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Management of hypersplenism in non-cirrhotic portal hypertension:a surgical series

Hepatobiliary & Pancreatic Diseases International 2012年第2期11卷 165-171页

作者： Rajesh Rajalingam amit Javed Dharmanjay Sharma Puja Sakhuja Shivendra Singh Hirdaya H Nag Anil K agarwal Department of Gastrointestinal Surgery G. B. Pant Hospital and Maulana Azad Medical College Delhi University New Delhi India Department of Pathology G. B. Pant Hospital and Maulana Azad Medical College Delhi University New Delhi India

BACKGROUND:Hypersplenism is commonly seen in patients with non-cirrhotic portal hypertension(NCPH).While a splenectomy alone can effectively relieve the hypersplenism,it does not address the underlying portal *** present study was undertaken to analyze the impact of shunt and non-shunt operations on the resolution of hypersplenism in patients with *** relationship of symptomatic hypersplenism,severe hypersplenism and number of peripheral cell line defects to the severity of portal hypertension and outcome was also ***:A retrospective analysis of NCPH patients with hypersplenism managed surgically between 1999 and 2009 at our center was *** 252 patients with NCPH,64(45 with extrahepatic portal vein obstruction and 19 with non-cirrhotic portal fibrosis) had hypersplenism and constituted the study *** analysis was done using GraphPad *** and continuous variables were compared using the chi-square test,ANOVA,and Student’s t *** MannWhitney U test and Kruskal-Wallis test were used to compare non-parametric ***:The mean age of patients in the study group was 21.81±6.1 *** was symptomatic in 70.3% with an incidence of spontaneous bleeding at 26.5%,recurrent anemia at 34.4%,and recurrent infection at 29.7%.The mean duration of surgery was 4.16±1.9 hours,intraoperative blood loss was 457±126(50-2000) mL,and postoperative hospital stay 5.5±1.9 *** surgery,normalization of hypersplenism occurred in all *** long-term followup,none of the patients developed hepatic encephalopathy and 4 had a variceal re-bleeding(2 after a splenectomy alone,1 each after an esophago-gastric devascularization and proximal splenorenal shunt).Patients with severe hypersplenism and those with defects in all three peripheral blood cell lineages were older,had a longer duration of symptoms,and a higher incidence of variceal bleeding and postoperative *** addition,patients with t

关键词： portal hypertension hypersplenism splenorenal shunt lienorenal shunt

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Development of port fuel injected methanol(M85)-fuelled two-wheeler for sustainable transport

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第3期7卷 298-311页

作者： Tushar agarwal Akhilendra Pratap Singh Avinash Kumar agarwal Engine R esearch Laboratory Department of Mechanical EngineeringIndian Institute of Technology KanpurKanpur 208016India

Due to increasingly stringent environmental pollution norms,there is a need for alternate combustion techniques and alternate fuels to keep up with changing *** of the viable solutions for India is the adaptation of methanol as a fuel for automotive ***,in this study a functional two-wheeler prototype was developed,which uses M85(85%v/v methanol and 15%v/v gasoline)in an electronic control unit(ECU)controlled port fuel injected(PFI)*** study included comparative investigations of simulated on-road two-wheeler performance on chassis dynamometer using a gasoline-fuelled motorcycle with stock ECU vis-a-vis M85-fuelled motorcycle using recalibrated *** recalibration exhibited that M85-fuelled vehicle was operated at relatively more advanced spark timing compared to baseline gasoline-fuelled *** results showed that M85-fuelled motorcycle produced relatively higher engine power and higher maximum vehicle speed compared to gasoline-fuelled *** superior acceleration characteristics(especially at higher speeds)of M85-fuelled motorcycle was another important finding of this study,indicating that M85 provided superior throttle response compared to *** analysis of raw tailpipe emissions showed that modified M85-fuelled motorcycle emitted relatively higher hydrocarbon(HC),carbon monoxide(CO)and oxides of nitrogen(NO_x)emissions compared to stock gasoline-fuelled ***,these emissions can be controlled by using adaptation of suitable after-treatment systems.

