Results 31 to 40 of about 12,217,136 (305)

Low Latitude Spread-F Occurrence during June Solstice and September Equinox of Sunspot Minimum [PDF]

, 2016
Ionosonde data from four low-latitude stations cutting across the two hemispheres have been employed to study the occurrence of spread-F. Quiet time ionograms for two months representing two seasons; June solstice and September equinox of the year 2010,
Agunbiade, G., Oladipo, O.A., Olawepo, A.O., Ikubanni, S.O., Adeniyi, J.O., Adimula, I.A.   +5 more
core   +2 more sources

Ionosonde Observations of Spread F and Spread Es at Low and Middle Latitudes during the Recovery Phase of the 7–9 September 2017 Geomagnetic Storm

Remote Sensing, 2021
This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm.
Lehui Wei, Chunhua Jiang, Yaogai Hu, Ercha Aa, Wengeng Huang, Jing Liu, Guobin Yang, Zhengyu Zhao   +7 more
doaj   +1 more source

Nonlinear equatorial spread F

Geophysical Research Letters, 1976
A numerical simulation of the non‐linear evolution of the collisional Rayleigh‐Taylor instability using a set of equations appropriate for the equatorial F region ionosphere has been performed. Our results show that the irregularities produced by the instability grow on the bottomside of the F region peak, as predicted by linear theory, and then the ...
Anthony J. Scannapieco, Sidney L. Ossakow   +1 more
openaire   +1 more source

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya [PDF]

Annales Geophysicae, 2015
We analyze the data recorded during December 2011–November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6° E, 18.3° N; dip lat.
Y. Zhang, Y. Zhang, Y. Zhang, W. Wan, W. Wan, G. Li, G. Li, L. Liu, L. Liu, L. Hu, L. Hu, B. Ning, B. Ning   +12 more
doaj   +1 more source

Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours

Space Weather, 2021
In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented.
Lehui Wei, Chunhua Jiang, Ting Lan, Wenxuan Wang, Hua Shen, Ercha Aa, Wengeng Huang, Jing Liu, Guobin Yang, Yaogai Hu, Zhengyu Zhao   +10 more
doaj   +1 more source

Correlation of spread-F activity with F-region height changes

, 1960
A new scheme of spread-F indices is developed to suit the equatorial spread-F observations and applied to estimate the correlation coefficient between spread-F activity and F-region height ...
Gopala Rao, M. S. V., Ramachandra Rao, B., Ramachandra Rao Pant, P.   +2 more
core   +1 more source

Central Nervous System Tumors Among Infants in Canada: A Report From CYP‐C

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) tumors in infants are rare, pose unique clinical challenges, and lack large‐scale evidence‐based data to guide management. This study seeks to describe CNS tumors in Canadian infants and to compare their outcomes with those of older children.
Samuel Sassine, Hallie Coltin, Sylvia Cheng, Lucie Lafay‐Cousin, Vanan Issai Magimairajan, Craig Erker, Stéphanie Vairy, Lynette Bowes, Adam Fleming, Donna Johnston, Sarah McKillop, Roona Sinha, Julie Bennett, Christina Coleman, Laura Wheaton, Shayna Zelcer, Samuele Renzi, Thai Hoa Tran   +17 more
wiley   +1 more source

Equatorial Spread F & F-layer Height [PDF]

, 1978
166-170From a study of h' Fvariations under non-spread F, short duration spread F, spread F with subsequent reappearance and long duration spread F conditions at Ibadan, Trivandrum and Singapore, the following conclusions have been drawn: (i) The onset ...
Subrahmanyam, V, Rao, M Srirama
core  

Comparative Drug Response Profiling in Neuroblastoma Cell Lines and Patient‐Derived Tumor Organoids

Pediatric Blood &Cancer, EarlyView.
ABSTRACT High‐risk neuroblastoma remains a leading cause of pediatric cancer mortality, and improved preclinical models are needed to guide therapeutic developments. We screened seven high‐risk neuroblastoma cell lines and three patient‐derived tumor organoids with 528 compounds alongside bone marrow controls, and compared them with external datasets ...
Krzysztof Wierbiłowicz, Se Whee Sammy Park, Aironas Los, Ernest Liu, Nona Struyf, Tom Erkers, Sören Lehmann, Jan J. Molenaar, Jakob Stenman, Olli Kallioniemi, Päivi Östling, Brinton Seashore‐Ludlow, Kasper Karlsson   +12 more
wiley   +1 more source

Social Functioning Within the First Years After Pediatric Brain Tumor Diagnosis and the Relationship With Family Psychosocial Risk

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survivors of pediatric brain tumors (PBTs) can experience long‐term social difficulties, impacting quality of life. Beyond medical and environmental factors, family psychosocial risk may play a role in social outcomes by shaping the caregiving environment and may provide intervention options.
Renske H. Houben, Marisa H. Huisman, Martha A. Grootenhuis, Femke K. Aarsen, Marita Partanen   +4 more
wiley   +1 more source