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Dielectric dispersion,linear and nonlinear optical properties of Li_(2)O-WO_(3)-B_(2)O_(3):V_(2)O_(5)glasses

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Journal of Advanced Dielectrics 2020年第3期10卷 64-71页

作者： Linganaboina Srinivasa Rao Chinthakuntla Thirmal Parchuri raghavendra Rao Centre for Nanoscience and Technology Department of Physics(Humanities&Sciences)VNR Vignana Jyothi Institute of Engineering and Technology Bachupally Nizampet(S.O)Hyderabad-500090TelanganaIndia Department of Physics Malla reddy Engineering College for Women Maisamma Guda Dhulapally(PO)Secundrabad-500100TelanganaIndia

40 Li_(2)O–5WO_(3)–(55-x)B_(2)O_(3):xV_(2)O_(5)(mol%)for 0.0≤x≤0.8 glasses were prepared by *** polarization was described in terms of the dielectric constant("0)and loss(tanδ).Mixed conduction phenomenon was explained by redox pairs V^(4+)↔V^(5+)and W^(5+)↔W^(6+) at high *** polarizability(αe)was determined over a range of frequencies(100 Hz–100 kHz)and temperatures(30–280℃).The change of boron coordination in the glass network was explained with the aid of temperature coefficient of polarizability(φ).Nonlinear susceptibility(χ^((3)))and optical band gap(E°)were studied as a function of concentration of V_(2)O_(5).The highest values ofαe andχ^((3))were obtained at x=0.6 mol%.These glasses may find potential practical applications in the fields of solid-state ionics and nonlinear optics.

关键词： Dielectric properties electronic polarizability third-order nonlinear optical susceptibility optical band gap

Prediction of Facial Profile Based on Morphometric Measurements and Profile Characteristics of Permanent Maxillary Central Incisor Teeth

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Journal of Forensic Science and Medicine 2015年第1期1卷 26-32页

作者： raghavendra N Venkatesh V Kamath Krishnanand P Satelur Komali Rajkumar Department of Oral and Maxillofacial Pathology Dr.Syamala Reddy Dental CollegeHospital and Research CentreBangaloreKarnatakaIndia

The computation of facial profile from dental morphometrics has been a subject of great interest in forensic *** use of teeth to draw a profile and facial features is valuable in times of mass disasters when body remains are unavailable due to extreme *** study aims to identify and evaluate applicable parameters in the permanent maxillary central incisors and the face of an individual.A correlation of these parameters establishes a mathematical equation that further charts a tooth‑facial profile *** soft and hard tissue landmarks on the face in the frontal and the lateral profiles(using standardized photographs)and seven landmarks on the facial/labial surface of the clinical crown of the permanent maxillary central incisor(using casts of the maxilla)were identified for the *** on these,a set of eight horizontal and seven vertical parameters on the face and four parameters on the tooth were created for the *** and external correlations between the two were carried out and statistically analyzed.A logistic regression was made to predict the probability of the parameters most likely to be reproduced in the creation of the facial profile,based on tooth *** results indicated a definite correlation between the facial and the tooth *** the multiple parameters,a definite correlation in the horizontal dimension could be established between the mouth width and the mesiodistal width(MDW)of the *** the vertical dimension,a definite relationship existed between the crown height of the tooth and the width of the midface(zygoma‑mandible).There exist divergences in the correlation of tooth and facial parameters.

