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Atomic-level Insights into the Sponge-like Behavior of Cartilage towards Dehydration by Time-resolved Solid State NMR Spectroscopy

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Atomic-level Insights into the Sponge-like Behavior of Carti...

第十七届国际生物物理大会;第十二届中国生物物理大会

作者： Michael Morris ayyalusamy ramamoorthy

Cartilage plays a very important role in the function of musculoskeletal ***,a molecular-level understanding of the normal functioning of articular cartilage will be useful to develop treatment and prevention

关键词： cartilage NMR hydration

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多相聚合物体系的固体NMR研究

多相聚合物体系的固体NMR研究

第十一届全国高聚物分子与结构表征学术研讨会

作者：张荣纯李妹 Kay Saalwaechter ayyalusamy ramamoorthy 孙平川华南理工大学华南软物质科学与技术高等研究院功能高分子材料教育部重点实验室化学学院南开大学马丁-路德大学物理系密歇根大学生物物理及化学系

多相聚合物体系在聚合物材料中普遍存在,比如聚氨酯,嵌段共聚物,聚合物共混物,聚合物纳米复合材料等。认识这些多相聚合物体系的微观结构和动力学对理解材料的宏观性质非常重要,并可进一步为材料的分子设计提供指导。这里,以基于Diels-A... 详细信息

多相聚合物体系在聚合物材料中普遍存在,比如聚氨酯,嵌段共聚物,聚合物共混物,聚合物纳米复合材料等。认识这些多相聚合物体系的微观结构和动力学对理解材料的宏观性质非常重要,并可进一步为材料的分子设计提供指导。这里,以基于Diels-Alder反应交联形成的聚氨酯为例,系统阐述近几年我们发展的一些研究多相聚合物材料的固体NMR方法,包括多相聚合物体系中不同组分含量的确定,定量表征交联网络结构和缺陷含量,交联-解交联过程的实时监控,多相聚合物体系的13C NMR信号的增强等。最后通过恰当的分子设计,我们设计合成了一种高性能可再加工的交联聚氨酯材料。

关键词： Multiphase Polymer Solid-State NMR Polyurethane Structure Dynamics

增强多相聚合物中柔性相组分信号的固体NMR新方法

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增强多相聚合物中柔性相组分信号的固体NMR新方法

2021第二十一届全国波谱学学术年会

作者：张荣纯王皓李东甲李燕南 Yusuke Nishiyama ayyalusamy ramamoorthy 华南软物质科学与技术高等研究院分子科学与工程学院华南理工大学 NMR Science and Development Division RIKEN SPring-8 Center Nanocrystallography unit RIKEN-JEOL Collaboration Center JEOL RESONANCE Inc. Biophysics and Department of Chemistry University of Michigan

在固体NMR中,1H-13C交叉极化（CP, Cross Polarization）技术被广泛用于增强13C的信号,其极化转移效率极大地依赖于1H-13C异核偶极相互作用。在多相聚合物中往往同时存在着刚性组分和柔性组分,而柔性组分中快速运动的聚合物链段往往会... 详细信息

在固体NMR中,1H-13C交叉极化（CP, Cross Polarization）技术被广泛用于增强13C的信号,其极化转移效率极大地依赖于1H-13C异核偶极相互作用。在多相聚合物中往往同时存在着刚性组分和柔性组分,而柔性组分中快速运动的聚合物链段往往会平均掉1H-13C异核偶极相互作用,使得柔性组分的13C信号只能得到很有限的增强,甚至完全丢失。因此,我们提出将一种将CP与NOE或者RINEPT技术有效结合的方法,可以高效获取多相聚合物的碳谱,同时大大增强柔性相组分的信号。进一步,我们将这种方法拓展到异核相关谱（HETCOR）技术中,提出了两种分别适用于低转速和超高速魔角旋转条件的13C检测和1H检测的HETCOR脉冲序列,进而可以高效获得多相聚合物完整的13C-1H HETCOR谱,同时可以有效地区分刚性相和柔性相的信号。

