Results 61 to 70 of about 405 (198)

Ultrasound radiomics based on axillary lymph nodes images for predicting lymph node metastasis in breast cancer. [PDF]

open access: yesFront Oncol, 2023
Tang YL   +7 more
europepmc   +1 more source

Finding Fireballs in Lightning: A Daily Pipeline to Find Meteors in Weather Satellite Data

open access: yesEarth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Weather satellite data contains a wealth of information well beyond its application to meteorology. The GOES weather satellite Geostationary Lightning Mapper instruments detect millions of lightning strikes per day. Within these “haystacks” of lightning are a handful of “needles” of bolides (aka bright fireballs, or exploding meteors). We have
Jeffrey C. Smith   +6 more
wiley   +1 more source

Sonic boom prediction and minimization using computational fluid dynamics

open access: yes, 1992
This paper describes the NASA ARC program in sonic boom prediction methodologies. This activity supports NASA's High Speed Research Program (HSRP). An overview of the program, recent results, conclusions, and current effort will be given.
Cheung, Samson   +5 more
core  

Frequency‐Dependent Acoustic Reflection Coefficients of Flat Ground Assessed Using the Sonic Boom From the OSIRIS‐Rex Sample Return Capsule Recorded on Free Flying Balloons

open access: yesGeophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Low frequency sound can travel great distances in planetary atmospheres. When these waves reflect off the air/ground interface, energy may be absorbed or transferred to mechanical waves in the subsurface. This study describes the direct and reflected acoustic wave generated by the re‐entry of the OSIRIS‐REx Sample Return Capsule captured on a ...
Daniel C. Bowman   +12 more
wiley   +1 more source

Sonic-boom research: Selected bibliography with annotation

open access: yes, 1986
Citations of selected documents are included which represent the state of the art of technology in each of the following subject areas: prediction, measurement, and minimization of steady-flight sonic booms; prediction and measurement of accelerating ...
Maglieri, D. J.   +2 more
core  

Crystal Structure and Conformational Dynamics of N─N Bond‐Forming Piperazate Synthase

open access: yesChemBioChem, Volume 27, Issue 12, 26 June 2026.
Piperazate synthases (PZSs) catalyze the key N─N bond formation in the biosynthesis of the rare amino acid piperazic acid. X‐ray crystal structures of apo‐ and holo‐SbPZS show a dimeric enzyme with two heme‐containing active sites, where histidine residues coordinate the iron centers.
Nikita Pal   +7 more
wiley   +1 more source

Overview of Sonic boom CFD prediction methodology in use at ONERA and its application to Supersonic Business Jet configuration design

open access: yes, 2011
International audienceWhilst the interest of industry for a second generation (post-Concorde) large supersonic transport seems to be, today, very limited, several pre-industrial research projects for a smaller civil supersonic aircraft have been ...
Carrier, Gérald   +4 more
core   +1 more source

A Functionally Conserved Enhancer is Critical for PGC1A Expression and Thermogenesis in Brown Fat

open access: yesAdvanced Science, Volume 13, Issue 31, 4 June 2026.
An evolutionarily conserved enhancer controls PGC1A expression and thermogenic activation in brown adipose tissue. Integrative multi‐omics analyses identify two BAT‐specific enhancers, with PGC1A‐En1 functioning as the dominant regulatory element that maintains thermogenic capacity across species.
Duo Su   +10 more
wiley   +1 more source

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