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Generation scenarios of.anodic structures and experimental realization of.turbulence in unmagnetized plasma

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Plasma Science and Technology 2020年第8期22卷 90-98页

作者： prince ALEX Suraj Kumar SINHA Departimento di f.sica G.Occhialini Universita degli studi di MilanoBicoccaI-20126Italy Department of.Physics Pondicherry UniversityKalapetPuducherry 605014India

In the present work,we report development of.a DC glow discharge plasma(GDP)set-up to study controlled evolution of.anodic structures having distinctive geometry,size and layers,generated in f.ont of.a positively biased electrode,submerged in unmagnetized *** such an anodic structure,we have also investigated the condition under which the turbulence is *** of.these structures,generated in f.ont of.a positively biased electrode,depends on multiple parameters such as the ratio of.anode to cathode size,electrode separation,gas pressure,biasing conf.guration such as anode bias,cathode bias and grounding *** attempted to classif. dif.erent anodic structures observed experimentally,as anode glow,f.reball,anode spot,double layer and multiple double layers(MDLs)based on its physical *** these structures the present investigation is f.cused on *** number of.layers,observed in MDLs varied f.om as high as six to as low as zero,by controlling the operating discharge parameters,*** were carried out using Langmuir *** analysis of.f.oating potential f.uctuations corresponds to a multiple anodic structure showed emergence of.turbulence,at its critical stage,satisf.ing condition f.r self.organized criticality(SOC).This was identif.ed with three slopes observed in the power spectrum,resembling the sand-pile ***,the GDP is completely dif.erent f.om that of.the magnetically conf.ned plasma,the nature of.turbulence observed with SOC,is very similar to that observed in the scrape of.layer of.f.sion ***,the present investigation could provide new approach to study turbulence of.similar nature,under an experimental condition that is f.ee f.om the complexities of.complicated f.eld geometries used in conf.nement devices.

关键词： glow discharge plasma anode structure multiple anodic double layer turbulence unmagnetized plasma f.reball

Valuable Beyond Vulnerable: A Scoping Review on the Contributions of.Older f.rced Migrants in Post-migration Recovery

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International Journal of.Disaster Risk Science 2024年第2期15卷 186-197页

作者： prince Chiagozie Ekoh Christine A.Walsh f.culty of.Social Work University of CalgaryCalgaryAB T2N 1N4Canada Department of.Social Work University of NigeriaNsukka 410001Nigeria

During times of.crisis, including pandemics, climate change, and f.rced migration, much of.the discourse in ageing research and intervention centers on the vulnerabilities of.older adults. Unf.rtunately, the valuable contributions of.older adults to post-disaster recovery and healing are of.en overlooked and undervalued. Our aim in this scoping review is to shed light on the critical contributions of.older f.rced migrants to post-migration recovery. We set the scene by introducing the two signif.cant global demographic changes of.the twenty-f.rst century: f.rced migration and ageing. We provide a discourse on older f.rced migrants, ageing in situations of.f.rced migration, and some of.the challenges f.ced by older f.rced migrants. We then present some of.the substantial roles of.older f.rced migrants in post-migration recovery, including building resilience, contributing to culture and language transf.r, providing emotional support, of.ering mentorship and leadership, participating in community building, and f.stering social integration. We close by highlighting some of.the lessons that can be drawn f.om understanding the unique roles played by older adults in post-f.rced migration recovery and the key actions necessary to promote these roles.

