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A nonautonomous mat hematical model to assess the impact of algae on the abatement of atmospheric carbon dioxide

International Journal of Biomathematics 2021年第7期14卷 227-264页

作者： Pankaj kumar Tiwari Rajesh kumar Singh Debaldev Jana Yun Kang arvind kumar misra Department of Basic Science and Humanities Indian Institute of Information Technology Bhagalpur 813210 India Government Shahid Kedamath P.G.College Mauganj Rewa 486331India Department of Mathematics&SRM Research Institute SRM Institute of Science and Technology Kattankulathur 603203 Tamil NaduIndia Science and Mathematics Faculty Arizona State University Mesa AZ 85212USA Department of Mathematics Institute of Science Banaras Hindu UniversityVaranasi 221005India

The world's oceans have played an important role in sequestering atmospheric carbon dioxide through solubility and the action of *** of atmospheric carbon dioxide by photoautotrophic algal cultures has the potential to diminish the release of carbon dioxide into the atmosphere,thereby helping to alleviate the trend toward global *** work investigates the role of algae in controlling the level of atmospheric carbon *** Rank Correlation Coefficients(PRCCs)technique is used to address how the concentration of atmospheric carbon dioxide is affected by changes in a specific parameter disregarding the uncertainty over the rest of the model *** related to algal growth are shown to significantly reduce the level of atmospheric CO_(2).Further,we explore the dynamics of nonautonomous system by incorporating the seasonal variations of sonic ecologically important model *** nonautonomous system exhibits globally attractive positive periodic solution,and also the appearance of double periodic solution is ***,by letting the seasonally forced parameters as almost periodic functions of time,we show almost periodic behavior of the *** findings suggest that the policy makers should focus on continuous addition of nutrients in the ocean to accelerate the algal growth thereby reducing the level of carbon dioxide in the atmosphere.

关键词： Mathematical model algae atmospheric CO2 sensitivity analysis:seasonality periodic solution

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Thermodynamic properties and phase diagram of quark matter within non-extensive Polyakov chiral SU(3)quark mean field model

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Chinese Physics C 2024年第5期48卷 60-71页

作者： Dhananjay Singh arvind kumar Department of Physics Dr.B R Ambedkar National Institute of Technology JalandharJalandhar–144008PunjabIndia

In the present study,we applied Tsallis non-extensive statistics to investigate the thermodynamic properties and phase diagram of quark matter in the Polyakov chiral SU(3)quark mean field *** this model,the properties of the quark matter were modified through the scalar fieldsσ,ζ,δ,χ,vector fieldsω,ρ,ϕ,and Polyakov fieldsΦandΦ¯at finite temperature and chemical ***-extensive effects were introduced through a dimensionless parameter q,and the results were compared to those of the extensive case(q→1).In the non-extensive case,the exponential in the Fermi-Dirac(FD)function was modified to a q-exponential *** influence of the q parameter on the thermodynamic properties,pressure,energy,and entropy density,as well as trace anomaly,was *** speed of sound and specific heat with non-extensive effects were also ***,the effect of non-extensivity on the deconfinement phase transition as well as the chiral phase transition of u,d,and s quarks was *** found that the critical end point(CEP),which defines the point in the(T−μ)phase diagram where the order of the phase transition changes,shifts to a lower value of temperature,TCEP,and a higher value of chemical potential,μCEP,as the non-extensivity is increased,that is,q>1.

关键词： quark matter quark mean field model QCD phase diagram non-extensive statistics

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Simultaneous inversion of permeability,skin and boundary from pressure transient test data in three-dimensional single well reservoir model

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Petroleum Research 2024年第2期9卷 265-272页

作者： arvind kumar Lin Liang Keka Ojha Schlumberger India Indian Institute of Technology(ISM) DhanbadIndia

This study presents a novel approach for simultaneous inversion of the key reservoir parameters like horizontal permeability,vertical permeability,skin,and boundary distances for spatial distribution across the grid cells in a 3D single well reservoir model(SWRM).These parameters are first estimated from the standard pressure transient analysis of well test pressure and rate data,which also act as a priori for the inverse problem.A field-worthy layer cake geological model is prepared based on the prior information obtained from pressure transient analysis,followed by a sequential flow simulation of field well test *** simulation results provide the model pressure versus rate data as the synthetic data for this study.A cost function is defined incorporating the well test pressure data and model pressure data,which would determine the *** inversion process is to optimize the spatial distribution of reservoir parameters to minimize the difference between the measured pressure transient data and the modelled one,which is obtained from the multiphase fluid flow simulator that solves the implicit black-oil fluid-flow diffusivity equations at every step.A Gauss-Newton(GN)inversion scheme is used for the *** reliability of inversion results depends on the accuracy of priori reservoir parameters fed to the solver,which can be refined if required through uncertainty parameter optimization(UPO).This approach helps to obtain a faster and reliable update of reservoir parameters in a layer cake homogeneous geomodel,hereby introducing the required *** increases the confidence and reliability of a geomodel,which is further used for various production prediction strategies.