关键词： Dental morphometrics forensic odontology permanent maxillary central incisor

Kiran Nandivada’s Stuck Blade in a Grinder Jar Degenerative Cascade by LSTV at L5-S1

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Open Journal of Orthopedics 2024年第1期14卷 12-21页

作者： Venkata Satya Kumar Kiran Nandivada Nadavinamani Shivanand raghavendra Nandivada Nikhil Bharadwaja Moola Sohith Mahadeva reddy Ahmed Usama Rizvi Nandivada Ortho Spine Surgeon & Rheumatologist Abu Dhabi United Arab Emirates Senior Orthopedic Surgeon & Rheumatologist Abu Dhabi United Arab Emirates General Practitioner Visakhapatnam India Department of Medicine Kamineni Institute of Medical Sciences Telangana India Department of Medicine Tbilisi State Medical University Tbilisi Georgia

Background: Mario Bertolotti, (1917) described LSTV-Lumbar spinal transitional vertebra as Bertolotti Syndrome a century ago and associated low back pain with it. Yet, it needs to be given significance in general orthopaedic practice even now, and radiologists underreport it. LSTV is a congenital anatomical anomaly that Castellvi classified into four varying types. Purpose: I titled this phenomenon “Kiran Nandivada’s stuck blade in a grinder jar degenerative cascade by LSTV at L5-S1” to clearly explain how an abnormal mega-transverse apophysis with its various variations affects the weight-bearing mechanics as the L5-S1 which is a vital junction where the maximum body weight is directed into both the sacroiliac joints and if a transitional vertebra occurs it becomes detrimental and abnormally redirects the load-bearing forces and leads to a progressive degenerative cascade both proximally and distally. As the L5 vertebral rotations and other movements of flexion, extensions, lateral flexion are stuck like a bent grinder blade, the other areas of the region are damaged progressively as the pelvis, just like the grinder motor tries to move it, resulting in overheating and maybe even a burnout results in the form of facet arthritis, disc degeneration in the normal disc above, the transitional disc at L5-S1, foraminal osteophytes causing radiculopathy, sacroiliac joint arthritis. Material and Methods: Around 200 X-rays of children and adults with this congenital anomaly have been studied between 2020 and 2023. This is a retrospective study. Results: 1) Our study showed an Increased incidence of LSTV at 15%. 2) Patients ranged from asymptomatic, atypical lumbago to classical lumbago with sciatica and claudication. Findings supported facet and sacroiliac joint arthritis and the pain, relieved with physiotherapy, posture corrections, weight reduction, and lifestyle precautions, negating the need for local steroid injections, radiofrequency ablation or surgical excision as

关键词： LSTV Bertolotti Syndrome Transitional Vertebra Facet Tropism Congenital Dysplasia

Development of image motion compensation system for 1.3 m telescope at Vainu Bappu Observatory

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Research in Astronomy and Astrophysics 2020年第1期20卷 93-106页

作者： Sreekanth reddy Vallapureddy Ravinder Kumar Banyal Sridharan Rengaswamy P Umesh Kamath Aishwarya Selvaraj Indian Institute of Astrophysics

We developed a tip-tilt system to compensate the turbulence induced image motion for the 1.3 m telescope at Vainu Bappu Observatory,at *** instrument is designed to operate at the visible wavelength band(480-700 nm)with a field of view of 1′×1′.The tilt corrected images have demonstrated up to ≈57% improvement in image resolution and a corresponding peak intensity increase by a factor of ≈2.8.A closed-loop correction bandwidth of ≈26 Hz has been achieved with on-sky tests and the root mean square motion of the star image has been reduced by a factor of ~*** results are consistent with theoretical and numerical predictions of wave-front aberrations caused by atmospheric turbulence and image quality improvement expected from a real-time control *** this paper,we present details of the instrument design,laboratory calibration studies and quantify its performance on the telescope.