关键词： Older displaced persons Older f.rced migrants Older ref.gees Post-f.rced migration recovery

f.edback model of.secondary electron emission in DC gas discharge plasmas

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Plasma Science and Technology 2018年第2期20卷 128-133页

作者： Saravanan ARUMUGAM prince ALEX Suraj Kumar SINHA Department of.Physics Pondicherrry University

f.edback is said to exist in any amplif.er when the f.action of.output power in f.d back as an ***,in gaseous discharge ions that incident on the cathode act as a natural f.edback element to stabilize and self.sustain the *** present investigation is intended to emphasize the f.edback nature of.ions that emits secondary electrons（SEs）f.om the cathode surf.ce in DC gas *** average number of.SEs emitted per incident ion and non ionic species（energetic neutrals,metastables and photons）which results f.om ion is def.ned as ef.ective secondary electronemission coef.icient（ESEEC,Eg）.In this study,we derive an analytic expression that corroborates the relation betweenEg and power inf.ux by ion to the cathode based on the f.edback theory of.an *** addition,experimentally,we conf.rmed the typical positive f.edback nature of.SEEf.om the cathode in argon DC glow *** experiment is done f.r three dif.erent cathode material of.same dimension（tungsten（W）,copper（Cu）and brass）under identical discharge conditions（pressure：0.45 mbar,cathode bias：-600 V,discharge gab：15 cm and operating gas：argon）.f.rther,we f.und that theEg value of.these cathode material controls the amount of.f.edback power given by *** dif.erence in f.edback leads dif.erent f.nal output i.e the power carried by ion at cathode（Pi C￠∣）.The experimentally obtained value of.Pi C￠∣is 4.28 W,6.87 W and9.26 W respectively f.r W,Cu and *** addition,the present investigation reveals that the amount of.f.edback power in a DC gas discharges not only af.ect the f.action of.power f.d back to the cathode but also the entire characteristics of.the discharge.

关键词： f.edback secondary electron emission DC gas discharges power inf.ux by ion at cathode cathode temperature

Adaptive Error Curve Learning Ensemble Model f.r Improving Energy Consumption f.recasting

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Computers, Materials & Continua 2021年第11期69卷 1893-1913页

作者： prince Waqas Khan Yung-Cheol Byun Department of.Computer Engineering Jeju National UniversityJeju-siKorea

Despite the advancement within the last decades in the f.eld of.smart grids,energy consumption f.recasting utilizing the metrological f.atures is still *** paper proposes a genetic algorithm-based adaptive error curve learning ensemble(GA-ECLE)*** proposed technique copes with the stochastic variations of.improving energy consumption f.recasting using a machine learning-based ensembled approach.A modif.ed ensemble model based on a utilizing error of.model as a f.ature is used to improve the f.recast *** approach combines three models,namely CatBoost(CB),Gradient Boost(GB),and Multilayer Perceptron(MLP).The ensembled CB-GB-MLP model’s inner mechanism consists of.generating a meta-data f.om Gradient Boosting and CatBoost models to compute the f.nal predictions using the Multilayer Perceptron network.A genetic algorithm is used to obtain the optimal f.atures to be used f.r the *** prove the proposed model’s ef.ectiveness,we have used a f.ur-phase technique using Jeju island’s real energy consumption *** the f.rst phase,we have obtained the results by applying the CB-GB-MLP *** the second phase,we have utilized a GA-ensembled model with optimal *** third phase is f.r the comparison of.the energy f.recasting result with the proposed ECL-based *** f.urth stage is the f.nal stage,where we have applied the GA-ECLE *** obtained a mean absolute error of.3.05,and a root mean square error of.*** experimental results are provided,demonstrating the superiority of.the proposed GA-ECLE model over traditional ensemble models.

关键词： Energy consumption meteorological f.atures error curve learning ensemble model energy f.recasting gradient boost catboost multilayer perceptron genetic algorithm

Nrf. as a potential target f.r the treatment of.epilepsy

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Neural Regeneration Research 2024年第9期19卷 1865-1866页

作者： prince Kumar Singh Tawf.eq Shekh-Ahmad Institute f.r Drug Research School of PharmacyFaculty of MedicineThe Hebrew University of JerusalemJerusalemIsrael

Epilepsy is a prevalent chronic brain disorder that is characterized by a persistent predisposition to recurrently generate epileptic seizures and is of.en associated with cognitive and psychological *** af.ects approximately 65 million individuals,including both males and f.males of.all ages worldwide,and poses a signif.cant burden on patients,their f.milies,and the health system(Vezzani et al.,2019).

