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Effects of side ratio for ‘Y’ plan shaped tall building under wind load

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Building Simulation 2021年第4期14卷 1221-1236页

作者： prasenjit Sanyal Sujit Kumar Dalui Department of Civil Engineering Meghnad Saha Institute of TechnologyKolkataIndia Department of Civil Engineering IIESTShibpurHowrahIndia

Wind load and response are the major factors that govern the most critical condition for designing tall buildings. This study discusses the variability of wind load and pressure on a Y plan shaped tall building due to the change in the building side ratio. The length to width ratio is changed keeping the total plan area same. The numerical study is done by ANSYS CFX. Two turbulence models, k-epsilon and shear stress transport (SST), are used for doing the numerical simulation and the results are compared with the previous wind tunnel results in a similar flow condition. Sample points were selected based on Audze–Eglais Uniform Latin Hypercube (AELH) method and the analytical expressions of force, moment and torsional coefficients of Y plan shaped tall building are proposed. These expressions are fitted very well and the AELH method has given a great set of sample points that have significantly decreased the total computational time. The graphical representations of these expressions for various coefficients are presented and discussed. Then pressure distributions on three different models are compared and the pros and cons of higher and lower values of side ratios are discussed.

关键词： computational fluid dynamics AELH sampling method least square polynomial side ratio force coefficient moment coefficient

Energy efficient fault-tolerant multipath routing scheme for wireless sensor networks

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The Journal of China Universities of Posts and Telecommunications 2013年第6期20卷 42-48,61页

作者： prasenjit Chanak Indrajit Banerjee Department of Information Technology Bengal Engineering and Science University

In wireless sensor network （MSN）, reliability is the main issue to design any routing technique. To design a comprehensive reliable wireless sensor network, it is essential to consider node failure and energy constrain as inevitable phenomena. In this paper we present energy efficient node fault diagnosis and recovery for wireless sensor networks referred as energy efficient fault tolerant multipath routing scheme for wireless sensor network. The scheme is based on multipath data routing. One shortest path is used for main data routing in our scheme and other two backup paths are used as alternative path for faulty network and to handle the overloaded traffic on main channel. Shortest pat data routing ensures energy efficient data routing. Extensive simulation results have revealed that the performance of the proposed scheme is energy efficient and can tolerates more than 60% of fault.

关键词： WSN fault tolerance (FT) load balance routing energy efficiency

Attrition resistance,a sporadically studied factor in aqueous adsorption:Status quo and research outlook towards creating better adsorbents

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Particuology 2023年第6期77卷 71-78页

作者： Ackmez Mudhoo Khim Hoong Chu prasenjit Mondal Department of Chemical and Environmental Engineering Faculty of EngineeringUniversity of MauritiusRéduit80837Mauritius Honeychem Research NewtownWellington6021New Zealand Department of Chemical Engineering Indian Institute of Technology RoorkeeRoorkeeUttarakhand247667India

Attrition resistance in an adsorbent is one measure of its mechanical *** quantifies its ability to resist the impact of frictional forces generated in a milieu where hydrodynamic agitation ***,attrition resistance has been only sporadically examined in adsorbents used to remove aqueous *** attrition is relevant in aqueous adsorption process design,this review discusses the quan-tification of attrition resistance,variability in loss due to attrition across adsorbents,and the implications of attrition on adsorption ***,some key research opportunities that could be explored for a better understanding of attrition in real-scale water purification are *** is inferred that sub-stantial research and development still needs to be accomplished to better understand the attrition resistance-adsorbent behavior within real-scale aqueous adsorption *** results can be harnessed to design and produce more robust,efficient and cost-effective adsorbents.

