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Circuits and Systems 2020年第4期11卷 39-49页

作者： ghanshyam singh Department of Electronics and Communication Engineering Jayamukhi Institute of Technological Sciences Affiliated to JNTUH Warangal India

This paper presents a new first order all pass filter configurations. The proposed all pass filter configuration employs two configurations namely VDVTA and OTAs based first order all pass filter configuration. The first proposed configuration employs a single VDVTA and one grounded capacitor whereas the second proposed configuration employs two OTAs and one grounded capacitor. Both types of proposed configurations are fully electronically tunable and their quality factors do not depend on tunable pole frequency range. The reported configurations yield low active and passive sensitivities and also have low power consumption with very low supply voltage ± 0.85 V with Bias Voltage ± 0.50 V. The PSPICE simulation of the proposed VDVTA and two OTAs based first order all pass filter configurations are verified using 0.18 μm CMOS Technology Process Parameters.

关键词： Operational Transconductance Amplifier (OTA) Voltage Differencing Trans-conductance Amplifier (VDVTA) CMOS Technology

CMOS Realization of VDTA Based Electronically Tunable Wave Active Filter with Minimum Power Consumption at Low Supply Voltage ±0.82 V

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Circuits and Systems 2020年第2期11卷 11-26页

作者： ghanshyam singh Department of Electronics and Communication Engineering Jayamukhi Institute of Technological Sciences Affiliated to JNTUH Warangal India

This paper presents a higher order voltage and current mode low pass or high pass filter for wave active filter based on Voltage Differencing Transconductance Amplifiers (VDTAs). The wave equivalent variable technique and topological simulation as well as operational realization using wave variables techniques are proposed for basic active building blocks of wave active filters. The proposed wave equivalent technique is employed for wave active filter with the proper selection of the terminal connections. This work presented the basic element for the realizing wave active filter is the series inductor with parallel grounded capacitor. The proposed wave active filter is verified by realizing a 4th order low pass and high pass Butterworth filter with minimum power consumption at ±0.82 V using SPICE simulation with 0.18 μm TSMC CMOS technology parameters.

关键词： Wave Active Filter Voltage Differencing Transconductance Amplifier Voltage/Current Mode CMOS Technology

Chalcogenide photonic crystal fiber for ultraflat mid-infrared supercontinuum generation

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Chinese Optics Letters 2016年第12期14卷 141-145页

作者： Sandeep Vyas Takasumi Tanabe Manish Tiwari ghanshyam singh Department of ECE Vivekananda Institute of Technology (East) Department of EEE Keio University Department of ECE Manipal University Department of ECE Malaviya National Institute of Technology

In this Letter, we numerically simulate the generation of a 1–15 μm mid-infrared supercontinuum（SC） from a highly nonlinear Ge_（11.5）As24Se_（64.5）-based photonic crystal fiber（PCF）. This ultra-broadband SC is achieved in a100 mm long PCF pumped using 85 fs laser pulses operated at 3.1 μm and a peak pulse power of 3 k W. The proposed design offers a flat dispersion profile with two zero dispersion wavelengths. This broad and flat dispersion profile of the Ge_（11.5）As24Se_（64.5）PCF, combined with the high nonlinearity（2474 W-1km-1）, generates an ultra-broadband SC.

关键词： photonic pumped operated broadband nonlinearity numerically soliton silica pumping pitch

Porous Silicon Based Bragg-Grating Resonator for Refractive Index Biosensor

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Photonic Sensors 2018年第3期8卷 248-254页

作者： Sourabh SAHU Jalil ALI Preecha P. YUPAPIN ghanshyam singh Department of Electronics and Communication Engineering Malaviya National Institute of Technology Jaipur India Laser Centre IBNU SINA ISIR and Faculty of Science Universiti Teknologi Malaysia 81310 Johor Bahru Malaysia Computational Optics Group Advanced Institute of Material Science and Faculty of Electrical & Electronics Engineering Ton Duc Thang University Ho Chi Minh City Vietnam

In this work, we have evaluated the biosensing capability of the porous silicon （PSi） based sidewall Bragg-grating resonator. The approximation of the quasi-TE mode full vector for the eigenmode calculation is performed using a full vector mode solver. The transmission spectra of the device are evaluated using the transfer matrix method. We have observed a shift in the resonant band for a change in the refractive index of biomaterial in the upper cladding region. The theoretical value of the bulk sensitivity is calculated to be 387.48nm/RIU. The device is suitable for biosensing application due to its ability of interacting signal with the infiltrated analytes in the PSi waveguide core.