关键词： Methanol Electronic control unit(ECU) Electronic fuel injection(EFI) ECU calibration Engine performance Emission

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Effect of stacking sequence on physical, mechanical and tribological properties of glass-carbon hybrid composites

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Friction 2014年第4期2卷 354-364页

作者： Gaurav agarwal Amar PATNAIK Rajesh kumar SHARMA Jyoti agarwal Department of Mechanical Engineering Invertis UniversityBareillyIndia Department of Mechanical Engineering National Institute of Technology(NIT)HamirpurIndia Department of Computer Engineering Rajshree Institute of Management&Technology(RIMT)BareillyIndia

A study was done to determine the effect of best stacking sequence(position and orientation)on the mechanical properties,friction and wear response of hybrid *** main purpose of the study was to determine the best available stacking sequence for which the physical,mechanical and three body abrasive wear rate is *** for mechanical properties(tensile strength,flexural strength,inter laminar shear strength,impact strength and hardness)was done on glass-carbon hybrid *** composites were then subjected to test for three body abrasive wear on a designed experimental *** different factors(sliding velocity,fabric weight percentage,normal load,sliding distance and abrasive particle size)varied in steps to evaluate the friction and three body abrasive wear response of the *** design of experiment using Taguchi’s orthogonal array and analysis of variance(ANOVA)was applied to find out minimum specific wear *** results revealed the significance in arrangement of two different layers of fabric(glass and carbon)and the difference in properties obtained by *** Taguchi experimental analysis it has been observed that three body abrasive wear rate is minimum at 72 cm/s sliding velocity,30 wt.%fabric content,80 N normal load,90 m sliding distance and 125μm abrasive particle *** scanning electron microscope(SEM)studies revealed the dynamics of three‐body abrasive wear and underlying micro‐mechanisms that result in the analysis of three body abrasive wear.

关键词： hybrid composite stacking sequence Taguchi’s method wear mechanism

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An Adaptive Genetic Algorithm-Based Load Balancing-Aware Task Scheduling Technique for Cloud Computing

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Computers, Materials & Continua 2022年第12期73卷 6103-6119页

作者： Mohit agarwal Shikha Gupta Deptartment of Computer Science&Engineering School of Engineering&TechnologySharda UniversityGreater NoidaUttar Pradesh201319India Department of Information Technology Maharaja Agrasen Institute of TechnologyDelhi110086India

Task scheduling in highly elastic and dynamic processing environments such as cloud computing have become the most discussed problem among *** scheduling algorithms are responsible for the allocation of the tasks among the computing resources for their execution,and an inefficient task scheduling algorithm results in under-or over-utilization of the resources,which in turn leads to degradation of the ***,in the proposed work,load balancing is considered as an important criterion for task scheduling in a cloud computing environment as it can help in reducing the overhead in the critical decision-oriented *** this paper,we propose an adaptive genetic algorithm-based load balancing(GALB)-aware task scheduling technique that not only results in better utilization of resources but also helps in optimizing the values of key performance indicators such as makespan,performance improvement ratio,and degree of *** concept of adaptive crossover and mutation is used in this work which results in better adaptation for the fittest individual of the current generation and prevents them from the *** simulator has been used to carry out the simulations and obtained results establish that the proposed GALB algorithm performs better for all the key indicators and outperforms its peers which are taken into the consideration.

关键词： Cloud computing genetic algorithm(GA) load balancing makespan resource utilization task scheduling

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New solutions for old challenges in glaucoma treatment:is taurine an option to consider?

