Results 61 to 70 of about 226,378 (280)

Long‐Range Time‐Correlated Single‐Photon Counting Lidar 3D‐Reconstruction From a Moving Ground Vehicle

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT Time‐correlated single‐photon counting (TCSPC) lidar enables high‐resolution 3D imaging at kilometer range. While previous works have covered long range TCSPC 3D imaging from either stationary or airborne platforms, this is, to the best of our knowledge, the first attempt that use a moving ground vehicle. Fusing measurements taken at different
Hannes Ovrén   +2 more
wiley   +1 more source

Study on mechanical properties of aeronautical composite material interference-fit structures in hygrothermal service

open access: yesHangkong gongcheng jinzhan
Currently,the study on the influence of hygrothermal environment on composite material is more inclined to the material composition structure,rather than the composite connection.
QIU Hongjun   +4 more
doaj   +1 more source

Subterranean Mine Inspection Using the Prometheus Re‐Configurable Drone

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT This paper describes the design, development, and real‐world testing of an autonomous drone for subterranean exploration, known as “Prometheus.” Driven by requirements from industry that the drone be able to be deployed through areas of restricted access, Prometheus was designed to be directly deployed through a 150 mm aperture.
Liam Brown   +8 more
wiley   +1 more source

Quasi-Static Crushing Simulation Research and Failure Mode Analysis of Composite Thin-Walled C-Channel Specimen

open access: yesJournal of Aeronautical Materials, 2017
To study the crushing energy-absorbing characteristics and failure mode, the multi-shells finite element model of composite thin-walled C-channel specimen was established based on the quasi-static crushing test results.
XIE Jiang   +4 more
doaj   +1 more source

Assessing the Physical Habitat Condition of Navigable Canals and Rivers in England

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT Monitoring can identify environmental problems and help to set environmental objectives, design management interventions, and assess environmental responses. The need to monitor rivers for such purposes has long been emphasized, but canals have received less attention.
Angela Gurnell   +3 more
wiley   +1 more source

Some comparisons of US and USSR aircraft design developments [PDF]

open access: yes
A review is given of the design and development of some US and USSR aircraft. The emphasis is on the historical development of large aircraft-civil and military transports and bombers.
Spearman, M. L.
core   +1 more source

Civil aircraft and aircraft engines : 2000 [PDF]

open access: yes, 2001
Current industrial report.

core  

Quantifying aboveground herbaceous biomass in grassy ecosystems: a comparison of field and high‐resolution UAV‐LiDAR approaches

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
The abundance of herbaceous vegetation in grassy ecosystems—which cover >25% of the world's land surface—is highly variable and impacts key ecological processes including carbon sequestration and support for grazing wildlife and livestock. Here, we present a method for using high‐resolution, UAV‐borne Light Detection and Ranging (LiDAR) to estimate ...
Tyler C. Coverdale   +3 more
wiley   +1 more source

Aerotainment—A New Paradigm for Sustainable Development in Tourism

open access: yesSustainable Development, EarlyView.
ABSTRACT Cities have been testbeds for urban sustainability transition initiatives for nearly 20 years. However, most initiatives related to the visitor economy have tended to overlook the fact that tourism is a system with a complex network of stakeholders reaching well beyond the geographical boundaries of a destination.
Lázaro Florido‐Benítez   +1 more
wiley   +1 more source

Supersonic Technology Concept Aeroplanes for Environmental Studies [PDF]

open access: yes
The International Civil Aviation Organization is considering new environmental standards for future supersonic civil aircraft. NASA is supporting this effort by analyzing several notional, near-term supersonic transports.
Berton, Jeffrey J.   +3 more
core   +1 more source

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