关键词： Biosensor evanescent field eigen mode

CMOS VDIBAs-Based Single-Resistance-Controlled Voltage-Mode Sinusoidal Oscillator

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Circuits and Systems 2017年第1期8卷 14-22页

作者： Kanhaiya Lal Pushkar ghanshyam singh Rajendra Kumar Goel Department of Electronics and Communication Engineering Maharaja Agrasen Institute of Technology New Delhi India Department of Electronics and Communication Engineering HMR Institute of Technology and Management (HMRIT) Delhi India

In this communication, a new single-resistance controlled sinusoidal oscillator (SRCO) has been presented. The presented SRCO uses two voltage differencing inverting buffered amplifiers (VDIBAs), one resistor and two capacitors in which one is grounded (GC) and the other one is floating (FC). The proposed structure offers the following advantageous features: 1) independent control of oscillation condition (OC) and oscillation frequency (OF);2) low passive and active sensitivities and 3) very good frequency stability. The non-ideal effects of the VDIBA on the proposed oscillator have also been investigated. The proposed SRCO has been tested for its robustness using Monte-Carlo simulations. The check of the validity of the presented SRCO has been established by SPICE simulations using 0.18 μm TSMC technology.

关键词： Sinusoidal Oscillator Voltage Differencing Inverting Buffered Amplifier Voltage-Mode Circuits Analog Circuit Design

Single VDVTA-Based Voltage-Mode Biquad Filter

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Circuits and Systems 2015年第3期6卷 55-59页

作者： ghanshyam singh Dinesh Prasad D. R. Bhaskar Department of Electronics and Communication Engineering HMRITM Hamidpur Delhi India Department of Electronics and Communication Engineering Faculty of Engineering and Technology Jamia Millia Islamia New Delhi India

In this paper, an application of voltage differencing voltage transconductance amplifier (VDVTA) in the realization of voltage-mode (VM) multi-input single output (MISO) type biquad is presented. The proposed topology uses one VDVTA as an active element, two capacitors and a grounded resistor. The configuration realizes low pass (LP), high pass (HP), band pass (BP) and notch (BR) filters without the requirement of any matching condition. The natural frequency (w0) and bandwidth (BW) are independently controllable. The proposed circuit offers low active and passive sensitivities of w0. The operation of the proposed circuit has been verified through SPICE simulation with TSMC CMOS 0.18 μm process parameters.

关键词： Voltage Differencing Voltage Transconductance Amplifier Analog Filter LP HP BP BR Voltage Mode

印度铁路的机车改造工程——内燃机车改造为电力机车

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国外铁道机车与动车 2020年第4期 7-9页

作者：【印度】ghanshyam singh 杨嘉琪(译) 田睿(校) 不详

印度铁路正在实施大规模的电气化改造,为实现资产的再利用和费用最小化,决定对其内燃机车车队进行改造——改装为电力机车。文章介绍了改造项目的背景、进程以及前景,将原型内燃机车与在其基础上制造的电力机车进行了参数对比,分析了改... 详细信息

印度铁路正在实施大规模的电气化改造,为实现资产的再利用和费用最小化,决定对其内燃机车车队进行改造——改装为电力机车。文章介绍了改造项目的背景、进程以及前景,将原型内燃机车与在其基础上制造的电力机车进行了参数对比,分析了改造型机车在节能降本方面的优势。

关键词：印度铁路内燃机车电力机车改造

Image Segmentation Based on Block Level and Hybrid Directional Local Extrema

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Computers, Materials & Continua 2022年第2期70卷 3939-3954页

作者： ghanshyam Raghuwanshi Yogesh Gupta Deepak Sinwar Dilbag singh Usman Tariq Muhammad Attique Kuntha Pin Yunyoung Nam Manipal University Jaipur Jaipur302026India BMLMunjal University GurugramIndia Bennett University Greater NoidaIndia College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityAl-KhrajSaudi Arabia Department of Computer Science HITEC University TaxilaTaxilaPakistan Department of ICT Convergence Soonchunhyang UniversityAsan 31538Korea Department of Computer Science and Engineering Soonchunhyang UniversityAsanKorea

In the recent decade,the digitalization of various tasks has added great flexibility to human lifestyle and has changed daily routine activities of *** segmentation is a key step in *** plays a key role in almost all areas of image processing,and various approaches have been proposed for image *** this paper,a novel approach is proposed for image segmentation using a nonuniform adaptive ***-based image segmentation along with a directional binary pattern generated a better segmented *** adaptive mask of 8×8 was circulated over the pixels whose bit value was 1 in the generated directional binary *** was performed in three phases:first,an image was divided into sub-images or image chunks;next,the image patches were taken as input,and an adaptive threshold was generated;and finally the image chunks were processed separately by convolving the adaptive mask on the image *** and Laplacian of Gaussian algorithms along with directional extrema patterns provided a double check for boundary *** proposed approach was tested on chunks of varying sizes,and after multiple iterations,it was found that a block size of 8×8 performs better than other chunks or block *** accuracy of the segmentation technique was measured in terms of the count of ill regions,which were extracted after the segmentation process.