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Neural Regeneration Research 2021年第5期16卷 967-971页

作者： Igor Iezhitsa Renu agarwal School of Medicine International Medical UniversityKuala LumpurMalaysia Volgograd State Medical University Research Centre for Innovative MedicinesVolgogradRussian Federation

Glaucoma is a range of progressive optic neuropathies characterized by progressive retinal ganglion cell loss and visual field *** is recognized as a leading cause of irreversible blindness affecting more than 70 million people ***,reduction of intraocular pressure,a widely recognized risk factor for glaucoma development,is the only pharmacological strategy for slowing down retinal ganglion cell loss and disease ***,retinal ganglion cell death and visual field loss have been observed in normotensive glaucoma,suggesting that the disease process is partially independent of intraocular *** is one of the agents that have attracted attention of researchers *** has been shown to be involved in multiple cellular functions,including a central role as a neurotransmitter,as a trophic factor in the central nervous system development,as an osmolyte,as a neuromodulator,and as a *** also plays a role in the maintenance of the structural integrity of the membranes and in the regulation of calcium transport and *** is known to prevent N-methyl-D-aspartic acid-induced excitotoxic injury to retinal ganglion cells.A recently published study clearly demonstrated that taurine prevents retinal neuronal apoptosis both in vivo and in *** effect of taurine may be attributed to direct inhibition of apoptosis,an activation of brain derived neurotrophic factor-related neuroprotective mechanisms and reduction of retinal oxidative and nitrosative *** studies are needed to fully explore the potential of taurine as a neuroprotective agent,so that it can be applied in clinical practice,particularly for the treatment of *** objective of current review was to summarize recent evidence on neuroprotective properties of taurine in glaucoma.

关键词： apoptosis excitotoxicity glaucoma oxidative and nitrosative stresses retinal neuroprotection taurine

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Self-aligned on-chip coupled photonic devices using individual cadmium sulfide nanobelts

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Nano Research 2020年第5期13卷 1413-1418页

作者： Jacob S.Berger Ho-Seok Ee Mingliang Ren Daksh agarwal Wenjing Liu Ritesh agarwal 3231 Walnut St. Department of Materials Science and EngineeringUniversity of PennsylvaniaPhiladelphia 19104USA

Nanowires(NWs)and nanobelts(NBs)have been widely studied and fabricated into a variety of nanoscale devices such as light emitting diodes(LEDs),lasers and *** unique materials have attracted sustained attention due to their novel properties,ease of growth,and the ability to fabricate highly engineered ***,their widespread application remains hindered due to the difficulty in integrating multiple NWs or NBs together for more complex *** of multiple NWs and NBs together on the same chip can enable the coupling of different devices to help realize complex on-chip architectures such as photonic integrated circuits or nanoscale diagnostic tools,which currently require outcoupling using larger *** this letter we report the coupling of on-chip NB LEDs and photodetectors using a single,precisely self-aligned,cadmium sulfide(CdS)NB fabricated on a silicon-on-insulator(SOI)*** generated by the CdS NB is waveguided and measured across the self-aligned device and demonstrates an on/off ratio of 10^2-10^*** work describes a new method for fabricating and integrating more complex nanoscale devices that can enable advances in areas such as on-chip optical computational components and nanoscale optical biodiagnostics.

关键词： cadmium sulfide nanobelts nanowires light emitting diode optical interconnects

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Discrete Event System Framework for Fault Diagnosis with Measurement Inconsistency:Case Study of Rogue DHCP Attack

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IEEE/CAA Journal of Automatica Sinica 2019年第3期6卷 789-806页

作者： Mayank agarwal Santosh Biswas Sukumar Nandi IEEE the Department of Computer Science and Engineering Indian Institute of Technology Guwahati

Fault detection and diagnosis(FDD) facilitates reliable operation of systems. Various approaches have been proposed for FDD like Analytical redundancy(AR), Principal component analysis(PCA), Discrete event system(DES) model etc., in the literature. Performance of FDD schemes greatly depends on accuracy of the sensors which measure the system *** to various reasons like faults, communication errors etc.,sensors may occasionally miss or report erroneous values of some system parameters to FDD engine, resulting in measurement inconsistency of these parameters. Schemes like AR, PCA etc.,have mechanisms to handle measurement inconsistency, however,they are computationally heavy. DES based FDD techniques are widely used because of computational simplicity, but they cannot handle measurement inconsistency efficiently. Existing DES based schemes do not use Measurement inconsistent(MI)parameters for FDD. These parameters are not permanently unmeasurable or erroneous, so ignoring them may lead to weak diagnosis. To address this issue, we propose a Measurement inconsistent discrete event system(MIDES) framework, which uses MI parameters for FDD at the instances they are measured by the sensors. Otherwise, when they are unmeasurable or erroneously reported, the MIDES invokes an estimator diagnoser that predicts the state(s) the system is expected to be in, using the subsequent parameters measured by the other sensors. The efficacy of the proposed method is illustrated using a pumpvalve system. In addition, an MIDES based intrusion detection system has been developed for detection of rogue dynamic host configuration protocol(DHCP) server attack by mapping the attack to a fault in the DES framework.

