Experimental study on strengthening of R.C beam using glass fibre reinforced composite

Mini, K.M.,Alapatt, Rini John,David, Anjana Elizabeth,Radhakrishnan, Aswathy,Cyriac, Minu Maria,Ramakrishnan, R. Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.50 No.3

This paper reports the influence of number of layers and length of GFRP sheets wrapped onto RCC beams for strengthening. Twelve beams of size $700mm{\times}150mm{\times}150mm$ were cast and tested. Two beams without GFRP and ten beams wrapped in different lay-up patterns with one and two layers of GFRP sheets was subjected to three point loading test and ultrasonic pulse velocity test. Initial crack load, ultimate failure load and types of failure have been observed and noted. Experimental results indicate a significant increase in initial and ultimate load carrying capacity of GFRP wrapped beams compared to unwrapped beams. The failed control specimen was retrofitted using U wrap scheme and tested under three point loading.

Experimental study on strengthening of R.C beam using glass fibre reinforced composite

K.M. Mini,Rini John Alapatt,Anjana Elizabeth David,Aswathy Radhakrishnan,Minu Maria Cyriac,R. Ramakrishnan 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.50 No.3

This paper reports the influence of number of layers and length of GFRP sheets wrapped onto RCC beams for strengthening. Twelve beams of size 700mm × 150mm × 150mm were cast and tested. Two beams without GFRP and ten beams wrapped in different lay-up patterns with one and two layers of GFRP sheets was subjected to three point loading test and ultrasonic pulse velocity test. Initial crack load, ultimate failure load and types of failure have been observed and noted. Experimental results indicate a significantincrease in initial and ultimate load carrying capacity of GFRP wrapped beams compared to unwrapped beams. The failed control specimen was retrofitted using U wrap scheme and tested under three point loading.

"Theoretical investigations on the effect of system parameters in series hydraulic hybrid system with hydrostatic regenerative braking"

R. Ramakrishnan,Somashekhar S. Hiremath,M. Singaperumal 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.5

"As gasoline prices rise and the green movement grows, more fluid power companies are working to develop hydraulic hybrid drive trains for large trucks to passenger cars and wind turbines. The hydraulic hybrid drive system is more effective and efficient than traditional hybrid systems because the quantum of recuperation energy generated is comparatively very high. Series hydraulic hybrid system specially designed for stop-and-go vehicles captures energy as the vehicle brakes and puts the vehicle in motion, when the vehicle is restarted. Then the engine kicks in, once the energy captured gets depleted. The kinetic energy lost as heat energy during mechanical friction braking is recovered and stored in the hydraulic accumulator as potential energy during hydrostatic regenerative braking. This paper gives an insight in to the dynamic simulation results obtained using LMS AMESim tool and effect of various system parameters like pre-charge pressure and hydraulic pump/motor maximum displacement on system output power. Varying the pre-charge pressure of the accumulator and controlling the hydraulic pump/motor maximum displacement show significant improvement in the system output power. Maximizing the system output power indirectly leads to less fuel consumption and pollution reduction in hybrid vehicles."

Role of Antihypertensive Peptides from Plant (sesame, almond and pumpkin) Seed Storage Protein

( Chelliah R. ),( S. R. Ramakrishnan ),( D. H. Oh ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2017 강원 농업생명환경연구 Vol.29 No.3

Proteins are a potential source of health-promoting biomolecules with medical, nutraceutical, and/or food applications. In particular, plant proteins, including globular proteins, represent important functional ingredients in many processed food products. Thus, the current study investigated and compared the antihypertensive properties of globulin, amandin, and cucurbitin proteins isolated from white sesame, almond, and pumpkin seeds, respectively. Extracted globulin, amandin, and cucurbitin proteins were shown to each comprise acidic and basic polypeptides of varying sizes (globulin polypeptides, 30-33 and 20-24 kDa, respectively; amandin polypeptides, 40-42 and 15-20 kDa, respectively; cucurbitin polypeptides, 35-42 and 20-25 kDa, respectively). The alpha amylase-inhibiting activity and resulting antihypertensive effects exhibited by the isolated 11S globulin, amandin, and cucurbitin polypeptides were characterized. Finally, the current study also reviewed current literature with regard to the properties of various peptides released by plant proteases, and their mitigating effects on disorders such as hypertension, diabetes, obesity, and cancer.

