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Bilateral scleromalacia perforans and peripheral corneal thinning in Wegener's granulomatosis

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 439-442页

作者： S C reddy I tajunisah t Rohana Department of Ophthalmology Faculty of Medicine University of Malaya

A rare case of bilateral scleromalacia perforans, bilateral peripheral corneal thinning (contact lens cornea) and unilateral orbital inflammatory disease in a 50 year old female patient with an indolent form Wegener's granulomatosis(WG) involving lungs and sinuses is reported. the patient survived for 12 years after the initial diagnosis of systemic disease. there was perforation of left globe following trauma and no perforation of the right globe till the last follow up of the patient.

关键词： Wegener's granulomatosis scleromalacia perforans peripheral thinning of cornea proptosis

Osteo-odonto keratoprosthesis in Stevens-Johnson syndrome:a case report

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International Journal of Ophthalmology(English edition) 2011年第2期4卷 212-215页

作者： reddy SC tajunisah I tan D t Department of Ophthalmology Faculty of MedicineUniversity of Malaya Corneal services department Singapore National Eye Centre & Department of OphthalmologyYong Loo Lin School of MedicineNational University of Singapore

·AIM:to report a successful osteo-odonto keratoprosthesis(OOkP) procedure in a case of end stage of corneal blindness due to Stevens-Johnson syndrome (SJS).·MEtHODS:An interventional case report.·RESULtS:We describe a 35-year-old Indian woman,a known case of SJS with bilateral dry eyes and corneal blindness (failed corneal graft with vascularised total corneal opacity in the right eye and non-healing corneal ulcer in the left eye).Vision was hand movement only in both *** corneal ulcer healed with medical treatment resulting in vascularised total corneal opacity with no improvement in *** was performed in the right eye and the vision was improved from hand movement to 6/*** same vision was maintained in the right eye at the last follow-up 5 years after surgery.·CONCLUSION:OOkP provides good visual rehabilitation with long-term anatomically stable prosthesis in patients with end-stage of ocular surface disorders and corneal blindness secondary to SJS.·

关键词： osteo-odonto keratoprosthesis Stevens-Johnson syndrome corneal blindness

Effect of Welding Processes and Consumables on tensile and Impact Properties of High Strength Quenched and tempered Steel Joints

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Journal of Iron and Steel Research International 2008年第6期15卷 87-94页

作者： G Magudeeswaran V Balasubramanian G Madhusudhan reddy t S Balasubramanian Center for Advanced Materials Joining and Research(CEMAJOR) Department of Manufacturing EngineeringAnnamalai University Metal Joining Section Defence MetallurgicalResearch Laboratory Special Vehicles Division Combat Vehicles Research and Development Establishment

Quenched and tempered steels are prone to hydrogen induced cracking in the heat affected zone after welding. the use of austenitic stainless steel consumables to weld the above steel was the only available remedy because of higher solubility for hydrogen in austenitic phase. In this investigation, an attempt was made to determine a suitable consumable to replace expensive austenitic consumables. two different consumables, namely, austenitie stain less steel and low hydrogen ferritic steel, were used to fabricate the joints by shielded metal are welding （SMAW） and flux cored arc welding （FCAW） processes. the joints fabricated by using low hydrogen ferritic steel consumables showed superior transverse tensile properties, whereas joints fabricated by using austenitic stainless steel consumables exhibited better impact toughness, irrespective of the welding process used. the SMAW joints exhibited superior mechanical and impact properties, irrespective of the consumables used, than their FCAW counterparts.

关键词： shielded metal arc welding process flux cored arc welding process austenitie stainless steel low hydro gen ferritic steel transverse tensile property impact toughness

Electrical transport and current properties of rare-earth dysprosium Schottky electrode on p-type GaN at various annealing temperatures

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Journal of Semiconductors 2017年第11期38卷 39-47页

