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Practice patterns among ophthalmic surgeons in treating concomitant oculoplastic conditions in preoperative period:A questionnaire-based study

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World Journal of Clinical Cases 2025年第1期13卷 29-37页

作者： Bijnya Birajita Panda Chitaranjan mishra Bhagabat Nayak Avik Kumar Roy Logesh Balakrishnan Priyadarshini mishra Department of Ophthalmology All India Institute of Medical SciencesBhubaneswar 751019OdishaIndia Department of vitreo-Retina Trilochan NetralayaSambalpur 768004India Department of Glaucoma Services LV Prasad Eye InstituteBhubaneswar 751013India Department of Statistics Apollo HospitalsChennai 823104India

BACKGROUND Addressing oculoplastic conditions in the preoperative period ensures both the safety and functional success of any ophthalmic *** oculoplastic conditions,like nasolacrimal duct obstruction,have been extensively studied,whereas others,like eyelid malposition and thyroid eye disease,have received minimal or no *** To investigate the current practice patterns among ophthalmologists while treating concomitant oculoplastic conditions before any subspecialty ophthalmic *** A cross-sectional survey was disseminated among ophthalmologists all over *** survey included questions related to pre-operative evaluation,anaesthetic and surgical techniques preferred,post-operative care,the use of adjunctive therapies,and patient follow-up *** A total of 180 ophthalmologists responded to the *** practitioners(89%)felt that the ROPLAS test was sufficient during pre-operative evaluation before any subspecialty surgery was *** most common surgical techniques employed were lacrimal drainage procedures(Dacryocystorhinostomy)(63.3%),eyelid malposition repair(36.9%),and ptosis repair(58.7%).Post-operatively,47.7%of respondents emphasized that at least a 4-week gap should be maintained after lacrimal drainage procedures and eyelid ***-seven percent of ophthalmologists felt that topical anaesthetic procedures should be preferred while performing ocular surgeries in thyroid eye disease *** Approximately 50%of ophthalmologists handle prevalent oculoplastic issues themselves,seeking the expertise of an oculoplastic surgeon under particular *** ophthalmologists still favor using ROPLAS as a preliminary screening method before proceeding with cataract *** conditions and thyroid eye disease are not as commonly addressed before subspecialty procedures compared to issues like nasolacrimal duct obstruction and periocular infections.

关键词： Oculoplasty Ophthalmic plastic surgery Nasolacrimal duct obstruction Practice patterns Survey

Exponential Compact Higher Order Scheme for Nonlinear Steady Convection-Diffusion Equations

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Communications in Computational Physics 2011年第4期9卷 897-916页

作者： Y.v.S.S.Sanyasiraju Nachiketa mishra Department of Mathematics Indian Institute of Technology MadrasChennai 600036India

This paper presents an exponential compact higher order scheme for Convection-Diffusion Equations(CDE)with variable and nonlinear convection *** scheme is O(h4)for one-dimensional problems and produces a tri-diagonal system of equations which can be solved efficiently using Thomas *** twodimensional problems,the scheme produces an O(h4+k4)accuracy over a compact nine point stencil which can be solved using any line iterative approach with alternate direction implicit *** convergence of the iterative procedure is guaranteed as the coefficient matrix of the developed scheme satisfies the conditions required to be *** number analysis has been carried out to establish that the scheme is comparable in accuracy with spectral *** higher order accuracy and better rate of convergence of the developed scheme have been demonstrated by solving numerous model problems for one and two-dimensional CDE,where the solutions have the sharp gradient at the solution boundary.

关键词： Finite difference higher order exponential compact convection-diffusion

Snow Cover variation and Streamflow Simulation in a Snow-fed River Basin of the Northwest Himalaya

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Journal of Mountain Science 2012年第6期9卷 853-868页

作者： vaibhav SHARMA v.D.mishra P.K.JOSHI Snow and Avalanche Study Establishment Him ParisarSector 37AChandigarh 160036India TERI University New Delhi-110070India

Snowmelt is an important component of any snow-fed river *** Jhelum River is one such transnational mountain river flowing through India and *** basin is minimally glacierized and its discharge is largely governed by seasonal snow cover and ***,accurate estimation of seasonal snow cover dynamics and snowmeltinduced runoff is important for sustainable water resource management in the *** present study looks into spatio-temporal variations of snow cover for past decade and stream flow simulation in the Jhelum River *** cover extent(SCE) was estimated using MODIS(Moderate Resolution Imaging Spectrometer) sensor *** Difference Snow Index(NDSI) algorithm was used to generate multi-temporal time series snow cover *** results indicate large variation in snow cover distribution pattern and decreasing trend in different sub-basins of the Jhelum *** relationship between SCE-temperature,SCE-discharge and discharge-precipitation was analyzed for different seasons and shows strong *** streamflow simulation of the entire Jhelum basin Snow melt Runoff Model(SRM) used.A good correlation was observed between simulated stream flow and in-situ *** monthly discharge contribution from different sub-basins to the total discharge of the Jhelum River was estimated using a modified version of runoff model based on temperature-index approach developed for small *** power - an indicator of the erosive capability of streams was also calculated for different sub-basins.