Antihypertensive Effect of Peptides from Sesame, Almond, and Pumpkin Seeds: In-silico and In-vivo Evaluation

( Chelliah R. ),( S. R. Ramakrishnan ),( U. Antony ),( S. H. Kim ),( I. Khan ),( C. N. Tango ),( P. N. Kounkeu ),( S. Wei ),( M. S. Hussain ),( E. B. M. Daliri ),( R. Momna ),( M. Y. Kwon ),( E. H. Le 강원대학교 농업생명과학연구원(구 농업과학연구소) 2018 강원 농업생명환경연구 Vol.30 No.1

Plant proteins are important functional ingredients in many processed food products. In particular, globular proteins from various sources play an important role in many food products. In the current study, 11S globulin protein from white sesame seeds, amandin protein from almond seeds, and cucurbitin protein from pumpkin seeds were extracted by means of ammonium sulfate precipitation and purified by anion-exchange chromatography on a DEAE-Sephadex column (20 × 30 cm). Amandin protein of almond and cucurbitin protein of pumpkin seeds both belong to the 11S globulin family. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of protein samples treated with reducing agents revealed that the isolated 11S globulin from white sesame seeds was composed of an acidic (30-33 kDa) and basic (20-24 kDa) polypeptide, amandin from almond seeds was composed of an acidic (40-42 kDa) and basic (15-20 kDa) polypeptide, and cucurbitin from pumpkin seeds was composed of an acidic (35-42 kDa) and basic (20-25 kDa) polypeptide. The alpha amylase-inhibiting activities of the three proteins was determined. Cucurbitin of pumpkin seeds had a greater alpha amylase inhibitory effect (-86%) than 11S globulin of sesame (82.6%) and amandin protein of almond seeds (76%). The antihypertensive effect of the three proteins was evaluated by a chrioallantoin membrane assay in chick embryos, which revealed that cucurbitin protein showed higher vasodilatation activity than the other two proteins.

CAMP: Community Access MODIS Pipeline

Hendrix, V.,Ramakrishnan, L.,Ryu, Y.,van Ingen, C.,Jackson, K.R.,Agarwal, D. North-Holland ; Elsevier Science Ltd 2014 Future generations computer systems Vol.36 No.-

The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument's land and atmosphere data are important to many scientific analyses that study processes at both local and global scales. The Terra and Aqua MODIS satellites acquire data of the entire Earth's surface every one or two days in 36 spectral bands. MODIS data provide information to complement many of the ground-based observations but are extremely critical when studying global phenomena such as gross photosynthesis and evapotranspiration. However, data procurement and processing can be challenging and cumbersome due to difficulties in volume, size of data and scale of analyses. For example, the very first step in MODIS data processing is to ensure that all products are in the same resolution and coordinate system. The reprojection step involves a complex inverse gridding algorithm and involves downloading tens of thousands of files for a single year that is often infeasible to perform on a scientist's desktop. Thus, use of large-scale resource environments such as high performance computing (HPC) environments are becoming crucial for processing of MODIS data. However, HPC environments have traditionally been used for tightly coupled applications and present several challenges for managing data-intensive pipelines. We have developed a data-processing pipeline that downloads the MODIS swath products and reprojects the data to a sinusoidal system on an HPC system. The 10 year archive of the reprojected data generated using the pipeline is made available through a web portal. In this paper, we detail a system architecture (CAMP) to manage the lifecycle of MODIS data that includes procurement, storage, processing and dissemination. Our system architecture was developed in the context of the MODIS reprojection pipeline but is extensible to other analyses of MODIS data. Additionally, our work provides a framework and valuable experiences for future developments and deployments of data-intensive pipelines from other scientific domains on HPC systems.