关键词： Well test Pressure transient Inversion Permeability Boundary

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Identification of earthquake induced structural damage based on synchroextracting transform

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 475-487页

作者： Roshan kumar Gaurav kumar Wei Zhao arvind R Yadav Gang Yu Jayendra kumar Evans Amponsah Department of Electronic and Information Technology Miami College of Henan UniversityHenan 475004China Alliance University Alliance College of Engineering and DesignBanglore 562106India Department of Electronics and Comm Parul UniversityVadodra 391760India School of Electrical Engineering University of JinanJinan 250022China Department of Electronics and Comm NIT JamshedpurJamshedpur 831014India Department of Civil engineering Kwame Nkrumah University of Science and TechnologyKumasi 10959Ghana

Several popular time-frequency techniques,including the Wigner-Ville distribution,smoothed pseudo-Wigner-Ville distribution,wavelet transform,synchrosqueezing transform,Hilbert-Huang transform,and Gabor-Wigner transform,are investigated to determine how well they can identify damage to *** this work,a synchroextracting transform(SET)based on the short-time Fourier transform is proposed for estimating post-earthquake structural *** performance of SET for artificially generated signals and actual earthquake signals is examined with existing *** other tested techniques,SET improves frequency resolution to a great extent by lowering the influence of smearing along the time-frequency ***,interpretation and readability with the proposed method are improved,and small changes in the time-varying frequency characteristics of the damaged buildings are easily detected through the SET method.

关键词： cross-term damage detection earthquake signal synchroextracting transform time-frequency

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Bidirectional link between periodontitis and systemic inflammation in diabetic retinopathy

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World Journal of Diabetes 2024年第7期15卷 1651-1653页

作者： Prateek Nishant Sony Sinha Ranjeet kumar Sinha arvind kumar Morya Department of Ophthalmology ESIC Medical CollegePatna 801103BiharIndia Department of Ophthalmology-Vitreo-Retina Neuro-Ophthalmology and OculoplastyAll India Institute of Medical SciencesPatna 801507BiharIndia Department of Community Medicine Patna Medical CollegePatna 800004BiharIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia

Periodontitis is independently associated with numerous lifestyle *** patients have approximately threefold increased odds of periodontitis,which in turn increases the risk of systemic *** study by Thazhe Poyil et al is an effort to establish the inflammatory link between diabetic retinopathy(DR)and periodontitis based on the periodontal inflamed surface area in diabetic patients with and without *** further advance the study,we suggest refining the eligibility criteria to explicitly state the clinical correlates of periodontitis and DR,larger sample size and improved sampling methodology,matching of baseline characteristics of the two groups,as well as improved statistical approach and interpretation of the study *** of hemoglobin A1c(HbA1c)in studies comparing type 2 diabetes mellitus patients with DR of matched severity with and without periodontitis could provide a clearer picture of whether HbA1c level is indeed influenced by periodontitis.

关键词： Glucose intolerance Hyperglycemia Inflammation Research methodology Vision

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Diabetes is affecting everyone everywhere

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World Journal of Diabetes 2024年第2期15卷 305-307页

作者： Parul Chawla Gupta Mona Duggal arvind kumar Morya Department of Ophthalmology Post Graduate Institute of Medical Education&ResearchChandigarh 160012PunjabIndia School of Public Health Post Graduate Institute of Medical Education and ResearchChandigarh 160002PunjabIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia

The article titled“Accessibility and Utilization of Healthcare Services Among Diabetic Patients:Is Diabetes a Poor Man’s Ailment?”gave insights into a pandemic systemic disease known as diabetes *** modern-era pandemic affects everyone,regardless of their financial *** a result,diabetes is not a systemic disease which just involves people of low socioeconomic status.

关键词： Diabetes Incidence and prevalence Diabetes mellitus

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Nutrition interventions and clinical outcomes of pregnant women with gestational diabetes mellitus: More than meets the eye

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World Journal of Diabetes 2024年第1期15卷 126-128页

作者： Sony Sinha Prateek Nishant Ranjeet kumar Sinha arvind kumar Morya Ripunjay Prasad Department of Ophthalmology-Vitreo-Retina Neuro-Ophthalmology and OculoplastyAll India Institute of Medical SciencesPatnaPatna 801507BiharIndia Department of Ophthalmology ESIC Medical CollegePatnaPatna 801103BiharIndia Department of Community Medicine Patna Medical CollegePatna 800004BiharIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology RP Eye InstituteDelhi 110001DelhiIndia

In the retrospective study by Luo et al regarding clinical outcomes in gestational diabetes mellitus(GDM),the results are statistically significant in favour of the benefits of individualized nutrition interventions enumerated *** study has provided important evidence to improve maternal and child health in the Asian *** methods,however,appear to have considerable limi-tations,wherein the time point of diagnosis of GDM,severity of GDM,selection bias,compliance to therapy,important maternal covariates,observable microvascular abnormalities and the confounding effect of added insulin have not been *** have provided suggestions to improve the external validity of the study,including the use of Equator Network reporting guidelines and inclusion of overweight and obese patients in future studies.