关键词： Attrition resistance Adsorbent Morphology change Aqueous adsorbate

Studies on modified power law inflation

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Chinese Physics C 2023年第3期47卷 273-281页

作者： prasenjit Paul Rikpratik Sengupta Saibal Ray Department of Physics Government College of Engineering and Ceramic TechnologyKolkataWest Bengal 700010India Department of Physics Aliah UniversityAction Area IlNewtownKolkataWest Bengal 700156India Centre of Cosmology Astrophysics and Space Science(CCASS)GLA UniversityMathuraUttar Pradesh 281406India

In this study,we evaluate power law inflation(PLI)with a monomial potential and obtain a novel exact *** is well known that the conventional PLI with an exponential potential is inconsistent with the Planck *** the standard PLI,the present model does not encounter the graceful exit problem,and the results agree fairly well with recent *** our analysis,we calculate the spectral index and the tensor-to-scalar ratio,both of which agree very well with recent observational data and are comparable with those of other modified inflationary *** employed technique reveals that the large cosmological constant decreases with the expansion of the universe in the case of the *** coupling of the inflaton with gravitation is the primary factor in this *** basic assumption here is that the two metric tensors in the gravitational and inflaton parts correspond to different conformal frames,which contradicts with the conventional PLI,where the inflaton is directly coupled with the background metric *** fact has direct applications to different dark energy models and the assisted quintessence theory.

关键词： power law inflation conformal coupling inflaton cosmological constant

Load-dependent indentation behavior ofβ-SiAlON andα-silicon carbide

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Journal of Advanced Ceramics 2013年第2期2卷 185-192页

作者： prasenjit BARICK Dulal Chandra JANA Bhaskar Prasad SAHA Centre for Non-Oxide Ceramics International Advanced Research Centre for Powder Metallurgy and New MaterialsPO:BalapurRCI RoadHyderabad 500005Andhra PradeshIndia

A comparative study was carried out on the load-dependent indentation behavior with respect to hardness and induced cracks ofβ-SiAlON andα-silicon carbide *** is observed that silicon carbide(SiC)exhibits lower transition load,early cracking and severely crushed indentation sites,whereasβ-SiAlON shows higher transition load and damage-free indentation zone even at the maximum applied load(294.19 N).Crack density is higher forα-SiC with comparison toβ-SiAlON at each *** exhibits both main and secondary radial types of cracking from low indentation load(0.98 N).Cracks are often associated with branching at higher load(>9.80 N)forα-SiC.β-SiAlON exhibits cracks which are mainly radial types initiated at 4.90 N *** opposing behaviors ofβ-SiAlON andα-SiC are attributed to their difference in hardness,toughness,and brittleness *** brittleness ofα-SiC results in early and severe cracking around its indentations.β-SiAlON shows less cracking due to its lower brittleness and higher *** increased size of indentation-induced cracks ofα-SiC is higher than that ofβ-SiAlON due to the rapid crack propagation inα-SiC with transgranular fracture behavior.

关键词： SiAlON silicon carbide(SiC) indentation hardness crack

Dynamic model identification of a real-time simple level control system

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Journal of Control and Decision 2016年第4期3卷 248-266页

作者： prasenjit Ghorai Somanath Majhi Saurabh Pandey Department of Electronics and Instrumentation Engineering National Institute of Technology AgartalaTripuraIndia Department of Electronics and Electrical Engineering Indian Institute of Technology GuwahatiAssamIndia

Using a relay feedback approach,mathematical expressions for identification of real-time level control system in transfer function form are proposed in this *** ideal relay with hysteresis is feedback to a simple level control system for the generation of sustained ***,limit cycle information is utilised in deduced expressions for the estimation of unknown system *** describing function analysis,the gain of an ideal relay with hysteresis is approximated to yield simple mathematical *** examples from literature are considered to show the effectiveness of the proposed identification *** distributed control system:CENTUM CS 3000 is considered as a platform for the realisation of both relay feedback and Ziegler-Nichols(ZN)*** accuracy of derived transfer function models is compared with a model derived from ZN method and thereafter demonstrated through frequency response plots which illustrate the experimental validation of the identified real-time process model.

关键词： Describing function level control system limit cycle process identification and relay feedback

Fluctuating Role of Parameters in the Analysis of the Continues and Discrete Version of a Susceptible-Incubated-Infected Model

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International Journal of Modern Nonlinear Theory and Application 2012年第2期1卷 47-50页

作者： prasenjit Das Debasis mukherjee Kalyan Das A. Sabarmathi Baikunthapur High School Maipith India Department of Mathematics National Institute of Food Technology Entrepreneurship and Management HSIIDC Industrial Estate Kundli India Department of Mathematics School of Advanced Sciences VIT University Vellore India Department of Mathematics Vivekananda College Kolkata India

The article concentrates on the role of fluctuating parameters for removable population from the incubated class in a susceptible-incubated-infected model. The discrete analogous of this model is also investigated. Conditions for local asymptotic stability are derived for both the disease free and endemic cases. Numerical simulations are performed to validate the theoretical results.