关键词： Fault diagnosis instrasion detection system (IDS) measurement inconsistent discrete event system (DES) rogue dynamic host configuration protocol (DHCP) server

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Analysis of periodic and aperiodic convective stability of double diffusive nanofluid convection in rotating porous layer

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Applied Mathematics and Mechanics(English Edition) 2016年第2期37卷 215-226页

作者： S.agarwal P.RANA Department of Mathematics Amity Institute of Applied SciencesAmity University Department of Mathematics Jaypee Institute of Information Technology

The onset of periodic and aperiodic convection in a binary nanofiuid satu- rated rotating porous layer is studied considering constant flux boundary conditions. The porous medium obeys Darcy＇s law, while the nanofluid envisages the effects of the Brow- nian motion and thermophoresis. The Rayleigh numbers for stationary and oscillatory convection are obtained in terms of various non-dimensional parameters. The effect of the involved physical parameters on the aperiodic convection is studied graphicMly. The results are validated in comparison with the published literature in limiting cases of the present study.

关键词： nanofluid rotating porous medium natural convection thermophoreticflux

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Performance analysis and design of MIMO-OFDM system using concatenated forward error correction codes

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Journal of Central South University 2017年第6期24卷 1322-1343页

作者： Arun agarwal Saurabh N.Mehta PhD Scholar School of Electrical EngineeringDepartment of Information TechnologyAMET UniversityTamil NaduChennai 603112India Department of Electronics and Telecommunication Engineering Vidyalankar Institute of TechnologyMumbai-400037MaharashtraIndia

This work investigates the performance of various forward error correction codes, by which the MIMO-OFDM system is deployed. To ensure fair investigation, the performance of four modulations, namely, binary phase shift keying(BPSK), quadrature phase shift keying(QPSK), quadrature amplitude modulation(QAM)-16 and QAM-64 with four error correction codes(convolutional code(CC), Reed-Solomon code(RSC)+CC, low density parity check(LDPC)+CC, Turbo+CC) is studied under three channel models(additive white Guassian noise(AWGN), Rayleigh, Rician) and three different antenna configurations(2×2, 2×4, 4×4). The bit error rate(BER) and the peak signal to noise ratio(PSNR) are taken as the measures of performance. The binary data and the color image data are transmitted and the graphs are plotted for various modulations with different channels and error correction codes. Analysis on the performance measures confirm that the Turbo + CC code in 4×4 configurations exhibits better performance.

关键词： bit error rate (BER) convolutional code (CC) forward error correction peak signal to noise ratio (PSNR) Turbo code

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Magnesium acethyltaurate as a potential agent for retinal and optic nerve protection in glaucoma

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Neural Regeneration Research 2018年第5期13卷 807-808页

作者： Igor Iezhitsa Renu agarwal Centre for Neuroscience Research Faculty of Medicine Universiti Teknologi MARA Volgograd State Medical University Research Institute of Pharmacology

Glaucoma is the second leading cause of irreversible vision impairment affecting more than 70 million people worldwide with approximately 10%suffering from glaucoma-related bilateral blind（Quigley and Broman,2006）.It is a multi-factorial disease that is characterized by optic nerve damage and visual field *** loss of retinal ganglion cells（RGCs）resulting in visual field deficits is the hallmark of glaucoma.

关键词： Magnesium acethyltaurate as a potential agent for retinal and optic nerve protection in glaucoma

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