关键词： Image segmentation HDEP block-level processing adaptive threshold

Validation of Vesical Imaging Reporting and Data System score for the diagnosis of muscle-invasive bladder cancer: A prospective cross-sectional study

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Asian Journal of Urology 2022年第4期9卷 467-472页

作者： Kumawat ghanshyam Vyas Nachiket Sharma Govind Priyadarshi Shivam Gupta Bhagwan Sahay Singla Mohit Kumar Ashok Department of Urology Sawai Man Singh Medical College and HospitalJaipurRajasthanIndia

Objective:Vesical Imaging Reporting and Data System(VIRADS)score was developed to standardize the reporting and staging of bladder tumors on pre-operative multiparametric magnetic resonance *** helps in avoiding unnecessary repeat transurethral resection of bladder tumor in high-risk non-muscle-invasive bladder cancer *** study was done to determine the validity of VIRADS score prospectively for the diagnosis of muscleinvasive bladder ***:This study was conducted from March 2019 to March 2020 at Sawai Man singh Medical College and Hospital,Jaipur,Rajasthan,*** admitted with the provisional diagnosis of bladder tumor were included as *** these patients underwent a 3 Tesla mpMRI to obtain a VIRADS score before they underwent transurethral resection of bladder tumor and these data were analyzed to evaluate the correlation of pre-operative VIRADS score with mus-cle invasiveness of the tumor in final biopsy ***:A cut-off of VIRADS≥4 for prediction of detrusor muscle invasion yielded a sensitivity of 79.4%,specificity of 94.2%,positive predictive value of 90.0%,negative predictive value of 87.5%,and diagnostic accuracy of 86.4%.A cut off of VIRADS≥3 for prediction of detrusor muscle invasion yielded a sensitivity of 91.2%,specificity of 78.8%,positive predictive value of 73.8%,negative predictive value of 93.2%,and accuracy of 83.7%.The receiver operating curve showed the area under the curve to be 0.922(95%confidence interval:0.862e0.983).Conclusion:VIRADS score appears to be an excellent and effective pre-operative radiological tool for the prediction of detrusor muscle invasion in bladder cancer.

关键词： Vesical Imaging Reporting and Data System Bladder tumor Multiparametric magnetic resonance imaging Detrusor invasion

COVID-19 pandemic effects on the distribution of healthcare services in India: A systematic review

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World Journal of Virology 2022年第4期11卷 186-197页

作者： Nirav Nimavat Mohammad Mehedi Hasan Sundip Charmode Gowthamm Mandala ghanshyam R Parmar Ranvir Bhangu Israr Khan Shruti singh Amit Agrawal Ashish Shah Vishi Sachdeva Department of Community Medicine Dr.Kiran C Patel Medical College and Research InstituteBharuch 392001India Department of Biochemistry and Molecular Biology Mawlana Bhashani Science and Technology UniversityTangail 1902Bangladesh Department of Anatomy All India Institute of Medical SciencesRajkot 360006GujaratIndia Independent Researcher Centre Groove High SchoolGreenwoodIN 46143United States Department of Pharmacy Sumandeep VidyapeethVadodara 391760India Department of Medical Caribbean Medical UniversityDes PlainesIL 60018United States Shifa International Hospital Islamabad 999010Pakistan Department of Pharmacology All India Institute of Medical SciencesPatna 801507India Department of Paediatrics Gandhi Medical CollegeBhopal 462001India Department of Medical Adesh Institute of Medical Sciences and ResearchBathinda 151009India

BACKGROUND The coronavirus disease 2019(COVID-19)pandemic has brought fundamental changes to our problems and priorities,especially those related to the healthcare *** was one of the countries severely affected by the harsh consequences of the COVID-19 *** To understand the challenges faced by the healthcare system during a *** The literature search for this review was conducted using PubMed,EMBASE,Scopus,Web of Science,and Google *** also used Reference Citation Analysis(RCA)to search and improve the *** focused on the published scientific articles concerned with two major vital areas:(1)The Indian healthcare system;and(2)COVID-19 pandemic effects on the Indian healthcare *** The Indian healthcare system was suffering even before the *** pandemic has further stretched the healthcare services in *** main obstacle in the healthcare system was to combat the rising number of communicable as well as noncommunicable *** the pandemic measures,there was a diversion of focus of the already established healthcare services away from the chronic conditions and *** disruption of the vaccination services may have more severe short and long-term consequences than the pandemic’s adverse *** Severely restricted resources limited the interaction of the Indian healthcare system with the COVID-19 ***-establishment of primary healthcare services,maternal and child health services,noncommunicable diseases programs,National Tuberculosis Elimination Program,*** important to prevent serious long-term consequences of this pandemic.

关键词： COVID-19 Healthcare system Pandemic India Healthcare services