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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

NDC-IVM:An automatic segmentation of optic disc and cup region from medical images for glaucoma detection

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Journal of Innovative Optical Health Sciences 2017年第3期10卷 118-132页

作者： Umarani balakrishnan Department of ECE Trichy Engineering College Sivagnanam NagarKonalaiTrichyTamil Nadu 621132India

Glaucoma is an eye disease that usually occurs with the increased Intra-Ocular Pressure(IOP),which damages the vision of ***,detecting and classifying Glaucoma is an important and demanding task in recent *** this purpose,some of the clustering and segmentation techniques are proposed in the existing ***,it has some drawbacks that include ineficient,inaccurate and estimates only the affected *** order to solve these issues,a Neighboring Differential Clustering(NDC)-Intensity V ariation Making(IVM)are proposed in this *** main intention of this work is to extract and diagnose the abnormal retinal image by identifying the optic *** work includes three stages such as,preprocessing,clustering and *** first,the given retinal image is preprocessed by using the Gaussian Mask Updated(GMU)model for eliminating the noise and improving the quality of the ***,the cluster is formed by extracting the threshold and patterns with the help of NDC *** the segmentation stage,the weight is calculated for pixel matching and ROI extraction by using the proposed IVM ***,the novelty is presented in the clustering and segmentation processes by developing NDC and IVM algorithms for accurate Glaucoma *** experiments,the results of both existing and proposed techniques are evaluated in terms of sensitivity,specificity,accuracy,Hausdorff distance,Jaccard and dice metrics.

关键词： Glaucoma detection optic disc Gaussian mask updated neighboring differential clustering intensity variation masking retinal image.

Concatenated deleting machines and their characteristics

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Communications in Theoretical Physics 2023年第3期75卷 48-55页

作者： A Nancy S balakrishnan Department of Physics School of Advanced SciencesVellore Institute of TechnologyVellore 632014Tamil NaduIndia

In this work,we study the performance of one shot and concatenated deleting machines(DMs).We show that the output state of one shot DMs are mixed inseparable,and do not violate Bell's inequality but can be used as a teleportation channel for all values of the input state *** the other hand,we observe in the concatenation of different DMs that the output states are mixed inseparable and do not violate Bell's inequality,and cannot be used as a teleportation ***,some important attributes such as inseparability,violation of Bell's inequality,and teleportation fidelity of the DMs remain unchanged under the order of *** this context of a teleportation channel,one shot DMs are useful when compared to concatenated DMs.

关键词： Pati-Braunstein deleting machine concatenated deleting machine teleportation fidelity Bell's inequality

Representations for reliability functions of conditional coherent systems with INID components and ordered properties

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Journal of Systems Engineering and Electronics 2015年第6期26卷 1316-1324页

作者： Zhengcheng Zhang Narayanaswamy balakrishnan School of Mathematics and Physics Lanzhou Jiaotong University Department of Mathematics and Statistics Mc Master University

This paper presents several useful mixture representations for the reliability function of the residual live of a coherent system with independent but non-identically distributed components. These presentations are based on order statistics, signatures and mean reliability functions. We then discuss some stochastic comparisons of residual lives between two systems based on the stochastic ordering of coefficient vectors （or components） of the two systems. These results form nice extensions of some known results for the case of independent and identically distributed components.

关键词： mixture independent but non-identically distributed(INID) stochastic order signature residual life mean reliabilityfunction order statistics.

Om:One tool for many (Indian) languages

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第11期6卷 1348-1353页

作者： GANAPATHIRAJU Madhavi balakrishnan Mini balakrishnan N. REDDY Raj Language Technologies Institute Carnegie Mellon University Pittsburgh PA 15213 USASupercomputer Education and Research Centre Indian Institute of Science Bangalore 560 012 IndiaSupercomputer Education and Research Centre Indian Institute of Science Bangalore 560 012 IndiaLanguage Technologies Institute Carnegie Mellon University Pittsburgh PA 15213 USA

Many different languages are spoken in India, each language being the mother tongue of tens of millions of people. While the languages and scripts are distinct from each other, the grammar and the alphabet are similar to a large extent. One common feature is that all the Indian languages are phonetic in nature. In this paper we describe the development of a translit- eration scheme Om which exploits this phonetic nature of the alphabet. Om uses ASCII characters to represent Indian language alphabets, and thus can be read directly in English, by a large number of users who cannot read script in other Indian languages than their mother tongue. It is also useful in computer applications where local language tools such as email and chat are not yet available. Another significant contribution presented in this paper is the development of a text editor for Indian languages that integrates the Om input for many Indian languages into a word processor such as Microsoft WinWord?. The text editor is also developed on Java? platform that can run on Unix machines as well. We propose this transliteration scheme as a possible standard for Indian language transliteration and keyboard entry.

