Zobrazeno 1 - 10
of 1 177
pro vyhledávání: '"A. Knizhnik"'
An expansion of cross-sectional area directly impacts the mass flow along a coronal loop, and significantly alters the radiative and hydrodynamic evolution of that loop as a result. Previous studies have found that an area expansion from chromosphere
Externí odkaz:
http://arxiv.org/abs/2403.12358
Autor:
Knizhnik, Kalman J., Weberg, Micah J., Provornikova, Elena, Warren, Harry P., Linton, Mark G., Shaik, Shaheda Begum, Ko, Yuan-Kuen, Schonfeld, Samuel J., Ugarte-Urra, Ignacio, Upton, Lisa A.
The launches of Parker Solar Probe (Parker) and Solar Orbiter (SolO) are enabling a new era of solar wind studies that track the solar wind from its origin at the photosphere, through the corona, to multiple vantage points in the inner heliosphere. A
Externí odkaz:
http://arxiv.org/abs/2402.10432
Autor:
Kalman J. Knizhnik
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Space weather models endeavoring to connect remote observations to in-situ measurements at various locations in the heliosphere invariably require a coronal model to connect the photosphere magnetically to the inner heliosphere. The most famous and p
Externí odkaz:
https://doaj.org/article/8824c7a308a8422e97e8d7a8c9d45c00
The Modboat is a low-cost, underactuated, modular robot capable of surface swimming, docking to other modules, and undocking from them using only a single motor and two passive flippers. Undocking is achieved by causing intentional self-collision bet
Externí odkaz:
http://arxiv.org/abs/2211.16611
Publikováno v:
Computational and Theoretical Chemistry 1214, 113755 (2022)
We investigate how parameters of the model of semi-infinite graphene based on a graphene nanoribbon under periodic boundary conditions affect the accuracy of ab initio calculations of reactions at graphene edges by the example of the first stage of r
Externí odkaz:
http://arxiv.org/abs/2211.04181
Publikováno v:
J. Phys. Chem. Lett. 13, 10326 - 10330 (2022)
Ab initio calculations are performed to study consecutive reconstruction of a zigzag graphene edge. According to the obtained energy profile along the reaction pathway, the first reconstruction step, formation of the first pentagon-heptagon pair, is
Externí odkaz:
http://arxiv.org/abs/2211.02514
It is extremely difficult to simulate the details of coronal heating and also make meaningful predictions of the emitted radiation. Thus, testing realistic models with observations is a major challenge. Observational signatures of coronal heating dep
Externí odkaz:
http://arxiv.org/abs/2211.00104
Delta ($\delta$)-spots are active regions (ARs) in which positive and negative umbrae share a penumbra. They are known to be the source of strong flares. We introduce a new quantity, the degree of $\delta$ (Do$\delta$), to measure the fraction of umb
Externí odkaz:
http://arxiv.org/abs/2209.09381
Autor:
Knizhnik, Gedaliah, Yim, Mark
The Modboat is a low-cost, underactuated, modular robot capable of surface swimming, docking to other modules, and undocking from them using only a single motor and two passive flippers. Undocking is achieved by causing intentional self-collision bet
Externí odkaz:
http://arxiv.org/abs/2209.04000
We present a flow-based control strategy that enables resource-constrained marine robots to patrol gyre-like flow environments on an orbital trajectory with a periodicity in a given range. The controller does not require a detailed model of the flow
Externí odkaz:
http://arxiv.org/abs/2203.00796