Zobrazeno 1 - 10
of 1 261
pro vyhledávání: '"D. Narayana"'
Publikováno v:
Results in Optics, Vol 13, Iss , Pp 100560- (2023)
Cadmium sulfide (CdS) quantum dots (QDs) doped with different concentrations of manganese (Mn = 0, 1, 3, 5, and 7 %) are synthesized via thermolysis of diselenocarbamato complexes of cadmium in the trioctylphosphine oxide (TOPO). The QDs show quantum
Externí odkaz:
https://doaj.org/article/58b228b5792447fcace6db6a519b63df
Publikováno v:
Photonics, Vol 10, Iss 12, p 1345 (2023)
Here, we present a simple and green method of preparing Au-Ag bimetallic nanoparticles (NPs) with a tunable surface plasmon resonance (SPR) wavelength by using picosecond laser irradiation. Au-Ag alloy NPs have been produced by irradiating the soluti
Externí odkaz:
https://doaj.org/article/ec7cbb4c70974b048c4c3d5a8cb7f562
Autor:
D. Rangaprakash, Toluwanimi Odemuyiwa, D. Narayana Dutt, Gopikrishna Deshpande, Alzheimer’s Disease Neuroimaging Initiative
Publikováno v:
Brain Informatics, Vol 7, Iss 1, Pp 1-13 (2020)
Abstract Various machine-learning classification techniques have been employed previously to classify brain states in healthy and disease populations using functional magnetic resonance imaging (fMRI). These methods generally use supervised classifie
Externí odkaz:
https://doaj.org/article/85c90e057c9e41738da21c942dddfc65
Publikováno v:
ACS Omega, Vol 5, Iss 26, Pp 16238-16245 (2020)
Externí odkaz:
https://doaj.org/article/85e7efaae93242e08c76a2adf95a8bbd
Publikováno v:
Annales Geophysicae, Vol 36, Pp 149-165 (2018)
We have investigated the long-term trends in and variabilities of stratospheric ozone, water vapor and temperature over the Indian monsoon region using the long-term data constructed from multi-satellite (Upper Atmosphere Research Satellite (UARS
Externí odkaz:
https://doaj.org/article/cdceb62dc31447edba2ab6ea6ec4974e
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
Abstract The more than a century old Sagnac interferometer is put to first of its kind use to generate an achromatic single-charge vortex equivalent to a Laguerre-Gaussian beam possessing orbital angular momentum (OAM). The interference of counter-pr
Externí odkaz:
https://doaj.org/article/0715be82110d4571adf3516dbe4df593
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 4497-4509 (2016)
Monsoon inversion (MI) over the Arabian Sea (AS) is one of the important characteristics associated with the monsoon activity over Indian region during summer monsoon season. In the present study, we have used 5 years (2009–2013) of temperature
Externí odkaz:
https://doaj.org/article/1450c3a2d5f64a64a624e0b36b0f7fd5
Autor:
P. Vishnu Prasanth, V. Sivakumar, S. Sridharan, Y. Bhavani Kumar, H. Bencherif, D. Narayana Rao
Publikováno v:
Annales Geophysicae, Vol 27, Pp 3811-3823 (2009)
In this paper, we present seasonal and nocturnal variations of mesospheric sodium (Na) layer parameters observed over Gadanki (13.5° N, 79.2° E), based on 166 nights during the period from January 2005 to December 2006, for the first time. The t
Externí odkaz:
https://doaj.org/article/bed918c6596143ad8f3f92c22dcfdcd6
Autor:
H. Chandra, H. S. S. Sinha, U. Das, R. N. Misra, S. R. Das, J. Datta, S. C. Chakravarty, A. K. Patra, N. Venkateswara Rao, D. Narayana Rao
Publikováno v:
Annales Geophysicae, Vol 26, Pp 2725-2738 (2008)
A campaign to study turbulence in the mesosphere, over low latitudes in India, using rocket-borne measurements and Indian MST radar, was conducted during July 2004. A rocket-borne Langmuir probe detected a spectrum of electron density irregulariti
Externí odkaz:
https://doaj.org/article/6566ac715cef47aa96bcaa25b7ad4347
Publikováno v:
Annales Geophysicae, Vol 26, Pp 2531-2542 (2008)
A high-power acoustic exciter was designed and developed for the Gadanki MST Radar to facilitate observations in the Radio Acoustic Sounding System (RASS) mode. Sweep range of acoustic signal frequencies was set to 94–125 Hz so as to satisfy Brag
Externí odkaz:
https://doaj.org/article/fef13b9f5c564433a8985c113f424bae