关键词： Snow cover extent(SCE) Streamflow Snow Melt Runoff Model(SRM) Normalized Difference Snow Index(NDSI) Jhelum basin Moderate Resolution Imaging Spectrometer(MODIS)

Microstructure and mechanical properties of friction welded carbon steel(EN24) and nickel-based superalloy(IN718)

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 111-119页

作者： v.T.Gaikwad M.K.mishra v.D.Hiwarkar R.K.P.Singh Kalyani Centre for Technology and Innovation Bharat Forge LimitedPune 411036India Department of Materials Engineering Defense Institute of Advance TechnologyPune 411025India

Continuous-drive rotary friction welding was performed to join cylindrical specimens of carbon steel(EN24) and nickel-based superalloy(IN718), and the microstructures of three distinct weld zones—the weld interface(WI)/thermo-mechanically affected zone(TMAZ),the heat-affected zone(HAZ), and the base metal—were *** joint was observed to be free of defects but featured uneven flash *** backscatter diffraction(EBSD) analysis showed substantial changes in high-angle grain boundaries, low-angle grain boundaries, and twin boundaries in the TMAZ and ***, significant refinement in grain size(2 –5 μm) was observed at the WI/TMAZ with reference to the base *** possible causes of these are *** microhardness profile across the welded joint shows variation in *** changes in hardness are ascribed to grain refinement, phase transformation, and the dissolution of strengthening *** tensile test results reveal that a joint efficiency of 100% can be achieved using this method.

关键词： friction welding dissimilar metals EN24 IN718 microstructure mechanical properties

Improved Fracture Toughness of Cryorolled and Room Temperature Rolled 6082 Al Alloys

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 359-367页

作者： vineet Kumar I.v.Singh B.K.mishra R.Jayaganthan Department of Mechanical and Industrial Engineering Indian Institute of Technology Department of Metallurgical and Materials Engineering Indian Institute of Technology

In the present work, 6082 Al alloy has been rolled to 40% and 70% thickness reductions at the cryogenic and room temperatures for the improvement in mechanical and fracture toughness properties. All cryorolled samples are subjected to aging at different temperatures, i.e., 140, 160, and 190 ℃ to improve the strength, ductility, and fracture toughness. The microstructures of the cryorolled （CR） and room temperature rolled （RTR） alloy after 40% and 70% thickness reductions are characterized by FE-SEM to reveal the modes of failure. The results show that the starting bulk Al alloy specimen is fractured in total ductile manner, consisting of well-developed dimples over the entire surface. The mechanical properties and fracture toughness of the 70% CR alloy are found better than 70% RTR alloy due to higher dislocations density and formation of sub-grain structures in the CR alloy.

关键词： 6082 Al alloy Rolling Mechanical properties Fracture toughness J-Integral Material characterization

Consequence of reinforced SiC particles and post process artificial ageing on microstructure and mechanical properties of friction stir processed AA7075

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Defence Technology（防务技术） 2020年第5期16卷 1039-1050页

作者： H.A.Deore A.Bhardwaj A.G.Rao J.mishra v.D.Hiwarkar Department of Metallurgical and Materials Engineering Defence Institute of Advanced TechnologyPune411025India Naval Material Research Laboratory(NMRL) Defence Research Development OrganizationMinistry of DefenceAmbarnath414006India

Friction stir processing and post process artificial ageing was successfully carried out on AA7075 with and without reinforcement of SiC particles producing defect free processed zone with uniform distribution of filler *** of SiC particle reinforcement and artificial ageing times on the microstructural modifications was characterized using optical and electron microscopy,electron backscattered diffraction and X-Ray ***,impact and wear tests were carried out to investigate mechanical behaviour before and after *** of SiC particles during FSP and subsequent age hardening treatment brought about nearly twofold increase in hardness and impact toughness values by the combined effect of grain refinement,Zener pinning,dispersion strengthening and precipitation *** improvement in wear resistance in terms of wear loss was also observed after processing compared to the reference material *** surface of post FSP age hardened AA7075 alloy exhibited features of ductile fracture during Charpy impact test.

