Results 91 to 100 of about 34,519 (239)

The Spectral Energy Distribution of Fermi bright blazars [PDF]

open access: yes, 2009
(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the \gamma-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS).
A. A. Abdo   +309 more
core   +4 more sources

Long-term optical monitoring of TeV emitting blazars [PDF]

open access: yesAstronomy & Astrophysics, 2018
We present ten years of R-band monitoring data of 31 northern blazars which were either detected at very high-energy (VHE) gamma rays or listed as potential VHE gamma-ray emitters.
K. Nilsson   +20 more
semanticscholar   +1 more source

Exploring the Impact of Preoperative Laboratory Values on Short‐Term Outcomes in Complex Carpal Tunnel Decompression Surgery

open access: yesAdvances in Orthopedics, Volume 2025, Issue 1, 2025.
Background: The present study analyzes the effects of preoperative serum albumin, hematocrit, and creatinine on postoperative outcomes in patients undergoing carpal tunnel decompression surgery. Methods: The American College of Surgeons National Quality Improvement Program (NSQIP) database was queried from 2011 to 2020.
Anitesh Bajaj   +6 more
wiley   +1 more source

Lower limits on ultrahigh-energy cosmic ray and jet powers of TeV blazars

open access: yes, 2011
Lower limits on the power emitted in ultrahigh-energy cosmic rays (UHECRs), which are assumed to be protons with energy 1e17-1e20 eV, are derived for TeV blazars with the assumption that the observed TeV gamma rays are generated due to interactions of ...
Dermer, Charles D.   +2 more
core   +1 more source

The Blazar Sequence: Validity and Predictions [PDF]

open access: yes, 2006
The "blazar sequence" posits that the most powerful BL Lacertae objects and flat-spectrum radio quasars should have relatively small synchrotron peak frequencies, nu_peak, and that the least powerful such objects should have the highest nu_peak values ...
A. Caccianiga   +23 more
core   +2 more sources

The Impact of Plasma Instabilities on the Spectra of TeV Blazars [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
Relativistic jets from blazars are known to be sources of very-high-energy gamma rays (VHEGRs). During their propagation in the intergalactic space, VHEGRs interact with pervasive cosmological photon fields such as the extragalactic background light ...
R. A. Batista   +2 more
semanticscholar   +1 more source

Can teaching be taught? Improving teachers' pedagogical skills at scale in rural Peru

open access: yesQuantitative Economics, Volume 16, Issue 1, Page 185-233, January 2025.
We evaluate the impact of a large‐scale teacher coaching program in Peru, a context with high teacher turnover, on teachers' pedagogical skills and student learning. Previous studies find that small‐scale coaching programs can improve teaching of reading and science in developing countries.
Juan F. Castro   +4 more
wiley   +1 more source

Blazars in the early Universe [PDF]

open access: yes, 2011
We investigate the relative occurrence of radio--loud and radio-quiet quasars in the first billion years of the Universe, powered by black holes heavier than one billion solar masses. We consider the sample of high-redshfit blazars detected in the hard X-
Abdo   +48 more
core   +1 more source

X-ray properties of z > 4 blazars [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
We present the X-ray analysis of the largest flux-limited complete sample of blazar candidates at z > 4 selected from the Cosmic Lens All Sky Survey (CLASS).
L. Ighina   +8 more
semanticscholar   +1 more source

Research on teachers of colour and minoritised teachers in majoritarian education systems: A scoping review of the literature in the last two decades

open access: yesReview of Education, Volume 12, Issue 3, December 2024.
Abstract The world map is changing due to waves of immigration, population and demographic changes in mainland Europe and North America. There is a growing need for a more diverse teacher workforce to close the racial and ethnic gap between students and teachers in populations with high diversity.
Eman Abo‐Zaed Arar, Ahmed Tlili
wiley   +1 more source

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