作者： G.Nagaraju k.Ravindranatha reddy V.Rajagopal reddy Department of Physics Sri Venkateswara University Tirupati-517 502 India Department of Physics SGS Arts College Tirupati-517 502 India

the electrical and current transport properties of rapidly annealed Dy/p-GaN SBD are probed by I-V and C-V techniques. the estimated barrier heights（BH） of as-deposited and 200 ℃ annealed SBDs are 0.80 eV（I-V）/0.93 eV（C-V） and 0.87 eV（I-V）/1.03 eV（C-V）. However, the BH rises to 0.99 eV（I-V）/1.18 eV（C-V）and then slightly deceases to 0.92 eV（I-V）/1.03 eV（C-V） after annealing at 300 ℃ and 400 ℃. the utmost BH is attained after annealing at 300 ℃ and thus the optimum annealing for SBD is 300 ℃. By applying Cheung＇s functions, the series resistance of the SBD is estimated. the BHs estimated by I-V, Cheung＇s and ΨS-V plot are closely matched; hence the techniques used here are consistency and validity. the interface state density of the as-deposited and annealed contacts are calculated and we found that the NSS decreases up to 300 ℃ annealing and then slightly increases after annealing at 400 ℃. Analysis indicates that ohmic and space charge limited conduction mechanisms are found at low and higher voltages in forward-bias irrespective of annealing temperatures. Our experimental results demonstrate that the Poole-Frenkel emission is leading under the reverse bias of Dy/p-GaN SBD at all annealing temperatures.

关键词： p-GaN rare-earth Dy Schottky contacts annealing effects electrical properties energy distribution profiles carrier transport mechanism

Substrate temperature Dependent Properties of Cu Doped NiO Films Deposited by DC Reactive Magnetron Sputtering

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Journal of Materials Science & technology 2013年第7期29卷 647-651页

作者： Yarraguntla Ashok kumar reddy Akepati Sivasankar reddy Pamanji Sreedhara reddy Department of Physics Sri Venkateswara UniversityTirupathi 517502India Division of Advanced Materials Engineering Kongju National UniversityBudaedongCheonan CitySouth Korea

the NiO-Cu composite films were deposited on a glass substrate at various substrate temperatures by DC reactive magnetron sputtering technique. the effect of substrate temperature on the structural, optical, morphological and electrical properties of the films was mainly investigated. X-ray diffraction studies revealed that when the substrate temperature increased to above 200 ℃, the preferred orientation tended to move to another preferred site from （220） to （111） and had a band gap values increased with increasing substrate observed that the grain size and root mean square stable cubic structure. the optical transmittance and temperature. From the morphological studies, it was roughness were increased with increasing substrate temperature. the electrical resistivity of the film decreased to 0.017 Ωcm at high substrate temperature of 400 ℃.

关键词： Sputtering NiO-Cu composite films Substrate temperature Crystallite size Electrical resistivity

Interactive effects of carbon dioxide, low temperature, and ultrav｜olet-B radiation on cotton seedling root and shoot morphology and growth

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Frontiers of Earth Science 2016年第4期10卷 607-620页

作者： David BRAND Chathurika WIJEWARDANA Wei GAO k. Raja reddy Department of Plant and Soil Sciences Mississippi State University Starkwille MS 39762 USA USDA UVB Monitoring and Research Program Natural Resource Ecology Laboratory and Department of Ecosystem Science and Sustainability Colorado State University Fort Collins CO 80523 USA

Interactive effects of multiple environmental stresses are predicted to have a negative effect on cotton growth and development and these effects will be exacerbated in the future climate. the objectives of this study were to test the hypothesis that cotton cultivars differ in their responses to multiple environmental factors of （CO2） [400 and 750 μ*** 1 （＋（CO2）], temperature [28/20 and 20/12℃ （-t）], and UV-B radiation [0 and 10 kJ. m2. d ^-1（＋ UV- B）]. A genetic and molecular standard （tM-1） and three modern cotton cultivars （DP1522B2XE PHY496W3R, and St4747GLB2） were grown in eight sunlit, controlled environment chambers with control treatment 400 μ***^-1 [CO2], 28/21℃ temperature, and 0 kJ UV B. the results showed significant differences among the cultivars for most of the shoot and root parameters. Plants grown under low temperature alone or as a combination with ＋ UV B treatment caused more detrimental effects on root and shoot vigor. Although the elevated CO2 treatments weakened the damaging effects of higher UV-B levels on cotton growth on all cultivars, increased CO2 could not mask the negative effects of low temperature. When comparing all cultivars, genetic standard tM-1 produced the smallest values for the majority of traits under CO2, UV-B, and low temperature either alone or in combination with other treatments. Based on principal component analysis, the four cultivars were classified as tolerant （DP1522B2XF）, intermediate （PHY496W3R and St4747GLB2） and sensitive （tM-1） to multiple environmental *** temperature was identified as the most damaging treatment to cotton early seedling vigor while elevated CO2 caused the least. Existing variability of cotton cultivars in response tomultiple environmental stresses could allow for selection of cultivars with the best coping ability and higher lint yield for future climate change environments.