关键词： Om transliteration Indian language technologies Text editor

Universal Digital Library—Future research directions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第11期6卷 1204-1205页

作者： balakrishnan N. Supercomputer Education and Research Centre Indian Institute of Science Bangalore 560 012 India

This paper starts with a description of the present status of the Digital Library of India Initiative. As part of this initiative large corpus of scanned text is available in many Indian languages and has stimulated a vast amount of research in Indian language technology briefly described in this paper. Other than the Digital Library of India Initiative which is part of the Million Books to the Web Project initiated by Prof Raj Reddy of Carnegie Mellon University, there are a few more initiatives in India towards taking the heritage of the country to the Web. This paper presents the future directions for the Digital Library of India Initiative both in terms of growing collection and the technical challenges in managing such large collection poses.

关键词： Digital Library Search engines Language technology

Contrast Enhancement Based Image Detection Using Edge Preserved Key Pixel Point Filtering

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Computer Systems Science & Engineering 2022年第8期42卷 423-438页

作者： balakrishnan Natarajan Pushpalatha Krishnan Department of Master of Computer Applications Sona College of TechnologySalem–636005India Department of Computer Applications SRM Institute of Science and TechnologyRamapuramChennai600089India

In existing methods for segmented images,either edge point extraction or preservation of edges,compromising contrast images is so sensitive to *** Degeneration Threshold Image Detection(DTID)framework has been proposed to improve the contrast of edge filtered ***,DTID uses a Rapid Bilateral Filtering process for filtering edges of contrast *** filter decomposes input images into base layers in the DTID *** minimal filtering time,Rapid Bilateral Filtering handles high dynamic contrast images for smoothening edge *** the DTID framework,Rapid Bilateral Filtering with Shift-Invariant Base Pass Domain Filter is insensitive to *** Shift-Invariant Filtering estimates value across edges for removing outliers(i.e.,noise preserving base layers of the contrast image).The intensity values are calculated in the base layer of the contrast image for accurately detecting nearby spatial locations using Shift-Invariant base Pass Domain Filter(SIDF).At last,Affine Planar Transformation is applied to detect edge filtered contrast images in the DTID framework for attaining a high quality of the *** normalizes the translation and rotation of *** this,Degeneration Threshold Image Detection maximizes average contrast enhancement quality and performs an experimental evaluation of factors such as detection accuracy,rate,and filtering time on contrast *** analysis shows that the DTID framework reduces the filtering time taken on contrast images by 54%and improves average contrast enhancement quality by 27%compared to GUMA,HMRF,SWT,and *** provides better performance on the enhancement of average contrast enhancement quality by 28%,detection accuracy rate by 26%,and reduction in filtering time taken on contrast images by 30%compared to state-of-art methods.

关键词： Rapid bilateral filtering edge preserved filtering affine planar transformation key pixel point localization shift-invariant base pass domain filter

Approximate dynamic programming solutions with a single network adaptive critic for a class of nonlinear systems

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控制理论与应用（英文版） 2011年第3期9卷 370-380页

作者： S.N.balakrishnan Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology

Approximate dynamic programming(ADP) formulation implemented with an adaptive critic(AC)-based neural network(NN) structure has evolved as a powerful technique for solving the Hamilton-Jacobi-Bellman(HJB) *** interest in ADP and the AC solutions are escalating with time,there is a dire need to consider possible enabling factors for their implementations.A typical AC structure consists of two interacting NNs,which is computationally *** this paper,a new architecture,called the ’cost-function-based single network adaptive critic(J-SNAC)’ is presented,which eliminates one of the networks in a typical AC *** approach is applicable to a wide class of nonlinear systems in *** order to demonstrate the benefits and the control synthesis with the J-SNAC,two problems have been solved with the AC and the J-SNAC *** are presented,which show savings of about 50% of the computational costs by J-SNAC while having the same accuracy levels of the dual network structure in solving for optimal ***,convergence of the J-SNAC iterations,which reduces to a least-squares problem,is discussed;for linear systems,the iterative process is shown to reduce to solving the familiar algebraic Ricatti equation.

关键词： Approximate dynamic programming Optimal control Nonlinear control Adaptive critic Cost-functionbased single network adaptive critic J-SNAC architecture

An Identity for Expectations and Characteristic Function of Matrix Variate Skew-normal Distribution with Applications to Associated Stochastic Orderings

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Communications in Mathematics and Statistics 2023年第3期11卷 629-647页

作者： Tong Pu Narayanaswamy balakrishnan Chuancun Yin School of Statistics Qufu Normal UniversityQufu273165ShandongPeople’s Republic of China Department of Mathematics and Statistics McMaster UniversityHamiltonOntarioCanada

We establish an identity for E f(Y)-E f(X),when X and Y both have matrix variate skew-normal distributions and the function f satisﬁes some weak *** characteristic function of matrix variate skew normal distribution is then *** then make use of it to derive some necessary and sufﬁcient conditions for the comparison of matrix variate skew-normal distributions under six different orders,such as usual stochastic order,convex order,increasing convex order,upper orthant order,directionally convex order and supermodular order.

关键词： Characteristic function Integral order Matrix variate skew-normal distributions Stochastic comparisons