关键词： epilepsy Nrf.

Molecular mechanisms underpinning sarcomas and implications f.r current and f.ture therapy

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Signal Transduction and Targeted Therapy 2021年第7期6卷 2135-2153页

作者： Victoria Damerell Michael SPepper Sharon prince Division of.Cell Biology Department of Human BiologyFaculty of Health SciencesUniversity of Cape TownObservatoryCape TownSouth Africa lnstitute f.r Cellular and Molecular Medicine Department of ImmunologySAMRC Extramural Unit for Stem Research and TherapyFaculty of Health SciencesUniversity of PretoriaPretoriaSouth Africa

Sarcomas are complex mesenchymal neoplasms with a poor *** clinical management is highly challenging due to their heterogeneity and insensitivity to current *** there have been advances in understanding specif.c genomic alterations and genetic mutations driving sarcomagenesis,the underlying molecular mechanisms,which are likely to be unique f.r each sarcoma subtype,are not f.lly *** is in part due to a lack of.consensus on the cells of.origin,but there is now mounting evidence that they originate f.om mesenchymal stromal/stem cells(MSCs).To identif. novel treatment strategies f.r sarcomas,research in recent years has adopted a mechanism-based search f.r molecular markers f.r targeted therapy which has included recapitulating sarcomagenesis using in vitro and in vivo MSC *** review provides a comprehensive up to date overview of.the molecular mechanisms that underpin sarcomagenesis,the contribution of.MSCs to modelling sarcomagenesis in vivo,as well as novel topics such as the role of.epithelial-to-mesenchymal-transition(EMT)/mesenchymal-to-epithelial-transition(MET)plasticity,exosomes,and microRNAs in *** also reviews current therapeutic options including ongoing pre-clinical and clinical studies f.r targeted sarcoma therapy and discusses new therapeutic avenues such as targeting recently identif.ed molecular pathways and key transcription f.ctors.

关键词： sarcoma neoplasms alterations

An Imbalanced Dataset and Class Overlapping Classif.cation Model f.r Big Data

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Computer Systems Science & Engineering 2023年第2期44卷 1009-1024页

作者： Mini prince P.M.Joe Prathap Department of.Inf.rmation Technology St.Peter’s College of Engineering and TechnologyChennai600054TamilnaduIndia Department of.Inf.rmation Technology R.M.D Engineering CollegeChennai601206TamilnaduIndia

Most modern technologies,such as social media,smart cities,and the internet of.things(IoT),rely on big *** big data is used in the real-world applications,two data challenges such as class overlap and class imbalance *** dealing with large datasets,most traditional classiﬁers are stuck in the local optimum *** a result,it’s necessary to look into new methods f.r dealing with large data *** solutions have been proposed f.r overcoming this *** rapid growth of.the available data threatens to limit the usef.lness of.many traditional *** such as oversampling and undersampling have shown great promises in addressing the issues of.class *** all of.these techniques,Synthetic Minority Oversampling TechniquE(SMOTE)has produced the best results by generating synthetic samples f.r the minority class in creating a balanced *** issue is that their practical applicability is restricted to problems involving tens of.thousands or lower instances of.*** this paper,we have proposed a parallel mode method using SMOTE and MapReduce strategy,this distributes the operation of.the algorithm among a group of.computational nodes f.r addressing the af.rementioned *** proposed solution has been divided into three ***ﬁrst stage involves the process of.splitting the data into dif.erent blocks using a mapping f.nction,f.llowed by a pre-processing step f.r each mapping block that employs a hybrid SMOTE algo-rithm f.r solving the class imbalanced *** each map block,a decision tree model would be ***,the decision tree blocks would be com-bined f.r creating a classiﬁcation *** have used numerous datasets with up to 4 million instances in our experiments f.r testing the proposed scheme’s *** a result,the Hybrid SMOTE appears to have good scalability within the f.amework proposed,and it also cuts down the processing time.

