Synthesis, deposition and characterization of tin selenide thin films by thermal evaporation technique

R. Indirajith,T.P. Srinivasan,K. Ramamurthi,R. Gopalakrishnan 한국물리학회 2010 Current Applied Physics Vol.10 No.6

Tin selenide alloy was synthesized by following simple chemical reaction method, at comparatively lower temperature of 100 ℃, from alkaline medium using SnCl2.2H2O and selenium as source materials. Powder X-ray diffraction analysis reveals that the particle size of the synthesized product is in nanometer scale. Using the reaction product as source material, the SnSe films were deposited on glass substrates at room temperature, 150 ℃, 250 ℃, 350 ℃ and 450 ℃. Structural, elemental, optical, surface morphological and electrical properties of the as deposited films were studied by X-ray diffraction, Energy Dispersive X-ray Analysis, UV-Vis-NIR, Scanning Electron Microscopy and Hall effect measurement techniques and the relevant details have been obtained.

Management of Maruca vitrata (F.) (Lepidoptera: Pyralidae)

R. Srinivasan,S.T. Lee,Y.J. Lo,N.S. Talekar 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

2001년에 1만 MW규모로 원자력개발

Srinivasan M.R. 한국원자력산업회의 1990 원자력산업 Vol.10 No.5

Optimization of friction stir welding process parameters on AA 6063-SiC-B4C hybrid metal matrix composites by genetic algorithm

R. Srinivasan,B. Suresh Babu,P. Prathap,Ruban Whenish,R. Soundararajan,G. Chandramohan 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.1

Friction Stir Welding (FSW) is a metal joining process has its own benefits over fusion welding processes. FSW AluminiumMetal Matrix Composites (AMMC) replaced conventional metals for structural applications in aerospace, automobile andmarine sectors. In this present investigation, process parameters of FSW for joining AA 6063-SiC-B4C hybrid MMCs wereoptimized in order to achieve maximum tensile strength. Initially, AMMC was manufactured through stir casting with thematrix AA 6063 and reinforcements SiC and B4C. The hybrid MMC work pieces were subjected to FSW process by varyingthe process parameters such as tool rotation speed, welding speed and axial force using Taguchi L27 orthogonal array. Tensilestrength of hybrid composite was examined and regression analysis were done using MINITAB V17 software. GeneticAlgorithm technique was used to optimize the tensile strength with FSW parametric combinations. The optimum parametersfor FSW of AA6063-SiC-B4C hybrid composites were Tool rotational speed (TRS) – 1050 rpm; Axial Force (AF) – 10 kN andWeld Speed (WS) – 45 mm/min obtained. The optimal parameters were applied to experimental study and the results werevalidated.

The effect of simulated borer infested shoot pruning on yield parameters of eggplant

R. Srinivasan,Chun-Chu Huang 한국응용곤충학회 2009 Journal of Asia-Pacific Entomology Vol.12 No.1

Pruning and prompt disposal of pest-damaged eggplant shoots at regular intervals up to the first harvest is an important component in the eggplant fruit and shoot borer (EFSB) IPM strategy. However, the impact of pruning on yield parameters remains unknown. We conducted field experiments during 2005–2007 to analyze the impact of pruning on the yield of an EFSB-susceptible accession (EG075) and a commercial cultivar (‘Pingtung long’) through simulated studies. Shoot pruning did not have any significant effect on the mean number of fruits per plant in both varieties. However, significant differences in mean fruit length of ‘Pingtung long’ occurred among the treatments; the longest fruit length (25.22 cm) was recorded with 30% shoot pruning. The mean fruit diameter and fruit weight did not differ significantly in ‘Pingtung long’ or EG075, and there was no significant yield reduction due to shoot pruning in either variety. Pruning and prompt disposal of pest-damaged eggplant shoots at regular intervals up to the first harvest is an important component in the eggplant fruit and shoot borer (EFSB) IPM strategy. However, the impact of pruning on yield parameters remains unknown. We conducted field experiments during 2005–2007 to analyze the impact of pruning on the yield of an EFSB-susceptible accession (EG075) and a commercial cultivar (‘Pingtung long’) through simulated studies. Shoot pruning did not have any significant effect on the mean number of fruits per plant in both varieties. However, significant differences in mean fruit length of ‘Pingtung long’ occurred among the treatments; the longest fruit length (25.22 cm) was recorded with 30% shoot pruning. The mean fruit diameter and fruit weight did not differ significantly in ‘Pingtung long’ or EG075, and there was no significant yield reduction due to shoot pruning in either variety.

