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Improved lifestyle is associated with improved depression,anxiety and wellbeing over time in UK healthcare professionals during the COVID-19 pandemic:insights from the CoPE-HCP cohort study

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General Psychiatry 2023年第1期36卷 19-27页

作者： Mohammed Y Khanji George Collett Thomas Godec Carmela Maniero Sher May Ng Imrana Siddiqui Jaya Gupta vikas kapil Ajay Gupta William Harvey Research Institute Queen Mary University of LondonLondonUK Department of Cardiology Barts Heart CentreSaint Bartholomew's HospitalBarts Health NHS TrustLondonUK Newham University Hospital Barts Health NHS TrustLondonUK Wellbeing Hub Newham Training HubLondonUK NHS North East London CCG LondonUK Child and Adolescent Mental Health Service South West London and St George's Mental Health NHS TrustLondonUK

Background One potential modifiable factor to improve the mental health of healthcare professionals(HCPs)during the pandemic is *** This study aimed to assess whether an improved lifestyle during the pandemic is associated with improved mental health symptoms and mental well-being in HCPs over *** This was a cohort study involving an online survey distributed at two separate time points during the pandemic(baseline(July–September 2020)and follow-up(December 2020–March 2021))to HCPs working in primary or secondary care in the *** surveys assessed for major depressive disorder(MDD)(Patient Health Questionnaire-9(PHQ-9)),generalised anxiety disorder(GAD)(Generalised Anxiety Disorder-7(GAD-7)),mental well-being(Short Warwick-Edinburgh Mental Well-being Score(SWEMWBS))and self-reported lifestyle change(compared with the start of the pandemic)on multiple *** scores were calculated to estimate overall lifestyle change compared with that before the pandemic(at both baseline and follow-up).At each time point,separate logistic regression models were constructed to relate the lifestyle change score with the presence of MDD,GAD and low mental *** regression models were also developed relating the change in lifestyle scores from baseline to follow-up to changes in PHQ-9,GAD-7 and SWEMWBS *** 613 HCPs completed both baseline assessment and follow-up *** significant cross-sectional associations between increased lifestyle change scores and a reduced risk of MDD,GAD and low mental well-being were observed at both baseline and *** the study period,a whole unit increase in the change in novel scores(ie,improved overall lifestyle)over 4 months was inversely associated with changes in PHQ-9(adjusted coefficient:−0.51,95%confidence interval(CI):−0.73 to−0.30,p<0.001)and GAD-7 scores(adjusted coefficient:−0.32,95%CI:−0.53 to−0.10,p=0.004)and positively associated with the change in SWEMWBS scores

关键词： Edinburgh lifestyle coefficient

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Data-Driven Healthcare:The Role of Computational Methods in Medical Innovation

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 1-48页

作者： Hariharasakthisudhan Ponnarengan Sivakumar Rajendran vikas Khalkar Gunapriya Devarajan Logesh Kamaraj Department of Mechanical Engineering Dr.Mahalingam College of Engineering and TechnologyPollachiCoimbatoreTamil Nadu642003India Department of Mechanical Engineering JKKN College of Engineering and TechnologyKumarapalayamNamakkalTamil Nadu637209India Department of Mechanical Engineering Gharda Institute of TechnologyLavelMaharashtra415708India Department of Electrical and Electronics Engineering Sri Eshwar College of EngineeringCoimbatoreTamilnadu641202India Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyChennai600062India

The purpose of this review is to explore the intersection of computational engineering and biomedical science,highlighting the transformative potential this convergence holds for innovation in healthcare and medical *** review covers key topics such as computational modelling,bioinformatics,machine learning in medical diagnostics,and the integration of wearable technology for real-time health *** findings indicate that computational models have significantly enhanced the understanding of complex biological systems,while machine learning algorithms have improved the accuracy of disease prediction and *** synergy between bioinformatics and computational techniques has led to breakthroughs in personalized medicine,enabling more precise treatment ***,the integration of wearable devices with advanced computational methods has opened new avenues for continuous health monitoring and early disease *** review emphasizes the need for interdisciplinary collaboration to further advance this *** research should focus on developing more robust and scalable computational models,enhancing data integration techniques,and addressing ethical considerations related to data privacy and *** fostering innovation at the intersection of these disciplines,the potential to revolutionize healthcare delivery and outcomes becomes increasingly attainable.

