Results 141 to 150 of about 63,168 (257)

Thermal analysis of stirling cycle regenerators

, 2020
Stirling cycle cryocoolers are used widely in military applications. The regenerator is the key element of Stirling cycle cryocoolers. It is known that performance of the regenerator directly affects the cryocooler performance. Therefore, any improvement on the regenerator will lead to a more efficient cryocooler.
openaire   +1 more source

Free-piston Stirling technology for space power [PDF]

An overview is presented of the NASA Lewis Research Center free-piston Stirling engine activities directed toward space power. This work is being carried out under NASA's new Civil Space Technology Initiative (CSTI).
Slaby, Jack G.
core   +1 more source

Newly Discovered Active Faults in the Wairarapa Valley: Implications for Multi‐Fault Rupture and Kinematics in the Southern North Island, Aotearoa New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Active fault locations and constraints on the timing and size of earthquakes are important for understanding and mitigating seismic hazard in Aotearoa New Zealand. However, historical and instrumental records are too short to provide these data on most earthquake‐generating faults. Light detection and ranging (lidar) data provide us with the ability to
Genevieve L. Coffey, Nicola J. Litchfield, Regine Morgenstern, Robert M. Langridge, Dougal Townsend   +4 more
wiley   +1 more source

Stirling Convertor System Dynamic Model Developed [PDF]

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., Regan, Timothy F.   +1 more
core   +1 more source

The Changing Geographies of Ageing and Age Mixing Across Urban–Rural Areas in Scotland, 2011–2022

Population, Space and Place, Volume 32, Issue 2, March 2026.
ABSTRACT Like other high‐income countries, Scotland is experiencing rapid population ageing, with evidence of spatial polarisation of age groups. This study uses the Scottish Censuses of 2011 and 2022 to understand patterns and trends in the geographies of ageing and age mixing.
Rachel Z. Wilkie, Nissa Finney, Alice Butler‐Warke, Qiong He, Elspeth Graham, Jo Mhairi Hale   +5 more
wiley   +1 more source

A feasibility assessment of magnetic bearings for free-piston Stirling space power converters [PDF]

This report describes a design and analysis study performed by Mechanical Technology Incorporated (MTI) under NASA Contract NAS3-26061. The objective of the study was to assess the feasibility and efficacy of applying magnetic bearings to free-piston ...
Curwen, Peter W., Rao, Dantam K., Wilson, Donald R.   +2 more
core   +1 more source

The Breast Cancer Treatment Experience for a Breast Cancer Patient Living With Intellectual or Developmental Disabilities in Ontario, Canada: A Critical Realist Case Study

British Journal of Learning Disabilities, Volume 54, Issue 1, Page 3-14, March 2026.
ABSTRACT Background Adult females with intellectual or developmental disabilities are more likely to die following a breast cancer diagnosis. Differences in access to cancer treatment may contribute to these survival differences. We explored how one woman with intellectual or developmental disabilities received guideline‐recommended breast cancer ...
Rebecca Hansford, Helene Ouellette‐Kuntz, Virginie Cobigo, Alyson Mahar   +3 more
wiley   +1 more source

A 1987 overview of free-piston Stirling technology for space power application [PDF]

An overview is presented of the NASA Lewis Research Center free-piston Stirling engine activities directed toward space-power application. NASA Lewis serves as the project office to manage the newly initiated NASA SP-100 Advanced Technology Program.
Alger, Donald L., Slaby, Jack G.
core   +1 more source

Anaemic Streams: Iron and Essential Trace Metals Frequently Limit Primary Producer Biomass

Ecology Letters, Volume 29, Issue 3, March 2026.
Nutrient enrichment experiments in 41 streams across the eastern United States demonstrate that trace metals can limit the growth of primary producers. Trace metals are frequently co‐limiting with macronutrients and the availability of N and P in streams and watersheds are predictive of Fe and Zn limitation status.
David M. Costello, Olufemi J. Akinnifesi, Renn C. Schipper, Paisley Kostick, Jordyn T. Stoll, Scott D. Tiegs, Amy M. Marcarelli, Sally A. Entrekin, Raven L. Bier, Krista A. Capps, Dean E. Fletcher   +10 more
wiley   +1 more source

A Determinant of Stirling Cycle Numbers Counts Unlabeled Acyclic Single-Source Automata

Discrete Mathematics & Theoretical Computer Science, 2008
We show that a determinant of Stirling cycle numbers counts unlabeled acyclic single-source automata. The proof involves a bijection from these automata to certain marked lattice paths and a sign-reversing involution to evaluate the determinant.
David Callan
doaj