Zobrazeno 1 - 10
of 61
pro vyhledávání: '"P. J. Steyn"'
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 144 (2024)
Drifts due to the gradients in, and curvatures of, the heliospheric magnetic field (HMF) play a significant role in the transport of galactic cosmic rays (GCRs) in the heliosphere. Although this has been well studied for the Parker HMF, the influence
Externí odkaz:
https://doaj.org/article/e0635e8a44f04958b38ae4d4618a3fcf
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 77 (2024)
The solar minima between solar cycles 22–23, 23–24, and 24–25 are the best observed minima on record. In situ solar wind and interplanetary magnetic field measurements by the Wind and ACE spacecraft at L1 with 1 hr cadence are explored using wa
Externí odkaz:
https://doaj.org/article/b14a123e15a8461a982f24c682d9dc64
Autor:
Devojyoti Kansabanik, Surajit Mondal, Divya Oberoi, James O. Chibueze, N. E. Engelbrecht, R. D. Strauss, E. P. Kontar, G. J. J. Botha, P. J. Steyn, Amoré E. Nel
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 96 (2024)
Solar radio emissions provide several unique diagnostics to estimate different physical parameters of the solar corona, which are otherwise simply inaccessible. However, imaging the highly dynamic solar coronal emissions spanning a large range of ang
Externí odkaz:
https://doaj.org/article/5b923b5b7fc94e46a8a7d5f8defc4d6a
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 2 (2023)
The processes responsible for the acceleration of solar energetic particles (SEPs) are still not well understood, including whether SEP electrons and protons are accelerated by common or separate processes. Using a numerical particle transport model
Externí odkaz:
https://doaj.org/article/7c0bedd35adf4b2694cd981093cae577
Publikováno v:
South African Journal of Business Management, Vol 33, Iss 3, Pp 53-62 (2002)
This paper describes a case study in which Data Envelopment Analysis (DEA) methodology was combined with regression analysis to evaluate the efficiency of an Internal Audit (IA) department over twelve consecutive months. Efficiency of audit projects
Externí odkaz:
https://doaj.org/article/210bd2590e384c5083e3d0f3eb2df5dc
Autor:
Restuadi Restuadi, Frederik J. Steyn, Edor Kabashi, Shyuan T. Ngo, Fei-Fei Cheng, Marta F. Nabais, Mike J. Thompson, Ting Qi, Yang Wu, Anjali K. Henders, Leanne Wallace, Chris R. Bye, Bradley J. Turner, Laura Ziser, Susan Mathers, Pamela A. McCombe, Merrilee Needham, David Schultz, Matthew C. Kiernan, Wouter van Rheenen, Leonard H. van den Berg, Jan H. Veldink, Roel Ophoff, Alexander Gusev, Noah Zaitlen, Allan F. McRae, Robert D. Henderson, Naomi R. Wray, Jean Giacomotto, Fleur C. Garton
Publikováno v:
Genome Medicine, Vol 14, Iss 1, Pp 1-22 (2022)
Abstract Background Amyotrophic lateral sclerosis (ALS) is a complex, late-onset, neurodegenerative disease with a genetic contribution to disease liability. Genome-wide association studies (GWAS) have identified ten risk loci to date, including the
Externí odkaz:
https://doaj.org/article/554d6d92682e49b2a277f81cb79542d2
Publikováno v:
South African Journal of Psychiatry, Vol 28, Iss 0, Pp e1-e8 (2022)
Background: Emotional dysregulation in psychiatric disorders contributes to morbidity, mortality and healthcare costs. Dialectical behaviour therapy (DBT) is effective in addressing this, but is complex and costly to implement. Recent literature indi
Externí odkaz:
https://doaj.org/article/35c14429f8654106b5b996b8dd79836d
An exercise 'sweet spot' reverses cognitive deficits of aging by growth-hormone-induced neurogenesis
Autor:
Daniel G. Blackmore, Frederik J. Steyn, Alison Carlisle, Imogen O’Keeffe, King-Year Vien, Xiaoqing Zhou, Odette Leiter, Dhanisha Jhaveri, Jana Vukovic, Michael J. Waters, Perry F. Bartlett
Publikováno v:
iScience, Vol 24, Iss 11, Pp 103275- (2021)
Summary: Hippocampal function is critical for spatial and contextual learning, and its decline with age contributes to cognitive impairment. Exercise can improve hippocampal function, however, the amount of exercise and mechanisms mediating improveme
Externí odkaz:
https://doaj.org/article/3047f38d7a0d44598f65f789ccf182a5
Autor:
Silvia Scaricamazza, Illari Salvatori, Giacomo Giacovazzo, Jean Philippe Loeffler, Frederique Renè, Marco Rosina, Cyril Quessada, Daisy Proietti, Constantin Heil, Simona Rossi, Stefania Battistini, Fabio Giannini, Nila Volpi, Frederik J. Steyn, Shyuan T. Ngo, Elisabetta Ferraro, Luca Madaro, Roberto Coccurello, Cristiana Valle, Alberto Ferri
Publikováno v:
iScience, Vol 23, Iss 5, Pp - (2020)
Summary: Patients with ALS show, in addition to the loss of motor neurons in the spinal cord, brainstem, and cerebral cortex, an abnormal depletion of energy stores alongside hypermetabolism. In this study, we show that bioenergetic defects and muscl
Externí odkaz:
https://doaj.org/article/93e692a5f29146c4b56df3efb45dd920
Publikováno v:
Frontiers in Neurology, Vol 10 (2019)
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by the deterioration of motor neurons. However, this complex disease extends beyond the boundaries of the central nervous system, with metabolic alterations being obser
Externí odkaz:
https://doaj.org/article/07150122a6f040bf8c1e8b1f563b26bb