Results 281 to 290 of about 255,861 (341)

On the nature of gamma-ray burst time dilations

open access: green, 1994
R. A. M. J. Wijers, B. Paczyński
openalex   +2 more sources

Ultrasound fundamentals and their clinical implications for interventional cytopathologists

open access: yesCytopathology, Volume 36, Issue 4, Page 356-374, July 2025.
Interventional cytopathologists need to know about ultrasound physics and instrumentation to produce an image that faithfully recreates the lesion discovered by the sonographer and diagnosed by the radiologist. A deep quantitative understanding of physics is not required.
David Lieu
wiley   +1 more source

Politically Connected Firms: Trade, Competition and Rent‐Seeking

open access: yesGovernance, Volume 38, Issue 3, July 2025.
ABSTRACT This paper examines how companies respond to global economic shocks by seeking political connections. Using company‐level data, the study explores how exposure to increased trade competition—specifically, rising Chinese imports—affects U.S. firms' lobbying strategies.
David Coen, Matia Vannoni
wiley   +1 more source

Multiwavelength constraints on the origin of a nearby repeating fast radio burst source in a globular cluster. [PDF]

open access: yesNat Astron
Pearlman AB   +28 more
europepmc   +1 more source

A guide to understanding and measuring photosynthetic induction: considerations and recommendations

open access: yesNew Phytologist, Volume 247, Issue 2, Page 450-469, July 2025.
Summary Photosynthetic induction is the leaf‐level process by which a plant assimilates CO2 from the atmosphere once exposed to a change in light intensity after a period of darkness or shade. In the field, photosynthetic induction can take place hundreds of times in a single day in response to rapid fluctuations in the light environment due to cloud ...
Liana G. Acevedo‐Siaca   +1 more
wiley   +1 more source

Gamma Ray Bursts Have Millisecond Variability

open access: green, 1998
Katharine C. Walker   +2 more
openalex   +2 more sources

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