeks(between June 6th and August 9th,2022).The survey was generated using Research Electronic Data Capture forms and followed a snowballing strategy to contact individuals using emails,social media,text messages,*** regression analysis was performed to evaluate the variables that influence violence,including gender,age,years of experience,institution type,and night shift *** The survey was completed by 225 *** comprised 61%.Over 51%of respondents belonged to the 21 to 35 age ***(n=61),Haiti(n=50),and Grenada(n=31)had the most *** HCWs(49%)worked for government academic institutions,followed by community hospitals(23%).Medical students(32%),followed by attending physicians(22%),and others(16%)comprised the most common cadre of *** 39%of the participants reported experiencing violence themselves,and 18%reported violence against colleague(s).Verbal violence(48%),emotional abuse(24%),and physical misconduct(14%)were the most common types of *** 63%of respondents identified patients or their relatives as the most frequent *** logistic regression analyses demonstrated that female gender(OR=2.08;95%CI:1.16-3.76,P=0.014)and higher frequency of night shifts(OR=2.22;95%CI:1.08-4.58,P=0.030)were associated with significantly higher odds of experiencing *** than 50%of HCWs felt less motivated and had decreased job satisfaction post-violent *** A large proportion of HCWS in the Caribbean are exposed to violence,yet the phenomenon remains *** a result,HCWs’job s

关键词： ViSHWaS Healthcare workers Violence Survey Workplace violence Caribbean Cross-sectional study

A perspective on biochar for repairing damages in the soil-plant system caused by climate change-driven extreme weather events

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Biochar 2022年第1期4卷 817-839页

作者： abhishek Kumar Tanushree Bhattacharya Santanu Mukherjee Binoy Sarkar Department of Civil and Environmental Engineering Birla Institute of TechnologyMesraRanchi 835215JharkhandIndia School of Agriculture Shoolini University of Biotechnology and Management SciencesSolan 173229India Lancaster Environment Centre Lancaster UniversityLancaster LA14YQUK

There has been more than 75%rise in the number of extreme weather events such as drought and flood during 2000-2019 compared to 1980-1999 due to the adverse effects of climate change,causing significant deterioration of the soil and water ***,the growing human population has been exerting pressure on available water and soil resources due to overuse or unplanned *** greenhouse gas emissions have intensified,the fertility of agricultural soils has declined globally due to the exposure of soils to frequent flooding,desertification,and salinization(resulting from extreme weather events).The current review aims to give an overview of damages caused to the soil-plant system by extreme weather events and provide a perspective on how biochar can repair the damaged *** is known to improve soil fertility,increase crop productivity and mitigate greenhouse gas emissions via sustainable recycling of *** properties of biochar such as alkaline pH,high cation exchange capacity,abundant surface functional groups,remarkable surface area,adequate porosity,excellent water holding capacity,and sufficient nutrient retention capacity can help repair the adverse effects of extreme weather events in the soil-plant *** paper recommends some cautious future approaches that can propel biochar’s use in improving the soil-plant systems and promoting sustainable functioning of extreme weather-affected areas via mitigation of the adverse effects.

关键词： Biochar Climate change Drought Flood Salinization Temperature rise

A deep-reinforcement learning approach for optimizing homogeneous droplet routing in digital microfluidic biochips

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Nanotechnology and Precision Engineering 2023年第2期6卷 1-12页

作者： Basudev Saha Bidyut das Mukta Majumder Department of Computer Science and Technology University of North BengalDarjeeling 734013India Department of Information Technology Haldia Institute of TechnologyHaldia 721657India

Over the past two decades,digital microfluidic biochips have been in much demand for safety-critical and biomedical applications and increasingly important in point-of-care analysis,drug discovery,and immunoassays,among other ***,for complex bioassays,finding routes for the transportation of droplets in an electrowetting-on-dielectric digital biochip while maintaining their discreteness is a challenging *** this study,we propose a deep reinforcement learning-based droplet routing technique for digital microfluidic *** technique is implemented on a distributed architecture to optimize the possible paths for predefined source–target pairs of *** actors of the technique calculate the possible routes of the source–target pairs and store the experience in a replay buffer,and the learner fetches the experiences and updates the routing *** proposed algorithm was applied to benchmark suitesⅠand Ⅲ as two different test benches,and it achieved significant improvements over state-of-the-art techniques.