关键词： adaptive optics atmospheric effects high angular resolution

维普期刊数据库

Comparative Numerical Analysis of Heat and Mass Transfer Characteristics in Sisko Al_(2)O_(3)-Eg and TiO_(2)-Eg Fluids on a Stretched Surface

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Frontiers in Heat and Mass Transfer 2024年第1期22卷 79-105页

作者： K.Jyothi Abhishek Dasore R.Ganapati Sk.Mohammad Shareef Ali J.Chamkha V.raghavendra Prasad Department of Humanities and Science Ravindra College of Engineering forWomenKurnoolAndhra Pradesh518002India Department of Mechanical Engineering Koneru Lakshmaiah Education FoundationVaddeswaramGunturAndhra Pradesh522302India Department of Biological and Agricultural Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia Department of Mechanical Engineering ANURAG Engineering College(Autonomous)in KodadTelangana508206India Department of Mechanical Engineering CVR College of EngineeringIbrahimpatnamTelangana501510India Faculty of Engineering Kuwait College of Science&TechnologyDoha District35004Kuwait Department of Mathematics G Pulla Reddy College of Engineering College(Autonomous)Kurnool518002India

In the current research,a thorough examination unfolds concerning the attributes of magnetohydrodynamic(MHD)boundary layer flow and heat transfer inherent to nanoliquids derived from Sisko Al_(2)O_(3)-Eg and TiO_(2)-Eg *** nanoliquids are subjected to an extending *** is duly given to slip boundary conditions,as well as the effects stemming from variable viscosity and variable thermal *** analytical approach applied involves the application of suitable similarity *** conversions serve to transform the initial set of complex nonlinear partial differential equations into a more manageable assembly of ordinary differential *** the utilization of the FEM,these reformulated equations are solved,considering the specified boundary *** outcomes attained are graphically depicted by means of plots and *** visual aids facilitate a comprehensive exploration of how diverse parameters exert influence over the distributions of velocity,temperature,and ***,detailed scrutiny is directed towards the fluctuations characterizing pivotal parameters,viz.,Nusselt number,skin-friction coefficient,and Sherwood *** is identified that the Nusselt number showcases a diminishing trend coinciding with increasing values of the volume fraction parameter(φ).This trend remains consistent regardless of whether the nanoliquid under consideration is Al_(2)O_(3)-Eg or TiO_(2)-Eg *** contrast,both the skin-friction coefficient and Sherwood number assume lower values as the volume fraction parameter(φ)*** pattern remains congruent across both classifications of *** findings of the study impart valuable insights into the complex interplay governing the characteristics of HMT pertaining to Sisko Al_(2)O_(3)-Eg and TiO_(2)-Eg nanoliquids along an extending surface.

关键词： MHD boundary layer flow heat transfer Sisko Al_(2)O_(3)-Eg and TiO_(2)-Eg nanoliquids slip boundary conditions variable thermal conductivity nusselt number

不同光照强度下高粱叶片的光合单位和碳素同化作用

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园艺与种苗 1985年第4期 12-14页

作者： V. C. reddy A. S. raghavendra 何雪晖

在饱和光强度下,高等植物遗传固有的或耐阴种的低光合能力,伴随着光合系统Ⅰ(PSⅠ)和光合系统Ⅱ(PSⅡ)的反应而变化。这些变化部分是由于与叶绿素(Chl)有关的某些电子载体的低含量所致。此外,光合单位的大小随栽培期间采用的光照强度而异。

关键词：叶绿素分子光合单位光照强度光照度光合作用特性高粱蜀秫碳素叶片

Effect of TiO₂ Filler Loading on Physico-Mechanical Properties and Abrasion of Jute Fabric Reinforced Epoxy Composites

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Materials Sciences and Applications 2016年第9期7卷 510-526页

作者： Bheemappa Suresha Suryakanth L. Guggare Naraganahalli V. raghavendra Department of Mechanical Engineering The National Institute of Engineering Mysore India Department of Mechanical Engineering Nalla Malla Reddy Engineering College Hyderabad India