关键词： Cotton Climate change winRHIZO Princi-pal component analysis. Stress tolerance.

Welding of nickel free high nitrogen stainless steel: Microstructure and mechanical properties

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Defence technology（防务技术） 2017年第2期13卷 59-71页

作者： Raffi Mohammed G.Madhusudhan reddy k.Srinivasa Rao Department of Metallurgical Engineering Andhra University Visakhapatnam India Defence Metallurgical Research Laboratory Hyderabad India

High nitrogen stainless steel(HNS) is a nickel free austenitic stainless steel that is used as a structural component in defence applications for manufacturing battle tanks as a replacement of the existing armour grade steel owing to its low cost, excellent mechanical properties and better corrosion *** fusion welding causes problems like nitrogen desorption, solidification cracking in weld zone, liquation cracking in heat affected zone, nitrogen induced porosity and poor mechanical *** above problems can be overcome by proper selection and procedure of joining process. In the present work, an attempt has been made to correlate the microstructural changes with mechanical properties of fusion and solid state welds of high nitrogen steel. Shielded metal arc welding(SMAW), gas tungsten arc welding(GtAW), electron beam welding(EBW) and friction stir welding(FSW) processes were used in the present work. Optical microscopy, scanning electron microscopy and electron backscatter diffraction were used to characterize microstructural changes. Hardness, tensile and bend tests were performed to evaluate the mechanical properties of welds. the results of the present investigation established that fully austenitic dendritic structure was found in welds of SMAW. Reverted austenite pools in the martensite matrix in weld zone and unmixed zones near the fusion boundary were observed in GtA welds. Discontinuous ferrite network in austenite matrix was observed in electron beam *** recrystallized austenite grain structure was observed in the nugget zone of friction stir *** mechanical properties are obtained in friction stir welds when compared to fusion welds. this is attributed to the refined microstructure consisting of equiaxed and homogenous austenite grains.

关键词： High nitrogen austenitic stainless steel(HNS) Shielded metal arc welding (SMAW) Gas tungsten arc welding (GtAW) Electron beam welding (EBW) Friction stir welding (FSW)

A comparative analysis of unsteady and steady Buongiorno’s Williamson nanoliquid flow over a wedge with slip effects

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1767-1777页

作者： R.Chandra Sekhar reddy P.Sudarsana reddy Department of Mathematics Rajeev Gandhi Memorial Collge of Engineering&TechnologyNandyalA.P.India

Comparison between unsteady and steady MHD Buongiorno’s model Williamson nanoliquid flow through a wedge with slip effects,chemical reaction and radiation is made in this *** and Brownian motion are also considered in this *** similarity variables are presented to transmute the governing PDEs into the set of non-linear *** most widely authenticated finite element method is implemented to analyze these set of ODEs *** behavior of concentration,temperature and velocity sketches for varied values of relevant parameters is numerically calculated and the outcomes are plotted through *** numerical values of dimensionless rates of mass transfer,heat and velocity are also evaluated and depicted through *** is noted that with upsurging values of angle of wedge parameter,the distributions of temperature of the liquid intensify in both steady and unsteady cases.

关键词： Finite element method Chemical reaction Williamson nanoliquid thermophoresis thermal radiation Brownian motion

Characterization and Effect of Using Mahua Oil Biodiesel as Fuel in Compression Ignition Engine

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Journal of thermal Science 2009年第4期18卷 382-384页

作者： N.kapilan t.P.Ashok Babu R.P.reddy Department of Mechanical Engineering NITKSurathkal

there is an increasing interest in India, to search for suitable alternative fuels that are environment friendly. thisled to the choice of Mahua Oil (MO) as one of the main alternative fuels to diesel. In this investigation, MahuaOil Biodiesel (MOB) and its blend with diesel were used as fuel in a single cylinder, direct injection and compressionignition engine. the MOB was prepared from MO by transesterification using methanol and potassiumhydroxide. the fuel properties of MOB are close to the diesel and confirm to the AStM standards. From the enginetest analysis, it was observed that the MOB, B5 and B20 blend results in lower CO, HC and smoke emissionsas compared to diesel. But the B5 and B20 blends results in higher efficiency as compared to MOB. HenceMOB or blends of MOB and diesel (B5 or B20) can be used as a substitute for diesel in diesel engines used intransportation as well as in the agriculture sector.

关键词： Alternative fuel mahua oil biodiesel engine performance