关键词：交叉极化异核相关谱信号增强柔性相固体核磁

增强多相聚合物中柔性相组分信号的固体NMR新方法

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增强多相聚合物中柔性相组分信号的固体NMR新方法

2021第二十一届全国波谱学学术年会

在固体NMR中,H-C交叉极化(CP, Cross Polarization)技术被广泛用于增强C的信号,其极化转移效率极大地依赖于1H-C异核偶极相互作用。在多相聚合物中往往同时存在着刚性组分和柔性组分,而柔性组分中快速运动的聚合物链段往往会平均掉1H-C... 详细信息

在固体NMR中,H-C交叉极化(CP, Cross Polarization)技术被广泛用于增强C的信号,其极化转移效率极大地依赖于1H-C异核偶极相互作用。在多相聚合物中往往同时存在着刚性组分和柔性组分,而柔性组分中快速运动的聚合物链段往往会平均掉1H-C异核偶极相互作用,使得柔性组分的C信号只能得到很有限的增强,甚至完全丢失。因此,我们提出将一种将CP与NOE或者RINEPT技术有效结合的方法,可以高效获取多相聚合物的碳谱,同时大大增强柔性相组分的信号。进一步,我们将这种方法拓展到异核相关谱(HETCOR)技术中,提出了两种分别适用于低转速和超高速魔角旋转条件的C检测和H检测的HETCOR脉冲序列,进而可以高效获得多相聚合物完整的C-H HETCOR谱,同时可以有效地区分刚性相和柔性相的信号。

关键词：交叉极化异核相关谱信号增强柔性相固体核磁

CNN Approaches for Classification of Indian Leaf Species Using Smartphones

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Computers, Materials & Continua 2020年第3期62卷 1445-1472页

作者： M.Vilasini P.ramamoorthy KPR Institute of Engineering and Technology Coimbatore641407India Adithiya Institute of Engineering and Technology Coimbatore641107India

Leaf species identification leads to multitude of societal *** is enormous research in the lines of plant identification using pattern *** the help of robust algorithms for leaf identification,rural medicine has the potential to reappear as like the previous *** paper discusses CNN based approaches for Indian leaf species identification from white background using *** of CNN models over the features like traditional shape,texture,color and venation apart from the other miniature features of uniformity of edge patterns,leaf tip,margin and other statistical features are explored for efficient leaf classification.

关键词： Deep learning CNN classification transfer learning prewitt edge detection

Analysis of Cognitive Radio for LTE and 5G Waveforms

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Computer Systems Science & Engineering 2022年第12期43卷 1207-1217页

作者： Ramesh ramamoorthy Himanshu Sharma A.Akilandeswari Nidhi Gour Arun Kumar Mehedi Masud Centre for Artificial Intelligence Chennai Institute of TechnologyChennaiIndia Department of Computer Science and Engineering JECRC UniversityJaipur303905India Institute of ECE Saveetha School of EngineeringChennaiIndia Department of Electronics and Communication Engineering JECRC UniversityJaipur303905India Department of Computer Science College of Computers and Information TechnologyTaif University11099Saudi Arabia

Spectrum sensing is one of the major concerns in reaching an efficientQuality of service (QOS) in the advanced mobile communication system. Theadvanced engineering sciences such as 5G, device 2 device communications(D2D), Internet of things (IoT), MIMO require a large spectrum for better *** frequency division multiplexing (OFDM) is not a choice in advancedradio due to the Cyclic Prefix (CP), wastage of the spectrum, and so on. Hence, itis important to explore the spectral efficient advanced waveform techniques andcombine a cognitive radio (CR) with the 5G waveform to sense the idle spectrum,which overcomes the spectrum issue. The demand for spectrum is ever increasing;however, spectrum is limited and is an acutely scarce resource. To alleviate theissue, techniques like Cognitive Radios (CR) have been devised. However, suchtechniques are non-standardized, and many variations of CR algorithms have beentried and tested. This paper details the several spectrum sensing methods tailoredfor CR. We explain the benefits, uniqueness, and drawbacks of the various techniques to provide a comprehensive review of the scene, including all recent andnovel techniques of CR. Finally, we provided experimental results for the performance of the CR for key 5G and beyond modulation techniques to elaborate thedependency of the CR techniques for CR applications and provide a competitivereview of their performance. Experiments show that the CR integrated withNOMA shows better performance as compared with existing techniques.

