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Institution

National Aerospace Laboratories

FacilityBengaluru, India
About: National Aerospace Laboratories is a facility organization based out in Bengaluru, India. It is known for research contribution in the topics: Coating & Corrosion. The organization has 1838 authors who have published 2349 publications receiving 36888 citations.


Papers
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10 Apr 2015
TL;DR: This work provides solutions on how to tackle with arbitrary spatial and temporal global climate data which is in NetCDF form, and provides a prototype for series of canonical MapReduce operations for number of observational and climate simulation datasets.
Abstract: Introduction of Hadoop has become the de factor for large-scale data analysis in commercial applications, and nowadays finding its prominence in scientific applications also. In climate research, where there is a need for high-performance analytics, the Hadoop MapReduce may be useful in providing solution to data intensive problems. It makes use of parallel computation for analysis paradigm that uses clusters of computers and combines distributed storage of large data sets. This paper presents the potential of MapReduce for scientific data sets which is in the NetCDF format, and performs basic operations common to a wide range of analyses. This provides a prototype for series of canonical MapReduce operations for number of observational and climate simulation datasets. Our work provides solutions on how to tackle with arbitrary spatial and temporal global climate data which is in NetCDF form. This approach can improve efficiencies within data intensive analytic workflows.

9 citations

Journal ArticleDOI
TL;DR: In this article, a Ti-15V-3Cr-3Al-3Sn was nitrided at different temperatures with low pressure plasma with 100% nitrogen, and nitrogen diluted with hydrogen and argon.
Abstract: Titanium alloy, Ti-15V-3Cr-3Al-3Sn was nitrided at different temperatures with low pressure plasma with 100% nitrogen, and nitrogen diluted with hydrogen and argon. The nitrided layers were characterized for hardness, structure, and composition. Nitrided samples show weight gain that depended on temperature and duration of nitriding. EDS results show that intake of nitrogen is significant at temperatures above 750 °C. Hydrogen dilution increases intake of nitrogen. Samples nitrided with hydrogen dilution have lower surface roughness and higher nitrogen concentration. Depth profiling by XPS shows the formation of nitride in the near-surface region and also that nitrogen concentration in the interior of the nitrided layers is higher at higher temperatures. Micro Raman shows that formation of nitride takes place at higher temperatures. XRD shows that the nitrided layers consist predominantly of alpha Ti and Ti2N. This is reflected in the hardness increase and hardness profile in the nitrided samples. The low intake of nitrogen by the alloy is attributed to the low solubility of nitrogen in beta alloy and low diffusion coefficient of nitrogen. Reciprocating wear studies showed a lower coefficient of friction and lower wear loss for nitrided samples compared to that of substrate.

9 citations

Journal ArticleDOI
TL;DR: In this paper, powder X-ray diffraction (PXRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM) techniques were used to study the structural and morphological features of nanocrystalline Nd 2 O 3 :Gd 3+ (2 mol%) phosphor.

9 citations

Journal ArticleDOI
TL;DR: In this paper, polypyrrole (PPy)/Fe3O4 nanocomposites were in situ synthesized using chemical oxidative polymerization in the presence of different loadings.
Abstract: Polypyrrole (PPy)/Fe3O4 nanocomposites were in situ synthesized using chemical oxidative polymerization in an aqueous solution of FeCl36H2O, in presence of different Fe3O4 loadings (0%–1652%) These composites were characterized through a 4 Probe electrical conductivity measurement technique, Fourier Transform infrared spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, X-ray diffraction, thermo gravimetric analysis, and vibrating sample magnetometer Results showed maximum electrical conductivity of 7528 S/cm for the 252% Fe3O4 loaded nanocomposite and with improved thermal stability compared with the host PPy Furthermore, a linear relationship between saturated magnetization Ms and % composition of Fe3O4 in the above nanocomposites was observed, showing 634 emu/g at 1652% Fe3O4/ PPy nanocomposite POLYM COMPOS, 00:000–000, 2011 a 2011 Society of Plastics Engineers

9 citations

Journal ArticleDOI
TL;DR: In this paper, a single-layer 3D profile with fillet for use as insert in composite T joints and stiffeners is presented, where the insert acts as a bridging member among the three sections of the T joint.
Abstract: This paper details about weaving of single-layer 3D ‘T’ profile with fillet for use as insert in composite ‘T’ joints and ‘T’ stiffeners. The ‘T’ insert with fillet was woven using 3 K carbon tows on a narrow width multi-beam automatic loom. Weaving was carried out based on the double-cloth weaving principle. Novelty of the work lied in the approach adopted for designing of the weave architecture in developing 3D ‘T’ profile with fillet portion, arriving at the pick cycle diagram for weave design development which has been detailed in this paper. Test results of composite ‘T’ joints fabricated incorporating the insert showed strength improvement as well as change in crack propagation mode as compared to conventional ‘T’ joint. The continuous insert with fillet acted as a bridging member among the three sections of the ‘T’ joint, thus contributing to performance improvement.

9 citations


Authors

Showing all 1850 results

NameH-indexPapersCitations
Harish C. Barshilia462366825
K.S. Rajam42834765
Kozo Fujii394115845
Parthasarathi Bera391365329
R.P.S. Chakradhar361664423
T. N. Guru Row363095186
Takashi Ishikawa361545019
Henk A. P. Blom341685992
S. Ranganathan332115660
S.T. Aruna331014954
Arun M. Umarji332073582
Vinod K. Gaur33924003
Keisuke Asai313503914
K. J. Vinoy302403423
Gangan Prathap302413466
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202310
202216
2021143
2020100
201996
2018119