关键词： Friction stir processing EBSD Impact toughness Post process age hardening Zener pinning

Relating Maxwell's demon and quantitative analysis of information leakage for practical imperative programs

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Chinese Physics B 2017年第10期26卷 122-131页

作者： Kushal Anjaria Arun mishra Department of Computer Science & Engineering DIAT

Shannon observed the relation between information entropy and Maxwell demon experiment to come up with information entropy formula. After that, Shannon＇s entropy formula is widely used to measure information leakage in imperative programs. But in the present work, our aim is to go in a reverse direction and try to find possible Maxwell＇s demon experimental setup for contemporary practical imperative programs in which variations of Shannon＇s entropy formula has been applied to measure the information leakage. To establish the relation between the second principle of thermodynamics and quantitative analysis of information leakage, present work models contemporary variations of imperative programs in terms of Maxwell＇s demon experimental setup. In the present work five contemporary variations of imperative program related to information quantification are identified. They are：（i） information leakage in imperative program, （ii） imperative multi- threaded program, （iii） point to point leakage in the imperative program, （iv） imperative program with infinite observation, and （v） imperative program in the SOA-based environment. For these variations, minimal work required by an attacker to gain the secret is also calculated using historical Maxwell＇s demon experiment. To model the experimental setup of Maxwell＇s demon, non-interference security policy is used. In the present work, imperative programs with one-bit secret information have been considered to avoid the complexity. The findings of the present work from the history of physics can be utilized in many areas related to information flow of physical computing, nano-computing, quantum computing, biological computing, energy dissipation in computing, and computing power analysis.

关键词： information Maxwell's demon second principle of thermodynamics information security reversible system

Single-pulse ultrafast real-time simultaneous planar imaging of femtosecond laser-nanoparticle dynamics in flames

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Light(Science & Applications) 2024年第10期13卷 2312-2320页

作者： Yogeshwar Nath mishra Peng Wang Florian J.Bauer Murthy S.Gudipati Lihong v.Wang Caltech Optical Imaging Laboratory Andrew and Peggy Cheng Department of Medical EngineeringDepartment of Electrical EngineeringCalifornia Institute of Technology1200 East California BoulevardMail Code 138-78PasadenaCA 91125USA Science Division Jet Propulsion LaboratoryCalifornia Institute of Technology4800 Oak Grove DrivePasadenaCA 91109USA Lehrstuhl für Technische Thermodynamik(LTT)and Erlangen Graduate School in Advanced Optical Technologies(SAOT) Universität Erlangen-NürnbergErlangen 91058Germany

The creation of carbonaceous nanoparticles and their dynamics in hydrocarbon flames are still debated in environmental,combustion,and material *** this study,we introduce single-pulse femtosecond laser sheetcompressed ultrafast photography(fsLS-CUP),an ultrafast imaging technique specifically designed to shed light on and capture ultrafast dynamics stemming from interactions between femtosecond lasers and nanoparticles in flames in a ***-CUP enables the first-time real-time billion frames-per-second(Gfps)simultaneous twodimensional(2D)imaging of laser-induced fluorescence(LIF)and laser-induced heating(LIH)that are originated from polycyclic aromatic hydrocarbons(PAHs)and soot particles,***,fsLS-CUP provides the real-time spatiotemporal map of femtosecond laser-soot interaction as elastic light scattering(ELS)at an astonishing 250 *** contrast to existing single-shot ultrafast imaging approaches,which are limited to millions of frames per second only and require multiple laser pulses,our method employs only a single pulse and captures the entire dynamics of laserinduced signals at hundreds of *** a single pulse does not change the optical properties of nanoparticles for a following pulse,thus allowing reliable spatiotemporal ***,we found that particle inception and growth are derived from *** essence,as an imaging modality,fsLS-CUP offers ultrafast 2D diagnostics,contributing to the fundamental understanding of nanoparticle’s inception and broader applications across different fields,such as material science and biomedical engineering.

关键词： pulse scattering dynamics

Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM

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Frontiers of Structural and Civil Engineering 2015年第4期9卷 420-440页

作者： Sachin KUMAR A.S. SHEDBALE I. v. SINGH B.K. mishra Department of Mechanical and Industrial Engineering Indian institute of Technology Roorkee Roorkee 247667 India

In this paper, elasto-plastic XFEM simulations have been performed to evaluate the fatigue life of plane crack problems in the presence of various defects. The stress-strain response of the material is modeled by Ramberg-Osgood equation. The von-Mises failure criterion has been used with isotropic hardening. The J-integral for two fracture modes (mode-I and mode-II) is obtained by decomposing the displacement and stress fields into their symmetric and antisymmetric parts, then individual stress intensity factors are extracted from J-integral. The fatigue life obtained by EPFM is found quite close to that obtained by LEFM.

关键词： XFEM von-Mises yield criterion isotropic hardening fatigue crack growth J-integral