关键词： Incubated Class Stability Schur-Cohn Criterion

Semiconductor based photocatalysts for detoxification of emerging pharmaceutical pollutants from aquatic systems: A critical review

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Nano Materials Science 2021年第1期3卷 25-46页

作者： prasenjit Kar Komal Shukla Pratyush Jain Govindasamy Sathiyan Raju Kumar Gupta Department of Chemical Engineering Indian Institute of Technology KanpurKanpur208016Uttar PradeshIndia Center for Environmental Science and Engineering Indian Institute of Technology KanpurKanpur208016Uttar PradeshIndia

The presence of emerging pharmaceutical pollutants at low concentration levels in the surface and ground water has caused a potential threat to the marine and human *** emerging pharmaceutical pollutants generally include analgesics and anti-inflammatories,lipid-lowering drugs,antiepileptics,antibiotics,and β-blockers *** recent years,various processes have been developed and advanced oxidation process is the most effective for decontamination of emerging pharmaceutical pollutants till *** based photocatalysis technology has recently received a great interest for the removal of new emerging pharmaceutical *** review article highlights the removal of emerging pharmaceutical pollutants especially through photocatalysis as well as recent progress using different *** focus has been given over fundamental key dynamics processes of nanomaterials and degradation pathways of emerging pharmaceutical ***,this review concludes with the perspectives and outlook over future developments in photocatalysis technology for the degradation of emerging pharmaceutical pollutants leading to a solution for realworld in near future.

关键词： Emerging pharmaceutical pollutants Photocatalysis Nanomaterials Degradation mechanism

Insight into the efficacy profile of fermented soy foods against diabetes

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Food Bioscience 2023年第3期53卷 196-217页

作者： Dibyendu Das Sawlang Borsingh Wann Jatin Kalita prasenjit Manna Biological Sciences and Technology Division CSIR-North East Institute of Science and TechnologyJorhat785006AssamIndia Academy of Scientific and Innovative Research(AcSIR) Ghaziabad201002Uttar PradeshIndia Center for Infectious Diseases CSIR-North East Institute of Science and TechnologyJorhat785006AssamIndia

Fermented soy foods(FSFs)are consumed as a common staple in many countries of *** are receiving cosmopolitan demand because of their impressive functional *** comprise numerous bioactive components and phytochemicals with multiple health benefits besides valuable *** suggests that use of FSFs are more beneficial than their non-fermented forms because of their higher digestibility,functional components,good probiotic content and lower amount of anti-nutritional ***,a large body of evidence signifies antidiabetic properties of FSFs.A plethora of in vitro,in vivo and clinical experiments revealed that FSFs prepared either through traditional or standardized methods could be operative against hyperglycemia,insulin resistance,aberrant energy metabolism,oxidative stress and low-grade inflammation associated with diabetic *** antidiabetic efficacies of FSFs were attributed to various functional ingredients including bioactive peptides,isoflavones,polyphenols,and *** collective molecular insights in support of antidiabetic actions of FSFs and their derivative components unraveled a wide range of pharmacological targets,such as carbohydrate/lipid hydrolyzing enzymes,cell signaling molecules,transcription factors,and cell-surface transporters in multiple *** present review aims to summarize and systematically represent the antidiabetic potency of various fermentation-based soy foods including fermented soy paste,sauce,milk,condiment,permeate according to the interpretations from in vitro,pre-clinical and clinical ***,the pleotropic roles of biofactors underlying the anti-hyperglycemic potential of FSFs are deciphered in the present piece of *** cumulative representation along with current opinions and future perspectives could be helpful for the emergence of food-based therapeutics.

关键词： Fermented soy foods Glucose and lipid metabolism Oxidative stress Bioactive-peptides Isoflavones