Results 121 to 130 of about 23,648 (228)

Baseline Assumptions and Future Research Areas for Urban Air Mobility Vehicles [PDF]

open access: yes
NASA is developing Urban Air Mobility (UAM) concepts to (1) create first-generation reference vehicles that can be used for technology, system, and market studies, and (2) hypothesize second-generation UAM aircraft to determine high-payoff technology ...
Antcliff, Kevin   +3 more
core   +1 more source

Towards an extension of equivalent system mass for human exploration missions on Mars. [PDF]

open access: yesNPJ Microgravity, 2022
Ho D   +3 more
europepmc   +1 more source

Advancing the mapping of vegetation structure in savannas using Sentinel‐1 imagery

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
As vegetation structure monitoring is important for the understanding and conservation of savanna ecosystems, we explored the utility of C‐band synthetic aperture radar imagery for mapping both grassland and woody vegetation structure in the Greater Serengeti‐Mara Ecosystem.
Vera Thijssen   +3 more
wiley   +1 more source

Development of advanced avionics systems applicable to terminal-configured vehicles [PDF]

open access: yes
A technique to add the time constraint to the automatic descent feature of the existing L-1011 aircraft Flight Management System (FMS) was developed.
Heimbold, R. L.   +2 more
core   +1 more source

Space Economy and Sustainability: A Systematic Review

open access: yesSustainable Development, EarlyView.
ABSTRACT The space economy is booming thanks to the increasing investment of government agencies, private companies, and venture capitalists. From the beginning of the New Space era, the array of actors involved in the development of technologies for extra‐terrestrial activities has increased, as well as the downstream applications that foster ...
Marianna Valente   +2 more
wiley   +1 more source

The UV-Vis spectrum of the ClCO radical in the catalytic cycle of Cl-initiated CO oxidation. [PDF]

open access: yesCommun Chem
Chao W   +8 more
europepmc   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

open access: yesStrategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani   +2 more
wiley   +1 more source

Quantitative Technology Assessment in Space Mission Analysis [PDF]

open access: yes
New technologies will need to be developed to create feasible concepts for NASA's ambitious missions of the future, but quantitative assessments of the impacts that technologies have on systems or architectures are sporadic and often inadequate.
Arney, Dale C.
core   +1 more source

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