Results 71 to 80 of about 5,343,913 (293)

Age-Related Variations in Tumor Suppressor Genes and Hormone Receptor Expression in Breast Cancer Patients

open access: yesمجله كليه طب الكندي
Background: This study investigated the immunohistochemical expression of hormone receptors (ER, PR, HER2, Ki-67) and tumor suppressor genes (PTEN, p53) in women with breast cancer from Erbil, Iraq, focusing on how these expressions relate to patient ...
Mehri Mirhaj Mohammedsalih   +1 more
doaj   +1 more source

Investigating the role of gravity waves in mesosphere and lower-thermosphere (MLT) inversions at low latitudes [PDF]

open access: yesAnnales Geophysicae
The mesosphere and lower-thermosphere (MLT) transitional region, encompassing a height range of 60–100 km, is a distinct and highly turbulent zone within Earth's atmosphere.
C. Lingerew, U. J. P. Raju
doaj   +1 more source

Monthly mean climatology of the prevailing winds and tides in the Arctic mesosphere/lower thermosphere [PDF]

open access: yesAnnales Geophysicae, 2004
The Arctic MLT wind regime parameters measured at the ground-based network of MF and meteor radar stations (Andenes 69° N, Tromsø 70° N, Esrange 68° N, Dixon 73.5° N, Poker Flat 65° N and Resolute Bay 75° N) are discussed ...
Y. I. Portnyagin   +16 more
doaj   +1 more source

Diurnal and Seasonal Variation of High-Frequency Gravity Waves at Mohe and Wuhan

open access: yesAtmosphere, 2022
Using the meteor radar data at the Mohe (53.5° N, 122.3° E) and Wuhan (30.5° N, 114.2° E) regions over China, this paper conducts a study on the diurnal and seasonal variation of high-frequency (within 2 h) gravity waves (GWs) activity in the mesosphere ...
Yiyun Wu   +4 more
doaj   +1 more source

Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations. [PDF]

open access: yes, 2015
Substorms generally inject tens to hundreds of keV electrons, but intense substorm electric fields have been shown to inject MeV electrons as well. An intriguing question is whether such MeVelectron injections can populate the outer radiation belt.
Angelopoulos, Vassilis   +24 more
core   +2 more sources

Would El Niño enhance or suppress the migrating diurnal tide in the MLT region? [PDF]

open access: yes, 2021
Abstract. Previous observations and simulations are controversial as to whether El Niño will increase or decrease the diurnal tide (DW1) in the upper mesosphere and lower thermosphere (MLT) region. This study revisited the linear response of the MLT DW1 to El Niño during the winter (December-January-February) based on 19-year satellite observations of ...
Yetao Cen   +5 more
openaire   +1 more source

Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements [PDF]

open access: yesAtmospheric Chemistry and Physics, 2010
The occurrence of a sudden stratospheric warming (SSW) excites disturbances in the mesosphere-lower thermospheric (MLT) wind and temperature. Here, we have examined the high frequency (HF) radar wind data from the South African National Antarctic ...
N. Mbatha   +4 more
doaj   +1 more source

Occurrences of VLF Hiss and Saucer Emissins in the Southern Polar Region (c. Wave-Particle Interactions in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I)

open access: yesAntarctic Record, 1980
Satellite data acquisition facilities for ISIS-1 and 2 were built up at Syowa Station in January 1976, and the VLF wideband and topside sounder data have been received on the routine basis since April 1976.
Takeo YOSHINO   +4 more
doaj   +1 more source

Performance Modulation for Back-Illuminated AlGaN Ultraviolet Avalanche Photodiodes Based on Multiplication Scaling

open access: yesIEEE Photonics Journal, 2019
Back-illuminated Al0.1Ga0.9N ultraviolet avalanche photodiodes (APDs) of various multiplication widths were fabricated on AlN templates with a separate absorption and multiplication structure.
Qing Cai   +9 more
doaj   +1 more source

Semi-annual oscillation (SAO) of the nighttime ionospheric D region as detected through ground-based VLF receivers [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
Earth's middle and upper atmosphere exhibits several dominant large-scale oscillations in many measured parameters. One of these oscillations is the semi-annual oscillation (SAO). The SAO can be detected in the ionospheric total electron content (TEC),
I. Silber, C. Price, C. J. Rodger
doaj   +1 more source

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