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of 2 927
pro vyhledávání: '"Kennedy, D. A."'
Electromagnetic microtearing modes (MTMs) have been observed in many different spherical tokamak regimes. Understanding how these and other electromagnetic modes nonlinearly saturate is likely critical in understanding the confinement of a high $\bet
Externí odkaz:
http://arxiv.org/abs/2409.08216
Starting from the assumption that saturation of plasma turbulence driven by temperature-gradient instabilities in fusion plasmas is achieved by a local energy cascade between a long-wavelength outer scale, where energy is injected into the fluctuatio
Externí odkaz:
http://arxiv.org/abs/2405.00854
Autor:
Giacomin, M., Dickinson, D., Dorland, W., Mandell, N. R., Bokshi, A., Casson, F. J., Dudding, H. G., Kennedy, D., Patel, B. S., Roach, C. M.
A quasi-linear reduced transport model is developed from a database of high-$\beta$ electromagnetic nonlinear gyrokinetic simulations performed with Spherical Tokamak for Energy Production (STEP) relevant parameters. The quasi-linear model is fully e
Externí odkaz:
http://arxiv.org/abs/2404.17453
Autor:
Kennedy, D., Roach, C. M., Giacomin, M., Ivanov, P., Adkins, T., Sheffield, F., örler, T. G, Bokshi, A., Dickinson, D., Dudding, H. G., Patel, B. S.
[ABRIDGED] This paper discusses the importance of parallel perturbations of the magnetic-field in gyrokinetic simulations of electromagnetic instabilities and turbulence at mid-radius in the burning plasma phase of the conceptual high-$\beta$, reacto
Externí odkaz:
http://arxiv.org/abs/2402.10583
Publikováno v:
Plasma Phys. Control. Fusion 65 095019 (2023)
First nonlinear gyrokinetic simulations of microtearing modes in the core of a MAST case are performed on two surfaces of the high-collisionality discharge used in Valovi\v{c} et al. Nucl. Fusion 51.7 (2011) to obtain the favorable energy confinement
Externí odkaz:
http://arxiv.org/abs/2303.02379
Publikováno v:
BMC Infectious Diseases, Vol 23, Iss 1, Pp 1-9 (2023)
Abstract Introduction Urinary tract infection (UTI) is the second most common infectious disease affecting more than 150 million people globally annually. Uropathogenic E. coli (UPEC), the predominant cause of UTI, can occur as a biofilm associated w
Externí odkaz:
https://doaj.org/article/e29dd60bdf7f420a82e39cfc800e436a
Autor:
Stephanie Hasapis, Isibel Caraballo, Timothy J. Sears, Kennedy D. Brock, John B. Cart, Everett J. Moding, Chang-Lung Lee
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-9 (2023)
Abstract The tumor suppressor p53 is a transcriptional factor that plays a crucial role in controlling acute toxicity and long-term malignant transformation of hematopoietic cells induced by genotoxic stress such as ionizing radiation. Among all tran
Externí odkaz:
https://doaj.org/article/4a5f84520fb64649acbc501f6aef2551
Autor:
Hanuka, Adi, Huang, X., Shtalenkova, J., Kennedy, D., Edelen, A., Lalchand, V. R., Ratner, D., Duris, J.
Publikováno v:
Phys. Rev. Accel. Beams 24, 072802 (2021)
High-dimensional optimization is a critical challenge for operating large-scale scientific facilities. We apply a physics-informed Gaussian process (GP) optimizer to tune a complex system by conducting efficient global search. Typical GP models learn
Externí odkaz:
http://arxiv.org/abs/2009.03566
Autor:
Mahdavi, Kennedy D., Jordan, Sheldon E., Jordan, Kaya G., Rindner, Elisabeth S., Haroon, Jonathan M., Habelhah, Barshen, Becerra, Sergio A., Surya, Jean Rama, Venkatraman, Victoria, Zielinski, Margaret A., Spivak, Norman M., Bystritsky, Alexander, Kuhn, Taylor P.
Publikováno v:
In Journal of Psychiatric Research December 2023 168:125-132
Operating large-scale scientific facilities often requires fast tuning and robust control in a high dimensional space. In this paper we introduce a new physics-informed optimization algorithm based on Gaussian process regression. Our method takes adv
Externí odkaz:
http://arxiv.org/abs/1911.01538