Results 131 to 140 of about 18,332,721 (387)

The Core of Omega Centauri (NGC 5139) Lithograph and In Search of...Stellar Evolution Classroom Activity [PDF]

open access: yes, 2010
This Hubble Space Telescope image reveals a small region inside the massive globular cluster Omega Centauri, which boasts nearly 10 million stars. This colorful assortment of 100,000 stars residing in the crowded core of the cluster is one of the first ...

core  

Socio-Spatial Group Queries for Impromptu Activity Planning

open access: yes, 2015
The development and integration of social networking services and smartphones have made it easy for individuals to organize impromptu social activities anywhere and anytime. Main challenges arising in organizing impromptu activities are mostly due to the
Chen, Ming-Syan   +4 more
core   +1 more source

An Innovative Context-Based Crystal-Growth Activity Space Method for Environmental Exposure Assessment: A Study Using GIS and GPS Trajectory Data Collected in Chicago

open access: yesInternational Journal of Environmental Research and Public Health, 2018
Scholars in the fields of health geography, urban planning, and transportation studies have long attempted to understand the relationships among human movement, environmental context, and accessibility.
Jue Wang, M. Kwan, Y. Chai
semanticscholar   +1 more source

CDK11 inhibition induces cytoplasmic p21WAF1 splice variant by p53 stabilisation and SF3B1 inactivation

open access: yesMolecular Oncology, EarlyView.
CDK11 inhibition stabilises the tumour suppressor p53 and triggers the production of an alternative p21WAF1 splice variant p21L, through the inactivation of the spliceosomal protein SF3B1. Unlike the canonical p21WAF1 protein, p21L is localised in the cytoplasm and has reduced cell cycle‐blocking activity.
Radovan Krejcir   +12 more
wiley   +1 more source

Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region

open access: yesGeophysical Research Letters
Atomic hydrogen (H) is crucial for understanding photochemistry and the energy budget in the mesopause region. However, there is still no consensus on the H abundance in this region.
Xiaolin Wu   +4 more
doaj   +1 more source

Reduced vascular leakage correlates with breast carcinoma T regulatory cell infiltration but not with metastatic propensity

open access: yesMolecular Oncology, EarlyView.
A mouse model for vascular normalization and a human breast cancer cohort were studied to understand the relationship between vascular leakage and tumor immune suppression. For this, endothelial and immune cell RNAseq, staining for vascular function, and immune cell profiling were employed.
Liqun He   +8 more
wiley   +1 more source

Two‐Dimensional Motions of Diffuse Auroral Patches Under Upstream Dynamic Pressure Enhancements of the Bow Shock

open access: yesGeophysical Research Letters
In this study, we identified 51 dayside diffuse auroral patches and examined their two‐dimensional evolutions by using the Time History of Events and Macroscale Interactions during Substorms probes and the ground‐based all‐sky imager at the South Pole ...
Xinyu Xu   +6 more
doaj   +1 more source

Quantitative analysis of nighttime effects of radiation belt energetic electron precipitation on the D-region ionosphere during lower solar activity periods [PDF]

open access: yesAtmospheric Chemistry and Physics
Energetic electron precipitation (EEP) from the Earth's radiation belts can ionize neutral molecules in the D-region ionosphere (60–90 km altitude), significantly influencing the conductivity and chemical species therein.
X. Dong   +23 more
doaj   +1 more source

The Connection between 3.3 {\mu}m PAH Emission and AGN Activity

open access: yes, 2012
We investigate the connection between starburst and AGN activity by comparing the 3.3 {\mu}m PAH eimission with AGN properties. Utilizing the slit-less spectroscopic capability of the AKARI space telescope, we observe moderate-luminosity Type I AGN at z ...
Ballantyne   +50 more
core   +1 more source

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