Mechanical properties and abrasive wear behaviour of bi-directional jute fabric reinforced epoxy (J/Ep) with micron sized TiO2 particles at different wt% (2.5, 5, 7.5 and 10) were investigated. The tribo-potential of combined effect of TiO2 and jute fiber in epoxy (J/Ep) for enhancing the abrasion resistance has not been studied so far. Hence, the present work aims to explore the possibility of using TiO2 filler and jute fiber to reinforce the epoxy and thus open a new way to implement inexpensive reinforcements and produce new candidate tribo-material for industrial applications. Silane treated TiO2 filled J/Ep composites were prepared by hand lay-up method. Selected mechanical properties and three-body abrasive wear tests were evaluated as per ASTM standards. Results indicate an enhancement in the J/Ep composite mechanical properties due to addition of TiO2 particles up to 7.5 wt% of loading. Highest tensile and flexural properties were found at 7.5 wt% TiO2 loading. Results of abrasion tests show resistance to abrasion at 5 wt% TiO2 filled J/Ep composite. Scanning electron micrographs evidenced that the fiber and filler have fairly good bonding with matrix. Finally, this investigation confirms the applicability of TiO2 as secondary reinforcement in J/Ep composite.

关键词： TiO2 Filled J/Ep Mechanical Properties Abrasion Scanning Electron Microscopy

Pulmonary delivery of liposomal dry powder inhaler formulation for effective treatment of idiopathic pulmonary fibrosis

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Asian Journal of Pharmaceutical Sciences 2018年第1期13卷 91-100页

作者： S.Chennakesavulu A.Mishra A.Sudheer C.Sowmya C.Suryaprakash reddy E.Bhargav Pharmacy Department NDDS Laboratory Donors Plaza Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Pharmacology Department Faculty of Technology and Engineering The Maharaja Sayajirao University of Baroda Center for Pharmaceutical Research Pharmaceutics Department Raghavendra Institute of Pharmaceutical Education and Research

Dry powder inhaler Liposomes were prepared to investigate the effectiveness of pulmonary delivery of Colchicine and Budesonide for Idiopathic Pulmonary fibrosis. Budesonide(BUD) and Colchicine(COL) liposomes were prepared by thin layer film hydration method(TFH) using 1,2-Dipalmitoyl-sn-glycero-3-phosphoglycerol sodium(DPPG), Hydrogenated Soyaphosphotidylcholine(HSPC), Soyaphosphatidylcholine(SPC), cholesterol(CHOL) and drug in different weight ratios. The optimum lipid composition for BUD(74.22 ± 0.97%) was DPPG:HSPC: CHOL(4:5:1) and for COL(50.94 ± 2.04%) was DPPG: SPC: CHOL(3:6:1). These compositions retained drug for a longer period of time so selected for further study. Liposomes were found to be spherical in shape with mean size below 100 nm. Liposomes lyophilized using Mannitol as carrier and cryoprotectant showed high entrapment efficiency(97.89-98.6%). The powder was dispersed through an Andersen cascade impactor to evaluate the performance of the aerosolized powder. It was found that prepared liposomal dry powder inhaler(DPIs) sustained the drug release up to 24 hours. Optimized Budesonide DPI Formulation B2(86.53 ± 1.9%), Colchicine DPI Formulation C2(90.54 ± 2.3 %) and BUD and COL DPI Combination M2(89.91 ± 1.8%, 91.23 ± 1.9%). Histopathological results, measurements of lung hydroxyproline content, Myeloperoxidase activity indicated that liposomal drypowder inhaler administration attenuates lung fibrosis induced by bleomycin. Long term stability studies indicated that lyophilised BUD and COL liposomes were stable for 6 months at(25 °C± 2 °C, 60% ± 5% RH) and refrigerated conditions(2-8 °C). These results supported that combination of budesonide and colchicine liposomal dry powder inhaler pulmonary drug delivery for treatment of idiopathic Pulmonary Fibrosis exhibits prolonged drug retention at targeted site and reduces the systemic exposure.

关键词： Idiopathic Pulmonary fibrosis Budesonide Colchicine Liposomal dry powder inhaler Pulmonary drug delivery

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Kiran Nandivada’s Stuck Blade in a Grinder Jar Degenerative Cascade by LSTV at L5-S1

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