关键词： Computational models biomedical engineering bioinformatics machine learning wearable technology

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Structural-Nanomechanical Property Correlation of Shallow Water Shrimp （Pandalus platyceros） Exoskeleton at Elevated Temperature

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Journal of Bionic Engineering 2014年第3期11卷 360-370页

作者： Devendra Verma vikas Tomar School of Aeronautics and Astronautics Purdue University West Lafayette IN 47907 USA

This investigation reports the nanomechanical properties of shallow water shrimp exoskeleton at temperatures ranging from 30 ℃ to 80 ℃ measured using nanoindentation experiments. Scanning Electron Microscopy （SEM） measurements suggest that the shrimp exoskeleton has the Bouligand structure in its layers, a key characteristic of the crustaceans. The thickness of the layers and packing density are found to be different from that of lobsters and crabs reported earlier in the literature. Mechanical properties at high temperatures are determined using micro materials nanoindentation test set up combined with the hot stage. The properties measured during nanoindentation test are corrected for the creep and thermal drift during the experiments. The reduced modulus values are found to be around 28 GPa at 30 ℃ that reduces to approximately 24 GPa at 80 ℃. The hardness values also decrease from 1.6 GPa at 30 ℃ to around 1.2 GPa at 80 ℃. The indentation size effect is found to be absent at all temperatures. Creep mechanisms of polymers like materials and its temperature dependence are discussed to give more insight into the deformation mechanism.

关键词： fresh water shrimp nanomechanics temperature dependence creep mechanism

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Emulsification of Indian heavy crude oil using a novel surfactant for pipeline transportation

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Petroleum Science 2017年第2期14卷 372-382页

作者： Shailesh Kumar vikas Mahto Department of Petroleum Engineering Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand India

The most economical way to overcome flow assurance problems associated with transportation of heavy crude oil through offshore pipelines is by emulsifying it with water in the presence of a suitable *** this research,a novel surfactant,tri-triethanolamine monosunflower ester,was synthesized in the laboratory by extracting fatty acids present in sunflower（Helianthus annuus）*** surfactant was used to prepare oil-in-water emulsions of a heavy crude oil from the western oil field of *** emulsification,a dramatic decrease in pour point as well as viscosity was *** the prepared emulsions were found to be flowing even at 1°*** emulsion developed with 60%oil content and 2wt%surfactant showed a decrease in viscosity of 96%.The stability of the emulsion was investigated at different temperatures,and it was found to be highly *** effectiveness of surfactant in emulsifying the heavy oil in water was investigated by measuring the equilibrium interfacial tension（IFT）between the crude oil（diluted）and the aqueous phase along with zeta potential of emulsions.2wt%surfactant decreased IFT by almost nine times that of no *** results suggested that the synthesized surfactant may be used to prepare a stable oil-in-water emulsion for its transportation through offshore pipelines efficiently.

关键词： Heavy crude oil Oil-in-water emulsion Pipeline transportation Sunflower oil Rheology Stability

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Microstructural analysis and hot corrosion behavior of HVOF-sprayed Ni–22Cr–10Al–1Y and Ni–22Cr–10Al–1Y–SiC(N) coatings on ASTM-SA213-T22 steel

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International Journal of Minerals,Metallurgy and Materials 2020年第3期27卷 401-416页

作者： Gurmail Singh Niraj Bala vikas Chawla Department of Mechanical Engineering IKGPTUJalandhar 144603PunjabIndia Department of Aerospace Engineering Chandigarh UniversityGharuan 140413PunjabIndia Department of Mechanical Engineering BBSBECFatehgarh Sahib 140407PunjabIndia

The present paper deals with the investigation of microstructure and high-temperature hot corrosion behavior of high-velocity oxy fuel(HVOF)-produced coatings. Two powder coating compositions, namely, Ni22Cr10Al1Y alloy powder and Ni22Cr10Al1Y(80 wt%;microsized)–silicon carbide(SiC)(20 wt%;nano(N)) powder, were deposited on a T-22 boiler tube steel. The hot corrosion behavior of bare and coated steels was tested at 900°C for 50 cycles in Na2SO4–60 wt%V2O5 molten-salt environment. The kinetics of corrosion was established with weight change measurements after each cycle. The microporosity and microhardness of the as-coated samples have been reported. The X-ray diffraction,field emission-scanning electron microscopy/energy dispersive spectroscopy, and X-ray mapping characterization techniques have been utilized for structural analysis of the as-coated and hot-corroded samples. The results showed that both coatings were deposited with a porosity less than2%. Both coated samples revealed the development of harder surfaces than the substrate. During hot corrosion testing, the bare T22 steel showed an accelerated corrosion in comparison with its coated counterparts. The HVOF-sprayed coatings were befitted effectively by maintaining their adherence during testing. The Ni22Cr10Al1Y–20 wt%SiC(N) composite coating was more effective than the Ni–22Cr–10Al–1Y coating against corrosion in the high-temperature fluxing process.