关键词： Glucose intolerance Hyperglycemia Obesity Pregnancy Research methodology

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Chiglitazar and Thiazolidinedione in patients with type 2 diabetes:Which is better?

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World Journal of Diabetes 2024年第3期15卷 565-567页

作者： Kotha Sugunakar Reddy Archana Gaur Sakthivadivel Varatharajan arvind kumar Morya Department of General Medicine All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Physiology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Medicine All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia

This published Meta-Analysis by Lin et al is an indirect comparison between two drugs Chiglitazar and Thiazolidinedione which are commonly used for glycemic control in type-Ⅱ diabetes *** terms of safety and efficacy... 详细信息

关键词： Type-Ⅱdiabetes mellitus Glucose intolerance Hyperglycemia Research methodology

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Intraocular lens selection in diabetic patients:How to increase the odds for success

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World Journal of Diabetes 2024年第6期15卷 1199-1211页

作者： arvind kumar Morya Prateek Nishant Prasanna Venkatesh Ramesh Sony Sinha Aarti Heda Sarika Salodia Ripunjay Prasad Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology ESIC Medical CollegePatna 801113BiharIndia Department of Glaucoma and Research Mahathma Eye Hospital Private LimitedTrichy 620017Tamil NaduIndia Department of Ophthalmology-Vitreo-Retina Neuro-Ophthalmology and OculoplastyAll India Institute of Medical SciencesPatnaPatna 801507BiharIndia Department of Ophthalmology National Institute of OphthalmologyPune 411000MaharashtraIndia Department of Safety Global Medical SafetyLundbeckSingapore 307591Singapore Department of Ophthalmology RP Eye InstituteDelhi 110001India

The incidence of cataracts is significantly higher in diabetic individuals,particularly in younger age groups,with rates quadrupled in those under 65 and doubled in those over 65 compared to *** surgery in diabetic patients poses many challenges:Poor epithelial healing,decreased corneal sensitivity,increased central corneal thickness,decreased endothelial cell count,variable topography,poor pupillary dilatation,anterior capsular phimosis,posterior capsular opacification(PCO),chances of progression of diabetic retinopathy(DR),zonular weakness,and vitreous prolapse and diabetic macular *** of an appropriate intraocular lens(IOL)is crucial for visual rehabilitation and monitoring *** choice of IOL in diabetic cataract patients is a challenging ***-edge IOLs are favored for their capacity to mitigate PCO,whereas hydrophilic counterparts may incur calcification in the setting of proliferative *** advisability of premium IOLs for achieving spectacle independence warrants judicious evaluation,particularly in the presence of advanced *** IOL placement within the capsular bag is advocated to minimize postoperative *** preoperative assessment and informed patient counseling regarding IOL options are indispensable for optimizing surgical *** review article covers various aspects regarding the choice of IOLs in different case scenarios and complications in the diabetic population.

关键词： Diabetics Cataract Intraocular lens Diabetic retinopathy Diabetes mellitus

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Intensive care unit-acquired weakness and mechanical ventilation:A reciprocal relationship

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World Journal of Clinical Cases 2024年第18期12卷 3644-3647页

作者： Ranjeet kumar Sinha Sony Sinha Prateek Nishant arvind kumar Morya Department of Community Medicine Patna Medical CollegeBiharPatna 800004India Department of Ophthalmology-Vitreo-Retina Neuro-Ophthalmology and OculoplastyAll India Institute of Medical SciencesBiharPatna 801507India Department of Ophthalmology ESIC Medical CollegeBiharPatna 801113India Department of Ophthalmology All India Institute of Medical SciencesTelanganaHyderabad 508126India

Intensive care unit-acquired weakness(ICU-AW;ICD-10 Code:G72.81)is a syndrome of generalized weakness described as clinically detectable weakness in critically ill patients with no other credible *** risk factors for ICU-AW include hyperglycemia,parenteral nutrition,vasoactive drugs,neuromuscular blocking agents,corticosteroids,sedatives,some antibiotics,immobilization,the disease severity,septicemia and systemic inflammatory response syndrome,multiorgan failure,prolonged mechanical ventilation(MV),high lactate levels,older age,female sex,and pre-existing systemic *** is a definite association between the duration of ICU stay and MV with ***,the interpretation that these are modifiable risk factors influencing ICU-AW,appears to be flawed,because the relationship between longer ICU stays and MV with ICU-AW is reciprocal and cannot yield clinically meaningful strategies for the prevention of *** strategies must be based on other risk *** multicentric randomized controlled trials as well as meta-analysis of such studies can be a more useful approach towards determining the influence of these risk factors on the occurrence of ICU-AW in different populations.

关键词： Critical illness Meta-analysis Morbidity Myopathy Polyneuropathy Risk factors

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