关键词： Digital microfluidics Biochip Droplet routing Fluidic constraints Deep learning Reinforcement learning

Composition of treatment alliance in bipolar disorder: A cross-sectional study of patients' perspectives

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World Journal of Psychiatry 2022年第6期12卷 814-826页

作者： Rajeet Kumar Subho Chakrabarti abhishek Ghosh Department of Psychiatry Postgraduate Institute of Medical Education and ResearchChandigarh 160012India

BACKGROUND Treatment alliance has an impact on several key patient outcomes in all psychiatric disorders,including bipolar disorder(BD).It has been suggested that the construct of treatment alliance is different among patients from routine psychiatric settings compared to psychotherapeutic ***,research on the composition of treatment alliance in psychiatric disorders,such as BD,is relatively *** To determine whether a broader construct of treatment alliance was prevalent among outpatients with *** This is a cross-sectional study,conducted in the psychiatric unit of a multispecialty hospital in north India over 12 mo(September 2018 to September 2019).A consecutive sample of 160 remitted adult outpatients with BD on mood stabilizers for at least a year were *** principal instrument to assess treatment alliance was the Working Alliance Inventory-client version(WAIClient).Other potential constituents of the alliance explored were perceived trust in clinicians assessed by the Trust in Physicians(TRIP)scale,perceived support from clinicians assessed by the Psychosocial Care by Physicians(PCP)scale,and perceived treatment satisfaction assessed by the Patient Satisfaction Questionnaire(PSQ).Associations between scores on all scales were determined by correlational and multiple regression *** factor analysis of combined items of all scales was conducted using a principal components *** Scores on all the three WAI-Client subscales were significantly correlated with each other(r=0.66-0.81;P<0.0001).The total TRIP scores were associated with the total WAI-Client scores(r=0.28;P<0.01).The total TRIP scores and the total PCP scores were also significantly associated with the WAI-Client scores on the Task subscale(r=0.28-0.29;P<0.01).The total TRIP scores were significantly associated with the total PSQ scores(r=0.45;P<0.0001).Factor analysis yielded two independent and coherent factors,which explained 69%of the va

关键词： Treatment alliance Bipolar disorder Composition Factor-analysis

Identification of parameter to assess cracking resistance of asphalt mixtures subjected to aging and moisture conditioning

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第2期9卷 293-304页

作者： Bhaskar Pratim das Anjan Kumar Siddagangaiah Department of Civil Engineering Indian Institute of Technology GuwahatiGuiuahati 781039India

This study comprehensively evaluated different parameters based on tensile strength testing to assess the cracking resistance of asphalt mixtures subjected to aging and moisture *** this purpose,two sources of aggregates were selected to produce hot and warm mix asphalt *** mixtures were subjected to short term and long term aging,three levels of moisture conditioning(freeze thaw cycles),and tested at two temperatures(15℃and 25℃).The load-displacement data was used to determine the fracture work density,fracture energy,toughness index,cracking resistance index,cracking tolerance index,and rate dependent cracking *** was noticed that moisture conditioning increased the variability of the different *** cracking tolerance index and rate dependent cracking index parameter had a much higher coefficient of variation(Co V)with a maximum value close to 50%.Indirect tensile strength,fracture energy,and fracture work density appropriately captured the effect of moisture on cracking resistance of *** cracking resistance index,cracking tolerance index,and rate dependent cracking index increased with an increase in the moisture conditioning *** Statistical analysis showed that tensile strength,fracture work density,and fracture energy were significantly influenced by different aging and moisture conditions *** energy showed better association with fatigue life of asphalt mixtures subjected to three freeze-thaw cycles compared to tensile ***,the fatigue life prediction models showed that both indirect tensile strength and fracture energy significantly influence the fatigue life of asphalt mixtures subjected to aging and moisture conditioning.

关键词： Cracking resistance Aging Moisture Warm mix additive Fatigue life

Organic bulk heterojunction enabled with nanocapsules of hydrate vanadium pentaoxide layer for high responsivity self-powered photodetector

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Journal of Semiconductors 2022年第9期43卷 39-45页

作者： Hemraj Dahiya Anupam Agrawal Ganesh D.Sharma abhishek Kumar Singh The LNM Institute of Information Technology Department of PhysicsJaipurRajasthan 302031India Bhilai Institute of Technology DurgChhattisgarh491001India Rajiv Gandhi Institute of Petroleum Technology Department of Electronics EngineeringAmethiU.P.229304India

This article demonstrates the fabrication of organic-based devices using a low-cost solution-processable technique.A blended heterojunction of chlorine substituted 2D-conjugated polymer PBDB-T-2Cl,and PC71BM supported nanocapsules hy-drate vanadium penta oxides(HVO)as hole transport layer(HTL)based photodetector fabricated on an ITO coated glass sub-strate under ambient *** device forms an excellent organic junction diode with a good rectification ratio of~*** device has also shown excellent photodetection properties under photoconductive mode(at reverse bias)and zero bias for green light wavelength.A very high responsivity of~6500 mA/W and high external quantum efficiency(EQE)of 1400%have been reported in the *** proposed organic photodetector exhibits an excellent response and recovery time of~30 and~40 ms,respectively.

关键词： self-powered detector green light sensor HVO PBDB-T-2Cl detector processable solution sensor