关键词： CR Energy detection FBMC NOMA OFDM

Novel Apodized Fiber Bragg GratingApplied for Medical Sensors:Performance Investigation

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Computer Modeling in Engineering & Sciences 2023年第4期135卷 301-323页

作者： Ramya Arumugam ramamoorthy Kumar Samiappan Dhanalakshmi Khin Wee Lai Lei Jiao Xiang Wu Department of Electronics and Communication Engineering College of Engineering and TechnologySRM Institute of Science and TechnologyKattankulathurChengalpattu603203India Department of Biomedical Engineering Faculty of EngineeringUniversiti MalayaKuala Lumpur50603Malaysia General Hospital of Xuzhou Mining Group Xuzhou221000China School of Medical Information&Engineering Xuzhou Medical UniversityXuzhou221000China

Sensors play an important role in shaping and monitoring human *** of methods to use Fiber Bragg Grating(FBG)with enhanced sensitivity has attracted great interest in the field of medical *** this paper,a novel apodization function is proposed and performance evaluation and optimization of the same have been made.A comparison was conducted between various existing apodization functions and the proposed one based on optical characteristics and sensor *** results evince the implementation of the proposed apodization function for vital sign *** optical characteristics considered for evaluation are Peak Resonance Reflectivity level,Side Lobes Reflectivity level and FullWidth HalfMaximum(FWHM).The proposed novel apodization novel function has better FWHM,which is narrower than the FWHM of uniform *** characteristics like a quality parameter,detection accuracy and sensitivity also show *** proposed novel apodization function is demonstrated to have a better shift in wavelength in terms of temperature and pulse measurement than the existing *** sensitivity of the proposed apodized function is enhanced with a Poly-dimethylsiloxane coating of varying thickness,which is 6 times and 5.14 times greater than uniform Fiber Bragg grating and FBG with the proposed novel apodization function,respectively,enhancing its utilization in the field of medicine.

关键词： Fiber bragg grating apodization optical sensing temperature strain sensitivity

Impedance and Magnetization Studies of Ultrafine Ni-Zn Ferrite

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Journal of Materials Science & Technology 1997年第4期13卷 289-292页

作者： R.ramamoorthy S.Ramasang and A.Narayanasamy(Dept. of Nuclear Physics, University of Madras, Guindy Campus, Madras-600 025, India) Dept. of Nuclear Physics University of Madras Guindy Campus Madras-600 025 India

Ultrafine Ni0.5Zn0.5 Fe2O4 powder was prepared by PVA aided chemical method. The powder and sintered pellets were characterised by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), thermogravimetric analysis (TGA) and complex impedance (Cl) analysis. The particles are found to be in the size range of 15 to 26 nm for various annealing temperatures. The coercivity, saturation magnetisation, Neel temperature and electrical conductivity are found to vary with sintering time at 800℃ for the pellet samples. The variations in the above intrinsic properties are explained qualitatively

关键词： Zn Impedance and Magnetization Studies of Ultrafine Ni-Zn Ferrite Ni

Design, Thermodynamic Performance Comparison and Cost Analysis of Photovoltaic (PV), Concentrated Solar Power (CSP), Wind Turbine, Natural Gas Combined Cycle (NGCC), and Integrated Solar Combined Cycle (ISCC) Power Plants

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Energy and Power Engineering 2020年第6期12卷 288-313页

作者： Peter Jenkins Gowtham ramamoorthy Department of Mechanical Engineering University of Colorado Denver USA

This paper evaluates and discusses ways to use five energy resources more efficiently for generating electric power. An analysis of five different 10 MW powerplants was made: a photovoltaic system, a concentrated solar power system, wind turbines, a natural gas combined cycle and an integrated solar combined cycle. Also, each power plant’s operating principle, thermodynamic analysis, economic analysis, and simulation evaluation were made using the System Advisor Model (SAM), Engineering Equation Solver (EES), and the Thermoflow Power Plant Simulation program. From the analysis, the power plant capacity factor, grid availability, levelized cost of electricity, and annual energy production are compared and analyzed to determine a suitable power plant for a given location.

关键词： Renewable Energy PV CSP Wind Turbine NGCC ISCC