Results 121 to 130 of about 416,562 (354)

Urban adults' engagement in nature education and its interplay with everyday lived experiences: A case study from Shenzhen, China

People and Nature, EarlyView.
Abstract Currently, scholarship on education to foster connectedness with nature primarily focuses on children. As adults likewise face the disconnection from nature and play a key role in influencing children, it is important to understand how they perceive, engage in, and benefit from relevant programmes.
Xiaoxue Chen, Zuyi Lyu, Junxi Qian
wiley   +1 more source

PID‐Like Robust Control of Non‐Minimum Phase Robotic Manipulators

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper proposes an output‐feedback tracking controller for non‐minimum phase nonlinear systems with unknown uncertainties and external disturbances, where not all states are measurable, and the zero dynamics are unstable. The approach combines a backstepping‐based stabilizing state‐feedback law with a cascade extended high‐gain observer ...
Mohammad Al Saaideh, Almuatazbellah Boker, Mohammad Al Janaideh   +2 more
wiley   +1 more source

Analytical investigation of the landing dynamics of a large airplane with a load-control system in the main landing gear [PDF]

The results of an evaluation of an active load-control landing gear computer program (ACOLAG) for predicting the landing dynamics of airplanes with passive and active main gears are presented. ACOLAG was used in an analytical investigation of the landing
Carden, H. D., Mcgehee, J. R.
core   +1 more source

Subterranean Mine Inspection Using the Prometheus Re‐Configurable Drone

Journal 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, Robert Clarke, Ali Akbari, Ferdian Jovan, Jameel Marafie, Ognjen Marjanovic, Sara Bernardini, Tom Richardson, Simon Watson   +8 more
wiley   +1 more source

Increased Fidelity in Prediction Methods For Landing Gear Noise [PDF]

, 2006
An aeroacoustic prediction scheme has been developed for landing gear noise. The method is designed to handle the complex landing gear geometry of current and future aircraft. The gear is represented by a collection of subassemblies and simple components
Brentner, Kenneth S., Lockard, David P., Lopes, Leonard V., Morris, Philip J.   +3 more
core   +1 more source

Incorporating environmental DNA metabarcoding for improved benthic biodiversity and habitat mapping

Remote Sensing in Ecology and Conservation, EarlyView.
Seafloor imagery is commonly used to collect information about the distribution of benthic organisms in order to generate habitat and biodiversity maps. Recent advances in genomics (e.g., environmental DNA; eDNA) show potential to complement video surveys for habitat mapping, but there have been few examples testing this.
Rylan J. Command, Shreya Nemani, Benjamin Misiuk, Mehrdad Hajibabaei, Nicole Fahner, Emily Porter, Greg Singer, Beverly McClenaghan, Katleen Robert   +8 more
wiley   +1 more source

Reliability Evaluation of Landing Gear Retraction/Extension Accuracy Based on Bayesian Theory

Aerospace
The angular motion of aircraft landing gear retraction and extension must be accurate to ensure flight safety. Therefore, this study experimentally evaluated the motion accuracy of the landing gear retraction and extension processes associated with a ...
Yuanbo Lv, Xianmin Chen, Yao Li, Yuxiang Tian, Feng Zhang   +4 more
doaj   +1 more source

Validation of an Active Gear, Flexible Aircraft Take-off and Landing analysis (AGFATL) [PDF]

The results of an analytical investigation using a computer program for active gear, flexible aircraft take off and landing analysis (AGFATL) are compared with experimental data from shaker tests, drop tests, and simulated landing tests to validate the ...
Mcgehee, J. R.
core   +1 more source

Existing Sustainability Interventions are Insufficient to Scale Up Cocoa Agroforestry in West Africa

Sustainable Development, EarlyView.
ABSTRACT Sustainability transitions in agri‐food systems are required to address climate change, biodiversity loss, and social inequities. In the West African cocoa sector, supply chain sustainability initiatives (SSIs) have emerged as key environmental governance tools to address these challenges and promote agroforestry.
Keessy Maria‐Prisca Kouakou, Joss Lyons‐White, William J. Thompson, Thomas Addoah, Federico Cammelli, Wilma J. Blaser‐Hart, Victoria Maguire‐Rajpaul, Evans Dawoe, Rachael D. Garrett   +8 more
wiley   +1 more source

Static Footprint Local Forces, Areas, and Aspect Ratios for Three Type 7 Aircraft Tires [PDF]

The National Tire Modeling Program (NTMP) is a joint NASA/industry effort to improve the understanding of tire mechanics and develop accurate analytical design tools. This effort includes fundamental analytical and experimental research on the structural
Howell, William E., Perez, Sharon E., Vogler, William A.   +2 more
core   +1 more source