Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Raghwendra Kumar"'
Background: The rapid advancements in technology to measure different bodily functions have enabled normal person to measure various biological values of a body such as a heartbeat, calories, blood pressure, and more. These measurements can help heal
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-124865
Publikováno v:
Physics of Plasmas. 29:103303
We perform particle-in-cell simulations of thermionic emission from hemi-ellipsoidal shaped needle emitters. The Schottky corrected Richardson–Dushman equation is used to compute the emitted current from the curved emitter surface. It is shown that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e04d02d9b9c10755c4cc39fadceefa0b
https://doi.org/10.1063/5.0109510
https://doi.org/10.1063/5.0109510
Autor:
Rohit N. Kulkarni, Shobha Deshpande, Raghwendra Kumar, Abhijit Bopardikar, Sujit Bopardikar, Sumeet Raut, Pradeep Somalapur
Publikováno v:
Journal of Advanced Oral Research. 10:97-104
Background and Objective: Mesenchymal stem cells (MSCs) from many different dental tissues have enormous potential in tissue regeneration and immunotherapy. MSCs isolated and cultured in many different ways are known for their heterogenecity expresse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34fc439c258ad30418ac2d9caac4006a
https://doi.org/10.1177/2320206819882592
https://doi.org/10.1177/2320206819882592
Autor:
Raghwendra Kumar, Pankaj Kumar
Publikováno v:
Optics Communications. 514:128142
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b1f968001d59cccb6280696bcbe854c
https://doi.org/10.1016/j.optcom.2022.128142
https://doi.org/10.1016/j.optcom.2022.128142
Publikováno v:
Physics of Plasmas. 29:073102
A large area field emitter (LAFE) typically consists of several thousands of nanoscale emitting tips. These are difficult to simulate using purely numerical methods based on finite/boundary element or finite difference methods. We show here that a se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::721072c9dc2ba7017125534a2100f026
https://doi.org/10.1063/5.0098811
https://doi.org/10.1063/5.0098811
The electric field at the surface of a curved emitter is necessary to calculate the field emission current. For smooth parabolic emitting tips where space charge is negligible, variation of the electric field at the surface is known to follow the gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acd50951fdba6c77f1e7a5afde442bf1
The maximum current that can be transported across a vacuum diode is limited by forces arising due to space charge. In a planar diode configuration, the space charge limited (SCL) current density from a planar emitting patch is given by the Child-Lan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d43d2c00f6ee7474feb3cc652a47890
Multi-stage cathodes are promising candidates for field emission due to the multiplicative effect in local field predicted by the Schottky conjecture and its recent corrected counterpart [J. Vac. Sci. Technol. B 38, 023208 (2020)]. Due to the large v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2084c954853f1278075aa0a174b69c7f
Publikováno v:
Journal of Applied Physics. 130:185302
Field emission studies incorporating the effect of space charge reveal that for planar emitters, the steady-state field $E_P$, after initial transients, settles down to a value lower than the vacuum field $E_L$. The ratio $\vartheta = E_P/E_L$ is a m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3da3474eb0e3a0437d3c253a2b0d99c
https://doi.org/10.1063/5.0070368
https://doi.org/10.1063/5.0070368
Publikováno v:
2019 Workshop on Recent Advances in Photonics (WRAP).
We present a simple metamaterial absorber suitable for large areas fabrication based on the cavity and guided-mode resonance. The absorber consists of tri-layer of gold, ZnS and gold on the photoresist micro-structures. The micro-structures were fabr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9619591648fc2f23b144cdcc3f9b7c42
https://doi.org/10.1109/wrap47485.2019.9013726
https://doi.org/10.1109/wrap47485.2019.9013726