关键词： Imbalanced dataset class overlapping SMOTE MapReduce parallel programming oversampling

A Study of.Gaugeon f.rmalism f.r QED in Lorentz Violating Background

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Communications in Theoretical Physics 2018年第2期69卷 166-172页

作者： Mushtaq B.Shah prince A.Ganai Department of.Physics National Institute of Technology

At the energy regimes close to Planck scales, the usual structure of.Lorentz symmetry f.ils to address certain f.ndamental issues and eventually breaks down, thus paving the way f.r an alternative road map. It is thus argued that some subgroup of.proper Lorentz group could stand consistent and might possibly help us to circumvent this *** is this subgroup that goes by the name of.Very Special Relativity(VSR). Apart f.om violating rotational symmetry,VSR is believed to preserve the very tenets of.special relativity. The gaugeon f.rmalism due to type-I Yokoyama and type-II Izawa are f.und to be invariant under BRST symmetry. In this paper, we analyze the scope of.this invariance in the scheme of.VSR. f.rthermore, we will obtain VSR modif.ed Lagrangian density using path integral derivation. We will explore the consistency of.VSR with regard to these theories.

关键词： quantum electrodynamics very special relativity BRST symmetry gaugeon f.rmalism

Computational catalysis on the conversion of.CO_(2) to methane—an update

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f.ontiers of.Chemical Science and Engineering 2024年第11期18卷 291-333页

作者： prince Joby Yesaiyan Manojkumar Antony Rajendran Rajadurai Vijay Solomon Department of.Chemistry Madras Christian College(Autonomous)(Affiliated to the University of Madras)Chennai 600059“Tamil Nadu”India Department of.Chemistry Bishop Heber CollegeTiruchirappalli 620017“Tamil Nadu”India Department of.Chemistry Mepco Schlenk Engineering College(Autonomous)Sivakasi 626005“Tamil Nadu”India

The reliance on f.ssil f.els intensif.es CO_(2) emissions,worsening political and environmental ***_(2) capture and conversion present a promising solution,inf.uenced by industrialization and *** recent times,catalytic conversion of.CO_(2) into f.els and chemical precursors,particularly methane,are gaining traction f.r establishing a sustainable,carbon-neutral economy due to methane’s advantages in renewable energy *** homogeneous and heterogeneous catalysts are available f.r the conversion of.CO_(2) to methane,the ef.iciency is f.und to be higher in heterogeneous ***,this review f.cuses only on the heterogeneous *** this context,the ef.icient heterogeneous catalysts with optimum utility are yet to be ***,the quest f.r suitable catalyst f.r the catalytic conversion of.CO_(2) to CH4 is still continuing and designing ef.icient catalysts requires assessing their synthetic f.asibility,of.en achieved through computational methods like density f.nctional theory simulations,providing insights into reaction mechanisms,rate-limiting steps,catalytic cycle,activation of.C=O bonds and enhancing understanding while lowering *** this context,this review examines the conversion of.CO_(2) to CH4 using seven distinct types of.catalysts,including single and double atom catalysts,metal organic f.ameworks,metalloporphyrins,graphdiyne and graphitic carbon nitrite and alloys with some case *** main f.cus of.this review is to of.er a detailed and extensive examination of.diverse catalyst design approaches and their utilization in CH4 production,with a specif.c emphasis on computational *** explores the array of.design methodologies used to identif. reaction pathways and investigates the critical role of.computational tools in their ref.nement and *** believe this review will help budding researchers to explore the possibilities of.designing catalysts f.r the CO_(2) to CH4 conversio

关键词： computational catalysis single atom catalyst CO_(2)reduction metalloporphyrins double-atom catalyst graphitic carbon nitrite