关键词： high-velocity oxy fuel thermal spray hot corrosion oxide scale nano-structured coating

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Synthesis,characterization and evaluation of polyacrylamide graft starch/clay nanocomposite hydrogel system for enhanced oil recovery

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Petroleum Science 2017年第4期14卷 765-779页

作者： Rituraj Singh vikas Mahto Department of Petroleum Engineering Indian Institute ofTechnology(Indian School of Mines)Dhanbad 826004India

In this paper the suitability of a graft polymer nanocomposite hydrogel system for enhanced oil recovery was examined using polyacrylamide graft starch/clay nanocomposite(a laboratory synthesized product) and chromium(III) acetate(crosslinker). X-ray diffraction analysis,Fourier transform infrared spectrometry analysis, field-emission scanning electron microscopy and transmission electron microscopy were carried out to reveal the laboratory synthesized product as a nanocomposite. The effects of various parameters like salt concentration, p H, temperature, polymer concentration and crosslinker concentration on the properties of the developed gel system were systematically *** thermal stability of the nanocomposite gel and the conventional gel system were also determined by thermogravimetric analysis. The graft polymer nanocomposite gel system exhibited acceptable gel strength, gelation time and gel stability compared with the conventional gel system. The nanocomposite gels prepared using a low crosslinker concentration showed higher gel strength and required longer gelation time than the conventional gel which is more desirable properties for the effective placement of gel during enhanced oil recovery operations. In addition, sand pack flooding experiments show that the graft polymer nanocomposite gels had better plugging capacity than the conventional gel systems under reservoir conditions. Hence, this gel system may be suitable in the water shutoff treatments required for enhanced oil recovery from oilfields.

关键词： Nanocomposite Graft polymer Nanoclay Hydrogel Water shutoff

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Modified(G'/G)-expansion method for finding traveling wave solutions of the coupled Benjamin-Bona-Mahony-KdV equation

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Journal of Ocean Engineering and Science 2019年第3期4卷 252-255页

作者： vikas Kumar Department of Mathematics D.A.V.College PundriKaithal 136026HaryanaIndia

Using the Lie symmetry approach,the author has examined traveling wave solutions of coupled Benjamin-Bona-Mahony-KdV *** coupled Benjamin-Bona-Mahony-KdV equation is reduced to nonlinear ordinary differential equations for all optimal subalgebras by using Lie classical symmetries and various solutions are obtained by the modified(G'/G)-expansion ***,with the aid of solutions of the nonlinear ordinary differential equations,more explicit traveling wave solutions of the coupled Benjamin-Bona-Mahony-KdV equation are found *** traveling wave solutions are expressed by rational function.

关键词： Coupled Benjamin-Bona-Mahony-KdV equation Lie symmetric analysis Exact solutions Modified(G'/G)-Expansion method

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Quantile-Based Shannon Entropy for Record Statistics

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Communications in Mathematics and Statistics 2023年第2期11卷 283-306页

作者： vikas Kumar Bhawna Dangi Department of Applied Sciences University Institute of Engineering and TechnologyM.D.UniversityRohtak 124001India

The quantile-based entropy measures possess some unique properties than their distribution function *** present communication deals with the study of the quantile-based Shannon entropy for record *** this regard a generalized model is considered for which cumulative distribution function or probability density function does not exist and various examples are provided for illustration *** we consider the dynamic versions of the proposed entropy measure for record statistics and also give a characterization result for *** the end,we study F^(α)-family of distributions for the proposed entropy measure.

关键词： Shannon entropy Record value Quantile function Quantile entropy F^(α)-family

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HIGHER-ORDER NON-SYMMETRIC DUALITY FOR NONDIFFERENTIABLE MINIMAX FRACTIONAL PROGRAMS WITH SQUARE ROOT TERMS

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Acta Mathematica Scientia 2020年第1期40卷 127-140页

作者： SONALI vikas SHARMA Navdeep KAILEY School of Mathematics Thapar Institute of Engineering and TechnologyPatialaIndia

In this paper,we emphasize on a nondifferentiable minimax fractional programming(NMFP)problem and obtain appropriate duality results for higher-order dual model under higher-order B-(p,r)-invex *** provide a nontrivial illustration of a function which belongs to the class of higher-order B-(p,r)-invex but not in the class of second-order B-(p,r)-invex functions already existing in *** example of finding a minimax solution of NMFP problem by using higher-order B-(p,r)-invex functions has also been *** known results are discussed as particular cases.

关键词： nonlinear programming higher-order duality fractional programming minimax programming B-(p,r)-invexity

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Learning physically based material and lighting decompositions for face editing

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Computational Visual Media 2024年第2期10卷 295-308页

作者： Qian Zhang vikas Thamizharasan James Tompkin Brown University ProvidenceRhode Island 02906USA

Lighting is crucial for portrait photography,yet the complex interactions between the skin and incident light are expensive to model computationally in graphics and difficult to reconstruct analytically via computer ***,to allow fast and controllable reflectance and lighting editing,we developed a physically based decomposition through deep learned priors from path-traced portrait *** approaches that used simplified material models or low-frequency or low-dynamic-range lighting struggled to model specular reflections or relight directly without intermediate ***,we estimate the surface normal,skin albedo and roughness,and high-frequency HDRI maps,and propose an architecture to estimate both diffuse and specular reflectance *** our experiments,we show that this approach can represent the true appearance function more effectively than simpler baseline methods,leading to better generalization and higher-quality editing.

关键词： intrinsic decomposition portrait relighting inverse rendering deep learning

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