Prediction of bend force and bend angle in air bending of lectrogalvanized steel using response surface methodology

R. Srinivasan,D. Vasudevan,P. Padmanabhan 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.7

This paper presents the development of predictive models for bend force and final bend angle (after springback) in air bending of electrogalvanized steel sheet employing response surface methodology. The models are developed based on five-level half factorial central composite design of experiments with strain hardening exponent, coating thickness, die opening, die radius, punch radius, punch travel,punch velocity as input parameters and bend force and final bend angle as responses. The results obtained from the models are in good accord with the experimental results. The effects of individual parameters and their interactions on the responses have also been analyzed in this study.

A Study on Performance of 3D RC Frames with Masonry in-fill under Dynamic Loading Conditions

R. Srinivasan,S. Suresh Babu,Sidramappa V. Itti 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.1

This paper enlightens the response or behavior of 3D RC frames with various configurations & amount of masonry in-fill, under dynamic loading conditions. A 1:3 scale, two bay three storey models of a typical office building were constructed with various locations and percentage of masonry in-fill. Components of structure ie, structural sub-assemblages of columns, beams and slabs were casted from the same materials. A series of various ground motion tests were performed on the building model using servo controlled hydraulic actuator. The dynamic characteristics, such as frequency, acceleration and amplitude were identified at each frequency level. The effect of de-bonding of masonry in-fill with RC frames with increase in base acceleration was also observed in this study. Analytical models were developed to predict the natural characteristics and dynamic properties of structure. In modal analysis, masonry in-fill was modeled as equivalent diagonal strut and thickness of strut was taken as equal to in-fill thickness. Material properties and boundary conditions were assigned suitably for in-fill.

Investigation and optimization on micro and nano Al2O3 reinforced aluminium composites using GRA coupled PCA technique

A. Srinivasan,R. Prabu,S. Ramesh,R. Viswanathan 한양대학교 청정에너지연구소 2022 Journal of Ceramic Processing Research Vol.23 No.6

Aluminum alloy are widely adopted material for engineering applications in automobile, aircraft and marine industries. Itshigh strength to weight ratio attracts modern industry to extend its applications in various domains. For producing variouscomponents, turning is the most reputed machining operation. The method of manufacturing directly impacts the productaccuracy. The present research deals with fabrication and optimization study in dry turning of LM25 Aluminium MetalMatrix Composites (AMMCs). For AMMC fabrication, 10 wt.% of micro and nano Al2O3 ceramic particle is added asreinforcement. Hybrid Grey Relational Analysis (GRA) coupled Principal Component Analysis (PCA) technique is suggestedfor finding optimization results. Experiment was conducted with cutting speed (V), feed rate (f), and depth of cut(d) as inputparameters. Based on optimization, feed rate dominates the entire turning process compared to cutting speed and depth of cutand 12.95% improvement of GRA was achieved at the end of confirmation experiment.

Remote NDT for Inspection of Reactor Vessel Components

B. Anandapadmanaban,G. Srinivasan,R. P. Kapoor 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.5

Fast Breeder Test Reactor (FBTR) is a 40 MW (thermal) / 13.2MW (electrical), Plutonium - Uranium mixed carbide fuelled, sodium cooled, loop type nuclear reactor operating at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam. Its main aim is to generate experience in operation of fast reactors and sodium systems and to serve as an irradiation facility for development of fuels and structural materials for fast reactors. Nuclear reactors pose difficulties to the NDT techniques used to monitor the conditions of the internal components. Sodium cooled fast breeder reactors have their own typical difficulties in using the NDT techniques. These are due to the need for operation in aggressive environment of nuclear radiation and sodium (molten/vapour), as well as the need to maintain leak tightness of a very high order during all states of reactor operation and shutdown for fuel handling, maintenance and remote inspection. This paper discusses the following NDT techniques, which have been successfully used for the past 15 years in FBTR: (i) Periscope and Projector, (ii) Core Co-ordinate Measuring Device and, (iii) Optical fiberscope. The inspection using these techniques have given confidence for further reactor operation at high power by giving useful data on the conditions of the components inside the reactor vessel.

Approximate best proximity pair results on metric spaces using contraction operators

R. Theivaraman,P. S. SRINIVASAN,A. Herminau Jothy 강원경기수학회 2023 한국수학논문집 Vol.31 No.3

The aim of this paper is to prove some new approximate best proximity pair theorems on metric spaces using contraction mappings such as $P$-Bianchini contraction, $P-B$ contraction and so on. A few examples are provided to exemplify our findings. Finally, we discuss some applications that are related to the main results.