Results 151 to 160 of about 3,047,834 (351)

Stirling Convertor System Dynamic Model Developed [PDF]

open access: yes
Free-piston Stirling convertors are being developed for potential use on NASA exploration missions. In support of this effort, the NASA Glenn Research Center has developed the Stirling convertor System Dynamic Model (SDM).
Lewandowski, Edward J.   +1 more
core   +1 more source

Relationship Between Testosterone and Movement Patterns in Male Asian Black Bear (Ursus thibetanus)

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
Comparisons of mean fecal testosterone metabolite concentrations (mFTM) and behavioral variables between the breeding (May–July) and post‐breeding (August–November) seasons. The asterisks indicate significant differences. ABSTRACT In male mammals, reproduction and reproductive behavior are strongly influenced by testosterone. While some species exhibit
Naoki Takekoshi   +11 more
wiley   +1 more source

Magnetic bearings for free-piston Stirling engines [PDF]

open access: yes
The feasibility and efficacy of applying magnetic bearings to free-piston Stirling-cycle power conversion machinery currently being developed for long-term space missions are assessed.
Curwen, P. W.   +3 more
core   +1 more source

Ringed Seal (Pusa hispida) Haul‐Out Behavior and Emergence Timing in the Bering, Chukchi, and Beaufort Seas

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
In the spring, ringed seals (Pusa hispida) shift from predominantly hauling out in lairs to predominantly hauling out on the surface of the sea ice to bask and molt, a transition we refer to as “emergence.” We used hidden Markov models (HMMs) to analyze haul‐out timelines from satellite‐linked transmitters to estimate emergence dates of ringed seals ...
Jessica M. Lindsay   +6 more
wiley   +1 more source

Automotive Stirling engine development program [PDF]

open access: yes
The major accomplishments were the completion of the Basic Stirling Engine (BSE) and the Stirling Engine System (SES) designs on schedule, the approval and acceptance of those designs by NASA, and the initiation of manufacture of BSE components.
Cronin, M.   +8 more
core   +1 more source

Multiple stressors in river networks: local and downstream effects on freshwater macroinvertebrates

open access: yesEcography, Volume 2026, Issue 1, January 2026.
River networks are complex ecosystems characterized by a continuous exchange of material and energy through longitudinal gradients. These ecosystems are threatened by various human‐induced stressors, which frequently co‐occur and may interact in complex ways, potentially triggering cascading effects throughout the river network.
Gemma Burgazzi   +9 more
wiley   +1 more source

On the dynamic response of pressure transmission lines in the research of helium-charged free piston Stirling engines [PDF]

open access: yes
In free piston Stirling engine research the integrity of both amplitude and phase of the dynamic pressure measurements is critical to the characterization of cycle dynamics and thermodynamics.
Dudenhoefer, James E., Miller, Eric L.
core   +1 more source

Home - About - Disclaimer - Privacy