A Serine12Stop mutation in PB1-F2 of the 2009 pandemic (H1N1) influenza A: a possible reason for its enhanced transmission and pathogenicity to humans

Muthannan A. Ramakrishnan,Marie R. Gramer,Sagar M. Goyal,Srinand Sreevatsan 대한수의학회 2009 Journal of Veterinary Science Vol.10 No.4

As the scientific community scrambles to define the ancestry and lineages of the eight segments of new pandemic H1N1 strain, we looked for unique genetic events in this virus’s genome to explain the newly found enhanced virulence and transmissibility among humans. Genome annotations of this virus identified a stop mutation replacing serine at codon 12 (S12Stop) of the PB1-F2 protein, a virulence factor in influenza A viruses. Here, we discuss the significance of this finding and how it may contribute to host specialization, explaining the virtual absence of the H1N1 influenza A virus strain in pig populations. This finding is expected to lead to a better understanding of the transmission and pathogenesis of the 2009 pandemic strain.

3D printed polycarbonate reinforced acrylonitrile–butadiene–styrene composites: Composition effects on mechanical properties, micro-structure and void formation study

Mnvrl Kumar,R. Ramakrishnan,Alnura Omarbekova 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.11

3D printing is one of the most popular additive manufacturing technique due to its usage in vast applications. The process of 3D printed polycarbonate (PC) reinforced acrylonitrile-butadiene-styrene (ABS) composite increases the mechanical properties and yields higher strength for 3D printed structures/products. In this paper, a comparative study was conducted on PC/ABS polymer composites developed using fused deposition modeling (FDM) and conventional compression molding (CM). The proposed study aims at analyzing 3D printed PC/ABS in terms of their processibility, microstructure, and mechanical performance. Three different specimens were prepared with weight percentages (10 wt%, 20 wt%, and 30 wt%) of PC reinforcement in ABS. Mechanical properties of the specimens are used to find the best composition of the composite using FDM and CM. Similarly, the microstructure of specimens is studied to identify the variations in the strength of the polymer composites. This study proves the compatibility of the two polymers. With an increase in the PC content in the sample, the hardness and strength are improved and can provide an excellent amount of strength to the product at a required concentration of PC reinforcement. This phenomenon was explained based on changes in the void formation using microstructural study. Knowing the appropriate polymer composition, it contributes to printing complex 3D printed with better rational, aesthetic and economic benefits for different applications such as automotive, marine, and several other fields.

Temple and Maternity Ward Security using FPRS

Ambeth Kumar, V.D.,Ramakrishnan, M.,Jagadeesh Kannan, R. The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.3

A wide range of applications for Foot Print Recognition System is discussed in this paper. The whole concept works under the principle that foot print is a parameter associated with biometrics that is very common as well as distinct. Its foremost application is at the government hospitals in the under developed and third world nations where there aren't the best of facilities. This system can be applied in the maternity ward of the hospitals for the identification or differentiation of the infants. Till date there has been no specialized system adopted for this purpose. The Foot Print Recognition System will overcome all the defects of any biometrics when applied here. Since the child will be very delicate for an iris scan and it will not be able to open its eyes wide or to correctly place its finger print on the sensor since the hands of a new born infant will be closed for a while. The Foot Print Recognition system can also be implemented in temples where there are cases of theft often reported. This can be used to grant access to the karpagraham of the deity by authorized users alone. These 2 applications of FPRS are discussed in this paper.

Effect of growth temperature on gallium nitride nanostructures using HVPE technique

Munawar Basha, S.,Ryu, S.R.,Kang, T.W.,Srivastava, O.N.,Ramakrishnan, V.,Kumar, J. North-Holland 2012 Physica E, Low-dimensional systems & nanostructure Vol.44 No.9

The growth of hexagonal wurzite one dimensional (1D) gallium nitride (GaN) nanostructures on sapphire substrates using hydride vapor phase epitaxy (HVPE) process was carried out at two different temperatures (973K and 1023K). The GaN nanoneedles were formed at 973K and hexagonal nanorods get formed at 1023K. The morphologies of these nanostructures were studied using high resolution scanning electron microscope. X-ray diffraction and micro-Raman spectroscopy measurements confirmed that the as grown GaN nanostructures are of hexagonal wurtzite structure without any oxide phase. The emission properties of these nanostructures have been investigated using photoluminescence.